EP3492752B1 - Impeller pump - Google Patents
Impeller pump Download PDFInfo
- Publication number
- EP3492752B1 EP3492752B1 EP18207152.2A EP18207152A EP3492752B1 EP 3492752 B1 EP3492752 B1 EP 3492752B1 EP 18207152 A EP18207152 A EP 18207152A EP 3492752 B1 EP3492752 B1 EP 3492752B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- auxiliary outlet
- additional outlet
- pump chamber
- flap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012530 fluid Substances 0.000 claims description 74
- 238000007789 sealing Methods 0.000 claims description 17
- 238000005086 pumping Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000013013 elastic material Substances 0.000 description 8
- 239000004033 plastic Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
- F04D15/0016—Control, e.g. regulation, of pumps, pumping installations or systems by using valves mixing-reversing- or deviation valves
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4285—Water-heater arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4293—Details of fluid inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/48—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps
- F04D29/486—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/38—Retaining components in desired mutual position by a spring, i.e. spring loaded or biased towards a certain position
Definitions
- the invention relates to an impeller pump as it is used in particular in a water-bearing household appliance such as a washing machine or a dishwasher.
- an impeller pump is known with a pump chamber including inlet and outlet.
- An additional outlet from the pump chamber is provided, which can be closed by an additional outlet flap.
- the additional outlet flap has two stable positions. Depending on the direction of rotation of an impeller of the impeller pump, the additional outlet flap is held stably in a closed position or stably in an open position, with fluid then being able to be pumped out to the additional outlet or not.
- an impeller pump is known with an inlet into and an outlet from a pump chamber. An additional outlet from the pump chamber is provided.
- An impeller can turn in two directions of rotation. In one direction of rotation, it conveys fluid out to the outlet and closes the additional outlet by means of a movable flap made of elastic material. In the other direction of rotation, the fluid flow pushes the elastic flap away from the additional outlet so that it is open and fluid can be conveyed through here.
- an impeller pump for a dishwasher, which has an additional outlet at an outlet from a pump chamber. This is spring-loaded. An opening is closed by an elastic membrane body which is held in the closed position under spring tension.
- Another impeller pump is known with a pump chamber that rotates approximately in a ring around an impeller.
- An additional outlet which is closed by means of an additional outlet flap, extends in the lateral direction from an outer circumferential wall of the pump chamber. If the impeller rotates in a main direction of rotation, a flow is generated in the pump chamber that holds the additional outlet flap in a closed position, whereby the additional outlet is and remains closed. If the impeller rotates in the opposite direction, the flow opens the additional outlet flap and releases the additional outlet.
- the additional outlet flap opens so far that it closes the main outlet from the pump chamber. This is achieved by arranging the additional outlet and the additional outlet flap in a region of the outer wall of the pump chamber which lies outside the impeller in the radial direction.
- the invention is based on the object of creating an impeller pump mentioned at the beginning, with which the problems of the prior art can be solved and, in particular, it is possible to pump water out of a household appliance in which the impeller pump is installed as simply and efficiently as possible at the same time . to be able to empty the pump chamber.
- the impeller pump has a pump chamber on or in which an inlet into the pump chamber and an outlet from the pump chamber are provided.
- An impeller rotates in the pump chamber, usually driven by a pump motor flanged to or attached to the pump.
- the impeller has a direction of rotation to pump fluid from the inlet to the outlet. This is a preferred direction of rotation, the blades of the impeller being particularly preferably shaped or bent in such a way that they can convey the fluid particularly efficiently from the inlet to the outlet in this direction of rotation of the impeller.
- An additional outlet from the pump chamber including an additional outlet flap on it or for it.
- the additional outlet flap has a closed position and at least one open position. Between these two positions it is movable, advantageously designed to be rotatable, or alternatively bendable. It is preferably designed to be rotatable about an axis, that is to say is rotatably mounted and is not only designed to be elastically movable and deflectable, for example by bending or twisting.
- the additional outlet flap closes the additional outlet, advantageously largely or even completely.
- the additional outlet flap can be approximately the same size as the additional outlet, advantageously somewhat larger.
- the additional outlet is at least partially open or the additional outlet flap at least partially releases or opens it.
- the additional outlet can therefore be more or less open.
- an adjusting means is provided, whereby the additional outlet flap is so force-loaded that it is automatically moved from the closed position to one of the open positions when no fluid or water is pumped from the inlet to the outlet or when the additional
- the outlet flap is free of fluid flow in the direction of rotation of the impeller for pumping the fluid during normal operation.
- the actuating means can therefore bring the additional outlet flap at least into the first open position or into the least open open position. Under certain circumstances it can therefore be sufficient if the actuating means open the additional outlet flap only a little.
- the additional outlet flap including the actuating means which are advantageously passive actuating means, with the automatic opening, actuators such as electromagnets, piezo drives or electric motors that need to be controlled specifically can be dispensed with. This considerably simplifies the construction of the impeller pump and its operation. Furthermore, installation space can also be saved.
- the additional outlet flap can be moved by the actuating means into that open position from the group of several open positions that is as wide as possible and / or in which it is as far as possible from the closed position. Position is removed. It can thus be achieved that the additional outlet flap is in the closed position. Starting in this closed position, a movement can be provided for opening, in which the additional outlet flap is initially slightly opened, for example after a rotation through only a few degrees of arc angle. However, the actuating means tries to open the additional outlet flap even further, in particular to open it as far as possible. Then, even if the direction of rotation of the impeller is reversed, as much fluid or water as possible can be pumped to the additional outlet from the pump chamber.
- the additional outlet flap has rotated through an angle of 10 ° to 45 °, preferably 15 ° to 30 °. If the fluid flows in the opposite main direction of rotation of the impeller, i.e. if its direction of rotation is reversed, towards the open additional outlet flap and through the additional outlet, a particularly high efficiency can be achieved by the additional outlet flap. It not only closes the additional outlet in the closed position, but also directs the fluid as well as possible into the additional outlet when the impeller is rotating in the opposite direction in the open position, in particular in the open position that is as wide as possible.
- the actuating means can be several possibilities for the formation of the actuating means. They are advantageously designed to be resilient or have spring means as adjusting means in order to load the additional outlet flap with force so that it moves out of the closed position.
- the spring means should be installed in such a way that they impede a fluid flow as little as possible.
- plastic spring means can advantageously be used as the spring means. These have the advantage that they do not corrode in permanent contact with water.
- Such spring means can advantageously have a voluminous block body, which can particularly advantageously have a cylindrical shape.
- the spring means can have the shape of a cuboid and consist of elastic material, in particular plastic.
- a suitable plastic here is silicone, and possibly also rubber.
- a conventional spring can be used, for example a leaf spring, a helical spring, a spiral spring or a combined helical spiral spring.
- a spring can also be wound around an axis of rotation and, through twisting or twisting, build up a torque which then tries to open the additional outlet flap.
- the additional outlet flap itself can be soft or elastic or consist of such an elastic material, in particular an elastomer, that it itself forms the adjusting means or the spring means by which it is opened.
- the spring or the spring action is then integrated into the additional outlet flap, so to speak. It can be slightly open in a normal position without fluid flow, that is to say in a relatively slightly open open position. Depending on the direction of flow, it is then pushed open or closed or pushed into the closed position, thus closing the additional outlet.
- the pump can have sealing means on the additional outlet and / or on the additional outlet flap. These are advantageously designed to run around the additional outlet, but at least along one side, for example close to the impeller.
- the additional outlet flap can thus be kept relatively simple. Provision can be made for a sealant to be injected onto the pump housing, for which a multi-component injection molding process is particularly advantageously suitable. This is particularly advantageous when the sealant has a type of sealing lip, round cord seal or the like. is.
- the sealing means can then namely also have a sealing rubber which, due to its elasticity, ensures a sealing effect in the closed position.
- These sealing means can also be formed by the aforementioned design of the additional outlet flap made of elastic material, so that the flap itself also seals sufficiently due to its soft material.
- a labyrinth seal can also be provided between the additional outlet flap and the edge of the additional outlet on or near which the flap runs.
- a labyrinth seal can have a stepped course of a sealing surface between the additional outlet and the additional outlet flap, for example with one to three angular steps.
- the sealing effect may not be as good as that of an elastic rubber seal, but it is sufficient for the impeller pump to operate.
- the additional outlet flap in the closed position negatively affects the operation of the pump and the efficiency of the pump as little as possible. It should also have as little or no additional flow resistance as possible represent when the impeller is pumping fluid from the inlet to the outlet of the pump chamber.
- the additional outlet flap in the closed position continues the course of the pump chamber or a wall of the pump chamber in this area around the flap, in particular also curves and / or bulges corresponding to the area surrounding the additional outlet of the pump chamber determine the design of the additional outlet flap at least on its outside. If the surrounding area of the pump chamber is flat, then the outlet flap can also be designed to be flat on the outside. Thus, in the closed position, the pump chamber, in particular its wall, should have a shape as if the additional outlet flap did not even exist.
- the additional outlet flap has an inside which, in the closed position, points towards the additional outlet. It therefore faces away from the pump chamber, while the aforementioned outside of the additional outlet flap covers the additional outlet or is the surface on which the fluid flows from inlet to outlet during pumping, especially in the closed position.
- the inside can advantageously be convexly curved, namely convexly away from the additional outlet or towards the pump chamber. This special shape is intended to ensure that in the open position of the additional outlet flap or the maximum open position, the fluid that flows through the opened additional outlet flap into the additional outlet when the impeller rotates in the opposite direction flows into the additional outlet as quickly and efficiently as possible. Through this curvature, the pumped fluid should be captured as well as possible, so to speak, and directed into the additional outlet.
- a lateral wall can advantageously be provided on the inside of the additional outlet flap, which has an angle between 60 ° and 120 ° to the outside. If the outside is flat or is largely flat, this angle can also be between 80 ° and 100 °. It can particularly advantageously be 90 ° or a little less.
- lateral wall is never completely moved out of the opening of the additional outlet when the pump is in operation.
- a stop can be provided, advantageously on the lateral wall itself, which can hit an inner edge of the additional outlet.
- the lateral wall can preferably have a longitudinal outer edge which, in the maximally wide open position, runs over a large part of its length in a direction away from the axis of rotation of the additional outlet flap, in particular over its entire length, within the additional outlet. In this way, on the one hand, a certain guidance of the additional outlet flap can be achieved or a support in the open positions and especially in the fully open position.
- a projection or the like can be provided on the lateral wall. be provided for the aforementioned stop, in particular on the named free longitudinal outer edge of the lateral wall, particularly preferably as far away as possible from the axis of rotation of the additional outlet flap, which just forms the stop on the pump housing or on the wall of the pump chamber.
- the maximum wide open open position is precisely limited. In this way, an opening that is too wide can be avoided, which would possibly no longer be favorable in terms of flow.
- the additional outlet flap can also be prevented from being torn out.
- the lateral wall runs parallel to a circumferential outer wall of the pump chamber.
- the lateral wall can therefore also be curved in its longitudinal course away from the axis of rotation of the additional outlet flap.
- the lateral wall can extend at a distance from a circumferential outer wall of the pump chamber that is between 0.5 cm and 2 cm. This means that the lateral wall can have a relatively small distance from the outer wall of the pump chamber, but that this distance is already given. This is particularly advantageous when the impeller pump has a heated outer wall of the pump chamber.
- the additional outlet flap still has to be integrated into the existing installation space in the pump chamber.
- the pump chamber runs annularly around the impeller.
- the additional outlet is arranged in an annular end face of the pump chamber in the axial direction along the axis of rotation of the impeller. This is a bottom surface or a top surface of the pump chamber.
- Such an end face is arranged in such a way that it runs approximately in a plane of one of the two top faces of the impeller. It can particularly advantageously be provided that this end face is remote from the outlet from the pump chamber, see FIG DE 102013211180 A1 . It can thus be achieved that the fluid flow behaves quite differently when pumping fluid out of the outlet than when pumping out of the additional outlet.
- the provision of the additional outlet flap on one of the named End faces of the pump chamber and not on a radially outer wall of the pump chamber has the advantage that this wall can thus be designed to be closed, for example made of metal with external heating conductors.
- the arrangement of the additional outlet in an end surface of the pump chamber, which runs in a plane of one of the two top surfaces of the impeller, has the advantage that when pumping fluid with the direction of rotation of the impeller for pumping out of the additional outlet, the between the Fluid flowing out of both top surfaces of the impeller can flow relatively directly to the additional outlet. Since the additional outlet flap is close to the impeller in the fully open position, in particular in the radial direction, for example with a maximum radial distance of 1 cm, fluid can also be pumped out to the additional outlet as well as possible.
- an aforementioned inside of the additional outlet flap is approximately at the axial height and radially outside the other top surface of the impeller, in such a way that fluid from the impeller is directed radially outward into the additional outlet flap and thus into the additive -Outlet flows.
- a type of flow channel for the fluid is thus formed between the end surface of the pump chamber in which the additional outlet flap is provided and the additional outlet flap itself or its previously described inside. These two surfaces can then roughly coincide with the plane in which the aforementioned top surfaces of the impeller run, so that fluid can be pumped out of the additional outlet as well as possible.
- the additional outlet can lead out of the pump chamber in the radial direction or in a plane perpendicular to an axis of rotation of the impeller.
- the additional outlet then advantageously also leads out of an entire housing of the impeller pump, for example on a pipe socket which is well suited for connecting water lines or hoses, in particular elastic hoses.
- the additional outlet flap is held down by the pumped fluid during the main direction of rotation of the impeller and thus held in the closed position so that the additional outlet is closed, preferably only by the pumped fluid.
- the aforementioned actuating means presses the additional outlet flap from the closed position during the pumping of the fluid into an open position.
- the actuating means can advantageously try to push the additional outlet flap into the open position, which is open to the maximum extent, but this does not have to be the case.
- the opening of the additional outlet flap with a small opening path can be regarded as sufficient, namely if the fluid moved by the impeller in the other direction of rotation opens the additional outlet flap completely or pushes it open into the maximally wide open position.
- the spring means can therefore ensure a certain, relatively slightly open, open position. The complete opening of the additional outlet flap is then brought about by the flow of the fluid in the pumping direction for pumping out of the pump.
- an impeller pump according to the invention is shown as a pump 11 in an oblique view, as it is technically and structurally largely a pump corresponding to the aforementioned DE 102013211180 A1 is equivalent to.
- the pump 11 has a pump housing 12 including an axial inlet 14 and a radial outlet 16.
- a drive part 18 is connected, which in particular contains a drive motor.
- an additional outlet 37 is provided at the front of the pump housing 12 directly next to the inlet 14. Its direction of extension is approximately parallel to that of the outlet 16, but this does not have to be the case.
- the additional outlet 37 is a short pipe, at the end of which different connection options for further lines such as pipes or hoses can be provided. This does not need to be explained further to the person skilled in the art.
- FIG. 2 A view into a pump chamber 22 is shown from the viewing direction of the distant drive part 18.
- the additional outlet 37 from the pump chamber 22 can be seen on the left-hand side.
- a chamber wall 24 is shown as a circumferential and closed ring, advantageous Made of metal with external heating conductors or heating elements. This is also known in the aforementioned prior art.
- Guide vanes 25 are shown within the chamber wall 24. These are attached or molded on the outside of a drive receptacle 27, into which in particular an aforementioned drive motor can protrude.
- the impeller and also the additional outlet are provided below the drive receptacle 27 in the plane of the drawing.
- the structure from the can be seen more precisely Fig. 3 with the partially cut oblique representation.
- the drive receptacle 27 is also here Fig. 2 removed, and it can be clearly seen that a circumferential bottom surface 29 is provided within the lower or front end of the chamber wall 24.
- This bottom surface 29 runs largely in one plane or is flat and can be approximately at right angles to the chamber wall 24, but of course it does not have to be.
- the ring-shaped bottom surface 29 surrounds, so to speak, an impeller 30 or, as will be explained in more detail below, is arranged slightly sunk in a central recess in the bottom surface 29.
- the impeller 30 has a bottom disk 32 and a cover disk 33 as top surfaces. Later in the Fig. 8 it can be seen that this bottom disk 32 runs largely sunk in the bottom surface 29, so that its upper side only protrudes slightly above the plane of the bottom surface 29. Five curved impeller blades 35 run between the bottom disk 32 and the cover disk 33.
- the impeller 30 rotates to the right or clockwise in the conveying direction FR shown with a thick arrow.
- the conveyed fluid or water then rotates in this direction within the chamber wall 24 or circulates and can optionally be heated. It then exits the pump chamber 22 again in a tangential direction at an end region remote from the bottom surface 29, specifically through the outlet 16.
- the additional outlet 37 can lead to a sewer pipe or a sewer hose from a water-carrying household appliance in which the pump 11 is installed, and from there to a drain or a drain pipe in the house.
- the additional outlet opening 39 has an elongated shape and is curved. Its curvature corresponds exactly to the course of the impeller 30 radially inside it and the chamber wall 24 radially outside it, so its longitudinal edges are, so to speak, parallel to both. Their length is about three to four times as great as their width.
- the additional outlet opening 39 has two axle bearing depressions 40. These serve for the articulated mounting of the flap.
- a step edge 42 is provided along the radially inner edge or the radially inner longitudinal side. This need not be provided on the radially outer edge. The transition from the additional outlet opening 39 to the additional outlet connection 37 underneath is not shown exactly, but should be optimally shaped in terms of fluid technology.
- the additional outlet opening 39 is closed by means of an additional outlet flap 44.
- the additional outlet flap 44 closes the additional outlet opening 39 very well fitting or closes it, so that only a thin edge is visible. Furthermore, this connection is actually already sufficiently tight.
- the step edge 42 is provided as an additional sealing means or as a kind of simple labyrinth seal, as mentioned at the beginning.
- an elastic sealing material or a sealing rubber could very well be provided, for example also by injection molding.
- such a separate seal made of elastic material or conventional sealing material could also be provided on a corresponding edge or side of a flap.
- the additional outlet flap 44 itself could also consist of such an elastic material as a seal and thus itself effect the sealing function.
- the additional outlet flap 44 has an outer side 45 which is a continuation of the surfaces of the pump chamber 22 that surround it. Since the additional outlet opening 39 lies completely within the planar annular bottom surface 29, this outer side 45 is also planar and does not protrude beyond this bottom surface 29. Since the chamber wall 24 is a separate component of its own here and consists in particular of metal because of the heat conductors attached to the outside, integration of the additional outlet flap 44 into the throat or the transition area between the bottom surface 29 and the chamber wall 24 is not possible. Theoretically, however, this would be conceivable and also easily feasible in and of itself.
- the additional outlet flap 44 is mounted on the additional outlet opening 39 by means of two molded short stub axles 48 which are located in the axle bearing depressions 40. Under certain circumstances, they can be held therein by latching means, for example by more than 180 ° circumferential axle bearing recesses, so that they do not jump out by themselves and the additional outlet flap 44 is possibly lost.
- the additional outlet flap 44 is shown in detail, on the one hand from the front and above and on the other hand from the side and above. It can be seen that the additional outlet flap has an inner side 46 opposite the outer side 45.
- the two aforementioned stub axles 48 are integrally formed at the rear end.
- a lateral wall 50 is provided on the outside and is connected in one piece to the flat flap or manufactured in one piece. This curved lateral wall 50 has an inner surface 51 and an outer surface 52. It should be noted that the lateral wall 50 is at an angle ⁇ of approximately 80 ° to the outer surface 52. As follows from the Fig.
- this lateral wall 52 is it is mainly to capture the fluid emerging from the impeller 30 in the radial direction or with a large radial directional component, so to speak, and to divert it downward into the additional outlet opening 39, as in FIG Fig. 7 shows.
- an optionally provided projection 54 is shown in dashed lines. This can reach under a front edge of the additional outlet opening 39 when swiveling open or when swiveling the additional outlet flap 44 upwards, that is to say towards the maximally wide open open position. By striking this projection 54 below the bottom surface 29, this open position, which is open to the greatest possible extent, can be defined or reached. Since the projection 54 is not arranged within the direct fluid flow, it also does not interfere with the flow. Furthermore, the lateral wall 50 is always within the additional outlet opening 39 for a good introduction of the fluid into it.
- adjusting means for opening the additional outlet flap 44 with pivoting about the axis of rotation through the stub axle 48
- different spring means could be provided, for example known torsion springs in the manner of a helical spring with one or two turns and very long free legs. These could on the one hand be supported on the inside 46 and on the other hand below the additional outlet opening 39.
- a block-shaped body of resilient plastic or foam mentioned at the beginning could be provided on the left edge of the additional outlet flap 44, for example in the area towards the step edge 42. This could also be provided on the lower edge of the lateral wall 50, where it is in the closed position according to FIG Fig. 4 runs.
- the additional outlet flap 44 is only opened slightly is, for example, a few degrees of rotation angle or a few millimeters at the front end, opposite the end with the stub axles 48.
- the fluid flow then circulates in the direction of rotation ER, it can, so to speak, reach under the slightly opened additional outlet flap 44 and tear it open or push it open completely .
- FIG. 7 and 8th shows the maximally wide open open position of the additional outlet flap 44. It can be seen that it is open so wide that the inside 46 is even a little above the plane of the underside of the cover disk 33, whereby the impeller 30 in FIG fluid conveyed or thrown out in the radial direction or at least in a partially radial direction is thrown in this area directly against this inner side 46 and the inner surface 51 of the lateral wall 50. In this way, fluid is captured particularly well in this area and conveyed through the additional outlet opening 39 to the additional outlet connection 37, that is to say out of the pump 11.
- Fig. 8 it can also be seen that the radial distance between the additional outlet flap 44 or its lateral wall 5 including the outer surface 52 is quite large here.
- the fluid forced outwards by centrifugal force due to the circulation in the pump chamber 22 could also relatively frequently run past the additional outlet flap 44 during emptying, which would make complete emptying somewhat more difficult.
- a certain spacing of the bottom surface 29 in the radial direction is necessary and therefore no widening or relocation of the additional outlet flap 44 further outwards to the chamber wall 24 is possible. In other designs of pumps according to the invention, however, this is possible and could then also be provided.
- ⁇ approx. 80 °.
- a rounding or a groove could be provided. This could have advantages in terms of flow technology, but does not have to be so.
- the distance in the radial direction between the impeller 30 and the additional outlet flap 44 or its rounded, radial inner edge is like that Fig. 4 and 7th show relatively low. It is, for example, 1 mm to 3 mm, precisely enough that sufficient stability of the bottom surface 29 is also ensured in this area.
- an additional outlet flap 144 shown in a simplified manner, is arranged in a pump chamber 122 or within the bottom surface 129.
- the additional outlet flap 144 is rotatably mounted at the left end by means of a corresponding axle stub 148 in an axle bearing recess 140.
- the additional outlet flap 144 which is designed to be flat here, has an outer side 145 which is advantageously flat and smooth, as in the previous exemplary embodiment, in order to offer little water resistance.
- a spring receptacle 156 is provided on an inner side 146, which has, for example, 50% of the width of the additional outlet flap 144 and is arranged centrally.
- the spring receptacle 156 has a wide and flat slot which is open at least at the lower end and into which a leaf spring 159 is inserted as an adjusting means according to the invention with an upper spring end 158.
- This upper spring end 158 which is shown in dashed lines here, could have one or more punched-out prongs or elevations by which it is held in place after being inserted into the spring receptacle 156 and can no longer be pulled out or does not come out by itself .
- the leaf spring 159 is advantageously made of a stainless steel or spring steel with, for example, about a third of the width of the additional outlet flap 144. Alternatively, it can be made of plastic. Their spring force can be relatively small. In a central area it is slightly curved, and with a lower spring end 160, which is bent again somewhat more strongly at the very end, the leaf spring 159 rests against a wall of the additional outlet opening 139 or is supported against it.
- leaf spring 159 It is not a significant problem to design the spring force of the leaf spring 159 accordingly.
- a correspondingly thin material can be provided for the leaf spring 159; alternatively, lateral incisions or the like can also be used. be provided.
- Fastening the leaf spring 159 is considered to be advantageous, particularly advantageous by inserting it into the spring receptacle 156 at the top.
- it could also be attached to the left inner wall of the additional outlet opening 139, for example with a similarly designed spring receptacle, and then be supported with a free end on the inside 146 of the additional outlet flap 144 and possibly slide along it a little.
- a helical spring made of spring wire with long protruding legs could be arranged around an axis corresponding to the stub shafts 148, which presses open the additional outlet flap 144 and is supported on the same inner wall of the additional outlet opening 139. Then just such a spring, the type of which is basically known, would be fastened to these stub axles or a corresponding axis of rotation for pressing open or closed by means of torque.
- FIG. 10 Yet another embodiment is in the Fig. 10 shown, in which an additional outlet flap 244 is not rotatably mounted about a defined axis of rotation by means of stub axles, but is arranged in a receptacle 241 by means of a rectangular bearing end 249.
- the receptacle 241 has a corresponding shape and is designed in principle similar to the axle bearing recesses 40 and 140, only with a flat cross-section.
- the angular bearing end 249 sits in the receptacle 241 so that it is non-rotatable, and the additional outlet flap 244 itself is so soft or elastic or consists of such an elastic material that it itself forms the actuating means through which it is opened, i.e.
- the upper solid representation in Fig. 10 shows the additional outlet flap 244 in one Open position with fluid flow with the direction of rotation ER as in Fig. 9 above. It can be clearly seen that a sufficiently large inlet for the fluid into the additional outlet opening 239 is possible here.
- the additional outlet flap 244 can therefore itself have and fulfill a sealing function through a suitable choice of material, because it and especially its free end is flexible and can cling to the edge of the additional outlet opening 239 Providing a seal, in particular a seal made of a different material, closes the additional outlet or the additional outlet opening 239. A stepped edge does not even need to be provided so that the additional outlet flap 244 disappears flush and seals off better, but the additional outlet flap 244 can rest around the additional outlet opening 239 on the bottom surface 229.
- FIG. 10 Shown in dashed lines in the Fig. 10 at the top is a position into which the additional outlet flap 244 moves independently by its own spring force when there is no fluid flow at all. It can be seen from this that the additional outlet flap 244 opens here only a relatively small amount due to its own spring force, that is to say, as it were, as its own actuating means. The further opening into the open position shown in solid lines then takes place precisely through the fluid flow with the direction of rotation ER, which presses it open a little further or bends it open a little further.
- a relatively rigid additional outlet flap have an angular bearing end, which is partially resiliently encased and then so to speak in the receptacle against this Spring elasticity rotates.
- an angular bearing end can be surrounded by a layer of relatively soft plastic or foam and can be rotated against its resilience into the closed position by a relatively strong fluid flow in the direction of rotation FR. If this fluid flow stops, the resilient plastic can press open the additional outlet flap 244.
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Description
Die Erfindung betrifft eine Impellerpumpe, wie sie insbesondere in einem wasserführenden Haushaltsgerät wie beispielsweise einer Waschmaschine oder einem Geschirrspüler eingesetzt wird.The invention relates to an impeller pump as it is used in particular in a water-bearing household appliance such as a washing machine or a dishwasher.
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Der Erfindung liegt die Aufgabe zugrunde, eine eingangs genannten Impellerpumpe zu schaffen, mit der Probleme des Stands der Technik gelöst werden können und es insbesondere möglich ist, Wasser aus einem Haushaltsgerät, in dem die Impellerpumpe verbaut ist, möglichst einfach und gleichzeitig möglichst effizient abpumpen bzw. die Pumpenkammer entleeren zu können.The invention is based on the object of creating an impeller pump mentioned at the beginning, with which the problems of the prior art can be solved and, in particular, it is possible to pump water out of a household appliance in which the impeller pump is installed as simply and efficiently as possible at the same time . to be able to empty the pump chamber.
Gelöst wird diese Aufgabe durch eine Impellerpumpe mit den Merkmalen des Anspruchs 1. Vorteilhafte sowie bevorzugte Ausgestaltungen der Erfindung sind Gegenstand der weiteren Ansprüche und werden im Folgenden näher erläutert. Der Wortlaut der Ansprüche wird durch ausdrückliche Bezugnahme zum Inhalt der Beschreibung gemacht.This object is achieved by an impeller pump having the features of claim 1. Advantageous and preferred embodiments of the invention are the subject matter of the further claims and are explained in more detail below. The wording of the claims is made part of the content of the description by express reference.
Es ist vorgesehen, dass die Impellerpumpe eine Pumpenkammer aufweist, an oder in der ein Einlass in die Pumpenkammer und ein Auslass aus der Pumpenkammer vorgesehen sind. In der Pumpenkammer dreht sich ein Impeller, üblicherweise angetrieben von einem an die Pumpe angeflanschten oder an dieser befestigten Pumpenmotor. Der Impeller weist eine Drehrichtung auf, um Fluid vom Einlass zum Auslass zu pumpen. Dies ist eine bevorzugte Drehrichtung, wobei besonders bevorzugt Schaufeln des Impellers derart geformt bzw. gebogen sind, dass sie in dieser Drehrichtung des Impellers das Fluid besonders effizient vom Einlass zum Auslass fördern können.It is provided that the impeller pump has a pump chamber on or in which an inlet into the pump chamber and an outlet from the pump chamber are provided. An impeller rotates in the pump chamber, usually driven by a pump motor flanged to or attached to the pump. The impeller has a direction of rotation to pump fluid from the inlet to the outlet. This is a preferred direction of rotation, the blades of the impeller being particularly preferably shaped or bent in such a way that they can convey the fluid particularly efficiently from the inlet to the outlet in this direction of rotation of the impeller.
Es ist ein Zusatz-Auslass aus der Pumpenkammer vorgesehen samt einer Zusatz-Auslassklappe daran bzw. dafür. Die Zusatz-Auslassklappe weist eine Geschlossen-Stellung und mindestens eine Offen-Stellung auf. Zwischen diesen beiden Stellungen ist sie bewegbar, vorteilhaft drehbar ausgebildet, alternativ verbiegbar. Vorzugsweise ist sie dabei um eine Achse drehbar ausgebildet, ist also drehbar gelagert und nicht nur elastisch bewegbar und auslenkbar ausgebildet, beispielsweise durch Verbiegung oder Verwindung. In der Geschlossen-Stellung verschließt die Zusatz-Auslassklappe den Zusatz-Auslass, vorteilhaft weitgehend oder sogar vollständig. Dazu kann die Zusatz-Auslassklappe in etwa so groß sein wie der Zusatz-Auslass, vorteilhaft etwas größer sein. In jeder der Offen-Stellungen ist der Zusatz-Auslass zumindest teilweise offen bzw. die Zusatz-Auslassklappe gibt ihn zumindest teilweise frei oder öffnet ihn. Abhängig von der Offen-Stellung kann der Zusatz-Auslass also mehr oder weniger offen sein. Zusätzlich ist ein Stellmittel vorgesehen, wodurch die Zusatz-Auslassklappe derart kraftbelastet ist, dass sie selbsttätig aus der Geschlossen-Stellung in eine der Offen-Stellungen bewegt wird, wenn kein Fluid bzw. Wasser vom Einlass zum Auslass gepumpt wird bzw. wenn die Zusatz-Auslassklappe frei ist von Fluidströmung in Drehrichtung des Impellers zum Pumpen des Fluids im normalen Betrieb. Das Stellmittel kann also die Zusatz-Auslassklappe zumindest in die erste Offen-Stellung bzw. in die am wenigsten geöffnete Offen-Stellung bringen. Unter Umständen kann es also ausreichen, wenn die Stellmittel die Zusatz-Auslassklappe nur ein klein wenig öffnen.An additional outlet from the pump chamber is provided including an additional outlet flap on it or for it. The additional outlet flap has a closed position and at least one open position. Between these two positions it is movable, advantageously designed to be rotatable, or alternatively bendable. It is preferably designed to be rotatable about an axis, that is to say is rotatably mounted and is not only designed to be elastically movable and deflectable, for example by bending or twisting. In the closed position, the additional outlet flap closes the additional outlet, advantageously largely or even completely. For this purpose, the additional outlet flap can be approximately the same size as the additional outlet, advantageously somewhat larger. In each of the open positions, the additional outlet is at least partially open or the additional outlet flap at least partially releases or opens it. Depending on the open position, the additional outlet can therefore be more or less open. In addition, an adjusting means is provided, whereby the additional outlet flap is so force-loaded that it is automatically moved from the closed position to one of the open positions when no fluid or water is pumped from the inlet to the outlet or when the additional The outlet flap is free of fluid flow in the direction of rotation of the impeller for pumping the fluid during normal operation. The actuating means can therefore bring the additional outlet flap at least into the first open position or into the least open open position. Under certain circumstances it can therefore be sufficient if the actuating means open the additional outlet flap only a little.
Damit wird erreicht, dass in der Geschlossen-Stellung kein Fluid während des Pumpens durch den Zusatz-Auslass entweicht bzw. aus der Pumpenkammer gefördert wird. Schließlich soll das Fluid ja normal vom Einlass zum Auslass gefördert werden. Die Fluidströmung kann hier sogar noch helfen, die Zusatz-Auslassklappe in der Geschlossen-Stellung zu halten, da sie diese beispielsweise niederdrückt. Wenn keine Fluidströmung vorliegt, soll sich die Zusatz-Auslassklappe selbsttätig zumindest teilweise öffnen. Dann kann durch Drehrichtungsumkehr des Impellers, wie nachfolgend noch erläutert wird, in die zumindest teilweise geöffnete Zusatz-Auslassklappe gefördert werden bzw. an dieser vorbei in den nun zumindest teilweise offenen Zusatz-Auslass hinein und somit Fluid an einen anderen Abgang der Impellerpumpe, vorzugsweise zu einer Abflussleitung hin, gebracht werden.This ensures that, in the closed position, no fluid escapes through the additional outlet or is pumped out of the pump chamber during pumping. After all, the fluid should be conveyed normally from the inlet to the outlet. The fluid flow can even help to keep the additional outlet flap in the closed position, since it depresses it, for example. If there is no fluid flow, the additional outlet flap should automatically open at least partially. Then, by reversing the direction of rotation of the impeller, as will be explained below, at least partially into the opened additional outlet flap are conveyed or past this into the now at least partially open additional outlet and thus fluid can be brought to another outlet of the impeller pump, preferably to a drain line.
Durch die spezielle Ausbildung der Zusatz-Auslassklappe samt Stellmittel, die vorteilhaft passive Stellmittel sind, mit der selbsttätigen Öffnung kann auf speziell anzusteuernde Aktoren wie Elektromagnete, Piezo-Antriebe oder Elektromotoren verzichtet werden. Dies vereinfacht die Konstruktion der Impellerpumpe sowie deren Betrieb erheblich. Des Weiteren kann auch Bauraum eingespart werden.Due to the special design of the additional outlet flap including the actuating means, which are advantageously passive actuating means, with the automatic opening, actuators such as electromagnets, piezo drives or electric motors that need to be controlled specifically can be dispensed with. This considerably simplifies the construction of the impeller pump and its operation. Furthermore, installation space can also be saved.
In Ausgestaltung der Erfindung kann vorgesehen sein, dass die Zusatz-Auslassklappe durch die Stellmittel in diejenige Offen-Stellung aus der Gruppe der mehreren Offen-Stellungen bewegt werden kann, die maximal weit geöffnet ist und/oder in der sie maximal weit von der Geschlossen-Stellung entfernt ist. Damit kann erreicht werden, dass die Zusatz-Auslassklappe die Geschlossen-Stellung aufweist. Bei dieser Geschlossen-Stellung startend kann eine Bewegung vorgesehen sein zum Öffnen, bei der die Zusatz-Auslassklappe zuerst gering geöffnet ist, beispielsweise nach einer Drehung um nur wenige Grad Bogenwinkel. Das Stellmittel versucht aber, die Zusatz-Auslassklappe noch weiter zu öffnen, insbesondere sie maximal weit zu öffnen. Dann kann auch bei einer Umkehr der Drehrichtung des Impellers möglichst viel Fluid bzw. Wasser zum Zusatz-Auslass aus der Pumpenkammer gepumpt werden. Für diese maximal weit geöffnete Offen-Stellung kann gelten, dass sich hierzu die Zusatz-Auslassklappe um einen Winkel von 10° bis 45° gedreht hat, vorzugsweise 15° bis 30°. Strömt das Fluid bei der entgegengesetzten Haupt-Drehrichtung des Impellers, wenn also dessen Drehrichtung umgekehrt ist, hin zur offenen Zusatz-Auslassklappe und durch den Zusatz-Auslass hindurch, so kann durch die Zusatz-Auslassklappe eine besonders hohe Effizienz erreicht werden. Sie verschließt also nicht nur in der Geschlossen-Stellung den Zusatz-Auslass, sondern leitet in den Offen-Stellungen, insbesondere in der maximal weit geöffneten Offen-Stellung, das Fluid bei umgekehrter Drehrichtung des Impellers möglichst gut in den Zusatz-Auslass.In an embodiment of the invention, it can be provided that the additional outlet flap can be moved by the actuating means into that open position from the group of several open positions that is as wide as possible and / or in which it is as far as possible from the closed position. Position is removed. It can thus be achieved that the additional outlet flap is in the closed position. Starting in this closed position, a movement can be provided for opening, in which the additional outlet flap is initially slightly opened, for example after a rotation through only a few degrees of arc angle. However, the actuating means tries to open the additional outlet flap even further, in particular to open it as far as possible. Then, even if the direction of rotation of the impeller is reversed, as much fluid or water as possible can be pumped to the additional outlet from the pump chamber. For this maximally wide open open position it can apply that for this purpose the additional outlet flap has rotated through an angle of 10 ° to 45 °, preferably 15 ° to 30 °. If the fluid flows in the opposite main direction of rotation of the impeller, i.e. if its direction of rotation is reversed, towards the open additional outlet flap and through the additional outlet, a particularly high efficiency can be achieved by the additional outlet flap. It not only closes the additional outlet in the closed position, but also directs the fluid as well as possible into the additional outlet when the impeller is rotating in the opposite direction in the open position, in particular in the open position that is as wide as possible.
Für die Ausbildung der Stellmittel kann es mehrere Möglichkeiten geben. Vorteilhaft sind sie federnd ausgebildet bzw. weisen Federmittel als Stellmittel auf, um die Zusatz-Auslassklappe mit Kraft zu belasten, damit sie sich aus der Geschlossen-Stellung heraus bewegt. Die Federmittel sollten derart eingebaut sein, dass sie eine Fluidströmung möglichst wenig behindern.There can be several possibilities for the formation of the actuating means. They are advantageously designed to be resilient or have spring means as adjusting means in order to load the additional outlet flap with force so that it moves out of the closed position. The spring means should be installed in such a way that they impede a fluid flow as little as possible.
Als Federmittel können einerseits vorteilhaft Kunststoff-Federmittel verwendet werden. Diese weisen den Vorteil auf, dass sie bei permanentem Kontakt mit Wasser nicht korrodieren. Derartige Federmittel können vorteilhaft einen voluminösen Block-Körper aufweisen, der besonders vorteilhaft zylindrische Form aufweisen kann. So kann das Federmittel beispielsweise die Form eines Quaders haben und aus elastischem Material bestehen, insbesondere eben Kunststoff. Als Kunststoff bietet sich hier Silikon an, unter Umständen auch Gummi.On the one hand, plastic spring means can advantageously be used as the spring means. These have the advantage that they do not corrode in permanent contact with water. Such spring means can advantageously have a voluminous block body, which can particularly advantageously have a cylindrical shape. For example, the spring means can have the shape of a cuboid and consist of elastic material, in particular plastic. A suitable plastic here is silicone, and possibly also rubber.
Als Alternative zu einem Kunststoff-Federmittel kann andererseits eine übliche Feder verwendet werden, also beispielsweise eine Blattfeder, eine Schraubenfeder, eine Spiralfeder oder eine kombinierte Schraub-Spiralfeder. So kann beispielsweise eine Feder auch um eine Drehachse gewickelt sein und durch Verdrehen bzw. Tordieren ein Drehmoment aufbauen, das dann eben versucht, die Zusatz-Auslassklappe zu öffnen.As an alternative to a plastic spring means, on the other hand, a conventional spring can be used, for example a leaf spring, a helical spring, a spiral spring or a combined helical spiral spring. For example, a spring can also be wound around an axis of rotation and, through twisting or twisting, build up a torque which then tries to open the additional outlet flap.
Als nochmals weitere Alternative kann die Zusatz-Auslassklappe selbst weich oder elastisch sein bzw. aus derart elastischem Material bestehen, insbesondere einem Elastomer, dass sie selbst das Stellmittel bzw. das Federmittel bildet, durch das sie geöffnet wird. Dann ist also sozusagen die Feder bzw. die Federwirkung in die Zusatz-Auslassklappe integriert. Sie kann in einer normalen Stellung ohne Fluidströmung leicht geöffnet sein, also in einer relativ gering geöffneten Offen-Stellung sein. Je nach Strömungsrichtung wird sie dann weiter aufgedrückt oder zugedrückt bzw. in die Geschlossen-Stellung gedrückt, verschließt also den Zusatz-Auslass.As yet another alternative, the additional outlet flap itself can be soft or elastic or consist of such an elastic material, in particular an elastomer, that it itself forms the adjusting means or the spring means by which it is opened. The spring or the spring action is then integrated into the additional outlet flap, so to speak. It can be slightly open in a normal position without fluid flow, that is to say in a relatively slightly open open position. Depending on the direction of flow, it is then pushed open or closed or pushed into the closed position, thus closing the additional outlet.
In Ausgestaltung der Erfindung kann die Pumpe Dichtmittel am Zusatz-Auslass und/oder an der Zusatz-Auslassklappe aufweisen. Vorteilhaft sind diese um den Zusatz-Auslass herum umlaufend ausgebildet, zumindest aber entlang einer Seite, beispielsweise nahe zum Impeller hin. So kann die Zusatz-Auslassklappe relativ einfach gehalten sein. Es kann vorgesehen sein, ein Dichtmittel an das Pumpengehäuse anzuspritzen, wofür sich besonders vorteilhaft ein Mehrkomponenten-Spritzgussverfahren eignet. Dies ist vor allem dann von Vorteil, wenn das Dichtmittel eine Art Dichtlippe, Rundschnurdichtung odgl. ist. Dann können die Dichtmittel nämlich auch einen Dichtgummi aufweisen, der durch seine Elastizität für eine Dichtwirkung in der Geschlossen-Stellung sorgt. Diese Dichtmittel können auch durch vorgenannte Ausbildung der Zusatz-Auslassklappe aus elastischem Material gebildet sein, so dass die Klappe selbst auch ausreichend dichtet durch ihr weiches Material.In an embodiment of the invention, the pump can have sealing means on the additional outlet and / or on the additional outlet flap. These are advantageously designed to run around the additional outlet, but at least along one side, for example close to the impeller. The additional outlet flap can thus be kept relatively simple. Provision can be made for a sealant to be injected onto the pump housing, for which a multi-component injection molding process is particularly advantageously suitable. This is particularly advantageous when the sealant has a type of sealing lip, round cord seal or the like. is. The sealing means can then namely also have a sealing rubber which, due to its elasticity, ensures a sealing effect in the closed position. These sealing means can also be formed by the aforementioned design of the additional outlet flap made of elastic material, so that the flap itself also seals sufficiently due to its soft material.
Alternativ zu einem Dichtmittel aus elastischem Material kann auch eine Labyrinth-Dichtung vorgesehen sein zwischen Zusatz-Auslassklappe und dem Rand des Zusatz-Auslasses, an dem oder nahe dem die Klappe verläuft. Eine solche Labyrinth-Dichtung kann einen stufigen Verlauf einer Dichtfläche zwischen Zusatz-Auslass und Zusatz-Auslassklappe aufweisen, beispielsweise mit ein bis drei Winkelstufen. Dann ist möglicherweise eine Dichtwirkung nicht ganz so gut wie bei einer elastischen Gummidichtung, sie reicht aber aus für den Betrieb der Impellerpumpe.As an alternative to a sealing means made of elastic material, a labyrinth seal can also be provided between the additional outlet flap and the edge of the additional outlet on or near which the flap runs. Such a labyrinth seal can have a stepped course of a sealing surface between the additional outlet and the additional outlet flap, for example with one to three angular steps. In this case, the sealing effect may not be as good as that of an elastic rubber seal, but it is sufficient for the impeller pump to operate.
Erfindungsgemäß ist vorgesehen, dass die Zusatz-Auslassklappe in der Geschlossen-Stellung den Betrieb der Pumpe und einen Wirkungsgrad der Pumpe möglichst wenig negativ beeinträchtigt. So sollte sie auch möglichst wenig oder am besten gar keinen zusätzlichen Strömungswiderstand darstellen, wenn der Impeller Fluid vom Einlass zum Auslass der Pumpenkammer pumpt.According to the invention it is provided that the additional outlet flap in the closed position negatively affects the operation of the pump and the efficiency of the pump as little as possible. It should also have as little or no additional flow resistance as possible represent when the impeller is pumping fluid from the inlet to the outlet of the pump chamber.
Dann ist sie also sozusagen gar nicht vorhanden. Dazu ist erfindungsgemäß vorgesehen, dass die Zusatz-Auslassklappe in der Geschlossen-Stellung den Verlauf der Pumpenkammer oder einer Wandung der Pumpenkammer in diesem Bereich um die Klappe herum stetig fortsetzt, wobei insbesondere auch Rundungen und/oder Wölbungen entsprechend dem den Zusatz-Auslass umgebenden Bereich der Pumpenkammer die Ausgestaltung der Zusatz-Auslassklappe zumindest an deren Außenseite bestimmen. Ist der umgebende Bereich der Pumpenkammer flach, dann kann auch die Auslassklappe an der Außenseite flach ausgebildet sein. Somit soll in der Geschlossen-Stellung die Pumpenkammer, insbesondere ihre Wandung, eine Form aufweisen als ob es die Zusatz-Auslassklappe gar nicht gäbe.In that case, so to speak, it does not exist at all. For this purpose, it is provided according to the invention that the additional outlet flap in the closed position continues the course of the pump chamber or a wall of the pump chamber in this area around the flap, in particular also curves and / or bulges corresponding to the area surrounding the additional outlet of the pump chamber determine the design of the additional outlet flap at least on its outside. If the surrounding area of the pump chamber is flat, then the outlet flap can also be designed to be flat on the outside. Thus, in the closed position, the pump chamber, in particular its wall, should have a shape as if the additional outlet flap did not even exist.
Bei der Erfindung weist die Zusatz-Auslassklappe eine Innenseite auf, die in der Geschlossen-Stellung zum Zusatz-Auslass hin weist. Sie weist also von der Pumpenkammer weg, während die vorgenannte Außenseite der Zusatz-Auslassklappe vor allem in der Geschlossen-Stellung den Zusatz-Auslass verdeckt bzw. diejenige Fläche ist, an der das Fluid beim Pumpen vom Einlass zum Auslass entlang- und vorbeiströmt. Die Innenseite kann vorteilhaft konvex gewölbt sein, und zwar konvex weg von dem Zusatz-Auslass bzw. hin zur Pumpenkammer gewölbt sein. Durch diese spezielle Form soll erreicht werden, dass in der Offen-Stellung der Zusatz-Auslassklappe bzw. der maximal weit geöffneten Offen-Stellung das Fluid, das bei der umgekehrten Drehrichtung des Impellers durch die geöffnete Zusatz-Auslassklappe in den Zusatz-Auslass hinein strömt, möglichst schnell und effizient in den Zusatz-Auslass hinein strömt. Durch diese Wölbung soll das gepumpte Fluid also möglichst gut sozusagen eingefangen und in den Zusatz-Auslass geleitet werden.In the invention, the additional outlet flap has an inside which, in the closed position, points towards the additional outlet. It therefore faces away from the pump chamber, while the aforementioned outside of the additional outlet flap covers the additional outlet or is the surface on which the fluid flows from inlet to outlet during pumping, especially in the closed position. The inside can advantageously be convexly curved, namely convexly away from the additional outlet or towards the pump chamber. This special shape is intended to ensure that in the open position of the additional outlet flap or the maximum open position, the fluid that flows through the opened additional outlet flap into the additional outlet when the impeller rotates in the opposite direction flows into the additional outlet as quickly and efficiently as possible. Through this curvature, the pumped fluid should be captured as well as possible, so to speak, and directed into the additional outlet.
Vorteilhaft kann an der Innenseite der Zusatz-Auslassklappe eine Lateralwand vorgesehen sein, welche einen Winkel zwischen 60° und 120° zur Außenseite aufweist. Wenn die Außenseite flach ist oder weitgehend flach ist, kann dieser Winkel auch zwischen 80° und 100° liegen. Er kann besonders vorteilhaft 90° oder etwas weniger betragen.A lateral wall can advantageously be provided on the inside of the additional outlet flap, which has an angle between 60 ° and 120 ° to the outside. If the outside is flat or is largely flat, this angle can also be between 80 ° and 100 °. It can particularly advantageously be 90 ° or a little less.
Es kann vorgesehen sein, dass die genannte Lateralwand niemals vollständig aus der Öffnung des Zusatz-Auslasses herausbewegt wird im Betrieb der Pumpe. Dazu kann ein Anschlag vorgesehen sein, vorteilhaft an der Lateralwand selbst, der an einem Innenrand der Zusatz-Auslasses anschlagen kann. Bevorzugt kann die Lateralwand einen Längsaußenrand aufweisen, der in der maximal weit geöffneten Offen-Stellung über einen Großteil seiner Länge in einer Richtung weg von der Drehachse der Zusatz-Auslassklappe, insbesondere über seine ganze Länge, innerhalb des Zusatz-Auslasses verläuft. Dadurch kann einerseits eine gewisse Führung der Zusatz-Auslassklappe erreicht werden bzw. eine Abstützung in den Offen-Stellungen und vor allem auch in der maximal weit geöffneten Offen-Stellung. Dies verhindert ein Beschädigen der Zusatz-Auslassklappe und auch bereits ein Verbiegen oder Verformen, wenn Fluid vom Impeller entgegen seiner Haupt-Drehrichtung vom Einlass in die Pumpenkammer zum Zusatz-Auslass hinausgepumpt werden soll. Andererseits kann so erreicht werden, dass in diesem Bereich sozusagen kein Fluid zwischen Lateralwand und Zusatz-Auslass entweichen und am Zusatz-Auslass vorbeiströmen kann.It can be provided that said lateral wall is never completely moved out of the opening of the additional outlet when the pump is in operation. For this purpose, a stop can be provided, advantageously on the lateral wall itself, which can hit an inner edge of the additional outlet. The lateral wall can preferably have a longitudinal outer edge which, in the maximally wide open position, runs over a large part of its length in a direction away from the axis of rotation of the additional outlet flap, in particular over its entire length, within the additional outlet. In this way, on the one hand, a certain guidance of the additional outlet flap can be achieved or a support in the open positions and especially in the fully open position. This prevents damage to the additional outlet flap and also prevents it from bending or deforming if the impeller is to pump out fluid from the inlet into the pump chamber to the additional outlet, counter to its main direction of rotation. On the other hand, it can be achieved in this way that in this area, so to speak, no fluid can escape between the lateral wall and the additional outlet and flow past the additional outlet.
An der Lateralwand kann ein Vorsprung odgl. für den vorgenannten Anschlag vorgesehen sein, insbesondere an dem genannten freien Längsaußenrand der Lateralwand, besonders bevorzugt möglichst weit entfernt von der Drehachse der Zusatz-Auslassklappe, der eben den Anschlag am Pumpengehäuse bzw. an der Wand der Pumpenkammer bildet. Dadurch ist die maximal weit geöffnete Offen-Stellung genau begrenzt. So kann eine zu weite Öffnung vermieden werden, die strömungstechnisch möglicherweise nicht mehr günstig wäre. Ebenso kann ein Herausreißen der Zusatz-Auslassklappe verhindert werden.A projection or the like can be provided on the lateral wall. be provided for the aforementioned stop, in particular on the named free longitudinal outer edge of the lateral wall, particularly preferably as far away as possible from the axis of rotation of the additional outlet flap, which just forms the stop on the pump housing or on the wall of the pump chamber. As a result, the maximum wide open open position is precisely limited. In this way, an opening that is too wide can be avoided, which would possibly no longer be favorable in terms of flow. The additional outlet flap can also be prevented from being torn out.
Vorteilhaft kann vorgesehen sein, dass die Lateralwand parallel zu einer umlaufenden Außenwand der Pumpenkammer verläuft. Die Lateralwand kann also auch gebogen sein in ihrem Längsverlauf weg von der Drehachse der Zusatz-Auslassklappe.It can advantageously be provided that the lateral wall runs parallel to a circumferential outer wall of the pump chamber. The lateral wall can therefore also be curved in its longitudinal course away from the axis of rotation of the additional outlet flap.
In einer maximal weit geöffneten Offen-Stellung der Zusatz-Auslassklappe, bevorzugt in jeder Offen-Stellung, kann die Lateralwand mit einem Abstand zu einer umlaufenden Außenwand der Pumpenkammer verlaufen, der zwischen 0,5 cm und 2 cm liegt. Dies bedeutet, dass die Lateralwand einen relativ geringen Abstand zur Außenwand der Pumpenkammer aufweisen kann, dieser Abstand aber schon noch gegeben ist. Dies ist besonders dann vorteilhaft, wenn die Impellerpumpe eine beheizte Außenwand der Pumpenkammer aufweist. Außerdem muss die Zusatz-Auslassklappe ja noch in dem vorhandenen Bauraum in der Pumpenkammer integriert werden.In a maximally wide open open position of the additional outlet flap, preferably in every open position, the lateral wall can extend at a distance from a circumferential outer wall of the pump chamber that is between 0.5 cm and 2 cm. This means that the lateral wall can have a relatively small distance from the outer wall of the pump chamber, but that this distance is already given. This is particularly advantageous when the impeller pump has a heated outer wall of the pump chamber. In addition, the additional outlet flap still has to be integrated into the existing installation space in the pump chamber.
Bei der Erfindung verläuft die Pumpenkammer ringförmig um den Impeller herum. Der Zusatz-Auslass ist dabei in einer ringförmigen Endfläche der Pumpenkammer in axialer Richtung entlang der Drehachse des Impellers angeordnet. Dies ist eine Bodenfläche oder eine Deckelfläche der Pumpenkammer. Eine solche Endfläche ist derart angeordnet, dass sie in etwa in einer Ebene einer der beiden Deckflächen des Impellers verläuft. Besonders vorteilhaft kann vorgesehen sein, dass diese Endfläche entfernt vom Auslass aus der Pumpenkammer ist, siehe die
Die Anordnung des Zusatz-Auslasses in einer Endfläche der Pumpenkammer, die in einer Ebene von einer der beiden Deckflächen des Impellers verläuft, weist den Vorteil auf, dass beim Pumpen von Fluid mit Drehrichtung des Impellers zum Pumpen aus dem Zusatz-Auslass heraus das zwischen den beiden Deckflächen des Impellers herausströmende Fluid relativ direkt zum Zusatz-Auslass strömen kann. Da die Zusatz-Auslassklappe in der maximal weit geöffneten Offen-Stellung nahe am Impeller liegt, insbesondere in radialer Richtung, beispielsweise mit maximal 1 cm radialem Abstand, kann ebenfalls Fluid möglichst gut zum Zusatz-Auslass herausgepumpt werden.The arrangement of the additional outlet in an end surface of the pump chamber, which runs in a plane of one of the two top surfaces of the impeller, has the advantage that when pumping fluid with the direction of rotation of the impeller for pumping out of the additional outlet, the between the Fluid flowing out of both top surfaces of the impeller can flow relatively directly to the additional outlet. Since the additional outlet flap is close to the impeller in the fully open position, in particular in the radial direction, for example with a maximum radial distance of 1 cm, fluid can also be pumped out to the additional outlet as well as possible.
Bei der Erfindung ist eine vorgenannte Innenseite der Zusatz-Auslassklappe in etwa auf axialer Höhe und radial außerhalb der anderen Deckfläche des Impellers, und zwar so, dass Fluid aus dem Impeller direkt in radialer Richtung nach außen in die Zusatz-Auslassklappe und damit in den Zusatz-Auslass strömt. So bildet sich eine Art Strömungskanal für das Fluid zwischen der Endfläche der Pumpenkammer, in der die Zusatz-Auslassklappe vorgesehen ist, und der Zusatz-Auslassklappe selbst bzw. deren zuvor beschriebener Innenseite. Diese beiden Flächen können dann in etwa mit der Ebene übereinstimmen, in der die vorgenannten Deckflächen des Impellers verlaufen, wodurch ein Pumpen von Fluid aus dem Zusatz-Auslass heraus möglichst gut erfolgen kann.In the invention, an aforementioned inside of the additional outlet flap is approximately at the axial height and radially outside the other top surface of the impeller, in such a way that fluid from the impeller is directed radially outward into the additional outlet flap and thus into the additive -Outlet flows. A type of flow channel for the fluid is thus formed between the end surface of the pump chamber in which the additional outlet flap is provided and the additional outlet flap itself or its previously described inside. These two surfaces can then roughly coincide with the plane in which the aforementioned top surfaces of the impeller run, so that fluid can be pumped out of the additional outlet as well as possible.
Der Zusatz-Auslass kann in Ausgestaltung der Erfindung aus der Pumpenkammer in radialer Richtung oder in einer Ebene senkrecht zu einer Drehachse des Impellers herausführen. Vorteilhaft führt der Zusatz-Auslass dann auch aus einem gesamten Gehäuse der Impellerpumpe heraus, beispielsweise an einem Rohrstutzen, der gut geeignet ist zum Anschluss von Wasserleitungen bzw. Schläuchen, insbesondere elastischen Schläuchen.In an embodiment of the invention, the additional outlet can lead out of the pump chamber in the radial direction or in a plane perpendicular to an axis of rotation of the impeller. The additional outlet then advantageously also leads out of an entire housing of the impeller pump, for example on a pipe socket which is well suited for connecting water lines or hoses, in particular elastic hoses.
Allgemein ist vorgesehen, dass die Zusatz-Auslassklappe vom gepumpten Fluid während der Haupt-Drehrichtung des Impellers niedergehalten und somit in der Geschlossen-Stellung gehalten wird, so dass der Zusatz-Auslass geschlossen ist, vorzugsweise nur vom gepumpten Fluid. So wird erreicht, dass nach Aufhören des Drehens des Impellers oder bei geringen Drehzahlen und somit geringer Fluidströmung das zuvor genannte Stellmittel die Zusatz-Auslassklappe von der Geschlossen-Stellung während des Pumpens des Fluids in eine Offen-Stellung drückt. Vorteilhaft kann das Stellmittel versuchen, die Zusatz-Auslassklappe in die maximal weit geöffnete Offen-Stellung zu drücken, wobei dies nicht sein muss. Bereits das Öffnen der Zusatz-Auslassklappe mit geringem Öffnungsweg kann als ausreichend angesehen werden, wenn nämlich dann das von dem Impeller in der anderen Drehrichtung bewegte Fluid die Zusatz-Auslassklappe vollständig öffnet bzw. in die maximal weit geöffnete Stellung aufdrückt. Die Federmittel können also in diesem Fall für eine gewisse, relativ gering geöffnete Offen-Stellung sorgen. Das vollständige Öffnen der Zusatz-Auslassklappe wird dann durch die Strömung des Fluids bei Pumprichtung zum Herauspumpen aus der Pumpe bewirkt.It is generally provided that the additional outlet flap is held down by the pumped fluid during the main direction of rotation of the impeller and thus held in the closed position so that the additional outlet is closed, preferably only by the pumped fluid. In this way it is achieved that after the impeller has stopped rotating or at low Speeds and thus low fluid flow, the aforementioned actuating means presses the additional outlet flap from the closed position during the pumping of the fluid into an open position. The actuating means can advantageously try to push the additional outlet flap into the open position, which is open to the maximum extent, but this does not have to be the case. Even the opening of the additional outlet flap with a small opening path can be regarded as sufficient, namely if the fluid moved by the impeller in the other direction of rotation opens the additional outlet flap completely or pushes it open into the maximally wide open position. In this case, the spring means can therefore ensure a certain, relatively slightly open, open position. The complete opening of the additional outlet flap is then brought about by the flow of the fluid in the pumping direction for pumping out of the pump.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen schematisch dargestellt und werden im Folgenden näher erläutert. In den Zeichnungen zeigen:
- Fig. 1
- eine Schrägansicht einer erfindungsgemäßen Impellerpumpe im geschlossenen Zustand,
- Fig. 2
- eine Ansicht in ein Pumpengehäuse der Impellerpumpe aus
Fig. 1 von einem Antriebsteil aus gesehen, - Fig. 3
- eine teilgeschnittene Schrägansicht in eine Pumpenkammer mit Kammerwandung und Bodenfläche, über der ein Impeller rotiert, und mit einer daneben angeordneten Zusatz-Auslassöffnung ohne Klappe,
- Fig. 4
- die Ansicht aus
Fig. 3 mit eingesetzter Zusatz-Auslassklappe in Geschlossen-Stellung, - Fig. 5 und 6
- zwei verschiedene Ansichten der Zusatz-Auslassklappe aus
Fig. 4 , - Fig. 7
- die Darstellung der
Fig. 4 mit der Zusatz-Auslassklappe in der maximal weit geöffneten Offen-Stellung, - Fig. 8
- die Darstellung der
Fig. 7 gedreht in Seitenansicht - Fig. 9
- ein Ausführungsbeispiel einer vereinfacht dargestellten Zusatz-Auslassklappe mit einem separaten Federmittel in einer Pumpenkammer in der Bodenfläche und
- Fig. 10
- ein Ausführungsbeispiel einer vereinfacht dargestellten Zusatz-Auslassklappe, die selber federnd ausgebildet ist, in einer Pumpenkammer in der Bodenfläche.
- Fig. 1
- an oblique view of an impeller pump according to the invention in the closed state,
- Fig. 2
- a view into a pump housing of the impeller pump
Fig. 1 seen from a drive part, - Fig. 3
- a partially sectioned oblique view into a pump chamber with chamber wall and bottom surface, above which an impeller rotates, and with an additional outlet opening arranged next to it without a flap,
- Fig. 4
- the view
Fig. 3 with inserted additional outlet flap in closed position, - Figures 5 and 6
- two different views of the additional outlet flap
Fig. 4 , - Fig. 7
- the representation of the
Fig. 4 with the additional outlet flap in the fully open position, - Fig. 8
- the representation of the
Fig. 7 rotated in side view - Fig. 9
- an embodiment of a simplified illustrated additional outlet flap with a separate spring means in a pump chamber in the bottom surface and
- Fig. 10
- an embodiment of a simplified illustrated additional outlet flap, which itself is designed to be resilient, in a pump chamber in the bottom surface.
In der
In der
Genauer zu erkennen ist der Aufbau aus der
Der Impeller 30 weist eine Bodenscheibe 32 und eine Deckscheibe 33 als Deckflächen auf. Später in der
Im normalen Betrieb der Pumpe 11 zum Fördern von Fluid, das durch den Einlass 14 eintritt, hinaus zum Auslass 16 dreht sich der Impeller 30 nach rechts bzw. im Uhrzeigersinn in der mit einem dicken Pfeil dargestellten Förderrichtung FR. Das geförderte Fluid bzw. Wasser dreht sich dann in dieser Richtung innerhalb der Kammerwandung 24 bzw. läuft um und kann gegebenenfalls erhitzt werden. Es tritt dann an einem von der Bodenfläche 29 entfernten Endbereich wieder aus der Pumpenkammer 22 aus in tangentialer Richtung, und zwar durch den Auslass 16.During normal operation of the
Wird nun der Impeller 30 andersherum angetrieben, nämlich in der Entleer-Richtung ER, die durch einen dünnen Pfeil dargestellt ist, so wird Fluid, das durch den Einlass 14 einströmen kann, möglichst nicht zum Auslass 16 hinausgefördert. Vielmehr soll dieses Fluid dann durch eine Zusatz-Auslassöffnung 39 hin zum Zusatz-Auslass 37 gefördert werden aus der Pumpenkammer 22 heraus. Der Zusatz-Auslass 37 kann dabei an eine Abwasserleitung oder einen Abwasserschlauch aus einem wasserführenden Haushaltsgerät führen, in welches die Pumpe 11 eingebaut ist, und von dort aus zu einem Abfluss bzw. einer Abflussleitung im Haus.If the
In der Darstellung der
Auch wenn hier nur eine einzige Zusatz-Auslassöffnung 39 dargestellt ist, so könnten es doch auch mehrere sein, beispielsweise zwei oder drei. Anstelle jeweils eines einzelnen Zusatz-Auslassstutzens könnten diese Zusatz-Auslassöffnungen dann jeweils in einen Ringraum führen, der von vorne an die Bodenfläche 29 sozusagen angesetzt ist. Aus diesem Ringraum heraus kann dann ein einziger Stutzen geführt sein, so dass ein Anschluss einfacher möglich ist.Even if only a single additional outlet opening 39 is shown here, it could also be several, for example two or three. Instead of a single additional outlet connection, these additional outlet openings could then each lead into an annular space, which is attached to the
In der
Die Zusatz-Auslassklappe 44 weist eine Außenseite 45 auf, welche eine Fortsetzung der sie umgebenden Flächen der Pumpenkammer 22 ist. Da die Zusatz-Auslassöffnung 39 vollständig innerhalb der planen ringförmigen Bodenfläche 29 liegt, ist diese Außenseite 45 ebenfalls plan und steht nicht über diese Bodenfläche 29 über. Da hier die Kammerwandung 24 ein separates eigenes Bauteil ist und insbesondere aus Metall besteht wegen der außen angebrachten Heizleiter, ist eine Integration der Zusatz-Auslassklappe 44 in die Kehle bzw. den Übergangsbereich zwischen Bodenfläche 29 und Kammerwandung 24 nicht möglich. Theoretisch wäre dies aber denkbar und an sich auch leicht ausführbar.The
Die Lagerung der Zusatz-Auslassklappe 44 an der Zusatz-Auslassöffnung 39 erfolgt mittels zweier angeformter kurzer Achsstummel 48, die in den Achslagervertiefungen 40 liegen. Unter Umständen können sie dabei durch Rastmittel darin gehalten werden, beispielsweise durch mehr als 180° umlaufende Achslagervertiefungen, so dass sie nicht von alleine herausspringen und die Zusatz-Auslassklappe 44 möglicherweise verloren geht.The
Wie die Förderrichtung FR zeigt, strömt das aus dem Impeller 30 austretende Fluid beim normalen Fördern von Fluid in rotierender Richtung rechts herum derart über die Zusatz-Auslassklappe 44, dass diese bzw. ihre Außenseite 45 heruntergedrückt wird, wodurch die Zusatz-Auslassöffnung 39 verschlossen ist. Dieser Verschluss ist zwar nicht unbedingt vollständig wasserdicht, insbesondere wenn Fluiddruck anliegen würde. Dies ist im normalen Betrieb zum Fördern von Fluid aber auch nicht notwendig, da das Fluid ja aus dem Impeller 30 austretend in rechts herum rotierender Bewegung einige wenige Male innerhalb der Pumpenkammer 22 umläuft, bis es zum Auslass 16 wieder austritt.As the conveying direction FR shows, during normal conveying of fluid in a rotating direction to the right, the fluid exiting from the
In den
Vorne unten an der Lateralwand 50 ist gestrichelt dargestellt ein optional vorgesehener Vorsprung 54 zu erkennen. Dieser kann unter einen vorderen Rand der Zusatz-Auslassöffnung 39 greifen beim Aufschwenken bzw. beim Schwenken der Zusatz-Auslassklappe 44 nach oben, also auf die maximal weit geöffnete Offen-Stellung zu. Durch Anschlagen dieses Vorsprungs 54 unterhalb der Bodenfläche 29 kann diese maximal weit geöffnete Offen-Stellung definiert bzw. erreicht werden. Da dabei der Vorsprung 54 nicht innerhalb des direkten Fluidstroms angeordnet ist, stört er strömungstechnisch auch nicht. Des Weiteren ist die Lateralwand 50 stets innerhalb der Zusatz-Auslassöffnung 39 für eine gute Einleitung des Fluids darin hinein.At the front at the bottom of the
Als erfindungsgemäßes Stellmittel zum Öffnen der Zusatz-Auslassklappe 44 mit Schwenken um die Drehachse durch die Achsstummel 48 könnten unterschiedliche Federmittel vorgesehen sein, beispielsweise bekannte Torsionsfedern nach Art einer Schraubenfeder mit ein oder zwei Umdrehungen und sehr langen freien Schenkeln. Diese könnten sich einerseits an der Innenseite 46 abstützen und andererseits unten unterhalb der Zusatz-Auslassöffnung 39. Ebenso könnte an den linken Rand der Zusatz-Auslassklappe 44, beispielsweise im Bereich zum Stufenrand 42 hin, ein eingangs genannter blockförmiger Körper aus federndem Kunststoff bzw. Schaumstoff vorgesehen sein. Ebenso könnte dies an der Unterkante der Lateralwand 50 vorgesehen sein, wo diese in der Geschlossen-Stellung gemäß
Die Darstellung der
Des Weiteren wird aber auch in der Umlaufrichtung ER umlaufendes Fluid aus diesem Umlauf heraus sozusagen von der Zusatz-Auslassklappe 44 eingefangen und zum Zusatz-Auslassstutzen 37 herausgeleitet. Das Vorsehen mehrerer solcher Zusatz-Auslassklappen in der Pumpenkammer 22 könnte diesen Effekt natürlich verstärken, so dass ein Abpumpen oder Entleeren noch schneller erfolgen könnte. Gleichzeitig bedeutet dies natürlich größeren baulichen Aufwand sowie zahlreichere mögliche Versagensstellen im Fall von Materialbruch oder Problemen.Furthermore, however, fluid circulating in the direction of rotation ER is also captured from this circulation, so to speak, by the
Gemäß
Die eingangs genannte konvexe Wölbung der Zusatz-Auslassklappe 44 an ihrer Innenseite 46 wird durch den Winkel α zwischen der Fläche bzw. der Außenseite 45 und der Lateralwand 50 gebildet, wobei hier gilt α = ca. 80°. Gerade im Innenbereich zwischen Innenseite 46 und Innenfläche 51 könnte eine Rundung bzw. eine Kehle vorgesehen sein. Dies könnte strömungstechnisch Vorteile bilden, muss aber nicht so sein.The aforementioned convex curvature of the
Der Abstand in radialer Richtung zwischen dem Impeller 30 und der Zusatz-Auslassklappe 44 bzw. deren gerundeter, radialer Innenkante ist, wie die
In der
Es ist leicht zu erkennen, dass in der in
Aus einem Vergleich der Darstellungen in der
Es stellt kein nennenswertes Problem dar, die Federkraft der Blattfeder 159 entsprechend auszugestalten. Hierfür kann entsprechend dünnes Material für die Blattfeder 159 vorgesehen sein, alternativ können auch seitliche Einschnitte odgl. vorgesehen sein.It is not a significant problem to design the spring force of the
Eine Befestigung der Blattfeder 159 wird als vorteilhaft angesehen, besonders vorteilhaft eben durch Einstecken oben in die Federaufnahme 156. In Abwandlung der Darstellung der
In nochmals weiterer, hier nicht dargestellter Ausgestaltung könnte um eine Achse entsprechend den Achsstummeln 148 als Stellmittel eine Schraubenfeder aus Federdraht mit lange abstehenden Schenkeln angeordnet sein, die die Zusatz-Auslassklappe 144 aufdrückt und sich dabei an derselben Innenwand der Zusatz-Auslassöffnung 139 abstützt. Dann wäre eben eine solche Feder, deren Bauart grundsätzlich bekannt ist zum Aufdrücken oder Zudrücken mittels Drehmoment, an diesen Achsstummeln oder einer entsprechenden Drehachse befestigt.In yet another embodiment, not shown here, a helical spring made of spring wire with long protruding legs could be arranged around an axis corresponding to the
Eine nochmals weitere Ausgestaltung ist in der
Gestrichelt dargestellt in der
In der
Der Vorteil einer solchen Zusatz-Auslassklappe 244 gemäß der
In nochmals weiterer Ausgestaltung der Erfindung könnte ausgehend von der
Claims (12)
- Impeller pump (11) having- a pump chamber (22, 122, 222) with an inlet (14) into the pump chamber and with an outlet (16) out of the pump chamber,- an impeller (30) in the pump chamber (22, 122, 222),wherein the impeller has a direction of rotation (FR) for pumping fluid from the inlet (14) to the outlet (16), and wherein the pump chamber (22) is formed in a ring-shaped fashion around the impeller (30),- an auxiliary outlet (37) out of the pump chamber together with an auxiliary outlet flap (44, 144, 244),wherein the auxiliary outlet flap (44, 144, 244):- has a closed position and at least one open position,- is designed to be movable between the closed position and the at least one open position,- in the closed position, closes off the auxiliary outlet (37) and, in each of the open positions, at least partially unblocks or opens the auxiliary outlet,- has an actuating means (159, 244) and is subjected to force loading by the actuating means such that the auxiliary outlet flap (44, 144, 244) is moved automatically from the closed position into one of the open positions if the auxiliary outlet flap is free from fluid flow in the direction of rotation (FR) of the impeller for pumping fluid from the inlet (14) to the outlet (16),- in the closed position, forms a continuous continuation of the profile of the pump chamber (22) or of a wall (24, 29, 129, 229) of the pump chamber in the region around the auxiliary outlet (37),- has an inner side (46, 146, 246) which, in the closed position, points toward the auxiliary outlet (37),characterized in that- the auxiliary outlet (37) is arranged in an end surface (29, 129, 229) of the pump chamber in an axial direction along an axis of rotation of the impeller (30), wherein the end surface is a base surface (29, 129, 229) or a cover surface of the pump chamber (22),- an outer side (45, 145, 245) opposite to the inner side (46, 146, 246) of the auxiliary outlet flap (44, 144, 244) extends, in the closed position, in a continuous fashion in said end surface (29, 129, 229),- the impeller (30) has two cover surfaces (32, 33), and the end surface (29, 129, 229) with the auxiliary outlet (37) runs approximately in a plane of one of said cover surfaces (32),- the auxiliary outlet flap (44, 144, 244), in an open position with the maximum degree of opening, is situated close to the impeller (30), and the inner side of the auxiliary outlet flap (44, 144, 244) is at least on the axial level of and radially outside the other cover surface (33) of the impeller (30), such that fluid flows out of the impeller (30) directly outward in a radial direction into the auxiliary outlet flap (44, 144, 244) and the auxiliary outlet (37).
- Impeller pump according to claim 1, characterized in that the auxiliary outlet flap (44, 144, 244) is moved by the actuating means (159, 244) into that open position of the multiple open positions which has the maximum degree of opening and/or in which the auxiliary outlet flap is at the maximum distance from the closed position.
- Impeller pump according to claim 1 or 2, characterized in that the impeller pump has spring means (159, 244) as actuating means for subjecting the auxiliary outlet flap (44, 144, 244) to force loading for the movement.
- Impeller pump according to claim 3, characterized in that the spring means (244) has a voluminous block body.
- Impeller pump according to claim 3, characterized in that the spring means is a leaf spring (159), helical spring, spiral spring or helical-spiral spring.
- Impeller pump according to any of the preceding claims, characterized in that the pump (11) has sealing means (42) at the auxiliary outlet (37) surrounding the auxiliary outlet.
- Impeller pump according to claim 6, characterized in that the sealing means are formed as a labyrinth seal (42) with a stepped profile of a sealing surface between the auxiliary outlet (37) and the auxiliary outlet flap (44).
- Impeller pump according to any of the preceding claims, characterized in that the auxiliary outlet flap (44, 144, 244), in the closed position, forms a continuous continuation of the profile of the pump chamber (22) or of a wall (24, 29, 129, 229) of the pump chamber in the region around the auxiliary outlet (37) with roundings and/or archings corresponding to the region of the pump chamber surrounding the auxiliary outlet.
- Impeller pump according to any of the preceding claims, characterized in that the inner side (46, 146, 246) of the auxiliary outlet flap (44, 144, 244) has a lateral wall (50) with an angle of between 60° and 120° with respect to the outer side (45, 145, 245), which is opposite to the inner side and extends away from the pump chamber (22) in the direction of the auxiliary outlet (37) or into the auxiliary outlet, wherein the lateral wall (50), in an open position with the maximum degree of opening, at least partially still projects into the auxiliary outlet (37).
- Impeller pump according to claim 9, characterized in that the lateral wall (50) runs parallel to an encircling outer wall (24) of the pump chamber (22).
- Impeller pump according to claim 9 or 10, characterized in that the lateral wall (50), in the open position with the maximum degree of opening, runs with a spacing of between 0.5 cm and 2 cm to an encircling outer wall (24) of the pump chamber (22).
- Impeller pump according to any of the preceding claims, characterized in that the auxiliary outlet (37) leads out of the pump chamber (22) in a radial direction or in a plane perpendicular to the axis of rotation of the impeller (30).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL18207152T PL3492752T3 (en) | 2017-12-01 | 2018-11-20 | Impeller pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017221732.4A DE102017221732A1 (en) | 2017-12-01 | 2017-12-01 | impeller |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3492752A1 EP3492752A1 (en) | 2019-06-05 |
EP3492752B1 true EP3492752B1 (en) | 2021-11-17 |
Family
ID=64402023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18207152.2A Active EP3492752B1 (en) | 2017-12-01 | 2018-11-20 | Impeller pump |
Country Status (7)
Country | Link |
---|---|
US (1) | US10808705B2 (en) |
EP (1) | EP3492752B1 (en) |
JP (1) | JP7174606B2 (en) |
KR (1) | KR102662457B1 (en) |
CN (1) | CN109869349B (en) |
DE (1) | DE102017221732A1 (en) |
PL (1) | PL3492752T3 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019206203A1 (en) * | 2019-04-30 | 2020-11-05 | E.G.O. Elektro-Gerätebau GmbH | Water-bearing household appliance |
KR102419681B1 (en) | 2019-09-02 | 2022-07-08 | 광운대학교 산학협력단 | Weight memory device and weight memory system with variable capacitance and operating method therefor |
KR102405226B1 (en) | 2019-12-30 | 2022-06-02 | 광운대학교 산학협력단 | Weight memory device and weight memory system with variable capacitance and operating method therefor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10227297A (en) * | 1997-02-14 | 1998-08-25 | Hitachi Ltd | Pump |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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DE302379C (en) * | ||||
GB1200197A (en) * | 1967-10-05 | 1970-07-29 | Philips Electronic Associated | Improvements in or relating to centrifugal pumps |
US4753570A (en) * | 1986-10-14 | 1988-06-28 | Whirlpool Corporation | Bidirectional pump with diaphragm operated valve for dishwasher |
JPH0747088Y2 (en) * | 1988-02-15 | 1995-11-01 | 船井電機株式会社 | Dishwasher |
US4923366A (en) * | 1989-02-01 | 1990-05-08 | General Electric Company | Reversible turbine pump |
FR2655599B1 (en) * | 1989-12-07 | 1992-02-14 | Peugeot | DEVICE FOR SUPPLYING WINDOW WASHERS AND PROJECTOR WASHERS OF A MOTOR VEHICLE. |
JPH06249179A (en) * | 1993-02-22 | 1994-09-06 | Ouken Seiko Kk | Impeller pump |
DE4418153A1 (en) * | 1994-05-25 | 1995-11-30 | Wilo Gmbh | Centrifugal fluid delivery pump |
DE19932859C2 (en) * | 1998-10-01 | 2001-02-15 | Tuchenhagen Gmbh | Aseptic pump housing with switchable drainage |
JP4302955B2 (en) * | 2002-09-25 | 2009-07-29 | 日本電産シバウラ株式会社 | Pump and washing machine |
DE102007017271A1 (en) | 2007-04-12 | 2008-10-16 | BSH Bosch und Siemens Hausgeräte GmbH | Pump with heating device |
JP5316239B2 (en) * | 2009-06-08 | 2013-10-16 | 日本電産株式会社 | pump |
DE102013211180A1 (en) | 2013-06-14 | 2014-12-18 | E.G.O. Elektro-Gerätebau GmbH | pump |
EP3156659B1 (en) * | 2015-10-12 | 2020-09-16 | Grundfos Holding A/S | Pump unit and hydraulic system |
-
2017
- 2017-12-01 DE DE102017221732.4A patent/DE102017221732A1/en not_active Withdrawn
-
2018
- 2018-11-20 EP EP18207152.2A patent/EP3492752B1/en active Active
- 2018-11-20 PL PL18207152T patent/PL3492752T3/en unknown
- 2018-11-27 US US16/201,139 patent/US10808705B2/en active Active
- 2018-11-29 KR KR1020180151029A patent/KR102662457B1/en active IP Right Grant
- 2018-11-30 CN CN201811455391.0A patent/CN109869349B/en active Active
- 2018-12-03 JP JP2018226179A patent/JP7174606B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10227297A (en) * | 1997-02-14 | 1998-08-25 | Hitachi Ltd | Pump |
Also Published As
Publication number | Publication date |
---|---|
DE102017221732A1 (en) | 2019-06-06 |
US10808705B2 (en) | 2020-10-20 |
CN109869349B (en) | 2021-10-15 |
JP2019100343A (en) | 2019-06-24 |
JP7174606B2 (en) | 2022-11-17 |
KR20190065146A (en) | 2019-06-11 |
US20190203725A1 (en) | 2019-07-04 |
PL3492752T3 (en) | 2022-04-04 |
KR102662457B1 (en) | 2024-04-30 |
CN109869349A (en) | 2019-06-11 |
EP3492752A1 (en) | 2019-06-05 |
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