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
  • F04D29/58—Cooling; Heating; Diminishing heat transfer
  • F04D29/5806—Cooling the drive system
• • 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
  • F04D13/0606—Canned motor pumps
  • F04D13/0613—Special connection between the rotor compartments
• • 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
  • F04D13/0686—Mechanical details of the pump control unit
• • 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
  • F04D29/18—Rotors
  • F04D29/20—Mounting rotors on shafts
• • 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
  • F04D29/18—Rotors
  • F04D29/22—Rotors specially for centrifugal pumps
  • F04D29/2205—Conventional flow pattern
  • F04D29/2222—Construction and assembly
• • 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
  • F04D29/08—Sealings
  • F04D29/16—Sealings between pressure and suction sides
  • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
  • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel

Definitions

• Pump in particular a pump for a fluid circuit in a vehicle
• the invention relates to a pump, in particular for a fluid circuit in a vehicle, for example a coolant pump with a multi-part housing which has an inlet, a pump chamber, an outlet, a motor chamber and a motor for driving the impeller,
• the motor chamber is delimited radially outward by a first wall in which a stator of the motor is embedded,
• the rotor is non-rotatably connected to the impeller via a shaft
• the shaft is mounted in a socket in a second wall between the pump chamber and the motor chamber.
• Such pumps are known from document DE 10 2011 055 599 A1 and from the German patent application with the official file number DE 10 2018 125 031. These have a multi-part housing with the pump chamber, the motor chamber and an electronics chamber. In the pump chamber, the impeller is arranged to be driven by the motor, which is arranged in the motor chamber. An electrical circuit with which the motor can be controlled and / or regulated is provided in the electronics chamber.
• the rotor and a rotor of the motor are connected to one another via the shaft.
• the shaft is guided through a wall of the housing, through which the pump chamber and the motor chamber are separated from each other.
• a La gerbüchse is provided in which the shaft and also the rotor and the impeller are rotatably mounted.
• the socket in the wall between the motor chamber and the pump chamber of the pump described in the application DE 10 2018 125 031 points on an inside Grooves on. Via these grooves, a connection between the motor chamber and the pump chamber is created even when the shaft is inserted in the socket. A liquid can be transported from the motor chamber into the pump chamber via this connection.
• the invention is based on the object of establishing a connection between the Motorkam mer and the pump chamber without affecting the bearing of the shaft.
• One way of avoiding impairment of the bearing of the shaft is to establish the connection between the motor chamber and the pump chamber via a channel in the shaft, but this has other disadvantages and is also very complex. The inventor has therefore rejected the possibility of the hollow shaft.
• That at least one groove is provided on an outside of the socket, which together with the second wall forms a through hole which connects the engine chamber and the pump chamber to one another.
• a connection between the motor chamber and the pump chamber is established through the through hole according to the invention, without any through the hole Guided liquid comes into contact with the bearing and the bearing is affected by particles entrained in the liquid.
• the impeller has a bushing which is connected to the shaft in a rotationally fixed manner, while the rest of the impeller is connected to the bushing in a rotationally fixed manner.
• at least one through hole can then be provided radially outside the book se of the impeller.
• Such a through hole can compensate for an axial load that acts on the unit comprising the rotor and the impeller, for example due to different pressures on the side of the impeller facing the inlet and the side of the impeller facing the engine chamber.
• the bushing of the impeller and / or the bushing for mounting the shaft in an inne ren wall have at least one groove.
• the through holes provided according to the invention between the motor chamber and the pump chamber could, however, have the disadvantage that gas bubbles, in particular air bubbles that collect in the area of the axis of rotation of the rotor, are not or only insufficiently discharged from the motor chamber. A discharge then takes place, for example, through a gap between the shaft and the bushing, which is preferably constantly filled with the liquid for hydrodynamic storage during operation. If gas collects in the motor chamber, however, this can lead to insufficient cooling of the motor. It can therefore be useful to have at least one groove on the inside of the socket in addition to the through holes provided according to the invention in order to avoid gas accumulation.
• This at least one groove can have a clear cross section which is available for the transport of liquid and which is smaller than the clear cross section of the at least one through hole.
• the cross section of the at least one groove can be, for example, a fraction of the clear cross section of the at least one through hole.
• An annular chamber can be formed between the first wall and a third wall which lies radially outside the first wall. This annular chamber can be connected to the pump chamber via at least one through hole.
• Fig. 1 is a perspective view of a pump
• Fig. 2 shows a longitudinal section through the pump from Fig. 1 and
• Fig. 3 shows the longitudinal section as in Fig. 2, but with indicated by arrows
• the first pump has a multi-part housing which has a pump housing 10, a motor housing 20, an electronics housing 30 and a cover 40, a stator 50 of a motor of the pump being provided in the electronics housing 30.
• the motor of the pump is completed by a rotor 60 which is rotatably mounted on the Motorgeophu se 20 and in which the stator 50 is immersed.
• the stator 50 in turn dips into the motor housing 20.
• a circuit carrier 70 is provided on which an electronic circuit 80 is provided, via which the motor is supplied with electrical energy and is controlled.
• An electronics chamber E in which the circuit carrier 70 and the circuit 80 are arranged, is delimited by the electronics housing 30 and the cover 40 of the housing.
• the housing parts can be made of plastic, for example Vyncolit.
• the stator 50 is cast in the electronics housing 30, preferably in a first wall 301 which is formed by an apron of the electronics housing 30. By screws, not shown, the pump housing 10 and the Motorge housing 20 are connected to each other.
• the cover 40 and the electronics housing 30 and the electronics housing 30 and the motor housing 20 are connected to one another by screws, also not shown.
• a flange 101 of the pump housing 10 has a web 102 running around it, which positively engages in an annular groove 203 of the motor housing provided in a first flange 201 of the motor housing 20 is.
• the pump housing 10 and a wall 204 of the motor housing, namely a second wall which is penetrated by a motor shaft 601, include a Pumpenkam mer P in which the impeller 90 is located.
• the pump chamber P can be connected via a suction port 103 of the pump housing 10 to a line through which the liquid to be pumped is sucked in.
• the intake connector 103 is arranged coaxially to an axis of rotation of the rotor 60.
• the pump chamber P can be connected via an outlet connection 104 to a line into which the pumped liquid is pressed.
• An outer wall of the pump housing 10 and the impeller 90 delimit a spiral space S, which expands in a spiral-like manner to the outlet of the pump chamber.
• the impeller 90 is designed in a manner known per se, for example in a manner described in the document DE 10 2011 055 599 A1, FIG. 2,
• the pump has an impeller 90 which is rotatably arranged in the pump housing 10 and is attached to a shaft 601 of the rotor 60 which protrudes into the pump housing 10.
• the impeller 90 has a rim 903 on a side facing away from the motor housing 20.
• the ring 903 engages in an annular groove 106 in the pump housing 10.
• the annular groove 106 and the ring 903 have a larger diameter than the free cross section of the inlet connector 103.
• the ring 903 therefore does not impede a liquid flow from the inlet connector 103 into the pump chamber P. Since the ring 903 is immersed in the annular groove 106, the ring 903 also does not come into contact with the liquid flowing in. Movement of the ring 903 therefore has no influence on the inflowing liquid.
• the ring 903 of the impeller 90 is in the annular groove 106 of the pump housing 10 leads ge.
• annular groove 106 Between the ring 903 and an inner wall 108 of the annular groove 104 and between the ring 903 and an outer wall 107 of the ring groove 106 there is an inner and an outer annular gap.
• the ring 903 dipping into the annular groove 106 prevents a flow of liquid past the impeller 90 from the intake port 103 to the outlet. At most, a small leakage current is possible through the annular gap.
• the impeller 90 has a bushing 901, preferably made of metal, with a central through hole into which the rotor shaft 601 is inserted, so that the impeller 90 with the bushing 901 sits on the rotor shaft 601 in a torque-proof manner, preferably with a press fit.
• the rotor Parallel to the central through hole of the bushing 901, the rotor has through holes 902 through which a liquid can flow from a side of the impeller 90 facing the motor housing 20 to a side of the impeller 90 facing the inlet.
• a bush 206 which serves as a bearing for the rotor shaft 601.
• the bushing 206 for mounting the rotor shaft is inserted into the already mentioned wall 204 and firmly connected to the rest of the motor housing 20.
• the bush 206 has a through hole, the cross section of which is adapted to the rotor shaft 601.
• One or more grooves can be provided axially in the wall of the through hole, by the inserted rotor shaft 601 a liquid between the pump chamber P and a limited by the motor housing 20 and the skirt 301 motor chamber M and vice versa can flow. Small amounts of the liquid passed through the grooves 207 are carried along by the shaft 601 when the rotor rotates and ensure lubrication between the rotor shaft 601 and the bushing 206.
• one or more through holes 208 are provided in the area of the spiral space S, which provide a connection between the spiral space S and one of the motor housing 20, the apron 301 and an end wall 303 of the electronics housing 30 limited annular chamber R creates or create.
• a liquid can be conveyed through the through holes 208 from the spiral space, which lies on the floch pressure side of the impeller 90, into the annular chamber R.
• the annular chamber R is connected to the motor chamber M by one or more radial through holes 304 in the skirt 301.
• the through holes 304 are provided in the vicinity of the end wall 303.
• a liquid that passes from the annular chamber R into the motor chamber M can be conveyed through the motor chamber M, for example through a gap between the rotor 60 and the skirt 301, to the side of the motor chamber M facing the rotor 60 of the pump chamber P will.
• first through holes 603 and second through holes 604 are provided in a region of the rotor 60 between the shaft and the permanent magnet.
• the first through holes 603 extend parallel to the shaft 601 in an area immediately adjacent to the shaft 601.
• the second through holes 603 are radially further away from the rotor shaft 601 and thus closer to a permanent magnet that is embedded in the rotor. Both through holes connect a space of the motor chamber on a first side of the rotor and a space of the motor chamber on a second side of the rotor.
• the liquid can speed to the inlet side of the impeller 90, i.e. be promoted on the low-pressure side of the Laufra 90 (see Fig. 3). There is thus a continuous connec tion from the spiral space S, i.e.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=70861492

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (2)

Citations (6)

Family Cites Families (13)

• 2019
  • 2019-06-11 DE DE102019115778.1A patent/DE102019115778A1/de active Pending
• 2020
  • 2020-05-27 CN CN202410107212.3A patent/CN117927476A/zh active Pending
  • 2020-05-27 WO PCT/EP2020/064667 patent/WO2020249396A1/de active Application Filing
  • 2020-05-27 CN CN202080042158.9A patent/CN113994100A/zh active Pending

Patent Citations (6)

Also Published As

Similar Documents

Legal Events