CN104074769A - Water pumping system of centrifugal pump - Google Patents
Water pumping system of centrifugal pump Download PDFInfo
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- CN104074769A CN104074769A CN201310097698.9A CN201310097698A CN104074769A CN 104074769 A CN104074769 A CN 104074769A CN 201310097698 A CN201310097698 A CN 201310097698A CN 104074769 A CN104074769 A CN 104074769A
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- centrifugal pump
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Abstract
The invention discloses a water pumping system of a centrifugal pump, which is used for improving the suction vacuum degree of the centrifugal pump, and comprises a water absorbing room, an impeller, a water pumping room, an air nozzle and a suction pipe. The water pumping system of the centrifugal pump is additionally provided with the suction pipe between the air nozzle and liquid, so that the centrifugal pump is operated to generate vacuum in the working process, and the liquid flows upwards; and as the suction pipe has no other accessories, the resistance of the suction pipe is lower, and the liquid is fed in the water absorbing room through the suction pipe, and flows back to a pipe connected with the water absorbing room through the gravity. Thereby, the whole water pumping system of the centrifugal pump forms a liquid sealed space, so that the suction vacuum degree of the centrifugal pump is not reduced by bubbles in the water pumping system, that is, the suction vacuum degree of the water pumping system of the centrifugal pump is improved.
Description
Technical field
The present invention relates to centrifugal pump, particularly relate to a kind of centrifugal pump pumping system of the degree of suction vacu um for improvement of centrifugal pump.
Background technique
Centrifugal pump pumping system, is the permission degree of suction vacu um based on pump, by air pressure, hydraulic pressure is entered to impeller, then by impeller centrifugal force, water is delivered to specified position.Water pump permission degree of suction vacu um can be different because of the complexity of the length of pump performance and suction line and annex.
In actual applications, when centrifugal pump running, fluid pressure declines along pump intake to impeller blade entrance, and near impeller blade entrance, fluid pressure is minimum.After this because impeller does work to liquid, fluid pressure rises very soon.In the time that near pressure impeller blade entrance is less than the saturated vapor pressure under liquid delivery temperature, liquid is vaporization just.Meanwhile, the gas that makes to be dissolved in liquid is overflowed.They form many steam bubbles.In the time that steam bubble flows to leaf road internal pressure higher position with liquid, the fluid pressure of outside is higher than the pressure for vaporization in steam bubble, and steam bubble condenses again to crumble and fall and forms hole, and moment, interior liquid was around brought to hole with high speed, caused liquid to clash into mutually.Like this, not only hinder liquid proper flow.Particularly serious, if these steam bubbles are crumbled and fall near impeller wall, liquid, just as the first sample of numerous submissile, hits metal surface continuously.Metal surface is because of impact fatigue breakaway.
For fear of the generation of above-mentioned cavitation phenomenons, more than near minimum pressure blade inlet must maintain a certain value, the saturation vapor pressure of normally getting liquid under delivery temperature (is generally 25*10 as minimum pressure
3pa), but affected so the actual degree of suction vacu um of centrifugal pump, required and inhale less than water thereby cause centrifugal pump can not meet setting height(from bottom).
Summary of the invention
Based on this, be necessary to provide a kind of centrifugal pump pumping system of the degree of suction vacu um that improves centrifugal pump.
A kind of centrifugal pump pumping system, for improvement of the degree of suction vacu um of centrifugal pump, comprise suction chamber, impeller, pumping chamber, valve, also comprise suction pipe, described suction chamber, described impeller and described pumping chamber connect successively, and described valve is arranged at a side of described suction chamber; Described suction chamber is positioned at water intake one side of described impeller, and described suction chamber is for guiding liquid into described impeller; Described impeller is used for from suction chamber imbitition and orders about liquid and rotate, then guides the liquid of rotation into described pumping chamber; Described pumping chamber is used for the liquid diffusion of rotation and flows to discharge conduit; Described valve is for importing the liquid of described suction pipe in centrifugal pump; One end of described suction pipe is connected with described valve, and the other end is placed in liquid.
In an embodiment, described impeller comprises blade therein, and described blade rotates under the drive of the pump housing, and the blade of rotation orders about liquid and rotates, and described blade is guided the liquid of rotation into described pumping chamber.
In an embodiment, described pumping chamber comprises spiral pumping chamber, stator and spatial guide blade therein.
In an embodiment, also comprise suction sleeve therein, described suction sleeve one end is connected with the water intake of described suction chamber, and the other end is placed in liquid.
In an embodiment, also comprise filter screen therein, described filter screen is arranged at described suction sleeve and is placed in the mouth of pipe of liquid one end, and described filter screen is for the impurity of filter liquide.
In an embodiment, also comprise valve therein, described valve is arranged at the mouth of pipe that described suction sleeve is connected with described suction chamber, and described valve is for controlling the water absorption of described suction sleeve.
In an embodiment, between described suction pipe and described valve, adopt screwed connection mode therein.
In an embodiment, described suction pipe is stainless steel therein.
Above-mentioned centrifugal pump pumping system by increasing suction pipe between valve and liquid, make centrifugal pump in the course of the work, centrifugal pump operation produces vacuum, liquid is up, and suction pipe does not have other annexes, therefore, the resistance of suction pipe is less, liquid enters suction chamber by suction pipe, and by gravity reflux as in the connected pipeline of suction chamber.Thereby whole centrifugal pump pumping system forms the space of hydraulic seal, so the degree of suction vacu um of centrifugal pump can not reduce because of the bubble in pumping system, has improved the degree of suction vacu um of centrifugal pump pumping system.
Brief description of the drawings
Fig. 1 is the structural representation of centrifugal pump pumping system in embodiment;
Fig. 2 is centrifugal pump pumping system working state schematic representation in embodiment.
Embodiment
As shown in Figure 1, be the structural representation of centrifugal pump pumping system in embodiment.
Incorporated by reference to Fig. 1 and Fig. 2.A kind of centrifugal pump pumping system, for improvement of the degree of suction vacu um of centrifugal pump, comprises suction chamber 101, impeller 103, pumping chamber 105, valve 107, also comprises suction pipe 109.Described suction chamber 101, described impeller 103 and described pumping chamber 105 connect successively, and described valve 107 is arranged at a side of described suction chamber 101.
Described suction chamber 101 is positioned at water intake one side of described impeller 103, and described suction chamber 101 is for guiding liquid in described impeller 103; Impeller 103, for from suction chamber 101 imbititions and order about liquid and rotate, then is guided the liquid of rotation into pumping chamber 105.Described pumping chamber 105 is for by the liquid diffusion of rotation and flow to discharge conduit; Described valve 107 is for importing the liquid of described suction pipe 109 in centrifugal pump; One end of described suction pipe 109 is connected with described valve 107, and the other end is placed in liquid.
Impeller 103 comprises blade, and described blade rotates under the drive of the pump housing, and the blade of rotation orders about liquid and rotates, and described blade is guided the liquid of rotation into described pumping chamber 105.
The main flow passage components of centrifugal pump have suction chamber 101, impeller 103 and pumping chamber 105.Suction chamber 101 is positioned at before the water intake of impeller 103, plays the effect of liquid being guided into impeller 103.Pumping chamber 105 mainly contains spiral pressurized water chamber (scroll casing type), stator and three kinds of forms of spatial guide blade.Impeller 103 is most important operation elements of centrifugal pump, is the heart of flow passage components.Impeller 103 is made up of cover plate and middle blade.
Before centrifugal pump work, first liquid will be full of in pump, then start centrifugal pump, impeller 103 quick rotation, the blade of impeller 103 orders about liquid and rotates, liquid relies on inertia to impeller 103 outer rim diffluences while rotation, impeller 103 is from suction chamber 101 inspiration liquid simultaneously, in this course, liquid in impeller 103 streams blade, streaming in motion liquid effects one lift in blade, blade is with a lift equal and opposite in direction therewith conversely, the masterpiece of opposite direction is for liquid, this power is done work to liquid, make liquid obtain energy and flow out impeller 103, at this moment the kinetic energy of liquid and pressure energy all increase.
Centrifugal pump relies on rotary blade 103, to the effect of liquid, the mechanical energy of prime mover is passed to liquid.Because the effect liquid of centrifugal pump flows to the process of outlet from impeller 103 imports, its speed energy and pressure energy are all increased, and the liquid of being discharged by impeller 103 is through pumping chamber 105, and most of speed can convert pressure energy to, then transfers out along discharge conduit.At this moment, impeller 103 inlets form vacuum or low pressure because of the discharge of liquid, and the liquid in priming reservoir is at liquid level pressure (barometric pressure P
0) effect under, be pressed into the import of impeller 103, so the impeller that rotating 103 just continuously sucks and discharge liquid.
Pumping chamber 105 comprises spiral pumping chamber, stator and spatial guide blade.
Centrifugal pump pumping system also comprises suction sleeve 111, and described suction sleeve 111 one end are connected with the water intake of described suction chamber 101, and the other end is placed in liquid.
Centrifugal pump pumping system also comprises filter screen 113, and described filter screen 113 is arranged at described suction sleeve 111 and is placed in the mouth of pipe of liquid one end, and described filter screen 113 is for the impurity of filter liquide.
Centrifugal pump pumping system also comprises valve 115, and described valve 115 is arranged at the mouth of pipe that described suction sleeve 111 is connected with described suction chamber 101, and described valve 115 is for controlling the water absorption of described suction sleeve 111.
Between suction pipe 109 and described valve 107, adopt screwed connection mode.
Suction pipe 109 is stainless steel.
Suction pipe 109 internal surfaces are smooth.The diameter of suction pipe 109 is less, is generally 5mm-15mm.
Suction pipe 109 is connected with valve 107 by screwed connection mode, and suction pipe 109 communicates with valve 107, and the movable end of suction pipe 109 is placed in liquid.In service at centrifugal pump, filling liquid in suction pipe 109, because the diameter of suction pipe 109 is less, the resistance of suction pipe 109 is less, and liquid can enter suction chamber 101 by suction pipe 109, so by gravity reflux in the pipeline being connected with suction chamber 101, form hydraulic seal, make not have alveolate existence in centrifugal pump pumping system, avoided cavitation phenomenons, and improved the degree of suction vacu um of centrifugal pump.
Above-mentioned centrifugal pump pumping system by increasing suction pipe 109 between valve 107 and liquid, make centrifugal pump in the course of the work, centrifugal pump operation produces vacuum, liquid is up, for example, and suction pipe 109 does not have other annexes (: valve and filter screen), therefore, the resistance of suction pipe 109 is less, liquid enters suction chamber 101 by suction pipe 109, and by gravity reflux in the pipeline being connected with suction chamber 101.Thereby whole centrifugal pump pumping system forms the space of hydraulic seal, so the degree of suction vacu um of centrifugal pump can not reduce because of the bubble in pumping system, has improved the degree of suction vacu um of centrifugal pump pumping system.
Embodiment has only expressed several mode of execution of the present invention in sum, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention, for example: the present invention is also applicable to the situation that suction pipe contains other annexes (filter screen, bottom valve etc.), and allow degree of suction vacu um to be slightly less than the height H of dried up of water pump axis i
g.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a centrifugal pump pumping system, for improvement of the degree of suction vacu um of centrifugal pump, comprises suction chamber, impeller, pumping chamber, valve, it is characterized in that, also comprise suction pipe, described suction chamber, described impeller and described pumping chamber connect successively, and described valve is arranged at a side of described suction chamber; Described suction chamber is positioned at water intake one side of described impeller, and described suction chamber is for guiding liquid into described impeller; Described impeller is used for from suction chamber imbitition and orders about liquid and rotate, then guides the liquid of rotation into described pumping chamber; Described pumping chamber is used for the liquid diffusion of rotation and flows to discharge conduit; Described valve is for importing the liquid of described suction pipe in centrifugal pump; One end of described suction pipe is connected with described valve, and the other end is placed in liquid.
2. centrifugal pump pumping system according to claim 1, is characterized in that, described impeller comprises blade, and described blade rotates under the drive of the pump housing, and the blade of rotation orders about liquid and rotates, and described blade is guided the liquid of rotation into described pumping chamber.
3. centrifugal pump pumping system according to claim 1, is characterized in that, described pumping chamber comprises spiral pumping chamber, stator and spatial guide blade.
4. centrifugal pump pumping system according to claim 1, is characterized in that, also comprises suction sleeve, and described suction sleeve one end is connected with the water intake of described suction chamber, and the other end is placed in liquid.
5. centrifugal pump pumping system according to claim 4, is characterized in that, also comprises filter screen, and described filter screen is arranged at described suction sleeve and is placed in the mouth of pipe of liquid one end, and described filter screen is for the impurity of filter liquide.
6. centrifugal pump pumping system according to claim 4, is characterized in that, also comprises valve, and described valve is arranged at the mouth of pipe that described suction sleeve is connected with described suction chamber, and described valve is for controlling the water absorption of described suction sleeve.
7. centrifugal pump pumping system according to claim 1, is characterized in that, between described suction pipe and described valve, adopts screwed connection mode.
8. centrifugal pump pumping system according to claim 1, is characterized in that, described suction pipe is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310097698.9A CN104074769B (en) | 2013-03-25 | 2013-03-25 | Water pumping system of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310097698.9A CN104074769B (en) | 2013-03-25 | 2013-03-25 | Water pumping system of centrifugal pump |
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| Publication Number | Publication Date |
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| CN104074769A true CN104074769A (en) | 2014-10-01 |
| CN104074769B CN104074769B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310097698.9A Active CN104074769B (en) | 2013-03-25 | 2013-03-25 | Water pumping system of centrifugal pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559213A (en) * | 2017-10-18 | 2018-01-09 | 南京腾图节能科技有限公司 | A kind of remote monitoring centrifugal pump of high height of drawing water |
| CN108254300A (en) * | 2017-12-13 | 2018-07-06 | 西北农林科技大学 | A kind of device and method for measuring pervious surface infiltration rate |
| CN110217841A (en) * | 2019-07-17 | 2019-09-10 | 郑水芝 | A kind of deodorization cesspool of high-efficient dirt exhausting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134897A (en) * | 1986-11-25 | 1988-06-07 | Kubota Ltd | Vertical shaft pump |
| CN1227315A (en) * | 1998-02-24 | 1999-09-01 | 张玉良 | Air inlet operation method for hydraulic pump vane wheel |
| US6206632B1 (en) * | 1999-03-26 | 2001-03-27 | Timothy D. Gallus | Bleed tube for centrifugal pump and method for retrofitting same |
| CN201671823U (en) * | 2010-05-07 | 2010-12-15 | 上海凯泉泵业（集团）有限公司 | Single-stage and single-suction centrifugal pump |
| CN102506028A (en) * | 2011-10-28 | 2012-06-20 | 山东农业大学 | Water filling device of pump station floating ball valve type automatic sealing water tank |
-
2013
- 2013-03-25 CN CN201310097698.9A patent/CN104074769B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134897A (en) * | 1986-11-25 | 1988-06-07 | Kubota Ltd | Vertical shaft pump |
| CN1227315A (en) * | 1998-02-24 | 1999-09-01 | 张玉良 | Air inlet operation method for hydraulic pump vane wheel |
| US6206632B1 (en) * | 1999-03-26 | 2001-03-27 | Timothy D. Gallus | Bleed tube for centrifugal pump and method for retrofitting same |
| CN201671823U (en) * | 2010-05-07 | 2010-12-15 | 上海凯泉泵业（集团）有限公司 | Single-stage and single-suction centrifugal pump |
| CN102506028A (en) * | 2011-10-28 | 2012-06-20 | 山东农业大学 | Water filling device of pump station floating ball valve type automatic sealing water tank |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559213A (en) * | 2017-10-18 | 2018-01-09 | 南京腾图节能科技有限公司 | A kind of remote monitoring centrifugal pump of high height of drawing water |
| CN108254300A (en) * | 2017-12-13 | 2018-07-06 | 西北农林科技大学 | A kind of device and method for measuring pervious surface infiltration rate |
| CN110217841A (en) * | 2019-07-17 | 2019-09-10 | 郑水芝 | A kind of deodorization cesspool of high-efficient dirt exhausting |
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| Publication number | Publication date |
|---|---|
| CN104074769B (en) | 2017-02-08 |
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