CN104074769B - Water pumping system of centrifugal pump - Google Patents
Water pumping system of centrifugal pump Download PDFInfo
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- CN104074769B CN104074769B CN201310097698.9A CN201310097698A CN104074769B CN 104074769 B CN104074769 B CN 104074769B CN 201310097698 A CN201310097698 A CN 201310097698A CN 104074769 B CN104074769 B CN 104074769B
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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, the centrifugal pump of more particularly to a kind of degree of suction vacu um for improving centrifugal pump draws water
System.
Background technology
Centrifugal pump pumping system, is the permission degree of suction vacu um based on pump, by air pressure, hydraulic pressure is entered impeller, then passes through leaf
Water is delivered to specified location by wheel centrifugal force.Water pump permission degree of suction vacu um can be because of the length of the performance of pump and suction line and adnexa
Complexity and different.
In actual applications, during centrifugal pump operating, fluid pressure declines along pump intake to impeller blade entrance, in leaf
Impeller blade entrance, fluid pressure is minimum.Hereafter because impeller does work to liquid, fluid pressure rises quickly.When impeller leaf
When the pressure of piece entrance is less than the saturated vapour pressure under liquid delivery temperature, liquid just vaporizes.Meanwhile, make to be dissolved in liquid
Internal gas effusion.They form many steam bubbles.When steam bubble flows to Ye Daonei pressure higher position with liquid, the liquid of outside
Pressure is higher than the pressure for vaporization in steam bubble, then steam bubble condenses formation hole of crumbling and fall again, and the liquid of moment inner periphery is with high
Speed bring to hole, cause liquid to clash into mutually.So, not only hinder liquid proper flow.It is particularly acute, if
These steam bubbles are crumbled and fall in impeller near wall, then liquid, just as numerous little bullet, continuously hits metal surface.Metal
Surface breakaway because of impact fatigue.
In order to avoid the generation of above-mentioned cavitation phenomenons, the minimum pressure near blade inlet must be maintained at a certain value with
On, the saturated vapour pressure typically taking liquid under delivery temperature is as minimum pressure（Generally 25*103pa）But, so shadow
Ring the degree of suction vacu um of the reality of centrifugal pump, thus lead to centrifugal pump can not meet setting height(from bottom) and requiring and inhale less than water.
Content of the invention
Based on this it is necessary to provide a kind of centrifugal pump pumping system of the degree of suction vacu um improving centrifugal pump.
A kind of centrifugal pump pumping system, for improving the degree of suction vacu um of centrifugal pump, including suction chamber, impeller, pumping chamber,
Valve, also includes suction tube, and described suction chamber, described impeller and described pumping chamber are sequentially connected, and described valve is arranged at described
The side of suction chamber；Described suction chamber is located at the water inlet side of described impeller, and described suction chamber is used for directing liquid towards described
Impeller；Described impeller is used for drawing liquid from suction chamber and ordering about liquid rotation, then the liquid of rotation is guided into described pumping chamber；
Described pumping chamber is used for the liquid diffusion of rotation and is conveyed to discharge line；Described valve is used for the liquid in described suction tube
Body imports in centrifugal pump；One end of described suction tube is connected with described valve, and the other end is placed in liquid.
Wherein in an embodiment, described impeller includes blade, and described blade rotates under the drive of the pump housing, rotation
Blade orders about liquid and rotates, and described blade guides the liquid of rotation into described pumping chamber.
Wherein in an embodiment, described pumping chamber includes spiral pumping chamber, stator and spatial guide blade.
Wherein in an embodiment, also include suction hose, described suction hose one end is connected with the water inlet of described suction chamber
Connect, the other end is placed in liquid.
Wherein in an embodiment, also include filter screen, described filter screen is arranged at described suction hose and is placed in liquid one end
The mouth of pipe, described filter screen is used for the impurity in filter liquid.
Wherein in an embodiment, also include valve, described valve is arranged at described suction hose with described suction chamber even
The mouth of pipe connecing, described valve is used for controlling the water absorption of described suction hose.
Wherein in an embodiment, between described suction tube and described valve, adopt screwed connection mode.
Wherein in an embodiment, described suction tube is stainless steel.
Above-mentioned centrifugal pump pumping system is passed through to increase suction tube between valve and liquid so that centrifugal pump is in work process
In, centrifugation pump operation produces vacuum, and liquid is up, and suction tube does not have other adnexaes, and therefore, the resistance of suction tube is less, liquid
Body is entered in suction chamber, and the pipeline being connected as suction chamber by gravity reflux by suction tube.Thus being entirely centrifuged pumping
Water system forms the space of liquid seal, so the degree of suction vacu um of centrifugal pump will not drop because of the bubble in pumping system
Low, that is, improve the degree of suction vacu um of centrifugal pump pumping system.
Brief description
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.
Specific embodiment
As shown in figure 1, the structural representation for centrifugal pump pumping system in embodiment.
Incorporated by reference to Fig. 1 and Fig. 2.A kind of centrifugal pump pumping system, for improving the degree of suction vacu um of centrifugal pump, including water suction
Room 101, impeller 103, pumping chamber 105, valve 107, also include suction tube 109.Described suction chamber 101, described impeller 103 and institute
State pumping chamber 105 to be sequentially connected, described valve 107 is arranged at the side of described suction chamber 101.
Described suction chamber 101 is located at the water inlet side of described impeller 103, and described suction chamber 101 is used for directing liquid towards
Described impeller 103；Impeller 103 is used for drawing liquid from suction chamber 101 and ordering about liquid rotation, then the liquid of rotation is guided into pressure
Hydroecium 105.Described pumping chamber 105 is used for the liquid diffusion of rotation and is conveyed to discharge line；Described valve 107 is used for institute
The liquid stated in suction tube 109 imports in centrifugal pump；One end of described suction tube 109 is connected with described valve 107, and the other end is put
In liquid.
Impeller 103 includes blade, and described blade rotates under the drive of the pump housing, and the blade of rotation orders about liquid and rotates, institute
State blade and guide 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 located at impeller
Before 103 water inlet, play effect liquid being guided into impeller 103.Pumping chamber 105 mainly has spiral pressurized water chamber（Spiral case
Formula）, stator and three kinds of forms of spatial guide blade.Impeller 103 is the most important operation element of centrifugal pump, is the heart of flow passage components
Dirty.Impeller 103 is made up of cover plate and middle blade.
Before centrifugation pump work, first will be hydraulically full in pump, then start centrifugal pump, impeller 103 quick rotation, impeller 103
Blade order about liquid rotate, liquid rotate when rely on inertia to impeller 103 outer rim diffluence, impeller 103 is from suction chamber 101 simultaneously
Inspiration liquid, in this course, the liquid in impeller 103 streams blade, and in streaming motion, liquid effects one lift is in leaf
Piece, in turn blade liquid is acted on a power equal in magnitude, in opposite direction with this lift, this power to liquid do work,
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 transmitted liquid.Due to centrifugation
During impeller 103 import flow direction outlet, its speed all can be increased, by impeller the application fluids of pump with pressure energy
Through pumping chamber 105, most of speed can be converted into pressure energy, then transfer out along discharge line the liquid of 103 discharges.This
When, impeller 103 entrance forms vacuum or low pressure because of the discharge of liquid, and the liquid in priming reservoir is in levels pressure（Atmospheric pressure
P0）In the presence of, it is pressed into the import of impeller 103, then, the impeller 103 being rotating just continuously is continuously drawn into and discharge liquor
Body.
Pumping chamber 105 includes spiral pumping chamber, stator and spatial guide blade.
Centrifugal pump pumping system also includes suction hose 111, the water inlet of described suction hose 111 one end and described suction chamber 101
Mouth connects, and the other end is placed in liquid.
Centrifugal pump pumping system also includes filter screen 113, and described filter screen 113 is arranged at described suction hose 111 and is placed in liquid one
The mouth of pipe at end, described filter screen 113 is used for the impurity in filter liquid.
Centrifugal pump pumping system also includes valve 115, and described valve 115 is arranged at described suction hose 111 and described water suction
The mouth of pipe that room 101 connects, described valve 115 is used for controlling the water absorption of described suction hose 111.
Screwed connection mode is adopted between suction tube 109 and described valve 107.
Suction tube 109 is stainless steel.
Suction tube 109 inner surface is smooth.The diameter of suction tube 109 is less, generally 5mm-15mm.
Suction tube 109 is connected with valve 107 by screwed connection mode, and suction tube 109 is communicated with valve 107, suction tube
109 movable end is placed in liquid.In centrifugation pump operation, inject liquid in suction tube 109, due to the diameter of suction tube 109
Less, the resistance of suction tube 109 is less, and liquid can enter suction chamber 101 by suction tube 109, and then passes through gravity reflux
To the pipeline being connected with suction chamber 101, forming liquid seal so that not having alveolate presence in centrifugal pump pumping system, keeping away
Exempt from cavitation phenomenons, and improve the degree of suction vacu um of centrifugal pump.
Above-mentioned centrifugal pump pumping system is passed through to increase suction tube 109 between valve 107 and liquid so that centrifugal pump is in work
During work, centrifugation pump operation produces vacuum, and liquid is up, and suction tube 109 does not have other adnexaes（For example：Valve and filter screen）,
Therefore, the resistance of suction tube 109 is less, liquid by suction tube 109 enter suction chamber 101, and by gravity reflux to suction
In the pipeline that hydroecium 101 is connected.Thus whole centrifugal pump pumping system forms the space of liquid seal, so the sucting of centrifugal pump
Vacuum will not reduce because of the bubble in pumping system, that is, improve the degree of suction vacu um of centrifugal pump pumping system.
Embodiment only have expressed the several embodiments of the present invention in sum, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as, for example：It is suitable for suction tube contains other adnexaes
（Filter screen, bottom valve etc.）Situation, and allow degree of suction vacu um be slightly less than the height H from the water surface for water pump axis ig.It should be understood that
It is for the person of ordinary skill of the art, without departing from the inventive concept of the premise, some deformation can also to be made
And improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention with claims should be
Accurate.
Claims (7)
1. a kind of centrifugal pump pumping system, for improving the degree of suction vacu um of centrifugal pump, including suction chamber, impeller, pumping chamber, gas
It is characterised in that also including suction tube, described suction chamber, described impeller and described pumping chamber are sequentially connected mouth, and described valve sets
It is placed in the side of described suction chamber；Described suction chamber is located at the water inlet side of described impeller, and described suction chamber is used for liquid
Guide described impeller into；Suck pipe internal surface smooth；A diameter of 5mm-15mm of suction tube；Described impeller is used for drawing from suction chamber
Liquid simultaneously orders about liquid rotation, then the liquid of rotation is guided into described pumping chamber；Described pumping chamber is used for expanding the liquid rotating
Press and be conveyed to discharge line；Described valve is used for importing the liquid in described suction tube in centrifugal pump；Described suction tube
One end is connected with described valve, and the other end is placed in liquid；Screwed connection mode is adopted between described suction tube and described valve；
Described suction tube is communicated with described valve, and the movable end of described suction tube is placed in liquid；In centrifugation pump operation, described suction
Inject liquid in pipe, liquid passes through described suction tube and enters described suction chamber, so by gravity reflux to described suction chamber
In connected pipeline, form liquid seal；Described centrifugal pump pumping system also includes suction hose, described suction hose one end with described
The water inlet of suction chamber connects, and the other end is placed in liquid.
2. centrifugal pump pumping system according to claim 1 is it is characterised in that described impeller includes blade, described blade
Rotate under the drive of the pump housing, the blade of rotation orders about liquid and rotates, and described blade guides the liquid of rotation into described pumping chamber.
3. centrifugal pump pumping system according to claim 1 is it is characterised in that described pumping chamber includes spiral pumping chamber
Or stator.
4. centrifugal pump pumping system according to claim 3 is it is characterised in that described stator includes spatial guide blade.
5. it is characterised in that also including filter screen, described filter screen is arranged at centrifugal pump pumping system according to claim 1
Described suction hose is placed in the mouth of pipe of liquid one end, and described filter screen is used for the impurity in filter liquid.
6. it is characterised in that also including valve, described valve is arranged at centrifugal pump pumping system according to claim 1
The mouth of pipe that described suction hose is connected with described suction chamber, described valve is used for controlling the water absorption of described suction hose.
7. centrifugal pump pumping system according to claim 1 is it is characterised in that described suction tube 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 |
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| 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 CN104074769A (en) | 2014-10-01 |
| CN104074769B true CN104074769B (en) | 2017-02-08 |
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| CN201310097698.9A Active CN104074769B (en) | 2013-03-25 | 2013-03-25 | Water pumping system of centrifugal pump |
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Families Citing this family (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 |
| CN110217841B (en) * | 2019-07-17 | 2021-09-24 | 山东同其工业互联网有限公司 | Deodorant effluent water sump of high-efficient blowdown |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134897A (en) * | 1986-11-25 | 1988-06-07 | Kubota Ltd | Vertical shaft pump |
| CN1097679C (en) * | 1998-02-24 | 2003-01-01 | 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 |
| CN102506028B (en) * | 2011-10-28 | 2014-02-26 | 山东农业大学 | Water filling device of pump station floating ball valve type automatic sealing water tank |
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