CN205371105U - Prevent producing volute pump of cavitation - Google Patents
Prevent producing volute pump of cavitation Download PDFInfo
- Publication number
- CN205371105U CN205371105U CN201620005318.3U CN201620005318U CN205371105U CN 205371105 U CN205371105 U CN 205371105U CN 201620005318 U CN201620005318 U CN 201620005318U CN 205371105 U CN205371105 U CN 205371105U
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- mouth
- pump
- branch road
- cavitation
- pressure
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Abstract
The utility model discloses a prevent producing volute pump of cavitation. The utility model discloses a pump body, valve, backward flow branch road, the mouth of impressing, extrusion mouth, impressing between mouth and the extrusion mouth on the pump body is connected to the backward flow branch road, through switching valve control backward flow branch road, the backward flow branch road is arranged in some liquid reflux to the mouth of impressing with the extrusion mouth, makes to press entrance working medium liquid pressure to improve. Because the cavitation performance improves, the bubble that is produced by cavitation phenomena reduces, has weakened the impact of bubble breakage to the impeller and the pump body simultaneously, has reduced the vibration and noise the when volute pump moves, has improved the life of volute pump.
Description
Technical field
This utility model relates to a kind of peripheral pump, particularly relates to the peripheral pump of a kind of anti-generation cavitation, belongs to field of fluid machinery.
Background technology
Pump be a kind of have a large capacity and a wide range, universal machine that energy expenditure is huge, nearly all there is pump in every place having liquid to flow in work.In numerous pump series products, peripheral pump have high-lift, can realize self-priming, can the advantage such as gas-liquid delivery, in the industries such as agricultural irrigation, urban water supply and sewerage, electric power, have relatively broad application.During peripheral pump work, liquid flows into impeller from press-in mouth, flows back to again runner, and energy is passed to the liquid in runner after impeller accelerates, and is flowed out by extrusion mouth, make pump have significantly high lift after repeatedly repeating.The cavitation of peripheral pump refers to that pump is operationally, owing to wheel speed is very fast, pressing porch pressure too low at peripheral pump, especially the vacuum side of blade near peripheral pump pressure porch, its local pressure is lower than the vaporization pressure (saturated vapour pressure) of working fluid under running temperature, thus causing vaporizing liquid, easily producing bubble, bubbles burst forms huge pressure, and blade and the pump housing are caused intense impact, produce bigger noise and vibration, cause that its average life is lower than other kinds of pump.
Peripheral pump internal flow is the three-dimensional unsteady flow turbulent motion of a kind of complexity, changes along with operating condition change, is often accompanied by the flow phenomenon such as flow separation, cavitation.Research worker mainly adopts the means such as theory analysis, experimentation and numerical simulation that peripheral pump interior flow field is conducted a research all the time.Owing to theory analysis is difficult to reflect truly the internal flow situation of complexity, and peripheral pump interior flow field is carried out directly measuring also very difficult by laboratory facilities, experimentation cost is high, the cycle is long, the restriction of the operating technology of experiment, the accuracy of data and reliability all tested person instrument and environment.Therefore in peripheral pump interior flow field research process, theoretical and experimental study also exists significant limitation.In recent years, development along with computer technology and Fluid Mechanics Computation, numerical simulation is applied in the research of peripheral pump more and more, the complex flowfield of current peripheral pump calculates and is based on Naiver-Stokes equation and k-ε turbulence model, adopt finite volume method to solve the unstable state of three-dimensional, incompressible fluid field, and then obtain the information such as pressure and velocity of whole flow field.
Summary of the invention
The purpose of this utility model is the present situation being susceptible to cavitation for current peripheral pump, it is provided that the peripheral pump of a kind of anti-generation cavitation.This utility model takes full advantage of the feature that peripheral pump pressure exit liquid pressure is bigger, the partially liq in pressure exit is fed back to press-in mouth, carry the pressure of high pressure entry place liquid, the probability that peripheral pump pressure porch cavitation occurs is declined, thus avoiding peripheral pump to cause that because there is cavitation noise is serious, shake the phenomenons such as violent, making peripheral pump run more stable, longer service life is of a specified duration.
To achieve these goals, the technical solution adopted in the utility model is:
This utility model includes the pump housing, valve, backflow branch road, press-in mouth, extrudes mouth, described backflow branch road is connected to the press-in mouth on the pump housing and extrudes between mouth, backflow branch road is controlled by controlled valve, described backflow branch road, for being back in press-in mouth by the partially liq extruding mouth, makes pressure porch worker quality liquid pressure improve.
This utility model compared with prior art, has the beneficial effect that
1. easily there is the deficiency of cavitation in this utility model for current peripheral pump, propose the peripheral pump of a kind of anti-generation cavitation, by connecting a backflow branch road between press-in mouth and extrusion mouth, the partial high pressure liquid extruding mouth is back in the low pressure liquid of press-in port area, promote the liquid pressure of press-in mouth, make the pressure of pressure porch vacuum side of blade low-pressure area more than saturated vapour pressure, be not susceptible to cavitation, improve the cavitation performance of peripheral pump.
2. owing to cavitation performance improves, cavitation phenomenons the bubble produced reduces, and reduces the bubbles burst impact to impeller and the pump housing simultaneously, reduces vibration when peripheral pump runs and noise, improves the service life of peripheral pump.
3. this utility model is back to press-in mouth the partially liq extruding mouth, this partially liq is through the operating again of impeller, the integral energy of peripheral pump internal liquid improves, pressure exit liquid pressure promotes, have and laminate effect, the pressure reduction between import and export is made to expand, so that peripheral pump has higher lift.
4. structure of the present utility model is connected to one between the press-in mouth and extrusion mouth of peripheral pump and is with valvular backflow branch road, and simple in construction, the material used is identical with the pump housing, with low cost, practical.
Accompanying drawing explanation
Fig. 1 is the peripheral pump structural representation of a kind of anti-generation cavitation；
Fig. 2 is the peripheral pump internal pressure scattergram before improving；
Fig. 3 is the peripheral pump internal pressure scattergram after adding backflow branch road.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the technical scheme in this utility model, below in conjunction with the accompanying drawing in this utility model, technical scheme in utility model is carried out clear, complete description, obviously described is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment of utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, all should belong to the scope of utility model protection.
As it is shown in figure 1, the peripheral pump of a kind of anti-generation cavitation described in the utility model, including import 1, exporting 2, the pump housing 3, valve 4, reflux branch road 5, impeller 6, and cut water 7 is pressed into mouth 8, extrudes mouth 9.
Described backflow branch road one end is connected to described press-in mouth, and the other end is connected to described extrusion mouth；Backflow branch road caliber is 1/10th of outlet diameter；Backflow branch road is straight, it is to avoid the pressure loss caused because backflow branch road is irregular, impact laminates effect.Described water pump prototype is the peripheral pump of arbitrary size, model.
Described valve is on backflow branch road.Before peripheral pump runs, valve must completely close, and otherwise can cause that connection imported and exported by peripheral pump, and internal pressure reduces, and affects the self-priming of peripheral pump, impeller idle running phenomenon even occurs, causes that impeller wheel portion temperature steeply rises, and affects the normal use of peripheral pump；When peripheral pump runs, owing to the worker quality liquid in exit is through repeatedly passing in and out vortex pump impeller, producing longitudinal whirlpool so that worker quality liquid energy increases, pressure increases；After peripheral pump stable operation, open valve, the pressure in pressure exit is more than pressure porch, and the partially liq in pressure exit is pressed back into pressure porch, and this partially liq entered the impeller of peripheral pump again, obtain energy, the energy lift of worker quality liquid in whole pump, pressure back pressure becomes big, and inlet outlet pressure differential becomes big, lift improves therewith, has and laminates effect.
Described peripheral pump is carried out three-dimensional modeling, obtains the three dimensional fluid region of described peripheral pump, then gained fluid mass is carried out stress and strain model, it is thus achieved that the peripheral pump grid needed for numerical simulation.Select suitable turbulence model, border and the numerical solution N-S equation such as initial condition and physical properties of fluids, try to achieve the numerical simulation result of peripheral pump flow field, from whole flow field numerical simulation result, choose press-in mouth and extrude the pressure distribution of mouth.
Shown Fig. 2 is the peripheral pump internal pressure scattergram before improving, it is shown that Fig. 3 is the peripheral pump internal pressure scattergram after adding backflow branch road.By relative analysis Fig. 2 and Fig. 3, Fig. 3 press getting a promotion of the pressure of porch and extrusion mouth, reduce the probability that cavitation occurs.
The above; it it is only preferred embodiment of the present utility model; not this utility model is imposed any restrictions; every any simple modification, change and equivalent structure change above example made according to this utility model technical spirit, all still falls within the protection domain of technical solutions of the utility model.
Claims (1)
1. the peripheral pump of an anti-generation cavitation, it is characterized in that: include the pump housing, valve, backflow branch road, press-in mouth, extrude mouth, described backflow branch road is connected to the press-in mouth on the pump housing and extrudes between mouth, backflow branch road is controlled by controlled valve, described backflow branch road, for being back in press-in mouth by the partially liq extruding mouth, makes pressure porch worker quality liquid pressure improve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620005318.3U CN205371105U (en) | 2016-01-06 | 2016-01-06 | Prevent producing volute pump of cavitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620005318.3U CN205371105U (en) | 2016-01-06 | 2016-01-06 | Prevent producing volute pump of cavitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205371105U true CN205371105U (en) | 2016-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620005318.3U Expired - Fee Related CN205371105U (en) | 2016-01-06 | 2016-01-06 | Prevent producing volute pump of cavitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205371105U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508307A (en) * | 2016-01-06 | 2016-04-20 | 中国计量学院 | Anti-cavitation vortex pump |
-
2016
- 2016-01-06 CN CN201620005318.3U patent/CN205371105U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508307A (en) * | 2016-01-06 | 2016-04-20 | 中国计量学院 | Anti-cavitation vortex pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20210106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |