CN104929988B - A kind of method and apparatus for eliminating cavitation - Google Patents
A kind of method and apparatus for eliminating cavitation Download PDFInfo
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- CN104929988B CN104929988B CN201510289332.0A CN201510289332A CN104929988B CN 104929988 B CN104929988 B CN 104929988B CN 201510289332 A CN201510289332 A CN 201510289332A CN 104929988 B CN104929988 B CN 104929988B
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Abstract
The present invention relates to a kind of method and apparatus for eliminating cavitation, device includes intake line, water pump, the pressurized gas line for being provided with pressure gauge and valve, pond, the pressure source that can provide pressed gas.The water in pond enters water pump via intake line, and pressed gas accesses intake line by pressurized gas line.Method includes the following steps：Water pump normal procedure is started shooting, with the presence of cavitation noise after start；By that can provide the device of pressed gas by being pressed into pressed gas mounted in the pressurized gas line of intake line, cavitation noise eliminates immediately after gas access；Water pump first passes through the press-in that valve prevents pressed gas before shutting down；After pressed gas is closed, water pump is then turned off.The inlet pipeline cut-in pressure gas of the present invention, the mode neutralized using pressure is by fundamentally eliminating cavitation, and easy to operate, cost ineffective fruit is good.
Description
Technical field
The present invention relates to a kind of method and apparatus for eliminating cavitation, and in particular to a kind of inlet pipeline cut-in pressure gas,
The mode neutralized using pressure is inherently eliminated the cavitation removing method and device of cavitation.
Background technology
Pressure minimum point is usually located near any of impeller blade import later in pump when centrifuging pump work.Pressed when herein
Power be down to by conveying liquid at this time at a temperature of saturated vapor pressure when, will seethe with excitement, the steam bubble generated with liquid from
In the outside Zhou Liudong of entrance, and drastically condensed because pressure increases rapidly.Liquid can be made to rush at gas from surrounding with very big speed
Bubble center, produces the impact that frequency is very high, instantaneous pressure is very big, and this phenomenon is known as cavitation phenomenons.
The shock wave for endangering impeller and pump case is delivered to during cavitation, it is rotten to metallochemistry plus the oxygen of oligodynamical in liquid
The collective effect of erosion, after a certain time, can make its surface spot and crack occur, or even progressively come off in spongy；Occur
During cavitation, noise can be also sent, and then vibrate the pump housing；Simultaneously because the generation of steam causes the apparent density of liquid to decline,
Then liquid actual flow, outlet pressure and efficiency all decline, and can cause to be unable to output liquid completely when serious.
It is the saturated vapor pressure that inlet pressure is less than under fluid delivery temperature to produce cavitation phenomenons essential reason.
Cavitation endangers water pump huge, and all more or less there are cavitation phenomenons, cavitation can make pump performance for many water pumps
Decline, produce noise and vibration, and make the pump lost of life, pump is not worked when serious.
The method that pump industry eliminates or reduces cavitation now mainly has following 5 kinds：
1st, designing the good impeller of cavitation performance, (pump reused for scene is difficult to realize, and to cavitation performance
Improve little)；
2nd, setting height of pump is reduced, this method civil engineering rectifying and improving amount is big, of high cost, is difficult to realize；
3rd, water level in water pool (and improving intake pressure) is improved, the change of this method scene is big, of high cost, is difficult to realize；
4th, using good cavitation erosion resistant material, such a method, which cannot eliminate cavitation, can only extend pump service life, of high cost.
5th, anti-cavitation coating is applied：Such a method cannot eliminate cavitation with the 4th kind can only extend pump service life, of high cost.
Above method is for the pump of onsite application, all extremely difficult realization, and of high cost.
The content of the invention
In view of the above-mentioned problems, it is a primary object of the present invention to provide a kind of inlet pipeline cut-in pressure gas, pressure is utilized
The method that the mode that power neutralizes is inherently eliminated cavitation.
The present invention is to solve above-mentioned technical problem by following technical proposals：A kind of method for eliminating cavitation, it is described
The method for eliminating cavitation has pressed gas in water pump operation in the press-in of its intake line, and pump cavitation is made an uproar after pressed gas press-in
Sound eliminates, and the method for eliminating cavitation is that have pressed gas by being accessed in water pump intake line by pressurized gas line,
Pressurized gas line is connected with the device that can provide pressed gas, and pressure gauge and valve are provided with the pressurized gas line.
Described method includes following steps：
Step (1), the start of water pump normal procedure, with the presence of cavitation noise after start；
Step (2), intake line install an access gas pipeline with valve close to water pump suction inlet；
Step (3), by can provide pressed gas device pass through mounted in intake line pressurized gas line be pressed into pressure
Gas, cavitation noise eliminates immediately after gas access；
Step (4), water pump first pass through the press-in that valve prevents pressed gas before shutting down；
After step (5), pressed gas are closed, water pump is then turned off.
In the specific embodiment of the present invention, intake line is connect higher than unit fixed on water pump suction pressure 0.1-0.3MPa pressure
Gas.
A kind of device for eliminating cavitation, including intake line, water pump, the water in pond enter water pump, institute via intake line
The device for stating elimination cavitation further includes pressurized gas line, and pressurized gas line is connected with the device that can provide pressed gas, pressure
Pressure gauge and valve are installed on power gas pipeline, pressure gauge is installed on intake line.
In the specific embodiment of the present invention, the device that can provide pressed gas is pressed gas tank.
In the specific embodiment of the present invention, the gas in the pressed gas tank is to have pressed gas.
In the specific embodiment of the present invention, the pressed gas tank is air pump.
In the specific embodiment of the present invention, the pressed gas tank is oxygen tank.
In the specific embodiment of the present invention, the pressed gas tank is compressor.
The positive effect of the present invention is：Cavitation removing method and cavitation cancellation element provided by the invention have with
Lower advantage：The inlet pipeline cut-in pressure gas of the present invention, the mode neutralized using pressure is by fundamentally eliminating cavitation, operation side
Just, cost ineffective fruit is good.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Embodiment
Present pre-ferred embodiments are provided below in conjunction with the accompanying drawings, with the technical solution that the present invention will be described in detail.
Fig. 1 is the overall structure diagram of the present invention.As shown in Figure 1, the present invention includes intake line 1, water pump 2, pond 3
Water enter water pump 2 via intake line 1, the device of the invention further includes pressurized gas line 4, and pressurized gas line 4 connects
The device 5 of pressed gas can be provided by having, and pressure gauge 7 and valve 8 are provided with pressurized gas line 4, is provided with intake line 1
Pressure gauge 6.
In the specific implementation process of the present invention, the device that can provide pressed gas generally can be pressed gas tank, pressure
For gas in power gas tank to there is pressed gas, pressed gas tank can be air pump, oxygen tank, compressor etc..
The method that device provided by the invention eliminates cavitation, includes the following steps：
Step (1), the start of water pump normal procedure, with the presence of cavitation noise after start；
Step (2), intake line install an access gas pipeline with valve close to water pump suction inlet；
Step (3), by can provide pressed gas device pass through mounted in intake line pressurized gas line be pressed into pressure
Gas, cavitation noise eliminates immediately after gas access；
Step (4), water pump first pass through the press-in that valve prevents pressed gas before shutting down；
After step (5), pressed gas are closed, water pump is then turned off.
In the present invention, intake line 1 connects the gas higher than unit fixed on water pump suction pressure 0.1-0.3MPa pressure, by accessing gas
The pressure of body eliminates pump cavitation.As long as the gas for having pressure of access, compressed air, air pump, oxygen tank, compressor
Interior gas all can, execute-in-place is simple, and cost is low.
Here is a specific example for eliminating cavitation：
One steel mill's water circulating pump workshop of Tangshan uses three flow 6000m3/ h water pumps, water feeding of water pump pipeline pressure gauge
Pressure 0.015MPa, pump cavitation noise is serious, and the cavitation perforation in 2 months of cast steel impeller cannot use.In water pump operation by steel
Factory's compressed air pipe cut-in pressure is 0.2MPa pressed gas, and cavitation noise eliminates after access, and water pump operation is steady, water pump leaf
Wheel is using 6 months also without the serious cavitation damage of generation.
Inlet pipeline cut-in pressure gas of the present invention, the mode neutralized using pressure is by fundamentally eliminating cavitation, operation side
Just, cost ineffective fruit is good.
The basic principles, main features and the advantages of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention, the claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (2)
- A kind of 1. method for eliminating cavitation, it is characterised in that：The method for eliminating cavitation is in water pump operation in its suction line Road press-in has pressed gas, and pump cavitation noise eliminates after pressed gas press-in, and the method for eliminating cavitation is by water Pump suction line has pressed gas by pressurized gas line access, and pressurized gas line is connected with the dress that can provide pressed gas Put, pressure gauge and valve are installed on the pressurized gas line；Described method includes following steps：Step (1), the start of water pump normal procedure, with the presence of cavitation noise after start；Step (2), intake line install an access gas pipeline with valve close to water pump suction inlet；Step (3), by that can provide the device of pressed gas be pressed into pressed gas by the pressurized gas line mounted in intake line, Cavitation noise eliminates immediately after gas access；Step (4), water pump first pass through the press-in that valve prevents pressed gas before shutting down；After step (5), pressed gas are closed, water pump is then turned off；Intake line connects the gas higher than unit fixed on water pump suction pressure 0.1-0.3MPa pressure.
- 2. a kind of device for eliminating cavitation, the device for eliminating cavitation includes intake line, water pump, and the water in pond is via suction Pipeline enters water pump, it is characterised in that：The device for eliminating cavitation further includes pressurized gas line, pressurized gas line connection The device of pressed gas can be provided by having, and pressure gauge and valve are provided with pressurized gas line, pressure is provided with intake line Table；The device that pressed gas can be provided is pressed gas tank；Pressed gas tank is air pump or oxygen tank or compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510289332.0A CN104929988B (en) | 2015-05-29 | 2015-05-29 | A kind of method and apparatus for eliminating cavitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510289332.0A CN104929988B (en) | 2015-05-29 | 2015-05-29 | A kind of method and apparatus for eliminating cavitation |
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| CN104929988A CN104929988A (en) | 2015-09-23 |
| CN104929988B true CN104929988B (en) | 2018-04-13 |
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| CN201510289332.0A Active CN104929988B (en) | 2015-05-29 | 2015-05-29 | A kind of method and apparatus for eliminating cavitation |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109989947A (en) * | 2019-03-19 | 2019-07-09 | 上海航天动力科技工程有限公司 | A kind of cavitation arrester |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0206119B1 (en) * | 1985-06-13 | 1988-09-07 | Shen, Hanshi Petroleum and Chemical Factory | Method and apparatus for eliminating cavitation in hydraulic systems |
| EP0895020B1 (en) * | 1997-08-01 | 2009-02-18 | Emile Roche | Device for introducing air into a hydropneumatic reservoir |
| CN202165327U (en) * | 2011-07-22 | 2012-03-14 | 上海真空泵厂有限公司 | Novel cavitation-free water-ring vacuum pump |
| CN103486088A (en) * | 2013-10-17 | 2014-01-01 | 山东双轮股份有限公司 | Cavitation eliminating device |
| CN204716636U (en) * | 2015-05-29 | 2015-10-21 | 上海东方泵业(集团)有限公司 | A kind of device eliminating cavitation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1740574A (en) * | 2005-08-19 | 2006-03-01 | 浙江大学 | Ejector capable of raising the cavitation performance of centrifugal pump |
-
2015
- 2015-05-29 CN CN201510289332.0A patent/CN104929988B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0206119B1 (en) * | 1985-06-13 | 1988-09-07 | Shen, Hanshi Petroleum and Chemical Factory | Method and apparatus for eliminating cavitation in hydraulic systems |
| EP0895020B1 (en) * | 1997-08-01 | 2009-02-18 | Emile Roche | Device for introducing air into a hydropneumatic reservoir |
| CN202165327U (en) * | 2011-07-22 | 2012-03-14 | 上海真空泵厂有限公司 | Novel cavitation-free water-ring vacuum pump |
| CN103486088A (en) * | 2013-10-17 | 2014-01-01 | 山东双轮股份有限公司 | Cavitation eliminating device |
| CN204716636U (en) * | 2015-05-29 | 2015-10-21 | 上海东方泵业(集团)有限公司 | A kind of device eliminating cavitation |
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| CN104929988A (en) | 2015-09-23 |
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Effective date of registration: 20191226 Address after: 226300 No.18, LingXiao Road, Xitong science and Technology Industrial Park, Tongzhou District, Nantong City, Jiangsu Province Patentee after: Shanghai Oriental Pump Group Nantong Co., Ltd Address before: 201906, No. 1588, Fu Lian Road, Shanghai, Baoshan District Patentee before: Shanghai Oriental Pump Industry (Group) Co., Ltd. |
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