CN102913463B - Self-priming height test bed for self-priming pump with high priming travel - Google Patents
Self-priming height test bed for self-priming pump with high priming travel Download PDFInfo
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- CN102913463B CN102913463B CN201210140932.7A CN201210140932A CN102913463B CN 102913463 B CN102913463 B CN 102913463B CN 201210140932 A CN201210140932 A CN 201210140932A CN 102913463 B CN102913463 B CN 102913463B
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- pump
- priming
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Abstract
The invention relates to a self-priming height test bed for a self-priming pump with a high priming travel. The test bed comprises a test pump 1, an adjustable variable-frequency pressurization pump 5 and an electric fixed-difference depressurization valve 9. According to the test bed, the height of the conventional lifting table is used; in order to simulate a state of an actual self-priming height, the adjustable variable-frequency pressurization pump 5 is added on a water-returning pipe of the pump to compensate a pressing head at an inlet of a sprayer of a jet flow device, and the electric fixed-difference depressurization valve 9 is added to increase pressure drop of the inlet of the pump; an inlet of the adjustable variable-frequency pressurization pump 5 is connected with an outlet of the water-returning pipe 4 of the pump, and an outlet of the adjustable variable-frequency pressurization pump 5 is connected with an inlet of the sprayer of the jet flow device 7; and an inlet of the electric fixed-difference depressurization valve 9 is connected with the upper end of a Venturi pipe of the jet flow device 7, and an outlet of the electric fixed-difference depressurization valve 9 is connected with an inlet of the test pump 1. According to a mounting height to be simulated, a lift of the adjustable variable-frequency pressurization pump 5 and a to-be-reduced pressure difference between the inlet and the outlet of the electric fixed-difference depressurization valve 9 are determined and are set. The self-priming height test bed has the characteristics that the actual mounting height of the test bed is not changed and a demand for testing various spraying pumps can be met.
Description
Technical field
The present invention relates to a kind of high priming stroke self priming pump suction lift test bench.
Background technique
Self-priming pump belongs to a kind of special centrifugal pump, it only need to add a certain amount of water before referring to first and starting in pump, without intake pipe is all full of to water, after startup through certain working time, gas in intake pipe can be discharged, enter immediately a class water pump of normal working.Except the water-power performance parameter that Ordinary Centrifugal Pumps has, outside the parameters such as flow, lift, efficiency, suction lift, self-priming time are the distinctive performance parameters of self-priming pump, are the important indicators of evaluating self-priming pump self-priming performance.Suction lift refers to when self-priming pump draws up liquid that liquid level is to the setting height(from bottom) of pump inlet flange center line.Generally, when pump inlet is not installed special device, the setting height(from bottom) of pump is pressure for vaporization, necessary NPSH and the inlet pipeline loss that barometric pressure head height (10.33m) deducts pump, and therefore general setting height(from bottom) is no more than 9m.But in actual applications, particularly, now along with the decline of level of ground water, earth's surface water level, a lot of occasions need to be moved the pump that setting height(from bottom) exceedes 9m, i.e. at this moment high priming stroke self priming pump just need to increase special device to realize larger suction lift on pump.Jet pump is the one of self-priming pump, and it is made up of centrifugal pump and fluidic device, and the vacuum that relies on fluidic device to cause at nozzle place realizes self-priming.As required, more than the self-priming setting height(from bottom) of jet pump can design and reach 40m.
The measurement of suction lift is generally that self-priming pump is arranged in a lifting tower, changes the height of lifting tower to pond.If pump can turn round by successful self-priming under this setting height(from bottom), illustrate that self-priming pump can reach this suction lift, therefore, need to set up the lifting tower of corresponding height with test pump suction lift.Current normally used self-priming pump lifting tower generally can reach 8-9m height, to adapt to the test of common self-priming pump self-priming performance.But for the higher jet pump of suction lift, adopt above conventional method need to spend a large amount of human and material resources and financial resources and set up specially the raising platform of corresponding height or jet pump is put into very dark well with test suction lift.At present the domestic lifting tower of also not setting up specially relevant height and deep-well are with test high priming stroke self priming pump suction lift, and the suction lift of high suction depth jet pump is tested in space state, has affected the raising of hydraulic performance and the further developing of this pump of this pump.
Traditional test method and test stand are arranged as described below:
Jet pump is made up of centrifugal pump and fluidic device, first centrifugal pump is installed under design and installation height, first fills water before startup, and outlet gate valve is closed, starting electrical machinery, and centrifugal pump is started working.Hydraulic pressure in return pipe starts supercharging, and before gate valve is not opened, the water in reflow pipe, through fluidic device, intake pipe, is got back to again centrifugal pump and continued circulation, and now bottom valve cuts out.Outlet gate valve is opened gradually, exports a small amount of water and discharges, and the water that at this moment nozzle in fluidic device sprays is at a high speed taken away liquid around, and nozzle ambient pressure declines.Under atmospheric effect, bottom valve is opened (impact that opening degree is exported gate valve opening degree), starts water suction.Along with gate valve is opened gradually, the aperture of bottom valve increases gradually, if pump is normal under this setting height(from bottom), suction lift is pump setting height(from bottom).
Nowadays, more than the suction lift of jet pump can design and reach 40m, obviously, traditional test method is tested this kind of pump setting height(from bottom) also need to be more than 40m.If the higher jet pump of test suction lift need to be arranged on very high place or lifting tower, need very high setting height(from bottom), this must need a large amount of inputs.
Summary of the invention
The object of the present invention is to provide a kind of high priming stroke self priming pump suction lift test bench, can meet the test request of the self-priming pump of higher suction lift.Compared with traditional self-priming pump suction lift test bench, this test bench can be measured actual higher suction lift under less setting height(from bottom).
The technical solution adopted in the present invention is as follows: this test stand is mainly made up of test pump, adjustable freq uency conversion supercharging pump and electronic Fixed differential reducing valve etc.
This test stand utilizes conventional raising platform height, in order to simulate the running state of actual suction lift, on blowback water pipe, increase adjustable freq uency conversion supercharging pump to supplement fluidic device sparger inlet pressure head, on pump water inlet pipe, increase electronic Fixed differential reducing valve to increase the pressure drop of pump inlet.Adjustable freq uency conversion supercharging pump is connected on return pipe return pipe is carried out to supercharging, and electronic Fixed differential reducing valve is connected on intake pipe intake pipe is reduced pressure, and test pump setting height(from bottom) is conventional setting height(from bottom), i.e. lower setting height(from bottom).
Before test, need to, according to the design and installation height of test pump, adjustable freq uency conversion supercharging pump and electronic Fixed differential reducing valve be set, to meet the requirement of testing for specific jet pump.
In order to simulate the running state of self-priming pump at actual suction lift, on blowback water pipe, there is following formula:
H
g＝H
z+H′
g+H
f1
, adjustable freq uency conversion supercharging pumping head be set with following formula:
H
z＝H
g-H′
g-H
f1
H
z: the lift that adjustable freq uency conversion supercharging pump produces, the m of unit
H
g: the design suction lift of test pump, the m of unit
H '
g: the as installed height of this test bench, the m of unit
H
f1: the hydraulic loss in return pipe, the m of unit
In like manner, on pump water inlet pipe, there is following formula:
H
g＝H
j+H′
g+H
f2
Electronic Fixed differential reducing valve is set with to following formula:
H
j＝H
g-H′
g-H
f2
H
j: the pressure drop that electronic Fixed differential reducing valve produces, the m of unit
H
g: the design suction lift of test pump, the m of unit
H '
g: the setting height(from bottom) of this test bench, the m of unit
H
f2: the hydraulic loss in intake pipe, the m of unit
The present invention has following characteristics: on the performance test bed basis of traditional self-priming pump, increase adjustable freq uency conversion supercharging pump, electronic Fixed differential reducing valve, realize the measurement of high priming stroke self priming pump suction lift.Do not change the as installed height of test pump, by adjustable freq uency conversion supercharging pump and electronic Fixed differential reducing valve are set, can realize the various setting height(from bottom)s of simulation, can meet the demand of various jet pump tests, and drop into without increasing new test bench installation, test process is simple, convenient.
Brief description of the drawings
Accompanying drawing 1 is test stand schematic diagram of the present invention.
Embodiment
Below embodiments of the invention are elaborated, the present embodiment is to implement under prerequisite in technical solution of the present invention, provided detailed mode of execution and concrete implementation process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, this test stand is mainly made up of test pump 1 (comprising fluidic device 7, threeway 2, gate valve 3 and bottom valve 6), adjustable freq uency conversion supercharging pump 5 and electronic Fixed differential reducing valve 9 etc.This test stand Main Function mainly contains return pipe supercharging and intake pipe decompression.Return pipe supercharging is to realize by adjustable freq uency conversion supercharging pump 5, and intake pipe decompression is to realize by electronic Fixed differential reducing valve 9.Adjustable freq uency conversion supercharging pump 5 imports are connected with 4 outlets of blowback water pipe, and outlet is connected with fluidic device 7 sparger imports; Electronic Fixed differential reducing valve 9 imports are told inner pipe upper end with fluidic device 7 literary compositions and are connected, and outlet is connected with 1 import of test pump.
By reference to the accompanying drawings 1, first, test pump 1 is fixed on test stand, setting height(from bottom) is H '
g, need the setting height(from bottom) H simulating
g, determine the lift H of adjustable freq uency conversion supercharging pump 5
z.
To adjustable freq uency conversion supercharging pump 5 lift H
zbe set with following formula:
H
z＝H
g-H′
g-H
f1
H
z: the lift that adjustable freq uency conversion supercharging pump 5 produces, the m of unit
H
g: the design suction lift of test pump 1, the m of unit
H '
g: the as installed height of this test bench, the m of unit
H
f1: the hydraulic loss in return pipe, the m of unit
Secondly the setting height(from bottom) H, simulating as required
g, determine that electronic Fixed differential reducing valve 9 imports and exports the pressure reduction that need to reduce, the pressure drop H that electronic Fixed differential reducing valve 9 is produced
jset.
To electronic Fixed differential reducing valve 9 pressure drop H
jbe set with following formula:
H
j＝H
g-H′
g-H
f2
H
j: the pressure drop that electronic Fixed differential reducing valve 9 produces, the m of unit
H
g: the design suction lift of test pump 1, the m of unit
H '
g: the setting height(from bottom) of this test bench, the m of unit
H
f2: the hydraulic loss in intake pipe, the m of unit
Finally, after setting, can test jet pump.When self-priming pump can illustrate this pump test passes by successful self-priming, otherwise test failure is just described.
The present invention has following characteristics: on the performance test bed basis of traditional self-priming pump, increase adjustable freq uency conversion supercharging pump 5, electronic Fixed differential reducing valve 9, realize the measurement of high priming stroke self priming pump suction lift.Do not change the as installed height of test pump, by adjustable freq uency conversion supercharging pump 5 and electronic Fixed differential reducing valve 9 are set, can realize the various setting height(from bottom)s of simulation, can meet the demand of various jet pump tests, and drop into without increasing test bench installation, test process is simple, convenient.
In the present embodiment, testing Type of pump is JP-505, and the design performance parameter of tested pump is as follows:
Flow 10m
3/ h, lift 80m, power 1.8Kw, sucks bore 25mm, inhales journey H
g=23m.
The setting height(from bottom) of pump is decided to be H '
g=3m, in order to meet the suction journey needs of 23m, needs to utilize adjustable freq uency conversion supercharging pump 5 in return pipe 4, to increase the head of 20m, utilizes electronic Fixed differential reducing valve 9 in intake pipe 8, to reduce head (the line loss H of 20m
f1and H
f2omit, in the time measuring, be as the criterion with actual conditions).
According to the adjustable freq uency conversion supercharging pump 5 lift H of formula (1)
zbe set as 20m.
According to the pressure drop H of the electronic Fixed differential reducing valve 9 of formula (2)
jbe set as 20m, inlet and outlet pressure is poor should be set as 0.2Mpa.
The test stand under this setting can be measured and inhale the dark sucking pump of JP-505 that journey is 23m.
Claims (3)
1. a high priming stroke self priming pump suction lift test bench, is characterized in that: this test stand is mainly made up of test pump (1), adjustable freq uency conversion supercharging pump (5) and electronic Fixed differential reducing valve (9);
Adopt conventional raising platform height, in order to simulate the running state of actual suction lift, on blowback water pipe, increase adjustable freq uency conversion supercharging pump (5) to supplement fluidic device sparger inlet pressure head, increase electronic Fixed differential reducing valve (9) to increase the pressure drop of test pump (1) import;
Adjustable freq uency conversion supercharging pump (5) import is connected with return pipe (4) outlet, and outlet is connected with fluidic device (7) sparger import; Electronic Fixed differential reducing valve (9) import is connected with fluidic device (7) Venturi tube upper end, and outlet is connected with the import of test pump (1).
2. high priming stroke self priming pump suction lift test bench according to claim 1, is characterized in that: the setting height(from bottom) of simulation as required, determine the lift of adjustable freq uency conversion supercharging pump (5), and adjustable freq uency conversion supercharging pump (5) is set.
3. high priming stroke self priming pump suction lift test bench according to claim 1, be further characterized in that: the setting height(from bottom) of simulation as required, determine that electronic Fixed differential reducing valve (9) imports and exports the pressure reduction that need to reduce, electronic Fixed differential reducing valve (9) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210140932.7A CN102913463B (en) | 2012-05-09 | 2012-05-09 | Self-priming height test bed for self-priming pump with high priming travel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210140932.7A CN102913463B (en) | 2012-05-09 | 2012-05-09 | Self-priming height test bed for self-priming pump with high priming travel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102913463A CN102913463A (en) | 2013-02-06 |
| CN102913463B true CN102913463B (en) | 2014-12-17 |
Family
ID=47611978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210140932.7A Expired - Fee Related CN102913463B (en) | 2012-05-09 | 2012-05-09 | Self-priming height test bed for self-priming pump with high priming travel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102913463B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242587A (en) * | 2019-04-30 | 2019-09-17 | 武汉船用机械有限责任公司 | Performance test apparatus for self-lubricating centrifugal pump |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103631992A (en) * | 2013-11-07 | 2014-03-12 | 华南理工大学 | Computing method for flow simulation in self-priming process of self-priming pump |
| CN104564921A (en) * | 2015-01-12 | 2015-04-29 | 西南交通大学 | Assistant oil absorption device |
| CN104912818B (en) * | 2015-06-16 | 2018-05-15 | 合肥工业大学 | A kind of movable pump station |
| CN105403396B (en) * | 2015-12-16 | 2017-10-20 | 江苏大学 | External characteristics cooperates with test system in a kind of pump self-priming process |
| CN111963453B (en) * | 2020-07-24 | 2022-06-24 | 山东省农业机械科学研究院 | Self-priming performance test system and test method for self-priming pump |
| CN113175437B (en) * | 2021-05-08 | 2022-11-11 | 格力大松（宿迁）生活电器有限公司 | Water pump lift testing device and water pump lift testing method |
| CN114704477B (en) * | 2022-04-15 | 2023-09-15 | 中国计量大学 | Self-priming height testing device and method for self-priming pump |
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|---|---|---|---|---|
| CN2069496U (en) * | 1990-02-09 | 1991-01-16 | 福建省机械科学研究院 | High lift water pump for deep well |
| SU1731989A1 (en) * | 1989-07-09 | 1992-05-07 | Барнаульский станкостроительный завод | Stand for testing self-priming pump |
| CN2918549Y (en) * | 2006-06-05 | 2007-07-04 | 蔡可振 | Internal recycle self-pressurized frequency change water-service device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4870579B2 (en) * | 2007-01-11 | 2012-02-08 | 東邦地水株式会社 | Pumping test method and pumping test equipment |
-
2012
- 2012-05-09 CN CN201210140932.7A patent/CN102913463B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1731989A1 (en) * | 1989-07-09 | 1992-05-07 | Барнаульский станкостроительный завод | Stand for testing self-priming pump |
| CN2069496U (en) * | 1990-02-09 | 1991-01-16 | 福建省机械科学研究院 | High lift water pump for deep well |
| CN2918549Y (en) * | 2006-06-05 | 2007-07-04 | 蔡可振 | Internal recycle self-pressurized frequency change water-service device |
Non-Patent Citations (1)
| Title |
|---|
| 射流式自吸离心泵的试验研究;刘建瑞等;《中国农村水利水电》;20070430(第4期);第66-68页 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242587A (en) * | 2019-04-30 | 2019-09-17 | 武汉船用机械有限责任公司 | Performance test apparatus for self-lubricating centrifugal pump |
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|---|---|
| CN102913463A (en) | 2013-02-06 |
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Granted publication date: 20141217 Termination date: 20190509 |