CN205956018U - Closed flow lift capability test device for pump - Google Patents
Closed flow lift capability test device for pump Download PDFInfo
- Publication number
- CN205956018U CN205956018U CN201620804578.7U CN201620804578U CN205956018U CN 205956018 U CN205956018 U CN 205956018U CN 201620804578 U CN201620804578 U CN 201620804578U CN 205956018 U CN205956018 U CN 205956018U
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- Prior art keywords
- pump
- fluid reservoir
- pipeline
- measured
- pressure
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Abstract
The utility model relates to a closed flow lift capability test device for pump belongs to the pump testing field. The utility model discloses a testing arrangement, including feed liquor pipeline, liquid outlet pipe, liquid storage pot, exhaust pipe, pressurization line and booster pump, exhaust pipe is connected to the gas vent at liquid storage pot front end head center, entry and the export of pump of awaiting measuring is connected bottom the front end through pipeline and liquid storage pot and the rear end lateral wall respectively, the pressure boost mouth at liquid storage pot rear end lateral wall top passes through pressurization line and links to each other with the booster pump, it gets and presses pipe and export to get the pressure to manage to be connected with the entry on the liquid outlet pipe that is close to the pump both ends of awaiting measuring and feed liquor pipeline respectively. The utility model discloses a testing arrangement has avoided the cavitation phenomena emergence, the import and the poor influence that does not receive the pressure boost of outlet pressure of pump, and flow lift capability test is accurate.
Description
Technical field
This utility model is related to a kind of pump closed-type flow lift performance testing device, belongs to pump field tests.
Background technology
Vane pump need to test the flow lift performance curve under rated speed, and the offer that uses for client and analyze and research is reliable
Foundation；Traditional test mode is with open type test system measurement of discharge, lift performance parameter, the export pipeline of pump and inlet tube
Road is all connected with open pond, by the flashboard valve regulating flow in export pipeline, often occurs significantly in big flow
Cavitation phenomenons.Cavitation can make lift be remarkably decreased, and the performance parameter of pump significantly deviates normal value, due to separate out from liquid
A large amount of steam bubbles occupy suction eye runner, and serious cavitation even occurs pump cutout phenomenon, lift and efficiency all much
Less than normal value.
The pump of different specific speed, is caused the form of hydraulic performance decline different by cavitation.Low specific speed pump, due to vane channel
Narrow and long, therefore once there is cavitation, steam bubble is easy to full of whole runner, thus performance curve is in the unexpected form declining.With
Specific speed increases, and leaf road is to wide and short Long-term change trend, thus steam bubble is from developing into full of whole runner one mistake of needs
Transient, the performance curve of corresponding pump is initially slow decline, increases to afterwards and just shows as during a certain flow drastically declining.
Axial flow pump blade inner is few, overlapping little between blade, and always some is in high pressure effect, thus performance curve is in gamut
Slow decline.In multistage pump, because cavitation occurs in chopped-off head, so performance curve suppression ratio single-stage pump is little.Axial-flow pump and mixed flow
Before being decreased obviously occurs in lift flow curve, efficiency may decline pump, so sometimes being declined (such as with efficiency to this pump
1%) determine the critical point that cavitation occurs.
Utility model content
The purpose of this utility model is for solving conventional art when testing flow lift performance, there is cavitation phenomenons impact
The problem of measurement result, and a kind of pump closed-type flow lift performance testing device is provided.
The purpose of this utility model is achieved through the following technical solutions：
A kind of pump of the present utility model closed-type flow lift performance testing device, including water influent pipeline, drain pipe road, storage
Flow container, gas exhaust piping, pressure piping and booster pump；
Fluid reservoir is columnar sealing structure, and the front-end end enclosure center of fluid reservoir has air vent；The front end of fluid reservoir
Have one group of relative liquid outlet in position and inlet with rear end sidewall bottom；The rear end top side wall of fluid reservoir has openings
To the boost port parallel to the cylindrical tangential direction in tank body top；
The air vent at fluid reservoir front-end end enclosure center connects gas exhaust piping；The liquid outlet of fluid reservoir front end side wall bottom passes through
Drain pipe road is connected with the entrance of pump to be measured, and the inlet of fluid reservoir rear end sidewall bottom passes through going out of water influent pipeline and pump to be measured
Mouth is connected；The boost port of fluid reservoir rear end top side wall is connected with booster pump by pressure piping；Near pump two ends to be measured
Entrance pressure pipe and outlet pressure pipe are connected on drain pipe road and water influent pipeline；Flow is also equipped with water influent pipeline
Meter and flow control valve.
A kind of pump closed-type flow lift performance test methods, concrete method of testing is as follows：
1) entrance and exit of pump to be measured is passed through front end side wall bottom and the rear end side wall of pipeline and airtight fluid reservoir
Bottom conduit connects, and makes to be formed enclosed cavity between the entrance and exit of pump to be measured；
2) pass through booster pump to inject pressurized water in fluid reservoir, make pressurized water fill whole enclosed cavity, until fluid reservoir
The gas exhaust piping that front-end end enclosure center connects has the continual outflow of water；
3) then start pump to be measured, make the wheel speed of pump to be measured reach rated speed, and adjust pump discharge end to be measured with
The flow control valve connecting on the connected pipeline of fluid reservoir, makes the flow value at pump discharge end to be measured reach the flow rate test of pump to be measured
Value, the gas that pump to be measured produces when opening constantly is discharged from the gas exhaust piping that fluid reservoir front-end end enclosure center connects；
4) when the gas exhaust piping that fluid reservoir front-end end enclosure center connects has the continual outflow of water again, near to be measured
Pass through respectively on the pipeline at pump two ends to connect entrance pressure pipe and outlet pressure pipe measures the pressure value at pump two ends to be measured, treated
Survey lift performance under this flow for the pump；Then change the flow value at this pump discharge end to be measured, measure the pressure at pump two ends to be measured
Value, obtains lift performance curve under different flow for the pump to be measured.
Described booster pump is placed in the following water at low temperature of liquid level 0.5m；In pump operation process to be measured, due to impeller, the pump housing
With the rubbing action of water, water temperature can be made to be stepped up, make the air being dissolved in water be easier to separate out, bubble occurs vapour occurs
Erosion, makes test curve distortion.Booster pump feedwater adopts water at low temperature, while pressurizeing to system, constantly passes through water at low temperature pair
System is lowered the temperature.
The liquid outlet of front-end and back-end sidewall bottom of described fluid reservoir and inlet opening direction are parallel to tank base
Cylindrical tangential direction.The boost port opening direction of the top side wall of described fluid reservoir is parallel to the cylindrical tangential direction in tank body top.
The liquid from flowing through fluid reservoir can be made to circulate along liquid storage top tank structure, reduce and can produce gas because liquid irregularly stirs
May.
Beneficial effect
Enclosed test system of the present utility model is due to using being enclosed construction, being system boost by booster pump, making
During test, the absolute pressure of pump inlet and outlet is significantly larger than the vapor pressure of water all the time, has abolished the condition of cavitation generation, vapour
Erosion phenomenon is wholly absent.Because booster pump is to increase equal pressure, therefore pump to the inlet ductwork of pump and export pipeline simultaneously
Inlet and outlet pressure differential do not affected by being pressurized, when thus can accurately measure big flow, the lift of pump and efficiency, obtain
To the complete full performance test curve meeting national testing standard, the exploitation for new pump-type and Hydraulic design provide can
The technological means leaned on.
Brief description
Fig. 1 is the vertical view attachment structure figure of this utility model test device；
Fig. 2 is the pipeline connecting figure of fluid reservoir in this utility model test device；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the flow lift performance test curve recording pump in embodiment；
In figure, 1- pump to be measured；2- effusion meter；3- flow control valve 4- fluid reservoir；5- gas exhaust piping；6- pressure piping；7-
Drain pipe road；8- water influent pipeline；9- entrance pressure pipe；10- exports pressure pipe；11- booster pump.
Specific embodiment
With reference to the accompanying drawings and examples content of the present utility model is described further.
Embodiment
Taking the flow lift performance testing certain model pump as a example, using a kind of pump closed-type flow lift of the present utility model
Performance testing device, as Figure 1-3, including water influent pipeline 8, drain pipe road 7, fluid reservoir 4, gas exhaust piping 5, pressure piping 6
With booster pump 11；
Fluid reservoir 4 is columnar sealing structure, and the front-end end enclosure center of fluid reservoir 4 has air vent；Before fluid reservoir 4
End has one group of relative liquid outlet in position and inlet with rear end sidewall bottom；The rear end top side wall of fluid reservoir 4 has out
Mouth is oriented parallel to the boost port of the cylindrical tangential direction in tank body top；
The air vent at fluid reservoir 4 front-end end enclosure center connects gas exhaust piping 5；The liquid outlet of fluid reservoir 4 front end side wall bottom
It is connected with the entrance of pump 1 to be measured by drain pipe road 7, the inlet of fluid reservoir 4 rear end sidewall bottom passes through water influent pipeline 8 and treats
The outlet surveying pump 1 is connected；The boost port of fluid reservoir 4 rear end top side wall is connected with booster pump 11 by pressure piping 6；Close
Entrance pressure pipe 9 and outlet pressure pipe 10 are connected on the drain pipe road 7 at pump 1 two ends to be measured and water influent pipeline 8；In feed liquor
Effusion meter 2 and flow control valve 3 are also equipped with pipeline 8.
A kind of pump closed-type flow lift performance test methods, concrete method of testing is as follows：
1) entrance and exit of pump 1 to be measured is passed through front end side wall bottom and the rear end side of pipeline and airtight fluid reservoir 4
Wall bottom conduit connects, and makes to be formed enclosed cavity between the entrance and exit of pump 1 to be measured；
2) pass through booster pump 11 to inject pressurized water in fluid reservoir 4, make pressurized water fill whole enclosed cavity, until storage
The gas exhaust piping 5 that flow container 4 front-end end enclosure center connects has the continual outflow of water；
3) then start pump 1 to be measured, make the wheel speed of pump 1 to be measured reach rated speed, and adjust pump 1 port of export to be measured
Be connected the flow control valve 3 being connected on pipeline with fluid reservoir 4, makes the flow value of pump 1 port of export to be measured reach the flow of pump 1 to be measured
Test value, the gas that pump 1 to be measured produces when opening constantly is discharged from the gas exhaust piping 5 that fluid reservoir 4 front-end end enclosure center connects；
4) when the gas exhaust piping 5 that fluid reservoir 4 front-end end enclosure center connects has the continual outflow of water again, treat close
Survey and pass through respectively on the pipeline at pump 1 two ends to connect entrance pressure pipe 9 and export the pressure that pressure pipe 10 measures pump 1 two ends to be measured
Value, obtains lift performance under this flow for the pump to be measured；Then change the flow value of this pump 1 port of export to be measured, measure pump 1 to be measured
The pressure value at two ends, obtains lift performance curve under different flow for the pump to be measured, as shown in Figure 4.
Described booster pump 11 is placed in the following water at low temperature of liquid level 0.5m.
The liquid outlet of front-end and back-end sidewall bottom of described fluid reservoir 4 and inlet opening direction are parallel to tank base
Cylindrical tangential direction.The boost port opening direction of the top side wall of described fluid reservoir 4 is parallel to the cylindrical tangential direction in tank body top.
Claims (2)
1. a kind of pump closed-type flow lift performance testing device, is characterized in that：Including water influent pipeline, drain pipe road, fluid reservoir,
Gas exhaust piping, pressure piping and booster pump；
Fluid reservoir is columnar sealing structure, and the front-end end enclosure center of fluid reservoir has air vent；The front end of fluid reservoir and after
End sidewall bottom has one group of relative liquid outlet in position and inlet；The rear end top side wall of fluid reservoir has opening direction and puts down
Row is in the boost port of the cylindrical tangential direction in tank body top；
The air vent at fluid reservoir front-end end enclosure center connects gas exhaust piping；The liquid outlet of fluid reservoir front end side wall bottom is by going out liquid
Pipeline is connected with the entrance of pump to be measured, and the inlet of fluid reservoir rear end sidewall bottom passes through the outlet phase of water influent pipeline and pump to be measured
Even；The boost port of fluid reservoir rear end top side wall is connected with booster pump by pressure piping；Near pump two ends to be measured go out liquid
Entrance pressure pipe and outlet pressure pipe are connected on pipeline and water influent pipeline；Water influent pipeline is also equipped with effusion meter and
Flow control valve；
The liquid outlet of front-end and back-end sidewall bottom of described fluid reservoir and inlet opening direction are cylindrical parallel to tank base
Tangential direction；The boost port opening direction of the top side wall of described fluid reservoir is parallel to the cylindrical tangential direction in tank body top.
2. test device as claimed in claim 1, is characterized in that：Described booster pump is placed on the following water at low temperature of liquid level 0.5m
In.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620804578.7U CN205956018U (en) | 2016-07-28 | 2016-07-28 | Closed flow lift capability test device for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620804578.7U CN205956018U (en) | 2016-07-28 | 2016-07-28 | Closed flow lift capability test device for pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205956018U true CN205956018U (en) | 2017-02-15 |
Family
ID=57973289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620804578.7U Expired - Fee Related CN205956018U (en) | 2016-07-28 | 2016-07-28 | Closed flow lift capability test device for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205956018U (en) |
-
2016
- 2016-07-28 CN CN201620804578.7U patent/CN205956018U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 Termination date: 20180728 |