Test device for pumps

Abstract

The application provides a testing device for a pump, and belongs to the technical field of equipment testing. The testing device comprises a cold drying device, a measuring cup, a control switch, a measuring cup, a water storage tank and a gas supply system. The cold drying device is communicated with the testing pump, the testing pump is communicated with the measuring cup, the measuring cup is communicated with the measuring cup or the water storage tank through the control switch, the gas supply system is communicated with the measuring cup, and the water storage tank is communicated with the cold drying device. The water vapor mixture is formed by the cold drying device, the uniform water vapor state under the working state of the condensate pump is realized, the water vapor mixture is introduced into the testing pump, and the flow performance test is carried out in the measuring cup. The measuring cup is communicated with the water storage tank through the control switch, and the life test is carried out through the loop formed by the water storage tank and the cold drying device. The testing device can meet the performance test and life test requirements of the condensate pump.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of equipment testing, and relates to the testing technology of a pump of a product in the aerospace industry, in particular to a pump testing device. BACKGROUND

[0002] The water pump testing device is a scientific instrument used in the field of mechanical engineering, and its function is to test the performance and reliability of a water pump, including but not limited to the head / flow characteristic curve, power / flow characteristic curve, efficiency / flow characteristic curve and net positive suction head characteristic curve of the water pump.

[0003] In the field of aerospace industry, the performance and life test of a condensate pump are required, which mainly provides a ground simulation medium working environment for the condensate pump, and tests the ability of the condensate pump in the entire life cycle, intermittent operation or working cycle. However, the suction medium of the condensate pump is a variable proportion of water vapor mixture, and there is no device in the prior art that meets the testing requirements of the condensate pump. Therefore, it is urgent to design a special and reliable performance and life testing device according to the testing requirements and later needs of the condensate pump. SUMMARY

[0004] In view of the problem that there is no performance and life testing device for the condensate pump in the aerospace industry in the prior art, the present application provides a pump testing device.

[0005] The present application designs a testing device that can meet the performance and life testing requirements of the condensate pump to meet the testing requirements of the condensate pump. The specific technical scheme is as follows:

[0006] The pump testing device comprises a cold drying device, a measuring cup, a control switch, a measuring cup, a water storage tank and a gas supply system. The cold drying device is in communication with the testing pump. The testing pump is in communication with the measuring cup. The measuring cup is in communication with the measuring cup or the water storage tank through the control switch. The gas supply system is in communication with the measuring cup. The water storage tank is in communication with the cold drying device.

[0007] Further limited, the cold drying device comprises a water distribution disc, a water absorbing sponge, a water leakage disc, an air suction cavity and a shell. The water distribution disc, the water absorbing sponge, the water leakage disc and the air suction cavity are all arranged in the shell. The water storage tank is in communication with the water distribution disc. The water distribution disc is in communication with the water leakage disc through the water absorbing sponge. The water leakage disc is in communication with the air suction cavity. The air suction cavity is in communication with the testing pump.

[0008] Further limited, the cold drying device further comprises a third filter. The water distribution disc is in communication with the water absorbing sponge through the third filter.

[0009] Further limited, the air suction cavity is provided with a one-way valve in communication therewith. The one-way valve is in communication with the water storage tank.

[0010] Further limited, the control switch includes an adjusting switch, a first switch and a second switch, the measuring cup is communicated with the adjusting switch, the adjusting switch is communicated with the measuring cup through the first switch, or the adjusting switch is communicated with the water storage tank through the second switch.

[0011] Further limited, the pressure sensor is connected on the measuring cup; the test pump is arranged on the pump support, and a conductive plate is arranged between the test pump and the pump support.

[0012] Further limited, the air suction cavity is communicated with the test pump through a first filter.

[0013] Further limited, the one-way valve is communicated with the water distribution disc through the water supply pump.

[0014] Further limited, the air supply system comprises a pressure reducing valve and a second filter, and the pressure reducing valve is communicated with the measuring cup through the second filter.

[0015] Further limited, the water distribution disc is a curved structure with a top upward protrusion, and a water distribution hole is arranged on the water distribution disc.

[0016] Compared with the prior art, the pump test device has the beneficial effects that:

[0017] 1. The pump test device comprises a cold drying device, a measuring cup, a control switch, a measuring cup, a water storage tank and an air supply system. The cold drying device forms a water vapor mixture, realizes uniform water vapor state in the working state of the condensate pump, and the water vapor mixture is introduced into the test pump for flow test. Then, the water vapor mixture flows into the measuring cup. When the flow performance test is needed, the measuring cup is communicated with the measuring cup through the control switch, and the flow performance test is carried out in the measuring cup. When the service life test is needed, the measuring cup is communicated with the water storage tank through the control switch, and the service life test is carried out through the loop formed by the water storage tank and the cold drying device. The air supply system introduces air into the water storage tank, which can meet the test requirements of the condensate pump performance test and the service life test. The air supply system is a reaction formed by the system when working, and the test pump needs to overcome this reaction force for testing.

[0018] 2. The cold drying device comprises a water distribution disc, a water absorption sponge, a water leakage disc, an air suction cavity and a shell. The water distribution disc uniformly disperses and sprays water to the lower structure (water absorption sponge). The water absorption sponge is used for absorbing the sprayed liquid and forming a porous water-containing structure to prepare for the water vapor mixture state during the test. The liquid absorbed by the water absorption sponge flows to the water leakage disc, and the liquid in the water leakage disc overflows to the air suction cavity. The air suction cavity is a combination of an upper air suction cavity and a lower ring groove structure. The upper air suction cavity is used for adjusting air suction during the test, and the lower ring groove structure is used for storing the overflow liquid. The gas and liquid in the upper air suction cavity are mixed to form a water vapor mixture, which flows into the test pump.

[0019] 3, the water distribution disc is communicated with the water absorbing sponge through the third filter, and the liquid sprayed is filtered through the third filter.

[0020] 4, the one-way valve is communicated with the air suction cavity, the one-way valve is communicated with the water storage tank, and the liquid is discharged in time when overflow occurs in the air suction cavity.

[0021] 5, the pressure sensor is connected to the measuring cup, the pressure in the measuring cup is measured through the pressure sensor; the test pump is arranged on the pump support, and the test pump is fixed through the pump support; the conductive plate is arranged between the test pump and the pump support, the test pump is grounded through the conductive plate, and the safety of the test pump is ensured.

[0022] 6, the air suction cavity is communicated with the test pump through the first filter, and the variable proportion water vapor mixture is filtered through the first filter to ensure the cleanliness of the water vapor mixture entering the test pump.

[0023] 7, the one-way valve is communicated with the water distribution disc through the water supply pump, the water in the water storage tank is conveniently flowed to the cold and dry device through the water supply pump, and the cold and dry device, the test pump, the measuring cup and the water storage tank form a circulating loop. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure diagram of the test device of the pump of the application;

[0025] Figure 2 It is the structure diagram of the cold and dry device;

[0026] Among them, 1-cold and dry device, 2-first filter, 3-test pump, 4-pump support, 5-pressure sensor, 6-measuring cup, 7-regulating switch, 8a-first switch, 8b-second switch, 9-measuring cup, 10-water storage tank, 11-water supply pump, 12-pressure reducing valve, 13-second filter, 14-water distribution disc, 15-third filter, 16-water absorbing sponge, 17-water leakage disc, 18-air suction cavity, 19-one-way valve, 20-housing, 21-conductive plate. DETAILED DESCRIPTION

[0027] The technical scheme of the application will be further explained and described below in combination with the drawings and examples, but the application is not limited to the following described embodiments.

[0028] Example

[0029] Reference Figure 1The test device of the pump in the embodiment comprises a cold drying device 1, a measuring cup 6, a control switch, a measuring cup 9, a water storage tank 10 and a gas supply system. The gas supply system provides clean low-pressure gas formed by factory air source through two-stage pressure reduction and filtration. The cold drying device 1 is communicated with the test pump 3. The test pump 3 is communicated with the measuring cup 6. The measuring cup 6 is communicated with the measuring cup 9 or the water storage tank 10 through the control switch. The gas supply system is communicated with the measuring cup 6. The water storage tank 10 is communicated with the cold drying device 1. When the measuring cup 6 is communicated with the measuring cup 9 through the control switch, the flow characteristic test is performed. When the measuring cup 6 is communicated with the water storage tank 10 through the control switch, the service life test is performed. Specifically, the outlet of the cold drying device 1 is communicated with the inlet of the test pump 3. The outlet of the test pump 3 is communicated with the liquid inlet of the measuring cup 6. The outlet of the measuring cup 6 is communicated with the inlet of the measuring cup 9 or the inlet of the water storage tank 10 through the control switch. The outlet of the water storage tank 10 is communicated with the inlet of the cold drying device 1. The outlet of the gas supply system is communicated with the gas inlet of the measuring cup 6.

[0030] Referring to Figure 2 The cold drying device 1 comprises a water distribution disc 14, a water absorption sponge 16, a water leakage disc 17, an air suction cavity 18 and a shell 20. The water distribution disc 14, the water absorption sponge 16, the water leakage disc 17 and the air suction cavity 18 are arranged in the shell 20. Preferably, the water distribution disc 14, the water absorption sponge 16, the water leakage disc 17 and the air suction cavity 18 are sequentially arranged from top to bottom along the shell 20. The water storage tank 10 is communicated with the water distribution disc 14. The water distribution disc 14 is communicated with the water leakage disc 17 through the water absorption sponge 16. The water leakage disc 17 is communicated with the air suction cavity 18. The air suction cavity 18 is communicated with the test pump 3. Specifically, the outlet of the water storage tank 10 is communicated with the inlet of the water distribution disc 14. The liquid from the outlet of the water leakage disc 17 is mixed with the gas from the gas supply system in the air suction cavity 18 to form a water vapor mixture for the test of the test pump 3.

[0031] The cold drying device 1 further comprises a third filter 15. The water distribution disc 14 is communicated with the water absorption sponge 16 through the third filter 15. Specifically, the outlet of the water distribution disc 14 is communicated with the inlet of the third filter 15. The outlet of the third filter 15 is communicated with the water absorption sponge 16.

[0032] The air suction cavity 18 is communicated with a one-way valve 19. The one-way valve 19 is communicated with the water storage tank 10. Specifically, the outlet of the one-way valve 19 is communicated with the inlet of the water storage tank 10. The one-way valve 19 is used to recycle the overflow water in the water leakage disc 17 into the water storage tank 10.

[0033] The control switch comprises an adjusting switch 7, a first switch 8a and a second switch 8b. The measuring cup 6 is communicated with the adjusting switch 7. The adjusting switch 7 is communicated with the measuring cup 9 through the first switch 8a or the adjusting switch 7 is communicated with the water storage tank 10 through the second switch 8b. Specifically, the adjusting switch 7 is a three-way valve used to adjust whether the measuring cup 6 is communicated with the measuring cup 9 or the water storage tank 10 according to the test requirement.

[0034] The pressure sensor 5 is connected to the measuring cup 6, and is used to detect the pressure of the measuring cup 6. The test pump 3 is arranged on the pump support 4, and the pump support 4 is used to fix the test pump 3. The conductive plate 21 is arranged between the test pump 3 and the pump support 4, and is used to ground the test pump 3.

[0035] The suction cavity 18 is communicated with the test pump 3 through the first filter 2. Specifically, the outlet of the suction cavity 18 is communicated with the inlet of the first filter 2, and the outlet of the first filter 2 is communicated with the inlet of the test pump 3.

[0036] The one-way valve 19 is communicated with the water distribution disc 14 through the water supply pump 11. Specifically, the outlet of the one-way valve 19 is communicated with the inlet of the water supply pump 11, and the outlet of the water supply pump 11 is communicated with the inlet of the water distribution disc 14.

[0037] The air supply system comprises a pressure reducing valve 12 and a second filter 13, and the pressure reducing valve 12 is communicated with the measuring cup 6 through the second filter 13. Specifically, the outlet of the pressure reducing valve 12 is communicated with the inlet of the second filter 13, and the outlet of the second filter 13 is communicated with the gas inlet of the measuring cup 6.

[0038] The water distribution disc 14 is a curved surface structure with the top protruding upward, which is convenient for water flow. The water distribution disc 14 is provided with water distribution holes, and preferably, three circles of annular water distribution holes are arranged on the water distribution disc 14, and the three circles of water distribution holes are concentrically arranged along the center of the water distribution disc 14.

[0039] Further specifically, the test pump 3 is installed on the pump support 4, and a grounded copper conductive plate, i.e., the conductive plate 21, is arranged between the two to ensure reliable grounding of the test pump 3; the test pump 3 inlet is communicated with the cold drying device 1 outlet, and a 40 μm first filter 2 is arranged therebetween to filter the variable proportion water vapor mixture to ensure the cleanliness of the water vapor mixture entering the test pump 3; the cold drying device 1 and the test pump 3 are tested in terms of flow, the cold drying device 1 outlet is arranged to be 100 mm-150 mm higher than the test pump 3 inlet to ensure that the liquid level difference can eliminate the fluid resistance of the water vapor mixture to the first filter 2 and ensure that the two have zero liquid level; the test pump 3 outlet is directly communicated with the metering cup 6 inlet, and the metering cup 6 is further provided with a pressure measuring port, a pressure charging port and an outlet; the pressure measuring port is directly connected with a pressure sensor 5, and the pressure sensor 5 is a piezoresistive pressure sensor for pressure measurement; the pressure charging port is communicated with a gas source, and the low-pressure gas source is changed into clean 0.01-0.07 MPa gas through a pressure reducing valve 12 and a second filter 13; the outlet is communicated with a water storage tank 10 through an adjusting switch 7 and a second switch 8b, a shunt tee is arranged between the adjusting switch 7 and the second switch 8b, and a first switch 8a and a measuring cup 9 are arranged; the adjusting switch 7 is used for counter-pressure adjustment of the metering cup 6 and matches the outlet pressure and flow of the test pump 3, the first switch 8a and the second switch 8b are used for manual switching of the test device life test and flow performance test, and the measuring cup 9 is used for measurement during the flow performance test; the metering cup 6 is made of transparent organic glass and has a volume of 5 L, which ensures that 80% of the gas volume cavity is used for outlet pressure buffering and release per unit time to compensate for the insufficient reverse overflow pressure stabilizing capacity caused by the pressure reducing valve 12 of the pressure charging port; the metering cup 6 inlet is lower than the test pump 3 outlet to ensure smooth flow of the outlet medium and prevent the formation of flow resistance; the cold drying device 1 has a one-inlet and two-outlet structure, the top of which is an inlet, and pure water is sprayed to the top end of the cold drying device 1 by a water supply pump 11 from the water storage tank 10, one end outlet enters the test pump 3 through the first filter 2, and the other end outlet returns to the water storage tank 10 to complete overflow backflow.

[0040] The top end of the cold drying device 1 is provided with a water distribution tray 14 which is a circular convex structure and is provided with three concentric circles of uniformly distributed water distribution holes at the top end for uniformly spraying the water to the lower structure (third filter 15); the third filter 15 is arranged between the water distribution tray 14 and the water absorbing sponge 16, and the third filter 15 is arranged in the form of a paper fiber filter which is repeatedly folded, and a larger filtering area is used to filter the sprayed liquid of the water distribution tray 14; the water absorbing sponge 16 is used for absorbing the sprayed liquid and forms a porous water-containing structure to prepare for the water-vapor mixed state during the test; the lower end of the water absorbing sponge 16 is provided with a water leakage tray 17 for discharging the overflow liquid of the water absorbing sponge 16 to the air suction cavity 18; the air suction cavity 18 is arranged between the water leakage tray 17 and the shell 20, and the air suction cavity 18 is combined with the upper air suction cavity and the lower annular groove structure, the upper air suction cavity is used for adjusting the air suction during the test, and the lower annular groove structure is used for storing the overflow liquid; the left end of the air suction cavity 18 is provided with a one-way valve 19, and the air suction cavity 18 is an adjustable overflow structure which is used for adjusting the water-vapor mixed ratio during the test after the water absorbing sponge 16 is adsorbed; the gap between the top of the air suction cavity and the water leakage tray 17 is not greater than 1 mm, so as to prevent the gap from being too large to affect the water-vapor mixed ratio adjustment, and the combination of the air suction cavity and the water leakage tray 17 increases the outlet suction area, so as to prevent local vacuumization and uneven water-vapor mixing ratio; all the above are installed in the shell 20.

[0041] The metering cup 6 adopts a counter-pressure adjustment mode to simulate the load demand at the outlet of the condensate pump.

[0042] The working principle of the test device of the pump is as follows: the water medium is quantitatively extracted from the water storage tank 10 by the water supply pump 11 and supplied to the cold drying device 1, the water medium in the cold drying device 1 is stored in the water absorbing sponge 16 through the third filter 15 until the medium is saturated, and the excess medium is discharged back to the water storage tank 10 through the water leakage tray 17; when the test pump 3 works, the water-vapor mixed medium is sucked out from the air suction cavity 18 of the cold drying device 1, the medium is stored, metered and stored after test by the metering cup 6 at the outlet of the test pump 3, low-pressure clean gas is filled into the metering cup 6 through the pressure reducing valve 12 and the second filter 13, and the load provided by the system when the test pump 3 works is simulated; the adjustment switch 7 and the first switch 8a arranged at the lower end of the metering cup 6 are respectively used for switching the system circulation work and single work state.

Claims

1. A testing device for a pump, characterized in that The device comprises a cold drying device (1), a measuring cup (6), a control switch, a measuring cup (9), a water storage tank (10) and a gas supply system, the cold drying device (1) is communicated with a test pump (3), the test pump (3) is communicated with the measuring cup (6), the measuring cup (6) is communicated with the measuring cup (9) or the water storage tank (10) through the control switch, the gas supply system is communicated with the measuring cup (6), and the water storage tank (10) is communicated with the cold drying device (1). The cold drying device (1) comprises a water distribution disc (14), a water absorption sponge (16), a water leakage disc (17), an air suction cavity (18) and a shell (20), the water distribution disc (14), the water absorption sponge (16), the water leakage disc (17) and the air suction cavity (18) are arranged in the shell (20), the water storage tank (10) is communicated with the water distribution disc (14), the water distribution disc (14) is communicated with the water leakage disc (17) through the water absorption sponge (16), the water leakage disc (17) is communicated with the air suction cavity (18), and the air suction cavity (18) is communicated with the test pump (3).

2. The testing apparatus for a pump according to claim 1, wherein The cold drying device (1) further comprises a third filter (15), and the water distribution disc (14) is communicated with the water absorption sponge (16) through the third filter (15).

3. The testing apparatus for a pump of claim 1, wherein, The air suction cavity (18) is communicated with a one-way valve (19), and the one-way valve (19) is communicated with the water storage tank (10).

4. The testing apparatus for a pump of claim 1, wherein, The control switch comprises an adjusting switch (7), a first switch (8a) and a second switch (8b), the measuring cup (6) is communicated with the adjusting switch (7), the adjusting switch (7) is communicated with the measuring cup (9) through the first switch (8a), or the adjusting switch (7) is communicated with the water storage tank (10) through the second switch (8b).

5. The testing apparatus for a pump of claim 1, wherein, A pressure sensor (5) is connected to the measuring cup (6); the test pump (3) is arranged on a pump support (4), and a conductive plate (21) is arranged between the test pump (3) and the pump support (4).

6. The testing apparatus for a pump of claim 1, wherein, The air suction cavity (18) is communicated with the test pump (3) through a first filter (2).

7. The testing apparatus for a pump of claim 3, wherein, The one-way valve (19) is communicated with the water distribution disc (14) through a water supply pump (11).

8. The testing apparatus for a pump of claim 1, wherein, The gas supply system comprises a pressure reducing valve (12) and a second filter (13), and the pressure reducing valve (12) is communicated with the measuring cup (6) through the second filter (13).

9. The testing apparatus for a pump of claim 2, wherein, The water distribution disc (14) is a curved surface structure with a top upward protrusion, and a water distribution hole is arranged on the water distribution disc (14).

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