A space micro-pump thermal vacuum and thermal cycle test system
By designing a space micropump thermal vacuum and thermal cycling test system, and using double O-ring connectors and throttling elements, the problems of media leakage and flow resistance were solved. This system enables the space micropump to operate stably and maintain its sealing performance at the rated operating point. It is easy to disassemble and is suitable for thermal testing under various media and pressures.
Patent Information
- Application Number
- CN202411815676.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2044-12-11
AI Technical Summary
Existing space micropump testing systems suffer from media leakage during high and low temperature tests, making them unable to operate normally. They also cannot simultaneously perform vacuuming and media filling functions, and the flow resistance requirements are not met.
A space micropump thermal vacuum and thermal cycling test system was designed. It adopts components such as thermal cycling components, transfer tank, connectors, hand valves, pressure gauges, vacuum pumps, pressure reducers and gas sources. The combination of double O-ring connectors and throttling elements ensures reliable sealing and enables testing of different flow rates and heads. The filling and vacuuming processes are isolated using filler and drain valves.
It achieves stable operation of the space micropump at the rated operating point, ensures sealing and prevents leakage, is simple to operate and easy to disassemble, and is suitable for thermal testing under various media and pressures.
Smart Images
Figure CN119712526B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a kind of space micro pump test system, specifically to a kind of space micro pump thermal vacuum and thermal cycle test system, and the present application belongs to the field of space technology. BACKGROUND
[0002] Chang'e seven, is the topography of China to moon, material composition, space environment is comprehensively detected mission detector, in order to verify its space micro pump and pump valve assembly environmental adaptability, need to examine the thermal cycle, thermal vacuum and cyclic aging performance of product;Existing test system adopts the system of spherocone structure, due to the sealing spherocone structure is more, reliability is low, in the test test process, medium leakage problem will appear, space micro pump cannot normally run, even lead to test cannot be carried out, and test process cannot meet the requirement of flow resistance, cannot take into account vacuum and medium filling function.
[0003] Therefore, in order to meet the demand of pump valve assembly thermal test, there is an urgent need for a kind of test system that can meet the requirement of flow resistance, and ensure that medium leakage does not occur, while taking into account vacuum and medium filling function.After filling, sealing can be separated, and the product and loop are tested separately. SUMMARY
[0004] The present application is to solve the existing test system in high-low temperature test test process, medium leakage will appear, test system after admission space micro pump cannot normally run, even lead to test cannot be carried out, and test process cannot meet the requirement of flow resistance, cannot take into account vacuum and medium filling function Problem, and then propose a kind of space micro pump thermal vacuum and thermal cycle test system.
[0005] The technical scheme adopted by the present application to solve the above problems is:
[0006] The present application includes thermal cycle assembly, transfer tank, connecting piece, first hand valve, first pressure gauge, vacuum pump, second hand valve, second pressure gauge, pressure reducer and gas source, thermal cycle assembly is connected with first hand valve and second hand valve respectively through connecting piece, first hand valve is connected with first pressure gauge through connecting pipeline, and first pressure gauge is connected with vacuum pump through pipeline;Second hand valve is connected with the long guide pipe joint of transfer tank through pipeline, and the short guide pipe joint of transfer tank is connected with second pressure gauge through pipeline, second pressure gauge is connected to pressure reducer, and pressure reducer is connected with gas source.
[0007] Further, the thermal cycle assembly comprises a first double O-ring joint, an elbow, a throttling assembly, a long pipe, a second double O-ring joint, a first joint base, a tee, a charge and discharge valve, a third double O-ring joint, a second joint base and a fourth double O-ring joint, the first double O-ring joint is connected with the throttling assembly through the elbow, the throttling assembly is connected with one end of the long pipe, the other end of the long pipe is connected with the second double O-ring joint, the second double O-ring joint is connected with the left port of the tee through the first joint base; the right port of the tee is connected with the third double O-ring joint, the third double O-ring joint is connected with the fourth double O-ring joint through the second joint base, the upper port of the tee is connected with the charge and discharge valve, and the charge and discharge valve is connected with the connecting piece.
[0008] Further, the throttling assembly is composed of a plurality of throttling elements which are sequentially welded.
[0009] Further, the transfer tank comprises a tank body, an end cover, a short guide pipe, a long guide pipe and a sealing ring, the end cover is connected with the upper end of the tank body through bolts, and the end cover and the tank body are sealed through the sealing ring; the lower end of the long guide pipe is inserted into the tank body through the end cover, the short guide pipe is inserted into the end cover, and the lower end of the short guide pipe is located at the upper port position of the tank body.
[0010] Further, the first double O-ring joint comprises a joint body, a nut and two O-rings, the nut is sleeved on the right end of the joint body, two O-rings are arranged between the nut and the right end of the joint body from left to right.
[0011] The beneficial effects of the present application are:
[0012] 1. The present application uses the combination of throttling elements to realize the thermal test of space micro-pumps with different flow and head space, and always ensures that the space micro-pump works at the rated operating point;
[0013] 2. The present application uses the charge and discharge valve to ensure that the isolation of the measured product circuit and the filling and vacuumizing pipeline during the vacuumizing and filling process, and ensures the internal sealing of the circuit;
[0014] 3. The present application uses double O-ring joints to ensure reliable sealing, and the high and low temperature alternating process will not produce leakage, and at the same time, the product and the test pipeline are convenient to disassemble and operate simply;
[0015] 4. The present application can be widely applied to the thermal test of space micro-pumps under various media and various working pressures, and has great market competitiveness. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic diagram of the overall structure of the present application;
[0017] Figure 2 is a schematic diagram of the structure of the thermal cycle assembly;
[0018] Figure 3 is a structural schematic diagram of the transfer tank;
[0019] Figure 4 is a structural schematic diagram of the double O-ring joint.
[0020] In the figure, the thermal cycle assembly 1, the transfer tank 2, the connecting piece 3, the first hand valve 4, the first pressure gauge 5, the vacuum pump 6, the second hand valve 7, the second pressure gauge 8, the pressure reducer 9, the gas source 10, the first double O-ring joint 1-1, the elbow pipe 1-2, the first throttling element 1-3, the second throttling element 1-4, the long pipe 1-5, the second double O-ring joint 1-6, the first joint seat 1-7, the tee pipe 1-8, the charge-discharge valve 1-9, the third double O-ring joint 1-10, the second joint seat 1-11, the fourth double O-ring joint 1-12, the tank body 2-1, the end cover 2-2, the short conduit 2-3, the long conduit 2-4, the sealing ring 2-5, the joint body 1-1-1, the nut 1-1-2, the O-shaped sealing ring 1-1-3. DETAILED DESCRIPTION
[0021] The thermal vacuum and thermal cycle test system of the present embodiment is shown in Figure 1 , which includes the thermal cycle assembly 1, the transfer tank 2, the connecting piece 3, the first hand valve 4, the first pressure gauge 5, the vacuum pump 6, the second hand valve 7, the second pressure gauge 8, the pressure reducer 9, and the gas source 10.
[0022] As shown in Figure 2 , the thermal cycle assembly 1 includes the first double O-ring joint 1-1, the elbow pipe 1-2, the throttling assembly, the long pipe 1-5, the second double O-ring joint 1-6, the first joint seat 1-7, the tee pipe 1-8, the charge-discharge valve 1-9, the third double O-ring joint 1-10, the second joint seat 1-11, and the fourth double O-ring joint 1-12. The first double O-ring joint 1-1 is connected with the throttling assembly through the elbow pipe, the throttling assembly is connected with one end of the long pipe 1-5, and the throttling assembly is connected with the elbow pipe 1-2 and the long pipe 1-5 through welding. The other end of the long pipe 1-5 is welded with the second double O-ring joint 1-6, the second double O-ring joint 1-6 is welded with the left port of the tee pipe 1-8 through the first joint seat 1-7. The right port of the tee pipe 1-8 is welded with the third double O-ring joint 1-10, the third double O-ring joint 1-10 is welded with the fourth double O-ring joint 1-12 through the second joint seat 1-11, the upper port of the tee pipe 1-8 is welded with the charge-discharge valve 1-9, and the charge-discharge valve 1-9 is connected with the connecting piece 1-3.
[0023] The use of the charge-discharge valve 1-9 can ensure the isolation of the product loop to be tested from the filling and vacuumizing pipeline during the vacuumizing and filling processes, especially the disassembly of the pipeline after filling, thereby ensuring the internal sealing of the loop.
[0024] As shown in Figure 3 , the transfer tank 2 includes the tank body 2-1 and the end cover 2-2. The tank body 2-1 is connected with the long conduit 2-4 through the short conduit 2-3, and the long conduit 2-4 is connected with the long pipe 1-5 through the sealing ring 2-5.As shown, the transfer tank 2 includes a tank body 2-1, an end cap 2-2, a short conduit 2-3, a long conduit 2-4, and a sealing ring 2-5. The end cap 2-2 is bolted to the upper end of the tank body 2-1, and the end cap 2-2 and the tank body 2-1 are sealed by the sealing ring 2-5. The lower end of the long conduit 2-4 passes through the end cap 2-2 and is inserted into the tank body 2-1. The short conduit 2-3 is inserted into the end cap 2-2, and the lower end of the short conduit 2-3 is located at the upper port of the tank body 2-1.
[0025] The connector 3 includes a pipe fitting and a tee pipe. One end of the pipe fitting is connected to the filler / drain valve 1-9, and the other end is connected to the tee pipe. The other two ends of the tee pipe are connected to the first hand valve 4 and the second hand valve 7, respectively. The first hand valve 4 is connected to the first pressure gauge 5 via a connecting pipe, and the first pressure gauge 5 is connected to the vacuum pump 6 via a pipe. The second hand valve 7 is connected to the long conduit 2-4 of the transfer tank 2 via a pipe, and the short conduit 2-3 of the transfer tank 2 is connected to the second pressure gauge 8 via a pipe. The second pressure gauge 8 is connected to the pressure reducer 9, and the pressure reducer 9 is connected to the gas source 10.
[0026] Preferably, the throttling element is composed of a tapered tube structure, with the tube gradually narrowing from both ends towards the middle. This prevents excessively high flow velocities from creating low-pressure zones that could cause vaporization of the medium. The entire throttling assembly is composed of multiple welded throttling elements. The combined flow resistance of these elements determines the head of the tested product, ensuring it operates under rated conditions.
[0027] Figure 2 In the process, the inner diameter of the first throttling element 1-3 is 1mm and the flow resistance is 50kPa, the inner diameter of the second throttling element is 2mm and the flow resistance is 15kPa, and the two throttling elements are welded together.
[0028] Preferred, such as Figure 4 As shown, the first double O-ring connector 1-1 includes a connector body 1-1-1, a nut 1-1-2, and two O-rings 1-1-3. The nut 1-1-2 is fitted onto the right end of the connector body 1-1-1. Two O-rings 1-1-3 are provided between the nut 1-1-2 and the right end of the connector body 1-1-1. The two O-rings 1-1-3 are arranged sequentially from left to right.
[0029] The first double O-ring connector 1-1, the second double O-ring connector 1-6, the third double O-ring connector 1-10, and the fourth double O-ring connector 1-12 adopt the same structure; the first connector seat 1-7 and the second connector seat 1-11 adopt the same structure. The two O-rings 1-1-3 between the second double O-ring connector 1-6 and the first connector seat 1-7, and between the third double O-ring connector 1-10 and the second connector seat 1-11, ensure reliable sealing at the connector positions, preventing leakage and facilitating disassembly of the product and test pipeline.
[0030] In the installation of the double O-ring joint and the joint seat, the right end of the joint body is inserted into the left end of the joint seat and welded together, and the two O-rings are located between the joint body and the joint seat to realize reliable sealing of the joint position and prevent leakage.
[0031] Preferably, the material of the O-ring is EPDM, which can ensure the high and low temperature requirements of the heat test and ensure reliable sealing without leakage; in addition, the use of the plunger joint facilitates the disassembly of the product and the test pipeline and is simple to operate.
[0032] The present application can realize the rated operating point of the measured pump product according to different combinations of the throttling element, and the sealing is reliable and no leakage occurs during the heat cycle test process. The system has simple structure, easy processing and high sealing reliability, and has certain advantages in the promotion and application in the heat test of space micro-pumps and other power components. The present application can withstand a test environment of-35-70 DEG C, and can meet various harsh space environments. At the same time, the present application can be widely applied to space micro-pump heat test of various media and various working pressures, and has great market competitiveness.
[0033] Working principle
[0034] 1. System vacuumizing;
[0035] The valve assembly 11 of the measured integrated pump is connected with the test system through the first double O-ring joint 1-1 and the fourth double O-ring joint 1-12, after connection, the first hand valve 4 connected with the vacuum pump 6 is opened, the second hand valve 7 connected with the rotary injection tank 2 is closed, the discharge valve 1-9 is opened, and the vacuum pump 6 is started, so that the vacuumizing of the loop system and the measured product can be realized.
[0036] 2. Loop and measured product filling;
[0037] When the vacuum degree in the system reaches below 0.1 Pa, the first hand valve 4 connected with the vacuum pump 6 is closed, the second hand valve 7 connected with the rotary injection tank 2 is opened, and the rotary injection tank 2 is pressurized by using the gas source 10, so that the liquid medium in the rotary injection tank 2 slowly flows into the loop, until the medium completely fills the loop and the measured product. After filling, the pressure of the gas source 10 can be adjusted to realize the pressurization of the entire loop and the measured product, and the performance test under different background pressures can be realized.
[0038] 3. Post-separation heat test:
[0039] The discharge valve 1-9 is closed, and the vacuumizing and filling pipelines are disassembled, so that the remaining fluid loop and the measured product can be separately subjected to heat test.
[0040] 4. Pump operation:
[0041] When the pump is running, the flow resistance of the throttling element is consistent with the head of the rated working point of the pump, so that the pump can be always maintained at the rated working point.
[0042] The present application can realize the thermal test of the power component space micro-pump, and can be applied to the thermal test of the thermal control mechanical pump, and can also be applied to the thermal test system of the on-orbit refueling pump.
[0043] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any simple modification, equivalent replacement and improvement of the above embodiments, which are within the scope of the present application, are still within the protection scope of the present application.
Claims
1. A space micro-pump thermal vacuum and thermal cycle test system, comprising a thermal cycle assembly (1), a transfer tank (2), a connecting piece (3), a first hand valve (4), a first pressure gauge (5), a vacuum pump (6), a second hand valve (7), a second pressure gauge (8), a pressure reducer (9) and a gas source (10), the thermal cycle assembly (1) is connected with the first hand valve (4) and the second hand valve (7) through the connecting piece (3), the first hand valve (4) is connected with the first pressure gauge (5) through a connecting pipeline, and the first pressure gauge (5) is connected with the vacuum pump (6) through a pipeline; the second hand valve (7) is connected with a long guide pipe joint of the transfer tank (2) through a pipeline, a short guide pipe joint of the transfer tank (2) is connected with the second pressure gauge (8) through a pipeline, the second pressure gauge (8) is connected with the pressure reducer (9), and the pressure reducer (9) is connected with the gas source (10); characterized in that: The thermal cycle assembly (1) comprises a first double O-ring joint (1-1), an elbow (1-2), a throttling assembly, a long pipe (1-5), a second double O-ring joint (1-6), a first joint base (1-7), a tee (1-8), a drain valve (1-9), a third double O-ring joint (1-10), a second joint base (1-11) and a fourth double O-ring joint (1-12), the first double O-ring joint (1-1) is connected with the throttling assembly through the elbow, the throttling assembly is connected with one end of the long pipe (1-5), the other end of the long pipe (1-5) is connected with the second double O-ring joint (1-6), the second double O-ring joint (1-6) is connected with the left port of the tee (1-8) through the first joint base (1-7); the right port of the tee (1-8) is connected with the third double O-ring joint (1-10), the third double O-ring joint (1-10) is connected with the fourth double O-ring joint (1-12) through the second joint base (1-11), the upper port of the tee (1-8) is connected with the drain valve (1-9), and the drain valve (1-9) is connected with the connecting piece (3); the two ends of each throttling element pipe body are gradually narrowed from wide to narrow in the middle, the inner diameter of the first throttling element (1-3) is 1mm, the flow resistance is 50kPa, the inner diameter of the second throttling element is 2mm, the flow resistance is 15kPa, and the two throttling elements are cooperatively welded.
2. The system of claim 1, wherein: The transfer tank (2) comprises a tank body (2-1), an end cover (2-2), a short guide pipe (2-3), a long guide pipe (2-4) and a sealing ring (2-5), the end cover (2-2) is connected with the upper end of the tank body (2-1) through bolts, and the end cover (2-2) and the tank body (2-1) are sealed through the sealing ring (2-5); the lower end of the long guide pipe (2-4) is inserted into the tank body (2-1) through the end cover (2-2), the short guide pipe (2-3) is inserted into the end cover (2-2), and the lower end of the short guide pipe (2-3) is located at the upper port position of the tank body (2-1).
3. The system of claim 1, wherein: The first double O-ring joint (1-1) comprises a joint body (1-1-1), a nut (1-1-2) and two O-shaped sealing rings (1-1-3), the nut (1-1-2) is sleeved on the right end of the joint body (1-1-1), two O-shaped sealing rings (1-1-3) are arranged between the nut (1-1-2) and the right end of the joint body (1-1-1), and the two O-shaped sealing rings (1-1-3) are sequentially arranged from left to right.
Citation Information
Patent Citations
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