Air pressure adjusting system for testing APU oil reducing solenoid valve
By setting a first pressure reducing valve, an ultra-micro pressure regulating module, and an actuation test module in the air pressure regulating system, precise air pressure regulation of the oil reducing solenoid valve on the valve mounting seat is achieved, ensuring a stable supply of test air pressures of 0.5 kPa and 28–41 kPa. This solves the problem of inaccurate air pressure regulation in the prior art and enables comprehensive performance testing of the oil reducing solenoid valve.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN AIRLINES ENGINES MAINTENANCE & ENG CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-24
AI Technical Summary
The existing air pressure regulation system cannot accurately regulate and stably supply the two test air pressures of 0.5 kPa and 28-41 kPa for the oil reduction solenoid valve, which affects the detection accuracy and environmental factors, resulting in inaccurate performance testing of the oil reduction solenoid valve.
A pneumatic pressure regulation system is adopted, which includes a main pipeline, a first pressure reducing valve, an ultra-low pressure regulation module, and an actuation test module. The ultra-low pressure regulation module, which consists of a first pressure reducing valve, a second pressure reducing valve, and a needle valve, achieves an ultra-low pressure state of 0.5 kPa. The actuation test module is then switched to achieve an actuation test of 28–41 kPa through a three-way valve.
This invention enables the oil-reducing solenoid valve to continuously receive ultra-low pressure gas of 0.5 kPa on the valve mounting seat for flow performance testing, and can complete actuation performance testing of 28–41 kPa, thus solving the problem of inaccurate gas pressure regulation in the prior art.
Smart Images
Figure CN224162155U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air pressure regulation technology, specifically to an air pressure regulation system for testing an APU oil reduction solenoid valve. Background Technology
[0002] The oil-reducing solenoid valve is mainly used in APU lubrication power units. It is a two-position normally closed solenoid valve with a normal operating voltage of 28V and a working air pressure of 0.5kPa. During cold start of the APU lubrication system, the oil-reducing solenoid valve actuates to connect the booster stage inlet of the lubrication power unit with the air in the gearbox, thereby enabling start-up. During the reciprocating operation of the oil-reducing solenoid valve, its sealing performance, flow performance, and valve core stroke may malfunction due to valve wear and corrosion, spring performance degradation, or armature assembly damage.
[0003] Therefore, it is necessary to periodically test the oil reduction solenoid valve to determine whether its performance is qualified. The actuation test air pressure of the oil reduction solenoid valve is (28~41) kPa, and the flow test air pressure is 0.5 kPa. The existing single air pressure regulation method cannot achieve the regulation of the two test air pressures. Secondly, due to factors such as detection accuracy, environmental factors, and pressure regulation accuracy, the normal pressure regulation method cannot achieve accurate regulation and stable supply of such small pressure due to its lag.
[0004] Based on the above background, the inventors designed a pneumatic pressure regulation system for testing APU oil-reducing solenoid valves, which solves at least one of the above problems, and thus, this application is filed. Utility Model Content
[0005] The purpose of this application is to provide a pneumatic pressure regulation system for testing APU oil-reducing solenoid valves, which solves the problem of the lack of a reliable pneumatic pressure regulation system when performing ultra-micro pressure tests and actuation pneumatic pressure tests on oil-reducing solenoid valves.
[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution:
[0007] This application provides a pneumatic pressure regulation system for testing an APU oil-reducing solenoid valve, including a main pipeline and a valve mounting base disposed on the main pipeline. It also includes a first pressure reducing valve and an ultra-micro pressure regulating module sequentially disposed on the main pipeline along the airflow direction. The valve mounting base is located downstream of the ultra-micro pressure regulating module along the airflow direction of the main pipeline.
[0008] The ultra-micro pressure regulating module includes a second pressure reducing valve and a needle valve arranged sequentially along the airflow direction of the main pipeline;
[0009] It also includes three-way valve A and three-way valve B, as well as an actuation test module for testing the actuation performance of the oil reduction solenoid valve. The actuation test module is connected to the main pipeline through three-way valve A and three-way valve B.
[0010] Optionally, the actuation test module includes a bypass pipeline and a third pressure reducing valve. The third pressure reducing valve is located on the bypass pipeline, and the bypass pipeline is connected to the main pipeline through the three-way valve A and the three-way valve B.
[0011] The three-way valve A is positioned between the first pressure-reducing valve and the second pressure-reducing valve.
[0012] The three-way valve B is positioned between the needle valve and the valve mounting base.
[0013] Optionally, the actuation test module further includes a fourth pressure gauge, which is located between the third pressure reducing valve and the three-way valve B.
[0014] Optionally, a second pressure gauge may also be installed on the main pipeline, located between the first pressure reducing valve and the three-way valve A.
[0015] Optionally, the ultra-micro pressure regulating module also includes an air mass flow meter and a third pressure gauge located between the needle valve and the three-way valve B.
[0016] Optionally, it also includes an air filter installed on the main pipeline, which is located upstream of the first pressure reducing valve along the airflow direction of the main pipeline.
[0017] Optionally, it also includes a switch valve and a first pressure gauge installed on the main pipeline. The switch valve is installed upstream of the first pressure reducing valve along the airflow direction of the main pipeline, and the first pressure gauge is installed between the switch valve and the first pressure reducing valve.
[0018] Optionally, the switching valve is a shut-off valve or a ball valve.
[0019] Optionally, the valve mounting base is provided with a mounting groove for mounting the oil reduction solenoid valve;
[0020] The valve mounting base is also equipped with an air inlet, an air outlet, and a pressure test port that are connected to the mounting groove. The valve mounting base is connected to the main pipeline through the air inlet and the air outlet.
[0021] It also includes a fifth barometer installed on the barometer test port.
[0022] The beneficial effects of this utility model are:
[0023] This application incorporates a first pressure-reducing valve on the main pipeline, along with an ultra-micro pressure regulating module including a second pressure-reducing valve and a needle valve. This allows gas entering the main pipeline from the gas source to be first reduced by the first pressure-reducing valve, and then precisely regulated to an ultra-micro pressure of 0.5 kPa by the second pressure-reducing valve and the needle valve. This ensures a stable supply to the valve mounting base, enabling the oil-reducing solenoid valve, once installed on the valve mounting base, to continuously receive gas at an ultra-micro pressure of 0.5 kPa, facilitating corresponding ultra-micro pressure flow performance testing.
[0024] Meanwhile, by setting up an actuation test module, and connecting the actuation test module to the main pipeline via three-way valves A and B, this application allows the gas flow to be switched to the bypass pipeline of the actuation test module via three-way valves A and B, and then to the valve mounting seat. This enables the oil reducing solenoid valve to be supplied with an actuation test air pressure of 28-41 kPa after it is installed on the valve mounting seat, thereby allowing the oil reducing solenoid valve to transform the ultra-micro pressure performance test into an actuation performance test.
[0025] Therefore, by setting up the first pressure reducing valve, the ultra-micro pressure regulating module and the actuation test module as described above, this application enables the oil reducing solenoid valve to achieve ultra-micro pressure flow performance testing at 0.5 kPa and actuation testing at air pressures of 28 to 41 kPa after it is installed on the valve mounting seat, thus solving the problems of the prior art. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of this application.
[0027] Figure 2 A top view of the valve mounting base in an embodiment of this application.
[0028] Explanation of reference numerals in the attached figures:
[0029] 1-Switch valve, 2-Air filter, 3-First pressure reducing valve, 4-Second pressure reducing valve, 5-Third pressure reducing valve, 6-Three-way valve A, 7-Three-way valve B, 8-Needle valve, 9-Air mass flow meter, 10-First pressure gauge, 11-Second pressure gauge, 12-Third pressure gauge, 13-Fourth pressure gauge, 14-Main pipeline, 15-Bypass pipeline, 16-Valve mounting seat, 161-Mounting groove, 162-Air inlet, 163-Exhaust port, 164-Pressure test port. Detailed Implementation
[0030] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.
[0031] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0034] like Figure 1 and Figure 2 As shown, this embodiment provides a pneumatic pressure regulation system for testing an APU oil-reducing solenoid valve, including a main pipeline 14 and a valve mounting base 16 disposed on the main pipeline 14. It also includes a first pressure reducing valve 3 and an ultra-micro pressure regulating module sequentially disposed on the main pipeline 14 along the airflow direction. The valve mounting base 16 is located downstream of the ultra-micro pressure regulating module along the airflow direction of the main pipeline 14. Wherein:
[0035] The ultra-micro pressure regulating module includes a second pressure reducing valve 4 and a needle valve 8 arranged sequentially along the airflow direction of the main pipeline 14;
[0036] It also includes three-way valves A6 and B7, as well as an actuation test module for testing the actuation performance of the oil reduction solenoid valve. The actuation test module is connected to the main pipeline 14 through three-way valves A6 and B7.
[0037] This embodiment incorporates a first pressure reducing valve 3 on the main pipeline 14, along with an ultra-micro pressure regulating module including a second pressure reducing valve 4 and a needle valve 8. This allows gas to be reduced in pressure by the first pressure reducing valve 3 after entering the main pipeline 14 from the gas source, and then precisely regulated to an ultra-micro pressure of 0.5 kPa by the second pressure reducing valve 4 and the needle valve 8. This ensures a stable supply to the valve mounting seat 16, enabling the oil reducing solenoid valve, once installed on the valve mounting seat 16, to continuously receive gas at an ultra-micro pressure of 0.5 kPa, facilitating corresponding ultra-micro pressure flow performance testing.
[0038] Meanwhile, this embodiment sets up an actuation test module, which is connected to the main pipeline 14 via three-way valves A6 and B7. This allows the gas flow to be switched to the bypass pipeline 15 of the actuation test module via three-way valves A6 and B7, and then to the valve mounting seat 16. After the oil reducing solenoid valve is installed on the valve mounting seat 16, it can be supplied with an actuation test air pressure of 28-41 kPa, thereby enabling the oil reducing solenoid valve to transform the ultra-micro pressure performance test into an actuation performance test.
[0039] Therefore, by setting the first pressure reducing valve 3, the ultra-micro pressure regulating module and the actuation test module as described above, this application enables the oil reducing solenoid valve to be installed on the valve mounting seat 16, so that it can achieve ultra-micro pressure flow performance testing at 0.5 kPa and actuation testing at air pressures of 28 to 41 kPa, thus solving the problems of the prior art.
[0040] Specifically, in this embodiment, as follows: Figure 1 As shown, the actuation test module includes a bypass pipe 15 and a third pressure reducing valve 5. The third pressure reducing valve 5 is installed on the bypass pipe 15, and the bypass pipe 15 is connected to the main pipe 14 through the three-way valve A6 and the three-way valve B7.
[0041] The three-way valve A6 is positioned between the first pressure reducing valve 3 and the second pressure reducing valve 4.
[0042] The three-way valve B7 is disposed between the needle valve 8 and the valve mounting seat 16. In this embodiment, both the three-way valve A6 and the three-way valve B7 are three-way ball valves.
[0043] Specifically, in this embodiment, as follows: Figure 1 As shown, the actuation test module also includes a fourth pressure gauge 13, which is located between the third pressure reducing valve 5 and the three-way valve B7. The fourth pressure gauge 13 can monitor the pressure after adjustment by the third pressure reducing valve 5 in real time to ensure that the pressure adjustment is accurate and in place.
[0044] Specifically, in this embodiment, as follows: Figure 1As shown, it also includes a second pressure gauge 11 installed on the main pipeline 14. The second pressure gauge 11 is located between the first pressure reducing valve 3 and the three-way valve A6. The second pressure gauge 11 can monitor the pressure after adjustment by the first pressure reducing valve 3 in real time to ensure that the pressure adjustment is accurate and in place.
[0045] Specifically, in this embodiment, as follows: Figure 1 As shown, the ultra-micro pressure regulating module also includes an air mass flow meter 9 and a third pressure gauge 12 located between the needle valve 8 and the three-way valve B7. The air mass flow meter 9 and the third pressure gauge 12 can monitor the flow and pressure after the second pressure reducing valve 4 and the needle valve 8 are regulated, ensuring that an ultra-micro pressure airflow of 0.5 kPa can be stably output to the valve mounting seat 16.
[0046] Specifically, in this embodiment, as follows: Figure 1 As shown, it also includes an air filter 2 installed on the main pipeline 14. The air filter 2 is installed upstream of the first pressure reducing valve 3 along the airflow direction of the main pipeline 14. The air filter 2 can filter the air entering the main pipeline 14 and prevent the valves on the main pipeline 14 from being blocked after long-term use.
[0047] Specifically, in this embodiment, as follows: Figure 1 As shown, it also includes a switch valve 1 and a first pressure gauge 10 installed on the main pipeline 14. The switch valve 1 is installed upstream of the first pressure reducing valve 3 along the airflow direction of the main pipeline 14. The first pressure gauge 10 is installed between the switch valve 1 and the first pressure reducing valve 3. The switch valve 1 can control the airflow of the entire main pipeline 14, while the first pressure gauge 10 facilitates the monitoring of the gas pressure entering the main pipeline 14.
[0048] Specifically, in this embodiment, as follows: Figure 1 As shown, the switching valve 1 is a ball valve. Technicians can replace it with other valves as needed, but examples will not be given here.
[0049] Specifically, in this embodiment, as follows: Figure 2 As shown, the valve mounting base 16 is provided with a mounting groove 161 for mounting the oil reduction solenoid valve;
[0050] The valve mounting base 16 is also provided with an air inlet 162, an air outlet and a pressure test port 164 that are connected to the mounting groove 161. The valve mounting base 16 is connected to the main pipeline 14 through the air inlet 162 and the air outlet.
[0051] It also includes a fifth pressure gauge (not shown in the figure) installed on the pressure test port 164, and a valve mounting seat 16, which can repeatedly test multiple oil reduction solenoid valves of the same model, making it convenient for operators to test.
[0052] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.
Claims
1. A pneumatic pressure regulating system for APU fuel solenoid valve testing, comprising: It includes a main pipeline (14) and a valve mounting seat (16) installed on the main pipeline (14), and also includes a first pressure reducing valve (3) and an ultra-micro pressure regulating module sequentially installed on the main pipeline (14) along the airflow direction. The valve mounting seat (16) is located downstream of the ultra-micro pressure regulating module along the airflow direction of the main pipeline (14), wherein: The ultra-micro pressure regulating module includes a second pressure reducing valve (4) and a needle valve (8) arranged sequentially along the airflow direction of the main pipeline (14); It also includes a three-way valve A (6) and a three-way valve B (7), as well as an actuation test module for testing the actuation performance of the oil reduction solenoid valve. The actuation test module is connected to the main pipeline (14) through the three-way valve A (6) and the three-way valve B (7).
2. The air pressure regulating system for testing an APU oil-reducing solenoid valve according to claim 1, wherein The actuation test module includes a bypass pipe (15) and a third pressure reducing valve (5). The third pressure reducing valve (5) is located on the bypass pipe (15). The bypass pipe (15) is connected to the main pipe (14) through the three-way valve A (6) and the three-way valve B (7). The three-way valve A (6) is positioned between the first pressure reducing valve (3) and the second pressure reducing valve (4). The three-way valve B (7) is located between the needle valve (8) and the valve mounting seat (16).
3. The air pressure regulating system for testing an APU oil-reducing solenoid valve according to claim 2, wherein The actuation test module also includes a fourth pressure gauge (13), which is located between the third pressure reducing valve (5) and the three-way valve B (7).
4. The air pressure regulating system for testing an APU oil-reducing solenoid valve according to claim 1, wherein, It also includes a second pressure gauge (11) installed on the main pipeline (14), which is located between the first pressure reducing valve (3) and the three-way valve A (6).
5. The air pressure regulating system for testing an APU oil-reducing solenoid valve according to claim 1, wherein, The ultra-micro pressure regulating module also includes an air mass flow meter (9) and a third pressure gauge (12) located between the needle valve (8) and the three-way valve B (7).
6. The air pressure regulating system for testing an APU oil-reducing solenoid valve according to claim 1, wherein It also includes an air filter (2) installed on the main pipeline (14), which is located upstream of the first pressure reducing valve (3) along the airflow direction of the main pipeline (14).
7. The air pressure regulation system for testing an APU oil-reducing solenoid valve according to claim 1, characterized in that, It also includes a switch valve (1) and a first pressure gauge (10) installed on the main pipeline (14). The switch valve (1) is installed upstream of the first pressure reducing valve (3) along the airflow direction of the main pipeline (14), and the first pressure gauge (10) is installed between the switch valve (1) and the first pressure reducing valve (3).
8. The air pressure regulating system for testing an APU oil-reducing solenoid valve according to claim 7, wherein, The switching valve (1) is a shut-off valve or a ball valve.
9. The air pressure regulating system for testing an APU oil-reducing solenoid valve according to claim 1, wherein, The valve mounting base (16) is provided with a mounting groove (161) for mounting the oil reduction solenoid valve; The valve mounting base (16) is also provided with an air inlet (162), an air outlet and a pressure test port (164) that are connected to the mounting groove (161). The valve mounting base (16) is connected to the main pipeline (14) through the air inlet (162) and the air outlet. It also includes a fifth barometer installed on the barometer test port (164).