Quick response pressure control test device for aero-engine valve mechanism

Abstract

The invention discloses a quick response pressure control test device for an aero-engine valve mechanism. The quick response pressure control test device comprises a first pressure control branch, a second pressure control branch and a third pressure control branch, the second pressure control branch, the second precise pressure reducing valve and the second stop valve are connected in series; a third pressure control branch, a third precise pressure reducing valve and a third stop valve are connected in series; the first pressure control branch, the second pressure control branch and the third pressure control branch are connected in parallel, and the input ends of the pressure control branches are connected with a main pressure supply system through a main stop valve on one hand and connected with a first energy accumulator on the other hand. The output end of the pressure control branch is connected with a to-be-tested deflation valve of the to-be-tested product; the input end of the pressure control branch is further connected with the second energy accumulator through a fourth precise pressure reducing valve. Instantaneous pressure reduction and instantaneous pressure increase of the valve in a short time are achieved in a pure mechanical mode, and compared with a traditional servo pump method, pressure adjustment response time and test pressure can be accurately controlled.

Description

TECHNICAL FIELD

[0001] The application relates to an aero-engine valve mechanism quick-response pressure control test device and belongs to the technical field of aero-engine maintenance. BACKGROUND

[0002] The performance test of an aero-engine valve needs to simulate the quick change of pressure under actual working conditions in a very short time, including instantaneous pressure reduction from high pressure to low pressure and instantaneous pressure increase from low pressure to high pressure, and the traditional servo pump method is difficult to meet the response speed and precision requirements. SUMMARY

[0003] In view of the above prior art, the application provides an aero-engine valve mechanism quick-response pressure control test device which adopts multiple structures to realize the instantaneous pressure response control of the engine valve and achieves safe and accurate test detection of the engine valve.

[0004] The application is implemented through the following technical scheme: An aero-engine valve mechanism quick-response pressure control test device comprises the following: A first pressure control branch, a first precision pressure reducing valve and a first stop valve are connected in series, and the pressure value of the first precision pressure reducing valve is set as F1; A second pressure control branch, a second precision pressure reducing valve and a second stop valve are connected in series, and the pressure value of the second precision pressure reducing valve is set as F2; A third pressure control branch, a third precision pressure reducing valve and a third stop valve are connected in series, and the pressure value of the third precision pressure reducing valve is set as F3; The first pressure control branch, the second pressure control branch and the third pressure control branch are connected in parallel, the input end of the pressure control branch is connected with a main pressure supply system through a main stop valve and is connected with a first accumulator, and the output end of the pressure control branch is connected with a product to be tested. The input end of the pressure control branch is further connected with a second accumulator through a fourth precision pressure reducing valve, and the pressure value of the fourth precision pressure reducing valve is set as F4; A fourth stop valve is further connected in series between the output end of the third precision pressure reducing valve and the output end of the fourth precision pressure reducing valve.

[0005] Preferably, a medium heat exchange mechanism is connected in series on a pressure control main line formed by connecting the main pressure supply system with the main stop valve.

[0006] Preferably, the first accumulator and the second accumulator are respectively connected with a safety valve.

[0007] Preferably, the output end of the first pressure control branch is connected with a first pressure relief valve.

[0008] Preferably, the first energy accumulator is also connected with a second pressure relief valve.

[0009] The present application has the beneficial effects: the present application adopts the main pressure supply system, the medium heat exchange mechanism, the energy accumulator, the precise pressure reducing valve and other structures to realize the instantaneous pressure reduction (F3→F4) and the instantaneous pressure increase (F2→F1) of the valve in a short time in a pure mechanical way, compared with the traditional servo pump method, the pressure regulation response time and the test pressure can be accurately controlled, the explosion risk can be reduced, the low-cost explosion prevention can be realized, the device is suitable for various test media such as aviation kerosene and lubricating oil, and therefore the device can be used for testing the aviation engine fuel system mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0011] Figure 1 The present application is a schematic diagram of the embodiment.

[0012] In the figure, 1 is a main pressure supply system, 2 is a stop valve I, 3 is a medium heat exchange mechanism, 4 is a stop valve II, 5 is a stop valve III, 6 is a one-way valve I, 7.1 is a first filter, 7.2 is a second filter, 8 is a first energy accumulator, 9 is a pressure gauge I, 10 is a first safety valve, 11 is a second pressure relief valve, 12.1 is a first precise pressure reducing valve, 12.2 is a first pressure gauge, 12.3 is a first stop valve, 13.1 is a second precise pressure reducing valve, 13.2 is a second pressure gauge, 13.3 is a second stop valve, 13.4 is a one-way valve II, 14.1 is a third precise pressure reducing valve, 14.2 is a third pressure gauge, 14.3 is a third stop valve, 15.1 is a fourth precise pressure reducing valve, 15.2 is a fourth pressure gauge, 15.3 is a one-way valve III, 15.4 is a fourth stop valve, 16 is a second energy accumulator, 17 is a second safety valve, 18 is a first pressure relief valve, 19 is a pressure gauge II, 20 is a stop valve IV, and 21 is a gas release valve. DETAILED DESCRIPTION

[0013] The embodiments of the present application will be described in detail below with reference to the drawings.

[0014] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0015] The present embodiment provides a kind of aviation engine valve mechanism fast response pressure control test device, comprising the following: In the first pressure control branch, the first precision pressure reducing valve 12.1 is connected in series with the first shut-off valve 12.3, and the pressure value of the first precision pressure reducing valve 12.1 is set to F1; In the second pressure control branch, the second precision pressure reducing valve 13.1 and the second shut-off valve 13.3 are connected in series, and the pressure value of the second precision pressure reducing valve 13.1 is set to F2; In the third pressure control branch, the third precision pressure reducing valve 14.1 and the third shut-off valve 14.3 are connected in series, and the pressure value of the third precision pressure reducing valve 14.1 is set to F3; The first pressure control branch, the second pressure control branch, and the third pressure control branch are connected in parallel. The input end of the pressure control branch is connected to the main pressure supply system 1 through the main shut-off valve on one hand, and to the first accumulator 8 on the other hand; the output end of the pressure control branch is connected to the vent valve 21 of the product under test. The input end of the pressure control branch is also connected to the second accumulator 16 via the fourth precision pressure reducing valve 15.1, and the pressure value of the fourth precision pressure reducing valve 15.1 is set to F4. A fourth shut-off valve 15.4 is connected in series between the output end of the third precision pressure reducing valve 14.1 and the output end of the fourth precision pressure reducing valve 15.1.

[0016] The main pressure supply system 1 is the foundation of the entire device in terms of pressure and medium, responsible for providing a stable and clean pressure source. The connection relationships of the core components are as follows: The main pressure supply system 1 provides the device with a raw pressure source of 0-35MPa, and its output end is directly connected to the shut-off valve I2. The shut-off valve I2 acts as a "switch" between the main pressure supply system and the subsequent modules, controlling whether the raw pressure enters the downstream system by opening and closing it. It is the main control node for pressure supply.

[0017] The test medium passing through the shut-off valve I2 flows directly into the medium heat exchange mechanism 3; the function of the medium heat exchange mechanism 3 is to reduce the medium temperature and reduce the pressure deviation in the subsequent system caused by temperature fluctuations.

[0018] After heat exchange, the medium enters the main circuit switching unit composed of shut-off valve II4 and shut-off valve III5. Through different on / off combinations, the two valves switch the main circuit medium flow direction to ensure that the medium can accurately enter the subsequent pressure stabilization and filtration stages.

[0019] After switching to the main line, the medium first passes through check valve I6. Check valve I6 only allows the medium to flow in one direction, preventing the subsequent system pressure from flowing back to the main line and ensuring the stability of the main line pressure. Subsequently, the medium flows sequentially into the first filter 7.1 and the second filter 7.2, which together filter impurities in the medium to prevent impurities from entering precision components and causing blockage or damage.

[0020] The filtered cleaning medium is directly injected into the first accumulator 8, and the core role of the first accumulator 8 is to store the medium and maintain an initial pressure of 5 MPa, providing a stable pressure reserve for subsequent rapid response pressure control.

[0021] A pressure gauge 9 is connected to the output end or body of the first accumulator 8, which monitors the initial pressure inside the accumulator 8 in real time, providing visual pressure data for the operator to ensure that the initial pressure is within the set range of 5 MPa.

[0022] The first safety valve 10 is directly connected to the first accumulator 8, and its set pressure is higher than the initial pressure of 5 MPa of the first accumulator 8; when the pressure of the accumulator 8 abnormally rises beyond the safety range, the first safety valve 10 automatically opens to release pressure, avoiding damage to the system due to overpressure.

[0023] The second pressure relief valve 11 is a normally closed stop valve, one end of which is connected to the first accumulator 8, and the other end leads to an external pressure relief channel; it is only opened when the system needs active pressure relief, such as at the end of a test or during equipment maintenance, manually releasing the pressure of the first accumulator 8 and the downstream system, and belongs to the passive safety control component.

[0024] In this embodiment, four sets of precision pressure reducing valves and supporting components are used to achieve instantaneous switching of the valve pressure from high to low (1.96 MPa→0.29 MPa) and from low to high (0.18 MPa→4 MPa), as follows: I. Pressure reduction control group: realizes instantaneous switching of valve pressure from high to low The 5 MPa pressure source of the first accumulator 8 is connected to the third precision pressure reducing valve 14.1, which precisely adjusts the pressure to 1.96 MPa; The output end of the third precision pressure reducing valve 14.1 is connected to the third stop valve 14.3, which serves as a pressure reduction pilot switch; when opened, it can deliver 1.96 MPa pressure to the air release valve 21, causing the air release valve 21 to rise to 1.96 MPa; when closed, it cuts off the path between the third precision pressure reducing valve 14.1 and the air release valve 21, maintaining the 1.96 MPa pressure of the air release valve 21.

[0025] The pressure of the first accumulator 8 is also connected to the fourth precision pressure reducing valve 15.1, which adjusts the pressure to 0.29 MPa; The output end of the fourth precision pressure reducing valve 15.1 is connected to the one-way valve III 15.3, which prevents the pressure of the second accumulator 16 from flowing back to the fourth precision pressure reducing valve 15.1, ensuring the stability of the output pressure of the fourth precision pressure reducing valve 15.1; One-way valve III 15.3 connects the second accumulator 16 downstream, the second accumulator 16 stores the 0.29 MPa pressure delivered by the fourth precision pressure reducing valve 15.1, forming a low-pressure reserve; The output end of the second accumulator 16 is connected to the fourth stop valve 15.4, and the other end of the fourth stop valve 15.4 is directly connected to the air release valve 21; when instantaneous pressure reduction is needed, the fourth stop valve 15.4 is opened within 1-2 s, and the 1.96 MPa pressure of the air release valve 21 and the 0.29 MPa pressure of the second accumulator 16 are instantaneously balanced, realizing rapid reduction of the valve pressure.

[0026] The output end of the third precision pressure reducing valve 14.1 is connected to the third pressure gauge 14.2, which monitors the 1.96 MPa pressure adjusted by the third precision pressure reducing valve 14.1 in real time; The output end of the fourth precision pressure reducing valve 15.1 is connected to the fourth pressure gauge 15.2, which monitors the 0.29 MPa pressure adjusted by the fourth precision pressure reducing valve 15.1 in real time; The second accumulator 16 is connected to the second safety valve 17 and the first pressure relief valve 18: the second safety valve 17 prevents the pressure of the second accumulator 16 from exceeding the limit, and the first pressure relief valve 18 is a manual pressure relief channel for the second accumulator 16; The second accumulator 16 is also connected to the pressure gauge II 19, which monitors the 0.29 MPa pressure inside in real time.

[0027] II. Boost control group: realize the instantaneous switching of the valve pressure from low to high The 5 MPa pressure source of the first accumulator 8 is connected to the second precision pressure reducing valve 13.1, which adjusts the pressure to 0.18 MPa; The output end of the second precision pressure reducing valve 13.1 is connected to the second stop valve 13.3, which serves as a boost pilot switch; when opened, the pressure is delivered to the air release valve 21 through one-way valve II 13.4, causing the pressure of the air release valve 21 to drop to 0.18 MPa; one-way valve II 13.4 can prevent the pressure of the air release valve 21 from flowing back to the second precision pressure reducing valve 13.1; when the second stop valve 13.3 is closed, the path between the second precision pressure reducing valve 13.1 and the air release valve 21 is cut off, maintaining the 0.18 MPa pressure of the air release valve 21.

[0028] The pressure of the first accumulator 8 is also connected to the first precision pressure reducing valve 12.1, which adjusts the pressure to 4 MPa; The output end of the first precision pressure reducing valve 12.1 is connected with the first stop valve 12.3, and the other end of the first stop valve 12.3 is directly connected with the air release valve 21; when instant pressure increase is needed, the first stop valve 12.3 is opened within 1-2s, the 0.18MPa pressure of the air release valve 21 is instantaneously balanced with the 4MPa pressure output by the first precision pressure reducing valve 12.1, so that the pressure of the air release valve 21 is rapidly increased.

[0029] The output end of the first precision pressure reducing valve 12.1 is connected with the first pressure gauge 12.2, and the 4MPa pressure adjusted by the first precision pressure reducing valve 12.1 is monitored in real time. The output end of the second precision pressure reducing valve 13.1 is connected with the second pressure gauge 13.2, and the 0.18MPa pressure adjusted by the second precision pressure reducing valve 13.1 is monitored in real time.

[0030] The above is only a specific embodiment of the present application, and cannot limit the scope of the application. Therefore, the replacement of equivalent components or equivalent changes and modifications made within the scope of the present application should still fall within the scope of the present application. In addition, the technical features in the present application can be freely combined with each other, and the technical features can be freely combined with each other.

Claims

1. A test device for rapid response pressure control of aero-engine valve mechanism, characterized in that... Including the following: In the first pressure control branch, the first precision pressure reducing valve (12.1) and the first shut-off valve (12.3) are connected in series, and the pressure value of the first precision pressure reducing valve (12.1) is set to F1; In the second pressure control branch, the second precision pressure reducing valve (13.1) and the second shut-off valve (13.3) are connected in series, and the pressure value of the second precision pressure reducing valve (13.1) is set to F2; In the third pressure control branch, the third precision pressure reducing valve (14.1) and the third shut-off valve (14.3) are connected in series, and the pressure value of the third precision pressure reducing valve (14.1) is set to F3; The first pressure control branch, the second pressure control branch, and the third pressure control branch are connected in parallel. The input end of the pressure control branch is connected to the main pressure supply system (1) through the main shut-off valve on one hand, and to the first accumulator (8) on the other hand; the output end of the pressure control branch is connected to the vent valve (21) of the product under test. The input end of the pressure control branch is also connected to the second accumulator (16) via the fourth precision pressure reducing valve (15.1), and the pressure value of the fourth precision pressure reducing valve (15.1) is set to F4; A fourth shut-off valve (15.4) is connected in series between the output end of the third precision pressure reducing valve (14.1) and the output end of the fourth precision pressure reducing valve (15.1).

2. The rapid response pressure control test device for aero-engine valve mechanism according to claim 1, characterized in that: A medium heat exchange mechanism (3) is connected in series on the pressure control main line formed by the connection between the main pressure supply system (1) and the main line shut-off valve.

3. The rapid response pressure control test device for aero-engine valve mechanism according to claim 1 or 2, characterized in that: The first accumulator (8) and the second accumulator (16) are respectively connected to the safety valve.

4. The rapid response pressure control test device for aero-engine valve mechanism according to claim 1, characterized in that: The output end of the first pressure control branch is connected to the first pressure relief valve (18).

5. The rapid response pressure control test device for an aero-engine valve mechanism according to claim 1 or 2, characterized in that: The first accumulator (8) is also connected to the second pressure relief valve (11).

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