Engine blow-by system testing device

Abstract

This utility model relates to the technical field of aero-engine testing equipment, and discloses a testing device for an engine bleed gas system, comprising: a testing component, including a booster pump, a solenoid valve, a first check valve, a first pressure gauge, and a second pressure gauge; the booster pump is provided with a booster inlet and a booster outlet; the solenoid valve is provided with a solenoid valve inlet and a solenoid valve outlet, a first air pipe is connected between the booster outlet and the solenoid valve inlet, a switching valve is provided on the first air pipe, and the solenoid valve outlet is connected to a second air pipe; the first check valve is disposed on the first air pipe between the switching valve and the booster outlet; the first pressure gauge is disposed on the first air pipe between the switching valve and the booster outlet; and the second pressure gauge is disposed on the second air pipe. This utility model provides a testing device for an engine bleed gas system, which simplifies the testing of the bleed gas system and enables more accurate determination of the cause of the fault.

Description

Technical Field

[0001] This utility model relates to the technical field of aero-engine testing equipment, and in particular to a test device for an engine bleed system. Background Technology

[0002] The V2500 high-pressure compressor bleed gas system for modern civil aircraft engines is designed to improve engine starting performance, prevent engine surge during operation, and increase engine stability. Due to the harsh operating environment and complex structure of this bleed gas system, failures are frequent. To address this issue, aircraft maintenance personnel regularly conduct condition tests on relevant components of the bleed gas system to determine if their operating status meets airworthiness requirements. This allows for the early detection of component performance degradation and the prevention of bleed gas system failures.

[0003] However, current testing of venting systems is complex, prone to errors, and difficult to accurately determine the cause of failure, leading to misdiagnosis and incorrect replacement of parts, resulting in significant waste of aviation materials and affecting work efficiency and troubleshooting accuracy. Utility Model Content

[0004] The purpose of this invention is to provide an engine bleed system testing device that simplifies the testing of the bleed system and enables more accurate determination of the cause of the fault.

[0005] To achieve the above objectives, this utility model provides an engine bleed gas system testing device, comprising:

[0006] The test assembly includes a booster pump, a solenoid valve, a first check valve, a first pressure gauge, and a second pressure gauge.

[0007] The booster pump is provided with a booster inlet and a booster outlet; the solenoid valve is provided with a solenoid valve inlet and a solenoid valve outlet, a first air pipe is connected between the booster outlet and the solenoid valve inlet, a switching valve is provided on the first air pipe, and a second air pipe is connected to the solenoid valve outlet; a first one-way valve is provided on the first air pipe between the switching valve and the booster outlet; a first pressure gauge is provided on the first air pipe between the switching valve and the booster outlet; and a second pressure gauge is provided on the second air pipe.

[0008] Preferably, the test component further includes:

[0009] The first vent valve is located at the end of the second air pipe away from the air outlet of the solenoid valve.

[0010] Preferably, the second air pipe is provided with a first regulating valve.

[0011] Preferably, the test component further includes:

[0012] A power supply is provided, and the power supply is electrically connected to the solenoid valve.

[0013] Preferably, the test component further includes:

[0014] First vent valve;

[0015] A vacuum pump, wherein the vacuum pump is provided with a vacuum inlet and a vacuum outlet;

[0016] A three-way valve is provided with a first port, a second port and a third port. The first port is connected to the booster air inlet. A third air pipe is connected between the second port and the vacuum air outlet. A second one-way valve is provided on the third air pipe. The third port is connected to the atmosphere.

[0017] A first three-way valve is provided with a first valve port, a second valve port and a third valve port. A fourth air pipe is connected between the second valve port and the vacuum inlet. A third air pressure gauge is provided on the fourth air pipe.

[0018] The second conversion three-way valve is provided with a fourth valve port, a fifth valve port and a sixth valve port, and a fifth air pipe is connected between the sixth valve port and the air outlet of the first vent valve.

[0019] The first air tube includes a first branch air tube, a second branch air tube, and a third branch air tube. The first branch air tube is connected between the pressurized air outlet and the first valve port. The second branch air tube is connected between the third valve port and the fourth valve port. The third branch air tube is connected between the fifth valve port and the solenoid valve inlet.

[0020] The switch valve is installed on the second branch gas pipe, and the first pressure gauge is installed on the first branch gas pipe.

[0021] Preferably, the test component further includes:

[0022] The sixth air pipe has one end connected to the fifth air pipe and the other end of the sixth air pipe is equipped with a second vent valve.

[0023] Preferably, the test component further includes:

[0024] The third conversion three-way valve is provided with a seventh valve port, an eighth valve port and a ninth valve port. The ninth valve port is connected to the air inlet of the first vent valve through a seventh air pipe.

[0025] The fifth air pipe includes a fourth branch air pipe and a fifth branch air pipe. The fourth branch air pipe is connected between the sixth valve port and the seventh valve port. The eighth valve port is connected to the outlet of the first vent valve through the fifth branch air pipe.

[0026] Preferably, the test component further includes:

[0027] The sixth trachea has one end connected to the fourth branch trachea and the other end of the sixth trachea is equipped with a second vent valve.

[0028] Preferably, a second regulating valve is provided on the sixth air pipe.

[0029] Preferably, it further includes:

[0030] A test bench on which the test components are mounted, and casters are provided at the bottom of the test bench.

[0031] Compared with the prior art, the beneficial effects of the engine bleed system testing device of this utility model embodiment are as follows:

[0032] During the test, close the switch valve on the first air pipe, start the booster pump to pressurize to the preset value, and observe the values ​​of the first and second pressure gauges after the preset time. If the value of the first pressure gauge is the preset value and the value of the second pressure gauge is 0, it proves that the gas can be discharged from the booster outlet into the first air pipe and sealed between the switch valve and the first one-way valve.

[0033] After opening the switch valve, observe the value of the second pressure gauge after a preset time. If the value of the second pressure gauge is the preset value and there is no obvious pressure drop during the test, it proves that the inlet and outlet of the solenoid valve can be smoothly connected. After the gas passes through the switch valve, it can enter the second air pipe through the solenoid valve and be detected by the second pressure gauge. This proves that the system is not leaking and the solenoid valve is functioning normally, and there is no fault. If the value of the second pressure gauge is 0, it proves that the system is leaking or the inlet and outlet of the solenoid valve cannot be connected, the solenoid valve is malfunctioning, and there is a fault.

[0034] The testing device of this application simplifies the testing of the venting system, can test the function of the solenoid valve, and more accurately determine whether the system is leaking or whether the solenoid valve is malfunctioning. This effectively avoids misjudgment and incorrect replacement of parts, reduces material consumption, and improves work efficiency and troubleshooting accuracy. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the engine bleed system testing device described in this utility model;

[0036] Figure 2 This is a front view of the engine bleed system testing device described in this utility model;

[0037] Figure 3 This is a circuit diagram and piping diagram of the engine bleed system test device described in this utility model;

[0038] In the diagram, 1. Test component; 2. Booster pump; 201. Booster inlet; 202. Booster outlet; 3. Solenoid valve; 301. Solenoid valve inlet; 302. Solenoid valve outlet; 4. First check valve; 5. First pressure gauge; 6. Second pressure gauge; 7. First air pipe; 71. First branch air pipe; 72. Second branch air pipe; 73. Third branch air pipe; 8. Switch valve; 9. Second air pipe; 10. First vent valve; 11. First regulating valve; 12. Power supply; 13. Indicator light; 14. Control switch; 15. First vent valve; 16. Vacuum pump; 161. Vacuum inlet; 162. Vacuum outlet; 17. Adapter three-way valve; 171. First port; 172. Second port; 173. Third port; 18. First conversion three-way valve; 81. First valve port; 182. Second valve port; 183. Third valve port; 19. Second three-way valve; 191. Fourth valve port; 192. Fifth valve port; 193. Sixth valve port; 20. Third air pipe; 21. Second check valve; 22. Fourth air pipe; 23. Third pressure gauge; 24. Fifth air pipe; 241. Fourth branch air pipe; 242. Fifth branch air pipe; 25. Sixth air pipe; 26. Second vent valve; 27. Second regulating valve; 28. Third three-way valve; 281. Seventh valve port; 282. Eighth valve port; 283. Ninth valve port; 29. ​​Seventh air pipe; 30. Stand; 3001. Vertical plate; 3002. Base plate; 31. Casters; 32. Eighth air pipe; 33. Third vent valve; 34. Second vent valve; 35. Pressure regulating valve. Detailed Implementation

[0039] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0040] In the description of this utility model, it should be understood that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 the embodiments of this utility model based on the specific circumstances.

[0041] In the description of this utility model, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," "X-axis direction," "Y-axis direction," and "Z-axis direction," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. Moreover, some of the above terms, in addition to indicating orientation or positional relationship, may also be used to indicate other meanings; for example, the term "upper" may in some cases be used to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0042] Explanation of the English abbreviations used in this application:

[0043] PSI: Pounds per square inch.

[0044] like Figure 1-3 As shown, an engine bleed air system testing device according to an embodiment of the present invention includes: a testing component 1, which includes a booster pump 2, a solenoid valve 3, a power supply 12, a first one-way valve 4, a first pressure gauge 5, and a second pressure gauge 6.

[0045] The booster pump 2 is equipped with a booster inlet 201 and a booster outlet 202; the solenoid valve 3 is equipped with a solenoid valve inlet 301 and a solenoid valve outlet 302, and a first air pipe 7 is connected between the solenoid valve inlet 301 and the booster outlet 202. A switch valve 8 is provided on the first air pipe 7, and a second air pipe 9 is connected to the solenoid valve outlet 302; the power supply 12 is electrically connected to the solenoid valve 3; a first check valve 4 is provided on the first air pipe 7 between the switch valve 8 and the booster outlet 202; a first pressure gauge 5 is provided on the first air pipe 7 between the switch valve 8 and the booster outlet 202; and a second pressure gauge 6 is provided on the second air pipe 9.

[0046] It should be noted that the solenoid valve is a normally open type. When the power is normally off, the air inlet and outlet of the solenoid valve can be connected to allow gas to pass through.

[0047] During the test, the switch valve 8 on the first air pipe 7 is closed, the booster pump 2 is started to pressurize to the preset value, and after the preset time, the values ​​of the first pressure gauge 5 and the second pressure gauge 6 are observed. If the value of the first pressure gauge 5 is the preset value (for example, if the booster pump 2 is started to pressurize to 20 PSI, then the preset value is 20 PSI), and the value of the second pressure gauge 6 is 0, it proves that the gas can be discharged from the booster outlet 202 into the first air pipe 7 and sealed between the switch valve 8 and the first one-way valve 4.

[0048] After opening the switch valve 8, observe the value of the second pressure gauge 6 after a preset time. If the value of the second pressure gauge 6 is the preset value (e.g., 20 PSI) and there is no obvious pressure drop during the test, it proves that the solenoid valve inlet 301 and solenoid valve outlet 302 can be smoothly connected. After passing through the switch valve 8, the gas can enter the second air pipe 9 through the solenoid valve 3 and be detected by the second pressure gauge 6. This proves that the system is not leaking and the solenoid valve 3 is functioning normally, and there is no fault. If the value of the second pressure gauge 6 is 0, it proves that the system is leaking or the solenoid valve inlet 301 and solenoid valve outlet 302 cannot be connected, the solenoid valve 3 is malfunctioning, and there is a fault.

[0049] The testing device of this application makes testing the venting system simpler and can test the function of solenoid valve 3. It can more accurately determine whether the system is leaking air and whether the solenoid valve 3 is malfunctioning, effectively avoiding misjudgment and incorrect replacement of parts, reducing aircraft material consumption, and improving work efficiency and troubleshooting accuracy.

[0050] Furthermore, the booster pump 2 is equipped with an emergency stop button for emergency shutdown. The booster pump 2 is also equipped with a pressure regulating valve 35.

[0051] In this embodiment, the test component 1 further includes a first vent valve 10, which is disposed at the end of the second air pipe 9 away from the solenoid valve outlet 302.

[0052] It should be noted that a first vent valve 10 is installed at the end of the second air pipe 9 away from the solenoid valve outlet 302. When the values ​​of the first pressure gauge 5 and the second pressure gauge 6 are basically equal to the pressure increase value and the values ​​are stable, opening the first vent valve 10 will cause the value of the second pressure gauge 6 to be less than the value of the first pressure gauge 5. This can simulate the situation of air leakage in the pipeline, assist in analyzing and judging the cause of the fault, and improve the troubleshooting performance.

[0053] In this embodiment, the second air pipe 9 is further provided with a first regulating valve 11.

[0054] It should be noted that the second air pipe 9 is equipped with a first regulating valve 11, so that the first regulating valve 11 can cooperate with the first vent valve 10 to adjust the opening of the first vent valve 10, thereby adjusting the amount of air leakage and simulating different amounts of air leakage.

[0055] In this embodiment, the test component 1 further includes a power supply 12, which is electrically connected to the solenoid valve 3.

[0056] It should be noted that, under normal circumstances, when the power supply 12 supplies power to the solenoid valve 3, the solenoid valve 3 is closed internally, and the solenoid valve inlet 301 and the solenoid valve outlet 302 cannot be connected; when the power supply 12 does not supply power to the solenoid valve 3, the solenoid valve 3 is open internally, and the solenoid valve inlet 301 and the solenoid valve outlet 302 can be connected.

[0057] Therefore, before testing, the power supply 12 can be turned on, the switch valve 8 on the first air pipe 7 can be turned off, the booster pump 2 can be started to boost the pressure to the preset value, and after the preset time, the values ​​of the first pressure gauge 5 and the second pressure gauge 6 can be observed. If the value of the first pressure gauge 5 is the preset value and the value of the second pressure gauge 6 is 0, it proves that the gas can be discharged from the booster outlet 202 into the first air pipe 7 and sealed between the switch valve 8 and the first one-way valve 4.

[0058] After opening the switch valve 8, observe the value of the second pressure gauge 6 after a preset time. If the value of the second pressure gauge 6 is 0, it proves that the solenoid valve inlet 301 and the solenoid valve outlet 302 are indeed not connected, and the solenoid valve 3 can be powered normally. If the value of the second pressure gauge 6 is not 0, it proves that the solenoid valve 3 cannot be powered normally.

[0059] The power supply 12 is preferably a transformer, capable of converting 220V AC power into 28V DC power. The solenoid valve 3 operates using 28V DC power.

[0060] Furthermore, a control switch 14 is electrically connected between the power supply 12 and the solenoid valve 3. The power supply 12 can control the opening and closing of the control switch 14 to realize the electrical connection or disconnection between the power supply 12 and the solenoid valve 3.

[0061] Furthermore, it also includes an indicator light 13, which is connected in parallel with the control switch 14. When the control switch 14 is closed, the indicator light 13 lights up; when the control switch 14 is open, the indicator light 13 turns off. Users can determine the opening and closing of the control switch 14 by observing the indicator light 13.

[0062] In this embodiment, the test component 1 further includes: a first vent valve 15, a vacuum pump 16, a three-way valve 17, a first three-way valve 18, and a second three-way valve 19;

[0063] The vacuum pump 16 is provided with a vacuum inlet 161 and a vacuum outlet 162;

[0064] The three-way valve 17 is provided with a first port 171, a second port 172 and a third port 173. The first port 171 is connected to the booster air inlet 201. The second port 172 and the vacuum outlet 162 are connected by a third air pipe 20. The third air pipe 20 is provided with a second one-way valve 21. The third port 173 is connected to the atmosphere.

[0065] The first three-way valve 18 is provided with a first valve port 181, a second valve port 182 and a third valve port 183. A fourth air pipe 22 is connected between the second valve port 182 and the vacuum inlet 161. A third air pressure gauge 23 is provided on the fourth air pipe 22.

[0066] The second conversion three-way valve 19 is provided with a fourth valve port 191, a fifth valve port 192 and a sixth valve port 193, and a fifth air pipe 24 is connected between the sixth valve port 193 and the air outlet of the first vent valve 15.

[0067] The first trachea 7 includes a first branch trachea 71, a second branch trachea 72 and a third branch trachea 73. The first branch trachea 71 is connected between the pressurized air outlet 202 and the first valve port 181. The second branch trachea 72 is connected between the third valve port 183 and the fourth valve port 191. The third branch trachea 73 is connected between the fifth valve port 192 and the solenoid valve inlet 301.

[0068] The switch valve 8 is installed on the second branch air pipe 72, and the first pressure gauge 5 is installed on the first branch air pipe 71.

[0069] It should be noted that the first air pipe 7 is split into a first branch air pipe 71, a second branch air pipe 72, and a third branch air pipe 73. The booster outlet 202 is connected to the first valve port 181 of the first switching three-way valve 18 through the first branch air pipe 71. The third valve port 183 of the first switching three-way valve 18 is connected to the fourth valve port 191 of the second switching three-way valve 19 through the second branch air pipe 72. The fifth valve port 192 of the second switching three-way valve 19 is connected to the inlet port 301 of the solenoid valve through the third branch air pipe 73. Therefore, when the first valve port 181 and the third valve port 183 of the first switching three-way valve 18 are connected, and the fourth valve port 191 and the fifth valve port 192 of the second switching three-way valve 19 are connected, the third port 173 of the switching three-way valve 17 is opened and the second port 172 is closed, which allows external gas to enter the booster pump 2 to generate boosted gas. The boosted gas is transmitted to the solenoid valve 3 through the connected air pipes to test the function of the solenoid valve 3 and whether the system is leaking.

[0070] In order to test the closing function of the vent valve, in the initial state, the first vent valve 15 is open (the normal opening degree is 90 degrees). There is a spring inside the first vent valve 15 that can keep the first vent valve 15 open. During testing, the second valve port 182 and the third valve port 183 of the first switching three-way valve 18 are connected, and the fourth valve port 191 and the sixth valve port 193 of the second switching three-way valve 19 are connected. The switch valve 8 on the first air pipe 7 is closed, the second port 172 of the switching three-way valve 17 is opened, and the third port 173 is closed. The booster pump 2 draws negative pressure gas from the vacuum pump 16 through the third air pipe 20. Since the second valve port 182 of the first switching three-way valve 18 is connected to the vacuum inlet 161 of the vacuum pump 16 through the fourth pipe, the value of the third pressure gauge 23 on the fourth air pipe 22 is observed after a preset time. If the value of the third pressure gauge 23 reaches the preset negative pressure value (for example, if the pressure of the booster pump 2 drawing negative pressure gas from the vacuum pump 16 through the third air pipe 20 is -40 PSI, then the preset negative pressure value is -40 PSI), it proves that the negative pressure gas is sealed in the air pipe between the switch valve 8 and the second one-way valve 21.

[0071] Then, the switch valve 8 is opened. Since the sixth valve port 193 of the second conversion three-way valve 19 is connected to the outlet of the first vent valve 15 through the fifth air pipe 24, if the first vent valve 15 is closed, it proves that the negative pressure in the connected air pipe causes the chamber connected to the outlet of the first vent valve 15 to be evacuated. The pressure difference overcomes the spring force, causing the first vent valve 15 to close. It can be determined that the system is not leaking air and the function of the first vent valve 15 is normal, and the first vent valve 15 has not malfunctioned. If the first vent valve 15 is not closed, it proves that the system is leaking air or the function of the first vent valve 15 is malfunctioning.

[0072] The testing device of this application can perform functional tests on the solenoid valve 3 or the first vent valve 15 by switching the valve ports of the first switching three-way valve 18 and the second switching three-way valve 19, and controlling the opening and closing of the second port 172 or the third port 173 of the switching three-way valve 17. This allows for a more accurate determination of whether there is air leakage in the system and whether there is a fault in the components, effectively avoiding misjudgment and incorrect replacement of parts, reducing material consumption, and improving work efficiency and troubleshooting accuracy.

[0073] Furthermore, the vacuum pump 16 is equipped with a pressure regulating valve 35.

[0074] In this embodiment, the test component 1 further includes a sixth air pipe 25, one end of which is connected to the fifth air pipe 24, and the other end of which is provided with a second venting valve 26.

[0075] It should be noted that one end of the sixth air pipe 25 is connected to the fifth air pipe 24, and the other end of the sixth air pipe 25 is equipped with a second vent valve 26. When the first vent valve 15 is closed under negative pressure, the second vent valve 26 is opened, and external gas will enter the air pipe under pressure difference, resulting in insufficient negative pressure in the air pipe. This can simulate the situation of air leakage in the pipeline, assist in analyzing and judging the cause of the fault, and improve the troubleshooting performance.

[0076] In this embodiment, the test component 1 further includes: a third conversion three-way valve 28, which is provided with a seventh valve port 281, an eighth valve port 282 and a ninth valve port 283. The ninth valve port 283 is connected to the air inlet of the first vent valve 15 through a seventh air pipe 29.

[0077] The fifth trachea 24 includes the fourth branch trachea 241 and the fifth branch trachea 242. The fourth branch trachea 241 is connected between the sixth valve port 193 and the seventh valve port 281. The eighth valve port 282 is connected to the outlet of the first vent valve 15 through the fifth branch trachea 242.

[0078] It should be noted that the fifth trachea 24 is split into a fourth branch trachea 241 and a fifth branch trachea 242. The sixth valve port 193 of the second switching three-way valve 19 is connected to the seventh valve port 281 of the third switching three-way valve 28 through the fourth branch trachea 241. The eighth valve port 282 of the third switching three-way valve 28 is connected to the outlet of the first vent valve 15 through the fifth branch trachea 242, thus opening the seventh valve port 281 and the eighth valve port 282. Therefore, a negative pressure is generated during the test, and the gas in the chamber connected to the outlet of the first vent valve 15 is discharged through the fifth branch trachea 242. The system evacuates the valve, causing the first vent valve 15 to close. After the test is completed and the pressure difference is eliminated, the first vent valve 15 automatically returns to the open position. If the first vent valve 15 does not return to the open position or if you want to increase the reset speed, switch the third conversion three-way valve 28 to open the seventh valve port 281 and the ninth valve port 283. Since the ninth valve port 283 is connected to the air inlet of the first vent valve 15 through the seventh air pipe 29, the negative pressure gas can be delivered to the other chamber of the first vent valve 15 through the seventh air pipe 29, which can accelerate the reset of the first vent valve 15.

[0079] In this embodiment, the test component 1 further includes a sixth air pipe 25, one end of which is connected to the fourth branch air pipe 241, and the other end of which is provided with a second venting valve 26.

[0080] It should be noted that when the fifth trachea 24 is split into the fourth branch trachea 241 and the fifth branch trachea 242, the sixth trachea 25 is connected to the fourth branch trachea 241. A second vent valve 26 is installed at one end of the sixth trachea 25. When the first vent valve 15 is closed under negative pressure, the second vent valve 26 is opened, allowing external gas to enter the trachea under pressure difference, resulting in insufficient negative pressure within the trachea. This simulates a pipeline leak, assisting in analyzing and determining the cause of the fault and improving troubleshooting performance.

[0081] In this embodiment, a second regulating valve 27 is further provided on the sixth air pipe 25.

[0082] It should be noted that the sixth air pipe 25 is equipped with a second regulating valve 27, which can cooperate with the second vent valve 26 to adjust the opening of the second vent valve 26, thereby adjusting the amount of air leakage, so that the first vent valve 15 cannot operate normally or the opening degree of operation becomes smaller, simulating different leakage situations.

[0083] In this embodiment, it further includes: a test stand 30, on which the test component 1 is mounted, and casters 31 are provided at the bottom of the test stand 30.

[0084] It should be noted that the test component 1 is mounted on the test bench 30, and the bottom of the test bench 30 is equipped with casters 31, so that the user can push the test bench 30 to move it, making it convenient to move the test device to various places for training.

[0085] Furthermore, the frame 30 includes a vertical plate 3001 and a base plate 3002. The bottom edge of the vertical plate 3001 is connected to one side of the base plate 3002. The bottom of the base plate 3002 is provided with casters 31. The booster pump 2 and the vacuum pump 16 are installed on the top of the base plate 3002. The first vent valve 15 and the second vent valve 34 are installed on the side of the vertical plate 3001 facing the base plate 3002.

[0086] In this embodiment, it further includes an eighth air pipe 32, one end of which is connected to the first air pipe 7, and the other end of which is provided with a third venting valve 33.

[0087] Furthermore, one end of the eighth trachea 32 is connected to the second branch trachea 72.

[0088] It should be noted that after the test is completed, the third vent valve 33 on the eighth air pipe 32 can be opened to release the residual pressure in the air pipe and protect the safety of the system components.

[0089] In this embodiment, it further includes a second vent valve 34, the air inlet of which is connected to a second air pipe 9.

[0090] It should be noted that when the gas enters the second air pipe 9 after passing through the solenoid valve 3, the gas can enter the second air vent valve 34 because the air inlet of the second vent valve 34 is connected to the second air pipe 9. This is consistent with the structure of the V2500 engine and the simulation effect.

[0091] The working process of this utility model is as follows: During the test, the switch valve 8 on the first air pipe 7 is closed, the booster pump 2 is started to boost the pressure to the preset value, and after the preset time, the values ​​of the first pressure gauge 5 and the second pressure gauge 6 are observed. If the value of the first pressure gauge 5 is the preset value and the value of the second pressure gauge 6 is 0, it proves that the gas can be discharged from the booster outlet 202 into the first air pipe 7 and sealed between the switch valve 8 and the first one-way valve 4.

[0092] After opening the switch valve 8, observe the value of the second pressure gauge 6 after a preset time. If the value of the second pressure gauge 6 is the preset value and there is no obvious pressure drop during the test, it proves that the solenoid valve inlet 301 and the solenoid valve outlet 302 can be smoothly connected. After passing through the switch valve 8, the gas can enter the second air pipe 9 through the solenoid valve 3 and be detected by the second pressure gauge 6. This proves that the system is not leaking and the solenoid valve 3 is functioning normally, and there is no fault. If the value of the second pressure gauge 6 is 0, it proves that the system is leaking or the solenoid valve inlet 301 and the solenoid valve outlet 302 cannot be connected, and the solenoid valve 3 is malfunctioning, and there is a fault.

[0093] In summary, this utility model provides an engine bleed system testing device that simplifies the testing of the bleed system and enables more accurate determination of the cause of the fault.

[0094] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. An engine blow-by system testing apparatus characterized by, include: The test assembly includes a booster pump, a solenoid valve, a first check valve, a first pressure gauge, and a second pressure gauge. The booster pump is provided with a booster inlet and a booster outlet; the solenoid valve is provided with a solenoid valve inlet and a solenoid valve outlet, a first air pipe is connected between the booster outlet and the solenoid valve inlet, a switching valve is provided on the first air pipe, and a second air pipe is connected to the solenoid valve outlet; a first one-way valve is provided on the first air pipe between the switching valve and the booster outlet; a first pressure gauge is provided on the first air pipe between the switching valve and the booster outlet; and a second pressure gauge is provided on the second air pipe.

2. The engine blow-by system test device of claim 1, wherein, The testing components also include: The first vent valve is located at the end of the second air pipe away from the air outlet of the solenoid valve.

3. The engine blow-by system test device of claim 2, wherein, The second air pipe is equipped with a first regulating valve.

4. The engine blow-by system test device of claim 1, wherein, The testing components also include: A power supply is provided, and the power supply is electrically connected to the solenoid valve.

5. The engine blow-by system test device of claim 1, wherein, The testing components also include: First vent valve; A vacuum pump, wherein the vacuum pump is provided with a vacuum inlet and a vacuum outlet; A three-way valve is provided with a first port, a second port and a third port. The first port is connected to the booster air inlet. A third air pipe is connected between the second port and the vacuum air outlet. A second one-way valve is provided on the third air pipe. The third port is connected to the atmosphere. A first three-way valve is provided with a first valve port, a second valve port and a third valve port. A fourth air pipe is connected between the second valve port and the vacuum inlet. A third air pressure gauge is provided on the fourth air pipe. The second conversion three-way valve is provided with a fourth valve port, a fifth valve port and a sixth valve port, and a fifth air pipe is connected between the sixth valve port and the air outlet of the first vent valve. The first air tube includes a first branch air tube, a second branch air tube, and a third branch air tube. The first branch air tube is connected between the pressurized air outlet and the first valve port. The second branch air tube is connected between the third valve port and the fourth valve port. The third branch air tube is connected between the fifth valve port and the solenoid valve inlet. The switch valve is installed on the second branch gas pipe, and the first pressure gauge is installed on the first branch gas pipe.

6. An engine blow-by system test device according to claim 5, wherein, The testing components also include: The sixth air pipe has one end connected to the fifth air pipe and the other end of the sixth air pipe is equipped with a second vent valve.

7. The engine blow-by system test device of claim 5, wherein, The testing components also include: The third conversion three-way valve is provided with a seventh valve port, an eighth valve port and a ninth valve port. The ninth valve port is connected to the air inlet of the first vent valve through a seventh air pipe. The fifth air pipe includes a fourth branch air pipe and a fifth branch air pipe. The fourth branch air pipe is connected between the sixth valve port and the seventh valve port. The eighth valve port is connected to the outlet of the first vent valve through the fifth branch air pipe.

8. The engine blow-by system test device of claim 7, wherein, The testing components also include: The sixth trachea has one end connected to the fourth branch trachea and the other end of the sixth trachea is equipped with a second vent valve.

9. An engine blow-by system test apparatus according to claim 6 or 8, characterised in that, The sixth air pipe is provided with a second adjusting valve.

10. The engine blow-by system test device of claim 1, wherein, Further comprising: A test assembly is installed on the rack, and the bottom of the rack is provided with universal wheels.

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