A multifunctional aviation lubricating oil pump test bench

Abstract

The present invention belongs to the technical field related to lubricating oil pump detection, and discloses a multifunctional aviation lubricating oil pump test bench, which includes a main oil tank and an oil-gas mixing oil tank, and the aviation lubricating oil pump as a test object is arranged between the two; wherein the oil suction port of the aviation lubricating oil pump is connected to the bottom of four oil-gas mixing oil tanks respectively via four-way oil supply pipelines, and the oil return port of the aviation lubricating oil pump is connected to the top of the main oil tank respectively via two-way oil return pipelines; in addition, a fatigue loading circuit is provided between the oil return port of the aviation lubricating oil pump and the main oil tank, and an oil-gas mixing circuit is provided between the main oil tank and each oil-gas mixing oil tank. Through the present invention, the requirements of multiple test items such as fatigue life test, oil-gas mixing test, high-altitude performance test, ground performance test, etc. of lubricating oil pumps of different specifications can be effectively met, and the above tests can be completed by installing the tested lubricating oil pump once, which significantly improves the test effect and accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field related to lubricating oil pump detection, and more specifically, relates to a multifunctional aviation lubricating oil pump test bench. Background Art

[0002] Aviation lubricating oil pump is one of the important components of aircraft lubricating oil system. It has the characteristics of light weight, compact structure, one shaft and multiple stages, high temperature resistance, high speed, and working in vacuum environment. It is mainly used for the delivery and recovery of lubricating oil in engine bearings and transmission gears. Its quality is directly related to the flight safety of aircraft. In the process of scientific research, the lubricating oil pump needs to complete its performance test and fault cause analysis under different working conditions.

[0003] However, the existing equipment cannot simultaneously meet the requirements of lubricating oil pump fatigue life test, oil-gas mixing test, high-altitude performance test, and ground performance test. When testing the lubricating oil pump, it is often necessary to disassemble and assemble it multiple times on different test benches, which has low work efficiency and may cause inaccurate test results.

[0004] Accordingly, there is an urgent need in the art to make further improvements in order to better meet the specific requirements of multifunctional, high-precision and high-efficiency testing of aviation lubricating oil pumps. Summary of the invention

[0005] In view of the above defects or needs of the prior art, the purpose of the present invention is to provide a multifunctional aviation lubricating oil pump test bench, in which the circuit structure and mutual setting mode of the entire test bench are redesigned by fully combining the structural characteristics and performance testing requirements of the aviation lubricating oil pump itself, so that it can effectively meet the requirements of lubricating oil pump fatigue life test, oil-gas mixing test, high-altitude performance test, ground performance test, etc. in a compact structure and easy to operate manner, and at the same time has the advantages of high efficiency, high precision and good adaptability.

[0006] To achieve the above object, according to the present invention, a multifunctional aviation lubricating oil pump test bench is provided, the test bench comprises a main oil tank and an oil-gas mixing oil tank, the aviation lubricating oil pump as a test object is arranged between the main oil tank and the oil-gas mixing oil tank, and is characterized in that:

[0007] The oil suction port of the aviation lubricating oil pump is connected to the bottom of the four oil-gas mixing tanks via four oil supply pipelines, and each oil supply pipeline is connected in series with a pipeline heater, a temperature transmitter, a flow meter, a regulating valve and a pressure transmitter, thereby providing the aviation lubricating oil pump with a certain ratio of oil-gas mixed medium and providing feedback on the working status of each oil suction port;

[0008] The oil return port of the aviation lubricating oil pump is connected to the top of the main oil tank via two oil return pipelines, so as to transport the oil-gas mixture back to the main oil tank;

[0009] In addition, a fatigue loading circuit is provided between the oil return port of the aviation lubricating oil pump and the main oil tank, and an oil-gas mixing circuit is provided between the main oil tank and each of the oil-gas mixing tanks.

[0010] As a further preference, for the fatigue loading circuit, an oil suction filter, a booster pump and a temperature transmitter are sequentially connected in series on it; in addition, a full-flow solenoid valve and a relief valve connected in parallel to each other are preferably provided between the fatigue loading circuit and the main oil tank, wherein by controlling the opening and closing rhythm of the full-flow solenoid valve and the set pressure of the relief valve, the booster pump provides an adjustable circulating pulse pressure for the return oil port of the aviation lubricating oil pump.

[0011] As a further preference, the oil-gas mixing circuit is preferably composed of an air mixing circuit and an oil mixing circuit, wherein a throttle valve, a pressure transmitter, a flow meter and a nozzle are connected in series in sequence between the booster pump and each of the oil-gas mixing tanks to form an oil mixing circuit; and a throttle valve and a gas flow meter are connected in series in sequence between the air cavity of the main tank and the air cavity of each of the oil-gas mixing tanks to form an air mixing circuit.

[0012] As a further preference, a compressed air source, a pressure regulating filter, a vacuum pump and a regulating valve are preferably connected in series in sequence between the top of the main fuel tank and the top of each of the oil-gas mixing tanks, wherein the vacuum pump is used to evacuate the main fuel tank to form a negative pressure to simulate a high-altitude state, the regulating valve regulates the vacuum pressure of the main fuel tank, the compressed air source is used to increase the air pressure in the main fuel tank, and the pressure regulating filter is used to adjust the air pressure to meet the conditions for ground performance testing of an aviation lubricating oil pump.

[0013] As a further preference, the main oil tank is preferably designed as a closed cylindrical structure according to the vacuum container.

[0014] As a further preference, each of the oil-gas mixing tanks is preferably designed as a closed cylindrical structure according to a vacuum container, and its bottom is preferably designed as a cone.

[0015] In general, the above technical solution conceived by the present invention has the following technical advantages compared with the prior art:

[0016] (1) The present invention redesigns the structure and mutual arrangement of the entire test bench, especially by rationally designing each key component and scientifically setting the connection relationship between each key component. It can simulate the working conditions of multiple models of tested lubricating oil pumps in many aspects by adjusting the oil pressure, temperature, flow rate, vacuum degree, oil-gas mixing ratio, fatigue test pressure and beat of the tested lubricating oil pump, and has wide applicability;

[0017] (2) The present invention further adjusts the pressure of the fatigue loading circuit overflow valve and the opening and closing rhythm of the full-flow solenoid valve, and the pressure pump provides an adjustable cyclic pulse pressure for the oil return port of the tested lubricating oil pump, thereby completing the fatigue life test with high efficiency and high precision;

[0018] (3) The present invention can further accurately control the oil-gas mixing ratio in the oil-gas mixing tank by adjusting the opening of the throttle valves on the air mixing circuit and the oil mixing circuit in the oil-gas mixing circuit, simulate the high-altitude working state of the tested lubricating oil pump, and complete its oil-gas mixing test;

[0019] (4) The multifunctional aviation lubricating oil pump test bench of the present invention has a compact overall structure and is easy to operate. The tested lubricating oil pump can complete the above-mentioned various tests after one installation, which significantly reduces the workload of disassembly and assembly. Therefore, it is particularly suitable for specific application scenarios such as aviation lubricating oil pump testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the entire structure of a multifunctional aviation lubricating oil pump test bench according to a preferred embodiment of the present invention;

[0021] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0022] 1- Main fuel tank, 2- Oil-gas mixing tank, 3- Aviation lubricating oil pump;

[0023] 10-pressure transmitter, 11-nozzle, 12-drive motor, 13-relief valve, 14-return oil throttle valve, 15-gear box, 16-compressed air source, 17-pressure regulating filter, 18-vacuum pump, 19-cooler, 20-regulating valve, 21-relief valve, 22-full flow solenoid valve, 23-liquid level meter, 41-return oil filter, 42-suction oil filter, 43-coarse filter, 44-fine filter, 45-high precision filter, 51-circulation pump, 52 -boosting pump, 61-electric heater, 62-pipeline heater, 71-flow meter, 72-gas flow meter, 73-flow meter, 74-flow meter, 81-regulating valve, 82-throttle valve of air mixing circuit, 83-throttle valve of oil mixing circuit, 91-temperature transmitter, 92-temperature transmitter, 93-temperature transmitter, 94-temperature transmitter, 101-pressure transmitter, 102-pressure transmitter, 103-pressure transmitter, 241-check valve, 242-check valve. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Figure 1 FIG. 1 is a schematic diagram of the entire structure of a multifunctional aviation lubricating oil pump test bench according to a preferred embodiment of the present invention. Figure 1 As shown, the test bench mainly includes a main oil tank 1 and an oil-gas mixing tank 2. An aviation lubricating oil pump 3 as a test object is arranged between the main oil tank 1 and the oil-gas mixing tank 2, which will be explained in detail one by one below.

[0026] See also Figure 1 The oil suction port of the aviation lubricating oil pump 3 is connected to the bottom of the four oil-gas mixing tanks 2 via four oil supply pipelines, and for each oil supply pipeline, a pipeline heater 62, a temperature transmitter 91, a flow meter 74, a regulating valve 81 and a pressure transmitter 101 are connected in series in sequence, thereby providing the aviation lubricating oil pump 3 with a certain ratio of oil-gas mixed medium and feeding back the working status of each oil suction port; the oil return port of the aviation lubricating oil pump 3 is connected to the top of the main oil tank 1 via two oil return pipelines, thereby being used to transport the oil-gas mixed medium back to the main oil tank 1.

[0027] More specifically, the oil suction port of the aviation lubricating oil pump 3 in the present invention can be connected to the bottom of four oil-gas mixing tanks 2 respectively via four oil supply pipelines. The bottom of the oil-gas mixing tank 2 to the aviation lubricating oil pump 3 is connected in series with a pipeline heater 62, a temperature transmitter 91, a flow meter 74, a regulating valve 81, and a pressure transmitter 101. In this way, each oil supply pipeline provides a certain ratio of oil-gas mixed medium to the aviation lubricating oil pump, and provides real-time feedback on the working status of each of its oil suction ports. The throttle valve 81 is used to control the resistance of the current oil circuit.

[0028] In addition, a fatigue loading circuit is provided between the oil return port of the aviation lubricating oil pump 3 and the main oil tank 1 , and an oil-gas mixing circuit is provided between the main oil tank 1 and each of the oil-gas mixing tanks 2 .

[0029] More specifically, for the fatigue loading circuit, an oil suction filter 42, a booster pump 52 and a temperature transmitter 94 are connected in series in sequence; in addition, a full-flow solenoid valve 22 and a relief valve 21 connected in parallel to each other are preferably provided between the fatigue loading circuit and the main oil tank 1, wherein by controlling the opening and closing rhythm of the full-flow solenoid valve 22 and the set pressure of the relief valve 21, the booster pump 52 provides an adjustable circulating pulse pressure for the return oil port of the aviation lubricating oil pump 3.

[0030] As for the oil-gas mixing circuit, it is preferably composed of an air mixing circuit and an oil mixing circuit, wherein a throttle valve 83, a pressure transmitter 10, a flow meter 73 and a nozzle 11 are connected in series in sequence between the booster pump 52 and each of the oil-gas mixing tanks 2, thereby forming an oil mixing circuit; and a throttle valve 82 and a gas flow meter 72 are connected in series in sequence between the air cavity of the main tank and the air cavity of each of the oil-gas mixing tanks 2, thereby forming an air mixing circuit.

[0031] More specifically, the nozzle 11 can achieve uniform mixing of the oil and air in the oil-gas mixing tank, the throttle valve 83 can adjust the injection amount at the nozzle 11, and the injection amount of the current circuit is fed back by the flow meter 73. In addition, the air cavity of the main tank 1 is connected to the air cavity between each oil-gas mixing tank 2, and the throttle valve 82 and the gas flow meter 72 are connected in series in sequence, wherein the throttle valve 82 can control the air supply in the oil-gas mixing tank 2, and the gas flow meter 72 is used to feed back the air supply of the current circuit.

[0032] According to a preferred embodiment of the present invention, when the aviation lubricating oil pump 3 rises with the aircraft, the atmospheric pressure will decrease with the increase of altitude, and the vacuum pump 18 can be used to evacuate the main oil tank 1 to form a negative pressure, thereby achieving the purpose of simulating the high-altitude state of the aviation lubricating oil pump 3.

[0033] More specifically, the regulating valve 20 is used to achieve precise regulation of the vacuum pressure of the main fuel tank 1; the compressed air source 16 is used to increase the air pressure in the main fuel tank 1, and the pressure regulating filter 17 is used to adjust the air pressure, thereby meeting the conditions for ground performance testing of the aviation lubricating oil pump 3.

[0034] According to another preferred embodiment of the present invention, the main oil tank 1 and each of the oil-gas mixing tanks 2 are preferably designed as a closed cylindrical structure according to a vacuum container, and the bottom of each of the oil-gas mixing tanks 2 is preferably designed as a cone.

[0035] The working principle of the multifunctional aviation lubricating oil pump test bench according to the present invention will be explained in detail below.

[0036] The aviation lubricating oil pump 3 as the test object is installed on the output shaft of the gear box 15. When the driving motor 12 is working, it acts as a power source to drive the input shaft of the gear box 15 to rotate. The gear box 15 increases the speed and drives the aviation lubricating oil pump 3 to work.

[0037] At the same time, the booster pump 52 starts to work. By adjusting the opening of the air mixing circuit throttle valve 82 and the oil mixing circuit throttle valve 83, the oil-gas mixing ratio in the oil-gas mixing tank 2 can be controlled. The four oil suction ports of the aviation lubricating oil pump 3 suck the mixed oil-gas mixed medium through the oil supply circuit. The two oil return ports of the aviation lubricating oil pump 3 are connected to the 2-way oil return pipeline to transport the oil-gas mixed medium back to the main tank 1. The temperature transmitter, flow meter, and pressure transmitter at each circuit feedback the current working status of the tested pump.

[0038] In summary, the test bench described in the present invention can successfully simulate the working conditions of multiple models of tested lubricating oil pumps, and can complete the requirements of multiple test items such as fatigue life test, oil-gas mixing test, high-altitude performance test, ground performance test, etc. in one installation, thereby reducing the workload of disassembly and assembly of the tested lubricating oil pumps and improving scientific research and production efficiency, and thus has broad application prospects.

[0039] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional aviation lubricating oil pump test bench, comprising a main oil tank (1) and an oil-gas mixing tank (2), wherein an aviation lubricating oil pump (3) as a test object is arranged between the main oil tank (1) and the oil-gas mixing tank (2), and characterized in that: The oil suction port of the aviation lubricating oil pump (3) is connected to the bottom of the four oil-gas mixing tanks (2) via four oil supply pipelines, and each oil supply pipeline is connected in series with a pipeline heater (62), a temperature transmitter, a flow meter, a regulating valve and a pressure transmitter, thereby providing the aviation lubricating oil pump (3) with a certain ratio of oil-gas mixed medium and providing feedback on the working status of each oil suction port; The oil return port of the aviation lubricating oil pump (3) is connected to the top of the main oil tank (1) via two oil return pipelines, thereby being used to transport the oil-gas mixture back to the main oil tank (1); In addition, a fatigue loading circuit is provided between the oil return port of the aviation lubricating oil pump (3) and the main oil tank (1), and an oil-gas mixing circuit is provided between the main oil tank (1) and each of the oil-gas mixing tanks (2); wherein the fatigue loading circuit has an oil suction filter (42), a booster pump (52) and a temperature transmitter connected in series in sequence; and, between the fatigue loading circuit and the main oil tank (1), a full-flow solenoid valve (22) and a relief valve (21) connected in parallel are provided, wherein by controlling the opening and closing rhythm of the full-flow solenoid valve (22) and the set pressure of the relief valve (21), the booster pump (52) provides an adjustable cyclic pulse pressure for the oil return port of the aviation lubricating oil pump (3); The oil-gas mixing circuit is composed of an air mixing circuit and an oil mixing circuit, wherein a throttle valve, a pressure transmitter, a flow meter and a nozzle (11) are connected in series in sequence between the booster pump (52) and each of the oil-gas mixing tanks (2), thereby forming an oil mixing circuit; a throttle valve and a gas flow meter (72) are connected in series in sequence between the air cavity of the main tank (1) and the air cavity of each of the oil-gas mixing tanks (2), thereby forming an air mixing circuit; In addition, between the top of the main oil tank (1) and the top of each of the oil-gas mixing tanks (2), a compressed air source (16), a pressure regulating filter (17), a vacuum pump (18) and a regulating valve are connected in series in sequence, wherein the vacuum pump (18) is used to evacuate the main oil tank (1) to form a negative pressure to simulate a high-altitude state, the regulating valve regulates the vacuum pressure of the main oil tank (1), the compressed air source (16) is used to increase the air pressure in the main oil tank (1), and the pressure regulating filter (17) is used to adjust the air pressure to meet the conditions for the ground performance test of the aviation lubricating oil pump (3).

2. A multifunctional aviation lubricating oil pump test bench as claimed in claim 1, characterized in that: The main oil tank (1) is designed as a closed cylindrical structure according to the vacuum container.

3. A multifunctional aviation lubricating oil pump test bench as claimed in claim 1 or 2, characterized in that: Each of the oil-gas mixing tanks (2) is designed as a closed cylindrical structure according to the vacuum container, and its bottom is designed to be conical.

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