High altitude test system and method for aircraft engine oil system

An aero-engine and lubricating oil system technology, applied in the field of aero-engines, can solve the problems of not fully representing the reliability and life of work, affecting the development progress and development cost of the engine, and unable to truly reflect the working performance of the lubricating oil pump group, so as to reduce the test Hours and costs, high accuracy, and simple operation

Active Publication Date: 2016-04-20
CHINA AVIATION POWER MACHINE INST
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The high-altitude performance test of the lubricating oil pump is carried out by vacuuming before the pump. The flow rate of the lubricating oil system is mainly obtained by carrying out the high-altitude performance test of the pumps at all levels of the lubricating oil pump group under the condition of pure oil and the same oil temperature. However, due to the oil return pump on the engine The actual working condition is oil-gas two-phase flow, and th

Method used

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  • High altitude test system and method for aircraft engine oil system

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Embodiment 1

[0029] Such as figure 1 As shown, this embodiment provides an aeroengine lubricating oil system high-altitude test system. The test system simulates a certain engine lubricating oil system. The engine includes three bearing cavities connected in parallel with each other, and two of the three bearing cavities A bearing cavity oil return pump is connected in series on the oil circuit. The oil in the two bearing cavity oil return pumps is collected and drawn back to the main oil return pump of the engine lubricating oil system through the bearing cavity without the series oil return pump, and the main oil return pump is connected to the oil tank. The bearing cavity is connected in parallel with the oil tank with a ventilation system.

[0030] The high altitude performance of the engine's oil system can be tested by simulating the engine's oil system through the following settings; figure 1 As shown, the test system is provided with a vacuum pump 2, an oil tank 1, a booster pump 3, a ...

Embodiment 2

[0034] This embodiment provides an aeroengine lubricating oil system altitude test method, using the aeroengine lubricating oil system altitude test system described in Example 1 to test the altitude performance of an engine described in Example 1; It includes the following steps:

[0035] S1. Simulate the lubricating oil system of the engine under test, and set the connection relationship and quantity of oil tank 1, booster pump 3, lubricating oil cavity and oil return pump;

[0036] S2. Turn on booster pump 3, oil tank and oil return pump;

[0037] S3. Adjust the equivalent nozzle A so that the lubricating oil cavity A is the same as the corresponding tested engine bearing cavity oil supply Q1; adjust the equivalent nozzle B so that the lubricating oil cavity B is the same as the corresponding tested engine bearing cavity oil supply Q2; Adjust the equivalent nozzle C so that the oil supply volume of the lubricating oil cavity C is the same as the corresponding bearing cavity of th...

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Abstract

The invention provides a high altitude test system and a method for an aircraft engine oil system. According to the lubricating oil system of an engine, a vacuum pump, an oil tank, a booster pump, lubricating oil cavities and scavenge oil pumps are sequentially connected via a pipeline. A pressure adjusting valve is arranged between a main scavenge oil pump and the oil tank. A pressure sensor, a temperature sensor and a mass flow meter are arranged between the booster pump and the lubricating oil cavities. An equivalent nozzle used for regulating the flow is arranged inside each lubricating oil cavity. Through adjusting the equivalent nozzle of each lubricating oil cavity, the oil supply of the lubricating oil cavity is adjusted to be equal to the oil supply of an engine bearing chamber. Meanwhile, the total oil supply is ensured to simulate the oil supply of the engine. By means of the pressure adjusting valve, the oil pressure at the outlet of the main scavenge oil pump is adjusted and the oil pressure at the outlet of the main scavenge oil pump of an engine scavenge oil system is simulated. According to the technical scheme of the invention, the working performances of the engine oil system in different heat load and high altitude conditions can be scientifically and really simulated. Therefore, the working reliability and the service life of a lubricating oil pump can be found out and examined in advance. The phenomenon that due to the fact that the high altitude performance of the engine cannot be accurately determined, the test run by engine altitude test facilities must be conducted for verification and accumulation can be avoided. Therefore, the development schedule of the engine is ensured, and the development cost is saved.

Description

technical field [0001] The invention relates to the technical field of aero-engines, and more particularly, to an aero-engine lubricating oil system high-altitude test system and method. Background technique [0002] The high-altitude performance of the aero-engine lubricating oil system refers to the highest flight altitude that the lubricating oil pump can supply and return to ensure the normal and reliable operation of the engine. The lubricating oil pumps of aeroengines are generally positive displacement, and the commonly used ones are gear pumps, rotary plate pumps and rotor pumps. The positive displacement pump is characterized by vacuuming in front of the pump and forcing the fluid out after the pump. When the inlet conditions are the same, the flow rate at the pump outlet remains basically unchanged, and the pressure behind the pump depends on the resistance behind the pump. The performance of the lubricating oil pump is not only related to the structure of the lub...

Claims

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Application Information

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IPC IPC(8): G01M15/00
CPCG01M15/00
Inventor 曹鹏郭晖郑鹏常艳祥
Owner CHINA AVIATION POWER MACHINE INST
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