Fuel nozzle and header pipe combined sealing test device and method

Abstract

The invention belongs to an aero-engine fuel oil sealing test, and particularly relates to a fuel oil nozzle and header pipe combined sealing test device and a sealing test method. The fuel nozzle and header pipe combined sealing test device comprises an oil inlet pipe joint (1), a valve (2), a pressure gauge (3), a one-to-two adapter (4) and a nozzle cover (8). According to the fuel nozzle and header pipe combined sealing test device, a nozzle is sealed through the nozzle cover, so that the oil supply pressure required by a sealing test is reduced, the requirements on oil supply and oil return capabilities of a tester are reduced, the risk of detonation of atomized fuel oil is thoroughly avoided, and the device is safe and reliable. After the specified fuel pressure is reached, the valve is closed to maintain the pressure, the equipment can be closed to reduce the energy consumption, and whether the fuel leaks or not can be intuitively judged through the reading of the pressure gauge. According to needs, the test device can be placed in water to be heated so as to simulate the working temperature of the nozzle and the header pipe. Meanwhile, fuel is not discharged during the test, the pollution is less, a plurality of fuel nozzles and a header pipe can be simultaneously subjected to a combined sealing test, and the test efficiency is high.

Description

technical field [0001] The invention belongs to an aero-engine fuel oil sealing test, and in particular relates to a joint sealing test device and a sealing test method of a fuel nozzle and a main pipe. Background technique [0002] With the continuous development of aero-engines, the requirements for engine performance are getting higher and higher. The fuel nozzles in the combustion chamber have also developed from a single oil circuit to a dual oil circuit. The number of fuel nozzles has increased, and the fuel supply pressure has also become higher and higher. Mostly in the form of a fuel main pipe. The fuel nozzle and the oil main pipe are assembled on the combustion chamber casing. During the test run, there are often oil leakage problems at the pipe joints, and the fault repetition rate is high. At present, only a single nozzle or oil main pipe can be individually sealed, and there is no guarantee that the pipe joint will not leak after assembly. Especially in the p...

AI Technical Summary

Problems solved by technology

At present, only a single nozzle or oil main pipe can be individually sealed, and it cannot be guaranteed that the pipe joint will not leak oil after assembly

Especially in the prior art, when testing a single fuel nozzle, the nozzle opening type sealing test is generally adopted, and the plug sealing is seldom used, and it is directly judged whether there is oil leakage or oil leakage at the pipe joint when the nozzle is discharged, so the pollution is large. and low reliability

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