Airtightness test device and method for combustion chamber nozzle

Abstract

The invention provides an airtightness test device and method for a combustion chamber nozzle. The device comprises a gas storage bottle, the gas storage bottle is connected with a fuel manifold of a main combustion chamber through a pipe, a total-pressure valve, a total pressure gauge and a constant-pressure valve are successively connected in series on the pipe connected with the gas storage bottle and the fuel manifold, a pressure gauge valve and a seal pressure gauge are disposed on the pipe, which is connected with the constant-pressure valve and the fuel manifold, in a parallel connection manner, and a nitrogen gas is filled in the gas storage bottole. Through adoption of an overall seal test of the fuel manifold, a seal test of a nozzle is performed on the condition that the combustion chamber nozzle is not decomposed, labor intensity when airtightness check of the nozzle is performed is reduced, labor time is greatly shortened, damage of an oil gas on a human body is also reduced, auxiliary materials and labor cost are saved, and malposition, deformations and even fractures, which are resulted from the fact that fuel branched pipes are detached and mounted on the nozzle repeatedly, of the fuel branched pipes are prevented.

Description

Technical field: [0001] The invention relates to the technical field of engine repair, in particular to an airtight test device and method for a combustion chamber nozzle. Background technique: [0002] After the main combustion chamber of a certain engine is tested, it is necessary to check the sealing of the nozzle. Before the inspection, the nozzle needs to be disassembled from the fuel pipe, and then the sealing of a single nozzle is checked with kerosene. Each nozzle has multiple nozzles. It takes a long time to do the sealing test, and after the sealing inspection, the fuel pipe needs to be re-calibrated and connected to the inlet nozzle of the nozzle. This repeated disassembly and assembly is very likely to cause dislocation and deformation of the fuel pipe, and the nozzle of the fuel nozzle. Leakage, in severe cases, will cause the fuel pipe to break. Moreover, when carrying out the sealing test on the combustion chamber nozzle, most of them use oil as the medium to...

AI Technical Summary

Problems solved by technology

[0002] After the main combustion chamber of a certain engine is tested, it is necessary to check the sealing of the nozzle. Before the inspection, the nozzle needs to be disassembled from the fuel pipe, and then the sealing of a single nozzle is checked with kerosene. Each nozzle has multiple nozzles. It takes a long time to do the sealing test, and after the sealing inspection, the fuel pipe needs to be re-calibrated and connected to the inlet nozzle of the nozzle. This repeated disassembly and assembly is very likely to cause dislocation and deformation of the fuel pipe, and the nozzle of the fuel nozzle. Leakage, in severe cases, will cause the fuel pipe to break

Moreover, when carrying out the sealing test on the combustion chamber nozzle, most of them use oil as the medium to carry out the sealing test. Generally, the test is carried out on a single nozzle. The test time is long, and the oil and gas volatilize and pollute, which will cause a lot of economic waste and personal injury

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