Engine high-altitude simulation test auxiliary starting device and method

Abstract

The invention relates to an engine starting technology, particularly to an engine high-altitude simulation test auxiliary starting device and method, and aims to solve the problem that the pressure change of the inner and outer surfaces of a spray pipe is large before and after an existing engine is started. According to the technical scheme, the engine high-altitude simulation test auxiliary starting device comprises a diffuser and a blocking cover, wherein the blocking cover is installed at the outlet of the diffuser through a lifting lug plate and a connecting piece, and is provided with anextending part exceeding the outlet breadth of the diffuser, push rods are arranged on the rear end face of the extending part, at least two boosting mechanisms are distributed on the diffuser in thecircumferential direction, each boosting mechanism comprises an air cylinder, the telescopic direction of the piston rod of each air cylinder is parallel to the central axis of the diffuser, the number of the push rods is the same as that of the piston rods, the push rods and the piston rods are in one-to-one correspondence and are coaxially arranged, and the rear ends of the push rods are located within the stroke range of the front ends of the piston rods. The invention further provides an engine high-altitude simulation test auxiliary starting method.

Description

technical field [0001] The invention relates to engine starting technology, in particular to an auxiliary starting device and method for an engine high-altitude simulation test. Background technique [0002] After a certain high-model test run, the analysis of the data found that if the outlet of the diffuser is used to add a blocking cover, and after vacuuming, the engine starts its own impact to remove the blocking cover, and the high peak pressure near the engine nozzle may cause damage to the engine nozzle. adverse effects. [0003] A certain type of engine is subjected to a high-altitude simulation test, such as figure 1 As shown, the structure of the test device is vacuum chamber 01, nozzle 02, and diffuser 03. The plugging cover is installed at the outlet of the diffuser first, and then the plugging bolts are removed after the diffuser is evacuated. The engine starts its own impact and removes the blocking cover for the test. [0004] When conducting a test, if f...

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Problems solved by technology

[0005] The present invention aims to solve the problem that the existing engine has a large instantaneous pressure difference at the nozzle before and after starting, which is easy to break, and directly affects the accuracy of the engine test and engine performance evaluation, and provides an engine high-altitude simulation test auxiliary starting device and method

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