Overhauling test method special for locomotive screw air compressor

Abstract

The invention relates to an overhauling test method special for a locomotive screw air compressor, comprising the following steps: disassembling, cleaning, overhauling, assembling components, carrying out an air-tight test, finally assembling, and carrying out a combined test. The key steps are as follows: clearance measurement control among an active rotor, a driven rotor and a shell; air-tight test, wherein nitrogen liquid is combined with efficient and clean air-tight test to solve the drawback that the step of drying is required after the traditional hydrostatic test, and test period is shortened; and performance test, wherein a performance test bed special for simulating locomotive working condition is utilized and solves the problems of requirements of air intake valve unloading time starting and halt test after practical volume flow measurement, exhaust pressure and temperature, overload test and air compressor measurement.

Description

technical field [0001] The invention relates to a special maintenance test for a locomotive screw air compressor, in particular to a special maintenance test method for a locomotive screw air compressor. Background technique [0002] The main function of the locomotive screw air compressor is to provide compressed air to the train to realize the braking of the train and provide an air source for the action of the vehicle's pneumatic control device. It is one of the most basic key components of railway vehicles. The quality of its maintenance plays a very important role in the running safety of the locomotive. [0003] In the past, when the screw air compressor was overhauled, there was a head gap that could only be determined by experience and could not be quantitatively measured. Compared with the screw air compressor, the general-purpose locomotive air compressor test bench did not have enough tests. The old maintenance method has many artificial factors, inaccurate, low...

AI Technical Summary

Problems solved by technology

[0003] In the past, when the screw air compressor was overhauled, there was a head gap that could only be determined by experience and could not be quantitatively measured. Compared with the screw air compressor, the general-purpose locomotive air compressor test bench did not have enough tests. The old maintenance method has many artificial factors, inaccurate, low efficiency, and easy to cause unstable quality.

Images