Testing machine and method for evaluating wear life of graphite sealing material

Abstract

The invention relates to the field of aero-engines, in particular to a testing machine and method for evaluating the wear life of a graphite sealing material. A high-speed ring block abrasion testing machine and a PV acceleration testing method are adopted, and the problems that in the prior art, the sliding linear speed of a friction pair is insufficient, loading and lubricating modes are inconsistent with actual working conditions, and the graphite sealing material wear life evaluation period is long are solved. The testing machine comprises a rotating main shaft, a rotating disc, a precise loading feeding table, an oil way lubricating system, a data acquisition system, a computer and the like, a PV value acceleration method is adopted, the PV value of a friction pair is increased by increasing the load and the linear speed in the testing process, and accelerated abrasion testing on the wear life of the graphite sealing material to be tested is achieved. The testing machine can realize high linear speed, radial fixed loading and oil lubrication states required by the graphite sealing pair. The test adopts the PV accelerated test method, is particularly suitable for accelerated examination of long service life of sealing materials such as graphite, can effectively shorten the time required by the service life test, and has economic benefits.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a testing machine and method for evaluating the wear life of graphite sealing materials, which is suitable for studying the friction and wear performance of graphite sealing materials under high-speed and oil-lubricated working conditions, and is especially suitable for simulating the gearbox of an aero-engine And the service conditions of the graphite sealing device in the accessories, and accelerated assessment and evaluation of the wear life of the graphite sealing material. Background technique [0002] The continuous improvement of the performance of aero-engines not only leads to the gradual deterioration of the service conditions of the sealing device, but also poses more severe challenges to the leakage characteristics, friction and wear performance and long life requirements. At present, graphite seals are widely used in aero-engine gearboxes and accessories. The relative spe...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a testing machine and method for evaluating the wear life of graphite sealing materials, so as to solve the problems in the prior art that the linear velocity of the friction pair is insufficient, the lubrication state and the loading mode are inconsistent with the actual working conditions and cannot simulate the aeroengine gear The working condition of the sealing device of the box and casing accessories, and the lack of accelerated test methods for evaluating the wear life of graphite sealing materials, etc.

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