The rubbing between the seal coating and the blade is characterised by high-speed, high-temperature and interrupted contact. General friction and wear testing machines cannot meet the test requirements. Therefore,a frequently used abradability evaluation testing method is to build a high-speed, high-temperature rubbing test rig that can simulate the working conditions of seal coatings. All the tests in this study were conducted with a high-speed rub-bing test rig built by AECC Shenyang Liming Aeroengine and the AVIC Beijing Precision Engineering Institute for Aircraft Industry. The test rig is shown in Fig.1.
Fig.1(a) The high-speed rubbing test rig and (b) details of the rubbing region
The working principle of the test rig is presented in Fig.2. The blade sample is inserted into a metal disc that is driven by a high-speed motorised spindle. Driven by the spindle, the blade sample rotates and simulates the rotor motion in an aero engine. With the help of a sliding table, the coating sample is stepped forward to the rotating blade sample at a predefined speed and incursion depth. As soon as the coating contacts the rotating blade, rubbing begins.The normal and tangential forces generated during rubbing are recorded by measuring equipment.
Fig.2 Schematic of the high-speed rubbing rig
本文由桑尧热喷涂网收集整理。本站文章未经允许不得转载；如欲转载请注明出处，北京桑尧科技开发有限公司网址：http://www.sunspraying.com/
|
