High-speed intermittently-loaded circular block contact erosion tester

Abstract

The invention discloses a high-speed intermittently-loaded circular block contact erosion tester, which is characterized in that a mechanical main shaft driven by a motor is horizontally arranged on a worktable, a test ring is fixedly installed at the shaft end of the mechanical main shaft, and a test piece block is located right above the test piece ring and installed on a horizontally-arranged loading rod through a clamper. One end of the loading rod is hinged on a loading support while the other end of the loading rod is provided with a spring loading unit. The spring loading unit is provided with a loading support rod with a loading bolt, and the loading support rod is vertically arranged at the end part of the loading rod. The loading bolt leans against the loading rod. The bottom of the loading support rod is hinged with a vertical loading guide rod. A load testing sensor is connected with the lower end of the vertical loading guide rod. A spring base is arranged above the load testing sensor. The lower of the loading spring leans against the spring base while the upper end of the loading spring leans against the vertical loading guide support. The vertical loading guide support is installed on the worktable. The tester is used for simulating a contact erosion phenomenon of a high-speed shaft.

Description

technical field [0001] The invention relates to a high-speed, intermittently loaded ring block contact ablation testing machine, which is suitable for simulating the contact ablation phenomenon of a high-speed shaft and studying the formation and evolution law of a denatured layer on the surface of the high-speed shaft. Background technique [0002] Large centrifugal compressor speed range: 3000-48000 rpm. At high speed, in the bearing area, due to insufficient oil supply or too small contact area of ​​the tilting pad, the local temperature rises rapidly and the surface of the shaft becomes discolored; the vibration of the rotor exceeds the standard during operation, causing the shaft and the seal to scratch; The force calculation is not accurate, so that the stator, such as the diaphragm, is deformed. Since the gap between the rotor and the stator is 2-3mm, and the thickness of the diaphragm is about 100mm, when the pressure difference between the high and low pressure part...

AI Technical Summary

Problems solved by technology

In the existing technology, the test piece ring and the test piece block generally adopt continuous contact friction, and the speed is not high, all below 3000r / min, basically only material wear occurs on the friction surface, and phase change is difficult to occur

But now the speed of many shafts is as high as 10000r / min, or even higher, due to poor lubrication and other reasons, scratches with the stator part, resulting in instantaneous high temperature, causing phase change of the surface layer, which has a great impact on wear resistance; so far So far, there is no relevant report on the high-speed, intermittently loaded ring block contact ablation tester

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