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Jiggle corrosion abrasion-micro amplitude collision abrasion test machine

A fretting corrosion and wear test technology, which is applied in the field of testing machines, can solve the problems affecting the reliability of the blade, the gap becomes larger, and the "tightness" becomes smaller, so as to reduce the friction, improve the utilization rate, and reduce the force. Reduced effect

Active Publication Date: 2011-09-28
HARBIN GUANGHAN GAS TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is fretting wear or collision wear, under long-term working conditions, the "tightness" between the working surfaces will become smaller and the gap will become larger, thus affecting the working reliability of the blade

Method used

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  • Jiggle corrosion abrasion-micro amplitude collision abrasion test machine
  • Jiggle corrosion abrasion-micro amplitude collision abrasion test machine
  • Jiggle corrosion abrasion-micro amplitude collision abrasion test machine

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Embodiment Construction

[0051] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0052] combine figure 1 , relying on collision limiting and damping to control the dynamic stress of the turbine shrouded blade and other blade devices under the working state of the blade, its typical physical model is as follows figure 1 . Mi represents the mass of each impacting and impacted object, Ke and Ce represent the system stiffness and damping respectively, δ is the gap between the two objects, and F(t) is the external force acting on the impacting object. In this test device, the test pieces on the left and right sides of the test section and the elastic collision devices with controllable stiffness on both sides of the heating furnace are the concrete embodiment of this model.

[0053] Relying on the pre-twist of the blade and the elastic torsion under the working condition, the "tightness" between the damping surfaces of the shroud is generated in ...

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Abstract

The invention provides a jiggle corrosion abrasion-micro amplitude collision abrasion test machine. The test machine consists of a main machine and a system, wherein the system comprises a measurement control system and a cooling system; the main machine comprises a device base, a driving motor, an eccentric wheel mechanism, a lever-type swinging-arm mechanism and an electric heating furnace; thelever-type swinging-arm mechanism drives a shaft pin of a rolling bearing serving as a rotating center, and is arranged on the device base through front and rear brackets with balls; a frequency-variable motor enables the lever-type swinging-arm mechanism to produce reciprocating swing by using the shaft pin as the center and using a pin roller bracket as a plane through an eccentric wheel which is arranged at the shaft end and provided with the rolling bearing; each part is lubricated by lubricating grease; and a hole at the bottom of the electric heating furnace enables the lower part of a swinging-arm test section to be supported on the pin roller bracket. The test machine is used for representing the jiggle corrosion abrasion and micro amplitude collision abrasion work properties of crowned turbine blades, blades with various intermediate damping tables and blade vibration damping device and the like in the power mechanical devices in aviation, ship, industrial gas turbine and steam turbine and the like, and can be applied to the similar machinery.

Description

(1) Technical field [0001] The invention relates to a testing machine, in particular to a wear testing machine mainly used for fretting corrosion wear and micro impact wear test research of turbine blades and the like. (2) Background technology [0002] Turbine blades with crowns and blades with various intermediate damping tables (fan blades of turbofan engines, rear fan blades, ship Gas turbine reverse turbine blades, etc.) and various forms of blade vibration damping devices to change the vibration characteristics of the blades, improve their working reliability, or improve their aerodynamic performance. [0003] Since the profile of the blade twists and changes along the blade span, the blade will elastically twist under the action of centrifugal force, aerodynamic force and temperature field during operation. When the blade shroud and the damping table are in the state of contact and extrusion in the installation state or the working state, the damping surface is in a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/56G01M15/14
Inventor 闻雪友李琦
Owner HARBIN GUANGHAN GAS TURBINE
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