Device capable of measuring high-speed rotating dynamic seal wear characteristic

Abstract

The invention discloses a device capable of measuring a high-speed rotating dynamic seal wear characteristic. The device comprises a rotation simulation device, an intrusion simulation device, a stress measurement device, a temperature measurement device and a computer. A high-speed servo motor is used for driving a turntable, the rotating speed range of the turntable is 300-16000r/min, and various high-rotating-speed working conditions of dynamic seal in an aero-engine can be simulated; and a high-precision stepping motor and a screw rod are used, different intrusion speeds and intrusion amounts can be simulated, and a rotor surface and a wear test piece can be economically and conveniently replaced. Therefore, the device can be widely applied to wear characteristic experiments of different dynamic sealing structures. The device is mainly composed of the rotation simulation device, the intrusion simulation device, the stress measurement device and the temperature measurement device; athermal infrared imager and a resistance strain gauge can be used to measure the temperature, the contact pressure and the contact friction force in the colliding and wearing process of sealing teethand a rotor at the same time, the colliding and wearing process can be analyzed more concretely, and the wearing deformation mechanism is studied more deeply.

Description

technical field [0001] The invention belongs to the technical field of aerospace turbine engines. Specifically, it relates to a device capable of simulating different rubbing conditions of high-speed rotating dynamic seals during the operation of an aero-engine and measuring the wear characteristics of high-speed rotating dynamic seals. Background technique [0002] In an aero-engine, a rotary dynamic sealing device is installed in the gap between the stator part and the rotor part to control the leakage flow from the high-pressure side to the low-pressure side in the gap between the two. The performance of the dynamic sealing device plays a very important role in the safe, economical and stable operation of the aero-engine. Commonly used dynamic sealing devices can be divided into labyrinth seals, honeycomb seals, hole seals, finger seals and brush seals according to the structure, and can be divided into shaft end seals, interstage seals, partition seals, etc. Plate seal...

AI Technical Summary

Problems solved by technology

[0004] In the existing dynamic seal wear test bench, the rotational speed of the wear disc is often low, which cannot reach the high rotational speed of the actual aeroengine rotor, so there is a certain difference between the simulated dynamic seal rubbing condition and the actual working condition

In addition, the current wear test bench often only replaces the wear test piece, and the replacement of the rotor surface requires a large test cost and a long time

Therefore, it is impossible to economically and effectively measure the influence of rotors with different structures and materials on the wear characteristics of dynamic sealing devices, nor can it be used to study the wear characteristics of rotors with sealing teeth on stator damping surfaces (such as honeycomb surfaces, hole-shaped surfaces, etc.)

In addition, the current wear test bench can only measure the deformation structure and metallographic structure of the test piece after wear, or indirectly measure the friction force of the contact part through torque, but cannot systematically and simultaneously measure the temperature of the friction contact part during the wear process, Real-time measurement of pressure and friction is not conducive to in-depth analysis and research on the wear and deformation mechanism of the dynamic sealing device during the rubbing process

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