Fluid-structure interaction dynamic property testing device for blade-rotor system

Abstract

The invention discloses a fluid-structure interaction dynamic property testing device for a blade-rotor system. The device includes a testing cylinder, a fluid storage and conveying system used for conveying fluid medium to the inner part is arranged on the outer part of the testing cylinder. A rotor structure is arranged in the testing cylinder. A drive device drives the rotor structure to rotate through a transmission device. A displacement sensor I measuring blade vibration displacement is mounted on the inner wall of the testing cylinder. An acceleration sensor I used for measuring the vibration acceleration of the transmission shaft and a displacement sensor II used for measuring vibration displacement of the transmission shaft are mounted on the transmission device. An acceleration sensor II used for measuring the vibration acceleration of the rotary shaft of the rotor is mounted in the testing cylinder. The displacement sensor I, the acceleration sensor I, the displacement sensor II and the acceleration sensor II are all connected with a data processing system. The data processing system analyzes the vibration properties of the blade-rotor system in a fluid-structure interaction state under different working conditions according to data of the different sensors.

Description

technical field [0001] The invention relates to a dynamic characteristic test device for fluid-solid coupling of a blade-rotor system, which belongs to the technical field of vibration of impeller rotating machinery. Background technique [0002] With the advancement of science and the development of technology, high-speed rotating machinery is a type of mechanical equipment that is widely used. While rotating machinery realizes its own value, it is also accompanied by many problems, such as surge, stall, damage, etc. The generation of these problems is mainly attributed to the interaction between the fluid and the blade-rotor system, that is, fluid-solid coupling. The movement of the fluid medium causes the vibration of the rotor system, which produces a certain displacement or acceleration and even changes the structure of the rotor itself; when the motion state of the rotor changes, it also changes the flow field of the fluid medium. [0003] In rotating mechanical equip...

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Problems solved by technology

However, due to the high temperature required by infrared heat radiation, this measurement method can only be used after the gas turbine has been running for a certain period of time, and the vibration characteristics cannot be monitored during the start-up process of the gas turbine.

[0009] The application of rotating machinery is becoming more and more extensive, and the power and speed have been greatly increased. Up to now, there is no complete test device that can obtain the fluid-solid coupling modal characteristics and vibration responses of blade-rotor systems of different specifications.

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