Rotor test bench and test method with spigot connection structure

Abstract

The invention belongs to the technical field of aeroengine rotor system tests, and relates to a rotor test bench of a spigot connecting structure, and a test method. The test bench is mainly composedof a test sensing system, a rotor-support system and an electrical control box; the test sensing system is mainly composed of vibration test software, a collection card chassis, a collection card, a data collection system, an LMS test device, a modal force hammer and sensor fixing frames; the rotor-support system is mainly composed of a base, a left bearing seat bracket, a left bearing seat, a rotating shaft, a left fixing disc, a left spigot disc, a right spigot disc, a right conical cover, a locking nut, a right bearing seat, a right bearing seat bracket, a variable frequency motor, a motorseat and a deep groove ball bearing; and the electrical control box is connected with the variable frequency motor for adjusting the rotating speed. The rotor test bench provided by the invention is used for studying the influence of the spigot connecting structure and related parameter changes on the inherent characteristics and dynamic characteristics of the rotor system, and providing a test basis for the design of the spigot connecting structures of aeroengines.

Description

technical field [0001] The invention relates to the field of aero-engine rotor system tests, and relates to a test bench and a test method for a rotor with a spigot connection structure. Background technique [0002] An aero-engine is a whole composed of several parts through a connection structure. The existence of a connection structure will reduce the local stiffness of the aero-engine rotor system, thereby changing the vibration characteristics of the rotor system. If the design of the connection structure is unreasonable, it is very likely to cause connection failure during the working process of the aero-engine, which will lead to more serious accidents. At the same time, during the high-speed rotation of the rotor, the connection stiffness will also change with the change of load and working conditions, which makes the dynamic behavior of the rotor system more complicated. Therefore, it has become an important research direction in the field of aero-engine design and...

AI Technical Summary

Problems solved by technology

Traditional connection methods such as bolted connections require additional joints, which will increase the overall mass of the engine, and these joints often introduce unbalanced masses, which is extremely critical for rotating machines such as aero engines that work at high speeds. Adverse

In addition, the long tie rods and short bolts in the bolt connection will generate a large centrifugal force when the engine is running at high speed, and holes need to be drilled at the connection position, thus affecting the structural strength of the rotor. These disadvantages limit the performance of the aero-engine to a certain extent promotion

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