A support assembly and test method for similar simulation tests of high-speed rotors

Abstract

The invention provides a supporting component used for a similar simulation test of a high-speed rotor and a testing method, and belongs to the field of similar design of the high-speed rotor. The supporting component comprises a bearing, multiple rotor cages and a testing platform support. The bearing is used for supporting the simulation rotor to rotate, inner diameters of the rotor cages are identical and are matched with the outer diameter of the bearing, the rigidities of the rotor cages are different, in the test, different rotor cages are selected to sleeve the exterior of the bearing respectively, and the selected rotor cages and bearing are fixed through the testing platform support to simulate different supporting rigidities. The supporting rigidity of the provided supporting component can be two times or above that of a rotor original part, and the supporting component has high adjustment capacity for the supporting rigidity of a rotor system.

Description

technical field [0001] The invention belongs to the field of similar design of high-speed rotors, and relates to a support assembly for similar simulation tests of high-speed rotors and a similar simulation test method. Background technique [0002] The turbopump rotor system is the main component of the liquid rocket engine turbopump. With the continuous exploration of space and the rapid development of the aerospace industry, the working speed of the engine continues to increase, usually exceeding the first-order, second-order or even super-third-order critical speed. flexible rotor. However, the test capability of the corresponding high-speed flexible rotor does not fully meet the existing design requirements, mainly due to the instability of the existing high-speed test system, immature test methods, uncontrollable test safety, and insufficient high-speed test capability. This restricts the research and development of high-speed flexible rotors. [0003] Through the si...

AI Technical Summary

Problems solved by technology

However, although the similarity theory of high-speed flexible rotors has been relatively perfect, many theoretical conditions cannot be satisfied in actual experiments. It is not difficult to scale up or down, but the rotor system usually includes a high-speed rotor, bearings and a test bench support for supporting the bearing. The bearing is used to support the rotation of the high-speed rotor. The test bench support includes the support body and the The inner cavity of the seat body is equipped with a hydraulic device. At present, the support stiffness of the test bench support can only be changed through the hydraulic device. Since the adjustment amount of the hydraulic device to the stiffness is only about 30-50% of the rigidity of the support body, it cannot meet the larger requirements. Stiffness is proportionally transformed, and due to the limited control precision of the hydraulic device, the adjustment precision of the stiffness is low, and it is easy to fluctuate up and down

Images