Integrated liquid rocket engine high-speed turbo pump rotor dynamic characteristics test device

Abstract

The invention discloses an integrated liquid propellant rocket engine high speed turbo-pump rotor dynamic characteristic testing device. The integrated liquid propellant rocket engine high speed turbo-pump rotor dynamic characteristic testing device comprises a device upper pad (1), a device lower pad (2), a lubricating oil return cavity (3), a bearing intermediate lubricating oil path (4), a lubricating oil inlet(5), a device external axial positioning surface (6), a device external radial positioning surface (7), a lubricating oil return hole (8), bearing two-side lubricating oil injecting pipes (9), a rotor supporting axial positioning surface (10), a rotor supporting radial positioning surface (11), sensor observation points (12), positioning pin holes (13), and bearing intermediate oil injecting pipe (14). Supporting points of two ends of a test piece are connected and supported by an integral tool. The dynamic characteristic testing device provided by the invention is mainly suitable for a turbo-pump rotor system having a small span and a high rotating speed, and at the same time, has a bearing lubricating function, a function of acquiring the arrangement of the observation points, and other functions, and therefore the accuracy and the stability of the dynamic characteristic test of the high speed turbo-pump rotor system are guaranteed.

Description

technical field [0001] The invention discloses an integrated liquid rocket engine high-speed turbo pump rotor dynamic characteristic test device, which relates to the field of liquid rocket engine high-speed turbo pump rotor dynamic characteristic research, and is an integrated device for liquid rocket engine high-speed turbo pump rotor dynamic characteristic test, mainly is a supercritical flexible turbo pump rotor. Background technique [0002] The turbopump rotor system is the main component of the liquid rocket engine turbopump. With the rapid development of the aerospace industry, the performance of the engine continues to improve, and the working speed of the turbopump rotor continues to increase. It is usually a flexible rotor exceeding the first-order or even second-order critical speed. . The flexible rotor has obvious dynamic characteristics under high-speed operation, and is very sensitive to the vibration caused by unbalance and other factors. The study of the v...

AI Technical Summary

Problems solved by technology

[0003] Existing turbine pump rotor test devices are all split test devices, that is, a support device is designed at the two fulcrums of the rotor respectively. This design cannot guarantee the high concentricity of the rotor and the degree of alignment with the driving motor. , which not only interferes with the accuracy of test data collection, but even causes the motor drive shaft to break

At the same time, due to the split structure, the rigidity of the test device is weak, it is difficult to rise to a high speed stably, and it is easy to resonate with the test rotor, which is extremely dangerous

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