Flexible rotor of ultrahigh-rotating-speed liquid hydrogen turbine pump

Abstract

The invention relates to a flexible rotor of an ultrahigh-rotating-speed liquid hydrogen turbine pump. The flexible rotor comprises a screw (1), an inducer (2), a compression nut (3), a shaft (4), a primary centrifugal wheel (5), a metal rubber damper (6), a squirrel-cage elastic support (7), a bearing pair (8), an interstage shaft sleeve (9), a secondary centrifugal wheel (10), a balance piston (11), a metal rubber damper baffle (12), a first shaft sleeve (13), a turbine disc (14), a large nut (15), a preloaded disc spring (16) and a second shaft sleeve (17). The shaft system of the flexiblerotor extends outwards in two directions, connection and torque transmission structures are optimized, the mass of the rotor is reduced, cantilevers on the two sides and the supporting span are shortened, supercritical work is achieved, the rated rotating speed reaches 80000 rpm, the critical rotating speed margin is 20% or above, and meanwhile the flexible rotor has 60%-100% variable working condition and axial force self-adaptive balance capacity.

Description

technical field [0001] The invention relates to a flexible rotor of a turbo pump. Background technique [0002] The turbo pump is the heart of the engine. The increase in engine thrust, chamber pressure, and specific impulse means that the head, efficiency, and weight power density of the turbo pump have been greatly improved. Due to the low density of liquid hydrogen and the large volume flow rate, a higher speed is required to achieve the same lift. Therefore, the flexible rotor design of the hydrogen turbopump with ultra-high speed and deep variable working conditions has become one of the key technologies for the new generation of heavy-duty launch vehicle expansion cycle engines. [0003] At present, the hydrogen turbopump speeds of VINCI (Europe), RL60 (Japan) and RD-0146 (Russia) foreign advanced horizontal expansion cycle engines all reach 75,000rpm and above. However, the maximum speed of the domestic expansion cycle engine hydrogen turbopump is 60000rpm, and due ...

AI Technical Summary

Problems solved by technology

However, the maximum speed of the domestic expansion cycle engine hydrogen turbopump is 60000rpm, and due to the critical speed margin, axial force adaptability and other reasons, it cannot work in a wide range of variable working conditions, resulting in the head, flow and efficiency of the hydrogen turbopump. Meet the needs of the new generation of engine thrust and specific impulse improvement

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