A flexible rotor of ultra-high speed liquid hydrogen turbo pump
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A flexible rotor and turbopump technology, applied to pumps, pump components, non-variable pumps, etc., can solve the problem that the lift, flow rate and efficiency of hydrogen turbopumps cannot meet the thrust and specific impulse requirements of the new generation of engines, and cannot Large-scale variable working conditions and other issues, to achieve the effect of light weight, shortened shafting length, and strong anti-disturbance ability
Active Publication Date: 2021-07-09
BEIJING AEROSPACE PROPULSION INST
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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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Embodiment 1
[0030] Such as Figure 1 to Figure 5 As shown, a flexible rotor device of an ultra-high-speed liquid hydrogen turbo pump is structurally composed of a screw 1, an inducer 2, a compression nut 3, a shaft 4, a first-stage centrifugal wheel 5, a metal rubber damper 6, and a squirrel-cage elastic Support 7, bearing pair 8, interstage bushing 9, secondary centrifugal wheel 10, balance piston 11, metal rubber damper baffle 12, first bushing 13, turbine disc 14, large nut 15, preload disc spring 16 , the second shaft sleeve 17, as attached figure 1 shown. Wherein the screw rod 1, the inducer 2, the compression nut 3, the first-stage centrifugal wheel 5, the second-stage centrifugal wheel 10, and the turbine disc 14 are all made of titanium alloy.
[0031] One end of the shaft 4 is provided with a screw mounting hole, and a screw tightening thread 41 is arranged in the screw mounting hole, and an inducer spline 42, a compression nut tightening thread 43, and a first-stage centrifuga...
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Abstract
The invention relates to a flexible rotor of an ultra-high-speed liquid hydrogen turbo pump, comprising a screw (1), an inducer (2), a compression nut (3), a shaft (4), a first-stage centrifugal wheel (5), and a metal rubber damper device (6), squirrel cage elastic support (7), bearing pair (8), interstage shaft sleeve (9), secondary centrifugal wheel (10), balance piston (11), metal rubber damper baffle (12 ), the first shaft sleeve (13), the turbine disk (14), the large nut (15), the preloaded disc spring (16), the second shaft sleeve (17); the shafting of the flexible rotor of the present invention is bidirectionally extended, Optimize the connection and torsion transmission structure, reduce the mass of the rotor, shorten the cantilever and support span on both sides, work supercritically, the rated speed reaches 80000rpm, the critical speed margin is more than 20%, and has 60%‑100% variable working conditions and axial Force-adaptive balance ability.
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 ...
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