Ultrahigh rotating speed measuring device and method for ultralow-temperature liquid hydrogen pump
A speed measurement, ultra-low temperature technology, applied in the aerospace field, can solve the problem of insufficient safety margin of high-speed dynamic characteristics of shafting
Active Publication Date: 2021-09-10
BEIJING AEROSPACE PROPULSION INST
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Problems solved by technology
[0006] The technical problem solved by the present invention is: the present invention proposes an ultra-high-speed non-magnetic speed measuring device for ultra-low temperature liquid hydrogen pumps, in order to simplify the shafting, Solve the problem of insufficient safety margin of high-speed dynamic characteristics of shafting
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[0028] The present invention will be further elaborated below in conjunction with sub-figures and embodiments.
[0029] An ultra-high rotational speed measuring device for an ultra-low temperature liquid hydrogen pump, comprising a pump casing 1 , an inducer sleeve 4 , an inducer 3 , a rotational speed coil 5 and a sealing gasket 6 . The pump casing includes a threaded hole, a sealing circular groove and a ring of sealing thorns, the sealing gasket is placed in the sealing circular groove, and the speed coil and the pump casing are tightened and connected through the above threaded hole; the induction wheel sleeve includes a blind hole (see figure 2 As shown), the distance between the end surface of the above speed coil and the bottom surface of the blind hole is 0.5 ~ 1mm; after the inducer is installed, the radius gap between the tip of the inducer and the inducer sleeve is 1mm. The present invention cancels the built-in magnetic bar at the shaft end, and replaces the shaft...
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The invention relates to an ultrahigh rotating speed measuring device and method for an ultralow-temperature liquid hydrogen pump. The device comprises a pump shell, an inducer sleeve, an inducer, an eddy current type rotating speed coil and a sealing gasket; the inducer is directly fixed to the end of the shaft through a fastener and arranged in an inner cavity of the pump shell, and the inducer sleeve is fixedly installed in the inner cavity of the pump shell and does not change the inducer flow field; the inducer sleeve is provided with a blind hole opposite to the outer side of the inner cavity of the pump shell; the eddy current type rotating speed coil is placed in the blind hole, a gap is reserved between the eddy current type rotating speed coil and the bottom of the blind hole, the eddy current type rotating speed coil and the pump shell are fixed in a sealed mode, the position of the eddy current type rotating speed coil is opposite to the inducer blade tip, and the rotating speed value of the inducer is obtained through the electric turbine principle.
Description
technical field [0001] The invention relates to the field of aerospace technology, in particular to a non-magnetic rotational speed measuring device for a liquid hydrogen pump operating at an ultra-high rotational speed in extremely low-temperature liquid hydrogen. Background technique [0002] At present, my country is gradually implementing important space programs such as lunar exploration, Mars exploration, and even lunar landing. The traditional aerospace powers led by the United States have also launched various space exploration projects one after another. For any country, the most effective and powerful rocket propulsion at this stage still relies on the energy generated by the combustion of chemical fuels. As the fuel with the highest specific impulse, liquid hydrogen / liquid oxygen is irreplaceable. As a key component for transporting liquid hydrogen and liquid oxygen medium, the turbo pump is one of the core technologies that have the greatest impact on engine perf...
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IPC IPC(8): G01P3/49F02K9/96
CPCG01P3/49F02K9/96
Inventor 刘洪杰李铭王怡萱吴霖岳文龙胡晓睿杜家磊叶小明闻林元
Owner BEIJING AEROSPACE PROPULSION INST