Magnetic-gas combination bearing structure for turbo expander
A turboexpander, combined bearing technology, applied in mechanical equipment, engine components, machines/engines, etc., to avoid oil pollution, increase service life, and reduce the frequency of replacement
Active Publication Date: 2021-02-23
ZHANGJIAGANG FURUI HYDROGEN ENERGY EQUIP CO LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a magnetic combined bearing structure for a turbo expander that has a long service life, no oil pollution, and can make the turbo expander run stably and reliably
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Embodiment Construction
[0014] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.
[0015] like figure 1 As shown, a magnetic-pneumatic combined bearing structure for a turbo expander includes: a labyrinth seal sleeve 2 and a shaft seal 3 fitted on the main shaft 1, and a seal gas is passed through the labyrinth seal sleeve 2 for sealing the main shaft. 1 and the front end of the bearing chamber 4 are sealed, so as to prevent the working fluid gas and cold energy in the chamber where the impeller 5 is located from leaking into the bearing chamber 4, and the shaft seal 3 is used to seal the gap between the main shaft 1 and the rear end of the bearing chamber 4 The gap between them is sealed, and a first air bearing 6 and at least one magnetic bearing are set on the main shaft 1 in the bearing chamber 4. The labyrinth seal sleeve 2, the air bearing, and the magnetic bearing are all available parts , the first air bearing ...
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The invention discloses a magnetic-gas combination bearing structure for a turbo expander. The magnetic-gas combination bearing structure comprises a labyrinth type sealing sleeve and a shaft seal with which a main shaft is sleeved, wherein the labyrinth type sealing sleeve is used for sealing a gap between the main shaft and the front end of a bearing chamber; the shaft seal is used for sealing agap between the main shaft and the rear end of the bearing chamber; the main shaft in the bearing chamber is sleeved with a first gas bearing and at least one magnetic bearing; the first gas bearingis used for supporting the end portion, close to an impeller, of the main shaft; each magnetic bearing is positioned behind the first gas bearing; and sealing gas and lubricating gas can flow into thebearing chamber to cool the magnetic bearings. According to the magnetic-gas combination bearing structure, an active magnetic bearing, a passive magnetic bearing and the gas bearing are combined foruse, so that the risk that the oil bearing is frozen due to low temperature and oil pollution are avoided, the bearing abrasion replacement frequency is reduced, the service life of the bearing structure is prolonged, and the operation stability of the turbo expander is improved.
Description
technical field [0001] The invention relates to the field of turbo expanders, in particular to a magnetic-air combination bearing structure for a turbo expander. Background technique [0002] The turboexpander is one of the key equipments in the cryogenic gas liquefaction system. The main principle of the turbo expander is to use the working medium gas with a certain pressure to perform adiabatic expansion in the turbo expander to push the impeller on one end of the main shaft to rotate to do work externally and consume the internal energy of the gas itself, so that the gas itself is strongly cooled. To achieve the purpose of refrigeration, the energy of the working medium gas to do work is consumed by the brake on the other end of the main shaft. The turboexpander mainly has working characteristics such as high speed, low temperature, and large pressure difference. The bearing structure supporting the operation of the main shaft in the turboexpander bearing chamber directl...
Claims
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IPC IPC(8): F01D25/16F01D25/12F01D11/04
CPCF01D25/16F01D25/125F01D11/04
Inventor 赵亚丽陈甲楠何春辉苏红艳魏蔚邬海强王朝倪中华严岩
Owner ZHANGJIAGANG FURUI HYDROGEN ENERGY EQUIP CO LTD