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A Low-Temperature Helium Transport Sealing Structure for a Superconducting Rotary Machine

A technology of sealing structure and rotating machinery, applied in the sealing of engines, the usage of superconductor elements, mechanical equipment, etc., can solve problems such as leakage and poor sealing effect, and achieve the effect of easy structure

Active Publication Date: 2020-10-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetic fluid sealing technology is used between the stationary end and the rotating end to prevent the compressed helium from leaking during transmission, but the sealing effect is still not good, and there are still serious leakage problems

Method used

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  • A Low-Temperature Helium Transport Sealing Structure for a Superconducting Rotary Machine
  • A Low-Temperature Helium Transport Sealing Structure for a Superconducting Rotary Machine
  • A Low-Temperature Helium Transport Sealing Structure for a Superconducting Rotary Machine

Examples

Experimental program
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Embodiment

[0027] Such as figure 1 , 2 As shown, a superconducting rotary machine low-temperature helium transmission sealing structure, including a stationary inlet pipe 1, a rotating inlet pipe 2, a gas return pipe 3, a vacuum interlayer pipe 4, and a magnetic fluid sealing device 5 (rotating part 5.1, static part 5.2) , Honeycomb sealed structure 6. The low-temperature helium gas enters the rotating inlet pipe 2 from the cryogenic refrigerator through the static inlet pipe 1 and enters the superconducting rotating machine to cool the superconducting magnet. After the gas is heated, it returns to the refrigerator through the return pipe 3 and other circuits for cooling. Since the return air temperature is higher than the intake air temperature, in order to avoid energy loss, the inlet pipe and the return air pipe are insulated by a vacuum interlayer pipe 4, and the air intake and return air are isolated by a honeycomb sealing structure 6 at the static and rotating joints , to prevent...

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PUM

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Abstract

The invention relates to a low temperature helium transmission sealing structure of superconductive rotating machinery. The structure comprises stationary air inlet pipes, a rotary air inlet pipe andan air return pipe. The stationary air inlet pipes are inserted into the rotary air inlet pipe and arranged in a spaced manner; the outlet end of each stationary air inlet pipe is a cone, the diameterof which is diminishing, along a low temperature helium feeding direction; and a honeycomb sealing structure for preventing leakage of the low temperature helium is arranged between each stationary air inlet pipe and the rotary air inlet pipe. The sealing structure adopts a primary sealing-back-step structure to reduce the pressure of the low temperature helium introduced to a leaking gap and achieves a low leakage rate at the leaking gap by a secondary honeycomb structure. The two sealing structures are easy to manufacture and process, so that the progress of engineering of the superconductive rotating machinery is accelerated effectively.

Description

technical field [0001] The invention relates to the field of superconducting rotary machines, in particular to a low-temperature helium transmission sealing structure for superconducting rotary machines. Background technique [0002] In superconducting rotary machines, the low-temperature helium gas transfer device is a transition device between the stationary refrigerator and the rotor, used to transfer cold helium gas from the static refrigerator integrated device to the rotating rotor, and at the same time transfer the heat-absorbed helium The cold helium gas is transferred by the rotor to the refrigerator integrated device for cooling, and the cold helium gas circulates in the closed pipeline. [0003] The entire cryogenic system consists of an external static refrigerator integrated device, a cryogenic helium gas transmission device, a rotor vacuum inner pipeline and a helium gas storage device. According to the working needs of superconducting rotating machinery, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K55/00F16J15/43
CPCF16J15/3284F16J15/43Y02E40/60
Inventor 付小莉任智博李锦
Owner TONGJI UNIV
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