Eddy-current-brake turbo expander

Abstract

The invention relates to an eddy-current-brake turbo expander. The turbo expander comprises a diffuser, a nozzle, an air inlet shell, an upper bearing seat, a lower bearing seat, an upper gas bearing, a bearing gland, a protective partition plate, a coil, a lower gas bearing, an eddy current brake body, a main shaft, a nozzle base, an outlet sealing piece, a gap adjusting gasket, an expansion impeller and a fastening screw; upper and lower cooling water partition plates are respectively welded to upper and lower heat conductors to form an integral structure A, and an inner channel is subjected to anti-corrosion treatment; inner and outer magnetic conductive rings and upper and lower heat conducting rings are welded into an integral structure B, and then the integral A and the integral B are welded together to form the eddy current brake body; the upper and lower bearing seats are correspondingly arranged at two ends of the eddy current brake body, the upper and lower gas bearings are respectively embedded in the upper and lower bearing seats, the main shaft is arranged in the center, and the upper and lower gas bearings at two ends are respectively limited by the nozzle base and the bearing gland; the nozzle is embedded in the nozzle base, and the expansion impeller is connected with the main shaft; the coil sleeves the outside of the outer magnetic conductive ring; and the diffuser is assembled and connected with the nozzle base.

Description

technical field [0001] The invention relates to the field of cryogenic and large-scale cryogenic systems, in particular to the field of large-scale helium cryogenic systems, in particular to an electric eddy current brake turbo expander. Background technique [0002] In the field of cryogenics, turbomachinery, chemical industry, superconductivity, aerospace, large-scale hydrogen & helium cryogenic systems and other fields that require large-scale cryogenics, these fields have a common feature: low demand temperature range, refrigeration Large quantities, especially large helium cryogenic systems, large hydrogen cryogenic systems, etc. In general, these large cryogenic systems require the use of turboexpanders. Common braking methods for turboexpanders include: fan braking, oil braking, etc. The traditional braking method has a certain "delay". This will have a certain impact on the timely adjustment and stability of the turbo expander, especially the last stage helium tur...

AI Technical Summary

Problems solved by technology

The traditional braking method has a certain "delay"

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