High-speed direct-drive double-cantilever multi-stage cylindrical centrifugal compressor

By using a high-speed direct-drive double-cantilever multi-stage cylindrical centrifugal compressor, combined with a permanent magnet synchronous motor and transient protection device, the energy loss and rotor rubbing problems of traditional compressors are solved, achieving efficient, compact and reliable operation characteristics.

CN121854432APending Publication Date: 2026-04-14BEIJING FRONTIER POWER TECH CO LTD
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Patent Information

Application Number
CN202610185186.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-09
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Traditional compressors suffer from problems such as large energy loss, large size, heavy maintenance workload, and difficulty in adapting to variable operating conditions. Furthermore, the long cantilever rotor is at risk of rubbing against stationary parts during transient processes.

Method used

It adopts a high-speed direct-drive double-cantilever multi-stage cylindrical centrifugal compressor, which is directly driven by a permanent magnet synchronous motor. The double-cantilever structure has multiple impellers connected in series, and a transient protection device, including an auxiliary bearing and bearing housing, is set at the end of the tie rod bolt to ensure non-contact operation in steady state and to provide mechanical limit to prevent collision and abrasion in transient state.

Benefits of technology

It achieves an efficient and compact structural design, reduces energy loss, reduces maintenance workload, and ensures rotor safety and reliability during transient processes.

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Abstract

The invention provides a high-speed direct-driven double-cantilever multi-stage cylindrical centrifugal compressor, and relates to the technical field of centrifugal compressors, the compressor is directly driven by a high-speed motor, and multi-stage impellers are serially connected on two sides of a driving spindle in a double-cantilever manner to form a first compression section and a second compression section which are serially connected to work; unification of a high pressure ratio and an extremely compact structure is realized, a transient protection device integrated at the tail end of a stay bolt is provided aiming at specific transient safety risks of the long cantilever rotor, a bearing mounting part of the stay bolt is in clearance fit with an auxiliary bearing, and the stay bolt is kept in non-contact with a rotating part when the compressor operates stably, so that the safety of the compressor is ensured. Unnecessary friction and loss are avoided, the auxiliary bearing can be in contact with the stay bolt before any static runner component only when transient overlarge deflection of the rotor occurs, so that effective mechanical limiting is provided, and collision and abrasion of dynamic and static parts are prevented.
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