High-speed magnetic suspension rotor type axial detection device and centrifugal compressor

Abstract

The invention discloses a high-speed magnetic suspension rotor type axial detection device and a centrifugal compressor and belongs to the technical field of centrifugal compressors and accessories thereof. The high-speed magnetic suspension rotor type axial detection device and the centrifugal compressor are designed for solving the problems that an existing device is inconvenient to assemble and disassemble and the like. The high-speed magnetic suspension rotor type axial detection device comprises a magnetic suspension spindle, a steplike spindle shoulder is arranged on the magnetic suspension spindle, a radial bearing rotor component sleeves the spindle shoulder, and an axial detection ring and a sensor are arranged on the spindle shoulder sequentially and positioned on the outer side of the radial bearing rotor component. The high-speed magnetic suspension rotor type axial detection device and the centrifugal compressor have the advantages that the magnetic suspension spindle can be disassembled from a shell without disassembling the detection ring and the sensor firstly; after the axial detection ring is mounted on the magnetic suspension spindle, a cylindrical grinder can be used for finish grinding of the outer side face of the axial detection ring to guarantee perpendicularity of the detection surface of the axial detection ring and the axis of the magnetic suspension spindle, so that machining difficulty of the axial detection ring is lowered.

Description

technical field [0001] The invention relates to the technical field of centrifugal compressors and accessories thereof, in particular to a high-speed magnetic suspension rotor axial detection device and a centrifugal compressor including the high-speed magnetic suspension rotor axial detection device. Background technique [0002] The high-speed maglev rotor axial detection device is the middle structure in centrifugal compressors and high-speed blowers, such as figure 1 As shown, the high-speed magnetic levitation rotor axial detection device includes a magnetic levitation main shaft 1, on which a step-shaped main shaft shoulder 11 is arranged, and on the main shaft shoulder 11, a radial bearing rotor assembly 2, a sensor 3 and An axial detection ring 4, wherein the sensor 3 is provided with a radial detection probe 5 and an axial detection probe 6 . [0003] The defects of this structure include: 1. The axial detection ring 4 is stepped along its axial direction, so that ...

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Problems solved by technology

[0003] The defects of this structure include: 1. The axial detection ring 4 is stepped along its axial direction, so that the axial detection ring 4 is installed on the magnetic levitation main shaft 1, and the axial detection ring 4 is axially positioned, resulting in the magnetic levitation main shaft The natural frequency of 1 is reduced, the critical speed is reduced, the size of the front bearing rotor assembly is the same as that of the rear bearing rotor assembly, and when the same control strategy is adopted, the stepped structure of the axial detection ring 4 will cause the control accuracy of the radial bearing at the left end to be worse than that of the radial bearing at the right end. Bearing control accuracy; 2. The machining accuracy of the axial detection ring 4 is strictly required and difficult to process; 3. When the magnetic levitation rotor (that is, the entire rotor) needs to be removed, the axial detection ring must be removed first due to the position of the sensor 3. 4 Dismantling, and then the magnetic levitation rotor can be disassembled, which increases the workload of dismantling the magnetic levitation rotor, and it is inconvenient to disassemble and assemble

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