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Permanent magnet bearing squeeze film dumper with elastic ring

A technology of squeezing oil film damping and permanent magnet bearings, applied in the directions of bearings, shafts and bearings, springs/shock absorbers, etc., can solve the problems of low frequency precession, poor anti-overturning ability, high machining accuracy, and reduce the hoop tension Stress, lower manufacturing cost, compact effect

Active Publication Date: 2013-07-31
JIANGSU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in order to ensure the safe and stable operation of the shaft system, in various high-speed vertical rotating machines such as centrifuges, turbines, and energy storage flywheels, a suspended squeeze oil film damper is often used on the upper end of the rotor to reduce the vibration of the system. , but this kind of damper has three disadvantages: 1) The radial stiffness it can provide is too small and the anti-overturning ability is poor, resulting in too large inclination angle of the flywheel shafting during operation, which is easy to cause the motor magnetic field to change drastically along the axial direction. Cause low-frequency precession phenomenon; 2) The damping provided is too small, and when the system appears low-frequency precession, the excess energy of the shafting cannot be dissipated; 3) The volume is large and the machining accuracy is high

Method used

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  • Permanent magnet bearing squeeze film dumper with elastic ring
  • Permanent magnet bearing squeeze film dumper with elastic ring
  • Permanent magnet bearing squeeze film dumper with elastic ring

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Embodiment Construction

[0030] In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0031] Such as Figure 1~6 As shown, a permanent magnet bearing squeeze oil film damper with an elastic ring includes a bearing outer ring 3, a bearing inner ring 5 fixedly set on the shafting 4, and a lubricating oil cavity 7 filled with lubricating oil 1, and the bearing outer ring The ring 3 is installed in the lubricating oil cavity 7, and also includes the elastic ring 2, the bearing inner ring 5 and the bearing outer ring 3 are both radially magnetized, and the opposite sides of the bearing inner ring 5 and the bearing outer ring 3 after magnetization For the same magnetic pole, there is an air gap between the bearing inner ring 5 and the bearing outer ring 3, the inner ring of the elastic ring 2 is in contact with the outer ring of the beari...

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Abstract

The invention discloses a permanent magnet bearing squeeze film dumper with an elastic ring, which comprises a bearing outer ring, a bearing inner ring fixedly sleeved on a shaft system, and a lubricating oil cavity filled with lubricating oil, as well as the elastic ring, wherein the bearing outer ring is mounted in the lubricating oil cavity; the bearing inner ring and the bearing outer ring are radially magnetized, resulting in that the opposite surfaces of the both are like in poles; a gap is reserved between the bearing inner ring and the bearing outer ring; and the inner ring of the elastic ring is propped against the outer ring of the bearing outer ring, while the outer ring of the elastic ring is propped against the lubricating oil cavity. The permanent magnet bearing squeeze film dumper can improve radial bearing rigidity, provides larger damping ability, and is compact in structure.

Description

technical field [0001] The invention relates to a permanent magnetic bearing extrusion oil film damper with an elastic ring, which belongs to the technical field of non-contact bearing dampers. Background technique [0002] At present, in order to ensure the safe and stable operation of the shaft system, in various high-speed vertical rotating machines such as centrifuges, turbines, and energy storage flywheels, a suspended squeeze oil film damper is often used on the upper end of the rotor to reduce the vibration of the system. , but this kind of damper has three disadvantages: 1) The radial stiffness it can provide is too small and the anti-overturning ability is poor, resulting in too large inclination angle of the flywheel shafting during operation, which is easy to cause the motor magnetic field to change drastically along the axial direction. Cause low-frequency precession phenomenon; 2) The damping provided is too small, when the system has low-frequency precession, t...

Claims

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Application Information

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IPC IPC(8): F16F15/12F16F15/121F16F15/16F16C32/04
Inventor 王洪昌陈修祥何庆
Owner JIANGSU UNIVERSITY OF TECHNOLOGY
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