Suspension type damper used for high speed rotating machine

Abstract

The invention discloses a suspension type damper used for a high speed rotating machine. The upper part of an oil film ring fixed bracket is fixedly connected to a damper fixed plate, and the lower part of the oil film ring fixed bracket is connected with the lower part of a sealing limiting ring through an oil sealing plate; the lower part of a ball fixed bracket is connected with the upper partof an oil film axle neck through combined suspenders; a gap is arranged between the bottom surface of the oil film axle neck and the oil sealing plate; an oil film ring is located at the outer side of the lower part of the oil film axle neck, and a gap is arranged between the oil film ring and the oil film axle neck; lubricating oil is injected between the oil film ring fixed bracket and the sealing limiting ring; and upper balls are arranged in a reversed V-shaped hole of a first suspender in each combined suspender and a V-shaped hole of the ball fixed bracket, and lower balls are arranged in a V-shaped hole of the second suspender and a reversed V-shaped hole of the oil film axle neck. The suspension type damper in the structure can ensure that a flywheel rotor operates at a low-order critical rotating speed stably, eliminate low frequency precessional motion and realize the integration of lower natural frequency and bigger oil film viscous damping performance.

Description

technical field [0001] The invention belongs to the technical field of mechanical parts, and in particular relates to a suspension damper used in high-speed rotating machines. Background technique [0002] In recent years, flywheel energy storage has developed towards high speed, high power, and high power-to-weight ratio. In order to reduce the friction loss of high-speed rotating flywheel systems and improve energy conversion efficiency, low-loss bearing technology has been widely concerned. Permanent magnetic bearing is one of the commonly used bearings, which can realize non-contact and frictionless, and also play the role of axial unloading, reduce the friction power consumption of the lower bearing, and improve the efficiency of the flywheel energy storage system. However, due to the small radial stiffness of the axial permanent magnetic bearing, the first-order natural frequency of the flywheel energy storage system is low. The dampers commonly used at present cannot...

AI Technical Summary

Problems solved by technology

However, due to the small radial stiffness of the axial permanent magnetic bearing, the first-order natural frequency of the flywheel energy storage system is low

The dampers commonly used at present cannot ensure that the flywheel rotor can smoothly pass through the low-order critical speed, eliminate low-frequency precession, and achieve a combination of low natural frequency and large oil film viscous damping performance

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