An Elastic Support Dry Friction Damper

Abstract

An elastic support dry friction damper comprises a mouse cage head, a mouse cage base and connecting rods. The mouse cage head comprise a universal sliding bearing, a sliding assembly and a mouse cage head base body; the mouse cage head and the mouse cage base are connected through the connecting rods; the mouse cage base is fixed to a bearing seat; cylindrical hollows are formed in the mouse cage head and the mouse cage base; the middle section of the cylindrical hollow of the mouse cage head is an inner spherical face, and the universal sliding bearing is installed on the middle section of the cylindrical hollow of the mouse cage head, wherein the inner spherical face is matched with the outer surface of the universal sliding bearing; a shaft hole is formed in the universal sliding bearing and matched with a rotating shaft, and a sliding bearing liner is inlaid in the shaft hole; the rotating shaft and the sliding bearing liner are connected and placed in the hollow of the mouse cage base; the mouse cage head base body is provided with a rectangular groove; the sliding assembly is installed in the rectangular groove, fixed to the mouse cage head base body and connected with a friction part; and the friction part is attached to the outer surface of the universal sliding bearing. The defection part of vibration and defection of the axial vibration can be damped actively and simultaneously, the requirement for the mounting position is reduced, and the size is small.

Description

technical field [0001] The invention relates to the field of vibration control, in particular to an elastically supported dry friction damper. Background technique [0002] In engineering, due to factors such as material internal resistance, unbalanced mass, sliding bearing oil film force and shafting misalignment, the rotor will vibrate during the rotation process, which will reduce the accuracy and service life of the machine, and will also affect people's safety. living and living environment. If the design is improper, it will cause resonance, cause machine downtime accidents, and even lead to catastrophic consequences. With the rapid development of modern industrial technology, in order to reduce the weight of high-speed rotor system, the design scheme of flexible rotor is often adopted, and its critical speed is low. The working speed is often above the first and second critical speeds, so the rotor must pass through the critical speed during startup, acceleration, s...

AI Technical Summary

Problems solved by technology

However, the existing dry friction dampers can only suppress the vibration corresponding to the rigid rotor, and usually require the damper to be installed at the position with the largest vibration deflection

Since most of the rotating machines are flexible rotors in practice, the existing dry friction dampers cannot suppress the vibration of the flexible rotor deflection axis

In addition, the existing dry friction damper has a large volume due to the existence of double friction plates and its supporting mechanism

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