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An Active Elastic Ring Dry Friction Damper for a Rotating Machinery Rotor Support Structure

A technology of dry friction damper and rotor support, which is applied in the direction of rotation vibration suppression, mechanical equipment, spring/shock absorber, etc., can solve the problem of unable to optimally control the overheating of the friction surface of the elastic ring for a long time, and achieve the improvement of nonlinearity and The effect of rotation state, good stiffness performance matching, and strong adaptability

Active Publication Date: 2020-11-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art that the elastic ring dry friction damper as a passively controlled damping mechanism cannot perform optimal control according to the vibration state of the rotor and the friction surface of the elastic ring is overheated for a long time, the present invention proposes a rotating machinery rotor support Structural Active Elastic Ring Dry Friction Damper

Method used

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  • An Active Elastic Ring Dry Friction Damper for a Rotating Machinery Rotor Support Structure
  • An Active Elastic Ring Dry Friction Damper for a Rotating Machinery Rotor Support Structure
  • An Active Elastic Ring Dry Friction Damper for a Rotating Machinery Rotor Support Structure

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Experimental program
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Effect test

Embodiment 1

[0030] As shown in Figure 1(a), the active elastic ring dry friction damper of the rotor support structure of the rotating machine is driven by an electromagnet coil 15 and a C-shaped magnet 14, and a circumferentially wound electromagnet coil 15 is placed on the C-shaped magnet 14, An electromagnet assembly is formed, and the electromagnet assembly is located between the static friction plate support and the outer ring 5 of the elastic ring. The right static friction plate support 11A and the left static friction plate support 11B are made of magnetic materials with good magnetic permeability; the materials of other parts can be magnetic conductive materials or non-magnetic conductive materials. The right dynamic friction plate is fixed on the outside of the outer ring 5 of the elastic ring, and the static friction plate is installed on the outside of the dynamic friction plate. The dynamic friction plate and the static friction plate are both a ring. Slightly larger than the...

Embodiment 2

[0039] As shown in Fig. 2(a), the active elastic ring dry friction damper of the rotating machinery rotor support structure is driven by left and right axial disc-shaped split springs with piezoelectric actuators.

[0040] The right axial disc-shaped split spring 7A is installed between the right static friction plate support 11A and the right damper housing 6A, and is fixedly connected with the right damper housing 6A, and is slidably connected with the right static friction plate support 11A. The shape-split spring 7B is installed between the left static friction plate support 11B and the left damper housing 6B, and is fixedly connected with the left damper housing 6B, and is slidably connected with the left static friction plate support 11B. The right dynamic friction plate 10A, the left dynamic friction plate 10B, the right static friction plate 9A and the left static friction plate 9B are all annular, and the outer diameter of the dynamic friction plate is slightly smaller...

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Abstract

The invention discloses an active elastic ring dry friction damper of a rotating machinery rotor support structure. The damper comprises an elastic ring inner ring, an elastic ring outer ring, a static friction plate, a movable friction plate, a static friction bracket and a force sensor. The movable friction plate is mounted on the elastic ring inner ring to form a movable friction module; and the static friction plate and the force sensor are fixed on the static friction plate bracket to form a static friction module. A friction pair is formed between the movable friction module and the static friction module. The active elastic ring dry friction damper changes positive pressure on the friction pair through cooperation of an electromagnet coil and a C type magnet or driving by left and right axial disc split springs with piezoelectric actuators, so that the friction force is controlled to realize active control of the vibration and the stability of a rotating machinery rotor system,and broad application prospect in active control of the vibration of the rotating machinery rotor system is achieved.

Description

technical field [0001] The invention relates to the field of rotating machinery, in particular to an active elastic ring dry friction damper of a rotating machinery rotor supporting structure. Background technique [0002] Any rotating machinery has inherent vibration, and when the external excitation frequency is the same as the natural frequency, the rotating rotor will generate self-excited vibration, which will lead to very serious consequences in severe cases, especially for high-speed rotor systems with continuously rising speeds (such as aero-engine , gas turbines, turbo expanders, turbochargers, high-speed blowers, etc.), their operating speeds often cross the first-order, second-order, or even third-order critical speeds. When the rotation speed is close to the critical speed or passes through the critical speed, the rotor will vibrate greatly, especially in the rotor system supported by pure rolling bearings (with stiffness and without damping). In order to solve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/18F16F15/129F16F15/10
CPCF16F15/10F16F15/129F16F15/18
Inventor 祝长生巩磊
Owner ZHEJIANG UNIV