Simply supported beam type dynamic vibration absorber with adjustable frequency

A dynamic vibration absorber and simply supported beam technology, applied in the field of vibration absorbers, can solve the problems of inconvenient practical application and inability to provide natural frequencies, and achieve the effect of less electromagnetic leakage and reduced demand

Active Publication Date: 2014-03-12
HARBIN ENG UNIV
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Problems solved by technology

[0004] The utility model patent with the application number 201020244612.2 describes a dynamic vibration absorber that changes the natural frequency by changing the mass. This vibration absorber has a simple structure, but it cannot provide a continuously changing natural frequency by adjusting the number of masses. In practical applications not convenient

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  • Simply supported beam type dynamic vibration absorber with adjustable frequency
  • Simply supported beam type dynamic vibration absorber with adjustable frequency
  • Simply supported beam type dynamic vibration absorber with adjustable frequency

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Embodiment Construction

[0017] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0018] combine Figure 1~3 , the base 4 is the basic base, which is used to install and fix various other components. The vibration-absorbing body is a metal beam 1 structure with simple support at both ends and adjustable working length. The material of the metal beam 1 structure is spring steel. In the length direction of the base 4, there is a dovetail groove in the center, which is used as a guide rail for installing the slider 2, and restricts the movement of the slider 2 in other directions so that it can only move along one degree of freedom. One side of the dovetail groove There are inverted T-shaped grooves in the same direction in processing, which are used to install the limiter 9. Base 4 is fixedly installed with a support plate 8 with bolt at the other end of placing motor, has hole on the support plate, cooperates with self-aligning bearing 7. Ea...

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PUM

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Abstract

The invention aims at providing a simply supported beam type dynamic vibration absorber with adjustable frequency. The dynamic vibration absorber comprises a base, a stepping motor, two sliding blocks, a transmission screw and a metallic beam, wherein the base is provided with dovetail grooves, the lower end parts of the sliding blocks are of dovetail-shaped structures, support arms with holes are arranged at the upper end parts of the sliding blocks, threaded through holes are formed in the middle parts of the sliding blocks, the lower end parts of the two sliding blocks are mounted in the dovetail grooves, a concentrated mass block is arranged at the middle part of the metallic beam, the two ends of the metallic beam respectively penetrate through the holes of the support arms at the upper end parts of the two sliding blocks, reverse threads are symmetrically formed in the external wall of the transmission screw, the transmission screw penetrates through the through holes in the middle parts of the two sliding blocks and is matched with threads of the two through holes, and a first end of the transmission screw is connected with the stepping motor. According to the dynamic vibration absorber, the defect that the traditional helical-spring vibration absorber is easily affected by mounting pre-tightening force is overcome; compared with the cantilever vibration absorber, the requirements on outward extending space are reduced; compared with the electromagnetic and electric tunable vibration absorbers, the electromagnetic leakage is less.

Description

technical field [0001] The invention relates to a vibration absorber. Background technique [0002] For a long time, how to control and reduce the vibration of structures has been a research hotspot. Vibration absorption technology is a relatively mature and effective method among many vibration control methods, which is embodied in the dynamic vibration absorber manufactured by using the vibration absorption principle. [0003] Dynamic vibration absorbers can generally be divided into three categories: passive, semi-active, and fully active. The structural parameters of the passive dynamic shock absorber, that is, the stiffness and mass are not adjustable. It has a good vibration-absorbing effect on single-frequency vibration, but it has the disadvantage of a single controllable frequency. The fully active dynamic vibration absorber adjusts the vibration state of the vibration absorber through the vibration state feedback of the main vibration system, so that the dynamic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/02
Inventor 李玩幽刘子豪王舒楠柴卓野胡云波马旋
Owner HARBIN ENG UNIV
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