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Three-way frequency-adjustable dynamic vibration absorber

A technology of dynamic shock absorber and shock absorber, which is applied in the direction of shock absorber, shock absorber, spring/shock absorber, etc., can solve the problems that cannot meet the three-way vibration absorption, and achieve compact structure, suppression of line spectrum peak, and installation space The effect of little demand

Active Publication Date: 2014-01-29
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic vibration absorbers only have the function of one or two directions of vibration absorption, which cannot meet the needs of three-way vibration absorption

Method used

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  • Three-way frequency-adjustable dynamic vibration absorber
  • Three-way frequency-adjustable dynamic vibration absorber
  • Three-way frequency-adjustable dynamic vibration absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1, such as figure 1 As shown, the three-way adjustable frequency dynamic vibration absorber of the present invention mainly includes a guide rod, a middle nut 4, an upper nut 11, a lower spring 6, an upper spring 10, a lower fixed mass 7, an upper fixed mass 9 and more than two FM mass block8.

[0021] The connection relationship between the above parts is as follows: the lower fixed mass 7, the frequency modulation mass 8 and the upper fixed mass 9 are sequentially set on the guide rod 1, the middle nut 4 cooperates with the lower spring 6 and the upper nut 11 cooperates with the upper spring 10 to fix the lower end Mass block 7, multiple frequency modulation mass blocks 8 and upper fixed mass block 9 are fixed on guide rod 1 by pre-tightening force.

[0022] The frequency modulation principle of the three-way adjustable frequency dynamic vibration absorber of the present invention is as follows:

[0023] The principle of axial frequency modulation: according...

Embodiment 2

[0045] Embodiment 2, on the basis of embodiment 1, the surface of the non-threaded part on the guide rod 1 is plated with chrome to improve the surface hardness and smoothness, thereby reducing the friction between the mass block and the guide rod 1 and reducing the wear of the guide rod 1; All parts of the invention are made of corrosion-resistant stainless steel, which can withstand high and low temperature, oil pollution, radiation, and corrosion, thereby improving environmental adaptability.

Embodiment 3

[0046] Embodiment 3, on the basis of Embodiment 1 or 2, the nut locking method can be changed to a slotted nut with cotter pin, so that the height of the original nut can be reduced while realizing the anti-loosening function, so that the guide rod 1 is shortened, The installation space requirement of the invention is reduced.

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Abstract

The invention provides a three-way frequency-adjustable dynamic vibration absorber. The three-way frequency-adjustable dynamic vibration absorber comprises a guide rod, a middle nut, an upper nut, a lower spring, an upper spring, a lower fixed mass block, an upper fixed mass block and a plurality of frequency adjusting mass blocks, wherein the lower fixed mass block, the frequency adjusting mass blocks and the upper fixed mass block are installed on the guide rod in a sleeved mode in sequence, and the lower fixed mass block, the frequency adjusting mass blocks and the upper fixed mass block are fixed on the guide rod through pretightening force due to the matching between the middle nut and the lower spring and the matching between the upper nut and the upper spring. According to the three-way frequency-adjustable dynamic vibration absorber, due to the fact that the guide rod, the upper fixed mass block and the lower fixed mass block are assembled together, uniform vibration absorption frequency is achieved in any direction of the guide rod, and then uniform vibration absorption performance in the three directions are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of vibration and noise control, and in particular relates to a three-way frequency-adjustable dynamic vibration absorber. Background technique [0002] When naval equipment (such as various types of fans, water pumps, oil pumps, etc.) is running, the inertial force generated by eccentricity will vibrate the equipment feet. The three orthogonal components of machine foot vibration are often at the same magnitude, and may even be basically the same, but it is difficult to determine the main direction of machine foot vibration before testing the equipment. Therefore, there is an objective need for a vibration absorber capable of suppressing vibrations in three directions. At present, domestic vibration absorbers only have the function of absorbing vibration in one or two directions, which cannot meet the needs of three-way vibration absorption. [0003] At the same time, because most of the equipment on the s...

Claims

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Application Information

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IPC IPC(8): F16F7/00F16F7/104
Inventor 张针粒余永丰鲁民月刘记心李强李红刚商超
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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