A Novel Variable Stiffness Semi-Active Pipeline Vibration Absorber

A shock absorber and variable stiffness technology, applied in the direction of shock absorbers, shock absorbers, pipe components, etc., can solve the problems of reduced efficiency of shock absorbers, inability to respond well to vibration shocks, and inability to adjust, achieving high reliability, Simple structure, fast response effect

CN105972370BActive Publication Date: 2018-10-26HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-10-26

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Abstract

The invention provides a novel variable-rigidity semi-active pipeline vibration absorber which comprises a circular clamping ring and a main vibration absorber body. The novel variable-rigidity semi-active pipeline vibration absorber is characterized in that the main vibration absorber body comprises four sub vibration absorber bodies symmetrically arranged on the outer surface of the circular clamping ring; each sub vibration absorber body comprises two leaf springs, an inertia mass block and laminated polyvinylidene fluoride (PVDF) actuators arranged on the upper surface and the lower surface of each leaf spring; and a flat ring structure is formed after the two leaf springs of each sub vibration absorber body are in butt joint, one end of the flat ring structure is connected with the circular clamping ring, and the other end of the flat ring structure is connected with the inertia mass block. The novel variable-rigidity semi-active pipeline vibration absorber is convenient to install, simple in structure, high in reliability and wide in applicable frequency band range, the frequency of the vibration absorber can be adjusted according to the change of the pipeline vibration frequency, and therefore the requirements for vibration reduction and noise reduction of pipelines are met. The novel variable-rigidity semi-active pipeline vibration absorber is valuable particularly in meeting the acoustic stealth requirement of pipeline systems of modern ships and submarines.
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Description

technical field

[0001] The invention relates to a vibration absorber, in particular to a novel variable stiffness semi-active pipeline vibration absorber, which belongs to the field of vibration absorbers. Background technique

[0002] Ships and submarines have complex piping arrangements. Piping also provides a path for the transmission of vibration and noise. Mechanical equipment can transmit vibration and noise to the ship structure through the pipeline system; secondly, when equipment such as sea water pumps work, it will inevitably cause the pressure and flow pulsation of the liquid in the pipe to cause pipeline vibration, reduce the service life of the pipeline, and affect Crew comfort, reducing the ship's "acoustic stealth" performance.

[0003] The vibration and noise source suppression of the ship pipeline system can be started from two aspects. One is to reduce the transmission of various power mechanical equipment vibrations to the pipeline, and vibration isolat...

Examples

Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] combine figure 1 and figure 2 , the present invention includes a clamping ring 5 and four sub-vibration absorbers, and the four sub-vibration absorbers are arranged in a 90° circumferential direction. Further, the sub-vibration absorbers and the clamping ring are fixed by bolts. Each sub-vibration absorber consists of two leaf springs 4, a stacked PVDF actuator 2, and an inertial mass block 1, consisting of figure 2 It can be obtained that the laminated PVDF actuator 2 is pasted on the upper and lower surfaces of the leaf spring 4 with epoxy resin. The leaf spring is selected from spring steel 65Mn with good elasticity. The thickness expansion and deformation direction of the laminated PVDF actuator is along the length direction of the leaf spring.

[0018] The laminated PVDF actuator 2 is formed by bonding N pieces (can ...