CN103994300A

CN103994300A - Three-way pipeline dynamic absorber and pipeline vibration noise control method thereof

Info

Publication number: CN103994300A
Application number: CN201410161712.1A
Authority: CN
Inventors: 李吉; 常凯; 肖挺杨
Original assignee: Dalian University
Current assignee: Dalian University
Priority date: 2014-04-21
Filing date: 2014-04-21
Publication date: 2014-08-20
Anticipated expiration: 2034-04-21
Also published as: CN103994300B

Abstract

The invention discloses a three-way pipeline dynamic absorber and a pipeline vibration noise control method thereof, and belongs to the technical field of effective control over pipeline vibration noise. The three-way pipeline dynamic absorber is composed of an associated mass ring, a steel wire rope, a fixing ring, connecting bolts, a pipeline and screws, wherein the fixing ring is arranged on the outer wall of the pipeline in a tightly sleeved mode, three to six circular holes are evenly formed in the corresponding positions of the upper face of the fixing ring and the upper face of the associated mass ring, the steel wire rope is inserted into the circular holes, and the two ends of the steel wire rope are connected with the fixing ring and the associated mass ring respectively through the screws.

Description

Three-dimensional pipeline dynamic vibration absorber and pipe vibration noise control method thereof

Technical field

The invention belongs to the technical field that pipe vibration noise is effectively controlled, and formed three-dimensional pipeline dynamic vibration absorber, the three-dimensional pipeline dynamic vibration absorber that can the vibration of pipeline axial, three directions radially be control effectively and be absorbed of the pipeline vibration-absorbing denoising technological method particularly by wire rope, pipeline being connected with annular additional mass and formation.

Background technique

Pipeline is widely used in various commercial plants and living facilities, and a large amount of pipeline ubiquities that use vibrate the problems large, noise is high both at home and abroad at present.A lot of about pipe vibration noise problem researcher, its method probably can be divided into two classes.One class is to start with from pipeline configuration, material, adopts elasticity pipeline section, with absorbing, damping material, makes tube wall and in pipeline, adds (the Kong Jianyi etc. such as pulsation dampening, the control research of submarine vibration noise, noise and vibration control, 2006,26 (5)).Such measures need to be considered the impact that it produces pipeline inner fluid, implements more complicated and expense is higher, is difficult for popularizing.Another kind of is dynamic absorber technology, by add dynamic vibration absorber outward at tube wall, controls pipe vibration (Liu Yaozong etc., passive type dynamic absorber Research progress, mechanical engineering journal, 2007,43 (3); State of Zhao moves etc., the research of the complete initiatively absorbing technology experiment of Diesel Piping System, noise and vibration control, 2007,27 (5)).Dynamic vibration absorber can be used as subtense angle and is attached directly in main pipe system, and be not subject to that pipeline is high temperature resistant, restriction that high pressure and anti-leak etc. require.Whether according to it, need the external world that energy is provided, that dynamic vibration absorber can be divided into is active, passive type etc.Owing to there is the unfavorable features such as guarantee that complex structure, manufacture cost are high, need outside resources, active bump leveller has very large narrow limitation in actual applications.Passive type bump leveller is the main flow of engineering application, and correlative study has also obtained many new developments.One of subject matter is wherein, the vibration of arbitrary cross section in pipeline, if do not consider its rotation, can be reduced to the vibration of its kernel of section point, the vibration of this point can be decomposed into three oscillating components: one axially, two radially, adopt conventional single-degree-of-freedom dynamic vibration absorber can only control an oscillating component, but so the compacter practicality of the research structure more much higher degrees of freedom dynamic vibration absorber of efficiency that shakes become one of important developing direction of pipeline dynamic absorbing technology.

Summary of the invention

The present invention is exactly the problem for the Noise and Vibration Control existence of above-mentioned pipeline, a kind of three-dimensional pipeline dynamic vibration absorber that pipe vibration noise is control effectively and pipe vibration noise control method thereof are provided, three-dimensional pipeline dynamic vibration absorber is comprised of associated mass ring, wire rope, retaining ring, connecting bolt, pipeline and screw, wherein associated mass ring is comprised of main ring and regulating ring, can be along any direction free vibration, wherein regulating ring is to finely tune for quality.Retaining ring is tightly placed on pipeline outer wall, retaining ring and the uniform 3-6 of an opposite position circular port above associated mass ring, and wire rope inserts in circular port, and its two ends are connected with associated mass ring with retaining ring respectively by screw.Retaining ring and associated mass ring are all designed to the form of two semicircular ring docking, and utilizing connecting bolt is an annulus by two semi-ring docking, to facilitate installation.

As the wire rope quantity of elastic element, be at least 3 and be arranged symmetrically with, to guarantee that radial rigidity is symmetrical, must be consistent with radial rigidity by regulating wire rope axial length to realize axial rigidity; Outer surface sulfuration one deck rubber layer of wire rope, to increase the damping of bump leveller, and then increases absorbing frequency bandwidth, to adapt to the fluctuation of pipe vibration frequency.

Pipe vibration noise control method, according to the frequency of pipe vibration, by length, rigidity, the quantity of rational wire rope are set, the quality size of associated mass ring is controlled the frequency of bump leveller, the frequency of bump leveller should be consistent with the frequency of pipe vibration, to reach the object of effective control pipe vibration and noise.

Compared with the prior art, tool has the following advantages in the present invention:

(1) utilize the peculiar quality symmetry properties of said structure and rigidity symmetry properties, can obtain each to identical natural frequency, thereby can make bump leveller that the vibration of pipeline axial, three directions is radially controlled and absorbed simultaneously;

(2) overcome the measure that need to change pipeline configuration and material and implement the shortcoming complicated, expense is higher, can be made into the form of two semicircular ring docking, easy to use, and be not subject to that pipeline is high pressure resistant, restriction that anti-leak etc. requires;

Adopt passive type dynamic absorber principle design, overcome the shortcomings such as guarantee that active power bump leveller complex structure, manufacture cost are high, need outside resources.

Accompanying drawing explanation

Fig. 1 is three-dimensional pipeline dynamic vibration absorber side view of the present invention

As shown in FIG.: 1, main ring; 2, wire rope; 3, retaining ring; 4, connecting bolt; 5, pipeline; 6, screw; 7, regulating ring; 8, rubber layer

Embodiment

Example below in conjunction with accompanying drawing further illustrates.Three-dimensional pipeline dynamic vibration absorber of the present invention is comprised of associated mass ring, wire rope 2, retaining ring 3, connecting bolt 4 and screw 6, and in figure, 5 is pipeline.Wherein associated mass ring is comprised of main ring 1 and regulating ring 7, can be along any direction free vibration, and wherein regulating ring 7 is finely tuned for quality.Retaining ring 3 is tightly placed on the outer wall of pipeline 5, retaining ring 3 and uniform six circular ports above associated mass ring, and wire rope 2 inserts in these holes, and its two ends are connected with associated mass ring with retaining ring 3 respectively by screw 6.Retaining ring 3 and associated mass ring are all designed to the form of two semicircular ring docking, and can utilize connecting bolt 4 is an annulus by two semi-ring docking, to facilitate installation.As wire rope 2 quantity of elastic element, be at least 3 and be arranged symmetrically with, to guarantee that radial rigidity is symmetrical, must be consistent with radial rigidity by regulating wire rope 2 axial lengths to realize axial rigidity; Outer surface sulfuration one deck rubber layer 8 of wire rope 2, to increase the damping of bump leveller, and then increases absorbing frequency bandwidth, to adapt to the fluctuation of pipe vibration frequency.This dynamic vibration absorber can be transferred to the vibrational energy of pipeline 5 on associated mass ring, and utilizes the damping characteristic of wire rope 2 that vibrational energy is consumed gradually, sponged.By rational structure and parameters is set, if length, rigidity, sth. made by twisting by controlling wire rope 2 are to regulating its elasticity and damping characteristic with the parameter such as bending part curvature, by controlling the parameters such as density, internal-and external diameter length of associated mass ring, regulate its size and quality size etc., can to pipeline axial, radially and the vibration of three directions reversing around axis controlled and absorbed, can obtain and fall low noise effect simultaneously.

Claims

1. three-dimensional pipeline dynamic vibration absorber, by associated mass ring, wire rope (2), retaining ring (3), connecting bolt (4), pipeline (5) and screw (6), formed, it is characterized in that: associated mass ring is comprised of main ring (1) and regulating ring (7), wherein retaining ring (3) is tightly placed on pipeline (5) outer wall, retaining ring (3) and uniform six circular ports of opposite position above associated mass ring, wire rope (2) inserts in circular port, its two ends are connected with associated mass ring with retaining ring (3) respectively, fixing by screw (6).

2. three-dimensional pipeline dynamic vibration absorber according to claim 1, is characterized in that: retaining ring (3) and associated mass ring are all designed to the form of two semicircular ring docking, and utilizing connecting bolt (4) is an annulus by two semi-ring docking.

3. three-dimensional pipeline dynamic vibration absorber according to claim 1, it is characterized in that: wire rope (2) quantity is at least 3 and is arranged symmetrically with, to guarantee that radial rigidity is symmetrical, must be consistent with radial rigidity by regulating wire rope (2) axial length to realize axial rigidity; Outer surface sulfuration one deck rubber layer (8) of wire rope (2), to increase the damping of bump leveller, and then increases absorbing frequency bandwidth, to adapt to the fluctuation of pipe vibration frequency.

4. pipe vibration noise control method, it is characterized in that: according to frequency and the amplitude of pipeline (5) vibration, by length, rigidity, the bending part curvature of rational wire rope (2) are set, the internal-and external diameter of associated mass ring and frequency that quality size is controlled bump leveller and the number of absorbing vibrational energy, the frequency of bump leveller should be consistent with the frequency of pipeline (5) vibration, the vibrational energy absorbing should be greater than 50% of pipeline (5) vibrational energy, to reach the object of effective control pipeline (5) vibration and noise.