Low rigidity rubber balance tube

Abstract

A rubber balance tube with low rigidity is prepared for setting intermediate portion of rubber body to be in hollow closed ring form, contacting two external side surfaces of said intermediate portion separately to internal side surfaces of front and back balance rings and firm-fixing an intensified ring on external cylindrical wall of said intermediate portion of rubber body.

Description

Technical field: [0001] The invention relates to an adjustable connection of pipe fittings, especially a connection including flexibility. Background technique: [0002] In mechanical equipment, the hazards of vibration and noise are well known. In view of this, the industry adopts various vibration isolation technologies on the installation base, and the transmission of vibration and noise can be clearly controlled. Therefore, in mechanical equipment, through pipes The vibration and noise problems transmitted by the "second channel" of the road are highlighted in front of people, which has attracted the attention of the industry. Under the existing technical conditions, the technical solution of flexible joints is generally used to reduce the vibration and noise of the pipeline. Among them: such as the thick-walled straight-through flexible joint, which has a simple structure, but due to the high rigidity of the joint, the effect of vibration and noise reduction is not good...

AI Technical Summary

Problems solved by technology

[0002] In mechanical equipment, the hazards of vibration and noise are well known. In view of this, the industry adopts various vibration isolation technologies on the installation base, and the transmission of vibration and noise can be clearly controlled. Therefore, in mechanical equipment, through pipes The vibration and noise problems transmitted by the "second channel" of the road are highlighted in front of people, which has attracted the attention of the industry. Under the existing technical conditions, the technical solution of flexible joints is generally used to reduce the vibration and noise of the pipeline. Among them: such as the thick-walled straight-through flexible joint, which has a simple structure, but due to the high rigidity of the joint, the effect of vibration and noise reduction is not good, and the spherical thin-walled flexible joint overcomes the defects of the former and can reduce vibration and noise. The effect is good, but its structure is an unbalanced connection. After charging, it will generate axial additional force on the pipeline or equipment. The commonly used nominal pressure is generally below 2.0MPa, and it can only be used for vibration reduction and noise reduction of medium and low pressure pipelines. needs; in response to the above problems, the industry proposes a technical solution such as figure 1 As shown, it is a rubber balance tube structure. The technical solution is composed of front flange 91, tie rod bolt 92, front balance ring 93, rubber block 94, rear balance ring 95 and rear flange 96, among which the rubber block 94 It is composed of the front body 941, the middle body 942 and the rear body 943, but each block does not connect with the inner cavity of the connecting pipe, thus forming a three-stage structure, the front and rear flanges 91, 96 and the alternate front and rear flanges The balance rings 95, 93 are respectively penetrated and connected by tie rod bolts 92. When the rubber balance tube is pressurized, the front and rear flanges 91, 96 at the ends bear the outward axial force, and the opposite front and rear balance rings 95, 96 The axial force borne by 93 is opposite to it, so as to realize the balance of the connecting pipe. The size of the metal member front flange 91, front and rear balance rings 93, 95 and rear flange 96 is selected in the following way, that is, the effective diameter of the middle section of the connecting pipe D. 1 (like figure 1 ) is about the effective diameter D of both ends 2 √2 times, the exact balance condition is determined according to the finite element simulation results

With the above structural conditions, the rubber balance tube has good balance, but, D 1 =√2D 2 Due to the technical conditions, the thickness of the intermediate body 942 is increased. Especially in the design of high pressure and large-diameter joints, in order to maintain the strength and balance of the components, the thickness of the intermediate body is too large, resulting in greater structural rigidity and thus weakening its vibration damping and drop. Noise function, and waste materials, its production cost is also higher

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