Radial variable stiffness adjusting structure and method for integral liquid rubber composite joint

Abstract

The invention discloses a radial variable stiffness adjusting structure and method for an integral liquid rubber composite joint. The liquid rubber composite joint comprises a mandrel, a rubber body, a vulcanized body outer sleeve, a stop block and an integral outer sleeve, wherein the rubber body is vulcanized between the vulcanized body outer sleeve and the mandrel to form a whole, the mandrel is provided with a pit sunken towards the inner side of the mandrel, the stop block is arranged at the pit, the outer sides of the stop block and the vulcanized body outer sleeve are sleeved with the whole outer sleeve, and the rubber body vulcanized at the bottom of the pit is a radial rubber layer; and a gap is reserved between the stop block and the radial rubber layer. By adjusting the distance between the stop block and the radial rubber layer and adjusting the thickness of the radial rubber layer, two times of radial variable stiffness adjustment of the liquid rubber composite joint is achieved. The rigidity of the liquid rubber composite joint can be changed under different working conditions, so that the liquid rubber composite joint can meet different rigidity requirements of a vehicle under different working conditions.

Description

technical field [0001] The invention relates to the field of rail transit, in particular to a radial variable stiffness adjustment structure and method of a liquid rubber composite node. Background technique [0002] According to the dynamic requirements, when the rotating arm node runs in a straight line at high speed (high-frequency vibration), it provides greater radial stiffness to ensure operational stability and increase the critical speed; when it passes through the curve (low frequency and large amplitude), it provides a smaller radial stiffness. Stiffness performance ensures over-curve performance and reduces wear; ordinary nodes are difficult to achieve the above characteristics, especially for old lines, wheel rails and lines wear a lot, and maintenance costs are high, so it is necessary to use a new product that has the above characteristics at the same time - liquid rubber compound node. [0003] The working principle of the liquid rubber composite joint is mai...

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Problems solved by technology

[0002] According to the dynamic requirements, when the rotating arm node runs in a straight line at high speed (high-frequency vibration), it provides greater radial stiffness to ensure operational stability and increase the critical speed; when it passes through the curve (low frequency and large amplitude), it provides a smaller radial stiffness. Stiffness performance ensures over-curve performance and reduces wear; ordinary nodes are difficult to achieve the above characteristics, especially for old lines, wheel rails and lines wear a lot, and maintenance costs are high, so it is necessary to use a new product that has the above characteristics at the same time - liquid rubber compound node

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