Damper with axial guiding device

Abstract

The invention relates to a damper, comprising a cylinder body and a moving body; the moving body is at least positioned in the cylinder body partially, the cylinder body is internally provided with at least one chamber extending along the axial direction, and the chamber is filled with viscous damping liquid so as to form a damping chamber; the damper is characterized in that the moving body consists of moving blades arranged in the damping chamber correspondingly; the moving blades and the wall of the damping chamber form a shearing cavity; the thickness of the shearing cavity is far less than the axial dimension thereof; an axial guiding device is arranged between the cylinder body and the moving body. The damper provided with the axial guiding device of the invention has simple structure and no precision parts, so the manufacturing cost is low, the performance is stable and the working is reliable; due to no wear parts, the maintenance is not needed basically with long service life; the damper can be continuously used after maintained, and has the advantages of regenerative characteristic and environmental protection.

Description

technical field [0001] The present invention is a divisional application with application number 200410075501.2, and relates to dampers, especially shock absorbers for vehicle suspension systems and vibration-absorbing and energy-consuming dampers for building structures. Background technique [0002] Damper is a widely used vibration control basic element, which is used for vibration reduction, buffering and energy dissipation of machinery, vehicles, bridges and building structures. [0003] The common damper is hydraulic cylinder type. The piston moves relative to the cylinder only in the axial direction. It is called a uniaxial damper. It consists of a moving body, a moving body rod, a cylinder body and a seal. The moving body is generally cylindrical. The moving body is provided with a number of small holes or there is a proper radial clearance between the cylinder and the moving body. The moving body divides the cylinder into two moving body cavities, and the moving bod...

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Problems solved by technology

However, due to structural reasons, it has inherent defects: 1) Due to the static friction and sliding friction between the seal and the piston rod, and the piston and the damping cylinder, the starting resistance is relatively large, and the damping force has a poor correlation with the speed when the amplitude is small. , resulting in complex theoretical calculations and large errors; 2) A tight seal must be used, but the seal is easy to wear or age. Once the seal fails, the pressure difference cannot be established, and the damping performance will be lost rapidly; 3) The structure of the parts is complex and the number is large 1. The processing precision is high, so the cost is high; 4) The damping performance is sensitive to the processing precision and the reliability of the parts. Once the important parts such as valves fail, the damping performance will drop rapidly or fail; 5) When the damping liquid is throttling through small holes, local Due to high-pressure shearing, the instantaneous heating and temperature rise are high, and it is easy to age under long-term action, resulting in the failure of the damper; 6) The sediment and wear particles in the damping liquid affect the damping parameters and accelerate the damage of the damper; due to the above reasons, this form of Shock absorbers, except for high-quality brand-name products, generally have a low lifespan. Low-end automobile shock absorbers are even replaced every six months, causing a lot of waste of resources and polluting the environment.

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