How the shock absorber works

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How the shock absorber works

In the suspension system, the elastic element is shocked to produce vibration. In order to improve the smoothness of the car, a shock absorber is installed in parallel with the elastic element in the suspension to attenuate the vibration. The shock absorber used in the automobile suspension system is mostly hydraulic shock absorber. The working principle of the shock absorber is that when relative movement occurs between the frame (or body) and the axle, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly passes through different chambers. The pore flows into another cavity. At this time, the friction between the hole wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, so that the vehicle vibration energy is converted into oil heat, which is then absorbed by the shock absorber and emitted into the atmosphere. When the oil channel cross-section and other factors remain unchanged, the damping force increases or decreases with the relative movement speed between the frame and the axle (or wheel), and is related to the oil viscosity.

The shock absorber and the elastic element undertake the task of cushioning and damping shock. Excessive damping force will deteriorate the elasticity of the suspension and even damage the shock absorber connector. Therefore, it is necessary to adjust the contradiction between the elastic element and the shock absorber.

(1) In the compression stroke (the axle and the frame are close to each other), the damping force of the shock absorber is small, so as to give full play to the elastic effect of the elastic element and alleviate the impact. At this time, the elastic element plays a major role.

(2) During the extension stroke of the suspension (the axle and the frame are far away from each other), the damping force of the shock absorber should be large, and the shock should be absorbed quickly.

(3) When the relative speed between the axle (or wheel) and the axle is too large, the shock absorber is required to automatically increase the fluid flow so that the damping force is always kept within a certain limit to avoid excessive impact Load.

In the automobile suspension system, the barrel type shock absorber is widely used, and it can play the role of damping in both compression and extension strokes. It is called a two-way-acting shock absorber. There are also new types of shock absorbers, which include inflatable shock absorbers. Shock and resistance adjustable shock absorber.

Description of the working principle of the two-way cylinder shock absorber: During the compression stroke, it means that the car wheel moves closer to the car body and the shock absorber is compressed. At this time, the piston in the shock absorber moves downward. The volume of the lower chamber of the piston decreases, the oil pressure rises, and the oil flows through the flow valve to the chamber (upper chamber) above the piston. The upper cavity is occupied by a part of the space by the piston rod, so the increased volume of the upper cavity is less than the reduced volume of the lower cavity, so a part of the oil will push open the compression valve and flow back to the oil storage cylinder. The oil saving of these valves forms the damping force of the suspension under compression movement. When the shock absorber is stretched, the wheel is equivalent to far away from the body, and the shock absorber is stretched. At this time, the piston of the shock absorber moves upward. The oil pressure in the upper cavity of the piston rises, the flow valve is closed, and the oil in the upper cavity pushes open the expansion valve and flows into the lower cavity. Due to the existence of the piston rod, the oil flowing from the upper cavity is not enough to fill the increased volume of the lower cavity, and the lower cavity is mainly caused to generate a vacuum degree. At this time, the oil in the oil storage cylinder pushes open the compensation valve 7 and flows into the lower cavity. add. Due to the throttling effect of these valves, the suspension has a damping effect during extension movement.

Because the spring stiffness and pre-tightening force of the expansion valve are designed to be greater than that of the compression valve, under the same pressure, the sum of the channel load area of ​​the expansion valve and the corresponding normally open gap is smaller than the sum of the cross-sectional area of ​​the compression valve and the corresponding normally open gap. This makes the damping force generated by the extension stroke of the shock absorber greater than the damping force of the compression stroke, which meets the requirements of rapid shock absorption.

Zhejiang Yongmei Technology Co., Ltd. is famous China Motorcycle Shock Absorption Damping Manufacturers and Motorcycle Damping Adjustable Rear Left Right Shock Absorbers Suppliers, locates in Huangyan District, Taizhou City, the central part of Zhejiang Province, and the birthplace of the national private economy. The company is a high-tech company integrating research, development, design, manufacture, sales and service of shock absorbers used for yachts, water sports equipment, motorcycles, ATVs and electric vehicles. The company regards continuous innovation as its core competitiveness and regards product quality as the life of the company, all management work according to the ISO9001-2015 standard, we offer kinds of high-quality wholesale Motorcycle Damping Adjustable Rear Left Right Shock Absorbers for our customers. Now it has perfect production technology facilities, strong technical development strength and advanced technical design methods. The company has won the honors of Intellectual Property Consultant Unit, City-level High-tech Research Center, Taizhou High-tech Enterprise, Zhejiang Science and Technology SMEs, Quality Service Credit AAA Unit, National Consumer Satisfaction Brands, Product Service Credit AAA Unit. The company's Qili brand shock absorber products have more than 200 national patents which were awarded China Famous Brand and China Famous Brand.

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