What are the classifications of shock absorbers?

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What are the classifications of shock absorbers?

From the perspective of generating damping materials, shock absorbers mainly include hydraulic and pneumatic shock absorbers, and there is also a variable damping shock absorber.

Hydraulic shock absorbers are widely used in automobile suspension systems. The principle is that when the frame and the axle reciprocate and the piston reciprocates in the cylinder of the shock absorber, the oil in the shock absorber shell will repeatedly flow from the inner cavity through some narrow pores into the other. An inner cavity. At this time, the friction between the liquid and the inner wall and the internal friction of the liquid molecules form a damping force against vibration.

Inflatable shock absorber is a new type of shock absorber developed since the 1960s. Its structural feature is that a floating piston is installed in the lower part of the cylinder, and a closed air chamber formed by the floating piston and one end of the cylinder is filled with high-pressure nitrogen. A large-section O-ring seal is installed on the floating piston, which completely separates the oil and gas. The working piston is equipped with a compression valve and an expansion valve that change the cross-sectional area of ​​the channel according to its moving speed. When the wheel bounces up and down, the working piston of the shock absorber reciprocates in the oil, causing an oil pressure difference between the upper cavity and the lower cavity of the working piston, and the pressure oil pushes the compression valve and the expansion valve to flow back and forth. Because the valve produces a relatively large damping force on the pressure oil, the vibration is attenuated.

Structural perspective division
The structure of the shock absorber is that the piston rod with the piston is inserted into the cylinder, and the cylinder is filled with oil. The piston has an orifice so that the oil in the two spaces separated by the piston can supplement each other. Damping is produced when viscous oil passes through the orifice. The smaller the orifice, the greater the damping force, and the greater the viscosity of the oil, the greater the damping force. If the size of the orifice remains the same, when the shock absorber works fast, the damping will affect the shock absorption. Therefore, a disc-shaped leaf spring valve is installed at the outlet of the orifice. When the pressure increases, the valve is pushed open, the opening of the orifice becomes larger, and the damping becomes smaller. Since the piston moves in both directions, leaf spring valves are installed on both sides of the piston, which are called compression valves and extension valves.

According to its structure, shock absorbers are divided into two types: single tube and double tube. It can be further divided into: 1. Single cylinder air pressure shock absorber; 2. Double cylinder oil pressure shock absorber; 3. Double cylinder oil and gas shock absorber.

Refers to the shock absorber has two inner and outer cylinders. The piston moves in the inner cylinder. Due to the entry and withdrawal of the piston rod, the volume of oil in the inner cylinder increases and shrinks. Therefore, it is necessary to exchange with the outer cylinder to maintain the oil in the inner cylinder. balance. Therefore, there are four valves in the double-cylinder shock absorber, that is, in addition to the two throttle valves on the piston mentioned above, there are also a flow valve and a compensation valve installed between the inner and outer cylinders to complete the exchange function.

Compared with the double-tube type, the single-tube type shock absorber has a simple structure and reduces a set of valve systems. It is equipped with a floating piston in the lower part of the cylinder (the so-called floating means that there is no piston rod to control its movement), and a closed air chamber is formed under the floating piston, which is filled with high-pressure nitrogen. The above-mentioned changes in the liquid level caused by the oil in and out of the piston rod are automatically adapted by the floating of the floating piston. In addition to the two shock absorbers mentioned above, there are also adjustable resistance shock absorbers. It can change the size of the orifice through external operation. Recent automobiles use electronically controlled shock absorbers as standard equipment. The driving state is detected by sensors, and the computer calculates the optimal damping force, so that the damping force adjustment mechanism on the shock absorber works automatically.


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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