Introduction to Shock Absorber

A shock absorber or (oil shock damper) is a mechanical or hydraulic device designed to absorb and damp shock impulses. It does this by converting the kinetic energy of the shock into another form of energy (typically heat) which is then dissipated. A shock absorber is a type of dashpot.Pneumatic and hydraulic shock absorber is used in conjunction with cushions and springs. An automobile shock absorber contains spring-loaded check valves and orifices to control the flow of oil through an internal piston (see below).One design consideration, when designing or choosing a industrial shock absorber, is where that energy will go. In most shock absorbers, energy is converted to heat inside the viscous fluid. In hydraulic cylinders, the hydraulic fluid heats up, while in air cylinders, the hot air is usually exhausted to the atmosphere. In other types of shock absorbers, such as electromagnetic types, the dissipated energy can be stored and used later. In general terms, shock absorbers help cushion vehicles on uneven roads.

Pneumatic shock absorber in various industries

Holid industrial shock absorbers are used in various industries, like factory automation, heavy industry, defense industry and health machines, to save costs, improve machine efficiency, increase machine operating life and reduce noise pollutions and maintenance costs. As a hydraulic shock absorber manufacturer, Holid manufactures adjustable and self-adjusting shock absorbers, hydraulic buffers (crane buffers), hydro checks and gas springs. 

The working principle of the double acting shock absorber

The working principle of the double acting shock absorber is that: in the compression stroke, namely the automobile wheels move close to the automobile body, the shock absorber is compressed, the piston 3 of the hydraulic oil shock absorber moves downward, the volume of the lower cavity of the piston is decreased, the oil pressure rises, the oil flows to the cavity (upper cavity) above the piston via the passing valve 8, and the partial space of the upper cavity is occupied by the piston rod 1, so that the increased volume of the upper cavity is less than the decreased volume of the lower cavity, some oil pushes the compression valve 6 and flows back to the oil cylinder 5, and the oil-saving action of these valves forms the damping force against the compressed motion of the suspension; in the stretching stroke of the shock absorber, the wheels are relatively away from the automobile body, the shock absorber is stretched, the piston of the shock absorber moves upward, the oil pressure of the lower cavity of the piston rises, the passing valve 8 is closed, the oil in the upper cavity pushes the stretching valve 4 and flows to the lower cavity; and because of the existence of the piston rod, the oil flowing from the upper cavity is not enough to fill up the increased space of the lower cavity, so that a certain vacuum degree is generated in the lower cavity, the oil in the oil storage cylinder pushes the compensation valve 7 and flows to the lower cavity for supplement, and the throttling action of these valves forms the damping force against the stretching motion of the suspension.

Movement of the piston within the industrial shock absorber

Up and down movement of the piston within the industrial shock absorber, the shock absorber fluid cavity they repeatedly from one chamber into the other through different pore cavity.In this case internal friction and fluid friction and oil molecules between the cell walls between the form of vibration damping force, making the car shake energy into heat oil, then absorbed by the shock absorber distributor to the atmosphere. When the oil passage section and other factors constant, the relative velocity damping force with the frame and axle (or wheel) between the increase and decrease, and with oil viscosity related.

Introduce the principle of a hydraulic damper

Oil Hydraulic Damper is a 1970s developed speed responsive damping device, which by means of special structures valve control cylinder piston moves to curb piping or equipment periodic load and shock load affected. Holid pneumatic component is mainly used to prevent damage to piping or equipment due to the earthquake, water hammer, steam hammer, wind load, exhaust valve and other impact loads caused. Working process of hydraulic damper can be "hardness and softness" to describe, in the normal thermal expansion of piping or equipment can move slowly along, at which time almost no damping force, then the performance of the "soft"; hydraulic damping during load transients the valve is activated, this time with the vibration force which produces the reverse resistance of the same size, a greater throttling piping or equipment vibrations, reduce the amplitude, which play a role in the protection of pipes or equipment, then the performance of the "Gang . "