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.

The miniature shock absorbers delivers very short overall lengths and low return forces

The miniature shock absorbers delivers very short overall lengths and low return forces.The outer body of each shock, produced from one solid piece, is filled with temperature stable oil, offers a continuous outer body thread including a supplied lock nut and also has an integrated positive stop. These maintenance-free hydraulic machine elements from Holid are ready for immediate installation. A wide range of energy absorption and effective weight are further benefits in these compact units. Self-compensating double acting shock absorber react to changing energy conditions, without adjustment.

Pneumatic shock absorber provide linear deceleration

Industrial shock absorbers convert the kinetic energy of a load into heat which is dissipated into the atmosphere. They stop a moving load with no rebound and without transmitting potentially damaging shocks to equipment. In its most general form, a shock absorber consists of

• a double-walled cylinder with space between the concentric inner and outer walls,

• a piston,

• some means of mechanical return for the piston, and

• a mounting plate. The piston usually is returned to its initial position by a spring, which can be mounted externally around the piston rod or internally on the inside of the cylinder body.

A series of orifices is drilled in the inner cylinder wall at exponential intervals. The reason for the exponential spacing is derived from the equation for kinetic energy: KE= ½ mv2. The cylinder is filled with fluid, and all air is bled from the fluid because air bubbles cut the efficiency of the shock absorbers by causing spongy or erratic action.

When a moving load contacts the piston rod, it moves the piston inward, forcing fluid through the orifices in the inner cylinder wall. The fluid is forced through the oil return passages, into the space be hind the piston head. As the piston retracts, it closes the orifices behind it, reducing the effective metering area, and maintaining a uniform deceleration force as the load loses its energy.

Fluid pressure is constant in a double acting shock absorber , providing constant resistance to the load. The load slows to a stop as its kinetic energy approaches zero. No rebound occurs because the shock absorber stores no energy. Several events must happen for the piston to return to its extended position. First, the load must be removed. The spring then pushes the piston outward, opening a check valve, which lets fluid flow from behind the piston to the space the piston was in its retracted position. Smaller shock absorbers, (bores less than 3 in.) have a ball check valve to control fluid flow. Larger models use a piston-ring check valve.

How Shock Absorbers Function

The top of a double acting shock absorber is mounted to the frame and the bottom is mounted to a fixture on the suspension or axle in the vicinity of each wheel. In simple terms, a piston inside the interior cylinder of the shock moves up and down through oil that is sealed within the cylinder. Small holes in the piston slow the movement of the piston and provide the dampening effect of the oil shock damper. The piston is mounted on a shaft that runs out the top of the shock cylinder; a seal around the shaft keeps oil from leaking out of the cylinder. The shaft is a part of the top of the shock that attaches to the frame, while the cylinder is a part of the bottom of the shock that attaches to the axle or suspension.

Pneumatic shock absorbe-machine shock absorbers

This complete the range of machine shock absorbers which now cover an Effective weight range from 0.3kg up to 200,000kg. In comparisan with the earlier SAHS range the new A2 has 70% and the new A3 25% higher capacity. double acting shock absorber is Steel body with black oxide finish.Piston rod high tensile steel, hardened and chrome plated.Return spring zinc plated.To advoid reducing heat dissipation do not paint.

Construction of oil shock absorbers

Hydraulic oil shock absorber through a unique structure designed to allow movement of the moving object can be converted into heat energy, atmospheric emissions again, is the best double acting shock absorber to absorb impact energy, soft stop. For a device, the device class to reduce wear, reduce the amount of maintenance to extend the life expectancy, especially for improving production efficiency plays an important role, please use.

The impact of fluid circulation patterns moving object compression piston check valve will close, because the oil squeeze through the hole into the accumulator. After the lifting of the impact of the piston rod reset spring, check valve automatically opens at the same time, rapid back into the oil tank.