Working principle of gas spring: Using inert gas as the elastic medium and oil (such as 50% transformer oil and 50% turbine oil) for sealing, lubrication and pressure transmission. It is a variant of sleeve-type air spring, aiming to further improve the elastic characteristics of sleeve-type air spring. Therefore, it also has the general characteristics of air spring structure. Gas springs are usually composed of cylinder, piston (rod), seal and external connectors. High-pressure nitrogen or inert gas and oil form a circuit in the cylinder. The damping on the piston connects the rod chamber and the rodless chamber, making the pressures of the two chambers equal. The elastic force is generated by using the difference in the force-receiving areas of the two chambers and the compressibility of the gas. Gas springs have the advantages of lightweight structure, large working stroke, stable movement, damping and buffering effect, stable and nearly constant characteristic line, easy operation and high safety and reliability, but the processing cost is relatively high.
Compressed gas spring, also known as support rod, mainly plays a role of support and assistance. There is no pause in the stroke and it can stay at the minimum and maximum positions of the stroke. Its advantages lie in beautiful appearance, convenient use, small occupied space and strong interchangeability. It is now widely used in industries such as automobiles, textile machinery, printing equipment, office equipment, and construction machinery.
At present, compressed gas springs have developed into two major varieties: fixed damping gas springs and variable damping gas springs. Fixed damping gas springs are damped through the piston damping hole; variable damping gas springs are damped through the damping groove on the gas spring cylinder. In addition, there are gas springs with safety protection devices. If the gas spring fails during use, the safety protection device can effectively support the support object to prevent safety accidents.Its characteristic is that it can be rigidly locked in the stretching direction. Due to the small gas space and small compressible range, the locking force in the compression direction is relatively large. The elastic ratio can be adjusted according to the change of the position of the floating piston. The disadvantage is that for a certain length of cylinder body, the stroke is relatively small and the ratio of stroke to cylinder body is relatively large. It can be applied to any mechanical mechanism that requires angle adjustment, vertical height adjustment, or horizontal adjustment and at the same time has rigid locking in the stretching direction or has a relatively large locking force in the compression direction. The two ends can be connected in multiple connection methods.
