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What are the classification of gas springs? What are the characteristics?

Update:20-04-2020
Summary:

1. Free gas spring (Lift gas spring) is the most widely […]

1. Free gas spring (Lift gas spring) is the most widely used gas spring. It mainly plays a supporting role, with only the shortest and longest positions, and cannot stop by itself during the trip. It is the most widely used in automobile, textile machinery, printing equipment, office equipment, engineering machinery and other industries. With its characteristics of light weight, smooth operation, convenient operation, and favorable price, free gas springs have been widely used in automotive, engineering machinery, printing machinery, textile equipment and other industries. Or alpine environment, acidic or alkaline environment, etc. A
2. Self-locking gas springs (angle adjusters, controllable gas springs) (Lockable gas spring) are most commonly used in medical devices. This kind of gas spring can be stopped at any position in the stroke by means of some release mechanisms, and after stopping it has a large locking force (it can reach more than 10000N).
3.The damper (Damper) is used more in automobiles and medical equipment, and its characteristic is that the resistance changes with the speed of operation. It can obviously buffer the speed of the connected mechanism. The damper is mainly used for buffering. Its biggest feature is that the force of the gas spring changes with the change of the movement speed. When the action point of the force guiding the gas spring moves faster, the resistance of the spring increases significantly, and when the action point moves slowly, the resistance is almost no. Dampers are mainly used in washing machines, refrigerators and other industries.
4. Traction gas springs (Gas traction springs) are a special kind of gas springs: other gas springs are in the longest position when they are in a free state, that is, they are the longest after receiving external forces. The position moves toward the shortest position, and the free state of the traction gas spring is in the shortest position, and runs from the shortest point to the longest point when being pulled. There are corresponding free type and self-locking type in traction gas spring.
In addition, there are ordinary steel gas springs and stainless steel gas springs. Ordinary steel gas springs are the most used, and stainless steel gas springs are mostly used in places with strict environmental requirements, such as food machinery, medical equipment, military industry, high temperature characteristics and applications.
Judging the quality of a gas spring
Judging the quality of a gas spring is mainly considered from the following aspects: first, its tightness, if the tightness is not good, there will be oil leakage, gas leakage and other phenomena during use; second, accuracy, such as 500N For gas springs, the force error produced by some manufacturers does not exceed 2N, and the products of some manufacturers may be far from the actual required 500N; again, the service life is calculated by the number of times it can be fully extended; the last is The force value changes during the stroke, and the gas spring under ideal conditions should remain unchanged throughout the stroke. However, due to design and processing factors, the force value of the gas spring during the stroke inevitably changes. The range of change is an important criterion for measuring the quality of a gas spring. The smaller the range of change, the better the quality of the gas spring, and the worse it is!