套筒式氣彈簧有一根直徑較大的活塞桿，活塞上開有一個節(jié)流小孔，使活塞左右兩腔相通，其工作原理是：當套筒內(nèi)腔充入有壓力的氣體后，因活塞上有一節(jié)流小孔，使活塞左右兩腔壓力相等，可見該套筒內(nèi)的活塞是按差動原理工作的。由于有一根直徑較大的活塞桿，使活塞右腔的受力大干左腔的受力，因而在活塞上作用著一個復(fù)位力，活塞在此復(fù)位力的推動下，將移動到左端位置。當用手力加大載荷時，可克服活塞的復(fù)位力，使活塞緩慢移動到右端位置，這時可用機械機構(gòu)將負載鎖緊，當打開鎖緊機構(gòu)后，復(fù)位力則克服負載，使負載在括塞復(fù)位力的推動下，自動復(fù)位回到開始位置。
套筒式氣彈簧具有以下一些特點：
(1)對于同一內(nèi)徑的套筒式氣彈簧，當內(nèi)腔充氣壓力增大時，復(fù)位力隨著壓力的增大而增大，這使得同一種套筒式氣彈簧，可以適應(yīng)多種負載的要求。
(2)活塞上開有節(jié)流小孔，當空氣流過節(jié)流小孔時，由于氣阻而吸收一部分振動能量，從而起到了減振阻尼作用。
(3)與鋼彈簧相比，在承受激烈振動載荷時，套筒式氣彈簧的壽命較長，在同樣行程條件下，套筒式氣彈簧的長度較短。
(4)結(jié)構(gòu)簡單、新穎，零件較少，制造方便，成本下降。

中譯英：
Sleeve type gas spring with a larger diameter of the piston rod, the piston is provided with a throttling hole, so that the piston two cavity, its working principle is: when the sleeve cavity is filled with gas pressure, the piston with a throttling hole, so that the piston cavity pressure equal to about two, the sleeve the piston is based on the differential principle. Due to a larger diameter of the piston rod, the piston force go right cavity left chamber of the force, and in the piston acting on a piston reset reset force, this force, will move to the left position. When using hand to increase the load, can overcome the piston reset force, the piston moves slowly to the right position, then available mechanical load lock, when the locking mechanism is opened, a restoring force is overcome load, the load on the piston reset force, automatic reset to return to the start location.
Sleeve type gas spring has the following characteristics:
(1) for the same inner diameter of the sleeve type gas spring, when the inner pressure increases, a restoring force as the pressure increases, which makes the same kind of sleeve type gas spring, can adapt to various requirements of the load.
(2) the piston is provided with throttling orifices, when the air flow through the throttle orifice, as air resistance and absorb a part of energy of vibration, thus played a damping effect.
(3) compared with steel springs, under the intense vibration load, sleeve type gas spring live longer, in the same stroke conditions, sleeve type gas spring of short length.
(4) has the advantages of simple structure, few parts, convenient manufacture, cost reduction.
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