升降貨梯支撐導向環的作用除支承和導向外，還避免了活塞與缸體、活塞與缸蓋之間的磨損，保持缸體與活塞、活塞桿與液壓缸蓋的同軸度。液壓缸的支承導向環的材料一般為具有良好自潤滑性能及抗磨性能的工程塑料。

1、升降貨梯支撐導向環不拉缸，低泄漏。支承環將活塞外表面與缸筒內壁完全隔開，無論“憋勁”現象多么嚴重，也不發生“拉缸”現象，而且由于摩擦副同軸度較高，徑向間隙較均勻，故泄漏少。
Hangzhou freight elevators support guide ring does not pull the cylinder, low leakage. The outer surface of the support ring piston and cylinder inner wall completely separated, no matter how serious, "Bie Jin" phenomenon does not happen "pull-cylinder" phenomenon, but also because of the higher friction concentricity, radial clearance is uniform, so the leak less.

2、升降貨梯支撐導向環拋光細化液壓缸缸筒內壁，保護密封件。活塞上的支承環相對缸筒內壁面作往復滑動，等于用軟的基體對缸壁拋光，因此，表面粗糙度越用越低，越用越好。拋光下來的微小金屬粉 末嵌在支承環的軟表面內，能保護杭州貨梯密封件。
Hangzhou freight elevators support guide ring polished refinement cylinder cylinder wall, to protect seals. Support ring on the piston relative to the cylinder wall for reciprocating sliding, equal to the base with a soft polishing of the cylinder wall, so the more you use, the lower the surface roughness, the more you use, the better. Polishing down the tiny metal powder embedded in the soft surface of the support ring seals to protect Hangzhou freight elevator.

3、升降貨梯支撐導向環具有良好的承載能力，更換方便，導向環為開口狀浮動式，磨損后更換十分方便。
Hangzhou freight elevators support guide ring has a good carrying capacity, easy to replace, guide ring-shaped floating openings, replace worn very convenient.