升降貨梯http://www.weheartgrub.com/速度不穩定主要是由液壓系統提升調速回路設計不合理造成，那么對于升降貨梯上升速度有哪些規定呢？

1、當升降貨梯負載不變時，節流閥口進越小，則系統速度剛度進越高；反之，若節流閥開口面積越大，則進越低。
When cargo lifter constant load, throttle opening into the smaller, the system speed into higher stiffness; on the contrary, if the larger throttle opening area, then into the lower.

2、當升降貨梯負載不變時，低速下的速度剛度好，當負載變化時，負載小時的速度剛度好。
When constant load cargo lifter, low speed speed stiffness, when the load changes, load hour speed stiffness.

3、提高升降貨梯http://www.weheartgrub.com/供油壓力加大液壓缸有效作用面積，可提高速度剛度。
Increasing pressure to improve cargo lifter oil hydraulic cylinder effective action area, the speed can be increased stiffness.