升降货梯http://www.jntr168.com/速度不稳定主要是由液压系统提升调速回路设计不合理造成，那么对于升降货梯上升速度有哪些规定呢？

1、当升降货梯负载不变时，节流阀口进越小，则系统速度刚度进越高；反之，若节流阀开口面积越大，则进越低。
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、当升降货梯负载不变时，低速下的速度刚度好，当负载变化时，负载小时的速度刚度好。
When constant load cargo lifter, low speed speed stiffness, when the load changes, load hour speed stiffness.

3、提高升降货梯http://www.jntr168.com/供油压力加大液压缸有效作用面积，可提高速度刚度。
Increasing pressure to improve cargo lifter oil hydraulic cylinder effective action area, the speed can be increased stiffness.