Beijing North Zhongyi Heavy Machinery Co., Ltd. : Safety of crane speed limit (7)
Description：2. Speed LimitDue to the truck crane lifting, boom telescopic, boom amplitude of the long stroke, th....
2. Speed Limit
Due to the truck crane lifting, boom telescopic, boom amplitude of the long stroke, the mechanism or load in the process of the acceleration caused by gravity is also a more prominent problem. The truck crane speed limit usually adopts the following two methods.
(1) balance valve in series in the oil return circuit
Balancing valve functions not only to lock, but also to limit speed. When the mechanism or load drops, the order valve in the balance valve can make use of the balance of the valve core, so that the hydraulic cylinder (hydraulic motor) return oil flow to maintain a stable state, so that the hydraulic cylinder (hydraulic motor) to maintain the uniform speed of movement.
This article is organized by Beijing North Zhongyi Heavy Machinery Co., Ltd
