Beijing North Zhongyi Heavy Machinery Co., Ltd. : Safety of crane speed limit (6)
Description：(4) external brake for lifting hydraulic motorTo make the hydraulic cylinder, hydraulic motor for a ....
(4) external brake for lifting hydraulic motor
To make the hydraulic cylinder, hydraulic motor for a long time does not produce internal leakage is difficult to detect, the leakage will be imperceptibly produced after the sealing wear. In this way, if the lock is firm, there is only one method to install the brake, and it can only be used on the hydraulic motor that makes the lifting weight rise and fall, and other methods, such as the boom expansion and amplitude variation, can not be used.
The brake that plays a role on the lifting mechanism is actually a small single rod single acting hydraulic cylinder, the brake is usually closed, the braking force depends on the spring force in the cylinder. In order to obtain the ideal locking effect, of course, the greater the spring force, the better, but too large spring force will increase the energy consumption of brake loosening, so the external clamped brake is an auxiliary means of its locking scheme.
This article is organized by Beijing North Zhongyi Heavy Machinery Co., Ltd
