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我公司在香港承包工程中使用了六台西德LIBHERR 154.5HC型塔吊。为了保证塔吊的正常运转,提高工作效率,我们非常注重塔吊日常的检查保养,收到了很好的效果。下面介绍一下塔机的几个主要机构的安全装置及调节。一、起升机构制动器起升机构制动器的主要部件是液压泵总成见图1。液压泵总成包括带有鼠笼式马达的齿轮泵和液压缸。当马达启动后出油阀关闭,液压油通过高压软管到活塞的底部,使得活塞沿液压缸上行。此时起升机构制动。当马达停止,出油阀打开,油排到油箱
Our company has used six West German LIBHERR 154.5HC tower cranes in its Hong Kong contracting project. In order to ensure the normal operation of tower cranes and improve work efficiency, we attach great importance to the daily inspection and maintenance of tower cranes and have received very good results. The following describes the safety mechanisms and adjustments of several major mechanisms of the tower crane. A. Lifting Mechanism Brake Lifting Mechanism The main component of the brake is the hydraulic pump assembly shown in Figure 1. The hydraulic pump assembly includes a gear pump and a hydraulic cylinder with a squirrel cage motor. When the motor starts, the outlet valve closes and the hydraulic oil passes through the high pressure hose to the bottom of the piston, causing the piston to ascend along the cylinder. At this point the lifting mechanism brakes. When the motor stops, the oil valve opens and the oil drains to the tank