What kind of bodies are tower cranes made of?
Tower crane is composed of three parts: working mechanism, metal structure and power unit, and control system. The composition and function of the three parts are outlined below.
First, the working mechanism of tower cranesThe working mechanism of tower crane is usually composed of lifting mechanism, luffing mechanism, slewing mechanism, hydraulic jacking mechanism and running mechanism.The hoisting mechanism to realize heavy vertical up and down movement; luffing mechanism and slewing mechanism to achieve weight moving in two horizontal directions; hydraulic lifting mechanism of standard section, increase or decrease, so as to increase or decrease the tower; range of weights can achieve walking mechanism in tower crane and force of arbitrary space motion.
Two. The metal structure of tower craneThe metal structure of tower crane is mainly composed of underframe, tower body, jacket, upper and lower support, suspension arm, balance arm, tower top and other main components.Metal structure is the framework of tower crane, which bears the deadweight of crane and all kinds of external loads during operation.Three. Power unit and control systemThe power unit is the power source of the crane, and the power source of the tower crane is an electric motor with an external power supply.The control system includes controls and safety devices. Control device for tower crane is composed of a linkage control console, distribution box, resistor box components, the safety device is mainly composed of height limiter, amplitude limiter, lifting weight limiter, moment limiter, slewing limiter etc..Through the control system, the movement characteristic of the crane can be changed, so as to realize the starting, speed regulation, modification, braking and stopping of each mechanism, so as to achieve various actions required by the crane operation.
