What is the definition of "field bridge" for port machinery and equipment?

Update:10-04-2018
Summary:

      What is the definition of "field bridge" for port […]

      What is the definition of "field bridge" for port machinery and equipment?The bridge is a popular name in the port industry.zpmc  The exact name is the tire type container gantry crane. The following is the definition of the think tank encyclopedia.


    Tire-type container gantry cranes are special machinery for stacking container cargo. It is composed of a door-shaped bracket, a power transmission system, a lifting mechanism, a vehicle running mechanism, a trolley running mechanism, and a telescopic spreader. The traveling trolley equipped with container spreaders travels along the main beam track to carry out container handling and stacking operations. The tire-type walking mechanism allows the crane to walk on the freight yard and can make a 90-degree right-angle turn to move from one freight yard to another. , Flexible operation.
Tyre type container gantry cranes can be divided into diesel engine-electrical mode and diesel engine-hydraulic mode.


    The diesel engine-electric mode is a diesel engine that drives a DC generator. A DC generator drives a DC motor and then drives each mechanism. In recent years, the use of AC variable frequency speed control system, AC squirrel cage motor drive mode, due to the simple motor, easy maintenance, welcomed by users.

     Diesel-hydraulic mode is driven by diesel engine hydraulic pressure, driven by the hydraulic pump hydraulic motor, and then drive the various agencies, this method has good acceleration performance, power device weight is lighter, but the system is prone to oil leakage, maintenance is more complex and less used.