Crane Sprares and Accessory Close l-3 fire. Its three pairs of contacts at the same time closed, you can work properly. When the shovel needs to turn, the combination switch 3ffK l connected, 3 tired -2 disconnect, 32c action, so that the rotary motor 3Dl, 3D2 access power. In order to prevent the normal operation of the transformation work, there is no voltage relay in the main circuit protection link. Normal operation, the voltage relay device 311J pull, the moving contact closed, through the 3zc contact to the touch device 32c power supply.
Crane Sprares and Accessory 3yJ release voltage is very low [10v or so) calendar to the normal operation when the switch switch 3 hit X-, touch device 3zC still through the contact 3yJ and suction table. Therefore, F can turn to walk operations. The turn job continues. Only when the rotation is stopped. Can be transformed into walking operations. When you need to go to the walking operation, the price of the sander to switch the switch to the trigger. At this time, 3HK-s is closed, and the contact devices 4zcL and 42c2 are energized, and the running motor 4D is connected to the main circuit. Since the voltage output from the rotary generator 3F is much higher than the operating voltage of the traveling motor, the resistors 4R and 4Rc are connected in series to the given signal circuit through the normally closed contact 4zc2, and the given signal current is reduced to 50% of the time.
Crane Sprares and Accessory When the shovel needs to climb, if the motor output is insufficient, you can press the "stiffening" button J4, so that the walking motor he excited winding loop contact / 4-1 closed, 3sv rectified after the insertion potential string into 220v DC circuit, so that the motor running strong magnetic running. The J4-2 is closed and the resistor 4R3 is shorted to increase the current of the given signal to increase the rotor voltage of the rotor, thus increasing the torque and speed of the travel motor.
Cranes mainly include hoisting mechanism, operating mechanism, luffing mechanism, rotary mechanism and metal structure.
Lifting mechanism is the basic working mechanism of the crane, mostly by the hanging system and winch, but also through the hydraulic system lifting heavy objects.
Crane Sprares and Accessory The operating mechanism is used to vertically transport the weight or adjust the working position of the crane, usually consisting of an electric motor, a gear unit, a brake and a wheel.
The luffing mechanism is only equipped with a boom-type crane, the boom is reduced when the amplitude is raised, the amplitude increases, the sub-equilibrium amplitude and the unbalanced amplitude are two.
The rotary mechanism is used to rotate the boom by the drive means and the rotary support means.
Metal structure is the skeleton of the crane, the main bearing parts such as bridge, boom and mast for the box structure or truss structure, but also for the web structure, and some available steel as a support beam.