XCMG graders
Brand: XCMG
Model :GR180
Manufacture date: May 2010
Engine: Shangchai
Traveling System
The traveling drive system of this machine adopts the left and right independent full-hydraulic drives, with the paving speed continuously adjustable within 0~20m/min and the running speed continuously adjustable within 0~3km/h. The computer constant-speed automatic control technology is applied for the traveling drive control of this machine to, by means of closed-loop control, accurately control the paving speed regardless of the influence of external load variation and maintain the constant working speed within 0.5% accuracy error. In addition, the computer control system can accurately control the speeds of the tracks on two sides to guarantee the linear driving performance and steering smoothness. Therefore, the traveling drive performance of this machine can completely meet the construction needs.
To guarantee the paving speeds consistent with the working parameters before and after the stop of the paver, a master switch is designed for this product. At the stop and startup of the paver, only the operations of master switch are required to realize the changeover and it’s unnecessary to reset the switch buttons, including traveling speed, material conveyance/distribution, tamper, and automatic leveling, to ensure the consistency of working parameters before and after the stop of machine. This function is really important for the paving operations of roads.
This machine features high adhesion to effectively prevent the slip of tracks under severe working conditions.
Conveying system
Drive mode
It’s applied with left and right independent drives and open-type hydraulic system, namely hydraulic pump - control valve - motor - chain drive - conveyance drive mechanism. The automatic control can be realized directly by ultrasonic level sensor.
Control mode
The conveyance function is controlled by the conveyance switch on the control console or remote control box (Installed on two ends of screed). There are two control modes on the conveyance speed. One is the manual control realized by the manual conveyance switch installed on the control console. The other is the full-automatic level control by angle sensor.
Distribution System
Drive mode
The independent hydraulic drive technology, namely variable displacement plunger pump - cycloidal motor - planetary reducer - chain drive distribution box - distribution worm, is applied for the left and right distribution drives. The whole drive system features the advantages of high efficiency, high drive power, simple and reliable system, and no mutual interference.
Control mode
There are two control modes, namely manual control and automatic control, for the distribution drive. The manual control is mainly operated by the display interface on the control console. The distribution speed is controlled by adjusting the speed percentage parameter to change the output flow of pump. The automatic control utilizes the ultrasonic level sensor and electronic control system to automatically adjust the speed of distribution rod based on the material level signal acquired by the level sensor to realize the full-automatic proportional material supply, adapt the supply speed to paving rate (namely maintaining the constant height of mixture in front of the screed), and meet the best compacting and best evenness requirements. On the other hand, the continuous distribution prevents the peak load of drive system. The start and stop of the distribution drive can also be controlled by the remote control boxes installed on two ends of screed.
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