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SS2000型压裂车为载重汽车底盘改装的天然气开采专用设备,其上车安装1台独立的CAT-3512B型大功率柴油机,用于为天然气开采装置提供动力。该柴油机的启动由底盘上的柴油机驱动液压启动马达来完成。1.故障现象起初CAT-3512B型柴油机启动的转速很慢(感觉启动马达无力),随着时间的推移,启动困难越发严重,直至启动马达无法带动柴油机转动。2.工作原理CAT-3512B型柴油机启动液压系统工作原理如附图所示,其主要由液压泵1、溢流阀2、换向阀3、主启动马达4、副启动马达5、球阀(6、7)等组成。底盘柴油机的取力器将动力传至液压泵1。溢
The SS2000 fracturing truck is a natural gas extraction equipment modified for the chassis of a truck. The vehicle is equipped with an independent CAT-3512B high-power diesel engine for powering the natural gas extraction plant. The diesel engine is started by a diesel engine driven hydraulic starter motor on the chassis. 1. Symptom At first CAT-3512B diesel engine started slowly (feeling start motor weakness), with the passage of time, starting more and more serious difficulties until the starter motor can not drive the diesel engine rotation. 2. Working principle CAT-3512B diesel engine starting hydraulic system works as shown in the figure, which mainly consists of hydraulic pump 1, relief valve 2, the valve 3, the main starter motor 4, the Deputy starter motor 5, the ball valve , 7) and other components. The power take-off of the chassis diesel engine transmits power to the hydraulic pump 1. overflow