先导油控制的卸荷阀实现了在装载机铲掘作业时将转向泵来油直接低压卸荷回油，提高了装载机的牵引力，手机：同时又能满足铲掘松土等作业时动臂快速提升的要求。
4．通过卸荷阀的直接回油，降低了系统的发热，改善了系统的热平衡，提高了系统的可靠性
联系人：蔡韵
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