1．回转制动原理液压挖掘机回转制动通常有液压制动和机械制动两种型式。（1）液压制动回转马达从运动状态到停止，是操纵换向阀回中位、切断液压马达进回汕路的结果。但转台的转动惯量将驱使马达继续转动，马达高压腔的油经溢流阀回油箱，低压腔则从补油阀补油，转台的动能很 1. Rotary Braking Principle Hydraulic excavator rotary brakes usually have two types of hydraulic brakes and mechanical brakes. (1) Hydraulic brake The slewing motor moves from the moving state to the stop, which is the result of operating the reversing valve back to the neutral position and shutting off the hydraulic motor back to the bypass path. However, the rotational inertia of the turntable will drive the motor to continue to rotate. The oil in the high pressure chamber of the motor is returned to the oil tank via the overflow valve, and the low pressure chamber is filled with oil from the charge valve. The kinetic energy of the turntable is very high.