对于称重量较大的升降货梯http://www.jntr168.com/的液压系统中要使两个或两个以上的液压缸，在运动中保持相同位移或相同速度的回路称为同步回路。在一泵多缸的系统中，尽管液压缸的有效工作面积相等，但是由于运动中所受负载不均衡，升降货梯摩擦阻力也不相等，泄漏量的不同以及制造上的误差等，不能使液压缸同步动作。加装同步回油阀的作用就是为了克服这些影响，补偿它们在流量上所造成的变化。 升降货梯在使用中主要靠系统支持，尤其是升降机的液压系统十分重要，贯穿着使用的整个过程，那么同步回路又有着怎样的定义呢?
Said hydraulic system for greater weight of cargo lifter to make two or more cylinders, displacement remains the same or the same speed in the movement called synchronization loop circuit. In a multi-cylinder pump system, although the effective working area of the cylinder are equal, but suffered due to the movement of the load imbalance, cargo lifter friction is not the same, different and other manufacturing error on the amount of leakage, can not make hydraulic cylinder synchronous action. Synchronization return valve installation role is to overcome these effects, compensate them on the flow caused by changes. Cargo lifter in use, mainly by system support, especially a hydraulic lift system is important, throughout the entire process is used, it has a kind of synchronization loop definition?

升降货梯串联液压缸的同步回路。第一个液压缸回油腔排出的油液，被送入第二个液压缸的进油腔。如果串联油腔活塞的有效面积相等，便可实现同步运动，这种回路两缸能承受不同的负载，但升降货梯泵的供油压力要大于两缸工作压力之和。
Cargo lifter series hydraulic cylinder synchronization circuit. The first hydraulic cylinder oil return drained fluid chamber is fed into the second hydraulic cylinder into the oil chamber. If the effective area of the oil chamber piston series of equal, you can synchronize the movement, this circuit two cylinders can withstand different loads, but cargo lift pump supply pressure is greater than the sum of the two-cylinder operating pressure.

由于升降货梯http://www.jntr168.com/泄漏和制造误差，影响了串联液压缸的同步精度，当活塞往复多次后，会产生严重的失调现象，为此要采取补偿措施。是两个单作用缸串联，并带有补偿装置的同步回路。
Since cargo lifter leak and manufacturing errors, affecting the serial hydraulic cylinder synchronization accuracy, when reciprocating times, will have serious imbalances, compensatory measures to be taken to this end. Two single-acting cylinder is connected in series with a synchronization loop compensation device.