Shunting motor speed change synchronizing system resisting time-varying large eccentric load and working method

Abstract

The invention discloses a shunting motor speed change synchronizing system resisting the time-varying large eccentric load and belongs to the field of hydraulic synchronous control. The system comprises a load sensing variable pump, a proportional direction valve, shunting motors, a pressure compensating valve, a reversing valve and an execution element which are connected sequentially. The shunting motors are arranged in a multi-line manner. An oil outlet of each line of shunting motor is connected with an executor branch. Speed change synchronous driving of multiple hydraulic executors is achieved. The invention further discloses a working method of the speed change synchronizing system. By means of the four links of speed changing, shunting, pressure compensating and load sensing, high-precision and high-efficiency speed change synchronous driving control under the working circumstances of the large eccentric load or the time-varying load can be achieved, the system is simple in structure, high in reliability and particularly applicable to synchronous driving in a severe environment, the influence on the shunting precision from the eccentric load can be eliminated thoroughly, and the interference of the time-varying load can be resisted.

Description

technical field [0001] The invention relates to a variable speed synchronization system and a working method of a shunt motor, and is especially suitable for a variable speed synchronous system and a working method of a shunt motor resistant to time-varying and large partial loads, and belongs to the field of hydraulic synchronous control. Background technique [0002] The heavy load of heavy equipment requires multiple hydraulic actuators to be driven synchronously. The shunt motor is composed of several hydraulic motors with high machining accuracy and the same size connected by rigid shafts, which can realize the synchronous action of up to 12 hydraulic actuators. Compared with the shunt valve, the shunt error of the current shunt motor is smaller, and its shunt error is 1%-3%. However, the shunt motor's ability to resist partial load is not strong, and its shunt error will further increase when the load deviation between branches increases. For example, the shunt error...

AI Technical Summary

Problems solved by technology

It can be seen that at present, it is still difficult for shunt motors to obtain high-precision synchronous control under the condition of time-varying and large unbalanced loads.

In addition, the synchronous speed of the current shunt motor synchronous system cannot be adjusted, resulting in a large impact on the start-up braking pressure, which is difficult to use for fine work, and the system generally uses a quantitative pump to supply oil, so overflow loss is inevitable, causing the system to heat up and endanger the life of the system

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