The invention discloses a cocurrent flow control system, a cocurrent flow control method and a crane and relates to the field of engineering machinery. By virtue of utilizing control logic based on an electromagnetic valve, a pilot operated directional control valve and a shuttle valve, automatic control and manual control for the coccurent flow of two dumps can be realized, and the operation rapidness and operation reliability of the crane are improved; during composite action, when the load pressure difference is increased to a certain extent, a dual-pump cocurrent flow state is automatically switched to a dual-pump independent oil supply non-coccurent flow state, performances are not mutually influenced and the composite action effect is improved; by the using of a dual-pump coccurent flow manual control mechanism, independent operations of the two pumps can be realized according to demands of actual working conditions, for instance, single-pump operation is realized when operations such as hoisting jiggle, amplitude variation decrease, and arm stretching and contraction are performed, so that the jiggle property is improved and the energy consumption is reduced.
Cocurrent flow control system, cocurrent flow control method and crane
2015-04-29
Patent
Electronic Resource
English
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