Electro-hydraulic control method and system and engineering machinery
An electro-hydraulic control system and electro-hydraulic control technology are applied in the direction of mechanical equipment, fluid pressure actuation system components, servo meter circuits, etc., which can solve the problems of wasting power sources and the inability to play the advantages of motors, so as to avoid the waste of power sources Effect
Pending Publication Date: 2022-05-27
SANY HEAVY MACHINERY
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Problems solved by technology
[0004] The present invention provides an electro-hydraulic control method, system and engineering machinery, which are used to solve the problem that in the prior art, the motor that drives the hydraulic pump is adjusted according to the working conditions and gears, and the advantages of the motor cannot be brought into play, and power is wasted. Based on the defect of the source, realize the adjustment of the motor speed based on the flow demand of the hydraulic pump, so that the motor is in a reasonable working range, reduce energy consumption, and achieve the effect of energy saving
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[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0041] Combine below figure 1 and figure 2 Describe an electro-hydraulic control method of the present invention, the method being performed by an electro-hydraulic control device or a combination of software and / or hardware therein, such as figure 1 As shown, the electro-hydraulic control method includes the following steps:
[0042] 101. Obtain the displacement of the hydraulic pump and the speed of the motor...
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The invention provides an electro-hydraulic control method and system and engineering machinery, and belongs to the technical field of engineering machinery. The control method comprises the steps that the displacement of a hydraulic pump and the rotating speed of a motor are obtained; based on the displacement and the rotating speed, the flow demand quantity of the hydraulic pump is obtained; judging whether the flow quantity demand is smaller than the maximum flow of the hydraulic pump or not; and if yes, based on a preset corresponding relation, a motor set rotating speed matched with the flow demand quantity is obtained, and based on the motor set rotating speed, the rotating speed of the motor is controlled. The invention discloses a hydraulic pump speed regulation device, which is used for overcoming the defects that the advantages of a motor cannot be exerted and a power source is wasted because the speed of the motor for driving a hydraulic pump to act is regulated according to working conditions and gears in the prior art, realizing the regulation of the rotating speed of the motor based on the flow demand of the hydraulic pump, enabling the motor to be in a reasonable working interval, reducing the energy consumption and achieving the energy-saving effect.
Description
technical field [0001] The invention relates to the technical field of construction machinery, in particular to an electro-hydraulic control method, system and construction machinery. Background technique [0002] Today's pure electric drive construction machinery, the general practice is to simply replace the diesel engine with a power motor, and the speed regulation of the motor is basically a simple simulation of the engine's sub-working conditions and speed regulation by gears, so that the motor can be adjusted well. The speed and strong overload capacity cannot be fully exerted. [0003] At the same time, at present, most of the construction machinery that relies on the motor to drive the hydraulic pump action adopts a fixed speed control strategy, which makes the construction machinery neither take advantage of the rapid response of the motor nor reduce the power by changing the speed. Therefore, it is difficult to realize the power source. - The global power matching...
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IPC IPC(8): F15B11/042F15B21/08
CPCF15B11/0423F15B21/085F15B2211/20515F15B2211/20546F15B2211/455
Inventor 张杰
Owner SANY HEAVY MACHINERY