Variable pump flow control system, control method and main arm oil cylinder control system
A technology of flow control and control method, which is applied in fluid pressure actuators, servo motors, servo meter circuits, etc., can solve problems such as output flow jitter, and achieve the effects of reducing output flow fluctuations, avoiding jitter, and preventing jitter phenomena
Pending Publication Date: 2022-02-11
HUNAN SINOBOOM HEAVY IND
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Problems solved by technology
For this reason, the present invention proposes a variable pump flow control system, which solves the problem of output flow jitter when the variable pump starts
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[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0040] In the description of the present invention, if there are descriptions of first, second, third, fourth, etc., it is only for the purpose of distinguishing technical features, and it cannot be understood as indicating or implying relative importance or implicitly indicating the indicated The number of technical features or implicitly indicates the sequence of the indicated technical features.
[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting and connecting should be unders...
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The invention discloses a variable pump flow control system and method and a main arm oil cylinder control system.The variable pump flow control system comprises a proportional valve, wherein an oil inlet of the proportional valve is used for being connected with an oil outlet of a variable pump, and the oil outlet of the proportional valve is connected with the oil pressure feedback end of the variable pump; a first reversing valve, wherein a first oil port of the first reversing valve is connected with an oil outlet of the proportional valve, a second oil port and a third oil port are used for adjusting the operation state of the main arm telescopic oil cylinder, and a fourth oil port is used for being connected with a main oil tank; a flow valve, wherein a first oil port of the flow valve is connected with an oil outlet of the proportional valve; and a stop valve connected between the second oil port of the flow valve and the fourth oil port of the first reversing valve. According to the invention, the variable pump can normally drive the main arm telescopic oil cylinder to control; by means of the stop valve, the flow valve can be stopped from leaking oil to the main oil cylinder in the starting stage of the variable pump, so that the oil pressure feedback end of the variable pump can obtain accurate oil pressure, it is guaranteed that the variable pump can correctly adjust the output flow, and fluctuation of the output flow is prevented.
Description
technical field [0001] The invention belongs to the field of engineering equipment, and in particular relates to a variable pump flow control system, a control method and a main arm oil cylinder control system. Background technique [0002] When it is necessary to operate the main arm for telescopic movement, it is necessary to start the variable pump to output hydraulic oil to drive the main arm telescopic cylinder to work. However, when the variable pump is just started, it cannot immediately push the piston rod of the main arm telescopic cylinder to move, but With the gradual increase of the driving force to the telescopic oil cylinder of the main arm, the piston rod can finally be pushed to move. During this process, the traditional hydraulic control system cannot well feed back the pressure to the oil pressure feedback end of the variable pump, which will cause the output flow of the variable pump to fluctuate, resulting in the boom when the boom is extended and retract...
Claims
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IPC IPC(8): F15B11/08F15B13/04F15B13/16
CPCF15B11/08F15B13/0401F15B13/16F15B2211/20538F15B2211/405
Inventor 刘国良石伟赵俊波
Owner HUNAN SINOBOOM HEAVY IND