Control Modules and Hydraulics
A control module and hydraulic system technology, applied in the hydraulic field, can solve the problems of small impact force, poor impact, and feel of impact control, and achieve the effects of stepless displacement change, convenient operation, and improved response speed.
Active Publication Date: 2022-06-17
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the problems existing in the prior art that when using the prior art to control the high-speed operation of the motor, there are fewer conversion speeds, a sudden change in the displacement of the motor will have an impact on the motor and the hoisting mechanism, and the problem of poor control feeling is provided. A control module, the control module has stepless speed change, good control feeling, small impact force and safer
Method used
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[0022] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.
[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
[0024] In order to achieve the above purpose, such as figure 1 As shown, one aspect of the present invention provides a control module, the control module includes: a first control valve 1, a control unit 2; the first control valve 1 includes a first control end 11 and a second control end 12, with Port a and port b are used to deliver pressure oil to drive the variable motor 9 to rotate; the control unit 2 includes a1 port and b1 port communicated with the first control end 11 for communicating with the c1 port of the var...
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The invention relates to the field of hydraulic technology, and discloses a control module and a hydraulic system. The control module includes: ports a and b with a first control end and a second control end, used to deliver pressure oil to drive a variable motor to change direction A first control valve having a port, and having a first oil input port and a second input oil port communicated with the first control port, selectively communicating with one of the first oil input port and the second input oil port The high pressure is used to communicate with the control unit of the first output oil port of the variable motor, the cracking pressure of the first output oil port is greater than the cracking pressure of the first input oil port or the second input oil port; The output pressure of a control valve is capable of varying linearly with the higher of a control force acting on said first control port or said second control port. The control module of the invention can effectively protect the variable motor, and at the same time improves the response speed of the variable displacement, and achieves stepless variation of the displacement of the variable motor, and is convenient to operate.
Description
technical field [0001] The present invention relates to the field of hydraulic technology, in particular to a control module and a hydraulic system. Background technique [0002] At present, when the hydraulic pilot proportional control system is used to control the lifting and lowering of the crane, the reversing of the main valve spool is completed by manipulating the reversing handle, so that the motor rotates in different directions to realize the lifting or lowering of the hoisting mechanism of the crane; in order to To improve work efficiency, when descending, high speed is usually used. In order to achieve the switch between low speed and high speed of the hoisting mechanism of the crane, the control oil source enters the variable oil cylinder by manipulating the solenoid valve, so that the motor works at a small displacement and the motor enters high speed. Rotation state; or make the control oil source flow out of the variable oil cylinder to restore the motor to a ...
Claims
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IPC IPC(8): F15B21/08F15B11/10F15B13/04B66C13/20
CPCF15B21/087F15B11/10F15B13/0401B66C13/20
Inventor 刘园张玉柱沈昌武
Owner ZOOMLION HEAVY IND CO LTD