Integrated electro-hydraulic proportional control system
A proportional control, integrated electro-hydraulic technology, used in lifting devices, fluid pressure actuation devices, fluid steering mechanisms, etc., can solve problems such as high failure rate and poor reliability, and achieve strong anti-interference ability, stable performance, and easy closed-loop control effect
Active Publication Date: 2016-02-10
安徽乐冠智能科技有限公司
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AI Technical Summary
Problems solved by technology
The ambient temperature of the traditional electro-hydraulic proportional control multi-way reversing valve cannot exceed 80°C, while the temperature of the forklift hydraulic oil often exceeds 80°C. Due to the limitation of electromagnetic characteristics of the multi-way reversing valve, this has caused defects such as high failure rate and poor reliability in actual use.
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[0028] See attached figure 1 ~ attached Image 6 , an integrated electro-hydraulic proportional control system, which includes a manual operating device, a control circuit and a hydraulic system; the manual operating device includes a joystick 1 and a base 2, and the lower end of the joystick 1 is inserted into the base 2, so A handle swivel 3 is provided above the base 2, and a permanent magnet steel block 4 and a Hall sensor 5 are arranged inside the handle swivel 3; the permanent magnet steel block 4 is arranged on the handle swivel 3 , the Hall sensor 5 is arranged on the joystick 1;
[0029] The control circuit includes an intelligent controller U1 and a motor drive circuit; the motor drive circuit includes a first motor drive circuit and a second motor drive circuit;
[0030] The first motor drive circuit includes a first stepper motor control chip U2 and a first stepper motor drive chip U3; the second motor drive circuit includes a second stepper motor control chip U4...
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The invention discloses a novel integrated electro-hydraulic proportional control system which comprises a manual operation device, a control circuit and a hydraulic system. The manual operation device comprises a control handle and a base, the lower end of the control handle is inserted into the base, a rotary handle sleeve is arranged above the base, and a permanent magnet steel block and a Hall sensor are arranged in the rotary handle sleeve; the control circuit comprises an intelligent controller U1 and two motor drive circuits; the hydraulic system comprises an oil pump, a multiple directional control valve, a tilt speed regulating valve, a lifting speed regulating valve, a tilt hydraulic cylinder and a lifting hydraulic cylinder; the oil pump is connected with the multiple directional control valve which comprises four output ports; the multiple directional control valve is connected with the tilt speed regulating valve and the lifting speed regulating valve through the output ports. The novel integrated electro-hydraulic proportional control system has the advantages that operation requirements of engineering machinery, special purpose vehicles and the like can be met, environmental temperature can reach 120DEG C, labor intensity of operation personnel can be lowered, working efficiency and reliability can be improved, and the like.
Description
technical field [0001] The invention relates to an integrated electro-hydraulic proportional control system, in particular to an integrated electro-hydraulic proportional control system for engineering machinery and special vehicles such as forklifts. Background technique [0002] The multi-way reversing valve of the hydraulic system of the hydraulic forklift adopts a two-way self-holding electromagnet and adopts a double-coil structure. performance permanent magnet. When the coil is energized, the shaft core produces an axial displacement. After the power is turned off, under the action of the closed magnetic field of the permanent magnet, the position of the shaft core after the power-on displacement can be maintained (self-locking), without the need for power input to maintain. Attraction and reset are driven by pulse power. It has the advantages of low power consumption, small temperature rise, and high power. The product is divided into one-way self-holding and two-w...
Claims
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IPC IPC(8): B66F9/22B62D5/06F15B11/00
Inventor 许国仁钱朝昆
Owner 安徽乐冠智能科技有限公司