Forklift hydraulic system with throttling and speed regulating circuit of bypass oil passage
A throttling speed regulation, hydraulic system technology, applied in the direction of the lifting device, can solve the problems of easy heat generation, large power loss of the circuit system, etc., achieve good effect, reduce heat generation, and simple structure
Active Publication Date: 2017-02-15
ANHUI HELI CO LTD
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Problems solved by technology
Therefore, this kind of loop system has a large power loss and is prone to heat
Method used
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[0013] Below in conjunction with the accompanying drawings, the present invention will be further described through embodiments.
[0014] see figure 1 and figure 2 , The hydraulic system of the forklift truck with the bypass oil circuit throttling speed control circuit includes a working oil cylinder 1 and a multi-way reversing valve plate 2. The multi-way reversing valve plate 2 includes a multi-way reversing valve 4 and a relief valve 3 . The multi-way reversing valve 4 is a three-position six-way reversing valve, and its first oil inlet C and second oil inlet D communicate with the oil inlet P of the multi-way reversing valve plate 2 through a three-way pipeline. The second oil supply port D is provided with an inlet check valve; the inlet of the relief valve 3 is connected to the oil inlet P of the multi-way reversing valve plate 2, and the outlet of the relief valve 3 is connected to the oil return passage 7; The first oil return port E of the reversing valve 4 is con...
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The invention relates to a forklift hydraulic system with a bypass oil way throttling speed regulation loop. The forklift hydraulic system comprises a working oil cylinder and a multiple directional control valve plate. The multiple directional control valve plate comprises a multiple directional control valve and an overflow valve. When the multiple directional control valve is located at the reversing position, the bypass oil way is arranged between a first oil inlet C and a second oil returning opening F of the multiple directional control valve and is a throttling oil way. According to the forklift hydraulic system, the bypass throttling oil way is arranged in the multiple directional control valve, the flow of oil entering the working oil cylinder is adjusted, redundant oil of the system is prevented from being overflowed back to a hydraulic oil tank in a high-pressure mode through the overflowing valve, generated heat of the system is reduced, and the forklift hydraulic system is simple in structure and good in effect; the bypass throttling oil way is arranged in the multiple directional control valve, the movement speed of the oil cylinder is adjusted, the structure is compact, and cost is low.
Description
technical field [0001] The invention belongs to the technical field of forklifts, and in particular relates to a forklift hydraulic system. Background technique [0002] At present, most of the domestic forklifts below 25T use a quantitative pump hydraulic system, and the flow rate of the system is generally determined according to the flow requirements required for the gantry to rise. When the gantry is tilted or attached, the required flow is only 30% to 50% of the maximum flow due to the speed of the working cylinder. This produces a large energy loss, causes the system to heat up, and affects the normal operation of the system. figure 2 It is the hydraulic principle diagram of the inclined or attached oil circuit of the common forklift gantry. It is composed of the working cylinder 1 and the multi-way reversing valve plate 2. When the valve stem is in the neutral position, P to T are connected, and the reversing is doesn't work. When the valve stem is in the reversing...
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IPC IPC(8): B66F9/22
Inventor 温跃清陈捷余建福袁正李戈操陈秀云徐家祥
Owner ANHUI HELI CO LTD