Proportional control type power limitation valve
A technology of power limitation and controller, which is applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problems of high cost, complex structure, narrow power limitation range, etc., and achieve high degree of automation and adjustable range Wide, compact effect
Inactive Publication Date: 2013-01-09
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology
The disadvantages of these two power limit methods are: the power limit value can only be adjusted manually and cannot be adjusted continuously in real time automatically, the power limit range is narrow, the structure is complex, and the cost is high. It is not suitable for high-power hydraulic pressure with different power limit values under multiple working conditions. The system cannot guarantee that the system is in the best working condition under multiple working conditions
Most of the current power limiting devices are for one-way variable pumps, but there are fewer power limiting devices for two-way variable pumps in closed hydraulic systems with higher efficiency. , high efficiency, and automation development, the above-mentioned power limitation methods are increasingly unable to meet the needs of the hydraulic system
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Embodiment Construction
[0024] The present invention will be further described in detail below through embodiments in conjunction with the accompanying drawings.
[0025] see figure 1 , according to one embodiment, the proportional control power limiting valve includes a valve main body, a right proportional electromagnet drive module, a controller 19 and a detection unit, the valve main body is configured to have a hydraulic system pressure feedback part and a hydraulic pilot oil control part, the hydraulic pressure The system pressure feedback part drives the hydraulic pilot oil control part to release the hydraulic pilot oil to the outside in response to the overrun of the hydraulic system pressure to reduce the pressure of the hydraulic pilot oil, so that the power of the hydraulic pump is maintained within the limit range. The detection unit is used to detect the hydraulic pressure in real time. The overflow degree of the pilot oil control part, the detection unit is coupled to the input termina...
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The invention discloses a proportional control type power limitation valve which comprises a valve body, a right proportional electromagnet driving module, a controller and a detection unit, wherein the valve body is configured into a hydraulic system pressure feedback part and a hydraulic pilot oil control part; the hydraulic system pressure feedback part responds to the overrun of the hydraulicsystem pressure to drive the hydraulic pilot oil control part to release hydraulic pilot oil to the outside so as to reduce the pressure of the hydraulic pilot oil, so that the power of a hydraulic pump can be kept within a limited range; the detection unit detects the affordable overflow degree of the hydraulic pilot oil control part in real time; the detection unit is coupled to the controller,the controller is coupled to the right proportional electromagnet driving module, and a right proportional electromagnet is coupled to the hydraulic pilot oil control part; and the controller controls the output of the right proportional electromagnet in accordance with externally-supplied power regulation signals and the real-time detection result of the detection unit, so that the hydraulic pilot oil control part can attain the affordable overflow degree adapted to the power regulation signals.
Description
technical field [0001] The invention relates to power regulation and control equipment of a hydraulic system, in particular to a proportional control type power limiting valve. Background technique [0002] During the working process of the hydraulic system, the power of the hydraulic pump will exceed the limit value due to sudden changes in the system load or other reasons. The conventional solution is to set a safety valve at the outlet of the hydraulic pump to prevent the system pressure from being too high, thereby limiting the hydraulic pump. power. When the load mutation causes the system pressure to be too high and the power of the hydraulic pump exceeds the limit value, the safety valve overflows, causing power loss and system efficiency decline. [0003] At present, some hydraulic systems are equipped with conventional mechanical power limiting valves, such as Rexroth's LV06 series power limiting valves, and some hydraulic systems are equipped with mechanical valve...
Claims
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IPC IPC(8): F15B13/02
Inventor 夏必忠冯平法杨华勇汪劲松张辉叶佩青
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV