High-speed switch pilot proportioning valve
A high-speed switching valve, high-speed switching technology, applied in multi-port valves, valve devices, fluid pressure actuating devices, etc., can solve the problems of low pressure level and small flow, reduce sensitivity, facilitate replacement, and reduce costs Effect
Active Publication Date: 2016-05-04
ZHEJIANG UNIV
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Problems solved by technology
In addition, the current research on high-speed switching valves has the problem of low pressure level and relatively small flow rate.
Method used
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[0020] The present invention will be further described below in conjunction with drawings and embodiments.
[0021] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, the present invention includes a main valve body 1, a pilot valve body 2, a first high-speed on-off valve 3, a second high-speed on-off valve 4, a main spool threaded plug 5, a main spool 6, and a main spool displacement sensor 7 , return spring retaining ring 8, first return spring 9, second return spring 10;
[0022] There is a spool hole 1-1 in the center of the main valve body 1; a threaded hole is opened on one side of the spool hole 1-1, and the main spool is installed sequentially from one side of the threaded hole to the spool hole 1-1 on the other side The threaded plug 5, the main valve core 6, facing the outside of the small end of the main valve core 6 on the other side, are sequentially equipped with a return spring retaining ring 8, a second return spring 10, and a first return spring...
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The invention discloses a high-speed switch pilot proportioning valve. A valve element hole and a threaded hole are formed in a main valve body. A main valve element threaded plug, a main valve element, a reset spring check ring, a second reset spring, a first reset spring and a main valve element displacement sensor are sequentially installed. An oil inlet, working oil ports and an oil return port are formed in the bottom of the main valve body and are perpendicular to the valve element hole. A first pressure control cavity and a second pressure control cavity are formed in the two sides of the valve element hole. A pilot valve body is installed on one side of the main valve body. A first high-speed switch valve and a second high-speed switch valve are installed in parallel. The working oil ports of the two high-speed switch valves communicate with the first pressure control cavity and the second pressure control cavity through a first pilot working oil port and a second pilot working oil port respectively. According to the high-speed switch pilot proportioning valve, the two high-speed switch valves serve as a pilot, the position of the main valve element is fed back in real time through the main valve element displacement sensor, and the duty ratio of pulse-width modulation (PWM) signals of the two high-speed switch pilot valves is adjusted through a controller, so that the main valve outputs continuous and controllable pressure flow.
Description
technical field [0001] The invention relates to an electro-hydraulic conversion control element, in particular to a high-speed switch pilot proportional valve. Background technique [0002] The high-speed on-off valve is an ideal method to realize high-speed and high-precision control of the hydraulic system. Under the fully open or fully closed working state, the pressure loss is small, the energy consumption is low, and it is not sensitive to oil pollution. Compared with the traditional servo proportional valve, the high-speed switching valve can directly convert the ON / OFF digital signal into a flow signal, so that the digital signal can be directly combined with the hydraulic system without D / A conversion. However, there are still many problems to be solved to directly apply high-speed switching valves to the industrial world. When the high-speed switching valve is opened and closed, it will cause pressure spikes and flow pulsations to the system. The movement of the a...
Claims
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IPC IPC(8): F15B13/02F16K11/07
CPCF15B13/02F16K11/07
Inventor 杨华勇王双张斌钟麒
Owner ZHEJIANG UNIV