Hydraulic control valve and variable displacement hydraulic pump with hydraulic control valve
A hydraulic control valve and valve body technology, which is applied in pump control, variable capacity pump components, liquid variable capacity machinery, etc., can solve problems such as slow response and large overshoot of the valve core, and achieve the effect of improving performance
Pending Publication Date: 2021-10-22
DANFOSS POWER SYSTEMS (ZHEJIANG) CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the response of the current hydraulic control valve is slow, and the spool tends to have a large overshoot during the adjustment process
Method used
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Effect test
Embodiment Construction
[0027] see Figure 1 to Figure 6 , Figures 9 to 11 , the hydraulic control valve 100 according to the embodiment of the present invention includes a valve body 10 and a valve core 20 . The valve body 10 includes: a valve cavity 11 extending in the axial direction in the valve body 10; a first cavity formed in the valve body 10 and communicating with the valve cavity 11 at one side in the axial direction of the valve cavity 101 ; an input channel 3 for inputting fluid; and a plurality of output ports 41 , 42 for outputting control fluid, the plurality of output ports 41 , 42 including a first output port 41 and a second output port 42 . The valve core 20 is disposed in the valve cavity 11 of the valve body 10 . Such as figure 1 , 3 , 4, 6, 9-11, the input channel 3 communicates with the first chamber 101, or as figure 2 , 5 As shown, the separate actuation fluid channel 6 for inputting actuation fluid communicates with the first cavity 101 . see Figure 9 to Figure 11...
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The embodiment of the invention discloses a hydraulic control valve and a displacement hydraulic pump. The hydraulic control valve comprises a valve body and a valve element. The valve body comprises a first cavity, a first output port and a second output port, wherein the first cavity is formed in the valve body on one side in the axial direction of a valve cavity and communicates with the valve cavity, and the first output port and the second output port are used for outputting control fluid. The valve element can be located at a first position relative to the valve body, the valve element moves to a second position from the first position through first pressure of the first cavity, and the valve element moves to a third position from the second position through second pressure, larger than the first pressure, of the first cavity. Under the condition that the valve element is located at the first position, an input channel is disconnected with the output ports; under the condition that the valve element is located at the second position, the input channel communicates with the first output port and is disconnected with the second output port; and under the condition that the valve element is located at the third position, in the state of keeping the input channel communicating with the first output port, the input channel communicates with the second output port. The hydraulic control valve can realize a low overshoot function.
Description
technical field [0001] Embodiments of the present invention relate to a hydraulic control valve and a variable displacement hydraulic pump having the hydraulic control valve. Background technique [0002] Usually, the flow rate of the variable displacement hydraulic pump is controlled by the hydraulic control valve of the variable displacement hydraulic pump. However, the response of the current hydraulic control valve is slow, and the spool tends to produce a large overshoot during the adjustment process. Contents of the invention [0003] An object of an embodiment of the present invention is to provide a hydraulic control valve and a variable displacement hydraulic pump having the hydraulic control valve, whereby, for example, the performance of the hydraulic control valve and the variable displacement hydraulic pump can be improved. [0004] An embodiment of the present invention provides a hydraulic control valve, including: a valve body, the valve body includes: a v...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F15B13/02F15B11/08F16K11/065F04B13/00F04B53/10F04B49/22
CPCF15B13/021F15B11/08F16K11/065F04B13/00F04B53/10F04B49/225
Inventor 郑鑫王立娟金晖范腾涛
Owner DANFOSS POWER SYSTEMS (ZHEJIANG) CO LTD