A rotary valve and rotary hydraulic reversing control system
A technology of rotary valve and hydraulic motor, which is applied in the field of hydraulic control, can solve the problems of adverse impact on the life of key components such as slewing supports, unsatisfactory buffering effect of slewing mechanism, and decreased comfort of equipment operators, so as to reduce noise and vibration and ensure Balanced, improved impact issues
Active Publication Date: 2018-11-09
威海中颐液压科技股份有限公司
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AI Technical Summary
Problems solved by technology
[0003] The rotary reversing valve in the prior art has an unsatisfactory cushioning effect on the slewing mechanism when starting and braking, and there is a problem of large impact, which not only leads to a decrease in the comfort of the equipment operator, but also affects the slewing support of the equipment, etc. Detrimental impact on life of critical components
Method used
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Embodiment Construction
[0025] The present invention will be further described below.
[0026] Such as figure 1 As shown, a rotary valve includes a valve body 1, and the outer surface of the valve body is respectively provided with a first working oil port A1, a second working oil port B1, a third working oil port A2 and a fourth working oil port B2. The interior of the valve body 1 is respectively provided with an A chamber 2 connecting the first working oil port A1 to the third working oil port A2, and a B chamber 4 connecting the second working oil port B1 to the fourth working oil port B2; inside the valve body 1 A first valve chamber 21 and a second valve chamber 25 are respectively provided,
[0027] The first valve chamber 21 and the second valve chamber 25 each have a communication end and a closed end, and the communication ends of the first valve chamber 21 and the second valve chamber 25 respectively pass through the first oil passage provided inside the valve body 1 16 and the third oil...
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The invention provides a rotary valve and a rotary hydraulic reversing control system. According to the rotary valve, two pairs of matched oil ports, a cavity A and a cavity B are formed in a valve body, and the cavity A and the cavity B communicate with the two pairs of oil ports; a first valve cavity and a second valve cavity which communicate with the cavity A and the cavity B through a fifth oil duct and a sixth oil duct correspondingly are further formed in the valve body; annular cavities which communicate with the cavity A and the cavity B through a second oil duct and a fourth oil duct are formed outside one side of the first valve cavity and outside one side of the second valve cavity correspondingly; buffering valve elements and one-way valve bushes are arranged in the first valve cavity and the second valve cavity correspondingly; the first valve cavity and the second valve cavity are connected with the buffering valve elements through springs; one-way valve elements are assembled in the one-way valve bushes; annular notches are formed in the adjacent ends of the buffering valve elements; and the buffering valve elements and the one-way valve elements are connected through second springs. According to the rotary hydraulic reversing control system, a hydraulic motor is connected with an electromagnetic reversing valve through the two pairs of oil ports of the rotary valve. By adoption of the rotary valve and the rotary hydraulic reversing control system, pressure fluctuation in a rotary control loop can be effectively reduced.
Description
technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a rotary valve and a rotary hydraulic reversing control system. Background technique [0002] In order to improve the work efficiency and the mobility of the whole machine, construction machinery is generally equipped with a slewing mechanism. At present, the actions of construction machinery are widely driven by hydraulic pressure. As one of the important mechanisms, the slewing mechanism has the characteristics of large moment of inertia and large load fluctuations during operation. Moreover, the slewing mechanism starts and brakes frequently, and the working conditions are harsh. Therefore, the slewing control circuit There are high requirements for safety and reliability to ensure good smooth performance during the slewing process. When starting, the slewing mechanism is required to be able to start smoothly, and there should be no large pressure shock. When braki...
Claims
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IPC IPC(8): F16K11/10F16K15/02F15B21/00E02F9/22B66C13/20
CPCB66C13/20E02F9/2267F15B21/001F15B21/008F16K11/10F16K15/026
Inventor 李建松
Owner 威海中颐液压科技股份有限公司