CN-122014882-A - Variable-split-ratio split-flow-and-combined-flow distribution valve and control method thereof

CN122014882ACN 122014882 ACN122014882 ACN 122014882ACN-122014882-A

Abstract

A flow dividing and collecting flow distributing valve with a variable flow dividing ratio and a control method thereof comprise a valve body, wherein a first valve sleeve, a second valve sleeve, an oil inlet, a first oil outlet and a second oil outlet are arranged on the valve body, the oil inlet is communicated with the middle part of the first valve sleeve, the first oil outlet and the second oil outlet are respectively communicated with the second valve sleeve, a first throttling opening and a second throttling opening are symmetrically arranged on two sides of a position, which is communicated with the oil inlet, of the first valve sleeve, a first valve core is arranged in the first valve sleeve, one end of the first valve core is provided with a first elastic piece, the other end of the first valve core is provided with a driving piece capable of driving the first valve core to move relative to the first valve sleeve, and a pressure compensating valve core is arranged in the second valve sleeve. Compared with the prior art, the invention realizes the elimination of the flow areas by the linkage of the two throttle openings, thereby realizing different flow dividing ratios under different openings. And secondly, the pressure difference is balanced through the pressure compensation valve core, so that the pressure difference passing through the first throttling orifice and the second throttling orifice is always the same, and the split ratio irrelevant to the load is realized.

Inventors

DU CHANGHUI
YI QING
GUI YONGHENG

Assignees

长沙市伊尔特流体技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260313

Claims (9)

1. The flow dividing and collecting flow distributing valve with the variable dividing ratio comprises a valve body, wherein a first valve sleeve, a second valve sleeve, an oil inlet, a first oil outlet and a second oil outlet are arranged on the valve body, the oil inlet is communicated with the middle part of the first valve sleeve, and the first oil outlet and the second oil outlet are respectively communicated with the second valve sleeve, and the flow dividing and collecting flow distributing valve is characterized in that: a first throttling port and a second throttling port are symmetrically arranged on two sides of the position, communicated with the oil inlet, of the first valve sleeve respectively; the valve comprises a first valve sleeve, a first valve core, a second valve core, a first valve core and a second valve core, wherein the first valve core is arranged in the first valve sleeve, and the diameter of the first valve core is matched with the inner diameter of the first valve sleeve; The first valve core is provided with a first valve body, wherein the first valve body is provided with a first valve core, and the first valve core is provided with a second valve core; The other end of the first valve core is provided with a driving piece which can drive the first valve core to move relative to the first valve sleeve; The middle part of the second valve sleeve is communicated with the middle part of the first valve sleeve, two ends of the second valve sleeve are respectively communicated with the first throttling orifice and the second throttling orifice, two ends of the second valve sleeve are respectively sealed through a first sealing element and a second sealing element, and a pressure compensation valve core is arranged in the second valve sleeve.
2. The variable split ratio flow dividing and collecting flow distributing valve as set forth in claim 1, wherein the first valve core is sealed at both ends by a third sealing member such that two chambers are formed between both ends of the first valve core and the third sealing member, respectively, and the driving member comprises a pilot control valve having a first valve port and a second valve port, respectively communicating with the two chambers.
3. The variable split ratio flow dividing and combining flow distributing valve according to claim 2, wherein the driving piece comprises a displacement sensor and a controller, the displacement sensor is used for acquiring the position of the first valve core, and the controller is respectively in communication connection with the displacement sensor and the pilot control valve.
4. The variable split ratio, flow dividing and combining valve as set forth in claim 1 wherein the drive member comprises a rack and a drive motor, the rack being coupled to the first valve spool, the drive motor being configured to drive the rack to move the first valve spool relative to the first valve sleeve.
5. The variable split flow combining valve of claim 1 wherein the reduced diameter section has a length greater than the distance between the proximal ends of the first and second orifices and less than the distance between the distal ends of the first and second orifices.
6. The variable split flow rate, combined flow distribution valve as set forth in claim 1 wherein the length of the reduced diameter section is less than the distance between the proximal ends of the first orifice and the second orifice, and wedge-shaped holes are provided at both ends of the reduced diameter section, the diameter of the wedge-shaped holes gradually decreasing from the middle to the end of the first valve element.
7. The variable split ratio, flow-dividing and combining flow distribution valve as set forth in any one of claims 1-6, wherein the pressure compensating spool comprises a first pressure compensating spool, a second elastic member, a third elastic member, and a fourth elastic member; One end of the first pressure compensation valve core is provided with a first hook part, one end of the second pressure compensation valve core is provided with a second hook part, and the first hook part and the second hook part are matched with each other so as to connect the first pressure compensation valve core with the second pressure compensation valve core; the second elastic piece is arranged between the first pressure compensation valve core and the second pressure compensation valve core, the third elastic piece is arranged between the first pressure compensation valve core and the first sealing piece, and the fourth elastic piece is arranged between the second pressure compensation valve core and the second sealing piece.
8. The variable split ratio, split stream flow distribution valve as defined in claim 7, wherein: The first valve core is provided with a first valve cavity and a first throttling hole, the first sealing element is provided with a first cavity and a second throttling hole, and the second valve sleeve is provided with a third throttling hole at a position corresponding to the first oil outlet; The second valve sleeve is provided with a second valve cavity and a third orifice, the second sealing piece is provided with a second cavity and a fourth orifice, the second valve sleeve is provided with a fourth orifice at a position corresponding to the second oil outlet, and the second oil outlet is sequentially communicated with the fourth orifice, the third orifice, the second valve cavity, the second cavity, the fourth orifice and the second orifice.
9. A control method of a variable split ratio split-flow distribution valve as claimed in any one of claims 1 to 8, comprising the steps of: determining the target position of the first valve core according to the target split ratio, a relation curve of the split ratio and the position of the first valve core; The control driving piece drives the first valve core to a target position.

Description

Variable-split-ratio split-flow-and-combined-flow distribution valve and control method thereof Technical Field The invention relates to the technical field of valve control, in particular to a variable split ratio split and combined flow distribution valve and a control method thereof. Background In the conventional flow dividing and collecting valve, the combination structure of the fixed throttle 101 and the variable throttle 102 is adopted, as shown in fig. 1, the distribution ratio of the flow dividing or collecting is determined by the size or the number of the fixed throttle 101, and the pressure difference between the front and the rear of the fixed throttle 101 is compensated by the variable throttle 102. Three or more loads are typically split using a combination of two or more split flow valves of fixed split ratio (e.g., 1:1 split or 1:2 split, etc.). However, such a fixed split ratio flow divider/combiner valve has certain limitations in certain applications. For example, as shown in fig. 2, in a closed traveling system controlled by the flow dividing and collecting valves 1, the oil source of one pump 2 is distributed to four motors 3 by three flow dividing and collecting valves 1. When the vehicle turns to the operation, along with turning angle's change, turning radius also changes in real time, because turning radius is different, and the flow of motor demand on inside and outside is also different, and along with turning angle's change also changes in real time, current scheme adopts the reposition of redundant personnel mass flow valve of fixed reposition of redundant personnel ratio and bypass damping's mode, has certain limitation, can cause cross country performance to become poor, the problem that the energy consumption increases. Disclosure of Invention The invention provides the flow distribution valve with the variable flow distribution ratio, so that the technical problem of limited application scene of the existing flow distribution valve with the fixed flow distribution ratio is solved. In order to achieve the above purpose, the present invention adopts the following technical scheme. The flow dividing and collecting flow distributing valve with the variable flow dividing ratio comprises a valve body, wherein a first valve sleeve, a second valve sleeve, an oil inlet, a first oil outlet and a second oil outlet are arranged on the valve body; a first throttling port and a second throttling port are symmetrically arranged on two sides of the position, communicated with the oil inlet, of the first valve sleeve respectively; the valve comprises a first valve sleeve, a first valve core, a second valve core, a first valve core and a second valve core, wherein the first valve core is arranged in the first valve sleeve, and the diameter of the first valve core is matched with the inner diameter of the first valve sleeve; The first valve core is provided with a first valve body, wherein the first valve body is provided with a first valve core, and the first valve core is provided with a second valve core; The other end of the first valve core is provided with a driving piece which can drive the first valve core to move relative to the first valve sleeve; The middle part of the second valve sleeve is communicated with the middle part of the first valve sleeve, two ends of the second valve sleeve are respectively communicated with the first throttling orifice and the second throttling orifice, two ends of the second valve sleeve are respectively sealed through a first sealing element and a second sealing element, and a pressure compensation valve core is arranged in the second valve sleeve. According to the invention, the first throttling orifice and the second throttling orifice are designed into the variable throttling orifice with the flow area controlled by the relative position between the first valve core and the first valve sleeve, the two throttling orifices realize the dissipation of the flow area through linkage, and the different flow dividing ratios under different openings can be realized by adding the pressure compensation function of the pressure compensation valve core, so that the flow dividing ratio can be regulated in real time. The invention provides a specific structure of a driving piece, in some embodiments, two ends of a first valve core are sealed through a third sealing piece, so that two chambers are formed between the two ends of the first valve core and the third sealing piece respectively, the driving piece comprises a pilot control valve, and the pilot control valve is provided with a first valve port and a second valve port which are communicated with the two chambers respectively. In some embodiments, the driving piece comprises a displacement sensor and a controller, wherein the displacement sensor is used for acquiring the position of the first valve core, and the controller is respectively in communication connection with the displacement sensor and the p