Flow distributing and collecting flow distributing valve with variable split ratio and control method thereof

Abstract

The invention discloses a flow distributing and collecting flow distributing valve with a variable split ratio and a control method thereof. The flow distributing and collecting flow distributing valve comprises a valve body, and the valve body is provided with a first valve sleeve, a second valve sleeve, an oil inlet, a first oil outlet and a second oil outlet; 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 formed in the two sides of the position, communicated with the oil inlet, of the first valve sleeve correspondingly. A first valve element is arranged in the first valve sleeve, a first elastic piece is arranged at one end of the first valve sleeve, and a driving piece capable of driving the first valve element to move relative to the first valve sleeve is arranged at the other end. And a pressure compensation valve core is arranged in the second valve sleeve. Compared with the prior art, through-flow areas are changed and changed through linkage of the two throttling openings, and therefore different flow dividing proportions under different openings are achieved. And secondly, the pressure difference is balanced through the pressure compensation valve element, so that the pressure difference passing through the first throttling opening and the pressure difference passing through the second throttling opening are always the same, and the split ratio irrelevant to the load is achieved.

Description

Technical Field

[0001] This invention relates to the field of valve control technology, specifically to a flow distribution valve with a variable flow splitting ratio and a flow combining valve and its control method. Background Technology

[0002] Existing flow divider / combiner valves all employ a combination structure of a fixed throttling orifice 101 and a variable throttling port 102, such as... Figure 1 As shown, the distribution ratio of flow splitting or combining is determined by the size or number of fixed throttling orifices 101, and the variable throttling orifice 102 compensates for the pressure difference before and after the fixed throttling orifice 101. Typically, two or more flow splitting and combining valves with fixed splitting ratios (such as 1:1 or 1:2 splitting) are combined to split three or more loads.

[0003] However, this type of fixed split-ratio flow divider / combiner valve has certain limitations in some specific applications. For example, ... Figure 2 As shown, the closed-loop travel system controlled by the flow divider / combiner valve 1 distributes the oil supply from one pump 2 to four motors 3 through three flow divider / combiner valves 1. When the vehicle performs a steering operation, the turning radius changes in real time with the steering angle. Because the turning radius is different, the flow demand of the inner and outer motors is also different, and it changes in real time with the steering angle. The existing solution uses a flow divider / combiner valve with a fixed flow ratio and a bypass damper, which has certain limitations and will cause problems such as deterioration of off-road performance and increased energy consumption. Summary of the Invention

[0004] This invention provides a flow distribution valve with a variable flow split ratio to solve the technical problem that the application scenarios of existing flow split and combine valves with fixed flow split ratios are limited.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A variable flow splitting ratio flow distribution valve includes a valve body, on which a first valve sleeve, a second valve sleeve, an oil inlet, a first oil outlet, and a second oil outlet are provided; the oil inlet is connected to the middle part of the first valve sleeve; the first oil outlet and the second oil outlet are respectively connected to the second valve sleeve.

[0007] The first valve sleeve has a first throttling orifice and a second throttling orifice symmetrically opened on both sides of the oil inlet;

[0008] The first valve sleeve contains a first valve core, the diameter of which matches the inner diameter of the first valve sleeve; the first valve core has a reduced diameter section in the middle.

[0009] One end of the first valve core is provided with a first elastic element; when the first elastic element is in a free state, the flow rates of the first throttling orifice and the second throttling orifice are equal;

[0010] The other end of the first valve core is provided with a driving component that can drive the first valve core to move relative to the first valve sleeve;

[0011] The middle part of the second valve sleeve is connected to the middle part of the first valve sleeve, and the two ends are connected to the first throttling port and the second throttling port respectively; the two ends of the second valve sleeve are sealed by the first sealing element and the second sealing element respectively, and a pressure compensation valve core is provided inside the second valve sleeve.

[0012] This invention designs the first and second throttling orifices as variable throttling orifices whose flow areas can be controlled by the relative position between the first valve core and the first valve sleeve. The two throttling orifices are linked to achieve the increase or decrease of the flow area of ​​one or the other. In addition, with the pressure compensation function of the pressure compensation valve core, different flow splitting ratios can be achieved under different openings, and can be adjusted in real time.

[0013] The present invention provides a specific structure of a driving component. In some embodiments, both ends of the first valve core are sealed by a third sealing element, so that two chambers are formed between the two ends of the first valve core and the third sealing element respectively. The driving component includes a pilot control valve, which has a first valve port and a second valve port, respectively communicating with the two chambers.

[0014] In some embodiments, the drive includes a displacement sensor and a controller; the displacement sensor is used to obtain the position of the first valve core; the controller is communicatively connected to the displacement sensor and the pilot control valve.

[0015] The present invention provides another specific structure of the driving component. In some embodiments, the driving component includes a rack and a drive motor; the rack is connected to a first valve core; the drive motor is used to drive the rack, thereby moving the first valve core relative to the first valve sleeve.

[0016] In some embodiments, the length of the reduced diameter section is greater than the distance between the proximal ends of the first throttling orifice and the second throttling orifice, but less than the distance between the distal ends of the first throttling orifice and the second throttling orifice.

[0017] In some embodiments, the length of the reduced diameter section is less than the distance between the proximal ends of the first throttling orifice and the second throttling orifice; wedge-shaped holes are provided at both ends of the reduced diameter section, and the diameter of the wedge-shaped holes gradually decreases from the middle of the first valve core to the end.

[0018] In some embodiments, the pressure compensation valve core includes a first pressure compensation valve core, a second pressure compensation valve core, a second elastic element, a third elastic element, and a fourth elastic element;

[0019] One end of the first pressure compensation valve core is provided with a first hook, and one end of the second pressure compensation valve core is provided with a second hook. The first hook and the second hook cooperate with each other to connect the first pressure compensation valve core and the second pressure compensation valve core.

[0020] The second elastic element is disposed between the first pressure compensation valve core and the second pressure compensation valve core; the third elastic element is disposed between the first pressure compensation valve core and the first sealing element; and the fourth elastic element is disposed between the second pressure compensation valve core and the second sealing element.

[0021] In some embodiments, the first pressure compensation valve core is provided with a first valve cavity and a first throttling orifice, the first sealing element is provided with a first cavity and a second throttling orifice, and the second valve sleeve is provided with a third throttling orifice at a position corresponding to the first oil outlet; the first oil outlet is sequentially connected to the third throttling orifice, the first throttling orifice, the first valve cavity, the first cavity, the second throttling orifice, and the first throttling orifice.

[0022] The second pressure compensation valve core has a second valve chamber and a third throttling orifice, the second sealing element has a second cavity and a fourth throttling orifice, and the second valve sleeve has a fourth throttling orifice at a position corresponding to the second oil outlet; the second oil outlet is sequentially connected to the fourth throttling orifice, the third throttling orifice, the second valve chamber, the second cavity, the fourth throttling orifice, and the second throttling orifice.

[0023] The present invention balances the pressure difference by using the pressure compensation valve core, so that the pressure difference through the first throttling port and the second throttling port is always the same, thereby achieving a flow split ratio independent of the load.

[0024] Based on the same inventive concept, the present invention also provides a control method for the above-mentioned variable split ratio flow distribution valve, comprising the following steps:

[0025] The target position of the first valve core is determined based on the target flow split ratio and the relationship curve between the flow split ratio and the position of the first valve core.

[0026] The control actuator drives the first valve core to the target position.

[0027] This invention has at least the following technical effects or advantages:

[0028] 1. This invention designs the first and second throttling orifices as variable throttling orifices whose flow area can be controlled by the relative position between the first valve core and the first valve sleeve. The two throttling orifices are linked to achieve the increase or decrease of the flow area of ​​one or the other. In addition, with the pressure compensation function of the pressure compensation valve core, the flow splitting ratio can be different under different openings and can be adjusted in real time.

[0029] 2. This invention uses a pressure compensation valve core to balance the pressure difference, so that the pressure difference through the first throttling port and the second throttling port is always the same, thereby achieving a flow split ratio independent of the load.

[0030] 3. This invention integrates electro-hydraulic proportional control or rack and pinion control, enabling the first valve core to be controlled in real time according to control requirements, thereby realizing real-time changes in the flow ratio and meeting specific flow control needs.

[0031] 4. By using different first valve core design schemes, this invention can achieve different flow gains to meet the corresponding usage requirements. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of an existing flow divider / combiner valve.

[0033] Figure 2 Hydraulic schematic diagram of a closed-loop travel system controlled by an existing flow divider / combiner valve;

[0034] Figure 3 This is a schematic diagram of the variable split ratio flow distribution valve of design scheme one in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the variable split ratio flow distribution valve of design scheme one in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the working state of a variable flow splitting and combining flow distribution valve in one embodiment of the present invention (when the first valve core moves to the left).

[0037] Figure 6 This is a schematic diagram of the working state of a variable flow splitting and combining flow distribution valve in one embodiment of the present invention (when the first valve core moves to the right).

[0038] Figure 7 This is a schematic diagram showing the relationship between the flow rates of the first and second throttling orifices and the position of the first valve core in a design scheme one of the embodiments of the present invention;

[0039] Figure 8 This is a schematic diagram of the variable split ratio flow distribution valve of design scheme two in one embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the structure of the first valve core of design scheme two in one embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram showing the relationship between the flow rates of the first and second throttling orifices and the position of the first valve core in a design scheme two of an embodiment of the present invention. Detailed Implementation

[0042] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0043] Example 1

[0044] See Figure 3 A variable flow splitting ratio flow distribution valve includes a valve body 4, on which a first valve sleeve 51, a second valve sleeve 52, an oil inlet 6, a first oil outlet 71, and a second oil outlet 72 are provided; the oil inlet 6 is connected to the middle part of the first valve sleeve 51; the first oil outlet 71 and the second oil outlet 72 are respectively connected to the second valve sleeve 52.

[0045] The first valve sleeve 51 has symmetrically arranged first throttling orifices 511 and second throttling orifices 512 on both sides of the connection with the oil inlet 6. A first valve core 513 is provided inside the first valve sleeve 51, the diameter of which matches the inner diameter of the first valve sleeve 51; a reduced diameter section 514 is provided in the middle of the first valve core 513. One end of the first elastic member 81 abuts against one end of the first valve core 513, and the other end abuts against the third sealing member 93. Specifically, the first elastic member 81 is sleeved on the first valve core 513, and a gasket is provided at each end of the first elastic member 81. The gasket at the left end of the first elastic member 81 is limited by a step on the first valve core 513, and the gasket at the right end is limited by a locking screw. When the first valve core 513 is pushed to the left, because the orifice diameter of the gasket is larger than the outer diameter of the first valve core 513, only the middle first valve core 513 moves to the left, while the gasket at the left end remains stationary. The gasket at the right end moves to the left along with the first valve core 513 under the action of the locking screw, thereby compressing the first elastic element 81. When the leftward thrust decreases, the first valve core 513 gradually returns to its original position (free state) under the action of the first elastic element 81. When the first valve core 513 is pushed to the right, because the outer diameter of the right-end gasket is larger than the inner hole of the third sealing element 93 (plug), the right-end gasket remains stationary, while the left-end gasket moves synchronously to the right under the action of the step on the first valve core 513, thereby compressing the first elastic element 81. When the rightward thrust decreases, the first valve core 513 gradually returns to its original position (free state) under the action of the first elastic element 81.

[0046] When the first elastic member 81 is in a free state, the flow rates of the first throttling orifice 511 and the second throttling orifice 512 are equal. The other end of the first valve core 513 is provided with a driving member that can drive the first valve core 513 to move relative to the first valve sleeve 51.

[0047] The middle part of the second valve sleeve 52 is connected to the middle part of the first valve sleeve 51, and its two ends are connected to the first throttling port 511 and the second throttling port 512, respectively. The two ends of the second valve sleeve 52 are sealed by the first sealing element 91 and the second sealing element 92, respectively, and a pressure compensation valve core is provided inside the second valve sleeve 52.

[0048] It should be noted that the first valve sleeve 51 and the second valve sleeve 52 are essentially two parallel circular through holes penetrating the valve body 4, and the first valve core 513 is cylindrical. The first throttling port 511 and the second throttling port 512 are essentially coaxial with the first valve sleeve 51, but their inner diameters are larger than the holes in the first valve sleeve 51.

[0049] The first valve core 513 can adopt the following two designs:

[0050] Design Scheme 1: As shown in the following example Figure 3 As shown, the length of the reduced diameter section 514 is greater than the distance between the proximal ends of the first throttling orifice 511 and the second throttling orifice 512, but less than the distance between the distal ends of the first throttling orifice 511 and the second throttling orifice 512. Since the diameter of the first valve core 513 matches the inner diameter of the first valve sleeve 51, and the reduced diameter section 514 is provided in the middle of the first valve core 513, a step is formed at each end of the reduced diameter section 514. When the first valve core 513 is centered, the two steps are located precisely at the middle positions of the first throttling orifice 511 and the second throttling orifice 512, respectively. Therefore, the liquid flowing in from the oil inlet 6 can flow into the second valve sleeve 52 through the first throttling orifice 511 and the second throttling orifice 512, respectively, and finally flow out from the first oil outlet 71 and the second oil outlet 72, respectively. Figure 5 As shown, when the first valve core 513 moves to the left, the opening of the first throttle orifice 511 increases, while the opening of the second throttle orifice 512 decreases accordingly due to the obstruction of the first valve core 513. If the first valve core 513 continues to move to the left until the second throttle orifice 512 is completely blocked by the first valve core 513, then the second throttle orifice 512 is completely closed, and the liquid flowing in from the oil inlet 6 can only flow into the second valve sleeve 52 through the first throttle orifice 511. Figure 6 As shown, the same applies when the first valve core 513 moves to the right; this will not be elaborated further in this invention. When using design scheme one, the flow rate changes of the first throttling orifice 511 and the second throttling orifice 512 are linearly related, as shown... Figure 7 As shown.

[0051] Design Option Two: (as follows) Figure 8 and Figure 9 As shown, the length of the reduced diameter section 514 is less than the distance between the proximal ends of the first throttling orifice 511 and the second throttling orifice 512. Wedge-shaped holes 515 are provided at both ends of the reduced diameter section 514, and the diameter of the wedge-shaped holes 515 gradually decreases from the middle of the first valve core 513 towards the end. When design scheme two is adopted, the flow rate changes of the first throttling orifice 511 and the second throttling orifice 512 exhibit a curvilinear relationship, as shown... Figure 7 As shown.

[0052] By using the two different design schemes described above, different flow gains can be achieved to meet the corresponding usage requirements.

[0053] The driving component can adopt the following structure: such as Figure 3 As shown, both ends of the first valve core 513 are sealed by the third sealing element 93, forming two chambers between the two ends of the first valve core 513 and the third sealing element 93 respectively. The driving component includes a pilot control valve 111, a displacement sensor 112, and a controller 113. The pilot control valve 111 has a first valve port 1111 and a second valve port 1112, which are respectively connected to the two chambers. The displacement sensor 112 is used to obtain the position of the first valve core 513. The controller 113 is communicatively connected to the displacement sensor 112 and the pilot control valve 111. According to different control requirements, the controller 113 controls the pilot control valve 111 to inject pressurized oil through the first valve port 1111 or the second valve port 1112, thereby realizing the movement of the first valve core 513. The controller 113 also adjusts the injected pressurized oil in real time according to the current position of the first valve core 513 obtained by the displacement sensor 112, thereby adjusting the position of the first valve core 513 to a specified position to achieve a specified flow ratio.

[0054] The drive unit can also adopt the following structure: such as Figure 4 As shown, the driving component includes a rack 114 and a drive motor 115; the rack 114 is connected to the first valve core 513; the drive motor 115 is used to drive the rack 114, thereby causing the first valve core 513 to move relative to the first valve sleeve 51.

[0055] As a preferred embodiment, the pressure compensation valve core includes a first pressure compensation valve core 121, a second pressure compensation valve core 122, a second elastic element 82, a third elastic element 83, and a fourth elastic element 84.

[0056] One end of the first pressure compensation valve core 121 is provided with a first hook, and one end of the second pressure compensation valve core 122 is provided with a second hook. The first hook and the second hook cooperate with each other (hook each other) to connect the first pressure compensation valve core 121 and the second pressure compensation valve core 122.

[0057] The second elastic element 82 is disposed between the first pressure compensation valve core 121 and the second pressure compensation valve core 122; the third elastic element 83 is disposed between the first pressure compensation valve core 121 and the first sealing element 91; and the fourth elastic element 84 is disposed between the second pressure compensation valve core 122 and the second sealing element 92.

[0058] The first pressure compensation valve core 121 has a first valve chamber 131 and a first throttling orifice 141. The first sealing element 91 has a first cavity 151 and a second throttling orifice 142. The second valve sleeve 52 has a third throttling orifice 521 at a position corresponding to the first oil outlet 71. The first oil outlet 71 is sequentially connected to the third throttling orifice 521, the first throttling orifice 141, the first valve chamber 131, the first cavity 151, the second throttling orifice 142, and the first throttling orifice 511.

[0059] The second pressure compensation valve core 122 has a second valve chamber 132 and a third throttling orifice 143. The second sealing element 92 has a second cavity 152 and a fourth throttling orifice 144. The second valve sleeve 52 has a fourth throttling orifice 522 at a position corresponding to the second oil outlet 72. The second oil outlet 72 is sequentially connected to the fourth throttling orifice 522, the third throttling orifice 143, the second valve chamber 132, the second cavity 152, the fourth throttling orifice 144, and the second throttling orifice 512.

[0060] The working principle of this invention is as follows.

[0061] In the diversion mode, when the driving component does not apply thrust, the first elastic element 81 is in a free state, the first valve core 513 is in the neutral position, and the openings of the first throttling orifice 511 and the second throttling orifice 512 are the same, i.e., the flow rates are equal. Liquid enters the valve body 4 from the oil inlet 6, and then enters the second valve sleeve 52 through the first throttling orifice 511, the second throttling orifice 512, and the channel in the middle of the valve body 4. Liquid entering the second valve sleeve 52 through the first throttling orifice 511 flows sequentially through the second throttling hole 142, the first cavity 151, the first valve cavity 131, the first throttling hole 141, and the third throttling orifice 521, finally flowing out from the first oil outlet 71. Liquid entering the second valve sleeve 52 through the second throttling orifice 512 flows sequentially through the fourth throttling hole 144, the second cavity 152, the second valve cavity 132, the third throttling hole 143, and the fourth throttling orifice 522, finally flowing out from the second oil outlet 72.

[0062] like Figure 5 As shown, when the driving component drives the first valve core 513 to move to the left relative to the first valve sleeve 51, the opening degree of the first throttling orifice 511 is greater than the opening degree of the second throttling orifice 512. Therefore, the flow rate through the first throttling orifice 511 is greater than the flow rate through the second throttling orifice 512. At this time, the pressure compensation valve core will also move accordingly, adjusting the area of ​​the compensation valve orifice to balance the pressure difference, so that the pressure difference ∆P through the first throttling orifice 511 and the second throttling orifice 512 is always the same. At this time, the flow rate is still related to the opening degree of the first throttling orifice 511 and the second throttling orifice 512, thus achieving a flow splitting ratio independent of the load. Figure 6As shown, when the driving member drives the first valve core 513 to move to the right relative to the first valve sleeve 51, the opening degree of the first throttle port 511 is less than the opening degree of the second throttle port 512. Therefore, the flow rate through the first throttle port 511 is less than the flow rate through the second throttle port 512.

[0063] In the flow-collecting mode, when the driving component does not apply thrust, the first elastic element 81 is in a free state, the first valve core 513 is in the neutral position, and the openings of the first throttling orifice 511 and the second throttling orifice 512 are the same, i.e., the flow rates are equal. Liquid enters the valve body 4 from the first oil outlet 71 and the second oil outlet 72, respectively. The liquid entering from the first oil outlet 71 passes through the third throttling orifice 521, the first throttling orifice 141, the first valve chamber 131, the first cavity 151, the second throttling orifice 142, and the first throttling orifice 511, finally flowing out from the oil inlet 6. The liquid entering from the second oil outlet 72 passes through the fourth throttling orifice 522, the third throttling orifice 143, the second valve chamber 132, the second cavity 152, the fourth throttling orifice 144, and the second throttling orifice 512, merging with the liquid entering from the first oil outlet 71 before finally flowing out from the oil inlet 6.

[0064] Example 2

[0065] A control method for the above-mentioned variable split ratio flow distribution valve includes the following steps:

[0066] The target position of the first valve core is determined based on the target flow split ratio and the relationship curve between the flow split ratio and the position of the first valve core.

[0067] The control actuator drives the first valve core to the target position.

[0068] Figure 7 This illustrates the relationship between the flow rates of the first and second throttling orifices and the position of the first valve core in this invention, specifically the relationship curve between the flow split ratio and the position of the first valve core in the aforementioned method. From... Figure 7 It can be seen that when the first valve core 513 is in the middle position, the flow rates of the first throttling port 511 and the second throttling port 512 are the same. As the first valve core 513 moves, the flow rate on one side decreases, and the flow rate on the other side increases. The movement of the first valve core 513 realizes the correlation change of the flow rates on both sides.

[0069] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0070] Similarly, it should be understood that, in order to streamline this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0071] Those skilled in the art will understand that the modules, units, or groups of devices in the examples disclosed herein can be arranged in the device as described in this embodiment, or alternatively, can be located in one or more devices different from the device in this example. The modules in the foregoing examples can be combined into a single module or further divided into multiple sub-modules.

[0072] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or groups in the embodiments can be combined into a single module, unit, or group, and further, they can be divided into multiple sub-modules, sub-units, or sub-groups. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0073] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention and form different embodiments.

[0074] Furthermore, some of the embodiments described herein are methods or combinations of method elements that can be implemented by a processor of a computer system or by other means of performing the functions. Therefore, a processor having the necessary instructions for implementing the methods or method elements forms means for implementing the methods or method elements. Furthermore, the elements described herein in the apparatus embodiments are examples of means for implementing the functions performed by elements for the purposes of carrying out the invention.

[0075] The various techniques described herein can be implemented in combination with hardware or software, or a combination thereof. Thus, the methods and apparatus of the present invention, or certain aspects or portions thereof, can take the form of program code (i.e., instructions) embedded in a tangible medium, such as a floppy disk, CD-ROM, hard disk, or any other machine-readable storage medium, wherein when the program is loaded into and executed by a machine such as a computer, the machine becomes an apparatus for practicing the present invention.

[0076] When the program code is executed on a programmable computer, the computing device generally includes a processor, a processor-readable storage medium (including volatile and non-volatile memory and / or storage elements), at least one input device, and at least one output device. The memory is configured to store program code; the processor is configured to execute the method of the present invention according to instructions in the program code stored in the memory.

[0077] By way of example, and not limitation, computer-readable media include computer storage media and communication media. Computer storage media stores information such as computer-readable instructions, data structures, program modules, or other data. Communication media generally embodies computer-readable instructions, data structures, program modules, or other data in the form of modulated data signals such as carrier waves or other transmission mechanisms, and includes any information delivery medium. Any combination of the above is also included within the scope of computer-readable media.

[0078] As used herein, unless otherwise specified, the use of ordinal numbers such as “first,” “second,” “third,” etc., to describe ordinary objects merely indicates different instances of similar objects and is not intended to imply that the objects being described must have a given order in time, space, ordering, or any other manner.

[0079] Although the invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for the purpose of interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the invention is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.

[0080] Finally, it should be noted that this invention does not explain in detail the common knowledge recognized by those skilled in the art. The above description is only a specific embodiment of this invention and is not intended to limit this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A variable flow splitting ratio flow distribution valve, comprising a valve body, wherein the valve body is provided with a first valve sleeve, a second valve sleeve, an oil inlet, a first oil outlet, and a second oil outlet; the oil inlet is connected to the middle portion of the first valve sleeve; the first oil outlet and the second oil outlet are respectively connected to the second valve sleeve; characterized in that: The first valve sleeve has a first throttling orifice and a second throttling orifice symmetrically opened on both sides of the oil inlet; The first valve sleeve contains a first valve core, the diameter of which matches the inner diameter of the first valve sleeve; the first valve core has a reduced diameter section in the middle. One end of the first valve core is provided with a first elastic element; when the first elastic element is in a free state, the flow rates of the first throttling orifice and the second throttling orifice are equal; The other end of the first valve core is provided with a driving component that can drive the first valve core to move relative to the first valve sleeve; The middle part of the second valve sleeve is connected to the middle part of the first valve sleeve, and the two ends are connected to the first throttling port and the second throttling port respectively; the two ends of the second valve sleeve are sealed by the first sealing element and the second sealing element respectively, and a pressure compensation valve core is provided inside the second valve sleeve.

2. The variable split-ratio flow distribution valve according to claim 1, characterized in that: Both ends of the first valve core are sealed by a third sealing element, so that two chambers are formed between the two ends of the first valve core and the third sealing element respectively; the driving element includes a pilot control valve, which has a first valve port and a second valve port, respectively communicating with the two chambers.

3. The variable split-ratio flow distribution valve according to claim 2, characterized in that: The drive unit includes a displacement sensor and a controller; the displacement sensor is used to obtain the position of the first valve core; the controller is communicatively connected to the displacement sensor and the pilot control valve respectively.

4. The variable split-ratio flow distribution valve according to claim 1, characterized in that: The driving component includes a rack and a drive motor; the rack is connected to the first valve core; the drive motor is used to drive the rack, thereby moving the first valve core relative to the first valve sleeve.

5. The variable split-ratio flow distribution valve according to claim 1, characterized in that: The length of the narrowed section is greater than the distance between the proximal ends of the first and second throttling orifices, but less than the distance between the distal ends of the first and second throttling orifices.

6. The variable split-ratio flow distribution valve according to claim 1, characterized in that: The length of the reduced diameter section is less than the distance between the proximal ends of the first throttling orifice and the second throttling orifice; wedge-shaped holes are provided at both ends of the reduced diameter section, and the diameter of the wedge-shaped holes gradually decreases from the middle of the first valve core to the end.

7. The variable flow splitting ratio flow distribution valve according to any one of claims 1-6, characterized in that: The pressure compensation valve core includes a first pressure compensation valve core, a second pressure compensation valve core, a second elastic element, a third elastic element, and a fourth elastic element; One end of the first pressure compensation valve core is provided with a first hook, and one end of the second pressure compensation valve core is provided with a second hook. The first hook and the second hook cooperate with each other to connect the first pressure compensation valve core and the second pressure compensation valve core. The second elastic element is disposed between the first pressure compensation valve core and the second pressure compensation valve core; the third elastic element is disposed between the first pressure compensation valve core and the first sealing element; and the fourth elastic element is disposed between the second pressure compensation valve core and the second sealing element.

8. The variable split-ratio flow distribution valve according to claim 7, characterized in that: The first pressure compensation valve core has a first valve chamber and a first throttling orifice, the first sealing element has a first cavity and a second throttling orifice, and the second valve sleeve has a third throttling orifice at a position corresponding to the first oil outlet; the first oil outlet is sequentially connected to the third throttling orifice, the first throttling orifice, the first valve chamber, the first cavity, the second throttling orifice, and the first throttling orifice. The second pressure compensation valve core has a second valve chamber and a third throttling orifice, the second sealing element has a second cavity and a fourth throttling orifice, and the second valve sleeve has a fourth throttling orifice at a position corresponding to the second oil outlet; the second oil outlet is sequentially connected to the fourth throttling orifice, the third throttling orifice, the second valve chamber, the second cavity, the fourth throttling orifice, and the second throttling orifice.

9. A control method for a flow distribution valve with a variable split ratio as described in any one of claims 1-8, characterized in that, Includes the following steps: The target position of the first valve core is determined based on the target flow split ratio and the relationship curve between the flow split ratio and the position of the first valve core. The control actuator drives the first valve core to the target position.

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