Flow distributing and collecting valve and hydraulic system
By providing a limiting structure in the flow-dividing and collecting valve to radially limit the third elastic member, the problem of the elastic member getting stuck under high pressure or flow impact is solved, thereby ensuring the stable operation of the flow-dividing and collecting valve.
Patent Information
- Application Number
- CN202422913249.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The elastic parts of the diverter and collector valves are easily stuck under pressure or flow shock, causing the valve to fail and unable to work normally.
A limiting structure is set in the diversion and collection valve to radially limit the third elastic part to ensure that it does not move away from its original position under high pressure or flow impact. The limiting groove and the limiting ring are used to radially limit the end of the third elastic part to prevent it from getting stuck.
The phenomenon of the elastic member being stuck is effectively avoided, the normal operation of the flow dividing and collecting valve is ensured, and the valve failure caused by the detachment of the elastic member is avoided.
Smart Images
Figure CN223398989U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic valves, in particular to a flow dividing and collecting valve and a hydraulic system. Background Art
[0002] The diverter and collector valve is an independent hydraulic device that integrates the functions of a diverter valve and a collector valve. Its function is to enable the hydraulic system to supply hydraulic oil to two actuators in a certain proportion through one oil source, or to recover hydraulic oil from two actuators to one oil source in a certain proportion.
[0003] To separately control the flow of the two oil ports connected to the two actuators, a flow-dividing and combining valve includes two valve cores with a spring between them. Typically, the springs are sheathed on opposite sides of the two valve cores. When the oil pressure from the oil source differs from the sum of the oil pressures of the two actuators, the hydraulic oil causes the distance between the two valve cores to change, causing the spring's contact force on the valve core to also vary. In the event of a large pressure or flow shock, the springs can easily become dislodged from their original position and become stuck in the support at the lower end of the valve core, rendering the flow-dividing and combining valve ineffective. Utility Model Content
[0004] The purpose of the utility model is to provide a flow-dividing and flow-collecting valve and a hydraulic system, which can avoid the elastic parts from getting stuck and ensure that the flow-dividing and flow-collecting valve will not fail.
[0005] To achieve this purpose, the present invention adopts the following technical solutions:
[0006] A flow dividing and combining valve, comprising:
[0007] A valve sleeve, wherein a valve cavity is defined in the valve sleeve, and an oil collecting port, a first oil distribution port, and a second oil distribution port are defined on the valve sleeve and communicate with the valve cavity;
[0008] The valve core assembly is arranged in the valve cavity, and the valve core assembly includes a third elastic member and two valve cores. One valve core is provided with a first throttling hole that cooperates with the first oil distribution port, and the other valve core is provided with a second throttling hole that cooperates with the second oil distribution port. The two valve cores are movably connected along the axial direction of the valve sleeve to adjust the effective flow rate between the first throttling hole and the first oil distribution port and the effective flow rate between the second throttling hole and the second oil distribution port. The third elastic member is arranged between the two valve cores and elastically abuts against the two valve cores. Each valve core has a limiting structure, and the limiting structure is configured to radially limit one end of the third elastic member abutting against the valve core.
[0009] As an optional solution of the above-mentioned diverter and collector valve, the end surface of the valve core facing the third elastic member is provided with a limiting groove, and the end of the third elastic member is stuck in the limiting groove to be radially limited by the limiting groove.
[0010] As an optional solution for the above-mentioned diversion and collection valve, the valve core assembly also includes a limiting ring, and a boss is provided at one end of the valve core facing the third elastic member. The limiting ring includes an annular limiting wall, and the limiting wall is sleeved on the boss, and the limiting groove is formed between the limiting wall and the boss.
[0011] As an optional solution of the above-mentioned diverter and collector valve, the limiting ring further includes a bottom plate, the limiting wall ring is arranged on the outer periphery of the bottom plate, the bottom plate is provided with a sleeve hole, and the boss is passed through the sleeve hole.
[0012] As an optional solution for the above-mentioned diversion and collection valve, the valve core includes a valve core body and a hook, and the hook is arranged at the end of the valve core body along the axial direction of the valve sleeve, and when the two valve cores are in the minimum stroke, the hook abuts against the other valve core body to limit the position; when the two valve cores are in the maximum stroke, the two hooks abut and limit the position.
[0013] As an optional solution for the above-mentioned diversion and collection valve, the valve core also includes a connecting column, which connects the valve core body and the hook. The connecting columns of the two valve cores form a guide column, and the third elastic member is sleeved on the guide column.
[0014] As an optional solution of the above-mentioned flow dividing and combining valve, the outer peripheral surfaces of the two connecting columns form a cylindrical surface, and the diameter of the cylindrical surface is smaller than or equal to the inner diameter of the third elastic member.
[0015] As an optional solution of the above-mentioned flow dividing and combining valve, one of the valve cores includes a first valve core cavity and a third throttle hole, the first throttle hole and the third throttle hole are both connected to the first valve core cavity, and the third throttle hole is also connected to the valve cavity;
[0016] The other valve core includes a second valve core cavity and a fourth throttle hole. The second throttle hole and the fourth throttle hole are both connected to the second valve core cavity, and the fourth throttle hole is also connected to the valve cavity.
[0017] As an optional solution for the above-mentioned diverter and collector valve, the valve sleeve has a first end and a second end arranged opposite to each other, and a first elastic member and a second elastic member are installed in the valve cavity, one end of the first elastic member abuts against the first end, and the other end of the first elastic member abuts against one of the valve cores; one end of the second elastic member abuts against the second end, and the other end of the second elastic member abuts against the other valve core.
[0018] A hydraulic system includes the diverter and collector valve, and also includes an oil supply element and two execution units, the oil supply element is connected to the oil collection port, one of the execution units is connected to the first oil distribution port, and the other execution unit is connected to the second oil distribution port.
[0019] Beneficial effects of the utility model:
[0020] The utility model provides a flow-dividing and combining valve and a hydraulic system. In the flow-dividing and combining valve, two valve cores are disposed in a valve housing, a third elastic member is disposed between the two valve cores, and a limiting structure is disposed on one end of each valve core that abuts the third elastic member. The limiting structure can radially limit the end of the third elastic member. When pressure or flow shock is large, the limiting structure can ensure that the third elastic member does not move away from its original position, preventing the third elastic member from getting stuck between the valve core and the valve housing.
[0021] The flow-dividing and collecting valve can prevent the elastic part from getting stuck, thereby ensuring that the flow-dividing and collecting valve will not fail. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the structure of the flow dividing and collecting valve provided by the utility model. Figure 1 ;
[0023] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;
[0024] Figure 3 This is a schematic diagram of the structure of the flow dividing and collecting valve provided by the utility model. Figure 2 ;
[0025] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.
[0026] In the picture:
[0027] 1. Valve sleeve; 11. First end; 12. Second end; 13. Oil collecting port; 14. First oil distribution port; 15. Second oil distribution port; 16. First elastic member; 17. Second elastic member; 18. Sealing member; 19. Retaining ring;
[0028] 2. Valve seat;
[0029] 3. Valve core assembly; 31. Valve core; 311. Valve core body; 3111. First throttle hole; 3112. Second throttle hole; 3113. First valve core cavity; 3114. Third throttle hole; 3115. Second valve core cavity; 3116. Fourth throttle hole; 312. Hook; 313. Limiting groove; 314. Limiting ring; 3141. Limiting wall; 3142. Bottom plate; 315. Connecting column; 32. Third elastic member;
[0030] 4. Valve cover. DETAILED DESCRIPTION
[0031] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.
[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.
[0033] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or removable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.
[0034] Unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0035] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.
[0036] This embodiment provides a hydraulic system, which includes a flow dividing and collecting valve, an oil supply element and a plurality of execution units, wherein the flow dividing and collecting valve is used to distribute and collect the flow of hydraulic oil. Figures 1 to 4 As shown, the flow-dividing and collecting valve includes a valve sleeve 1 having oil ports. It is understood that the number of oil ports can be three, four, or more. In this embodiment, the valve sleeve 1 is illustrated as having three oil ports, namely, an oil collecting port 13, a first oil distribution port 14, and a second oil distribution port 15. The oil supply element is connected to the oil collecting port 13, one actuator is connected to the first oil distribution port 14, and the other actuator is connected to the second oil distribution port 15, so that the speeds of the two actuators remain synchronized or in a constant ratio.
[0037] It is worth noting that the execution unit can be a motor, a hydraulic pump, etc.
[0038] Specifically, the diverter and collector valve includes a valve sleeve 1, a valve seat 2, a valve core assembly 3 and a valve cover 4. The valve sleeve 1 has a first end 11 and a second end 12 that are relatively arranged. The valve seat 2 is arranged at the first end 11 of the valve sleeve 1, and the valve cover 4 is arranged at the second end 12 of the valve sleeve 1. The valve core assembly 3 includes two valve cores 31 that are connected to each other and can move relative to each other. The two valve cores 31 are both arranged in the valve sleeve 1 and can slide in the valve sleeve 1.
[0039] Among them, the valve sleeve 1 is roughly cylindrical, and a valve cavity is opened in the valve sleeve 1. The oil collecting port 13, the first oil distribution port 14 and the second oil distribution port 15 are all connected to the valve cavity. The hydraulic oil of the oil supply element is distributed to the first oil distribution port 14 and the second oil distribution port 15 through the diverter and collector valve to control the action of the execution unit.
[0040] like Figures 1 to 4 As shown, a first throttling hole 3111 cooperating with the first oil distribution port 14 is provided on one valve core 31, and a second throttling hole 3112 cooperating with the second oil distribution port 15 is provided on the other valve core 31. The two valve cores 31 are movably connected along the axial direction of the valve sleeve 1 to adjust the effective flow rate between the first throttling hole 3111 and the first oil distribution port 14 and the effective flow rate between the second throttling hole 3112 and the second oil distribution port 15.
[0041] Here, effective flow rate refers to the amount of hydraulic oil passing through the first orifice 3111 and the amount of hydraulic oil passing through the second orifice 3112 per unit time during the operation of the flow-dividing and collecting valve. It is worth noting that, along the axial direction of the valve sleeve 1, the distance between the first oil distribution port 14 and the oil collection port 13 is equal to the distance between the second oil distribution port 15 and the oil collection port 13. This eliminates the difference in oil pressure distributed between the first and second oil distribution ports 14, 15 due to the different distances.
[0042] Since the first oil distribution port 14 and the second oil distribution port 15 are both connected to the execution unit, when the oil pressure of the two execution units is equal, the pressure of the hydraulic oil inside the valve cavity on the two valve cores 31 is equal, that is, the two valve cores 31 are symmetrically arranged relative to the oil collecting port 13, then the effective flow rate between the first throttle hole 3111 and the first oil distribution port 14 is equal to the effective flow rate between the second throttle hole 3112 and the second oil distribution port 15, and the diverter and collector valve can equally divide the hydraulic oil entering the valve cavity from the oil collecting port 13.
[0043] When the oil pressures of the two actuator units are not equal, for example, the oil pressure at the first oil distribution port 14 is greater than the oil pressure at the second oil distribution port 15, the hydraulic oil in the valve chamber will cause the valve core 31 to move, increasing the overlapping area between the first throttling hole 3111 and the first oil distribution port 14, and reducing the overlapping area between the second throttling hole 3112 and the second oil distribution port 15, so that the effective flow rate between the first throttling hole 3111 and the first oil distribution port 14 is equal to the effective flow rate between the second throttling hole 3112 and the second oil distribution port 15, thereby realizing that one oil source supplies hydraulic oil to the two actuators in a certain proportion.
[0044] In order to allow the hydraulic oil at the oil collecting port 13 to flow out through the first oil distribution port 14 and the second oil distribution port 15, a valve core 31 includes a first valve core chamber 3113 and a third throttling hole 3114, the first throttling hole 3111 and the third throttling hole 3114 are both connected to the first valve core chamber 3113, and the third throttling hole 3114 is also connected to the valve chamber, and another valve core 31 includes a second valve core chamber 3115 and a fourth throttling hole 3116, the second throttling hole 3112 and the fourth throttling hole 3116 are both connected to the second valve core chamber 3115, and the fourth throttling hole 3116 is also connected to the valve chamber.
[0045] In this embodiment, a first elastic member 16 and a second elastic member 17 are installed in the valve cavity. One end of the first elastic member 16 abuts the first end 11, and the other end abuts one valve core 31. One end of the second elastic member 17 abuts the second end 12, and the other end abuts the other valve core 31. The first elastic member 16 and the second elastic member 17 provide a restoring force for the corresponding valve core 31. When the oil pressure on one valve core 31 increases, the valve core 31 compresses the corresponding first elastic member 16 or second elastic member 17. When the oil pressure decreases, the first elastic member 16 or the second elastic member 17 restores the position of the valve core 31.
[0046] Furthermore, the valve core assembly 3 further includes a third elastic member 32, which is disposed between the two valve cores 31 and elastically abuts against the two valve cores 31. The third elastic member 32 can also reset the two valve cores 31, thereby ensuring that the flow diverting and combining valve can continue to work.
[0047] It is worth noting that the first elastic member 16, the second elastic member 17, and the third elastic member 32 work together. When there is no hydraulic oil in the valve chamber, the first elastic member 16, the second elastic member 17, and the third elastic member 32 are all in a compressed and balanced state, ensuring that the two valve cores 31 can return to their initial positions regardless of the direction in which the hydraulic oil is driven. The first elastic member 16 and the second elastic member 17 are identical, so when there is no hydraulic oil in the valve chamber, the positions of the two valve cores 31 are symmetrical about the oil collection port 13.
[0048] like Figure 2 and Figure 4 As shown, the valve core 31 includes a valve core body 311 and a hook 312. The hook 312 is arranged at the end of the valve core body 311 along the axial direction of the valve sleeve 1, and when the two valve cores 31 are in the minimum stroke, the hook 312 abuts against the other valve core body 311 to limit the position; when the two valve cores 31 are in the maximum stroke, the two hooks 312 abut and limit the position.
[0049] When the pressure at the oil collecting port 13 is greater than the sum of the pressures of the first oil distribution port 14 and the second oil distribution port 15, the two valve cores 31 will move away from each other under the action of the pressure difference until the two hooks 312 abut and limit the position, and at this time the two valve cores 31 are in the maximum stroke; when the pressure at the oil collecting port 13 is less than the sum of the pressures of the first oil distribution port 14 and the second oil distribution port 15, the two valve cores 31 will move closer to each other under the action of the pressure difference and compress the third elastic member 32 until they are in a balanced state. If the pressure difference is large, it will move until the hook 312 abuts against the valve core body 311 of the other valve core 31 to limit the position, and at this time the two valve cores 31 are in the minimum stroke.
[0050] However, when the pressure or flow impact is large, the third elastic member 32 is easily displaced from its original position when subjected to force and stuck to the support position at the lower end of the valve core 31, causing the diverter and collector valve to fail and not function.
[0051] like Figure 2 and Figure 4 As shown, to address the above-mentioned problem, each valve core 31 has a limiting structure configured to radially limit the end of the third elastic member 32 abutting against the valve core 31. This limiting structure can radially limit the end of the third elastic member 32. When the pressure or flow impact is large, the limiting structure can ensure that the third elastic member 32 will not move out of its original position, preventing the third elastic member 32 from being stuck between the valve core 31 and the valve sleeve 1, preventing the third elastic member 32 from being stuck, and ensuring that the flow dividing and combining valve will not fail.
[0052] In some embodiments, the limiting structure may be a sleeve, which is sleeved on the outside of the third elastic member 32 to radially limit the third elastic member 32 and ensure that the end of the third elastic member 32 does not deviate radially.
[0053] In this embodiment, the first elastic member 16 , the second elastic member 17 and the third elastic member 32 are all springs.
[0054] In this embodiment, a limiting groove 313 is provided on the end surface of the valve core 31 facing the third elastic member 32. The end of the third elastic member 32 is engaged with the limiting groove 313 and is radially restrained by the limiting groove 313. The limiting groove 313 effectively radially restrains the end of the third elastic member 32 engaged with the limiting groove 313, ensuring that the end of the third elastic member 32 does not move radially and escape from the limiting groove 313. This also ensures that the third elastic member 32 does not become stuck between the valve core 31 and the valve sleeve 1, thereby preventing the flow diverter and collector valve from malfunctioning.
[0055] like Figure 2 As shown, the limit groove 313 can be formed directly from the end face of the valve core 31 by machining. This structure has high processing efficiency, and the position of the limit groove 313 is relatively stable, which can ensure that the end of the third elastic member 32 will not be offset when it is extended or retracted.
[0056] like Figure 4 As shown, the valve core assembly 3 also includes a limiting ring 314. A boss is provided at one end of the valve core 31 facing the third elastic member 32. The limiting ring 314 includes an annular limiting wall 3141 that is sleeved onto the boss, forming a limiting groove 313 between the limiting wall 3141 and the boss. The limiting wall 3141 of the limiting ring 314 is spaced apart from the sidewall of the boss to form the limiting groove 313. This not only radially limits the third elastic member 32, but also reduces processing costs. Furthermore, the limiting ring 314 can be replaced according to the size of the third elastic member 32, thereby improving the applicability of the flow diverter and collector valve.
[0057] Furthermore, the limiting ring 314 also includes a base plate 3142, a limiting wall 3141 disposed around the outer periphery of the base plate 3142, and a sleeve hole formed in the base plate 3142, through which the boss is inserted. In other words, the base plate 3142 abuts the end surface of the valve core 31 facing the third elastic member 32. At this time, the base plate 3142 can adapt to the boss through the sleeve hole, ensuring the relative radial position of the limiting ring 314 and the valve core 31 is stable, ensuring that the distance between the limiting wall 3141 and the boss remains unchanged, and further improving the stability of the third elastic member 32.
[0058] It is worth noting that although the end of the third elastic member 32 is limited by the limiting groove 313, thereby improving the radial stability of the end of the third elastic member 32, during the expansion and contraction process of the third elastic member 32, its middle position is prone to bending or twisting due to the imbalance of the compression force, thereby causing the end of the third elastic member 32 to slip out of the limiting groove 313.
[0059] like Figure 2 and Figure 4As shown, to address the above issues, the valve core 31 further includes a connecting post 315 that connects the valve core body 311 and the hook 312. The connecting posts 315 of the two valve cores 31 form a guide post, and the third elastic member 32 is sleeved on the guide post. The guide post guides the third elastic member 32 during expansion and contraction, ensuring that the third elastic member 32 can only expand and contract in the axial direction without bending or twisting.
[0060] Furthermore, the outer circumferential surfaces of the two connecting columns 315 form a cylindrical surface, the diameter of which is less than or equal to the inner diameter of the third elastic member 32. The third elastic member 32 is also cylindrical, so the cylindrical surface can support and limit the third elastic member 32. When the diameter of the cylindrical surface is less than the inner diameter of the third elastic member 32, the third elastic member 32 will not contact the cylindrical surface during normal expansion and contraction, reducing friction and energy loss. When the diameter of the cylindrical surface is equal to the inner diameter of the third elastic member 32, the cylindrical surface can always abut the third elastic member 32, ensuring that the third elastic member 32 will not bend or twist, thereby improving stability.
[0061] In this embodiment, the outer wall of the valve sleeve 1 is circumferentially provided with multiple seals 18 and multiple retaining rings 19. The multiple seals 18 are spaced apart along the axis of the valve sleeve 1. The multiple retaining rings 19 are matched with the multiple seals 18 one by one, and the retaining rings 19 are used to limit the movement of the seals 18 along the axis of the valve sleeve 1. In this embodiment, the seals 18 may be O-rings. Preferably, the outer wall of the valve sleeve 1 is circumferentially provided with multiple mounting grooves, each of which is equipped with a seal 18 and a retaining ring 19.
[0062] The following describes the working process of the diverter and collector valve:
[0063] Normal state:
[0064] The two valve cores 31 are in a balanced state in the middle of the valve sleeve 1 under the action of the first elastic member 16, the second elastic member 17, and the third elastic member 32. In this embodiment, the oil pressure at the oil collection port 13 is defined as P0, the oil pressure in the first valve core chamber 3113 is defined as P1, the oil pressure in the second valve core chamber 3115 is defined as P2, the oil pressure at the first oil distribution port 14 is defined as P3, and the oil pressure at the second oil distribution port 15 is defined as P4.
[0065] Diversion conditions:
[0066] This working condition is a condition in which the oil supply element supplies oil to the two actuators to drive the two actuators to operate, so P0 is greater than P1 and P2. At this time, the two valve cores 31 move in opposite directions, are in a state of separation, and are hooked together as an integral body.
[0067] When P4 is equal to P3, the distances between the two valve cores 31 and the oil collecting port 13 are equal, and at this time, P2 is equal to P1.
[0068] When P4 is not equal to P3, the positions of the two valve cores 31 relative to the oil collecting port 13 will be offset. The following description will be made by taking the case where P4 is greater than P3 as an example.
[0069] The initial positions of the two valve cores 31 are in the middle. At this point, P2 is greater than P1, and the two valve cores 31 move as a whole toward the first diversion port, reducing the overlapping area between the first throttle hole 3111 and the first oil diversion port 14, thereby increasing P1. The overlapping area between the second throttle hole 3112 and the second oil diversion port 15 increases, thereby decreasing P2, thereby returning P1 to equal P2. The two valve cores 31 stop moving and enter a new equilibrium state. Because the flow areas of the third and fourth throttle holes 3114 and 3116 are equal, the flow rates through the third and fourth throttle holes 3114 and 3116 are approximately equal and are unaffected by changes in P3 and P4.
[0070] It is worth noting that when P4 is less than P3, the situation is similar to the above situation and will not be described again here.
[0071] Current collecting conditions:
[0072] This working condition is a condition in which the oil supply component recovers hydraulic oil from two actuators, so P0 is smaller than P1 and P2. At this time, the two valve cores 31 move toward each other and are in a mutually compressed state.
[0073] When P4 is equal to P3, the distances between the two valve cores 31 and the oil collecting port 13 are equal, and at this time, P2 is equal to P1.
[0074] When P4 is not equal to P3, the positions of the two valve cores 31 relative to the oil collecting port 13 will be offset. The following description will be made by taking the case where P4 is greater than P3 as an example.
[0075] The two valve cores 31 are initially positioned in the middle. At this point, P2 is greater than P1, and the two valve cores 31 move as a whole toward the first diversion port. This increases the overlapping area between the first throttle hole 3111 and the first oil diversion port 14, thereby increasing P1. This decreases the overlapping area between the second throttle hole 3112 and the second oil diversion port 15, thereby decreasing P2. This resets P1 to P2, and the two valve cores 31 stop moving, reaching a new equilibrium state. Because the flow areas of the third and fourth throttle holes 3114 and 3116 are equal, the flow rates through them are approximately equal and are unaffected by changes in P3 and P4.
[0076] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.
Claims
1. A flow dividing and combining valve, characterized in that: include: A valve sleeve (1), wherein a valve cavity is formed in the valve sleeve (1), and an oil collecting port (13), a first oil distribution port (14), and a second oil distribution port (15) are formed on the valve sleeve (1); A valve core assembly (3) is arranged in the valve cavity. The valve core assembly (3) includes a third elastic member (32) and two valve cores (31). One of the valve cores (31) is provided with a first throttling hole (3111) that cooperates with the first oil distribution port (14). The other valve core (31) is provided with a second throttling hole (3112) that cooperates with the second oil distribution port (15). The two valve cores (31) are movably connected along the axial direction of the valve sleeve (1) to adjust the first throttling hole. (3111) and the effective flow rate between the first oil distribution port (14) and the effective flow rate between the second throttling hole (3112) and the second oil distribution port (15), the third elastic member (32) is arranged between the two valve cores (31) and elastically abuts against the two valve cores (31), each of the valve cores (31) has a limiting structure, and the limiting structure is configured to radially limit one end of the third elastic member (32) abutting against the valve core (31).
2. The flow dividing and combining valve according to claim 1, characterized in that: The end surface of the valve core (31) facing the third elastic member (32) is provided with a limiting groove (313), and the end of the third elastic member (32) is clamped into the limiting groove (313) to be radially limited by the limiting groove (313).
3. The flow dividing and combining valve according to claim 2, characterized in that: The valve core assembly (3) further includes a limiting ring (314), and a boss is provided at one end of the valve core (31) facing the third elastic member (32). The limiting ring (314) includes an annular limiting wall (3141), and the limiting wall (3141) is sleeved on the boss, and the limiting groove (313) is formed between the limiting wall (3141) and the boss.
4. The flow dividing and combining valve according to claim 3, characterized in that: The limiting ring (314) further comprises a bottom plate (3142), the limiting wall (3141) is arranged around the outer periphery of the bottom plate (3142), the bottom plate (3142) is provided with a sleeve hole, and the boss is passed through the sleeve hole.
5. The flow dividing and combining valve according to claim 1, characterized in that: The valve core (31) comprises a valve core body (311) and a hook (312), wherein the hook (312) is arranged at the end of the valve core body (311) along the axial direction of the valve sleeve (1), and when the two valve cores (31) are at the minimum stroke, the hook (312) abuts against the other valve core body (311) to limit the position; when the two valve cores (31) are at the maximum stroke, the two hooks (312) abut against and limit the position.
6. The flow dividing and combining valve according to claim 5, characterized in that: The valve core (31) further comprises a connecting column (315), wherein the connecting column (315) connects the valve core body (311) and the hook (312), and the connecting columns (315) of the two valve cores (31) form a guide column, and the third elastic member (32) is sleeved on the guide column.
7. The flow dividing and combining valve according to claim 6, characterized in that: The outer circumferential surfaces of the two connecting columns (315) form a cylindrical surface, and the diameter of the cylindrical surface is less than or equal to the inner diameter of the third elastic member (32).
8. The flow dividing and combining valve according to any one of claims 1 to 7, characterized in that: The valve core (31) comprises a first valve core cavity (3113) and a third throttle hole (3114), wherein the first throttle hole (3111) and the third throttle hole (3114) are both in communication with the first valve core cavity (3113), and the third throttle hole (3114) is also in communication with the valve cavity; The other valve core (31) includes a second valve core cavity (3115) and a fourth throttle hole (3116), the second throttle hole (3112) and the fourth throttle hole (3116) are both connected to the second valve core cavity (3115), and the fourth throttle hole (3116) is also connected to the valve cavity.
9. The flow dividing and combining valve according to claim 1, characterized in that: The valve sleeve (1) has a first end (11) and a second end (12) arranged opposite to each other, and a first elastic member (16) and a second elastic member (17) are installed in the valve cavity, one end of the first elastic member (16) abuts against the first end (11), and the other end of the first elastic member (16) abuts against one of the valve cores (31); one end of the second elastic member (17) abuts against the second end (12), and the other end of the second elastic member (17) abuts against the other valve core (31).
10. A hydraulic system, characterized in that: The hydraulic system includes a flow dividing and collecting valve according to any one of claims 1 to 9, and also includes an oil supply element and two execution units, wherein the oil supply element is connected to the oil collecting port (13), one of the execution units is connected to the first oil distribution port (14), and the other of the execution units is connected to the second oil distribution port (15).