Overflow valve
By incorporating an arc-shaped protrusion and groove fitting design in the overflow valve, along with a spherical abutment part on the split adjustment rod, the problems of vibration and whistling in the overflow valve and unstable pressure regulation are solved, achieving a stable pressure regulation process.
Patent Information
- Application Number
- CN202423160483.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing relief valves suffer from vibration, whistling, and unstable pressure regulation during use. This is mainly due to the fact that the contact surface between the valve core and the spring seat is a sloped and arc-shaped surface, causing the spring to vibrate, and the friction between the adjusting rod and the spring is unstable.
Arc-shaped protrusions and arc-shaped grooves are provided on the valve core and the first spring seat to maintain a close fit. The design of the split adjustment rod and the spherical abutment part of the second spring seat avoids direct contact between the springs and enhances the stability of the adjustment process.
It effectively avoids the shaking and whistling phenomenon, ensures the stability of the overflow valve during operation and the stability of the pressure regulation process, reduces friction and radial torque, and improves the straightness of the pressure regulating spring.
Smart Images
Figure CN223578348U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field, concretely relates to a spill valve. BACKGROUND
[0002] The spill valve is a kind of hydraulic pressure control valve, and its working principle mainly depends on the interaction of spring and valve core. Figure 1 As shown in the figure, when the pressure in the hydraulic system is small, the hydraulic pressure acting on the valve core 200' is less than the pre-tightening force of the spring 400', the valve core 200' is in the closed position under the action of the spring 400', the oil inlet 101' and the oil return port 102' are separated, and the hydraulic oil cannot flow back to the oil tank through the spill valve;When the system pressure rises, the hydraulic pressure acting on the valve core 200' can overcome the pre-tightening force of the spring 400', the valve core 200' is lifted, the oil inlet 101' and the oil return port 102' are communicated, the hydraulic oil flows into the oil inlet 101', passes through the gap between the valve core 200' and the valve seat 100', and flows back to the oil tank from the oil return port 102', so as to realize overflow and keep the pressure of the whole system constant.
[0003] However, the spill valve in the related art usually has the following problems when in use:
[0004] 1) The side, away from the oil inlet 101', of the valve core 200' is provided with a conical protrusion 201', the spring seat 300' is provided with an arc-shaped hole 301', and the conical protrusion 201' is inserted into the arc-shaped hole 301' of the spring seat 300', so that the contact surface between the valve core 200' and the spring seat 300' is the contact of inclined plane and arc surface, which is point contact, so that the spring seat 300' will vibrate in the compression process of the spring 400', causing the spring 400' to vibrate, and further causing the problem of dithering whistling.
[0005] 2) The end, away from the valve core 200', of the spring 400' directly abuts against the adjusting rod 500', when the adjusting rod 500' rotates to adjust the pre-tightening force of the spring 400', the spring 400' will not only be subjected to the pressure along the axis direction of the valve seat 100', but also be subjected to the torsion along the circumferential direction of the valve seat 100' due to the friction between the end surface of the spring 400' and the adjusting rod 500', so that the instability of the spring 400' in adjusting the pre-tightening force value is increased.
[0006] Therefore, there is an urgent need for a spill valve to solve the above problems. CONTENT OF THE UTILITY MODEL
[0007] The utility model aims at solving or at least alleviating part or all of the above problems. To this end, the utility model aims at providing a spill valve, which can avoid the phenomenon of overflow dithering whistling in the working process, and can ensure the stability of the pressure regulating process.
[0008] To achieve the above object, the utility model discloses the following technical scheme:
[0009] An overflow valve, comprising:
[0010] Valve seat, with valve cavity, oil inlet and oil return port;
[0011] Valve core assembly, including valve core and first spring seat, both are slidably arranged in the valve cavity, and the valve core can selectively open and close the passage between the oil inlet and the oil return port, one of the valve core and the first spring seat is provided with an arc-shaped protrusion, and the other is provided with an arc-shaped groove that can be fitted with the arc-shaped protrusion;
[0012] Adjusting assembly, including adjusting rod and second spring seat, the second spring seat is slidably arranged in the valve cavity, the second spring seat is provided with a spherical abutting portion away from the valve core, the adjusting rod is partially provided in the valve seat and adjustably connected to the valve seat, and the end of the adjusting rod extending into the valve seat is rotationally matched with the spherical abutting portion.
[0013] Pressure regulating spring, located in the valve cavity, and the two ends of the pressure regulating spring are respectively pressed on the first spring seat and the second spring seat.
[0014] As a preferred scheme of the overflow valve provided by the utility model, the adjusting rod is provided with an abutting groove rotationally matched with the spherical abutting portion.
[0015] As a preferred scheme of the overflow valve provided by the utility model, the spherical abutting portion is an abutting ball, the second spring seat is provided with a containing groove, and the abutting ball is interference-fitted in the containing groove.
[0016] As a preferred scheme of the overflow valve provided by the utility model, the abutting ball is made of steel material.
[0017] As a preferred scheme of the overflow valve provided by the utility model, the end of the second spring seat away from the valve core is partially outwardly convex to form the spherical abutting portion.
[0018] As a preferred scheme of the overflow valve provided by the utility model, along the axial direction of the valve seat, the distance between the contact position of the arc-shaped protrusion and the arc-shaped groove and the opening of the arc-shaped groove is 1mm-2mm.
[0019] As a preferred scheme of the overflow valve provided by the utility model, the opening angle of the arc-shaped groove is 90°-180°.
[0020] As a preferred scheme of the overflow valve provided by the utility model, the first spring seat is in the shape of stepped shaft, one end of the pressure regulating spring is sleeved on the small diameter section of the first spring seat and abuts on the stepped surface of the first spring seat; and / or
[0021] The second spring seat is in the shape of stepped shaft, the other end of the pressure regulating spring is sleeved on the small diameter section of the second spring seat and abuts on the stepped surface of the second spring seat.
[0022] As a preferred scheme of the overflow valve provided by the utility model, a first pressure relief channel is formed in the first spring seat, a second pressure relief channel is formed in the valve core and is communicated with the first pressure relief channel, one end of the first pressure relief channel away from the valve core is communicated with the valve cavity, and one end of the second pressure relief channel away from the first spring seat is communicated with the oil return port.
[0023] As a preferred scheme of the overflow valve provided by the utility model, the valve core comprises a valve core main body and a valve core protrusion protruding on the valve core main body, the valve core main body is in sealing contact with the inner wall of the valve cavity, and the valve core protrusion can block the oil inlet.
[0024] The utility model discloses beneficial effect lies in:
[0025] The overflow valve provided by the utility model has the advantages that: the arc-shaped protrusion and the arc-shaped groove that can be attached to each other are arranged on the valve core and the first spring seat respectively, so that the two always maintain the attached state when the pressure regulating spring is compressed, thereby avoiding the phenomenon of shaking and whistling caused by the vibration of the pressure regulating spring, and further ensuring the stability of the entire overflow valve during the working process; the adjusting rod and the second spring seat are arranged in a split mode, and the spherical abutting part that can be rotationally matched with the adjusting rod is arranged on the second spring seat, so that the pressure regulating spring does not directly contact the adjusting rod, and when the adjusting rod is adjusted to adjust the pre-tightening force of the pressure regulating spring, the second spring seat will not be synchronously rotated by the adjusting rod, so that the pressure regulating spring can be subjected to the axial pressure from the second spring seat; in addition, the arrangement of the spherical abutting part can on the one hand enable the pressure regulating spring to have the function of self-calibration positioning when the pre-tightening force is adjusted, and enhance the stability during the adjustment process; and on the other hand, the spherical abutting part can also reduce the contact area between the adjusting rod and the second spring seat, reduce the friction, thereby reducing the radial torsion on the pressure regulating spring transmitted by the adjusting rod, and further effectively improving the straightness of the pressure regulating spring during the adjustment, and further ensuring the stability of the pressure regulating process of the overflow valve. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the contents of the embodiments of the present application and the drawings.
[0027] Figure 1 is a sectional structure schematic diagram of an overflow valve provided by the related art;
[0028] Figure 2 is a sectional structure schematic diagram of an overflow valve provided by the embodiments of the present application;
[0029] Figure 3 is a first part structure schematic diagram of Figure 2 ;
[0030] Figure 4 is a second part structure schematic diagram of Figure 2 .
[0031] Reference signs:
[0032] 100', valve seat; 101', oil inlet; 102', oil return; 200', valve core; 201', conical protrusion; 300', spring seat; 301', arc-shaped hole; 400', spring; 500', adjusting rod;
[0033] 100, valve seat; 1001, valve cavity; 110, main valve seat; 111, oil inlet; 112, oil return; 120, valve sleeve; 130, screw sleeve;
[0034] 200, valve core assembly; 210, valve core; 2101, valve core body; 2102, valve core protrusion; 211, arc-shaped groove; 212, second pressure relief channel; 213, second mounting groove; 220, first spring seat; 221, arc-shaped protrusion; 222, first pressure relief channel;
[0035] 300, adjusting assembly; 310, adjusting rod; 311, abutting groove; 312, first mounting groove; 320, second spring seat; 321, accommodating groove; 330, spherical abutting part;
[0036] 400, pressure regulating spring;
[0037] 501, first sealing element; 502, second sealing element. DETAILED DESCRIPTION
[0038] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings. It is to be further understood that the application can be carried out by specifically different embodiments and equivalents thereof.
[0039] In the present application, the terms "comprise", "contain", "have" or any other variant thereof are intended to cover non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device comprising the element.
[0040] In the present application, the term "and / or" is a description of the association relationship of the associated objects, which means that there can be three kinds of relationships. For example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents a "and / or" relationship between the front and rear associated objects.
[0041] In the present application, the terms "connection", "combination", "coupling" and "installation" can be direct connection, combination, coupling or installation, or indirect connection, combination, coupling or installation. Among them, the direct connection means that two parts or components are connected together without setting an intermediate part, and the indirect connection means that two parts or components are connected with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.
[0042] In the present application, those skilled in the art will understand that the relative terms used in connection with the number or condition (for example, "about", "approximately", "substantially" and the like) include the values indicated by the context. For example, the relative terms at least include the error degree related to the measurement of the specific value, the tolerance caused by manufacturing, assembly, use and the like related to the specific value. Such terms should also be regarded as disclosing the range defined by the absolute values of the two endpoints. The relative term can refer to the addition or subtraction of a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to the addition or subtraction of a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.
[0043] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.
[0044] In this utility model, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when one element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent the direct orientation but can also be understood as the lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.
[0045] This embodiment provides an overflow valve, which is based on the first-generation product ( Figure 1 Improvements have been made to address the issues of potential howling, jitter, and instability in the voltage regulation process disclosed (as shown). The following section will discuss these improvements in conjunction with... Figures 2-4 The specific structure of the overflow valve provided in this embodiment will be described in detail.
[0046] Figure 2 A cross-sectional view of the overflow valve provided in this embodiment is shown. Figure 3 It shows Figure 2 The first part of the structural diagram. Figure 4 It shows Figure 2 The second part of the structural diagram. (See diagram below.) Figures 2-4As shown, this embodiment provides an overflow valve, which includes a valve seat 100, a valve core assembly 200, an adjusting assembly 300, and a pressure regulating spring 400. The valve seat 100 has a valve cavity 1001, an oil inlet 111, and an oil return port 112. The valve core assembly 200 includes a valve core 210 and a first spring seat 220, both of which are slidably disposed in the valve cavity 1001. The valve core 210 can selectively open and close the passage between the oil inlet 111 and the oil return port 112. One of the valve core 210 and the first spring seat 220 is provided with an arc-shaped protrusion 221, and the other is provided with a part that can interact with the arc-shaped protrusion 221. The fitting arc-shaped groove 211; the adjusting assembly 300 includes an adjusting rod 310 and a second spring seat 320, the second spring seat 320 is slidably disposed in the valve cavity 1001, and a ball-shaped abutment part 330 is provided at the end of the second spring seat 320 away from the valve core 210. The adjusting rod 310 is partially inserted through the valve seat 100 and is adjustablely connected to the valve seat 100. The end of the adjusting rod 310 extending into the valve seat 100 is rotatably engaged with the ball-shaped abutment part 330; the pressure regulating spring 400 is located in the valve cavity 1001, and the two ends of the pressure regulating spring 400 abut against the first spring seat 220 and the second spring seat 320 respectively.
[0047] The overflow valve provided in this embodiment, by providing arc-shaped protrusions 221 and arc-shaped grooves 211 that can fit together on the valve core 210 and the first spring seat 220 respectively, ensures that the two remain in contact when the pressure regulating spring 400 is compressed, thereby avoiding the shaking and whistling phenomenon caused by the vibration of the pressure regulating spring 400, and thus ensuring the stability of the entire overflow valve during operation; by providing a separate adjusting rod 310 and a second spring seat 320, and by providing a spherical abutment part 330 on the second spring seat 320 that can rotate with the adjusting rod 310, the pressure regulating spring 400 does not directly contact the adjusting rod 310, and the adjusting rod 310 is adjusted to apply preload to the pressure regulating spring 400. During adjustment, the adjusting rod 310 will not drive the second spring seat 320 to rotate synchronously, thus allowing the pressure regulating spring 400 to receive axial pressure from the second spring seat 320. In addition, the spherical abutment part 330 can, on the one hand, enable the pressure regulating spring 400 to have a self-calibrating positioning function when adjusting the preload, thereby enhancing its stability during the adjustment process; on the other hand, it can also reduce the contact area between the adjusting rod 310 and the second spring seat 320, reducing friction, thereby reducing the radial torque transmitted by the adjusting rod 310 on the pressure regulating spring 400, thus effectively improving the straightness of the pressure regulating spring 400 during adjustment, and further ensuring the stability of the pressure regulating process of the relief valve.
[0048] Optionally, in this embodiment, the adjusting rod 310 is threaded to the valve seat 100. When the adjusting rod 310 is rotated, it can move relative to the valve seat 100 along its axial direction, thereby adjusting the preload of the pressure regulating spring 400.
[0049] In the embodiment, the arc-shaped protrusion 221 is arranged on the first spring seat 220, and the arc-shaped groove 211 is arranged on the valve core 210, so as to facilitate processing. Of course, in other embodiments, the arc-shaped protrusion 221 can be arranged on the valve core 210, and the arc-shaped groove 211 can be arranged on the first spring seat 220, and the design can also achieve the above-mentioned effect.
[0050] As shown in Figure 2 and Figure 3 , along the axial direction of the valve seat 100, the distance h between the contact position of the arc-shaped protrusion 221 and the arc-shaped groove 211 and the opening of the arc-shaped groove 211 is 1mm-2mm. With this arrangement, when the system pressure rises and pushes the valve core 210 to move along its axial direction, relative movement between the valve core 210 and the first spring seat 220 can be prevented, and the arc-shaped protrusion 221 can be prevented from being pulled out of the arc-shaped groove 211. Of course, the specific value of the distance h between the contact position of the arc-shaped protrusion 221 and the arc-shaped groove 211 and the opening of the arc-shaped groove 211 is not limited in the embodiment, and the designer can adjust the specific value of h according to the actual processing requirements.
[0051] Optionally, the opening angle of the arc-shaped groove 211 is 90°-180°, so that the arc-shaped protrusion 221 can be smoothly inserted into the arc-shaped groove 211 during assembly, and the assembly efficiency is improved.
[0052] As shown in Figure 2 and Figure 4 , the adjusting rod 310 is provided with an abutting groove 311 which is rotationally matched with the spherical abutting part 330. It can be understood that the cooperation between the adjusting rod 310 and the spherical abutting part 330 is point-surface contact, so that when the adjusting rod 310 rotates, the contact point between the adjusting rod 310 and the spherical abutting part 330 is easy to deviate from the axis of the adjusting rod 310, causing the second spring seat 320 to be unevenly stressed on both sides along its axial direction, and further causing the pressure regulating spring 400 to be deflected. By arranging the abutting groove 311 on the adjusting rod 310, the abutting groove 311 can limit the second spring seat 320, so as to prevent the contact point between the adjusting rod 310 and the spherical abutting part 330 from deviating from the axis of the adjusting rod 310 when the adjusting rod 310 rotates, thereby improving the stability of the pressure regulating process.
[0053] In the embodiment, the spherical abutting part 330 is an abutting ball, and the second spring seat 320 is provided with a containing groove 321, and the abutting ball is interference-fitted in the containing groove 321, facilitating processing and assembly, and without other connecting structures, the stable installation of the abutting ball on the second spring seat 320 can be achieved. Optionally, the abutting ball is made of steel material, which can reduce the processing cost and improve the wear resistance of the spherical abutting part 330, thereby prolonging the service life of the entire overflow valve.
[0054] Of course, in other embodiments, the second spring seat 320 is formed with the above-mentioned spherical abutting portion 330 outwardly protruding from one end portion of the valve core 210, which also can achieve the above-mentioned effect.
[0055] To ensure the sealing between the adjusting rod 310 and the valve seat 100, a first sealing member 501 is arranged between the adjusting rod 310 and the valve seat 100. Optionally, the adjusting rod 310 is further provided with a first mounting groove 312 for mounting the first sealing member 501, so as to stably mount the first sealing member 501 and avoid its falling off during use. In the embodiment, the first sealing member 501 is a rubber sealing ring, which has good sealing effect and low cost.
[0056] As shown in Figures 2-4 , the first spring seat 220 is in the shape of a stepped shaft, one end of the pressure regulating spring 400 is sleeved on the small-diameter section of the first spring seat 220 and abuts against the stepped surface of the first spring seat 220; the second spring seat 320 is also in the shape of a stepped shaft, the other end of the pressure regulating spring 400 is sleeved on the small-diameter section of the second spring seat 320 and abuts against the stepped surface of the second spring seat 320. This arrangement can limit the pressure regulating spring 400, so that the pressure regulating spring 400 can only be elongated or compressed along its own axis, thereby ensuring the stability of the adjusting process. The arc-shaped protrusion 221 is protruded from the large-diameter section of the first spring seat 220 close to the valve core 210.
[0057] As shown in Figure 2 , the valve seat 100 includes a main valve seat 110, a valve sleeve 120 and a screw sleeve 130. The valve sleeve 120 is located between the main valve seat 110 and the screw sleeve 130, and is sleeved on the outer side of the main valve seat 110. The screw sleeve 130 is sleeved on the outer side of the valve sleeve 120. The main valve seat 110, the valve sleeve 120 and the screw sleeve 130 are sequentially connected to form the above-mentioned valve chamber 1001. The valve core 210 is slidingly arranged in the main valve seat 110. The first spring seat 220, the pressure regulating spring 400 and the second spring seat 320 are arranged in the valve sleeve 120. The adjusting rod 310 is screwed on the screw sleeve 130. Optionally, the main valve seat 110 and the valve sleeve 120 are threadedly connected, and the valve sleeve 120 and the screw sleeve 130 are threadedly connected, which facilitates disassembly and processing.
[0058] As shown in Figure 3 , to avoid oil leakage from the gap between the valve core 210 and the inner wall of the valve chamber 1001 after the passage between the oil inlet 111 and the oil return port 112 is opened, a second sealing member 502 is arranged between the valve core 210 and the inner wall of the valve chamber 1001. Optionally, the valve core 210 is further provided with a second mounting groove 213 for mounting the second sealing member 502, so as to stably mount the second sealing member 502 and avoid its falling off during use. In the embodiment, the second sealing member 502 is a rubber sealing ring, which has good sealing effect and low cost.
[0059] The valve core 210 comprises a valve core body 2101 and a valve core protrusion 2102 protruding on the valve core body 2101, the valve core body 2101 is in sealing contact with the inner wall of the valve cavity 1001, and the valve core protrusion 2102 can block the oil inlet 111. By arranging the valve core protrusion 2102, the sealing performance of the valve core 210 in the closed position can be ensured, and when the valve core 210 moves along the axial direction to move away from the oil inlet 111, the gap between the valve core protrusion 2102 and the oil inlet 111 gradually increases, thereby ensuring that the flow in the system remains stable, and further maintaining the normal operation and stability of the entire hydraulic system. The second mounting groove 213 is arranged on the side wall of the valve core body 2101.
[0060] As shown in Figure 3 The first spring seat 220 is provided with a first pressure relief channel 222, and the valve core 210 is provided with a second pressure relief channel 212 in communication with the first pressure relief channel 222. The end of the first pressure relief channel 222 away from the valve core 210 is in communication with the valve cavity 1001, and the end of the second pressure relief channel 212 away from the first spring seat 220 is in communication with the oil return port 112. When the system pressure rises so that the hydraulic pressure acting on the valve core 210 can overcome the pre-tightening force of the pressure regulating spring 400, the valve core 210 moves along the axial direction to move away from the oil inlet 111, at this time, the pressure regulating spring 400 is compressed, and the hydraulic oil in the spring cavity (the chamber accommodating the pressure regulating spring 400) of the valve cavity 1001 can flow back to the oil tank through the first pressure relief channel 222, the second pressure relief channel 212 and the oil return port 112, thereby achieving the effect of pressure relief of the spring cavity, and further ensuring the normal operation and stability of the entire system.
[0061] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the above examples do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.
Claims
1. A relief valve characterized by, The application relates to a valve seat (100) having a valve cavity (1001), an oil inlet (111) and an oil return (112); a valve core assembly (200) comprising a valve core (210) and a first spring seat (220), both of which are slidingly arranged in the valve cavity (1001), and the valve core (210) can selectively open and close the passage between the oil inlet (111) and the oil return (112), one of the valve core (210) and the first spring seat (220) is provided with an arc-shaped protrusion (221), and the other is provided with an arc-shaped groove (211) which can be fitted with the arc-shaped protrusion (221); an adjusting assembly (300) comprising an adjusting rod (310) and a second spring seat (320), the second spring seat (320) is slidingly arranged in the valve cavity (1001), the second spring seat (320) is provided with a spherical abutting part (330) at one end away from the valve core (210), and the adjusting rod (310) is partially arranged in the valve seat (100) and adjustably connected to the valve seat (100), one end of the adjusting rod (310) extending into the valve seat (100) is rotationally matched with the spherical abutting part (330); a pressure regulating spring (400) is arranged in the valve cavity (1001), and two ends of the pressure regulating spring (400) are respectively abutted against the first spring seat (220) and the second spring seat (320). The adjusting rod (310) is provided with an abutting groove (311) which is rotationally matched with the spherical abutting part (330). The spherical abutting part (330) is an abutting ball, and the second spring seat (320) is provided with a containing groove (321), and the abutting ball is interference-fitted in the containing groove (321). The abutting ball is made of steel. The second spring seat (320) is partially outwardly protruded at one end away from the valve core (210) to form the spherical abutting part (330).
2. The overflow valve of claim 1, wherein Along the axial direction of the valve seat (100), the distance between the contact position of the arc-shaped protrusion (221) and the arc-shaped groove (211) and the opening of the arc-shaped groove (211) is 1mm-2mm.
3. The relief valve of claim 1, wherein The opening angle of the arc-shaped groove (211) is 90-180 degrees.
4. The overflow valve of claim 3, wherein The first spring seat (220) is in a stepped shaft shape, one end of the pressure regulating spring (400) is sleeved on the small-diameter section of the first spring seat (220) and abutted against the stepped surface of the first spring seat (220); and / or the second spring seat (320) is in a stepped shaft shape, the other end of the pressure regulating spring (400) is sleeved on the small-diameter section of the second spring seat (320) and abutted against the stepped surface of the second spring seat (320).
5. The relief valve of claim 1, wherein 6. The overflow valve of claim 1, wherein 7. The relief valve of claim 1, wherein 8. The relief valve of claim 1, wherein 9. The relief valve according to any one of claims 1 to 8, characterized in that A first pressure relief passage (222) is formed in the first spring seat (220), and a second pressure relief passage (212) is formed in the valve core (210) and communicates with the first pressure relief passage (222), one end of the first pressure relief passage (222) away from the valve core (210) communicates with the valve cavity (1001), and one end of the second pressure relief passage (212) away from the first spring seat (220) communicates with the oil return port (112).
10. The relief valve according to any one of claims 1 to 8, characterized in that The valve core (210) comprises a valve core body (2101) and a valve core protrusion (2102) protruding from the valve core body (2101), the valve core body (2101) is in sealing contact with the inner wall of the valve cavity (1001), and the valve core protrusion (2102) can block the oil inlet (111).