Overflow valve
By introducing a sliding fit design for the guide and mating parts in the relief valve, the pressure drop problem at the oil inlet is solved, the valve core moves stably, vibration and noise are reduced, and the system's operational stability is improved.
Patent Information
- Application Number
- CN202423160502.9
- 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
The existing relief valve has a large pressure drop at the oil inlet, which easily causes cavitation and flow separation, resulting in unstable pressure, loud noise, and severe valve core vibration.
The design employs a guide section and a mating section, with the valve core movably positioned along the axial direction of the connecting part. The guide section and the mating section slide together to achieve radial limiting of the valve core. An oil film is formed through the guide groove to suppress vibration and avoid cavitation and flow separation.
It effectively suppresses valve core vibration and noise, ensures pressure stability, reduces blockage and impact problems caused by excessive radial and axial movement of the valve core, and improves system stability.
Smart Images
Figure CN223578349U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field especially relates to a relief valve. BACKGROUND
[0002] In mechanical hydraulic system, to prevent system pressure from being too large and exceeding the limit value, a relief valve is usually installed in the system to ensure that the system will not appear pressure overshoot phenomenon due to excessive pressure, thereby ensuring the stability of operation and protecting the hydraulic equipment.
[0003] The relief valve generally comprises a valve seat assembly and a valve core, the valve seat assembly is provided with an oil inlet hole, the valve core is arranged in the valve seat assembly along the axial direction of the valve seat assembly to open or close the oil inlet hole, and an elastic member is arranged to drive the valve core to block the oil inlet hole. SUMMARY
[0004] The utility model discloses a relief valve, which solves the technical problems of the prior art, such as large pressure drop at the valve port, cavitation and flow separation, unstable pressure, vibration and loud noise.
[0005] To achieve this purpose, the utility model adopts the following technical scheme:
[0006] The utility model provides a relief valve, which comprises:
[0007] A valve seat assembly is provided with an accommodating space, and the valve seat assembly is provided with an oil inlet hole communicating with the accommodating space;
[0008] A connecting piece is arranged in the accommodating space, and the connecting piece is connected with the valve seat assembly;
[0009] A valve core is arranged in the valve seat assembly along the axial direction of the connecting piece, and the valve core is arranged in the valve seat assembly to block or open the oil inlet hole.
[0010] The spool of the overflow valve is arranged in the valve seat assembly in an axial direction of the connecting piece at least partially movably, so that the spool blocks or opens the oil inlet hole, the overflow valve comprises a guide part and a matching part, one of the guide part and the matching part is located in the spool, and the other of the guide part and the matching part is located in the connecting piece, the guide part and the matching part are in sliding fit, so that the spool can be radially limited, cavitation and flow separation caused by large pressure drop at the oil inlet hole of the valve seat assembly are avoided, and pressure instability caused by vibration is avoided, so that the effect of shock absorption is achieved.
[0011] As a preferred solution of the above overflow valve, the guide part is located at one end of the spool away from the oil inlet hole, and the matching part is located in the connecting piece.
[0012] Alternatively, the guide part is located in the connecting piece, and the matching part is located in the spool.
[0013] The guide part is arranged at one end of the spool away from the oil inlet hole, so that one end of the spool away from the oil inlet hole can be limited and prevented from vibrating. The guide part is located in the connecting piece, and the matching part is located in the spool, so that the guide effect of the spool can also be achieved.
[0014] As a preferred solution of the above overflow valve, the connecting piece is provided with a sliding groove in an axial direction thereof, one end of the spool is slidingly arranged in the sliding groove, the matching part is a guide groove arranged in a side wall of the sliding groove, the guide groove has an opening in an outer side wall of the connecting piece, the opening is communicated with the containing space, the guide part extends into the guide groove through the opening, and the guide part is slidingly arranged in the guide groove in the axial direction of the connecting piece.
[0015] The spool slides in the sliding groove of the connecting piece, and the guide part slides in the guide groove, so that the guide effect of the movement of the spool is achieved, and the radial movement of the spool is avoided.
[0016] As a preferred solution of the above overflow valve, in a radial direction of the connecting piece, the guide part is protruded relative to the spool, and the guide part and the spool are in an integrated structure.
[0017] In the radial direction of the connecting piece, the guide part is protruded relative to the spool, and the guide part and the spool are in an integrated structure, so that the structure is simple, the number of parts is reduced, and the steps of assembling the guide part and the spool are reduced.
[0018] As a preferred solution of the above overflow valve, the connecting piece is used to divide the containing space into a first containing sub-space and a second containing sub-space, and the first containing sub-space is located at one side of the connecting piece away from the oil inlet hole.
[0019] The valve core extends into the chute and forms a third containing space between the valve core and the wall of the chute, and the guide groove is deeper than the bottom surface of the first containing sub-space along the axial direction of the connecting piece.
[0020] The guide portion moves along the guide groove to connect or disconnect the first containing sub-space and the third containing space through the guide groove.
[0021] The guide portion moves along the guide groove to connect the first containing sub-space and the third containing space through the guide groove, so that an oil film is formed between the third containing space and the valve core, which can inhibit the radial vibration of the valve core, and the damping effect formed by the viscous friction of the oil film during the movement of the valve core can inhibit the vibration to make the movement of the valve core more stable.
[0022] The guide groove is deeper than the bottom surface of the first containing sub-space along the axial direction of the connecting piece, so that the valve core can disconnect the first containing sub-space and the third containing space, at this time, the oil in the third containing space cannot flow into the first containing sub-space, and the movement of the valve core is limited to avoid the problem of pressure build-up caused by the blockage of the oil inlet due to the excessive movement distance of the valve core; at the same time, the impact problem caused by the solid limit can also be avoided.
[0023] As a preferred scheme of the above-mentioned overflow valve, along the circumferential direction of the connecting piece, the distance between the two opposite walls defining the guide groove is L, and 0.5mm≤L≤1mm.
[0024] The above-mentioned arrangement can realize effective connection of the first containing sub-space and the third containing space, and can also play a good guiding role on the guide portion.
[0025] As a preferred scheme of the above-mentioned overflow valve, the valve seat assembly includes a valve body and a valve seat which are detachably connected, one end of the valve body is provided with the oil inlet hole, the other end of the valve body is connected with the valve seat, and the first containing sub-space is formed between the connecting piece and the valve seat.
[0026] The valve seat assembly includes a valve body and a valve seat which are detachable, and the disassembly and assembly are relatively convenient.
[0027] As a preferred scheme of the above-mentioned overflow valve, the connecting piece includes:
[0028] The connecting body is provided with a containing groove, and the opening of the containing groove is arranged towards the oil inlet hole;
[0029] A connecting rod is connected to the connecting body at one end and extends out of the valve seat at the other end. The connecting rod is provided with the sliding groove in communication with the accommodating groove. The guide groove extends from the groove bottom of the accommodating groove to the connecting rod and is deeper than the bottom surface of the first cavity along the axial direction of the connecting member.
[0030] The above structure of the connecting member is simple and can limit the radial movement of the valve core to avoid vibration of the valve core in the radial direction. The structure can also limit the axial movement of the valve core to avoid excessive movement of the valve core in the axial direction, which can cause the valve core to block the oil inlet hole.
[0031] As a preferred solution of the overflow valve, the valve seat comprises:
[0032] The valve seat bottom wall part is connected to the valve seat side wall part to form a valve seat guide groove. Part of the structure of the connecting body is arranged in the valve seat guide groove. The connecting rod extends out of the through hole in the valve seat bottom wall part. The guide groove extends into the valve seat bottom wall part. The inner wall of the groove bottom of the valve seat guide groove separates the guide groove into a first section guide groove and a second section guide groove. The second section guide groove is arranged on the side of the first section guide groove away from the oil inlet hole.
[0033] When the guide part extends into the first section guide groove, the first sub- accommodating space and the third accommodating space are in communication through the guide groove.
[0034] When the guide part extends from the first section guide groove into the second section guide groove, the first sub-accommodating space and the third accommodating space are separated.
[0035] The valve seat bottom wall part is connected to the valve seat side wall part to form a valve seat guide groove. Part of the structure of the connecting body is arranged in the valve seat guide groove. The connecting rod extends out of the through hole in the valve seat bottom wall part. When the valve core moves along the axial direction of the valve seat assembly, the guide part extends into the first section guide groove, and the first sub-accommodating space and the third accommodating space are in communication through the guide groove. At this time, an oil film is formed between the third accommodating space and the valve core. The damping effect of the viscous friction of the oil film during the movement of the valve core suppresses the vibration of the valve core, making the movement of the valve core more stable.
[0036] When the guide part extends from the first section guide groove into the second section guide groove, the first sub-accommodating space and the third accommodating space are separated. At this time, the oil in the third accommodating space cannot flow into the first sub-accommodating space, and the movement of the valve core is limited, thereby avoiding the problem of pressure build-up caused by the valve core blocking the oil inlet hole due to excessive movement. At the same time, the impact problem caused by solid limiting can also be avoided.
[0037] As a preferred solution of the overflow valve, the one end of the valve core provided with the guide part is circumferentially provided with several equalizing grooves.
[0038] The equalizing grooves are arranged to balance the radial force of the valve core, avoiding the motion of the valve core from being stuck.
[0039] As a preferred solution of the overflow valve, the connecting piece is adjustably arranged in the accommodating space along the axial direction of the valve seat assembly, and the one end of the connecting piece away from the oil inlet hole extends out of the valve seat assembly.
[0040] The elastic assembly is arranged between the connecting piece and the one end of the valve core close to the oil inlet hole.
[0041] The connecting piece is adjustably arranged in the accommodating space along the axial direction of the valve seat assembly, and the elastic force of the elastic assembly pressing against the valve core can be adjusted by adjusting the position of the connecting piece, so as to adjust the pressure of the valve core opening the oil inlet hole.
[0042] The beneficial effects of the utility model are as follows:
[0043] The overflow valve provided by the utility model has the valve core movably arranged in the valve seat assembly along the axial part of the connecting piece, so that the valve core blocks or opens the oil inlet hole. The overflow valve comprises a guide part and a matching part, one of the guide part and the matching part is located at the valve core, the other of the guide part and the matching part is located at the connecting piece, the guide part and the matching part are in sliding cooperation, so that the valve core can be radially limited, the cavitation and flow separation caused by the large pressure drop at the oil inlet hole of the valve seat assembly are avoided, the unstable pressure caused by the vibration is avoided, and the shock absorption effect is achieved. BRIEF DESCRIPTION OF DRAWINGS
[0044] Figure 1 is the first structural schematic view of the overflow valve provided by the utility model;
[0045] Figure 2 is the second structural schematic view of the overflow valve provided by the utility model;
[0046] Figure 3 is the cross-sectional view along the A-A line in the Figure 2
[0047] Figure 4 is the cross-sectional view along the B-B line in the Figure 2
[0048] Figure 5 is the first structural schematic view of the connecting piece provided by the utility model;
[0049] Figure 6 is the second structure schematic view of the connecting piece provided by the utility model;
[0050] Figure 7 is the third structure schematic view of the connecting piece provided by the utility model;
[0051] Figure 8 is Figure 7 is the cross section view along the line C-C;
[0052] Figure 9 is the cross section view of the valve seat provided by the utility model;
[0053] Figure 10 is the structure schematic view of the valve core provided by the utility model.
[0054] in the figure:
[0055] 10, valve seat assembly;11, valve body;111, oil inlet hole;112, oil return hole;12, valve seat;120, valve seat guide groove;121, valve seat bottom wall part;1211, through hole;122, valve seat side wall part;131, first containing sub-space;132, second containing sub-space;
[0056] 20, connecting piece;21, connecting main body;211, containing groove;22, connecting rod;221, sliding groove;23, guide groove;231, first section guide groove;232, second section guide groove;
[0057] 30, valve core;31, guide part;32, pressure equalizing groove;
[0058] 40, elastic assembly;41, elastic piece;42, mounting seat;
[0059] 60, third containing space;70, locking piece. DETAILED DESCRIPTION
[0060] The utility model will be further explained in detail below in combination with the drawings and examples.It can be understood that the specific examples described here are only used to explain the utility model, and not limit the utility model.In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0061] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0062] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0063] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0064] A relief valve generally consists of a valve seat assembly and a valve core. The valve seat assembly has an oil inlet hole, and the valve core is axially positioned within the valve seat assembly to open or close the oil inlet hole. An elastic element is positioned between the end of the valve core facing away from the oil inlet hole and the valve seat assembly, driving the valve core to seal the oil inlet hole. The main problem with this structure is that when the oil inlet hole is open, the valve core is not radially constrained. Simultaneously, the large pressure drop at the oil inlet hole of the valve seat assembly easily leads to cavitation and flow separation, causing pressure instability and resulting in valve core vibration and significant noise.
[0065] To solve the above problems, such as Figures 1-4 As shown, this embodiment provides an overflow valve, including a valve seat assembly 10, a connector 20, and a valve core 30. The valve seat assembly 10 has a receiving space, and the valve seat assembly 10 has an oil inlet hole 111 and an oil return hole 112 communicating with the receiving space. At least a portion of the connector 20 is disposed within the receiving space, and the connector 20 is connected to the valve seat assembly 10. Along the axial direction of the connector 20, at least a portion of the valve core 30 is movably disposed within the valve seat assembly 10, so that the valve core 30 blocks or opens the oil inlet hole 111. The overflow valve includes a guide portion 31 and a mating portion. Along the axial direction of the connector 20, the guide portion 31 and the mating portion slide together. One of the guide portion 31 and the mating portion is located in the valve core 30, and the other of the guide portion 31 and the mating portion is located in the connector 20.
[0066] The spool 30 of the overflow valve is movably arranged in the valve seat assembly 10 along the axial portion of the connecting piece 20, so that the spool 30 can be radially limited, avoiding cavitation and flow separation due to large pressure drop at the oil inlet hole 111 of the valve seat assembly 10, avoiding pressure instability and vibration of the spool 30, and playing a role in shock absorption and noise reduction.
[0067] In this embodiment, the guide portion 31 is located at the end of the spool 30 away from the oil inlet hole 111, and the matching portion is located at the connecting piece 20. The guide portion 31 is located at the end of the spool 30 away from the oil inlet hole 111, so that the guide portion 31 has a better shock absorption and noise reduction effect on the spool 30. Preferably, along the radial direction of the connecting piece 20, the guide portion 31 protrudes relative to the spool 30, and the guide portion 31 and the spool 30 are an integral structure, which has a simple overall structure, reduces the number of parts, and reduces the steps of assembling the guide portion 31 and the spool 30. In other embodiments, the guide portion 31 can also be located at the connecting piece 20, and the matching portion can be located at the spool 30.
[0068] As shown in Figure 4 , the connecting piece 20 is provided with a sliding groove 221 along its axial direction, and the end of the spool 30 provided with the guide portion 31 is slidably arranged in the sliding groove 221, and the matching portion is a guide groove 23 arranged on the side wall of the sliding groove 221. The guide groove 23 has an opening on the outer side wall of the connecting piece 20, and the opening communicates with the accommodation space. The guide portion 31 extends into the guide groove 23 through the opening, and the guide portion 31 is slidably arranged in the guide groove 23 along the axial direction of the connecting piece 20. The spool 30 slides in the sliding groove 221 of the connecting piece 20, and the guide portion 31 slides along the guide groove 23, thereby guiding the movement of the spool 30 and preventing the spool 30 from moving in the radial direction. In this embodiment, along the circumferential direction of the connecting piece 20, the distance between the two opposite walls of the guide groove 23 is defined as L (see Figure 5 ), 0.5mm≤L≤1mm, for example, L can be: 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, etc.
[0069] Further, as shown in Figure 3 and Figure 4 , the connecting piece 20 is used to divide the accommodation space into a first accommodation sub-space 131 and a second accommodation sub-space 132, and the first accommodation sub-space 131 is located on the side of the connecting piece 20 away from the oil inlet hole 111; the spool 30 extends into the sliding groove 221 and forms a third accommodation space 60 between the wall of the sliding groove 221, and the guide groove 23 is deeper than the bottom surface of the first accommodation sub-space 131 along the axial direction of the connecting piece 20; the guide portion 31 moves along the guide groove 23 to communicate or cut off the communication between the first accommodation sub-space 131 and the third accommodation space 60 through the guide groove 23.
[0070] The guide part 31 moves along the guide groove 23 to connect the first containing sub-space 131 and the third containing space 60 through the guide groove 23, so that the gap between the third containing space 60 and the valve core 30 forms an oil film, which can inhibit the radial vibration of the valve core 30, and the damping effect formed by the viscous friction of the oil film during the movement of the valve core 30 inhibits the vibration to make the movement of the valve core 30 more stable; the guide groove 23 is deeper than the bottom surface of the first containing sub-space 131 along the axial direction of the connecting piece 20, so that the valve core 30 can cut off the connection between the first containing sub-space 131 and the third containing space 60, at this time, the oil in the third containing space 60 cannot flow into the first containing sub-space 131, and the movement of the valve core 30 is limited, so as to avoid the problem of pressure build-up caused by the valve core 30 blocking the oil inlet hole 111 due to the too large movement distance of the valve core 30; at the same time, the problem of impact caused by limiting through the solid limiting structure can also be avoided.
[0071] As shown in Figure 3 and Figure 4 , the valve seat assembly 10 includes a detachably connected valve body 11 and valve seat 12, and the valve seat assembly 10 is easy to disassemble. One end of the valve body 11 is provided with an oil inlet hole 111 and an oil return hole 112, and the other end of the valve body 11 is connected with the valve seat 12, and the first containing sub-space 131 is formed between the connecting piece 20 and the valve seat 12.
[0072] As shown in Figures 5-8 , the connecting piece 20 includes a connecting body 21 and a connecting rod 22, the connecting body 21 is provided with a containing groove 211, and the groove opening of the containing groove 211 is arranged towards the oil inlet hole 111; one end of the connecting rod 22 is connected with the connecting body 21, and the other end of the connecting rod 22 penetrates out of the valve seat 12, the connecting rod 22 is provided with a sliding groove 221 connected with the containing groove 211, the guide groove 23 extends from the groove bottom of the containing groove 211 to the connecting rod 22, and the guide groove 23 is deeper than the bottom surface of the first containing sub-space 131. The above structure of the connecting piece 20 is simple, can limit the radial movement of the valve core 30, and avoid the vibration of the valve core 30 in the radial direction; and can also limit the axial movement of the valve core 30, and avoid the phenomenon that the valve core 30 blocks the oil inlet hole 111 due to the too large movement distance of the valve core 30 in the axial direction.
[0073] As shown in Figure 9As shown, the valve seat 12 includes a valve seat bottom wall part 121 and a valve seat side wall part 122 arranged circumferentially on the valve seat bottom wall part 121, the valve seat bottom wall part 121 is connected with the valve seat side wall part 122 and encloses the valve seat guide groove 120, part of the connecting body 21 is arranged in the valve seat guide groove 120 and is sealed with the valve body 11 by a sealing element. The valve seat bottom wall part 121 is provided with a through hole 1211, the end of the connecting rod 22 away from the connecting body 21 is penetrated out of the through hole 1211, the guide groove 23 extends into the valve seat bottom wall part 121, the inner wall of the groove bottom of the valve seat guide groove 120 is used to separate the guide groove 23 into a first section guide groove 231 and a second section guide groove 232, the second section guide groove 232 is arranged on the side of the first section guide groove 231 away from the oil inlet hole 111; when the guide part 31 extends into the first section guide groove 231, the first containing sub-space 131 and the third containing space 60 are connected and communicated through the guide groove 23; when the guide part 31 extends into the second section guide groove 232 from the first section guide groove 231, the first containing sub-space 131 and the third containing space 60 are separated. The first section guide groove 231 and the second section guide groove 232 are separated by the inner wall of the groove bottom of the valve seat guide groove 120. When the position of the separation line changes, the first section guide groove 231 and the second section guide groove 232 also change accordingly.
[0074] When the valve core 30 moves along the axial direction of the valve seat assembly 10, when the guide part 31 extends into the first section guide groove 231, the first containing sub-space 131 and the third containing space 60 can be connected and communicated through the guide groove 23, at this time, the gap between the third containing space 60 and the valve core 30 forms an oil film, the damping effect formed by the viscous friction of the oil film during the movement of the valve core 30 inhibits the vibration of the valve core 30, so that the movement of the valve core 30 is more stable; when the guide part 31 extends into the second section guide groove 232 from the first section guide groove 231, the first containing sub-space 131 and the third containing space 60 are separated, at this time, the oil in the third containing space 60 cannot flow into the first containing sub-space 131, the movement of the valve core 30 is limited, thereby avoiding the problem of pressure build-up caused by the valve core 30 plugging the oil inlet hole 111 due to the excessive movement distance of the valve core 30; at the same time, the problem of impact caused by limiting by the solid limiting structure can also be avoided.
[0075] Optionally, as Figure 10As shown, the circumferential direction of the one end of the valve core 30 provided with the guide portion 31 is provided with several equalizing grooves 32. The arrangement of the equalizing grooves 32 can balance the radial force of the valve core 30, and avoid the jamming of the movement of the valve core 30. The circumferential direction of the one end of the valve core 30 provided with the guide portion 31 can be provided with one equalizing groove 32, or can be provided with a plurality of equalizing grooves 32, and the plurality of equalizing grooves 32 are arranged along the axial direction of the valve core 30, and the equalizing effect is improved by arranging the plurality of equalizing grooves 32. The number of the equalizing grooves 32 is arranged according to the demand, and is not specifically limited here. In the embodiment, the groove width of the equalizing groove 32 (the distance between the two opposite walls of the equalizing groove 32 along the axial direction of the valve core 30) is in the range of 0.2mm-0.5mm, for example, it can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.
[0076] Optionally, continuing to refer to Figure 10 , the valve core 30 is provided with at least two guide portions 31, and each guide portion 31 is arranged along the circumferential direction of the valve core 30; the connecting piece 20 is provided with at least two guide grooves 23, and each guide portion 31 is in sliding fit with one guide groove 23. The cooperation of the at least two guide portions 31 and the guide grooves 23 can make the movement of the valve core 30 more stable, and achieve better noise reduction effect. In the embodiment, the valve core 30 is provided with two guide portions 31, and the two guide portions 31 are arranged at equal intervals along the circumferential direction of the valve core 30, so that the movement of the valve core 30 is more stable. In other embodiments, the number of the guide portions 31 can also be three, four or more, and the number of the guide portions 31 is not specifically limited here, and can be adjusted according to the specific demand.
[0077] In the embodiment, the connecting piece 20 is adjustably arranged in the accommodating space along the axial direction of the valve seat assembly 10, and the one end of the connecting piece 20 away from the oil inlet hole 111 extends out of the valve seat assembly 10; and the elastic assembly 40 is arranged between the one end of the connecting piece 20 and the one end of the valve core 30 close to the oil inlet hole 111. The connecting piece 20 is adjustably arranged in the accommodating space along the axial direction of the valve seat assembly 10, and the position of the connecting piece 20 can be adjusted to adjust the elastic force of the elastic assembly 40 pressing against the valve core 30, and then the opening pressure of the valve core 30 opening the oil inlet hole 111 is adjusted.
[0078] It should be noted that: when the connecting piece 20 adjusts the elastic force of the elastic assembly 40 pressing against the valve core 30, the relative position of the valve seat 12 and the guide portion 31 will not be affected, so the axial limiting position of the valve core 30 will not change.
[0079] Specifically, the connecting body 21 of the connecting member 20 is screwed with the valve seat side wall part 122 of the valve seat 12, and the connecting body 21 is sealed with the valve body 11 by a sealing member. The connecting rod 22 is passed through the through hole 1211 of the valve seat 12 and locked by the locking member 70. In the embodiment, the locking member 70 is a nut, which is screwed on the connecting rod 22 and abuts against the valve seat 12. When adjusting the position of the connecting member 20, the nut is loosened, and the connecting member 20 is screwed to adjust the position of the connecting member 20, so as to adjust the elastic force of the elastic member 41 to the valve core 30.
[0080] As shown in Figure 3 and Figure 4 The elastic assembly 40 comprises the elastic member 41 and the mounting seat 42, the mounting seat 42 is arranged on the end of the valve core 30 close to the oil inlet hole 111, the elastic member 41 is sleeved on the valve core 30, one end of the elastic member 41 abuts against the mounting seat 42, and the other end of the elastic member 41 extends into the accommodating groove 211 of the connecting body 21 and abuts against the groove bottom of the accommodating groove 211. In the embodiment, the elastic member 41 is a spring, which is simple in structure and low in cost.
[0081] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. An overflow valve, characterized in that, include: A valve seat assembly (10) is provided with a receiving space therein, and an oil inlet (111) is provided on the valve seat assembly (10) that communicates with the receiving space. A connector (20), at least a portion of which is disposed within the receiving space, and which is connected to the valve seat assembly (10); A valve core (30) is movably disposed within the valve seat assembly (10) along the axial direction of the connector (20) to block or open the oil inlet (111). The overflow valve includes a guide portion (31) and a mating portion. The guide portion (31) and the mating portion slide in axial direction of the connector (20). One of the guide portion (31) and the mating portion is located in the valve core (30), and the other of the guide portion (31) and the mating portion is located in the connector (20).
2. The overflow valve according to claim 1, characterized in that, The guide portion (31) is located at the end of the valve core (30) away from the oil inlet (111), and the mating portion is located at the connector (20). Alternatively, the guide portion (31) is located on the connector (20), and the mating portion is located on the valve core (30).
3. The overflow valve according to claim 2, characterized in that, The connector (20) is provided with a slide groove (221) along its axial direction. One end of the valve core (30) is slidably disposed in the slide groove (221). The mating part is a guide groove (23) disposed on the side wall of the slide groove (221). The guide groove (23) has an opening on the outer side wall of the connector (20). The opening communicates with the receiving space. The guide part (31) extends into the guide groove (23) through the opening. Along the axial direction of the connector (20), the guide part (31) is slidably disposed in the guide groove (23).
4. The overflow valve according to claim 3, characterized in that, Along the radial direction of the connector (20), the guide portion (31) protrudes relative to the valve core (30), and the guide portion (31) and the valve core (30) are an integral structure.
5. The overflow valve according to claim 3, characterized in that, The connector (20) is used to divide the accommodating space into a first accommodating subspace (131) and a second accommodating subspace (132), wherein the first accommodating subspace (131) is located on the side of the connector (20) away from the oil inlet (111); The valve core (30) extends into the slide groove (221) and forms a third receiving space (60) between itself and the wall of the slide groove (221). The guide groove (23) is deeper than the bottom surface of the first receiving sub-space (131) along the axial direction of the connector (20). The guide portion (31) moves along the guide groove (23) to connect the first accommodating subspace (131) and the third accommodating space (60) through the guide groove (23), or to disconnect the connection between the first accommodating subspace (131) and the third accommodating space (60).
6. The overflow valve according to claim 3, characterized in that, Along the circumference of the connector (20), the distance between the two opposite walls of the guide groove (23) is defined as L, 0.5mm≤L≤1mm.
7. The overflow valve according to claim 5, characterized in that, The valve seat assembly (10) includes a detachably connected valve body (11) and valve seat (12). One end of the valve body (11) is provided with the oil inlet (111), and the other end of the valve body (11) is connected to the valve seat (12). The first accommodating subspace (131) is formed between the connector (20) and the valve seat (12).
8. The overflow valve according to claim 7, characterized in that, The connector (20) includes: The connecting body (21) is provided with a receiving groove (211), and the opening of the receiving groove (211) is oriented toward the oil inlet (111); A connecting rod (22) is provided, one end of which is connected to the connecting body (21), and the other end of which extends through the valve seat (12). The connecting rod (22) is provided with a sliding groove (221) that communicates with the receiving groove (211). The guide groove (23) extends from the bottom of the receiving groove (211) to the connecting rod (22).
9. The overflow valve according to claim 8, characterized in that, The valve seat (12) includes: The valve seat bottom wall (121) and the valve seat side wall (122) are arranged around the valve seat bottom wall (121). The valve seat bottom wall (121) and the valve seat side wall (122) are connected and form a valve seat guide groove (120). A part of the structure of the connecting body (21) is arranged in the valve seat guide groove (120). The valve seat bottom wall (121) is provided with a through hole (1211). The connecting rod (22) is located away from the valve seat bottom wall (121). One end of the connecting body (21) protrudes through the through hole (1211), the guide groove (23) extends into the bottom wall of the valve seat (121), and the inner wall of the bottom of the valve seat guide groove (120) is used to divide the guide groove (23) into a first guide groove (231) and a second guide groove (232). The second guide groove (232) is located on the side of the first guide groove (231) away from the oil inlet hole (111). When the guide portion (31) extends into the first guide groove (231), the first accommodating subspace (131) and the third accommodating space (60) are connected through the guide groove (23); When the guide portion (31) extends from the first guide groove (231) into the second guide groove (232), the first accommodating subspace (131) and the third accommodating space (60) are separated.
10. The relief valve according to any one of claims 2-7, characterized in that, The valve core (30) has a plurality of pressure equalization grooves (32) arranged circumferentially at one end where the guide portion (31) is provided.
11. The overflow valve according to any one of claims 1-7, characterized in that, The connector (20) is arbitrarily positioned within the receiving space along the axial direction of the valve seat assembly (10), and one end of the connector (20) facing away from the oil inlet (111) extends out of the valve seat assembly (10). An elastic component (40) is provided between the connector (20) and the valve core (30) at the end near the oil inlet (111).