Overflow valve

Abstract

The utility model belongs to the technical field of valves, and discloses an overflow valve. The overflow valve comprises a valve seat and a valve element assembly, an oil inlet and an oil return opening are formed in the valve seat, the valve element assembly is arranged in the valve seat in a sliding mode to adjust the communication state of the oil inlet and the oil return opening, an adjusting piece is installed at one end of the valve seat, a pressure adjusting spring is arranged outside the valve element assembly in a sleeving mode, one end of the pressure adjusting spring abuts against the valve element assembly, and the other end of the pressure adjusting spring abuts against the adjusting piece. The inerter comprises a lead screw, a flywheel and a ball, the lead screw is connected with the end, close to the adjusting part, of the valve element assembly, the flywheel is arranged outside the lead screw in a sleeving mode, at least part of the ball is arranged between the flywheel and the lead screw in a rolling mode, and linear motion of the lead screw can be converted into rotating motion of the flywheel through the ball. The overflow valve provided by the utility model has the functions of vibration and noise reduction, reduces friction force and energy loss, and prolongs the service life of the overflow valve.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a relief valve. Background Art

[0002] Relief valves are commonly used in hydraulic equipment, primarily for maintaining constant pressure and flow, stabilizing pressure, unloading the system, and providing safety protection. Existing relief valves primarily consist of a valve seat, a valve core, and a pressure-regulating spring. The valve core slides within the valve seat and compresses the pressure-regulating spring.

[0003] However, due to the constant change in pressure, the valve core will move continuously under the combined action of the hydraulic pressure and the pressure-regulating spring. When the excitation frequency of the oil pressure is close to the frequency of the valve core and spring system itself, resonance will occur. At this time, the valve core will continuously hit the valve port of the valve seat, generating vibration and noise. This frequent opening and closing will also cause the valve core and the valve seat to be subjected to high-frequency rigid impacts with each other, resulting in large wear and tear. At the same time, it will also reduce the reliability of the pressure-regulating spring, valve seat and valve core, thereby reducing the reliability and service life of the entire relief valve.

[0004] Therefore, it is urgent to provide a relief valve to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a relief valve, which has the function of reducing vibration and noise, and at the same time reduces friction, reduces energy loss, and prolongs the service life of the relief valve.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The overflow valve includes a valve seat and a valve core assembly, the valve seat is provided with an oil inlet and an oil return port, the valve core assembly is slidably arranged in the valve seat to adjust the communication state of the oil inlet and the oil return port, an adjustment seat is installed at one end of the valve seat, and a pressure-adjusting spring is provided on the outer sleeve of the valve core assembly, one end of the pressure-adjusting spring abuts the valve core assembly, and the other end abuts the adjustment seat, and also includes an inertia container, the inertia container includes a screw rod, a flywheel and a ball, the screw rod is connected to one end of the valve core assembly close to the adjustment seat, the flywheel is sleeved outside the screw rod, at least part of the ball is rolled between the flywheel and the screw rod, and the linear motion of the screw rod can be converted into rotational motion of the flywheel through the ball.

[0008] As an optional solution, an outer spiral groove is provided on the outer circumference of the screw rod, and an inner spiral groove is provided on the inner circumference of the flywheel. The inner spiral groove is at least partially opposite to the outer spiral groove and forms a spiral channel, and the ball is rolled in the spiral channel.

[0009] As an optional solution, the inertia container further includes a flywheel disc, which is sleeved outside the screw rod and fixedly connected to the adjustment seat. One end of the flywheel close to the valve core assembly is axially limited with the flywheel disc, and the other end of the flywheel is axially limited with the adjustment seat.

[0010] As an optional solution, a first outer ball is provided between one end of the flywheel close to the flywheel disc and the flywheel disc for rolling;

[0011] And / or, a second outer ball is provided for rolling between one end of the flywheel close to the adjustment seat and the adjustment seat.

[0012] As an optional solution, a first annular groove is formed on an end surface of the flywheel close to the flywheel disc, and a second annular groove is formed on the flywheel disc opposite to the first annular groove. The first annular groove and the second annular groove form a first annular raceway, and the first outer ball is rolled in the first annular raceway.

[0013] And / or, a third annular groove is provided on an end face of the flywheel close to the adjustment seat, a fourth annular groove opposite to the third annular groove is provided on the adjustment seat, the third annular groove and the fourth annular groove form a second annular raceway, and the second outer ball is rolled in the second annular raceway.

[0014] As an optional solution, a first accommodating groove is defined in the adjustment seat, the inner diameter of the first accommodating groove is larger than the outer diameter of the flywheel, and at least a portion of the flywheel is located in the first accommodating groove.

[0015] As an optional solution, a second accommodating groove is further provided in the adjustment seat. The second accommodating groove is located on the side of the first accommodating groove close to the valve core assembly and is coaxially connected to the first accommodating groove. The inner diameter of the second accommodating groove is greater than or equal to the inner diameter of the first accommodating groove, and at least part of the flywheel disc is located in the second accommodating groove.

[0016] As an optional solution, the valve core assembly includes a valve core body and a connecting rod, the valve core body is used to achieve communication or cutoff between the oil inlet and the oil return port, one end of the connecting rod is connected to the valve core body, and the other end of the connecting rod is connected to the screw rod.

[0017] As an optional solution, the valve core assembly also includes a spring seat, which is mounted on the outside of the valve core body. The adjustment seat is provided with an accommodating cavity near one end of the pressure-adjusting spring, one end of the pressure-adjusting spring rests on the spring seat, and the other end of the pressure-adjusting spring extends into the accommodating cavity and rests on the bottom of the accommodating cavity.

[0018] As an optional solution, the adjustment seat includes an end cover, an anti-slip component and a sealing component. At least part of the inertia container is located in the end cover, and at least part of the end cover is located in the valve seat. The sealing component is sleeved on the outside of the end cover, and along the radial direction of the valve seat, one side of the sealing component abuts the valve seat, and the other side of the sealing component abuts the end cover. At least part of the anti-slip component is located between the end cover and the valve seat, the anti-slip component is connected to the valve seat, and the anti-slip component is threadedly connected to the end cover to achieve adjustable axial position of the end cover.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a relief valve. When the hydraulic pressure drives the valve core assembly to move axially, the valve core assembly drives the screw rod to move. When the screw rod moves, multiple balls are rotated. The rolling of the balls drives the flywheel to rotate. The screw rod and the flywheel are in contact through the balls, and there is rolling friction between the two, thereby reducing friction and reducing energy loss. When the screw rod makes reciprocating motion in the axial direction, the flywheel does not undergo a large displacement in the axial direction. The main mode of movement is rotation. When the pressure regulating spring drives the valve core assembly to vibrate repeatedly, the inertia force of the flywheel generates a corresponding reaction force to offset the inertia force of the pressure regulating spring, thereby achieving the functions of vibration reduction, energy absorption, and noise reduction, and preventing the valve core assembly from repeatedly hitting the valve seat, thereby ensuring the reliability of the pressure regulating spring, valve seat, and valve core assembly, thereby improving the reliability and service life of the entire relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the overflow valve provided by the utility model;

[0022] Figure 2 It is a cross-sectional view of the relief valve provided by the utility model;

[0023] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0024] Figure 4 It is a cross-sectional view of the inertia container provided by the utility model;

[0025] Figure 5 This is a schematic diagram of the cooperation between the screw rod and the ball provided by the utility model;

[0026] Figure 6 This is a cross-sectional view of the inertia container provided by the utility model with the screw rod hidden.

[0027] In the picture:

[0028] 1. Valve seat; 11. Oil inlet; 12. Oil return port; 13. Abutment portion;

[0029] 2. Valve core assembly; 21. Valve core body; 211. Conical sealing surface; 22. Connecting rod; 23. Spring seat; 3. Pressure regulating spring;

[0030] 4. Adjustment seat; 41. Fourth annular groove; 42. First accommodating groove; 43. Second accommodating groove; 44. Accommodating cavity; 45. Penetration groove; 46. End cover; 47. Anti-slip member; 48. Sealing member; 49. Nut;

[0031] 5. Inertia container; 501. Spiral channel; 502. First annular raceway; 503. Second annular raceway; 51. Screw; 511. Outer spiral groove; 52. Flywheel; 521. Inner spiral groove; 522. First annular groove; 523. Third annular groove; 53. Ball; 54. Flywheel disc; 541. Second annular groove; 55. First outer ball; 56. Second outer ball. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0033] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, 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] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. 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 the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0036] like Figure 1 and Figure 2 As shown, this embodiment provides a relief valve, including a valve seat 1 and a valve core assembly 2. The valve seat 1 is provided with an oil inlet 11 and an oil return port 12. The valve core assembly 2 is slidably arranged in the valve seat 1 to adjust the communication state between the oil inlet 11 and the oil return port 12. An adjustment seat 4 is plugged and installed at one end of the valve seat 1. A pressure regulating spring 3 is provided on the outer sleeve of the valve core assembly 2. One end of the pressure regulating spring 3 abuts against the valve core assembly 2, and the other end abuts against the adjustment seat 4. Figure 1 As shown, the oil inlet 11 and the oil return port 12 are both opened on the peripheral side of the valve seat 1, and the oil inlet 11 and the oil return port 12 are both provided in plurality, and the plurality of oil inlet 11 and the plurality of oil return ports 12 are all spaced and evenly arranged around the circumference of the valve seat 1.

[0037] Combine Figure 2 , the hydraulic oil enters from the oil inlet 11 of the valve seat 1, and the liquid pressure acts on the valve core assembly 2 to the right. When the liquid pressure acting on the valve core assembly 2 is greater than the elastic force of the pressure regulating spring 3 (the relief valve tripping pressure), the valve core assembly 2 moves to the right to open the oil inlet 11. At this time, the oil inlet 11 and the oil return port 12 are connected, and the hydraulic oil entering from the oil inlet 11 flows out from the oil return port 12, causing the excess flow to overflow back to the oil tank, thereby playing a role in constant pressure and flow, pressure stabilization, system unloading and safety protection. When the liquid pressure acting on the valve core assembly 2 is less than the elastic force of the pressure regulating spring 3, the valve core assembly 2 moves to the left, cutting off the connection between the oil inlet 11 and the oil return port 12. When it is necessary to adjust the relief valve tripping pressure, change the depth of the adjusting seat 4 screwed into the valve seat 1 to change the length of the pressure regulating spring 3, so that the pressure regulating spring 3 is further compressed or relaxed, thereby changing the tripping pressure.

[0038] However, in the prior art, due to the continuous change of pressure, the valve core will move continuously under the combined action of the liquid pressure and the pressure-regulating spring 3. When the excitation frequency of the oil pressure is close to the frequency of the valve core plus spring system itself, resonance will occur. At this time, the valve core will continuously hit the valve port of the valve seat 1, generating vibration and noise. This frequent opening and closing will also cause the valve core and the valve seat 1 to be subjected to high-frequency rigid collisions with each other, resulting in large wear and tear. At the same time, it will also reduce the reliability of the pressure-regulating spring 3, the valve seat 1 and the valve core, thereby reducing the reliability and service life of the entire relief valve.

[0039] In order to solve the above problems, Figure 2 and Figure 3 As shown, the relief valve provided in this embodiment also includes an inertia chamber 5, which includes a screw 51, a flywheel 52, and a ball 53. The screw 51 is connected to the end of the valve core assembly 2 near the adjustment seat 4. The flywheel 52 is axially fixed within the adjustment seat 4 and sleeved around the screw 51. At least a portion of the ball 53 rolls between the flywheel 52 and the screw 51. The linear motion of the screw 51 can be converted into rotational motion of the flywheel 52 by the ball 53. The number of balls 53 is not specifically limited here.

[0040] When the hydraulic pressure drives the valve core assembly 2 to move axially, the valve core assembly 2 drives the screw rod 51 to move. When the screw rod 51 moves, the multiple balls 53 rotate. The rolling of the balls 53 drives the flywheel 52 to rotate. The screw rod 51 and the flywheel 52 are in contact through the balls 53, and there is rolling friction between the two, thereby reducing friction and energy loss. When the screw rod 51 reciprocates in the axial direction, the flywheel 52 does not undergo a large axial displacement. The main movement mode is rotation. When the pressure regulating spring 3 drives the valve core assembly 2 to vibrate repeatedly, the inertia force of the flywheel 52 generates a corresponding reaction force, thereby offsetting the inertia force of the pressure regulating spring 3, achieving the functions of vibration reduction, energy absorption, and noise reduction, and preventing the valve core assembly 2 from repeatedly hitting the valve seat 1, thereby ensuring the reliability of the pressure regulating spring 3, the valve seat 1, and the valve core assembly 2, thereby improving the reliability and service life of the entire relief valve.

[0041] In this embodiment, the medium introduced into the relief valve is engine oil. Engine oil has its own lubricating effect, so there is no need to disassemble the inertia container 5 or install an oil pouring hole on the valve seat 1. The engine oil can circulate inside the relief valve, thereby lubricating the inertia container 5 and extending the service life of the structure.

[0042] Furthermore, if Figures 4 to 6 As shown, an outer spiral groove 511 is formed on the outer circumference of the screw rod 51, and an inner spiral groove 521 is formed on the inner circumference of the flywheel 52. The axial length of the outer spiral groove 511 is greater than the axial length of the inner spiral groove 521. The inner spiral groove 521 and the outer spiral groove 511 are at least partially opposite to each other and form a spiral channel 501. A plurality of balls 53 are rollingly arranged in the spiral channel 501. Specifically, the inner spiral groove 521 and the outer spiral groove 511 both have a substantially semicircular cross-section. When the screw rod 51 is inserted into the flywheel 52, the inner spiral groove 521 and the corresponding portion of the outer spiral groove 511 form a spiral channel 501 with a circular cross-section. In addition, the plurality of balls 53 circulate along the spiral channel 501 in a rolling motion, ensuring the stability and reliability of the movement of the balls 53. Ultimately, the linear motion of the screw rod 51 is converted into the rotational motion of the flywheel 52, thereby reducing the friction during the rotation of the flywheel 52.

[0043] Furthermore, if Figure 3 As shown, the inertia container 5 also includes a flywheel disc 54, which is sleeved around the screw 51 and fixedly connected to the adjustment seat 4. The end of the flywheel 52 closest to the valve core assembly 2 is axially limited by the flywheel disc 54, while the other end of the flywheel 52 is axially limited by the adjustment seat 4. The flywheel 52 is limited at both ends by the flywheel disc 54 and the adjustment seat 4, respectively, ensuring that the flywheel 52's primary motion is rotational and prevents axial displacement, and preventing the flywheel 52 from separating from the screw 51.

[0044] In an optional embodiment, if Figure 3 and Figure 4 As shown, a circle of first outer balls 55 is disposed between the flywheel 52 and the flywheel disc 54 at one end of the flywheel 52 closest to the flywheel disc 54. A slight gap may exist between the flywheel 52 and the flywheel disc 54. When the flywheel 52 rotates, the flywheel 52 and the flywheel disc 54 come into contact via the first outer balls 55, and sliding friction between the two is converted to rolling friction, thereby reducing friction, lowering energy loss, and achieving a secondary vibration reduction effect.

[0045] Specifically, if Figure 4 As shown, a first annular groove 522 is defined on one end surface of the flywheel 52 near the flywheel disc 54, and a second annular groove 541 is defined on the flywheel disc 54, opposite to the first annular groove 522. The first annular groove 522 and the second annular groove 541 form a first annular raceway 502, in which the first outer ball 55 rolls. Specifically, the first annular groove 522 and the second annular groove 541 both have semicircular cross-sections. When the flywheel 52 and the flywheel disc 54 are mated, the first annular groove 522 and the second annular groove 541 form the first annular raceway 502, which has a circular cross-section. When the flywheel 52 rotates, the first outer ball 55 circulates along the first annular raceway 502 in a rolling motion, ensuring the stability and reliability of the movement of the first outer ball 55 and converting the sliding friction between the flywheel 52 and the flywheel disc 54 into rolling friction, thereby reducing the friction during the rotation of the flywheel 52.

[0046] In an optional embodiment, if Figure 3 and Figure 4 As shown, a circle of second outer balls 56 are disposed rollingly between the end of the flywheel 52 closest to the adjustment seat 4 and the adjustment seat 4. A slight gap may exist between the axial end surface of the flywheel 52 and the adjustment seat 4. When the flywheel 52 rotates, the flywheel 52 and the adjustment seat 4 contact each other via the second outer balls 56, and sliding friction between the two is converted to rolling friction, thereby reducing friction, lowering energy loss, and achieving a secondary vibration reduction effect.

[0047] Specifically, if Figure 3 and Figure 4As shown, a third annular groove 523 is defined on one end surface of the flywheel 52 near the adjustment seat 4, and a fourth annular groove 41 is defined on the adjustment seat 4, opposite to the third annular groove 523. The third annular groove 523 and the fourth annular groove 41 form a second annular raceway 503, in which the second outer ball 56 rolls. Specifically, the third annular groove 523 and the fourth annular groove 41 both have semicircular cross-sections. When the flywheel 52 is mated with the adjustment seat 4, the third annular groove 523 and the fourth annular groove 41 form a second annular raceway 503 having a circular cross-section. When the flywheel 52 rotates, the second outer ball 56 circulates along the second annular raceway 503 in a rolling motion, ensuring the stability and reliability of the movement of the second outer ball 56 and converting the sliding friction between the flywheel 52 and the adjustment seat 4 into rolling friction, thereby reducing the friction during the rotation of the flywheel 52.

[0048] Further, if Figure 3 As shown, a first accommodating groove 42 is defined within the adjustment seat 4. The inner diameter of the first accommodating groove 42 is larger than the outer diameter of the flywheel 52, ensuring that the flywheel 52 can rotate freely. At least a portion of the flywheel 52 is located within the first accommodating groove 42. This reduces the axial dimension of the entire relief valve, facilitating product miniaturization. In this embodiment, the flywheel 52 is completely located within the first accommodating groove 42, and the fourth annular groove 41 is defined at the bottom of the first accommodating groove 42, thereby reducing the axial dimension of the entire relief valve. In other optional embodiments, the flywheel 52 may also be partially located within the first accommodating groove 42, which may also reduce the axial dimension of the entire relief valve to a certain extent.

[0049] Further, if Figure 3 As shown, a second accommodating groove 43 is further provided in the adjustment seat 4. The second accommodating groove 43 is located on the side of the first accommodating groove 42 close to the valve core assembly 2 and is coaxially connected to the first accommodating groove 42. The inner diameter of the second accommodating groove 43 is greater than or equal to the inner diameter of the first accommodating groove 42, and at least a portion of the flywheel disc 54 is located in the second accommodating groove 43. This arrangement can further reduce the axial dimension of the entire relief valve, which is conducive to the miniaturization of the product. In this embodiment, the flywheel disc 54 is completely located in the second accommodating groove 43, thereby further reducing the axial dimension of the entire relief valve. In other optional embodiments, the flywheel disc 54 can also be partially located in the second accommodating groove 43, which can also reduce the axial dimension of the entire relief valve to a certain extent.

[0050] Alternatively, the flywheel disc 54 may be secured within the second receiving groove 43 by threaded connection, snap-fit ​​connection, or interference fit. In this embodiment, because the outer diameter of the flywheel disc 54 is greater than the outer diameter of the flywheel 52, the inner diameter of the second receiving groove 43 is greater than the inner diameter of the first receiving groove 42. In other optional embodiments, when the outer diameter of the flywheel disc 54 is equal to the outer diameter of the flywheel 52, the inner diameter of the second receiving groove 43 may also be equal to the inner diameter of the first receiving groove 42. This is not specifically limited herein.

[0051] Furthermore, if Figure 3 As shown, a penetration groove 45 is further formed at the bottom of the first accommodating groove 42 , and the inner diameter of the penetration groove 45 is adapted to the outer diameter of the screw rod 51 , so that the screw rod 51 can move freely into the penetration groove 45 without affecting the movement of the screw rod 51 .

[0052] like Figure 2 As shown, the valve core assembly 2 includes a valve core body 21 and a connecting rod 22. The valve core body 21 is used to achieve connection or cutoff between the oil inlet 11 and the oil return port 12. One end of the connecting rod 22 is connected to the valve core body 21, and the other end of the connecting rod 22 is connected to the screw rod 51. The hydraulic force and the elastic force of the pressure-regulating spring 3 act on the valve core body 21, driving the valve core body 21 to move axially. When the valve core body 21 moves axially, the valve core body 21 drives the connecting rod 22 to move, and the connecting rod 22 drives the screw rod 51 to move. The connecting rod 22 and the valve core body 21 are processed separately and then connected to form a whole, which facilitates the processing of the connecting rod 22 and the valve core body 21. Optionally, the connecting rod 22 and the valve core body 21, as well as the connecting rod 22 and the screw rod 51, can be detachably connected by means of threaded connection, snap connection, etc., which are not specifically limited here.

[0053] Specifically, if Figure 2 As shown, the valve seat 1 is provided with an abutment portion 13 having a right-angle structure, and the valve core body 21 is formed with a tapered sealing surface 211. When the tapered sealing surface 211 abuts the abutment portion 13, the oil inlet 11 and the oil return port 12 are disconnected. The seal between the tapered sealing surface 211 and the abutment portion 13 is a line contact seal formed by the annular line and the tapered surface, which has a good sealing effect.

[0054] Furthermore, if Figure 2 As shown, the valve core assembly 2 also includes a spring seat 23, which is fixedly mounted on the outside of the valve core body 21. The adjustment seat 4 is provided with a receiving cavity 44 at one end close to the pressure regulating spring 3. One end of the pressure regulating spring 3 abuts against the spring seat 23, and the other end of the pressure regulating spring 3 extends into the receiving cavity 44 and abuts against the bottom of the cavity 44. Figure 3As shown, along the axial direction of the adjustment seat 4, the accommodating cavity 44, the second accommodating groove 43, the first accommodating groove 42, and the perforating groove 45 are sequentially connected, forming a stepped hole with a successively decreasing inner diameter. The elastic force of the pressure-regulating spring 3 can act on the valve core body 21 via the spring seat 23, and a portion of the pressure-regulating spring 3 is located within the accommodating cavity 44, thereby further reducing the axial dimension of the relief valve and facilitating product miniaturization.

[0055] Further, if Figure 1 and Figure 2 As shown, the regulating seat 4 includes an end cap 46, an anti-slip member 47 and a sealing member 48. At least part of the inertia container 5 is located in the end cap 46, and at least part of the end cap 46 is located in the valve seat 1. The sealing member 48 is sleeved outside the end cap 46, and along the radial direction of the valve seat 1, one side of the sealing member 48 abuts the valve seat 1, and the other side of the sealing member 48 abuts the end cap 46, achieving a good sealing effect. Among them, the sealing member 48 can be an O-ring. Figure 3 As shown, the aforementioned accommodating cavity 44 , the second accommodating groove 43 , the first accommodating groove 42 and the penetration groove 45 are all opened in the end cover 46 .

[0056] At least part of the anti-slip component 47 is located between the end cover 46 and the valve seat 1. The outer ring of the anti-slip component 47 and the valve seat 1 can be optionally connected by threaded connection, interference fit or through a wire retaining ring. The inner ring of the anti-slip component 47 is threadedly connected to the end cover 46 to achieve adjustable axial position of the end cover 46, which is convenient for adjusting the depth of the end cover 46 screwed into the valve seat 1 to change the length of the pressure-regulating spring 3, thereby changing the starting pressure of the relief valve.

[0057] Further, if Figure 1 and Figure 2 As shown, the adjustment seat 4 further includes a nut 49, which is threadedly mounted on the anti-slip member 47 and abuts against the outer end of the anti-slip member 47 to further prevent loosening.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A relief valve, comprising a valve seat (1) and a valve core assembly (2), wherein the valve seat (1) is provided with an oil inlet (11) and an oil return port (12), and the valve core assembly (2) is slidably arranged in the valve seat (1) to adjust the communication state between the oil inlet (11) and the oil return port (12), an adjustment seat (4) is installed at one end of the valve seat (1), and a pressure regulating spring (3) is provided on the outer sleeve of the valve core assembly (2), one end of the pressure regulating spring (3) abuts against the valve core assembly (2), and the other end abuts against the adjustment seat (4), characterized in that: The inertia container (5) further comprises a screw rod (51), a flywheel (52) and a ball (53), wherein the screw rod (51) is connected to one end of the valve core assembly (2) close to the adjustment seat (4), the flywheel (52) is sleeved outside the screw rod (51), and at least a portion of the ball (53) is rolled between the flywheel (52) and the screw rod (51), and the linear motion of the screw rod (51) can be converted into the rotational motion of the flywheel (52) through the ball (53).

2. The relief valve according to claim 1, characterized in that An outer spiral groove (511) is provided on the outer circumferential surface of the screw rod (51), and an inner spiral groove (521) is provided on the inner circumferential surface of the flywheel (52). The inner spiral groove (521) and the outer spiral groove (511) are at least partially opposite to each other and form a spiral channel (501). The ball (53) is rollingly arranged in the spiral channel (501).

3. The relief valve according to claim 1, characterized in that The inertia container (5) further comprises a flywheel disc (54), which is sleeved outside the screw rod (51) and fixedly connected to the adjustment seat (4); one end of the flywheel (52) close to the valve core assembly (2) is axially limited in cooperation with the flywheel disc (54), and the other end of the flywheel (52) is axially limited in cooperation with the adjustment seat (4).

4. The relief valve according to claim 3, characterized in that A first outer ball (55) is provided between one end of the flywheel (52) close to the flywheel disc (54) and the flywheel disc (54). And / or, a second outer ball (56) is provided rollingly between one end of the flywheel (52) close to the adjustment seat (4) and the adjustment seat (4).

5. The relief valve according to claim 4, characterized in that: The flywheel (52) is provided with a first annular groove (522) on one end surface close to the flywheel disc (54), and the flywheel disc (54) is provided with a second annular groove (541) opposite to the first annular groove (522). The first annular groove (522) and the second annular groove (541) form a first annular raceway (502), and the first outer ball (55) is rolled in the first annular raceway (502); And / or, a third annular groove (523) is provided on an end surface of the flywheel (52) close to the adjustment seat (4), a fourth annular groove (41) opposite to the third annular groove (523) is provided on the adjustment seat (4), the third annular groove (523) and the fourth annular groove (41) form a second annular raceway (503), and the second outer ball (56) is rollingly arranged in the second annular raceway (503).

6. The relief valve according to claim 3, characterized in that A first accommodating groove (42) is provided in the adjustment seat (4), the inner diameter of the first accommodating groove (42) is larger than the outer diameter of the flywheel (52), and at least a portion of the flywheel (52) is located in the first accommodating groove (42).

7. The relief valve according to claim 6, characterized in that A second accommodating groove (43) is further provided in the adjusting seat (4). The second accommodating groove (43) is located on a side of the first accommodating groove (42) close to the valve core assembly (2) and is coaxially connected to the first accommodating groove (42). The inner diameter of the second accommodating groove (43) is greater than or equal to the inner diameter of the first accommodating groove (42). At least a portion of the flywheel disc (54) is located in the second accommodating groove (43).

8. The relief valve according to any one of claims 1 to 7, characterized in that: The valve core assembly (2) comprises a valve core body (21) and a connecting rod (22). The valve core body (21) is used to achieve communication or cutoff between the oil inlet (11) and the oil return port (12). One end of the connecting rod (22) is connected to the valve core body (21), and the other end of the connecting rod (22) is connected to the screw rod (51).

9. The relief valve according to claim 8, characterized in that The valve core assembly (2) further includes a spring seat (23), the spring seat (23) being mounted on the outside of the valve core body (21), the regulating seat (4) being provided with a receiving cavity (44) at one end close to the pressure regulating spring (3), one end of the pressure regulating spring (3) being against the spring seat (23), and the other end of the pressure regulating spring (3) extending into the receiving cavity (44) and being against the bottom of the receiving cavity (44).

10. The relief valve according to any one of claims 1 to 7, characterized in that: The adjustment seat (4) includes an end cover (46), an anti-slip component (47) and a sealing component (48). At least a portion of the inertial container (5) is located in the end cover (46), and at least a portion of the end cover (46) is located in the valve seat (1). The sealing component (48) is sleeved on the outside of the end cover (46), and along the radial direction of the valve seat (1), one side of the sealing component (48) abuts the valve seat (1), and the other side of the sealing component (48) abuts the end cover (46). At least a portion of the anti-slip component (47) is located between the end cover (46) and the valve seat (1). The anti-slip component (47) is connected to the valve seat (1), and the anti-slip component (47) is threadedly connected to the end cover (46) to achieve adjustable axial position of the end cover (46).

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