Valve core structure and balancing valve

Abstract

The present invention discloses a valve core structure and a balancing valve, which relate to the field of valve technology. The valve core structure includes a valve core body, a connecting rod and a damping tail arranged in sequence along the axial direction. One axial end of the connecting rod is connected to one axial end of the valve core body, and the other axial end of the connecting rod is connected to the middle of an axial end face of the damping tail. The outer peripheral portion of the damping tail protrudes radially relative to the connecting rod, and the outer peripheral surface of the damping tail is provided with an axial groove running through the axial direction. Since the middle part of the damping tail is connected to the connecting rod, and the outer peripheral portion of the damping tail protrudes radially relative to the connecting rod, the outer peripheral portion forms a shoulder structure relative to the connecting rod. Since the axial groove is provided on the outer peripheral surface of the damping tail, the fluid flowing upstream toward the damping tail can continue to flow downstream through the axial groove, reducing or avoiding the impact of the outer peripheral portion on the fluid, reducing or eliminating the vortex backflow at the damping tail, ensuring the stability of the liquid flow, and facilitating the suppression of the fluid self-oscillation phenomenon and whistling noise.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a valve core structure and a balancing valve. Background Art

[0002] In a balancing valve, the damping tail structure at the tail of the valve core can change the direction of the steady-state fluid force of the downstream cone valve, making the fluid flow at the valve core valve port similar to the fluid flow at the slide valve port. There is a steady-state fluid force that causes the valve port to tend to close, thereby reducing the inertial vibration caused by the mismatch of the valve port flow dynamics model parameters.

[0003] However, when the fluid jet ejected from the throttle port of this valve core reaches the downstream damping tail shoulder, it is very easy to generate vortexes due to the edge shearing of the damping tail shoulder, affecting the smoothness of the liquid flow.

[0004] Therefore, how to reduce or eliminate the vortex at the damping tail and improve the smoothness of the liquid flow is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a valve core structure and a balancing valve, which can reduce or eliminate the vortex at the damping tail and improve the stability of the liquid flow.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A valve core structure comprises a valve core body, a connecting rod and a damping tail arranged in sequence along the axial direction; one axial end of the connecting rod is connected to one axial end of the valve core body, and the other axial end of the connecting rod is connected to the middle part of an axial end face of the damping tail; the outer peripheral portion of the damping tail protrudes radially relative to the connecting rod, and the outer peripheral surface of the damping tail is provided with an axial groove running through the axial direction.

[0008] Preferably, a plurality of the axial grooves are evenly arranged on the outer peripheral surface of the vibration damping tail along the circumferential direction.

[0009] Preferably, a flow-around boss is provided at the bottom of the axial groove, the flow-around boss is radially protruding relative to the connecting rod, and the flow-around boss is radially recessed into the axial groove; the end of the flow-around boss close to the valve core body in the axial direction is a first arc-shaped surface.

[0010] Preferably, the flow-around boss is radially protruding relative to the connecting rod, and a portion of the outer circumferential surface of the connecting rod close to the flow-around boss is a second arc-shaped surface that smoothly transitions to the flow-around boss.

[0011] Preferably, a throttle port is provided on the outer peripheral surface of one end of the valve core body close to the connecting rod; the throttle port includes a first throttle port, and the first throttle port is provided in a one-to-one correspondence with the axial groove; wherein, for the corresponding first throttle port and the axial groove, the radial center plane of the first throttle port and the radial center plane of the axial groove are provided in the same plane.

[0012] Preferably, the circumferential width of the axial groove is greater than the circumferential width of the corresponding first throttle opening.

[0013] Preferably, the circumferential width of the axial groove is 1.1 to 1.4 times the circumferential width of the corresponding first throttle opening.

[0014] Preferably, the groove bottom of the first throttle port includes a first side surface and a second side surface sequentially arranged along the axial direction and close to the connecting rod, and the first side surface is inclined relative to the second side surface so that the first throttle port constitutes a V-shaped throttle port.

[0015] Preferably, the throttle port further includes a second throttle port, and in the circumferential direction, the first throttle port and the second throttle port are alternately arranged; the second throttle port is a cylindrical throttle port.

[0016] A balancing valve includes the valve core structure as described above, and also includes a valve body and a valve seat; the valve seat is installed inside the valve body, and the valve core structure is installed inside the valve seat, and the valve core structure and the valve seat form a sliding fit; a first oil port and a second oil port are arranged in sequence along the axial direction on the side wall of the valve body, the first oil port is close to the damping tail, and the second oil port is close to the valve core body.

[0017] The valve core structure provided by the present invention comprises a valve core body, a connecting rod, and a damping tail arranged in sequence along the axial direction. One axial end of the connecting rod is connected to one axial end of the valve core body, and the other axial end of the connecting rod is connected to the middle portion of an axial end surface of the damping tail. The outer circumference of the damping tail protrudes radially relative to the connecting rod and is provided with an axial groove extending axially through the outer circumference of the damping tail.

[0018] Because the middle portion of the damper tail is connected to the connecting rod, and the outer peripheral portion of the damper tail protrudes radially relative to the connecting rod, the outer peripheral portion forms a shoulder structure relative to the connecting rod. Because an axial groove is provided on the outer peripheral surface of the damper tail, and the axial groove is arranged to penetrate the axial direction, the side surface of the shoulder structure close to the connecting rod is also penetrated by the axial groove. The fluid flowing from the upstream of the damper tail toward the damper tail can continue to flow downstream through the axial groove, reducing or avoiding the impact of the outer peripheral portion of the damper tail on the fluid, reducing or eliminating vortex backflow at the damper tail, ensuring the smoothness of the liquid flow, and avoiding the vortex turbulence phase matching at the two end positions between the throttle port on the valve core body and the damper tail shoulder, thereby suppressing the self-excited oscillation phenomenon of the fluid and thus suppressing the howling noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 This is an oblique isometric view of the first embodiment of the valve core structure provided by the present invention;

[0021] Figure 2 for Figure 1 A cross-sectional view parallel to the axial direction;

[0022] Figure 3 for Figure 2 A magnified view of point A;

[0023] Figure 4 for Figure 2 Left side view of the center throttle position;

[0024] Figure 5 A partial cross-sectional view parallel to the axial direction of the first embodiment of the balancing valve provided by the present invention;

[0025] Figure 6 for Figure 5 Working principle diagram of the balancing valve.

[0026] Reference numerals:

[0027] The damper tail 1, the peripheral portion 11, the outer peripheral surface 12 of the damper tail, and the axial groove 13;

[0028] Flow-around boss 2, first arc-shaped surface 21;

[0029] Connecting rod 3, second arcuate surface 31;

[0030] Valve core body 4, throttle port 41, cylindrical throttle port 411, V-shaped throttle port 412;

[0031] Valve seat 5;

[0032] Valve body 6 , first oil port 61 , second oil port 62 . DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The core of the present invention is to provide a valve core structure and a balancing valve, which can reduce or eliminate the vortex at the damping tail and improve the stability of the liquid flow.

[0035] The valve core structure provided by the present invention can be applied to a balancing valve. Figures 1 to 6 , including a valve core body 4, a connecting rod 3 and a damping tail 1 arranged in sequence along the axial direction. Specifically, the three can be an integrally formed structure.

[0036] One axial end of the connecting rod 3 is connected to one axial end of the valve core body 4, and the other axial end of the connecting rod 3 is connected to the middle portion of one axial end surface of the damper tail 1. The outer peripheral portion 11 of the damper tail 1 radially protrudes relative to the connecting rod 3, and the outer peripheral surface 12 of the damper tail 1 is defined by an axial groove 13 extending axially therethrough. The outer peripheral portion 11 is an annular structure, and its outer peripheral surface corresponds to the outer peripheral surface 12 of the damper tail 1. The middle portion of the damper tail 1 axially away from one end of the connecting rod 3 can be a plane perpendicular to the centerline of the valve core structure.

[0037] In this embodiment, since the middle portion of the damping tail is connected to the connecting rod 3, the outer peripheral portion 11 of the damping tail protrudes radially relative to the connecting rod 3, so that the outer peripheral portion 11 forms a shoulder structure relative to the connecting rod 3. Figure 6 As shown, since the axial groove 13 is provided on the outer peripheral surface 12 of the damping tail 1, and the axial groove 13 is arranged to penetrate along the axial direction, the shoulder structure is close to the side surface of the connecting rod 3 (i.e. Figure 6 The right end face of the middle outer shaft portion is also penetrated by the axial groove 13. The fluid flowing from the upstream of the damper tail 1 toward the damper tail 1 can continue to flow downstream through the axial groove 13, reducing or avoiding the impact of the peripheral portion 11 on the fluid, reducing or eliminating the vortex backflow at the damper tail 1, ensuring the stability of the liquid flow, and avoiding the vortex turbulence phase pairing at the two end positions between the throttle port 41 on the valve core body 4 and the shoulder of the damper tail 1, thereby suppressing the self-excited oscillation phenomenon of the fluid and thus suppressing the howling noise.

[0038] Furthermore, if Figure 1 As shown, a plurality of axial grooves 13 are evenly arranged on the outer peripheral surface 12 of the damper tail 1 along the circumferential direction, which can further ensure the effect of eliminating vortices.

[0039] Furthermore, if Figure 2 and Figure 3As shown, a flow-through boss 2 is provided at the bottom of the axial groove 13. The flow-through boss 2 is provided to protrude radially relative to the connecting rod 3, and the flow-through boss 2 is radially recessed into the axial groove 13. The end of the flow-through boss 2 axially close to the valve core body 4 is a first arcuate surface 21, and the bottom of the axial groove 13 specifically transitions to the radial outer end surface of the flow-through boss 2 through the first arcuate surface 21. Specifically, when setting the height of the flow-through boss 2 protruding radially from the connecting rod 3, the thickness of the jet ejected from the upstream throttle port 41 should also be considered. Specifically, the height is greater than the thickness of the jet ejected from the upstream throttle port 41.

[0040] By setting the flow-around boss 2, when the fluid enters the axial groove 13, it can be smoothly guided by the first arc-shaped surface 21 on the flow-around boss 2, further avoiding the edge shearing effect of the vibration-damping tail 1 on the upstream fluid, and further ensuring the suppression effect of the fluid self-oscillation phenomenon and fluid self-excited whistling.

[0041] Further, if Figure 3 As shown, the flow-around boss 2 is radially protruding relative to the connecting rod 3, and the portion of the outer peripheral surface of the connecting rod 3 close to the flow-around boss 2 is a second arc-shaped surface 31 that smoothly transitions with the flow-around boss 2, further improving the smoothness of the transition of the fluid at the docking position between the connecting rod 3 and the flow-around boss 2.

[0042] Further, if Figure 1 and Figure 2 As shown, a throttle port 41 is provided on the outer peripheral surface of one end of the valve core body 4 close to the connecting rod 3. The throttle port 41 includes a first throttle port, and the first throttle port is provided in a one-to-one correspondence with the axial groove 13.

[0043] Among them, for the corresponding first throttle port and axial groove 13, the radial center plane of the first throttle port and the radial center plane of the axial groove 13 are arranged in the same plane. The throttle port 41 is specifically arranged on the shoulder of the end of the valve core axially close to the connecting rod 3. Specifically, the radial center plane of the first throttle port refers to the center plane of the axis of the first radial throttle port 41 passing through the valve core structure, and the radial center plane of the axial groove 13 refers to the center plane of the axis of the axial groove 13 passing through the valve core structure, as shown in FIG. Figure 5 As shown, the cross section is a cross section on the radial center plane of a first throttle opening.

[0044] By arranging the first throttle opening and the axial groove 13 in a one-to-one correspondence, it can be ensured that the fluid flowing out of the first throttle opening can mainly flow into the axial groove 13, thereby reducing the resistance encountered during this flow process.

[0045] Furthermore, the circumferential width of the axial groove 13 is greater than the circumferential width of the corresponding first throttle opening. More specifically, the circumferential width of the axial groove 13 is 1.1 to 1.4 times the circumferential width of the corresponding first throttle opening. Due to turbulent pulsation, the jet cross-section continuously increases when the oil is ejected from the throttle opening 41. By setting the axial width of the axial groove 13 to be greater than the circumferential width of the corresponding throttle opening 41, the width variation trend of the oil can be adapted, thereby further ensuring the axial groove 13's avoidance effect on its upstream fluid, more effectively suppressing the phenomenon of vortex formation caused by the increased jet cross-section impacting the damping tail 1, and achieving the suppression of the fluid's self-excited oscillation phenomenon.

[0046] Among them, the circumferential width and other dimensions of the axial groove 13 and the dimensions of each part of the flow-around boss 2 can be adaptively adjusted and set according to needs during the processing.

[0047] Furthermore, the groove bottom of the first throttle opening includes a first side surface and a second side surface, which are sequentially arranged along the axial direction and in a direction close to the connecting rod 3. The first side surface is inclined relative to the second side surface, so that the first throttle opening forms a V-shaped throttle opening 412. In actual use, the fluid flowing out of the V-shaped throttle opening 412 is more likely to form vortices at the damper tail 1. In this embodiment, the V-shaped throttle opening 412 is configured as the first throttle opening, which effectively solves the problem of shear vortices forming at the damper tail 1 when the fluid flowing out of the V-shaped throttle opening 412 flows.

[0048] Furthermore, if Figure 1 As shown, the throttle port 41 further includes a second throttle port. In the circumferential direction, the first throttle port and the second throttle port are staggered. The second throttle port is a cylindrical throttle port 411. By staggering the two throttle ports 41, the normal use requirements of the balancing valve can be met.

[0049] The valve core structure provided by the present invention, when applied to a hydraulic valve, has the effect of suppressing fluid self-excited howling, can avoid the jet acting on the damping tail 1 to form a shear vortex, and avoid the continuous fluid self-excited oscillation phenomenon formed by the vortex disturbance feedback to the upstream, thereby suppressing the howling noise.

[0050] In addition to the above-mentioned valve core structure, the present invention also provides a balancing valve, which includes a valve core structure, which can be specifically the valve core structure provided in any of the above embodiments. The beneficial effects can be referred to the above embodiments accordingly.

[0051] The balancing valve also includes a valve body 6 and a valve seat 5. The valve seat 5 is mounted within the valve body 6, and the valve core structure is mounted within the valve seat 5, forming a sliding fit with the valve core structure. A first oil port 61 and a second oil port 62 are axially arranged on the sidewall of the valve body 6. The first oil port 61 is located near the damper tail 1, and the second oil port 62 is located near the valve core body 4. Specifically, a stepped hole is provided within the valve body 6, allowing the stepped surface of the stepped hole to axially position the valve core body 4.

[0052] Due to the application of the valve core structure in the above embodiment, the self-excited whistling suppression effect of the fluid can be achieved. Figure 6 As shown, the working principle is as follows: the arrow indicates the direction of oil flow, the valve core structure moves to the right, so that the throttle port 41 opens, so that the oil flows in from the second oil port 62 of the valve body 6, passes through the throttle port 41 of the valve core body 4 and the axial groove 13 of the damping tail 1, and finally flows out from the first oil port 61 of the valve body 6.

[0053] For the structures of other parts of the balancing valve, please refer to the prior art and will not be described in detail in this article.

[0054] It should be noted that when an element is referred to as being “fixed” to another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected” to another element, it may be directly connected to the other element or there may be an intermediate element.

[0055] Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features referred to.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The valve core structure and balancing valve provided by the present invention are described in detail above. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be noted that for those skilled in the art, various improvements and modifications can be made to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A valve core structure, characterized in that: The invention comprises a valve core body (4), a connecting rod (3) and a damping tail (1) which are sequentially arranged along the axial direction; one axial end of the connecting rod (3) is connected to one axial end of the valve core body (4), and the other axial end of the connecting rod (3) is connected to the middle of an axial end face of the damping tail (1); the outer peripheral portion (11) of the damping tail (1) protrudes radially relative to the connecting rod (3), and the outer peripheral surface (12) of the damping tail (1) is provided with an axial groove (13) which penetrates along the axial direction; a flow-through boss (2) is provided at the bottom of the axial groove (13), and the flow-through boss ( 2) is radially protruding relative to the connecting rod (3), and the flow-around boss (2) is radially recessed into the axial groove (13); the end of the flow-around boss (2) close to the valve core body (4) in the axial direction is a first arcuate surface (21), and the portion of the outer peripheral surface of the connecting rod (3) close to the flow-around boss (2) is a second arcuate surface (31) that smoothly transitions to the flow-around boss (2), the damping tail (1) is provided in the valve body (6), and at least part of the opening of the radial outer end of the axial groove (13) is separated from the valve body (6); A throttle port (41) is provided on the outer peripheral surface of one end of the valve core body (4) close to the connecting rod (3); the throttle port (41) includes a first throttle port, and the first throttle port is provided in a one-to-one correspondence with the axial groove (13); wherein, for the corresponding first throttle port and the axial groove (13), the radial center plane of the first throttle port and the radial center plane of the axial groove (13) are provided in the same plane.

2. The valve core structure according to claim 1, characterized in that: The plurality of axial grooves (13) are evenly arranged along the circumferential direction on the outer peripheral surface (12) of the vibration damping tail (1).

3. The valve core structure according to claim 1, characterized in that: The circumferential width of the axial groove (13) is greater than the circumferential width of the corresponding first throttle opening.

4. The valve core structure according to claim 3, characterized in that: The circumferential width of the axial groove (13) is 1.1 to 1.4 times the circumferential width of the corresponding first throttle opening.

5. The valve core structure according to claim 4, characterized in that: The groove bottom of the first throttle port comprises a first side surface and a second side surface sequentially arranged along the axial direction and close to the connecting rod (3), and the first side surface is inclined relative to the second side surface so that the first throttle port forms a V-shaped throttle port (412).

6. The valve core structure according to claim 5, characterized in that: The throttle opening (41) further includes a second throttle opening. In the circumferential direction, the first throttle opening and the second throttle opening are arranged alternately; the second throttle opening is a cylindrical throttle opening (411).

7. A balancing valve, characterized in that: The invention comprises a valve core structure as described in any one of claims 1 to 6, and further comprises a valve body (6) and a valve seat (5); the valve seat (5) is installed inside the valve body (6), and the valve core structure is installed inside the valve seat (5), and the valve core structure and the valve seat (5) form a sliding fit; a first oil port (61) and a second oil port (62) are sequentially arranged on the side wall of the valve body (6) along the axial direction, the first oil port (61) is close to the damping tail (1), and the second oil port (62) is close to the valve core body (4).

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