Damping device and valve equipped therewith
The damping device addresses instability in check valves by adjusting channel communication areas to stabilize opening and closing, reducing noise and extending lifespan through controlled damping.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- ヨーク·グアンジョウ·エアー·コンディショニング·アンド·リフリジレーション·カンパニー·リミテッド
- Filing Date
- 2024-06-13
- Publication Date
- 2026-07-24
AI Technical Summary
Check valves experience instability in flow rate or pressure, leading to frequent collisions with the valve seat sealing surface, causing noise and reducing lifespan due to inconsistent opening and closing responses.
A damping device with a housing and damping control core, featuring a partition portion and wing portions that adjust communication areas of connecting channels to control damping based on the relative movement of the damping control core, reducing collisions and noise by varying damping levels.
The damping device stabilizes the opening and closing of check valves, minimizing noise and extending lifespan by providing appropriate damping under varying flow conditions.
Smart Images
Figure 2026524981000001_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present disclosure generally relate to damping devices and valves including the same.
Background Art
[0002] A check valve generally needs to have a relatively small flow resistance in order to ensure a highly sensitive opening and closing response. However, in many applications, the flow rate or pressure of the medium is not stable. Sometimes, the flow rate or pressure of the medium is very small, and the valve disk of the check valve cannot maintain a stable small opening and frequently collides with the valve seat sealing surface. Sometimes, the flow rate or pressure of the medium is very large, and the valve disk frequently collides with the maximum opening limit part of the check valve. In such situations, the check valve emits extremely annoying noises, even loud noises, causing damage to the valve seat sealing surface and the maximum opening limit part, thereby shortening the lifespan of the check valve.
Summary of the Invention
[0003] According to a first aspect of the present disclosure, the disclosure provides a damping device comprising a housing and a damping control core. The housing defines a generally cylindrical chamber, the chamber is filled with damping fluid, and the housing includes a partition portion that protrudes from the inner wall of the housing and defines an extreme position. The damping control core is disposed within the chamber and is rotatable relative to the housing, and the damping control core includes a wing portion, the wing portion having a limiting surface that faces the extreme position and can be stopped by the partition portion, the limiting surface reaching the control position when the distance between the limiting surface and the extreme position is a control distance. The chamber comprises a proximal housing cavity near the extreme position and a distal housing cavity farther from the extreme position, the proximal and distal housing cavities being formed by being separated by the partition portion or the wing portion, and the volume of each proximal housing cavity and the volume of the corresponding distal housing cavity change in opposite directions as the damping control core moves relative to the housing. An inner connecting channel is formed in the wing portion and an outer connecting channel is formed between the wing portion and the inner wall, or an inner connecting channel is formed in the partition portion and an outer connecting channel is formed between the partition portion and the damping control core. The inner and outer connecting channels can be controllably connected to the proximal and distal containment cavities. The damping device is configured such that when the limiting surface is not between the control position and the extreme position, the communication area of the outer connecting channel increases, thereby resulting in less damping; when the limiting surface moves towards the extreme position between the control position and the extreme position, the communication area of the outer and inner connecting channels decreases, thereby resulting in greater damping; and when the limiting surface moves away from the extreme position between the control position and the extreme position, the communication area of the outer connecting channel decreases and the communication area of the inner connecting channel increases, thereby resulting in less damping.
[0004] The damping device according to the first embodiment described above further comprises a flow limiting boss. The flow limiting boss protrudes from the inner wall of the housing and extends circumferentially, and the flow limiting boss extends from the partition portion toward the blade portion by a control distance, or the flow limiting boss comprises a proximal surface close to the extreme value position and a distal surface away from the extreme value position, wherein the distance from the proximal surface to the extreme value position is less than or equal to the circumferential length of the radially outer surface of the blade portion, and the distance from the distal surface to the extreme value position is the control distance. The communication area of the outer connection channel can be reduced by the flow limiting boss.
[0005] In the damping device according to the first embodiment described above, the damping control core includes a mandrel and two wing portions extending radially outward from the mandrel, the two opposing sides of the partition portion each define two extreme value positions, and the housing each comprises two flow limiting bosses adjacent to the two extreme value positions.
[0006] The damping device according to the first embodiment described above further comprises a flow limiting bump. The flow limiting bump protrudes from the outer surface of the damping control core and extends circumferentially, and the flow limiting bump extends from the blade portion toward the partition portion by a control distance, or the flow limiting bump comprises a proximal surface close to the blade portion and a distal surface away from the blade portion, the distance from the proximal surface to the limiting surface being less than or equal to the circumferential length of the radially inner surface of the partition portion, and the distance from the distal surface to the limiting surface being the control distance. The communication area of the outer connection channel can be reduced by the flow limiting bump.
[0007] In the damping device according to the first embodiment described above, the damping control core comprises a mandrel and at least one wing portion extending radially outward from the mandrel, wherein two opposing sides of one of the wing portions each provide two limiting surfaces, the damping control core comprises two flow limiting bumps adjacent to the two limiting surfaces, and the housing comprises two partition portions, each defining two extreme value positions.
[0008] The damping device according to the first embodiment described above further comprises a channel control core, the channel control core being movably disposed within an inner connecting channel. The shape of the inner connecting channel is configured such that the communication area of the inner connecting channel can be increased or decreased by adjusting the position of the channel control core within the inner connecting channel.
[0009] In the damping device according to the first embodiment described above, the internal connection channel includes a continuously connected proximal channel, intermediate channel, and distal channel, the proximal channel being adjacent to and fluidly connected to the proximal housing cavity, the distal channel being adjacent to and fluidly connected to the distal housing cavity, and the channel control core being movably disposed within the intermediate channel.
[0010] In the damping device according to the first embodiment described above, the intermediate channel and channel control core generally extend along the axial direction, and the proximal channel and distal channel generally extend along the circumferential direction or generally extend along a direction at an acute angle to the circumferential direction. When the channel control core moves to the end of the intermediate channel near the proximal channel, the communication area of the inner connecting channel is S1, and when the channel control core moves to the end of the intermediate channel near the distal channel, the communication area of the inner connecting channel is S2, and S1 is greater than S2.
[0011] In the damping device according to the first embodiment described above, the channel control core is cylindrical over at least a portion of its length, and the radial section of the intermediate channel is an elliptical hole, the elliptical hole generally extending along the circumferential direction.
[0012] In the damping device according to the first embodiment described above, the internal connecting channel includes a plurality of proximal channels, which are generally spaced apart along the axial direction, and / or the internal connecting channel includes a plurality of distal channels, which are generally spaced apart along the axial direction.
[0013] In the damping device according to the first embodiment described above, reducing the communication area of the outer connection channel includes closing the outer connection channel, and reducing the communication area of the inner connection channel includes closing the inner connection channel.
[0014] According to a second aspect of this disclosure, the disclosure provides a valve comprising a valve body, a valve core, and a damping device according to the first aspect. One of the valve body and the valve core is fixedly connected to the housing of the damping device, and the other of the valve body and the valve core is fixedly connected to the damping control core of the damping device. [Brief explanation of the drawing]
[0015] [Figure 1] This is an axial cross-sectional view of a valve according to one embodiment of the present disclosure. [Figure 2A] This is a three-dimensional view of a damping device according to one embodiment of the present disclosure. [Figure 2B] This is a radial cross-sectional view of the damping device shown in Figure 2A in the first state. [Figure 2C] This is a radial cross-sectional view of the damping device shown in Figure 2A in the second state. [Figure 2D] This is a radial cross-sectional view of the damping device shown in Figure 2A in the third state. [Figure 2E] This is a three-dimensional view of the damping device shown in Figure 2A, with one end cover removed. [Figure 3A] This is a radial cross-sectional view of the damping device in a first state according to another embodiment of the present disclosure. [Figure 3B] This is a radial cross-sectional view of the damping device shown in Figure 3A in the second state. [Figure 3C] This is a radial cross-sectional view of the damping device shown in Figure 3A in the third state.
[0016] It should be understood that the drawings are not necessarily drawn to scale. In some cases, details that are not necessary to understand the invention or that make it difficult to detect other details may be omitted. Where appropriate, similar or identical reference numerals are used to indicate similar or identical components. [Modes for carrying out the invention]
[0017] Hereinafter, various specific embodiments of the present disclosure will be described with reference to the drawings that constitute part of the specification. Terms such as “front,” “rear,” “top,” “bottom,” “left,” “right,” “upper,” and “lower” are used in this disclosure to describe various exemplary structural parts and elements of the present disclosure. However, it should be understood that these terms as used herein are determined based on the exemplary orientation shown in the drawings for illustrative purposes only. Since embodiments disclosed in this disclosure may be set in different orientations, these terms describing orientation are for illustrative purposes only and should not be considered limiting.
[0018] Figure 1 is an axial cross-sectional view of a valve 100 according to one embodiment of the present disclosure. The valve 100 is a check valve comprising a valve body 120, a valve core 130, and a damping device 110.
[0019] The valve core 130 is rotatably connected to the valve body 120. For example, the valve 100 further includes an arm 140. The valve core 130 is fixedly connected to one end of the arm 140, and the other end of the arm 140 is rotatably connected to the valve body 120. When the valve 100 is not operating, the valve core 130 is in close contact with the valve seat sealing surface 121 of the valve body 120 under the action of gravity or the elastic force of a spring (not shown), and the valve 100 is in a closed state. When the medium flows into the fluid channel 122 in the valve 100 from left to right (in accordance with the direction shown in FIG. 1), and the pressure of the medium on the valve core 130 becomes greater than the opening pressure of the valve core 130, the valve core 130 rotates away from the valve seat sealing surface 121 and opens the valve 100. However, when the flow of the medium suddenly stops or reverses, the valve core 130 immediately rotates back to the valve seat sealing surface 121, closes the valve 100, and prevents the reverse flow of the medium from damaging the devices on the pipeline.
[0020] The damping device 110 is used to provide damping for the rotational movement of the valve core 130 relative to the valve body 120. The damping device 110 includes a housing 111 and a damping control core 112, which will be described in detail below.
[0021] FIGS. 2A to 2E show the specific structure of the damping device 110 according to an embodiment of the present disclosure. FIG. 2A is a perspective view of the damping device 110, FIG. 2B is a radial cross-sectional view of the damping device 110 in the first state, FIG. 2C is a radial cross-sectional view of the damping device 110 in the second state, FIG. 2D is a radial cross-sectional view of the damping device 110 in the third state, and FIG. 2E is a perspective view of the damping device 110 with one end cover 220 removed.
[0022] The damping device 110 includes a housing 111, an end cover 220, and a damping control core 112. The housing 111 defines a chamber 240 that is generally cylindrical, and the two end covers 220 are respectively connected to both ends of the housing 111 in the longitudinal direction to close the chamber 240. The chamber 240 is filled with a damping liquid such as silicone oil or other viscous fluid. A seal element (not shown) is disposed at a designated position within the damping device 110 to prevent the damping liquid within the chamber 240 from leaking to the outside.
[0023] The damping control core 112 is disposed within the chamber 240 and can rotate relative to the housing 111. The damping device 11 is used to provide damping to two relatively rotating components. One of the two relatively rotating components is fixedly connected to the housing 111, and the other is fixedly connected to the damping control core 112.
[0024] The housing 111 includes a partition portion 213 that protrudes radially inward from the inner wall 211 of the housing 111. Two circumferentially opposing sides of the partition portion 213 respectively define two extreme positions 201. The damping control core 112 includes a generally cylindrical mandrel 231 and two wing portions 232 that extend radially outward from the mandrel 231. A limiting surface 233 facing the corresponding extreme position 201 is provided on one circumferential side of each wing portion 232. The radially outer surface of the wing portion 232 is an arc surface centered on the axis X of the mandrel 231.
[0025] As the damping control core 112 rotates in one direction relative to the housing 111 until the limiting surface 233 of one wing section 232 reaches its corresponding extreme position 201, the limiting surface 233 is stopped by one side of the partition section 213, preventing the damping control core 112 from continuing to move. As the damping control core 112 rotates in another direction relative to the housing 111 until the limiting surface 233 of the other wing section 232 reaches its corresponding extreme position 201, the limiting surface 233 is stopped by the other side of the partition section 213, preventing the damping control core 112 from continuing to move.
[0026] The radially inner surface of the partition portion 213 is an arc surface and is in slidable contact with the outer surface of the mandrel 231, or the radially inner surface of the partition portion 213 is an arc surface parallel to the outer surface of the mandrel 231 and has a small gap with the outer surface of the mandrel 231.
[0027] As an optional configuration, a raised portion 214 symmetrical to the partition portion 213 is also disposed within the housing 111, and a centering or auxiliary centering effect can be achieved on the damping control core 112 via the partition portion 213 and the raised portion 214.
[0028] The partition portion 213 and the raised portion 214 extend from one side to the other in the axial direction of the chamber 240, respectively dividing the chamber 240 into two parts where the two wing portions 232 are located. The damping control core 112 extends from one side to the other in the axial direction of the chamber 240, and the wing portions 232 divide the chamber 240 to form a proximal containment cavity 241 close to the extreme value position 201 and a distal containment cavity 242 far from the extreme value position 201.
[0029] An internal connecting channel 250 connecting the proximal housing cavity 241 and the distal housing cavity 242 is formed in the wing portion 232, and an external connecting channel 270 connecting the proximal housing cavity 241 and the distal housing cavity 242 is formed between the wing portion 232 and the inner wall 211 of the housing 111. The internal connecting channel 250 and the external connecting channel 270 can be controllably connected to the proximal housing cavity 241 and the distal housing cavity 242, as detailed below.
[0030] The volumes of each proximal housing cavity 241 and the corresponding distal housing cavity 242 change in opposite directions as the damping control core 112 moves relative to the housing 111, i.e., the volume of one of the proximal housing cavity 241 and the corresponding distal housing cavity 242 increases and the volume of the other decreases, and the damping fluid flows through the inner connection channel 250 and / or outer connection channel 270 from the chamber with the increased volume to the chamber with the decreased volume.
[0031] The housing 111 also includes two flow limiting bosses 212, each adjacent to one of the two extreme positions 201. The flow limiting bosses 212 project radially inward from the inner wall 211 of the housing 111, extend from one side to the other in the axial direction of the chamber 240, and extend circumferentially from the partition portion 213 toward the corresponding wing portion 232 by a control distance D0, where D0 is an angular distance. The limiting surface 233 reaches the control position when the damping control core 112 rotates relative to the housing 111 until the angular distance D between one limiting surface 233 and the corresponding extreme position 201 becomes the control distance D0.
[0032] The radially inner surface of the flow limiting boss 212 is an arc surface centered on the axis X of the mandrel 231, and when the limiting surface 233 of one blade portion 232 is located between the corresponding control position and the extreme position 201, the radially inner surface of the corresponding flow limiting boss 212 is parallel to the radially outer surface of the blade portion 232 and separated by a small gap, thereby reducing the communication area of the corresponding outer connection channel 270 and reducing the flow rate of the corresponding outer connection channel 270. Alternatively, when the limiting surface 233 of one blade portion 232 is located between the corresponding control position and the extreme position 201, the radially inner surface of the corresponding flow limiting boss 212 is in slidable contact with the radially outer surface of the blade portion 232, thereby reducing the communication area of the corresponding outer connection channel 270 to 0 or nearly 0, and the corresponding outer connection channel 270 is closed or nearly closed.
[0033] In another embodiment not shown, the flow limiting boss 212 extends circumferentially and is located at a certain distance from the corresponding extreme position 201. The flow limiting boss 212 comprises a proximal surface close to the corresponding extreme position 201 and a distal surface farther from the corresponding extreme position 201, with the proximal and distal surfaces positioned on opposite sides of the flow limiting boss 212 in the circumferential direction. The distance from the proximal surface to the corresponding extreme position 201 is less than or equal to the circumferential length of the radially outer surface of the blade portion 232, and the distance from the distal surface to the corresponding extreme position 201 is the control distance D0.
[0034] Referring to Figures 2A to 2E, each internal connection channel 250 comprises a continuously connected proximal channel 251, an intermediate channel 253, and a distal channel 252. One end of the proximal channel 251 is adjacent to the proximal housing cavity 241 and is fluidly connected to the proximal housing cavity 241, and the other end of the proximal channel 251 is connected to the intermediate channel 253. One end of the distal channel 252 is adjacent to the distal housing cavity 242 and is fluidly connected to the distal housing cavity 242, and the other end of the distal channel 252 is connected to the intermediate channel 253. The intermediate channel 253 movably includes a channel control core 260.
[0035] The intermediate channel 253 and the channel control core 260 generally extend axially, i.e., along the axis X of the mandrel 231. The channel control core 260 is cylindrical for at least a portion of its length, and the radial section of the intermediate channel 253 is an elliptical hole, which generally extends circumferentially, thereby facilitating the movement of the channel control core 260 within the intermediate channel 253. The intermediate channel 253 has two opposing ends in the circumferential direction, i.e., a proximal end 2531 closer to the proximal channel 251 and a distal end 2532 closer to the distal channel 252.
[0036] The shape of the inner connection channel 250 is configured such that the communication area of the inner connection channel 250 can be increased or decreased by adjusting the position of the channel control core 260 within the inner connection channel 250. The proximal channel 251 and distal channel 252 generally extend along the circumferential direction, and as a result, when the damping control core 112 rotates relative to the housing 111, the damping fluid flowing through the inner connection channel 250 pushes and moves the channel control core 260, thereby automatically controlling the flow rate within the inner connection channel 250, as detailed below.
[0037] The distal channel 252 is a circular hole connected to the distal end 2532 of the intermediate channel 253. The diameter of the distal channel 252 is the same as or similar to the diameter of the cylindrical portion of the channel control core 260. Referring to Figure 2C, when the channel control core 260 moves to the distal end 2532 of the intermediate channel 253, the channel control core 260 can block all or most of the interface between the distal channel 252 and the intermediate channel 253. At this time, the communication area S2 of the inner connecting channel 250 is 0 or nearly 0, and the inner connecting channel 250 is either closed or only a small amount of damping fluid is allowed to pass through the inner connecting channel 250.
[0038] The proximal channel 251 is a circular hole, and its diameter is larger than the diameter of the cylindrical portion of the channel control core 260. The proximal channel 251 intersects with the proximal end 2531 of the intermediate channel 253 and extends to the middle portion of the intermediate channel 253, which is located between the proximal end 2531 and the distal end 2532. Referring to Figure 2D, when the channel control core 260 moves to the proximal end 2531 of the intermediate channel 253, the channel control core 260 can only block a small portion of the interface between the proximal channel 251 and the intermediate channel 253. At this time, the communication area S1 of the inner connecting channel 250 is much larger than 0 and larger than S2, thereby allowing more damping fluid to pass through the inner connecting channel 250.
[0039] In some other embodiments not shown, it can be understood that the inner connecting channel 250 may be configured in other shapes. For example, in one embodiment, the proximal channel 251 extends generally along a direction acute to the circumferential direction and connects to the middle portion of the intermediate channel 253. The diameter of the proximal channel 251 may be larger than, smaller than, or equal to the diameter of the cylindrical portion of the channel control core 260, or the proximal channel 251 may be a non-circular hole. When the channel control core 260 moves to the proximal end 2531 of the intermediate channel 253, the channel control core 260 may not be able to block the interface between the proximal channel 251 and the intermediate channel 253, or may only block a small portion of this interface, thereby allowing more damping fluid to pass through the inner connecting channel 250.
[0040] In another embodiment, the proximal channel 251 and the intermediate channel 253 extend generally circumferentially but only partially overlap radially. That is, a portion of the proximal channel 251 overlaps with a portion of the intermediate channel 253, and the other portion of the proximal channel 251 is located radially inward or radially outward of the intermediate channel 253. The diameter of the proximal channel 251 may be greater than, less than, or equal to the diameter of the cylindrical portion of the channel control core 260, or the proximal channel 251 may be a non-circular hole. When the channel control core 260 moves to the proximal end 2531 of the intermediate channel 253, the channel control core 260 cannot block the portion of the proximal channel 251 that is located radially inward or radially outward of the intermediate channel 253, thereby allowing more damping fluid to pass through the inner connecting channel 250.
[0041] In yet another embodiment, the distal channel 252 is configured to extend generally along a direction acute to the circumferential direction. The distal channel 252 can be a circular or non-circular hole, as long as the channel control core 260 can close the inner connecting channel 250, or as long as only a small amount of damping fluid can pass through the inner connecting channel 250 when the channel control core 260 moves to the distal end 2532 of the intermediate channel 253.
[0042] Referring further to Figures 2A to 2E, the internal connection channel 250 comprises a plurality of proximal channels 251 generally spaced apart along the axial direction and a plurality of distal channels 252 generally spaced apart along the axial direction. As a result, the channel control core 260 receives a more uniform axial force, thereby making the movement of the channel control core 260 smoother and more precise, and ensuring the flow rate requirements of the internal connection channel 250 under high flow conditions while minimizing the impact on the strength of the damping control core 112.
[0043] In another embodiment not shown, the internal connection channel 250 comprises a plurality of intermediate channels 253 spaced apart along the axial direction and a plurality of channel control cores 260. Each intermediate channel 253 is connected to one proximal channel 251 and one distal channel 252 and contains one channel control core 260 internally.
[0044] The operating principle of the damping device 110 in the embodiments shown in Figures 2A to 2E will be described below with reference to Figures 2B to 2D, taking the example in which the housing 111 is stationary and the damping control core 112 rotates. In some other embodiments, it can be understood that the damping device 110 may be configured such that the housing 111 rotates while the damping control core 112 is stationary, or that the housing 111 and the damping control core 112 may be configured to rotate at different speeds and / or in different directions. The end cover 220 may be fixedly connected to the housing 111 or configured to be rotatably connected.
[0045] Referring to Figure 2B, in the first state, neither of the two limiting surfaces 233 is between the corresponding control position and the extreme position 201. Compared to the states shown in Figures 2C and 2D, the gap between the wing portion 232 of the housing 111 and the inner wall 211 is larger, and the communication area of the outer connection channel 270 is increased. As the damping control core 112 rotates relative to the housing 111, the damping fluid can flow rapidly through the outer connection channel 270 from the chamber with reduced volume to the chamber with increased volume in the proximal and distal housing cavities 241 and 242, thereby causing the damping device 110 to produce less damping.
[0046] Referring to Figure 2C, in the second state, the limiting surface 233 of one blade portion 232, such as the blade portion 232 in the lower left corner, moves toward the extreme position 201 between the corresponding control position and the extreme position 201. The volume of the proximal containment cavity 241 located between the blade portion 232 and the corresponding extreme position 201 decreases accordingly, and the volume of the distal containment cavity 242 located on the opposite side of the blade portion 232 increases accordingly, forming a small gap or slip fit between the radially inner surface of the corresponding flow limiting boss 212 and the radially outer surface of the blade portion 232. Thus, compared to the state shown in Figure 2B, the communication area of the corresponding outer connection channel 270 decreases, thereby limiting the flow of damped fluid through the outer connection channel 270.
[0047] The damping fluid in the proximal containment cavity 241 between the blade portion 232 and the corresponding extreme position 201 flows into the inner connecting channel 250 within the blade portion 232, pushing the channel control core 260 to the distal end 2532 of the intermediate channel 253. As a result, the communication area of the inner connecting channel 250 decreases, thereby restricting the flow of damping fluid through the inner connecting channel 250 from the proximal containment cavity 241, which has decreased in volume, to the distal containment cavity 242, which has increased in volume. In other words, it limits the rate of volume change of the proximal containment cavity 241 and the distal containment cavity 242 in order to limit the rotational speed of the damping control core 112 relative to the housing, and as a result, the damping device 110 provides greater damping. A small gap exists between the partition portion 213 and the outer surface of the mandrel 231 to ensure that at least one of the outer connection channel 270 and the inner connection channel 250 is not completely closed and / or that the damping control core 112 does not become stuck, and that the limiting surface 233 of the wing portion 232 can slowly reach the corresponding extreme value position 201.
[0048] Referring to Figure 2D, in the third state, the limiting surface 233 of one blade portion 232, such as the blade portion 232 at the lower left corner, moves away from the extreme position 201 between the corresponding control position and the extreme position 201, the volume of the proximal containment cavity 241 located between the blade portion 232 and the corresponding extreme position 201 increases accordingly, and the volume of the distal containment cavity 242 located on the opposite side of the blade portion 232 decreases accordingly, forming a small gap or slip fit between the radially inner surface of the corresponding flow limiting boss 212 and the radially outer surface of the blade portion 232. Thus, compared to the state shown in Figure 2B, the communication area of the corresponding outer connection channel 270 is reduced, thereby limiting the flow of damped fluid through the outer connection channel 270.
[0049] The damping fluid in the distal containment cavity 242 on the opposite side of the blade portion 232 flows into the inner connecting channel 250 within the blade portion 232, pushing the channel control core 260 to the proximal end 2531 of the intermediate channel 253. As a result, the communication area of the inner connecting channel 250 increases, and the damping fluid can flow rapidly through the inner connecting channel 250 from the distal containment cavity 242, which has a reduced volume, to the proximal containment cavity 241, which has an increased volume. Thereafter, the damping device 110 provides less damping.
[0050] The specific structure and operating principle of the damping device 110 according to another embodiment of the present disclosure will be described below with reference to Figures 3A to 3C, where Figure 3A is a radial cross-sectional view of the damping device 110 in a first state, Figure 3B is a radial cross-sectional view of the damping device 110 in a second state, and Figure 3C is a radial cross-sectional view of the damping device 110 in a third state. This embodiment follows the element numbers and some of the content of the previously described embodiments, using the same numbers to represent the same or similar elements, and selectively omitting descriptions of the same technical content. For descriptions of omitted parts, refer to the previously described embodiments, and this embodiment will not repeat those descriptions.
[0051] In the embodiments shown in Figures 3A to 3C, the housing 111 includes two partition portions 213, each defining two extreme positions 201. The damping control core 112 comprises a generally cylindrical mandrel 231 and two wing portions 232 extending radially outward from the mandrel 231. Two limiting surfaces 233 are provided on two opposing circumferential sides of one wing portion 232. The two limiting surfaces 233 each face the two extreme positions 201 and can each be stopped by the corresponding partition portion 213.
[0052] The radially outer surface of each wing portion 232 is an arc surface parallel to the inner wall 211 of the housing 111, having a small gap from the inner wall 211 of the housing 111, or the radially outer surface of each wing portion 232 is in slidable contact with the inner wall 211 of the housing 111, thereby achieving a centering or auxiliary centering effect on the damping control core 112.
[0053] The damping control core 112 extends from one side to the other in the axial direction of the chamber 240, dividing the chamber 240 into two parts, with the two partition portions 213 located in each of these two parts. The partition portions 213 extend from one side to the other in the axial direction of the chamber 240, dividing the chamber 240 and forming a proximal housing cavity 241 close to the extreme position 201 and a distal housing cavity 242 further away from the extreme position 201.
[0054] An internal connecting channel 250 connecting the proximal housing cavity 241 and the distal housing cavity 242 is formed in the partition portion 213, and an external connecting channel 270 connecting the proximal housing cavity 241 and the distal housing cavity 242 is formed between the partition portion 213 and the damping control core 112.
[0055] Each damping control core 112 includes two flow limiting bumps 335 adjacent to two limiting surfaces 233. The flow limiting bumps 335 project outward from the outer surface of the damping control core 112, extend from one side to the other in the axial direction of the chamber 240, and extend circumferentially from the wing portion 232 toward the corresponding partition portion 213 by a control distance D0, where D0 is an angular distance. When the damping control core 112 rotates relative to the housing 111 until the angular distance D between one limiting surface 233 and the corresponding extreme position 201 becomes the control distance D0, the limiting surface 233 reaches the control position.
[0056] The radially outer surface of the flow limiting bump 335 and the radially inner surface of the partition portion 213 are, respectively, arc surfaces centered on the axis of the mandrel 231. When one limiting surface 233 is located between the corresponding control position and the extreme position 201, the radially outer surface of the corresponding flow limiting bump 335 is parallel to the radially inner surface of the corresponding partition portion 213 and separated by a small gap, thereby reducing the communication area of the corresponding outer connection channel 270 and reducing the flow rate of the corresponding outer connection channel 270. Alternatively, when one limiting surface 233 is located between the corresponding control position and the extreme position 201, the radially outer surface of the corresponding flow limiting bump 335 is in slidable contact with the radially inner surface of the corresponding partition portion 213, thereby reducing the communication area of the corresponding outer connection channel 270 to 0 or nearly 0, and closing or nearly closing the corresponding outer connection channel 270.
[0057] In another embodiment not shown, the flow limiting bump 335 extends circumferentially and is located at a specific distance from the corresponding limiting surface 233. The flow limiting bump 335 has a proximal surface close to the corresponding blade portion 232 and a distal surface away from the corresponding blade portion 232, the proximal and distal surfaces being located on the circumferential sides of the flow limiting bump 335, respectively. The distance from the proximal surface to the corresponding limiting surface 233 is less than or equal to the circumferential length of the radially inner surface of the partition portion 213, and the distance from the distal surface to the corresponding limiting surface 233 is the control distance D0.
[0058] The operating principle of the damping device 110 in the embodiment shown in Figures 3A to 3C will be explained below.
[0059] Referring to Figure 3A, in the first state, neither of the two limiting surfaces 233 is between the corresponding control position and the extreme position 201. Compared to the states shown in Figures 3B and 3C, the gap between the partition portion 213 and the damping control core 112 is larger, and the communication area of the outer connection channel 270 is increased. As the damping control core 112 rotates relative to the housing 111, the damping fluid can flow rapidly through the outer connection channel 270 from the chamber with reduced volume in the proximal housing cavity 241 and the distal housing cavity 242 to the chamber with increased volume, thereby causing the damping device 110 to produce less damping.
[0060] Referring to Figure 3B, in the second state, one of the limiting surfaces 233, such as the right limiting surface 233 of the wing portion 232 at the lower left corner, moves toward the extreme position 201 between the corresponding control position and the extreme position 201. The volume of the proximal containment cavity 241 located between the limiting surface 233 and the corresponding partition portion 213 decreases accordingly, and the volume of the distal containment cavity 242 located on the opposite side of the partition portion 213 increases accordingly. A small gap or slip fit is formed between the radially outer surface of the corresponding flow limiting bump 335 and the radially inner surface of the corresponding partition portion 213. Thus, compared to the state shown in Figure 3A, the communication area of the corresponding outer connection channel 270 is reduced, thereby limiting the flow of damped fluid through the outer connection channel 270.
[0061] The damping fluid in the proximal housing cavity 241 between the limiting surface 233 and the corresponding partition portion 213 flows into the inner connecting channel 250 within the partition portion 213, pushing the channel control core 260 to the distal end 2532 of the intermediate channel 253. As a result, the communication area of the inner connecting channel 250 decreases, thereby restricting the flow of damping fluid through the inner connecting channel 250 from the proximal housing cavity 241, which has decreased in volume, to the distal housing cavity 242, which has increased in volume. In other words, it limits the rate of volume change of the proximal housing cavity 241 and the distal housing cavity 242 in order to limit the rotational speed of the damping control core 112 relative to the housing 111, and as a result, the damping device 110 provides greater damping. A small gap exists between the radial outer surface of the wing portion 232 and the inner wall 211 of the housing 111 to ensure that at least one of the outer connection channel 270 and the inner connection channel 250 is not completely closed and / or that the damping control core 112 does not become stuck in the extreme position, and that the limiting surface 233 can slowly reach the corresponding 201.
[0062] Referring to Figure 3C, in the third state, one of the limiting surfaces 233, such as the right limiting surface 233 of the wing portion 232 at the lower left corner, moves away from the extreme position 201 between the corresponding control position and the extreme position 201. The volume of the proximal containment cavity 241 located between the limiting surface 233 and the corresponding partition portion 213 increases accordingly, and the volume of the distal containment cavity 242 located on the opposite side of the partition portion 213 decreases accordingly, forming a small gap or slip fit between the radially outer surface of the corresponding flow limiting bump 335 and the radially inner surface of the corresponding partition portion 213. Thus, compared to the state shown in Figure 3A, the communication area of the corresponding outer connection channel 270 is reduced, thereby limiting the flow of damped fluid through the outer connection channel 270.
[0063] The damping fluid in the distal containment cavity 242 on the opposite side of the partition portion 213 flows into the inner connecting channel 250 within the partition portion 213, pushing the channel control core 260 to the proximal end 2531 of the intermediate channel 253. As a result, the communication area of the inner connecting channel 250 increases, thereby allowing the damping fluid to flow rapidly from the distal containment cavity 242, which has decreased in volume, to the proximal containment cavity 241, which has increased in volume. Consequently, the damping device 110 produces less damping.
[0064] Referring to Figure 1, the valve 100 further comprises a connecting rod 150 fixedly connected to the valve body 120. The connecting rod 150 passes through the damping control core 112 and is fixedly connected to the damping control core 112, thereby fixedly connecting the valve body 120 to the damping control core 112 of the damping device 110. The end of the arm 140 connected to the valve body 120 forms the housing 111 of the damping device 110, thereby fixedly connecting the valve core 130 to the housing 111 of the damping device 110.
[0065] Therefore, as the valve core 130 rotates relative to the valve body 120, the damping device 110 controls the flow rate of the inner connection channel 250 and / or the outer connection channel 270, and controls the rate of change in the volume of the proximal housing cavity 241 and the distal housing cavity 242 by adjusting the relative movement speed of the housing 111 and the damping control core 112 relative to each other, i.e., the rotation speed of the valve core 130 relative to the valve body 120. The two extreme positions 201 of the damping device 110 correspond to the closed position and the maximum open position of the valve core 130, respectively.
[0066] As the valve core 130 approaches the closed position or approaches the maximum open position, the state of the damping device 110 becomes equivalent to the second state described above. At this time, the damping device 110 provides significant damping, and as a result, the valve core 130 slowly reaches the fully closed position or the maximum open position to prevent the valve core 130 from colliding with the valve seat seal surface 121 or the maximum open limit.
[0067] At the moment the valve core 130 opens the valve from the fully closed position, or conversely, closes the valve from the maximum open position, the state of the damping device 110 becomes equivalent to the third state described above. At this time, the damping device 110 provides a small damping, thereby ensuring that the opening and closing response of the valve core 130 is highly sensitive.
[0068] When the valve core 130 is neither close to the fully closed position nor close to the fully open position, the state of the damping device 110 is equivalent to the first state described above. In this case, the damping device 110 provides a small damping, thereby ensuring a highly sensitive response of the valve core 130.
[0069] The valve 100 according to the embodiments of this disclosure can avoid frequent collisions between the valve core 130 and the valve seat sealing surface 121 and / or the maximum opening limit while ensuring a highly sensitive response of the valve. This reduces or avoids abnormal noise caused by mechanical collisions and extends the life of the valve.
[0070] The damping device 110 according to embodiments of this disclosure can provide damping that meets the needs of different conditions depending on the relative position and relative direction of movement of the housing 111 and the damping control core 112. The damping device 110 has a simple structure, is easy to operate, and can be used not only for check valves but also for other types of valves or other relative rotating components.
[0071] In the embodiment shown in Figure 1, the valve body 120 is fixedly connected to the damping control core 112 of the damping device 110, and the valve core 130 is fixedly connected to the housing 111 of the damping device 110. However, it should be noted that in other embodiments, the valve body 120 can be fixedly connected to the housing 111 of the damping device 110, and the valve core 130 can be fixedly connected to the damping control core 112 of the damping device 110. In addition, in the above embodiment, the damping device 110 is provided with two extreme positions 201, but in some other embodiments, depending on the needs of the practical application, the damping device may also be provided with only one extreme position, and the number of limiting surfaces, wing portions, inner connection channels, outer connection channels, etc., can be adjusted accordingly.
[0072] While this disclosure has been described in relation to the embodiments outlined above, various alternatives, modifications, variations, improvements, and / or substantial equivalents, whether known or currently or soon foreseeable, may be apparent to those skilled in the art. In addition, the technical effects and / or technical problems described herein are illustrative, not restrictive. Accordingly, the disclosure herein may be used to solve other technical problems, may have other technical effects, and / or may solve other technical problems. Accordingly, the embodiments of the present disclosure described above are intended to be illustrative, not restrictive. Various modifications may be made without departing from the spirit and scope of this disclosure. Accordingly, this disclosure is intended to encompass all known or previously developed alternatives, modifications, variations, improvements, and / or substantial equivalents.
Claims
1. Damping device (110), A housing (111) comprising a housing (111) which defines a generally cylindrical chamber (240), the chamber (240) being filled with a damping fluid, and a partition portion (213) protruding from the inner wall (211) of the housing (111) such that the housing (111) defines an extreme position (201), A damping control core (112) is disposed within the chamber (240), is rotatable relative to the housing (111), is provided with a wing portion (232), the wing portion (232) is provided with a limiting surface (233), the limiting surface (233) faces the extreme position (201) and is stoppable by the partition portion (213), and the distance (D) between the limiting surface (233) and the extreme position (201) is a control distance (D ０ When this is the case, the limiting surface (233) comprises a damping control core (112) that reaches the control position, The chamber (240) comprises a proximal housing cavity (241) near the extreme position (201) and a distal housing cavity (242) away from the extreme position (201), wherein the proximal housing cavity (241) and the distal housing cavity (242) are separated by the partition portion (213) or the wing portion (232), and the volume of each proximal housing cavity (241) and the volume of the corresponding distal housing cavity (242) change in opposite directions as the damping control core (112) moves relative to the housing (111). An inner connection channel (250) is formed in the wing portion (232), and an outer connection channel (270) is formed between the wing portion (232) and the inner wall (211), or the inner connection channel (250) is formed in the partition portion (213), and the outer connection channel (270) is formed between the partition portion (213) and the damping control core (112), and the inner connection channel (250) and the outer connection channel (270) can be controllably connected to the proximal housing cavity (241) and the distal housing cavity (242), The damping device (110) is When the limiting surface (233) is not between the control position and the extreme value position (201), the communication area of the outer connection channel (270) increases, thereby causing the damping device (110) to produce less damping. As the limiting surface (233) moves toward the extreme value position (201) between the control position and the extreme value position (201), the communication area of the outer connection channel (270) and the inner connection channel (250) decreases, thereby causing the damping device (110) to produce greater damping. The damping device (110) is configured such that when the limiting surface (233) moves away from the extreme value position (201) between the control position and the extreme value position (201), the communication area of the outer connection channel (270) decreases and the communication area of the inner connection channel (250) increases, thereby causing the damping device (110) to produce less damping.
2. The device further comprises a flow limiting boss (212), the flow limiting boss (212) protruding from the inner wall (211) of the housing (111) and extending along the circumferential direction, the flow limiting boss (212) extending from the partition portion (213) toward the wing portion (232) at the control distance (D ０ ) extends only by a certain distance, or the flow limiting boss (212) comprises a proximal surface close to the extreme value position (201) and a distal surface away from the extreme value position (201), wherein the distance from the proximal surface to the extreme value position (201) is less than or equal to the circumference of the radially outer surface of the blade portion (232), and the distance from the distal surface to the extreme value position (201) is equal to the control distance (D ０ ) and The damping device (110) according to claim 1, wherein the communication area of the outer connection channel (270) can be reduced by the flow rate limiting boss (212).
3. The damping control core (112) comprises a mandrel (231) and two wing portions (232) extending radially outward from the mandrel (231), the two opposing sides of the partition portion (213) each define two extreme positions (201), and the housing (111) is provided with two flow limiting bosses (212) adjacent to the two extreme positions (201), the damping device (110) according to claim 2.
4. The system further includes a flow limiting bump (335), the flow limiting bump (335) protruding from the outer surface of the damping control core (112) and extending along the circumferential direction, and the flow limiting bump (335) extends from the wing portion (232) toward the partition portion (213) toward the control distance (D ０ ) extends only by a certain distance, or the flow limiting bump (335) comprises a proximal surface close to the blade portion (232) and a distal surface away from the blade portion (232), wherein the distance from the proximal surface to the limiting surface (233) is less than or equal to the circumference of the radially inner surface of the partition portion (213), and the distance from the distal surface to the limiting surface (233) is equal to the control distance (D ０ ) and The damping device (110) according to claim 1, wherein the communication area of the outer connection channel (270) can be reduced by the flow rate limiting bump (335).
5. The damping device (110) according to claim 4, wherein the damping control core (112) comprises a mandrel (231) and at least one wing portion (232) extending radially outward from the mandrel (231), two opposing sides of one of the at least one wing portion (232) each provide two limiting surfaces (233), the damping control core (112) is provided with two flow limiting bumps (335) adjacent to the two limiting surfaces (233), the housing (111) comprises two partition portions (213), the two partition portions (213) each define two extreme positions (201).
6. The system further comprises a channel control core (260), the channel control core (260) being movably disposed within the internal connection channel (250), The shape of the inner connection channel (250) is configured such that the communication area of the inner connection channel (250) can be increased or decreased by adjusting the position of the channel control core (260) within the inner connection channel (250), as described in any one of claims 1 to 5.
7. The damping device (110) according to claim 6, wherein the internal connecting channel (250) comprises a continuously connected proximal channel (251), an intermediate channel (253), and a distal channel (252), the proximal channel (251) is adjacent to the proximal housing cavity (241) and is fluidly connected to the proximal housing cavity (241), the distal channel (252) is adjacent to the distal housing cavity (242) and is fluidly connected to the distal housing cavity (242), and the channel control core (260) is movably disposed within the intermediate channel (253).
8. The intermediate channel (253) and the channel control core (260) generally extend along the axial direction, and the proximal channel (251) and the distal channel (252) generally extend along the circumferential direction, or generally extend along a direction at an acute angle to the circumferential direction. When the channel control core (260) moves to the end (2531) of the intermediate channel (253) close to the proximal channel (251), the communication area of the inner connection channel (250) is S １ When the channel control core (260) moves to the end (2532) of the intermediate channel (253) close to the distal channel (252), the communication area of the inner connection channel (250) is S ２ where S １ is greater than S ２ The attenuation device (110) according to claim 7
9. The damping device (110) according to claim 8, wherein the channel control core (260) is cylindrical over at least a portion of its length, and the radial section of the intermediate channel (253) is an elliptical hole, the elliptical hole generally extending along the circumferential direction.
10. The inner connecting channel (250) comprises a plurality of proximal channels (251), the plurality of proximal channels (251) are generally spaced apart along the axial direction, and / or The damping device (110) according to claim 8, wherein the internal connecting channel (250) comprises a plurality of distal channels (252), and the plurality of distal channels (252) are generally spaced apart along the axial direction.
11. The damping device (110) according to any one of claims 1 to 5, wherein reducing the communication area of the outer connection channel (270) includes closing the outer connection channel (270), and reducing the communication area of the inner connection channel (250) includes closing the inner connection channel (250).
12. A valve (100) comprising a valve body (120), a valve core (130), and a damping device (110) according to any one of claims 1 to 11, wherein one of the valve body (120) and the valve core (130) is fixedly connected to the housing (111) of the damping device (110), and the other of the valve body (120) and the valve core (130) is fixedly connected to the damping control core (112) of the damping device (110).