Damping device and valve comprising the same

Abstract

The present disclosure provides a damping device, the housing of which defines a chamber filled with damping liquid, and a partition of the inner wall of the housing defines limit positions. A damping control core in the chamber is rotatable relative to the housing, and a wing of the damping control core has a limit surface that can be stopped by the partition. The chamber includes a proximal cavity and a distal cavity separated by the partition or the wing, and the volumes of the two cavities change in opposite directions as the damping control core moves relative to the housing. An inner connecting channel is provided in the wing or the partition, and an outer connecting channel is provided between the wing and the inner wall or between the partition and the damping control core. The inner and outer connecting channels controllably connect the proximal and distal cavities. When the limit surface is not between the control position and the limit position or when the limit surface moves away from the limit position between the control position and the limit position, the damping device provides smaller damping; when the limit surface moves toward the limit position between the control position and the limit position, the damping device provides larger damping.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure generally relate to a damping device and a valve comprising the same. BACKGROUND

[0002] Check valves usually require a small flow resistance to ensure a sensitive opening and closing response. However, in many applications, the flow or pressure of the medium is not stable, sometimes the flow or pressure of the medium is small, and the valve disc of the check valve cannot maintain a stable small opening, frequently hitting the sealing surface of the valve seat, and sometimes the flow or pressure of the medium is large, and the valve disc frequently hits the maximum opening limit of the check valve. In such cases, the check valve will emit very disturbing noise, even loud sound, and will cause damage to the sealing surface of the valve seat and the maximum opening limit, shortening the service life of the check valve. SUMMARY

[0003] According to a first aspect of the present disclosure, a damping device is provided, comprising a housing and a damping control core. The housing defines a generally cylindrical chamber filled with damping liquid, and comprises a partition protruding from an inner wall of the housing to define a limit position. The damping control core is arranged in the chamber and is rotatable relative to the housing, and has a wing portion with a limit surface facing the limit position and being stoppable by the partition, wherein the limit surface reaches a control position when the distance between the limit surface and the limit position is a control distance. The chamber comprises a proximal volume cavity near the limit position and a distal volume cavity away from the limit position, the proximal volume cavity and the distal volume cavity are separated by the partition or the wing portion, and the volumes of the proximal volume cavity and the distal volume cavity change in opposite directions with the movement of the damping control core relative to the housing. The wing portion is provided with an inner connecting channel, an outer connecting channel is provided between the wing portion and the inner wall, or the partition is provided with an inner connecting channel, and an outer connecting channel is provided between the partition and the damping control core. The inner connecting channel and the outer connecting channel are controllably connected to the proximal volume cavity and the distal volume cavity. The damping device is configured to: when the limit surface is not between the control position and the limit position, the outer connecting channel is increased in communication area, so that the damping device provides smaller damping; when the limit surface moves between the control position and the limit position towards the limit position, the outer connecting channel and the inner connecting channel are reduced in communication area, so that the damping device provides larger damping; and when the limit surface moves between the control position and the limit position away from the limit position, the outer connecting channel is reduced in communication area, and the inner connecting channel is increased in communication area, so that the damping device provides smaller damping.

[0004] The damping device according to the first aspect further includes a flow-limiting boss. The flow-limiting boss protrudes from the inner wall of the housing and extends in the circumferential direction. The flow-limiting boss extends from the partition toward the wing portion by the control distance, or the flow-limiting boss includes a proximal surface close to the limit position and a distal surface away from the limit position, wherein the distance from the proximal surface to the limit position is no greater than the circumferential length of the radially outer surface of the wing portion, and the distance from the distal surface to the limit position is the control distance. The flow-limiting boss can reduce the connection area of ​​the external connecting channel.

[0005] According to the damping device of the first aspect mentioned above, the damping control core includes a core shaft and two wings extending radially outward from the core shaft, the opposite sides of the partition respectively define the two extreme positions, and the outer shell is provided with two flow limiting bosses respectively adjacent to the two extreme positions.

[0006] The damping device according to the first aspect further includes a flow-limiting protrusion. The flow-limiting protrusion protrudes from the outer surface of the damping control core and extends in the circumferential direction. The flow-limiting protrusion extends the control distance from the wing toward the partition, or the flow-limiting protrusion includes a proximal surface close to the wing and a distal surface away from the wing, wherein the distance from the proximal surface to the limiting surface is no greater than the circumferential length of the radial inner surface of the partition, and the distance from the distal surface to the limiting surface is the control distance. The external connecting channel can be reduced in connection area by the flow-limiting protrusion.

[0007] According to the damping device of the first aspect above, the damping control core includes a core shaft and at least one wing portion extending radially outward from the core shaft, and two limiting surfaces are provided on opposite sides of one of the at least one wing portion respectively. The damping control core is provided with two flow limiting protrusions respectively adjacent to the two limiting surfaces, and the outer shell includes two partitions, and the two partitions respectively define the two extreme positions.

[0008] The damping device according to the first aspect further includes a channel control core movably disposed in the inner connecting channel. The inner connecting channel is shaped so as to increase or decrease a connection area of ​​the inner connecting channel by adjusting a position of the channel control core in the inner connecting channel.

[0009] According to the damping device of the first aspect, the inner connecting passage comprises a proximal passage, an intermediate passage and a distal passage connected in sequence, the proximal passage is adjacent to and fluidly connected with the proximal cavity, the distal passage is adjacent to and fluidly connected with the distal cavity, and the passage control core is movably arranged in the intermediate passage.

[0010] According to the damping device of the first aspect, the intermediate passage and the passage control core extend substantially in an axial direction, and the proximal passage and the distal passage extend substantially in a circumferential direction or extend substantially in a direction that is at an acute angle to the circumferential direction. When the passage control core moves to one end of the intermediate passage close to the proximal passage, the communication area of the inner connecting passage is S1, and when the passage control core moves to one end of the intermediate passage close to the distal passage, the communication area of the inner connecting passage is S2, wherein S1 is greater than S2.

[0011] According to the damping device of the first aspect, the passage control core is cylindrical in at least part of the length, and the intermediate passage has a long hole in a radial cross section, which extends substantially in the circumferential direction.

[0012] According to the damping device of the first aspect, the inner connecting passage comprises a plurality of proximal passages arranged at intervals substantially in the axial direction; and / or the inner connecting passage comprises a plurality of distal passages arranged at intervals substantially in the axial direction.

[0013] According to the damping device of the first aspect, the outer connecting passage being reduced in communication area comprises the outer connecting passage being closed, and the inner connecting passage being reduced in communication area comprises the inner connecting passage being closed.

[0014] According to a second aspect of the present disclosure, the present 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 with the housing of the damping device, and the other of the valve body and the valve core is fixedly connected with the damping control core of the damping device. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is an axial sectional view of a valve according to an embodiment of the present disclosure;

[0016] Figure 2A is a perspective view of a damping device according to an embodiment of the present disclosure;

[0017] Figure 2B is Figure 2A is a radial sectional view of the damping device shown in a first state;

[0018] Figure 2C is Figure 2A a radial cross-sectional view of the damping device shown in FIG. 1 in a second state;

[0019] Figure 2D is Figure 2A a radial cross-sectional view of the damping device shown in FIG. 1 in a third state;

[0020] Figure 2E is Figure 2A a perspective view of the damping device shown in FIG. 1 with a side end cap removed;

[0021] Figure 3A is a radial cross-sectional view of a damping device according to another embodiment of the present disclosure in a first state;

[0022] Figure 3B is Figure 3A a radial cross-sectional view of the damping device shown in FIG. 1 in a second state;

[0023] Figure 3C is Figure 3A a radial cross-sectional view of the damping device shown in FIG. 1 in a third state.

[0024] It should be understood that the drawings are sometimes shown schematically. In certain instances, details that are not necessary for the understanding of the present disclosure can be omitted, or details that render other details difficult to perceive can be omitted. Where appropriate, like or similar reference numerals have been used to denote like or similar parts. DETAILED DESCRIPTION

[0025] Various embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings, which form a part of this specification. It should be understood that the various examples of the present disclosure described herein are used by way of example only and that the present disclosure is not limited to any particular embodiment described herein. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "about" when used in connection with a numerical value, means ± 10% of the recited value. As used herein, the term "coupled" means directly or indirectly connected, linked, or associated, whether electrically, mechanically, or otherwise.

[0026] 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, including a valve body 120, a valve core 130, and a damping device 110.

[0027] Valve core 130 is rotatably connected to valve body 120. For example, valve 100 further comprises an arm 140, one end of which is fixedly connected to valve core 130, and the other end of which is rotatably connected to valve body 120. When valve 100 is not in operation, valve core 130 is tightly sealed against valve seat sealing surface 121 of valve body 120 under the action of gravity or the elastic force of an unshown spring, and valve 100 is in a closed state. When medium flows into fluid passage 122 of valve 100 from left to right (according to the orientation shown in the figure) and the pressure of the medium on valve core 130 is greater than the opening pressure of valve core 130, valve core 130 rotates away from valve seat sealing surface 121, opening valve 100. When the flow of the medium suddenly stops or reverses, valve core 130 immediately rotates back to valve seat sealing surface 121, closing valve 100, to prevent damage to the device on the pipeline caused by the reverse flow of the medium. Figure 1 Figure 1

[0028] Damping device 110 is used to provide damping for the rotational movement of valve core 130 relative to valve body 120. Damping device 110 comprises an outer shell 111 and a damping control core 112, which will be described in detail below.

[0029] Figures 2A-2E The specific structure of damping device 110 according to one embodiment of the present disclosure is shown, wherein Figure 2A is a perspective view of the damping device 110, Figure 2B is a radial cross-sectional view of the damping device 110 in a first state, Figure 2C is a radial cross-sectional view of the damping device 110 in a second state, Figure 2D is a radial cross-sectional view of the damping device 110 in a third state, Figure 2E is a perspective view of the damping device 110 with one side end cover 220 removed.

[0030] Damping device 110 comprises an outer shell 111, an end cover 220, and a damping control core 112. Outer shell 111 defines a generally cylindrical chamber 240, and two end covers 220 are respectively connected to the two ends of outer shell 111 in the length direction to enclose chamber 240. Chamber 240 is filled with damping liquid, such as silicone oil or other viscous fluid. In order to prevent the damping liquid in chamber 240 from leaking to the outside, sealing elements (not shown) are provided at specified positions in damping device 110.

[0031] Damping control core 112 is arranged in chamber 240 and can rotate relative to outer shell 111. Damping device 110 is used to provide damping for two components that rotate relative to each other. One of the two components that rotate relative to each other is fixedly connected to outer shell 111, and the other is fixedly connected to damping control core 112.

[0032] The housing 111 comprises a partition 213 protruding from the inner wall 211 of the housing 111 to the radially inner side. The partition 213 defines two limit positions 201 at opposite sides in the circumferential direction. The damping control core 112 comprises a substantially cylindrical core shaft 231 and two wings 232 extending from the core shaft 231 to the radially outer side, each wing 232 having a limit surface 233 at one side in the circumferential direction facing the corresponding limit position 201. The radially outer side surface of the wing 232 is a circular arc surface with the axis X of the core shaft 231 as the center line.

[0033] When the damping control core 112 rotates relative to the housing 111 to one of the limit surfaces 233 of the wings 232 reaching its corresponding limit position 201, the limit surface 233 is stopped by one side of the partition 213 to prevent the damping control core 112 from continuing to move. When the damping control core 112 rotates relative to the housing 111 to the limit surface 233 of the other wing 232 reaching its corresponding limit position 201, the limit surface 233 is stopped by the other side of the partition 213 to prevent the damping control core 112 from continuing to move.

[0034] The radially inner side surface of the partition 213 is a circular arc surface in slidable contact with the outer circumferential surface of the core shaft 231, or the radially inner side surface of the partition 213 is a circular arc surface parallel to the outer circumferential surface of the core shaft 231 with a small gap therebetween.

[0035] As an optional configuration, the housing 111 further comprises a protrusion 214 symmetrical to the partition 213, so that the damping control core 112 can be centered or assisted to be centered by the partition 213 and the protrusion 214.

[0036] The partition 213 and the protrusion 214 extend from one side to the other side in the axial direction of the chamber 240 and divide the chamber 240 into two parts, and the two wings 232 are respectively located in the two parts. The damping control core 112 extends from one side to the other side in the axial direction of the chamber 240, and the wings 232 divide the chamber 240 into a proximal cavity 241 close to the limit position 201 and a distal cavity 242 away from the limit position 201.

[0037] The wings 232 are provided with an inner connecting passage 250 connecting the proximal cavity 241 and the distal cavity 242, and the wings 232 and the inner wall 211 of the housing 111 form an outer connecting passage 270 connecting the proximal cavity 241 and the distal cavity 242. The inner connecting passage 250 and the outer connecting passage 270 can controllably connect the proximal cavity 241 and the distal cavity 242, as described below.

[0038] With the movement of the damping control core 112 relative to the housing 111, the volumes of the proximal and distal chambers 241 and 242 change in opposite directions, i.e. one of the volumes of the proximal and distal chambers 241 and 242 increases while the other decreases, and the damping liquid flows from the chamber with the decreased volume to the chamber with the increased volume via the inner and / or outer connecting passages 250 and 270.

[0039] The housing 111 is further provided with two flow-limiting bosses 212 adjacent to the two limit positions 201 respectively. The flow-limiting bosses 212 protrude radially inward from the inner wall 211 of the housing 111, extend from one side to the other side in the axial direction of the chamber 240, and extend in the circumferential direction from the partition 213 to the corresponding wing 232 by a control distance D0, which is an angular distance. When the damping control core 112 rotates relative to the housing 111 to an angular distance D between one of the limit surfaces 233 and the corresponding limit position 201 is the control distance D0, the limit surface 233 reaches the control position.

[0040] The radially inner surface of the flow-limiting boss 212 is a circular arc surface with the axis X of the core shaft 231 as the center line. When the limit surface 233 of one of the wings 232 is located between the corresponding control position and the limit position 201, the radially inner surface of the corresponding flow-limiting boss 212 is parallel to the radially outer surface of the wing 232 with a small gap therebetween, thereby reducing the communication area of the corresponding outer connecting passage 270 to reduce the flow rate of the corresponding outer connecting passage 270. Alternatively, when the limit surface 233 of one of the wings 232 is located between the corresponding control position and the limit position 201, the radially inner surface of the corresponding flow-limiting boss 212 is in sliding contact with the radially outer surface of the wing 232, thereby reducing the communication area of the corresponding outer connecting passage 270 to 0 or close to 0, so that the corresponding outer connecting passage 270 is closed or close to being closed.

[0041] In another embodiment not shown in the drawings, the flow-limiting boss 212 extends in the circumferential direction and is spaced apart from the corresponding limit position 201 by a certain distance. The flow-limiting boss 212 includes a proximal surface close to the corresponding limit position 201 and a distal surface away from the corresponding limit position 201, which are located on both sides of the flow-limiting boss 212 in the circumferential direction respectively. The distance from the proximal surface to the corresponding limit position 201 is not greater than the circumferential length of the radially outer surface of the wing 232, and the distance from the distal surface to the corresponding limit position 201 is the control distance D0.

[0042] Continuing to refer to Figures 2A-2EThe inner connecting passage 250 comprises a proximal passage 251, an intermediate passage 253 and a distal passage 252 connected in sequence. One end of the proximal passage 251 is adjacent to and fluidly connected with the proximal cavity 241, and the other end of the proximal passage 251 is connected with the intermediate passage 253. One end of the distal passage 252 is adjacent to and fluidly connected with the distal cavity 242, and the other end of the distal passage 252 is connected with the intermediate passage 253. The intermediate passage 253 movably has a passage control core 260 disposed therein.

[0043] The intermediate passage 253 and the passage control core 260 extend in the axial direction, i.e. the direction of the axis X of the core shaft 231. The passage control core 260 is cylindrical in at least a part of its length, and the intermediate passage 253 has a long hole in radial section, which extends in the circumferential direction, so that the passage control core 260 is easy to move in the intermediate passage 253. The intermediate passage 253 comprises two ends opposite in the circumferential direction, i.e. a proximal end 2531 close to the proximal passage 251 and a distal end 2532 close to the distal passage 252.

[0044] The shape of the inner connecting passage 250 is configured to be able to increase or decrease the communication area of the inner connecting passage 250 by adjusting the position of the passage control core 260 in the inner connecting passage 250. The proximal passage 251 and the distal passage 252 extend in the circumferential direction, so that the passage control core 260 is pushed to move by the damping liquid flowing into the inner connecting passage 250 when the damping control core 112 rotates relative to the outer shell 111, thereby automatically controlling the flow in the inner connecting passage 250, as will be described later.

[0045] The distal passage 252 is a circular hole and is connected to the distal end 2532 of the intermediate passage 253, and the diameter of the distal passage 252 is the same as or close to the diameter of the cylindrical part of the passage control core 260. Referring to Figure 2C When the passage control core 260 moves to the distal end 2532 of the intermediate passage 253, the passage control core 260 can block all or most of the interface between the distal passage 252 and the intermediate passage 253, at which time the communication area S2 of the inner connecting passage 250 is 0 or close to 0, and the inner connecting passage 250 is closed or only allows a small amount of damping liquid to pass through the inner connecting passage 250.

[0046] The proximal passage 251 is a circular hole, and the diameter of the proximal passage 251 is greater than the diameter of the cylindrical part of the passage control core 260. The proximal passage 251 intersects with the proximal end 2531 of the intermediate passage 253 and extends to the intermediate part of the intermediate passage 253 between the proximal end 2531 and the distal end 2532. Referring to Figure 2DWhen 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 liquid to pass through the inner connecting channel 250.

[0047] It can be understood that in other embodiments not shown in the drawings, the inner connecting channel 250 can be configured in other shapes. For example, in an embodiment, the proximal channel 251 extends substantially in a direction that forms an acute angle with the circumferential direction, and is connected to the middle portion of the intermediate channel 253, the diameter of the proximal channel 251 can 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 can 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 or can only block a small portion of the interface between the proximal channel 251 and the intermediate channel 253, thereby allowing more damping liquid to pass through the inner connecting channel 250.

[0048] In another embodiment, the proximal channel 251 and the intermediate channel 253 extend substantially in the circumferential direction, but only partially overlap in the radial direction, that is, a portion of the proximal channel 251 overlaps a portion of the intermediate channel 253, another portion of the proximal channel 251 is located radially inside or radially outside the intermediate channel 253, and the diameter of the proximal channel 251 can 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 can 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 located radially inside or radially outside the intermediate channel 253, thereby allowing more damping liquid to pass through the inner connecting channel 250.

[0049] In yet another embodiment, the distal channel 252 is configured to extend substantially in a direction that forms an acute angle with the circumferential direction, and the distal channel 252 can be a circular hole or a non-circular hole, as long as it is ensured that when the channel control core 260 moves to the distal end 2532 of the intermediate channel 253, the channel control core 260 can close the inner connecting channel 250 or only allow a small amount of damping liquid to pass through the inner connecting channel 250.

[0050] Continuing to refer to Figures 2A-2EThe internal connecting channel 250 includes a plurality of proximal channels 251 that are arranged generally at intervals along the axial direction and a plurality of distal channels 252 that are arranged generally at intervals along the axial direction, so that the channel control core 260 is subjected to more uniform force in the axial direction, and the movement of the channel control core 260 is smoother and more accurate, and can ensure the flow requirements of the internal connecting channel 250 under large flow conditions, while minimizing the impact on the strength of the damping control core 112.

[0051] In another embodiment not shown, the internal connecting channel 250 includes a plurality of intermediate channels 253 spaced apart in the axial direction and a plurality of channel control cores 260. Each intermediate channel 253 is connected to a proximal channel 251 and a distal channel 252 and has a channel control core 260 built therein.

[0052] The following combination Figures 2B-2D , take the case 111 stationary and the damping control core 112 rotating as an example to illustrate Figures 2A-2E The working principle of the damping device 110 in the illustrated embodiment is shown. It will be appreciated that in other embodiments, the damping device 110 can be configured such that the housing 111 rotates while the damping control core 112 remains stationary, or such that the housing 111 and the damping control core 112 rotate at different speeds and / or in different directions. The end cap 220 can be configured to be fixedly connected to the housing 111 or rotatably connected.

[0053] Reference Figure 2B In the first state, both limit surfaces 233 are not between the corresponding control position and the limit position 201, and Figure 2C and Figure 2D Compared with the state shown, the gap between the wing 232 and the inner wall 211 of the shell 111 is larger, and the communication area of ​​the external connecting channel 270 is increased. When the damping control core 112 rotates relative to the shell 111, the damping liquid can flow faster through the external connecting channel 270 from the chamber with reduced volume in the proximal cavity 241 and the distal cavity 242 to the chamber with increased volume, so that the damping device 110 provides less damping.

[0054] Reference Figure 2C In the second state, the limiting surface 233 of one of the wings 232, for example, the wing 232 at the lower left corner, moves between the corresponding control position and the limit position 201 toward the limit position 201, and the volume of the proximal cavity 241 between the wing 232 and the corresponding limit position 201 decreases accordingly, and the volume of the distal cavity 242 on the other side of the wing 232 increases accordingly. A small gap or sliding fit is formed between the radial inner surface of the corresponding flow limiting boss 212 and the radial outer surface of the wing 232, so that the flow limiting boss 212 and the wing 232 are in contact with each other. Figure 2BIn the shown state, the communication area of the corresponding outer connecting passage 270 is reduced, thereby limiting the flow of damping liquid via the outer connecting passage 270.

[0055] The damping liquid in the proximal volume chamber 241 between the wing 232 and the corresponding limit position 201 flows into the inner connecting passage 250 in the wing 232, and pushes the passage control core 260 towards the distal end 2532 of the intermediate passage 253, so that the communication area of the inner connecting passage 250 is reduced, thereby limiting the flow of damping liquid from the proximal volume chamber 241 with reduced volume to the distal volume chamber 242 with increased volume via the inner connecting passage 250, i.e. limiting the volume change rate of the proximal volume chamber 241 and the distal volume chamber 242, and further limiting the rotation speed of the damping control core 112 relative to the housing 111, so that the damping device 110 provides larger damping. At least one of the outer connecting passage 270 and the inner connecting passage 250 is not completely closed, and / or there is a small gap between the partition 213 and the outer circumferential surface of the core shaft 231, to avoid the damping control core 112 from being stuck, and to ensure that the limit surface 233 of the wing 232 can slowly reach the corresponding limit position 201.

[0056] Referring to Figure 2D In the third state, the limit surface 233 of one of the wings 232, for example, the lower left wing 232, moves away from the limit position 201 between the corresponding control position and the limit position 201, the volume of the proximal volume chamber 241 between the wing 232 and the corresponding limit position 201 increases accordingly, and the volume of the distal volume chamber 242 on the other side of the wing 232 decreases accordingly. The radial inner surface of the corresponding flow limiting boss 212 is separated from the radial outer surface of the wing 232 by a small gap or a sliding fit, so that the damping liquid in the proximal volume chamber 241 can flow into the inner connecting passage 250 in the wing 232 more quickly, and the damping liquid in the distal volume chamber 242 can flow into the inner connecting passage 250 in the wing 232 more slowly. Figure 2B In the shown state, the communication area of the corresponding outer connecting passage 270 is reduced, thereby limiting the flow of damping liquid via the outer connecting passage 270.

[0057] The damping liquid in the distal volume chamber 242 on the other side of the wing 232 flows into the inner connecting passage 250 in the wing 232, and pushes the passage control core 260 towards the proximal end 2531 of the intermediate passage 253, so that the communication area of the inner connecting passage 250 is increased, and the damping liquid can flow from the distal volume chamber 242 with reduced volume to the proximal volume chamber 241 with increased volume via the inner connecting passage 250 more quickly, so that the damping device 110 provides smaller damping.

[0058] Referring to Figures 3A-3C the specific structure and working principle of the damping device 110 according to another embodiment of the present disclosure will be described below. Figure 3A is a radial sectional view of the damping device 110 in the first state, Figure 3Bis a radial sectional view of the damping device 110 in the second state, Figure 3C is a radial sectional view of the damping device 110 in the third state. This embodiment uses the element numbers and parts of the foregoing embodiments, wherein the same numbers are used to represent the same or similar elements, and the description of the same technical content is selectively omitted. The description of the omitted parts can refer to the foregoing embodiments, and this embodiment will not be repeated here.

[0059] In Figures 3A-3C In the illustrated embodiment, the housing 111 includes two partition portions 213, which respectively define two limit positions 201. The damping control core 112 includes a substantially cylindrical core shaft 231 and two wing portions 232 extending radially outward from the core shaft 231. The circumferentially opposite sides of one of the wing portions 232 respectively provide two limit surfaces 233, which respectively face the two limit positions 201 and can be respectively stopped by the corresponding partition portions 213.

[0060] The radially outer surface of each wing portion 232 is a circular arc surface parallel to the inner wall 211 of the housing 111, and has a small gap with the inner wall 211 of the housing 111, or is in slidable contact with the inner wall 211 of the housing 111, thereby playing a role of centering or assisting centering of the damping control core 112.

[0061] The damping control core 112 extends from one side to the other side in the axial direction of the chamber 240, and divides the chamber 240 into two parts, in which the two partition portions 213 are respectively located. The partition portion 213 extends from one side to the other side in the axial direction of the chamber 240, and divides the chamber 240 to form a proximal cavity 241 close to the limit position 201 and a distal cavity 242 away from the limit position 201.

[0062] The partition portion 213 is provided with an inner connecting passage 250 connecting the proximal cavity 241 and the distal cavity 242, and the partition portion 213 and the damping control core 112 form an outer connecting passage 270 connecting the proximal cavity 241 and the distal cavity 242.

[0063] The damping control core 112 is provided with two flow-limiting protrusions 335 adjacent to the two limit surfaces 233, respectively, which protrude outward from the outer surface of the damping control core 112, extend from one side to the other side in the axial direction of the chamber 240, and extend in the circumferential direction from the wing portion 232 to the corresponding partition portion 213 by a control distance D0, which is an angular distance. When the damping control core 112 is rotated relative to the housing 111 to an angular distance D between one of the limit surfaces 233 and the corresponding limit position 201 is the control distance D0, the limit surface 233 reaches the control position.

[0064] The radially outer surface of the flow-limiting protrusion 335 and the radially inner surface of the partition 213 are each arcuate surfaces centered about the axis of the core shaft 231. When one of the limiting surfaces 233 is located between the corresponding control position and the extreme position 201, the radially outer surface of the corresponding flow-limiting protrusion 335 is parallel to the radially inner surface of the corresponding partition 213 and separated by a small gap, thereby reducing the connection area of ​​the corresponding external connecting channel 270 and reducing the flow rate of the corresponding external connecting channel 270. Alternatively, when one of the limiting surfaces 233 is located between the corresponding control position and the extreme position 201, the radially outer surface of the corresponding flow-limiting protrusion 335 slidably contacts the radially inner surface of the corresponding partition 213, thereby reducing the connection area of ​​the corresponding external connecting channel 270 to zero or almost zero, thereby closing or almost closing the corresponding external connecting channel 270.

[0065] In another embodiment (not shown), the flow-limiting protrusion 335 extends circumferentially and is spaced a certain distance from the corresponding limiting surface 233. The flow-limiting protrusion 335 includes a proximal surface proximal to the corresponding wing portion 232 and a distal surface distal to the corresponding wing portion 232, with the proximal surface and the distal surface respectively located on opposite sides of the circumference of the flow-limiting protrusion 335. The distance from the proximal surface to the corresponding limiting surface 233 is no greater than 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 a control distance D0.

[0066] The following explains Figures 3A-3C The operating principle of the damping device 110 of the illustrated embodiment.

[0067] Reference Figure 3A In the first state, both limit surfaces 233 are not between the corresponding control position and the limit position 201, and Figure 3B and Figure 3C Compared with the state shown, the gap between the partition 213 and the damping control core 112 is larger, and the communication area of ​​the external connecting channel 270 is increased. When the damping control core 112 rotates relative to the outer shell 111, the damping liquid can flow faster through the external connecting channel 270 from the chamber with reduced volume in the proximal cavity 241 and the distal cavity 242 to the chamber with increased volume, so that the damping device 110 provides less damping.

[0068] Reference Figure 3BIn the second state, one of the limiting surfaces 233, for example, the limiting surface 233 on the right side of the lower left wing 232 moves toward the limit position 201 from the corresponding control position, the volume of the proximal cavity 241 between the limiting surface 233 and the corresponding partition 213 decreases, the volume of the distal cavity 242 on the other side of the partition 213 increases, and the radial outer surface of the corresponding flow limiting bump 335 and the radial inner surface of the corresponding partition 213 are in close clearance or sliding fit, so that compared with the state shown in the figure, the communication area of the corresponding outer connecting channel 270 is reduced, thereby limiting the flow of damping liquid through the outer connecting channel 270. Figure 3A The damping liquid in the proximal cavity 241 between the limiting surface 233 and the corresponding partition 213 flows into the inner connecting channel 250 of the partition 213 and pushes the channel control core 260 toward the distal end 2532 of the middle channel 253, so that the communication area of the inner connecting channel 250 is reduced, thereby limiting the flow of damping liquid from the proximal cavity 241 with reduced volume to the distal cavity 242 with increased volume through the inner connecting channel 250, i.e., limiting the volume change rate of the proximal cavity 241 and the distal cavity 242, and further limiting the rotation speed of the damping control core 112 relative to the outer shell 111, so that the damping device 110 provides greater damping. At least one of the outer connecting channel 270 and the inner connecting channel 250 is not completely closed, and / or there is a small gap between the radial outer surface of the wing 232 and the inner wall 211 of the outer shell 111, to avoid the damping control core 112 from being stuck, so that the limiting surface 233 can slowly reach the corresponding limit position 201.

[0069] The damping liquid in the proximal cavity 241 between the limiting surface 233 and the corresponding partition 213 flows into the inner connecting channel 250 of the partition 213 and pushes the channel control core 260 toward the distal end 2532 of the middle channel 253, so that the communication area of the inner connecting channel 250 is reduced, thereby limiting the flow of damping liquid from the proximal cavity 241 with reduced volume to the distal cavity 242 with increased volume through the inner connecting channel 250, i.e., limiting the volume change rate of the proximal cavity 241 and the distal cavity 242, and further limiting the rotation speed of the damping control core 112 relative to the outer shell 111, so that the damping device 110 provides greater damping. At least one of the outer connecting channel 270 and the inner connecting channel 250 is not completely closed, and / or there is a small gap between the radial outer surface of the wing 232 and the inner wall 211 of the outer shell 111, to avoid the damping control core 112 from being stuck, so that the limiting surface 233 can slowly reach the corresponding limit position 201.

[0070] Referring to Figure 3C In the third state, one of the limiting surfaces 233, for example, the limiting surface 233 on the right side of the lower left wing 232 moves away from the limit position 201 from the corresponding control position, the volume of the proximal cavity 241 between the limiting surface 233 and the corresponding partition 213 increases, the volume of the distal cavity 242 on the other side of the partition 213 decreases, and the radial outer surface of the corresponding flow limiting bump 335 and the radial inner surface of the corresponding partition 213 are in close clearance or sliding fit, so that compared with the state shown in the figure, the communication area of the corresponding outer connecting channel 270 is reduced, thereby limiting the flow of damping liquid through the outer connecting channel 270. Figure 3A The damping liquid in the proximal cavity 241 between the limiting surface 233 and the corresponding partition 213 flows into the inner connecting channel 250 of the partition 213 and pushes the channel control core 260 toward the distal end 2532 of the middle channel 253, so that the communication area of the inner connecting channel 250 is reduced, thereby limiting the flow of damping liquid from the proximal cavity 241 with reduced volume to the distal cavity 242 with increased volume through the inner connecting channel 250, i.e., limiting the volume change rate of the proximal cavity 241 and the distal cavity 242, and further limiting the rotation speed of the damping control core 112 relative to the outer shell 111, so that the damping device 110 provides greater damping. At least one of the outer connecting channel 270 and the inner connecting channel 250 is not completely closed, and / or there is a small gap between the radial outer surface of the wing 232 and the inner wall 211 of the outer shell 111, to avoid the damping control core 112 from being stuck, so that the limiting surface 233 can slowly reach the corresponding limit position 201.

[0071] The damping liquid in the distal cavity 242 on the other side of the partition 213 flows into the inner connecting channel 250 in the partition 213, and pushes the channel control core 260 towards the proximal end 2531 of the middle channel 253, so that the connecting area of the inner connecting channel 250 is increased, so that the damping liquid can flow from the distal cavity 242 with a reduced volume to the proximal cavity 241 with an increased volume via the inner connecting channel 250 more quickly, so that the damping device 110 provides smaller damping.

[0072] With reference to Figure 1 The valve 100 further comprises a connecting rod 150 fixedly connected with the valve body 120. The connecting rod 150 penetrates through the damping control core 112 and is fixedly connected with the damping control core 112, so as to fixedly connect the valve body 120 with the damping control core 112 of the damping device 110. The end of the arm 140 connected with the valve body 120 provides the housing 111 of the damping device 110, so as to fixedly connect the valve core 130 with the housing 111 of the damping device 110.

[0073] Therefore, when the valve core 130 rotates relative to the valve body 120, the damping device 110 controls the speed of change of the volumes of the proximal cavity 241 and the distal cavity 242 by controlling the flow of the inner connecting channel 250 and / or the outer connecting channel 270, so as to adjust the speed of movement of the housing 111 and the damping control core 112 relative to each other, i.e. the speed of rotation of the valve core 130 relative to the valve body 120. The two limit positions 201 of the damping device 110 correspond to the closed position and the maximum opening position of the valve core 130 respectively.

[0074] When the valve core 130 moves towards the closed position near the closed position, or the valve core 130 moves towards the maximum opening position near the maximum opening position, the state of the damping device 110 corresponds to the second state described above, at this time the damping device 110 provides larger damping, so as to make the valve core 130 slowly reach the full-closed position or the maximum opening position, avoiding the valve core 130 from colliding with the valve seat sealing surface 121 or the maximum opening limit.

[0075] When the valve core 130 opens at the moment of opening from the full-closed position or reversely closes at the moment of closing from the maximum opening position, the state of the damping device 110 corresponds to the third state described above, at this time the damping device 110 provides smaller damping, so as to ensure the sensitive response of the valve core 130.

[0076] When the valve core 130 is not near the full-closed position and not near the maximum opening position, the state of the damping device 110 corresponds to the first state described above, at this time the damping device 110 provides smaller damping, so as to ensure the sensitive response of the valve core 130.

[0077] The valve 100 according to the embodiments of the present disclosure can avoid frequent impact of the valve core 130 with the valve seat sealing surface 121 and / or the maximum opening limit, can reduce or avoid the abnormal sound of mechanical impact, and can prolong the service life of the valve while ensuring the valve response sensitivity.

[0078] The damping device 110 according to the embodiments of the present disclosure can provide damping that meets the needs in different states according to the relative position and relative movement direction of the housing 111 and the damping control core 112, and the damping device 110 has simple structure and convenient operation, and can be used not only in check valves but also in other types of valves or other relative rotating components.

[0079] It is worth noting that, although in the embodiments shown Figure 1 In the embodiments shown, the valve body 120 is fixedly connected with the damping control core 112 of the damping device 110, and the valve core 130 is fixedly connected with the housing 111 of the damping device 110, but in other embodiments, the valve body 120 can be fixedly connected with the housing 111 of the damping device 110, and the valve core 130 can be fixedly connected with the damping control core 112 of the damping device 110. In addition, although in the above-mentioned embodiments, the damping device 110 is provided with two limit positions 201, in other embodiments, according to the needs of actual application, the damping device can be provided with only one limit position, and the number of limit surfaces, wing parts, inner connecting channels, outer connecting channels, etc. is adjusted correspondingly.

[0080] Although the present disclosure has been described in connection with the examples of the embodiments outlined above, various alternatives, modifications, variations, improvements, and / or substantially equivalent aspects can be apparent to those of ordinary skill in the art. In addition, the technical effects and / or technical problems described in the specification are exemplary and not limiting; therefore, the disclosure disclosed in the specification can be used to solve other technical problems and have other technical effects and / or can solve other technical problems. Therefore, the examples of the embodiments of the present disclosure as stated above are intended to be illustrative rather than restrictive. Various changes can be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, variations, improvements, and / or substantially equivalent aspects.

Claims

1. A damping device (110), comprising: a housing (111) defining a substantially cylindrical chamber (240) filled with a damping liquid, the housing (111) including a partition (213) protruding from an inner wall (211) of the housing (111) to define an extreme position (201); a damping control core (112), the damping control core (112) being disposed in the chamber (240) and capable of rotating relative to the housing (111), the damping control core (112) having a wing portion (232), the wing portion (232) having a limiting surface (233) facing the extreme position (201) and capable of being stopped by the partition portion (213), wherein when a distance (D) between the limiting surface (233) and the extreme position (201) is a control distance (D0), the limiting surface (233) reaches the control position; The chamber (240) includes a proximal accommodating cavity (241) close to the extreme position (201) and a distal accommodating cavity (242) away from the extreme position (201); the proximal accommodating cavity (241) and the distal accommodating cavity (242) are separated by the partition (213) or the wing (232); and the volumes of the proximal accommodating cavity (241) and the distal accommodating cavity (242) change in opposite directions as the damping control core (112) moves relative to the housing (111); wherein an internal connecting channel (250) is provided in the wing portion (232), and an external connecting channel (270) is provided between the wing portion (232) and the inner wall (211); or an internal connecting channel (250) is provided in the partition portion (213), and an external connecting channel (270) is provided between the partition portion (213) and the damping control core (112); and wherein the internal connecting channel (250) and the external connecting channel (270) are capable of controllably connecting the proximal cavity (241) and the distal cavity (242); Wherein, the damping device (110) is configured as follows: When the limiting surface (233) is not between the control position and the limit position (201), the communication area of ​​the external connection channel (270) is increased so that the damping device (110) provides smaller damping; When the limiting surface (233) moves between the control position and the limit position (201) toward the limit position (201), the communication area of ​​the external connecting channel (270) and the internal connecting channel (250) is reduced, so that the damping device (110) provides greater damping; and When the limiting surface (233) moves away from the limit position (201) between the control position and the limit position (201), the connection area of ​​the external connecting channel (270) is reduced, and the connection area of ​​the internal connecting channel (250) is increased, so that the damping device (110) provides smaller damping.

2. The damping device (110) according to claim 1, characterized in that Also includes: a flow-limiting boss (212), the flow-limiting boss (212) protruding from the inner wall (211) of the housing (111) and extending in a circumferential direction, the flow-limiting boss (212) extending the control distance (D0) from the partition (213) toward the wing portion (232), or the flow-limiting boss (212) includes a proximal surface close to the extreme position (201) and a distal surface away from the extreme position (201), wherein the distance from the proximal surface to the extreme position (201) is not greater than the circumferential length of the radially outer surface of the wing portion (232), and the distance from the distal surface to the extreme position (201) is the control distance (D0); and The external connection channel (270) can have its connection area reduced by the flow-limiting boss (212).

3. The damping device (110) according to claim 2, characterized in that: The damping control core (112) comprises a core shaft (231) and two wings (232) extending radially outward from the core shaft (231); opposite sides of the partition (213) respectively define two extreme positions (201); and the housing (111) is provided with two flow-limiting bosses (212) respectively adjacent to the two extreme positions (201).

4. The damping device (110) according to claim 1, characterized in that Also includes: a flow-limiting protrusion (335), the flow-limiting protrusion (335) protruding from the outer surface of the damping control core (112) and extending in a circumferential direction, the flow-limiting protrusion (335) extending the control distance (D0) from the wing portion (232) toward the partition portion (213), or the flow-limiting protrusion (335) includes a proximal surface close to the wing portion (232) and a distal surface away from the wing portion (232), wherein the distance from the proximal surface to the limiting surface (233) is not greater than the circumferential length of the radial inner surface of the partition portion (213), and the distance from the distal surface to the limiting surface (233) is the control distance (D0); and The external connection channel (270) can have its connection area reduced by the flow-limiting protrusion (335).

5. The damping device (110) according to claim 4, characterized in that: The damping control core (112) comprises a core shaft (231) and at least one wing portion (232) extending radially outward from the core shaft (231); two limiting surfaces (233) are provided on opposite sides of one wing portion (232) of the at least one wing portion (232); the damping control core (112) is provided with two flow-limiting protrusions (335) respectively adjacent to the two limiting surfaces (233); and the housing (111) comprises two partitions (213); and the two partitions (213) respectively define the two extreme positions (201).

6. The damping device (110) according to any one of claims 1 to 5, characterized in that Also includes: a channel control core (260), the channel control core (260) being movably disposed in the inner connecting channel (250); The shape of the internal connecting channel (250) is configured to be able to increase or decrease the communication area of ​​the internal connecting channel (250) by adjusting the position of the channel control core (260) in the internal connecting channel (250).

7. The damping device (110) according to claim 6, characterized in that: The internal connecting channel (250) includes a proximal channel (251), an intermediate channel (253) and a distal channel (252) connected in sequence, the proximal channel (251) is adjacent to the proximal cavity (241) and is fluidically connected to the proximal cavity (241), the distal channel (252) is adjacent to the distal cavity (242) and is fluidically connected to the distal cavity (242), and the channel control core (260) is movably arranged in the intermediate channel (253).

8. The damping device (110) according to claim 7, characterized in that: The intermediate channel (253) and the channel control core (260) extend substantially in the axial direction, and the proximal channel (251) and the distal channel (252) extend substantially in the circumferential direction or substantially in a direction forming an acute angle with the circumferential direction. When the channel control core (260) moves to one end (2531) of the intermediate channel (253) close to the proximal channel (251), the communication area of ​​the internal connecting channel (250) is S1; when the channel control core (260) moves to one end (2532) of the intermediate channel (253) close to the distal channel (252), the communication area of ​​the internal connecting channel (250) is S2, wherein S1 is greater than S2.

9. The damping device (110) according to claim 8, characterized in that: The channel control core (260) is cylindrical over at least a portion of its length, and the radial cross section of the intermediate channel (253) is a long hole, which substantially extends along the circumferential direction.

10. The damping device (110) according to claim 8, characterized in that: The inner connecting channel (250) includes a plurality of proximal channels (251), and the plurality of proximal channels (251) are generally spaced apart along the axial direction; and / or The inner connecting channel (250) includes 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, characterized in that: The reduction of the communication area of ​​the external connection channel (270) includes the closure of the external connection channel (270), and the reduction of the communication area of ​​the internal connection channel (250) includes the closure of the internal 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 outer shell (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).

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