Inline through-flow self-energizing viscous damper

Abstract

The utility model relates to a kind of inline communication self-accelerating viscous damper, comprising: cylinder, including first chamber and second chamber, the diameter of first chamber is greater than second chamber;Piston, is located in first chamber and can be moved along the axial direction of first chamber relative to cylinder, the part of first chamber located on the two sides of piston is not communicated each other;Damping block, be located in second chamber and be limited to move along the axial direction of cylinder relative to cylinder, the part of second chamber located on the two sides of damping block is communicated by the damping hole on damping block;Piston rod, with piston fixed connection and with first chamber coaxial, pass through damping block and can be moved axially relative to damping block, both ends of piston rod are all worn out cylinder and can be moved along the axial direction relative to cylinder;The part of second chamber located on the side of damping block away from piston, and the part of first chamber located on the side of piston away from damping block, are communicated by the channel in piston rod.The damper of the application is more sensitive to small structural deformation, and the damper can fully play the shock-absorbing performance under small structural deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of dampers, specifically to an internally connected self-increasing viscous damper. Background Technology

[0002] Viscous dampers are made based on the principle that fluid motion, especially the throttling resistance generated when fluid passes through a throttling orifice, and are a type of damper that is related to the piston's motion speed.

[0003] Traditional viscous dampers are not sensitive to small structural deformations. To address this, a displacement amplification structure is usually installed in conjunction with the viscous damper to amplify and transfer structural deformations to the viscous damper, thereby enabling the damper to fully perform its function.

[0004] Displacement amplification structures increase the overall volume of damping devices, which is not conducive to widespread adoption. Utility Model Content

[0005] Based on the above description, this utility model provides an internally connected self-increasing viscous damper to solve the problem that the use of displacement amplification structure in related technologies will increase the overall volume of the damping device, which is not conducive to its widespread application.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This application provides an in-circuit self-increasing viscous damper, comprising: A sealed cylinder body, wherein the internal cavity of the cylinder body includes a first chamber and a second chamber distributed along the axial direction and having different diameters, wherein the diameter of the first chamber is larger than the diameter of the second chamber; A piston is disposed in the first chamber and is movable relative to the cylinder body along the axial direction of the first chamber, wherein the portions of the first chamber located on both sides of the piston in the axial direction are not connected to each other. A damping block is disposed in the second chamber and is restricted to move relative to the cylinder body along the cylinder body axis. The portions of the second chamber located on both sides of the damping block in the axial direction are connected through damping holes on the damping block. A piston rod is fixedly connected to the piston and coaxial with the first chamber. The piston rod passes through the damping block and is axially movable relative to the damping block. A seal is formed between the piston rod and the damping block. At least one end of the piston rod extends out of the cylinder and is axially movable relative to the cylinder. The second chamber is located on the side of the damping block away from the piston, and the first chamber is located on the side of the piston away from the damping block, and they are connected by a channel in the piston rod.

[0007] Preferably, the channel includes a main body segment and connecting holes located at both ends of the main body segment. The main body segment is coaxial with the piston rod. One end of the main body segment is connected to the portion of the second chamber located on the side of the damping block away from the piston through the connecting holes. The other end of the main body segment is connected to the portion of the second chamber located on the side of the damping block away from the piston through the connecting holes.

[0008] Preferably, each end of the main body segment is provided with a plurality of connecting holes, and the plurality of connecting holes located at one end of the main body segment are evenly spaced along the circumference of the piston rod.

[0009] Preferably, the connecting hole includes a connecting end and an inlet / outlet end, the connecting end is connected to the main body segment, the connecting end and the inlet / outlet end are spaced apart along the piston rod axis, and the connecting end is closer to the middle of the main body segment.

[0010] Preferably, the diameter of the connecting hole gradually increases in the direction away from the main body segment.

[0011] Preferably, the inlet and outlet edges of the channel are chamfered.

[0012] Preferably, the damping hole axis is parallel to the cylinder axis and passes through both ends. There are multiple damping holes, and the multiple damping holes are evenly spaced along the circumference of the damping block.

[0013] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects: 1. This application constructs a cylinder body comprising a first chamber and a second chamber with different diameters. A piston and a damping block are respectively installed in the first and second chambers. The damping block has damping holes for the damping medium to pass through, generating damping force as the damping medium passes through the damping holes. When the piston rod and cylinder are connected to two parts of the building structure, displacement of the building structure drives the piston rod to move relative to the cylinder body. The piston rod drives the piston to move relative to the cylinder body. The piston movement compresses the damping medium, causing it to enter the second chamber directly from the first chamber or through a channel in the piston rod. As the damping medium flows within the second chamber, it generates damping force through the damping holes on the damping block. Because the diameter of the first chamber is larger than that of the second chamber, when the piston moves, the flow velocity of the damping medium in the second chamber is greater than that in the first chamber. This achieves the purpose of increasing the speed of the damping medium, allowing it to flow through the damping orifice at a higher velocity and generate a greater damping force. Therefore, even when the piston moves a small distance, the damping medium can still flow through the damping orifice at a higher velocity and generate a larger damping force. This makes the damper more sensitive to small structural deformations, ensuring that the damper can fully exert its damping performance under small structural deformations. The internal channel of the piston rod connects the previously unconnected parts of the first and second chambers, forming a circulation loop for the damping medium. This ensures the normal operation of the damper, and the channel is located inside the piston rod, so it does not affect the appearance and size of the damper.

[0014] 2. By having both ends of the piston rod extend out of the cylinder, this application ensures that the volume changes of the chambers on both sides of the piston remain consistent when the piston rod drives the piston to move axially. This avoids the piston movement resistance caused by the vacuum degree resulting from the difference in volume changes of the chambers on both sides of the piston, thus ensuring good performance of the damper. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of the internally connected self-increasing viscous damper provided in the embodiment of this utility model, wherein the inner channel of the piston rod is the first embodiment; Figure 2 This is a schematic diagram of the piston rod in the internally connected self-increasing viscous damper provided in an embodiment of the present invention, wherein the channel is a second implementation method.

[0016] Explanation of reference numerals in the attached figures: 1. Cylinder block; 11. Main cylinder barrel; 12. Auxiliary cylinder barrel; 13. First chamber; 14. Second chamber; 141. First segment; 142. Second segment; 143. Third segment; 15. End cap; 2. Piston; 3. Piston rod; 31. Channel; 311. Main body segment; 312. Connecting hole; 4. Damping block; 5. Guide sleeve; 6. Connecting cylinder barrel; 7. Spherical bearing; 8. Limiting ring. Detailed Implementation

[0017] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0020] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0021] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0022] Reference Figure 1As shown, this application provides an internally connected self-increasing viscous damper, including a sealed cylinder 1, a piston 2, a damping block 4, and a piston rod 3. The inner cavity of the cylinder 1 includes a first chamber 13 and a second chamber 14 distributed axially and having different diameters. The diameter of the first chamber 13 is larger than the diameter of the second chamber 14. The piston 2 is located in the first chamber 13 and can move axially relative to the cylinder 1 along the first chamber 13. The portions of the first chamber 13 located on both sides of the piston 2 are not interconnected. The damping block 4 is located in the second chamber 14 and is restricted from moving axially relative to the cylinder 1. The portions of the second chamber 14 located on both sides of the damping block 4 are connected through damping holes on the damping block 4. The piston rod 3 is fixedly connected to the piston 2 and coaxial with the first chamber 13. The piston rod 3 passes through the damping block 4 and can move axially relative to the damping block 4. A seal is formed between the piston rod 3 and the damping block 4. Both ends of the piston rod 3 protrude from the cylinder 1 and can move axially relative to the cylinder 1.

[0023] The second chamber 14 is located on the side of the damping block 4 away from the piston 2, and the first chamber 13 is located on the side of the piston 2 away from the damping block 4, and they are connected through the channel 31 in the piston rod 3.

[0024] Reference Figure 1 As shown, specifically, the cylinder includes a main cylinder 11 and a secondary cylinder 12 coaxially arranged. A first chamber 13 is located inside the main cylinder 11, and a second chamber 14 is located inside the secondary cylinder 12. One end of the main cylinder 11 and the secondary cylinder 12 are connected and form a seal. The ends of the main cylinder 11 and the secondary cylinder 12 that are far apart from each other are closed by an end cap 15, thereby forming a sealed cylinder body 1. During processing, the main cylinder 11 and the secondary cylinder 12 are made from a single piece of steel, divided into two sections, machined separately, and then welded together to form a seal.

[0025] Reference Figure 1 As shown, the piston 2 is disposed inside the main cylinder 11 and can move relative to the main cylinder 11 along the axial direction of the main cylinder 11. A seal is formed between the piston 2 and the inner wall of the main cylinder 11 so that the parts of the first chamber 13 located on both sides of the piston 2 in the axial direction are not connected to each other. In this way, when the piston 2 moves, it squeezes the damping medium filled in the cylinder 1 to make it flow.

[0026] Reference Figure 1As shown, the second chamber 14 further includes a first segment 141, a second segment 142, and a third segment 143 arranged sequentially along the axial direction away from the first chamber 13. The diameter of the second segment 142 is smaller than the diameter of the first segment 141 and larger than the diameter of the third segment 143. The damping block 4 is disposed in the second segment 142 and has the same diameter as the second segment 142. The damping block 4 abuts against the stepped surfaces between the second segment 142 and the third segment 143. A limiting ring 8 coaxial with the first segment 141 is provided. The limiting ring 8 is fixed to the cylinder body 1 and has an inner diameter smaller than the diameter of the damping block 4. The limiting ring 8 abuts against the damping block 4 to restrict the movement of the damping block 4 relative to the cylinder body 1 along the axial direction.

[0027] Specifically, when machining the second chamber 14 of the auxiliary cylinder 12, a first segment 141, a second segment 142, and a third segment 143 are formed, making the second chamber 14 have a stepped hole shape. The damping block 4 is disposed in the second segment 142 and abuts against the stepped surface between the second segment 142 and the third segment 143. At the same time, a limiting ring 8 and the damping block 4 are disposed in the first segment 141 for abutment. With the cooperation of the limiting ring 8 and the stepped surface between the second segment 142 and the third segment 143, the damping block 4 is relatively fixed to the cylinder body 1.

[0028] Reference Figure 1 As shown, furthermore, the outer wall of the limiting ring 8 and the side wall of the first segment 141 are provided with mutually mating threads, and the limiting ring 8 is threadedly connected to the cylinder body 1. The limiting ring 8 is threadedly fixed to the auxiliary cylinder 12 of the cylinder body 1. When installing the damping block 4, after the damping block 4 is placed into the second segment 142, the limiting ring 8 is installed into the first segment 141 and tightened to fix the damping block 4, making the installation of the damping block 4 more convenient. Moreover, the side walls of the auxiliary cylinder 12 and the main cylinder 11 are both integral structures, which improves the overall structural strength of the cylinder body 1.

[0029] Reference Figure 1 As shown, further, the inner diameter of the limiting ring 8 is set to be the same as the diameter of the third segment 143. After the damping block 4 and the limiting ring 8 are installed in the auxiliary cylinder 12, the inner side of the limiting ring 8 is directly connected to the first chamber 13, and the flow cross-sectional diameter of the damping medium in the second chamber 14 is the same as the inner diameter of the limiting ring 8.

[0030] Reference Figure 1 As shown, the damping hole on the damping block 4 is parallel to the axis of the cylinder 1 and is open at both ends. There are multiple damping holes, which are evenly distributed around the circumference of the damping block 4, that is, the damping holes pass through both ends of the damping block 4.

[0031] Reference Figure 1As shown, the piston rod 3 is coaxial with the main cylinder 11 and fixedly connected to the piston 2. One end of the piston rod 3 passes through the end cap 15 at the end of the main cylinder 11 and forms a seal with the end cap 15. The other end passes through the end cap 15 at the end of the auxiliary cylinder 12 and forms a seal with the end cap 15. Furthermore, a guide sleeve 5 is provided inside the main cylinder 11 near the end cap 15. The piston rod 3 passes through the guide sleeve 5 and forms a seal with the guide sleeve 5. The cooperation between the guide sleeve 5 and the piston 2 can improve the stability of the piston rod 3's movement.

[0032] Reference Figure 1 As shown, the piston rod 3 is connected to a spherical bearing 7 at one end near the main cylinder 11 for connection to the building structure. A connecting cylinder 6 is provided at the end of the auxiliary cylinder 12 away from the main cylinder 11. One end of the connecting cylinder 6 is fixedly connected to the auxiliary cylinder 12 and forms a seal. The other end of the connecting cylinder 6 is connected to the spherical bearing 7 for connection to the building structure. When the two parts of the building structure move relative to each other, the piston rod 3 and the cylinder 1 move relative to each other. The movement of the piston rod 3 drives the piston 2 to move and compress the damping medium.

[0033] With this configuration, the piston rod 3 traverses the portion of the first chamber 13 and the second chamber 14 located between the piston 2 and the damping block 4, as well as the portion of the first chamber 13 located on the side of the piston 2 away from the damping block 4. This ensures that when the piston 2 moves relative to the cylinder 1 with the piston rod 3, the volume changes of the chambers on both sides of the piston 2 remain consistent. This completely avoids the resistance to piston 2 movement caused by the vacuum degree resulting from the difference in volume changes of the chambers on both sides of the piston 2, thus giving the damper better performance.

[0034] The orifice 31 inside the piston rod 3 serves as a channel connecting the unconnected parts of the first chamber 13 and the second chamber 14, forming a circulation loop of the damping medium inside the cylinder 1 to ensure the normal operation of the damper. The orifice 31 is located inside the piston rod 3 and does not affect the appearance and volume of the damper.

[0035] Reference Figure 1 and Figure 2 As shown, specifically, the channel 31 includes a main body section 311 and connecting holes 312 located at both ends of the main body section 311. The main body section 311 is coaxial with the piston rod 3. One end of the main body section 311 is connected to the portion of the second chamber 14 located on the side of the damping block 4 away from the piston 2 through the connecting holes 312, and the other end of the main body section 311 is also connected to the portion of the second chamber 14 located on the side of the damping block 4 away from the piston 2 through the connecting holes 312. The main body section 311 being coaxial with the piston rod 3 ensures that the strength of the piston rod 3 remains uniform, avoiding stress concentration.

[0036] The inlet and outlet edges of the channel 31 are chamfered. This feature reduces cavitation of the piston rod 3 in localized turbulence, ensuring the stability of the piston rod strength during long-term operation of the damper.

[0037] In this embodiment, the cross-sections of the main body segment 311 and the connecting hole 312 are both circular.

[0038] Reference Figure 1 As shown, in the first embodiment, each end of the main body segment 311 is provided with a connecting hole 312, and the axis of the connecting hole 312 intersects the axis of the piston rod 3 perpendicularly.

[0039] Reference Figure 2 As shown, in the second embodiment, each end of the main body segment 311 is provided with multiple connecting holes 312, and the multiple connecting holes 312 located at one end of the main body segment 311 are evenly spaced along the circumference of the piston rod 3. This arrangement allows the damping medium to enter the channel 31 from multiple regions along the circumference of the piston rod 3, or to flow from the channel 31 to multiple regions along the circumference of the piston rod 3, thereby ensuring that the pressure of the cylinder 1 remains consistent in all regions along the circumference of the piston rod 3. For the second chamber 14, the pressure of the damping medium is uniform in all regions along the circumference of the piston rod 3 in the second region, ensuring that the damping medium passes evenly through the multiple damping holes. The figure illustrates two connecting holes 312 at each end of the main body segment 311.

[0040] Reference Figure 2 As shown, in this second embodiment, the connecting hole 312 includes a connecting end and an inlet / outlet end. The connecting end communicates with the main body section 311, and the connecting end and the inlet / outlet end are spaced apart along the piston rod 3 axis, with the connecting end closer to the middle of the main body section 311. Specifically, the connecting hole 312 is configured such that its axis intersects the axis of the main body section 311, and the connecting end communicates with the end of the main body section 311, making the angle between the axis of the connecting hole 312 and the axis of the main body section 311 obtuse. This reduces the influence of the corner between the connecting hole 312 and the main body section 311 on the resistance of the damping medium flowing in the channel 31, thereby reducing the flow resistance of the damping medium.

[0041] Reference Figure 2 As shown, in the second embodiment, the diameter of the connecting hole 312 gradually increases in the direction away from the main body section 311. This arrangement allows the damping medium flowing out of the main body section 311 to diffuse into the cylinder body 1, avoiding impact on the side wall of the cylinder body 1.

[0042] In actual design, it is necessary to ensure that the connecting hole 312 always maintains communication with the corresponding chamber when the piston rod 3 moves axially, and the design of the channel 31 must ensure that the structural strength of the piston rod 3 meets the requirements.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An internally connected self-increasing viscous damper, characterized in that, include: A sealed cylinder (1) has an inner cavity comprising a first chamber (13) and a second chamber (14) distributed along the axial direction and having different diameters, wherein the diameter of the first chamber (13) is larger than the diameter of the second chamber (14). Piston (2), the piston (2) is disposed in the first chamber (13) and can move relative to the cylinder (1) along the axial direction of the first chamber (13), the portions of the first chamber (13) located on both sides of the piston (2) in the axial direction are not connected to each other; Damping block (4), the damping block (4) is disposed in the second chamber (14) and is restricted to move relative to the cylinder (1) along the axial direction of the cylinder (1), and the portions of the second chamber (14) located on both sides of the damping block (4) in the axial direction are connected through the damping holes on the damping block (4); A piston rod (3) is fixedly connected to the piston (2) and coaxial with the first chamber (13). The piston rod (3) passes through the damping block (4) and can move axially relative to the damping block (4). A seal is formed between the piston rod (3) and the damping block (4). Both ends of the piston rod (3) protrude from the cylinder body (1) and can move axially relative to the cylinder body (1). The second chamber (14) is located on the side of the damping block (4) away from the piston (2), and the first chamber (13) is located on the side of the piston (2) away from the damping block (4), and they are connected by a channel (31) in the piston rod (3).

2. The in-line self-increasing viscous damper according to claim 1, characterized in that: The channel (31) includes a main body section (311) and connecting holes (312) located at both ends of the main body section (311). The main body section (311) is coaxial with the piston rod (3). One end of the main body section (311) is connected to the portion of the second chamber (14) located on the side of the damping block (4) away from the piston (2) through the connecting hole (312). The other end of the main body section (311) is connected to the portion of the second chamber (14) located on the side of the damping block (4) away from the piston (2) through the connecting hole (312).

3. The in-line self-increasing viscous damper according to claim 2, characterized in that: The main body segment (311) is provided with a plurality of connecting holes (312) at each end, and the plurality of connecting holes (312) located at one end of the main body segment (311) are evenly spaced along the circumference of the piston rod (3).

4. The internally connected self-increasing viscous damper according to claim 2, characterized in that: The connecting hole (312) includes a connecting end and an inlet / outlet end. The connecting end is connected to the main body section (311). The connecting end and the inlet / outlet end are spaced apart along the axial direction of the piston rod (3), and the connecting end is closer to the middle of the main body section (311).

5. The in-line self-increasing viscous damper according to claim 2, characterized in that: The diameter of the connecting hole (312) gradually increases in the direction away from the main body segment (311).

6. The in-line self-increasing viscous damper according to claim 1, characterized in that: The inlet and outlet edges of the channel (31) are chamfered.

7. The in-line self-increasing viscous damper according to claim 1, characterized in that: The damping hole axis is parallel to the cylinder (1) axis and is through at both ends. There are multiple damping holes, and the multiple damping holes are evenly spaced along the circumference of the damping block (4).

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