Self-resetting viscous damper

Abstract

The invention relates to the technical field of dampers, in particular to a self-resetting viscous damper which comprises a stainless steel shell, a viscous damper body is arranged at one end of the interior of the stainless steel shell, a centering plate is arranged in the stainless steel shell, and two symmetrically-arranged reset springs are arranged on each of the two sides of the centering plate. And a pre-tightening force adjusting mechanism is arranged in the stainless steel shell, first limiting mechanisms are arranged on the two sides of the centering plate correspondingly, an operating mechanism is arranged in the stainless steel shell, and second limiting mechanisms are arranged at the two ends in the stainless steel shell correspondingly. By means of the arranged first limiting mechanism, after the viscous damper is fixed, limiting of the centering plate and the piston rod is relieved, the initial position of the piston rod is centered, when a subsequent wall vibrates, reset springs on the two sides can be symmetrically stressed, the vibrated piston rod can be reset to the initial middle position to the maximum extent, and the vibration effect is improved. Therefore, the residual displacement can be better eliminated.

Description

Technical Field

[0001] This invention relates to the field of damper technology, specifically to a self-resetting viscous damper. Background Technology

[0002] Viscous dampers are made based on the principle that fluid generates viscous resistance when passing through a throttling orifice. They are a type of velocity-dependent energy dissipation and vibration reduction device, and are widely used in high-rise buildings, bridges, seismic retrofitting of building structures, and vibration reduction of industrial pipeline equipment.

[0003] A viscous damper consists of a cylinder, piston, damping orifice, piston rod, and medium. The piston reciprocates within the cylinder, which is filled with a fluid damping medium. When relative motion occurs between the piston and the cylinder, the pressure difference across the piston forces the medium through the damping orifice, generating a damping force. In existing technologies, to address the "residual deformation" of the viscous damper structure after earthquakes or strong winds, a return spring is installed at one end of the damper to provide a "correcting" force and mitigate the damage caused by residual deformation. However, the addition of the return spring causes the piston rod to shift laterally during transport and handling. After installation and fixing to a wall, the initial position of the piston rod in the viscous damper is already deviated. During subsequent wall vibrations, the return springs cannot be symmetrically stressed, making it difficult to return to the initial neutral position after vibration, thus failing to effectively eliminate residual displacement. Summary of the Invention

[0004] The purpose of this invention is to provide a self-resetting viscous damper to solve the problem mentioned in the background art that, due to the addition of a reset spring, the initial position of the piston rod in the viscous damper will deviate due to collision after installation and fixing to the wall, and the residual displacement cannot be better eliminated when the wall vibrates subsequently.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-resetting viscous damper, comprising a stainless steel housing, a viscous damper body disposed at one end inside the stainless steel housing, a central plate disposed inside the stainless steel housing, two symmetrically arranged reset springs disposed on both sides of the central plate, a preload adjustment mechanism disposed inside the stainless steel housing, a first limiting mechanism disposed on both sides of the central plate, an operating mechanism disposed inside the stainless steel housing, and a second limiting mechanism disposed at both ends inside the stainless steel housing.

[0006] Preferably, the viscous damper body includes a hydraulic cylinder and a piston rod slidably disposed inside the hydraulic cylinder. The end of the hydraulic cylinder near the stainless steel housing is fixedly sleeved inside the stainless steel housing. The piston rod is fixedly connected to a centering plate. A piston is fixedly sleeved on the outside of the piston rod. Bushing 1 and bushing 2 are fixedly installed at both ends inside the hydraulic cylinder, respectively. The end of the piston rod near the stainless steel housing passes through bushing 1 and extends into the interior of the stainless steel housing. The end of the piston rod away from the stainless steel housing passes through bushing 2 and extends into the outside of the hydraulic cylinder. An extension rod is fixedly installed at the end of the piston rod near bushing 2. Damping holes are provided at both ends of the piston.

[0007] Preferably, the cylinder is provided with a viscous medium, which is methyl silicone oil or modified silicone oil, and pins are fixedly installed on the stainless steel shell and the side of the extension rod that are far apart from each other.

[0008] Preferably, the preload adjustment mechanism includes a bidirectional lead screw and a limiting rod. The two ends of the bidirectional lead screw are rotatably connected to the stainless steel housing and the hydraulic cylinder, respectively. The end of the bidirectional lead screw away from the hydraulic cylinder passes through the stainless steel housing and extends to the outside of the stainless steel housing. Adjusting plates are threaded to both ends of the outer side of the bidirectional lead screw. The bottom ends of the two adjusting plates are slidably sleeved on the outside of the limiting rod. The four return springs are respectively sleeved on the two ends of their respective bidirectional lead screws and limiting rods.

[0009] Preferably, spring seats one are fixedly installed on the top and bottom of the two adjusting plates on opposite sides, and spring seats two are fixedly installed on the top and bottom of both sides of the center plate. The four spring seats one and spring seats two are coaxially arranged with their respective bidirectional lead screw one and limiting rod. The two ends of the four reset springs are respectively located inside their respective spring seats one and spring seats two.

[0010] Preferably, the first limiting mechanism includes a mounting frame, a fixed bracket is fixedly mounted on the side of the mounting frame away from the center plate, the fixed bracket is fixedly connected to the inner wall of the stainless steel shell on the side away from the mounting frame, limiting plates are slidably mounted on both ends inside the mounting frame, extension plates are fixedly mounted on the side of the two limiting plates near the fixed bracket, compression springs are fixedly mounted between the side of the two extension plates away from the limiting plates and the inner wall of the mounting frame, and protrusions are fixedly mounted on the opposite sides of the two limiting plates.

[0011] Preferably, the operating mechanism includes a second bidirectional lead screw, which is rotatably mounted on the top of a stainless steel housing. Both ends of the second bidirectional lead screw are threaded with push plates. The two push plates are respectively disposed inside two mounting frames and cooperate with their respective extension plates. Limiting rods are sleeved on both ends of the top and bottom of the two push plates. Multiple limiting rods are respectively fixedly installed inside their respective mounting frames.

[0012] Preferably, the second limiting mechanism includes a second limiting plate, a third limiting plate, and two connecting brackets. The two connecting brackets are respectively fixedly connected to their respective push plates. Sliding rods are slidably sleeved at both ends of the second and third limiting plates. Multiple sliding rods are fixedly connected to a stainless steel housing. A drive shaft is fixedly installed on the side of the second limiting plate near the connecting bracket. A drive groove is opened at the end of the two connecting brackets near the second limiting plate. The two drive shafts are respectively disposed inside their respective drive grooves. Two symmetrically arranged transmission components are disposed between the second and third limiting plates.

[0013] Preferably, the transmission assembly includes a transmission rod, a rotating shaft is fixedly installed in the middle of the transmission rod, the rotating shaft is rotatably connected to the stainless steel housing, and T-shaped sliders are rotatably installed at both ends of the transmission rod. T-shaped grooves are opened on the opposite sides of the limiting plate two and the limiting plate three, and the two T-shaped sliders are respectively slidably disposed inside the two T-shaped grooves.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The present invention, through the first limiting mechanism, can center and limit the position of the centering plate before fixing the viscous damper, thereby centering the position of the piston rod. After the viscous damper is fixed, the limiting of the centering plate and the piston rod is released, and the initial position of the piston rod is centered. When the wall vibrates subsequently, the return springs on both sides can be subjected to symmetrical force, and the piston rod after vibration can be returned to the initial center position to the maximum extent, thereby better eliminating residual displacement.

[0015] This invention uses a preload adjustment mechanism to simultaneously adjust the preload of the reset springs on both sides of the centering plate, ensuring that the preload height of the reset springs on both sides is consistent, avoiding force deviation of the piston rod, and making the adjustment operation convenient and adaptable to the reset requirements of different engineering scenarios.

[0016] When the first limiting mechanism is operated, the second limiting mechanism operates synchronously to release the limiting of the preload adjustment mechanism. This avoids accidental activation of the preload adjustment mechanism before fixing the viscous damper, which could lead to deviations in the preload parameters. This simplifies the operation steps and reduces installation errors caused by chaotic operation sequences. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an overall sectional view of the present invention; Figure 3 This is a cross-sectional view of the viscous damper body of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is a schematic diagram of the preload adjustment mechanism of the present invention; Figure 6 This is a schematic diagram of the combined structure of the first limiting mechanism, the operating mechanism, and the second limiting mechanism of the present invention; Figure 7 This is a schematic diagram of the mounting frame structure of the present invention; Figure 8 This is a schematic diagram of the limiting plate structure of the present invention; Figure 9 This is a schematic diagram of the operating mechanism structure of the present invention; Figure 10 This is a schematic diagram of the second limiting mechanism of the present invention.

[0018] In the attached diagram, the components represented by each number are as follows: 1. Stainless steel housing; 2. Hydraulic cylinder; 3. Piston rod; 4. Piston; 5. Bushing 1; 6. Bushing 2; 7. Extension rod; 8. Damping hole; 9. Pin head; 10. Centering plate; 11. Return spring; 12. Double-acting lead screw 1; 13. Limiting rod 1; 14. Adjusting plate; 15. Spring seat 1; 16. Spring seat 2; 17. Mounting frame; 18. Fixed bracket; 19. Limiting plate 1; 20. Extension plate; 21. Compression spring; 22. Protruding strip; 23. Double-acting lead screw 2; 24. Push plate; 25. Limiting rod 2; 26. Limiting plate 2; 27. Connecting bracket; 28. Slide rod; 29. ​​Drive shaft; 30. Drive groove; 31. Limiting plate 3; 32. Drive rod; 33. Rotating shaft; 34. T-shaped slider; 35. T-shaped slide groove. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a technical solution: such as Figure 1 - Figure 10The self-resetting viscous damper shown includes a stainless steel housing 1, a viscous damper body disposed at one end inside the stainless steel housing 1, a centering plate 10 disposed inside the stainless steel housing 1, two symmetrically arranged reset springs 11 disposed on both sides of the centering plate 10, a preload adjustment mechanism disposed inside the stainless steel housing 1, a first limiting mechanism disposed on both sides of the centering plate 10, an operating mechanism disposed inside the stainless steel housing 1, and a second limiting mechanism disposed at both ends inside the stainless steel housing 1.

[0021] The viscous damper body includes a hydraulic cylinder 2 and a piston rod 3 slidably disposed inside the hydraulic cylinder 2. The end of the hydraulic cylinder 2 near the stainless steel housing 1 is fixedly sleeved inside the stainless steel housing 1. The piston rod 3 is fixedly connected to the center plate 10. A piston 4 is fixedly sleeved on the outside of the piston rod 3. Bushing 1 5 and bushing 2 6 are fixedly installed at both ends inside the hydraulic cylinder 2, respectively. The end of the piston rod 3 near the stainless steel housing 1 passes through bushing 1 5 and extends into the inside of the stainless steel housing 1. The end of the piston rod 3 away from the stainless steel housing 1 passes through bushing 2 6 and extends to the outside of the hydraulic cylinder 2. An extension rod 7 is fixedly installed at the end of the piston rod 3 near bushing 2 6. Damping holes 8 are opened at both ends of the piston 4.

[0022] The cylinder 2 is equipped with a viscous medium, which is methyl silicone oil or modified silicone oil. Pins 9 are fixedly installed on the stainless steel shell 1 and the side of the extension rod 7 that are far apart from each other.

[0023] The preload adjustment mechanism includes a bidirectional lead screw 12 and a limiting rod 13. The two ends of the bidirectional lead screw 12 are rotatably connected to the stainless steel housing 1 and the oil cylinder 2, respectively. The end of the bidirectional lead screw 12 away from the oil cylinder 2 passes through the stainless steel housing 1 and extends to the outside of the stainless steel housing 1. The two ends of the outside of the bidirectional lead screw 12 are threadedly connected to adjusting plates 14. The bottom ends of the two adjusting plates 14 are slidably sleeved on the outside of the limiting rod 13. Four return springs 11 are respectively sleeved on the two ends of their respective bidirectional lead screw 12 and limiting rod 13.

[0024] Spring seats 15 are fixedly installed on the top and bottom of the two adjusting plates 14 on opposite sides. Spring seats 2 16 are fixedly installed on the top and bottom of both sides of the center plate 10. The four spring seats 15 and spring seats 2 16 are coaxially arranged with their respective bidirectional lead screws 12 and limit rods 13. The two ends of the four reset springs 11 are respectively located inside their respective spring seats 15 and spring seats 2 16.

[0025] The first limiting mechanism includes a mounting frame 17. A fixed bracket 18 is fixedly mounted on the side of the mounting frame 17 away from the center plate 10. The side of the fixed bracket 18 away from the mounting frame 17 is fixedly connected to the inner wall of the stainless steel shell 1. Limiting plates 19 are slidably mounted on both ends inside the mounting frame 17. Extension plates 20 are fixedly mounted on the side of the two limiting plates 19 near the fixed bracket 18. Compression springs 21 are fixedly mounted between the side of the two extension plates 20 away from the limiting plates 19 and the inner wall of the mounting frame 17. Protrusions 22 are fixedly mounted on the opposite sides of the two limiting plates 19.

[0026] The operating mechanism includes a two-way lead screw 23, which is rotatably mounted on the top of the stainless steel housing 1. Both ends of the two-way lead screw 23 are threaded with push plates 24. The two push plates 24 are respectively set inside the two mounting frames 17 and cooperate with their respective extension plates 20. Limiting rods 25 are sleeved on both the top and bottom ends of the two push plates 24. Multiple limiting rods 25 are respectively fixedly installed inside their respective mounting frames 17.

[0027] The second limiting mechanism includes a second limiting plate 26, a third limiting plate 31, and two connecting brackets 27. The two connecting brackets 27 are fixedly connected to their respective push plates 24. Both ends of the second limiting plate 26 and the third limiting plate 31 are slidably fitted with slide rods 28. Multiple slide rods 28 are fixedly connected to the stainless steel housing 1. A drive shaft 29 is fixedly installed on the side of the second limiting plate 26 near the connecting bracket 27. The ends of the two connecting brackets 27 near the second limiting plate 26 are each provided with a drive groove 30. The two drive shafts 29 are respectively set inside their respective drive grooves 30. Two symmetrically arranged transmission components are provided between the second limiting plate 26 and the third limiting plate 31.

[0028] The transmission assembly includes a transmission rod 32, a rotating shaft 33 is fixedly installed in the middle of the transmission rod 32, the rotating shaft 33 is rotatably connected to the stainless steel housing 1, and T-shaped sliders 34 are rotatably installed at both ends of the transmission rod 32. T-shaped grooves 35 are opened on the opposite sides of the limiting plate 26 and the limiting plate 31, and the two T-shaped sliders 34 are respectively slidably arranged inside the two T-shaped grooves 35.

[0029] Working principle: Before installing the structure on the wall, first push the extension rod 7, which will drive the piston rod 3 and the centering plate 10 connected to it to move. During the movement, if one side of the centering plate 10 touches the corresponding two limiting plates 19, the two limiting plates 19 will retract into the corresponding mounting frame 17. At the same time, the two retracted limiting plates 19 will also push the corresponding compression springs 21 to compress until the other side of the centering plate 10 contacts the other two unretracted limiting plates 19. The two retracted limiting plates 19 will then reset under the action of their respective compression springs 21. At this time, both ends of the centering plate 10 are limited between the two limiting plates 19, and the piston rod 3 is centered. Subsequently, the device is installed in the designated position using two pins 9. During the installation process, the piston rod 3 remains in the center position. After the device is fixedly installed, the double-acting screw 23 is rotated. At this time, the two push plates 24 move away from each other along their respective corresponding limit rods 25. The two ends of the two push plates 24 act on their respective extension plates 20. The multiple extension plates 20 then drive their respective corresponding limit plates 19 to move. When the two push plates 24 move to their limit positions, the multiple limit plates 19 no longer limit the two sides of the centering plate 10. Under the action of the first limiting mechanism, before fixing the viscous damper, the position of the centering plate 10 can be centered and limited, thereby centering the position of the piston rod 3. After the viscous damper is fixed, the limiting of the centering plate 10 and the piston rod 3 is released, and the initial position of the piston rod 3 is centered. When the wall vibrates subsequently, the return springs 11 on both sides can be symmetrically stressed, and the piston rod 3 after vibration can be returned to the initial center position to the maximum extent, thereby better eliminating residual displacement. During the movement of the two push plates 24, two second limiting mechanisms are driven to operate synchronously. The operation of one of the second limiting mechanisms is as follows: the two connecting brackets 27 move synchronously with the push plates 24 connected to them, thereby driving the transmission groove 30 at one end to move. Both transmission rods 32 move upward, thereby driving the second limiting plate 26 to move upward along the two sliding rods 28. At this time, the two transmission rods 32 rotate along their respective corresponding rotation axes 33. The T-shaped sliders 34 at the top and bottom of the two transmission rods 32 slide inside their respective corresponding T-shaped sliding grooves 35. The third limiting plate 31 slides downward along the two sliding rods 28. The second limiting plate 26 and the third limiting plate 31 move away from each other, so they no longer limit one of the adjusting plates 14. The movement process of the other second limiting mechanism is the same as above, and neither of the two adjusting plates 14 is limited. Subsequently, rotating the bidirectional lead screw 12 causes the two adjusting plates 14 to move closer to each other simultaneously under the action of the limiting rod 13. This synchronously adjusts the preload of the return springs 11 on both sides of the centering plate 10, ensuring that the preload of the return springs 11 on both sides is consistent and preventing the piston rod 3 from shifting under force. When operating the first limiting mechanism, the second limiting mechanism operates synchronously, releasing the limit on the preload adjustment mechanism. This prevents the preload adjustment mechanism from being accidentally touched before fixing the viscous damper, thus avoiding deviation of the preload parameters. This simplifies the operation steps and reduces installation errors caused by chaotic operation sequences.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-resetting viscous damper, comprising a stainless steel housing (1), characterized in that: The stainless steel housing (1) has a viscous damper body at one end inside, a center plate (10) inside, two symmetrically arranged return springs (11) on both sides of the center plate (10), a preload adjustment mechanism inside, a first limiting mechanism on both sides of the center plate (10), an operating mechanism inside, and a second limiting mechanism at both ends inside the stainless steel housing (1).

2. The self-resetting viscous damper according to claim 1, characterized in that: The viscous damper body includes a cylinder (2) and a piston rod (3) slidably disposed inside the cylinder (2). The end of the cylinder (2) near the stainless steel housing (1) is fixedly sleeved inside the stainless steel housing (1). The piston rod (3) is fixedly connected to the center plate (10). A piston (4) is fixedly sleeved on the outside of the piston rod (3). Bushing 1 (5) and bushing 2 (6) are fixedly installed at both ends inside the cylinder (2). The end of the piston rod (3) near the stainless steel housing (1) passes through bushing 1 (5) and extends into the inside of the stainless steel housing (1). The end of the piston rod (3) away from the stainless steel housing (1) passes through bushing 2 (6) and extends into the outside of the cylinder (2). An extension rod (7) is fixedly installed at the end of the piston rod (3) near bushing 2 (6). Damping holes (8) are opened at both ends of the piston (4).

3. A self-resetting viscous damper according to claim 2, characterized in that: The cylinder (2) is equipped with a viscous medium, which is methyl silicone oil or modified silicone oil. Pins (9) are fixedly installed on the stainless steel shell (1) and the side of the extension rod (7) that are far apart from each other.

4. A self-resetting viscous damper according to claim 2, characterized in that: The preload adjustment mechanism includes a double-acting screw (12) and a limiting rod (13). The two ends of the double-acting screw (12) are rotatably connected to the stainless steel housing (1) and the oil cylinder (2), respectively. The end of the double-acting screw (12) away from the oil cylinder (2) passes through the stainless steel housing (1) and extends to the outside of the stainless steel housing (1). The two ends of the double-acting screw (12) are threadedly connected to adjusting plates (14). The bottom ends of the two adjusting plates (14) are slidably sleeved on the outside of the limiting rod (13). The four reset springs (11) are respectively sleeved on the two ends of their respective double-acting screw (12) and limiting rod (13).

5. A self-resetting viscous damper according to claim 4, characterized in that: Spring seat 1 (15) is fixedly installed on the top and bottom of the two adjustment plates (14) on opposite sides. Spring seat 2 (16) is fixedly installed on the top and bottom of both sides of the center plate (10). The four spring seats 1 (15) and spring seats 2 (16) are coaxially arranged with their respective bidirectional lead screw 1 (12) and limit rod 1 (13). The two ends of the four reset springs (11) are respectively located inside their respective spring seats 1 (15) and spring seats 2 (16).

6. A self-resetting viscous damper according to claim 1, characterized in that: The first limiting mechanism includes a mounting frame (17), a fixed bracket (18) is fixedly installed on the side of the mounting frame (17) away from the center plate (10), the side of the fixed bracket (18) away from the mounting frame (17) is fixedly connected to the inner wall of the stainless steel shell (1), the two ends of the mounting frame (17) are slidably installed with limiting plates (19), the two limiting plates (19) are fixedly installed with extension plates (20) on the side of the two limiting plates (19) close to the fixed bracket (18), the side of the two extension plates (20) away from the limiting plates (19) is fixedly installed with compression springs (21) between the side of the two extension plates (20) away from the limiting plates (19) and the inner wall of the mounting frame (17), and the opposite sides of the two limiting plates (19) are fixedly installed with protrusions (22).

7. A self-resetting viscous damper according to claim 1, characterized in that: The operating mechanism includes a two-way lead screw (23), which is rotatably mounted on the top of the stainless steel housing (1). Both ends of the two-way lead screw (23) are threaded with push plates (24). The two push plates (24) are respectively set inside the two mounting frames (17) and cooperate with their respective extension plates (20). The two ends of the top and the two ends of the bottom of the two push plates (24) are fitted with limit rods (25). Multiple limit rods (25) are respectively fixedly installed inside their respective mounting frames (17).

8. A self-resetting viscous damper according to claim 1, characterized in that: The second limiting mechanism includes a second limiting plate (26), a third limiting plate (31), and two connecting brackets (27). The two connecting brackets (27) are fixedly connected to their respective push plates (24). Both ends of the second limiting plate (26) and the third limiting plate (31) are slidably fitted with sliding rods (28). Multiple sliding rods (28) are fixedly connected to the stainless steel shell (1). A transmission shaft (29) is fixedly installed on the side of the second limiting plate (26) near the connecting bracket (27). A transmission groove (30) is opened on the end of the two connecting brackets (27) near the second limiting plate (26). The two transmission shafts (29) are respectively set inside their respective corresponding transmission grooves (30). Two symmetrically arranged transmission components are provided between the second limiting plate (26) and the third limiting plate (31).

9. A self-resetting viscous damper according to claim 8, characterized in that: The transmission assembly includes a transmission rod (32), a rotating shaft (33) is fixedly installed in the middle of the transmission rod (32), the rotating shaft (33) is rotatably connected to the stainless steel housing (1), and T-shaped sliders (34) are rotatably installed at both ends of the transmission rod (32). T-shaped grooves (35) are opened on the opposite sides of the limiting plate two (26) and the limiting plate three (31), and the two T-shaped sliders (34) are respectively slidably arranged inside the two T-shaped grooves (35).

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