A multi-stage intelligent displacement control viscous damper

Abstract

The application discloses a multistage intelligent displacement control viscous damper, which comprises a fixing frame, a piston device rotationally connected with the fixing frame, an oil cylinder rotationally connected with the fixing frame, an end cover fixedly connected with the oil cylinder and a telescopic piece, and is characterized in that the multistage intelligent displacement control viscous damper further comprises an auxiliary device for cooperating with normal thermal expansion and cold contraction of an object during use; when internal pressure appears sharp fluctuation, the pressure sensor arranged in the oil cylinder can timely remind the staff through the cloud, state monitoring and predictive maintenance are realized, sudden failure is avoided, and the safety and maintenance efficiency of long-term operation of the bridge are improved; the pushing rod is limited by the blocking groove, the elastic piece is completely locked when deformation of the elastic piece reaches the limit, so that the elastic piece cannot continue to deform, which effectively protects the elastic piece in the telescopic piece and avoids fatigue fracture or failure of the elastic piece due to overstroke.

Description

Technical Field

[0001] This invention relates to the field of liquid-cooled air conditioning technology, specifically to a viscous damper with multi-stage intelligent displacement control. Background Technology

[0002] Traditional viscous dampers lack intelligent sensing and condition monitoring capabilities. They lack internal sensing elements such as pressure sensors, making it impossible to monitor real-time changes in the working pressure within the cylinder. Furthermore, traditional viscous dampers do not possess multi-stage adaptive functionality. When a bridge experiences slight swaying due to temperature changes or a light breeze, the piston mechanism immediately engages. The ever-present hydraulic fluid within it resists any movement. This continuous constraint not only limits the normal thermal expansion and contraction deformation of the bridge beams but also generates undesigned additional thermal stresses at the connection joints.

[0003] While existing viscous dampers can dissipate vibration energy through the reciprocating motion of a piston within a cylinder during severe weather or earthquakes, ensuring the structural safety of the bridge, they lack multi-level adaptive and condition monitoring capabilities. When the bridge sways slightly due to temperature changes or light winds, the piston mechanism of a traditional viscous damper immediately engages. The ever-present hydraulic fluid within the damper resists any movement of the piston rod, restricting normal thermal expansion and contraction of the bridge beam and potentially generating undesigned additional temperature stresses at connection points. Over time, this reduces the fatigue life of the damper and its connecting components. During moderate to strong earthquakes, when the bridge sway amplitude significantly increases, and the actual earthquake intensity far exceeds the design intensity, the piston may strike the cylinder bottom or end cap at extremely high speeds due to the lack of automatic damping enhancement as displacement increases. This can generate hydraulic shocks several times the normal operating pressure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a viscous damper with multi-level intelligent displacement control, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage intelligent displacement control viscous damper, comprising a fixed frame, a piston device rotatably connected to the fixed frame, a hydraulic cylinder rotatably connected to the fixed frame, an end cap fixedly connected to the hydraulic cylinder, and a telescopic component. The piston device is slidably connected to the inner wall of the hydraulic cylinder. The piston device includes a first rod and a second rod. The first rod is rotatably connected to the fixed frame. One end of the telescopic component is sleeved on the outer wall of the first rod, and the other end of the telescopic component is sleeved on the outer wall of the second rod. A pressure sensor is provided inside the hydraulic cylinder. The multi-stage intelligent displacement control viscous damper further comprises: an auxiliary device for coordinating with the normal thermal expansion and contraction of the object during use; a control device for controlling the internal pressure of the hydraulic cylinder; and a sealing device for enhancing the sealing effect between the hydraulic cylinder and the end cap. The auxiliary device includes a push rod that slides on the inner wall of the telescopic member, a push rod fixedly connected to the push rod, a rotating rod that rotates on the inner wall of the piston device, and a fixed block fixedly connected to the push rod. The rotating rod has a sliding groove on the side near the fixed block, and the fixed block contacts the inner wall of the sliding groove.

[0006] The auxiliary device includes a fixed rod fixedly connected to the rotating rod, a rotating plate sliding on the inner wall of the end cap, a sliding member rotating on the inner wall of the rotating plate, a first blocking member sliding on the inner wall of the first push rod, a first sliding ring sliding on the inner wall of the push rod, a first push member fixedly connected to the first sliding ring, a second sliding ring sliding on the outer wall of the push rod, and a second push member fixedly connected to the second sliding ring. The rotating plate is fixedly connected to the fixed rod, and a blocking groove is provided on the side of the piston device near the first blocking member.

[0007] The inner wall of the telescopic component is provided with an elastic element to buffer the first and second rods. A torsion spring is provided between the rotating plate and the end cap to drive the rotating plate to reset. An elastic element is provided between the sliding component and the rotating plate to drive the sliding component to extend towards the end cap. The side of the first pusher near the first stop is set with an inclined surface to push the first stop to move. The side of the second pusher near the first stop is set with an inclined surface to push the first stop to move. An elastic element is provided between the first stop and the first push rod to drive the first stop to move.

[0008] The control device includes a sliding inner rod that slides on the inner wall of the piston device, a stop rod that slides on the inner wall of the telescopic member, and a second blocking member that slides on the inner wall of the sliding inner rod. The piston device includes a piston rod and a piston disc. The piston disc is fixedly connected to the piston rod. The stop rod slides on the piston rod and the inner wall of the piston disc. A groove is formed on the surface of the piston disc. A sliding groove is formed on the side of the piston device near the second blocking member. A push groove is formed on the side of the sliding inner rod near the stop rod.

[0009] The control device further includes a partition plate fixed to the inner wall of the cylinder, a push block slidably connected to the sliding inner rod, a sealing plate sliding on the inner wall of the partition plate, a push rod 2 sliding on the inner wall of the sealing plate, and a friction block sliding on the inner wall of the partition plate. The surface of the partition plate has a circular opening, and the side of the sealing plate near the friction block has a sliding groove. The friction block is in contact with the inner wall of the sliding groove.

[0010] The stop bar has an inclined surface on the side near the sliding inner rod. The inclined surface of the stop bar is designed to push the stop bar towards the groove when the sliding inner rod moves. The push block has an inclined surface on the side near the partition plate. The inclined surface of the push block is designed to push the second push rod to move. The friction block has an inclined surface on the side that contacts the sliding groove. The inclined surface of the friction block is designed to slow down the movement speed of the sealing plate. An elastic element is provided between the friction block and the partition plate. The elastic element is designed to drive the friction block to move towards the sealing plate. An elastic element is provided between the second push rod and the sealing plate. The elastic element is designed to pull the sealing plate to move when the second push rod moves.

[0011] The sealing device includes a compression piece 1 fixedly connected to the sliding inner rod, a compression piece 2 sliding on the inner wall of the piston device, a rubber ring fixed to the surface of the end cap, and a hose connecting the piston device and the inner wall of the rubber ring. The piston device is filled with oil.

[0012] The sealing device further includes a limiting key that is slidably connected to the inner wall of the end cap, a sliding rod that is fixedly connected to the extrusion plate, and a protective sleeve that is fixedly connected to the sliding rod. The inner wall of the piston device is provided with a sliding groove, the sliding rod slides on the inner wall of the sliding groove, one end of the protective sleeve is fixedly connected to the inner wall of the sliding groove, and the other end of the protective sleeve is fixedly connected to the sliding rod.

[0013] An elastic element is provided between the limit key and the end cap, and a slot is provided on the side of the oil cylinder near the limit key.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, when the internal pressure fluctuates drastically, the pressure sensor installed inside the cylinder will promptly alert the staff via the cloud, realizing condition monitoring and predictive maintenance, avoiding sudden failures, and improving the safety and maintenance efficiency of the bridge's long-term operation. When the swaying amplitude increases, the push rod pushes the rotating rod to rotate, automatically releasing the sliding member's restriction on the piston device, allowing the piston device to enter the cylinder and start working, activating the viscous damper. The switching process is purely mechanical and requires no external energy. At the same time, whether in tension or compression operation, the blocking groove can limit the push rod through the cooperation of the blocking member and the push member or the push member, completely locking the elastic member when its deformation reaches its limit, preventing it from continuing to deform. This effectively protects the elastic member inside the expansion joint, preventing it from fatigue fracture or failure due to overtravel.

[0015] 2. In this invention, when the sway amplitude is too large, the sliding inner rod pushes the stop rod to reduce the piston disc groove area, providing higher damping force at the end of the stroke, effectively limiting the peak displacement, preventing the piston device from hitting the end cover or cylinder bottom, and protecting the structural safety. When the sway amplitude is rapidly reduced by the second stop, the sliding inner rod will not immediately reset, but will slowly recover, preventing the groove area from fluctuating and causing violent fluctuations in damping force. Under earthquakes or extreme impacts, when the pressure exceeds the design value, the auxiliary oil tank will automatically open to absorb high-pressure oil, protecting the cylinder, end cover and seals from damage. Through the linkage between the second push rod and the sealing plate, the opening of the pressure relief channel is gradual and will not cause the damping force to disappear instantly and cause structural impact.

[0016] 3. In this invention, when the internal pressure of the oil cylinder increases due to large displacement or high-speed impact, the degree of sealing expansion also increases, effectively preventing high-pressure oil from leaking from the fit gap between the oil cylinder and the end cover. Under high-pressure conditions, the rubber ring not only plays a sealing role, but also actively pushes the limit key to increase the mechanical connection strength between the oil cylinder and the end cover, preventing the end cover from loosening due to excessive internal pressure, and transmitting part of the axial force to the fixing frame through the limit key, reducing the fatigue risk of the end cover connection thread and improving long-term reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the position and structure of the hydraulic cylinder and end cap of the present invention; Figure 3 This is a schematic diagram of the position structure of the fixing rod and the rotating plate of the present invention; Figure 4 This is a schematic diagram of the position structure of the rotating rod and the fixing block of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram of section A; Figure 6This is a schematic diagram of the position structure of the partition and push block of the present invention; Figure 7 This is a schematic diagram showing the position and structure of the rubber ring and the limiting key of the present invention; Figure 8 This is a schematic diagram of the position structure of the sliding inner rod and the stop rod of the present invention; Figure 9 This is a schematic diagram showing the position and structure of the sealing plate and friction block of the present invention.

[0018] The meanings of the labels in the diagram are as follows: 1. Fixed frame; 2. Piston assembly; 3. Hydraulic cylinder; 4. End cap; 5. Telescopic component; 6. Push rod; 7. Push rod one; 8. Rotating rod; 9. Fixed block; 10. Fixed rod; 11. Rotating plate; 12. Sliding component; 13. Block one; 14. Sliding ring one; 15. Push component one; 16. Sliding ring two; 17. Push component two; 21. Sliding inner rod; 22. Stop rod; 23. Block two; 24. Partition plate; 25. Push block; 26. Sealing plate; 27. Push rod two; 28. Friction block; 31. Extrusion plate one; 32. Extrusion plate two; 33. Rubber ring; 34. Hoses; 35. Limit key; 36. Sliding rod; 37. Protective sleeve. 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] Please see Figures 1-9 One embodiment of the present invention is: a multi-stage intelligent displacement control viscous damper, comprising a fixed frame 1, a piston device 2 rotatably connected to the fixed frame 1, a hydraulic cylinder 3 rotatably connected to the fixed frame 1, an end cap 4 fixedly connected to the hydraulic cylinder 3, and a telescopic member 5. The piston device 2 is slidably connected to the inner wall of the hydraulic cylinder 3. The piston device 2 includes a first rod and a second rod. The first rod is rotatably connected to the fixed frame 1. One end of the telescopic member 5 is sleeved on the outer wall of the first rod, and the other end of the telescopic member 5 is sleeved on the outer wall of the second rod. A pressure sensor is provided inside the hydraulic cylinder 3. The multi-stage intelligent displacement control viscous damper further comprises: an auxiliary device for coordinating with the normal thermal expansion and contraction of the object during use, a control device for controlling the internal pressure of the hydraulic cylinder 3, and a sealing device for enhancing the sealing effect between the hydraulic cylinder 3 and the end cap 4. The auxiliary device includes a push rod 6 that slides on the inner wall of the telescopic member 5, a push rod 7 that is fixedly connected to the push rod 6, a rotating rod 8 that rotates on the inner wall of the piston device 2, and a fixed block 9 that is fixedly connected to the push rod 7. A sliding groove is provided on the side of the rotating rod 8 near the fixed block 9, and the fixed block 9 contacts the inner wall of the sliding groove.

[0021] The auxiliary device includes a fixed rod 10 fixedly connected to the rotating rod 8, a rotating plate 11 sliding on the inner wall of the end cover 4, a sliding member 12 rotating on the inner wall of the rotating plate 11, a blocking member 13 sliding on the inner wall of the push rod 7, a sliding ring 14 sliding on the inner wall of the push rod 6, a push member 15 fixedly connected to the sliding ring 14, a sliding ring 16 sliding on the outer wall of the push rod 6, and a push member 17 fixedly connected to the sliding ring 16. The rotating plate 11 is fixedly connected to the fixed rod 10, and a blocking groove is provided on the side of the piston device 2 near the blocking member 13.

[0022] The inner wall of the telescopic component 5 is provided with an elastic element to buffer the first and second rods. A torsion spring is provided between the rotating plate 11 and the end cover 4 to drive the rotating plate 11 to reset. An elastic element is provided between the sliding component 12 and the rotating plate 11 to drive the sliding component 12 to extend towards the end cover 4. The side of the push component 15 near the first stop component 13 is set with an inclined surface to push the first stop component 13 to move. The side of the push component 17 near the first stop component 13 is set with an inclined surface to push the first stop component to move. An elastic element is provided between the first stop component 13 and the push rod 7 to drive the first stop component 13 to move.

[0023] In operation, this embodiment requires the viscous damper to be installed on the bridge to maintain its stability during severe weather or earthquakes. When the bridge sways or expands and contracts due to weather conditions, rods one and two will first compress or pull the elastic element inside the telescopic member 5 to provide a certain degree of resistance. When the amplitude of the sway increases, rods one and two will stop compressing or pulling the telescopic member 5. At this time, the piston device 2 will move into the cylinder 3, activating the viscous damper. During operation, the pressure sensor inside the cylinder 3 will monitor the pressure inside the cylinder 3 in real time. When the pressure inside the cylinder 3 changes drastically, the pressure sensor will alert the operator via the cloud. When external sway increases, rods one and two will compress or pull... The elastic element inside the telescopic component 5 acts as a buffer. Rod 1 moves the push rod 6, which in turn moves the push rod 7. The push rod 7 then moves the fixed block 9, which moves along the sliding groove on the surface of the rotating rod 8. This movement causes the fixed block 9 to push the rotating rod 8 to rotate. The rotation of the rotating rod 8 then moves the fixed rod 10, which in turn moves the rotating plate 11. The rotation of the rotating plate 11 causes the sliding component 12 to disengage from the end cap 4, releasing the limiting effect of the sliding component 12 on the piston device 2. This allows the piston device 2 to move. When the resulting shaking causes rods 1 and 2 to pull the elastic element of the telescopic component 5, the pull rod 1 pulls the push rod 6, which in turn moves the push rod 7. The movement of the rod will cause the first stopper 13 to move. As the first stopper 13 moves, it will come into contact with the blocking groove. During this movement, the blocking groove will push the first stopper 13 towards the inside of the push rod 7 due to contact with the arc surface of the first stopper 13. This will also create a damping effect on the push rod 7 during its movement. When the push rod 7 moves the first stopper 13, the second rod will pull the second sliding ring 16, causing the second sliding ring 16 to push the second pusher 17 into contact with the first stopper 13. The first stopper 13 will then come into contact with the inclined surface of the second pusher 17, causing the second pusher 17 to push the first stopper 13 completely into the blocking groove. This prevents the first and second rods from pulling the elastic element inside the telescopic member 5. When the first and second rods compress the elastic element inside the telescopic member 5, the first rod will push the pusher 17... When rod 6 moves, push rod 6 will drive rod 7 to move stop 13. When push rod 7 moves, it will cause sliding ring 14 to contact rod 2. Sliding ring 14 will be blocked by rod 2, and through sliding ring 14, push push 15 to contact stop 13. Stop 13 will then contact the inclined surface of push 15, and push 15 will push stop 13 to fully insert into rod 2. This prevents rods 1 and 2 from pushing the elastic element inside telescopic member 5 to move, thus preventing the elastic element from failing. During small-amplitude swaying due to thermal expansion and contraction or a slight breeze, only the elastic element inside telescopic member 5 works, providing slight cushioning, while piston device 2 remains stationary. This avoids the damper restricting the normal thermal displacement of the bridge. When the internal pressure fluctuates drastically...The pressure sensor inside cylinder 3 promptly alerts staff via the cloud, enabling condition monitoring and predictive maintenance. This prevents sudden failures and improves the safety and maintenance efficiency of the bridge's long-term operation. When the sway increases, push rod 7 drives rotating rod 8, automatically releasing the sliding member 12's restriction on piston device 2. This allows piston device 2 to enter cylinder 3 and activate the viscous damper. The switching process is purely mechanical and requires no external power. Furthermore, regardless of whether it's a tension or compression operation, the blocking member 13, in conjunction with push member 15 or push member 2 17, limits push rod 7 with the blocking groove. When the elastic element reaches its deformation limit, it is completely locked, preventing further deformation. This effectively protects the elastic element inside the expansion joint 5, preventing fatigue fracture or failure due to overtravel.

[0024] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, the control device includes a sliding inner rod 21 that slides on the inner wall of the piston device 2, a stop rod 22 that slides on the inner wall of the telescopic member 5, and a second blocking member 23 that slides on the inner wall of the sliding inner rod 21. The piston device 2 includes a piston rod and a piston disc. The piston disc is fixedly connected to the piston rod. The stop rod 22 slides on the piston rod and the inner wall of the piston disc. A groove is provided on the surface of the piston disc. A sliding groove is provided on the side of the piston device 2 near the second blocking member 23. A push groove is provided on the side of the sliding inner rod 21 near the stop rod 22.

[0025] The control device also includes a partition 24 fixed to the inner wall of the cylinder 3, a push block 25 slidably connected to the sliding inner rod 21, a sealing plate 26 sliding on the inner wall of the partition 24, a push rod 27 sliding on the inner wall of the sealing plate 26, and a friction block 28 sliding on the inner wall of the partition 24. The surface of the partition 24 is provided with a round opening, and the side of the sealing plate 26 near the friction block 28 is provided with a sliding groove, and the friction block 28 contacts the inner wall of the sliding groove.

[0026] The side of the stop rod 22 closest to the sliding inner rod 21 is set with an inclined surface. The inclined surface of the stop rod 22 is designed to push the stop rod 22 towards the groove when the sliding inner rod 21 moves. The side of the push block 25 closest to the partition plate 24 is set with an inclined surface. The inclined surface of the push block 25 is designed to push the push rod 27 to move. The side of the friction block 28 in contact with the sliding groove is set with an inclined surface. The inclined surface of the friction block 28 is designed to slow down the moving speed of the sealing plate 26. An elastic element is provided between the friction block 28 and the partition plate 24. The elastic element is designed to drive the friction block 28 to move towards the sealing plate 26. An elastic element is provided between the push rod 27 and the sealing plate 26. The elastic element is designed to pull the sealing plate 26 to move when the push rod 27 moves.

[0027] The sealing device includes a compression plate 31 fixedly connected to the sliding inner rod 21, a compression plate 32 sliding on the inner wall of the piston device 2, a rubber ring 33 fixed on the surface of the end cap 4, and a hose 34 connecting the piston device 2 and the inner wall of the rubber ring 33. The piston device 2 is filled with oil.

[0028] The sealing device also includes a limiting key 35 that is slidably connected to the inner wall of the end cap 4, a sliding rod 36 that is fixedly connected to the extrusion plate 32, and a protective sleeve 37 that is fixedly connected to the sliding rod 36. The inner wall of the piston device 2 is provided with a sliding groove, the sliding rod 36 slides on the inner wall of the sliding groove, one end of the protective sleeve 37 is fixedly connected to the inner wall of the sliding groove, and the other end of the protective sleeve 37 is fixedly connected to the sliding rod 36.

[0029] An elastic element is provided between the limit key 35 and the end cover 4, and a slot is provided on the side of the oil cylinder 3 near the limit key 35.

[0030] In this embodiment, when the piston device 2 moves towards the inside of the cylinder 3, it drives the sliding inner rod 21 to move. When the amplitude of the swaying is too large, the sliding inner rod 21 will contact the inner wall of the cylinder 3. Then, the cylinder 3 will push the sliding inner rod 21 towards the inside of the piston device 2 through the reaction force. The movement of the sliding inner rod 21 will push the stop rod 22 towards the groove provided on the surface of the piston disc, reducing the number of grooves on the surface of the piston disc and enhancing the damping effect between the piston device 2 and the cylinder 3. When the sliding inner rod 21 moves, it will drive the second stop 23 to move. The second stop 23 will contact the slide groove. When the second stop 23 contacts the slide groove, the slide groove will push the second stop 23 towards the inner wall of the sliding inner rod 21, thus allowing the piston to move. The cooperation between the resistance element 23 and the slide groove reduces the reset speed of the sliding inner rod 21. The partition 24 divides the interior of the cylinder 3 into a main oil chamber and an auxiliary oil chamber. As the piston device 2 continues to move into the cylinder 3, the pressure inside the cylinder 3 increases. At this time, the sliding inner rod 21 drives the push block 25 to contact the push rod 27. The push block 25 pushes the push rod 27 away from the circular opening. When the push rod 27 moves, it pulls the sealing plate 26 away from the circular opening via the elastic element. When the sealing plate 26 moves, it contacts the inclined surface of the friction block 28. The inclined surface of the friction block 28 extends the opening and closing time of the push rod 27. When the push rod 27 moves away from the circular opening... When the main oil tank and auxiliary oil tank are connected by a round opening, the higher pressure in the main oil tank will push the oil into the auxiliary oil tank for pressure relief. When the pressure in the main oil tank recovers, the oil in the auxiliary oil tank will flow back into the main oil tank. When the piston device 2 moves away from the oil cylinder 3, it will drive the sliding inner rod 21 to move. The movement of the sliding inner rod 21 will drive the push block 25 to move. The push block 25 will contact the sealing plate 26, opening the round opening on the surface of the partition plate 24. When the push block 25 contacts the sealing plate 26, the sealing plate 26 will simultaneously move the sliding inner rod 21 away from the piston device 2 via the push block 25. Then the stop rod 22 can move towards the leakage groove. If the shaking amplitude is too large, the sliding inner rod 21 will move away from the piston device 2. 1. Pushing the stop lever 22 reduces the piston disc groove area, providing higher damping force at the end of the stroke, effectively limiting peak displacement, preventing the piston device 2 from hitting the end cover 4 or the cylinder bottom, and protecting structural safety. When the amplitude of the swaying is rapidly reduced by the second stop 23, the sliding inner rod 21 will not immediately reset, but will slowly recover, preventing the groove area from fluctuating and causing violent fluctuations in damping force. Under earthquake or extreme impact, when the pressure exceeds the design value, the auxiliary oil tank will automatically open to absorb high-pressure oil, protecting the cylinder 3, end cover 4 and seals from damage. Through the linkage between the push lever 27 and the sealing plate 26, the opening of the pressure relief channel is gradual and will not cause the damping force to disappear instantly and cause structural impact.

[0031] When the sliding inner rod 21 moves towards the inside of the piston device 2, it pushes the compression plate 31 to move. The movement of the compression plate 31 squeezes the liquid inside the piston device 2 into the rubber ring 33 through the hose 34. The liquid entering the rubber ring 33 causes the rubber ring 33 to expand. The expansion of the rubber ring 33 blocks the gap between the cylinder 3 and the end cover 4, preventing the oil from flowing out through the gap when the pressure inside the cylinder 3 increases. When the piston device 2 moves towards the outside of the cylinder 3, the end cover 4 will contact the sliding rod 36. The sliding rod 36 will then push the compression plate 32 to squeeze the liquid inside the piston device 2 into the rubber ring 33 when the piston device 2 moves towards the outside of the cylinder 3. The movement of the sliding rod 36 will also cause the protective sleeve 37 to extend and retract, allowing the outside to... Liquid cannot enter the piston device 2. When the rubber ring 33 expands, it will contact the limit key 35. The rubber ring 33 will push the limit key 35 into the inner wall of the fixing frame 1, strengthening the fixation between the cylinder 3 and the end cover 4. When the internal pressure of the cylinder 3 increases due to large displacement or high-speed impact, the degree of sealing expansion also increases, effectively preventing high-pressure oil from leaking from the mating gap between the cylinder 3 and the end cover 4. Under high pressure conditions, the rubber ring 33 not only plays a sealing role, but also actively pushes the limit key 35 to increase the mechanical connection strength between the cylinder 3 and the end cover 4, preventing the end cover 4 from loosening due to excessive internal pressure. It transmits part of the axial force to the fixing frame 1 through the limit key 35, reducing the fatigue risk of the end cover 4 connection thread and improving long-term reliability.

[0032] 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 process, method, article, or apparatus.

[0033] 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 multi-stage intelligent displacement control viscous damper, comprising a fixed frame (1), a piston device (2) rotatably connected to the fixed frame (1), a hydraulic cylinder (3) rotatably connected to the fixed frame (1), an end cap (4) fixedly connected to the hydraulic cylinder (3), and a telescopic member (5), wherein the piston device (2) is slidably connected to the inner wall of the hydraulic cylinder (3), the piston device (2) includes a first rod and a second rod, the first rod is rotatably connected to the fixed frame (1), one end of the telescopic member (5) is sleeved on the outer wall of the first rod, and the other end of the telescopic member (5) is sleeved on the outer wall of the second rod, and a pressure sensor is provided inside the hydraulic cylinder (3), characterized in that, The viscous damper for multi-level intelligent displacement control also includes: an auxiliary device for cooperating with the normal thermal expansion and contraction of the object during use, a control device for controlling the internal pressure of the oil cylinder (3), and a sealing device for enhancing the sealing effect between the oil cylinder (3) and the end cap (4). The auxiliary device includes a push rod (6) that slides on the inner wall of the telescopic member (5), a push rod (7) that is fixedly connected to the push rod (6), a rotating rod (8) that rotates on the inner wall of the piston device (2), and a fixed block (9) that is fixedly connected to the push rod (7). The rotating rod (8) has a sliding groove on the side near the fixed block (9), and the fixed block (9) is in contact with the inner wall of the sliding groove.

2. The viscous damper for multi-stage intelligent displacement control according to claim 1, characterized in that: The auxiliary device includes a fixed rod (10) fixedly connected to the rotating rod (8), a rotating plate (11) sliding on the inner wall of the end cover (4), a sliding member (12) rotating on the inner wall of the rotating plate (11), a first blocking member (13) sliding on the inner wall of the first push rod (7), a first sliding ring (14) sliding on the inner wall of the push rod (6), a first push member (15) fixedly connected to the first sliding ring (14), a second sliding ring (16) sliding on the outer wall of the push rod (6), and a second push member (17) fixedly connected to the second sliding ring (16). The rotating plate (11) is fixedly connected to the fixed rod (10), and the piston device (2) has a blocking groove on the side near the first blocking member (13).

3. The viscous damper for multi-stage intelligent displacement control according to claim 2, characterized in that: The inner wall of the telescopic member (5) is provided with an elastic element, a torsion spring is provided between the rotating plate (11) and the end cover (4), an elastic element is provided between the sliding member (12) and the rotating plate (11), the side of the push member one (15) near the stop member one (13) is set as an inclined surface, the side of the push member two (17) near the stop member one (13) is set as an inclined surface, and an elastic element is provided between the stop member one (13) and the push rod one (7).

4. The viscous damper for multi-stage intelligent displacement control according to claim 1, characterized in that: The control device includes a sliding inner rod (21) that slides on the inner wall of the piston device (2), a stop rod (22) that slides on the inner wall of the telescopic member (5), and a second blocking member (23) that slides on the inner wall of the sliding inner rod (21). The piston device (2) includes a piston rod and a piston disc. The piston disc is fixedly connected to the piston rod. The stop rod (22) slides on the inner wall of the piston rod and the piston disc. A groove is provided on the surface of the piston disc. A sliding groove is provided on the side of the piston device (2) near the second blocking member (23). A push groove is provided on the side of the sliding inner rod (21) near the stop rod (22).

5. The viscous damper for multi-stage intelligent displacement control according to claim 4, characterized in that: The control device also includes a partition (24) fixed to the inner wall of the oil cylinder (3), a push block (25) slidably connected to the sliding inner rod (21), a sealing plate (26) sliding on the inner wall of the partition (24), a push rod (27) sliding on the inner wall of the sealing plate (26), and a friction block (28) sliding on the inner wall of the partition (24). The surface of the partition (24) is provided with a round opening, and the side of the sealing plate (26) near the friction block (28) is provided with a sliding groove. The friction block (28) is in contact with the inner wall of the sliding groove.

6. The viscous damper for multi-stage intelligent displacement control according to claim 5, characterized in that: The side of the stop bar (22) near the sliding inner rod (21) is set as an inclined surface, the side of the push block (25) near the partition (24) is set as an inclined surface, the side of the friction block (28) in contact with the sliding groove is set as an inclined surface, an elastic element is provided between the friction block (28) and the partition (24), and an elastic element is provided between the push rod (27) and the sealing plate (26).

7. The viscous damper for multi-stage intelligent displacement control according to claim 6, characterized in that: The sealing device includes a compression plate one (31) fixedly connected to the sliding inner rod (21), a compression plate two (32) sliding on the inner wall of the piston device (2), a rubber ring (33) fixed on the surface of the end cap (4), and a hose (34) connecting the piston device (2) and the inner wall of the rubber ring (33). The piston device (2) is filled with oil.

8. The viscous damper for multi-stage intelligent displacement control according to claim 7, characterized in that: The sealing device also includes a limiting key (35) that is slidably connected to the inner wall of the end cap (4), a sliding rod (36) that is fixedly connected to the extrusion plate (32), and a protective sleeve (37) that is fixedly connected to the sliding rod (36). The inner wall of the piston device (2) is provided with a sliding groove, the sliding rod (36) slides on the inner wall of the sliding groove, one end of the protective sleeve (37) is fixedly connected to the inner wall of the sliding groove, and the other end of the protective sleeve (37) is fixedly connected to the sliding rod (36).

9. The viscous damper for multi-stage intelligent displacement control according to claim 8, characterized in that: An elastic element is provided between the limit key (35) and the end cap (4), and a slot is provided on the side of the oil cylinder (3) near the limit key (35).

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