A viscous damper

Abstract

The present invention relates to a viscous damper, comprising: a first sleeve, the interior of which is a cavity; a secondary piston rod, one end of which is connected to the first sleeve and the other end of which has an opening; an active piston rod, the active piston rod extending into the interior of the secondary piston rod at the opening of the secondary piston rod; two first annular limiters, the two first annular limiters being arranged at the end of the active piston rod extending into the secondary piston rod; an annular damper, the outer annular wall of the annular damper being in contact with the inner side wall of the secondary piston rod; and a second annular limiter, the second annular limiter being arranged between the first annular limiter and the annular damper. In a viscous damper of the present invention, a first sleeve, an active piston rod, and a secondary piston rod are provided, and the sleeves are arranged layer by layer to realize graded energy consumption, reduce the heat generated inside the first sleeve, avoid the risk of cylinder explosion, and ensure safety.

Description

Technical Field

[0001] The present invention relates to the field of energy dissipation and vibration reduction, and in particular to a viscous damper. Background Art

[0002] Traditional earthquake-resistant structures primarily improve their seismic resistance by increasing the stiffness and strength of their components. However, this results in large engineering workloads, high costs, and significant construction difficulties. Furthermore, the increased stiffness of the reinforced structure can lead to an intensified seismic response. Therefore, in recent years, seismic isolation technology has gradually become widely adopted, effectively reducing the seismic response of structures and protecting building safety. Energy dissipation and vibration reduction devices are an important component of seismic isolation technology, with viscous dampers being the most widely used. Their basic principle is to utilize a piston moving through a viscous fluid to directly convert the structural vibration energy into heat energy within the viscous fluid for dissipation, thereby achieving both structural vibration reduction and energy dissipation.

[0003] However, as the structural vibration amplitude increases, the piston of the viscous damper moves too fast, causing the internal temperature of the viscous fluid to rise rapidly, and then causing a sharp increase in the pressure in the cylinder, resulting in the risk of cylinder explosion, posing a major safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a viscous damper to solve the problem that the piston of the existing viscous damper moves too fast, which causes the internal temperature of the viscous fluid to rise rapidly, and then causes the pressure in the cylinder to increase sharply, resulting in the risk of cylinder explosion and a major safety hazard.

[0005] The technical solution for achieving the above-mentioned purpose is: a viscous damper, comprising: a first sleeve (101), wherein a cavity is formed inside the first sleeve (101), and one end of the first sleeve (101) is closed, and a hole is left at the other end; a secondary piston rod (102), wherein one end of the secondary piston rod (102) extends into the hole of the first sleeve (101) and is movable in the cavity of the first sleeve (101), and the other end of the secondary piston rod (102) has an opening; an active piston rod (103), wherein the active piston rod (103) extends into the interior of the secondary piston rod (102) at the opening of the secondary piston rod (102), forming an extending section and a connecting section located outside, and a space is formed between the side wall of the extending section of the active piston rod (103) and the inner wall of the secondary piston rod (102). An annular space is left; two first annular limiters (104), the two first annular limiters (104) are arranged at one end of the active piston rod (103) extending into the annular space, and the two first annular limiters (104) are supported on the inner side wall of the secondary piston rod (102); an annular damping layer (105), the annular damping (105) is arranged in the annular space, and the inner annular wall of the annular damping (105) is in contact with the side wall of the active piston rod (103), and the outer annular wall is in contact with the inner side wall of the secondary piston rod (102); a second annular limiter (106), the second annular limiter (106) is in the annular space, and the second annular limiter (106) is arranged between the first annular limiter (104) and the annular damping (105).

[0006] In a viscous damper of the present invention, a first sleeve (101), an active piston rod (103) and a secondary piston rod (102) are provided. The sleeves are arranged layer by layer to achieve graded energy consumption. When the vibration amplitude is large, most of the energy is consumed on the first annular limiter (104), the annular damper (105) and the second annular limiter (106) between the active piston rod (103) and the secondary piston rod (102), thereby greatly reducing the generation of heat inside the first sleeve (101), avoiding the risk of cylinder explosion and ensuring safety.

[0007] A further improvement of the viscous damper of the present invention is that it further comprises: a cooling device (107), the cooling device (107) being sleeved on the first sleeve (101); the cooling device (107) being externally connected to a water pipe, and cooling the first sleeve (101) by the flow of cooling water. In the present invention, the viscous damper is cooled by the external cooling device, further reducing the risk of cylinder explosion.

[0008] In a viscous damper of the present invention, the cooling device comprises: a water inlet pipe (1071), one end of the water inlet pipe (1071) is connected to the viscous damper, and the other end is connected to a tap water pipe; a water outlet pipe (1072), one end of the water outlet pipe (1072) is connected to the viscous damper, and the other end is connected to a drain pipe; a third sleeve (1073), the third sleeve (1073) is sleeved on the outer periphery of the first sleeve (101), and the third sleeve (1073) is connected to the tap water pipe; 3) has a cavity interlayer in the middle; the outer wall of the third sleeve (1073) has an opening connected to the water inlet pipe (1071) and the water outlet pipe (1072); cooling water enters the cavity interlayer of the third sleeve (1072) through the water inlet pipe (1071) and then flows out from the water outlet pipe (1072); two water valves (1074) are respectively mounted on the water inlet pipe (1071) and the water outlet pipe (1072). In the present invention, the heat generated in the first sleeve is transferred by the flowing cooling water, further reducing the heat in the first sleeve and reducing the risk of cylinder explosion.

[0009] A viscous damper of the present invention further includes: a displacement sensor (108), wherein both ends of the displacement sensor (108) are fixedly connected to the active piston rod (103) and the secondary piston rod (102), respectively; the displacement sensor (108) senses the position change between the active piston rod (103) and the secondary piston rod (102), and sends a signal to start a cooling device (107). In the present invention, the activation of the cooling device is triggered by the displacement sensor, which is more intelligent.

[0010] In a viscous damper of the present invention, the viscous damper further comprises a viscous liquid (109), and the viscous liquid (109) is filled in the cavity of the first sleeve (101). In the present invention, the viscous liquid is used to convert part of the earthquake energy into heat, and the heat is transferred through cooling water, thereby reducing the risk of cylinder explosion and enhancing the shock absorption effect.

[0011] In a viscous damper of the present invention, the secondary piston rod (102) comprises: a rod body (1021), the diameter of the rod body (1021) is consistent with the diameter of the hole of the first sleeve (101), and a portion of the rod body (1021) extends into the hole of the first sleeve (101); a second sleeve (1022), the closed end of the second sleeve (1022) is fixedly connected to one end of the rod body (1021), the other end of the second sleeve (1022) is open, and the interior of the opening of the second sleeve (1022) is a cavity; and a piston with a hole (1023), the piston with a hole (1023) is fixed to the other end of the rod body (1021), the piston with a hole (1023) is built into the cavity of the first sleeve (101), and the diameter of the piston with a hole (1023) matches the inner diameter of the cavity of the first sleeve (101). In the present invention, since a plurality of small circular holes are opened on the perforated piston, when the secondary piston rod drives the perforated piston to move, silicone oil flows through the small circular holes, forming a viscous damping effect to dissipate seismic energy.

[0012] In a viscous damper of the present invention, the viscous damper further comprises a spring (110), wherein both ends of the spring (110) are supported between the bottom of the inner cavity of the secondary piston rod (102) and the top of the extending section of the active piston rod (103). In the present invention, the spring dissipates a portion of the energy of the displacement generated between the secondary piston rod (102) and the active piston rod (103).

[0013] In a viscous damper of the present invention, an extension portion (10311) is provided at one end of the active piston rod (103); the diameter of the extension portion (10311) is the same as the inner diameter of the secondary piston rod (102); and two first annular limiters (104) are provided on both the inner and outer sides of the extension portion (10311). In the present invention, the position of the active piston rod (103) is restricted from the inner and outer sides by the two first annular limiters (104), thereby enhancing the shock absorption effect.

[0014] In a viscous damper of the present invention, the diameters of the first annular stopper (104), the annular damper (105), and the second annular stopper (106) are all the same as the inner diameter of the secondary piston rod (102). In the present invention, the limiting function of the annular stopper is used to prevent the active piston rod from being pulled out of the secondary piston rod.

[0015] The present invention provides a viscous damper, further comprising: an extension section may be provided at the closed end of the first sleeve (101), and a first circular hole (1011) is provided on the extension section for fixedly connecting the first sleeve (101) to an external structure; a second circular hole (10321) is provided on the connecting section of the active piston rod (103), for fixedly connecting the active piston rod (103) to an external structure; the first circular hole (1011) and the second circular hole (10321) are on the same horizontal line. In the present invention, the viscous damper can be applied to a suitable structure or device to perform shock absorption and energy dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of an embodiment of the viscous damper of the present invention.

[0017] Figure 2 FIG. 4 is a cross-sectional view of the viscous damper 10 of the present invention.

[0018] Figure 3 FIG. 1 is a top view of the viscous damper 10 of the present invention.

[0019] Figure 4 1 is a side view of the secondary piston rod 102 of the present invention.

[0020] Figure 5 103 is a side view of the active piston rod 103 of the present invention.

[0021] Figure 6 1 is a cross-sectional view of the cooling device 107 and the displacement sensor 108 in the viscous damper 10 of the present invention.

[0022] Figure 7 104 is a side view of the first annular limiter 104 of the present invention.

[0023] In the figure: 1. Viscous damper and structural layer; 10. Viscous damper; 101. First sleeve; 1011. First circular hole; 102. Secondary piston rod; 1021. Rod body; 1022. Second sleeve; 1023. Piston with hole; 103. Active piston rod; 1031. Insertion section; 10311. Enlarged section; 1032. Connecting section; 10321. Second circular hole; 104. First annular limiter; 105. Annular damper; 106. Second annular limiter; 107. Cooling device; 1071. Water inlet pipe; 1072. Water outlet pipe; 1073. Third sleeve; 1074. Water valve; 108. Displacement sensor; 109. Viscous fluid; 110. Spring; 11. Structural beam; 12. Structural column; 13. Support column; 14. Platform; 15. Base. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] See Figure 1 , showing a schematic structural diagram of an embodiment of a viscous damper according to the present invention. In this embodiment, a viscous damper 10 is installed between structural layers, where two structural beams 11 and two structural columns 12 are fixed to form a rectangular space. Two support columns 13 are connected at an angle on the same side within the rectangular space, with the other ends of the two support columns 13 fixedly connected to the structural columns 12. A platform 14 is horizontally fixed to the junction of the two support columns 13. Two bases 15 are respectively mounted on the platform 14 and a structural beam 11. The ends of the viscous damper 10 are fixed to the two bases 15. Once fixed, the viscous damper 10 is in a horizontal position, capable of dissipating energy and reducing vibration within the structural layer.

[0026] In other embodiments, the viscous damper 10 can be installed in a mechanical structure that vibrates violently, such as a transportation facility, a vehicle, etc., which is not limited here.

[0027] See Figure 2 , showing a cross-sectional view of a viscous damper of the present invention. The present invention provides a viscous damper, comprising: a first sleeve 101, wherein a cavity is formed inside the first sleeve 101, and one end of the first sleeve 101 is closed, and the other end has a hole.

[0028] The closed end of the first sleeve 101 is the bottom of the cavity.

[0029] The secondary piston rod 102 has one end extending from the hole of the first sleeve 101 and is movable in the cavity of the first sleeve 101 , and the other end of the secondary piston rod 102 has an opening.

[0030] The diameter of the inserted portion of the secondary piston rod 102 matches the diameter of the hole of the first sleeve 101 .

[0031] See Figure 2 and Figure 3 , Figure 2 A cross-sectional view showing a viscous damper of the present invention is shown, Figure 3 The figure shows a top view of the viscous damper 10 of the present invention. The active piston rod 103 extends into the interior of the secondary piston rod 102 at the opening of the secondary piston rod 102, forming an extension section 1021 and a connecting section 1022 located outside. An annular space is left between the side wall of the extension section 1021 of the active piston rod 103 and the inner wall of the secondary piston rod 102.

[0032] In this embodiment, an annular space is formed between the outer wall of the extension section 1021 of the active piston rod 103 and the inner wall of the secondary piston rod 102, and other components are subsequently installed in the retained annular space; in other embodiments, multiple annular grooves can be preset on the outer peripheral wall of the active piston rod 103, and the size matches the components of the subsequent installation, which is not limited here.

[0033] Two first annular limiters 104 are provided at one end of the section where the active piston rod 103 extends into the annular space, and the two first annular limiters 104 are supported on the inner side wall of the secondary piston rod 102 .

[0034] The outer peripheral walls of the two first annular limiters 104 are fixedly connected to the inner side wall of the secondary piston rod 102 , and the inner walls are connected to the active piston rod 103 and limit the position of the active piston rod 103 .

[0035] The annular damping layer 105 is provided in the annular space, and the inner annular wall of the annular damping 105 is in contact with the side wall of the active piston rod 103 , and the outer annular wall is in contact with the inner side wall of the secondary piston rod 102 .

[0036] The annular damping layer 105 is made of a viscoelastic material, and the inner and outer sides of the annular damping layer 105 are connected to the active piston rod 103 and the secondary piston rod 102 respectively.

[0037] In this embodiment, when there is relative displacement between the active piston rod 103 and the secondary piston rod 102 , the annular damping layer 105 is deformed, and the damping force provided by the annular damping layer 105 consumes seismic energy.

[0038] The second annular stopper 106 is in the annular space and is disposed between the first annular stopper 104 and the annular damping layer 105 .

[0039] Among them, the second annular limiter 106 is a high-strength limiter with sufficient self-strength and connection strength. The outer wall of the second annular limiter 106 is supported on the inner wall of the secondary piston rod 102 and will not fall off during an earthquake. The inner wall of the second annular limiter 106 limits the active piston rod 103, preventing the active piston rod 103 from being pulled out of the secondary piston rod 102.

[0040] The present invention provides a viscous damper, further comprising: a cooling device 107 , wherein the cooling device 107 is sleeved on the first sleeve 101 .

[0041] The cooling device 107 is described in detail below and will not be described again here.

[0042] The cooling device 107 is externally connected to a water pipe, and cools the first sleeve 101 by the flow of cooling water.

[0043] In this embodiment, the first sleeve is cooled by flowing cooling water. In other embodiments, other liquids may be used for cooling, which is not limited here.

[0044] See Figure 6 , showing a cross-sectional view of the cooling device 107 and displacement sensor 108 in the viscous damper 10 of the present invention. The present invention provides a viscous damper, wherein the cooling device includes: a water inlet pipe 1071, one end of the water inlet pipe 1071 is connected to the viscous damper 10, and the other end is connected to the tap water pipe.

[0045] Among them, the tap water pipe is not shown in the figure, and the diameter of the water inlet pipe 1071 can be adjusted accordingly according to the water inlet demand.

[0046] The water outlet pipe 1072 has one end connected to the viscous damper and the other end fixedly connected to the drain pipe.

[0047] The diameter of the water outlet pipe 1072 is consistent with the diameter of the water inlet pipe 1071 .

[0048] See Figure 6 , shows a side view of the third sleeve 1073 of the present invention. The third sleeve 1073 is sleeved on the outer periphery of the first sleeve 101, and a cavity interlayer is formed in the middle of the third sleeve 1073.

[0049] Among them, the cavity interlayer of the third sleeve 1073 is reserved for cooling water.

[0050] The outer wall of the third sleeve 1073 has an opening connected to the water inlet pipe 1071 and the water outlet pipe 1072 . The cooling water enters the cavity of the third sleeve 1072 through the water inlet pipe 1071 and then flows out from the water outlet pipe 1072 .

[0051] The cooling water can flow in the third sleeve 1072 to take away the heat emitted by the viscous damper.

[0052] Two water valves 1074 are respectively mounted on the water inlet pipe 1071 and the water outlet pipe 1072 .

[0053] Among them, water valve 1074 is an electric water valve and does not require manual switching.

[0054] There is signal transmission between the water valve 1074 and the displacement sensor 108 , and the displacement sensor 108 can transmit a signal to open the water valve 1074 and start the cooling module 107 .

[0055] See Figure 6, showing a cross-sectional view of the cooling device 107 and the displacement sensor 108 in the viscous damper 10 of the present invention. The present invention provides a viscous damper and a displacement sensor 108, wherein both ends of the displacement sensor 108 are fixedly connected to the active piston rod 103 and the secondary piston rod 102, respectively.

[0056] The displacement sensor 108 is used to sense the relative position between the active piston rod 103 and the secondary piston rod 102 .

[0057] The displacement sensor 108 senses the position change between the active piston rod 103 and the secondary piston rod 102 and sends a signal to start the cooling device 107 .

[0058] When relative displacement occurs between the active piston rod 103 and the secondary piston rod 102 , the displacement sensor 108 can detect it and send a signal to open the water valve 1074 in the cooling device 107 .

[0059] See Figure 2 , which shows a cross-sectional view of a viscous damper according to the present invention. The present invention provides a viscous damper, further comprising a viscous fluid 109 , which is filled in the cavity of the first sleeve 101 .

[0060] In this embodiment, silicone oil is selected as the viscous liquid 109 to provide resistance and dissipate seismic energy; in other embodiments, other viscous liquids may be selected as fillers, such as glycerin, etc., which is not limited here.

[0061] See Figure 2 and Figure 4 , Figure 2 A cross-sectional view of a viscous damper 10 of the present invention is shown, Figure 4 The secondary piston rod 102 of the present invention is shown in a side view. The present invention provides a viscous damper, wherein the secondary piston rod 102 comprises a rod body 1021 , the diameter of the rod body 1021 being consistent with the diameter of the hole of the first sleeve 101 , and a portion of the rod body 1021 extending into the hole of the first sleeve 101 .

[0062] The rod body 1021 matches the size of the hole of the first sleeve 101 and can slide in and out of the hole.

[0063] The second sleeve 1022 has a closed end fixedly connected to one end of the rod body 1021 , and the other end of the second sleeve 1022 is open, and the interior of the opening of the second sleeve 1022 is a cavity.

[0064] The opening direction of the second sleeve 1022 is the same as the hole direction of the first sleeve 101 .

[0065] The piston with a hole 1023 is fixed to the other end of the rod body 1021 , and the piston with a hole 1023 is built into the cavity of the first sleeve 101 , and the diameter of the piston with a hole 1023 matches the inner diameter of the cavity of the first sleeve 101 .

[0066] There are multiple small round holes on the perforated piston 1023.

[0067] In this embodiment, the perforated piston 1023 is parallel to the bottom of the inner cavity of the first sleeve 101. When the perforated piston 1023 moves in the cavity, due to the multiple small circular holes, the silicone oil passes through the small circular holes to drive the flow of the viscous liquid 109 in the cavity, forming a viscous damping effect to dissipate seismic energy.

[0068] The present invention provides a viscous damper, further comprising a spring 110 , with both ends of the spring 110 supported between the bottom of the inner cavity of the secondary piston rod 102 and the top of the extending section of the active piston rod 103 .

[0069] In this embodiment, two springs are provided between the bottom of the inner cavity of the secondary piston rod 102 and the top of the extension section of the active piston rod 103; in other embodiments, one or more springs can be provided as required, which is not limited here.

[0070] See Figure 5 , showing a side view of the active piston rod 103 of the present invention. The present invention provides a viscous damper, wherein the active piston rod 103 has an enlarged portion 10311 at one end of the extending section; the diameter of the enlarged portion 10311 is the same as the inner diameter of the secondary piston rod 102.

[0071] The outer wall of the enlarged portion 10311 is in contact with the inner wall of the secondary piston rod 102 .

[0072] See Figure 7 , shows a side view of the first annular stopper 104 of the present invention. The two first annular stoppers 104 are arranged on the inner and outer sides of the enlarged portion 10311.

[0073] In this embodiment, two first annular limiters 104 are provided on the inner and outer sides of the enlarged portion 10311 to limit the position of the active piston rod 103 .

[0074] The present invention provides a viscous damper, wherein the diameters of the first annular stopper 104 , the annular damping layer 105 and the second annular stopper 106 are all the same as the inner diameter of the secondary piston rod 102 .

[0075] In this embodiment, the first annular limiter 104, the annular damping layer 105 and the second annular limiter 106 work together in the annular space left between the side wall of the active piston rod 103 and the inner wall of the secondary piston rod 102, and can consume most of the seismic energy when the vibration speed is fast.

[0076] The present invention provides a viscous damper, further comprising: an extension section may be provided at the closed end of the first sleeve 101, and a first circular hole 1011 is provided on the extension section for fixedly connecting the first sleeve 101 to an external structure.

[0077] In this embodiment, the extension section is provided and the first circular hole 1011 is opened so that screws can be used to fix the viscous damper, thereby reducing the impact on the first sleeve 101 .

[0078] In other embodiments, welding fixation may be selected, which is not limited here.

[0079] See Figure 5 , shows a side view of the active piston rod 103 of the present invention. A second circular hole 10321 is provided on the connecting section of the active piston rod 103 for fixedly connecting the active piston rod 103 to an external structure.

[0080] The second circular hole 10321 is provided so that screws can be used to fix the viscous damper, thereby reducing the impact on the active piston rod 103.

[0081] The first circular hole 1011 and the second circular hole 10321 are on the same horizontal line.

[0082] The viscous damper needs to be in a horizontal state to work. When setting the fixing points between the viscous damper and the external structure, the first circular hole 1011 and the second circular hole 10321 are set on the same horizontal line, which is conducive to the operation of the viscous damper.

[0083] The working process of a viscous damper in a structural layer of the present invention is as follows:

[0084] When the earthquake intensity is relatively low, the active piston rod 103 and the secondary piston rod 102 move as a whole. The rod body 1021 of the secondary piston rod 102 drives the piston with a hole 1023 to perform piston movement inside the secondary piston rod 102 at a relatively low speed, and the damping force is relatively small, which does not exceed the connection strength of the first annular limiter 104. The first annular limiter 104 serves to limit the relative displacement between the active piston rod 103 and the secondary piston rod 102, and the two maintain synchronous movement. At this time, the piston movement speed is equal to the speed between the structural layers.

[0085] When the earthquake intensity increases, the speed of the active piston rod 103 is relatively high and the damping force is relatively large, which exceeds the connection strength of the first annular limiter 104. The first annular limiter 104 is detached from the inner wall of the cavity of the secondary piston rod 102, and a relative displacement is generated between the secondary piston rod 102 and the active piston rod 103. The annular damping layer 105 and the spring 109 between the secondary piston rod 102 and the active piston rod 103 are deformed to consume the earthquake energy, and the displacement and speed transmitted to the secondary piston rod 103 by the active piston rod 103 are reduced; at the same time, when the displacement sensor 108 detects the displacement between the secondary piston rod 102 and the active piston rod 103, it sends a signal to the cooling device 107, opens the water valve 1074, and allows cooling water to flow in the third sleeve 1073 to take away the heat generated by the viscous damper.

[0086] Among them, the critical point of the low speed and high speed stages of the perforated piston 1023 lies in whether the first annular limiter 104 is disengaged. Therefore, a reasonable connection strength of the first annular limiter 104 can be designed according to the expected critical speed to achieve flexible adjustment of the critical state.

[0087] The present invention has been described in detail above with reference to the accompanying drawings. A person skilled in the art may make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A viscous damper, characterized in that: include: A first sleeve (101), wherein a cavity is formed inside the first sleeve (101), one end of the first sleeve (101) is closed, and a hole is left at the other end; a secondary piston rod (102), one end of which extends from the hole of the first sleeve (101) and is movable in the cavity of the first sleeve (101), and the other end of which has an opening; An active piston rod (103), the active piston rod (103) extends into the interior of the secondary piston rod (102) at the opening of the secondary piston rod (102), forming an extending section (1031) and a connecting section (1032) located outside, and an annular space is left between the side wall of the extending section of the active piston rod (103) and the inner wall of the secondary piston rod (102); Two first annular stoppers (104), the two first annular stoppers (104) being arranged at one end of the active piston rod (103) extending into the section (1031) in the annular space, and the two first annular stoppers (104) being supported on the inner side wall of the secondary piston rod (102); An annular damper (105), wherein the annular damper (105) is arranged in the annular space, and the inner annular wall of the annular damper (105) is in contact with the side wall of the active piston rod (103), and the outer annular wall is in contact with the inner side wall of the secondary piston rod (102); a second annular stopper (106), the second annular stopper (106) being in the annular space, and the second annular stopper (106) being arranged between the first annular stopper (104) and the annular damper (105); A cooling device (107), wherein the cooling device (107) is sleeved on the first sleeve (101); The cooling device (107) is externally connected to a water pipe, and cools the first sleeve (101) by the flow of cooling water; a displacement sensor (108), wherein two ends of the displacement sensor (108) are fixedly connected to the active piston rod (103) and the secondary piston rod (102), respectively; The displacement sensor (108) senses the position change between the active piston rod (103) and the secondary piston rod (102), and sends a signal to start the cooling device (107); A spring (110), both ends of which are supported between the hollow bottom of the secondary piston rod (102) and the top of the extending section of the active piston rod (103).

2. A viscous damper according to claim 1, characterized in that: The cooling device comprises: a water inlet pipe (1071), one end of the water inlet pipe (1071) being connected to the viscous damper, and the other end being connected to a tap water pipe; a water outlet pipe (1072), one end of the water outlet pipe (1072) being connected to the viscous damper, and the other end being connected to a drain pipe; A third sleeve (1073), the third sleeve (1073) is sleeved on the outer periphery of the first sleeve (101), and a cavity interlayer is provided in the middle of the third sleeve (1073); The outer wall of the third sleeve (1073) has an opening connected to the water inlet pipe (1071) and the water outlet pipe (1072); cooling water enters the cavity interlayer of the third sleeve (1073) through the water inlet pipe (1071) and then flows out from the water outlet pipe (1072); Two water valves (1074), the two water valves (1074) are respectively sleeved on the water inlet pipe (1071) and the water outlet pipe (1072).

3. The viscous damper according to claim 1, characterized in that: The viscous damper further comprises a viscous liquid (109), and the viscous liquid (109) is filled in the cavity of the first sleeve (101).

4. The viscous damper according to claim 1, characterized in that: The secondary piston rod (102) comprises: a rod body (1021), wherein the diameter of the rod body (1021) is consistent with the diameter of the hole of the first sleeve (101), and a portion of the rod body (1021) extends into the hole of the first sleeve (101); a second sleeve (1022), wherein the closed end of the second sleeve (1022) is fixedly connected to one end of the rod body (1021), the other end of the second sleeve (1022) is open, and the interior of the second sleeve (1022) is hollow; A piston with a hole (1023), the piston with a hole (1023) is fixed to the other end of the rod body (1021), the piston with a hole (1023) is built into the cavity of the first sleeve (101), and the diameter of the piston with a hole (1023) matches the inner diameter of the cavity of the first sleeve (101).

5. The viscous damper according to claim 1, characterized in that: An enlarged portion (10311) is provided at one end of the insertion section (1031) of the active piston rod (103); The diameter of the enlarged portion (10311) is the same as the inner diameter of the secondary piston rod (102); The two first annular limiters (104) are arranged on the inner and outer sides of the expansion portion (10311).

6. The viscous damper according to claim 1, characterized in that: The diameters of the first annular limiter (104), the annular damper (105) and the second annular limiter (106) are all the same as the inner diameter of the secondary piston rod (102).

7. The viscous damper according to claim 1, characterized in that: Also includes: An extension section may be provided at the closed end of the first sleeve (101), and a first circular hole (1011) is provided on the extension section for fixedly connecting the first sleeve (101) to an external structure; A second circular hole (10321) is provided on the connecting section (1032) of the active piston rod (103) for fixedly connecting the active piston rod (103) to an external structure; The first circular hole (1011) and the second circular hole (10321) are on the same horizontal line.

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