A viscous dampener

Abstract

The present application belongs to the technical field of damping device, and discloses a viscous inertial damper, which comprises a viscous damper, a base and a damper body, and further comprises a joint, a rack, a matching gear, a gear structure, a fixing seat and a flywheel, the joint is fixedly connected with the top of the rack, the bottom of the rack is fixedly connected with the damper body, the fixing seat is fixedly arranged in the inside of the shell, the matching gear is arranged on the fixing seat and is in meshing engagement with the rack, the matching gear is in transmission connection with the flywheel through the gear structure, and the gear structure comprises an adjustable gear ratio assembly for adjusting the gear ratio between the matching gear and the flywheel. The rack is adopted instead of the ball screw, the service life of the damper is greatly prolonged, the overall cost of the damper is reduced, the excessive friction force caused by the ball screw is avoided, the damper locking phenomenon under small amplitude vibration is avoided, and the control performance of the damper is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of damping devices, and more particularly relates to a viscous inertial damper. BACKGROUND

[0002] Bridge cables are prone to large amplitude vibration under the action of external loads such as wind and rain, thereby causing damage to weak links such as connections and affecting the safety of the entire bridge. For the vibration reduction of bridge cables, people generally use classic viscous dampers as external damping. However, as the span of the bridge continues to increase, the length of the cable also continues to grow, and ordinary viscous dampers have been difficult to meet the needs of actual engineering, so many inertial dampers have been applied to cable vibration reduction.

[0003] An inertial mass system is a structure whose generated reaction force is related to the relative acceleration at both ends. Specifically, the generated force is equal to the product of the inertial mass coefficient and the relative acceleration, and the inertial mass coefficient is a property of the inertial mass itself. For example, the inertial mass coefficient of a flywheel-type inertial mass is related to the moment of inertia of the flywheel. The inertial mass itself has very small mass but can produce a large equivalent mass effect. Since the invention of the inertial mass, its application range has been expanding, such as TID systems, TVMD systems, etc. The biggest advantage of the inertial mass system is that it can simulate a large mass effect, and through research, it has been found that the addition of inertial mass can effectively improve the performance of viscous damping, so many inertial dampers have been applied to cable vibration reduction.

[0004] However, in current engineering, the inertial mass generally adopts a ball screw flywheel system, which has high cost and large friction. When the cable vibrates at high frequency and low amplitude, the "locking" phenomenon is easily formed, that is, the entire system does not work due to large friction. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the present application provides a viscous inertial damper, which solves the problem that the current inertial mass generally adopts a ball screw flywheel system, which has high cost and large friction, and the "locking" phenomenon is easily formed when the cable vibrates at high frequency and low amplitude, reduces the overall cost of the damper and improves the control performance of the damper.

[0006] In order to achieve the above object, according to the present application, a viscous inertial damper is provided, comprising a viscous damper, the viscous damper comprising a shell, a base connected to the bottom of the shell, and a damper body arranged inside the shell, further comprising a joint, a rack, a matching gear, a gear structure, a fixing seat, and a flywheel, the joint being arranged at the top of the shell, the joint being fixedly connected to the top of the rack, the bottom of the rack being fixedly connected to the damper body, the fixing seat being fixedly arranged inside the shell and above the damper body, the matching gear being arranged in the fixing seat and being in meshing engagement with the rack, the matching gear being in transmission connection with the flywheel through the gear structure, and the gear structure comprising an adjustable gear ratio assembly, the adjustable gear ratio assembly being used for adjusting the gear ratio between the matching gear and the flywheel, thereby adjusting the inertial mass coefficient of the inertial mass system.

[0007] According to the viscous inertial damper provided by the present application, the gear structure further comprises a steering gear and a planetary gear, the steering gear being in meshing connection with the matching gear, and being used for converting the rotation of the matching gear into rotation around the axis of the shell, the planetary gear being connected with the steering gear, and being used for converging the rotation of at least one of the steering gears in the circumferential direction, and the adjustable gear ratio assembly being connected between the planetary gear and the flywheel.

[0008] According to the viscous inertial damper provided by the present application, the teeth on the rack, the matching gear, and the steering gear are respectively in helical tooth structure.

[0009] According to the viscous inertial damper provided by the present application, the adjustable gear ratio assembly comprises an output gear, a transmission gear set, two shift gears, and a shift piece, the output gear being in transmission connection with the planetary gear, the flywheel being integrally rotatably arranged on the shell through an installation shaft, the two shift gears being rotatably connected to the installation shaft respectively, the shift piece being integrally rotatable with the installation shaft, movable along the installation shaft, located between the two shift gears, and capable of being in transmission connection with any one of the shift gears, and the two shift gears being different in size.

[0010] The transmission gear set comprises three transmission gears, the three transmission gears being in one-to-one meshing engagement with the output gear and the two shift gears respectively, and the transmission gear set being rotatably arranged on the shell.

[0011] According to the viscous inertial damper provided by the present application, the adjustable gear ratio assembly further comprises a shift sleeve and a shift lever, the shift piece being rotatably connected with the shift sleeve at the periphery, the shift lever being connected to the shift sleeve, and the end of the shift lever extending to the outside of the shell.

[0012] The viscous flywheel damper provided by the present application is characterized in that a sliding groove is formed in the shell in the axial direction, and the end of the gear shifting lever extends from the sliding groove and is detachably connected with the shell.

[0013] The viscous flywheel damper provided by the present application is characterized in that the flywheel and the mounting shaft are mounted on the shell through a support frame, one end of the support frame is connected with the shell, the other end of the support frame is supported below the flywheel, and the mounting shaft passes through the support frame and is rotatably connected with the support frame.

[0014] The viscous flywheel damper provided by the present application is characterized in that a plurality of limiting rods are arranged inside the shell in the axial direction of the shell, the bottom of the limiting rod is connected with the base, and the top of the limiting rod is slidably connected with the joint.

[0015] The viscous flywheel damper provided by the present application is characterized in that the fixed seat is provided with a clearance space corresponding to the limiting rod and the rack.

[0016] The viscous flywheel damper provided by the present application is characterized in that the top of the joint is connected with a clamp structure, and / or the clamp structure is connected with the joint through a ball bearing.

[0017] Overall, compared with the prior art, the viscous flywheel damper provided by the present application has the following advantages:

[0018] 1. Compared with the existing ball screw flywheel inertia damper, the use of a rack instead of a ball screw greatly improves the service life of the damper and reduces the overall cost of the damper. Compared with the existing ball screw flywheel inertia system, the use of a gear and rack engagement system to transmit relative motion avoids excessive friction caused by a ball screw, thereby avoiding the "locking" phenomenon of the damper under small amplitude vibration and effectively improving the control performance of the damper.

[0019] 2. The variable speed system with adjustable gear ratio can adjust the gear ratio between the matching gear and the rotating flywheel, thereby adjusting the inertia coefficient, which can be more suitable for actual engineering.

[0020] 3. The rotation of the matching gear is converted into rotation around the axial direction through the planetary gear and the steering gear, so that the flywheel can be installed horizontally, which can greatly save the internal space of the damper.

[0021] 4. The adjustable gear ratio assembly can be easily adjusted by several gear ratios through the gear shifting lever, thereby changing the inertia coefficient of the inertia system to meet different engineering requirements. The gear shifting lever extends from the shell, and the operator can easily adjust it. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the internal structure of the viscous-inertia damper provided by the present application;

[0023] Figure 2 is a schematic diagram of the cross-sectional structure of the viscous-inertia damper provided by the present application;

[0024] Figure 3 is a schematic diagram of the gear transmission structure in the viscous-inertia damper provided by the present application;

[0025] Figure 4 is a schematic diagram of the setting of the support frame provided by the present application;

[0026] Figure 5 is a schematic diagram of the structure of the support frame provided by the present application;

[0027] In all the drawings, the same reference signs are used to represent the same elements or structures, wherein:

[0028] 1, clamp structure; 2, joint; 3, ball bearing; 4, limiting rod; 5, rack; 6, flywheel; 6.1, mounting shaft; 7, gear shifting lever; 8, adjustable gear ratio assembly; 8.1, output gear; 8.2, gear shifting gear; 8.3, gear shifting piece; 8.4, transmission gear set; 8.5, gear shifting sleeve; 9, matching gear; 10, housing; 11, damper main body; 12, base; 13, steering gear; 14, planetary gear; 15, support frame; 16, fixed seat. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0030] Please refer to Figure 1 and Figure 2The present application provides a kind of viscous inertial damper, which comprises a viscous damper, the viscous damper includes shell 10, base 12 connected at the bottom of the shell 10 and damper body 11 arranged inside the shell 10, it also includes joint 2, rack 5, matching gear 9, gear structure, fixed seat 16 and flywheel 6, the joint 2 is provided at the top of the shell 10, the joint 2 is fixedly connected with the top of the rack 5, the bottom of the rack 5 is fixedly connected with the damper body 11, the fixed seat 16 is fixedly arranged inside the shell 10 and above the damper body 11, the matching gear 9 is arranged in the fixed seat 16 and is engaged with the rack 5, the matching gear 9 is drivingly connected with the flywheel 6 through the gear structure, and the gear structure includes adjustable gear ratio assembly 8, which is used to adjust the gear ratio between the matching gear 9 and the flywheel 6, thereby adjusting the inertial mass coefficient of the inertial mass system.

[0031] The viscous inertial damper is provided with a viscous damper, which is composed of a damper body 11 and a shell 10, the damper body 11 is a component that can provide viscous damping, the viscous damper is a classical damper widely used in engineering, which can greatly reduce the cost and ensure the durability. The shell 10 can be a cylindrical structure with open ends, the base 12 is connected to the bottom of the shell 10, and the damper body 11 can be arranged on the base 12. The joint 2 is at the top of the shell 10 and can move relatively with the shell 10, the rack 5 connects the joint 2 and the damper body 11, and the bottom of the rack 5 can be fixedly connected with the upper movable end of the damper body 11. When the joint 2 and the shell 10 move relatively under external vibration, the damper body 11 deforms and displaces, thereby the joint 2 drives the rack 5 to move relatively to the shell 10, and drives the matching gear 9 engaged with the rack 5 to rotate. The matching gear 9 is installed on the fixed seat 16, and the fixed seat 16 is fixedly connected with the shell 10.

[0032] When external vibration drives the joint 2 to move relatively to the shell 10 below, the rack 5 drives the matching gear 9 to rotate; the flywheel 6 is drivingly connected with the matching gear 9 through the gear structure, and the matching gear 9 can transmit rotation to the flywheel 6 through a series of gears. When the matching gear 9 rotates at a certain speed, the flywheel 6 rotates at a converted speed according to the gear ratio between the matching gear 9 and the flywheel 6 at the moment, thereby generating mass effect and providing equivalent mass for the damper. The matching gear 9, the flywheel 6 and the gear structure together form an inertial mass system, which provides inertial mass effect for the damper.

[0033] And a gear ratio adjusting assembly 8 is arranged between the matching gear 9 and the flywheel 6, the gear ratio adjusting assembly 8 can realize the adjustment and switching of the gear ratio of the transmission between the matching gear 9 and the flywheel 6, and then the gear ratio between the matching gear 9 and the flywheel 6 can be adjusted through the gear ratio adjusting assembly 8, so as to change the mass coefficient of the mass system, and the practical engineering applicability is improved.

[0034] Compared with the existing ball screw flywheel 6 mass damper, the viscous mass damper provided by the application adopts a rack 5 instead of a ball screw, so that the service life of the damper is greatly improved, and the overall cost of the damper is reduced; compared with the existing ball screw flywheel 6 mass system, the gear and the rack 5 meshing system is adopted to transmit relative motion, so that the excessive friction force caused by the ball screw is avoided, and the damper locking phenomenon under small amplitude vibration is avoided, and the control performance of the damper is effectively improved; the variable speed system with adjustable gear ratio is adopted, so that the gear ratio between the matching gear 9 and the rotating flywheel 6 can be adjusted, and the mass coefficient can be adjusted, so that the damper is more suitable for practical engineering.

[0035] Further, compared with the traditional viscous damper, the viscous mass damper provided by the application can improve the additional modal damping ratio by up to 30%-60% due to the introduction of the mass system.

[0036] Further, the gear structure further comprises a steering gear 13 and a planetary gear 14, the steering gear 13 is meshed and connected with the matching gear 9, and is used for converting the rotation of the matching gear 9 into the rotation around the axis of the shell 10, the planetary gear 14 is connected with the steering gear 13, and is used for converging the rotation of at least one steering gear 13 in the circumferential direction, and the gear ratio adjusting assembly 8 is connected between the planetary gear 14 and the flywheel 6.

[0037] The embodiment specifically describes the setting of the gear structure, that is, the rack 5 is arranged along the axis of the shell 10, under external vibration, the joint 2 and the rack 5 move up and down along the axis integrally, the rack 5 moves up and down to drive the matching gear 9 meshed with the rack 5 to rotate, then the steering gear 13 is arranged to be meshed and connected with the matching gear 9, the axis of the steering gear 13 is consistent with the axis of the shell 10, and then the rotation of the matching gear 9 can be converted into the rotation around the axis of the shell 10 through the steering gear 13. Then the planetary gear 14 can converge the rotation of the steering gear 13 to one place to form a rotation around the axis.

[0038] Then the adjustable gear ratio assembly 8 can also be provided as a gear rotating around the axial direction, and further realize the rotation of the flywheel 6 around the axial direction, so as to realize the horizontal arrangement of the flywheel 6 inside the shell 10. The arrangement of the gear structure can realize the horizontal arrangement of the flywheel 6 inside the shell 10, so that the internal structure of the damper is compact and the layout is reasonable, which can greatly save the internal space of the damper and improve the actual applicability. And through the gear and rack 5 engagement system, compared with the commonly used ball screw structure, the internal friction can be greatly reduced, and the "locking" phenomenon during small amplitude vibration can be avoided.

[0039] Further, referring to Figure 2 and Figure 3 , the teeth on the rack 5, the matching gear 9 and the steering gear 13 are respectively helical tooth structures. In this embodiment, the teeth on the surfaces of the rack 5, the matching gear 9 and the steering gear 13 are provided as helical tooth structures, that is, the teeth on the rack 5 are not perpendicular to the length direction, and the teeth on the surfaces of the matching gear 9 and the steering gear 13 are not arranged along the axial direction, but are arranged obliquely. This arrangement can reduce the number of gears required to convert the movement of the rack 5 into rotation around the axial direction, which is conducive to simplifying the structure and saving installation space.

[0040] Further, the rack 5 can be provided with a plurality of symmetrical distribution in the circumferential direction; correspondingly, the matching gear 9 engaged with the rack 5 has a plurality of symmetrical distribution, and the matching gear 9 is fixed on the shell 10 through the fixing seat 16 and is stationary relative to the base 12.

[0041] Further, referring to Figure 1 , Figure 2 and Figure 3 , the adjustable gear ratio assembly 8 includes an output gear 8.1, a transmission gear set 8.4, two shift gears 8.2 and a shift piece 8.3, the output gear 8.1 is in transmission connection with the planetary gear 14, the flywheel 6 is integrally rotatably installed on the shell 10 through an installation shaft 6.1, the two shift gears 8.2 are rotatably connected to the installation shaft 6.1, the shift piece 8.3 is integrally rotatable with the installation shaft 6.1, movable along the installation shaft 6.1, located between the two shift gears 8.2 and capable of being in transmission connection with any one of the shift gears 8.2, and the two shift gears 8.2 are different in size.

[0042] The transmission gear set 8.4 includes three transmission gears, and the three transmission gears are in one-to-one engagement with the output gear 8.1 and the two shift gears 8.2, and the transmission gear set 8.4 is rotatably installed on the shell 10.

[0043] The specific structure of the adjustable gear ratio assembly 8 is described in this embodiment. The adjustable gear ratio assembly 8 is mounted on the housing 10 and includes an output gear 8.1, two shift gears 8.2, a shift piece 8.3, and a transmission gear set 8.4. Specifically, under external vibration, the movement of the joint 2 and the rack 5 along the axial direction can drive the matching gear 9, the steering gear 13, and the planetary gear 14 to rotate, and then the movement is concentrated at the output gear 8.1, forming the rotation of the output gear 8.1 around the axial direction. The transmission gear set 8.4 includes three transmission gears that are integrally connected to rotate. The three transmission gears can be integrally connected to rotate with a rotating shaft, thereby realizing the integrated rotation of the three gears. The output gear 8.1 is meshingly connected with one of the transmission gears, and the rotation of the output gear 8.1 can drive the three transmission gears to rotate.

[0044] The other two transmission gears can drive the two shift gears 8.2 to rotate, respectively. However, since the shift gears 8.2 and the mounting shaft 6.1 of the flywheel 6 are rotatably connected, which can be achieved by bearings, when the shift piece 8.3 is not in transmission connection with the shift gears 8.2, the rotation of the shift gears 8.2 will not drive the mounting shaft 6.1 and the flywheel 6 to rotate. The shift piece 8.3 is axially movable and circumferentially fixedly connected with the mounting shaft 6.1. The shift piece 8.3 can be sleeved outside the mounting shaft 6.1 to achieve axial movement, and the shift piece 8.3 and the mounting shaft 6.1 can be integrally connected in rotation in the circumferential direction through a key structure. Moreover, matching key structures can be provided between the end of the shift piece 8.3 and any shift gear 8.2 to achieve the integrated rotation connection between the shift piece 8.3 and any shift gear 8.2, so that the gear ratio can be adjusted by the movement of the shift piece 8.3.

[0045] Specifically, when the shift piece 8.3 moves axially to be in transmission connection with the lower shift gear 8.2, the lower shift gear 8.2 can transmit rotation to the shift piece 8.3, thereby driving the mounting shaft 6.1 and the flywheel 6 to rotate. At this time, the gear ratio is related to the size of the lower shift gear 8.2. When the shift piece 8.3 moves axially to be in transmission connection with the upper shift gear 8.2, the upper shift gear 8.2 can transmit rotation to the shift piece 8.3, thereby driving the mounting shaft 6.1 and the flywheel 6 to rotate. At this time, the gear ratio is related to the size of the upper shift gear 8.2. By adjusting the gear ratio between the matching gear 9 and the flywheel 6, the mass coefficient of the mass system can be adjusted.

[0046] Further, the adjustable gear ratio assembly 8 further comprises a shift sleeve 8.5 and a shift lever 7, the shift sleeve 8.5 is rotatably connected to the periphery of the shift piece 8.3, the shift lever 7 is connected to the shift sleeve 8.5, and the end of the shift lever 7 extends outside the shell 10. The shift piece 8.3 and the shift sleeve 8.5 can be connected by a bearing; the adjustable gear ratio assembly 8 can be conveniently adjusted by several gear ratios through the shift lever 7, so as to change the mass inertia coefficient of the mass inertia system to meet different engineering requirements. The shift lever 7 extends out of the shell 10, and the operator can conveniently adjust it.

[0047] The embodiment introduces the adjustable gear ratio assembly 8, which can conveniently adjust the gear ratio of the matching gear 9 and the flywheel 6, so as to quickly adjust the mass inertia coefficient of the mass inertia system. The gear ratio is adjusted by the shift lever 7 on the shell 10, without the need to disassemble the main structure of the damper to conveniently change the mass inertia coefficient of the mass inertia system, thereby improving the engineering applicability. The mass inertia coefficient of the existing mass inertia damper is fixed after installation, and cannot be changed. If the mass inertia coefficient needs to be changed, the damper needs to be disassembled and replaced, which is time-consuming and laborious.

[0048] Further, the shell 10 is provided with a sliding groove in the axial direction, the end of the shift lever 7 extends out of the sliding groove, and the shift lever 7 is detachably connected to the shell 10. Specifically, referring to Figure 2 and Figure 3 , a connecting plate can be arranged at the contact position of the shift lever 7 and the shell 10. The end of the shift lever 7 extends out of the shell 10 through the sliding groove. The shift lever 7 can be detachably connected to the shell 10 through the connecting plate, and the detachable connection can be achieved by bolts.

[0049] Therefore, when gear shifting adjustment is needed, the connection between the connecting plate and the shell 10 can be first released, for example, by loosening the bolts, and then the shift lever 7 is moved along the sliding groove to the desired position outside the shell 10, and then the connecting plate is connected and fixed to the shell 10, for example, by tightening the bolts.

[0050] Further, referring to Figure 4 and Figure 5 , the flywheel 6 and the mounting shaft 6.1 are mounted to the shell 10 through a support frame 15. One end of the support frame 15 is connected to the shell 10, and the other end of the support frame 15 is supported below the flywheel 6. The mounting shaft 6.1 passes through the support frame 15 and is rotatably connected to the support frame 15. The support frame 15 supports and fixes the flywheel 6. The support frame 15 can be provided with an opening for the mounting shaft 6.1 to pass through, and the mounting shaft 6.1 and the hole wall of the opening can be rotatably connected through a bearing.

[0051] Further, the place where the support frame 15 contacts the flywheel 6 can be provided with a layer of material with a small friction coefficient to facilitate relative movement, so as to reduce the friction between the support frame 15 and the flywheel 6 and smoothly realize the rotation of the flywheel 6. Further, the transmission gear set 8.4 is also installed on the shell 10, and the installation manner can be similar to that of the flywheel 6, and details are not repeated here.

[0052] Further, referring to Figure 2 and Figure 3 , the top of the flywheel 6 can be provided with a limiting shaft which is in sliding and rotatable connection with the joint 2. The joint 2 can be provided with a hollow guide column corresponding to the limiting shaft, and the limiting shaft can be inserted into the guide column to achieve a certain limiting effect between the flywheel 6 and the joint 2 and improve the structural stability.

[0053] Further, the viscous inertial damper further comprises a plurality of limiting rods 4 which are arranged inside the shell 10 along the axial direction of the shell 10, the bottom of the limiting rod 4 is connected with the base 12, and the top of the limiting rod 4 is in sliding connection with the joint 2.

[0054] Referring to Figure 1 and Figure 2 , one end of the limiting rod 4 is fixed on the base 12, and the joint 2 moves axially relative to the viscous damper through the limiting rod 4, and the plurality of limiting rods 4 can effectively prevent the joint 2 from being deviated or twisted relative to the viscous damper. By using the limiting rod 4, only axial movement exists between the joint 2 and the viscous damper, and unnecessary movements such as lateral deviation and twisting do not occur. Specifically, the joint 2 and the limiting rod 4 can also be provided with a hollow guide column corresponding thereto, and the limiting rod 4 can be inserted into the guide column to achieve the sliding connection with the joint 2. Further, the plurality of limiting rods 4 can be symmetrically arranged to better limit the twisting movement of the joint.

[0055] Further, the fixing seat 16 is provided with a avoiding space corresponding to the limiting rod 4 and the rack 5 respectively. In order to smoothly set the limiting rod 4 and smoothly realize the up-down movement of the rack 5. The fixing seat 16 can be fixedly connected with the shell 10 by bolts or the like. Further, the bottom of the joint 2 can be provided with a bottom plate to facilitate the connection with the rack 5.

[0056] Further, the top of the joint 2 is connected with a clamp structure 1; and / or, the clamp structure 1 is connected with the joint 2 through a ball bearing 3.

[0057] Specifically, when the viscous inertia damper is used for bridge cable damping, the joint 2 is used to connect with the cable, and the joint 2 is annular at the connection with the cable, which can adjust the tightness according to the diameter of the cable, so that the damper and the cable are connected more firmly, and the adjustable tightness of the annular hoop can be applied to cables of different diameters, thereby improving the engineering practicability. And the connection between the clamp structure 1 and the joint 2 adopts a rotatable spherical bearing connection, and through the rotatable spherical support, the output of the damper is always perpendicular to the direction of the cable.

[0058] Specifically, the end of the clamp structure 1 connected with the joint 2 is connected with a spherical end, the joint 2 is provided with a spherical groove matched with the spherical end, the spherical end is arranged in the spherical groove, and the two are connected and fixed through a fixing flange. That is, the fixing flange can be sleeved outside the spherical end, and is connected and fixed with the joint 2 through the flange, so as to realize the connection and fixation of the spherical end and the joint 2.

[0059] Further, referring to Figure 1 and Figure 2 , the embodiment provides a viscous inertia damper with adjustable inertia coefficient for bridge cable damping, which solves the cost and technical problems of the existing inertia damping system. It comprises: an adjustable tightness hoop, i.e. a clamp structure 1, which can better adapt to the fixation of the cable; a joint 2; a spherical support for fixing the joint 2, i.e. a ball bearing 3; a limiting rod 4; a rack 5; a flywheel 6; a gear shifting lever 7; an adjustable gear ratio assembly 8; a matching gear 9; an outer shell 10; a damper body 11; a base 12, etc. The joint 2 is used to connect the cable and the damper; the flywheel 6 is connected with the matching gear 9 through the adjustable gear ratio system, and can rotate together when the matching gear 9 rotates under the drive of the rack 5, thereby providing equivalent mass effect to the system; the adjustable gear ratio assembly 8 has two main functions: one is to change the rotation direction, so that the flywheel 6 can be placed horizontally to save damper space, and the other is to adjust the gear ratio through the gear shifting lever 7, so that the relative rotation speed between the gear and the flywheel 6 changes, thereby changing the inertia coefficient of the system.

[0060] The limiting rod 4 is fixed at one end on the base 12 and symmetrically distributed, and the other end is immersed in the joint 2 for a certain length, and the upper and lower surfaces of the joint 2 are provided with limiting devices, so that the limiting rod 4 does not protrude from the upper and lower surfaces, and therefore the maximum stroke of the entire damper can be determined by the length of the limiting rod 4 protruding out of the outer shell 10 and the length of the joint 2.

[0061] Specifically, the outer diameter of the connector 2 and the outer diameter of the outer shell 10 can be the same, so that when the connector 2 moves downward, the limiting rod 4 will not protrude from the top due to the obstruction of the outer shell 10. A top plate can also be provided on the top of the connector 2 to prevent the limiting rod 4 from protruding, which is not limited. Since the connector 2 is connected to the rack 5, the limiting rod 4 will not come out from the bottom of the connector 2. Furthermore, a bottom plate can be provided at the bottom of the connector 2, and a blocking part can be provided on the top outer wall of the limiting rod 4. The blocking part can be slidably connected to the guide post, so that when the connector 2 moves upward, the limiting rod 4 will not come out from the bottom of the connector 2 due to the obstruction of the blocking part and the bottom plate, forming a limiting structure. The limiting structure can also be in other forms, which is not limited.

[0062] Furthermore, the adjustable gear ratio assembly 8 is fixed on the housing 10, and multiple gear ratios are adjusted by the shift lever 7, so that the inertia coefficient of the system can be easily adjusted without disassembling the damper body 11.

[0063] like Figure 3 The internal structure of the adjustable gear ratio assembly 8, as shown in the figure, consists of an output gear 8.1, a shift gear 8.2, a shifting element 8.3, and a transmission gear set 8.4. The shift gear 8.2 and shifting element 8.3 together form the key shifting structure, allowing for convenient adjustment of multiple gear ratios via the shift lever 7 on the housing 10, thereby changing the structure's inertia coefficient. The rotation of the matching gear 9 is converted into axial rotation via the planetary gear 14 and the steering gear 13, thus enabling the flywheel 6 to rotate as... Figure 1 As shown, horizontal installation can greatly save internal space of the damper.

[0064] When the connector 2 moves relative to the housing 10 along the limiting rod 4, the rack 5 connecting the fixed connector 2 and the viscous damper drives the gear fixed on the fixed seat 16 to rotate, thereby causing the flywheel 6 with a large moment of inertia to rotate, providing an equivalent mass effect to the system. At the same time, the gear ratio between the gear and the flywheel 6 can be adjusted through the adjustable gear ratio system, thereby changing the inertial mass coefficient of the inertial mass system.

[0065] The application has the advantages that compared with other ball screw flywheel 6 inertial mass dampers, the application adopts a rack 5 instead of a ball screw, greatly improves the service life of the damper, and reduces the overall cost of the damper; compared with the existing ball screw flywheel 6 inertial mass system, the application adopts a gear and rack 5 meshing system to transmit relative motion, thereby avoiding excessive friction caused by the ball screw, and avoiding the damper "locking" phenomenon under small amplitude vibration of the cable, effectively improving the control performance of the damper; the application adopts a variable speed system with adjustable gear ratio, the gear ratio between the gear and the rotating flywheel 6 can be adjusted through the shift lever 7 on the outer wall of the damper, thereby realizing adjustment of the inertial mass coefficient without disassembling the damper, which is more suitable for actual engineering; compared with the traditional viscous damper, the application introduces an inertial mass system, and can improve the additional modal damping ratio by up to 30%-60%.

[0066] Those skilled in the art will easily understand that the above description is only the preferred embodiment of the application, and is not intended to limit the application, and any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A viscous dampener characterized by, The viscous damper comprises a shell, a base connected to the bottom of the shell, and a damper body arranged inside the shell, and further comprises a joint, a rack, a matching gear, a gear structure, a fixing seat, and a flywheel, the joint is arranged at the top of the shell, the joint is fixedly connected with the top of the rack, the bottom of the rack is fixedly connected with the damper body, the fixing seat is fixedly arranged inside the shell and above the damper body, the matching gear is arranged in the fixing seat and is in meshing engagement with the rack, the matching gear is in transmission connection with the flywheel through the gear structure, and the gear structure comprises an adjustable gear ratio assembly for adjusting the gear ratio between the matching gear and the flywheel, thereby adjusting the mass coefficient of the mass system.

2. The viscous inerter damper of claim 1, wherein, The gear structure further comprises a steering gear and a planetary gear, the steering gear is in meshing connection with the matching gear, for converting the rotation of the matching gear into rotation around the shell in the axial direction, the planetary gear is connected with the steering gear, for converging the rotation of at least one of the steering gears in the circumferential direction, and the adjustable gear ratio assembly is connected between the planetary gear and the flywheel.

3. The viscous inerter damper of claim 2, wherein, The teeth on the rack, the matching gear, and the steering gear are respectively in helical tooth structure.

4. The viscous inerter damper of claim 2, wherein, The adjustable gear ratio assembly comprises an output gear, a transmission gear set, two shift gears, and a shift piece, the output gear is in transmission connection with the planetary gear, the flywheel is integrally rotatably arranged on the shell through a mounting shaft, the two shift gears are rotatably connected to the mounting shaft, the shift piece is integrally rotatable along the mounting shaft, is located between the two shift gears, and can be in transmission connection with any one of the shift gears, and the two shift gears are different in size. The transmission gear set comprises three transmission gears, the three transmission gears are in one-to-one correspondence with the output gear and the two shift gears, and the transmission gear set is rotatably arranged on the shell.

5. The viscous inerter damper of claim 4, wherein, The adjustable gear ratio assembly further comprises a shift sleeve and a shift lever, the shift piece is rotatably connected with the shift sleeve, the shift lever is connected to the shift sleeve, and the end of the shift lever extends to the outside of the shell.

6. The viscous inerter damper of claim 5, wherein, A sliding groove is arranged on the shell in the axial direction, the end of the shift lever extends out of the sliding groove, and the shift lever is detachably connected with the shell.

7. The viscous inerter damper of claim 4, wherein, The flywheel and the mounting shaft are arranged on the shell through a support frame, one end of the support frame is connected with the shell, the other end of the support frame supports the flywheel, the mounting shaft passes through the support frame and is rotatably connected with the support frame.

8. The viscous inerter damper of any one of claims 1-7, wherein, A plurality of limiting rods are arranged inside the shell in the axial direction of the shell, the bottom of the limiting rod is connected with the base, and the top of the limiting rod is in sliding connection with the joint.

9. The viscous inerter damper of claim 8, wherein, The fixing seat and the limiting rod correspondingly arranged at the avoiding space.

10. The viscous inerter damper of any one of claims 1-7, wherein, The top of the joint is connected with a clamp structure, and / or the clamp structure is connected with the joint through a ball bearing.

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