CN107339002B - Variable index viscous damper - Google Patents

Variable index viscous damper Download PDF

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Publication number
CN107339002B
CN107339002B CN201710727552.6A CN201710727552A CN107339002B CN 107339002 B CN107339002 B CN 107339002B CN 201710727552 A CN201710727552 A CN 201710727552A CN 107339002 B CN107339002 B CN 107339002B
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hole
flow
damping
cylinder
sealing
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CN107339002A (en
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简万磊
杨建国
房修春
彭风北
徐万里
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Nanjing Danfeng Machinery Technology Co ltd
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Nanjing Danfeng Machinery Technology Co ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/0235—Anti-seismic devices with hydraulic or pneumatic damping

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

The application discloses variable-index viscous damper, which is characterized in that a first damping channel and a second damping channel are arranged in a cylinder body of a cylinder barrel, circulation holes communicated with the first damping channel and the second damping channel are formed, and the output of the damper is adjusted through the positions of different circulation holes. The application also discloses another variable-index viscous damper, wherein a first damping channel, a third damping channel and a fourth damping channel are arranged in the cylinder body of the cylinder barrel, circulation holes communicated with the first damping channel, the third damping channel and the fourth damping channel are formed in the cylinder body of the cylinder barrel, and the output of the damper is adjusted through the positions of different circulation holes. When the piston of the damper moves, the output force with different indexes can be generated to adapt to the irregular change of the external force, so that the protection function of the viscous damper on the building structure is improved.

Description

Variable index viscous damper
Technical Field
The invention relates to a viscous damper used in the field of seismic fortification of buildings and bridges, in particular to a variable index viscous damper.
Background
The viscous damper is used as an effective energy dissipation and vibration reduction device and is widely applied to the field of seismic fortification of buildings, bridges and the like. Viscous dampers are used in many projects, mainly in high-rise buildings, high-rise structures, gymnasiums, bridges, railways and other buildings.
At present, the energy dissipation damping force of a viscous damper used at home and abroad is limited by more technical indexes including damping coefficient, index, speed, displacement and the like, in order to enable the viscous damper to meet the requirement of earthquake fortification, a part of dampers are additionally provided with controllers and sensors for control, and due to unpredictability and outburst of disasters such as earthquake, strong wind and the like, when the disasters come, external power supplies of the controllers and the sensors are usually damaged or are forcibly closed due to safety factors, so that the controllers and the sensors lose effects. And because some controllers and sensors can not be effectively maintained, the controllers and the sensors often lose the function, or the sensitivity of the controllers and the sensors is reduced, and the controllers and the sensors can not timely react to sudden disasters. Therefore, the current viscous damper basically takes mechanical control as a main part and takes external instrument control as an auxiliary part.
At present, the output of the viscous damper is designed according to related technical specifications, and after the assembly is completed, the output index of each viscous damper is a certain value, but the reality is that disasters caused by earthquakes or strong winds and the like often deviate from the design range, and when the disasters exceed the design range, the displacement and the output of the viscous damper exceed the design range, so that the viscous damper is damaged and loses the function.
Moreover, the structure and the shape of the existing building are more and more complex, the stress condition of the building is more and more complex when an earthquake or a hurricane occurs, and the viscous damper with a single damping index cannot meet the use requirement.
Disclosure of Invention
In order to solve at least some of the above problems, the present invention provides a viscous damper, which has damping channels with different lengths, and when a piston of the viscous damper moves, the viscous damper can generate output forces with different indexes to adapt to irregular changes of external force, so as to improve the protection function of the viscous damper on a building structure, and in order to achieve the above object, a first technical solution proposed in the present application is:
an index-variable viscous damper comprises a cylinder barrel provided with a circular sealing cavity, a piston arranged in the sealing cavity, and a guide rod for driving the piston to move in the sealing cavity along the axial direction of the cylinder barrel, wherein the piston keeps sealing contact with the inner surface of the cylinder barrel when moving, two ends of the sealing cavity along the axial direction are respectively called a sealing cavity A end and a sealing cavity B end, and at least two first damping channels and at least two second damping channels are arranged in the cylinder barrel of the cylinder barrel;
corresponding to each first damping channel, a first flow through hole A and a first flow through hole B are formed in the cylinder body of the cylinder barrel, the first flow through holes A and the first flow through holes B are communicated with the corresponding first damping channels and the sealing cavities, and compared with the first flow through holes A, the first flow through holes B are closer to the ends of the sealing cavities B;
a second flow hole A and a second flow hole B are formed in the cylinder body of the cylinder barrel corresponding to each second damping channel, the second flow holes A and the second flow holes B are communicated with the corresponding second damping channels and the corresponding sealing cavities, the opening, located on the inner surface of the cylinder body, of each second flow hole A is arranged at the end of the corresponding damping cavity A, and the opening, located on the inner surface of the cylinder body, of each second flow hole B is arranged at the end of the corresponding damping cavity B;
viewed in the axial direction perpendicular to the cylinder barrel, the first flow through hole A and the first flow through hole B are positioned between the second flow through hole A and the second flow through hole B in the axial direction of the cylinder barrel;
when the piston moves, the second through hole A and the second through hole B are both kept in a communication state with the sealing cavity;
at least one of the first flow through hole A and the first flow through hole B is in communication with the seal chamber when the piston moves.
In the technical scheme, the damping channels including the first damping channel and the second damping channel are arranged in the cylinder body of the cylinder barrel and are communicated with the damping cavity through corresponding through holes. Compared with the prior art that the damping channel is arranged on the piston, or the gap between the piston and the inner wall of the cylinder body is used as the damping channel, after the damping channel is arranged in the cylinder body, the length of the damping channel can not be influenced by the thickness of the piston; under the condition of ensuring the strength of the piston, the thickness of the piston can be made very thin, and under the condition of the same stroke of the damper, the lengths of parts such as a cylinder barrel, a guide rod and the like of the damper can be greatly shortened, so that the processing and manufacturing cost of the damper is reduced. Meanwhile, the whole length of the damper can be shortened, and the damper can be suitable for some special scenes, such as places with strict limitation on the length of the damper.
In the technical scheme, the lengths of the first damping channel and the second damping channel are different, the length of the first damping channel is relatively short, the two circulation holes of the first damping channel are located between the two circulation holes of the second damping channel along the axial direction of the cylinder barrel, and when the piston moves, the second damping channel keeps a damping effect all the time. For the first damping channel, it is only active when the piston moves between the first through-flow hole a and the first through-flow hole B. Therefore, when the piston moves between the first through hole A and the second through hole A or between the first through hole B and the second through hole B, only the second damping channel is in action, at the moment, the damping channel is narrowed, the output force of the viscous damper is increased, and when energy brought by external force is effectively consumed, the swing amplitude of the building structure is also reduced, the swing amplitude of the building structure is prevented from exceeding the design range of the building structure, and the safety of the building structure is ensured.
In the technical scheme, the output force of the viscous damper has at least two working states, wherein in the first working state, the piston moves between the first through hole A and the second through hole A, or moves between the first through hole B and the second through hole B, and only the second damping channel acts; in a second operating state, the piston moves between the first through-opening a and the first through-opening B, the first damping channel and the second damping channel acting simultaneously. Along with the change of the position of the piston in the sealing cavity, the output index of the viscous damper changes stage by stage, so that the output of the viscous damper changes, and the adaptability of the viscous damper to external vibration is improved.
Further, the at least two first damping channels extend along the axial direction of the cylinder barrel and are uniformly arranged around the axis of the cylinder barrel; the at least two second damping channels extend along the axial direction of the cylinder barrel and are uniformly arranged around the axis of the cylinder barrel; a damping member for adjusting a flow cross-section of the damping channel is mounted in at least one damping channel, which includes a first damping channel and a second damping channel.
Set up the damping passageway along the axial of cylinder, can improve the processing convenience of damping passageway, simultaneously because the even arrangement of damping passageway, under the exogenic action, when the piston moved, because damping fluid can be even flow in the damping passageway, make the resultant force of damping fluid to the effort of piston can roughly be the same with the axis direction of cylinder, make the piston can move along the axis direction of cylinder, avoid because the damping fluid is to its effort inhomogeneous, and lead to the piston to have the inclined tendency, increase the frictional force of piston and cylinder, the life of reduction equipment.
After the damping piece is arranged in the damping channel, the parameters of the manufactured viscous damper can be conveniently adjusted, the damping piece can be a slender rod piece or a hollow pipeline, the flow section of the damping channel is changed by the damping piece, the flow of damping liquid passing through the damping channel is changed, and therefore the output of the viscous damper is adjusted. The damping pieces in different forms are arranged, so that various indexes of the viscous damper can be changed correspondingly.
Further, at least one end of the first damping channel extends to the end face of the cylinder body of the cylinder barrel to form a first opening end leading to the outside; at least one end of the second damping channel extends to the end face of the cylinder body of the cylinder barrel to form a second opening end leading to the outside; and the first opening end and the second opening end are both detachably provided with plugging pieces.
After the opening end is arranged, the damping channel can be processed from the opening end, so that the damping channel is convenient to manufacture, meanwhile, the functions of the damping channel can be conveniently adjusted, particularly the output force of the damping channel can be adjusted, when the output force of the damping channel needs to be adjusted, the plugging piece can be opened, then a sealing component for sealing is stretched into the damping channel, and any one of two circulation holes corresponding to the same damping channel is plugged, so that the damping channel loses the effect; or the damping piece is replaced, so that the parameters including the output force of the invention are adjusted.
Furthermore, a first sealing element is arranged at one end of the cylinder body, a second sealing element is arranged at the other end of the cylinder body, and the first sealing element, the second sealing element and the space surrounded by the cylinder body form the sealing cavity; the first sealing element is positioned at the end A of the sealing cavity, and the second sealing element is positioned at the end B of the sealing cavity; a first communicating part for communicating the seal cavity with the second flow through hole A is formed on the first seal; or a second communicating part for communicating the sealing cavity with the second flow through hole B is formed on the second sealing element; or a first communicating portion for communicating the seal chamber with the second flow through hole A is formed in the first seal, and a second communicating portion for communicating the seal chamber with the second flow through hole B is formed in the second seal.
Preferably, the first communicating portion is formed by radially inward recessing of the outer peripheral surface of the first sealing member, or the first communicating portion is a first communicating hole provided in the first sealing member, one end of the first communicating hole is provided on the outer peripheral surface of the first sealing member, and the other end of the first communicating hole is provided on the end surface of the first sealing member facing the sealing cavity; the second communicating portion is formed by the outer peripheral surface of the second sealing member being recessed radially inward, or the second communicating portion is a second communicating hole provided in the second sealing member, one end of the second communicating hole is provided on the outer peripheral surface of the second sealing member, and the other end of the second communicating hole is provided on an end surface of the second sealing member facing the seal chamber.
The communication part is arranged to enable the opening of the circulation hole, which is positioned on the inner surface of the cylinder, to be positioned in the cylinder area corresponding to the first sealing piece or the second sealing piece, so that the effective length of the damping channel can be prolonged to the maximum extent.
Further, an anti-blocking part is formed on the outer peripheral surface of the piston, an anti-blocking cavity communicated with the sealing cavity is formed between the anti-blocking part and the inner peripheral surface of the cylinder, and when the piston moves to one end of the sealing cavity, the second flow through hole A or the second flow through hole B can be communicated with the sealing cavity through the anti-blocking cavity. The anti-blocking portion may be formed by chamfering the outer circumferential surface of the piston, or a recessed portion formed by recessing the outer circumferential surface of the piston toward the radially inner side may be provided on one side or both sides of the outer circumferential surface of the piston.
After the anti-blocking part is arranged on the outer peripheral surface of the piston, the length of the damping channel can be effectively prolonged under the condition of ensuring the overall strength of the piston, so that the volume of the viscous damper is reduced.
The second technical scheme proposed by the application is as follows:
an index-variable viscous damper comprises a cylinder barrel provided with a circular sealing cavity, a piston arranged in the sealing cavity, and a guide rod for driving the piston to move in the sealing cavity along the axial direction of the cylinder barrel, wherein the piston keeps sealing contact with the inner surface of the cylinder barrel during movement, two ends of the sealing cavity along the axial direction are respectively called a sealing cavity A end and a sealing cavity B end, and at least two first damping channels, at least two third damping channels and at least two fourth damping channels are arranged in the cylinder barrel of the cylinder barrel;
corresponding to each first damping channel, a first flow through hole A and a first flow through hole B are formed in the cylinder body of the cylinder barrel, the first flow through holes A and the first flow through holes B are communicated with the corresponding first damping channels and the corresponding sealing cavities, and compared with the first flow through holes A, the first flow through holes B are closer to the ends of the sealing cavities B;
a third flow through hole A and a third flow through hole B are formed in the cylinder body of the cylinder barrel corresponding to each third damping passage, the third flow through holes A and the third flow through holes B are communicated with the corresponding third damping passages and the sealing cavities, openings of the third flow through holes A, which are located on the inner surface of the cylinder body, are formed in the end of the damping cavity A, and the third flow through holes B are located in the middle of the cylinder body of the cylinder barrel corresponding to the sealing cavities;
a fourth circulation hole A and a fourth circulation hole B are formed in the cylinder body of the cylinder barrel corresponding to each fourth damping channel, the fourth circulation holes A and the fourth circulation holes B are communicated with the corresponding fourth damping channels and the sealing cavity, the fourth circulation holes A are located in the middle of the cylinder body of the cylinder barrel corresponding to the sealing cavity, and an opening, located on the inner surface of the cylinder body, of each fourth circulation hole B is formed in the end of the damping cavity B;
observing along the axial direction of the vertical cylinder barrel, and arranging the circulation holes from the end of the sealing cavity A to the end of the sealing cavity B along the axial direction of the cylinder barrel in the following sequence, wherein the third circulation hole A, the first circulation hole A, the third circulation hole B, the fourth circulation hole A, the first circulation hole B and the fourth circulation hole B are arranged in sequence;
when the piston moves, at least one of the first through hole A and the third through hole B is communicated with the sealing cavity, and at least one of the first through hole B and the fourth through hole A is communicated with the sealing cavity;
when the piston moves, the third flow hole a and the fourth flow hole B are both held in a state of communication with the seal chamber.
After the viscous damper in the technical scheme is installed, the piston is usually preset at the middle position of the sealing cavity, and when the piston moves in the range between the first through hole A and the first through hole B, the damping liquid mainly flows through the first damping channel; when the piston moves between the third through hole A and the third through hole B, the damping liquid can flow through the third damping channel; when the piston moves between the fourth flow hole a and the fourth flow hole B, the damping fluid can flow through the fourth damping passage. In the moving process of the piston, the first damping channel, the third damping channel and the fourth damping channel continuously participate in the flowing of the damping liquid, so that the viscous damper generates different output forces, and the output force of the viscous damper can be designed to be the maximum or minimum output force when the piston moves in the middle section of the damping cavity according to different requirements. A plurality of viscous dampers in the technical scheme with different designs can form different damper combinations to adapt to the impact of complex external force on a building structure.
Further, the at least two first damping channels extend along the axial direction of the cylinder barrel and are uniformly arranged around the axis of the cylinder barrel; the at least two third damping channels extend along the axial direction of the cylinder barrel and are uniformly arranged around the axis of the cylinder barrel; the at least two fourth damping channels extend along the axial direction of the cylinder barrel and are uniformly arranged around the axis of the cylinder barrel; a damping piece used for adjusting the flow cross section of the damping channel is installed in the at least one damping channel, and the damping channel comprises a first damping channel, a third damping channel and a fourth damping channel.
Set up the damping passageway along the axial of cylinder, can improve the processing convenience of damping passageway, simultaneously because the even arrangement of damping passageway, under the exogenic action, when the piston moved, because damping fluid can be even flow in the damping passageway, make the resultant force of damping fluid to the effort of piston can roughly be the same with the axis direction of cylinder, make the piston can move along the axis direction of cylinder, avoid because the damping fluid is to its effort inhomogeneous, and lead to the piston to have the inclined tendency, increase the frictional force of piston and cylinder, the life of reduction equipment.
After the corresponding damping pieces are installed in the damping channels, the parameters of the manufactured viscous damper can be conveniently adjusted, each damping piece can be a slender rod piece or a hollow pipeline, the flow cross section of the damping channels is changed by the damping pieces, the flow of damping liquid passing through the damping channels is changed, and therefore the output of the viscous damper is adjusted. Different forms of damping elements are installed to change the indexes of the viscous damper correspondingly.
Furthermore, at least one end of the first damping channel extends to the end face of the cylinder body of the cylinder barrel to form a first opening end leading to the outside, and a first plugging piece is detachably arranged on the first opening end; at least one end of the third damping channel extends to the end face of the cylinder body of the cylinder barrel to form a third opening end leading to the outside, and a third plugging piece is detachably arranged on the third opening end; at least one end of the fourth damping channel extends to the end face of the cylinder body of the cylinder barrel to form a fourth opening end leading to the outside, and a fourth plugging piece is detachably arranged on the fourth opening end.
After the opening end is arranged, the damping channel can be opened from the opening end, so that the processing of the damping channel is convenient, the functions of the invention can be conveniently adjusted, particularly the output of the damping channel can be adjusted, when the output of the invention needs to be increased, the plugging piece can be opened, then a sealing component for sealing is stretched into the damping channel, any one of the two circulation holes is plugged, the damping channel loses the effect, and the parameters of the invention including the output are adjusted.
Furthermore, a first sealing element is arranged at one end of the cylinder body, a second sealing element is arranged at the other end of the cylinder body, and the first sealing element, the second sealing element and the space surrounded by the cylinder body form the sealing cavity; the first sealing element is positioned at the end A of the sealing cavity, and the second sealing element is positioned at the end B of the sealing cavity; a third communicating part for communicating the sealing cavity with the third flow through hole A is formed on the first sealing element; or a fourth communicating part for communicating the sealing cavity with the fourth circulation hole B is formed on the second sealing element; or a third communicating part for communicating the seal chamber with the third flow through hole A is formed on the first seal, and a fourth communicating part for communicating the seal chamber with the fourth flow through hole B is formed on the second seal.
Preferably, the third communicating portion is formed by the outer peripheral surface of the first sealing member being recessed radially inward, or the third communicating portion is a third communicating hole provided in the first sealing member, one end of the third communicating hole being provided on the outer peripheral surface of the first sealing member, and the other end of the third communicating hole being provided on an end surface of the first sealing member facing the seal chamber; the fourth communicating portion is formed by the outer peripheral surface of the second sealing member being recessed radially inward, or the fourth communicating portion is a fourth communicating hole provided in the second sealing member, one end of the fourth communicating hole being provided on the outer peripheral surface of the second sealing member, and the other end of the fourth communicating hole being provided on an end surface of the second sealing member facing the seal chamber.
The communication part is arranged to enable the opening of the circulation hole, which is positioned on the inner surface of the cylinder, to be positioned on the cylinder corresponding to the first sealing piece or the second sealing piece, so that the effective length of the damping channel is prolonged to the maximum extent.
Further, an anti-blocking part is arranged on the outer peripheral surface of the piston, an anti-blocking cavity communicated with the sealing cavity is formed between the anti-blocking part and the inner peripheral surface of the cylinder, and when the piston moves to one end of the sealing cavity, the third flow hole A or the fourth flow hole B can be communicated with the sealing cavity through the anti-blocking cavity. The anti-blocking portion may be formed by chamfering the outer circumferential surface of the piston, or a recessed portion formed by recessing the outer circumferential surface of the piston toward the radially inner side may be provided on one side or both sides of the outer circumferential surface of the piston.
After the anti-blocking part is set on the outer peripheral surface of the piston, the length of the damping channel can be effectively prolonged to reduce the volume of the viscous damper under the condition of ensuring the overall strength of the piston.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a view along a-a in fig. 1.
Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 4 is an enlarged view of a portion B in fig. 3.
Fig. 5 is a schematic structural diagram of a third embodiment of the present invention.
Fig. 6 is an enlarged view of a portion C-C in fig. 5.
Fig. 7 is a schematic structural diagram of a fourth embodiment of the present invention.
Fig. 8 is an enlarged view of a portion D in fig. 7.
Detailed Description
In the drawings, the arrow S marked where appropriate indicates the axial direction of the cylinder, i.e. the direction of extension of the axis of the cylinder, which is the same as the direction of extension of the axis of the seal chamber. The axial direction described herein refers to the axial direction of the cylinder. The radial direction in this context is a direction orthogonal to the axial direction.
Example 1
Referring to fig. 1 and 2, an index-variable viscous damper 100 includes a cylinder 41 having a circular seal chamber 40, a piston 15 disposed in the seal chamber 40, and a guide rod 14 for driving the piston 15 to move in the seal chamber along the axial direction of the cylinder, wherein the piston 15 keeps a sealing contact with the inner surface of a cylinder 49 of the cylinder 41 when moving, two ends of the seal chamber 40 along the axial direction are respectively referred to as a seal chamber a end 401 and a seal chamber B end 402, three first damping channels 43 and three second damping channels 45 are disposed in the cylinder 49 of the cylinder, and the seal chamber 40 is filled with damping fluid.
The first seal 32 is mounted on one end of the cylinder, the second seal 33 is mounted on the other end, the gland nut 31 is screwed on the screw thread of the inner wall of the cylinder, and the second seal 33 is fixed in the inner cavity of the cylinder 41 in a sealing manner, the sub-cylinder 18 is fixed in the inner wall of the cylinder by screw connection, and the first seal 32 is fixed in the inner cavity of the cylinder 41 in a sealing manner, and the space enclosed by the first seal 32, the second seal 33 and the cylinder 41 becomes the seal cavity 40. The first seal 32 is located at the sealed chamber a end 401 and the second seal 33 is located at the sealed chamber B end 402.
Since the first and second sealing elements each have a certain thickness, they have a guiding effect on the movement of the guide bar 14 and thus also become a guide for the guide bar 14.
One end of the guide rod 14 penetrates through the compression nut 31, the second sealing element 33 and the first sealing element 32 in sequence and then extends into the auxiliary cylinder cavity 19 of the auxiliary cylinder 18, the other end of the guide rod is fixedly provided with a first mounting lug 11, and the first mounting lug 11 is provided with a first mounting hole 12. The first mounting lug 11 is connected to the guide rod 14 by screw threads, and a nut 13 for preventing the screw threads of the first mounting lug 11 from being reversed is screwed on the guide rod 14. A second mounting lug 16 is fixedly mounted on one end of the auxiliary cylinder 18 away from the cylinder tube, and a second mounting hole 17 is formed in the second mounting lug 16.
The first damping channel 43 and the second damping channel 45 extend along the axial direction of the cylinder 41 and are uniformly arranged around the axis of the cylinder, that is, the first damping channel 43 and the second damping channel 45 are arranged at intervals around the axis of the cylinder.
Both ends of the first damping channel 43 extend to both end faces of the cylinder barrel, respectively, forming a first open end leading to the outside. Both ends of the second damping channel 45 extend to both end faces of the cylinder respectively to form a second open end leading to the outside. A blocking member 44 is detachably provided at the first open end and the second open end, and the blocking member 44 in this embodiment is an outer plug, and an inner wall of the open end is provided with an inner thread engaged with the outer thread of the outer plug.
It will be appreciated that in other embodiments, the first open end may be provided at only one end of the first damping channel. Or a second open end may be provided at only one end of the second damping channel.
In other embodiments, the first damping channel and the second damping channel may be further arranged as two, four, five or more, and may be specifically arranged according to the output force of the damper and other requirements. The number of first damping channels and second damping channels may also be different.
In the middle portion of the cylinder 49 of the cylinder 41 corresponding to the seal chamber 40,
corresponding to each first damping channel 43, a first through hole a431 and a first through hole B432 are formed in the cylinder 49 of the cylinder 41, the first through hole a431 and the first through hole B432 communicate with the corresponding first damping channel and the seal cavity 40, and the second through hole B432 is closer to the seal cavity B end 402 than the first through hole a 431.
Corresponding to each second damping channel 45, a second flow hole A451 and a second flow hole B452 for communicating the second damping channel 45 with the seal chamber 40 are formed in the cylinder 49 of the cylinder, an opening of the second flow hole A451, which is located in the inner surface of the cylinder, is formed in the end 401 of the damping chamber A, and an opening of the second flow hole B452, which is located in the inner surface of the cylinder, is formed in the end 402 of the damping chamber B.
The first flow hole a431 and the first flow hole B432 are located between the second flow hole a451 and the second flow hole B452 in the axial direction of the cylinder, as viewed in the axial direction perpendicular to the cylinder.
At least one of the first flow hole a431 and the first flow hole B432 is in a communication state with the seal chamber 40 when the piston moves. When the piston moves, the second flow hole a451 and the second flow hole B452 are both held in a state of communication with the seal chamber 40.
In the present embodiment, the distance between the first flow through hole a431 and the first flow through hole B432 is larger than the thickness of the piston 15, and when the piston 15 is moving, the piston 15 does not simultaneously close off the first flow through hole a431 and the first flow through hole B432.
In the present embodiment, all the flow holes including the first flow hole a431, the first flow hole B432, the second flow hole a451, and the second flow hole B452 extend outward in the radial direction of the seal chamber to the outer peripheral surface of the cylinder tube 41, and an opening portion that opens to the outside is formed, and a sealing member 42 that seals the opening portion is provided in the opening portion.
The sealing member 42 is an external screw plug, and correspondingly, an internal thread is correspondingly arranged on the inner surface of the opening part. One purpose of the opening part is to facilitate the opening of the convection through hole, the opening of the circulation hole can be conveniently completed by adopting a common drilling machine, and the opening part is tapped after the opening of the circulation hole is completed.
In this embodiment, the sealing member 42 is a detachable member, and when a certain damping channel needs to be cut off, the flow hole can be plugged only by replacing the sealing member with a longer plug with an external thread, so as to cut off the damping channel. When the damping channel does not need to be cut off or the damping channel is cut off in other ways, the opening part can be sealed in an unrecoverable way after the opening of the flow hole is finished, for example, the opening part is sealed by welding or other ways. Of course, the flow holes may be formed from the inside of the cylinder tube, and in this case, the opening portion is not required to be provided.
An anti-blocking part is formed on the outer peripheral surface of the piston 15, the anti-blocking part is an inclined surface 151 formed by chamfering two edges of the outer peripheral surface of the piston 15, an anti-blocking cavity communicated with the sealing cavity is formed between the inclined surface 151 and the inner surface of the cylinder, when the piston 15 moves to one end of the sealing cavity 40, the projection of the inclined surface 151 facing the end on the inner peripheral surface of the cylinder can at least partially cover the second flow through hole A451 or the second flow through hole B452 on the side, so that the second flow through hole A451 or the second flow through hole B452 is communicated with the sealing cavity 40 through the anti-blocking cavity, and the damping fluid in the sealing cavity 40 can enter the second damping channel 45.
In other embodiments, the anti-blocking portion may be formed by radially inwardly recessing the outer circumferential surface of the piston 15.
Example 2
Referring to fig. 3 and 4, this embodiment is an improvement on embodiment 1, in the variable index viscous damper 200, the second flow hole a251 is at least partially located in the radial projection range of the first sealing member 21 and adjacent to the end face of the first sealing member facing the sealing chamber 29. The second flow opening B252 is located at least partially in the radial projection of the second seal 28 and adjacent to the end face of the second seal 28 facing the seal chamber 29.
In the present embodiment, the second flow through hole a251 is located in the radial projection range of the first seal member 21, and the edge of the second flow through hole a251 facing the seal cavity 29 is flush with the end face of the first seal member 21 facing the seal cavity 29. The second flow through hole B252 is located in the radial projection range of the second seal 28, and the edge of the second flow through hole B252 facing the seal cavity 29 is flush with the end face of the second seal 28 facing the seal cavity 29.
A first communicating portion 211 communicating the seal chamber 29 with the second flow hole a251 is formed in the first seal 21; a second communication portion 281 that communicates the seal chamber 29 with the second flow hole B252 is formed in the second seal 28. The first communicating portion 211 is formed by the outer peripheral surface of the first seal 21 being recessed radially inward, and the second communicating portion 281 is formed by the outer peripheral surface of the second seal 28 being recessed radially inward.
In other embodiments, the first communicating portion may also be a first communicating hole provided in the first sealing member, one end of the first communicating hole is provided on the outer circumferential surface of the first sealing member, and the other end of the first communicating hole is provided on the end surface of the first sealing member facing the sealing cavity. The second communicating portion may be a second communicating hole provided in the second seal member, one end of the second communicating hole being provided on an outer peripheral surface of the second seal member, and the other end of the second communicating hole being provided on an end surface of the second seal member facing the seal chamber.
A hollow tube 25 is arranged in the second damping channel 26, an overflow opening 22 is arranged in the hollow tube 25 in correspondence with the second through-opening a251, the overflow opening 22 connecting an inner space 253 of the hollow tube 25 to the second through-opening a251, and an overflow opening 27 is arranged in the hollow tube 25 in correspondence with the second through-opening B252, the overflow opening 27 connecting the inner space 253 of the hollow tube 25 to the second through-opening B252. The installation and replacement of the hollow pipe 25 can be performed by opening the closure 20.
In other embodiments, the hollow pipe may be replaced with an elongated rod, and a gap may be provided between an outer circumferential surface of the rod and an inner circumferential surface of the damping channel to ensure the flow of the damping fluid in the damping channel.
In other embodiments, hollow tubes or elongated rods may also be installed in all damping channels.
The cross section of the rod piece can be circular, square, oval or other polygons, and can be irregular.
Example 3
Referring to fig. 5 and 6, an index-variable viscous damper 300 includes a cylinder 91 having a circular seal chamber 90, a piston 65 disposed in the seal chamber 90, and a guide rod 64 for driving the piston 65 to move in the seal chamber along the axial direction of the cylinder, wherein the piston 65 keeps a sealing contact with the inner surface of a cylinder 99 of the cylinder 91 when moving, two ends of the seal chamber 90 along the axial direction are respectively called a seal chamber a end 901 and a seal chamber B end 902, two first damping channels 93, two third damping channels 95 and two fourth damping channels 96 are disposed in the cylinder 99 of the cylinder, and the seal chamber 90 is filled with damping fluid.
The first seal 82 is mounted on one end of the cylinder tube, the second seal 83 is mounted on the other end, the gland nut 81 is screwed on the screw thread on the inner wall of the cylinder tube, and the second seal 83 is hermetically fixed in the inner cavity of the cylinder tube 91, the sub-cylinder 68 is fixed on the inner wall of the cylinder tube by screw thread connection, and the first seal 82 is hermetically fixed in the inner cavity of the cylinder tube 91, and the space surrounded by the first seal 82, the second seal 83 and the cylinder tube 91 becomes the seal cavity 90. The first seal 82 is located at the sealed chamber a end 901 and the second seal 83 is located at the sealed chamber B end 902.
Since the first and second sealing members each have a certain thickness, they have a guiding effect on the movement of the guide rod 64, and thus also become a guide for the guide rod 64.
One end of the guide rod 64 penetrates through the compression nut 81, the second sealing element 83 and the first sealing element 82 in sequence and then extends into the auxiliary cylinder cavity 69 of the auxiliary cylinder 68, the other end of the guide rod is fixedly provided with the first mounting lug 61, and the first mounting lug 61 is provided with the first mounting hole 62. The first mounting lug 61 is screwed to a guide rod 64, and a nut 63 for preventing reverse rotation of the screw thread of the first mounting lug 61 is screwed to the guide rod 64. A second mounting lug 66 is fixedly mounted on one end of the sub-cylinder 68 away from the cylinder tube, and a second mounting hole 67 is provided in the second mounting lug 66.
The first damping channel 93, the third damping channel 95 and the fourth damping channel 96 extend along the axial direction of the cylinder 91 and are uniformly arranged around the axis of the cylinder, in this embodiment, the third damping channel 95 and the fourth damping channel 96 correspond to each other one by one and extend along the same straight line, and the first damping channel and the third damping channel 95 are arranged at intervals and are also arranged at intervals with the fourth damping channel 96.
In other embodiments, the third damping channel 95 and the fourth damping channel 96 may not extend along the same straight line.
Both ends of the first damping channel 93 extend to both end faces of the cylinder body of the cylinder barrel, respectively, forming a first opening end leading to the outside. One end of the third damping channel 95 extends to the end surface of the cylinder body of the cylinder barrel towards the direction of the second mounting lug to form a third open end leading to the outside. One end of the fourth damping channel 96 extends onto the end face of the cylinder barrel in the direction of the first mounting lug, forming a fourth open end leading to the outside. The first open end, the third open end and the fourth open end are detachably provided with a plugging member 94, the plugging member 94 in this embodiment is an external plug, and an inner wall of the open end is provided with an internal thread engaged with an external thread of the external plug.
The first open end may be provided at only one end of the first damping channel.
In other embodiments, the first damping channel, the third damping channel and the fourth damping channel may be further arranged to be three, four, five or more, and may be specifically arranged according to the output force of the damper and other requirements. The number of the first damping channel, the third damping channel and the fourth damping channel can be different.
Corresponding to each first damper passage 93, a first flow through hole a931 and a first flow through hole B932 are opened in the cylinder 99, the first flow through hole a931 and the first flow through hole B932 communicating the first damper passage 93 with the seal chamber 90, and the second flow through hole B932 is closer to the seal chamber B end 902 than the first flow through hole a 931.
And a third flow hole A951 and a third flow hole B952 which are communicated with the third damping channel 95 and the seal cavity 90 are arranged corresponding to each third damping channel 95, the opening of the third flow hole A951, which is positioned on the inner surface of the cylinder body, is arranged at the end 901 of the damping cavity A, and the third flow hole B952 is positioned in the middle part of the cylinder body of the cylinder barrel corresponding to the seal cavity 90.
Corresponding to each fourth damping passage 96, a fourth circulation hole A961 and a fourth circulation hole B962 for communicating the fourth damping passage 96 and the seal chamber 90 are opened, the fourth circulation hole A961 is located in the middle of the cylinder body of the cylinder barrel corresponding to the seal chamber, and the opening of the fourth circulation hole B962 located in the inner surface of the cylinder body is provided at the end 902 of the damping chamber B.
Viewed in the axial direction of the vertical cylinder, the flow holes are arranged in the following order, from the seal chamber a end 901 to the seal chamber B end 902, in the axial direction of the cylinder, a third flow hole a951, a first flow hole a931, a third flow hole B952, a fourth flow hole a961, a first flow hole B932, and a fourth flow hole B962.
When the piston moves, at least one of the first and third flow holes a931 and B952 is in a state of communication with the seal chamber, and at least one of the first and fourth flow holes B932 and a961 is in a state of communication with the seal chamber.
When the piston moves, the third circulation hole a951 and the fourth circulation hole B962 are both held in a state of communication with the seal chamber 90.
In the present embodiment, in the axial direction, the distance L1 between the two points of the first flow through hole a931 and the farthest point of the third flow through hole B952 is greater than the contact distance L3 between the piston 65 and the cylinder 99, so that when the piston moves, the first flow through hole a931 and the third flow through hole B952 are not blocked by the piston at the same time.
In the axial direction, the distance L2 between the farthest points of the first communication hole B932 and the fourth communication hole a961 is greater than the contact distance L3 between the piston 65 and the cylinder 99, so that the first communication hole B932 and the fourth communication hole a961 are not simultaneously blocked by the piston when the piston moves.
In the present embodiment, all the flow holes including the first flow hole a931, the first flow hole B932, the third flow hole a951, the third flow hole B952, the fourth flow hole a961, and the fourth flow hole B962 extend outward in the radial direction of the seal chamber 90 to the outer peripheral surface of the cylinder 91, and an opening portion that opens to the outside is formed, and a sealing member 92 that seals the opening portion is provided in the opening portion.
The sealing member 92 is an external plug, and correspondingly, an internal thread is correspondingly arranged on the inner surface of the opening part. One purpose of the opening part is to facilitate the opening of the convection through hole, the opening of the circulation hole can be conveniently completed by adopting a common drilling machine, and the opening part is tapped after the opening of the circulation hole is completed.
In this embodiment, the sealing member 92 is a detachable member, and when a certain damping channel needs to be cut off, the flow hole can be plugged only by replacing the sealing member with a longer plug with an external thread, so that the cutting off of the damping channel is completed. When the damping channel does not need to be cut off or the damping channel is cut off in other ways, the opening part can be sealed in an unrecoverable way after the opening of the flow hole is finished, for example, the opening part is sealed by welding or other ways. Of course, the flow holes may be formed from the inside of the cylinder tube, and in this case, the opening portion is not required to be provided.
The third flow passage a951 is located at least partially in the radial projection of the first seal 82 and is adjacent to the end face of the first seal facing the seal chamber 90. The fourth flow opening B962 is located at least partially in the radial projection of the second sealing member 83 and adjacent to the end surface of the second sealing member 83 facing the sealing chamber 90.
In this embodiment, the third flow passage a951 is located in a radial projection range of the first seal 82, and an edge of the third flow passage a951 facing the seal chamber 90 is flush with an end surface of the first seal 82 facing the seal chamber 90. The fourth flow hole B962 is located within the radial projection range of the second sealing member 83, and the edge of the fourth flow hole B962 facing the sealing chamber 90 is flush with the end surface of the second sealing member 83 facing the sealing chamber 90.
A first communication portion 821 for communicating the seal chamber 90 and the third communication hole a951 is formed in the first seal 82; the second seal 83 is provided with a second communicating portion 831 communicating the seal chamber 90 with the fourth flow hole B962. The first communication portion 821 is formed by the outer peripheral surface of the first seal 82 being recessed radially inward, and the second communication portion 831 is formed by the outer peripheral surface of the second seal 83 being recessed radially inward.
In other embodiments, the first communicating portion may also be a first communicating hole provided in the first sealing member, one end of the first communicating hole is opened on the outer circumferential surface of the first sealing member, and the other end of the first communicating hole is opened on the end surface of the first sealing member facing the sealing cavity. The second communicating portion may be a second communicating hole provided in the second seal member, one end of the second communicating hole being provided on an outer peripheral surface of the second seal member, and the other end of the second communicating hole being provided on an end surface of the second seal member facing the seal chamber.
Example 4
Referring to fig. 7 and 8, in the present variable-index viscous damper 400, a hollow pipe 75 is disposed in the third damping channel 76 of the cylinder 74, an overflowing hole 72 is disposed on the hollow pipe 75 corresponding to the third through hole a751, the overflowing hole 72 communicates the inner cavity 753 of the hollow pipe 75 with the third through hole a751, and an overflowing hole 77 is disposed corresponding to the third through hole B752, and the overflowing hole 77 communicates the inner cavity 753 of the hollow pipe 75 with the third through hole B752. The installation and replacement of the hollow pipe 75 can be performed by opening the closure 70.
In other embodiments, the hollow pipe may be replaced with an elongated rod member, and a gap may be formed between an outer circumferential surface of the rod member and an inner circumferential surface of the damping channel to ensure the flow of the damping fluid in the damping channel.
In other embodiments, a hollow pipe or an elongated rod may also be installed in the first damping channel or the fourth damping channel.
The cross section of the rod member can be round, square, oval or other polygonal shapes, and can be irregular.

Claims (9)

1. The variable-index viscous damper comprises a cylinder barrel provided with a circular sealing cavity, a piston arranged in the sealing cavity, and a guide rod for driving the piston to move in the sealing cavity along the axial direction of the cylinder barrel, wherein the piston keeps sealing contact with the inner surface of the cylinder barrel when moving, and two ends of the sealing cavity along the axial direction are respectively called a sealing cavity A end and a sealing cavity B end;
corresponding to each first damping channel, a first flow through hole A and a first flow through hole B are formed in the cylinder body of the cylinder barrel, the first flow through holes A and the first flow through holes B are communicated with the corresponding first damping channels and the sealing cavities, and compared with the first flow through holes A, the first flow through holes B are closer to the ends of the sealing cavities B;
a second flow through hole A and a second flow through hole B are formed in the cylinder body of the cylinder barrel corresponding to each second damping channel, the second flow through holes A and the second flow through holes B are communicated with the corresponding second damping channels and the sealing cavities, the opening of each second flow through hole A, which is located in the inner surface of the cylinder body, is arranged at the end of the corresponding damping cavity A, and the opening of each second flow through hole B, which is located in the inner surface of the cylinder body, is arranged at the end of the corresponding damping cavity B;
viewed along the axial direction of the vertical cylinder barrel, the first flow through hole A and the first flow through hole B are positioned between the second flow through hole A and the second flow through hole B along the axial direction of the cylinder barrel;
when the piston moves, the second through hole A and the second through hole B are both kept in a communication state with the sealing cavity;
when the piston moves, at least one of the first through hole A and the first through hole B is communicated with the seal cavity;
a first sealing element is arranged at one end of the cylinder body, a second sealing element is arranged at the other end of the cylinder body, and the first sealing element, the second sealing element and the space surrounded by the cylinder body form the sealing cavity; the first sealing element is positioned at the end A of the sealing cavity, and the second sealing element is positioned at the end B of the sealing cavity;
a first communicating part for communicating the seal cavity with the second flow through hole A is formed on the first seal; or a second communicating part for communicating the seal cavity with the second flow through hole B is formed on the second seal; or a first communicating portion for communicating the seal chamber with the second flow through hole A is formed in the first seal, and a second communicating portion for communicating the seal chamber with the second flow through hole B is formed in the second seal.
2. The variable index viscous damper of claim 1, wherein the at least two first damping channels extend in an axial direction of the cylinder and are uniformly arranged around an axis of the cylinder; the at least two second damping channels extend along the axial direction of the cylinder barrel and are uniformly arranged around the axis of the cylinder barrel;
a damping member for adjusting the flow cross section of the damping channel is mounted in at least one damping channel, which comprises a first damping channel and a second damping channel.
3. The variable index viscous damper of claim 1,
at least one end of the first damping channel extends to the end face of the cylinder body of the cylinder barrel to form a first opening end leading to the outside; at least one end of the second damping channel extends to the end face of the cylinder body of the cylinder barrel to form a second opening end leading to the outside; and the first opening end and the second opening end are both detachably provided with plugging pieces.
4. The variable index viscous damper of any of claims 1-3,
and an anti-blocking part is arranged on the outer peripheral surface of the piston, an anti-blocking cavity communicated with the sealing cavity is formed between the anti-blocking part and the inner peripheral surface of the cylinder, and when the piston moves to one end of the sealing cavity, the second flow through hole A or the second flow through hole B can be communicated with the sealing cavity through the anti-blocking cavity.
5. The variable-index viscous damper comprises a cylinder barrel provided with a circular sealing cavity, a piston arranged in the sealing cavity, and a guide rod for driving the piston to move in the sealing cavity along the axial direction of the cylinder barrel, wherein the piston keeps sealing contact with the inner surface of the cylinder barrel when moving, and two ends of the sealing cavity along the axial direction are respectively called a sealing cavity A end and a sealing cavity B end;
corresponding to each first damping channel, a first flow through hole A and a first flow through hole B are formed in the cylinder body of the cylinder barrel, the first flow through holes A and the first flow through holes B are communicated with the corresponding first damping channels and the corresponding sealing cavities, and compared with the first flow through holes A, the first flow through holes B are closer to the ends of the sealing cavities B;
a third flow through hole A and a third flow through hole B are formed in the cylinder body of the cylinder barrel corresponding to each third damping channel, the third flow through holes A and the third flow through holes B are communicated with the corresponding third damping channels and the sealing cavity, an opening of the third flow through hole A, which is located in the inner surface of the cylinder body, is formed in the end of the damping cavity A, and the third flow through hole B is located in the middle of the cylinder body of the cylinder barrel corresponding to the sealing cavity;
a fourth circulation hole A and a fourth circulation hole B are formed in the cylinder body of the cylinder barrel corresponding to each fourth damping channel, the fourth circulation holes A and the fourth circulation holes B are communicated with the corresponding fourth damping channels and the sealing cavity, the fourth circulation holes A are located in the middle of the cylinder body of the cylinder barrel corresponding to the sealing cavity, and an opening, located on the inner surface of the cylinder body, of each fourth circulation hole B is formed in the end of the damping cavity B;
observing along the axial direction of the vertical cylinder barrel, and arranging the circulation holes from the end of the sealing cavity A to the end of the sealing cavity B along the axial direction of the cylinder barrel in the following sequence, wherein the third circulation hole A, the first circulation hole A, the third circulation hole B, the fourth circulation hole A, the first circulation hole B and the fourth circulation hole B are arranged in sequence;
when the piston moves, at least one of the first through hole A and the third through hole B is communicated with the sealing cavity, and at least one of the first through hole B and the fourth through hole A is communicated with the sealing cavity;
when the piston moves, the third circulation hole A and the fourth circulation hole B are both kept in a communication state with the sealing cavity.
6. The variable index viscous damper of claim 5, wherein the at least two first damping channels extend in an axial direction of the cylinder and are uniformly arranged around an axis of the cylinder;
the at least two third damping channels extend along the axial direction of the cylinder barrel and are uniformly arranged around the axis of the cylinder barrel;
the at least two fourth damping channels extend along the axial direction of the cylinder barrel and are uniformly arranged around the axis of the cylinder barrel;
a damping piece used for adjusting the flow cross section of the damping channel is installed in the at least one damping channel, and the damping channel comprises a first damping channel, a third damping channel and a fourth damping channel.
7. The index-variable viscous damper of claim 5,
at least one end of the first damping channel extends to the end face of the cylinder body of the cylinder barrel to form a first opening end leading to the outside, and a first plugging piece is detachably arranged on the first opening end;
at least one end of the third damping channel extends to the end face of the cylinder body of the cylinder barrel to form a third opening end leading to the outside, and a third plugging piece is detachably arranged on the third opening end;
at least one end of the fourth damping channel extends to the end face of the cylinder body of the cylinder barrel to form a fourth opening end leading to the outside, and a fourth plugging piece is detachably arranged on the fourth opening end.
8. An index-changing viscous damper according to any of claims 5-7, characterized in that a first seal is mounted at one end of the cylinder and a second seal is mounted at the other end of the cylinder, the first seal, the second seal and the space enclosed by the cylinder forming the seal chamber; the first sealing element is positioned at the end A of the sealing cavity, and the second sealing element is positioned at the end B of the sealing cavity;
a third communicating part for communicating the sealing cavity with the third flow through hole A is formed on the first sealing element; or a fourth communicating part for communicating the sealing cavity with the fourth circulation hole B is formed on the second sealing element; or a third communicating part for communicating the seal chamber with the third flow through hole A is formed on the first seal, and a fourth communicating part for communicating the seal chamber with the fourth flow through hole B is formed on the second seal.
9. An exponential viscous damper according to any of claims 5-7,
and an anti-blocking part is arranged on the outer peripheral surface of the piston, an anti-blocking cavity communicated with the sealing cavity is formed between the anti-blocking part and the inner peripheral surface of the cylinder, and when the piston moves to one end of the sealing cavity, the third flow hole A or the fourth flow hole B can be communicated with the sealing cavity through the anti-blocking cavity.
CN201710727552.6A 2017-08-23 2017-08-23 Variable index viscous damper Active CN107339002B (en)

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CN108193794A (en) * 2017-12-30 2018-06-22 江苏宏丰奥凯机电有限公司 Cartridge type damper

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1125104A (en) * 1965-10-13 1968-08-28 British Railways Board Improvements relating to variable rate dampers
CN103527702A (en) * 2013-10-24 2014-01-22 合肥工业大学 Magneto-rheological damper suitable for high-speed impact/low-speed vibration control system
CN203532614U (en) * 2013-10-24 2014-04-09 合肥工业大学 Magneto-rheological damper suitable for high-speed impact/low-speed vibration control system
JP2014163496A (en) * 2013-02-27 2014-09-08 Takenaka Komuten Co Ltd Fluid damper
CN104033525A (en) * 2014-06-26 2014-09-10 石家庄铁道大学 High-damping-force magnetorheological damper
CN104233951A (en) * 2014-07-24 2014-12-24 中铁大桥局集团武汉桥梁科学研究院有限公司 Multifunctional viscous damper and connecting method of multifunctional viscous damper
CN205226203U (en) * 2015-12-15 2016-05-11 上海瑞纽机械装备制造有限公司 Hydraulic damper with oil pocket automatic compensation
CN207177412U (en) * 2017-08-23 2018-04-03 南京丹枫机械科技有限公司 Varying index viscous damper

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7963377B2 (en) * 2005-04-06 2011-06-21 GM Global Technology Operations LLC Dual stage dampers for vehicles suspensions
DE102007054275B4 (en) * 2007-11-14 2009-07-30 Thyssenkrupp Bilstein Suspension Gmbh Vibration damper and method for producing a three-pipe system for a vibration damper
CN105002998B (en) * 2015-07-22 2017-08-11 南京丹枫机械科技有限公司 A kind of variable force viscous damper

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1125104A (en) * 1965-10-13 1968-08-28 British Railways Board Improvements relating to variable rate dampers
JP2014163496A (en) * 2013-02-27 2014-09-08 Takenaka Komuten Co Ltd Fluid damper
CN103527702A (en) * 2013-10-24 2014-01-22 合肥工业大学 Magneto-rheological damper suitable for high-speed impact/low-speed vibration control system
CN203532614U (en) * 2013-10-24 2014-04-09 合肥工业大学 Magneto-rheological damper suitable for high-speed impact/low-speed vibration control system
CN104033525A (en) * 2014-06-26 2014-09-10 石家庄铁道大学 High-damping-force magnetorheological damper
CN104233951A (en) * 2014-07-24 2014-12-24 中铁大桥局集团武汉桥梁科学研究院有限公司 Multifunctional viscous damper and connecting method of multifunctional viscous damper
CN205226203U (en) * 2015-12-15 2016-05-11 上海瑞纽机械装备制造有限公司 Hydraulic damper with oil pocket automatic compensation
CN207177412U (en) * 2017-08-23 2018-04-03 南京丹枫机械科技有限公司 Varying index viscous damper

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