CN111963607A - Rotary friction damper - Google Patents
Rotary friction damper Download PDFInfo
- Publication number
- CN111963607A CN111963607A CN202010927028.5A CN202010927028A CN111963607A CN 111963607 A CN111963607 A CN 111963607A CN 202010927028 A CN202010927028 A CN 202010927028A CN 111963607 A CN111963607 A CN 111963607A
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- 238000013519 translation Methods 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000007906 compression Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009021 linear effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/02—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together
- F16F7/04—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together in the direction of the axis of rotation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a rotary friction damper, which relates to the technical field of bridge dampers.
Description
Technical Field
The invention relates to the technical field of dampers, in particular to a rotary friction damper.
Background
The application of the seismic isolation and reduction device in a bridge structure can obviously improve the safety of the bridge when the bridge encounters an earthquake and reduce the structural damage, and the main principle is that the seismic isolation and reduction device is utilized to achieve the purposes of prolonging the structural period and consuming the earthquake energy through the structural form on the premise of meeting the normal use function.
The common bridge seismic isolation and reduction device mainly comprises a friction pendulum support, a viscous damper, a mild steel yielding energy dissipation support, a seismic isolation rubber support and the like, wherein: the friction pendulum support adopts a pendulum principle, realizes the effects of prolonging the self-oscillation period of a bridge system and friction energy consumption by utilizing the mutual oscillation of friction surfaces, but the damping ratio of the friction pendulum support is sharply reduced along with the increase of displacement, and the friction pendulum support is not suitable for the design of a bridge with large earthquake intensity; the viscous damper can realize relative motion of the viscous fluid in the cylinder body to convert kinetic energy into internal energy so as to realize energy consumption, but the viscous damper can only realize one-way damping and has high requirement on the sealing of the cylinder body; the soft steel yielding energy dissipation support achieves damping and energy dissipation after soft steel metal yields, but the application range of the soft steel yielding energy dissipation support is limited due to the fact that the external height and the size of the soft steel yielding energy dissipation support are too large; the shock insulation rubber support utilizes the rubber characteristic to carry out shearing energy consumption but is difficult to install and replace. Therefore, it is of great significance to develop a novel structural vibration reduction and isolation device with wide application range and good vibration reduction and isolation effect.
Disclosure of Invention
The invention aims to provide a novel damper which can realize shock absorption and energy consumption.
The embodiment of the invention is realized by the following steps:
a rotary friction damper comprising:
a hinge screw rod;
the damping assembly comprises a rotating sleeve and a translational sleeve which are sleeved on the pivot screw rod and can move along the axial direction of the pivot screw rod, the rotating sleeve and the pivot screw rod form a screw pair or a ball screw pair, the translational sleeve and the pivot screw rod are relatively fixed in the circumferential direction of the pivot screw rod, and the rotating sleeve and the translational sleeve are relatively fixed in the axial direction of the pivot screw rod;
the translation sleeve is provided with a friction part which applies friction force to the rotation sleeve to enable the rotation sleeve to have a tendency of rotating along a second direction opposite to the first direction when the rotation sleeve rotates along the first direction relative to the hinge screw rod.
Preferably, the friction part is arranged outside the outer side wall of the rotating sleeve and is in friction contact with the outer side wall of the rotating sleeve.
Preferably, the friction part comprises a plurality of friction ring pieces coaxial with the rotating sleeve, a rotating ring groove matched with the friction ring pieces is concavely arranged on the outer side wall of the rotating sleeve, and the friction ring pieces can be rotatably embedded into the rotating ring groove relative to the rotating sleeve.
Preferably, the friction part comprises a mounting ring sleeved on the outer side of the friction ring piece along the radial direction of the hinge screw rod, a fixing groove is concavely formed on the inner circumference of the mounting ring, and an extending part which is in a complementary shape with the fixing groove and is clamped in the fixing groove is formed on the outer circumference of the friction ring piece.
Preferably, the translational sleeve is provided with two end covers which are respectively arranged outside two ends of the rotary sleeve along the axial direction of the pivot screw rod, the end covers on two sides are fixedly connected with a friction part between the end covers and the friction part, and the end covers on two sides are matched with the friction part to enclose a cavity for accommodating the rotary sleeve.
Preferably, the end covers at two sides are respectively and relatively rotatably abutted with two ends of the rotating sleeve.
Preferably, the translational sleeve is provided with a fastening bolt, the threaded end of the fastening bolt is parallel to the hinge screw rod and axially penetrates through the mounting ring and the end covers at the two sides, and the part of the fastening bolt, which extends out of the end cover at one side far away from the head of the fastening bolt, is in threaded connection with an axial limiting nut.
Preferably, the pivot screw rod is a bidirectional screw rod;
the number of the rotating sleeves is two, and the two rotating sleeves are respectively connected with the threads in the positive and negative rotating directions on the hinge screw rod.
Preferably, the rotating sleeve and the hinge screw form a ball screw pair.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
(1) the invention mainly arranges the pivot screw rod and the damping component, converts the linear displacement needing to be slowed down into the rotation action and the linear action of the rotating sleeve, and simultaneously performs friction energy consumption on the rotating sleeve in the rotation process of the rotating sleeve, thereby realizing damping and reducing the displacement amplitude.
(2) According to the invention, the periphery of the hinge screw rod is provided with a first external thread and a second external thread with opposite thread turning directions, and two rotating sleeves which are abutted and respectively connected with the first external thread and the second external thread in a matching manner are correspondingly arranged, so that the moment applied to the translation sleeve when the rotating sleeves rotate and generated due to friction force is offset, and the influence of structure unbalance loading on transmission is prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of embodiment 1 of the present invention;
fig. 3 and 4 are schematic views illustrating the assembly of the snap ring, the compression ring and the friction ring sheet in embodiment 1 provided by the invention;
fig. 5 and 6 are schematic structural views of embodiment 2 of the present invention;
[ description of specific symbols ]:
10-pivot screw rod, 20-rotating sleeve, 30-translation sleeve, 31-friction ring sheet, 32-snap ring, 33-compression ring, 34-end cover, 35-fastening bolt, 36-axial limiting nut and 37-extension part.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 and 2, the present embodiment 1 provides a rotary friction damper, which is applied to a bridge, and comprises:
a hinge screw rod 10;
the damping assembly comprises a rotating sleeve 20 and a translation sleeve 30 which are sleeved on the hinge screw rod 10 and can move along the axial direction of the hinge screw rod, the rotating sleeve 20 and the hinge screw rod 10 form a ball screw pair, the translation sleeve 30 and the hinge screw rod 10 are relatively fixed in the circumferential direction of the hinge screw rod 10, and the rotating sleeve 20 and the translation sleeve 30 are relatively fixed in the axial direction of the hinge screw rod 10;
the translation sleeve 30 has a friction portion that applies a friction force to the rotation sleeve 20 so that the rotation sleeve 20 tends to rotate in a second direction opposite to the first direction when the rotation sleeve 20 rotates in the first direction with respect to the hinge screw 10.
In a specific application, the hinge screw rod 10 is fixedly connected with the abutment, the translational sleeve 30 is fixedly connected with the beam body, the axial direction of the hinge screw rod 10 is arranged along the displacement direction of the beam body, and at the moment, the translational sleeve 30 and the hinge screw rod 10 are relatively fixed in the circumferential direction of the hinge screw rod 10 and are in a static state. When the displacement of the beam occurs, the translation sleeve 30 translates back and forth on the hinge screw 10. At this time, because the translational sleeve 30 and the rotating sleeve 20 are relatively fixed in the axial direction of the hinge screw 10, and the rotating sleeve 20 is in threaded connection with the external thread on the hinge screw 10, the moving action of the translational sleeve 30 drives the rotating sleeve 20 to rotate along the first direction relative to the hinge screw 10. At this time, friction occurs between the friction portion of the translational sleeve 30 and the rotary sleeve 20, so that the rotary sleeve 20 is subjected to friction force which makes the rotary sleeve have a reverse rotation trend, energy is consumed, and a damping effect is achieved.
For the friction part in the translational sleeve 30, it can be selected to be in friction contact with the end of the rotary sleeve 20, i.e. friction energy consumption for the rotary sleeve 20 can be realized. As a preferred embodiment, in the present embodiment 1, the friction portion is disposed outside the outer side wall of the rotating sleeve 20 and is in friction contact with the outer side wall of the rotating sleeve 20.
More specifically, when adopting the friction portion to locate the outer scheme of rotation lateral wall, above-mentioned friction portion can adopt the friction section of thick bamboo that is the bobbin ring form, and direct cover is established outside rotating sleeve 20, and as preferred embodiment, in this embodiment, friction portion includes a plurality of and rotates the friction ring piece 31 of cover 20 coaxial line, the concave rotation annular groove that is equipped with friction ring piece 31 looks adaptation on the lateral wall of rotating sleeve 20, friction ring piece 31 can rotate sleeve 20 relatively and imbed in rotating the annular groove rotatoryly.
Since the friction ring piece 31 is embedded in the rotation ring groove, the friction contact area between the friction part and the rotation sleeve 20 can be set larger, thereby improving the damping effect of the friction part on the rotation sleeve 20. Meanwhile, since the friction ring piece 31 is embedded in the rotating ring groove, the friction ring piece 31 also has the effect of driving the entire rotating sleeve 20 to move axially along the hinge screw rod 10.
In addition, referring to fig. 3 and fig. 4, in this embodiment 1, in order to facilitate the installation of the friction ring plate 31, the friction portion includes a mounting ring sleeved on the outer side of the friction ring plate 31 along the radial direction of the hinge screw 10, a fixing groove is concavely formed on the inner circumference of the mounting ring, an extension portion 37 having a shape complementary to the fixing groove and engaged in the fixing groove is formed on the outer circumference of the friction ring plate, so that the friction ring plate 31 and the mounting ring are relatively fixed in the circumferential direction and the radial direction of the hinge screw 10.
Further, in this embodiment 1, the translational sleeve 30 has two end caps 34 respectively disposed outside two ends of the rotary sleeve 20 along the axial direction of the hinge screw 10, the end caps 34 at two sides are fixedly connected to the friction portion between the two end caps, the end caps 34 at two sides enclose a cavity for accommodating the rotary sleeve 20 in cooperation with the friction portion, and the end caps 34 at two sides respectively abut against two ends of the rotary sleeve 20 in a relatively rotatable manner.
The whole translation sleeve 30 and the rotating sleeve 20 can be arranged into a whole through the structure, and no matter the rotating sleeve 20 moves in the forward direction or the reverse direction, the rotating shaft 20 is always fixed with the translation sleeve 30 in the axial direction of the hinge screw rod 10.
More specifically, in order to reduce the processing difficulty, in this embodiment 1, the mounting ring is mainly composed of a plurality of compression rings 33 and snap rings 32 which are coaxially and alternately arranged and connected in sequence along the axial direction of the hinge screw 10, and the fixing groove is formed on the inner periphery of the snap ring 32; meanwhile, the translation sleeve 30 is provided with a fastening bolt 35, the thread end of which is parallel to the hinge screw rod 10 and axially penetrates through the mounting ring and the end covers 34 at two sides, and the part of the fastening bolt 35 extending out of the end cover 34 is in threaded connection with an axial limiting nut 36 so as to connect and fix the whole translation sleeve 30 into a whole.
More importantly, in this embodiment 1, the hinge screw 10 is a bidirectional screw;
the number of the rotating sleeves 20 is two, and the two rotating sleeves 20 are respectively connected with the threads in the positive and negative rotation directions on the hinge screw rod 10.
The purpose of this design is to: because the translational sleeve 30 and the rotary sleeve 20 generate friction torque when moving circumferentially, the two rotary sleeves 20 are adopted, the internal friction torque directions are opposite and offset, and the axial unbalance loading of the hinge screw rod 10 is avoided.
Meanwhile, in this embodiment 1, at the same time, the two rotating sleeves 20 are sequentially arranged along the axial direction of the hinge screw 10, and opposite end portions of the two rotating sleeves 20 can be relatively rotatably abutted together, so as to realize the function of fixing the rotating sleeves 20 and the translation sleeves 30 in the axial direction of the hinge screw 10. In addition, the operator can arrange the rotating sleeve 20 to form a screw pair with the hinge screw 10 according to his own requirement, instead of forming a ball screw pair with the hinge screw.
Example 2
Referring to fig. 5 and fig. 6, the embodiment 2 is substantially the same as the embodiment 1, and the main difference between the two embodiments is: in embodiment 2, the number of the rotating sleeves 20 is 1, and the hinge screw 10 is also a one-way screw, which can not cancel out the torque applied by the rotating sleeve 20 to the translation sleeve 30, but the processing is more convenient and the implementation cost is lower.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A rotary friction damper, comprising:
a hinge screw rod;
the damping assembly comprises a rotating sleeve and a translational sleeve which are sleeved on the pivot screw rod and can move along the axial direction of the pivot screw rod, the rotating sleeve and the pivot screw rod form a screw pair or a ball screw pair, the translational sleeve and the pivot screw rod are relatively fixed in the circumferential direction of the pivot screw rod, and the rotating sleeve and the translational sleeve are relatively fixed in the axial direction of the pivot screw rod;
the translation sleeve is provided with a friction part which applies friction force to the rotation sleeve to enable the rotation sleeve to have a tendency of rotating along a second direction opposite to the first direction when the rotation sleeve rotates along the first direction relative to the hinge screw rod.
2. The rotary friction damper according to claim 1, wherein said friction portion is disposed outside an outer side wall of the rotary sleeve and is in frictional contact with the outer side wall of the rotary sleeve.
3. The rotary friction damper according to claim 2, wherein said friction portion includes a plurality of friction ring segments coaxial with said rotating sleeve, said rotating sleeve having a rotating ring groove formed on an outer side wall thereof in a recessed manner, said friction ring segments being rotatably fitted into said rotating ring groove with respect to said rotating sleeve.
4. The rotary friction damper according to claim 2, wherein the friction part includes a mounting ring fitted around an outer side of the friction ring piece in a radial direction of the hinge screw, a fixing groove is concavely formed on an inner circumference of the mounting ring, and an extension part having a shape complementary to the fixing groove and engaged in the fixing groove is formed on an outer circumference of the friction ring piece.
5. The rotary friction damper according to claim 2, wherein the translational sleeve has two end caps respectively disposed outside two ends of the rotary sleeve along the axial direction of the hinge screw, the end caps at two sides are fixedly connected to the friction portion therebetween, and the end caps at two sides enclose a cavity for accommodating the rotary sleeve in cooperation with the friction portion.
6. The rotary friction damper according to claim 5, wherein the end caps on both sides are rotatably abutted against both ends of the rotary sleeve, respectively.
7. The rotary friction damper according to claim 5, wherein said translational sleeve has a fastening bolt having a threaded end extending through the mounting ring and the end caps at both sides thereof in parallel with the hinge screw, and an axial limit nut is threadedly connected to a portion of said fastening bolt extending out of the end cap at a side remote from the head thereof.
8. The rotary friction damper according to claim 2,
the hinge screw rod is a bidirectional screw rod;
the number of the rotating sleeves is two, and the two rotating sleeves are respectively connected with the threads in the positive and negative rotating directions on the hinge screw rod.
9. The rotary friction damper according to any of claims 1 to 8, wherein said rotating sleeve and hinge screw form a ball screw pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010927028.5A CN111963607B (en) | 2020-09-07 | 2020-09-07 | Rotary friction damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010927028.5A CN111963607B (en) | 2020-09-07 | 2020-09-07 | Rotary friction damper |
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| Publication Number | Publication Date |
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| CN111963607A true CN111963607A (en) | 2020-11-20 |
| CN111963607B CN111963607B (en) | 2024-06-25 |
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| CN202010927028.5A Active CN111963607B (en) | 2020-09-07 | 2020-09-07 | Rotary friction damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879476A (en) * | 2021-01-04 | 2021-06-01 | 山东电力工程咨询院有限公司 | Chimney hangs passive frequency modulation damping vibration attenuation and ends and shake device of inner tube and chimney |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879476A (en) * | 2021-01-04 | 2021-06-01 | 山东电力工程咨询院有限公司 | Chimney hangs passive frequency modulation damping vibration attenuation and ends and shake device of inner tube and chimney |
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| CN111963607B (en) | 2024-06-25 |
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