CN107893565B - Screw driving type friction energy consumption shock absorber - Google Patents

Screw driving type friction energy consumption shock absorber Download PDF

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CN107893565B
CN107893565B CN201711365479.9A CN201711365479A CN107893565B CN 107893565 B CN107893565 B CN 107893565B CN 201711365479 A CN201711365479 A CN 201711365479A CN 107893565 B CN107893565 B CN 107893565B
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end cover
friction
transmission rod
frame
nuts
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CN107893565A (en
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何芝仙
陈飞
丁坤
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Anhui Polytechnic University
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Anhui Polytechnic University
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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
    • E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

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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)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention is suitable for the technical field of shock absorption, and provides a spiral transmission type friction energy consumption shock absorber, which is formed by connecting a first end cover, a second end cover and a partition plate through bolts, wherein two left-right rotation nuts are arranged on a transmission rod, the two rotation nuts are respectively axially positioned through thrust bearings, so that the two rotation nuts can only rotate and can not axially move, friction plates are arranged on the two rotation nuts, when the transmission rod axially moves relative to the frame under the action of external force, the two rotation nuts are pushed to rotate, so that the friction plates are arranged to rub a pressure bearing gasket to consume energy, the relatively small relative linear displacement between two points on a building structure is converted into relatively large relative angular displacement between friction pairs of the shock absorber, the consumed energy of the shock absorber is increased, and the shock absorption effect is improved.

Description

Screw driving type friction energy consumption shock absorber
Technical Field
The invention belongs to the technical field of earthquake resistance, and provides a spiral transmission type friction energy dissipation damper.
Background
The installation of energy-consuming dampers in building structures is a very effective means of structural damping and shock resistance. The working principle is that energy-consuming dampers are arranged at specific positions on the structure, and the energy generated by the vibration of the structure is driven to consume by the relative displacement generated between two points on the structure under the action of earthquake or strong wind load, so that the purposes of damping and vibration absorption are achieved, the building structure can be effectively protected, the damage of the building caused by the action of earthquake or strong wind is reduced, and the use safety of the building structure is improved.
Generally, for a friction energy-consuming damper, the consumed energy is closely related to the displacement generated when the damper works, the larger the displacement is, the more energy is consumed by the damper, but the relative displacement between two points of a building structure in normal work is generally smaller, so that the friction energy-consuming damper is small in energy consumption before damage, and the damping effect is not obvious.
Disclosure of Invention
The embodiment of the invention provides a spiral transmission type friction energy consumption damper, which aims to convert smaller relative linear displacement between two points on a building structure into larger relative angular displacement between friction pairs of the damper through a spiral transmission mechanism, so that the energy consumed by the damper is increased, and the damping effect is improved.
The invention is realized in that a screw drive type friction energy dissipation damper comprises:
a rack, comprising: the port is arranged in the first end cover, the second end cover and the partition board are arranged between the port of the first end cover and the port of the second end cover, the port of the first end cover, the port of the second end cover and the partition board are fixedly connected, one end of the first end cover, which is far away from the port, protrudes outwards to form a containing cavity, and through holes are formed in the second end cover and the partition board;
the transmission rod sequentially passes through the through holes of the second end cover and the partition plate and is inserted into the accommodating cavity and is in sliding connection with the through holes of the second end cover, the partition plate and the accommodating cavity;
the transmission type friction energy dissipation component is located in the frame, includes: the rotation transmission subassembly and friction power consumption subassembly, wherein, rotation transmission subassembly includes: the two rotary nuts penetrate through the transmission rod and are respectively fixed on two sides of the partition board, the inner side walls are in threaded connection with the outer side walls of the transmission rod, and the outer side walls are in sliding connection with the inner side walls of the frame;
the friction energy dissipation assembly includes: the two friction plates are respectively fixed on one side of the two rotary nuts, which is close to the two ends of the frame; the two pressure-bearing gaskets are respectively arranged between the end face of the frame and the two friction plates and are contacted with the friction plates.
Further, the transmission rod piece comprises a transmission rod and a connecting sleeve with a pin hole, the connecting sleeve is sleeved on the transmission rod and fixedly connected with the transmission rod, and the transmission rod piece is a threaded transmission screw.
Further, the driven friction energy dissipation member includes:
the thrust bearing is arranged between the two rotating nuts and the partition plate and between the two rotating nuts and the end face of the frame.
Further, at least two thrust bearings are respectively arranged between the two rotating nuts and the partition plate and between the two rotating nuts and the end face of the frame.
Further, the two rotating nuts are a left rotating nut and a right rotating nut.
Further, the pressure-bearing gasket is fixed through the belleville spring, the T-shaped supporting frame and the screw in sequence, the T-shaped supporting frame penetrates through the belleville spring to be in threaded connection with the pressure-bearing gasket, and the screw is in threaded connection with the top of the supporting frame.
Further, the shock absorber further includes: the two connecting rods are arranged at one end of the transmission rod close to the second end cover and fixedly connected with the transmission rod, the other connecting rod is arranged at the bottom end of the extension direction of the accommodating cavity, and the central axes of the two connecting rods and the central axis of the transmission rod are on the same straight line.
The spiral transmission type friction energy consumption shock absorber provided by the embodiment of the invention has the following beneficial effects:
1. the relatively small relative linear displacement between two points on the building structure is converted into relatively large relative angular displacement between the friction pair (namely the friction plate and the pressure-bearing gasket) of the shock absorber, so that the energy consumed by the shock absorber is increased, and the shock absorption effect is improved;
2. through the structural design of the friction energy consumption shock absorber of the left-handed nut and the right-handed nut driven by the driving screw, the double moment of couple of the shock absorber acting on the screw in the working process is offset, and the input and output components of the shock absorber are not affected by torque.
Drawings
FIG. 1 is a cross-sectional view of a screw drive friction dissipative shock absorber provided by an embodiment of the invention;
1. first end cap, 2, drive rod, 3, screw, 4.T support frame, 5, belleville spring, 6, bolt, 7, nut 8, second end cap, 9, connecting sleeve, 10, connecting pin, 11, pressure bearing gasket, 12, friction plate, 13, first screw nut, 14, baffle, 15, second screw nut, 16, thrust bearing, 17, support rod.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a cross-sectional view of a screw-driven friction energy-consuming damper according to an embodiment of the present invention, and only a portion related to the embodiment of the present invention is shown for convenience of explanation.
The shock absorber includes:
a rack, comprising: the port is opposite to the first end cover 1 and the second end cover 8, and the partition 14 is arranged between the port of the first end cover 1 and the port of the second end cover 8, the port of the first end cover 1, the port of the second end cover 8 and the partition 14 are fixedly connected, for example, the port of the first end cover 1 is fixedly connected through the matching of the bolt 6 and the nut 7, one end of the first end cover 1 far away from the port protrudes outwards to form a containing cavity, and through holes are formed in the second end cover 8 and the partition 14;
the transmission rod sequentially passes through the through holes of the second end cover 8 and the partition plate 14 and is inserted into the accommodating cavity and is in sliding connection with the through holes of the second end cover 8, the partition plate 14 and the accommodating cavity;
the transmission type friction energy dissipation component is located in the frame, includes: a rotary transmission assembly and a friction energy consumption assembly, wherein,
a rotary transmission assembly comprising: the two rotating nuts, namely a first rotating nut 13 and a second rotating nut 15, penetrate through the transmission rods and are respectively fixed on two sides of the partition plate 14, the inner side walls of the two rotating nuts (13; 15) are in threaded connection with the outer side walls of the transmission rods, and the outer side walls of the two rotating nuts (13; 15) are in sliding connection with the inner side walls of the frame;
a friction dissipative assembly comprising: the two friction plates 12 are respectively fixed on one side of the two rotating nuts (13; 15) close to the two ends of the frame; the two pressure-bearing gaskets 11 are respectively arranged between the end face of the frame and the two friction plates 12 and are contacted with the friction plates 12;
in an embodiment of the present invention, the transmission link includes: the transmission rod 2 and the connecting sleeve 9 with the pin hole are arranged, the connecting sleeve 9 is sleeved on the transmission rod 2 and fixedly connected with the transmission rod 2, and the transmission rod is a threaded transmission screw;
in an embodiment of the present invention, the spiral driving type friction energy dissipation member further includes:
as other embodiments of the present invention, at least two thrust bearings 16 are provided between the two rotation nuts (13; 15) and the partition plate 14 and between the two rotation nuts (13; 15) and the frame end face, respectively, between the two rotation nuts (13; 15) and the partition plate 14 and between the two rotation nuts (13; 15) and the frame end face, so that the two rotation nuts (13; 15) can only rotate and cannot move axially.
In the embodiment of the invention, in order to offset the double moment of couple acting on the screw rod during the working process of the shock absorber, the output member of the shock absorber is not influenced by the torque, and the two rotating nuts (13; 15) are respectively a left rotating nut and a right rotating nut.
In the embodiment of the invention, the pressure-bearing gasket 11 is fixed through the belleville spring 5, the T-shaped supporting frame 4 and the screw 3 in sequence, the T-shaped supporting frame 4 passes through the belleville spring 5 to be in threaded connection with the pressure-bearing gasket 11, the screw 3 is in threaded connection with the top of the T-shaped supporting frame 4, and the screw 3 pushes the T-shaped supporting frame 4 to axially move, so that the positive pressure, namely the magnitude of friction force, between the friction plate 12 and the pressure-bearing gasket 11 is adjusted.
In an embodiment of the present invention, the shock absorber further includes:
two connecting rods 17, one connecting rod 17 locates the one end that the transmission member is close to second end cover 8, and with transmission member fixed connection, another connecting rod locates the bottom that holds chamber extending direction, and the axis of two connecting rods is on same straight line with the axis of transmission member, and these two connecting rods are used for being fixed in the bumper shock absorber on the building.
The first end cover 1, the second end cover 8 and the partition plate 14 are connected into a whole through bolts to form a frame of the shock absorber, two rotary nuts (13; 15) are installed on a transmission rod, the two rotary nuts (13; 15) are respectively axially positioned through thrust bearings 16, so that the two rotary nuts (13; 15) can only rotate and can not axially move, friction plates 12 are installed on the two rotary nuts (13; 15), when the transmission rod axially moves relative to the frame under the action of external force, the two rotary nuts (13; 15) are pushed to rotate, so that the friction pressure-bearing gaskets 11 provided with the friction plates 12 consume energy, relatively small relative linear displacement between two points on a building structure is converted into relatively large relative angular displacement between friction pairs (namely the friction plates 12 and the pressure-bearing gaskets 11) of the shock absorber, the consumed energy of the shock absorber is increased, and the shock absorbing effect is improved.
The quantitative relation of the working process is as follows:
when the shock absorber is connected between two points of a building structure, the relative displacement is generated between the two points due to the structural vibration, the shock absorber is subjected to axial tension or compression, and the left-handed nutThe left-handed and right-handed nuts are right-handed, and the friction plates arranged on the nuts generate relative displacement, so that energy is consumed. Axial displacement delta and nut rotation angle of shock absorber
Figure GDA0004128164920000051
The relation is that
Figure GDA0004128164920000052
Where t is the lead of the screw flight.
The consumed work W of the shock absorber is equal to the friction work W consumed by the screw pair according to energy conservation 1 And the friction work W consumed by the friction plate 2 And (3) summing. Friction work W consumed by screw pair 1 Can be expressed as
Figure GDA0004128164920000053
Wherein alpha is the lead angle of the spiral, ρ v Equivalent friction angle of screw pair, F a The axial force of the shock absorber, eta is the transmission efficiency of the screw pair
Figure GDA0004128164920000054
On the other hand, the energy W consumed by the four friction plates 2 Can be expressed as
Figure GDA0004128164920000055
Wherein F is the sliding friction coefficient of the friction plate, F is the positive pressing force of the friction plate, and R is the circular arc center radius of the friction plate.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (3)

1. A screw drive friction dissipative damper, the damper comprising:
a rack, comprising: the port is arranged in the first end cover, the second end cover and the partition board are arranged between the port of the first end cover and the port of the second end cover, the port of the first end cover, the port of the second end cover and the partition board are fixedly connected, one end of the first end cover, which is far away from the port, protrudes outwards to form a containing cavity, and through holes are formed in the second end cover and the partition board;
the transmission rod sequentially passes through the through holes of the second end cover and the partition plate and is inserted into the accommodating cavity and is in sliding connection with the through holes of the second end cover, the partition plate and the accommodating cavity;
the transmission type friction energy dissipation component is located in the frame, includes: the rotation transmission subassembly and friction power consumption subassembly, wherein, rotation transmission subassembly includes: the two rotating nuts are penetrated by the transmission rod and respectively fixed on two sides of the partition board, the inner side walls are in threaded connection with the outer side walls of the transmission rod, and the outer side walls are in sliding connection with the inner side walls of the frame;
the friction energy dissipation assembly includes: the two friction plates are respectively fixed on one side of the two rotary nuts, which is close to the two ends of the frame; the two pressure-bearing gaskets are respectively arranged between the end face of the frame and the two friction plates and are contacted with the friction plates;
the transmission type friction energy dissipation member comprises: the thrust bearing is arranged between the two rotating nuts and the partition plate and between the two rotating nuts and the end face of the frame;
at least two thrust bearings are respectively arranged between the two rotating nuts and the partition plate and between the two rotating nuts and the end face of the frame, so that the two rotating nuts can only rotate and cannot axially move;
the two rotating nuts are a left rotating nut and a right rotating nut;
the bearing gasket is fixed through the belleville spring, the T-shaped supporting frame and the screw in sequence, the T-shaped supporting frame penetrates through the belleville spring to be in threaded connection with the bearing gasket, the screw is in threaded connection with the top of the T-shaped supporting frame, and the screw pushes the T-shaped supporting frame to axially move, so that the positive pressure between the friction plate and the bearing gasket, namely the magnitude of friction force, is adjusted.
2. The spiral transmission type friction energy consumption shock absorber according to claim 1, wherein the transmission rod consists of a transmission rod and a connecting sleeve provided with a pin hole, the connecting sleeve is sleeved on the transmission rod and fixedly connected with the transmission rod through a pin.
3. The screw driven friction dissipative vibration absorber according to claim 1, wherein the vibration absorber comprises:
the two connecting rods are arranged at one end of the transmission rod close to the second end cover and fixedly connected with the transmission rod, the other connecting rod is arranged at the bottom end of the extension direction of the accommodating cavity, and the central axes of the two connecting rods and the central axis of the transmission rod are on the same straight line.
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CN109811641B (en) * 2019-02-20 2020-10-20 广州大学 Buffering limiting type rotary friction mass damper
CN109811925A (en) * 2019-02-20 2019-05-28 广州大学 A kind of rotary frcition damper of displacement equations type
CN109707788A (en) * 2019-02-20 2019-05-03 广州大学 A kind of gyrating mass frcition damper
CN110219381B (en) * 2019-07-03 2024-04-26 安徽工程大学 Lifting particle type collision energy dissipation damper
CN111963607B (en) * 2020-09-07 2024-06-25 成都市新筑交通科技有限公司 Rotary friction damper

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JP4766577B1 (en) * 2010-11-26 2011-09-07 株式会社美和テック Damping damper and damping damper mounting structure
CN103169554B (en) * 2013-02-25 2014-12-24 西南交通大学 Assisting-type bearing system antidumping multiple-thread damper for exoskeleton
CN103669638B (en) * 2013-12-31 2015-10-28 长沙理工大学 A kind of rotation energy-consumption shock-absorption device
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CN207829572U (en) * 2017-12-18 2018-09-07 安徽工程大学 A kind of worm drive formula friction energy-dissipating damper

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