阅读说明：本技术 电压驱动的桥梁结构摩擦耗能装置 (Voltage-driven friction energy dissipation device for bridge structure ) 是由 徐训 徐瑞红 田克兢 朱亚杉 林廷灿 陈浩 刘志昂 于 2020-03-08 设计创作，主要内容包括：本发明公开了一种电压驱动的桥梁结构摩擦耗能装置,第一位移转换齿条固定安装于桥梁,位移放大组件、摩擦耗能组件、电压调节输出组件均固定安装于桥梁与底座之间,第一位移转换齿条与位移输入端传动连接,电压调节输出组件中的主线圈和副线圈分别缠绕于铁芯,导电指针的上端与位移输出端传动连接、下端与主线圈滑动连接,主线圈和导电指针分别外接电源,以形成电回路并在调节电压下驱动摩擦耗能组件摩擦耗能,故桥梁的微小的水平振动经转换为位移放大单元的旋转运动,并使水平振动的位移放大后,在摩擦耗能组件的摩擦散热下得到耗散,且调整导电指针的位置,副线圈对摩擦耗能组件输出变化的电压,以适应不同程度的桥梁振动。(The invention discloses a voltage-driven friction energy dissipation device for a bridge structure, wherein a first displacement conversion rack is fixedly arranged on a bridge, a displacement amplification component, a friction energy dissipation component and a voltage regulation output component are fixedly arranged between the bridge and a base, the first displacement conversion rack is in transmission connection with a displacement input end, a main coil and an auxiliary coil in the voltage regulation output component are respectively wound on an iron core, the upper end of a conductive pointer is in transmission connection with a displacement output end, the lower end of the conductive pointer is in sliding connection with the main coil, the main coil and the conductive pointer are respectively externally connected with a power supply to form an electric loop and drive the friction energy dissipation component to dissipate friction energy under the regulation voltage, so that tiny horizontal vibration of the bridge is converted into rotary motion of a displacement amplification unit, the displacement of the horizontal vibration is amplified, the friction heat dissipation of the friction energy dissipation component is achieved, and the position of the conductive pointer is adjusted, the secondary coil outputs variable voltage to the friction energy dissipation assembly so as to adapt to bridge vibration of different degrees.)

1. The utility model provides a voltage driven bridge structures friction power consumption device which characterized in that includes:

the device comprises a base, a first displacement conversion rack, a displacement amplification assembly, a voltage regulation output assembly and a friction energy consumption assembly;

the base is fixedly arranged below the bridge, the first displacement conversion rack is fixedly arranged on the bridge, the displacement amplification assembly, the voltage regulation output assembly and the friction energy consumption assembly are fixedly arranged between the bridge and the base, the displacement amplification assembly is provided with a displacement input end, a displacement amplification unit and a displacement output end, the first displacement conversion rack is in transmission connection with the displacement input end so as to convert the horizontal vibration of the bridge into the rotary motion of the displacement amplification unit, and the displacement amplification unit is used for amplifying the displacement of the horizontal vibration of the bridge and then transmitting the amplified displacement to the displacement output end; the voltage regulation output assembly comprises a main coil, an auxiliary coil, a conductive pointer and an iron core, wherein the main coil and the auxiliary coil are respectively wound on the iron core, one end of the conductive pointer is in transmission connection with the displacement output end, the other end of the conductive pointer is in sliding connection with the main coil, the main coil and the conductive pointer are respectively externally connected with two poles of a power supply and output regulation voltage to the friction energy consumption assembly, so that the number of turns of the main coil is regulated under the sliding of the conductive pointer; the friction energy consumption assembly is electrically connected with the secondary coil so as to drive the friction energy consumption assembly to consume energy in a friction mode under the adjusting voltage.

2. The voltage-driven friction energy consumption device for bridge structures according to claim 1, wherein: the displacement amplification unit comprises a first gear, a first rotating shaft, a second gear, a third gear and a second rotating shaft, the first gear and the second gear are respectively and fixedly arranged at two ends of the first rotating shaft, and the first gear is meshed with the first displacement conversion rack; the third gear is fixedly arranged on the second rotating shaft and is meshed with the second gear; the diameter of the second gear is larger than the diameter of the first gear, and the diameter of the third gear is smaller than the diameter of the second gear.

3. The voltage-driven friction energy consumption device for bridge structures according to claim 2, wherein: the voltage regulation output assembly further comprises a second displacement conversion rack and a metal plate, the second displacement conversion rack is meshed with the third gear so as to convert the rotary motion of the third gear into the horizontal movement of the second displacement conversion rack, one end of each conductive pointer is fixedly installed on one side, not provided with the rack, of the second displacement conversion rack, the other end of each conductive pointer is installed on the metal plate in a sliding mode, a plurality of conductive holes are formed in the metal plate, the conductive holes correspond to the turns of the main coil one by one, and the number of turns of the main coil is regulated under the sliding of the conductive pointers.

4. The voltage-driven friction energy consumption device for bridge structures according to claim 3, wherein: the main coil comprises a first main coil and a second main coil, the first main coil and the second main coil are respectively wound on the iron core, the positive pole of the power supply is respectively electrically connected with the first main coil and the second main coil, and the negative pole of the power supply is electrically connected with the conductive pointer.

5. The voltage-driven friction energy consumption device for bridge structures according to claim 2, wherein: the friction energy dissipation assembly comprises a brake drum, a support plate, a piezoelectric body, a brake shoe and a friction lining, the brake drum is fixedly mounted on the second rotating shaft, a cavity is formed in the brake drum, the support plate is mounted in the cavity of the brake drum, and the support plate is fixed on the base through a support frame so that the brake drum can rotate relative to the support plate; the piezoelectric body is arranged in a cavity of the brake drum and is electrically connected with the secondary coil; the brake shoe comprises a fixed piece and a sliding piece, the fixed piece is fixedly installed on the supporting plate, the sliding piece is installed on the fixed piece in a sliding mode, one end of the sliding piece is fixedly connected with the piezoelectric body, and the friction lining is fixedly installed on the sliding piece so as to drive the friction lining to move towards the brake drum under the expansion and contraction deformation of the piezoelectric body.

6. The voltage-driven friction energy consumption device for bridge structures according to claim 5, wherein: the friction energy dissipation assembly further comprises pistons, a pull rod and an elastic piece, the pistons are fixedly installed at two ends of the piezoelectric body, the pull rod is fixedly installed on the supporting plate, the brake shoes are symmetrically arranged and comprise two brake shoes, one end of each sliding piece is fixedly connected with the corresponding piston, the other end of each sliding piece is fixedly connected with the pull rod, and two ends of the elastic piece are fixedly connected with the two sliding pieces respectively.

7. The voltage-driven friction energy consumption device for bridge structures according to claim 2, wherein: the voltage-driven friction energy dissipation device for the bridge structure further comprises a sliding rail and a fixed rod, the sliding rail is fixedly installed on the fixed rod, the fixed rod is fixedly installed on the base, and the second displacement conversion rack is slidably installed on the sliding rail.

8. The voltage-driven friction energy consumption device for bridge structures according to claim 7, wherein: and rollers are arranged on two sides of the second displacement conversion rack and are slidably arranged on the rails of the sliding rails.

9. The voltage-driven friction energy consumption device for bridge structures according to claim 7, wherein: the middle of the sliding rail is provided with a through hole matched with the conductive pointer, and the conductive pointer is slidably mounted in the through hole.

10. The voltage-driven friction energy consumption device for bridge structures according to claim 6, wherein: the piezoelectric body is piezoceramics, the support frame includes many folding rods, the elastic component is the spring.

Technical Field

The invention relates to the technical field of structural vibration control, in particular to a voltage-driven friction energy dissipation device for a bridge structure.

Background

Earthquake often causes national and social property loss, and causes massive casualties and collapse and damage of buildings. However, the existing countermeasures are mostly as follows: the earthquake is resisted by enhancing the strength, the rigidity and the like of the structure so as to reduce the negative effects caused by the earthquake, but the cost is high and the economical efficiency is poor; the vibration of the bridge structure is actively controlled through energy consumption and vibration reduction, specifically, the energy input into the bridge is dissipated under the action of a damper, so that the aim of inhibiting the vibration of the bridge structure is fulfilled, and further, the negative effects brought by earthquakes are reduced.

The friction damping device is a vibration damping braking device which utilizes a friction mechanism to realize energy consumption, and the working mechanism of the friction damping device is as follows: the damping device slides or deforms under the action of an external load, and energy generated by vibration is converted into heat energy through mutual friction and dissipated, so that the damping device is simple in structure, low in cost and wide in application range; the metal yielding damper is mostly composed of two flange steel plates, a plurality of energy consumption steel webs and the like, and consumes energy by stages through the friction steel plates and the energy consumption steel webs, but the energy consumption effect of the metal yielding damper is poorer than that of a friction damping device. However, the existing friction damping device has small slippage or deformation, when the amplitude of the bridge structure is not large, the damper is insensitive to the induction of the amplitude, the energy consumption and vibration reduction effects are not good, and how to apply the friction damping device to the bridge structure can actively and effectively adjust the magnitude of the friction force to meet the requirement of the energy consumption of the bridge vibration, so that the negative influence caused by the earthquake is reduced, and the difficulty to be solved is still needed.

Disclosure of Invention

In view of the above, the present invention provides a voltage-driven friction energy dissipation device for a bridge structure, so as to solve the above-mentioned problem that when the displacement of the bridge structure vibration is not large, the vibration energy dissipation of the bridge cannot be actively and effectively controlled.

In order to achieve the above object, the present invention provides a voltage-driven friction energy dissipation device for a bridge structure, comprising:

the device comprises a base, a first displacement conversion rack, a displacement amplification assembly, a voltage regulation output assembly and a friction energy consumption assembly;

the base is fixedly arranged below the bridge, the first displacement conversion rack is fixedly arranged on the bridge, the displacement amplification assembly, the voltage regulation output assembly and the friction energy consumption assembly are fixedly arranged between the bridge and the base, the displacement amplification assembly is provided with a displacement input end, a displacement amplification unit and a displacement output end, the first displacement conversion rack is in transmission connection with the displacement input end so as to convert the horizontal vibration of the bridge into the rotary motion of the displacement amplification unit, and the displacement amplification unit is used for amplifying the displacement of the horizontal vibration of the bridge and then transmitting the amplified displacement to the displacement output end; the voltage regulation output assembly comprises a main coil, an auxiliary coil, a conductive pointer and an iron core, wherein the main coil and the auxiliary coil are respectively wound on the iron core, one end of the conductive pointer is in transmission connection with the displacement output end, the other end of the conductive pointer is in sliding connection with the main coil, the main coil and the conductive pointer are respectively externally connected with two poles of a power supply and output regulation voltage to the friction energy consumption assembly, so that the number of turns of the main coil is regulated under the sliding of the conductive pointer; the friction energy consumption assembly is electrically connected with the secondary coil so as to drive the friction energy consumption assembly to consume energy in a friction mode under the adjusting voltage.

The voltage-driven friction energy dissipation device for the bridge structure, provided by the invention, has the following beneficial effects: the first displacement conversion rack vibrates along the horizontal direction along with the bridge, the displacement of the horizontal vibration of the bridge is indirectly amplified by the displacement amplification unit and then output to the voltage regulation output assembly, the number of turns of the main coil is changed under the sliding of the conductive pointer, the voltage output by the auxiliary coil to the friction energy consumption assembly is changed, and the friction energy consumption assembly is driven to perform friction energy consumption under the driving of the voltage so as to dissipate the energy generated by the horizontal vibration of the bridge; the arrangement of the second displacement conversion rack is convenient for converting the rotary motion into horizontal movement again so as to drive the conductive pointer to horizontally slide, and the arrangement of the metal plate effectively avoids the phenomenon of abrasion after the conductive pointer is contacted and rubbed with the main coil for many times; the piezoelectric body is arranged so as to change the stretching amount (the change of the voltage can cause the vibration stretching amount of the piezoelectric body) under the action of adjusting the voltage and push the friction energy consumption between the brake shoe, the friction lining and the brake drum which rotates.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention, and in which:

fig. 1 is a schematic structural diagram of an embodiment of a voltage-driven friction energy dissipation device for a bridge structure according to the present invention;

FIG. 2 is a schematic diagram of an embodiment of displacement amplification;

FIG. 3 is a schematic diagram of an embodiment of a voltage output regulation assembly;

FIG. 4 is a schematic structural view of an embodiment of a friction dissipating assembly;

FIG. 5 is a schematic structural view of an embodiment of a friction lining mounted to a brake shoe;

FIG. 6 is a top view of one embodiment of a second displacement translating rack slidably mounted to a slide rail;

FIG. 7 is a top view of an embodiment of a slide rail.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As shown in fig. 1-3, fig. 1 is a schematic structural diagram of an embodiment of a voltage-driven friction energy dissipation device for a bridge structure according to the present invention; FIG. 2 is a schematic diagram of an embodiment of a displacement amplification assembly; FIG. 3 is a schematic diagram of an embodiment of a voltage output regulation assembly. The voltage-driven friction energy dissipation device for the bridge structure comprises a first displacement conversion rack 2, a displacement amplification assembly, a friction energy dissipation assembly 4, a base 7 and a voltage regulation output assembly 8, wherein the first displacement conversion rack 2 is fixedly arranged at the end part of a bridge deck beam, namely, one end of the first displacement conversion rack 2, which is not provided with a rack, can be fixedly arranged on the back surface of the bridge 1 and also can be fixedly arranged on two side surfaces of the bridge 1, and the first displacement conversion rack 2 translates along with the horizontal vibration of the bridge 1; the displacement amplification assembly, the friction energy dissipation assembly 4 and the voltage regulation output assembly 8 are all fixedly arranged between the bridge 1 and the base 7, the base 7 is understood in a broad sense, and the base 7 can refer to a bridge pier body and also can refer to a seat body fixedly arranged on a bridge pier or the ground; the displacement amplification assembly comprises a displacement input end, a displacement amplification unit 3 and a displacement output end, the first displacement conversion rack 2 is in transmission connection with the displacement input end of the displacement amplification assembly so as to convert the horizontal vibration of the bridge 1 into the rotary motion of the displacement amplification unit 3, and the displacement amplification unit 3 is used for amplifying the displacement of the horizontal vibration of the bridge 1 and then transmitting the amplified displacement to the displacement output end; the voltage regulation output component 8 comprises a conductive pointer 82, a main coil 83, an iron core 84 and an auxiliary coil 86, wherein the main coil 83 and the auxiliary coil 86 are respectively wound at the upper end and the lower end of the iron core 84, the upper end of the conductive pointer 82 is in transmission connection with the displacement output end, the lower end of the conductive pointer 82 is in sliding connection with the main coil 83, the main coil 83 and the conductive pointer 82 are respectively externally connected with the positive electrode and the negative electrode of a power supply, and therefore an electric loop is formed between the conductive pointer 82 and the main coil 83 so as to regulate the number of turns of the main coil 83 under the sliding of the conductive pointer 82 and output regulation voltage; the friction energy dissipation assembly 4 is in transmission connection with the displacement output end, and the friction energy dissipation assembly 4 is electrically connected with the secondary coil 86 to drive the friction energy dissipation assembly 4 to dissipate friction energy under the regulated voltage, so that the rotary motion of the displacement amplification unit 3 is subjected to friction braking and energy dissipation.

Further, the displacement amplifying unit 3 includes a first gear 31, a second gear 32, a first rotating shaft 33, a third gear 34 and a second rotating shaft 35, the first gear 31 and the second gear 32 are respectively and fixedly installed at two ends of the first rotating shaft 33, the first gear 31 is meshed with the first displacement conversion rack 2, so as to convert the horizontal vibration of the bridge 1 into the rotational motion of the first gear 31; the third gear 34 is fixedly arranged at one end of the second rotating shaft 35, and the third gear 34 is meshed with the second gear 32; the diameter of the second gear 32 is larger than the diameter of the first gear 31, and the diameter of the third gear 34 is smaller than the diameter of the second gear 32. It should be noted that, in this transmission process, the small horizontal vibration of the bridge 1 is not only converted into a rotational motion, but also the small horizontal displacement of the bridge 1 is amplified:

specifically, during rotation, the angular velocities of the first gear 31 and the second gear 32 are the same, i.e., ω₃₁＝ω₃₂Here ω is₃₁Denotes the angular velocity, ω, of the first gear 31₃₂Refers to the angular velocity of the second gear 32; by definition of the transmission ratio, the transmission ratio is the number of driven gears/the number of driving gears is the number of driving wheels/the number of driven wheels, i.e. the transmission ratio is the number of driven wheels/the number of driving wheels, i.e. the number of driven wheels/the number of driven wheels

i represents the gear ratio between the second gear 32 and the third gear 34;

Z₃₂the number of gears representing the second gear 32;

Z₃₄the number of gears representing the third gear 34;

n₃₂indicates the rotational speed of the second gear 32;

n₃₄indicates the rotational speed of the third gear 34;

therefore, when the number of the second gear 32 is greater than the number of the third gear 34, the rotation speed of the second gear 32 is less than the rotation speed of the third gear 34 at the same transmission ratio, and the displacement of the horizontal vibration of the bridge 1 is indirectly amplified by increasing the rotation speed of the third gear 34.

Further, the voltage regulation output assembly 8 further includes a second displacement conversion rack 81 and a metal plate 85, the second displacement conversion rack 81 is engaged with the third gear 34 to convert the rotation of the third gear 34 into horizontal movement of the second displacement conversion rack 81, the upper end of the conductive pointer 82 is fixedly mounted on the side of the second displacement conversion rack 81 where no rack is disposed, i.e. the lower end surface of the second displacement conversion rack 81, the lower end of the conductive pointer 82 is slidably mounted on the metal plate 85, a plurality of conductive holes 851 are formed inside the metal plate 85, the conductive holes 851 correspond to each turn of the main coil 83 one by one, so as to regulate the number of turns of the main coil 83 under the sliding of the conductive pointer 82, and further regulate the voltage output by the voltage regulation output assembly 8 on the sub-coil 86, thereby, the voltage received by the friction energy consumption assembly 4 is adjustable, the metal plate 85 is disposed, the purpose is to avoid the abrasion of the main coil 83 caused by the reciprocating movement of the conductive pointer 82. Specifically, when the power is turned on, the conductive pointer 82 slides on the upper end surface of the metal plate 85 under the horizontal movement of the second displacement conversion rack 81, and the sliding conductive pointer 82 is connected with the corresponding coil in the main coil 83 through the conductive hole 851 in the metal plate 85, that is, the number of turns of the main coil 83 is changed, according to the relationship between the coil and the voltage:

N₁number of turns of the main coil 83;

N₂indicates the number of turns of the secondary winding 86;

U₁represents the voltage of the main coil 83;

U₂representing the voltage of the secondary winding 86.

Thus, when the conductive pointer 82 slides to a certain position of the metal plate 85, the number of turns N of the main coil 83 is N₁Determining the number of turns N of the secondary winding 86₂And voltage U of main coil 83₁Voltage U of secondary winding 86 always remaining constant₂Is changed and then the secondary coil 86 is output to the friction energy consumptionThe voltage of the component 4 is varied.

Further, the main coil 83 includes a first main coil 831 on the left side and a second main coil 832 on the right side, the first main coil 831 and the second main coil 832 are respectively wound around the upper end of the iron core 84, the positive pole of the power supply is electrically connected with the first main coil 831 and the second main coil 832, respectively, and the negative pole of the power supply is electrically connected with the conductive pointer 82. It should be noted that the first main coil 831 and the second main coil 832 are disconnected, that is, they form an electric circuit with the conductive pointer 82 alone, and when the second displacement conversion rack 81 is kept still, that is, the bridge 1 does not vibrate structurally, the conductive pointer 82 is disconnected with both the first main coil 831 and the second main coil 832.

For a better explanation of the friction dissipating assembly 4, please continue to refer to fig. 4-5. The friction energy consumption assembly 4 further comprises a brake drum 41, a piezoelectric body 42, a brake shoe 43, a friction lining 44 and a support disc 45, wherein the brake drum 41 is fixedly mounted at one end of the second rotating shaft 35, so that the brake drum 41 rotates along with the second rotating shaft 35, a cavity is formed inside the brake drum 41, the support disc 45 is mounted in the cavity of the brake drum 41, the support disc 45 is fixed on the base 7 through the support frame 6, so that the brake drum 41 rotates relative to the support disc 45, that is, when the brake drum 41 rotates, the support disc 45 is kept in the cavity of the brake drum 41; the piezoelectric body 42 is installed in the cavity of the brake drum 41, and the piezoelectric body 42 is electrically connected with the secondary coil 86; the brake shoe 43 comprises a fixing member 431 and a sliding member 432, the fixing member 431 is fixedly mounted on the support plate 45, the sliding member 432 is slidably mounted on the fixing member 431, the upper end of the sliding member 432 is fixedly connected with the piezoelectric body 42, and the friction lining 44 is fixedly mounted on the outer side of the sliding member 432, so that the friction lining 44 is driven to move towards the brake drum 41 under the expansion and contraction deformation of the piezoelectric body 42, the friction lining 44 is contacted with the brake drum 41 to generate pressure, and the rotating brake drum 41 and the friction lining 44 are continuously rubbed to generate heat and consume energy.

Further, the energy consumption friction assembly 4 further includes a piston 421, a pull rod 46 and an elastic element 47, the piston 421 is respectively and fixedly installed at the left end and the right end of the piezoelectric body 42, the pull rod 46 is fixedly installed at the supporting plate 45, the brake shoe 43 includes two left and right sides and the brake shoe 43 is symmetrically arranged, the upper end of each sliding element 432 is respectively and fixedly connected with the piston 421 at the corresponding end, the lower end of each sliding element 432 is respectively and fixedly connected with the corresponding end of the pull rod 46, the left end and the right end of the elastic element 47 are respectively and fixedly connected with the sliding elements 432 at the left side and the sliding elements 432 at the right side, and the pull rod 46 and the: when the piezoelectric body 42 does not receive the voltage output by the sub-coil 86, that is, when the conductive pointer 82 is disconnected from the main coil 83, the piezoelectric body 42 can be reset by itself under the action of the tensile force and the elastic force, so as to facilitate the next use.

Preferably, the fixing member 431 is fixedly mounted to the support plate 45 by a plurality of first bolts 481, and the pull rod 46 is fixedly mounted to the support plate 45 by second bolts 482.

For a better illustration of the slide rail 51, please continue to refer to fig. 6-7. The voltage-driven friction energy consumption device for the bridge structure further comprises a sliding rail 51 and a fixing rod 52, wherein the sliding rail 51 is fixedly installed at the top end of the fixing rod 52, the fixing rod 52 is fixedly installed on the base 7, and the second displacement conversion rack 81 is slidably installed on the sliding rail 51.

Further, rollers 87 are installed on the left and right sides of the second displacement conversion rack 81, and the rollers 87 are slidably installed on the rails of the slide rail 51, preferably, the slide rail 51 is rectangular, and the left and right sides thereof are rails adapted to the rollers 87.

Preferably, a through hole 511 matched with the conductive pointer 82 is formed in the middle of the sliding rail 51, and the conductive pointer 82 is slidably installed inside the through hole 511.

Preferably, the piezoelectric body 42 is a piezoelectric ceramic, the supporting frame 6 includes a plurality of folding rods, and the elastic member 47 is a spring.