Pneumatic vibration absorption multi-energy dissipation breeze vibration suppression device for cable or rod structure

Abstract

The present invention discloses a pneumatic vibration absorbing multi-energy-consuming breeze vibration suppression device for a cable or rod structure, comprising a bearing, a first rubber layer, a rubber gas spring, a dynamic vibration absorber and a spoiler. The bearing is fixed on the surface of the cable or rod structure, and the first rubber layer is fixed on the outer ring surface of the bearing along the circumferential direction of the bearing; the rubber gas spring is wrapped on the surface of the first rubber layer along the circumferential direction of the first rubber layer, the dynamic vibration absorber is fixed on the surface of the rubber gas spring along the annular direction of the rubber gas spring, and the spoiler is fixed on the outer ring surface of the dynamic vibration absorber along the radial direction.

Description

Technical Field

[0001] The present invention belongs to the technical field of power transmission lines, and in particular relates to a pneumatic vibration absorption and multiple energy dissipation breeze vibration suppression device for a cable or rod structure, which is mainly used to control the vibration response of a power transmission line. Background Art

[0002] Ultra-high voltage transmission lines have high poles and large spans. When the conductors are subjected to wind loads, high-frequency, low-amplitude breeze vibrations will occur, and the periodic vibrations of the conductors will cause fatigue damage. Therefore, in high-voltage overhead lines, vibration control devices are generally installed to suppress breeze vibrations. At present, due to the simple structure of existing vibration control devices, when the conductors vibrate in the breeze, they cannot effectively consume vibration energy to alleviate the vibration of the transmission line, causing fatigue damage to the transmission tower poles and conductors, affecting the normal operation of the transmission network. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a pneumatic vibration absorption and multiple energy dissipation breeze vibration suppression method for cable or rod structures, aiming to reduce the vibration response of high-voltage overhead lines under breeze loads and enhance energy dissipation and vibration reduction. In order to enhance the energy dissipation effect, the flow field around the conductor is changed to reduce the breeze vibration response, and at the same time, particle friction collision is combined with a dynamic vibration absorber to dissipate energy in stages, and a pneumatic vibration absorption and multiple energy dissipation breeze vibration suppression method for cable or rod structures is proposed.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A pneumatic vibration absorbing multi-energy-consuming breeze vibration suppression device for a cable or rod structure comprises a bearing, a first rubber layer, a rubber gas spring, a dynamic vibration absorber and a spoiler. The bearing is fixed on the surface of the cable or rod structure, and the first rubber layer is fixed on the outer ring surface of the bearing along the circumferential direction of the bearing; the rubber gas spring is wrapped around the surface of the first rubber layer along the circumferential direction of the first rubber layer, the dynamic vibration absorber is fixed on the surface of the rubber gas spring along the annular direction of the rubber gas spring, and the spoiler is fixed on the outer ring surface of the dynamic vibration absorber along the radial direction.

[0006] As a further technical solution, the rubber gas spring is composed of a second rubber layer and compressed gas filled inside. The diameter of the second rubber layer is larger than that of the first rubber layer, and the second rubber layer is a closed ring.

[0007] As a further technical solution, the thickness of the first rubber layer is greater than that of the second rubber layer, and the second rubber layer is a rubber film.

[0008] As a further technical solution, the dynamic vibration absorber is composed of a mass block, particles, a viscoelastic material and a third rubber layer. The viscoelastic materials are respectively attached to the outer side of the second rubber layer and the inner side of the third rubber layer, and are distributed in a ring shape. The mass block is fixed on the two layers of viscoelastic material along the radial direction, and the dynamic vibration absorber is divided into multiple independent cavities, and the particles are accumulated inside each cavity.

[0009] As a further technical solution, the mass blocks include a plurality of mass blocks, and the plurality of mass blocks are evenly distributed along the circumferential direction of the second rubber layer and the third rubber layer.

[0010] As a further technical solution, the spoiler is a triangular structure, which includes a plurality of spoilers, and the plurality of spoilers are evenly distributed along the circumference of the third rubber layer.

[0011] As a further technical solution, the bearing includes a cage, an inner race, an outer race and balls. The balls are distributed in the cage, the inner race is located on the inner ring of the cage, and the outer race is located on the outer ring of the cage.

[0012] As a further technical solution, the inner raceway ring is fixed to the outer ring of the cable or rod structure.

[0013] As a further technical solution, the first rubber layer is fixed on the outer ring of the outer raceway ring.

[0014] As a further technical solution, the particles and mass blocks are both made of shape memory alloy.

[0015] The working principle of the present invention is as follows:

[0016] The device is installed on the conductors of high-voltage overhead lines or transmission tower poles. Under adverse conditions such as low temperature and strong winds, ice is formed on the cable or pole structure and the windward surface of the device. Due to the presence of the bearing, the device rotates under the action of gravity through the rotation of the ball, and the original ice-covered surface is transferred to the bottom of the device, changing the windward surface of the device. This cycle repeats itself, so that the surface of the device can be evenly covered with ice, avoiding the dancing of the conductors caused by uneven ice covering and ensuring the normal operation of the transmission line.

[0017] When subjected to wind loads, the spoiler changes the air flow field around the cable or rod structure, affects the aerodynamic characteristics of the cable or rod structure, reduces the aerodynamic lift generated by the cable or rod structure under the action of wind loads, increases the aerodynamic drag, prevents the cable or rod structure from flipping over, maintains overall stability, and reduces the wind vibration response of the cable or rod structure.

[0018] Under the action of wind load, when the cable or rod structure vibrates slightly, friction energy dissipation occurs between the particles, mass blocks and viscoelastic materials in the cavity, converting kinetic energy into heat energy dissipation. When the wind load increases and the cable or rod structure vibrates moderately, the friction in the cavity intensifies and the energy dissipation capacity increases. At the same time, the dynamic vibration absorber is based on the vibration reduction principle of the mass tuned damper. By adjusting the air pressure of the compressed gas in the rubber gas spring, the vibration frequency of the device is kept the same as the vibration frequency of the cable or rod structure, so that the device and the cable or rod structure can achieve resonance. When the cable or rod structure vibrates moderately, the vibration energy is transmitted to the dynamic vibration absorber through the rubber gas spring, and the mass block moves, absorbing most of the vibration energy, enhancing the energy dissipation effect of the device. When the wind load further increases and the cable or rod structure vibrates violently, the particles dissipate friction energy and the dynamic vibration absorber absorbs energy. Due to the large-amplitude vibration, particles collide with each other, mass blocks, and viscoelastic materials, which breaks the energy accumulation and accelerates the energy consumption of the system. At the same time, under the action of wind load, the spoiler and the ball drive device rotate around the cable or rod structure, the collision intensifies, and the energy consumption effect is further enhanced.

[0019] When the particles rub and collide with the mass block and viscoelastic material, the particles, mass block and viscoelastic material are deformed, further improving the vibration reduction control capability of the device and achieving the purpose of multiple energy dissipation vibration reduction; at the same time, when the vibration of the cable or rod structure ends, the device is restored to its initial state by utilizing the significant recoverable deformation ability of the shape memory alloy to ensure normal operation when it is used next time.

[0020] The beneficial effects of the present invention are:

[0021] (1) The present invention achieves uniform ice coating on the cable or rod structure under severe weather conditions by cooperating with the bearing and the spoiler, thereby changing the air flow field and solving the problem of the cable or rod structure dancing from the root.

[0022] (2) The present invention adopts graded multiple energy dissipation. The device dissipates energy in different ways according to the micro-vibration, medium-vibration and strong-vibration responses of the cable or rod structure under different levels of wind loads. As the wind vibration response increases, the vibration reduction and energy dissipation effect of the device is continuously enhanced.

[0023] (3) The present invention adopts particle friction collision to dissipate energy, has stable vibration reduction performance, strong energy dissipation effect, good energy dissipation hysteresis performance, simple structure, low cost, and easy installation and maintenance.

[0024] (4) The present invention uses a rubber gas spring as a stiffness element, which makes the vibration reduction device have stronger nonlinearity. The stiffness can be adjusted by changing the initial air pressure of the gas spring to change the natural frequency of the vibration reduction system. Compared with the traditional tuned mass damper, it is more flexible and adjustable.

[0025] (5) The particles and mass blocks involved in the present invention are made of smart material shape memory alloy. When the cable or rod structure vibrates, multiple vibration reduction purposes are achieved through friction and collision. At the same time, when the cable or rod structure stops vibrating, the shape memory alloy uses its significant recoverable deformation ability to restore the device to its initial state, ensuring normal operation when it is used next time.

[0026] (6) The present invention can be applied to high-voltage overhead lines, and can ensure that the cable or rod structure meets the required safety and durability under wind load, and can produce good social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0028] Figure 1 A schematic diagram of a pneumatic vibration absorption and multiple energy dissipation breeze vibration suppression method for a cable or rod structure;

[0029] In the figure: 1 particles; 2 viscoelastic material; 3 compressed gas; 4 first rubber layer; 5 second rubber layer; 6 cable or rod structure; 7 outer raceway; 8 balls; 9 third rubber layer; 10 mass block; 11 spoiler; 12 cage, 13 inner raceway. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations;

[0032] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0033] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] As described in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a pneumatic vibration absorption multi-energy-consuming breeze vibration suppression device for a cable or rod structure, such as Figure 1 As shown, a pneumatic vibration absorbing multi-energy-consuming breeze vibration suppression device for a cable or rod structure includes a bearing, a first rubber layer, a rubber gas spring, a dynamic vibration absorber and a spoiler; the bearing is fixed on the surface of the cable or rod structure, the first rubber layer is fixed on the outer ring of the bearing, the rubber gas spring is wrapped around the outer ring of the first rubber layer, the dynamic vibration absorber is located on the outer ring of the rubber gas spring; the spoilers are distributed on the outer ring of the dynamic vibration absorber;

[0035] The bearing in this embodiment is fixed on the surface of the cable or rod structure. The bearing is composed of balls 1, a retainer 12, an outer raceway ring 7, and an inner raceway ring 13. A retainer 12 is arranged between the raceway ring 7 and the inner raceway ring 13. A plurality of balls 1 are arranged inside the retainer 12. The distances between the plurality of balls 1 in the retainer are the same, and the inner raceway ring 13 is sleeved on the surface of the cable or rod structure.

[0036] Furthermore, the rubber gas spring is composed of a second rubber layer 5 and compressed gas 3 inside the second rubber layer 5, wherein the thickness of the first rubber layer 4 is much greater than that of the second rubber layer 5, the second rubber layer 5 is only a layer of rubber film, the first rubber layer 4 is a solid annular rubber layer, and the second rubber layer 5 is a hollow annular rubber layer, whose structure is similar to that of existing tires and is filled with compressed gas 3; the first rubber layer 4 is fixed to the outer surface of the raceway ring 7; the diameter of the second rubber layer 5 is greater than the diameter of the first rubber layer.

[0037] Furthermore, the above-mentioned dynamic vibration absorber is composed of a mass block 10, particles 1, a viscoelastic material 2 and a third rubber layer 9. The viscoelastic material 2 includes two layers, one of which is attached to the outer ring of the second rubber layer 5, and the other is attached to the inner ring of the third rubber layer 9. The two layers of viscoelastic material 2 are both distributed in an annular shape, and the mass block 10 includes a plurality of blocks. The plurality of mass blocks 10 are fixed on two annularly distributed viscoelastic materials 2, and the mass blocks 10 are distributed along the radial direction of the viscoelastic material 2; the mass blocks 10 separate the dynamic vibration absorber into a plurality of independent cavities, and a plurality of small particles 1 are accumulated in each independent cavity.

[0038] Furthermore, the particles and mass blocks are both made of shape memory alloy.

[0039] Furthermore, the spoiler 11 includes a plurality of spoilers 11, the cross section of which is a triangular structure, and the plurality of spoilers 11 are distributed on the outer circle of the third rubber layer 9 along the circumferential direction; when subjected to wind loads, the spoilers 11 change the air flow field around the cable or rod structure, affect the aerodynamic characteristics of the cable or rod structure, reduce the aerodynamic lift generated by the cable or rod structure under the action of wind loads, increase the aerodynamic resistance, avoid flipping of the cable or rod structure, maintain overall stability, and reduce the wind vibration response of the cable or rod structure.

[0040] The specific working principle and use method of the pneumatic vibration absorption multi-energy dissipation breeze vibration suppression device for cable or rod structures are as follows:

[0041] The device is installed on the conductor of the high-voltage overhead line or the transmission tower pole. Under adverse conditions such as low temperature and strong wind, ice is formed on the windward surface of the cable or rod structure and the device. Due to the existence of the bearing, the ball 8 rotates, and the device rotates under the action of gravity. The original ice-covered surface is transferred to the bottom of the device, changing the windward surface of the device. This cycle repeats, so that the surface of the device can be evenly covered with ice, avoiding the dancing of the conductor caused by uneven ice, and ensuring the normal operation of the transmission line. When subjected to wind load, the spoiler 11 changes the air flow field around the cable or rod structure, affects the aerodynamic characteristics of the cable or rod structure, reduces the aerodynamic lift generated by the cable or rod structure under the action of wind load, increases the aerodynamic resistance, avoids the cable or rod structure from flipping, maintains overall stability, and reduces the wind vibration response of the cable or rod structure. When the cable or rod structure vibrates slightly, friction energy consumption occurs between the particles 1, the mass block 10 and the viscoelastic material 2 in the cavity, converting the kinetic energy into heat energy dissipation. When the cable or rod structure vibrates moderately, the friction in the cavity intensifies and the energy dissipation capacity is enhanced. At the same time, the dynamic vibration absorber is based on the vibration reduction principle of the mass tuned damper. By adjusting the air pressure of the compressed gas 3 in the rubber gas spring, the vibration frequency of the device is kept the same as the vibration frequency of the cable or rod structure, so that the device and the cable or rod structure can achieve resonance. The vibration energy is transmitted to the dynamic vibration absorber through the rubber gas spring, and the mass block 10 moves, absorbing most of the vibration energy, thereby enhancing the energy dissipation effect of the device. When the cable or rod structure vibrates strongly, the friction energy consumption of the particles 1 and the energy absorption of the dynamic vibration absorber, due to the large-scale vibration, the particles 1 collide with each other, the mass block 10, and the viscoelastic material 2, breaking the energy accumulation and accelerating the energy dissipation of the system. At the same time, under the action of wind load, the spoiler 11 together with the ball 8 drives the device to rotate around the cable or rod structure, the collision intensifies, and the energy dissipation effect is further enhanced. When the particle 1 rubs and collides with the mass block 10 and the viscoelastic material 2, the particle 1, the mass block 10 and the viscoelastic material 2 are deformed, further improving the vibration reduction control capability of the device and achieving the purpose of multiple energy dissipation vibration reduction; at the same time, when the vibration of the cable or rod structure ends, the device is restored to its initial state by utilizing the significant recoverable deformation ability of the shape memory alloy to ensure normal operation during the next application.

[0042] The above-mentioned implementation scheme of the present invention is not a limitation on the protection scope of the present invention, and the implementation mode of this patent is not limited to this. All other forms of modifications, replacements or changes made to the above-mentioned structure of this patent based on the above-mentioned content of this patent, in accordance with the common technical knowledge and customary means in this field, without departing from the above-mentioned basic technical ideas of this patent, should fall within the protection scope of this patent.

Claims

1. A pneumatic vibration absorbing and multiple energy dissipating breeze vibration suppression device for a cable or rod structure, characterized in that: It comprises a bearing, a first rubber layer, a rubber gas spring, a dynamic vibration absorber and a spoiler, wherein the bearing is fixed on the surface of a cable or rod structure, and the first rubber layer is fixed on the outer ring surface of the bearing along the circumferential direction of the bearing; the rubber gas spring is wrapped on the surface of the first rubber layer along the circumferential direction of the first rubber layer, the dynamic vibration absorber is fixed on the surface of the rubber gas spring along the annular direction of the rubber gas spring, and the spoiler is fixed on the outer ring surface of the dynamic vibration absorber along the radial direction; The dynamic vibration absorber is composed of a mass block, particles, a viscoelastic material and a third rubber layer. The viscoelastic materials are respectively attached to the outer side of the second rubber layer and the inner side of the third rubber layer and are distributed in a ring shape. The mass block is fixed on the two layers of viscoelastic material along the radial direction, and the dynamic vibration absorber is divided into multiple independent cavities. The particles are accumulated inside each cavity.

2. The pneumatic vibration absorbing and multi-energy dissipating breeze vibration suppression device for a cable or rod structure according to claim 1, characterized in that: The rubber gas spring is composed of a second rubber layer and compressed gas. The diameter of the second rubber layer is larger than that of the first rubber layer. An annular space is formed between the two and the annular space is filled with compressed air.

3. The pneumatic vibration absorbing and multi-energy dissipating breeze vibration suppression device for a cable or rod structure according to claim 2, characterized in that: The thickness of the first rubber layer is greater than that of the second rubber layer, and the second rubber layer is a rubber film.

4. The pneumatic vibration absorbing and multi-energy dissipating breeze vibration suppression device for a cable or rod structure according to claim 1, characterized in that: The mass blocks include a plurality of mass blocks, and the plurality of mass blocks are evenly distributed along the circumferential direction of the second rubber layer and the third rubber layer.

5. The pneumatic vibration absorbing and multi-energy dissipating breeze vibration suppression device for cable or rod structures according to claim 1, characterized in that: The spoiler is a triangular structure, and includes a plurality of spoilers, which are evenly distributed along the circumference of the third rubber layer.

6. The pneumatic vibration absorbing and multi-energy dissipating breeze vibration suppression device for cable or rod structures according to claim 1, characterized in that: The bearing comprises a cage, a raceway ring and balls. The balls are distributed in the cage, and the raceway ring is located on the outer ring of the cage.

7. The pneumatic vibration absorbing and multi-energy dissipating breeze vibration suppression device for a cable or rod structure according to claim 6, characterized in that: The retaining frame is fixed to the outer ring of the cable or rod structure.

8. The pneumatic vibration absorbing and multi-energy dissipating breeze vibration suppression device for a cable or rod structure according to claim 6, characterized in that: The first rubber layer is fixed on the outer ring of the raceway ring.

9. The pneumatic vibration absorbing and multi-energy dissipating breeze vibration suppression device for a cable or rod structure according to claim 1, characterized in that: The particles and mass blocks are both made of shape memory alloy.

Images