A mechanical damping method and device for spacer dampers of transmission lines

Abstract

The present invention discloses a mechanical damping method and device for a spacer clamp of a transmission line, including a clamp rod portion of a spacer, a bin portion provided on a multi-split spacer frame, a positioning pin, and a non-linear spring; the bin portion is hollow inside, the clamp rod portion is inserted into the inside of the bin portion through an upper opening of the bin portion, and positioning pins are also correspondingly provided on both sides of the clamp rod portion. A non-linear spring is provided between the positioning pin provided on the left inner wall of the bin portion and the positioning pin provided on the left side of the clamp rod portion, and a non-linear spring is also provided between the positioning pin provided on the right inner wall of the bin portion and the positioning pin provided on the right side of the clamp rod portion. The non-linear spring is a single-piece convex spiral spring with non-linear damping characteristics, and the diameter of the spring coils at both ends of the non-linear spring is smaller than the diameter of the spring coils in the middle. The present invention can greatly attenuate the small-amplitude high-frequency vibration generated by aeolian vibration, thereby improving the service life of the product and ensuring the safe and stable operation of the line.

Description

Technical Field

[0001] The present invention relates to the technical field of spacer dampers, and specifically to a mechanical damping method and device for a spacer clamp of a transmission line. Background Art

[0002] The main purpose of the spacer clamp is to limit the relative movement between sub-conductors, so as to maintain the geometric shape of the bundled conductors. The clamp bears the centripetal force load of the multi-bundled line, as well as the tensile and compressive loads of dancing and torsion. The flexible connection between the spacer frame and the clamp mostly adopts rubber modules and combinations of rubber modules. The rubber module has a simple structure. Affected by aging decay, the decay of its elastic recovery characteristics will affect the stability and reliability of the anti-vibration characteristics of the spacer system.

[0003] The present invention uses mechanical elements and corresponding support structures to achieve a flexible mechanical connection between the spacer frame and the clamp. Its characteristics are single-body middle-convex helical springs with non-linear damping characteristics and combinations of these springs. Summary of the Invention

[0004] The purpose of the present invention is to provide a mechanical damping device for a spacer clamp of a transmission line, which can greatly attenuate the small-amplitude high-frequency vibration generated by aeolian vibration, thereby improving the service life of the product and ensuring the safe and stable operation of the line.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A mechanical damping device for a spacer clamp of a transmission line, including a clamp rod part of the spacer, a bin part arranged on a multi-bundled spacer frame, a positioning pin, and a non-linear spring; the bin part is hollow inside, positioning pins are provided on both inner walls of the bin part, the upper part of the bin part is open, the clamp rod part is inserted into the bin part through the upper opening of the bin part, and positioning pins are also correspondingly provided on both sides of the clamp rod part. A non-linear spring is provided between the positioning pin arranged on the left inner wall of the bin part and the positioning pin arranged on the left side of the clamp rod part, and a non-linear spring is also provided between the positioning pin arranged on the right inner wall of the bin part and the positioning pin arranged on the right side of the clamp rod part. The non-linear spring is a single-body middle-convex helical spring with non-linear damping characteristics, and the diameter of the spring coils at both ends of the non-linear spring is smaller than the diameter of the spring coils in the middle.

[0006] Preferably, the structure of the non-linear spring is symmetric about the central axis.

[0007] Preferably, the end of the clamp rod part is also fixed to the bin part through a rotating shaft.

[0008] Preferably, the structures on both sides of the clamp rod part are symmetric.

[0009] Preferably, when the load or impact increases to a certain extent, the stiffness of the nonlinear spring decreases, the deformation increases accordingly, and the nonlinear spring has good nonlinear strain capacity under large impacts.

[0010] The present invention also provides a method for a mechanical damping device based on the above-mentioned spacer clamp of a transmission line. It is installed according to the structure of the mechanical damping device of the spacer clamp of the transmission line. When the vibration transmitted by the conductor to the spacer causes relative movement between the multi-split spacer frame and the clamp rod, one side of the nonlinear spring is compressed and the other side of the nonlinear spring is released and stretched. When the nonlinear spring is compressed until there is contact between the spring coils, the characteristics of the nonlinear spring become nonlinear, and the natural frequency changes with the degree of compression. When the nonlinear spring releases pressure and stretches, there is no contact between the spring coils.

[0011] Preferably, when the clamp rod swings to the left, the displacement of the compression of the left nonlinear spring and the release of the right nonlinear spring is equal, and the force on the clamp rod also changes symmetrically and reversely. When the left spring is compressed to increase the pressure, the right spring is released to reduce the pressure. Therefore, the swing stroke of the spacer clamp rod will be affected by the nonlinear characteristics of the nonlinear spring; the small-amplitude high-frequency vibration generated by aeolian vibration will be attenuated under the action of spring damping.

[0012] Preferably, when the clamp rod has a large swing stroke, the nonlinear spring enters the high-increment area of stroke and force, and the low-frequency large-amplitude swing will be affected by the nonlinear characteristics of the nonlinear spring, and the spacer and clamp system obtains better damping matching to achieve effective attenuation.

[0013] Preferably, when any nonlinear spring is in a semi-compressed state, that is, the nonlinear spring is compressed by 50%, the clamp rod is in a symmetric and balanced stress state.

[0014] Preferably, a composite damping device formed by combining multiple or single nonlinear springs with rubber modules.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention uses a nonlinear spring group instead of a conventional elastic rubber module, and its damping characteristic curve is stable and the fatigue life is long.

[0017] 2. The structure of the mechanical damping device of the spacer clamp of the transmission line of the present invention is simple, has excellent mechanical properties, is simple to process and has a low cost, etc.

[0018] 3. The present invention can obtain the required damping characteristic curve by combining different specifications of damping springs, can better match the vibration frequency response requirements of different spans, and obtain an optimized anti-vibration effect.

[0019] 4. The mechanical damping device of the spacer clamp for transmission lines of the present invention can greatly attenuate the small-amplitude high-frequency vibrations generated by aeolian vibration, thereby increasing the service life of this product and ensuring the safe and stable operation of the line.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an external structure diagram of the mechanical damping device of the spacer clamp for transmission lines of the present invention;

[0022] Figure 2 is a structure diagram of the non-linear spring of the present invention;

[0023] Figure 3 is a diagram of the frequency characteristics and damping characteristics of the non-linear spring of the present invention;

[0024] Figure 4 is a schematic diagram of the displacement and force conditions of the left and right non-linear springs when the clamp rod of the present invention is in a symmetric balanced force state.

[0025] In the figure: 1, clamp head; 2, clamp rod part; 3, positioning pin; 4, rotating shaft; 5, multi-split spacer frame; 6, bin part; 7, non-linear spring; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1

[0029] The present invention provides a technical solution: as Figures 1-4As shown in the figure, a mechanical damping device for a spacer clamp of a transmission line includes a clamp rod portion 2 of the spacer, a bin portion 6 provided on a multi-split spacer frame 5, a positioning pin 3, and a non-linear spring 7. The interior of the bin portion 6 is hollow. Positioning pins 3 are provided on both inner walls of the bin portion 6. The upper part of the bin portion 6 is open. The clamp rod portion 2 is inserted into the interior of the bin portion 6 through the upper opening of the bin portion 6. Positioning pins 3 are also correspondingly provided on both sides of the clamp rod portion 2. A non-linear spring 7 is provided between the positioning pin 3 provided on the left inner wall of the bin portion 6 and the positioning pin 3 provided on the left side of the clamp rod portion 2. A non-linear spring 7 is also provided between the positioning pin 3 provided on the right inner wall of the bin portion 6 and the positioning pin 3 provided on the right side of the clamp rod portion 2. The non-linear spring 7 is a single-piece convex spiral spring with non-linear damping characteristics. The single-piece convex spiral spring is a spiral spring whose coil diameter decreases towards both ends, that is, the coil diameters at both ends of the non-linear spring 7 are smaller than the coil diameter in the middle. Among them, the structure of the non-linear spring 7 is symmetric about the central axis. When the non-linear spring 7 is compressed until there is contact between the coils, its characteristics become non-linear, and the natural frequency changes with the degree of compression. By combining springs of different specifications, the required natural frequency can be obtained, and the vibration frequency response requirements of different spans can be better matched.

[0030] The multi-split spacer frame 5 can form a quadrilateral, hexagon or octagon frame according to the number of conductors. The clamp head 1 clamps the conductor, and the end of its clamp rod portion 2 is also fixed to the bin portion 6 through a rotating shaft 4 and can rotate slightly. The structures on both sides of the clamp rod portion 2 are symmetric.

[0031] The non-linear spring 7 is supported between the bin wall and the clamp rod portion 2. At the corresponding positions of the clamp rod portion 2 and the bin wall, the inner ring size of the non-linear spring 7 matches that of the two end positioning pins 3, which has the effect of preventing the non-linear spring 7 from sliding and shifting.

[0032] When the spacer is swung due to movement, the non-linear springs 7 on both sides are compressed and stretched. The vibration transmitted by the conductor to the spacer causes relative movement between the multi-split spacer frame and the clamp rod portion, so that one non-linear spring 7 is compressed and the other non-linear spring 7 is released and stretched. When the non-linear spring 7 is compressed until there is contact between the coils, its characteristics become non-linear, and the natural frequency changes with the degree of compression. When the non-linear spring 7 releases pressure and stretches, there is no contact between the coils. Therefore, the swing stroke of the spacer clamp rod will be affected by the non-linear characteristics of the non-linear spring 7; the small-amplitude high-frequency vibration generated by the aeolian vibration will be attenuated under the spring damping effect.

[0033] Under small load amplitudes, the stiffness of the non-linear spring 7 is relatively large and the deformation is small. When the load or impact increases to a certain extent, the stiffness of the non-linear spring 7 decreases and the deformation increases accordingly. Under large impacts, the convex spring in the middle has good non-linear strain capacity, as shown in Figure 3, the frequency characteristics and damping characteristics of the non-linear spring are applicable to the damping characteristics required between the rod supporting the spacer clamp and the frame.

[0034] Embodiment 2

[0035] The present invention also provides a method for a mechanical damping device of a transmission line spacer clamp based on the above. It is installed according to the structure of the mechanical damping device of the transmission line spacer clamp. When the vibration transmitted by the conductor to the spacer causes relative movement between the multi-split spacer frame 5 and the clamp rod part 2, the non-linear spring 7 on one side is compressed and the non-linear spring 7 on the other side is released and stretched. When the non-linear spring 7 is compressed until the spring coils start to contact, the characteristics of the non-linear spring 7 become non-linear, and the natural frequency changes with the degree of compression. When the non-linear spring 7 releases pressure and stretches, there is no contact between the spring coils.

[0036] In Figure 1 , when the double non-linear springs are symmetrically installed, the non-linear springs are in a semi-compressed state (50% compression), and the clamp rod is in a symmetric balanced stress state (see Figure 4 , the solid and dashed lines in the figure respectively represent the displacement and force conditions of the left and right springs). When the clamp rod part 2 swings to the left, the compression of the left non-linear spring 7 and the release of the right non-linear spring 7 have equal displacements, and the force on the clamp rod part 2 also changes symmetrically and reversely. When the left spring compresses and the pressure increases, the right spring releases and the pressure decreases. Therefore, the swing stroke of the spacer clamp rod is affected by the non-linear load of the non-linear spring 7. When small-amplitude high-frequency vibrations generated by aeolian vibration are attenuated under the spring damping effect.

[0037] When the clamp rod part 2 has a large swing stroke, the non-linear spring 7 enters the high-increment area of stroke and force, and the low-frequency large-amplitude swing is affected by the non-linear load of the non-linear spring 7, and the vibration obtains better damping matching to achieve effective attenuation.

[0038] Embodiment 3

[0039] In the present invention, other aspects can also be expanded, and a composite damping device formed by combining multiple or single non-linear springs 7 with rubber modules.

[0040] In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0041] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for a mechanical damping device of a spacer clamp for a transmission line, Characterized in that: Installed according to the structure of the mechanical damping device of the spacer clamp for the transmission line. When the vibration is transmitted from the conductor to the spacer, it causes relative movement between the multi-split spacer frame and the clamp rod part, making the nonlinear spring on one side compress and the nonlinear spring on the other side release and stretch. When the nonlinear spring is compressed until there is contact between the spring coils, the characteristic of the nonlinear spring becomes nonlinear, and the natural frequency changes with the compression degree. When the nonlinear spring releases pressure and stretches, there is no contact between the spring coils; The mechanical damping device of the spacer clamp for the transmission line includes the clamp rod part of the spacer, a bin part arranged on the multi-split spacer frame, positioning pins, and nonlinear springs; the inside of the bin part is hollow, positioning pins are provided on the inner walls on both sides of the bin part, the upper part of the bin part is open, the clamp rod part is inserted into the inside of the bin part through the upper opening of the bin part, and positioning pins are also correspondingly provided on both sides of the clamp rod part. A nonlinear spring is provided between the positioning pin arranged on the left inner wall of the bin part and the positioning pin arranged on the left side of the clamp rod part, and a nonlinear spring is also provided between the positioning pin arranged on the right inner wall of the bin part and the positioning pin arranged on the right side of the clamp rod part. The nonlinear spring is a single-piece convex spiral spring with nonlinear damping characteristics, and the diameter of the spring coils at both ends of the nonlinear spring is smaller than the diameter of the spring coils in the middle.

2. The method for the mechanical damping device of the spacer clamp for the transmission line according to claim 1, Characterized in that: When the clamp rod part swings to the left, the displacement of the compression of the left nonlinear spring and the release of the right nonlinear spring is equal, and the force on the clamp rod part also changes symmetrically and reversely. When the left spring compresses and the pressure increases, the right spring releases and the pressure decreases. Therefore, the swing stroke of the spacer clamp rod will be affected by the nonlinear characteristics of the nonlinear spring; when small-amplitude high-frequency vibrations generated by aeolian vibration are attenuated under the action of spring damping.

3. The method for the mechanical damping device of the spacer clamp for the transmission line according to claim 1, Characterized in that: When the clamp rod part has a large swing stroke, the nonlinear spring enters the high-increment area of stroke and force, and the low-frequency large-amplitude swing will be affected by the nonlinear characteristics of the nonlinear spring, and the spacer and clamp system obtains better damping matching to achieve effective attenuation.

4. The method for the mechanical damping device of the spacer clamp for the transmission line according to claim 1, Characterized in that: When any nonlinear spring is in a semi-compressed state, that is, the nonlinear spring is compressed by 50%, the clamp rod part is in a symmetric balanced stress state.

5. The method for the mechanical damping device of the spacer clamp for the transmission line according to claim 1, Characterized in that: A composite damping device formed by combining multiple or single nonlinear springs with rubber modules.

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