Reciprocating sliding type power transmission line tuned mass damper

Abstract

The invention relates to the field of vibration control, in particular to a reciprocating sliding type power transmission line tuned mass damper which comprises a mass ring and a plurality of steel wire rope vibration isolators. The steel wire rope vibration isolators are evenly distributed between the mass ring and the sleeve type sliding mechanism and connected with the mass ring and the sleeve type sliding mechanism, and the sleeve type sliding mechanism is arranged on a power transmission line in a sleeving mode and connected with the power transmission line in a sliding mode. The damper and the whole device are small in occupied space, simple in structure and convenient to install, compared with the prior art, the steel wire rope vibration isolator in the designed damper has the function that a damping element counteracts vibration energy, a sliding part is additionally arranged on the basis, the damper slides back and forth on a power transmission tower, the galloping energy of a power transmission conductor is counteracted, and the damping effect is good. The galloping amplitude of the transmission conductor is greatly reduced, and safe and stable operation of the transmission line is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of vibration control, and in particular to a reciprocating sliding type transmission line tuned mass damper. Background Art

[0002] In cold regions, power transmission lines often face the problem of icing in winter. Icing on conductors will increase the mechanical burden of transmission lines and even lead to problems such as increased conductor sag and excessive stress on towers. More seriously, when the ice-covered conductors are detached, the conductors will violently dance up and down due to the release of gravitational potential energy due to the rapid shedding of ice during the detachment process. This violent movement can cause the conductors to collide with other conductors or even touch the ground, affecting the safe operation of the transmission lines.

[0003] Tuned Mass Damper is a passive vibration control system, which has been widely used in high-rise buildings and engineering projects. The tuned mass damper is mainly composed of a mass system and a spring system. Its working principle is: by adjusting the system parameters, the natural frequency of the tuned mass damper is adjusted to a frequency close to the vibration mode controlled by the main structure. When the controlled body vibrates, the tuned mass damper will produce a resonant behavior opposite to the main structure due to the inertia of the mass block and the restoring force generated by the spring. Thus, during the vibration process, the energy of the main structure vibration is absorbed and the vibration of the main structure is reduced.

[0004] Existing transmission line dampers tend to be of the wire clamp type. This type of damper has a certain control effect on small-amplitude vibrations of the conductor, but has little control effect on the large-amplitude up and down dancing behavior caused by the moment of ice shedding. Summary of the invention

[0005] In order to solve the above technical problems existing in the prior art, the present invention proposes a reciprocating sliding transmission line tuned mass damper, and its specific technical solution is as follows: A reciprocating sliding transmission line tuned mass damper comprises: a mass ring and a plurality of wire rope isolators, a sleeve type sliding mechanism is arranged at the center position inside the mass ring, the plurality of wire rope isolators are evenly distributed between the mass ring and the sleeve type sliding mechanism and are connected to each other, and the sleeve type sliding mechanism is sleeved on the transmission line and is slidably connected to the transmission line.

[0006] Furthermore, the number of the wire rope isolators is no less than 4.

[0007] Furthermore, the sleeve-type sliding mechanism includes: an inner sleeve, an outer sleeve is provided on the outside of the inner sleeve, two groups of evenly distributed circular notches are opened around the wall of the inner sleeve, and two annular track grooves are opened on the inner wall surface of the outer sleeve, and the positions of the two annular track grooves respectively correspond to the positions of the two groups of evenly distributed circular notches; sliding balls are placed at the circular notches, and the sliding balls are simultaneously limited and rolled in the circular notches and their corresponding annular track grooves.

[0008] Furthermore, the spherical surface of one side of the sliding ball is exposed from the circular groove to the inner side of the inner sleeve and is in rolling contact with the power transmission line connected to the inner sleeve, and the spherical surface of the other side of the sliding ball is in rolling contact with the annular track groove corresponding to the circular groove, so that the inner sleeve is slidably connected to the power transmission line connected therein through the sliding ball.

[0009] Furthermore, a vibration isolator support is connected between each wire rope vibration isolator and the outer sleeve.

[0010] Furthermore, the vibration isolator support includes: a top plate and foot plates integrally formed and connected to both sides of the top plate, the foot plates are connected to the outer sleeve by welding, and the top plate is connected to the wire rope vibration isolator by bolt connectors.

[0011] Furthermore, the wire rope isolator comprises: an upper splint, a lower splint and a wire rope, the left and right side surfaces of the upper splint and the lower splint are provided with through holes arranged at intervals, the size of the through holes matches the size of the wire rope, the wire rope connects the upper splint and the lower splint through the through holes and is symmetrically arranged on the two splints; the front and rear side surfaces of the upper splint and the lower splint are provided with bolt holes arranged at intervals, and the bolt holes of the upper splint and the lower splint are not connected to their respective through holes; a row of bolt holes is longitudinally provided in the middle of the top plate, and the row of bolt holes is arranged to correspond to and match the bolt holes of the lower splint and are connected through the bolt connector.

[0012] Furthermore, the mass ring is provided with a plurality of groups of connection holes which are equally spaced, the number of the groups of connection holes being the same as the number of the wire rope isolators, and each group of connection holes is respectively connected to the bolt holes of the upper clamping plate of each wire rope isolator through a bolt connector.

[0013] The advantages of the present invention are that the whole device takes up little space, has a simple structure and is easy to install, and compared with the prior art, the wire rope vibration isolator in the damper of the present invention has the function of a damping element to offset vibration energy, and a sliding part is added on this basis. The damper slides back and forth on the transmission tower to offset the dancing energy of the transmission line, greatly reduce the amplitude of the transmission line dancing, and ensure the safe and stable operation of the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic diagram of the overall structure of a reciprocating sliding transmission line tuned mass damper according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the inner sleeve structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the outer sleeve structure of an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a wire rope vibration isolator according to an embodiment of the present invention; Figure 5 A schematic diagram of a vibration isolator support structure according to an embodiment of the present invention; Figure 6 A schematic diagram of the quality ring structure of an embodiment of the present invention; Figure 7 It is a schematic diagram of the installation and application scenario of the reciprocating sliding transmission line tuned mass damper according to an embodiment of the present invention; In the figure, 1 is an inner sleeve, 2 is an outer sleeve, 3 is a sliding ball, 4 is a wire rope isolator, 5 is a bolt connector, 6 is a mass ring, and 7 is a wire rope isolator support. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and technical effect of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1 As shown, a reciprocating sliding transmission line tuned mass damper according to an embodiment of the present invention comprises: a mass ring 6, a sleeve-type sliding mechanism and four wire rope isolators 4, wherein the sleeve-type sliding mechanism is located at the inner center of the mass ring 6, the four wire rope isolators 4 are evenly distributed between the mass ring 6 and the sleeve-type sliding mechanism and are interconnected with the two, and the sleeve-type sliding mechanism is sleeved on the transmission line and is slidably connected with the transmission line.

[0017] Specifically, Figure 2 and Figure 3As shown, the sleeve type sliding mechanism comprises: an inner sleeve 1, an outer sleeve 2 is arranged outside the inner sleeve 1, 8 circular notches are opened on the wall of the inner sleeve 1, and 4 circular notches are evenly distributed around the wall of the inner sleeve 1 as a group, and two annular track grooves are opened on the inner wall of the outer sleeve 2, and the positions of the two annular track grooves correspond to the positions of the two groups of circular notches evenly distributed around the wall of the inner sleeve 1; a sliding ball 3 is placed at each circular notch, and the spherical surface of one side of the sliding ball 3 is exposed from the circular notch to the inner side of the inner sleeve 1, so that it rolls and contacts with the connected power transmission line, and the spherical surface of the other side of the sliding ball 3 is located in the corresponding annular track groove and rolls and contacts with it, that is, the sliding ball 3 is simultaneously limited and rolled and arranged in the circular notch and its corresponding annular track groove. This structure enables the power transmission line to roll and contact with the sliding ball 3 after it is connected to the inner sleeve 1, thereby realizing the sliding connection between the inner sleeve 1 and the power transmission line, and further realizing the reciprocating sliding of the tuned mass damper of the present invention on the power transmission line.

[0018] like Figure 4 As shown, the wire rope isolator 4 includes: an upper clamping plate, a lower clamping plate and a wire rope, the left and right side surfaces of the upper clamping plate and the lower clamping plate are provided with through holes arranged at intervals, the size of the through holes matches the size of the wire rope, the wire rope connects the upper clamping plate and the lower clamping plate through the through holes and is symmetrically arranged on the two clamping plates, and the connected wire rope has the functions of both spring and damping; the front and rear side surfaces of the upper clamping plate and the lower clamping plate are provided with bolt holes arranged at intervals, and the bolt holes of the upper clamping plate and the lower clamping plate are not connected to their respective through holes.

[0019] Each wire rope vibration isolator 4 is connected to the outer sleeve 2 and is provided with a vibration isolator support 7. Figure 5 As shown, the vibration isolator support 7 includes: a top plate and foot plates integrally formed and connected to both sides of the top plate, a row of bolt holes is longitudinally opened in the middle of the top plate, and the bolt holes on the top plate are matched with the bolt holes on the lower clamping plate, and the lower clamping plate and the top plate are connected by bolt connectors 5; the foot plates are connected to the outer sleeve 2 by welding.

[0020] like Figure 6 As shown, the mass ring 6 is provided with 4 groups of connection holes with equal spacing, and the wire rope isolators 4 are connected through the bolt holes of the respective upper clamping plates corresponding to the connection holes and then fixedly connected using bolt connectors 5. The weight of the mass ring 6 is transferred to the sleeve sliding mechanism through the wire rope isolators 4, and then transferred to the transmission line.

[0021] like Figure 7As shown, two reciprocating sliding transmission line tuned mass dampers are symmetrically installed in the middle of each span of the transmission line on the two transmission towers, and the transmission line is passed through the inner sleeves 1 of the two dampers. When the transmission line dances greatly due to ice shedding, the two dampers will move to both sides of the transmission line respectively. When the line dances downward, the damper will move to the middle of the transmission line, thereby offsetting the dancing energy. Among them, when the transmission line dances greatly, the wire rope vibration isolator offsets the small amplitude of the transmission line dance, and the back and forth movement of the damper offsets the large amplitude of the transmission line dance, thereby ensuring the safe and stable operation of the transmission line.

[0022] The above is only a preferred implementation case of the present invention and does not limit the present invention in any form. Although the implementation process of the present invention is described in detail above, for those familiar with the art, they can still modify the technical solutions recorded in the above examples, or replace some of the technical features therein with equivalents. All modifications, equivalent replacements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reciprocating sliding transmission line tuned mass damper, comprising: A mass ring (6) and a plurality of wire rope isolators (4), characterized in that a sleeve-type sliding mechanism is provided at the center position of the inner side of the mass ring (6), the plurality of wire rope isolators (4) are evenly distributed between the mass ring (6) and the sleeve-type sliding mechanism and are interconnected with the two, and the sleeve-type sliding mechanism is sleeved on the transmission line and is slidably connected with the transmission line.

2. The reciprocating sliding transmission line tuned mass damper according to claim 1, characterized in that: The number of the wire rope vibration isolators (4) is no less than 4.

3. The reciprocating sliding transmission line tuned mass damper according to claim 1, characterized in that: The sleeve-type sliding mechanism comprises: an inner sleeve (1), an outer sleeve (2) is arranged on the outer side of the inner sleeve (1), two groups of evenly distributed circular notches are opened around the wall of the inner sleeve (1), and two annular track grooves are opened on the inner wall surface of the outer sleeve (2), and the positions of the two annular track grooves respectively correspond to the positions of the two groups of evenly distributed circular notches; sliding balls (3) are placed at the circular notches, and the sliding balls (3) are simultaneously limited and rolled in the circular notches and the corresponding annular track grooves.

4. The reciprocating sliding transmission line tuned mass damper according to claim 3, characterized in that: One side of the spherical surface of the sliding ball (3) is exposed from the circular notch to the inner side of the inner sleeve (1) and is in rolling contact with the power transmission line connected to the inner sleeve (1), and the other side of the spherical surface of the sliding ball (3) is in rolling contact with the annular track groove corresponding to the circular notch, so that the inner sleeve (1) is slidably connected to the power transmission line connected therein through the sliding ball (3).

5. The reciprocating sliding transmission line tuned mass damper according to claim 3, characterized in that: A vibration isolator support (7) is connected and arranged between each wire rope vibration isolator (4) and the outer sleeve (2).

6. The reciprocating sliding transmission line tuned mass damper according to claim 5, characterized in that: The vibration isolator support (7) comprises a top plate and foot plates integrally formed and connected to both sides of the top plate, the foot plates being connected to the outer sleeve (2) by welding, and the top plate being connected to the wire rope vibration isolator (4) by means of bolt connectors (5).

7. The reciprocating sliding transmission line tuned mass damper according to claim 6, characterized in that: The wire rope vibration isolator (4) comprises: an upper clamping plate, a lower clamping plate and a wire rope, the left and right side surfaces of the upper clamping plate and the lower clamping plate are provided with through holes arranged at intervals, the size of the through holes matches the size of the wire rope, the wire rope connects the upper clamping plate and the lower clamping plate through the through holes and is symmetrically arranged on the two clamping plates; the front and rear side surfaces of the upper clamping plate and the lower clamping plate are provided with bolt holes arranged at intervals, and the bolt holes of the upper clamping plate and the lower clamping plate are not connected to their respective through holes; a row of bolt holes is longitudinally provided in the middle of the top plate, and the row of bolt holes is arranged to correspond to and match the bolt holes of the lower clamping plate and are connected through the bolt connector (5).

8. The reciprocating sliding transmission line tuned mass damper according to claim 7, characterized in that: The mass ring (6) is provided with a plurality of groups of connection holes distributed at equal intervals, the number of groups of connection holes being the same as the number of the wire rope vibration isolators (4), and each group of connection holes is connected to a bolt hole of an upper clamping plate in each wire rope vibration isolator (4) via a bolt connector (5).

Images