CN119858484B - An integral wrist arm with adjustable damping and adjustment method thereof - Google Patents
An integral wrist arm with adjustable damping and adjustment method thereofInfo
- Publication number
- CN119858484B CN119858484B CN202510356741.1A CN202510356741A CN119858484B CN 119858484 B CN119858484 B CN 119858484B CN 202510356741 A CN202510356741 A CN 202510356741A CN 119858484 B CN119858484 B CN 119858484B
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- CN
- China
- Prior art keywords
- damping
- cantilever
- arm
- frame
- integral
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
- B60M1/234—Arrangements for supporting or suspending trolley wires, e.g. from buildings incorporating yielding means or damping means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The application relates to the field of wrist arms, in particular to an integral wrist arm with adjustable damping and an adjusting method, which comprises a wrist arm frame, wherein a rotating structure and the wrist arm damping are arranged on the wrist arm frame, the rotating structure is used for enabling the cantilever frame to rotate relative to the tower and the rotating shaft extends along the horizontal direction, and the cantilever damping is used for applying resistance to the rotation of the cantilever frame. The application has the effect of reducing the amplitude of the overhead line system under the condition of controllable cost, thereby reducing the off-line rate and creating space for the speed increase of the train.
Description
Technical Field
The application relates to the field of wrist arms, in particular to an integral wrist arm with adjustable damping.
Background
The high-speed train can greatly shorten the space-time distance between cities, promote regional economy integration, and have multiple strategic significance on economy, society, science and technology and environmental protection, so that the high-speed train is actively researched and developed and the speed is pursued in all countries.
The overhead contact system is a key device for providing continuous electric energy for a train in an electrified railway, and the electric energy is transmitted to a vehicle from the overhead contact system through sliding contact with a pantograph of the train. The wave speed of the overhead contact system is a key parameter of overhead contact system design, and the highest speed of the train is directly determined.
The standard deviation of the contact force refers to the deviation between the contact force between the pantograph and the catenary and the average value thereof, when the wave speed ratio exceeds 0.7, the frequencies of the interactive excitation wave of the pantograph and the forward wave are similar, the same-frequency resonance occurs in the two types of wave vibration, the fluctuation energy is gathered at the contact point, the catenary is greatly rocked, and the standard deviation of the contact force is greatly increased.
Therefore, when the wave speed ratio exceeds 0.7, the current receiving quality is rapidly deteriorated, that is, the pantograph is frequently separated from the overhead contact line, and the train cannot accelerate finally. Although the replacement of contact wire rods of the contact net can improve the tension, reduce the linear density, improve the wave speed, reduce the wave speed ratio and reduce the amplitude of the contact net, the risk of wire breakage is high and the cost is uncontrollable.
Disclosure of Invention
In order to reduce the amplitude of the overhead line system under the condition of controllable cost, the application provides an integral cantilever with adjustable damping and an adjusting method.
In a first aspect, the integral cantilever with adjustable damping provided by the application adopts the following technical scheme:
The utility model provides a from whole cantilever of taking adjustable damping, includes the cantilever frame, be provided with revolution mechanic and cantilever damping on the cantilever frame, revolution mechanic is used for making the cantilever frame rotate and the rotation axis extends along the horizontal direction relative shaft tower, the cantilever damping is used for exerting the resistance to cantilever frame rotation.
Through adopting above-mentioned technical scheme, install the cantilever frame through rotating the mode of connection on the shaft tower through rotating the structure after, because the rotation axis of cantilever frame extends the direction along the horizontal direction, when the contact net receives the reciprocal excitation wave of bow net, wave vibration such as preceding travelling wave even the windblow to lead to the contact net to produce and rock from top to bottom, the cantilever frame can take place to rotate by a small margin, has effectively reduced because of the contact net vibration causes the condition of mechanical damage to the cantilever frame to appear. And the cantilever frame is applied with force through cantilever damping, so that the frequency of the bow net interaction excitation wave and the vibration frequency of the overhead net can be changed, the amplitude of the overhead net is improved, and the off-net rate is reduced. Compared with the wire rod for replacing the contact line, the wrist arm disclosed by the application creates a space for accelerating the train under the condition of controllable cost.
Compared with the arrangement of the related damping structure on the pantograph, the off-grid rate can be reduced, but the arrangement can only inhibit the generation of the interaction excitation wave of the pantograph and the net. Besides the bow net interaction excitation wave generated on the contact net when the pantograph contacts with the contact net, wave vibration such as a forward traveling wave is formed on the contact net, and the contact net is also affected by external factors such as wind blowing to vibrate, so that the problem of integral vibration of the contact net cannot be solved by adding damping on the pantograph. The cantilever frame rotates, and the cantilever damping is matched for inhibition, so that the vibration condition of the whole catenary system can be improved, and particularly, the inhibition of the amplitude is improved.
Optionally, the rotating structure comprises a rotating hole formed on the cantilever frame, and an axis of the rotating hole extends along a horizontal direction.
By adopting the technical scheme, when the wrist arm is installed, the wrist arm and the tower can be connected by installing the pin shaft in the rotating hole and installing the pin shaft on the tower. The structure is simple, and the integral structure arrangement is easy to realize by the wrist arm.
Optionally, the end part of the cantilever frame is used for being connected with the tower, the end part of the cantilever frame used for being connected with the tower comprises an upper connecting end and a lower connecting end, the upper connecting end is positioned on the upper side of the lower connecting end, and the cantilever damping is telescopic damping;
The rotating structure is arranged on the lower connecting end, the cantilever damper is arranged on the upper connecting end, or
The rotating structure is arranged on the upper connecting end, and the cantilever damping is arranged on the lower connecting end.
By adopting the technical scheme, if the cantilever frame is integrally rotatably arranged on the tower, and the rotation resistance is applied to the cantilever through the cantilever damping, the cantilever damping is equal to the rotation damping. At the moment, the direction of damping force applied by the cantilever damping is consistent with the rotation direction of the cantilever frame, the cantilever weight and the weight of the contact net are applied to the cantilever damping, namely the damping force is required to directly counter the weight, the requirement on the cantilever damping is high, and the reliability is low.
Compared with the whole rotation setting of cantilever frame on the shaft tower, through setting up rotating-structure on last link or lower link, correspond with cantilever damping dress on lower link or upper link, and set up the cantilever damping as flexible damping, flexible damping can carry out the bearing through self mechanical structure, and need not to go directly counter gravity through damping force, and rotating-structure can share little weight equally, and the reliability promotes greatly.
The main function of the cantilever is to mount the contact net, the carrier cable in the contact net is positioned on the upper side of the cantilever, and the carrier cable is supported by the cantilever. The contact line is hung on the lower side of the carrier cable, namely the whole weight of the contact line is mainly applied to the upper end of the cantilever, and when the contact line vibrates in a wave mode, the influence on the upper end of the cantilever is larger. When the cantilever frame rotates, the contact net applies tension or pressure to the cantilever damping, compared with the rotating structure arranged on the upper connecting end, the cantilever damping is arranged on the lower connecting end, and the rotating structure is arranged on the lower connecting end, so that the cantilever damping is arranged on the upper connecting end, namely, the position of the cantilever damping is closer to the upper end of the cantilever for bearing force, and the telescopic response is made to wave vibration, so that the wave vibration eliminating effect is better.
Compared with the method that the cantilever damping is directly arranged on the carrier cable for connecting and contacting, the carrier cable is connected with the contact line, and the voltage on the carrier cable is also very high, so that the cantilever damping is in a high-voltage environment due to the arrangement of the cantilever damping device, which not only causes the structural complexity of the cantilever damping device, but also causes the cantilever damping device to be in a high-voltage environment. The cantilever damping device is arranged at the joint of the cantilever frame and the tower, is directly connected with the tower and is separated from the carrier cable, and the insulating cantilever frame is arranged between the cantilever frame and the tower, can be directly grounded through the tower, has high safety and is beneficial to maintenance, replacement and installation.
Optionally, the cantilever damping is an adjustable damping.
By adopting the technical scheme, the cantilever damping is set to be adjustable damping, and the damping coefficient is correspondingly adjusted according to the highest speed limit of the train on the line, so that the wave vibration suppression effect and the cantilever protection effect are optimized. For the cantilever at the area with the definite interval vehicle speed limit, the damping coefficient is adjusted in a targeted manner so as to maximize the wave vibration suppression effect and the cantilever protection effect.
Optionally, the wrist arm support further comprises a positioner which is connected with the contact line, one end of the positioner is rotatably arranged on the wrist arm frame, positioning damping is arranged on the positioner, and the positioning damping is used for applying resistance to rotation of the positioner.
Through adopting above-mentioned technical scheme, through setting up the location damping on the locator to apply damping force to the locator when the contact line takes place the vibration and drives the rotation of locator, and then restrain the amplitude. Therefore, the contact line and the pantograph can be attached as much as possible, and the off-grid rate is reduced.
Optionally, the positioning damper is an adjustable damper.
By adopting the technical scheme, the positioning damping is the adjustable damping, the cantilever damping is matched with the damping coefficient according to the highest speed limit of the train on the line, the cantilever at the area with definite interval speed limit is matched with the damping coefficient according to the interval speed limit, and the wave vibration suppression effect and the cantilever protection effect are optimized.
In a second aspect, the adjusting method of the integral cantilever with the adjustable damping provided by the application adopts the following technical scheme:
the adjusting method of the integral cantilever with the adjustable damping is applied to the integral cantilever with the adjustable damping, the damping coefficient of the cantilever damping in the section of the line is adjusted according to the highest speed limit of the train in the running line, and the higher the highest speed limit of the train in the running line is, the larger the damping coefficient of the cantilever damping with the largest damping coefficient in the section of the line is.
By adopting the technical scheme, the damping coefficient of the cantilever damping with the best effect of suppressing the wave vibration on the contact network is obtained in advance in different vehicle speeds in an experimental mode, and the higher the vehicle speed is, the larger the damping coefficient of the cantilever damping with the best effect of suppressing the wave vibration on the contact network is. For example, after the adjustment according to the method, the damping coefficient of the cantilever damping with the largest damping coefficient in the line with the speed limit of 400km/h is A, and the damping coefficient of the cantilever damping with the largest damping coefficient in the line with the speed limit of 350km/h is B, wherein A is larger than B.
When the cantilever damping is installed and adjusted, the damping coefficient of the cantilever damping is adjusted in a matching way according to the highest speed limit in the train running line. Compared with the cantilever damping with the same damping coefficient arranged in each different highest speed limit line, the cantilever damping device can optimize the wave vibration inhibition effect, reduce the off-grid rate and reduce the damage to the contact network system and the cantilever.
Optionally, the damping coefficient of the cantilever damping in different speed ranges is adjusted according to the different speed ranges of the train in the section of line, and the higher the speed limit of the speed range is, the greater the damping coefficient of the cantilever damping in the section of speed range is.
By adopting the technical scheme, the damping coefficient setting of the cantilever damping is further refined, the cantilever damping matched with the corresponding damping coefficient is used for defining the interval of the vehicle speed, wave vibration is inhibited in a targeted manner, and the protection effect on the contact network system is maximized. For example, a plurality of clear speed-limiting vehicle speed sections exist in a line with the speed limit of 350km/h, the speed limit of the vehicle speed section A is 200km/h, the speed limit of the vehicle speed section B is 300km/h, the speed limit of the vehicle speed section C is 350km/h, and after the speed is regulated according to the method, the damping coefficient relative magnitude of the cantilever damping in the A, B, C vehicle speed sections is that the damping coefficient of the cantilever damping in the vehicle speed section A is less than the damping coefficient of the cantilever damping in the vehicle speed section B is less than the damping coefficient of the cantilever damping in the vehicle speed section C.
In summary, the present application includes at least one of the following beneficial technical effects:
The wave vibration on the whole contact network can be inhibited, the off-network rate of the pantograph is reduced, a space is created for further speeding up the train, the wrist arm can be protected, and the occurrence of mechanical damage to the wrist arm caused by the wave vibration is effectively reduced;
the rotating mechanism is arranged at the lower connecting end, and the cantilever damping is arranged at the upper connecting end, so that the cantilever damping has better bearing effect, and the response feedback to the wave vibration is better, namely the suppression and elimination effect to the wave vibration is better, and the cantilever damping is also beneficial to overhauling, replacing and installing;
Damping coefficients adjustable are selected for wrist damping and positioning damping, so that matching can be performed better according to speed limit, damping coefficients can be configured in a targeted mode, and eliminating and inhibiting effects on wave vibration can be maximized.
Drawings
Fig. 1 is a schematic structural view (positive positioning) of an embodiment of the present application.
Fig. 2 is a schematic diagram of the structure of an embodiment of the present application (reverse orientation).
FIG. 3 is a schematic view of the structure (in position) of an embodiment of the present application after it has been installed on a tower.
Fig. 4 is an enlarged schematic view at a in fig. 1.
Reference numerals illustrate:
1. The wrist arm comprises a wrist arm frame, an upper connecting end, a lower connecting end, a rotating structure, 131, a rotating hole, 14, wrist arm damping, 2, a positioner, 21, positioning damping, 3, a positioning column and 4, and a carrier cable seat.
Detailed Description
The application is described in further detail below with reference to fig. 1-4.
Examples
The embodiment 1 of the application discloses an integral cantilever with adjustable damping. Referring to fig. 1 and 2, the integral cantilever with adjustable damping comprises a cantilever frame 1, a positioner 2 for connecting with a contact line, and a positioning column 3 for connecting the cantilever frame 1 and the positioner 2.
Referring to fig. 1 and 2, one end of the positioning column 3 is fixed to the underside of the cantilever frame 1, and the other end of the positioning column 3 extends downward in the vertical direction. One end of the positioner 2 is rotatably arranged on the positioning column 3, the other end of the positioning column 3 is used for being connected with a contact line, and a rotating shaft of the positioner 2 extends along the horizontal direction. The connection part of the positioning column 3 and the positioner 2 is provided with positioning damping 21, the positioning damping 21 can adopt friction damping, hydraulic damping, magnetic attraction damping and the like, the damping coefficient is adjustable, and the positioning damping 21 is preferably magnetic attraction damping in the embodiment of the application.
Referring to fig. 1 and 2, a carrier cable seat 4 is fixed on the upper side of the cantilever frame 1, that is, the carrier cable seat 4 is located on a horizontal beam of the cantilever frame 1, and the carrier cable seat 4 is used for installing and supporting a carrier cable.
Referring to fig. 1 and 3, the end of the cantilever frame 1 is for connection with a tower, and the end of the cantilever frame 1 for connection with a tower includes an upper connection end 11 and a lower connection end 12. The upper connection end 11 is located at the upper side of the lower connection end 12, and the upper connection end 11 is the end of the horizontal beam for connection with the tower.
Referring to fig. 3 and 4, the cantilever frame 1 is provided with a rotation structure 13 and a cantilever damper 14, in which the rotation structure 13 is a rotation hole 131 formed on the lower connection end 12, and the axis of the rotation hole 131 extends in the horizontal direction, so that the cantilever frame 1 can rotate around the axis of the rotation hole 131 by inserting a pin into a tower and rotating. In other embodiments, the rotation structure 13 may be a rotation shaft directly fixed to the upper connection end 11, or any other structure that can rotate the cantilever frame 1 relative to the tower and extend the rotation shaft in the horizontal direction.
Referring to fig. 3 and 4, the cantilever damper 14 is used for applying resistance to rotation of the cantilever frame 1, in this embodiment, the cantilever damper 14 is telescopic, one end of the cantilever damper 14 is used for being fixed on a tower, the other end of the cantilever damper 14 is fixed on the upper connecting end 11, and the cantilever damper 14 stretches along the extending direction of the horizontal beam of the cantilever frame 1. The cantilever damping 14 can adopt friction damping, hydraulic damping, magnetic absorption damping and the like, and can be any adjustable damping with adjustable damping coefficient.
In other embodiments, the wrist damper 14 may also be mounted on the lower link 12 and the rotating structure 13 disposed on the upper link 11. The rotation structure 13 can also be arranged on the upper connecting end 11 and the lower connecting end 12, and the wrist arm damping 14 is changed into rotation damping.
The embodiment 1 of the application has the implementation principle that after wave vibration occurs on a contact network due to contact with a pantograph or wind blowing and the like, on one hand, the positioner 2 rotates, and the positioning damping 21 applies damping force to the positioner 2, so that the amplitude of a contact line is reduced, and the off-line rate of the pantograph is reduced as much as possible. On the other hand, the cantilever frame 1 rotates slightly to eliminate the mechanical damage of the cantilever frame 1 as much as possible, the cantilever damping 14 applies a damping force to the rotation of the cantilever frame 1 under tensile force or pressure force to reduce the amplitude of the carrier cable as much as possible, thereby reducing the amplitude of the contact line. The cantilever disclosed by the application is arranged in the whole line, so that the wave vibration of the whole contact net system can be restrained, the damping coefficients of the cantilever damping 14 and the positioning damping 21 are adjusted to adapt to the vehicle speed of the installed area, and the restraining and eliminating effects of the wave vibration of the contact net system can be maximized. By applying the wrist arm disclosed by the application, the net-separating rate of the pantograph under the condition of high speed can be greatly reduced under the condition of not replacing the contact wire rod, and a space is created for further improving the speed of the train.
Examples
The embodiment 2 of the application discloses an adjusting method of an integral wrist. The adjusting method of the integral wrist arm is as follows:
And adjusting the damping coefficient of the cantilever damping and the positioning damping in the section of the line according to the highest speed limit of the train in the running line, wherein the higher the highest speed limit of the train in the running line is, the larger the damping coefficient of the cantilever damping and the positioning damping with the largest damping coefficient in the section of the line is. According to the train in the section of the line, the damping coefficients of the cantilever damping and the positioning damping in different speed sections are adjusted, and the higher the speed limit of the speed section is, the greater the damping coefficients of the cantilever damping and the positioning damping in the section of the line are.
The implementation principle of the embodiment 2 of the application is that when the cantilever is installed, cantilever damping and positioning damping with damping coefficients matched with the current position speed limit are selected through the scheme, or the damping coefficients of the cantilever damping and the positioning damping are adjusted to be matched with the current position speed limit, so that the wave vibration suppression effect on a contact network system can be maximized, and the protection effect on the contact network is maximized.
The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510356741.1A CN119858484B (en) | 2025-03-25 | 2025-03-25 | An integral wrist arm with adjustable damping and adjustment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510356741.1A CN119858484B (en) | 2025-03-25 | 2025-03-25 | An integral wrist arm with adjustable damping and adjustment method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119858484A CN119858484A (en) | 2025-04-22 |
| CN119858484B true CN119858484B (en) | 2025-07-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510356741.1A Active CN119858484B (en) | 2025-03-25 | 2025-03-25 | An integral wrist arm with adjustable damping and adjustment method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119858484B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN220535470U (en) * | 2023-07-12 | 2024-02-27 | 河北飞鸣轨道交通器材有限公司 | High-speed railway contact net anti-positioning elastic damper supporting mechanism |
| CN222262102U (en) * | 2024-04-30 | 2024-12-27 | 青岛科而泰环境控制技术有限公司 | Wind-resistant support for contact net |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200357138Y1 (en) * | 2004-05-06 | 2004-07-21 | 한국전기철도기술 주식회사 | Movable bracket for a electric railway |
| CN220518040U (en) * | 2023-07-12 | 2024-02-23 | 河北飞鸣轨道交通器材有限公司 | Integral type positive location supports hangs cantilever device |
-
2025
- 2025-03-25 CN CN202510356741.1A patent/CN119858484B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN220535470U (en) * | 2023-07-12 | 2024-02-27 | 河北飞鸣轨道交通器材有限公司 | High-speed railway contact net anti-positioning elastic damper supporting mechanism |
| CN222262102U (en) * | 2024-04-30 | 2024-12-27 | 青岛科而泰环境控制技术有限公司 | Wind-resistant support for contact net |
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| CN119858484A (en) | 2025-04-22 |
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