CN2751294Y

CN2751294Y - Testing machine for testing dancing property of overhead lines

Info

Publication number: CN2751294Y
Application number: CN 200420110381
Authority: CN
Inventors: 黄豪士; 季世泽; 陆盛叶; 黄国飞; 徐睿; 刘斌
Original assignee: Shanghai Electric Cable Research Institute
Current assignee: Shanghai Electric Cable Research Institute
Priority date: 2004-11-26
Filing date: 2004-11-26
Publication date: 2006-01-11
Anticipated expiration: 2014-11-26

Abstract

The utility model relates to a testing machine for testing the dancing property of overhead lines, which belongs to the technical field of the property test of the overhead lines. The utility model is characterized in that a motor output shaft is used for outputting dynamic force, a crank link mechanism is dragged to complete a set of shaft movements of an elliptical movement track, a second crank link mechanism is dragged to rotate in the same direction via a dynamic force transferring system in order to complete the other set of shaft movements of the elliptical movement track and the elliptical movement track is formed by synthesizing and connecting the movements of the two crank link mechanisms. When the relative angles of the two sets of crank link mechanisms are adjusted, the elliptical movement track can be inclined, the testing machine for testing the dancing property of overhead lines uses a mechanical movement method to generate the elliptical movement track and the utility model can be used for simulating the actual operating situation of the overhead lines. Conditions are provided for further researching the performance of the wide cross overhead lines after coated with ice and generating dance, and the utility model is a practical design.

Description

The testing jig ceases to be busy is waved the testing machine of performance

Technical field

The invention belongs to the pole line technical field of performance test.

Background technology

Built on stilts lead, when ground wire moves at circuit, because the influence of external environment, for example wind-force, accumulated snow and icing.Produce vibration owing to wind action makes pole line, when accumulated snow on covering pole line or icing came off, then pole line can cause and waves.Pole line to wave amplitude very big, the track ovalize of its xsect.Conductor can make its disconnected strand, whole wire fracture under serious waving, even the shaft tower of circuit is collapsed.In a word, wave and to cause serious harm to circuit.

For simulating lead when moving under the circuit erected state, lead can stand the ability that how many times waves and a kind of conductor galloping testing machine that designs.The core technology of waving testing machine is a vibrator, the track ovalize of its xsect when vibrator makes conductor galloping, oval major and minor axis may have difference with external environment, be that change and center line major axis also can produce deflection with external force is different, with the angle of coordinate y axle can be from 0 °～90 °.The variation of extraneous environment also makes the frequency change of waving of lead, generally between 1～4Hz.

It is a straight line that the testing machine that is used as conductor vibration so far and waves can only make the xsect track of lead at testing machine exciting place, and promptly lead can only move up and down.For obtaining this movement locus and required frequency, pulling force, its vibrator in the following way: electromagnetism, hydraulic pressure or mechanical mode exciting.

Electromagnetic exciter: enough thrust is arranged, the controlled easy accent of frequency.General frequency easily makes lead be adjusted to starting of oscillation under the required frequency at 20～60Hz, is commonly used for the vibrator that the aeolian vibration testing machine is used.

Hydraulic vibration exciter: enough thrust is arranged, and frequency and amplitude are controlled, are suitable for frequency exciting when on the low side, and processing and manufacturing is difficult, also is commonly used for the vibrator of aeolian vibration testing machine.

Mechanical vibration exciter: simple in structure, enough thrust is arranged, frequency and amplitude are controlled, and general frequency of utilization is low, and as 1～10Hz, the movement locus that can be made into conductive wire cross-section is a straight line, and the plain type that moves up and down is waved the testing machine vibrator.

No matter adopt any in the above-mentioned vibrator, the requirement of the motion ovalize track of its xsect when it all can not satisfy conductor galloping.

Summary of the invention

The utility model be to provide a kind of when satisfying pole line and waving a kind of testing jig ceases to be busy of the motion ovalize track of its xsect wave the testing machine of performance.

Technical scheme that the utility model is taked is:

For the xsect that makes pole line is oval orbiting motion, its vibrator push rod of waving testing machine just should be elliptical trajectory.Therefore elliptical trajectory is synthesized into by tangential movement and vertical movement track, waves testing machine and should have and make the vibrator push rod do the mechanism of level and vertical movement.

With a power output shaft, respectively with a rotating shaft that has a crank connecting link and four-bar mechanism advance the shaft gear engagement, the shaft gear engagement that goes out shaft gear and another crank connecting link of this four-bar mechanism, the circle wheel that connects this crank connecting link be placed in can left and right mobile base on, base and first toggle movably active connection of composition.

Crank connecting link is by being made up of a fixedly slide block that can move thereon on the chute at rotatable round wheel center, have on the slide block one can active connection connecting rod fulcrum.

A kind of four-bar mechanism be adopt be equipped with rotatable, and the cross bar of three gears of straight line engagement successively, its two ends are connected with two rotating shafts respectively, meshed gears all is equipped with in two rotating shafts respectively.

But another kind of four-bar mechanism is the rhombus framework that is connected into the angle random variation by four bars, at four jiaos rotating shaft is installed, and rotating shaft is equipped with respectively by the odontoid belt envelope and is being wrapped up in four rotatable gears.

The third method be the first cover crank linkage assembly by cone gear and spline transferring power, and make second to overlap the crank linkage assembly and be in horizontal direction side-to-side movement on the pedestal that ball bearing is arranged.

Implement to drag a cover crank linkage assembly by a motor shaft behind the utility model, and remove to drive another set of toggle by the four-bar mechanism transferring power and make equidirectional circular motion, again the movement locus of two toggles is combined by connecting rod, obtained the mechanical motion elliptical trajectory.

Description of drawings

Fig. 1 is the structural representation of the present utility model behind the omission power-transmission system.

Fig. 2 is for the utility model medium power transmission system concerns synoptic diagram.

Fig. 3 is used for a kind of power-transmission system of the present utility model, a kind of four-bar mechanism.

Fig. 4 is used for second kind of power-transmission system of the present utility model, another kind of four-bar mechanism.

Fig. 5 is used for the third power-transmission system of the present utility model.

Embodiment

Now the utility model is described in further detail in conjunction with the accompanying drawings.

Motor M output shaft 1, the shaft gear 3 that advances with rotating shaft 2 that has crank connecting link B and four-bar mechanism C meshes respectively, the shaft gear 4 that goes out of four-bar mechanism C meshes with the rotating shaft 5 of crank connecting link A, the circle wheel of crank connecting link A be placed in can left and right mobile base D on, the connecting rod B9 of base D and crank connecting link B is active to be connected in 6.

Crank connecting link A is by on the chute A7 by rotatable circle wheel a center a fixedly slide block A8 that can move being arranged thereon, the fulcrum A10 of an active connection connecting rod A9 being arranged on the slide block.

Crank connecting link B is by on the chute B7 by rotatable circle wheel b center a fixedly slide block B 8 that can move being arranged thereon, the fulcrum B10 of an active connecting rod B9 being arranged on the slide block.

Three kinds of power-transmission systems can be arranged:

First kind of power-transmission system is:

Four-bar mechanism C is equipped with rotatable and the cross bar 17 of three

gears

12,13,14 of straight line engagement successively, and two ends are connected with bar 16, bar 18 rotating shafts respectively, bar 16 be equipped with rotatable and with gear 12 meshed gears 11; Bar 18 be equipped with rotatable and with gear 14 meshed gears 15.

Second kind of power-transmission system is:

Four-bar mechanism C is by four connecting

rods

19,20,21, but 22 connects into the rhombus framework of angle random variation, in four jiaos of rotating shafts,

swing pinion

23,24,25,26 transferring power that odontoid belt 27 envelopes that are closed are wrapped up in is housed respectively.

The shaft gear 3 that advances of four-bar mechanism C is gears 11, or gear 23, and going out shaft gear 4 is gear 15 or gear 25.

The third power-transmission system is:

Rotating shaft 2 is connected with bevel gear 26 on it, and 26,27 engagements of two bevel gears, is connected in the spline 28 and bevel gear 29 engagements of bevel gear 27, is installed in two bevel gears, 29,30 engagements on the base D, and bevel gear 30 is connected with the rotating shaft 5 of crank connecting link A.

Regulate two slide blocks and can change elliptical shape and oval angle, concrete way is:

Distance when center and the runner a center 01 of adjusting slider A8 just can change the transverse a size of final formation; Distance when center and the runner b center 02 of adjusting slider B8 just can change the ellipse short shaft b size of final formation; Elliptical orbit can form the ellipse that major and minor axis has any ratio because of its long and short adjusting: when minor axis length was zero, ellipse had only long axis direction, promptly waves the machine push rod and moves up and down; When long axis length was zero, ellipse had only short-axis direction, promptly waves the machine push rod and does side-to-side movement; When long and short axle was isometric, oval track was rounded; Different long and short axis scale makes elliptical orbit be fat or thin branch.

The chute A7 of runner a, the center line of the chute B7 of center line and runner b is 90 ° of layouts, when regulating one of them position of center line, the angle that makes two center lines is between 0 °～90 ° the time, the formed elliptical orbit of mechanism then, its a will be not orthogonal with the center line of tested pole line, and form one 0 °～90 ° angle, promptly form an oblique elliptical path.

Claims

1, a kind of testing jig ceases to be busy is waved the testing machine of performance, comprise motor, kinematic train and toggle, it is characterized in that: have only a power output shaft (1), the shaft gear (3) that advances with rotating shaft that has crank connecting link (B) (2) and four-bar mechanism (C) is connected respectively, and the shaft gear (4) that goes out of four-bar mechanism (C) meshes with the rotating shaft (5) of crank connecting link (A); The circle wheel of crank connecting link (A), but be placed on the base (D) of move left and right active being connected in of connecting rod (B9) (6) of base (D) and crank connecting link (B);

2, the testing machine of waving according to claim 1, it is characterized in that: described crank connecting link (A) is by on the chute (A7) by rotatable circle wheel (a) center a fixedly slide block (A8) that can move being arranged thereon, the fulcrum (A10) of an active connection connecting rod (A9) being arranged on the slide block.

3, the testing machine of waving according to claim 1, it is characterized in that: described crank connecting link (B) is by on the chute (B7) by rotatable circle wheel (b) center a fixedly slide block (B8) that can move being arranged thereon, the fulcrum (B10) of an active connection connecting rod (B9) being arranged on the slide block.

4, the testing machine of waving according to claim 1, it is characterized in that: described four-bar mechanism (C) is to be equipped with rotatable and straight line meshed gears (12) successively, (13), (14) cross bar (17) two ends respectively with bar (16), bar (18) rotating shaft connects, bar (16) be equipped with rotatable and with gear (12) meshed gears (11), bar (18) be equipped with rotatable and with gear (14) meshed gears (15).

5, the testing machine of waving according to claim 1, it is characterized in that: described four-bar mechanism (C) is by four bars (19), (20), (21), (22) but connect into the rhombus framework of angle random variation, the swing pinion of being wrapped up in by odontoid belt (27) envelope (23) is housed, (24) respectively in four jiaos of rotating shafts, (25), (26).

6, the testing machine of waving according to claim 1 is characterized in that: the shaft gear (3) that advances of described four-bar mechanism (C) is gear (11), or gear (23), and described to go out shaft gear (4) be gear (15) or gear (25).

7, mechanism according to claim 1, it is characterized in that: described rotating shaft (2), it is connected with bevel gear (26) on it, and two bevel gears (26) (27) engagement, be connected in the spline (28) of bevel gear (27),, be installed in two bevel gears (29) on the base (D) with bevel gear (29) engagement, (30) engagement, bevel gear (30) is connected with the rotating shaft (5) of crank connecting link (A).