CN113581025A

CN113581025A - Swing arm type contact net system for rail vehicle test bed

Info

Publication number: CN113581025A
Application number: CN202110882195.7A
Authority: CN
Inventors: 李忞; 王大鹏; 石巍; 倪忠强; 王铁钧; 孙珂; 张文亨
Original assignee: CRRC Dalian Co Ltd
Current assignee: CRRC Dalian Co Ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-11-02
Anticipated expiration: 2041-08-02
Also published as: CN113581025B

Abstract

The swing arm type contact net system for the rail vehicle test bed comprises a driving box, a supporting upright post, a swing arm and a transmission shaft, wherein the driving box is fixed on the supporting upright post, one end of the transmission shaft is vertically embedded into the driving box, the other end of the transmission shaft vertically penetrates through the swing arm, the transmission shaft is driven to deflect through a motor in the driving box, and the swing arm is further driven to swing. According to the swing arm type contact net system provided by the invention, an active movable contact net is connected with a pantograph of a train on a rail vehicle test bed, and the connection points of the contact net and the pantograph are switched in a reciprocating swing mode in a continuous sliding manner, so that the potential safety hazard caused by local heating and too high local temperature rise due to the fact that the current is not limited by the train power and the contact point is not changed for a long time is further solved.

Description

Swing arm type contact net system for rail vehicle test bed

Technical Field

The invention belongs to the field of rail vehicle tests and tests, and particularly relates to a swing arm type contact network system for a rail vehicle test bed.

Background

With the development of the high-power rolling test bed technology, the full-load traction test of the electric locomotive in a laboratory becomes possible. In order to enable the tested vehicle to approach the actual operation working condition as much as possible, a contact network is needed to supply power to the electric locomotive. In view of the relative lack of indoor space and safety concerns, a mobile catenary is generally selected that can be deployed when in use and stowed when not in use. For example, as shown in FIG. 1 (patent application No. CN202030120741. X). The power supply body and the conductive bar for taking power from the pantograph are connected to the swing arm through a plurality of insulators, and the power supply cable is connected with the conductive bar on the swing arm through a conductive connector, so that the swing arm can freely rotate in the horizontal direction. When the movable contact net works, the swing arm swings out to the position (parallel to the paper surface) shown in figure 1, and then the movable contact net is electrified to operate; after the mobile contact net finishes running, the power supply is stopped firstly, and then the swing arm rotates to the folding position vertical to the paper surface. However, such overhead contact systems cannot move during operation, so that the positions of the contact points of the pantograph are always unchanged, and the cables at the contact points are easily melted by overheating.

Disclosure of Invention

In order to solve the problems, the invention provides a swing arm type contact net system for a rail vehicle test bed, which comprises a driving box, a supporting upright post, a swing arm and a transmission shaft, wherein the driving box is fixed on the supporting upright post, one end of the transmission shaft is vertically embedded into the driving box, the other end of the transmission shaft vertically penetrates through the swing arm, the transmission shaft is driven to deflect by a motor in the driving box, and the swing arm is further driven to swing.

In some embodiments of the invention, the swing arm type contact net system further comprises a conductive bar, and two ends of the rod-shaped first part at the upper part of the conductive bar are fixed on one side of the swing arm in a manner that the insulator is parallel to the swing arm.

In some embodiments of the invention, the conductive bar further comprises a rod-like second member perpendicular to the first member and fixed under an end of the tip of the first member.

In some embodiments of the invention, the conductive bar further comprises a third member having a rod shape, one end of the third member being fixed to the bottom end of the second member and the other end being connected to the lower side of the first member.

In some embodiments of the invention, a conductive strip is further connected to the lower portion of the second part of the conductive bar, and the other end of the conductive strip is connected to a contact net.

In some embodiments of the invention, a movable line clip is also connected to the lower end of the second part of the conductive bar, said movable line clip securing the overhead line system.

In some embodiments of the present invention, the swing arm type catenary system further comprises a fixing block, wherein the fixing block is fixed on the support column and connected with the end of the transmission shaft penetrating through the swing arm.

In some embodiments of the present invention, the swing arm type catenary system further includes a distance sensor fixed on the fixed block for monitoring a motion track of the swing arm.

In some embodiments of the invention, the swing arm type catenary system further comprises a stop fixed between the distance sensor and the swing arm to prevent the swing arm from swinging excessively.

In some embodiments of the present invention, the swing arm type catenary system further includes a limit lock located on an outer sidewall of the fixed block for limiting the swing arm from swinging in an idle state.

According to the swing arm type contact net system provided by the invention, the active movable contact net is connected with the pantograph of the train on the rail vehicle test bed, and the connection points of the contact net and the pantograph are continuously switched in a reciprocating swing mode, so that the problem that the contact net lead is burnt due to overheating generated when the contact net is fixedly connected can be prevented, meanwhile, the connection area of the pantograph can be changed in a small range while the contact net swings, and other problems caused by local overcurrent or overheating of the pantograph can be prevented.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.

FIG. 1 is a diagram of a conventional prior art design structure;

FIG. 2 is a schematic diagram of the design of the swing arm type touch screen system of the present invention;

fig. 3 is a horizontal front view of a swing arm type catenary of an embodiment of the present invention;

fig. 4 is a horizontal side view of a swing arm type catenary of an embodiment of the present invention;

fig. 5 is a top view of a swing arm type overhead line system in the vertical direction according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.

Fig. 2 is a schematic diagram of the present invention, and in fig. 2, a structure in a shape like a knife is a simplified model of a swing arm type overhead line system designed by the present invention, and the diagram shows schematic diagrams of a use state and an idle state thereof. Specifically, in the idle state, the swing arm type contact net is located at a point C in the figure, and the swing arm type contact net is folded to a position close to the fixed object. And the point AB is a reciprocating motion interval of the swing arm type contact net in the use state, namely reciprocating motion from A-B. I represents the fan-shaped region of swing arm motion of swing arm formula contact net, d represents the displacement distance of the wire of swing arm formula contact net (promptly contact net), through the reciprocating motion of swing arm formula contact net between AB (being equivalent to at rail train's line of traveling), make the contact net can have the displacement that the distance is d in the direction of perpendicular to rail train, can realize carrying out the traction test of full load in the room when, the contact net can produce relative movement with the pantograph of test vehicle always, with the connected mode of contact net and pantograph under the simulation real train operational environment, and avoid the wire on the contact net because of the high position that produces through the fixed point and the contact of pantograph for a long time makes the contact net burn out the problem. The relative motion scene that the vehicle is still and the contact net is movable is realized.

As shown in fig. 3-5, the present invention provides a swing arm type contact net system for a rail vehicle test bed, which includes a driving box 6, a supporting column 10, a swing arm 9, and a transmission shaft 8, wherein the driving box 6 is fixed on the supporting column 10, one end of the transmission shaft 8 is vertically embedded in the driving box 6, and the other end of the transmission shaft vertically passes through the swing arm 9, and the transmission shaft 8 is driven by a motor in the driving box 6 to deflect, and further drives the swing arm 9 to swing.

In this embodiment, in the real environment of the operation of the off-site train, the pantograph of the overhead contact system is always in a relative movement state, so that the generated high-intensity current is uniformly distributed on the wire of the overhead contact system at the contact point between the overhead contact system and the pantograph along the train, and the high-intensity current cannot continuously pass through a certain point, so that high temperature cannot be generated at a certain section or a certain point of the overhead contact system due to the super-strong current. However, on indoor rolling test platform, the train is in the in-situ motion and travels, pantograph and contact net can not produce the displacement, consequently can lead to the electric current of single contact point to generate heat and burn out the contact net or reduce contact net life, in this embodiment for this reason, motor drive transmission shaft 8 through in the drive box 6 takes place reciprocal deflection motion, and make the contact net that the swing arm 9 outside was connected continuously produce the displacement through the swing arm 9 on the transmission shaft and realize the effect with the contact point reciprocating change of pantograph, make the super high current that the power supply produced can not always produce the high temperature at the fixed connection point on the contact net, and prevent that the high temperature from burning out the contact net.

In some embodiments of the present invention, the swing arm type catenary system further comprises a conductive bar 2, and two ends of the rod-shaped first member 12 at the upper part of the conductive bar 2 are fixed on one side of the swing arm 9 in a manner that the insulator 3 is parallel to the swing arm 9.

In this embodiment, on the preparation material of actual swing arm formula contact net, require to have certain intensity, consequently adopt metal preparation usually to form, maximize reduce cost on the basis of satisfying the intensity requirement. Therefore, in the swing arm type catenary of the metal structure, the wire for supplying the high voltage power and the swing arm 9 need to be insulated, and therefore, the conductive bar 2 and the swing arm 9 are connected through the insulator 3. In order to consider the weight of the contact net and the requirement of certain pressure to be connected with the pantograph. As shown in fig. 3-5, one section of the conductive bar 2 is designed into a triangular structure, and at the top of the conductive bar is a first part 12, and two sections of the first part 12 are respectively connected with the swing arm 9 through the insulator 3.

In some embodiments of the invention, the conductive bar 2 further comprises a second rod-shaped part 13, said second part 13 being perpendicular to said first part 12 and fixed under the end of the tip of said first part 12.

In the present embodiment, a second member 13 is further connected to an end of the first end of the conductive bar 2 away from the support pillar 10, and the second member 13 is fixed to the end of the first member 12 perpendicular to the first member 12.

In some embodiments of the invention, the bar 2 further comprises a third member 14 in the form of a rod, said third member 14 being fixed at one end to the bottom end of the second member 13 and at the other end being connected to the underside of said first member 12.

In the present embodiment, in order to take into account the deformation influence of the pressure generated when the catenary contacts the pantograph on the busbar, a third member 14 is further disposed between the first member 12 and the second member 13, and one end of the third member 14 is connected to the lower end of the second member 13. The opposite end is connected to a position on the first part 12 and the point of connection to the first part 12 is at a distance from the point of connection of the first part 12 to the second part 13 equal to the total length of the second part 12, i.e. a portion of the first part 12 forms a right isosceles triangle with the second part 13 and the third part 14.

In some embodiments of the present invention, a conductive strip 1 is further connected to the lower portion of the second part 13 of the conductive bar, and the other end of the conductive strip 1 is connected to a contact net.

In the present embodiment, as shown in fig. 3 to 4, a protrusion with a certain length extends outwards from a lower portion of the second end portion of the conductive bar 2, which is downward and vertical, near the end position, the protrusion is connected with the conductive tape 1, the conductive tape 1 has good conductive performance, and the other end of the conductive tape 1 is connected with the contact net 11 to supply power to the contact net 11.

In some embodiments of the invention, the lower end of the second part of the conductive bar is further connected with a movable wire clip, which fastens the overhead line system.

In this embodiment, the lower end of the second component 13 is connected to a movable line clip 4, the movable line clip 4 has a certain rigidity, and is connected to and locked with a catenary 11 through a connection structure matched with the catenary 1, and the movable line clip 4 enables the catenary 11 to rotate in the horizontal direction relative to a swing arm, and enables the catenary and a pantograph to be always in a vertical state from a top view, i.e., the catenary is always parallel to the traveling direction of the train, it should be noted that, in the present invention, fig. 3-5 do not show the whole view of the catenary system of the swing arm type contact network system for the railway vehicle test bed of the present invention, only part of the catenary is shown in fig. 3-5, but actually, a plurality of swing arm type catenary systems are connected to the same catenary cable and fixed by the movable line clip 4, and when the plurality of swing arms swing, the whole catenary is driven to move to the original position relative to the original position of the swing arm or return to the original position, therefore, flexible cables are needed for the contact net.

In some embodiments of the present invention, the swing arm type catenary system further includes a fixing block 15, and the fixing block 15 is fixed on the support column 10 and connected to an end of the transmission shaft 8 penetrating through the swing arm 9.

In this embodiment, it is necessary to fix the end of the transmission shaft for driving the swing arm 9 to rotate, so as to prevent the swing arm 9 from driving the transmission shaft 8 to generate an error in the hand condition and finally damage the differential gear of the motor in the driving box, therefore, a fixing block 15 is provided at the top of the supporting upright 10, the fixing block is in a right-angle shape, wherein the portion close to the upright extends downward and is fixed on the supporting upright 10, the top portion extends horizontally in the direction away from the supporting upright 10, therefore, the end of the transmission shaft 8 is embedded in the end of the fixing block 15 away from the supporting upright 10, and a rolling bearing is embedded at the connection portion of the fixing block 15 and the transmission shaft 8 to reduce the kinetic energy loss and the material abrasion caused by the friction between the transmission shaft 8 and the fixing block 15. And based on this, the horizontal torsion of the transmission shaft 8 brought by the swing arm 9 is stabilized. Furthermore, the fixed block 15 is designed to be open on the side facing the train, in which the swing arm 9 is oscillating back and forth.

In some embodiments of the present invention, the swing arm type catenary system further includes a distance sensor 7 fixed on the fixed block 15 for monitoring a motion track of the swing arm.

In the embodiment, the distance sensor 7 is arranged inside the opening of the fixed block 15 to monitor the swing position of the swing arm 9, and after the swing arm 9 reaches a preset swing position, the sensor sends a reverse rotation instruction to the driving motor in the driving box, so that the swing arm 9 swings in the reverse direction, and the reciprocating swing arm motion of the swing arm 9 is controlled in a circulating mode.

In some embodiments, the distance sensors 7 are symmetrically disposed in the fixing blocks 15 at both sides of the swing arm 9, and each controls the swing arm movement of the swing arm 9 to its own direction by itself. Specifically, in a competitive mode, when the swing arm on the left side detects that the swing arm 9 is closer to the swing arm, even exceeds a preset safety distance, the priority of a steering command issued to the motor in the drive box is higher than that of the opposite distance sensor 7 on the right side, so that the swing arm is prevented from swinging beyond a preset range due to the fact that a certain distance sensor fails, and safety risks are generated. That is to say the command for steering is given higher priority in the control system controlling the motor in the drive box. The rotation direction of the motor is controlled to be changed no matter which distance sensor sends a steering command. Further, when a steering command is frequently received from the distance sensor 7 for a certain time (time less than half a reciprocating swing cycle), the rotation of the motor is stopped, and an error warning is issued. Since in this case there must be a failure of one distance sensor 7 or a failure of the communication line.

In the present embodiment, a stopper is further provided outside the distance sensor 7, and the stopper is used for braking when the swing arm 9 exceeds a predetermined swing range when the swing range of the swing arm 9 controlled by the distance sensor 7 fails. In addition, the backstop adopts soft resistance to compression wear-resisting material to make towards the one side of swing arm 9, and the impact that the reducible collision brought when the 9 remaining backstops of swing arm are collided, the fixed of protection whole swing arm formula contact net.

In this embodiment, as shown in fig. 3 to 5, a limit lock 5 is further provided on the outer side of the fixed block 15, the limit lock is designed in a right-angled Z shape as shown in fig. 4, when the swing arm is in the operating state, the limit lock is in the raised state, when the swing arm type catenary is in the idle state, the swing arm type catenary is folded to be close to the fixed wall, the limit lock is put down, and the position of the swing arm type catenary is fixed by the protruding part of the right-angled Z shape, so that the space requirement of other operations is prevented from being influenced in the idle state.

According to the swing arm type contact net system provided by the invention, the active movable contact net is connected with the pantograph of the train on the rail vehicle test bed, and the connection points of the contact net and the pantograph are continuously switched in a reciprocating swing mode, so that the problem that the contact net is burnt out due to overheating generated when the contact net is connected with the fixed connection points can be prevented, meanwhile, the connection area of the pantograph can be changed in a small range while the contact net swings, and other problems caused by local overcurrent or overheating of the pantograph can also be prevented.

In the embodiment of the invention, the contact net and the pantograph move relatively in real time by driving the swing arm to swing in a reciprocating manner, so that the contact net is prevented from being burnt out due to high temperature generated by high current at the fixed connection point, and a good test environment for simulating the actual pantograph and contact net of the vehicle is achieved. Realize that the car is motionless, the contact net moves.

Claims

1. The swing arm type contact net system for the rail vehicle test bed comprises a driving box, a supporting upright post, a swing arm and a transmission shaft, wherein the driving box is fixed on the supporting upright post, one end of the transmission shaft is vertically embedded into the driving box, the other end of the transmission shaft vertically penetrates through the swing arm, the transmission shaft is driven to deflect through a motor in the driving box, and the swing arm is further driven to swing.

2. The swing arm type contact net system according to claim 1, further comprising a conductive bar, wherein both ends of the rod-shaped first member of the upper portion of the conductive bar are fixed to one side of the swing arm by means of an insulator in parallel with the swing arm.

3. The swing arm contact screen system of claim 2, wherein the conductive bar further comprises a second rod-like member perpendicular to the first member and secured below the end of the tip of the first member.

4. The swing arm contact screen system of claim 3, wherein the conductive bar further comprises a third rod-like member having one end fixed to the bottom end of the second member and the other end attached to the underside of the first member.

5. The swing arm type contact net system of claim 3, wherein a conductive belt is further connected to the lower portion of the second member of the conductive bar, and the other end of the conductive belt is connected to a contact net.

6. The swing arm contact screen system of claim 5, wherein the swing arm is a single-piece swing arm. The movable line clip is further connected to the lower end portion of the second component of the conductive bar, the movable line clip is used for fastening the contact net, and the rotating structure of the movable line clip can enable the contact net to be always parallel to the advancing direction of the train when the swing arm swings.

7. The swing arm type touch screen system of claim 1, further comprising a fixing block fixed to the support column and connected to the end of the transmission shaft passing through the swing arm.

8. The swing arm type touch screen system of claim 7, further comprising a distance sensor fixed to the fixed block for monitoring a motion trajectory of the swing arm.

9. The swing arm contactor system of claim 8, further comprising a stop secured between the distance sensor and the swing arm to prevent excessive swing of the swing arm.

10. The swing arm type contact net system of claim 7, further comprising a limit lock located on an outer sidewall of the fixed block for limiting the swing of the swing arm in an idle state.