阅读说明：本技术 一种轨道车辆试验台接触网模拟装置 (Rail vehicle test bench contact net analogue means ) 是由 王大鹏 李忞 张文春 倪忠强 王铁钧 孙珂 张文亨 于 2021-08-02 设计创作，主要内容包括：一种轨道车辆试验台接触网模拟装置,包括：支架、驱动箱、转动装置,其中所述驱动箱安装在支架的端部,所述转动装置通过传动轴与所述驱动箱相连。通过本发明所提出的一种轨道车辆试验台用接触网模拟装置,通过以对称的直径渐变的圆形转盘的转动模拟轨道列车在真实环境中受电弓与接触网的相对运动,通过半径渐变的设计在受电弓保持静止的情况下使得转动装置边缘的接触网在受电弓静止时,在受电弓滑板上往复滑动,进一步解决因电流大小受列车功率影响而无法限制且接触点长时间不变化导致的局部发热及局部升温太高对受电弓及接触网的带来的安全隐患。(The utility model provides a rail vehicle test bench contact net analogue means, includes: the device comprises a support, a driving box and a rotating device, wherein the driving box is installed at the end part of the support, and the rotating device is connected with the driving box through a transmission shaft. According to the contact net simulation device for the rail vehicle test bed, the relative motion of a pantograph and a contact net of a rail train in a real environment is simulated through the rotation of the symmetrical circular rotating disc with the gradually-changed diameter, and the contact net at the edge of the rotating device slides on the pantograph slide plate in a reciprocating manner under the condition that the pantograph is kept static through the design of the gradually-changed radius, so that the potential safety hazard caused by local heating and high local temperature rise due to the fact that the current is not limited by the influence of train power and the contact point is not changed for a long time is further solved.)

1. The utility model provides a rail vehicle test bench contact net analogue means which characterized in that includes: the device comprises a support, a driving box and a rotating device, wherein the driving box is installed at the end part of the support, and the rotating device is connected with the driving box through a transmission shaft.

2. The device of claim 1, wherein the edge of the rotating device is further provided with an electrically conductive strip, and the electrically conductive strip is connected with the edge of the rotating device through an insulating member.

3. The apparatus of claim 2, wherein the rotating means comprises a center of rotation connected to the drive shaft, and the distance of the conductive strip from the center of the rotating means in a polar coordinate system obeys the following distance equation:

R＝kθ+C(0≤θ≤π，rad)

R＝-kθ+C(-π＜θ＜0，rad)

wherein R represents a horizontal distance from the conductive bar to the rotation center;

k is a pull-out value coefficient, and when k is a contact net pull-out value (when radian is 0 or pi rad) which is 2/pi times, the contact net deviates from the center of the pantograph slide plate to reach the maximum distance, unit: millimeter;

c is a constant, in units: millimeter, which represents the minimum distance from the conductive strip to the center of rotation;

θ represents the radians in a polar coordinate system.

4. The apparatus of claim 3, wherein k is 500/π mm.

5. The apparatus of claim 3, wherein the rotating means further comprises an annular rim and support bars, the annular rim being connected to the center of rotation by evenly distributed support bars.

6. The device of claim 5, further comprising a first conductive bar, wherein the first conductive bar is of an annular structure with the rotation center as a center and is fixed on the supporting bar through an insulating fixing structure.

7. The apparatus of claim 6, further comprising a second conductive bar secured to the rack and drive box by an insulator and electrically connected to the first conductive bar.

8. The apparatus of claim 7, further comprising a conductive brush positioned above and connected to the first conductive row and connected at another end to the second conductive row.

9. The apparatus of claim 6, further comprising a third conductive bar located above the support bars and connected to the first conductive bar at one end and to the conductive bar at the edge of the rotating means at the opposite end.

10. The device of claim 1, wherein the drive shaft is a drive shaft made of an insulating material.

Technical Field

The invention belongs to the field of rail vehicle tests and tests, and particularly relates to a rail vehicle test bed contact net simulation device.

Background

In railway line contact net construction, the straightway contact net usually has a pull-out value (the distance between the contact net fixed point and the line center longitudinal plane) of 200-300 mm at the fixed point, so that the contact net becomes 'Z' -shaped, thereby ensuring the periodic transverse change of the contact point energy of the pantograph when the rail vehicle is in operation, and being beneficial to heat dissipation and prolonging the service life of the pantograph slide plate. The principle is shown in fig. 1.

However, during the rail vehicle rack test, the pantograph of the entire vehicle and the roof is almost static relative to the ground, and in order to avoid the contact position between the pantograph nets being too fixed, the contact point of the pantograph slide plate needs to be moved transversely relative to the vehicle body within a certain range while the contact point position of the catenary is changed, so that the pantograph is simulated to slide on the Z-shaped contact net.

In the prior art, the motion of the movable platform is realized through the actuating cylinder, so that the system is complex, the reliability is low, and the maintenance cost and the manufacturing cost are high.

Disclosure of Invention

In order to solve the problems, the invention provides a contact net simulation device of a rail vehicle test bed, which comprises: the device comprises a support, a driving box and a rotating device, wherein the driving box is installed at the end part of the support, and the rotating device is connected with the driving box through a transmission shaft.

In some embodiments of the invention, the edge of the rotating device is further provided with a conductive strip, and the conductive strip is connected with the edge of the rotating device through an insulating member.

In some embodiments of the invention, the rotating device comprises a center of rotation connected to the transmission shaft, and the distance from the conductive strip to the center of rotation obeys the following distance formula in a polar coordinate system:

R＝kθ+C(0≤θ≤π，rad)

R＝-kθ+C(-π＜θ＜0，rad)

wherein R represents the horizontal distance from the conductive strip to the center of the rotating device; k is a pull-out value coefficient, and when k is a contact net pull-out value (when radian is 0 or pi rad) which is 2/pi times, the contact net deviates from the center of the pantograph slide plate to reach the maximum distance, unit: millimeter; c is a constant, in units: millimeter, which represents the minimum distance from the conductive strip to the center of rotation; θ represents the radians in a polar coordinate system.

In some embodiments of the invention, k is 500/π millimeters.

In some embodiments of the invention, the rotating means further comprise an annular rim and support bars, the annular rim being connected to the centre of rotation by evenly distributed support bars.

In some embodiments of the present invention, the support bar further includes a first conductive bar, and the first conductive bar is an annular structure with the rotation center as a center and is fixed on the support bar through an insulating fixing structure.

In some embodiments of the present invention, the apparatus further comprises a second conductive bar, wherein the second conductive bar is fixed on the bracket and the driving box through an insulator, and is electrically connected to the first conductive bar.

In some embodiments of the invention, the device further comprises a conductive brush, the conductive brush is located above the first conductive row and connected with the first conductive row, and the other end of the conductive brush is connected with the second conductive row.

In some embodiments of the present invention, the device further includes a third conductive bar, where the third conductive bar is located above the supporting bars, and one end of the third conductive bar is connected to the first conductive bar, and the other opposite end of the third conductive bar is connected to the conductive bar located at the edge of the rotating device.

In some embodiments of the invention, the drive shaft is a drive shaft made of an insulating material.

According to the contact net simulation device for the rail vehicle test bed, the relative motion of the pantograph and the contact net of a rail train in a real environment is simulated through the rotation of the symmetrical circular rotating disc with the gradually-changed diameter, and the contact net at the edge of the rotating device swings on the pantograph sliding plate in a reciprocating mode under the condition that the pantograph is kept static through the design of the gradually-changed diameter, so that the contact net is prevented from being in single-point long-time contact with the pantograph, and the potential safety hazards of the pantograph and the contact net caused by super-strong current and heating are further solved.

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 operation effect of the catenary simulation device of the invention;

fig. 3 is a structural diagram of a catenary simulation apparatus according to an embodiment of the present invention;

fig. 4 is a theoretical diagram of the shape design of the rotating device of the catenary simulation device according to the embodiment of the invention;

fig. 5 is a top view of a structure diagram of the catenary simulation apparatus 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.

As shown in fig. 2, in a real train operation environment, the wiring manner of the overhead line system in the traveling direction of the train is designed in a zigzag manner or a zigzag manner, so that when the pantograph at the top of the train contacts the overhead line system in the running process of the train, the pantograph and the overhead line system can avoid the contact at a fixed place on the pantograph by means of the zigzag wiring of the overhead line system, and further avoid the heat generated by current from accumulating at the same contact point to burn the pantograph under the conditions of friction loss of the pantograph and long-time contact. In the test stage, the test platform is generally installed indoors or outdoors, and the train is relatively fixed in position with respect to the test platform during the test, so that the effect of the actual contact-type connection method is lost, and the operation mode of the contact system of the test platform is generally changed to avoid the potential safety hazard caused by the long-time contact between the contact system and the pantograph at the same contact point. As shown in fig. 1, in a schematic diagram of a catenary of the prior art, in fig. 1, actuating cylinders in multiple directions are arranged at the lower part of the catenary, and the center of a circle (a rotation center) of a catenary rotating disc is displaced by the extension and contraction of the actuating cylinders in multiple directions, so that the edge part of the rotating disc is also translated along with the center of the circle, and the effect of similarly displacing on a pantograph is achieved. However, this is more costly to implement, and is expensive to maintain and manufacture due to the complexity of the system, the energy consumption and reliability of the cylinders being affected by the quality of the components.

As shown in fig. 3, the invention provides a contact net simulation device for a rail vehicle test bed, which comprises: the device comprises a support 1, a driving box 2 and a rotating device 3, wherein the driving box 2 is installed at the end part of the support 1, and the rotating device is connected with the driving box 2 through a transmission shaft 5.

In this embodiment, the catenary simulation device mainly includes three parts, namely, the support 1, the drive box 2 and the rotating device 3, wherein the support 1 is a supporting component for fixing the whole catenary simulation device, one section of the support is fixed on the test bed, and the other end of the support fixes the drive box 2 through a fastener. The rotating device 3 simulates a contact net to be connected with a pantograph at the top of the train. In this embodiment, a through hole is left in the center of the rotating device 3, one end of the transmission shaft 5 can be inserted into the through hole, and the driving shaft 5 is fastened in the through hole by a fastener, so that the driving shaft 5 and the rotating device 3 do not rotate relatively, the other end of the transmission shaft is connected with the driving box 2, the driving box comprises a driving motor, a differential gear set and a fastening device, the fastener in the driving box at the other end of the transmission shaft 5 is fixed in the driving box and coupled with a differential gear, and under the driving of the driving motor, the transmission shaft 5 rotates at a constant speed and drives the rotating device 3 to rotate, so that the rotating device 3 and a slide plate of a pantograph on a train generate relative displacement.

In some embodiments of the present invention, the edge of the rotating device 3 is further provided with a conductive strip 6, and the conductive strip 6 is connected with the edge of the rotating device 3 through an insulating member.

In this embodiment, a conductive bar 6 is further disposed at the edge of the rotating device 3, and the conductive bar 6 is used as a conductive device directly contacting with a pantograph of a train, and has good conductive performance. And is fixed on the rotating device 3 through an insulated connection mode with the rotating device 3.

In some embodiments of the invention, the rotating means 3 comprise a rotation center connected to said transmission shaft 5, the distance of said conductive strips from said rotation center obeying the following distance formula in a polar coordinate system:

R＝kθ+C(0≤θ≤π，rad)

R＝-kθ+C(-π＜θ＜0，rad)

wherein R represents the horizontal distance of the conductive strip 6 to the center of rotation; k is a pull-out value coefficient, and when k is a contact net pull-out value (when radian is 0 or pi rad) which is 2/pi times, the contact net deviates from the center of the pantograph slide plate to reach the maximum distance, unit: millimeter; c is a constant, in units: mm, which represents the minimum distance of the conductive strip 6 from the center of rotation; θ represents the radians in a polar coordinate system.

In the present embodiment, as shown in fig. 3-4, the conductive strip shown in fig. 3 is almost at the same position in the horizontal direction as the edge of the rotating device 3, and in practice, the conductive strip is in contact with the pantograph, but the displacement distance determining the pull-out value of the conductive strip from the pantograph is the distance from the edge of the rotating device 2 to the center of rotation, so the distance variation rule of the conductive strip with respect to the center of rotation is described below with the edge of the rotating device. The shape of the rotating means 3 is calculated in a polar coordinate system by the above formula. As can be seen from the formula, k is a coefficient relating an angle to a lateral offset (a distance of the catenary from the center of the pantograph pan), the offset increases or decreases by a certain value when the catenary rotates by one angle, the minimum radius of the rotating device 3 is determined by C, in a polar coordinate system, when the angle is 0, the distance from the edge to the center of the rotating device 3 is the minimum, in this example, C is selected to be 1000 mm. When the rotating device 3 is in contact with the pantograph, reference is made to the schematic diagram of the catenary and the pantograph shown in fig. 2. Depending on the length of the support 1, if the support 1 is a minimum distance support, in which case the edge of the minimum radius of the turning device 3 is in contact with the end of the pantograph closest to the pantograph slide of the catenary support 1, the radius R gradually increases during the turning of the turning device 3 and is further away from the center of the turning device 3, going right from one end to the other end on the pantograph slide. Therefore, k θ in the formula is equal to the maximum displacement, i.e. the pull-out value, of the pantograph slide plate and the overhead contact system under the condition that C is unchanged. Since it is theoretically provided that the center of the pantograph pan is connected to the catenary during actual train operation, the length of half the pantograph pan is called the pull-out value, and k θ/2 at 0 ° or 180 ° is equal to the pull-out value in normal use.

In some embodiments of the invention, k is 500/π millimeters.

In this embodiment, the contact length of a standard pantograph with a catenary is typically 50 cm. Therefore, in the case of the shortest support 1 (cost saving), the minimum radius of the rotating device 3 is in contact with the proximal end of the pantograph pan and is further away from the distal end of the pantograph pan by 50cm, so that k is 500/pi, which just ensures that the maximum radius of the rotating device 3 is connected with the distal end of the pantograph pan 3. The value of k cannot exceed the ratio of the length of the pantograph to pi, and if the value of k exceeds the ratio, the pantograph slide plate and the overhead line system frequently lose connection under certain conditions. And when the length of the bracket 1 is limited, and the minimum radius R is just connected with one end of the pantograph slide plate, which is closest to the overhead line system, the value of k cannot be lower than the ratio of the length of the pantograph to pi.

In some embodiments of the invention, the rotating means 3 further comprise an annular rim and support strips 4, said annular rim being connected to said centre of rotation by evenly distributed support strips 4.

In the present embodiment, the rotating means 3 is of a nearly circular design in the top view, and in order to reduce the weight of the rotating means 3, the edge of the rotating means 3 is of a circular design, and the edge of the rotating means 3 is fixed to the center by the uniformly designed support strips 4, while reducing the weight of the rotating means 3. The number of the supporting strips 4 can be increased or decreased according to the needs.

In some embodiments of the invention, each support strip 4 has a length and a thickness that are different, but the weight of the support strip is symmetrical with respect to the center of gravity, for example, in a polar coordinate system as shown in fig. 4, the length of the support strip at the 0 ° position is different from the length of the support strip 4 at the 180 ° position, and the thickness is different, but in order to ensure that the center of gravity of the rotating means 3 is centered, the support strip with the shorter radius has a thicker thickness, and the support strip with the longer radius has a thinner thickness. Specifically, the gravity center position (in this embodiment, the center position on the length of the support bar 4) is calculated for the homogeneous object, the distance from the gravity center of the support bar to the center of the rotating device is calculated, the distance from the gravity center of the support bar 4 at the symmetrical position to the center of the rotating device 3 is calculated, the proper weight of a plurality of groups of two support bars symmetrically arranged is determined according to the weight 1, the center distance 1 and the weight 2, and the thickness of the corresponding support bar 4 is determined according to the weight.

In some embodiments of the present invention, the device further includes a first conductive bar 11, where the first conductive bar 11 is an annular structure with the rotation center as a center, and is fixed on the supporting bar 4 through an insulating fixing structure.

In this embodiment, as shown in fig. 3 and 5, an annular first conductive bar 11 is fixed on the supporting bar 4 by an insulating fixing structure, and as shown in fig. 3, the cross-sectional view of the annular first conductive bar 11 is a T-shaped structure, and is better contacted with the conductive brush.

In some embodiments of the present invention, the apparatus further comprises a second conductive bar 7, wherein the second conductive bar 7 is fixed on the bracket 1 and the driving box 2 through an insulator 8, and is electrically connected with the first conductive bar.

In the present embodiment, as shown in fig. 3, a second conductor bar 7 fixed by a plurality of insulators 8 is further provided on the top of the support 1 and outside the contour of the driving box 2, and one end of the second conductor bar 7 is used as a power supply interface of the catenary simulator for supplying power to the train.

In some embodiments of the present invention, the conductive brush 9 is further included, the conductive brush 9 is located above the first conductive row 11 and connected to the first conductive row 11, and the other end of the conductive brush is connected to the second conductive row 2, as shown in fig. 3, the cross-sectional view of the annular first conductive row 11 is a T-shaped structure, and the conductive brush is better contacted with the upper contact platform.

In this embodiment, as shown in fig. 3, in order to supply power to the annular first conductive bar 11, a conductive brush 9 is disposed above the first conductive bar, and the conductive brush 9 is connected to the second conductive bar 7 and fixed to the second conductive bar 7. When the rotating device 3 rotates, power can be supplied to the annular first conductor bar 11 via the conductor brushes 9.

In some embodiments of the present invention, a third conductive bar 10 is further included, and the third conductive bar 10 is located above the support bars 4, and has one end connected to the first conductive bar 11 and the other opposite end connected to the conductive bar 6 located at the edge of the rotating device.

In this embodiment, the supporting bars 4 and the first conductive bar 11 and the contact network 6 at the edge of the rotating device 3 are all insulated, in order to meet the power supply requirement for the conductive bar 6, the third conductive bar 10 is suspended above the supporting bars 4, one end of the third conductive bar 10 is connected with the first conductive bar 11 and fastened at the middle lower part of the first conductive bar (to avoid the influence on the power supply of the conductive brush 9 and the first conductive bar 11), and the other end is fixed on the conductive bar 6 to supply power for the conductive bar 6.

In some embodiments of the present invention, the drive shaft 5 is a drive shaft made of an insulating material.

In this embodiment, the support strip 4 in the rotating device 3 and other conductive strips and conductive strips 6 on the rotating device 3 are all subjected to insulation treatment, but because the rotating device 3 is in a rotating state for a long time in the operation process, the conductive strips or conductive discharge generated by the failure of some unexpected insulation connection structures brought by the rotation of the rotating device 3 are thrown off onto the support strip 4, and then the current is brought to the drive box along the transmission shaft 5 to burn out the motor in the drive box or continue to burn out the testing personnel to the testing platform along the drive box 5 to the support 1. Therefore, a further safety is applied at the drive shaft 5, the drive shaft 5 being selected as an insulated drive shaft. Or the two driving shafts are spliced into one by an insulated fixing structure.

According to the contact net simulation device for the rail vehicle test bed, the relative motion of the pantograph and the contact net of a rail train in a real environment is simulated through the rotation of the symmetrical circular rotating disc with the gradually-changed diameter, and the contact net at the edge of the rotating device swings on the pantograph sliding plate in a reciprocating mode under the condition that the pantograph is kept static through the design of the gradually-changed diameter, so that the contact net is prevented from being in single-point long-time contact with the pantograph, and the potential safety hazards of the pantograph and the contact net caused by super-strong current and heating are further solved.