JPH08126110A - High-speed railway rolling stock - Google Patents

Abstract

PURPOSE: To reduce aerodynamic noises of the main body of a current collector by providing mechanism to apply a specified tension on a power cable for taking out the electric power from a shoe supporting a current collecting slider, and providing a cable containing mechanism, which adjusts the length of a part of the power cable exposed to a high-speed air current. CONSTITUTION: A current collecting slider 2 for taking electricity out of a trolley wire 1 is attached to a shoe 3. The supporting of the shoe 3 and the electric insulation of a railway rolling stock are performed with a supporting insulator 5. The electric power is taken out of the shoe 3 through a power cable 6. Then, a constant tension is applied to the power cable 6, and the deformation of the shape of the cable 6 caused by the up-and-down movement of the shoe 3 is prevented. At the same time, a cable containing mechanism 8, which adjusts the length of a part of the power cable 6 exposed to a high-speed air current, is provided. Thus, the aerodynamic noises of a current-collector main body 4 can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway high-speed railway vehicle, and more particularly to a high-speed railway vehicle equipped with a current collector and a power distribution device suitable for noise reduction during high-speed traveling.

[0002]

2. Description of the Related Art As a conventional pantograph-type current collector installed in a railway vehicle, there is a pantograph equipped with a windshield on a roof of a vehicle body, as described in JP-A-64-19902. . As described in Japanese Patent Laid-Open No. 4-304101, there is a pantograph sound insulation device in which noise is reduced by providing a cover around a current collector.
In addition, as described in Nikkei Mechanical, May 4, 1992, pages 22 to 40, "The Shinkansen that speeds up," the current collector is streamlined such as a wing shape, and there is an attempt to reduce noise.

[0003]

In the current collector using the prior art disclosed in Japanese Patent Laid-Open No. Sho 64-19902, the aerodynamic force of the current collector itself which causes aerodynamic noise during traveling. There is a lot of noise. Further, the method described in JP-A-4-304101 does not reduce the aerodynamic noise of the current collector itself, but reduces the aerodynamic noise by attaching a windshield cover to reduce the speed of the flow around the current collector. The problem is that the windshield itself becomes a noise source as the vehicle speed increases. The size of the windshield is much larger than that of a current collector that originally collects electricity, and there are problems such as an increase in weight and design problems. further,
Due to the extremely large air resistance of the windshield, it is becoming difficult to meet the current needs for low noise and low air resistance.

The Nikkei Mechanicals, pages 22 to 40, issued May 4, 1992, did not consider the aerodynamic noise generated from the power supply cable.

An object of the present invention is to reduce the aerodynamic noise of the main body of the current collector and to install a high-speed railway vehicle current collector with low air resistance and aerodynamic noise without the need to attach a windproof cover around the current collector. It is to provide a vehicle.

[0006]

In order to achieve the above object, a high-speed railway vehicle of the present invention is provided with a current collecting strip contacting an overhead line, a hull supporting the current collecting strip, and a hull. Support insulator for electrically supporting the vehicle and for electrically insulating it from the railway vehicle, a power cable for extracting electric power from the hull, and for supporting the cable and electrically insulating it from the railway vehicle. In a high-speed railway vehicle equipped with a current collector having a conductive insulator, the cable is fixed to prevent the cable shape from changing due to the cable being loosened or pulled by the vertical movement of the boat. And a cable storage mechanism for adjusting the length of the portion of the cable exposed to the high-speed air flow.

[0007] Further, a current collecting strip contacting the overhead line, a boat supporting the current collecting strip, a support insulator for supporting the boat and electrically insulating the railcar from the above, A high-speed railcar equipped with a power cable for extracting power from a boat and a current collector having a conductive insulator for supporting the cable and electrically insulating the railcar from the power cable. The angle between the most tangential line exposed to the high-speed airflow and the current collector is approximately 25 degrees when the current collector is viewed from above, and the current collector is viewed from the side. And an adjusting mechanism installed so that an angle formed by a plane parallel to the line and passing through the upper end of the conductive insulator is approximately 45 degrees or less above the conductive insulator.

Further, the adjusting mechanism suppresses the power cable from sagging due to its own weight or the force of air accompanying traveling of the vehicle, so that the mounting position of the cable is associated with the conductive insulator and the hull. This is done in accordance with the change in the relative positional relationship of. Also, when connecting the power cable to the boat and the conductive insulator,
As the power cable follows the movement of the vehicle,
A retracting mechanism for retracting the power cable into the conductive insulator is provided. Further, when the power cable is connected to the hull and the conductive insulator, a guide mechanism for pulling the cable into the hull is provided so that the power cable follows the movement of the vehicle. . Further, when the cable is connected to the boat and the conductive insulator, a linear bearing is attached to a part of the power cable so that the power cable follows the movement of the vehicle and the like. It is equipped with a length changing mechanism that changes the length of the existing part. Further, in order to suppress an increase in weight of the current collector due to an increase in weight of the power cable storage mechanism, an insulator made of a polymer material is used for the conductive insulator and the support insulator. A power distribution device comprising at least two cable heads for supplying power to a high-speed railway vehicle and an extra-high cable, wherein the power distribution device is exposed to a high-speed air stream of the power cable. The angle formed by the tangent of the part and the traveling direction axis of the vehicle when the current collector is viewed from above is approximately 25 degrees, and is parallel to the track when the current collector is viewed from the side, and the conductive insulator The adjusting mechanism is installed so that the angle formed by the surface passing through the upper end is approximately 45 degrees or less above the conductive insulator. In addition, an insulator made of a polymer material is used as a material for the insulator in order to reduce the weight of the conductive insulator or the support insulator and reduce the size of the insulator as a whole.

[0009]

With the above-mentioned structure, the peak of aerodynamic noise generated from the power supply cable in the current collector having the streamlined boat and the two insulators is converted into the three-dimensional flow around the cable, and By suppressing the effective speed of the flow, it is possible to realize the current collector with low noise.

Further, it is possible to prevent aerodynamic noise generated from an extra-high-voltage cable for power distribution of a high-speed vehicle.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of a high-speed vehicle that is an embodiment of the present invention, FIG. 2 is a plan view of a current collector of the present embodiment, and FIG.
Is a side view of the current collector of the present embodiment, FIGS. 4 to 6 are side views showing a cable attached state, respectively, FIG. 7 is a schematic view showing a flow in the cable attached state, and FIGS. FIGS. 12 to 15 are diagrams showing noise measurement results obtained by the wind tunnel experiment, FIGS. 12 to 15 are diagrams showing noise measurement results obtained by the wind tunnel experiment, a plan view showing an example of a cable attachment method, and FIGS. 16 and 17 are measurement examples obtained by the wind tunnel experiment. FIG.

As shown in FIG. 1, the current collector supports a current collecting and collecting plate 2 for taking out electricity from an overhead line 1, a streamlined boat body 3 for attaching the collecting and collecting strip 2, and a boat body 3. And a support insulator 5 for electrically insulating the vehicle body 4 from the hull.
And a conductive cable 6 for extracting electric power from the hull,
It comprises a conductive insulator 7 for supporting the conductive cable 6 and a cable storage mechanism 8 for adjusting the length of the conductive cable 6.

As shown in FIGS. 2 and 3, the angle α,
β is the angle between the most tangential line of the conductive cable exposed to the air flow, the vehicle traveling direction axis when the current collector is viewed from above, and the line parallel when the current collector is viewed from the side. The angle with respect to the plane passing through the upper end of the conductive insulator is shown. This angle will be described below as a cable attachment angle.

In the example shown in FIG. 4, the slack of the conductive cable 6 is used to follow the vertical movement of the boat. The conductive cable 6 is pulled up and down while the vehicle is running because the boat 3 moves up and down in response to changes in the overhead line 1. For this reason, the conductive cable 6 is set so as to linearly connect the two points of the upper surface of the conductive insulator 7 and the lower surface of the boat 3 when the boat 3 goes up, as shown in FIG. Therefore, when the boat 3 is in the neutral position shown in FIG. 4 or in the lower position shown in FIG. 6, the conductive cable is in a slackened state downward.

In this slack state of the cable, the turbulence 9 of the air flow from the cable interferes with the cable itself and the conductive insulator as shown in FIG.

In order to show how much aerodynamic noise is generated by the conductive cable, the noise measurement results by the wind tunnel test are shown in FIGS. 8, 9, 10 and 11.

FIG. 8 shows the case where there is no conductive cable and the case where the conductive cable is slackened as shown in FIG. 4, and FIG. 9 shows the case where there is no conductive cable and the conductive cable is parallel to the flow as shown in FIG. 10 is straight, that is, when the mounting angle α is close to 0 degree, FIG. 10 shows the case where there is no conductive cable, and the case where the conductive cable is stretched straight obliquely to the flow as shown in FIG. That is, when the mounting angle α is close to 45 degrees, FIG. 11 shows the case where there is no conductive cable and when the conductive cable is stretched straight sideways to the flow as shown in FIG. 14, that is, when the mounting angle α is close to 90 degrees. The results of noise measurements are shown respectively.

A significant increase in noise is seen when the cable is slack. The peak frequency of this noise is similar to that of aerodynamic noise generated when a cylinder or the like is placed in the flow, and is a typical aerodynamic sound due to Karman vortices.

FIG. 16 shows changes in aerodynamic noise when the cable attachment angle α is changed as shown in FIG. When the mounting angle α of the conductive cable with respect to the axis parallel to the flow is 25 degrees or less, the aerodynamic noise is close to that without the conductive cable 6, and the aerodynamic noise from the conductive cable 6 is small. On the other hand, when the mounting angle α is close to 50 degrees, noise increases.

FIG. 17 shows a change in aerodynamic noise when the mounting angle β in the vertical direction shown in FIG. 2 is changed. β
If the angle exceeds 45 degrees, aerodynamic noise will increase.

Another embodiment of the present invention will be described with reference to FIGS. 18 is a side view showing the present embodiment, and FIG.
9 is a side view showing a modification of the present embodiment, and FIG. 20 is a side view showing a modification of the present embodiment.

This embodiment shows an example for reducing noise from the cable. The cable storage mechanism 8 is attached to the cable attachment portion of the conductive insulator 7 so that the attachment angles α and β of the conductive cable 6 are appropriate with respect to the vertical change of the boat during traveling, and the inside of the boat body and the storage mechanism 8 are attached. The bearings 10a and 10b provided adjust the attachment angle of the cable, and the bearing 10a and the conductive cable 6 attached to the storage mechanism 8 side move along the guide 11 to adjust the length of the conductive cable 6. Therefore, the conductive cable 6 is prevented from sagging. By setting the cable attachment angle within α (approximately 25 degrees) and β (approximately 45 degrees) previously obtained, it is possible to realize a current collector with low aerodynamic noise.

FIG. 19 shows a modification of this embodiment. The bearing 10c has a parallel movement guide 11a therein,
The conductive cable 6 is prevented from sagging by adjusting the mounting angle by the bearings 10c and 10d and moving along the parallel guide 11a as the position of the boat changes. By setting the cable attachment angle to be within α and β obtained previously, it is possible to realize a current collector with low aerodynamic noise.

FIG. 20 shows a modification of this embodiment. By supporting one end of the conductive cable 6 by the parallel movement guide 111b, the length of the portion of the conductive cable 6 exposed to the airflow can be changed. This mechanism adjusts the required length of the conductive cable according to the change in the position of the boat,
The conductive cable 6 is prevented from sagging. By setting the mounting angle of the conductive cable 6 so as to be within the previously determined α and β by the bearings 10e and 10f, it is possible to realize a current collector with low aerodynamic noise.

[0025]

According to the present invention, aerodynamic noise and aerodynamic resistance can be reduced by directly supporting a streamline boat with an insulator as a current collector for a high-speed railway vehicle.
Further, by optimizing the mounting method of the conductive cable, a drastic reduction of aerodynamic noise can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view of a high-speed vehicle that is an embodiment of the present invention.

FIG. 2 is a plan view of the current collector of this embodiment.

FIG. 3 is a side view of the current collector of the present embodiment.

FIG. 4 is a side view showing a cable attached state.

FIG. 5 is a side view showing a cable attachment state.

FIG. 6 is a side view showing a cable attached state.

FIG. 7 is a schematic diagram showing a flow in a cable attached state.

FIG. 8 is a diagram showing noise measurement results by a wind tunnel experiment.

FIG. 9 is a diagram showing noise measurement results by a wind tunnel experiment.

FIG. 10 is a diagram showing noise measurement results by a wind tunnel experiment.

FIG. 11 is a diagram showing a noise measurement result by a wind tunnel experiment.

FIG. 12 is a plan view showing an example of a cable attachment method.

FIG. 13 is a plan view showing an example of a cable attachment method.

FIG. 14 is a plan view showing an example of a cable attachment method.

FIG. 15 is a plan view showing an example of a cable attachment method.

FIG. 16 is a diagram showing a measurement example by a wind tunnel experiment.

FIG. 17 is a diagram showing a measurement example by a wind tunnel experiment.

FIG. 18 is a side view showing another embodiment of the present invention.

FIG. 19 is a side view showing a modified example of the present embodiment.

FIG. 20 is a side view showing a modified example of the present embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Overhead line, 2 ... Rail, 3 ... Boat body, 4 ... Car body, 5 ... Support insulator, 6 ... Conductive cable, 7 ... Conductor insulator, 8 ... Storage mechanism, 9 ... Disturbance of flow, 10 ... Bearing, 11 ... Translation guide.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiaki Makino 502 Jintamachi, Tsuchiura-shi, Ibaraki Prefecture Hiritsu Manufacturing Co., Ltd.Mechanical Research Laboratory (72) Inventor Kenji Kobayashi 502 Kintate-cho, Tsuchiura-shi, Ibaraki Nitate Manufacturing Co., Ltd. Inside the Mechanical Research Laboratory (72) Inventor Toyo Kake Higashi-Toyoi, Shimomatsu-shi, Yamaguchi Prefecture 794 Higashi Manufacturing Co., Ltd.

Claims (9)

[Claims] 1. A current collecting strip contacting an overhead line, a boat supporting the current collecting strip, and a support insulator for supporting the boat and electrically insulating the railway vehicle from each other. A high-speed railway vehicle equipped with a power cable for extracting electric power from a boat and a current collector having a conductive insulator for supporting the cable and electrically insulating the boat from the boat, The mechanism that applies a certain tension to the cable to prevent the cable shape from changing due to the cable being loosened or pulled as the cable moves up and down, and the portion of the cable that is exposed to high-speed airflow. A high-speed railway vehicle having a cable storage mechanism for adjusting the length. 2. A current collecting strip contacting the overhead line, a boat supporting the current collecting strip, and a support insulator for supporting the boat and electrically insulating the railcar from the boat. A high-speed railcar equipped with a power cable for extracting power from a boat and a current collector having a conductive insulator for supporting the cable and electrically insulating the railcar from the power cable. The angle between the most tangential line exposed to the high-speed airflow and the current collector is approximately 25 degrees when the current collector is viewed from above, and the current collector is viewed from the side. A high-speed railway vehicle, further comprising an adjusting mechanism installed so that an angle formed by a plane parallel to the track and passing through the upper end of the conductive insulator is approximately 45 degrees or less above the conductive insulator. 3. The conductive mechanism and the hull in which the adjusting position of the power cable is attached to the movement of the vehicle in order to prevent the electric power cable from sagging due to its own weight or the force of air accompanying the traveling of the vehicle. The high-speed railway vehicle according to claim 2, which is performed in accordance with a change in the relative positional relationship of 4. A pulling mechanism for pulling the power cable into the conductive insulator so that the power cable follows the movement of a vehicle when the power cable is connected to the boat and the conductive insulator. The high-speed railway vehicle according to claim 1. 5. A guide mechanism for pulling the power cable into the boat body so that the power cable follows the movement of the vehicle when the power cable is connected to the boat body and the conductive insulator. The high-speed railway vehicle according to claim 1. 6. A linear bearing is attached to a part of the power cable so that the power cable follows the movement of a vehicle when the cable is connected to the boat and the conductive insulator, and a linear bearing is attached to an air flow of the power cable. The high-speed railway vehicle according to claim 1, further comprising a length changing mechanism that changes the length of the exposed portion. 7. An insulator made of a polymer material is used for the conductive insulator and the support insulator in order to suppress an increase in the weight of the current collector due to an increase in the weight of the power cable storage mechanism. The high-speed railway vehicle described in any of the above. 8. A power distribution device comprising at least two cable heads for supplying power to a high-speed railway vehicle and an extra-high-voltage cable, the power distribution device being exposed to a high-speed air stream of the power cable. The angle formed by most of the tangent lines and the traveling direction axis of the vehicle when viewed from above the current collector is within approximately 25 degrees, and when the current collector is viewed from the side, it is parallel to the track and The adjusting mechanism is installed so that an angle formed by a surface passing through the upper end of the conductive insulator is approximately 45 degrees or less above the conductive insulator.
The high-speed railway vehicle according to 4, 5, or 6. 9. The high-speed railway vehicle according to claim 8, wherein an insulator made of a polymer material is used as a material for the insulator in order to reduce the weight of the conductive insulator or the support insulator and reduce the size of the entire insulator.