JPH08149604A - Pantograph support insulator and pantograph device using the insulator - Google Patents

Abstract

PURPOSE: To suppress the production of aerodynamic noise by forming a pantograph support insulator in such a way that the insulator is made longer in the longitudinal direction of a car body and has a streamlined cross section and ribs put one upon another in multiple stages in the vertical direction. CONSTITUTION: A pantograph support insulator 5 is made longer in the longitudinal direction of a car body 1 and has a streamlined cross section and ribs 31 put one upon another in multiple stages in the vertical direction so as to increase the surface insulating distance. A pair of pantograph support insulators supports a pantograph 2 and windshield cover body 7 at a required insulating distance S on the roof of the car body 1. In addition, the front and rear end sections of the insulators 5 are fixed to the roof of the car body 1 through seat bodies 3. Therefore, each insulator 5 can obtain a large contact area over the whole area of a supporting area S1 before and after the pantograph 2 and can firmly support the pantograph 2 in such a state that the insulator 5 can easily suppress the vibration of the pantograph 2. In addition, the insulator 5 can suppress the production of aerodynamic noise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support insulator for a pantograph of a railway vehicle and a pantograph device using the same.

[0002]

2. Description of the Related Art Aerodynamic noise around a pantograph has a high speed dependency, and increases with almost the sixth power law of speed. For this reason, the aerodynamic noise is high in high-speed vehicles such as the Shinkansen.
Moreover, aerodynamic noise and aerodynamic resistance are also generated from the supporting insulator itself of the pantograph. Japanese Utility Model Application Laid-Open No. 52-159507 discloses a windshield cover provided on the roof of a vehicle body so as to cover the periphery of a pantograph together with its supporting insulator. Another known windshield cover body is located on the roof of the vehicle body before and after the pantograph.

In both cases, the air flow generated along the roof when the vehicle is running is released upward, the air that hits the pantograph and its supporting insulators is eliminated as much as possible, and the air flow that hits the current collecting boat is mitigated to aerodynamic noise. Reduce.

[0004]

By the way, aerodynamic noise is also generated in the windshield cover itself, and the weight of the windshield cover itself leads to an increase in vehicle weight.

Therefore, it is desirable to reduce the aerodynamic noise according to the traveling speed of the vehicle without providing the windshield cover or by reducing the necessary range of the windshield cover. However, such a thing has not been provided yet.

An object of the present invention is to solve such a problem, and an object thereof is to provide a support insulator for a pantograph and a pantograph device using the same, which are improved so as to suppress the generation of aerodynamic noise. It is a thing.

[0007]

The support insulator for a pantograph according to the present invention is a support insulator for a pantograph, which supports the pantograph at a required insulation distance from the roof of the vehicle body in order to achieve the above-mentioned object. The main feature is that it has a streamlined cross section that is long in the front-rear direction of the vehicle body, and has vertical pleats on the outer surface to increase the surface insulation distance. Preferably done.

In order to achieve the above-mentioned object, the pantograph device of the present invention is characterized mainly in that a pair of supporting insulators having the above-mentioned constitution of the above-mentioned main features are arranged on the left and right to support the pantograph on the roof of the vehicle body. And

It is more preferable that the support insulator also supports a windshield cover body that covers the surroundings of the pantograph, leaving a sliding contact area with the catenary line, on the roof of the vehicle.

[0010]

In the above-mentioned construction of the main feature of the support insulator of the pantograph of the present invention, the support insulator is long in the front-rear direction in order to support the pantograph by the support insulator while maintaining a necessary insulation distance on the roof of the vehicle body. Therefore, one can firmly support in the necessary support area before and after the pantograph, and in a state where it is easy to suppress the vibration over the entire length of the support area to obtain a larger contact area than before, In this supporting state, even if each insulator is exposed to the opposing airflow on the roof of the vehicle body, the opposing airflow flowing along the long sides in the front-rear direction of the support insulator is in the front-rear direction formed by the multistage pleats on the both sides. The long groove guides the flow well and stabilizes the flow more, and the cross-section of the insulator has a streamlined shape, which prevents the separation of the counter airflow along it. Therefore, the ridges and troughs of the folds of the support insulator make the vortex flow generated by the separation of the opposing air flow from the support porcelain different in front, back, in and out, and cancel each other out. It is possible to reduce generation of aerodynamic resistance and aerodynamic noise due to exposure to the air flow. Therefore, depending on the traveling speed of the vehicle, the windshield cover is not necessary, and even if it is necessary, the windshield cover of the support insulator can be omitted, increasing the overall weight and halving the aerodynamic noise generated by the windshield cover itself. be able to.

In the structure in which the front and rear ends are inclined edges, even if the opposing airflow that faces the insulator and flows along the insulator causes separation at the rear edge of the insulator, this is an inclined edge. Since the vortex flow generation position due to the separation of the opposing air flow is shifted back and forth between the upper layer air flow and the lower layer air flow, it is possible to cancel each other's vortices and further reduce the aerodynamic resistance and aerodynamic noise of the insulator.

In the above-mentioned constitution which is the main feature of the pantograph device of the present invention, the pantograph is firmly supported right and left by simply disposing a pair of the above-mentioned support insulators on the roof of the vehicle body on the left and right sides, and the aerodynamic sound is generated. Can be reduced.

In a structure in which the support insulator also supports the windshield cover body covering the surroundings of the pantograph, leaving a sliding contact area with the overhead wire of the pantograph, at the same time, the support insulator supports the windshield cover body supported by the support insulator. , The windshield cover that is flattened to the minimum necessary size to generate aerodynamic noise from the pantograph itself while exhibiting the above-mentioned characteristics between the roof of the vehicle body supporting this and the need for the windshield cover. Reduced by the body,
The weight increase of the vehicle body and the generation of aerodynamic noise due to the windshield cover can be halved. In addition, the flat windshield cover raises the air flow toward the current collecting boat and rectifies it in a small, low-speed state, reducing aerodynamic resistance and aerodynamic noise at the current collecting boat. It is possible to reduce the disconnection of the collector boat from the overhead line.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle pantograph apparatus using a pantograph support insulator as a first embodiment of the present invention shown in FIGS. 1 to 5 will be described below.

This embodiment shows a case where it is applied to a pantograph 2 provided on a high-speed vehicle body 1 such as a bullet train as shown in FIG.

As shown in FIGS. 1 and 2, a windshield cover body 7 for covering the pantograph 2 and a sliding contact area 10 between the pantograph 2 and the overhead wire 6 is seated on a roof 21 of a vehicle body 1 as shown in FIGS.
Is supported by a support insulator 5 fixed through the roof 2
A predetermined insulation distance X is provided between the two. As a result, even if the pantograph 2 and the windshield cover body 7 are charged when current is collected from the overhead wire 6 by the current collector boat 8, electrical safety on the vehicle body 1 side is ensured. Therefore, the windshield cover 7 may be made of various materials as long as it has antistatic property, and there is no other special limitation.

In particular, the support insulator 5 is long in the front-rear direction of the vehicle body 1 as shown in FIGS. 1 and 2 and has a streamlined cross section as shown in FIG. It has a multi-stage fold 31 on the outer surface in the vertical direction of
The pantograph 2 and the windshield cover body 7 are supported on the roof of the vehicle body 1, and the front and rear end portions of each support insulator 5 are seat bodies 3 respectively.
It is fixed on the roof of the vehicle body 1 via.

As described above, the support insulator 5 for supporting the pantograph 2 and the windshield cover body 7 while maintaining the required insulation distance X on the roof of the vehicle body 1 is long in the front-rear direction, and is required before and after the pantograph 2. It is possible to obtain a large contact area in the support area S1 and over the entire area of the support area S1 as compared with the conventional one, so that it is possible to firmly support the vibration of the contact area S1. In this support state, the support insulator 5 is the airflow A of the countercurrent airflow A that is directed under the windshield cover body 7, that is, between the windshield cover body 7 and the roof of the vehicle body 1.
Exposed to 2. However, since the support insulator 5 supports the pantograph 2 and the windshield cover body 7 in a pair that is long in the front-rear direction of the vehicle body 1, these are provided in the required support area S1 and more than in the conventional case over the entire support area S1. Therefore, it is possible to obtain a large contact range and firmly support such vibration in a state where it is easy to suppress them. In addition, each support insulator 5 has an air flow A.
Even when exposed to 2, the airflow A3 shown in FIGS. 5A to 5D flowing along the long sides in the front-rear direction of the vehicle body 1 of the support insulator 5 has a multi-stage pleated front-rear direction on the both sides. By the long groove 31a, as shown in FIGS. 5 (b) to 5 (d), the flow is further stabilized by well rectifying the flow, and the cross section of the supporting insulator 5 has a streamlined shape. Since it is difficult for the opposing airflow A2 flowing along this to separate,
The ridges 31b and the valleys 31c of the folds 31 of the support insulator 5 are
As shown by A4 and A5 in FIGS. 5 (b) and 5 (c), the generation position of the vortex flow generated by the separation of the opposing air flow A2 with respect to this is also combined with the conventional function of canceling each other by making them different in the front and back, inside and outside It is possible to reduce the generation of aerodynamic resistance and aerodynamic noise due to the support insulator 5 being exposed to the opposing airflow A2.

Further, as shown in FIG. 2, the supporting insulators 5 are arranged in a pair on the roof of the vehicle body 1 so that the pantograph 2 can be firmly supported on the left and right sides, and the aerodynamic noise can be reduced. Can be planned.

On the other hand, the windshield cover 7 provided around the pantograph 2 omits the portion of the conventional windshield cover that covers the support insulator 5 of the pantograph, but the action of the support insulator 5 causes the pantograph to function. The aerodynamic sound generated by the device can be sufficiently suppressed, and the pantograph 2 is flattened to the minimum necessary size as the windshield regardless of the decrease in the height of the roof 21 of the vehicle body 1 due to the speeding up of the vehicle.
A pseudo airfoil can be formed as shown in this embodiment.

Due to the flattening and pseudo-wing shape, the windshield cover body 7 can be uniformly reduced in weight, which can contribute to weight reduction of the vehicle, and the center of gravity of the vehicle rises, which causes swaying during traveling. It is also possible to improve driving stability and riding comfort by suppressing this. Further, the windshield cover body 7 can be formed into a streamlined shape as shown in a low-volume view so as to have a good appearance without impairing the streamlined image of the high-speed vehicle.

Further, the generation of aerodynamic resistance and aerodynamic noise due to the windshield cover body 7 itself can be greatly reduced by the flattened and pseudo-wing-shaped streamline shape.
Is particularly advantageous for this reduction since the structure of the pantograph 2 covers the four perimeters of the complicated base. Therefore, it is possible to guarantee stable running with less aerodynamic noise even if the vehicle body 1 speeds up.

Further, the flattened and pseudo-wing type streamlined windshield cover body 7 shows, as shown in FIG. 1, the airflow A1 directed to the current collecting boat 8 of the pantograph 2 in the opposed airflow A shown in FIG. Since the supporting height of the supporting insulator 5 is smaller than the supporting height H1, a small rising height H2 is obtained, which is rectified at a low speed.
The generation of aerodynamic resistance and aerodynamic noise in the current collecting boat 8 is reduced, and the occurrence of a heading angle is also small.
Since the contact loss ratio with respect to is reduced, the number of occurrences of spark noise is significantly reduced.

As shown in FIG. 1, the windshield cover 7 has a streamlined vertical cross section in the front-rear direction of the vehicle body 1. As a result, the separation of the countercurrent airflows A1 and A2 flowing along the windshield cover body 7 from the windshield cover body 7 is also reduced, and the aerodynamic resistance and the aerodynamic noise due to the separation of the countercurrent airflow caused by the windshield cover body 7 are reduced. It is also possible to reduce the occurrence of.

The windshield cover body 7 of this embodiment includes a fixed base portion 7a supported by the support insulator 5 and a movable upper portion 7b supported by a link mechanism 32 so as to be vertically movable with respect to the fixed base portion 7a. The upper portion 7b is provided separately by the action of an actuator 33 such as an air cylinder connected to the link mechanism 32, so that the fixed base portion 7 shown in FIGS.
1 and FIG. 2 of the pantograph 2 are designed so as to be moved up and down between a use position continuing in a smooth shape on a and a storage position stored in the fixed base portion 7a shown in FIGS. 3 and 4. Two
By operating the use position and the storage position shown in FIGS. 3 and 4 in accordance with the use position shown in FIG. 3 and the storage position shown in FIGS. Then, it is possible to minimize the protrusion of the vehicle body 1 from the roof together with the pantograph 2. The operation between the use position and the storage position of the pantograph 2 may be performed in a conventional manner by an actuator (not shown) which is operated by using the support base 34 shown in FIGS. 2 and 4 of the pantograph 2. 33 can also be shared. When shared, there is no need to add an actuator, which is advantageous.

Further, in this embodiment, a rounded rising portion 7c as shown in FIG.
Since the flat windshield cover body 7 does not sufficiently start up the opposing airflow A1 due to the formation of the above, it is possible to avoid such an inconvenience that it extends to the current collecting boat 8 of the pantograph 2.

The second embodiment of the present invention shown in FIGS. 6 to 10 is that the front and rear ends of the support insulator 5 form inclined edges 5a.
And this inclined edge 5a has a streamlined vertical cross section in the front-rear direction of the vehicle body 1 as in the first embodiment.
Overall shape that smoothly follows the inclined surface before and after,
It differs from the first embodiment in that it has a size, that is, a length.

In the present embodiment, the windshield cover body 7 is an integrally fixed one piece, and one support insulator 5 is provided.
A protective grounding switch 41 is built in the center portion of the inside by utilizing an inwardly bulging portion 5b of the supporting insulator 5 as shown in FIGS. The protective grounding switch 41 has a structure in which the actuator 41a of the protective grounding switch 41 stands upright as shown by the solid line in FIG.
As shown in FIG. 6, it is moved to the grounded position where it comes into contact with the contact terminal 44 on the side of the windshield cover 7 and the laid down non-grounded position shown by the phantom line in FIG. 6 to switch between the used state and the unused state. This switching state is the inspection window 4 provided on the outer side surface of the windshield cover body 7.
It is possible to confirm it from the outside through 3.

In the present embodiment, even if the opposing air flow A2 which faces the supporting insulator 5 and flows along the supporting insulator 5 causes separation at the rear end edge of the supporting insulator 5, the opposing air flow A2 forms the inclined edge 5a, so The vortex generation position due to the separation of the air flow A2 is
As shown in FIGS. 6 and 10, the upper layer airflow A6 and the lower layer airflow A7
Since they are displaced back and forth between and, it is possible to cancel each other's vortices and further reduce the aerodynamic resistance and aerodynamic noise of the support insulator 5.

For this purpose, the inclination direction of the inclined edge 5a of the support insulator 5 is the same even if it is opposite to that of this embodiment. In this embodiment, each supporting insulator 5 is provided with a size and shape such that the inclined edges 5a are continuous with the front and rear inclined surfaces of the windshield cover body 7 with the same inclination, and faces the inclined edge 5a which is the front end. Since the ascending airflow of the opposing airflow A2 that cannot be fully rotated on both sides of the support insulator 5 is guided along the inclined surface of the windshield cover body 7 smoothly as shown in A8 in FIG. It is more advantageous to reduce the aerodynamic resistance and the aerodynamic noise generated by the support insulator 5.

[0031]

According to the main feature of the support insulator of the pantograph of the present invention, the support insulator is long in the front-rear direction for supporting the pantograph by the support insulator while maintaining a necessary insulation distance on the roof of the vehicle body. Therefore, one can firmly support in the necessary support area before and after the pantograph, and in a state where it is easy to suppress the vibration that obtains a large contact area over the entire length of this support area. Even if each insulator is exposed to the oncoming airflow on the roof of the vehicle body, the oncoming airflow that flows along the long sides in the front-rear direction of the support insulator is generated by the long grooves in the front-rear direction formed by the multistage pleats on the both sides. It is guided and well rectified, the flow is more stable, and the cross-section of the insulator has a streamlined shape, so that the separation of the opposing air flow along it is less likely to occur, so it is supported. The ridges and troughs of the child folds the eddy currents generated by the separation of the opposing airflow from the supporting insulator, and the eddy currents are offset in the front and back and in the outside to cancel each other out. It is possible to reduce the generation of aerodynamic resistance and aerodynamic noise due to the noise.
Therefore, depending on the traveling speed of the vehicle, the windshield cover is not necessary, and even if it is necessary, the windshield cover of the support insulator can be omitted, increasing the overall weight and halving the aerodynamic noise generated by the windshield cover itself. be able to.

According to the supporting insulator having the inclined edges at the front and rear ends, even if the counter air current that flows toward and faces the insulator causes separation at the rear edge of the insulator, this becomes an inclined edge. Since the vortex generation position due to the separation of the opposing airflow is shifted back and forth between the upper airflow and the lower airflow, the mutual vortices cancel each other out, further reducing the aerodynamic resistance and aerodynamic noise of the insulator. can do.

According to the main feature of the pantograph device of the present invention, the pantograph is firmly supported on the left and right by simply disposing the supporting insulators in a pair on the roof of the vehicle body, and the aerodynamic noise is reduced. Can be achieved.

According to the pantograph device in which the support insulator also supports the windshield cover body that covers the surroundings of the pantograph leaving the sliding contact area with the overhead wire of the pantograph at the same time, the support insulator supports the support insulator. Between the windshield cover body and the roof of the vehicle body that supports it, the above features are exerted to eliminate the need for a windshield cover, while minimizing the generation of aerodynamic noise from the pantograph itself. The flattened windshield cover body reduces the weight of the vehicle body and the generation of aerodynamic noise due to the windshield cover. In addition, the flat windshield cover raises the air flow toward the current collecting boat and rectifies it in a small, low-speed state, reducing aerodynamic resistance and aerodynamic noise at the current collecting boat. It is possible to reduce the disconnection of the collector boat from the overhead line.

[Brief description of drawings]

FIG. 1 is a side view showing a usage state of a pantograph device for a railway vehicle as a first embodiment to which the present invention is applied.

FIG. 2 is a front view showing a usage state of the pantograph device in FIG.

3 is a side view showing a non-use state of the pantograph device of FIG. 1. FIG.

FIG. 4 is a front view showing a non-use state of the pantograph device of FIG.

5A and 5B are explanatory views showing various relationships with the counter airflow of the pantograph device of FIG.

FIG. 6 is a side view showing a usage state of a pantograph device for a railway vehicle as a second embodiment to which the present invention is applied.

FIG. 7 is a plan view showing a usage state of the pantograph device of FIG.

8 is a side view showing a usage state of the pantograph device of FIG. 5. FIG.

9 is a cross-sectional view of a portion with a built-in protective grounding switch of the insulator of the pantograph device of FIG.

FIG. 10 is an explanatory diagram showing a relationship with the counter airflow of the pantograph device of FIG.

[Explanation of symbols]

 1 Car Body 2 Pantograph 5 Support Insulator 5a Inclined Edge 7 Windshield Cover 31 Fold X Required Insulation Distance

Claims (4)

[Claims] 1. A support insulator for a pantograph, which supports a pantograph at a required insulation distance from a roof of a vehicle body, wherein the vehicle body is long in the front-rear direction and has a streamlined cross-section, and upper and lower parts for increasing the surface insulation distance. A support insulator for a pantograph characterized in that it has a multi-folded fold in the outer direction. 2. The support insulator for a pantograph according to claim 1, wherein the front and rear ends are inclined edges. 3. A pantograph device, comprising a pair of left and right support insulators according to claim 1 for supporting a pantograph on a roof of a vehicle body. 4. The pantograph apparatus according to claim 3, wherein the support insulator also supports a windshield cover body that covers the periphery of the pantograph, leaving a sliding contact area with the overhead wire of the pantograph, simultaneously on the roof of the vehicle.