JPH03235601A - Trains and train contact current collectors - Google Patents

Abstract

PURPOSE:To prevent current collecting performance from deteriorating even during stoppage or low speed running by providing a contact type current collector with means for lowering relative speed with respect to feeder line. CONSTITUTION:A collector rail 4 sweeps tightly on the surface of a rotary drum 5. The force of an air spring 7 for retaining the rotary drum 5 is set at such level as the allowance of the installation height of the rail does not cause floating of the drum from the rail. Consequently, the rotary drum 5 rolls on the rail with no slip thus collecting current with no slip. When the ratio between the rotary drum 5 and the effective diameter of the collector shoe 11 is set in the range of 1/5 to 1/10, relative sliding speed of the collector brush 12 is 50 - 100km/h for the rated speed of 500km/h of train and which is within a sufficiently current collectable range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a current collector for supplying on-board power to a train system running at high speed.

[Conventional technology]

Onboard electric power for high-speed trains, such as magnetic levitation trains, is required for refrigerators, passenger lighting, control, etc. - 60 kW per train, which is a fraction of the electric power required for conventional lines. However, it still requires a considerable amount of current. This current is collected when the traveling speed of the magnetic levitation train is 500 km /
In order to reach h, pantograph current collection like conventional lines,
It is believed that pantograph wear due to arcing is seriously impossible. Therefore, two methods are currently being devised: one is to connect a power supply vehicle loaded with an internal heat engine, and the other is to install coils on the vehicle and on the ground side to collect electricity without contact using electromagnetic induction.

[Problem to be solved by the invention]

However, in the former power supply vehicle system, it becomes necessary to reduce the passenger capacity by that amount, which lowers profitability.

In the latter non-contact current collection method, the power that can be collected is proportional to the driving speed, so current cannot be collected when the vehicle is running at low speed or when the vehicle is stopped, which makes it necessary to have a backup storage battery. In particular, when an emergency stop occurs outside of a station due to an accident, it becomes impossible to collect current for a long period of time, which poses a problem with the reliability of the entire system.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a train having a current collector that does not reduce the collected power even when the train is stopped or running at low speed. Another object of the present invention is to provide a train having a current collector that does not reduce the passenger capacity.

[Means to solve the problem]

In order to achieve the above object, the present invention decided to reconsider the conventional contact current collector. The current Shinkansen is 25
It travels at 0 km/h and takes in electricity through arc current collection using a pantograph, but this speed is almost the upper limit determined by the lifespan of the pantograph current collection. Magnetic levitation train is 50
Although pantograph current collection is expected to be impossible due to traveling at 0 km/h, the present invention provides means to reduce the relative speed of sliding.

[Effect]

As a measure to reduce the relative speed, for example, an intermediate rotating body is installed between the ground conductor and the onboard collector, so that the rotating body rolls without slipping against the ground conductor, while the rotating body and the collector In between, the relative speed is lowered by taking advantage of the fact that the circumferential speed of the rotating body changes depending on its diameter. Alternatively, the intermediate rotating body rotates so that its circumferential speed is half of the train running speed, and as a result, the relative sliding speed between the overhead wire and the rotating body and between the rotating body and the collector becomes 250 km/h or less,
The current collector is on the shoulder.

〔Example〕

Hereinafter, an embodiment of the present invention, a case of a magnetically levitated train, will be described. FIG. 1 is a diagram showing an example of a contact current collector of the present invention. FIG. 1 is divided into a front view (a) and a side view (b). Further, FIG. 2 shows the mounting position of the main collector 1 on the cross-sectional view of the magnetically levitated train. In FIG. 2, a collector 1 is installed inside a bogie structure 2 of a train, and is in contact with two current collector rails 4 installed on a track structure 3 on the ground side.

Returning to Figure 1, first in the side view (b), the current collector is 2
The rotating drum 5 and the bogie frame 6 that supports it are attached to the train body, and are made up of air springs 7 that press the current collector against the current collector rail 4. The air spring 7 also has the purpose of electrically connecting the train body and the current collector, and is made of a material such as synthetic resin or synthetic rubber. The current collecting rail 4 is also installed via an insulator 8 for electrical insulation from the ground. By providing two rotating drums 5 at the front and the rear, and supporting the center with an air spring 7, vibration of the drum due to the installation tolerance of the current collection rail 4 and disconnection due to separation of the drum and the rail due to the vibration are avoided. This makes it possible to reduce the frequency of

Shifting to the front view (a) of FIG. 1, the rotating drum 5 is electrically insulated from side to side with an insulating spacer 9 interposed therebetween. For example, polyimide resin is used for the spacer in order to provide strength. The subshafts protruding left and right from the rotating drum 5 are
It is fixed to the truck frame 6 by a bearing bearing 10,
Furthermore, a current collector shoe 11 is installed on the outside thereof. The current collector shoe 11 has a structure in which the brush 12 is pressed down in the axial direction by a spring 13.

It should be noted that a design in which power is taken directly from the bearing portion 10 without providing the current collector shoe 11 can be considered, but this may cause seizing of the ball bearing or deterioration of the lubricating oil.

The current collecting rail 4 is installed in a zigzag pattern so as to sweep all over the surface of the rotating drum 5.

The rotating drum 5 is pressed down by the air spring 7, but the force may be such that the drum does not float off the rail depending on the tolerance of the installation height of the rail. The drum and truck frame are made of as light a material as possible, such as an aluminum alloy, and if the rail height tolerance is a few mm, it is thought that the pressing force should be about 0.5 per collector set.

Since the weight of the entire vehicle is approximately 30 tons, it does not affect the overall floating blade balance.

This pressing force causes the rotating drum 5 to roll on the rail without slipping, and current collection is performed without sliding. If the ratio of the diameter of the rotating drum 5 to the effective diameter of the current collecting shoe 11 is designed to be 1/5 to 1/10, the relative sliding speed of the current collecting brush 12 will be 500 m
50-1100k/h when running at km/h rating
This is within the range that allows sufficient sliding current collection.

Assuming that a train runs with 16 cars and each car consumes 60 kW of current, the total power requirement is 960 kW. If the current collection voltage is set to 1500V DC, which is the same as the conventional line, and two collectors are installed, one in the first car and one in the last car, the current passing through each current collection drum will be 160A. These numerical values are fully achievable with current power transmission and collection technologies.

Although the present invention has been described with reference to FIGS. 1 and 2 regarding the method of installing the current collection rail on the ground, a method of installing it on the side wall as shown in FIG. 3 is also possible based on the same idea. In this case, since the train body fluctuates on the order of several centimeters vertically and horizontally with respect to the guideway 14 depending on the running speed and the curve, a mechanism is provided to follow this.

FIG. 4 is a diagram showing another embodiment of the present invention.

In this embodiment, two rotary drums 5A and 5B each having a built-in motor and capable of rotating are connected.

The rotating drum 5A is in contact with the ground current collection rail 4, and the motor is controlled so that the circumferential speed of the drum becomes 2/3 of the train running speed V. The rotating drum 5B is in contact with the drum 5A and the current collector shoe 11, and is rotated at a circumferential speed of V/3. Therefore, the rail 4 and the drum 5A, the drums 5A-B, and the drum 5B and the current collector shoe 11 are all sliding at a relative speed of V/3. For example, V = 500 km
/h, the sliding speed of each part is lowered to 166 km/h, which is a speed that allows contact current collection. Fourth
In the figure, in order to improve followability to the ground rail,
It is an arm mechanism having a spring 15.

It also includes a spring mechanism 16 for pressing the rotating drum 5B against the drum 5A, and a spring mechanism 17 for pressing the current collector shoe 11 against the drum 5B. Also,
Insulating insulator 1 for attaching these parts to the train body
It has 8.

The structure of the motor for imparting rotation to the rotating drums 5A-B is, for example, an induction motor as shown in FIG. That is, the outer rotating conductor is a squirrel cage rotor 18, and the inside is a stator having an excitation coil 19. A three-phase AC conductor 2o for power supply is taken out from the inner shaft and connected to the on-board mold [22] via a lance 21. In the on-board power supply, the three-phase AC frequency can be controlled using an inverter, etc., and the circumferential speed of the rotating drum can be changed in accordance with the train running speed.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a train that does not cause a reduction in passenger capacity unlike a power-supply vehicle. Furthermore, it is possible to provide a train that stably supplies power without causing a decrease in reliability due to loss of power during an emergency stop in the non-contact current collection system. moreover.

Since the suppliable power capacity can be easily increased, saving on the capacity of the refrigerator for superconducting coils can be eased, and system design can be facilitated.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the present invention, FIG. 2 is a diagram showing the mounting structure of the current collector of the present invention, FIG. 3 is a diagram showing another embodiment of the present invention, and FIG. FIG. 5 is a diagram showing another embodiment of the present invention, and FIG. 5 is a diagram showing details of the embodiment. DESCRIPTION OF SYMBOLS 1... Current collector, 2... Dolly, 4... Current collecting rail, 5... Rotating drum, 6... Dolly frame, 7... Air spring. 8... Insulator. 9... Spacer, 11... Current collector shoe Figure 2 Figure 3 Figure 1 Figure 4 Figure 5 AIB

Claims (1)

[Scope of Claims] 1. In a train that is supplied with electric power from a power supply line laid along a running route of the train via a contact type current collector mounted on the train, the contact type current collector is provided with the A train characterized by being provided with means for reducing relative speed to a power supply line. 2. In a train that is supplied with electric power from a power supply line laid along the train's running route via a contact type current collector mounted on the train, the rotating contact type current collector comes into contact with the power supply line. A train, characterized in that it is provided with means for decelerating the amount of movement of the body and the outer periphery of the rotating body and transmitting the same to a collector on the train side. 3. A contact type current collector for supplying electric power to a train from a power supply line laid along a running route of a train, characterized in that a means for reducing the relative speed with respect to the power supply line is provided. Electrical equipment. 4. In a contact type current collector that supplies power to a train from a power supply line laid along a train running route, the rotating body that comes into contact with the power supply line and the amount of movement of the outer periphery of the rotary body are decelerated to reduce the speed of the train. A contact type current collector characterized by being provided with a means for transmitting information to a side collector.