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Train braking apparatus and train braking method

A braking device, a technology for trains, applied in the direction of brakes, operating mechanisms of railway vehicle brakes, braking components, etc., can solve the problems of deceleration fluctuations, inability to obtain braking force, friction coefficient differences, etc., and achieve the effect of deceleration stability.

Active Publication Date: 2011-04-06
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the train braking device disclosed in Patent Document 1, since the coefficient of friction is changed for each braking step, there is a problem that the variation in deceleration is large.
In addition, since the change over the years of the brake shoes is not taken into account, there is a problem that, when the replacement time of each brake shoe is different, the value of the friction coefficient of each brake shoe is different, and a stable braking force cannot be obtained.

Method used

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  • Train braking apparatus and train braking method
  • Train braking apparatus and train braking method
  • Train braking apparatus and train braking method

Examples

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Comparison scheme
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Embodiment approach 1

[0045] figure 1 It is a figure which shows an example of the structure of the train brake apparatus concerning Embodiment 1. figure 1 The shown train brake device 11 adopts the following structure: as the main components, it has a speed sensor 1, a brake instruction unit 2, an air brake control unit 3, an electropneumatic switching valve 4, a relay valve 5, a pressure sensor 6, Brake cylinder 7, brake shoe 8, wheel 10, and total air cylinder 12.

[0046] The speed sensor 1 is installed on the front and rear bogies of each vehicle (4 in total), and can acquire the speed signal 1D of each wheel 10 . The speed input unit 2 can acquire a speed signal 1D from the speed sensor 1a to the speed sensor 1d of each vehicle.

[0047] The brake command unit 2 can output a brake command 2D for obtaining a predetermined deceleration. The air brake control unit 3 receives the brake command 2D sent from the brake command unit 2, and a load compensation signal sent from a load compensation d...

Embodiment approach 2

[0069] The train braking device 11 according to the second embodiment has a structure that can reduce the difference in the friction coefficient 23 due to the difference in the use time of the brake shoe 8, and can obtain stable deceleration. In addition, the structure of the train braking device 11 is the same as that in Embodiment 1. figure 1 and figure 2 The structure shown is the same.

[0070] Here, the braking force can be obtained from the product of the brake cylinder pressure 5D and the friction coefficient 23 as described above. Here, the replacement cycle of the brake shoe 8 varies depending on the number of passengers and the use environment. Generally, the longer the use time, the smaller the value of the friction coefficient 23 of the brake shoe 8 . That is, the value of the friction coefficient 23 of the brake shoe 8 whose replacement time is early and whose traveling distance (use time) is long shows a lower value than that of the brake shoe 8 whose replacem...

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Abstract

A train braking apparatus includes a pneumatic brake control part (3) for storing a plurality of friction coefficients corresponding to a brake instruction (2D) and initial velocity of a brake, an electropneumatic change valve (4) for converting a pressure control signal (3D) transmitted from the control part (3) into a pneumatic signal, a relay valve (5) for generating brake cylinder pressure (5D) of a predetermined pressure corresponding to the pneumatic signal, and a brake cylinder (7) for controlling each brake shoe (8) according to the brake cylinder pressure (5D). The pneumatic brake control part (3) generates the pressure control signal (3D) based on a friction coefficient corresponding to the brake instruction (2D) and the initial velocity of the brake.

Description

technical field [0001] The invention relates to a train braking device and a train braking method. Background technique [0002] The train brake device with air brake control unit adopts the following structure: according to the brake instruction and the train speed, a pressure control signal is generated, the relay valve outputs the brake cylinder pressure corresponding to the pressure control signal, and the brake cylinder pressure acts On the brake shoe, so as to obtain the predetermined braking force. This braking force is obtained from the product of the brake cylinder pressure and the friction coefficient of the brake shoe. The value of this friction coefficient has the following properties: it changes in the region where the train travels at a low speed, and also changes according to the use time of the brake shoe. change. That is, in order to obtain a stable braking force, a train braking device capable of appropriately controlling the brake cylinder pressure in ac...

Claims

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Application Information

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IPC IPC(8): B60T8/176B60T8/17B61H13/00
CPCB60T17/228B60T13/665B60T8/1705B60T13/36B60T13/68B61H11/06
Inventor 板野康晴
Owner MITSUBISHI ELECTRIC CORP
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