Brake shoe: device and characteristics

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

It is often necessary to sort wagons at stations and railway junctions. The carriages are driven by a diesel locomotive or an electric locomotive. Sometimes, for acceleration, the car is not brought to its place, but is pushed after uncoupling. Thus, the car rolls on its own. In order for it to stop where it is needed, or to prevent a blow to a peacefully standing train, the car must be delayed. To do this, use the brake shoe. At the sorting yards of the railways, the train and wagons are placed on an inclined section or pushed with the help of a diesel locomotive. Then the cars are installed separately or in groups on the desired tracks.

In order to install this device, you need to use a special accessory. This is the so-called fork. With its help, it is possible to carry out work on the braking of the cutter carts as safely as possible. A fork is also needed to remove the brake shoe from under the wheels.

Notthis part must be subjected to any mechanical stress. So, it is not recommended to install shoes under the wheels with a sledgehammer. When using a special plug, it should be installed only when the train or wagons have completely stopped.

Brake shoe for wagon: working principle

The principle of operation of this device is to replace the rolling friction of the wagon with sliding friction. This phenomenon is called the railroad skid.

The length of this yuz depends on a variety of factors. For example, on how smooth the surface of the rail and shoe is. The mass of the train, the wagon, as well as the load on the axles of the wagon is important. You also need to take into account the speed with which the railway car enters the brake shoe. This also includes weather conditions.

How to install the shoe?

There are two ways to do this. Professional railroad workers distinguish between manual and mechanized.

When the wheel pair of the car rests against the head of the shoe, and then slides along the rails, the resistance to movement increases. The speed of the train or wagon will slow down. Here you can put the device on the rails with your hands or using a fork.

To avoid accidents, especially when working at high speeds, railway workers use a mechanized brake shoe. Its difference from the usual one is that the installation and removal is carried out using various devices with a mechanical or electric drive. This drive, as it were, pushes the shoeon the path where the train will pass. To do this, use a cable.

Braking of wagons from a centralized post

This is one of the most popular braking methods. Shoes are used here, which can move in special grooves. The shoe moves along the guides with the help of cables in the opposite direction from the movement of the car. The shoe brakes the wheel pairs and with the help of the same wheels is retracted to its original position.

Sometimes this mechanical shoe control can be done with pedals.

Here, before starting to brake, it automatically extends towards the cutter. When the car hits the pedal, the engine will move the shoe in the direction in which the car is moving. The speed with which the brake shoe will stop the car is proportional to the speed with which it was moving at the time of the meeting.

Types of shoes

These devices differ in how they are installed and removed. Distinguish between manual and mechanical devices.

For example, mechanical systems are distinguished by the fact that their installation or removal is carried out only with the help of special mechanisms. Such shoes, in turn, are divided into mortise and non-mortise.

You can also note the releasing brake shoe. This is a special type of device that is designed to overturn the train when it moves unauthorized.

Shoe specifications

Manually operated wheel drop shoes are more of a safety feature. Suchdevices are designed to forcibly throw trains off the rails. They are used where various accidents are possible.

The wheel chock is mounted only after a complete stop. To ensure that the fastening with brake shoes does not cause sparks in the event of braking, the devices are made of aluminum or brass alloys.

The knurling element is cast from steel alloys.

Shoes are left and right.