Jiaozuo brake

Train track unit brake TZD-1 tread brake DZD-1 track unit brake TZD-1-840-T-X tread brake

1. TZD series, TZD series tread brake, is an integrated brake shoe tread brake that integrates brake cylinder, brake shoe stroke adjustment mechanism, brake shoe anti eccentric wear mechanism, and brake force amplification mechanism. It is used nationwide. Models: TZD-1-1050, TZD-1-840, TZD-1-660, TZD-1-710, etc., are brakes used in conjunction with railway vehicles. It has the characteristics of easy installation and maintenance, sensitive operation, and long service life. TZD-2 is a parking brake with manual release function, while TZD-3 is a brake with manual assisted braking.

2. DZD series and DZD series unit brakes are used for Internal combustion locomotive brakes and are used in China. Model: DZD-1, DZD-2, DZD-3

3. TTD series, TTD series brakes are heavy-duty, anti eccentric wear brakes developed in the TZD series tread brakes. Model: TTD-1, TTD-2, TTD-3

4. The DT series brake is a heavy-duty and anti eccentric wear brake developed on the basis of the DZD series tread brake. Models: DT-1, DT-2, DT-3

Unit 1

2、 Brake shoe

A brake shoe is a shoe shaped brake block made of cast iron or other materials, which holds the wheel tread tightly during braking and stops the wheel from rotating through friction.

Train brake shoes (synthetic brake shoes, composite brake shoes, high friction and low friction brake shoes)

（1） Overview of Train Brake Shoe

In railway terminology, brake pads are called brake shoes, which are located on the tread of the wheels. When braking, the two brake shoes at the front and rear of the wheels clamp the wheels tightly through the action of the brake pedal, achieving the purpose of stopping. During the operation of a train, braking is required to generate friction in contact with the wheel tread, which converts the kinetic energy of the train into thermal energy and dissipates it into the atmosphere, achieving deceleration or stopping of the train. The braking component that directly rubs the wheels to stop the train is the brake shoe. A tile shaped brake block made of cast iron or other materials that holds the wheel tread tightly during braking and stops the wheel from rotating through friction.

In the era of high-tech development, trains, as one of the main modes of transportation, make us increasingly demanding for their safety. Due to the harsh operating environment of trains, the safety of their braking system is particularly important. Among them, the friction performance of train brake pads plays a crucial role in relation to driving safety and operational reliability. At present, China's brake pad detection technology is relatively backward, with low work efficiency and the inability to quickly and accurately grasp the status of tires, which seriously restricts the acceleration of railway vehicles in China. The testing methods used abroad are expensive and technically challenging. Transplantation has never been seen in China. So the quality of brake pads has become the top priority for the survival of enterprises. The braking device is an important device for safe deceleration or parking of trains. For the safety of trains, the braking performance of trains must be ensured under various conditions. With the continuous improvement of train operation speed, the requirements for braking performance of braking devices are also higher, and traditional brake shoe braking cannot adapt to the development of high-speed trains. At present, the Passenger railroad car in our country basically adopt the disc brake, and the train brake pad is an important component of the disc brake device, which plays an important role in braking performance. The train brake pad testing system is based on the brake pad braking experimental platform, which tests the friction performance of train brake pads. The train brake pad testing system tests multiple performance parameters such as bearing pressure, surface temperature, and wheel running speed of the brake pads through assembly experiments. The brake pads of train disc brakes mainly use synthetic brake pads. The characteristics of synthetic brake pads are:

1. Good thermal stability. The resin decomposition temperature is high, and the actual measured temperature is 377 degrees Celsius.

2. Low compression elasticity, low noise, and uniform temperature distribution.

3. Strong adhesion, with both resin aging resistance and rubber toughness, low heat decay rate, and good recovery.

4. Good production performance and good surface reproducibility.