Jiaozuo brake

Advantages and disadvantages of electric hydraulic drum brake block brake:

The advantages and disadvantages of several drum brake block brakes introduced below can be analyzed and compared as follows.

(1) Firstly, in terms of braking efficiency, under the condition of basically the same structural parameters, the automatic booster brake is fully utilized due to its increasing effect on friction force, followed by the balanced brake with high braking efficiency and the non balanced brake with low braking efficiency. However, on the other hand, due to the unstable friction coefficient between the brake shoe and brake drum itself, It varies greatly depending on the material properties, temperature, and surface conditions of the brake drum and friction pad (such as whether they are contaminated with water, oil, etc.). The braking efficiency of an automatic booster brake is sensitive to the friction coefficient and is therefore very unstable.

(2) Block brakes and drum brakes utilize friction to varying degrees to ensure certain braking efficiency. However, in use, the stability of braking efficiency is poor due to the unstable friction coefficient.

(3) When the block brake drum brake is working, most of the heat generated by friction is transferred to the brake drum to raise its temperature. In order to reduce the temperature rise, the brake drum should have a large Heat capacity.

Drum brake:

(1) Simple Unbalanced Brake: This is a common type of hydraulic wheel brake. In this type of brake, the auxiliary shoes rely on frictional force, resulting in much greater pressure on the brake drum than the reducing shoes. To ensure uniform wear of the two shoes, the auxiliary shoes are made longer than the reducing shoes, so that the opening force acting on the shoes is equal, but the frictional torque generated is equal, thus achieving uniform wear.

(2) Balanced brake: Balanced brake has two types: unidirectional and bidirectional assistance. The unidirectional assistance balanced brake has an automatic assistance effect when each shoe is hard pressed against the brake drum, but it will become a reducing shoe when reversing, resulting in poor braking effect. Due to its large unidirectional braking torque, it is called a unidirectional balanced brake. The two front and rear brake cylinders of the two-way balance brake drive the two floating brake shoes. When braking forward, all the piston of the cylinder moves outward under the hydraulic pressure to press the two shoes against the brake drum. Under the Friction torque of the brake drum, both shoes rotate in the direction of wheel rotation until the support at the outer end of the piston of the two cylinder is pushed back to the end face of the cylinder. This brake has good contact and uniform wear, The braking efficiency is high, and most of them are used by Hyundai Motor Company.

Application:

Electric hydraulic drum brakes are widely used for deceleration and parking (maintenance) braking in various lifting and transportation, port loading and unloading, metallurgical equipment, mining machinery, and engineering machinery.

Compliant with standards

The connection dimensions and technical requirements of the YW series electric hydraulic drum brake comply with JB/T6406-2006 standard, the braking torque parameters comply with DIN15435 standard, and are equipped with ED thrusters that comply with DIN15430 standard;

main features 

1. Safe and reliable performance, smooth braking, and high action frequency;

2. The main hinge points are equipped with self-lubricating bearings, which have high transmission efficiency and long service life, and do not require lubrication during use;

3. The interlocking equal back distance device and automatic tile following device can always maintain equal back distance of both sides of the tiles without adjustment, completely avoiding the phenomenon of one side of the brake pad floating against the brake wheel due to uneven back distance;

Two types of diagrams, YWZ4 and YWZ

Drum brake:

(1) Simple Unbalanced Brake: This is a common type of hydraulic wheel brake. In this type of brake, the auxiliary shoes rely on frictional force, resulting in much greater pressure on the brake drum than the reducing shoes. To ensure uniform wear of the two shoes, the auxiliary shoes are made longer than the reducing shoes, so that the opening force acting on the shoes is equal, but the frictional torque generated is equal, thus achieving uniform wear.

(2) Balanced brake: There are two types of balanced block brakes: unidirectional and bidirectional. The unidirectional balanced brake has an automatic braking effect when each shoe is hard pressed against the brake drum, but it will become a reducing shoe when reversing, resulting in poor braking effect. Due to its large unidirectional braking torque, it is called a unidirectional balanced brake. The two front and rear brake cylinders of the two-way balance brake drive the two floating brake shoes. When braking forward, all the piston of the cylinder moves outward under the hydraulic pressure to press the two shoes against the brake drum. Under the Friction torque of the brake drum, both shoes rotate in the direction of wheel rotation until the support at the outer end of the piston of the two cylinder is pushed back to the end face of the cylinder. This brake has good contact and uniform wear, The braking efficiency is high, and most of them are used by Hyundai Motor Company.