Jiaozuo brake

Electromagnetic brake is an important component of mechanical manufacturing in terms of physics, playing a crucial role in the overall engineering. Electromagnetic brakes are mainly used for mechanical packaging in the mechanical industry, which has brought many conveniences to the construction industry and greatly changed people's lives. But in order for the work to proceed smoothly, we still need to know many questions.

The method to accelerate the operation of electromagnetic clutch is to add a lot of lubricant to many parts and adjust its normal value, and also increase its suction force, which can accelerate its operation speed. Ensure the normal progress of work, so that we can gain more benefits.

Electromagnetic brakes are used for mechanical packaging or packaging, for example, if a manufacturer only produces products and is not very proficient in packaging, then we can start working with electromagnetic brakes to complete this arduous and glorious task. A new type of electromagnetic brake. Compared with the old brake, it greatly reduces the consumption of coils and enameled wires, thereby reducing costs. It has also made improvements in structure and technology, and is currently used in YJ200 traction machines and gradually promoted in other models.

The structure of the new electromagnetic brake is shown in Figure 1, with the fixed iron core and coil in a symmetrical structure. Two top rods are used to open the brake arms on both sides. The power supply voltage for the brake is 110V DC, and when the power is cut off, the traction machine is in the braking state; When powered on, the stationary iron cores on the left and right sides are simultaneously engaged, and the braking mechanism of the traction machine is opened through two top rods. The traction machine is in working condition. The stationary iron core is made of industrial pure iron or low-carbon steel, and the brake housing material is cast aluminum ZL106, effectively solving the problem of residual magnetism caused by the old brake base, ensuring that the brake time lag is within a reasonable range, and reducing the cost by about 30%. It is mainly matched with series motors. The brake for electromagnetic effect braking can be divided into electromagnetic powder brake, electromagnetic eddy current brake, electromagnetic friction brake and other forms

① Electromagnetic powder brake: When the excitation coil is energized, a magnetic field is formed, and the magnetic powder is magnetized under the action of the magnetic field, forming a magnetic powder chain, which aggregates between the fixed magnetic conductor and the rotor. Braking is achieved by the binding force and friction force of the magnetic powder. When the excitation current disappears, the magnetic powder is in a free and loose state, and the braking effect is relieved. This type of brake has small volume, light weight, low excitation power, and the braking torque is independent of the rotational speed of the rotating parts. However, magnetic particles can cause component wear. It is convenient for automatic control and suitable for driving systems of various machines. It is widely used in metallurgy, construction, chemical, food, machine tools, stages, elevators, ships, packaging and other machinery, as well as in situations such as braking in case of power outage (risk prevention).

The resistance torque that must be applied to stop or decelerate the mechanical operating components is called the braking torque. The braking torque is the basis for designing and selecting brakes, and its size is determined by the mechanical type and working requirements. The performance of the friction materials (brake components) used on the brake directly affects the braking process, and the main factors affecting its performance are the working temperature and temperature rise rate. Friction materials should have high and stable friction coefficients and good wear resistance. Friction materials are divided into two categories: metallic and non-metallic. The former commonly used include cast iron, steel, bronze, and powder metallurgy friction materials, while the latter includes leather, rubber, wood, and asbestos

In order to ensure the uninterrupted operation of the electromagnetic brake, it is necessary to regularly maintain and maintain it:

1. Frequently add lubricant to the movable part of the electromagnetic brake.

2. Regularly check the length of the armature stroke. Because during the operation of the brake, the travel length of the armature will increase due to wear on the moving surface. When the length of the armature stroke cannot reach the normal value, adjustments must be made to restore the small gap between the brake surface and the rotary table. If the stroke length of the armature increases above the normal value, it may greatly reduce the suction force.

3. If the worn brake surface is replaced, the small gap between the brake surface and the rotary table should be adjusted appropriately.

4. Regularly check the tightness of the bolts, especially tightening the bolts of the electromagnet, the bolts of the electromagnet and the shell, the bolts of the magnetic yoke, the bolts of the electromagnet coil, and the wiring bolts.

5. Regularly inspect the mechanical wear of movable components and remove dust, burrs, and dirt from the surface of electromagnetic components