LED MR16 Spot Light,Dimmable Led Spotlights,Indoor LED Spotlights,Indoor LED Spot Light Foshan Extrlux Co., Ltd. , https://www.extrlux.comThe Principle of Bearing Heaters
When mounting bearings or annular components of a bearing system, heating is often required to make the process easier. This is especially true for larger bearings that are difficult to push onto a shaft or into a housing. Proper heating ensures smooth installation and prevents damage during the process.
The principle behind induction heating is similar to that of a transformer. It involves a primary coil with many turns and a secondary coil with fewer turns, both wound around the same core. The voltage ratio between the input and output corresponds to the ratio of the number of turns in the coils, while the energy remains constant. As a result, the secondary coil experiences a high current at low voltage, which generates significant heat.
In the case of an induction bearing heater, the bearing acts as a single-turn short-circuited secondary coil. When a large current flows through it under low voltage, the bearing heats up quickly. The heater itself and the yoke remain at normal temperatures. However, this method induces a magnetic field, which can magnetize the bearing. To avoid future issues, such as attracting metal chips during operation, all induction heaters come with a built-in demagnetization function.
The temperature difference between the bearing and the housing depends on the level of interference fit and the size of the bearing. Normally, the bearing should be heated to 80–90°C (144–162°F) higher than the shaft. However, the maximum allowable temperature is 125°C (257°F), as exceeding this can cause metallurgical changes, altering the bearing’s dimensions or hardness. Overheating must be avoided, and open flames should never be used. Always wear protective gloves when handling heated bearings and use lifting equipment to ensure safe installation.
Induction bearing heaters from Yangzi feature adjustable thermostats and hot plates, making them suitable for most standard applications. These devices offer precise control and efficient heating, ensuring optimal performance.
Why Use an Induction Bearing Heater?
Inductive heating is a fast, precise, and safe method compared to traditional techniques like oil baths, torches, or electric ovens. It avoids harmful emissions, oil residues, and health risks. This makes it an environmentally friendly and efficient choice for industrial applications.
Induction heaters are widely used for heating various components, including bearings, gears, bushings, and connectors. Using the correct device can significantly extend the life of bearings and reduce mechanical stress. Controllable induction heating ensures safety, maintains the original surface finish, and is ideal for sealed bearing systems.
Safety and Control
Bearing heaters, gear heaters, induction disassemblers, and ring gear heaters all operate on the principle of electromagnetic induction. During the heating process, microprocessor-based controls optimize power delivery, ensuring even heating and faster results. There is no need for complex procedures, and the process is free from explosions, discoloration, or distortion.
Electric induction heaters are known for their reliability, durability, and ease of use. They are equipped with effective cooling systems and long-lasting electronic components, making them suitable for continuous operation in industrial settings.
Advantages of Electric Induction Heaters:
1. Designed for industrial environments.
2. Microelectronic controls prevent overheating and damage.
3. Easy-to-use rotating arm for convenience.
4. Electronic components have a three-year shelf life.
5. Free repair service available.
6. Suitable for continuous operation.
7. Active demagnetization function.
8. Power conditioning for stable performance.
9. Wide range of sizes and models.
10. Complies with IEC (International Electrotechnical Commission) standards.
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Bearing heater principle
Source: Bearing Network | Date: April 7, 2013