Zhejiang Waxing Electromechanical Co., Ltd is one of the most professional manufacturers and suppliers of hybrid ceramic 608 6001ce-2ls bearing in China. Welcome to buy high quality customized bearings made in China here from our factory. For price consultation, contact us.
Products Description
1. What is an insulated bearing?
The so-called insulating bearing refers to the general term that can block the passage of current, and the bearing itself has insulating properties. Its insulation performance is usually guaranteed by coating a layer of insulating material on the outer or inner ring of the bearing through a special process, or its rolling elements are made of ceramics. The name and code of the insulated bearing adopt the international bearing code. The code name of the outer ring insulated bearing is vl0241, and the code name of the inner ring insulated bearing is vl2071.
Second, the advantages of insulating bearings
1. Inner or outer ring coating
Insulated bearings adopt a special spraying process to spray high-quality coatings on the outer surface of the bearings. The coating has strong adhesion to the substrate and good insulation performance, which can avoid the electric corrosion of the bearing caused by the induced current, prevent the current from damaging the grease, rolling elements and raceways, and improve the service life of the bearing. The process is continuously improved. In insulated bearings, the surface of the outer or inner ring has a 100μm thick coating that can withstand voltages up to 1000V DC. The special spraying process can form a coating with uniform thickness and strong adhesion, which can be further processed to prevent moisture and moisture.
2. Avoid damage
Insulated bearings prevent damage from galvanic corrosion. Therefore, they ensure more reliable operation of the motor than ordinary bearings. It is more cost-effective and reliable than other insulation methods such as shaft or housing insulation. The dimensions and basic technical characteristics of insulated bearings are the same as those of non-insulated bearings, and they are 100% interchangeable. Suitable for electric motors and generators, especially variable frequency motors.
3. Ceramic rolling elements
This kind of bearing adopts ceramic rolling elements (balls or rollers) made of Si3N4 material; it has excellent insulation performance, and its capacitance is basically 40pf, and its insulation performance is better than that of coated bearings. At high temperature, its DC resistance can also reach the range of G ohms, which has good insulation performance; ceramic rolling elements have excellent wear resistance and low requirements for lubrication. It is especially suitable for high-speed, low-friction, and low-temperature operation; it operates well under dry friction conditions; for small rolling bearings, ceramic rolling element insulated bearings have good economic performance.
3. Classification of insulating bearings
The main categories of electrically insulated bearing products are: electrically insulated deep groove ball bearings, electrically insulated angular contact ball bearings, electrically insulated cylindrical roller bearings, oxide-coated inner or outer ring insulated bearings and hybrids of electrically insulated ceramic rolling elements bearings.
1. Under what circumstances should electrically insulating bearings be used?
Even if the production of the motor is strictly controlled during the manufacturing process, it is difficult to completely avoid the magnetic asymmetry of the armature and rotor. This asymmetry creates a voltage between the stators, which creates a current through the bearings, especially in AC motors. This current will cause damage such as corrosion pits, melting marks, electric corrosion file lines, discoloration, and wear on the surface of the bearing raceway and rolling elements. Of course, this phenomenon will also appear on motors that use frequency conversion and frequency conversion technology. In order to block the current flowing through the bearing, it is necessary to cut off its circuit, so insulated bearings and insulated bearing chambers came into being.
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