Characteristics and classification of NSK magnetic bearings

Magnetic bearings are a new type of bearing. The specific information is not very detailed at the moment. Today, we will introduce the characteristics and classification of magnetic NSK bearings. A magnetic bearing is a form of support that supports a load or a suspended rotor by magnetic force. In recent years, such bearings have developed rapidly, especially in high speed, low friction, high (low) temperature and vacuum applications. Compared to other forms of support, magnetic bearings have unique advantages and are promising.
First, characteristics and classification
1. Features 1. Low friction, low power consumption, and ultra-high speed operation. 2, the bearing precision is high, the operation is stable and reliable. 3 can be operated in high temperature, deep cold and vacuum environment. 4 The structure is complex, demanding, and has magnetic interference to the environment, but no other pollution.
2. Classification magnetic bearings are classified according to their control methods, magnetic energy and structural forms. In addition, according to the type of magnetic field can be divided into permanent magnet type, electromagnetic type and permanent magnet - electromagnetic hybrid type. Depending on the type of bearing suspension force, it can also be divided into suction and repellent. Superconducting magnetic bearings are also classified into low temperature superconducting and high temperature superconducting. There are some special restrictions between the different types in the above categories, so special attention should be paid. 1 permanent magnet type bearing can only be passive (passive type), while passive type bearing is impossible
3. It is stable in all directions and at least one direction should be active. 2 DC excitation bearings can only be effective (effective). 3 pure electromagnet bearings can only be 5 degrees of freedom control type bearings, their volume, quality and power consumption are relatively large. 4 Repelling magnetic bearings, due to the low magnetic susceptibility, the structure is more attractive than the suction type and is rarely used.