The centrifuge's own anti-unbalance ability can not only improve the robustness of the centrifuge, but also eliminate the need for strict balance and even visual balance due to the operation of the rotary head, thus facilitating the user's operation. Generally, a small centrifuge places the whole motor on a seismic elastic bracket, such as a rubber mat. The high-speed low-temperature centrifuge also often uses a sturdy shaft to resist earthquakes. Since the wall thickness of the drum designed in the current design has met the strength requirement and has a large safety margin, the finite element method is used to optimize the drum from the viewpoint of cost saving, and under the premise of ensuring strength and rigidity, The wall thickness of the drum is gradually reduced, and the influence of the wall thickness parameter on the stress SINT and the radial displacement DZ is observed.
The purification accuracy of the centrifuge is limited by the rotor speed, and the bearing capacity of the bearing is a bottleneck condition for selecting high-performance power drive equipment. Due to the limited bearing capacity of the traditional rolling bearing, the rotor system of the centrifuge can reach higher speed. Replacing the traditional rolling bearing with permanent magnet bearing is a research potential method to solve this problem.
Centrifugal rotor spindle system supported by permanent magnet bearings. The structure of the permanent magnet bearing is designed according to the literature and has a bidirectional action of radial and thrust. According to the current research on magnetic materials at home and abroad, the stator and rotor materials of permanent magnet bearings Select rare earth neodymium iron boron (NeFeB) high strength permanent magnet material.
