Permanent magnet suspending stirrer for high-temperature heavy load working condition

Abstract

The invention provides a permanent magnet suspending stirrer for a high-temperature heavy load working condition, which comprises a driving device, a stirring axis structure, a stirring kettle and a permanent magnet suspending component; the stirring kettle comprises a stirring kettle body, an upper cover plate of the stirring kettle fixed at the upper end opening of the stirring kettle body, anda lower cover plate of the stirring kettle fixed at the lower end opening of the stirring kettle body; the stirring axis structure comprises a bearing base and a stirring axis; the bearing base is fixed at the upper part of the upper cover plate of the stirring kettle, the upper and lower ends of the stirring axis are supported at the inner part of the bearing base and the center hole of the lowercover plate of the stirring kettle through a roil bearing I and a roll bearing II; the upper end of the stirring axis is fixed with a lower connecting flange fixedly connected with the driving device, and the permanent magnet suspending component is arranged between the lower connecting flange and an outer step plate of the bearing base. The stirring axis structure can realize non-contact suspending location axially through mutually exclusive magnetic force of the permanent magnet suspending component, and adopts roll bearing location on a radical direction; thus the problems of quick wear ofaxis shoulder end face of the existing device, big resistance torque, and need of big power motor, and others are solved.

Description

technical field [0001] The invention belongs to the technical field of stirrers, and in particular relates to a permanent magnetic levitation stirrer used in high-temperature and heavy-load working conditions. Background technique [0002] Many processing techniques in nuclear power, petrochemical and pharmaceutical industries require agitators to operate under conditions of high temperature, heavy load, and dry friction of bearings. Due to the harsh operating conditions, this kind of agitator for high-temperature and heavy-duty working conditions cannot be manufactured by domestic companies at present, and can only rely on imports, and imported agitators also have short service life, high failure rate, expensive, High after-sales service costs and many other deficiencies. The main technical features of the imported agitator for high-temperature and heavy-duty working conditions are: 1. The radial positioning of the stirring shaft adopts the sliding bearing method, which is...

AI Technical Summary

Problems solved by technology

On the one hand, this huge sliding friction increases the stirring resistance torque, on the other hand, it accelerates the wear of the contact surface of the sliding thrust bearing, which causes the failure of the agitator and shortens the life of the agitator; Only use equal-length studs and nuts for fastening, because there is a gap between the inner diameter of the cover plate hole and the outer diameter of the equal-length studs, when the stirred tank is running at high temperature, it is very easy to misalign the center hole of the upper and lower cover plates. The stirring shaft system is tilted, resulting in uneven contact of the sliding bearing contact surface, which leads to contact surface wear and agitator failure; fourth, the wear-resistant coating itself has limited ability to adapt to high temperature and heavy load conditions. After a certain period of operation, it will Gradually thinning, or even falling off, leading to failure of sliding bearings, frequent equipment failures, and shortened equipment life

In addition, the high price of imported equipment and harsh after-sales service conditions also greatly increase the process cost

Images