Precision bearings according to ISO grading standards are divided into: P0, P6, P5, P4, P2. Rank higher in turn, where P0 is the general accuracy, other grades are precision level. Of course, different classification standards, different types of bearings, their classification method somewhat different, but the meaning is to the. The use of performance requirements of precision bearings rotating body with high runout accuracy, high-speed rotation and small changes in friction and friction.
2013年8月15日星期四
Circulating pump motor bearing temperature measuring point oil spill handling skills
The following describes a simple, effective, and very reliable solve circulating pump motor bearing temperature measuring point spill way, condensate pumps, circulating pump motor ZYS Precision Bearings temperature measuring point on oil spills, oil leakage problem shown. The original temperature measuring point lead is drawn through the terminal, resulting in leakage problem, although you can take a lot of provisional measures, but not fundamentally solve the long-term oil spills, oil leakage problem. If the terminal transformed into welded stainless steel pipe threading, threading its internal piercing, because the outlet conduit is relatively high in any case it is impossible before the advent of oil spills, oil leakage situation. Condensate pump, circulating pump motor bearing temperature measuring point after the transformation after a year in the event of a test run without oil spills, oil leakage phenomenonMany different types of rolling bearings, the choice may consider the following factors, which to choose.
1. Payload size, direction and nature: ball bearings suitable for light load to bear, roller bearings suitable for heavy load and impact load. When subjected to pure axial load bearing, thrust bearing is generally used; when rolling under pure radial load, generally used in deep groove ball bearings or cylindrical roller bearings; when rolling under pure radial load at the same time, there is little axial load, the choice of deep groove ball bearings, angular contact ball bearings, tapered roller bearings and self-aligning ball or spherical roller bearings; when the axial load is large, the choice of the contact angle larger angular contact ball bearings and tapered roller bearings, or use radial bearings and thrust bearings together, which in very high axial loads or special requests, especially when there are large axial rigidity adapt appropriate.
2. Permissible speed: Due to different types of bearings are very different. Generally, the friction is small, less heat bearing suitable for high speeds. Rolling in the design should strive to lower the speed limit working conditions.
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