Writer: admin Time:2021-03-27 09:25 Browse:℃
The market requirements of all kinds of mechanical devices and instruments using rolling bearings are increasingly strict, and the conditions and performances required for bearings are increasingly diversified. In order to select the most suitable bearing from a large number of structures and sizes, it needs to be studied from various angles. When selecting bearings, generally, the bearing structure is determined by the arrangement, installation and disassembly of bearings as shafting, the allowable space, size and market of bearings. Secondly, the bearing size is determined by comparing the design life and durability limit of various machines using bearings. When choosing bearings, the fatigue life of bearings is often considered only, and the life, wear and noise of lubricating grease caused by the aging of lubricating grease also need to be fully studied. Moreover, according to different purposes, it is necessary to select bearings with special design requirements for accuracy, clearance, cage structure, grease, etc. However, there is no certain order and rule in selecting bearings. The priority should be given to the conditions, performance and the most relevant matters required by bearings, which is especially practical.
○ required conditions and performance of bearings
○ service conditions, environmental conditions
All dimensions of bearing installation part
○ space allowed for bearings
Load size and direction
○ vibration and impact
Rotation speed, limit speed of bearing
○ inclination of inner and outer rings
Fixation in axial direction and bearing alignment
The difficulty of loading and unloading
○ noise, torque
○ rigidity
Market and economy
Determine bearing structure and arrangement
Service machinery and design life
○ equivalent dynamic load or equivalent static load
Rotation speed
○ allowable static load factor
Allowable axial load (in case of cylindrical roller bearing)
Determine bearing size
○ accuracy of rotary pendulum
High speed rotation
○ torque variation
Determine bearing accuracy class
○ coordination
Temperature difference between inner ring and outer ring
Rotation speed
○ inclination of inner and outer rings
○ preload
Determine (internal) clearance
Rotation speed
○ noise
Use temperature
Determine cage shape and material
Use temperature
Rotation speed
○ lubrication method
Sealing method
Maintenance
Determine lubrication method, lubricant and sealing method
○ loading and unloading sequence
Tool card mold
Installation related dimensions
Determine dimensions related to installation
Determine handling method
Bearing and parts around the bearing
Final specification
Changzhou HuanNing Bearing Co., Ltd
Address: NiuTang Town, Changzhou City, Jiangsu Province, P.R. 213168,China
Tel: 0086-519-88521389
Fax:0086-519-88527389
Mobile Phone:+86-18761171389
Linkman: Mr. LEE
E-mail: czhn@czhnzc.com
Linkman: Mr. LEE
Phone: 18761171389
Tel: 0519-88521389
Email: czhn@czhnzc.com
Add: No.5, road 5, Luxi Industrial Park, Niutang Town, Wujin District, Changzhou City