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Design and Application of Antifriction Bearing Selection

Design and Application of Antifriction Bearing Selection
NARENDRA KUMAR GUPTA
Department of Mechanical Engineering
INDIAN INSTITUTE OF TECHNOLOGY, KANPUR

Open Design and Application of Antifriction Bearing Selection
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Abstract:

For each bearing type, a data base which contains boundary dimensions, basic load ratings, limiting speeds, mass, company name and load factors of bearings is created. Knowledge about bearing type suitability, seals, lubrication, and fits and tolerances is also stored in separate data bases. Inputs required by the system are, speed, load, reliability, service life, operating temperature, dimensional constraints and desired level of few operating conditions.

TOC

2 System Analysis
2.1 Introduction
2.2 Identification of Bearing Requirements
2.3 Factors for Identification of Possible Bearing Type(s)
2.3.1 Bearing Loads
2.3.2 Vibration and Shock load
2.3.3 R-Otational Speed
2.3.4 Available Space
2.3.5 Operating Temperature .
2.3.6 Shaft Alignment
2.3.7 Permissible Noise
2.3.8 Precision Requirements
2.3.9 Rigidity
2.3.10 Friction
2.3.11 Axial Displacement
2.3.12 Mounting and Dismounting
2.3.13 Availability and Cost
2.4 Derivation of Actual Bearing Size
2.4.1 Static Stressing
2.4.2 Dynamic Stressing
2.4.3 Admissible Axial Loads
2.4.4 Minimum Loading of Thrust Bearings
2.5 Selection of Lubrication Method
2.5.1 Grease Lubrication
2.5.2 Oil Lubrication
2.6 Selection of Shaft and Housing Fits and Tolerances .
2.7 Selection of Sealing Methods
3 System Design and Implementation 42
3.2.1 Speed 44
3.2.2 Load 44
3.2.3 Reliability 44
3.2.4 Service Life 46
3.2.5 Temperature 46
3.2.6 Dimensions 46
3.2.7 Operating Conditions 46
3.3 Selection of Bearings (SELECTION) 50
3.3.1 Selection of Bearing Types 50
3.3.2 Ranking of Suitable Bearing Types 51
3.3.3 Selection of Optimum Sized Bearings 51
3.4 Installation of Bearings (INSTALLATION) 56
3.4.1 Selection of Sealing method 56
3.4.2 Selection of Lubrication Method 57
3.4.3 Selection of ISO Fits and Tolerances 57
3.5 Update Database (UPDATE) 57
3.6 Printing (PRINT) 59
3.7 Quiting from the System (EXIT) 63
3.8 How to use BEARSEL ? 63
3.9 BEARSEL knowledge base and program files 64
3.10 System Outputs 64
4 Results and Discussions 68
4.1 Example 1 : Bearing selection for a blower 68
4.1.1 Inputs 68
4.1.2 Outputs 69
4.1.3 Discussions 69 4.2 Example 2 : Bearing selection for the traction motor of an elec- tric locomotive 73
4.2.1 Inputs 73 4.2.2 Outputs 74
4.2.3 Discussions 75
4.3 Example 3 : Bearing selection for a ship propeller thrust block . 78
4.3.1 Inputs 78
4.3.2 Outputs 79
4.3.3 Discussions 79
4.4 Example 4 : Bearing selection for a conveyor belt idler 82
4.4.1 Inputs 82
4.4.2 Outputs 83
4.4.3 Discussions 83
4.5 Example 5 : Bearing selection for a crane runwheel 83
4.5.1 Inputs 83
4.5.2 Outputs 87
5 Conclusions and Suggestions for Future Work 91
5.1 conclusions 91
5.2 Scope for future work 91

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