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BS ISO 14839-4:2012

BS ISO 14839-4:2012

$198.66

Mechanical vibration. Vibration of rotating machinery equipped with active magnetic bearings – Technical guidelines

Published By Publication Date Number of Pages
BSI 2012 52
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This part of ISO 14839:

  1. indicates a typical architecture of an active magnetic bearing (AMB) system so that users can understand which components are likely to comprise such systems and which functions these components provide;

  2. identifies the primary similarities and differences between AMB systems and conventional mechanical bearings;

NOTE This information helps AMB system users better to understand the selection process and implications of transition to AMB technology.

  1. identifies the environmental factors that have significant impact on AMB system performance;

  2. identifies the operating limitations that are unique to AMB systems and defines standardized methods of assessing these limitations;

  3. identifies typical mechanisms for managing these limitations, especially rotor unbalance;

  4. provides considerations for the design and performance of touchdown bearing systems;

  5. defines a typical signal set for provision in an AMB system for proper system/process interface as well as condition and diagnostic monitoring;

  6. details current best practices for monitoring, operation and maintenance to achieve highest operational system reliability;

  7. identifies typical fault-handling practices;

  8. recommends inspection and preventive maintenance processes for AMB systems.

PDF Catalog

PDF Pages PDF Title
7 Foreword
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Active magnetic bearing system architecture
11 5 Important differences between magnetic bearings and conventional bearings
5.1 Some advantages of active magnetic bearings
13 5.2 Some disadvantages of active magnetic bearings
14 5.3 Comparison among rolling, fluid film and magnetic bearings
6 System condition monitoring
6.1 General
6.2 Excess rotor shaft displacement (radial x, y, and axial z)
16 6.3 Excess of rotor expansion
6.4 Overload of bearing (over current of bearing coil)
6.5 Bearing temperature high
6.6 Overspeed of rotor
6.7 Power supply defect
6.8 Battery power defect
6.9 Controller temperature high
17 6.10 Cooling
7 Environmental factors
7.1 Introduction
18 7.2 Environmental category tables
21 7.3 Explosive atmosphere types
8 System requirements
8.1 Estimation of bearing load
22 8.2 Limitation of dI/dt for laminated bearings
24 8.3 Balancing
25 8.4 Location of bearings and transducers
8.5 Fault recovery and fault handling
8.6 Signal processing
8.7 Monitoring system
26 9 Touchdown bearings
9.1 Touchdown bearing requirements
9.2 Design of touchdown bearings
28 9.3 Touchdown bearing monitoring
9.4 Touchdown test methods
30 10 Preventive inspection
10.1 Introduction
10.2 Regular inspection and maintenance
10.3 Condition monitoring (recommendation)
31 10.4 Inspection checklist
32 Annex A
(informative)

Sizing of magnetic bearings

35 Annex B
(informative)

Example of a design specification check list

37 Annex C
(informative)

Example conditions for acceptance tests

38 Annex D
(informative)

Touchdown test method example

40 Annex E
(informative)

Example of system limitations (current/voltage saturation)

43 Annex F
(informative)

Unbalance control

48 Bibliography
BS ISO 14839-4:2012
$198.66