Page 275 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer
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Gear and Coupling Best Practices  Be st Practice 4.6































              Fig 4.6.7   Rotor/case thermal movement e steam turbine
















                                                                   Fig 4.6.10   Jaw and spider coupling





              Fig 4.6.8   Multiple, convoluted diaphragm-spacer coupling (Courtesy
              of Zurn Industries)

















                                                                   Fig 4.6.11   Transient torsional excitation e Frequency vs. motor speed
                                                                   or elastomeric coupling shown in Figure 4.6.12 significantly re-
                                                                   duces the torque amplification, by dampening out the response in
                                                                   the elastomeric elements. The hardness of these elements is
              Fig 4.6.9   Reduced moment convoluted (wavy) diaphragm spacer  controlled to limit the maximum amplification factor to an ac-
              coupling (Courtesy of Lucas Aerospace)               ceptable value (usually 2-3  rated torque).

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