John-crane-metastream-introduction-coupling.pdf

introduction-coupling

1. © John Crane
(2012)
Introduction to Couplings
The Basics.

2. © John Crane
(2012)
▪Connect two machine shafts
▪Transmit torque
Basic Function Of A Coupling?
A couplingis a device used to
connect two shafts together at
their ends for the purpose of
transmitting power

3. © John Crane
(2012)
Why Flexible Couplings?
Misalignment & Vibratory loads exist
So our Coupling needs too:
▪Connect two machine shafts
▪Transmit torque
▪Accommodate misalignment
▪Absorb shock loads

4. © John Crane
(2012)
Axial Misalignment.
Driver Driven
Axial Misalignment

5. © John Crane
(2012)
Angular Misalignment.
Driver
Driven
Angular Misalignment

6. © John Crane
(2012)
Lateral Misalignment.
Driver
Driven
Lateral Offset Misalignment

7. © John Crane
(2012)
Lateral
Axial
End float
Can occur Individually or as a combination
Misalignment.
Angular

8. © John Crane
(2012)
▪Initial residual alignment
▪Thermal expansions
•Axial
•Vertical
•Horizontal
▪Pipe strain
▪Clearance or float in bearings
•Axial end float
•radial
▪Foundation movements
•Earthquakes
Misalignment Is Always There !

9. © John Crane
(2012)
Driven Coupling Driver
Flexible Coupling
That’s Why We Need A Flexible Coupling.

10. © John Crane
(2012)
John Crane Portfolio

11. © John Crane
(2012)
= Safety & Reliability
▪Fit and Forget
▪Overload Protection
▪Anti-Fly Retention
▪Low Imposed Loads
▪Zero Maintenance
▪Standards Features
▪No Backlash
▪Spark resistant
▪Shrouded Design
▪Electrical Insulation

12. © John Crane
(2012)
Applications Overview
Coupling Market
Turbo MachineryAPI PumpsCritical IndustrialGeneral Industrial
Compressors
Industrial Gas
Turbines
High speed
steam turbines
Process Pumps
Low speed
compressors
Boiler feed pumps
Large offsite pumps
Industrial Compressors
▪Screw/ Lobe
▪Vacuum
Any mechanical drive
Small offsite pumps
Chemical pumps
Low duty mechanical
drives
H SeriesT & M SeriesL & T SeriesA C & L Series

13. © John Crane
(2012)
General Industrial applications.

14. © John Crane
(2012)
Industrial Applications -Vertical
Specification.Metric Imperial
12 sizes from: 1125 to 10500
Torques to: 12.7 KN-m113 lbf-in x 10³
Speeds to: 3,600 rpm
Shaft Ø to: 265 mm 10.5 in
Standards: John Crane Std
API 610
C Series

15. © John Crane
(2012)
L Series
[disc]
Membrane Shapes
Insert & Membrane
A Series
[Inserts]

16. © John Crane
(2012)
A Series
General Industrial Applications
Specification.Metric Imperial
9 sizes from: 00 to 08
Torques to: 17.2 KN-m152 lbf-in x 10³
Speeds to: 16,000 rpm
Shaft Ø to: 155 mm
Standards: John Crane Std
L Series
Specification.Metric Imperial
19 sizes from: 0007 to 9025
Torques to: 238 KN-m2106 lbf-in x 10³
Speeds to: 7,000 rpm
Shaft Ø to: 350 mm 13.62 in
Standards: DIN /ISO ATEX 95

17. © John Crane
(2012)
A Series Close Coupled
Close
Coupled
Hub
Close
Coupled
Hub
Insert Retaining Ring

18. © John Crane
(2012)
Hub

19. © John Crane
(2012)
Retaining RingCentrifugal
Force
Axial Forces
Heat = Energy
Alignment
Slots
Retaining Ring
Retaining Ring
Screws

20. © John Crane
(2012)
Critical Industrial Applications

21. © John Crane
(2012)
L Series
[disc]
Membrane Shapes
T Series
[disc]
M Series
[diaphragm style]
Membrane Shapes

22. © John Crane
(2012)
L Series
Critical Industrial Applications
Specification.Metric Imperial
19 sizes from: 0007 to 9025
Torques to: 238 KN-m 2106 lbf-in x 10³
Speeds to: 7,000 rpm
Shaft Ø to: 350 mm 13.62 in
Standards: DIN /ISO ATEX 95
TSR/ TLR Series
Specification.Metric Imperial
25 sizes from: 0033 to 9033
Torques to: 315 KN-m 2787 lbf-in x 10³
Speeds to: 6,400 rpm
Shaft Ø to: 340 mm 13.38 in
Standards: John Crane Std

23. © John Crane
(2012)
Standard
Hub
Drive
Bolts
Membrane Packs
Spacer
L Series CouplingRef Feature Benefit SafetyReliability
1 2 membrane banks Lateral, angular & axial misalignment P
2 Alternating fastening at each end Drive through membranes for flexibility P
3 Black Finish ! Corrosion protection P

24. © John Crane
(2012)
L Series Anti Fly
▪Fitted to all Metastream couplings, which provides the first level protection
against torque overload, and in the unlikely event of membrane failure, due to
higher than recommended misalignments, will ensure the spacer is centered on
it's rotational centre.
Overload
CollarRef Feature Benefit SafetyReliability
6 Overload collar Anti fly Safety & overload protection P
15 Silver looking overload collars Monel material for spark resistance P

25. © John Crane
(2012)
L Series Membrane Unit Construction
Membranes
Sleeve
Spacer
WasherRef Feature Benefit SafetyReliability
5 Membrane pack Simpler assembly & better reliability P

26. © John Crane
(2012)
Membranes
Sleeve
Spacer
Washer
L Series Profiled Washer
ProfiledRef Feature Benefit SafetyReliability
7 Profiled washers Low stress and longer life P

27. © John Crane
(2012)
L Series Inherent Balance
▪All parts are fully machined to high tolerances to
ensure the coupling has a high level of integral
balance.
▪The coupling meets AGMA 9000 class 8 Ref Feature Benefit SafetyReliability
13 Symmetrical construction Balance integrity to meet AGMA class 8 P

28. © John Crane
(2012)
TSR Coupling Construction Ref Feature Benefit SafetyReliability
16 Reverse hubs Short DBSE, with options on hub fitting configurations
17 Split spacer Assembly, fitting and insitu replacement of membranes Standard
Standard
Stripper
Bolts
Standard
Hub
Split
Spacer

29. © John Crane
(2012)
TSRC
TSRH
TSRS
Options –To accommodate DBSE Variation

30. © John Crane
(2012)
API Applications

31. © John Crane
(2012)
API Applications
Specification. Metric Imperial
20 sizes from: 0013 to 9049
Torques to: 470 KN-m 4142 lbf-in x 10³
Speeds to: 25,000 rpm
Shaft Ø to: 580 mm 22.83 in
Standards: ISO 13709 (API610)
ISO 10441 (API 671)
Specification.Metric Imperial
17 sizes from: 0003 to 9010
Torques to: 96 KN-m 849 lbf-in x 10³
Speeds to: 24,000 rpm
Shaft Ø to: 300 mm 11.81 in
Standards: ISO 13709 (API 610)
TSK Series TLK Series M Series

32. © John Crane
(2012)
API Applications –Imperial
Specification.Metric Imperial
26 sizes from: 0013 to 9049
Torques to: 470 KN-m 4141 lbf-in x 10³
Speeds to: 25,500 rpm
Shaft Ø to: 580 mm 22.83 in
Standards: ISO 13709 (API610)
ISO 10441 (API 671)
TSC Series TLC Series

33. © John Crane
(2012)
T Series Coupling
Large
Hub
Standard
Hub
Stripper
Bolts
Transmission UnitRef Feature Benefit SafetyReliability
1 2 membrane banks Lateral, angular & axial misalignment P
2 Alternating fastening at each end Drive through membranes for flexibility P
3 Black Finish ! Corrosion protection P
14 Large & standard hub Maximise hub boss diameter to max bore
18 Screw driver slots Release the spigot fit, and aid assembly
Standard
Standard

34. © John Crane
(2012)
T Series Membrane Material
▪John Crane use a special grade of AISI 301 half hard, which has been tested
thoroughly and proved to be the best material to resist fatigue and fretting, which
ultimately gives the long life.
▪Other manufacturers use alternative lower cost stainless steels, which is not as
good at resisting fatigue.Ref Feature Benefit SafetyReliability
9 Silver looking membranes Stainless steel for corrosion resistance P

35. © John Crane
(2012)
T Series Membrane
▪Invented by Metastream in the 1970s, to give the optimum shape, for low stress, and
minimum reaction forces due to misalignment.
▪This ensures the bearings are no overloaded and vibrations are kept to a minimum:
▪Life of the coupling enhanced
▪Life of the bearings
▪Reliable rotating assembly.Ref Feature Benefit SafetyReliability
7 Scolloped membranes Low stiffness and optimised stresses P

36. © John Crane
(2012)
T Series Pre-stretch
▪A very important feature to improve life.
▪This ensures the leading links do not bow when subjected to torque:
▪Preventing high bending loads around the edge of the washers
▪Critical to ensuring minimum stress at this point.
TensionTension²

37. © John Crane
(2012)
T Series Pre-stretchRef Feature Benefit SafetyReliability
17 Prestretch Reliability and bow free compression link P

38. © John Crane
(2012)
Membrane Fatigue Failure Mode
Failure Occurs
at Edge of
Washer

39. © John Crane
(2012)
T Series Profiled Washer
▪A critical area of the design, where we have optimized the profile to give minimum
stress.
Washer RadiusRef Feature Benefit SafetyReliability
6 Profiled washers Low stress and longer life P
Washer Radius
Life
Optimum Radius
Maximum Life

40. © John Crane
(2012)
T Series Anti-Fly
▪Fitted to all Metastream couplings, which provides the first level protection
against torque overload, and in the unlikely event of membrane failure, due to
higher than recommended misalignments, will ensure the spacer is centered on
it's rotational centre.
▪This is backed up by an anti-fly spigot on the guard ring of course, as specified by
API 610, and ISO 13709.
Anti fly
Spigot
Overload
CollarRef Feature Benefit SafetyReliability
5 Overload collar Anti fly Safety & overload protection P
11 Anti fly spigot Safety to meet API 610 P
19 Silver looking overload collars Monel material for spark resistance P P

41. © John Crane
(2012)
T Series Inherent Balance
▪All parts are fully machined to high tolerances to
ensure the coupling has a high level of integral
balance.
▪The coupling meets AGMA 9000 class 9, which is
a prerequisite of API 610Ref Feature Benefit SafetyReliability
10 Symmetrical construction Balance integrity to meet AGMA class 8 P
20 Spigot and recess fit Balance integrity to meet AGMA class 9 P

42. © John Crane
(2012)
Large
Hub
Stripper
Bolts
Transmission Unit
M Series Coupling ConstructionRef Feature Benefit SafetyReliability
1 2 membrane banks Lateral, angular & axial misalignment P
2 Black Finish ! Corrosion protection P
11 Large & standard hub Maximise hub boss diameter to max bore
12 Lock washers Prevents Vibration loosening P P
13 Screw driver slots Release the spigot fit, and aid assembly Standard
Standard

43. © John Crane
(2012)
M Series Membrane Material
▪John Crane use a special grade of AISI 301 half hard, which has been tested
thoroughly and proved to be the best material to resist fatigue and fretting, which
ultimately gives the long life.
▪The couplings have proven MTBF in excess of 50 years.
▪Other manufacturers use alternative lower cost stainless steels, which is not as
good at resisting fatigue.Ref Feature Benefit SafetyReliability
4 Silver looking membranes Stainless steel for corrosion resistance P

44. © John Crane
(2012)
M Series Membrane Unit
BearingRef Feature Benefit SafetyReliability
3 Membrane Units Simpler assembly & better reliability P
6 Anti fly bearing Safety and spin free operation P
10 Anti fly spigot Safety to meet API 610 P

45. © John Crane
(2012)
Torque applied
M Series Membrane
▪Diaphragm style unique to John Crane
▪Torque transmitted in shear across each spoke
▪Disconnects driveRef Feature Benefit SafetyReliability
9 Spoke form membrane Drive through membranes for flexibility P P

46. © John Crane
(2012)
Driven Shaft Drive Shaft
Disconnects drive
Safety Bush
Retains Spacer.
Membrane Failure
M Series Disconnect

47. © John Crane
(2012)
▪As the M Series Coupling disconnects the drive, there is:
•No risk on the coupling trying to continue the torque transmission after
membrane failure.
•Protection of the associated machines preventing shaft failure.
•Protection of the bearings.
•Easy method of detecting a problem. -no drive no flow.
•Low risk of a coupling flying out -Bearing built in.
M Series Anti-Fly

48. © John Crane
(2012)
Inherent Balance -Reliability
▪All parts are fully machined to high tolerances to
ensure the coupling has a high level of integral
balance.
▪The coupling meets AGMA 9000 class 9, which is
a prerequisite of API 610Ref Feature Benefit SafetyReliability
5 Symmetrical construction Balance integrity to meet AGMA class 8 P P
14 Spigot and recess fit Balance integrity to meet AGMA class 9 P

49. © John Crane
(2012)
Turbo Machinery

50. © John Crane
(2012)
Turbo Machinery
Specification. Metric Imperial
102 sizes from: 0074 to 0485
Torques to: 579 KN-m 4639 lbf-in x 10³
Speeds to: 39,000 rpm
Shaft Ø to: 430 mm 17.92 in
Standards: ISO 10441 (API 671)
H*FE Series H*CE SeriesH*RE Series

51. © John Crane
(2012)
Turbo Machinery
Specification.Metric Imperial
20 sizes from: 0240 to 9017
Torques to: 216 KN-m1911 lbf-in x 10³
Speeds to: 39,000 rpm
Shaft Ø to: 205 mm 8.00 in
Standards: ISO 10441 (API 671)
Specification.Metric Imperial
41 sizes from: 0074 to 0485
Torques to: 579 KN-m4639 lbf-in x 10³
Speeds to: 28,300 rpm
Shaft Ø to: 430 mm 17.92 in
Standards: ISO 10441 (API 671)
H*FE Series
H*CE Series
H*RE Series
Specification.Metric Imperial
41 sizes from: 0074 to 0485
Torques to: 579 KN-m4639 lbf-in x 10³
Speeds to: 37,700 rpm
Shaft Ø to: 430 mm 17.92 in
Standards: ISO 10441 (API 671)

52. © John Crane
(2012)
H Series -overview
▪Extensive High Performance Coupling experience
•Over 30,000 HP operating couplings
▪Fully complies to ISO10441 / API 671 for critical coupling applications.
▪Standard axial shim design
▪Standard spark resistant design -future
▪The standard materials of construction make it suitable to operate down to -55º C
▪Options for large shafts, spark resistant, torque limiting, electrical insulation, torque
or alignment monitoring, very high torques, axial limitation.

53. © John Crane
(2012)
Typical Applications
31 MW at 3600 rpm
42 MW at 1500 rpm
36 MW at 1500 rpm
8.3 MW at 750 rpm
5 MW at 10500 rpm