BOLTED JOINT ASSEMBLY COMMON WIND TURBINE BOLTING APPLICATIONS

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BOLTED JOINT ASSEMBLYCOMMON WIND TURBINE
BOLTING APPLICATIONS
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• The following material is intended to make you
  aware of the commonly accepted and recognized
  principles and methods used in assembling bolted
  joints. However, every possible application of
  these methods cannot be foreseen and these
  general guidelines do not supersede any other
  applicable rules or regulations.
• ALWAYS FOLLOW CURRENT COMPANY AND LOCAL SAFETY
  RULES AND PROCEDURES WHEN PERFORMING ANY OF THE
  WORK DESCRIBED IN THIS PRESENTATION.
• Hytorc has no control over, and assumes no
  responsibility for any damage, injury or work
  interruptions due to any persons use of, or
  reliance upon these generally accepted methods
  and principles.

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PRODUCTION APPLICATIONS
GEARBOX BEARINGS
GENERATOR COUPLING
MAIN BEARINGS
BLADE BEARINGS
BEDPLATE BOLTS
YAW BEARING
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INSTALLATION APPLICATIONS
ROTOR TO MAIN SHAFT
BLADES TO HUB
TOWER TO NACELLLE
TOWER BOLTS
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MAINTENANCE APPLICATIONS
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BRAKE CALIPER BOLTS
36MM BOLT HEADS
STEALTH-2
MAKE UP TORQUE 530 FT.LBS.
GE-WIND PRODUCTION TEHACHAPI, CALIFORNIA
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YAW MOTOR ASSEMBLY
17MM ALLEN BOLTS
HY-.7MXT
17MM DIRECT HEX DRIVE
MAKE UP TORQUE 510 FT. LBS.
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HUB BOLTS
HY-3SA 50MM NUTS
MAKE UP TORQUE 1400 FT. LBS.
PUCK COVERS
60MM BOLT HEADS
MAKE UP TORQUE 1550 FT. LBS.
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BED PLATE BOLTS
60MM NUTS
LOW CLEAR. 60MM LINK
MAKE UP SPEC. 270 DEGREE NUT TURN
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PEDESTAL BLOCK BOLTS
60MM BOLT HEADS
MODEL 5
MAKE UP TORQUE 2080 FT. LBS.
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Lets Try A Few Questions To Ensure We Understand
About Wind Applications And Loosening
(Quiz 2)
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• QUIZ
• 1. Proper bolting techniques are important during
  which phases of wind turbine work? A.
  Production B. Installation C. Maintenance D.
  All of these
• 2. Elastic interaction refers to the loosening of
  one bolt when others around it are tightened.
  How should this problem be addressed?
  ________________________________________
• 3. T / F There is no need to worry about
  tightening bolts in gradually increasing steps in
  wind turbines because what I do to one bolt has
  very little effect on the others?

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• QUIZ
• 4. T / F Shear loads try to move the two sides
  of a joint past one another, while axial loads
  try to separate or compress the joint?
• 5. It is rapidly vibrating shear loads that are
  most responsible for bolts coming loose. Wind
  turbines have many joints that are susceptible to
  this kind of vibration. The best thing I can do
  to avoid bolts coming loose is A. Use
  loc-tite B. Tighten properly in the first
  place C. Use lock washers D. Avoid
  lubrication
• 6. T / F Each manufacturer has a specification
  document that tells me the appropriate torque
  values and bolting procedures for each critical
  joint in the tower and turbine?

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• Quiz answers
• D. All of these
• Gradual incremental tightening and a check pass
  on all bolts
• False. Most of the bolts are close enough to one
  another to have great effect on each other.
• True
• B. Tighten the bolts properly in the first place
• True. Each manufacturer will have specific Bolt
  Torque Specifications and Work Instructions
  which must be followed)