GCAA MANAGEMENT WORKSHOP INCREASED BEARING PERFORMANCE WITH PROPER SHAFT MOUNT AND SEALS.
-
Upload
kenneth-manning -
Category
Documents
-
view
217 -
download
1
Transcript of GCAA MANAGEMENT WORKSHOP INCREASED BEARING PERFORMANCE WITH PROPER SHAFT MOUNT AND SEALS.
GCAA MANAGEMENT WORKSHOP
INCREASED BEARING PERFORMANCE WITH PROPER
SHAFT MOUNT AND SEALS
Why do bearings fail?
A – LubricationContamination
B - Mounting
C - Miscellaneous
D - True Fatigue
Mounting27%
Misc21%
True Fatigue9%
Lubrication andContamination
43%
What Seals Do...• Keep Contaminants Out
• Keep Lubricant In
Minimize Bearing Failures with the Proper Seal
Good Seals Should
• Operate on hardened and ground surface• Not be forced out during relubrication• Be easily removed without bearing disassembly• Be capable of handling the full misalignment
capability of the bearing
Clearance Seals Z-Seal (Rexnord) H-Seal (Link-Belt)
All metal construction High Speed Excellent Abrasion Resistance High Temperature Full Misalignment Capability Low Drag
Basic Seal Types
Z-SEALZ-SEAL H-SEALH-SEAL
Disadvantages Fine materials and
liquids can pass by seal Heavy vibration can
cause metal parts to wear
Light Contact Lip Seals K-Seal (Rexnord)
High Speed Capable Contact Lip Seal Seals against contaminants Very good in Vibratory applications Full Misalignment Capability
Basic Seal Types
K-SEALK-SEAL
Disadvantages Seal lip pressure causes
higher operating temps Temp limit of 250°
because of Buna-N rubber
Chemicals can affect Buna-N
Heavy Contact Single Lip Seal M-Seal (Rexnord) E-Seal (Link-Belt)
Heavy Contact Seal Seals against fine materials and
liquids Great for vertical shafts Full Misalignment Capability
Basic Seal Types
M-SEALM-SEAL E-SEALE-SEAL
Disadvantages Seal lip pressure results
in higher operating temps
Speed is limited Temp limit 250° because
of Buna-N rubber Chemicals can affect
Buna-N rubber
Multi Lip Heavy Contact Seal E7-Seal (Link-Belt)
Heavy Contact Multi Lip Seal Seals in extremely dirty and wet
environments Metal shield to protect rubber Great for vertical shafts Full Misalignment Capability
Basic Seal Types
E7-SEALE7-SEAL
Disadvantages Heavy Seal lip pressure
results in higher operating temps
Speed is very limited Temp limit 250° because
of Buna-N rubber Chemicals can affect
Buna-N rubber
High Temp Heavy Contact Lip Seal M-Seal Viton (Rexnord)
Heavy Contact Seal Seals against fine materials and
liquids Great for vertical shafts Full Misalignment Capability 400° Temp limit Very resistant to Chemicals
Basic Seal Types
M-SEALM-SEAL
Disadvantages Seal lip pressure results
in higher operating temps
Speed is limited
Ultimate Sealing PackageAuxiliary Cap Seals
Auxiliary Cap Seals
• Seals against liquids and gritty contaminants
• Effective against water washdown, taconite, cement, sand, or caking build up
• Safely encloses rotating components
• Protects primary seal • 5 points of protection
Advantages
Why do bearings fail?
A – LubricationContamination
B - Mounting
C - Miscellaneous
D - True Fatigue
Mounting27%
Misc21%
True Fatigue9%
Lubrication andContamination
43%
Shaft Mounting Systems Comparison
SHAFT ATTACHMENTS
Single Set collarSingle Set collar
Most CommonMost Common
Easy to installEasy to install
Most economicalMost economical
Eccentric LockingEccentric Locking
More Holding PowerMore Holding Power
Accommodates for Accommodates for undersize shaftingundersize shafting
EconomicalEconomical
Double Set collarDouble Set collar
Increased shaft Increased shaft holding powerholding power
Increased StabilityIncreased Stability
Moderate costModerate cost
Tapered Adapter MountTapered Adapter Mount
Full 360Full 360° shaft contact° shaft contact
Concentric MountingConcentric Mounting
Best Running AccuracyBest Running Accuracy
Highest Shaft holding powerHighest Shaft holding power
Accommodates undersize shaftingAccommodates undersize shafting
MOST DIFFICULT TO INSTALLMOST DIFFICULT TO INSTALL
Cost vs Performance Shaft Mount Options
Cost
Per
form
ance
High CostGood
Best
Single Set Collar
Eccentric LockGood
Low Cost
Double Set CollarGood
Tapered Adapter
Installation Time
Inst
all T
ime
Less
More
Single Set CollarGood
Double Set CollarGood
Eccentric Lock
Tapered Adapter
Skill Required For Installation
Ski
ll L
evel
Low
High
Single Set Collar
Eccentric LockGood
Double Set Collar
Tapered Adapter
Load and Speed Performance Shaft Mount Options
Speed
Lo
ad
High
LowGood
HighGood
Single Set CollarGood
Eccentric LockGood
Low
Double Set Collar
Tapered Adapter
What if we could simplify and guarantee that your tapered
adapter installation was good every time?
Installation: ZAF makes it easy!
SAF STYLE SPLIT20 steps
~ 45 minutes
ZAF60007 steps
~ 5 minutes
ZAF is factory lubricated, pre-adjusted and shaft ready
CommonInstallation Errors
1. Set clearance2. Component alignment3. Bolt torque4. Contamination
SHŪRLOK Highlights
Break thru Optical Strain Sensing Technology (OSS) For correct installation every time Proprietary Positive Locking System (PLS) Fast install Easy to remove (Built in Puller) Fits entire Rexnord Housing line including the ZAF (SAF style interchange Takes the mystery out of mounting
Break Thru: SpyglassTM OSS Technology
Benefits • Indicates when the mount has been properly tightened
• Signals too loose & too tight
• Two indicators on lock nut to ensure a proper reading
Proprietary: Positive Locking System
AlignmentGroove
Tapered Sleeve
Benefits
• Prevents inner ring fracture in high load & vibratory environments
• Enables industry leading grip on shaft (13,500 lbs on 2 7/16”)
• Mounting is no longer limitation of capacity,
• Enables ease of removal
3 Field interchangeable seal options suits many diverse applications
Spyglass™ Optical Strain Sensing Technology provides error free installation
Rugged one-piece housing decreases installation/removal time by 80% versus SAF models
Roller elements machined to best-in-class tolerance provides longer bearing life
Self aligning spherical roller bearing provides 3 degrees of static and dynamic misalignment
Positive Locking system provides easy installation and removal, even for undersized shafts.
Factory pre-lubricated elements require 80% less lubrication than SAF models - ISO 14000 Friendly!
Factory pre-set clearances reduces installation time by 80%!
Super-finished raceways provide a cool running, quiet, high speed and high load capacity bearing
Hardened Adapter Inner Ring resists fracture under shock and heavy loads
Easy installation: Simply tighten collar until the Spyglass shows this color pattern
Rexnord SHŪRLOK F& B
CHOOSE THE BEST SEAL AND THE BEST SHAFT
MOUNT AND YOU WILL GET LONGER BEARING