Rulmenti Ecrane Vibrato Are SKF

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Transcript of Rulmenti Ecrane Vibrato Are SKF

2008-03-21 SKF Slide 1 SKF Mining, Mineral Processing & Cement

SKF solutions for vibrating screensSKF 1 Industrial Team 2008

SKF Mining, Mineral Processing and Cement

2008-03-21 SKF Slide 2 SKF Mining, Mineral Processing & Cement

SKF solutions for vibrating screens Bearings Seals Hydraulic assist Hydraulic pumps Alignment tools Lubrication Fault detection Reliability Systems Total Shaft Solutions

2008-03-21 SKF Slide 3 SKF Mining, Mineral Processing & Cement

Typical vibrating screen problemsStart up of a vibrating screenThe clearance fit is reduced Heat from shaft The clearance fit is reduced

Expansion

Expansion

This situation gives axial preloaded bearings2008-03-21 SKF Slide 4 SKF Mining, Mineral Processing & Cement

Expansion

SKF Explorer performance class bearingsOffers longer service life through improved:

Heat treatment Manufacturing Design

2008-03-21 SKF Slide 5 SKF Mining, Mineral Processing & Cement

SKF Explorer bearing for vibrating screens (VA405) SKF Explorer performance class

Three-piece hardened steel cage system guided in outer ring22324 22340 CCJA/W33VA405

C4 internal radial clearance ISO P5 bore ISO P6 outer diameter tolerances Made only in Europe until 2003 - now also SKF Hanover

22308 22314 E/VA405

22315 22322 EJA/VA405

2008-03-21 SKF Slide 6 SKF Mining, Mineral Processing & Cement

SKF Explorer bearing for vibrating screens (VA405)Benefits Longer service life Lower internal friction and operating temperatures Opportunity for down-sizing Reduced maintenance and repair costs Reduced down time

Observations

Interchangeable with 452 bearings

10 C ( 18 F ) cooler operating temperatures Minimum 2 x longer service life Successful downsizes from 233 (453) series

2008-03-21 SKF Slide 7 SKF Mining, Mineral Processing & Cement

Analytical studies in friction2

Slide/roll friction

High slide to roll friction results in higher bearing operating temperatures

SKF Explorer VA405 bearing

0.37

st we lo as tures Fh a SK per tem

0.7

fr

n/ tio ic

st we lo

SKF VA405/VA406 screen bearings operate at lower temperatures than other designs. - 10C (20F)

Results show three piece cage system guided in outer ring has lowest friction2008-03-21 SKF Slide 8 SKF Mining, Mineral Processing & Cement

SKF Explorer with PTFE coated bore (VA406)Features

SKF Explorer performance class bearing Three-piece hardened steel cage system C4 internal radial clearance Higher bearing precision PTFE (Polytetrafluorethylene) coating in boreBenefits

Eliminate fretting corrosion on shaft Eliminate parasitic axial loading of both bearings(locating and non-locating )22322 EJA/VA406 22324 to 22340 CCJA/W33VA406

Longer service life Increased reliability for both bearings

Interchangeable with 452 and VA405 bearings2008-03-21 SKF Slide 9 SKF Mining, Mineral Processing & Cement

SKF Explorer 453 Series CCJA/W33VA405 kitsKits include: (1) SKF Explorer 223 series VA405 or VA406 bearing (1) Inner ring spacer (1) Outer ring spacerOld design New Kits Dimensions d D 110 240

B 80

W 12.1

d2 130

D1 220

453322 CACM2

453322 EJA/VA405 453322 EJA/VA406 453324 CCJA/W33VA405 453324 CCJA/W33VA406 453326 CCJA/W33VA405 453326 CCJA/W33VA406 453328 CCJA/W33VA405 453328 CCJA/W33VA406 453330 CCJA/W33VA405 453330 CCJA/W33VA406 453332 CCJA/W33VA405 453332 CCJA/W33VA406

453324 CACM2

120

260

86

20

145

235

453326 CACM2

130

280

93

19

155

255

B

W

453328 CACM2

140

300

102

16

165

270

D D1 d2 d

453330 CACM2

150

320

108

20

180

290

453332 CACM2

160

340

114

22

190

310

2008-03-21 SKF Slide 10 SKF Mining, Mineral Processing & Cement

SKF CARB in vibrating screensFeatures Free axial internal movement (eliminate axial loading)

Hardened steel cage (VG114) C4 internal radial clearance Increase dimensional precision (reduced tolerances)

Benefits Allows a press fit on shaft to eliminate fretting corrosion

Longer service life Reduced maintenance and repair costs, reduced down time

C 2314 C4/VG114 C 2315 C4/VG114 C 2316 C4/VG114 C 2317 C4/VG114

C 2318 C4/VG114 C 2319 C4/VG114 C 2320 C4/VG114

7 sizes available for vibrating applications (also K bore) CARB operated in screens for years in various locations (Sweden, Australia, Austria)

2008-03-21 SKF Slide 11 SKF Mining, Mineral Processing & Cement

Torodial bearing reduces internal loading

Fr Fa

Fr

Fa = Fr x

Fa = 0

2008-03-21 SKF Slide 12 SKF Mining, Mineral Processing & Cement

Two Solutions for a traditional problemSKF Explorer VA405 roller bearing and CARB bearing

SKF Explorer VA405 and VA406 spherical roller bearings

2008-03-21 SKF Slide 13 SKF Mining, Mineral Processing & Cement

SKF CopperheadSKF Copperhead for mining, mineral processing & cement

2008-03-21 SKF Slide 14 SKF Mining, Mineral Processing & Cement

SKF Copperhead for vibrating screensGear faults Loose components Overloading Loose screen mesh Bearing faults

Bottoming out Lubrication problemsScreen not running / broken belt if connected to PLC

2008-03-21 SKF Slide 15 SKF Mining, Mineral Processing & Cement

Seals for housings, gearboxes & motors

CRW1

CRWA1

V-ring seal

SPEEDI-SLEEVE

Available seals For d < 200 mm (8 inch) WaveSeals CRW1 and and CRWA1 (includes exclusion lip) Material options Temperature limits Nitrile (NBR) -50 C to 100 C (-58 F to 212 F) Duratemp (HNBR) 150 C (300 F) Longlife (VITON) 200 C (392 F) Select seal material option based on operating temperature (seal temp limit > mill temperature ) Seal performance is influenced by the environment, lubrication, shaft and housing condition, and seal type

2008-03-21 SKF Slide 16 SKF Mining, Mineral Processing & Cement

SKF seals for vibrating screens

V-ring type VR2 - Extra wide seating radial shaft type CRW1 - WaveSeals Design recommendations for the labyrinth Customer value Reliable operation Reduced maintenance and repair costs

2008-03-21 SKF Slide 17 SKF Mining, Mineral Processing & Cement

SKF Maintenance ProductsProduct Types Benefits

Hydraulic pumps & injectors Hydraulic nuts Laser Shaft alignment Laser Belt alignment

Reduce maintenance & repair costs Reduce downtime Improve safety

Hydraulic pumps:729124 (for nuts O HMVC 54E) 729124 DA (with digital gauge) TMJL 50 DA (for nuts O HMVC 200E)

Hydraulic nuts:HMVC .. E

TMEB 2 Laser Belt Alignment

TMEA 2 Laser Shaft Alignment

Hydraulic nut rental:ex: HMVE 48E/rental

2008-03-21 SKF Slide 18 SKF Mining, Mineral Processing & Cement

Lubrication of vibrating screens

Oil bath/ oil splash Operating T < 75C => oil ISO VG 150 Operating T > 75C => oil ISO VG 220 EP, rust inhibitor, and anti-foam additives

Grease LGHB2 for higher temperatures LGEP2 for normal conditions

2008-03-21 SKF Slide 19 SKF Mining, Mineral Processing & Cement

SKF resources

www.aptitudexchange.com

SKF Documented Solutions program (DSP)

SKF @ptitude Exchange is SKF's knowledge source for asset maintenance and reliability expertise. White papers, interactive services, tutorials, etc., are now at your fingertips. Register for FREE, and learn about subscription options. DSP is SKFs tool to document the value and Return on Investment (ROI) for its solution.

See www.skf.com for additional solutions

2008-03-21 SKF Slide 20 SKF Mining, Mineral Processing & Cement

SKF solution for vibrating screens SKF Explorer spherical roller bearing CARB toroidal roller bearing SKF bearings for vibrating applications Seals SKF Copperhead fault detection Lubrication Maintenance Products & Services

2008-03-21 SKF Slide 21 SKF Mining, Mineral Processing & Cement

SKF solutions for vibrating screens Improve productivity and profitability Improve

health and safety

Improve the environment

For more information, contact your SKF Authorized Distributor, your SKF Representative, or e-mail us at skfcopperhead@skf.com SKF, CARB, @ptitude, Speedi-Sleeve and SYSTEM 24 are registered trademarks of the SKF Group The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of use of the information contained herein. 2008 SKFGroup Version 1/2/2008

2008-03-21 SKF Slide 22 SKF Mining, Mineral Processing & Cement

2008-03-21 SKF Slide 23 SKF Mining, Mineral Processing & Cement