comp-ds driveshaft - SPX Cooling Technologies
Contents
1. Torque Values Fastener Inch Pounds Foot Pounds Newton Meters Setscrew 16 240 20 27 Cap Screw 16 360 30 40 Cap Screw 6 12 600 50 68 Note maintenance General Inspection of the complete driveshaft should be made every six months Marley Comp DS driveshafts do not require lubrication If the tube and flange assembly is replaced the driveshaft must be rebalanced It may be performed on the tower by an experienced service contractor or returned to an authorized manufacturing facility Hardware Look for corrosion loose cap screws and set screws Also check driveshaft alignment If as installed alignment has changed motor and Geareducer support hardware should be checked for looseness If necessary realign to within tolerance Composite The tube and flange assembly should be inspected for excessive fiber bloom and cracks The flexible element assembly should be inspected for cracks or excessive crazing in the urethane as well as any exposed areas of the carbon fiber reinforcement Replacing Flexible Elements It is recommended to replace the flexible elements at least every five years on a preventative maintenance schedule To do this 1 Loosen the set screws 2 Remove the tube and flange assembly 3 Remove the coupling assemblies 4 Secure the hub in a vice or something similar and remove the eight hub cap screws Additionally it is recommended to chase the eight 3 8 16 tapped holes with a t2. closertogether or farther apart after the driveshaft set screws are tightened Angular Alignment Use a firm and secure means of attaching a dial indicator base to the hub and align the indicator point to contact the center of a flexible element cap screw head connection point between flex element and flange If using a Marley Driveshaft Alignment Indicator Kit fasten the base of the kit into the tapped hole located 90 from the keyway with the supplied thumbscrew refer to Fig 8 Rotate the driveshaft by hand to ensure the dial indicator remains in contact with the cap screw and that its travel doesn t bottom out DIAL INDICATOR CHAIN WRAP MOUNT Figure 8 Marley Driveshaft Alignment Indicator Alternative Alignment Method Typical Chain Wrap Mount Note Table 2 alignment Check alignment at each end of the driveshaft by rotating the shaft through 360 noting the total change in the dial indicator reading The total indicator reading should not exceed 0 012 0 3 mm Total indicator reading is the absolute value sum e g 5 and 7 mils readout through one revolution equals 12 mils TIR Final Ensure all fasteners are tight see Table 2 before placing aligned driveshaft into service Set Screws Cap Screws Geareducer Jacking Bolts on Rear Feet drill holes and use dowel pins if necessary Geareducer and Motor Support Bolts All Comp DS Series
3. flange Ensure the cap screw head is towards the outside of the driveshaft assembly i e hub side of driveshaft as shown in Figure 6 Install the four washers and lock nuts and progressively tighten to the value specified in Table 2 Do not lubricate these fasteners th 8 Repeat steps 6 and 7 for motor end coupling assembly It may be necessary to adjust the method of support initiated in Step 6 Do NOT allow the entire weight of the driveshaft to be cantilever supported by either coupling at anytime Flexible element damage may result and the warranty will be voided If installing motor end flexible element hardware is challenging large scale misalignment may exist Symptoms of this scenario may consist of some or none of the flex element cap screws easily sliding through the adjacent flange fastener holes If this situation exists the motor and Geareducer positioning should be adjusted as necessary installation 9 Inspect engagement on both hubs see Table 1 and ensure that engage ment is within tolerance It may be necessary to adjust the position of the entire driveshaft assembly Furthermore it may be required to slightly modify the location of the motor to affect the distance between shaft ends Hub Engagement Series Inches Millimeters Comp 4 22 Ve 4 63 5 3 6 Table 1 Comp 6 2 Ve Va 73 0 3 6 END OF MOTOR ENGAGEMENT END OF HUB OR GEAREDUCER h TU
4. BE AND FLANGE FLEX ELEMENT ASSEMBLY Figure 7 10 With set screws backed out rotate the driveshaft by hand a couple of rotations 11 Tighten all set screws Proceed with alignment procedure alignment General Marley Comp DS driveshafts are designed to accommodate a certain amount of misalignment They must be installed within axial and angular tolerance to ensure long life and retain the warranty These two forms of alignment are independent of one another and correcting one may interfere with the other Alignment must be checked at each coupling Move motor and or Geareducer vertically by shimming or horizontally by shifting or twisting on support Eliminate any large scale misalignment before proceeding Then check for axial alignment to ensure the driveshaft overall length OAL isn t adversely affected by the hub and or equipment placement Soft Foot The motor and Geareducer must seat firm and flat against their respective supports during all alignment inspection s If equipment location is adjusted the support feet must be secured before rechecking alignment Axial Alignment Special care must be given to the axial hub positioning If the OAL is effec tively too long or short it will reduce the flexible element service life The best method for avoiding this is to always ensure the set screw torque is relieved when adjusting the motor or Geareducer In other words never move the Geareducer or motor axially
5. SIP gt lt WHERE IDEAS MEET INDUSTRY comp ds driveshaft INSTALLATION OPERATION MAINTENANCE 20331596 rev A ISSUED 06 2014 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT gt Marley Note parts list 1 22B Figure 1 1 0 Complete Driveshaft a 1 Tube and Flange Assembly 2 Coupling Assembly 2 required per driveshaft complete with hub flexible element cap screws washers lock nuts and set screws 21 Hub Assembly A Hub B Cap Screws 8 required per hub C Set Screws 2 required per hub _ 22 Flexible Element Assembly A Flexible Element B Cap Screws 4 required per flexible element C Lock Nuts 4 required per flexible element D Washers 4 required per flexible element Earlier generations of this driveshaft did not include bonded bushings Most parts are still interchangeable If a tube and flange assembly without bushings is replaced with a newer version items 1 22B will also require replacement When ordering parts always provide the cooling tower serial number and when possible the driveshaft serial number from a decal located on the composite tube A Warning safety and handling Safety Warning Because of the potential for property damage and or danger to person s it is critical to follow the proper selection installation and operating procedures Exposed rotating devices are potentially dangerous a
6. ap to clean out the residual thread locker prior to installing new flex element and fasteners 5 Remove and replace the flexible element Be sure to align a flex element tab ear to the hub keyway see Figures 1 and 2 6 Re install the cap screws using the supplied thread locker and torque to the specified value See Table 2 7 Refer to the Installation section within this manual to reinstall and align driveshaft assembly WHERE IDEAS MEET INDUSTRY SPX COOLING TECHNOLOGIES INC 7401 W 129 ST OVERLAND PARK KANSAS 66213 USA P 913 664 7400 F 913 664 7439 spxcooling spx com spxcooling com In the interest of technological progress all products are subject to design and or material change without notice ISSUED 06 2014 Z0331596 rev A M2010 1378B COPYRIGHT 2014 SPX Corporation comp ds driveshaft USER MANUAL
7. ded in the replacement Kit 2 Remove any burrs or scratches from the motor or Geareducer shafts and coat both shafts with an anti seize compound 3 Insert both keys into their corresponding keyways Ensure they are fully seated Note Note Figure 3 Figure 4 installation Some driveshafts utilizing large bore hubs may come supplied with a rectangular key If applicable the supplied key must be used 4 Start the driveshaft installation by sliding the couplings hubs with attached flexible element onto their respective shafts Slide them onto the shaft ends with approximately one inch of shaft protrusion through the flexible element opening as shown in the Figure 3 There are some large motor shafts that will not clear the motor end flexible element aperture If this is the case slide that end on as far as possible and add another inch of protrusion to the Geareducer end input shaft exposure 1 2 1 2 oo re Doo 5 Lift the tube and flange assembly into place as shown in Figure 4 and support approximately level Ensure flanges are oriented near the correct hubs refer to match marks a Pi gt Figure 5 Figure 6 A Caution Note installation 6 Adjust the hub engagement on the Geareducer input shaft so that the hub hangs off of the shaft approximately and align match mark to adjacent flange match mark hep 7 Insert the four cap screws through the Geareducer end coupling assem bly and
8. nd can cause injury or death They must be guarded in compliance with OSHA ANSI and all other local standards for the specific application All personnel must follow applicable work safety standards such as Lockout Tagout procedures while working in or around power transmission devices Handling Considerations 1 Marley Comp DS driveshafts are designed and manufactured to be very durable and provide years of service if handled properly 2 Minor aesthetic imperfections such as surface abrasions scuffs or small bumps may be present from manufacturing or handling and will not affect performance Heavy concentrated impacts may cause gouges penetration or soft spots in the composite components If any damage is observed the driveshaft should not be placed into service Only SPX engineering person nel are authorized to approve any issues exceeding the above description of minor aesthetic imperfections 3 The entire driveshaft should be inspected periodically or after a strenuous event such as excessive torque or misalignment particularly the flexible element Refer to the maintenance section for further information 4 Unless replacing the flexible element for maintenance purposes never re move the cap screws that connect the flexible element to its adjacent hub Factory thread locker will be compromised and the warranty will be voided A Warning Figure 2 A Caution installation General Marley Comp DS driveshafts consi
9. st of a tube and flange assembly with a motor and a Geareducer coupling Comp DS driveshafts are dynamically balanced at the factory as a complete assembly Flanges and hubs are match marked and balanced Do not change position or relation of match marked components during installation If the tube and flange assembly is replaced the driveshaft must be rebalanced It may be performed on the tower by an expe rienced service contractor or returned to an authorized manufacturing facility All fasteners that connect to the flexible element must NOT be over tightened If over tightened they will become loose over time and serious property damage and or injury to person s may result Refer to Table 2 for torque values Installation Before installing the driveshaft be sure the motor and Geareducer are on level bases and their shafts are in reasonable alignment Note match mark numbers on the driveshaft flanges and hubs then remove the coupling assemblies from either end by removing only the flexible element fasteners 1 22B 1 22C and 1 22D Le The hub assembly cap screws 8 per hub that connect the flexible element to the hub are factory assembled with thread lock com pound They should NOT be loosened or removed when installing the driveshaft These hub fasteners are to be removed only when replacing the flexible element for maintenance purposes and must be reinstalled with OEM supplied thread lock compound that is inclu
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