Dresser Roots DVJ WHISPAIR, Installation Operation & Maintenance

Page 1: ...dents to persons working on or near the equipment during both installation and operation SEE SAFETY PRECAUTIONS o Install all equipment correctly Foundation design must be adequate and piping carefully done Use recommended accessories for operating protection o Make sure both driving and driven equipment is correctly lubricated before start up See LUBRICATION o Read starting checkpoints under OPER...

Page 2: ...DVJ jet air flow diagram above figures to Pocket A The atmospheric air flowing to the closed pockets is at a much lower temperature than the discharge air returned to the pockets in RAS WHISPAIR design The cooling effect allows blower operation at higher vacuum levels without exceeding the blower s maximum temperature rise For closed loop DVJ applications as shown in Fig 4 a portion of discharge g...

Page 3: ...specific approval from the nearest Sales Office Normally when a blower is operated at the design condition stamped on its nameplate the specified limits apply VACUUM With the discharge going to atmospheric pressure the inlet suction or vacuum in inches of mercury kPa must not be greater than the values listed for the specific frame size The pressure rise in pounds per square inch kPa between blowe...

Page 4: ...ull on the bolts during lift should be nearly vertical Since a considerable cable angle will usually be unavoidable place a stiff spreader between the eyebolts to take the side strain and adjust cable lengths so that the unit is approximately level during the lift A harness featuring four lifting hooks is required to lift base mounted units After inserting the hooks in the lifting lugs block the c...

Page 5: ... in place Any block distortions during curing then will have little or no affect on equipment and alignment To simplify machine leveling and provide good grouting bond the top of the foundation should be struck off as level as possible but left with a rough surface Spring type vibration isolating mounting are not recommended for use directly between the operating equipment and the foundation Where...

Page 6: ...allel to the blower shaft and level To position the driver properly both sheaves need to be mounted on their shafts and the shaft center distance must be known The blower sheave usually the larger one in diameter must be of the narrow hub type Install it so that its inner hub face is not more than 1 4 6 mm away from the bearing housing end cover The driver sheave should also be mounted as close to...

Page 7: ...se as specified by its manufacturer and assemble A belt driven installation should require no realignment if all items were correctly positioned and leveled before grouting Belts may be installed now by adjusting driver position toward the blower sufficiently to permit belts to be laid in their sheave grooves easily Do not pry or roll them into place Before doing this inspect all grooves for burrs...

Page 8: ...DVJ WHISPAIR Dry Exhauster 9 Figure 3 Installation with Suggested Locations for Available Accessories DVJ Figure 4 Installation with Suggested Locations for Available Accessories RGS DVJ ...

Page 9: ...s at the drive end In a horizontal style blower the gear end lubrication arrangement is identical except that a secondary sump is formed around each gear and the total oil capacity is more than doubled Note A good grade of industrial type non detergent anti foaming oil should be used when the average of blower inlet and discharge temperature is 125 F 52 C or lower Oil should be changed after the f...

Page 10: ...B with lock C and drop assembly back into lower reservoir and replace bottle Note Raising B raises oil level and lowering B lowers oil level During operation the sump levels can be expected to fluctuate At the gearbox sight window the level will rise as a result of oil being thrown out of the secondary sump oil pan into the primary sump A satisfactory oil level is assured as long as it is visible ...

Page 11: ...r LIMITATIONS 12 All conditions being satisfactory to this point continue the run for about one hour Observe the vacuum and temperature rise periodically to make sure neither exceeds specified limits Continue to check for noises and hot spots and observe oil level behavior at the three sumps If trouble appears refer to the TROUBLESHOOTING CHECKLIST for suggested remedies The unit should now be rea...

Page 12: ...ngs It is very important to look for any changes or trends which might indicate pending problems D Check oil levels E Record hour meter readings 2 Monthly A Record bearing housing vibration levels at each bearing in the horizontal vertical and axial planes Use velocity in sec measurements and note any changes from previous readings Take a complete vibration signature amplitude versus frequency if ...

Page 13: ...high temperature areas then check for impeller contact at these points Look for excessive scale build up Correct blower mounting drive alignment Overheating of Bearings of Gears 11 12 13 14 15 Inadequate lubrication Excessive lubrication Excessive pressure rise Coupling misalignment Excessive belt tension Check oil sump levels in gearhouse and drive end covers Check oil levels If incorrect drain a...

Page 14: ...ll be erratic and unsteady 3 Damaged gears will generate vibrations at mesh frequency number of teeth times RPM 4 Damaged bearings will generate vibrations at ball pass frequency fundamental train frequency and ball spin frequency 5 Rotor unbalance and bent shaft will generate vibrations at 1XRPM 6 Blower driver coupling misalignment will generate vibrations at 1XRPM and 2XRPM 7 Acoustic resonance...

Page 15: ...r nameplate Repairs or adjustments to blowers should be performed by personnel with a good background of general mechanical experience and the ability to follow the detailed instructions in this manual Some operations involve extra care and a degree of precision work This is especially true in timing impellers and in handling bearings Experience indicates that a high percentage of bearing failure ...

Page 16: ...n at a time in either clockwise or counter clockwise sequence but not diametrically opposite sequence till the gear is unseated from the taper 6 If the gear does not come off using above method use hydraulic assist feature provided in the gear in addition to the above Hydraulic pump capable of generating about 20 000 PSI pressure is required Make sure all tubing and fittings are good for 40000 PSI...

Page 17: ...ront and back iden tifications will be interchanged Fronts may be defined as the lobes that tend to contact during rotation because of pressure load and gear tooth wear conversely backs are the surfaces that tend to separate 3 Determine and record the total lobe clearance by measuring the front and back clearances and adding them It will normally be satisfactory to take these measurements at the m...

Page 18: ...rotation In each seal kit there are 2 Clockwise CW Blue coated seals for inboard seal replacement 2 Counter Clockwise CCW Red coated seals for inboard seal replacement 1 Reversible CW CCW Green coated seal for drive shaft seal replacement 1 Protective Sleeve Tool Inboard seals 1 Protective Sleeve Tool Drive shaft seal CAUTION FOR SEALS TO PERFORM PROPERLY Use careful handling procedures so not to ...

Page 19: ...he shafts to obtain the required impeller positions Set the drive end clearance first after installing and tightening drive shaft end cover 58 if used 7 With feeler gauges carefully measure the spaces between the drive end bearing carrier flanges and the headplate face Insert shims 17 of correct thickness to fill these spaces The original shims should be correct if bearings and carriers have been ...

Page 20: ...RG 25 2 LOCKWASHER BRG 27 4 SEAL HDPLT 31 4 BEARINGS 60 1 BEARINGS 61 2 O RING 81 2 GASKETS 1 Set GEAR SCREWS V Belt kits only 12 kits and above SIZE REPAIR KIT NOS CPLG DRIVE REPAIR KIT NO V BELT DRIVE 10 RK10ACP00 RK10AVB00 12 RK12ACP00 RK12AVB00 14 RK14ACP00 RK14AVB00 16 RK16ACP00 18 RK18ACP00 20 RK20ACP00 WHEN ORDERING CONTACT Dresser Roots 900 West Mount Street Connersville IN 47331 1675 Phon...

Page 21: ...lug Drive end Fill Drain 29 2 Eyebolt Lifting 89 2 Locking Nut See 96 30 Varies Capscrew Gearbox Headplate Fig 90 2 Gauge Oil Level Drive End 31 4 Bearing Roller 91 34 1 Nameplate 92 1 Lube Nameplate Gear End 35 6 Drive Screw Nameplate Arrow 93 1 Lube Nameplate Drive Enc 36 8 or 0d Dowel Pin Flange Locating 94 Varies Manifold 37 1 Vent Plug Gearbox 95 42 Varies Capscrew Stub Shaft Soc Hd 96 2 Slin...

Page 22: ...DVJ WHISPAIR Dry Exhauster 23 Figure 15 Assembly of 10 thru 12 DVJ V V Belt Drive Splash Lube ...

Page 23: ...24 Dresser Roots Figure 16 Sectional Assembly of 10 thru 14 DVJ V Blowers ...

Page 24: ...DVJ WHISPAIR Dry Exhauster 25 Figure 17 Sectional Assembly of 16 20 DVJ Common Lube ...

Page 25: ...26 Dresser Roots Figure 18 Sectional Assembly of 1016 DVJ V Units ...