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Siemens 580, 680 Sleeve Bearing, 1120 Frame (See Figure 7), MAINTENANCE, SEALING PARTS, End Float – Sleeve Bearings

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Maintenance

Sleeve Bearing

1120 Frame (See Figure 7)

1.Check replacement bearings for nicks or shipping damage. Do not scrape.

2.Carefully remove the bearing housing cap by first lifting straight up, then pulling away from the bearing area.

3.Remove top half of bearing liner.

4.Remove the bolts at the split line of the oil ring, disengage the dowels, and remove the oil ring.

5.Remove bearing temperature probes if so equipped.

6.Raise the shaft slightly and support it.

7.Rotate the lower bearing half 180° and remove the lower half of the bearing liner.

8.Reassemble, reversing the steps above. Apply sealant. (See MAINTENANCE, SEALING PARTS for proper sealing of this bearing design).Be careful not to disturb or jam the seals when replacing the upper half of the bearing capsule.

9.Lubricate. Turn motor by hand to be sure of proper fit and oil ring operation.

10.Start motor without load and check oil ring operation.

End Float – Sleeve Bearings

Control of rotor end float in sleeve bearing motors is maintained in the drive end bearing. The total end float is 0.5 inch. On the 500, 580, 680 and 800 frames, the bearings are located axially by shims between the bearing bushing and the bearing capsule shoulders . On the 1120 frame, the shims are located between the bearing housing mounting flange and the bearing bracket. The shims permit the bearing to be adjusted axially to maintain coincidence of electrical and mechanical center. Any adjustment of the axial position of one bearing should be accompanied by the same axial adjustment of the opposite end bearing.

The coupling should limit the end float of the shaft to ±0.18 inch from the mechanical center. The limited end float coupling prevents the rotor from rubbing against the bearing shoulders during operation.

Figure 7. Sleeve Bearing Construction

1120 Frame.

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Contents

Page Table of Contents TABLE OF CONTENTS OPERATION SAFETY PROCEDURE INTRODUCTION Safety Procedures Qualified Person: Qualified Is trained and authorized to energize c.Is trained in rendering first aid Warranty Receiving Handling Temporary Storage Type Designations Ventilation Installation Motor Dimensions Location Select a location for the motor and driven unit that will: 2.Provide adequate space for motor removal without shifting the driven unit External Wiring Starting and overload control devices must be matched to motor rating. For safety or convenience they may need to be installed some distance from the motor Follow the control manufacturer’s instructions to make Angular Alignment Foot Plane To determine proper foot plane: V-Belts Hot Alignment Completing Mechanical Installation Doweling Doweling Inserting Dowel Pins Vibration Alarm Trip Timer Trip (Shutdown) Setting (1) Operation Initial Start Oil Circulating Systems For motors with oil circulating systems, proceed as follows before startup; 1.Fill motor reservoirs to normal level (see motor outline drawing) Trouble Shooting TROUBLE POSSIBLE CAUSES CORRECTION Page Maintenance Preventive Maintenance Maintenance Checklist Inspection Antifriction Bearing 1.Remove the parting bolts at the horizontal split Remove the bolts at the outer circumference of the upper half of the 3.Pull the upper bracket away from the face of the frame and remove bracket Sleeve Bearing - 1120 Frames 3.Air deflectors on sleeve bearing motors are horizontally split Vibration Most problems can be detected when inspected visually. Check for; 2.Accumulation of dirt on fan or rotor Associated equipment Foundation construction Insulation Resistance 2.3 + 1 = 3.3 (megohms) Drying Insulation 1.A warm air oven 2.Electric strip heaters Bearings Bearing Construction Insulated Bearings Antifriction Bearings Sleeve Bearings Oil Rings Oil Seals The primary purposes of the oil seal are: 1.To prevent the entrance of dirt into the bearing cavity 2.To retain the oil in the bearing cavity 3.To provide pressure regulation in the bearing cavity Sealing Parts Apply sealant as follows: Surfaces shall be clean of dirt, grease, and oil sealant. Use a gap when mating surfaces are together 4. Assemble parts 1.Ring out of round (should be round to 0.062 inch) 2.Fouling on a projection of the bearing bushing 5.Oil too cold or viscous, or oil level too high 6.Shaft not level – oil ring tends to bind Force Feed Lubrication Bearing Replacement For typical antifriction bearing configuration, see Figure The complete A.F.B.M.A 2.Identifying numerals and manufacturer stamped on the bearing Bearing tolerance class, i.e Sleeve Bearing Sleeve Bearing Replacement 500 and 580 Frames (See Figure 5) MAINTENANCE, SEALING PARTS 680 and 800 Frames (See Figure 6) 1120 Frame (See Figure 7) End Float – Sleeve Bearings Page Spare Parts Identification Parts Identification Siemens Industry Page Bearing Housing Bearing Bushing Oil Seal Oil Ring Air Seal Figure 11a. Types CGG & CAZ, 580 Frame Figure 11b. Types CGG & CAZ, 580 Frame Stator Core Internal Fan Stator Yoke Stator Coils Shaft Seal Page External End Cap TEAAC Heat Exchanger Motor, Auxiliary Blower Bearing Capsule Machine Seal Top Cover Bearing Liner Heat Exchanger Serial No Horsepower ______________ Type Speed Volts Amperes Vibration Analysis Sheet *Dominant Frequency Notes Siemens Industry