Bosch Rexroth IndraDyn S - MKE Project Planning Manual

86/131 Bosch Rexroth AG | Electric Drivesand ControlsRexroth MKE Synchronous Motors | Project Planning ManualOperating Conditions and Application NotesWearRadial shaft sealing rings are rubbing seals. Hence, they are subject to wearand generate frictional heat.Wear of the rubbing seal can be reduced only if lubrication is adequate and thesealing point is clean. Here, the lubricant also acts as a coolant, supporting thedischarge of frictional heat from the sealing point.●Prevent the sealing point from becoming dry and dirty. Always ensure adequatecleanliness.Under unfavorable ambient conditions (e.g. grinding dust, metalshavings), maintenance could be necessary.ResistanceVertical installation positionsIM V3Note on constructionThe materials used for the radial shaft sealing rings are highly resistant to oilsand chemicals. The performance test for the particular operating conditions lies,however, within the machine manufacturer’s responsibility.The degree of protection on the flange side of motors with a shaft sealing ringis IP 65. Hence, tightness is ensured only in case of splashing fluids. Fluidlevels present on the A-side require a higher degree of protection. If the motoris installed in vertical position (shaft pointing up), the instructions in the section”Design and Installation Positions” in this chapter must, in addition, be observed.Rexroth recommends that any direct contact of the drive shaft and the radialshaft sealing ring with the processing medium (coolant, material corrosion)caused by the machine or system construction should be avoided.9.10 Bearings and Shaft Load9.10.1 General9.10.2 Radial Load, Axial LoadDuring operation, both radial and axial forces act upon the motor shaft and themotor bearings. The construction of the machine, the selected motor type andthe attachment of driving elements on the shaft side must be adapted to oneanother to ensure that the load limits specified are not exceeded.Fig.9-17:Example of a shaft load diagram