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Vertical motors: Bearing configurations and oil leaks

  • June 2012
  • Number of views: 7710
  • Article rating: 5.0
Article

The bearing construction of a vertical motor determines the definite purpose application of the machine. The difference between a vertical motor and a horizontal motor mounted vertically is the bearing configuration. A vertical motor has thrust bearings, except in the case of some close-coupled pumps; a horizontal motor rarely does. Typically a vertical motor is used to drive a pump and will have a P-base mount without feet. A horizontal motor may have a footed or footless mount with a C or D flange, or no flange. The thrust bearing is usually at the top of the vertical motor and may consist of one or more angular contact bearings, a spherical roller bearing or a hydrodynamic, plate type bearing. The thrust applied by the external load will determine the type and number of bearings used. The thrust may be manifest in upward or downward axial loading or it may be balanced. It is important to correctly apply the thrust bearing configuration to achieve the best service life and performance.

Discussion also covers:

  • Bearings at the top of the motor
  • Vertical motor thrust bearings
  • Special thrust case
  • Potential for oil leaks
  • Preventing condensation

Getting The Most From Your Electric Motors

Getting The Most From Your Electric Motors - coverThis 40-page booklet provides great advice for obtaining the longest, most efficient and cost-effective operation from general and definite purpose electric motors.

This booklet covers topics such as:

  • Installation, startup and baseline information
  • Operational monitoring and maintenance
  • Motor and baseline installation data
  • How to read a motor nameplate
  • Motor storage recommendations

LEARN MORE AND DOWNLOAD MÁS INFORMACIÓN Y DESCARGAR BUY PRINTED COPIES

READ MORE ABOUT THE FEATURES AND BENEFITS

EASA/AEMT Rewind Study

EASA Rewind Study cover

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.

DOWNLOAD THE FULL RESULTS

ANSI/EASA AR100-2020

ANSI/EASA AR100-2015 cover

Recommended Practice for the Repair of Rotating Electrical Apparatus
This is a must-have guide to the repair of rotating electrical machines. Its purpose is to establish recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

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EASA Technical Manual

EASA Technical Manual cover

Revised September 2022
The EASA Technical Manual is the association's definitive and most complete publication. It's available FREE to members in an online format. Members can also download PDFs of the entire manual or individual sections.

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