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Metal Working

Variable-characteristic-thrust-bearing

Grilles for air conditioning

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Variable characteristic thrust bearing

Details

Inventors: Ide, Russell D.;
Assignee:
Primary Examiner: Footland; Lenard A.
Assistant Examiner:
Attorney, Agent or Firm: Bednarek; Michael D.

A hydrodynamic bearing which includes a carrier and a plurality of bearing pads circumferentially spaced about the carrier. The carrier is formed with a series of circumferentially spaced groups of pad support openings. Each group of pad support openings includes two or more pad support openings each of which is capable of supporting a pad, but only one of which supports a pad at any one time. The carrier is designed such that the openings formed therein are supported as sets of supports such that each group of openings includes one opening of each set of openings. The carrier supports the openings such that the support of each opening within each set is substantially identical to that of the other openings in its set, but different than the support of the openings of other sets such that each set of bearing pad openings is adapted to support bearing pads for a distinct characteristic deflection.

DETAILED DESCRIPTION The present invention relates to a thrust bearing which can be constructed of standardized parts to operate acceptably for various dramatically different operating conditions.
More specifically, the present invention is directed to a thrust bearing which includes a carrier and a number of bearing pads supported in the carrier.
The carrier is a one piece generally circular member having an axis which is coincident with the axis of the rotating shaft to be supported.
The carrier is formed with a series of groups of pad support openings circumferentially spaced above the axis of the carrier.
Each group of pad support openings includes two or more openings, only one of which receives a pad at any one time.
The carrier includes a support structure for supporting each of the groups of pad support openings in an identical manner, but supporting each opening within each group for different deflection under low load.
By virtue of this construction, the deflection of the bearings under load depends on the opening in which the pad is located.
The construction of the present invention provides two significant advantages.
First, a standard carrier and standard set of pads may be used to achieve widely varying performance characteristics under load.
Thus, for example, a single type of carrier and pad can be assembled to provide to a low load type bearing or a high load type bearing.
Second, the standard components can be assembled to form a multi-mode bearing which operates optimally under two or more distinct sets of operating conditions, i.
e.
, modes of operation.
This is done by locating the standard pads in different openings among the groups of openings.
For example, one set of pads could be located in the first opening of each group of openings while a second circumferentially spaced set of pads could be located in the second opening of others of the groups of openings.
The pads of each type would, be circumferentially spaced i.
e.
, evenly distributed around the circumference of the carrier

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