Adjustable locking shaft-locating device

摘要

A shaft-locating device can include a cylindrical inner collet having an engaging surface on an inner diameter and an outward-facing tapered portion on an outer surface and an outer nut, concentrically located around the inner collet. The outer nut can have an inward-facing tapered portion that engages the outward-facing tapered portion of the inner collet, causing the inner diameter of the inner collet to become smaller, thus engaging, for example, a shaft around which the inner collet is located. In embodiments, a shoulder on the inner collet can prevent axial movement of a shaft-mounted component such as, for example, a bearing.

主权项

1. An electrical submersible pump assembly, comprising:
a pump having a housing, a longitudinal axis and a plurality of pump stages, each of the stages having an impeller and a diffuser; a shaft extending through the housing along the axis, the impellers being carried on the shaft for rotation therewith; an axial alignment groove formed in an outer surface of the shaft; upper and lower radial support bearings in the housing above and below the pump stages, respectively, through which the shaft extends; a motor operably coupled with the shaft for rotating the shaft; a plurality of shaft-locating devices one of the shaft-locating devices being located above and in abutment with an upper side of one of the support bearings, and another of the shaft-locating devices being located below and in abutment with a lower side of one of the support bearings for restricting axial movement of the shaft in the housing relative to the support bearings, each of the shaft-locating devices comprising: a cylindrical inner collet having an engaging surface on an inner diameter through which the shaft extends and an outward-facing tapered portion on an outer surface; an outer nut, concentrically located around the inner collet, the outer nut having an inward-facing tapered portion on an inner surface, at least a portion of the inward-facing tapered portion having an inner diameter that is smaller than at least a portion of an outer diameter of the outward-facing tapered portion; and wherein when the outer nut is axially moved from a first position to a second position relative to the inner collet, the inward-facing tapered portion of the outer nut urges the outward-facing tapered portion inward, so that the engaging surface moves radially inward toward an axis of the inner collet, frictionally gripping the shaft to prevent axial movement of the shaft locating device relative to the shaft.