Apparatus for monitoring the axial and radial wear on a bearing of a rotary shaft

• US 5,198,763 A
• Filed: 06/30/1992
• Issued: 03/30/1993
• Est. Priority Date: 02/20/1990
• Status: Expired due to Term

• Current Assignee: Nikkiso Company Limited
• Original Assignee: Nikkiso Company Limited
• Inventors: Konishi, Yoshiaki
• Primary Examiner(s): Strecker, Gerard R.
• Application Number:
  US07/908,546
• Time in Patent Office: 273 Days
• Field of Search: 324/165, 324/173-175, 324/207.11, 324/207.14-207.16, 324/207.22, 324/207.23, 324/207.24, 324/207.25, 324/207.26, 340/870.31, 250/231.13, 356/373, 356/375
• US Class Current: 324/207.23
• CPC Class Codes: G01B 7/02 for measuring length, width or thickness G01B7/004, G01B7/12 take precedence
• CPC Class Codes: G01B 7/14 for measuring distance or clearance between spaced objects or spaced apertures G01B7/30 takes precedence
• CPC Class Codes: G01B 7/30 for measuring angles or tapers; for testing the alignment of axes
• CPC Class Codes: G01M 13/04 Bearings

Abstract

Apparatus for monitoring the axial and radial wear on a bearing of a rotary shaft, comprising a slide bearing supporting the shaft for axial movement parallel to an axis of rotation of the shaft in the bearing, and a detector to detect an axially displaced position of the rotary shaft. A detector is also provided for detecting a radially displaced position of the shaft, and the axial and radial positions of the shaft are simultaneously displayed, thereby to indicate axial and radial wear of the bearing. A detector is also provided for detecting and displaying the direction of rotation of the shaft. The device for detecting radial displacement of the shaft comprises a fixed distance detector for detecting the distance between the distance detector and the shaft.

Claims

1. Apparatus for monitoring the axial and radial wear on a bearing of a rotary shaft, comprising means supporting a said rotary shaft on a slide bearing for axial movement parallel to an axis of rotation of said shaft in said bearing, single detecting means to detect both an axially displaced position of said rotary shaft and a radially displaced position of said shaft, said single detecting means comprising fixed distance detecting means for detecting a distance between said distance detecting means and said shaft, thereby to detect radial displacement of said shaft, and for detecting, between two non-parallel contours on said shaft, a distance that varies lengthwise of said shaft, thereby to detect axial displacement of said shaft, said two non-parallel contours on said shaft comprising grooves recessed within a cylindrical side wall of a cylindrical recess in an end of said shaft, said single detecting means being fixedly mounted in spaced relation to said side wall on a fixed member disposed within said recess, and means responsive to the detection of said distances by said detecting means simultaneously to display said axial and radial positions of said shaft thereby to indicate axial and radial wear of said bearing.