The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 1996
Filed:
Jul. 13, 1994
Richard R Shultz, Groton, CT (US);
Glacier RPB Inc., Mystic, CT (US);
Abstract
A damping arrangement 25 (FIG. 1) for damping axial vibrations in a shaft suspended (optionally) by a magnetic bearing has a radially extending thrust face 24 mounted on the shaft and separated by a small face gap 29 from a housing 30 and through which gap a stream of gas is forced by way of a flow restrictor 31 at the entrance to the gap. The flow restrictor acts with thrust face 26 to define a gap entrance related to the axial position/displacement of the shaft. A chamber 33, defined downstream of the restrictor and having exhaust passage 35, opens at neck 34 to face the thrust face and the gas pressure therein exerts axial thrust on the shaft. Axial vibration of the shaft modulates gas supply to the face gap and the chamber is dimensioned to create a phase lead of 90.degree. for the instantaneous pressure therein and axial thrust on the shaft, thus damping the shaft vibrations causing its displacement.