Sealing ring for a centrifugal separator

• US 4,534,570 A
• Filed: 03/29/1984
• Issued: 08/13/1985
• Est. Priority Date: 04/05/1983
• Status: Expired due to Fees

• Current Assignee: ALFA Laval AB
• Original Assignee: ALFA Laval AB
• Inventors: Munde, Jan
• Primary Examiner(s): Smith, Robert I.
• Application Number:
  US06/594,986
• Time in Patent Office: 502 Days
• Field of Search: 277/174, 277/173, 277/177
• US Class Current: 277/399
• CPC Class Codes: B04B 1/14 with periodical discharge
• CPC Class Codes: F16J 15/022 characterised by structure or material

Abstract

A sealing ring (5) which is intended to seal between two relative to each other axially movable parts (2, 7) of the rotor of a centrifugal separator, and which has edges bevelled such that it can be impressed in its sealing surface only when the recesses formed by the bevelling have been filled up by material from the sealing ring as a result of plastic deformation of the latter by compression between the rotor parts (2, 7).

Claims

1. A centrifugal separator comprising a rotor mounted for rotation about an axis, the rotor having a first part provided with an annular groove surrounding said axis, the rotor also having a second part provided with an annular projection surrounding said axis and toward which said groove opens through an annular opening of the groove, said projection having opposite the annular groove an annular abutment surface which is of smaller radial dimension and therefore narrower than said annular opening of the groove, said second rotor part being movable axially toward and away from said first rotor part, and a sealing ring of plastically deformable material located in the groove and having an annular sealing surface engageable by said annular abutment surface upon movement of said second rotor part toward said first rotor part, a portion of said ring closest to said abutment surface having annular bevelled edges at opposite sides of said annular sealing surface, whereby the ring has a cross-section which, at said closest portion, tapers toward said projection, said annular abutment surface having a radial dimension which is at least as large as the radial dimension of said annular sealing surface, whereby said annular abutment surface is at least as wide as said annular sealing surface.

2. The centrifugal separator of claim 1, in which said annular abutment surface has a larger radial dimension than said annular sealing surface.

3. The centrifugal separator of claim 1, in which said bevelled edges coact with opposing walls of the groove to form annular recesses, said annular abutment surface being operable to force parts of the ring into said recesses.

4. The centrifugal separator of claim 3, in which said annular sealing surface of the ring lies outside the groove.