Rotatable assembly with rotor abraded by seal ring

• US 3,961,867 A
• Filed: 03/27/1974
• Issued: 06/08/1976
• Est. Priority Date: 04/06/1973
• Status: Expired due to Term

• Current Assignee: Holset Engineering Co Ltd. (Cummins Incorporated)
• Original Assignee: Holset Engineering Co Ltd. (Cummins Incorporated)
• Inventors: Woollenweber, William E.
• Primary Examiner(s): Croyle, Carlton R.
• Assistant Examiner(s): Ross, Thomas I.
• Application Number:
  US05/455,068
• Time in Patent Office: 804 Days
• Field of Search: 417/407, 417/408, 417/409, 415/111, 415/110, 415/170 A, 415/172, 415/174, 277/94, 277/83, 277/178, 277/81 R, 418/178
• US Class Current: 417/407
• CPC Class Codes: F01D 5/025 Fixing blade carrying members on shafts attachment of a member on a shaft in general F16D1/06; for non-positive displacement pumps F04D29/00
• CPC Class Codes: F02C 6/12 Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• CPC Class Codes: F04D 29/057 hydrostatic; hydrodynamic

Abstract

A rotatable assembly is provided which is adapted to be used in centrifugal compressors, expanders, or the like. The assembly includes a rotor rotatably mounted within a housing. The rotor is provided with an axially extending sleeve portion having an external annular groove and an axially extending bore terminating within the rotor. One end of a rotatably mounted shaft is accommodated within the sleeve bore. A stationary backing plate is disposed within the housing and encompasses the sleeve portion. The plate is provided with a stepped bore through which the sleeve extends. The stepped bore has a large diameter portion and a small diameter portion, the latter being located between the sleeve external groove and the end face of the sleeve. An annular seal means is disposed within the sleeve external groove and sealingly engages the large diameter portion of the plate stepped bore.

Claims

1. A high speed rotatable assembly comprising a housing;

a rotor rotatably mounted within said housing, said rotor having an axially extending sleeve portion provided with an axial bore and an external groove;

a shaft rotatably mounted within said housing and having one end thereof disposed within said sleeve bore;

a backing plate attached to the housing interior surface, said plate being provided with a stepped bore through which said rotor sleeve portion extends, said stepped bore having a large diameter portion and a small diameter portion, the latter forming a step located intermediate the sleeve external groove and the open end of the sleeve bore;

seal means disposed within said sleeve external groove and encompassing said sleeve exterior and frictionally engaging the large diameter portion of said plate stepped bore, said seal means having greater wear-resistant characteristics than that of the sleeve portion defining said external groove accommodating said seal means, said seal means having one end face thereof subjected to pneumatic forces urging said seal means towards said step when said rotor is rotating; and

thrust bearing means disposed intermediate said sleeve portion and an abutment on said shaft.

2. The rotatable assembly of claim 1 wherein the shaft one end terminates within the sleeve and threadably engages the sleeve axial bore.

3. The rotatable assembly of claim 2 wherein the sleeve axial bore has an internally threaded first portion and a second portion of reduced diameter;

said first portion being disposed between said second portion and the open end of said sleeve bore.

4. The rotatable assembly of claim 1 wherein said seal means upon rotation of said rotor has a second end face thereof in sliding engagement with one side of said external sleeve groove until said second end face engages said bore step.