Radial load reducing device, and sliding bearing and screw compressor using the device

• US 4,989,997 A
• Filed: 02/01/1990
• Issued: 02/05/1991
• Est. Priority Date: 07/28/1989
• Status: Expired due to Fees

• Current Assignee: Klaus Schmidt
• Original Assignee: Klaus Schmidt
• Inventors: Yoshimura, Shoji
• Primary Examiner(s): Hannon, Thomas R.
• Application Number:
  US07/473,407
• Time in Patent Office: 369 Days
• Field of Search: 384/101, 384/102, 384/114, 384/116, 384/118, 384/126
• US Class Current: 384/100
• CPC Class Codes: F01C 21/02 Arrangements of bearings bearing constructions F16C
• CPC Class Codes: F04C 18/16 with helical teeth, e.g. chevron-shaped, screw type for non-parallel axes of movement F04C18/48
• CPC Class Codes: F04C 29/0021 Systems for the equilibration of forces acting on the pump interstice adjustment other than by fluid pressure F01C21/102
• CPC Class Codes: F16C 2360/43 Screw compressors in general F04C
• CPC Class Codes: F16C 32/0659 of pockets or grooves
• CPC Class Codes: F16C 39/04 using hydraulic or pneumatic means

Abstract

A radial load reducing device includes a high-pressure fluid chamber defined to face an outer circumferential portion of a rotating shaft or an outer circumferential portion of a rotating body integrally rotating with the rotating shaft at a first position where a radial load to be applied to the rotating shaft is directed, and a low-pressure fluid chamber defined to face the outer circumferential portion at a second position opposite to the first position. Further, a sliding bearing and a screw compressor using the above device are also provided. The fluid pressure in the high-pressure fluid chamber is applied in a direction counter to the direction of application of the radial load to be applied to the rotating shaft, thereby reducing the radial load to be applied to the rotating shaft.

Claims