Compressor having thrust bearing mechanism

Details Compressor having thrust bearing mechanism Compressor having thrust bearing mechanism

1999-10-05

2001-02-13

Denion, Thomas (Department: 3748)

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

Reexamination Certificate

active

06186754

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATION
This application is based on and incorporates herein by reference Japanese Patent Application Nos. Hei. 10-289771 filed on Oct. 12, 1998 and Hei. 10-337934 filed on Nov. 27, 1998.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a compressor suitable for use in a super-critical refrigerating cycle in which a discharge pressure of the compressor is higher than a refrigerant critical pressure.
2. Description of Related Art
JP-A-57-148087 discloses a scroll-type compressor used for a refrigerating cycle. In this scroll-type compressor, a spherical roller receives a thrust force. The thrust force is an element force of the compression counter-force acting on a movable scroll, which is perpendicular to the orbital direction of the movable scroll. The spherical roller rolls to support and allow the movable scroll to orbit.
A discharge pressure of a compressor in a super-critical refrigerating cycle is 7-10 times higher than that in a conventional refrigerating cycle using a flon as a refrigerant.
Therefore, when the compressor disclosed in JP-A-57-148087 is applied to the super-critical refrigerating cycle, because a contact surface pressure of the spherical roller is large, the spherical roller and a surface contacting the roller can be damaged, thereby reducing the reliability and durability of the compressor.
To address this problem, it is considerable to enlarge the diameter of the spherical roller can be damaged or the number of rollers increased. However, this causes the compressor to be enlarged.
SUMMARY OF THE INVENTION
An object of the present invention is to suppress an enlargement of a compressor and improve the reliability and durability thereof.
According to a first aspect of the present invention, a thrust bearing mechanism receives a thrust force which is an element force of a compression counter-force acting on a movable member, and which is perpendicular to the orbital direction of the movable member. The thrust bearing mechanism includes a plurality of substantially cylindrically-shaped rollers. The contact surface area of the rollers is larger than that in the prior art in which spherical rollers receive the thrust force. Thus, the rollers and the surface contacting the rollers are efficiently prevented from being damaged, while suppressing the compressor from being enlarged, and improving the reliability and durability of the compressor.
According to a second aspect of the present invention, a thrust bearing mechanism receives a thrust force which is an element force of a compression counter-force acting on a movable scroll member, and which is perpendicular to the orbital direction of the movable scroll member. The thrust bearing mechanism includes a first substantially cylindrically-shaped roller to rotate in one direction, and a second substantially cylindrically-shaped roller to rotate perpendicularly to the first roller. Thus, as in the first aspect of the present invention, the compressor is suppressed from being enlarged, and the reliability and durability of the compressor are improved.


REFERENCES:
patent: 4415318 (1983-11-01), Butterworth et al.
patent: 4460321 (1984-07-01), Terauchi
patent: 4545746 (1985-10-01), Sugimoto et al.
patent: 4548556 (1985-10-01), Terauchi
patent: 4552517 (1985-11-01), Shimizu
patent: 4589828 (1986-05-01), Sato et al.
patent: 4934909 (1990-06-01), Suzuki et al.
patent: 0049881 (1982-04-01), None
patent: 57-148087 (1982-09-01), None
patent: 57-148091 (1982-09-01), None
patent: 61-241479 (1986-10-01), None
patent: 62-147070 (1987-07-01), None
patent: 63-057887 (1988-03-01), None
patent: 63-179186 (1988-07-01), None
patent: 2-264173 (1990-10-01), None
patent: 4-284193 (1992-10-01), None
patent: 5-195965 (1993-08-01), None

Affiliated with

Also associated with

Rating

Compressor having thrust bearing mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compressor having thrust bearing mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compressor having thrust bearing mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2569062