Fluid machinery having stepped spirals with axial pushing means for the moving spiral
AssigneeKabushiki Kaisha Toshiba
InventorsHirotsugu Sakata, Makoto Hayano
Life of this patent
Estimating the term…
Abstract
A fluid machinery is provided which comprises a stationary spiral having an inner engaging surface, and a moving spiral having an outer engaging surface which is engaged with the inner engaging surface and is rotated upon an axis line X relatively to the stationary spiral. A working chamber which rises spirally from an outer periphery to a center portion with a reduction in volume can be formed by engaging the outer engaging surface with the inner engaging surface, and the moving spiral can be pushed along the axis line X by use of gas pressure, etc.
Claims22
A fluid machinery comprising:
- a stationary spiral having an inner engaging surface that rises spirally from its inner periphery to its center and has a stepwise sectional shape;
- a moving spiral having an outer engaging surface that rises spirally from its outer periphery to its center and has a stepwise sectional shape, the moving spiral being rotatable about an axis relative to the stationary spiral;
- a plurality of working chambers formed between the outer engaging surface of the moving spiral and the inner engaging surface of the stationary spiral, the working chambers decreasing in volume as the working chambers approach toward the center of the stationary spiral;
- pushing means for pushing the moving spiral toward the stationary spiral along the axis;
- a spiral sealing member provided between the inner engaging surface of the stationary spiral and the outer engaging surface of the moving spiral, for sealing and isolating the working chambers from one another,
- wherein the pushing means urges the outer engaging surface of the moving spiral against the inner engaging surface of the moving spiral to improve sealing and isolate the working chambers from one another during normal operation, and wherein the pushing means allows the moving spiral to move away from the stationary spiral against the urging of the pushing means when the working chambers are at an abnormally high pressure to reduce pressure in the working chambers.
A fluid machinery comprising:
- a stationary spiral having an inner engaging surface that rises spirally from its inner periphery to its center and has a stepwise sectional shape, wherein the stationary spiral is composed of an anti-stationary spiral;
- a moving spiral having an outer engaging surface that rises spirally from its outer periphery to its center and has a stepwise sectional shape, the moving spiral being rotatable about an axis relative to the stationary spiral;
- a working chamber formed between the outer engaging surface of the moving spiral and the inner engaging surface of the stationary spiral, the working chamber decreasing in volume as the working chamber approaches toward the center of the stationary spiral;
- pushing means for pushing the moving spiral along the axis toward the anti-stationary spiral;
- a supporting frame for supporting the stationary and moving spirals and having a contact surface;
- an annular receiving portion on the supporting frame for supporting a rear surface of the moving spiral, the annular receiving portion having a partially notched bottom surface;
- annular sealing member provided between an outer peripheral surface of the annular receiving portion and the contact surface of the supporting frame;
- and
- an energizing member provided between the partially notched bottom surface of the receiving portion and the supporting frame.
Dependencies are inferred from the claim text.