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US 2009/0022613 A1Published application
Asynchronous non-constant-pitch spiral scroll-type fluid displacement machine
OwnerZhihuang DAI, Zhengzhi ZHANinventors
Life of this patent
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Abstract
A scroll-type spiral fluid displacement machine having at least one pair of interfitting scroll elements. The scroll vanes of the scroll elements are constructed upon a base line spiral defined by the equation: L=K0φK1e−φ/K2 where L is the distance from the spiral's origin to any point on the spiral curve, φ is the angular displacement of the spiral, K0 is a constant greater than 1, K1, is a constant greater than 1, and K2 is a constant greater than 10.
Claims8
A scroll-type fluid displacement device comprising:
- a first scroll and a second scroll, each scroll having an end plate from which a spiral projects transversely from the end plate;
- said first scroll and said second scroll being opposingly arranged to interfit said spirals;
- said spirals being opposingly symmetrical about a central axis;
- a base line for each spiral be defined by the equation:
- L=K0φK1e−φ/K2
- wherein L is the distance from said central axis to any point on the base line curve, φ is the angular displacement of the base line curve, Ko is a constant greater than 1, K1 is a constant greater than 1, and K2 is a constant greater than 10.
3 more elements
A method of designing scroll elements for a scroll-type fluid displacement device, the steps comprising:
- designing a base line spiral for first and second scroll elements, the base line spiral being defined by the equation:
- L=K0φK1e−φ/K2
- wherein L is the distance from a central axis to any point on the base line curve, φ is the angular displacement of the base line curve, Ko is a constant greater than 1, K1, is a constant greater than 1, and K2 is a constant greater than 10;
- designing inner and outer spirals to define spiral walls that create fluid pockets having a desired change in volume when said first and second scroll elements are fit and orbitally rotated together in the scroll-type fluid displacement device.
1 more element
Dependencies are inferred from the claim text.