Compression device and scroll compressor using such a compression device
AssigneeLiebherr-Aerospace Toulouse SAS
InventorEric MONET
Life of this patent
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Abstract
A compression device includes at least: two interleaved scrolls each of which is made of an aluminum alloy, one of the scrolls, being a fixed scroll (3), and is fixed and the other scroll, which is an orbiting scroll and moves eccentrically without rotating. Also included are anti-rotation means made of an aluminum alloy and configured to allow anti-rotation of the orbiting scroll. The compression device also includes one flat thrust bearing configured to axially contain the orbiting scroll and is made of aluminum alloys or grades of cast iron. The compression device also includes coatings for promoting friction between the fixed scroll, the orbiting scroll, the anti-rotation means and the flat thrust bearing.
Claims12
Compression device comprising at least:
- two interleaved scrolls (3, 5) and each of which is made of an alloy with a density less than 5, wherein one of the scrolls, referred to as the fixed scroll (3), is fixed and the other scroll, referred to as the orbiting scroll (5), moves eccentrically without rotating,
- anti-rotation means made of an aluminum alloy and suitable for allowing anti-rotation of said orbiting scroll (5), and
- a flat thrust bearing (7) suitable for axially retaining the orbiting scroll (5), wherein the surface of the scroll configured to come into contact with the flat thrust bearing is covered with a thick coating, with a thickness between 40 and 200 μm, with a hardness greater than 1100 HV and mostly comprised of an oxide coming from the alloy.
Dependencies are inferred from the claim text.