Back to results
US 2018/0187678 A1Published application
Austempered grey iron scroll and method of making thereof
AssigneeTrane International Inc.
InventorGeorge Hansen
Life of this patent
Estimating the term…
Abstract
A scroll compressor includes scroll members that are made of austempered grey iron in whole or in part. The austempering process can increases fatigue strength and toughness of a grey iron while maintaining its good machinability and vibration damping characteristics. Use of austempered grey iron scroll members allows the scroll compressor to improve its capacity, efficiency, and durability.
Claims18
A scroll compressor, comprising:
- a fixed austempered grey iron scroll member;
- an orbiting austempered grey iron scroll member;
- a motor connecting and driving a drive shaft;
- a crank pin connecting the drive shaft to the orbiting austempered grey iron scroll member through a bearing;
- a discharge port in fluid communication with the fixed austempered grey iron scroll member;
- and
- a shell hermetically sealing the scroll compressor,
- wherein each of the fixed austempered grey iron scroll member and the orbiting austempered grey iron scroll member includes an austempered grey iron wrap,
- the orbiting austempered grey iron scroll member is constrained to orbit relative to a fixed austempered grey iron scroll member,
- rotation of the drive shaft and the crank pin draws the orbiting austempered grey iron scroll member around in an orbital path, and
- orbiting motion of the orbiting austempered grey iron scroll member relative to the fixed austempered grey iron scroll member creates pockets to compress the refrigerant.
8 more elements
A method for preparing an austempered grey iron scroll member, comprising:
- austenitizing a grey iron scroll at a temperature of about 600° C.-about 1000° C. to obtain an austenitized grey iron scroll;
- and
- austempering the austenitized grey iron scroll at a temperature of about 250° C.-about 471° C. for about 30 minutes-about 4 hours.
A method for preparing an austempered grey iron scroll member, comprising:
- austenitizing a grey iron at a temperature of about 600° C.-about 1000° C. to obtain an austenitized grey iron;
- austempering the austenitized grey iron at a temperature of about 250° C.-about 471° C. for about 30 minutes-about 4 hours to obtain an austempered grey iron;
- and
- making an austempered grey iron scroll member from the austempered grey iron.
1 more element
Dependencies are inferred from the claim text.