Thermally compensated scroll machine
View Patent ↗A compressor may include first and second scroll members and a compensation member. The first scroll member may include a first end plate and a first spiral wrap extending therefrom. The second scroll member may include a second end plate and a second spiral wrap. The second end plate may be positioned proximate to a distal end of the first spiral wrap. The first end plate may be positioned proximate to a distal end of the second spiral wrap. The compensation member may engage the first scroll member and having a first reaction to a temperature change causing the first scroll member to maintain a sealed relationship between the first end plate and the distal end of the second spiral wrap.
1. A compressor comprising:
a first scroll member including a first end plate and a first spiral wrap extending therefrom;
a second scroll member including a second end plate and a second spiral wrap, said second end plate being positioned proximate to a distal end of said first spiral wrap, said first end plate being positioned proximate to a distal end of said second spiral wrap; and
an annular ring engaging said first scroll member and applying a load thereon that deforms said first end plate to compensate for deformation of said second spiral wrap.
2. The compressor of claim 1 , wherein deformation of said first scroll member to compensate for deformation of said second spiral wrap allows a sealed relationship to be maintained between said first end plate and said second spiral wrap.
3. The compressor of claim 1 , wherein said first scroll member includes a first material having a first coefficient of thermal expansion and said annular ring includes a second material having a second coefficient of thermal expansion that is greater than said first coefficient of thermal expansion.
4. The compressor of claim 1 , wherein said load is caused by differing rates of thermal expansion of said annular ring and said first scroll member in response to said annular ring and said first scroll member being exposed to a rise in temperature.
5. The compressor of claim 1 , wherein said annular ring is disposed in an annular groove in said first scroll member.
6. The compressor of claim 1 , wherein said annular ring engages a periphery of said first scroll member.
7. The compressor of claim 1 , wherein said distal end of said first spiral wrap is substantially planar before and after application of said load.
8. A compressor comprising:
a first scroll member including a first end plate and a first spiral wrap extending therefrom;
a second scroll member including a second end plate and a second spiral wrap and
a compensation member deforming said first scroll member to compensate for deformation of said second scroll member.
9. The compressor of claim 8 , wherein said first scroll member is a non-orbiting scroll member.
10. The compressor of claim 8 , wherein said compensation member includes an annular ring.
11. The compressor of claim 8 , wherein said first scroll member is pressure biased against said second scroll member.
12. The compressor of claim 8 , wherein said compensation member includes a copper-based material.
13. The compressor of claim 8 , wherein said compensation member includes a ferrous-based material with an austenitic structure.
14. The compressor of claim 8 , wherein said compensation member includes a high nickel alloy material.
15. The compressor of claim 8 , wherein said compensation member includes a filament wound carbon fiber based composite material.
16. The compressor of claim 8 , wherein said first scroll member defines an internal diameter and said compensation member is an annular ring secured within said internal diameter.
17. The compressor of claim 8 , wherein said compensation member includes a plurality of thermal actuators.
18. The compressor of claim 17 , wherein said plurality of thermal actuators are circumferentially spaced around said first scroll member.
19. The compressor of claim 17 , wherein at least one of said plurality of thermal actuators utilizes a material phase change.
20. The compressor of claim 17 , wherein at least one of said plurality of thermal actuators includes a memory material.
21. The compressor of claim 8 , wherein said compensation member engages said first scroll member and has a first reaction to a temperature change causing said first scroll member to maintain a sealed relationship between said first end plate and a distal end of said second spiral wrap.
22. The compressor of claim 21 , wherein said first scroll member includes a material having a second reaction to temperature change and said first reaction to temperature change is greater than said second reaction to temperature change.
23. The compressor of claim 21 , wherein said first reaction to said temperature change deflects said first end plate from a planar shape to a concave shape.
24. The compressor of claim 21 , wherein said first end plate includes a discharge passage extending therethrough and said sealed relationship exists between a central portion of said first end plate adjacent said discharge passage and a central portion of said distal end of said second spiral wrap.