Low vibration scroll compressor for aircraft application

Patent metadata

Field	Value
Publication number	US-9790942-B2
Application number	US-201514832185-A
Country	US
Kind code	B2
Filing date	Aug 21, 2015
Priority date	Aug 21, 2015
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A scroll compressor includes a fixed scroll; an orbiting scroll that interfaces the fixed scroll; an Oldham ring that interfaces the orbiting scroll and has a pre-unbalanced force profile; and a motor shaft that interfaces the Oldham ring. The Oldham ring pre-unbalanced force profile is in the form of a sine wave. One of the shaft and the orbiting scroll has an imbalance weight portion; wherein the imbalance weight portion provides a weighted force profile that is 180° opposite of the pre-unbalanced force profile of the Oldham ring and produces in the Oldham ring a post-unbalanced force profile that is substantially a flat line.

First claim

We claim:

1. A scroll compressor, comprising:
a fixed scroll;
an orbiting scroll that interfaces the fixed scroll;
an Oldham ring that interfaces the orbiting scroll and has a pre-unbalanced force profile;
a motor shaft that interfaces the Oldham ring;
wherein one of the motor shaft and the orbiting scroll has an imbalance weight portion;
wherein the imbalance weight portion:
has a weighted force profile that is about 175° to about 185° opposite of the pre-unbalanced force profile of the Oldham ring; and
produces in the Oldham ring a post-unbalanced force profile that is substantially a flat line.

2. The compressor according to claim 1 , further comprising a swing link that is intermediate the motor shaft and Oldham ring; and
wherein one of the motor shaft, the orbiting scroll, and the swing link has the imbalance weight portion.

3. The compressor according to claim 1 , further comprising a second imbalance weight portion in one of the orbiting scroll and the motor shaft.

4. The compressor according to claim 1 , wherein the orbiting scroll includes a base portion; and
wherein the imbalance weight portion is in the base portion.

5. The compressor according to claim 3 , wherein the imbalance weight portion is one of a reduced thickness and a surface irregularity of the base portion.

6. The compressor according to claim 1 , wherein the orbiting scroll includes a base portion; and
wherein the imbalance weight portion is in a part of the orbiting scroll other than in the base portion.

7. The compressor according to claim 1 , wherein the pre-unbalanced force profile of the Oldham ring is a sine wave.

8. A scroll compressor, comprising:
a fixed scroll;
an orbiting scroll having a base portion, wherein the orbiting scroll interfaces the fixed scroll;
an Oldham ring that interfaces the orbiting scroll and has a pre-unbalanced force profile in the form of a sine wave;
a motor shaft having a plate portion, wherein the motor shaft interfaces the Oldham ring;
wherein the plate portion of the motor shaft and the base portion of the orbiting scroll define boundaries of an imbalance weight area;
wherein the imbalance weight area includes an imbalance weight portion having a mass characterization that is equal to about 45% to about 55% of a mass of the Oldham ring;
wherein the imbalance weight area converts the Oldham ring pre-unbalanced force profile to an Oldham ring post-unbalanced force profile that is in the form of a substantially flat line.

9. The compressor according to claim 8 , wherein the imbalance weight portion is in the base portion of the orbiting scroll.

10. The compressor according to claim 8 , wherein the imbalance weight portion is in an area of the orbiting scroll other than in the base portion.

11. The compressor according to claim 8 , wherein the imbalance weight portion is in the plate portion of the motor shaft.

12. The compressor according to claim 8 , wherein the imbalance weight portion is in an area of the motor shaft other than in the plate portion.

13. The compressor according to claim 8 , further comprising a plurality of imbalance weight portions in the imbalance weight area.

14. The compressor according to claim 8 , further comprising a swing link in the imbalance weight area, and
wherein the imbalance weight portion is in one of the orbiting scroll, the motor shaft, and the swing link.

15. The compressor according to claim 8 , wherein the imbalance weight portion has a weighted force profile that is a sine wave.

16. The compressor according to claim 8 , wherein a weighted force profile of the imbalance weight portion is opposite to the Oldham ring pre-unbalanced force profile.

17. A scroll compressor, comprising:
a motor shaft having a plate portion;
a fixed scroll that interfaces the shaft;
an orbiting scroll having a base portion, wherein the orbiting scroll interfaces the fixed scroll;
an Oldham ring that interfaces the orbiting scroll and has a pre-unbalanced force profile in the form of a sine wave;
wherein the plate portion of the motor shaft and the base portion of the orbiting scroll define boundaries of an imbalance weight area;
wherein the imbalance weight area has a mass moment profile in the form of a sine wave that is about 175° to about 185° opposite of the sine wave of the pre-unbalanced force profile;
wherein the imbalance weight area reduces an amplitude of the sine wave of the pre-unbalanced force profile by about 45% to about 55%.

18. The compressor according to claim 17 , wherein the mass moment profile is 180° opposite of the pre-unbalanced force profile.

19. The compressor according to claim 17 , wherein the imbalance weight area reduces the pre-unbalanced force profile by 50%.

20. The compressor according to claim 17 , wherein the imbalance weight area produces a post-unbalanced force profile in the Oldham ring that is a flat line.

Assignees

• Honeywell Int Inc

Inventors

• Tang Benjamin
• Mccabe Niall

Classifications

• F04C18/0223

  with symmetrical double wraps · CPC title

• F04C2230/60

  Assembly methods · CPC title

• F04C29/0071 Primary

  Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft · CPC title

• F04C2270/12

  Vibration · CPC title

• F04C29/0057

  for eccentric movement · CPC title