Co-rotating compressor

Patent metadata

Field	Value
Publication number	US-12104594-B2
Application number	US-202117519953-A
Country	US
Kind code	B2
Filing date	Nov 5, 2021
Priority date	Nov 5, 2021
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A compressor includes a compression mechanism, a driveshaft, and a motor. The compression mechanism is configured to compress a fluid to a discharge pressure. The motor is configured to rotate the driveshaft. The driveshaft is engaged with the compression mechanism and is fixed to rotate with at least a portion of the compression mechanism. The driveshaft includes a longitudinal aperture configured to receive the fluid at a suction pressure, and includes a flange that receives at least a portion of the compression mechanism. The flange and the compression mechanism define a fluid passage therebetween. The fluid at suction pressure is received within the fluid passage from the longitudinal aperture in the driveshaft.

First claim

What is claimed is:

1. A compressor comprising:
a compression mechanism configured to compress a fluid from a suction pressure to a discharge pressure;
a driveshaft engaged with the compression mechanism and fixed to rotate with at least a portion of the compression mechanism;
a motor configured to rotate the driveshaft; and
a shell assembly defining a suction chamber, wherein the compression mechanism, the driveshaft, and the motor are disposed within the shell assembly, and wherein the fluid at the suction pressure in the suction chamber circulates through the motor and is configured to transfer heat away from the motor,
wherein the driveshaft includes a longitudinal aperture configured to receive the fluid at the suction pressure, and
the driveshaft includes a flange that receives at least a portion of the compression mechanism, the flange and the compression mechanism defining a fluid passage therebetween, the fluid at the suction pressure being received within the fluid passage from the longitudinal aperture in the driveshaft.

2. The compressor of claim 1 , wherein:
the shell assembly includes a shell body, an endcap, and a partition,
the shell body defines the suction chamber,
the endcap and the partition define a discharge-pressure chamber.

3. The compressor of claim 1 , further comprising:
a shaft engaged with the compression mechanism and fixed in a stationary position,
wherein the shaft includes a longitudinal discharge aperture, and
the longitudinal discharge aperture is in fluid communication with a discharge port of the compression mechanism.

4. The compressor of claim 3 , further comprising a bearing housing fixed to rotate with at least a portion of the compression mechanism,
wherein the shaft is supported within the bearing housing by a first bearing, and
the shaft is supported within the compression mechanism by a second bearing.

5. The compressor of claim 4 , further comprising:
a first seal engaged with the shaft and the bearing housing and configured to prevent flow of fluid from the compression mechanism or an interface between the discharge port and the longitudinal discharge aperture.

6. The compressor of claim 4 , wherein the motor is fixed radially outside of the bearing housing.

7. The compressor of claim 3 , wherein:
the shell assembly is configured to house the compression mechanism, the driveshaft, and the motor,
the shell assembly includes a shell body, an endcap, and a partition, and
the shaft is fixed to or integral with the endcap.

8. The compressor of claim 3 , wherein:
the shell assembly is configured to house the compression mechanism, the driveshaft, and the motor,
the shell assembly includes a shell body, an endcap, and a partition, and
the shaft is fixed to or integral with the partition.

9. The compressor of claim 1 , wherein the compression mechanism includes a first scroll and a second scroll, the first scroll being fixed for rotation with the flange, and the first scroll including an axial passage in fluid communication with the fluid passage between the compression mechanism and the flange.

10. The compressor of claim 1 , wherein the driveshaft is supported by a bearing on a proximal end and engaged with the compression mechanism on a distal end.

11. The compressor of claim 10 , further comprising:
a seal engaged with the driveshaft and the bearing and configured to prevent flow of fluid from a suction-pressure inlet or an interface between the suction-pressure inlet and the driveshaft.

12. The compressor of claim 1 , wherein the compression mechanism includes an impeller that cooperates with the flange to define the fluid passage.

13. The compressor of claim 12 , wherein the impeller is formed with an end plate of a scroll member of the compression mechanism as a single, monolithic part.

14. A compressor comprising:
a shell assembly having a shell body, a first end cap, a second end cap, and a partition, wherein the shell assembly defines a discharge-pressure chamber and an internal space at a discharge pressure;
a compression mechanism housed within the shell assembly and configured to compress a fluid to the discharge pressure;
a bearing housing assembly having a bearing housing and a bearing, the bearing housing fixed to rotate with at least a portion of the compression mechanism;
a driveshaft housed within the shell assembly, engaged with the compression mechanism, and fixed to rotate with at least a portion of the compression mechanism; and
a motor housed within the shell assembly and configured to rotate the driveshaft,
wherein the driveshaft includes a longitudinal aperture configured to receive the fluid at a suction pressure,
wherein the shell body, the first end cap, and the partition define the internal space,
wherein the compression mechanism, the bearing housing assembly and the motor are housed in the internal space,
wherein the partition includes an aperture through which the fluid at the discharge pressure flows from the discharge-pressure chamber to the internal space, and
wherein the partition is disposed between the second end cap and first and second scrolls of the compression mechanism.

15. A compressor comprising:
a shell assembly having a shell body, an end cap, and a partition;
a compression mechanism housed within the shell assembly and configured to compress a fluid to a discharge pressure;
a driveshaft housed within the shell assembly, engaged with the compression mechanism, and fixed to rotate with at least a portion of the compression mechanism;
a bearing supporting the driveshaft; and
a motor housed within the shell assembly and configured to rotate the driveshaft,
wherein the driveshaft includes a longitudinal aperture configured to receive the fluid at a suction pressure,
wherein the compression mechanism and the motor are housed in a suction-pressure chamber defined by the shell assembly,
wherein the shell body, the end cap, and the partition define the suction-pressure chamber,
wherein a suction gas inlet fitting is attached to the shell assembly and is configured to provide a first portion of the fluid at the suction pressure to the longitudinal aperture, and
wherein a second portion of the fluid at the suction pressure flows from the suction gas inlet fitting to the suction-pressure chamber through a flow path that extends through the bearing and radially outside of the longitudinal aperture.

Assignees

• Copeland Lp

Inventors

• Ignatiev Kirill M
• Stover Robert C
• Perevozchikov Michael M
• Antimonov Mikhail A

Classifications

• F04C29/12

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C2240/52

  for assemblies with supports on both sides · CPC title

• F04C2240/30

  Casings or housings · CPC title

• F04C2240/20

  Rotors · CPC title

• F04C2240/603

  with internal channels for fluid distribution, e.g. hollow shaft · CPC title