Co-rotating scroll compressor and assembly method therefor

Patent metadata

Field	Value
Publication number	US-11199189-B2
Application number	US-201816966675-A
Country	US
Kind code	B2
Filing date	Nov 2, 2018
Priority date	Feb 5, 2018
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

Provided is a co-rotating scroll compressor comprising a synchronous drive mechanism that can achieve a long life. The compressor comprises a driving side scroll member ( 90 ) driven to rotate about a driving side rotation axis CL 1 , a driven side scroll member ( 70 ) driven to rotate about a driven side rotation axis CL 2 , a hollowed drive shaft ( 6 ) that is connected to the driving side scroll member ( 90 ), and driven by a motor ( 5 ) to rotate, and a driven shaft ( 20 ) that is disposed inside the drive shaft ( 6 ), and has one end connected to the drive shaft ( 6 ) via a first flexible coupling ( 21 ) and the other end connected to the driven side scroll member ( 70 ) via a second flexible coupling ( 22 ).

First claim

The invention claimed is:

1. A co-rotating scroll compressor comprising:
a driving side scroll member that is driven by a drive unit to rotate about a driving side rotation axis, and includes a spiral driving side wall body disposed on a driving side end plate,
a driven side scroll member that is driven to rotate about a driven side rotation axis parallel to the driving side rotation axis, performs rotation movement at the same angular velocity in the same direction as in the driving side scroll member, and includes a spiral driven side wall body corresponding to the driving side wall body and disposed on a driven side end plate, the driven side wall body being caused to mesh with the driving side wall body to form a compression space,
a hollowed drive shaft that is connected to the driving side scroll member, and driven by the drive unit to rotate, and
a driven shaft that is disposed inside the drive shaft, and has one end connected to the drive shaft via a first flexible coupling and the other end connected to the driven side scroll member via a second flexible coupling.

2. The co-rotating scroll compressor according to claim 1 , wherein the first flexible coupling is disposed on an opposite side of the drive shaft as seen from the driving side scroll member, and
the second flexible coupling is disposed on a driving side scroll member side of the drive shaft.

3. The co-rotating scroll compressor according to claim 1 , wherein positioning holes in which a common positioning pin is to be inserted are formed in the driving side scroll member and the driven side scroll member.

4. The co-rotating scroll compressor according to claim 3 , further comprising:
a housing that houses the driving side scroll member and the driven side scroll member, wherein an insertion hole in which the common positioning pin is to be inserted is formed in the housing.

5. The co-rotating scroll compressor according to claim 4 , further comprising:
a sealing member with which the insertion hole is sealed.

6. An assembly method for a co-rotating scroll compressor comprising:
a driving side scroll member that is driven by a drive unit to rotate about a driving side rotation axis, and includes a spiral driving side wall body disposed on a driving side end plate,
a driven side scroll member that is driven to rotate about a driven side rotation axis parallel to the driving side rotation axis, performs rotation movement at the same angular velocity in the same direction as in the driving side scroll member, and includes a spiral driven side wall body corresponding to the driving side wall body and disposed on a driven side end plate, the driven side wall body being caused to mesh with the driving side wall body to form a compression space,
a hollowed drive shaft that is connected to the driving side scroll member, and driven by the drive unit to rotate, and
a driven shaft that is disposed inside the drive shaft, and has one end fixed to the drive shaft via a first flexible coupling and the other end connected to the driven side scroll member via a second flexible coupling, wherein positioning holes in which a common positioning pin is to be inserted are formed in the driving side scroll member and the driven side scroll member, the assembly method for the co-rotating scroll compressor, comprising:
a step of inserting the common positioning pin in the positioning holes to position the driving side scroll member and the driven side scroll member, and then removing the common positioning pin.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Yamashita Takuma
• Ito Takahide
• Kitaguchi Keita
• Takeuchi Makoto
• Hirata Hirohumi

Classifications

• F04C29/023

  Lubricant distribution through a hollow driving shaft (F04C29/025 takes precedence) · CPC title

• F01C17/06

  using cranks, universal joints or similar elements (F01C1/07 takes precedence) · CPC title

• F04C29/0078

  Fixing rotors on shafts, e.g. by clamping together hub and shaft · CPC title

• F04C18/0238 Primary

  with symmetrical double wraps · CPC title

• F04C2240/605

  Shaft sleeves or details thereof · CPC title