Assembly structure for a turbo compressor

• US 6,471,493 B2
• Filed: 01/23/2001
• Issued: 10/29/2002
• Est. Priority Date: 09/27/2000
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Suh, Kwang Ha, Lee, Sang Wook, Choi, Moon Chang, Ji, Yoo Choi
• Primary Examiner(s): Tyler, Cheryl J.
• Assistant Examiner(s): Solak, Timothy P.
• Application Number:
  US09/766,578
• Publication Number:
  US 20020037225A1
• Time in Patent Office: 644 Days
• Field of Search: 384/192, 384/194, 384/196, 384/199, 384/202, 417/244, 417/247, 417/350, 417/357, 417/360, 417/423.15, 417/423.12, 417/423.14
• US Class Current: 417/350
• CPC Class Codes: F04D 25/0606 the electric motor being specially adapted for integration in the pump
• CPC Class Codes: F04D 25/16 Combinations of two or more pumps ; Producing two or more separate gas flows
• CPC Class Codes: F04D 29/057 hydrostatic; hydrodynamic

Abstract

The present invention relates to a turbo compressor which is capable of minimizing deformation of construction parts which may occur in welding or after welding and simplifying the manufacture and assembly by forming the outer diameter of a driving shaft so as to be stepped and joining the construction parts with bolts and pins. The turbo compressor in accordance with the present invention comprises a sealed container having separate inlets on each end, a first bearing housing and a second bearing housing and a driving motor installed inside of the sealed container, a driving shaft with its both ends separately inserted-penetrates through holes in the first and second bearing housings, a sealing member fixedly joined to the first bearing housing, a radial supporting member for supporting the driving shaft in the radial direction, first and second impellers and first and second diffuser members fixedly connected to the both ends of the driving shaft, an interconnection pipe for connecting the inlets, and an axial supporting member for supporting the driving shaft in the axial direction.

Claims

1. An assembly structure for a turbo compressor having a motor chamber, a first compressing chamber, and a second compressing chamber, said assembly structure comprising:

a sealed container including;

a cylinder body;

a first cover plate combined with the cylinder body at one end of the cylinder body, the first cover plate having an inlet therein;

an interconnection pipe for connecting the first compressing chamber with the second compressing chamber; and

a first fixing member fixed to an inner surface of the cylinder body;

a first bearing housing having a through hole therein, and being assembled with the first fixing member by a first connecting member, thereby defining the first compressing chamber between the first cover plate and the first bearing housing;

a driving motor installed in the motor chamber; and

having a driving shaft passing through the through hole in the first bearing housing;

a first impeller connected with one end of the driving shaft in the first compressing chamber;

a sealing member positioned between the first impeller and the first bearing housing, and assembled with the first bearing housing by a second connecting member, for preventing pressure leakage from the first compressing chamber; and

a first diffuser member assembled with the sealing member on an outer circumference of the first impeller by a third connecting member.

2. The assembly structure of claim 1, wherein said first connecting member is a bolt.

3. The assembly structure of claim 1, wherein said second connecting member is a pin.

4. The assembly structure of claim 1, wherein said third connecting member is a pin.

5. The assembly structure of claim 1, wherein said sealing member includes a labyrinth sealing part on an inner circumference thereof.

6. The assembly structure of claim 1, further comprising a bearing bush for receiving the driving shaft therethrough, said bearing bush being inserted into the through hole in the first bearing housing.

7. The assembly structure of claim 1, further comprising a radial bearing member having a plurality of foils positioned between the bearing bush and the first bearing housing.

8. The assembly structure of claim 1, further comprising an axial bearing member having a plurality of foils positioned between the sealing member and the second bearing housing.

9. The assembly structure of claim 1, wherein said sealing member includes a labyrinth sealing part on an inner circumference thereof.

10. The assembly structure of claim 1, further comprising:

a second cover plate connected with the cylinder body at the other end of the cylinder body, the second cover plate having an inlet therein connected with the interconnecting pipe;

a second fixing member fixed to an inner surface of the cylinder body;

a second bearing housing respectively having a through hole therein passed through by the driving shaft, and being assembled with the second fixing member by a fourth connecting member, thereby defining the second compressing chamber between the second cover plate and the second bearing housing, and defining the motor chamber between the first bearing housing and the second bearing housing;

a second impeller connected with the other end of the driving shaft in the second compressing chamber; and

a second diffuser member assembled with the second bearing housing on an outer circumference of the second impeller by a fifth connecting member.

11. The assembly structure of claim 10, wherein said fourth connecting member is a bolt.

12. The assembly structure of claim 10, wherein said fifth connecting member is a pin.

13. The assembly structure of claim 10, further comprising a radial bearing member having a plurality of foils positioned between the driving shaft and the second bearing housing.

14. The assembly structure of claim 10, wherein the motor chamber is connected with an outlet formed in a side of the cylinder body, said second bearing housing being formed with a plurality of first through holes therein, and a plurality of second through holes are formed in the driving motor, for enabling refrigerant gas to flow from the second compressing chamber flow into the motor chamber and be discharged from the motor chamber through the outlet.

15. The assembly structure of claim 10, wherein an outer diameter of the driving shaft decreases from the second bearing housing to the first bearing housing.