Fluid machine with helically lobed rotors

Patent metadata

Field	Value
Publication number	US-11268512-B2
Application number	US-201816473185-A
Country	US
Kind code	B2
Filing date	Jan 11, 2018
Priority date	Jan 11, 2017
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A fluid machine includes a first rotor having a first rotor first working portion and a first rotor second working portion, a second rotor having a second rotor first working portion configured to mesh with the first rotor first working portion and a second rotor second working portion configured to mesh with the first rotor second working portion and rotate independently from the second rotor first working portion.

First claim

What is claimed is:

1. A fluid machine comprising:
a first rotor having a first rotor first working portion and a first rotor second working portion; and
a second rotor having
a second rotor first working portion configured to mesh with the first rotor first working portion and
a second rotor second working portion configured to mesh with the first rotor second working portion and rotate independently from the second rotor first working portion;
a first shaft fixed for rotation with the first rotor;
a second shaft having a shaft diameter and configured to rotationally support the second rotor;
wherein the second rotor includes an axially-extending bore having a bore diameter greater than the shaft diameter;
wherein the second rotor first working portion axially abuts the second rotor first second working portion.

2. The fluid machine of claim 1 , further comprising a casing rotatably supporting the first shaft and at least partially enclosing the first rotor and the second rotor.

3. The fluid machine of claim 1 , further comprising an axially-extending passage defined between the shaft diameter and the bore diameter, the axially-extending passage circulating lubricant therethrough.

4. The fluid machine of claim 1 , wherein at least one of the first shaft and the second shaft includes an axial shaft passage having an axial shaft passage diameter.

5. The fluid machine of claim 4 , wherein the at least one of the first shaft and the second shaft includes a shaft diameter, and the axial shaft passage diameter is less than 80% of the shaft diameter.

6. The fluid machine of claim 1 , wherein at least one of the first shaft and the second shaft includes a radially-extending shaft passage having a radially-extending shaft passage diameter.

7. The fluid machine of claim 6 , wherein the at least one of the first shaft and the second shaft includes a shaft diameter, and the radially-extending shaft passage diameter is less than 40% of the shaft diameter.

8. The fluid machine of claim 1 , wherein the first rotor first working portion, the first rotor second working portion, the second rotor first working portion, and the second rotor second working portion include helical lobes.

9. The fluid machine of claim 1 , wherein the second shaft is fixed for rotation with the casing.

10. The fluid machine of claim 1 , wherein the first rotor includes first helical lobes and second helical lobes, and the second rotor includes a first portion configured to mesh with the first helical lobes and a second portion configured to mesh with the second helical lobes and rotate independently from the first portion.

11. The fluid machine of claim 1 , wherein both the first shaft and the second shaft include a radially-extending shaft passage having a radially-extending shaft passage diameter.

Assignees

• Carrier Corp

Inventors

• Pandzik Richard T
• Akei Masao

Classifications

• F04C29/023

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

• F04C2240/20

  Rotors · CPC title

• F04C18/165 Primary

  having more than two rotary pistons with parallel axes · CPC title

• F01C21/02

  Arrangements of bearings (bearing constructions F16C) · CPC title

• F04C2240/605

  Shaft sleeves or details thereof · CPC title