Method of optimizing supercharger performance

Patent metadata

Field	Value
Publication number	US-11009034-B2
Application number	US-201916429641-A
Country	US
Kind code	B2
Filing date	Jun 3, 2019
Priority date	Jan 15, 2014
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A method of designing a supercharger that yields a high isometric efficiency based on a fixed pressure ratio, a plurality of rotor leads and a plurality of rotor operating speeds is provided. An efficiency map is generated of rotor lead versus rotor operating speeds for the fixed pressure ratio. A rotor lead value is determined based on the fixed pressure ratio and rotor speed combination from the efficiency map that yields a high isometric efficiency. A supercharger is provided having the determined rotor lead and that is configured to operate with the fixed pressure ratio and the determined rotor operating speed.

First claim

What is claimed is:

1. A method of designing a supercharger that yields a high isometric efficiency based on a fixed pressure ratio, a plurality of rotor leads and a plurality of rotor operating speeds, the method comprising:
generating an efficiency map of rotor lead versus rotor operating speed for the fixed pressure ratio;
determining a rotor lead value based on the fixed pressure ratio and rotor speed combination from the efficiency map that yields the high isometric efficiency; and
providing the supercharger having the determined rotor lead and that is configured to operate with the fixed pressure ratio and the determined rotor operating speed.

2. The method of claim 1 wherein the rotor lead is between 250 mm and 350 mm based on the fixed pressure ratio of 1.4 and the fixed rotor speed of between 9,000 RPM and 12,500 RPM.

3. The method of claim 1 wherein the rotor lead is between 375 mm and 350 mm based on the fixed pressure ratio of 1.4 and the fixed rotor speed of between 6,000 RPM and 9,000 RPM.

4. The method of claim 1 wherein the rotor lead is between 300 mm and 450 mm based on the fixed pressure ratio of 1.6 and the fixed rotor speed of between 8,000 RPM and 12,000 RPM.

5. The method of claim 1 wherein the rotor lead is 275 mm and 325 mm based on the fixed pressure ratio of 1.8 and the fixed rotor speed of 13,000 RPM and 17,000 RPM.

6. The method of claim 1 wherein the rotor lead is between 375 mm and 425 mm based on the fixed pressure ratio of 1.8 and the fixed rotor speed of between 9,000 RPM and 12,000 RPM.

7. A method of designing a supercharger that yields a high isometric efficiency based on a fixed pressure ratio, a plurality of rotor leads and a plurality of rotor operating speeds, the method comprising:
generating an efficiency map of rotor lead versus rotor operating speed for the fixed pressure ratio;
determining a rotor operating speed value based on the fixed pressure ratio and rotor lead combination from the efficiency map that yields the high isometric efficiency; and
providing the supercharger having the determined rotor lead and that is configured to operate with the fixed pressure ratio and the determined rotor operating speed.

8. The method of claim 7 wherein the rotor lead is between 250 mm and 350 mm based on the fixed pressure ratio of 1.4 and the fixed rotor speed of between 9,000 RPM and 12,500 RPM.

9. A method of designing a supercharger that yields a high isometric efficiency based on a fixed pressure ratio, a plurality of rotor leads and a plurality of rotor operating speeds, the method comprising:
operating a first supercharger with a first rotor lead at the fixed pressure ratio;
identifying a first rotor speed that provides a highest thermal efficiency for the first supercharger;
operating a second supercharger with a second rotor lead at the fixed pressure ratio;
identifying a second rotor speed that provides a highest thermal efficiency for the second supercharger;
establishing an efficiency map that identifies a series of rotor lead and rotor speed combinations that achieve highest thermal efficiencies for a plurality of superchargers operating at the fixed pressure ratio;
determining a rotor lead that achieves peak efficiency for a proposed supercharger application requiring the fixed pressure ratio and a fixed rotor speed based on the efficiency map; and
providing the supercharger having the fixed pressure ratio and the determined rotor lead and that is configured to operate at the fixed rotor speed.

10. The method of claim 9 wherein the rotor lead is between 250 mm and 350 mm based on the fixed pressure ratio of 1.4 and the fixed rotor speed of between 9,000 RPM and 12,500 RPM.

11. The method of claim 9 wherein the rotor lead is between 375 mm and 350 mm based on the fixed pressure ratio of 1.4 and the fixed rotor speed of between 6,000 RPM and 9,000 RPM.

12. The method of claim 9 wherein the rotor lead is between 300 mm and 450 mm based on the fixed pressure ratio of 1.6 and the fixed rotor speed of between 8,000 RPM and 12,000 RPM.

13. The method of claim 9 wherein the rotor lead is 275 mm and 325 mm based on the fixed pressure ratio of 1.8 and the fixed rotor speed of 13,000 RPM and 17,000 RPM.

14. The method of claim 9 wherein the rotor lead is between 375 mm and 425 mm based on the fixed pressure ratio of 1.8 and the fixed rotor speed of between 9,000 RPM and 12,000 RPM.

15. A method of designing a supercharger that yields a high isometric efficiency based on a fixed pressure ratio, a plurality of rotor leads and a plurality of rotor operating speeds, the method comprising:
operating a first supercharger with a first rotor lead at the fixed pressure ratio;
identifying a first rotor speed that provides a highest thermal efficiency for the first supercharger;
operating a second supercharger with a second rotor lead at the fixed pressure ratio;
identifying a second rotor speed that provides a highest thermal efficiency for the second supercharger;
establishing an efficiency map that identifies a series of rotor lead and rotor speed combinations that achieve highest thermal efficiencies for a plurality of superchargers operating at the fixed pressure ratio;
determining an operational speed that achieves peak efficiency for a proposed supercharger application requiring the fixed pressure ratio and a fixed rotor lead based on the efficiency map; and
providing the supercharger having the fixed pressure ratio, the fixed rotor lead and that is configured to operate at the determined operational speed.

16. The method of claim 15 wherein the rotor lead is between 250 mm and 350 mm based on the fixed pressure ratio of 1.4 and the fixed rotor speed of between 9,000 RPM and 12,500 RPM.

17. The method of claim 15 wherein the rotor lead is between 375 mm and 350 mm based on the fixed pressure ratio of 1.4 and the fixed rotor speed of between 6,000 RPM and 9,000 RPM.

18. The method of claim 15 wherein the rotor lead is between 300 mm and 450 mm based on the fixed pressure ratio of 1.6 and the fixed rotor speed of between 8,000 RPM and 12,000 RPM.

19. The method of claim 15 wherein the rotor lead is 275 mm and 325 mm based on the fixed pressure ratio of 1.8 and the fixed rotor speed of 13,000 RPM and 17,000 RPM.

20. The method of claim 15 wherein the rotor lead is between 375 mm and 425 mm based on the fixed pressure ratio of 1.8 and the fixed rotor speed of between 9,000 RPM and 12,000 RPM.

Assignees

• Eaton Intelligent Power Ltd

Inventors

• Swartzlander Matthew

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F04C2/00

  Rotary-piston machines or pumps (with non-parallel axes of co-operating members F04C3/00; with the working-chamber walls at least partly resiliently deformable F04C5/00; with fluid ring or the like F04C7/00; rotary-piston pumps specially adapted for elastic fluids F04C18/00; rotary-piston machines or pumps in which the working-fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F04B) · CPC title

• F04D27/001 Primary

  Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring · CPC title

• F04C18/16 Primary

  with helical teeth, e.g. chevron-shaped, screw type {(for non-parallel axes of movement F04C18/48)} · CPC title

• F04C18/126

  with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type · CPC title