Claims
- 1. A pump arrangement comprising:
a housing; a first pumping chamber within said housing, said first pumping chamber connectable to a first liquid transport circuit; a drive shaft carried by said housing; a first pumping means arranged for rotation within said first pumping chamber, said first pumping means being driven by said drive shaft; a second pumping chamber separated from said first pumping chamber by said housing such that said housing forms a common separation wall, said second pumping chamber connectable to a second liquid transport circuit, said second pumping chamber accommodating second pumping means being driven by said drive shaft; wherein said second pumping means is driven by said drive shaft via a magnetic coupling, said coupling comprising a driver rotor connected to said drive shaft and a driven rotor carried by said housing, said driven rotor driving said second pumping means, said driver rotor and said driven rotor being separated by a separation wall assembly serving as a static seal to hermetically seal the second pumping chamber from said drive shaft.
- 2. The pump arrangement as claimed in claim 1, wherein said driver rotor supports a number of first magnets arranged circumferentially on said driver rotor, and in that said driven rotor supports a number of second magnets arranged circumferentially on said driven rotor.
- 3. The pump arrangement as claimed in claim 2, wherein said number of first magnets on said driver rotor are held in a first magnet holder assembly, in that said number of second magnets on said driven rotor are held in a second magnet holder assembly, and in that said first and second magnet holder assemblies are substantially radially aligned.
- 4. The pump arrangement as claimed in claim 3, wherein said first magnet holder assembly is arranged on a radially inwardly facing surface of said driver rotor, and said second magnet holder assembly is arranged on a radially outwardly facing surface of said driven rotor.
- 5. The pump arrangement as claimed in claim 1, wherein said separation wall assembly has an annular portion arranged substantially parallel to said drive shaft, said annular portion passing through a gap between said first and second magnet holder assemblies, in that at a first axial end of said annular portion, said separation wall assembly has a radially outwardly extending flange partially delimiting said second pumping chamber, and in that at a second axial end of said annular portion, said assembly has a radially inwardly extending flange, comprising sealing means for sealing against said housing.
- 6. The pump arrangement as claimed in claim 5, wherein said separation wall assembly is made from steel.
- 7. The pump arrangement as claimed in claim 3, wherein said housing and said first and second magnet holder assemblies are made from aluminum.
- 8. A fuel delivery system comprising the pump arrangement as claimed in claim 1.
- 9. The fuel delivery system as claimed in claim 8, said system further comprising a fuel reservoir connected to a suction side of said pump arrangement, a fuel delivery line connected to an output side of said pump arrangement, a fuel filter in said delivery line, a number of fuel injectors connected to said delivery line downstream of said fuel filter, and a return line from said number of injectors to said suction side of said pump arrangement.
- 10. The fuel delivery system of claim 9, wherein said magnetic coupling in said pump arrangement restricts the amount of torque transmitted to the driven rotor such that a maximum pressure of about 9 bar is attained at said output side of said pump.
- 11. A liquid cooling system comprising the pump arrangement as claimed in claim 1.
- 12. A vehicle comprising the fuel delivery system as claimed in claim 8.
- 13. A vehicle comprising the liquid cooling system as claimed in claim 11.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9803895-3 |
Nov 1998 |
SE |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation patent application of International Application Number PCT/SE99/02039 filed Nov. 10, 1999 and which designates the United States; the disclosure of that application is expressly incorporated by reference in its entirety.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/SE99/02039 |
Nov 1999 |
US |
Child |
09681627 |
May 2001 |
US |