ARRANGEMENT WITH A VENTILATOR AND A PUMP

• US 20090074594A1
• Filed: 09/06/2005
• Published: 03/19/2009
• Est. Priority Date: 11/19/2004
• Status: Abandoned Application

• Current Assignee: Ebm-Papst St Georgen GmbH & Company KG (Ebm-Papst Mulfingen GmbH & Company KG)
• Original Assignee: Ebm-Papst St Georgen GmbH & Company KG (Ebm-Papst Mulfingen GmbH & Company KG)
• Inventors: Strasser, Gunther
• Application Number:
  US11/719,852
• Publication Number:
  US 20090074594A1
• Time in Patent Office: Days
• US Class Current: 417/352
• CPC Class Codes: F01P 5/02 Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
• CPC Class Codes: F01P 5/04 Pump-driving arrangements
• CPC Class Codes: F01P 5/12 Pump-driving arrangements
• CPC Class Codes: F04D 25/064 Details of the rotor
• CPC Class Codes: F04D 25/0646 Details of the stator
• CPC Class Codes: F04D 31/00 Pumping liquids and elastic fluids at the same time

Abstract

A compact arrangement features a fan (42′), a fluid pump (134), and an electric drive motor (106). The latter has a stator (22) having a stator winding (118) that is configured to generate a rotating field. The stator (22) has associated with it a permanent-magnet external rotor (106) for driving the fan (42′), and a permanent-magnet internal rotor (140) for driving the fluid pump (134). The stator winding (118) thus drives not only the rotor (106) of the drive motor and hence the fan (42′), but also the internal rotor (140) and hence the fluid pump (134). The arrangement is very well suited for combination with a fluid cooler (90).

Claims

1. An arrangement having a fan (42;

42′

, 42″

) and a fluid pump (27;

134), and having an electric drive motor (21;

106), which motor comprises

a stator (22) having a stator winding (23;

118) that is configured for generating a rotating field,

which stator (22) has associated with it a permanent-magnet external rotor (48;

106) for driving the fan (42;

42′

, 42″

) and a permanent-magnet internal rotor (26;

140) for driving the fluid pump (27;

134), said rotors both magnetically interacting with said rotating field generated by said stator, so that, in operation, said rotors are driven by said rotating field.

2. The arrangement according to claim 1, wherein

the internal rotor (26;

140) is separated from the stator (22) by a magnetically transparent part (24;

120) that hermetically separates the internal rotor (26;

140) from the external rotor (48;

106).

3. The arrangement according to claim 1, wherein

the stator winding is implemented as a coreless winding (23;

118).

4. The arrangement according to claim 1, wherein

the number of poles of the external rotor (48;

106) matches the number of poles of the internal rotor (26;

140).

5. The arrangement according to claim 1, wherein

at least one of the permanent-magnet rotors has associated with it a damping member (50;

105) that enables said rotor to run asynchronously.

6. The arrangement according to claim 5, wherein

the damping member is implemented as a short-circuit cage (50;

105).

7. The arrangement according to claim 6, wherein

the damping member (50;

105) is implemented as an eddy-current damper.

8. The arrangement according to claim 1, wherein

the fan comprises fan blades (42′

;

42″

) that, during operation, rotate in an air guidance housing (40;

112;

112′

).

9. The arrangement according to claim 8, wherein

an air guidance passage (139) is defined between the air guidance housing (40;

112;

112′

) and the fluid pump (27;

134).

10. The arrangement according to claim 9, wherein

the air guidance housing (40;

112;

112′

) is connected to the fluid pump (27;

134) by at least one mechanical connecting element (38;

137).

11. The arrangement according to claim 9, wherein

the mechanical connecting element (38;

137) extends transversely to the air guidance passage (139).

12. The arrangement according to claim 9, wherein the mechanical connecting element (38;

137), the air guidance housing (112;

112′

), and an element (136) of the fluid pump (134) are implemented as one integral plastic part (FIG. 10).

13. The arrangement according to claim 1, wherein the fluid pump is implemented as a centrifugal pump (134).

14. The arrangement according to claim 13, wherein

the centrifugal pump (134) comprises a pump wheel (138) that is implemented integrally with the permanent-magnet internal rotor (26;

140).

15. The arrangement according to claim 14, wherein

the internal rotor (26;

140) is separated from the stator (22) by a magnetically transparent partitioning can (24;

120) that is implemented as an element of a stationary part (136) of the centrifugal pump (134).

16. The arrangement according to claim 2, wherein the stator winding is implemented as a coreless winding.

17. The arrangement according to claim 16, wherein at least one of the permanent-magnet rotors has, associated with it, a damping member that enables said rotor to run asynchronously.

18. The arrangement according to claim 2, wherein at least one of the permanent-magnet rotors has, associated with it, a damping member that enables said rotor to run asynchronously.

19. The arrangement according to claim 3, wherein at least one of the permanent-magnet rotors has, associated with it, a damping member that enables said rotor to run asynchronously.

20. The arrangement according to claim 4, wherein at least one of the permanent-magnet rotors has, associated with it, a damping member that enables said rotor to run asynchronously.