Pump

• US 7,048,518 B2
• Filed: 11/27/2002
• Issued: 05/23/2006
• Est. Priority Date: 07/16/2001
• Status: Expired due to Term

• Current Assignee: Eberle Equipamentos E Processos SA
• Original Assignee: Eberle Equipamentos E Processos SA
• Inventors: Becker, Fernando Augusto, Oliveira, Ricardo Augusto De Facci
• Primary Examiner(s): LIU, HAN L
• Application Number:
  US10/305,385
• Publication Number:
  US 20030124002A1
• Time in Patent Office: 1,273 Days
• Field of Search: 417/357, 417/372, 417/373, 417/366, 417/4, 417/313, 417/423.11, 417/423.14, 417/351, 417/356, 417/423.9, 415/203
• US Class Current: 417/357
• CPC Class Codes: F04D 13/0646 the hollow pump or motor shaft being the conduit for the working fluid

Abstract

The present invention comprises a pump (10, 110) having a casing (14, 114) with at least one first hermetically sealed chamber (19, 119) and at least one second chamber (17, 117) adjacent to said first chamber, defining a passageway (18, 118) for fluids and having an inlet (15, 115) and an outlet (16, 116) for the fluids. The stator (12, 112) is provided in this first chamber (19, 119). In addition, a rotor-turbine assembly (11, 111) is induced by the stator (12, 112) to drive a fluid from the inlet (15, 115) to the outlet (16, 116), the rotor and the turbine being integral and wholly located in the second chamber (17, 117). In a preferred embodiment, a fluid course between the opening of outlet (115) and fluid passage (118), in portion (119a) of first chamber (119), is provided with filtration zone (120) suitable for filtration of a fluid to be impelled by the pump.

Claims

1. A pump comprising:

a casing having at least one first hermetically sealed chamber, and at least one second chamber adjacent to said first chamber, defining a passageway for fluids and having an inlet and an outlet for the fluids, the first and second chambers being separated from each other by walls;

a stator located in said first chamber;

a rotor-turbine assembly with rotor and turbine, and being capable of being induced by the stator to drive a fluid from the inlet to the outlet, at least a portion of said assembly being positioned concentrically with respect to the stator, wherein the rotor and the turbine are integral and are wholly located in the second chamber, so that, when in operation, a film of fluid will be maintained around said assembly to provide a support therefor, and wherein said rotor-turbine assembly is bored through, defining an internal fluid passageway;

wherein said integral rotor-turbine assembly is supported in said pump bearing free.

2. The pump according to claim 1, wherein said walls of the first and second chambers are made of injectable polymer.

3. The pump according to claim 1, wherein said rotor-turbine assembly is of a polymeric material, having a metallic component inside, which is capable of being induced by the stator.

4. The pump according to claim 3, wherein said metallic component is composed of iron and aluminum.

5. The pump according to claim 1, wherein said stator is located in a position adjacent to the walls that separate said first chamber from the said second, so that the circulating fluid can cool said stator by heat transmission.

6. The pump according to claim 1, wherein the turbine of said assembly is composed of blades for centrifuging the fluids.

7. The pump according to claim 1, wherein the space between said assembly and the stator is substantially filled up by walls of the first and the second chambers.

8. The pump in accordance with claim 1, further comprising a filter assembly positioned, relative to fluid flow, downstream of an opening of the inlet and upstream of a fluid passageway section defining the film of fluid maintained around said rotor-turbine assembly.

9. The pump in accordance with claim 8, in which the filtration assembly comprises a replaceable filter element and cover.

10. The pump in accordance with claim 8, in which the second chamber is arranged such that the opening of the inlet is coaxial with a hollow interior in the rotor-turbine assembly and establishes a course for the fluid, extending initially downward and then extending to an upper portion of said second chamber, where it reaches said filter assembly, the course of the fluid proceeding beyond said filter assembly, being via an intermediate chamber, and then on to a passage that constitutes the hollow interior of the rotor-turbine assembly.

11. The pump as recited in claim 1, said fluid passageway also includes an outlet stator cooling passageway section which extends into cooling contact with the second wall portion of said first chamber and is separated from the inlet stator cooling passageway section by a separation wall of said casing.

12. A pump, comprising:

a casing having a first chamber and a second chamber;

a stator received in said first chamber;

a rotor assembly received by said second chamber and positioned relative to said stator so as to be induced into rotation by the stator to drive fluid received by said pump, and said second chamber defining a fluid passageway for passage of the fluid received by said pump from an inlet of said pump to an outlet of said pump, and said fluid passageway including a fluid film bearing support fluid passageway section which positions fluid between said rotor assembly and a wall region defining said second chamber, and said first chamber sealing off said stator from fluid contact with fluid traveling in said fluid passageway, and wherein said rotor assembly includes a turbine assembly with turbine shaft and a turbine blade, and said turbine assembly being in common rotation engagement with said rotor, and said fluid passageway includes a through passageway section provided in said turbine shaft;

wherein said rotor assembly is supported in said pump bearing free.

13. The pump as recited in claim 12 wherein said fluid passageway includes a recycling fluid passageway portion which directs fluid having passed through said turbine shaft and said fluid film bearing support fluid passageway section back into fluid communication with fluid traveling in said through passageway section.

14. The pump as recited in claim 12 wherein said wall region of said second chamber is formed of a polymeric material and is positioned adjacent to said stator.

15. The pump as recited in claim 14 wherein said rotor assembly includes a polymeric wall section that is positioned between said rotor and said fluid film bearing support fluid passageway section.

16. A pump, comprising:

a casing having a first chamber and a second chamber;

a stator received in said first chamber;

a rotor assembly received by said second chamber and positioned relative to said stator so as to be induced into rotation by the stator to drive fluid received by said pump, and said second chamber defining a fluid passageway for passage of the fluid received by said pump from an inlet of said pump to an outlet of said pump, and said fluid passageway including a fluid film bearing support fluid passageway section which positions fluid between said rotor assembly and a wall region defining said second chamber, and said first chamber sealing off said stator from fluid contact with fluid traveling in said fluid passageway, and wherein said wall region of said second chamber also defines a first wall portion of said first chamber and said first chamber also includes a second wall portion positioned to an opposite side of said stator than said first wall portion, and said fluid passageway includes an inlet stator cooling passageway section and an outlet stator cooling passageway section which extend into cooling contact with the second wall portion of said first chamber and are separated by a separation wall of said casing.

17. A pump, comprising:

a casing having a first chamber and a second chamber;

a stator received in said first chamber;

a rotor assembly received by said second chamber and positioned relative to said stator so as to be induced into rotation by the stator to drive fluid received by said pump, and said second chamber defining a fluid passageway for passage of the fluid received by said pump from an inlet of said pump to an outlet of said pump, and said fluid passageway including a fluid film bearing support fluid passageway section which positions fluid between said rotor assembly and a wall region defining said second chamber, and said first chamber sealing off said stator from fluid contact with fluid traveling in said fluid passageway, and wherein said rotor assembly includes an annular rotor with a central passage through which a through passageway section of said fluid passageway axially extends, and said pump further comprising a filter assembly positioned in the fluid passageway downstream of the pump inlet and upstream of the through passageway section relative to fluid flow through said pump.

18. A pump, comprising:

a casing having a first chamber and a second chamber;

a stator received in said first chamber;

an integral rotor-turbine assembly received by said second chamber and positioned concentrically relative to said stator so as to be induced into rotation by the stator to drive fluid received by said pump, and said second chamber defining a fluid passageway for passage of the fluid received by said pump from an inlet to an outlet of said pump;

said integral rotor-turbine assembly having a through bore defining an internal passageway where the fluid received by said pump enters to be propelled to the outlet of said pump;

said fluid passageway defined by the second chamber including a fluid film bearing support section between said integral rotor-turbine assembly and a wall region defining said second chamber, thereby allowing a re-circulation of a portion of the fluid leaving the rotor-turbine assembly through said fluid film bearing support section to said internal passageway;

said wall region of said second chamber also defining a first wall portion of said first chamber and said first chamber also including a second wall portion positioned to an opposite side of said stator than said first wall portion, and said fluid passageway includes an outlet stator cooling passageway section which extends into cooling contact with the second wall portion of said first chamber, thereby cooling said stator.

19. The pump as recited in claim 18 wherein said integral rotor-turbine assembly includes a turbine blade.

20. The pump as recited in claim 18 wherein said wall region is formed of a polymeric material.

21. The pump as recited in claim 20 wherein said integral rotor-turbine assembly includes a polymeric wall section that is positioned between said assembly and said fluid film bearing support fluid passageway section.

22. The pump as recited in claim 21, wherein said integral rotor-turbine assembly has a metallic component inside, which is capable of being induced by the stator.

23. The pump as recited in claim 22, wherein said metallic component is composed of iron and aluminum.

24. The pump as recited in claim 18 further comprising a filter assembly positioned in the fluid passageway downstream of the pump inlet and upstream of the internal passageway.

25. The pump as recited in claim 18, said fluid passageway also includes an inlet stator cooling passageway section which extend into cooling contact with the second wall portion of said first chamber and is separated from the outlet stator cooling passageway section by a separation wall of said casing.

26. The pump as recited in claim 18, wherein said integral rotor-turbine assembly is bearing free.

27. A pump, comprising:

a casing having a first chamber and a second chamber;

a stator received in said first chamber;

an integral rotor-turbine assembly received by said second chamber and positioned concentrically relative to said stator so as to be induced into rotation by the stator to drive fluid received by said pump, and said second chamber defining a fluid passageway for passage of the fluid received by said pump from an inlet to an outlet of said pump;

said integral rotor-turbine assembly being bored through, defining an internal passageway where the fluid received by the pump enters to be propelled to said outlet of the pump;

said fluid passageway defined by the second chamber including a fluid film bearing support section between said integral rotor-turbine assembly and a wall region defining said second chamber, thereby allowing a re-circulation of a portion of the fluid leaving the rotor-turbine assembly through said fluid film bearing support section to said internal passageway;

said wall region of said second chamber also defines a first wall portion of said first chamber and said first chamber also includes a second wall portion positioned to an opposite side of said stator than said first wall portion, and said fluid passageway includes an inlet stator cooling passageway section which extends into cooling contact with the second wall portion of said first chamber, thereby cooling said stator.

28. A pump comprising:

a casing having at least one first hermetically sealed chamber, and at least one second chamber adjacent to said first chamber, defining a passageway for fluids and having an inlet and an outlet for the fluids, the first and second chambers being separated from each other by walls;

a stator located in said first chamber;

a rotor-turbine assembly with rotor and turbine, and being capable of being induced by the stator to drive a fluid from the inlet to the outlet, at least a portion of said assembly being positioned concentrically with respect to the stator, wherein the rotor and the turbine are integral and are wholly located in the second chamber, so that, when in operation, a film of fluid will be maintained around said assembly to provide a support therefor, and wherein said rotor-turbine assembly is bored through, defining an internal fluid passageway;

said fluid passageway also includes an outlet stator cooling passageway section which extends into cooling contact with the second wall portion of said first chamber and is separated from the inlet stator cooling passageway section by a separation wall of said casing.

29. A pump comprising:

a casing having at least one first hermetically sealed chamber, and at least one second chamber adjacent to said first chamber, defining a passageway for fluids and having an inlet and an outlet for the fluids, the first and second chambers being separated from each other by walls;

a stator located in said first chamber,

a rotor-turbine assembly with rotor and turbine, and being capable of being induced by the stator to drive a fluid from the inlet to the outlet, at least a portion of said assembly being positioned concentrically with respect to the stator, wherein the rotor and the turbine are integral and are wholly located in the second chamber, so that, when in operation, a film of fluid will be maintained around said assembly to provide a support therefor, and wherein said rotor-turbine assembly is bored through, defining an internal fluid passageway;

a filter assembly positioned, relative to fluid flow, downstream of an opening of the inlet and upstream of a fluid passageway section defining the film of fluid maintained around said rotor-turbine assembly.

30. The pump in accordance with claim 29, in which the filtration assembly comprises a replaceable filter element and cover.

31. The pump in accordance with claim 29, in which the second chamber is arranged such that the opening of the inlet is coaxial with a hollow interior in the rotor-turbine assembly and establishes a course for the fluid, extending initially downward and then extending to an upper portion of said second chamber, where it reaches said filter assembly, the course of the fluid proceeding beyond said filter assembly, being via an intermediate chamber, and then on to a passage that constitutes the hollow interior of the rotor-turbine assembly.

32. A pump, comprising:

a casing having a first chamber and a second chamber;

a stator received in said first chamber;

a rotor assembly received by said second chamber and positioned relative to said stator so as to be induced into rotation by the stator to drive fluid received by said pump, and said second chamber defining a fluid passageway for passage of the fluid received by said pump from an inlet of said pump to an outlet of said pump, and said fluid passageway including a fluid film bearing support fluid passageway section which positions fluid between said rotor assembly and a wail region defining said second chamber, and said first chamber sealing off said stator from fluid contact with fluid traveling in said fluid passageway, and wherein said rotor assembly includes a turbine assembly with turbine shaft and a turbine blade, and said turbine assembly being in common rotation engagement with said rotor, and said fluid passageway includes a through passageway section provided in said turbine shaft;

wherein said fluid passageway includes a recycling fluid passageway portion which directs fluid having passed through said turbine shaft and said fluid film bearing support fluid passageway section back into fluid communication with fluid traveling in said through passageway section.