Pump embodied as a side channel pump

• US 20030185667A1
• Filed: 03/28/2003
• Published: 10/02/2003
• Est. Priority Date: 09/30/2000
• Status: Active Grant

• Current Assignee: Leybold Vakuum GmbH
• Original Assignee: Leybold Vakuum GmbH
• Inventors: Klingner, Peter, Englander, Heinrich, Seckel, Ingo
• Granted Patent: US 7,090,460 B2
• Time in Patent Office: Days
• US Class Current: 415/55.1
• CPC Class Codes: F04D 17/168 Pumps specially adapted to produce a vacuum
• CPC Class Codes: F04D 19/044 Holweck-type pumps
• CPC Class Codes: F04D 23/008 Regenerative pumps for liquids or for liquids and elastic fluids F04D5/002

Abstract

The invention relates to a pump which is being a side channel pump, preferably a vacuum pump, essentially comprising a driven rotor (16) and a fixed stator (14). The rotor (16) and the stator (14) define a pump channel circulating in a peripheral direction. Blades are fixed onto the rotor, protruding into the cross-section of the pump channel. The pump channel also comprises a blade-free side channel (44). The pump channel (22) containing the side channel (44) extends in a helical manner around the rotor (16). The pump channel is, therefore, no longer limited to the length of a winding but can have the length of a plurality of random uninterrupted windings. As a result, a high suction performance and a high compression ratio in the pump can be obtained.

Claims

1. A pump being a side channel pump, comprising

a driven rotor (16) and a stator (14),

a circumferential pump channel (22) configured in the rotor (16) and defined by the stator (14),

blades (38) fixed to the rotor (16) and protruding into the pump channel cross-section, and

a blade-free side channel (44) in the pump channel (22), characterized in

that the pump channel (22) including the side channel (44) extends helically about the rotor (16).

2. The pump of claim 1, characterized in that a helically extending channel wall (20) laterally defining the pump channel (22) protrudes from the rotor (16), and that the stator (14) has a smooth surface in the region of the pump channel (22).

3. The pump of claim 1 or 2, characterized in that the pump channel (22) has more than one winding.

4. The pump of one of claims 1-3, characterized in that the pump channel (22) continuously extends over approximately the entire rotor length, and a fluid inlet (48) and a fluid outlet (50) are provided at an end face of the rotor (16), respectively.

5. The pump of one of claims 1-4, characterized in that the rotor (125) comprises several channel walls (126) that define several pump channels (128,128′

) parallel to each other.

6. The pump of one of claims 1-5, characterized in that the surface area of the blade (38) amounts to between a fifth and half of the crosssectional area of the pump channel.

7. The pump of one of claims 1-6, characterized in that the stator (14) surrounds the rotor (16).

8. The pump of one of claims 1-7, characterized in that the rotor surrounds the stator.

9. The pump of one of claims 1-8, characterized in that the channel wall (20) is arranged so as to be inclined to a radial line (30) of the rotor (16).

10. The pump of one of claims 1-9, characterized in that each of the blades (38) is arranged so as to be inclined to a radial line (42) of the rotor (16).

11. The pump of one of claims 1-10, characterized in that the pump channel cross-section is larger at the suction side (11) than at the pressure side (13) of the pump channel (128).

12. The pump of claim 11, characterized in that the pump channel (80, 81, 82, 83) comprises radial steps (90, 91, 92).

13. The pump of claim 12, characterized in that the height of a radial step (90, 91, 92) of a pump channel is smaller than half the radial pump channel height.

14. The pump of claim 11, characterized in that the stator (106) has a conical configuration.

15. The pump of one of claims 1-14, characterized in that a cooling channel (230) is provided that is arranged between two pump channel sections (222, 222′

).

16. A pump being a side channel pump, comprising

a driven rotor (174) and a stator (171),

a circumferential pump channel (172) at an end face of the rotor (174), the pump channel (172) being defined by the rotor (174) and the stator (171),

blades (184) fixed to the rotor (174) and protruding into the pump channel cross-section, and

a blade-free side channel in the pump channel (172), characterized in

that the pump channel (172) including the side channel spirally extends on the end face of the rotor (174).