Screw Pump
AssigneeSkf Lubrication Systems Germany GmbH
InventorsMichael Schwaiger, Juergen Kreutzkaemper, Arno Poetzsch, Holger Schmidt
Life of this patent
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Abstract
A screw pump for transporting a fluid, with a drive spindle having a drive spindle profile and with at least one running spindle having a running spindle profile, the running spindle engages with its running spindle profile at least partially in the drive spindle profile of the drive spindle, the drive spindle profile and/or the running spindle profile is formed as a rolled profile, and a method for producing a spindle for such a screw pump, and a method for producing a groove in such a spindle are disclosed.
Claims11
A screw pump for transporting a fluid, the screw comprising:
- a drive spindle having a drive spindle profile, and
- at least one running spindle having a running spindle profile, wherein
- the running spindle engages with its running spindle profile at least partially in the drive spindle profile of the drive spindle, and wherein
- at least one of the drive spindle profile and the running spindle profile is formed as a rolled profile.
A method for producing a spindle profile of a spindle of a screw pump, comprising:
- forming the spindle profile in a cold rolling process.
A method for producing a lubricant groove with a first groove wall and a second groove wall and a groove base arranged in-between, wherein the lubricant groove is formed on an outer edge of at least one of a drive spindle and a running spindle of a screw pump, and the groove base is offset substantially radially inwardly from the outer edge of the spindle, wherein the method comprises:
- a. creating a first spindle profile flank by rolling;
- b. forming a first groove wall by displacement of material on rolling of the first profile flank;
- c. creating a second spindle profile flank by rolling;
- d. forming a second groove wall by displacement of material upon rolling of the second profile flank.
Dependencies are inferred from the claim text.