NON-CLOGGING NOZZLE FOR ROTATING EQUIPMENT SUCH AS FOR COOLING DYNAMO-ELECTRIC MACHINES

• US 3,659,125 A
• Filed: 09/10/1970
• Issued: 04/25/1972
• Est. Priority Date: 09/10/1970
• Status: Expired due to Term

• Current Assignee: Donald R. Basel
• Original Assignee: Donald R. Basel
• Inventors: Basel, Donald R.
• Primary Examiner(s): Sliney, D. X.
• Application Number:
  US05/071,005
• Time in Patent Office: 593 Days
• Field of Search: 310/54 239/225,226 210/380
• US Class Current: 310/54
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

A nozzle for spraying fluid outwardly from a rotating member has inner openings that extend non-perpendicularly to the axis of rotation to avoid clogging of the opening by particles acted upon by centrifugal force. The invention is applied in dynamo-electric machines having oil spray cooling of the rotor field coils by oil sprayed out from the hollow rotor shaft.

Claims

1. In combination:

a rotatable member having a wall enclosing a chamber, said chamber containing a fluid;

at least one nozzle on said rotatable member extending through said wall into said chamber with at least one opening proximate each end of said nozzle to permit said fluid to be sprayed outwardly from said rotatable member, said at least one opening proximate the end of said nozzle within said chamber extending in a direction nonperpendicular to the axis of rotation of said rotatable member to avoid clogging of said opening by particles acted upon by centrifugal force upon rotation;

said rotatable member comprising a hollow shaft exteriorly supporting heat generating means to be coolEd by said fluid;

said nozzle being an elongated member having a bore disposed perpendicular to the axis of rotation of said shaft and an outer opening directly at the end of said bore for emission of said fluid in directions perpendicular to said axis;

the inner end of said nozzle being closed facing said axis with a plurality of openings to said bore only from surfaces of said nozzle that run perpendicular to said axis.

2. A dynamo-electric machine comprising:

a stator;

a rotor within said stator and including a centrally located hollow shaft with a center axis of rotation and exteriorly supported field coils;

means to cool said field coils comprising at least one nozzle extending on a radial line from said axis through said shaft and having a center bore open to spray a coolant onto said field coils, the inner end of said nozzle having a plurality of openings for receiving said coolant all of which openings extend into said nozzle perpendicular to surfaces parallel to said axis.

3. The subject matter of claim 2 wherein:

a plurality of said nozzles are in spaced locations around the periphery of said shaft.