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US 6,443,711 B1Granted
Inlet bearing lubrication for a screw machine
AssigneeCarrier Corporation
InventorFrederick L. Miller, Jr.
Life of this patent
Estimating the term…
Abstract
The inlet bearings of a screw machine, such as a refrigerant compressor, are both lubricated and cooled by a portion of the motor cooling and suction flow which has lubricant entrained therein and which is drawn through the inlet bearings into the coacting pair(s) of screw rotors.
Claims3
A screw machine comprising:
- means defining a casing having an inlet and an outlet;
- at least two coating rotors located in said casing;
- inlet and outlet bearing means for supporting each of said rotors in said casing;
- motor means located in said casing for driving one of said rotors;
- means for supplying a motor lubricant containing fluid into said casing for cooling said motor;
- means for supplying a bearing lubrication containing fluid into said casing via said inlet;
- said motor means being located in said casing between said means for supplying a motor lubricant containing fluid into said casing for cooling said motor means and said inlet whereby all of said motor lubricant containing fluid supplied to said casing for cooling said motor means must pass through and thereby cool said motor means before combining with said bearing lubricant containing fluid supplied to said casing via said inlet;
- said inlet bearing means providing fluid paths for said bearing lubricant containing fluid supplied via said inlet and for cooling said motor means whereby as said motor means drives said one rotor, at least a portion of said bearing lubricant containing fluid supplied via said inlet and for cooling said motor means passes via said fluid paths and thereby cools and lubricates said inlet bearing means.
5 more elements
Dependencies are inferred from the claim text.