Device for air cooling bearing of hermetic dynamic machine

Details Device for air cooling bearing of hermetic dynamic machine Device for air cooling bearing of hermetic dynamic machine

1987-12-15

1989-03-21

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 62, 310 89, 384321, 384476, H02K 906, H02K 708

Patent

active

048146536

ABSTRACT:
A hermetic dynamic machine has a main part supporting a rotor shaft and having a main part cooler, an external fan provided on one end of the rotor shaft, an end cover which covers the end of the main part adjacent to the external fan and having a cooling air inlet formed therein, a bearing provided on the portion of the rotor shaft adjacent to the external fan. The dynamic machine further has a cooling air system which is constituted by a first cooling air passage for guiding the flow of the cooling air from the air inlet to the external fan, a second cooling air passage through which air for cooling the bearing flows and a third cooling air passage through which cooling air from the external fan is introduced into the main part cooler. A first connecting pipe provides a communication between the first and second cooling air passages, while a second connecting pipe provides communication between the second and third cooling air passages. Part of air induced by the external fan through the cooling air inlet is introduced into the second cooling air passage through the first connecting pipe for cooling the bearing. The air after cooling the bearing merges through the second connecting pipe into the cooling air in the third cooling air passage so as to take part in cooling of the main part of the machine.

REFERENCES:
patent: 2394517 (1946-02-01), Ingalls
patent: 2680001 (1954-06-01), Batt

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