WEATHER-PROTECTED ELECTRIC MACHINE WITH AXIALLY CIRCULATING VENTILATION

• US 3,739,207 A
• Filed: 09/23/1971
• Issued: 06/12/1973
• Est. Priority Date: 10/01/1970
• Status: Expired due to Term

• Current Assignee: Helmut Gaertner, Philipp Keilmann
• Original Assignee: Helmut Gaertner, Philipp Keilmann
• Inventors: Keilmann, Philipp, Gaertner, Helmut
• Primary Examiner(s): Skudy, R.
• Application Number:
  US05/183,008
• Time in Patent Office: 628 Days
• Field of Search: 310/52,53,56,58,59,62,89
• US Class Current: 310/59
• CPC Class Codes: H02K 5/10 with arrangements for protection from ingress, e.g. water or fingers
• CPC Class Codes: H02K 9/26 Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters

Abstract

An axially ventilated dynamo-electric machine for outdoor use includes a rectangular casing located stop the machine housing which is also rectangular, there being an air inlet through a longitudinal wall of the casing into an air entry chamber located within the casing. A baffle arrangement within the casing provides a passageway closed off from the remainder of the space within the casing through which filtered air discharged from the air entry chamber is directed through an opening at one end of the machine housing to the interior thereof for flow axially of the machine to cool it, and this air after passing to the opposite end of the machine housing is delivered through an outlet in the housing into the casing from whence it is discharged to the exterior through outlets provided in the end walls of the casing. A second baffle structure located in the casing at the air outlet from the machine housing and which partially overlaps the first mentioned baffle arrangement cooperates with the latter in directing the air discharge and the entire ventilating structure is so structured that air flow through the machine housing is assured regardless of the direction or strength of the wind.

Claims

1. An axially ventilated dynamo-electric machine which comprises a housing enclosing the machine, said housing having an essentially rectangular configuration, an air-handling casing also having an essentially rectangular configuration of substantially the same dimensions as the top wall of said machine housing and mounted thereon, means forming an air entry chamber within the lower part of said casing spaced from the opposite end walls thereof, at least one lateral air inlet into said air entry chamber from the exterior formed by an aperture in a side wall of said casing extending longitudinally of the machine axis, an air filter disposed across the upper discharge end of said air entry chamber, an air inlet through said top wall of said machine housing adjacent one end thereof to the interior of the machine, a first baffle means located within said casing, said first baffle means closing off the remainder of the space within said casing from said air entry chamber and said air inlet through said top wall of said machine housing and providing a passageway for conducting air from said air entry chamber into said machine at one end thereof, said first baffle means including one ascending wall leading from the discharge side of said filter and one descending wall leading to said air inlet through said top wall of said machine housing, an air outlet through said top wall of said machine housing at the opposite end thereof through which air is discharged into said casing and exteriorly of the space confined by said first baffle means after passing axially through the interior of said machine, a second baffle means located within said casing at said air outlet through said top wall of said machine housing, said second baffle means including an initially steeply inclined first wall section followed by a second wall section of lesser inclination for directing the flow of air from said air outlet through said casing, said second baffle means partially overlying and being spaced from said first baffle means, and air outlets located in the opposite end walls of said casing said second baffle means directing the flow of air warmed by passage through the machine housing to the exterior to said air outlets.

2. An axially ventilated dynamo-electric machine as defined in claim 1 and which further includes screens respectively covering said air inlet to said air entry chamber and said air outlets in the opposite end walls of said casing.