Dynamoelectric machine having end shields for improved ventilation

Claim 2

A dynamoelectric machine comprising a stator including a frame, a rotor mounted within the stator for rotation relative thereto, and end shields mounted at each end of the frame, at least one said end shield being characterized by: a. a hub; b. a plurality of peripherally spaced support members on said hub for mounting said hub in a spaced relation with respect to the frame end, each said support member having an inner surface thereon mated with said frame to form a discrete joint therewith, and each said inner surface being formed to extend over an arc no greater than 15* at said joint, c. air inlet openings within said end shield to provide for entry of air to the end turn cavity of the dynamoelectric machine, d. air exhaust openings between said end shield and said stator frame intermediate said support members, and e. a deflection flange overlapping the end of the frame in spaced relationship thereto to direct air exiting from said outlet openings along the exterior of the frame.

Claim 3

The combination of claim 1, wherein the total arcuate extent of the sum of said joint does not exceed 90*, and further including an air deflector mounted on each of said end shields between said air inlet openings and said air outlet openings; said air deflector defining a first air flow path from said air inlet openings into the interior of the machine and a second air flow path out from the interior of the machine through said air outlet openings.

Claim 4

A dynamoelectric machine comprising a stator including a frame, a rotor mounted within the stator for rotation relative thereto, and end shields mounted at each end of the frame, at least one said end shield being characterized by: a. a hub, b. a plurality of peripherally spaced support members on said hub for mounting said hub in a spaced relation with respect to the frame end, each of said support members having a rabbet thereon and the frame end having mating rabbets thereon such that a plurality of discrete rabbet joints are formed upon mounting each said end shield at its respective frame end, c. air inlet openings within said end shield to provide for entry of air to the end turn cavity of the dynamoelectric machine, d. air exhaust openings between said end shield and said stator frame intermediate said support members, and e. a deflection flange overlapping the end of the frame in spaced relationship thereto to direct air exiting from said outlet openings along the exterior of the frame.

Claim 5

A dynamoelectric machine comprising a stator including a frame, a rotor mounted within the stator for rotation relative thereto, and end shields mounted at each end of the frame, at least one said end shield being characterized by: a. a hub, b. a plurality of peripherally spaced support members on said hub for mounting said hub in a spaced relation with respect to the frame end, each of said support members having a rabbet thereon and the frame end having mating rabbets thereon such that a plurality of discrete rabbet joints are formed upon mounting each said end shield at its respective frame end, c. air inlet openings within said end shield to provide for entry of air to the end turn cavity of the dynamoelectric machine, d. air exhaust openings between said end shield and said stator frame intermediate said support members, and e. a deflection flange overlapping the end of the frame in spaced relationship thereto to direct air exiting from said outlet openings along the exterior of the frame.

Claim 6

A dynamoelectric machine comprising a stator including a frame, a rotor mounted within the stator for rotation relative thereto, and end shields mounted at each end of the frame, at least one said end shield being characterized by: a. a hub, b. a plurality of peripherally spaced support members on said hub for mounting said hub in a spaced relation with respect to the frame end, c. air inlet openings within said end shield to provide for entry of air to the end turn cavity of the dynamoelectric machine, d. air exhaust openings between said end shield and said stator frame intermediate said support members, and e. a deflection flange overlapping the end of the frame in spaced relationship thereto to direct air exiting from said outlet openings along the exterior of the frame, said deflection flange being of L-shaped cross section; a first leg of said L-shaped cross section extending radially in spaced relation to the frame end and a second leg extending perpendicularly from said first leg in overlapping spaced relation with respect to said frame, said second leg having an enhanced thickness adjacent said support members.

Claim 7

A dynamoelectric machine comprising a stator including a frame, a rotor mounted within the stator for rotation relative thereto, and end shields mounted at each end of the frame, at least one said end shield being characterized by: a. a hub, b. a plurality of peripherally spaced support members on said hub for mounting said hub in a spaced relation with respect to the frame end, c. air inlet openings within said end shield to provide for entry of air to the end turn cavity of the dynamoelectric machine, d. air exhaust openings between said end shield and said stator frame intermediate said support members, and e. a deflection flange overlapping the end of the frame in spaced relationship thereto to direct air exiting from said outlet openings along the exterior of the frame, said deflection flange being of L-shaped cross section; a first leg of said L-shaped cross section extending radially in spaced relation to the frame end and a second leg extending perpendicularly from said first leg in overlapping spaced relation with respect to said frame, said second leg having an enhanced thickness adjacent said support members.

Claim 8

In a dynamoelectric machine comprising a stator including a frame, and a rotor mounted within the stator for rotation relative thereto, an end shield mounted aT each end of the frame, at least one end shield comprising: a. a hub, b. a plurality of peripherally spaced support members on said hub for mounting said hub in a spaced relation with respect to the frame end, each of said support members having a rabbet thereon and the frame end having mating rabbets thereon such that a plurality of discrete rabbet joints are formed upon mounting each said end shield at its respective frame end, c. air inlet openings within said end shield to permit entry of air to said machine, d. air outlet openings between adjacent support members to provide for exit of air from the interior of the dynamoelectric machine, e. an air deflector mounted on each of said end shields between said air inlet openings and said air outlet openings, said air deflector defining a first air flow path from said air inlet openings into the interior of the machine and a second air flow path out from from the interior of the machine through said air outlet openings, and f. a deflection flange extending between said air inlet and air outlet openings and also overlapping the end of the frame in spaced relationship thereto to direct the air exiting from the dynamoelectric machine axially along the exterior of the frame.

Claim 9

In a dynamoelectric machine comprising a stator including a frame, and a rotor mounted within the stator for rotation relative thereto, an end shield mounted aT each end of the frame, at least one end shield comprising: a. a hub, b. a plurality of peripherally spaced support members on said hub for mounting said hub in a spaced relation with respect to the frame end, each of said support members having a rabbet thereon and the frame end having mating rabbets thereon such that a plurality of discrete rabbet joints are formed upon mounting each said end shield at its respective frame end, c. air inlet openings within said end shield to permit entry of air to said machine, d. air outlet openings between adjacent support members to provide for exit of air from the interior of the dynamoelectric machine, e. an air deflector mounted on each of said end shields between said air inlet openings and said air outlet openings, said air deflector defining a first air flow path from said air inlet openings into the interior of the machine and a second air flow path out from from the interior of the machine through said air outlet openings, and f. a deflection flange extending between said air inlet and air outlet openings and also overlapping the end of the frame in spaced relationship thereto to direct the air exiting from the dynamoelectric machine axially along the exterior of the frame.