Patent ID: 8786146

Claim:
An electrical machine, comprising: a housing including a casing ( 1 ), an oil inlet hole ( 7 ), an oil passage ( 2 ), oil outlet holes ( 3 ), a stator retainer ( 8 ) and a casing end cover ( 10 ), the oil inlet hole ( 7 ) being located in the casing ( 1 ), the oil outlet holes ( 3 ) being located in the stator retainer ( 8 ), and the oil passage ( 2 ) being located inside the casing ( 1 ) and links with the oil inlet hole ( 7 ) and the oil outlet holes ( 3 ); a stator assembly including a stator iron core ( 5 ), winding coils ( 6 ) and slot insulations ( 12 ), the oil outlet holes ( 3 ) being located above the winding coils ( 6 ); and oil-guides located between the oil outlet holes ( 3 ) and the winding coils ( 6 ), the oil-guides being configured to receive cooling oil from the oil outlet holes ( 3 ) and pour the cooling oil onto the winding coils ( 6 ) in a flow; wherein the cooling oil sequentially enters the oil inlet hole ( 7 ), flows through the oil passage and out of the oil outlet holes ( 3 ), is guided through the oil-guides, and pours onto the winding coils ( 6 ).