Planetary gear train with oiling system for supplying lubricant oil to bearing of planetary gear and wind turbine generator incorporating the same

1. A planetary gear train, comprising:

a planetary gear;

a planetary pin for supporting said planetary gear;

a carrier for supporting said planetary pin; and

a housing for accommodating at least a portion of said carrier, said planetary gear and said planetary pin,

wherein said planetary gear is rotatable with respect to the planetary pin by a bearing;

wherein an oiling flow path for supplying lubricant oil to said bearing is formed inside the carrier,

wherein said carrier is configured to receive said lubricant oil into said oiling flow path from an oiling member stationarily fixed to said housing,

wherein an inlet for receiving the lubricant oil into the oiling flow path of the carrier from the oiling member is positioned inside the housing,

wherein said carrier includes:

a carrier main body to which said planetary pin is fixed; and

an extending member formed as a member distinct from said carrier main body and jointed with said carrier main body,

wherein said inlet of the oiling flow path of the carrier is provided for said extending member,

wherein a seal structure to be slid against said extending member is attached to said oiling member,

wherein said extending member has a sliding surface configured to be slid against said seal structure,

wherein said inlet of said oiling flow path of said carrier is provided through said sliding surface, and

wherein said sliding surface is surface-processed to be smooth.

2. The planetary gear train according to claim 1 , wherein said carrier main body is casted.

3. The planetary gear train according to claim 1 ,

wherein said seal structure includes first and second sealing members, and

wherein said inlet of said oiling flow path of said carrier is positioned between said first and second sealing members and said first and second sealing members form a flow path for supplying said lubricant oil from said oiling member to said oiling flow path of said carrier.

4. The planetary gear train according to claim 2 , wherein said seal structure includes first and second sealing members, and

wherein said inlet of said oiling flow path of said carrier is positioned between said first and second sealing members and said first and second sealing members form a flow path for supplying said lubricant oil from said oiling member to said oiling flow path of said carrier.

5. The planetary gear train according to claim 1 ,

wherein said bearing is a sliding bearing, and

wherein said oiling flow path provided inside said carrier is structured to supply said lubricant oil to a surface of said sliding bearing.

6. The planetary gear train according to claim 2 ,

wherein said bearing is a sliding bearing, and

wherein said oiling flow path provided inside said carrier is structured to supply said lubricant oil to a surface of said sliding bearing.

7. The planetary gear train according to claim 3 ,

wherein said bearing is a sliding bearing, and

wherein said oiling flow path provided inside said carrier is structured to supply said lubricant oil to a surface of said sliding bearing.

8. A wind turbine generator, comprising:

a wind turbine rotor including a rotor head and a wind turbine blade coupled with said rotor head;

a gear box including an input shaft coupled to said rotor head; and

a power generator coupled to an output shaft of said gear box,

wherein said gear box includes:

a housing; and

a planetary gear train,

wherein said planetary gear train comprises:

a planetary gear;

a planetary pin for supporting said planetary gear; and

a carrier for supporting said planetary pin,

wherein said housing accommodates at least a portion of said carrier, said planetary gear and said planetary pin,

wherein said planetary gear is rotatable with respect to said planetary pin by a bearing,

wherein an oiling flow path for supplying lubricant oil to said bearing is formed inside said carrier,

wherein said carrier is configured to receive said lubricant oil into said oiling flow path from an oiling member stationarily fixed to said housing,

wherein said inlet for receiving said lubricant oil into said oiling flow path of said carrier from said oiling member is positioned inside said housing,

wherein said carrier includes:

a carrier main body to which said planetary pin is fixed; and

an extending member formed as a member distinct from said carrier main body and jointed with said carrier main body,

wherein said inlet of the oiling flow path of the carrier is provided for said extending member,

wherein a seal structure to be slid against said extending member is attached to said oiling member,

wherein said extending member has a sliding surface configured to be slid against said seal structure,

wherein said inlet of said oiling flow path of said carrier is provided through said sliding surface, and

wherein said sliding surface is surface-processed to be smooth.

9. The wind turbine generator according to claim 8 ,

wherein said bearing is a sliding bearing, and

wherein said oiling flow path provided inside said carrier is structured to supply said lubricant oil to a surface of said sliding bearing.

10. A seal member provided for said seal structure of the planetary gear train according to claim 1 .

11. A manufacture method for manufacturing a carrier of a planetary gear train, said manufacture method comprising steps of:

manufacturing a carrier main body by casting having a first oiling flow path provided inside thereof and to support a planetary pin;

manufacturing an extending member having a second oiling flow path provided inside thereof for receiving lubricant oil from an oiling member provided for a stationary body;

performing surface-processing on a sliding surface of said extending member to be smooth, said sliding surface being to be slid against a seal attached to the oiling member; and

coupling said carrier main body with said extending member so that said first oiling flow path and said second oiling flow path are connected.