Transmission system and wind turbine generator system

A transmission system, comprising:

• a gearbox, comprising a housing, an output shaft and a bearing, the output shaft being rotatably connected with the housing through the bearing;
• and
• a generator, comprising a rotor, a stator and a packaging assembly, the stator being connected with the housing, the rotor being connected with the output shaft, and the packaging assembly comprising a cover, a first connecting member and a second connecting member, wherein the cover is located on the same side of both the output shaft and the rotor, is connected and fixed with the rotor through the first connecting member, and is connected and fixed with the output shaft through the second connecting member;
• wherein the cover is insulated from both the first connecting member and the rotor, and the cover is insulated from both the second connecting member and the output shaft;
• the first insulating member comprises a first insulating sleeve, a first inner insulating part and a first outer insulating part, the first connecting member comprises a first end cap, and the first outer insulating part is clamped between the first end cap and the cover;
• and
• the packaging assembly further comprises a first force-equalizing ring, which is clamped between the first outer insulating part and the first end cap, and a central axis of the first force-equalizing ring coincides with a central axis of the transmission system.