Wind turbine powertrain connection

A method for connecting a first wind turbine powertrain component to a second wind turbine powertrain component, the method comprising the steps of:

• aligning the first powertrain component with the second powertrain component,
• inserting at least one bolt into a bolt hole in a first powertrain housing section enclosing at least part of the first powertrain component and into a corresponding bolt hole in a second powertrain housing section enclosing at least part of the second powertrain component,
• fastening the bolt,
• shrink fitting a dowel pin in a dowel pin hole in the first powertrain housing section and into a corresponding dowel pin hole in the second powertrain housing section.

A powertrain for a wind turbine, comprising:

• at least a first powertrain component and a second powertrain component, a rotating output of the first powertrain component being coupled to a rotating input of the second powertrain component;
• a powertrain housing enclosing the powertrain components, the powertrain housing comprising at least a first powertrain housing section enclosing at least part of the first powertrain component and a second powertrain housing section at least part of the second powertrain component;
• and
• a connection between the first and the second powertrain housing sections, comprising:
• a plurality of bolts installed in corresponding bolt holes of the first and the second powertrain housing sections, and
• a plurality of dowel pins installed in corresponding dowel pin holes of the first and the second powertrain housing sections, the dowel pins having been installed in the dowel pin holes by shrink fitting,
• wherein the second powertrain housing section is a gearbox housing and the first powertrain housing section is an intermediate powertrain housing section between a main bearing housing and the gearbox housing.

A powertrain for a wind turbine, comprising:

• at least a first powertrain component and a second powertrain component, a rotating output of the first powertrain component being coupled to a rotating input of the second powertrain component;
• a powertrain housing enclosing the powertrain components, the powertrain housing comprising at least a first powertrain housing section enclosing at least part of the first powertrain component and a second powertrain housing section at least part of the second powertrain component;
• and
• a connection between the first and the second powertrain housing sections, comprising:
• a plurality of bolts installed in corresponding bolt holes of the first and the second powertrain housing sections, and
• a plurality of dowel pins installed in corresponding dowel pin holes of the first and the second powertrain housing sections, the dowel pins having been installed in the dowel pin holes by shrink fitting,
• wherein the first powertrain component is a gearbox and the second powertrain component is a generator.