Portable crane system for wind turbine components

1. A portable crane assembly for servicing a wind turbine comprising:

a first primary support member and a second primary support member being rotatably attached to one another and having a common axis, the first primary support member extending through a hatch in a nacelle casing of a nacelle of a wind turbine, and the first primary support member being stationary and configured to attach to an attachment plate, the attachment plate being configured to attach to the wind turbine component though the hatch, the second primary support being freely rotatable around the common axis and being capable of rotating 360 degrees with respect to the stationary first primary support member;

a plurality of movable secondary support members being configured to attach to the first primary support member by a collar, wherein the plurality of movable secondary support members are configured to support and anchor the first and second primary support members, wherein the plurality of movable secondary support members are operable to attach to the wind turbine at an angle by a plurality of secondary support fasteners;

a boom member being pivotably attached to an end of the second primary support member;

a plurality of secondary boom supports being configured to attach to the boom member, the plurality of secondary boom supports adapted to support the boom member;

a boom actuator attached to the second primary support member and the boom member, the boom actuator capable of pivoting the boom member at an angle with respect to the first and second primary support members;

wherein the portable crane assembly is capable of being assembled through the hatch on the nacelle of the wind turbine; and

wherein the portable crane assembly is disassemblable into components that can be manually carried to or from the nacelle of the wind turbine.

2. The portable crane assembly of claim 1 , wherein the components that can be manually carried are less than about 30 kg.

3. The portable crane assembly of claim 1 , wherein the portable crane assembly is capable of lifting components selected from the group consisting of blade pitch drives, yaw drives, pitch batteries, brake disks, high speed shaft couplings, oil coolers, oil filters, oil pumps, generator components, gearbox bearings, generator bearings, controller components, cables, and large and/or heavy service tools.

4. The portable crane assembly of claim 1 , wherein the portable crane assembly is capable of lifting components selected from the group consisting of complete generator coolers, complete generator assemblies, and gearbox housings.

5. A wind turbine servicing system comprising:

a first crane assembly and a second crane assembly arranged and disposed on a wind turbine, the first crane assembly comprising:

a first primary support member and a second primary support member being rotatably attached to one another and having a common axis, the first primary support member extending through a hatch in a nacelle of the wind turbine, and the first primary support member being stationary and configured to attach to an attachment plate, the attachment plate being configured to attach to the wind turbine component though the hatch, the second primary support being freely rotatable around the common axis and capable of rotating 360 degrees with respect to the stationary first primary support member of the wind turbine servicing system;

a plurality of movable secondary support members being configured to attach to the first primary support member by a collar, wherein the plurality of movable secondary support members are configured to support and anchor the first and second primary support members, wherein the plurality of movable secondary support members are operable to attach to the wind turbine at an angle by a plurality of secondary support fasteners;

a boom member being pivotably attached to an end of the second primary support member;

a plurality of secondary boom supports being configured to attach to the boom member, the plurality of secondary boom supports adapted to support the boom member;

a boom actuator attached to the second primary support member and the boom member, the boom actuator capable of pivoting the boom member at an angle with respect to the first and second primary support members;

wherein the portable crane assembly is capable of being assembled through the hatch on the nacelle; and

wherein the first and second crane assemblies are disassemblable into components that can be manually carried to or from the nacelle of the wind turbine; and

the second crane assembly is arranged and disposed to permit manipulation of components within the wind turbine, the second crane assembly comprising:

a post member and a extendable swing member being rotatably attached to one another, the post member being stationary and configured to attach to an a wind turbine component, the extendable swing member being capable of rotating 360 degrees with respect to the stationary post member of the wind turbine servicing system.

6. The wind turbine servicing system of claim 5 , wherein the components that can be manually carried are less than about 30 kg.

7. The wind turbine servicing system of claim 5 , wherein the portable crane assembly is capable of lifting components selected from the group consisting of blade pitch drives, yaw drives, pitch batteries, brake disks, high speed shaft couplings, oil coolers, oil filters, oil pumps, generator components, gearbox bearings, generator bearings, controller components, cables, large and/or heavy service tools and combinations thereof.

8. The wind turbine servicing system of claim 5 , wherein the portable crane assembly is capable of lifting components selected from the group consisting of complete generator coolers, complete generator assemblies, gearbox housings and combinations thereof.