The invention provides a device for cleaning and maintaining the interior of a hub in a wind turbine nacelle, belonging to the technical field of wind power equipment. The device comprises a handle component, a switching assembly, a combined cleaning assembly and a maintenance assembly. The switching assembly is connected in a switching shaft block through a switching shaft. A high-temperature steam cleaning mechanism and a negative-pressure contaminant suction mechanism are arranged in the cleaning assembly to remove oil contaminants in the hub in the wind turbine nacelle. The device has a high level of integration, is easy to operate, and can improve the operation stability of a wind turbine.

The invention provides a device for cleaning and maintaining the interior of a hub in a wind turbine nacelle, belonging to the technical field of wind power equipment. The device comprises a handle component, a switching assembly, a combined cleaning assembly and a maintenance assembly. The switching assembly is connected in a switching shaft block through a switching shaft. A high-temperature steam cleaning mechanism and a negative-pressure contaminant suction mechanism are arranged in the cleaning assembly to remove oil contaminants in the hub in the wind turbine nacelle. The device has a high level of integration, is easy to operate, and can improve the operation stability of a wind turbine.

A wind turbine blade having a body having a pressure surface and a suction surface; the wind turbine blade further comprising: an air passage traversing the body, the air passage having an entrance opening and an exit opening; and an air cleaning member provided within the air passage.

A wind turbine blade having a body having a pressure surface and a suction surface; the wind turbine blade further comprising: an air passage traversing the body, the air passage having an entrance opening and an exit opening; and an air cleaning member provided within the air passage.

This invention relates to a wind turbine blade with retrofitted coating in and around areas where the blade is especially exposed to erosion damages, which is established by the coating including a glue layer, a fiber reinforced polymer layer and one or more non-reinforced polymer layers over the fiber reinforced layer, since the polymer layers stretch themselves out over the fiber reinforced layer and includes areas of the wind turbine blade's surface, which are less exposed to erosion damages. A method for creation of such a wind turbine blade and creation of such a coating and the coating itself, is also established with the invention.

This invention relates to a wind turbine blade with retrofitted coating in and around areas where the blade is especially exposed to erosion damages, which is established by the coating including a glue layer, a fiber reinforced polymer layer and one or more non-reinforced polymer layers over the fiber reinforced layer, since the polymer layers stretch themselves out over the fiber reinforced layer and includes areas of the wind turbine blade's surface, which are less exposed to erosion damages. A method for creation of such a wind turbine blade and creation of such a coating and the coating itself, is also established with the invention.

A device (1) for enabling access to a rotor blade (2) of a wind turbine is described, said device (1) comprising a frame (3) having connecting means (4) located at an upper region of said frame (3) and being structured in the range to be connected to a hoisting device. Such a device should be of simple construction, which is easy to control. To this end said frame (3) is in form of a triangle, said connecting means (4) being located in a region of an edge of said triangle.

A device (1) for enabling access to a rotor blade (2) of a wind turbine is described, said device (1) comprising a frame (3) having connecting means (4) located at an upper region of said frame (3) and being structured in the range to be connected to a hoisting device. Such a device should be of simple construction, which is easy to control. To this end said frame (3) is in form of a triangle, said connecting means (4) being located in a region of an edge of said triangle.

A method is disclosed for replacing grease in a main bearing of a wind turbine, the main bearing located in a housing and the housing having least one cover plate. the bearing cover plate is removed from the housing, grease is manually removed from the main bearing, and a flushing cover is installed on the housing in place of the bearing cover plate. The flushing cover has at least two parts, the parts fitting around the main shaft, and each part having a seal so that when its attached to the bearing housing, the flushing cover forms a seal with the main shaft. The flushing cover has holes allowing access to the main bearing, and a solvent or oil is sprayed via one of the holes onto the main bearing to remove grease, the remaining holes being sealed by a removable plug. Solvent or oil is pumped out of the housing via a port at the bottom of the housing or flushing cover. The process is repeated for each hole, and the flushing cover removed, the main bearing packed with grease, and the bearing cover plate re-affixed. The spraying step involves pumping solvent or oil from a reservoir to the spray nozzle, and the step of pumping solvent or oil out of the bearing housing involves pumping solvent or oil to the reservoir via a return hose. This means that the solvent or oil is recycled during the replacing of the grease. An apparatus for flushing grease from a main bearing of a wind turbine is also described.

A method is disclosed for replacing grease in a main bearing of a wind turbine, the main bearing located in a housing and the housing having least one cover plate. the bearing cover plate is removed from the housing, grease is manually removed from the main bearing, and a flushing cover is installed on the housing in place of the bearing cover plate. The flushing cover has at least two parts, the parts fitting around the main shaft, and each part having a seal so that when its attached to the bearing housing, the flushing cover forms a seal with the main shaft. The flushing cover has holes allowing access to the main bearing, and a solvent or oil is sprayed via one of the holes onto the main bearing to remove grease, the remaining holes being sealed by a removable plug. Solvent or oil is pumped out of the housing via a port at the bottom of the housing or flushing cover. The process is repeated for each hole, and the flushing cover removed, the main bearing packed with grease, and the bearing cover plate re-affixed. The spraying step involves pumping solvent or oil from a reservoir to the spray nozzle, and the step of pumping solvent or oil out of the bearing housing involves pumping solvent or oil to the reservoir via a return hose. This means that the solvent or oil is recycled during the replacing of the grease. An apparatus for flushing grease from a main bearing of a wind turbine is also described.