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EP-4332375-B1 - APPARATUS FOR CLEANING AND MAINTAINING INTERIOR OF WIND GENERATOR INNER HUB

EP4332375B1EP 4332375 B1EP4332375 B1EP 4332375B1EP-4332375-B1

Inventors

  • DONG, Chenxi
  • WANG, YUYING
  • YE, JIANQI
  • WANG, Sen
  • Liang, Zheming

Dates

Publication Date
20260506
Application Date
20220323

Claims (9)

  1. A device for cleaning and maintaining the interior of a hub in a wind turbine nacelle, comprising an integrated handgrip (101), and further comprising a handle component (1) and a switching assembly (2); wherein the handle component (1) comprises a switching inner cavity (102) and a switching shaft block (103), and the switching assembly (2) comprises a switching body (201), a switching shaft (202), a switching center gear (203), a switching drive gear (204), a switching drive motor (205), a steam chamber (216), a contaminant collection chamber (217) and an oil filling chamber (218); the integrated handgrip (101) in the handle component (1) is a main structural body of the cleaning and maintenance device, the switching inner cavity (102) runs through the integrated handgrip (101), the switching shaft block (103) is arranged at a middle position of an outer side wall of a main front of the integrated handgrip (101), and the switching shaft (202) is fixed at a middle position of an outer end face of the switching body (201) in the switching assembly (2); the switching shaft (202) is rotatably connected to the switching shaft block (103), and the switching body (201) is located in the switching inner cavity (102); the switching center gear (203) is fixedly inserted in a shaft end face of the switching shaft (202), and the switching drive gear (204) meshes with one side of the switching center gear (203); the switching drive gear (204) is connected with the switching drive motor (205) by a shaft, and the switching drive motor (205) is fixed on the outer side wall of the main front of the integrated handle (101); the switching body (201) is divided into three chambers, namely the steam chamber (216), the contaminant collection chamber (217) and the oil filling chamber (218), and the three chambers are completely isolated; the steam chamber (216) and the contaminant collection chamber (217) are provided with a combined cleaning assembly (3) for high-temperature steam cleaning and negative-pressure contaminant suction; and a maintenance assembly (4) for oiling maintenance is arranged in the oil filling chamber (218).
  2. The device for cleaning and maintaining the interior of a hub in a wind turbine nacelle according to claim 1, wherein an operation port (104) in the handle component (1) is formed at a front end of a main body of the integrated handgrip (101), a contaminant collection position (105) is arranged at a middle position of an outer side wall of a main rear of the integrated handgrip (101), and front and rear surfaces of a rear end of the integrated handgrip (101) are respectively provided with operation handles (106).
  3. The device for cleaning and maintaining the interior of a hub in a wind turbine nacelle according to claim 1, wherein the switching assembly (2) further comprises a steam outlet (219) and a contaminant collection inlet (220), the steam outlet (219) is formed at a position, communicating with the steam chamber (216), of a front end of an outer wall of the switching body (201), and the contaminant collection inlet (220) is formed at a position, communicating with the contaminant collection chamber (217), of the front end of the outer wall of the switching body (201).
  4. The device for cleaning and maintaining the interior of a hub in a wind turbine nacelle according to claim 1, wherein one end of a steam valve (301) in the combined cleaning assembly (3) for high-temperature steam cleaning and negative-pressure contaminant suction which is arranged in the steam chamber (216) and the contaminant collection chamber (217) is connected to a side, near the steam outlet (219), of an outer wall of a cavity of the switching body (201), the other end of the steam valve (301) is connected with an atomizer (302), the other end of the atomizer (302) is connected with a rapid heating pipe (303), the other end of the rapid heating pipe (303) is connected with a water tank (304), and a water tank cover (305) is installed at a top opening of the water tank (304); and a fan installation position (306) is further arranged on the outer wall of the cavity of the switching body (201), the fan installation position (306) is located behind the steam valve (301), a micro fan (307) is inserted in the fan installation position (306), and an air inlet filter element (308) is installed at an air inlet of the micro fan (307).
  5. The device for cleaning and maintaining the interior of a hub in a wind turbine nacelle according to claim 4, wherein a steam cover (309) is fixed on an outer end face of the steam chamber (216), and the steam cover (309) is used for sealing the steam chamber (216); a contaminant collection cover (310) is fixed on an outer end face of the contaminant collection chamber (217), and the contaminant collection cover (310) is used for sealing the contaminant collection chamber (217); and a contaminant collection pump (311) is connected to a main surface of the contaminant collection cover (310), and the other end of the contaminant collection pump (311) is connected with a contaminant collection cylinder (312).
  6. The device for cleaning and maintaining the interior of a hub in a wind turbine nacelle according to claim 1, wherein a cleaning head (313) is inserted in the operation port (104), a main body of the cleaning head (313) is of an elastic telescopic structure which can be stretched back and forth and can also be bent up and down, left and right, a fixed end of the cleaning head (313) communicates with both the steam outlet (219) and the contaminant collection inlet (220), and a front end of the cleaning head (313) is of a wide-mouth structure.
  7. The device for cleaning and maintaining the interior of a hub in a wind turbine nacelle according to claim 1, wherein an oil filling pipe base (401) in the maintenance assembly (4) for oiling maintenance arranged in the oil filling chamber (218) is arranged on a front end face of the oil filling chamber (218), an oil filling pipe (402) is inserted into the oil filling pipe base (401), and a tail end of the oil filling pipe (402) is connected to one side of a lower end of an oiler (403); a propulsion slide base (404) is fixed to a bottom of the oiler (403), the propulsion slide base (404) is connected in a propulsion screw (405) in an adaptive manner, a front end of the propulsion screw (405) is rotatably connected to a front screw base (406), a rear end of the propulsion screw (405) is rotatably connected to a rear screw base (407), and the front screw base (406) and the rear screw base (407) are fixed on an inner wall of the oil filling chamber (218); an end shaft of the propulsion screw (405) is connected with a screw motor (408), and the screw motor (408) is fixed on the inner wall of the oil filling chamber (218); an oiler slide base (410) is fixed on an outer wall of the oiler (403), an upper wall of an inner cavity of the oil filling chamber (218) is provided with an oiler slide position (409), and the oiler slide base (410) is slidably connected in the oiler slide position (409); a top of the oiler (403) is provided with an oil filling cover (411), a middle position of a top of the oil filling cover (411) is provided with an oil extrusion rack base (412), an oil extrusion rack (413) is slidably connected in the oil extrusion rack base (412), a piston column (416) is fixed at a lower end of the oil extrusion rack (413), and the piston column (416) is located in an inner cavity of the oiler (403); and one side of the oil extrusion rack (413) meshes with an oil extrusion gear (414), the oil extrusion gear (414) is connected with an oil extrusion motor (415) by a shaft, and the oil extrusion motor (415) is fixed on the upper end face of the oil filling cover (411).
  8. The device for cleaning and maintaining the interior of a hub in a wind turbine nacelle according to claim 1, wherein two ends of a bottom surface of a main body of the switching body (201) are respectively provided with auxiliary locking positions (206), and auxiliary ball positions (207) corresponding to the auxiliary locking positions (206) in position are arranged on the outer wall of the main front of the integrated handgrip (101); an auxiliary ball locking position (208) is fixed at a bottom end of the auxiliary ball position (207), a ball (209) is slidably connected in the auxiliary ball position (207), a compression spring base (211) is fixed at an upper end of the auxiliary ball position (207), and a compression spring (210) is elastically connected between the ball (209) and the compression spring base (211); a plurality of groups of gear locking positions (212) are uniformly arranged on an outer main surface of the switching center gear (203) centered on the switching shaft (202); a gear locking position base (213) is fixed on the outer wall of the main front of the integrated handgrip (101), and a gear ball position (214) is arranged on a side, near the switching center gear (203), of the gear locking position base (213); a gear ball locking position (215) is fixed at a bottom end of the gear ball position (214), and the ball (209), the compression spring (210) and the compression spring base (211) are common parts; and another group of balls (209) are slidably connected in the gear ball position (214), another group of compression spring bases (211) are fixed at an upper end of the gear ball position (214), and another group of compression springs (210) are elastically connected between another group of balls (209) and the compression spring bases (211).
  9. The device for cleaning and maintaining the interior of a hub in a wind turbine nacelle according to claim 8, wherein an inner diameter of the auxiliary ball locking position (208) is smaller than that of the auxiliary ball position (207), an inner diameter of the gear ball locking position (215) is smaller than that of the gear ball position (214), a main body of the ball (209) has the same dimension as the auxiliary ball locking position (208) and the gear ball locking position (215), and a rear base of the ball (209) has the same dimension as the auxiliary ball position (207) and the gear ball position (214).

Description

BACKGROUND OF THE INVENTION 1. Technical Field The invention relates to the technical field of wind power equipment, in particular to a device for cleaning and maintaining the interior of a hub in a wind turbine nacelle. 2. Description of Related Art The increasing energy scarcity and environmental pollution faced by humanity have led to a growing recognition of the importance of wind power generation. China has abundant wind energy resources, with great potential for utilization. Therefore, the development of wind power generation is progressing rapidly, and the demand for maintenance is becoming increasingly urgent. Proper cleaning and maintenance of a wind turbine generator system are crucial to prolonging the lifespan and ensuring the stable operation of wind power equipment. Moreover, if not cleaned in a timely and thorough manner, oil contaminants that no longer provide lubrication can not only affect the normal operation of the equipment but also cause environmental pollution if leaked. Additionally, oil leakage and contamination in the wind turbine generator system pose considerable safety risks, as they may corrode components or cause fire hazards. Traditional cleaning devices for wind turbine nacelles often only clean the dust inside a hub of the nacelle. For example, the prior art (CN 211071134 U) discloses an internal dust cleaning device for production of a wind turbine nacelle cover, which comprises a fixed base and two fixed plates; opposite outer walls of the two fixed plates are fixedly connected to the same connecting shaft, and an outer wall of the connecting shaft is sleeved with a fixed sleeve; an outer wall of the fixed sleeve is sleeved with a wind chamber pipe, and each port of the wind chamber pipe is fixedly connected to a dust suction nozzle; one side of one fixed plate is provided with a supporting plate on the outer wall, and a top outer wall of the supporting plate is provided with a dust collection box; one side of the other fixed plate is provided with a pull rod on the outer wall, and a top outer wall of the dust collection box is provided with an air pump; an intake end of the air pump is connected to the inside of the wind chamber pipe through a pipeline; and by arranging the wind chamber pipe and connecting a dust suction nozzle to each intake end of the wind chamber pipe, dust in different positions within the nacelle can be cleaned. However, in practical operation, this simple device can only clean the dust scattered on the surface inside the hub of the nacelle and cannot remove oil contaminants that have stronger adhesion. Manual spraying of oil removal agents is required for oil contaminant removal. Additionally, after oil contaminants are removed, manual lubrication and maintenance of relevant transmission components are needed, which is time-consuming, labor-intensive, and inefficient. US 2021/052754 A1 discloses a device suitable for cleaning and maintaining the interior of a hub in a wind turbine nacelle, comprising an integrated handgrip, and further comprising a handle component and a switching assembly; wherein the handle component comprises a switching inner cavity and a switching shaft block, and the switching assembly comprises a switching body, a switching shaft, a steam chamber and a contaminant collection chamber. BRIEF SUMMARY OF THE INVENTION A device for cleaning and maintaining the interior of a hub in a wind turbine nacelle comprises an integrated handgrip, and further comprises a handle component and a switching assembly, wherein the handle component comprises a switching inner cavity and a switching shaft block, and the switching assembly comprises a switching body, a switching shaft, a switching center gear, a switching drive gear, a switching drive motor, a steam chamber, a contaminant collection chamber and an oil filling chamber; the integrated handgrip in the handle component is a main structural body of the cleaning and maintenance device, the switching inner cavity runs through the integrated handgrip, the switching shaft block is arranged at a middle position of an outer side wall of a main front of the integrated handgrip, and the switching shaft is fixed at a middle position of an outer end face of the switching body in the switching assembly; the switching shaft is rotatably connected to the switching shaft block, and the switching body is located in the switching inner cavity; the switching center gear is fixedly inserted in a shaft end face of the switching shaft, and the switching drive gear meshes with one side of the switching center gear; the switching drive gear is connected with the switching drive motor by a shaft, and the switching drive motor is fixed on the outer side wall of the main front of the integrated handle; the switching body is divided into three chambers, namely the steam chamber, the contaminant collection chamber and the oil filling chamber, and the three chambers are completely isolated; the steam chamber and th