CN102678465A - Main machine of wind generating set - Google Patents

Abstract

The present invention discloses a main engine of a wind turbine generator set, and its anti-corrosion coating structure is studied and designed in a targeted manner according to the key parts structure and different materials of the main engine of the wind turbine generator set. Such a coating has the characteristics of high efficiency, reliability and excellent durability, ensuring that the anti-corrosion coating of the main engine of the intertidal zone wind turbine generator set has reliability and durability during its 20-year service life.

Description

A kind of main engine of wind power generating set

【Technical field】

The invention relates to the field of metal anticorrosion protection, in particular to a main engine of a wind power generating set with an anticorrosion coating used in the ocean intertidal zone.

【Background technique】

According to the international standard ISO12944-1, the surface anti-corrosion protection life of the wind turbine main engine that needs long-term protection is at least 15 years, and its anti-corrosion protection goal is to achieve the service life of the wind turbine cabinet main engine for 20 years. According to the international standard ISO12944-2, the corrosion grade of steel structures in the intertidal zone of the ocean is C5-M, which is the area with the most severe corrosion environment and corrosion degree, and is also the focus and difficulty of anti-corrosion protection. The anti-corrosion protection of wind turbine mainframes in the region has brought severe challenges. Therefore, it is very important to design a wind turbine main engine with high efficiency, reliability and excellent durability for use in the intertidal zone of the ocean.

【Content of invention】

The technical problem to be solved by the present invention is to provide a main engine of a wind power generating set used in the ocean intertidal zone, the main engine has an anti-corrosion coating structure with excellent reliability and durability.

In order to solve the above-mentioned technical problems, the present invention provides a main frame of a wind power generating set. According to the structure of key parts and different materials of the main frame of a wind power generating set, different anti-corrosion coating structures are studied and designed in a targeted manner.

A main engine of a wind power generating set, comprising a nacelle body and a nacelle cover buckled with the nacelle body, both the nacelle body and the nacelle cover adopt a glass fiber reinforced plastic structure, the nacelle cover is provided with a structural member outside the nacelle, and the interior of the nacelle body includes Machine base, the machine base is provided with a bearing seat, the bearing seat is equipped with a main shaft, one end of the main shaft is connected to the gearbox, the output end of the gearbox is connected to the generator cabinet, and an electrical cabinet is provided on the side of the generator cabinet , the gear box side is provided with a motor, and the outer support structure of the engine room, machine base, bearing housing, main shaft, motor, and the surface of the gear box are provided with a primer layer, an intermediate paint layer and a top paint layer, a total of three layers of anti-corrosion coatings , the electrical cabinet and the generator cabinet are provided with a layer of anti-corrosion coating.

The primer layer of the base, the main shaft and the motor is an epoxy zinc-rich primer with a zinc content of ≥ 80% with a dry film thickness of 60-70 microns, and the intermediate paint layer is an epoxy cloud with a dry film thickness of 130-140 microns. Iron thick paste paint, the topcoat layer is a modified polyurethane topcoat with a dry film thickness of 50-60 microns, and its total dry film thickness is 240-270 microns; the primer layer of the gear box is a dry film thickness of 60-70 microns Epoxy zinc-rich primer with a zinc content ≥ 80%, the intermediate paint layer is epoxy mica thick build paint with a dry film thickness of 100-110 microns, and the top coat is a modified polyurethane surface with a dry film thickness of 60-70 microns Paint, the total dry film thickness of which is 220-250 microns; the electrical cabinets and generator cabinets are sprayed with plastic, and the coating thickness is 50-100 microns, which meets the performance requirements of insulation and anti-static performance of electrical equipment and anti-salt spray , anti-moisture and heat, and anti-mold requirements; the primer layer of the structural parts outside the engine room is an epoxy zinc-rich primer or hot-dip zinc with a dry film thickness of 80-90 microns, and the intermediate paint layer is a dry film thickness of 160-90 microns. 170-micron epoxy micaceous iron thick build paint, the topcoat layer is a modified polyurethane topcoat with a dry film thickness of 60-70 microns, and the epoxy zinc-rich primer contains zinc with a specific gravity ≥ 80%; for the wind turbine cabinet main unit The connecting bolt components are treated with environmentally friendly chrome-free Dacromet technology, and the dry film thickness of the chrome-free Dacromet coating is controlled to 10-11.9 microns.

The main frame of the wind power generation unit according to the present invention adopts different anti-corrosion coating structures for the structure of key parts and different materials of the main frame, so as to ensure the reliability and protection of the anti-corrosion coating of the main frame of the wind power generation cabinet in the intertidal zone during the 20-year service life. durability.

【Description of drawings】

The specific embodiment of the present invention is described in further detail below in conjunction with accompanying drawing, wherein:

Fig. 1 is an overall schematic diagram of a main engine of a wind generating set according to the present invention.

Fig. 2 is a schematic diagram of the interior of a main engine of a wind power generating set according to the present invention.

【Detailed ways】

The technical solutions of the present invention will be described in further detail below in conjunction with specific implementation methods.

A main engine of a wind power generating set, comprising a nacelle body 1 and a nacelle cover 2 buckled with the nacelle body 1, both the nacelle body 1 and the nacelle cover 2 adopt a glass fiber reinforced plastic structure, and the nacelle cover 2 is provided with a nacelle outer support structure 3 , the cabin body 2 includes a machine base 5, the base 5 is provided with a bearing seat 10, the bearing seat 10 is equipped with a main shaft 4, one end of the main shaft 4 is connected with a gear box 8, and the gear box 8 The output end is connected with the generator cabinet 7, the electrical cabinet 6 is arranged on the side of the generator cabinet 7, the motor 9 is arranged on the side of the gear box 8, the external support structure 3 of the engine room, the machine base 5, the bearing seat 10, and the main shaft 4 , The motor 9, the surface of the gear box 8 are provided with a primer layer, an intermediate paint layer and a topcoat layer with three layers of anti-corrosion coatings, and the electrical cabinet 6 and generator cabinet 7 are provided with one layer of anti-corrosion coating.

The primer layer of the base 5, the main shaft 4 and the motor 9 is an epoxy zinc-rich primer with a dry film thickness of 60-70 microns and a zinc specific gravity ≥ 80%, and the intermediate paint layer is an epoxy zinc-rich primer with a dry film thickness of 130-140 microns. Epoxy micaceous iron thick paste paint, the topcoat layer is a modified polyurethane topcoat with a dry film thickness of 50-60 microns, and its total dry film thickness is 240-270 microns; the primer layer of the gear box 8 is a dry film thickness of 60 microns. -70 micron epoxy zinc-rich primer with a zinc content ≥ 80%, the middle paint layer is epoxy mica thick build paint with a dry film thickness of 100-110 microns, and the top coat is a dry film thickness of 60-70 microns The modified polyurethane topcoat has a total dry film thickness of 220-250 microns; the electrical cabinet 6 and the generator cabinet 7 are sprayed with plastic, and the coating thickness is 50-100 microns, which meets the insulation and anti-static performance of electrical equipment Requirements and anti-salt spray, anti-humid heat, anti-mold three anti-requirements; the primer layer of the frame structure outside the cabin 3 is epoxy zinc-rich primer or hot-dip galvanized with a dry film thickness of 80-90 microns, and the intermediate paint layer It is an epoxy mica thick build paint with a dry film thickness of 160-170 microns, and the topcoat is a modified polyurethane topcoat with a dry film thickness of 60-70 microns, and the epoxy zinc-rich primer contains zinc with a specific gravity ≥ 80%, Compared with the oxygen-containing zinc-rich primer, hot-dip galvanizing has a higher zinc content and can penetrate into the interior of the structural member 3 outside the engine room. It has better cathodic protection and achieves better anti-corrosion effects. Hot-dip galvanizing is preferred as the primer according to the site construction conditions. For the connecting bolt components of the main unit of the wind turbine cabinet, the environmentally friendly chromium-free Dacromet technology is used, and the dry film thickness of the chromium-free Dacromet coating is controlled at 10.0-11.9 microns.

Claims (7)

1. a wind power generating set main frame comprises cabin body (1), and covers (2) with the cabin that cabin body (1) fastens; Said cabin lid (2) is provided with cabin support arm structural member (3), and said cabin body (1) inside comprises support (5), and said support (5) is provided with bearing support (10); Said bearing support (10) is equipped with main shaft (4), and said main shaft (4) one ends are connected with gear-box (8), and said gear-box (8) output terminal is connected with generating rack (7); Said generating rack (7) side is provided with Electric Appliance Cabinet (6), and said gear-box (8) side is provided with motor (9), it is characterized in that: said cabin support arm structural member (3); Support (5), bearing support (10), main shaft (4); Motor (9), gear-box (8) surface is provided with prime coat, and middle enamelled coating and top coat layer be totally three layers of corrosion-inhibiting coating; Said Electric Appliance Cabinet (6), generating rack (7) is provided with one deck corrosion-inhibiting coating.

2. by the said a kind of wind power generating set main frame of claim 1; It is characterized in that said support (5); The prime coat of main shaft (4) and motor (9) is the epoxy zinc rich primer of thickness of dry film >=60 micron; Middle enamelled coating is the thick slurry lacquer of epoxy micaceous iron of thickness of dry film >=130 micron, and top coat layer is the modified polyurethane finish paint of thickness of dry film >=50 micron.

3. by the said a kind of wind power generating set main frame of claim 1; The prime coat that it is characterized in that said gear-box (8) is the epoxy zinc rich primer of thickness of dry film >=60 micron; Middle enamelled coating is the thick slurry lacquer of epoxy micaceous iron of thickness of dry film >=100 micron, and top coat layer is the modified polyurethane finish paint of thickness of dry film >=60 micron.

4. by the said a kind of wind power generating set main frame of claim 1, it is characterized in that said Electric Appliance Cabinet (6), generating rack (7) adopts plastic-blasting to handle, and coating thickness is the 50-100 micron.

5. by the said a kind of wind power generating set main frame of claim 1; The prime coat that it is characterized in that said cabin support arm structural member (3) is the epoxy zinc rich primer of thickness of dry film >=80 micron; Middle enamelled coating is the thick slurry lacquer of epoxy micaceous iron of thickness of dry film >=160 micron, and top coat layer is the modified polyurethane finish paint of thickness of dry film >=60 micron.

6. by the said a kind of wind power generating set main frame of claim 1; The prime coat that it is characterized in that said cabin support arm structural member spare (3) is the galvanizing of thickness of dry film >=80 micron; Middle enamelled coating is the thick slurry lacquer of epoxy micaceous iron of thickness of dry film >=160 micron, and top coat layer is the modified polyurethane finish paint of thickness of dry film >=60 micron.

7. by claim 2 or 3 or 5 said a kind of wind power generating set main frames, it is characterized in that said epoxy zinc rich primer contains zinc weight proportion >=80%.

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