Framework air duct for wind turbine generator air-air cooler

Abstract

The utility model discloses a framework air duct for an air cooler of a generator of a wind turbine generator, which comprises an air duct, the air duct is formed by coating glass fiber cloth with silicon-titanium glue to form an air duct, the glass fiber cloth is obliquely cut to ensure that a seaming seam after seaming spirally ascends along the air duct, and the starting point and the end point of the seaming seam are positioned on the same vertical line. The air duct is uniformly stressed along the axis; a steel wire framework made of metal wires is arranged in the middle of the air duct to support the air duct from inside; and a suspension is arranged outside the air duct. The utility model belongs to the technical field of wind power, particularly provides a framework air duct for an air-air cooler of a generator of a wind turbine generator, and aims to solve the problems that in the prior art, the fire protection grade of a framework air duct cannot meet the wind power fireproof requirement, a coating layer is easy to age, crack and fall off, and glass fiber cloth is not wear-resistant, so that the service life of the air duct is short; meanwhile, the falling of the air duct seriously affects ventilation.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power, and specifically refers to a skeleton air duct for an air-to-air cooler of a wind turbine generator. Background Art

[0002] At present, the skeleton air ducts used in the air-to-air coolers of wind turbine generators are mostly made of 0.3mm chloroprene rubber coated with glass fiber cloth, and the fire protection level cannot meet the fire protection requirements of wind power. After long-term work, the performance of chloroprene rubber changes, aging and cracking are serious, and it is easy to fall off. The glass fiber is not wear-resistant. After the coating layer is denatured, the skeleton steel wire will wear the glass fiber cloth, and the skeleton steel wire will pop out after wear. The air duct is also easily worn by nearby hard objects and is very easy to be damaged. In addition, because the air duct is heavy and falls seriously, it increases ventilation resistance and affects ventilation. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a skeleton air duct for the air-to-air cooler of a wind turbine generator, which is used to solve the problems in the prior art that the fire protection level of the skeleton air duct cannot meet the fire protection requirements of wind power, the coating layer is prone to aging, cracking, and falling off, is not wear-resistant and has a short service life, and falling seriously affects ventilation.

[0004] The technical solutions adopted in this application are as follows:

[0005] This solution provides a skeleton air duct for an air-to-air cooler of a wind turbine generator, comprising an air duct;

[0006] The air duct is composed of glass fiber cloth coated with silicon titanium glue, the thickness of the air duct is 0.4mm, the glass fiber cloth is cut obliquely to ensure that the seam after stitching rises spirally along the air duct, and the starting point and end point of the seam are located on a vertical line to ensure that the air duct is evenly stressed along the axis; there is a mesh steel wire interlayer in the glass fiber cloth.

[0007] A steel wire frame is provided in the middle of the wind tube to support the wind duct from the inside;

[0008] A suspension is arranged outside the wind tube.

[0009] As a further elaboration of the scheme, the steel wire skeleton is made of 5mm welded steel wire to form a closed loop skeleton, which prevents the steel wire from wearing and fixing the fabric, thereby ensuring that the air duct has lasting strength.

[0010] In the preferred embodiment, the suspension is evenly distributed on the outside of the wind tube, and is wrapped with glass fiber cloth of the same type and then sewn to prevent the steel wire skeleton from wearing the glass fiber cloth in the air duct. The suspension is arranged in two rows axially with respect to the wind tube, and the two rows of suspension form a 90° angle in the corresponding circumferential direction.

[0011] In a further solution, the suspension extends out of the air duct and is equipped with a basket nut, through which a suspension rope in the vertical direction suspends the skeleton air duct, and a limit pull ring is formed in the horizontal direction to prevent adjacent hard objects from wearing the air duct.

[0012] As a preferred solution, the glass fiber cloth is spirally sewn with aramid sewing thread, which has a high fire resistance level, high strength, and no defects such as skipping and breaking.

[0013] Furthermore, the glass fiber cloth at both ends of the air duct is folded inward and sewn, and a throat clamp fixing strap is sewn circumferentially. Preferably, 12 groups of throat clamp fixing straps are provided, and throat clamps are required to fix the two ends of the air duct on the equipment.

[0014] The beneficial effects achieved by the utility model using the above structure are as follows:

[0015] 1. This solution uses silicon titanium glue coated glass fiber cloth to ensure that the air duct meets the requirements of wind power fire protection, and metal wire is sandwiched in the middle to ensure that the air duct has long-lasting strength.

[0016] 2. As the air duct is long, multiple hanging points are set outside the air duct to ensure that the air duct does not sag during long-term operation. At the same time, in order to prevent the installation of too many metal structures around the air duct that may wear the air duct, a limit pull ring is set in the horizontal direction of the air duct to prevent wear.

[0017] 3. The air duct is cut obliquely from the glass fiber cloth to ensure that the seam after sewing rises spirally along the air duct. The starting point and end point of the seam are located on a vertical line to ensure that the air duct is evenly stressed along the axis. This solves the problem in the prior art that the sewing seam of the air duct adopts a straight seam, the flexible air duct will be deformed, and it is easy to be damaged after working for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a skeleton air duct for an air-to-air cooler of a wind turbine generator provided in this solution;

[0019] Figure 2 for Figure 1 Schematic diagram of the internal structure of part A;

[0020] The meanings of the numbers in the accompanying drawings are as follows:

[0021] 1. Air duct, 2. Sutured seam, 3. Steel wire frame, 4. Suspension, 5. Belt strip, 6. Hose clamp fixing strap.

[0022] In the figure, a is a sewing seam, b is a glass fiber cloth of the same type; 41, turnbuckle nut 1, 42, turnbuckle nut 2. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Example 1

[0025] Please refer to Figure 1 As shown, this embodiment provides a skeleton air duct for an air-to-air cooler of a wind turbine generator, including an air duct 1.

[0026] The air duct 1 is formed by glass fiber cloth coated with silicon titanium gel, and the thickness of the air duct is 0.4-0.45mm. There is a mesh steel wire interlayer in the glass fiber cloth.

[0027] The glass fiber cloth is cut obliquely to ensure that the sewing seam 2 after sewing rises spirally along the air duct 1, and the starting point and the end point of the sewing seam 2 are located on a vertical line, ensuring that the air duct 1 is evenly stressed along the axis.

[0028] refer to Figure 2 As shown, three stitching lines are used on each side, and the glass fiber cloth is sewn with spiral seams using aramid sewing thread, without defects such as skipped stitches and broken stitches.

[0029] If the sewing seam of the air duct 1 is a straight seam, the flexible air duct 1 will be deformed. Specifically, it cannot be placed upright on the ground, and it will be deformed after installation. It is easy to be damaged after long-term work. The above operation can ensure that the air duct 1 does not deform.

[0030] Among them, silicone belongs to inorganic glue, and silicone coated glass fiber refractory cloth is a flexible material with good fire resistance. It is Class A non-combustible and has the advantages of corrosion resistance, oxidation resistance, UV resistance, long service life, oil and water resistance, softness and easy cutting, etc.

[0031] A steel wire frame 3 is provided in the middle of the air duct to support the air duct 1 from the inside.

[0032] The maximum stretching of the ring pitch is 85mm. When stretched to 80mm, the outer length is measured and the air duct 1 can be set to 1800mm.

[0033] The steel wire frame 3 is different from the spiral iron clip wire frame in the prior art, which prevents the steel wire from wearing and fixing the fabric. The steel wire frame 3 provided in this solution is made of 5mm welded steel wire to form a closed loop frame, which prevents the steel wire from wearing and fixing the fabric, and ensures that the air duct 1 has a long-lasting strength. The material is 20 steel, and the interface is surface treated after welding.

[0034] Furthermore, the steel wire is wrapped with glass fiber cloth of the same type and then sewn to the wind tube, so it has good wear resistance and flame retardancy.

[0035] In a further solution, a suspension 4 is provided outside the wind tube.

[0036] The suspension 4 is evenly distributed on the outside of the air duct, and is covered with glass fiber cloth of the same type and then sewed to prevent the steel wire skeleton 3 from abrading the glass fiber cloth of the air duct 1.

[0037] The suspension 4 extends out of the air duct 1, and is equipped with a turnbuckle nut. The vertical suspension rope passes through it to suspend the frame air duct, and a limit pull ring is formed in the horizontal direction to prevent the adjacent hard objects from abrading the air duct. The suspension 4 is arranged in two rows about the axial direction of the air duct, and the two rows of the suspension 4 form a 90° angle corresponding to the circumferential direction.

[0038] The net height of the above-mentioned turnbuckle nut is 20mm. The vertical suspension rope passes through it to suspend the frame air duct, and a limit pull ring is formed in the horizontal direction to prevent the air duct from being worn by adjacent hard objects.

[0039] In a further solution, the glass fiber cloths at both ends of the air duct 1 are folded inwards and sewn to form a belt strip, and the sewing requirements are the same as those of the air duct.

[0040] In addition, throat clamp fixing straps 5 are circumferentially sewn on the outer circumference of the waist belt strip, and preferably 12 groups of throat clamp fixing straps 5 are provided. Both ends of the air duct 1 need to be fixed on the equipment with throat clamps.

[0041] The throat clamp fixing strap 5 is sewn with the same type of glass fiber cloth, and the sewing requirements at both ends refer to the air duct.

[0042] Example 2

[0043] The present invention also discloses a method for assembling a skeleton air duct 1 for an air-to-air cooler of a wind turbine generator, comprising the following steps:

[0044] Step 1: The air duct 1 is made of glass fiber cloth coated with silicon titanium glue, with metal wire in the middle to ensure the lasting strength of the air duct 1. The glass fiber cloth is cut obliquely to ensure that the suture seam 2 after suture rises spirally along the air duct 1, and the starting point and end point of the suture seam 2 are located on a vertical line to ensure that the air duct 1 is evenly stressed along the axis.

[0045] Step 2: Weld the closed-loop skeleton with steel wires, weld two suspension 4 bolts, cover with the same type of glass fiber cloth, and sew to prevent the steel wire skeleton 3 from abrading the glass fiber cloth of the air duct 1.

[0046] Step 3: The steel wire frame 3 supports the air duct 1 from the inside, and the air duct 1 is wrapped with fiberglass cloth and sewn with the steel wire frame 3.

[0047] Step 4: Suspension 4 extends out of the frame air duct 1 and installs the basket nut.

[0048] Step 5: Fold the fiberglass cloth at both ends of the air duct 1 inward and sew them, and sew the trip tape around the outside. The two ends of the air duct 1 need to be fixed to the equipment with hose clamps.

[0049] It should be noted that although the embodiments of the utility model have been shown and described, for ordinary technicians in this field, without departing from the inventive purpose of the utility model, structural methods and embodiments similar to the technical scheme without creative design should all fall within the scope of protection of the utility model.

Claims

1. A skeleton air duct for an air-to-air cooler of a wind turbine generator, comprising an air duct, characterized in that: The air duct is formed by glass fiber cloth coated with silicon titanium glue, and the glass fiber cloth is cut obliquely and sewn together, and the seams rise spirally along the air duct; a steel wire frame is arranged in the middle of the air duct to support the air duct from the inside; and a suspension is arranged outside the air duct.

2. The skeleton air duct for air-to-air cooler of wind turbine generator according to claim 1, characterized in that: The steel wire skeleton is made of 5mm welded steel wire to form a closed loop skeleton.

3. The skeleton air duct for the air-to-air cooler of a wind turbine generator according to claim 2, characterized in that: The suspension is evenly distributed about the outside of the wind tube and is connected to the steel wire frame.

4. The skeleton air duct for an air-to-air cooler of a wind turbine generator according to claim 3, characterized in that: The suspensions are arranged in two rows axially with respect to the wind tube, and the two rows of suspensions form an angle of 90° in the corresponding circumferential direction.

5. The skeleton air duct for the air-to-air cooler of a wind turbine generator according to claim 4, characterized in that: The suspension extends out of the air duct and is installed with a basket nut. The suspension in the vertical direction is used to suspend the air duct, and the suspension in the horizontal direction forms a limit pull ring to prevent the air duct from being worn by adjacent hard objects.

6. The skeleton air duct for an air-to-air cooler of a wind turbine generator according to claim 1, characterized in that: The starting point and the end point of the sutured seam are located on the same vertical line of the air duct, so as to ensure that the air duct is subjected to uniform force in the circumferential direction.

7. The skeleton air duct for an air-to-air cooler of a wind turbine generator according to claim 1, characterized in that: The thickness of the air cylinder is 0.4 mm.

8. The skeleton air duct for air-to-air cooler of wind turbine generator according to claim 1, characterized in that: The silicon-titanium gel coated glass fiber cloth has a mesh steel wire interlayer.

9. The skeleton air duct for an air-to-air cooler of a wind turbine generator according to claim 2, characterized in that: The steel wire is wrapped with glass fiber cloth coated with silicon titanium glue and then sewn with the wind tube; the glass fiber cloth is sewn with spiral seams using aramid sewing thread.

10. The skeleton air duct for an air-to-air cooler of a wind turbine generator according to claim 1, characterized in that: The outer ends of the air duct are folded inwards and sewn together to form a belt strip, and a throat clamp fixing strap is sewed circumferentially on the outer circumference of the belt strip.

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