High-wind-effect generator fan and machining method

Abstract

The high-wind-effect generator fan comprises a fan body of a hollow structure, the fan body comprises top faces and bottom faces which are equal in number and staggered in the circumferential direction, vertical faces are connected between the top faces and the adjacent bottom faces, and an air channel of a semi-closed structure is defined by the top faces and the two vertical faces connected with the top faces. Continuously bending the steel plate belt along the length direction of the steel plate belt according to the size of a claw pole of the generator to form an arch-shaped plate strip; cutting off openings or triangular openings on the bottom surfaces of the arc-shaped plate strips along the same side of the width direction of the steel disc belt; cutting off the arc-shaped plate strip according to the claw pole size of the generator, and sequentially bending the bottom surface of the arc-shaped plate strip along the opposite direction of the fracture or along the same direction of the triangular opening, so that the opening of the fracture is enlarged or the opening angle of the triangular opening is reduced; and the notch with the downward opening forms an air duct, so that the width of the air duct is larger than or equal to the width of the gap between two adjacent pole claws of the generator, and the generator fan is formed.

Description

Technical Field

[0001] The invention relates to the field of automobile generators, and in particular to a high wind-efficiency generator fan and a processing method thereof. Background Art

[0002] The function of the generator fan is to blow cold air through the stator winding in the automobile generator and take away the heat, thereby cooling the automobile generator when the automobile generator is working.

[0003] Traditional generator fans include hollow plates whose edges extend outward and are bent to form blades. Fans with this structure have low strength and are easily deformed and vibrate due to wind resistance during fan rotation, which in turn causes wind noise.

[0004] CN205901531U discloses a generator fan, including a disc, the edge of which extends outward to form horizontal blades, a plurality of horizontal blades are evenly distributed with the center of the disc as the center, and the edge of each horizontal blade extends outward perpendicular to the surface of the horizontal blade to form a vertical blade; the disc has a first reinforcing rib, which extends from the disc to the horizontal blade to form a second reinforcing rib, and the second reinforcing rib is away from one end of the disc to form a U-shaped reinforcing rib, and the U-shaped reinforcing rib extends to the vertical blade. Although the structural strength of this generator fan is enhanced by reinforcing ribs, the manufacturing process is complicated, and multiple stamping processes are required during processing, resulting in much waste of raw materials, high material costs and processing costs; and the generated air volume has poor radial restraint ability, most of which is lost in the axial direction, and the air volume acting on the generator stator winding in the radial direction is small, the heat dissipation effect is poor, and the motor temperature rise is high. Summary of the invention

[0005] The present invention aims to solve the above-mentioned technical problems and provides a high wind-efficiency generator fan and a processing method, which has a simple structure, low material cost and processing cost, and is convenient for continuous automated production; and increases the air volume acting on the generator stator winding in the radial direction, improves the wind efficiency, and can improve the heat dissipation effect of the generator.

[0006] The technical solution of the present invention is:

[0007] A high wind-efficiency generator fan comprises a fan body with a hollow structure. The fan body comprises equal number of top surfaces and bottom surfaces which are staggered circumferentially, a vertical surface is connected between the top surface and the adjacent bottom surface, and a semi-enclosed wind duct is formed between the top surface and the two vertical surfaces connected thereto.

[0008] Furthermore, the cross-sectional area of ​​the air duct gradually increases from the inside to the outside.

[0009] Furthermore, the cross-sectional area of ​​the air duct is equal inside and outside.

[0010] Furthermore, the fan body is made of steel coil.

[0011] The above-mentioned high wind efficiency generator fan processing method is adopted, and the steps are as follows:

[0012] Step 1: continuously bend the steel coil into a bow-shaped strip along its length according to the claw pole size of the generator;

[0013] Step 2: Cut the bottom surfaces of the arched slats into fractures or triangular openings along the same side of the width direction of the steel belt;

[0014] Step 3: Cut the arched slats according to the claw pole size of the generator, and bend the bottom surface of the arched slats in the opposite direction of the fracture or in the same direction of the triangular opening in sequence, so that the fracture opening becomes larger or the opening angle of the triangular opening becomes smaller;

[0015] Step 4: Butt and weld the bow-shaped slats end to end, and form an air duct with the downward-opening slots, so that the air duct width is ≥ the width of the gap between two adjacent pole claws of the generator, forming a generator fan.

[0016] Furthermore, the opening angle of the triangular opening is ≥360° / number of air ducts.

[0017] Furthermore, a semicircular notch is cut on the bottom surface of the arched lath at the other side of the fracture or the triangular opening, so that the stress is eliminated when the bottom surface of the arched lath is bent.

[0018] Furthermore, a circular notch is cut at the inner end of the fracture or triangular opening on the bottom surface of the arched lath so that stress is eliminated when the bottom surface of the arched lath is bent.

[0019] The beneficial effects of the present invention are:

[0020] 1. Since the fan body includes an equal number of top surfaces and bottom surfaces that are staggered circumferentially, and a vertical surface is connected between the top surface and the adjacent bottom surface, it has a simple structure, low material cost and processing cost, which is 75% lower than the material cost of traditional fans, and the material utilization rate can reach up to 98%, which is convenient for continuous automated production.

[0021] 2. By adjusting the size of the fracture or triangular opening, fans with different outer contours can be enclosed to meet the needs of generator fan products of multiple sizes.

[0022] 3. Due to the semi-closed structure of the air duct, the amount of air lost in the axial direction is reduced, and the amount of air acting on the stator winding of the generator in the radial direction is increased, which improves the wind efficiency, improves the heat dissipation effect of the generator, and indirectly reduces the amount of copper used in the stator winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0024] Figure 2is a structural diagram of Embodiment 2 of the present invention;

[0025] Figure 3 is a schematic diagram of the structure of step 1 in the second embodiment of the present invention;

[0026] Figure 4 is a structural diagram of step 2 in embodiment 2 of the present invention;

[0027] Figure 5 is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0028] Figure 6 is a schematic diagram of the structure of step 1 in embodiment 3 of the present invention;

[0029] Figure 7 It is a structural diagram of step 2 in embodiment 3 of the present invention;

[0030] In the figure: 1-top surface, 2-bottom surface, 3-vertical surface, 4-air duct, 5-fracture, 6-triangular opening, 7-semicircular notch, 8-circular notch. DETAILED DESCRIPTION

[0031] Embodiment 1:

[0032] like Figure 1 As shown, a high wind-efficiency generator fan includes a fan body with a hollow structure, the fan body is made of cold-rolled plate, the fan body includes six (or seven, eight or ten) top surfaces 1 and bottom surfaces 2 that are circumferentially staggered, a vertical surface 3 is connected between the top surface 1 and the adjacent bottom surface 2, a semi-enclosed structure of the wind duct 4 is formed between the top surface 1 and the two vertical surfaces 3 connected thereto, and the cross-sectional area of ​​the wind duct 4 is equal inside and outside.

[0033] During the processing operation, the cold-rolled plate is first punched into a sheet, and then six air ducts 4 are punched out of the punched sheet to form a generator fan whose outer contour is vertically projected as a circle.

[0034] Embodiment 2:

[0035] like Figure 2-4 As shown, a high wind-efficiency generator fan includes a fan body with a hollow structure, the fan body is made of a steel coil, the fan body includes six (or seven, eight or ten) top surfaces 1 and bottom surfaces 2 that are circumferentially staggered, a vertical surface 3 is connected between the top surface 1 and the adjacent bottom surface 2, a semi-enclosed air duct 4 is formed between the top surface 1 and the two vertical surfaces 3 connected thereto, and the cross-sectional area of ​​the air duct 4 gradually increases from the inside to the outside.

[0036] The above-mentioned high wind efficiency generator fan processing method is adopted, and the steps are as follows:

[0037] Step 1: continuously bend the steel belt along its length direction to form a bow-shaped strip according to the claw pole size of the motor;

[0038] Step 2: Make triangular openings 6 on the bottom surfaces 2 of the arched slats along the same side of the steel coil width direction, the opening angle of the triangular opening 6 is 60°, cut a semicircular notch 7 on the bottom surface 2 of the arched slat at the other side of the triangular opening 6, and cut a circular notch 8 on the bottom surface 2 of the arched slat at the inner end of the triangular opening 6;

[0039] Step 3: Cut the arched slats according to the claw pole size of the generator, and bend the bottom surface 2 of the arched slats in the same direction along the triangular opening 6 in sequence to reduce the opening angle of the triangular opening 6;

[0040] Step 4: Butt and weld the bow-shaped slats end to end, and form an air duct 4 with the groove opening downward, so that the width of the air duct 4 is ≥ the width of the gap between two adjacent pole claws of the generator, forming a generator fan.

[0041] The fan of the high wind-efficiency generator has a simple structure, reduces material costs by 75%, and has a material utilization rate of up to 98%. By adjusting the opening size and position, fans with different outer contours can be formed to meet the needs of various fan models and achieve continuous automated processing. The top surface 1 and the vertical surfaces 3 at both ends of the circumference form a semi-enclosed air duct 4, which reduces the amount of air lost in the axial direction and increases the amount of air acting on the stator winding of the generator in the radial direction:

[0042] Wind speed comparison table:

[0043]

[0044] Stator temperature comparison table

[0045]

[0046] Embodiment three:

[0047] like Figure 5-7 As shown, a high wind-efficiency generator fan includes a fan body with a hollow structure, the fan body is made of a steel coil, the fan body includes six (or seven, eight or ten) top surfaces 1 and bottom surfaces 2 that are circumferentially staggered, a vertical surface 3 is connected between the top surface 1 and the adjacent bottom surface 2, a semi-enclosed air duct 4 is formed between the top surface 1 and the two vertical surfaces 3 connected thereto, and the cross-sectional area of ​​the air duct 4 gradually increases from the inside to the outside.

[0048] The above-mentioned high wind efficiency generator fan processing method is adopted, and the steps are as follows:

[0049] Step 1: continuously bend the steel coil into a bow-shaped strip along its length according to the claw pole size of the generator;

[0050] Step 2: Cut the bottom surfaces 2 of the arched slats into fractures 5 on the same side of the steel coil width direction, cut the semicircular notch 7 on the other side of the fracture 5 on the bottom surface 2 of the arched slats, and cut the circular notch 8 on the inner end of the fracture 5 on the bottom surface 2 of the arched slats;

[0051] Step 3: Cut the arched slats according to the claw pole size of the generator, and bend the bottom surface 2 of the arched slats in the opposite direction of the fracture 5 in sequence to enlarge the fracture opening;

[0052] Step 4: Butt and weld the bow-shaped slats end to end, and form an air duct 4 with the groove opening downward, so that the width of the air duct 4 is ≥ the width of the gap between two adjacent pole claws of the generator, forming a generator fan.

[0053] The above are only specific embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high wind efficiency generator fan, comprising a fan body with a hollow structure, characterized in that: The fan body comprises equal number of top surfaces and bottom surfaces which are staggered in the circumferential direction, a vertical surface is connected between the top surface and the adjacent bottom surface, and a semi-enclosed air duct is formed between the top surface and the two vertical surfaces connected thereto.

2. The high wind efficiency generator fan according to claim 1 is characterized in that: The cross-sectional area of ​​the air duct gradually increases from the inside to the outside.

3. The high wind efficiency generator fan according to claim 1, characterized in that: The cross-sectional area of ​​the air duct is equal inside and outside.

4. The high wind efficiency generator fan according to claim 1 is characterized in that: The fan body is made of steel coil.

5. The method for processing a high wind efficiency generator fan according to claim 1, characterized in that: Step 1: continuously bend the steel coil into a bow-shaped strip along its length according to the claw pole size of the generator; Step 2: Cut the bottom surfaces of the arched slats into fractures or triangular openings along the same side of the width direction of the steel belt; Step 3: Cut the arched slats according to the claw pole size of the generator, and bend the bottom surface of the arched slats in the opposite direction of the fracture or in the same direction of the triangular opening in sequence, so that the fracture opening becomes larger or the opening angle of the triangular opening becomes smaller; Step 4: Butt and weld the bow-shaped slats end to end, and form an air duct with the downward-opening slots, so that the air duct width is ≥ the width of the gap between two adjacent pole claws of the generator, forming a generator fan.

6. The method for processing a high wind efficiency generator fan according to claim 5, characterized in that: The opening angle of the triangular opening is ≥360° / number of air ducts.

7. The method for processing a high wind efficiency generator fan according to claim 5, characterized in that: Place the bottom surface of the bow-shaped lath on the other side of the fracture or triangular opening and cut a semicircular notch.

8. The method for processing a high wind-efficiency generator fan according to claim 5, characterized in that: Cut a circular notch with the bottom surface of the bow-shaped lath located at the inner end of the fracture or triangular opening.

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