New energy flat wire motor paint dipping rotary curing tool and method

Abstract

The invention discloses a new energy flat wire motor paint dipping rotation curing tool and method, and the tool comprises a stator iron core, the periphery of the stator iron core is sleeved with stator fixing rings, a pull rod screw is arranged between the two stator fixing rings, and the bottom of each stator fixing ring is provided with a plurality of groups of transmission rollers. The conveying rollers comprise a driving roller and a driven roller, and the multiple sets of conveying rollers are connected with a driving motor. By changing the paint dipping and curing production mode, the influence of gravity in one direction on the insulating paint is eliminated in the paint dipping and curing process of the motor stator, the insulating paint can be prevented from losing, that is, it is guaranteed that the insulating paint can be uniformly cured into a groove of a motor stator iron core, and after the rotary curing tool is additionally arranged, the production efficiency is greatly improved. The filling amount of the insulating paint in the stator slot of the motor reaches more than 85% of a design value, so that the insulation effect of the motor is ensured, the service life of the motor is prolonged, and the production efficiency can also be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of flat wire motors, and particularly relates to an impregnating and rotating curing tooling and method for a new energy flat wire motor. Background Technique

[0002] The production process of the stator of a new energy flat wire motor mainly includes: hairpin forming, wire insertion and twisting, end welding, coating and impregnation, impregnation curing, etc. The insulation performance of the motor directly determines the service life of the motor. During the production process of the motor stator, impregnation curing is often strongly related to the insulation performance. In previous production, after the motor stator was impregnated, it was directly placed vertically on a curing tooling rack in an oven for curing heating. There are also manufacturers that place it horizontally in the oven for curing heating. The insulation paint filling rate of these two impregnation curing methods is generally about 60% - 70%, and it cannot reach more than 85% of the design value.

[0003] Most of the impregnating varnishes used in current enterprise production for motor stators are a kind of liquid polyesterimide resin, and its viscosity is generally between 900 - 2600 mpa.s. If production operations are carried out according to the mode of placing on a curing tooling rack, due to the influence of gravity, the insulation paint will fall along the axial direction of the motor. Along with the increase in the oven temperature, very little of the insulation paint will adhere and cure at the twisted wire end, while more insulation paint will adhere and cure at the wire insertion end compared to the twisted wire end. The products produced in this way have the following problems: 1. The insulation performance is not balanced; 2. The insulation paint at the twisted wire end has all flowed away, and it is impossible to cure the insulation paint (i.e., it cannot hold the paint), and there is a large difference from the initial designed paint hanging amount (i.e., the filling amount of the insulation paint). Therefore, the insulation performance of the motor stator cannot be fully guaranteed.

[0004] If production operations are carried out according to the mode of placing in the oven for curing heating, due to the influence of gravity, the paint will slide along the inner side of the stator core along the diameter direction of the motor (or fall in the direction of gravity in the stator core slot). Along with the increase in the oven temperature, very little of the insulation paint that can adhere and cure will be at the upper end of the motor stator, while more insulation paint will adhere and cure at the lower end compared to the upper end. The products produced in this way have the following problems: 1. The insulation performance is not balanced; 2. The insulation paint at the upper end has all flowed away, and it is impossible to cure the insulation paint (i.e., it cannot hold the paint), and there is a large difference from the initial designed paint hanging amount (i.e., the filling amount of the insulation paint). Therefore, the insulation performance of the motor stator cannot be fully guaranteed. Summary of the Invention

[0005] The main purpose of the present invention is to provide an impregnating and rotating curing tooling and method for a new energy flat wire motor, which solves the problems that when the existing motor stator is impregnated and cured, the insulation performance is not balanced, there is a large difference from the initial designed paint hanging amount, and the insulation performance cannot be fully guaranteed.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: A dip painting and rotary solidification tooling and method for a new energy flat wire motor, including a stator core, a stator fixing ring is sleeved outside the stator core, a pull rod screw is arranged between the two stator fixing rings, and multiple groups of transmission rollers are arranged at the bottom of the stator fixing ring. The transmission rollers include a driving roller and a driven roller, and the multiple groups of transmission rollers are connected to a driving motor.

[0007] Further, multiple groups of the transmission rollers are connected in series by a chain.

[0008] Further, positioning blocking rings are designed on the driving roller and the driven roller.

[0009] Compared with the prior art, the present invention has the following beneficial effects: By changing the dip painting and solidification production method, during the dip painting and solidification process of the motor stator, the influence of gravity in one direction on the insulating paint is eliminated, and the loss of the insulating paint can be prevented, that is, it is ensured that the insulating paint can be evenly solidified into the slots of the motor stator core. After adding the rotary solidification tooling, the filling amount of the insulating paint in the slots of the motor stator reaches more than 85% of the design value, ensuring the insulation effect of the motor, extending the service life of the motor, and improving the production efficiency. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the overall structure of a dip painting and rotary solidification tooling for a new energy flat wire motor of the present invention;

[0011] Figure 2 It is a schematic diagram of the structure of the stator fixing ring of a dip painting and rotary solidification tooling for a new energy flat wire motor of the present invention;

[0012] Figure 3 It is a schematic diagram of the dip painting state in the slot of a single stator core of a dip painting and rotary solidification tooling for a new energy flat wire motor of the present invention.

[0013] In the figure: 1. Stator core; 2. Driving roller; 3. Driven roller; 4. Positioning blocking ring; 5. Stator fixing ring; 6. Pull rod screw; 7. Insulating paper; 8. Flat copper wire; 9. Insulating paint. Detailed Embodiments

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0015] See Figure 1, the present invention discloses a dip painting and rotary solidification tooling for a new energy flat wire motor, including a stator core 1, and a stator fixing ring 5 is sleeved outside the stator core 1. Specifically, refer to Figure 2 , in this embodiment, two stator fixing rings 5 are sleeved outside the stator core 1, and a tie rod screw 6 is arranged between the two stator fixing rings 5. By setting the tie rod screw 6, the stator fixing ring 5 can be fixed to prevent the stator fixing ring 5 from loosening. Further, multiple groups of transmission rollers are arranged at the bottom of the stator fixing ring 5. The transmission rollers include a driving roller 2 and a driven roller 3. Further, multiple groups of transmission rollers are connected in series by a chain. Further, multiple groups of transmission rollers are connected to a driving motor, so that the entire tooling can rotate together with the driving roller 2. As Figure 3 shown, it is a schematic diagram of the dip painting state in the slot of a single stator core 1. 7 represents insulating paper, 8 represents flat copper wire, and 9 represents insulating paint. As the temperature of the stator in the stator dip painting and curing baking equipment increases, the insulating paint 9 will gradually solidify from the outside to the inside and fill the stator core slot. The insulating paint 9 will not fall or slip due to the gravity in one direction. The insulating paint 9 will only rotate in the slot as the motor stator rotates, and will eventually solidify as the stator temperature increases and adhere to the surface of the flat copper wire 8 and in the stator slot. The filling amount of the insulating paint of the stator core produced by this rotary dip painting and solidification method can meet the requirement of 85% of the design value.

[0016] Further, positioning blocking rings 4 are designed on the driving roller 2 and the driven roller 3, which can prevent the motor stator from running off during rotation.

[0017] The implementation principle of the present invention: During the dip painting and curing process of the motor stator, the influence of the gravity in one direction on the insulating paint is eliminated, which can prevent the insulating paint 9 from flowing away, that is, ensure that the insulating paint 9 can be evenly solidified into the slots of the motor stator core 1. In order to eliminate the gravity in one direction, the stator is rotated during the dip painting and curing process of the motor. The rotation speed of the stator is strongly related to the dip painting and curing temperature, that is, the insulating paint moves towards the stator tooth grooves through centrifugal force.

[0018] According to the centrifugal force formula F = mω2r, taking a certain product A (72 slots) as an example, through calculation, the volume of insulating paint that can be filled in each slot is 1922.284 mm 3 , and its density is roughly between 0.82 and 1.3 grams per cubic centimeter, that is, the mass of insulating paint required for a single slot m = volume * density = 1.922 cm 3 *0.82 g / cm 3= 1.58 g, and 1.58 g of impregnating varnish can be impregnated in a single slot. F = mω2r = 1.58×10-3 Kg×ω2×15×10-2 m ≥ 1.58×10-3 Kg×9.8 N / Kg, ω2 ≥ 65.4, ω ≥ 8.1 rad / s, ω = 2Πn, n = ω / 2Π = 1.3 r / s. Therefore, when the rotation speed during the impregnating varnish curing process is greater than 1.3 r / s, it can ensure that the insulating varnish adheres to the stator slot.

[0019] By changing the impregnating varnish curing production method and adding a rotary curing tooling, the filling amount of the insulating varnish in the motor stator slot of the present invention reaches more than 85% of the design value, ensuring the insulation effect of the motor, extending the service life of the motor, and improving the production efficiency.

[0020] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0021] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new energy flat wire motor paint dipping and rotary curing tool and method, characterized in that: The invention comprises a stator core (1), wherein a stator fixing ring (5) is sleeved on the outer periphery of the stator core (1), a tie rod screw (6) is arranged between two stator fixing rings (5), and a plurality of groups of transmission rollers are arranged at the bottom of the stator fixing ring (5), wherein the transmission rollers comprise a driving roller (2) and a driven roller (3), and the plurality of groups of transmission rollers are connected to a driving motor.

2. A new energy flat wire motor paint dipping and rotating curing tool and method according to claim 1, characterized in that: A plurality of groups of transmission rollers are connected in series via chains.

3. A new energy flat wire motor paint dipping and rotary curing tool and method according to claim 1, characterized in that: The active roller (2) and the driven roller (3) are provided with positioning and blocking rings (4).

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