KR100969119B1 - Coating apparatus for stator of alternator - Google Patents

Abstract

The present invention can drastically shorten drying time and improve productivity by spray-coating the stator with a small particle of the insulating liquid so that the insulating liquid does not enter the inside, and can reduce productivity by rotating the holder supporting the stator. The coating is also possible with a spray nozzle of the purpose to provide an alternator stator coating apparatus to improve the coating efficiency.

To this end, the present invention is a cradle for supporting the stator in the vertical direction; Watertight means installed in the upper end and the lower end of the holder so that the insulating liquid does not flow into the inner surface of the stator; An injection nozzle for injecting an insulating liquid onto the stator mounted by the holder; And an insulating liquid supply device connected to the injection nozzle and supplying an insulating liquid, wherein the insulating liquid injected through the injection nozzle is coated on the stator except for the inner surface of the stator by a watertight means. It provides a stator coating apparatus.

Insulating solution, stator, holder, spray

Description

Alternator stator coating device {Coating apparatus for stator of alternator}

The present invention relates to a stator coating apparatus of an alternator, and more particularly, to a stator coating apparatus of an alternator which is water-tightly treated so that the insulating liquid does not enter while spray coating the stator with an insulating liquid of small particles.

In general, the alternator is mounted outside the engine to convert the mechanical energy of the engine into electrical energy. The alternator is composed of a stator, a rotor, a regulator, a rectifier, and the like, and other brackets, pulleys, etc. form an appearance.

The alternator receives power from the engine belt. The rotor, which receives the rotational force of the pulley, rotates inside the stator and produces electricity by electromagnetic induction. The electricity generated is stored in a battery and supplied to various electric parts in the vehicle, and may supply driving energy to the starter at the first start-up.

However, when the alternator fails, power generation does not occur, resulting in various problems. Therefore, when the alternator breaks down, the alternator must be replaced with a new one, but a remanufactured product that is not new is widely used due to problems such as the age of the vehicle and the part price.

As a result, domestic and overseas remanufacturing markets are widely formed, and the distribution of remanufactured products is also active.

The most expensive component of the alternator is the stator. If the stator is replaced with a new one during remanufacturing, there is no economic feasibility due to rising production cost. Therefore, the stator is inevitable to recycle, and this requires a processing process for improving the performance of the stator.

On the other hand, the main types of failure of the stator include poor insulation, shorts, and disconnections, which are virtually all caused by peeling off of the stator's insulating coating.

However, when the stator is produced for the first time, an insulating material coated on the outside of the stator coil is cured over time, thereby causing a kind of peeling phenomenon.

Therefore, to improve the performance of the remanufacturing alternator, recoating of the stator is necessary. The recoating operation generally includes a deepening process in which a stator is immersed in a liquid insulating liquid and then taken out.

The impregnation process does not require a complicated device, the speed of work is fast, and has the advantage that mass production is possible by impregnating several stators at the same time.

However, since the stator is immersed in a liquid insulating liquid for a short time, the coating is less efficient. This is because the particles of the coating liquid in the liquid state are large, so that the surface adhesion is not good, and even when attached, the coating density is low due to the interparticle pores or bubbles.

In addition, because the coating particles are large, it takes a long time to dry. It takes at least 4 to 5 hours from room temperature to complete drying after the impregnation process, and also requires a large space to dry the stator.

In particular, if the stator is left alone, a non-uniform coating occurs, in which the liquid coating liquid flows downward and the coating of the lower portion becomes thicker. Therefore, since the stator must be periodically returned during drying, additional equipment or manpower input for this is inevitable.

In order to solve such a problem, there is a high temperature drying method of drying by raising the temperature in a high temperature chamber. This method has a faster drying speed than the room temperature drying method, but has a large additional cost and limits workability according to the chamber capacity.

That is, the impregnation method is not high productivity because it takes a short time for the impregnation itself, but requires a lot of time, space, and equipment for drying. In addition, it is difficult to expect high insulation efficiency due to the high possibility of voids and bubbles due to the size of the liquid particles.

The present invention has been made in view of the above, by spray-coating the stator with a small particle of the insulating liquid while water-tight treatment so that the insulating liquid does not enter the inside can significantly shorten the drying time and improve productivity It is an object of the present invention to provide a stator coating apparatus for an alternator, which can improve coating efficiency since the coating can be performed with a small number of spray nozzles by rotating a holder supporting the stator.

In the present invention for achieving the above object in the stator coating apparatus of the alternator,

Cradle for supporting the stator in the vertical direction;

Watertight means installed in the upper end and the lower end of the holder so that the insulating liquid does not flow into the inner surface of the stator;

An injection nozzle for injecting an insulating liquid onto the stator mounted by the holder; And

And an insulating liquid supply device connected to the injection nozzle to supply the insulating liquid, wherein the insulating liquid injected through the injection nozzle is coated on the stator except for the inner surface of the stator by a watertight means.

In a preferred embodiment, the lower end of the cradle is characterized in that it further comprises a vertical column installed in a structure rotatably supported.

In a more preferred embodiment, the stator is composed of a central support portion protruding in the center and the coil portion formed in the upward and downward directions from the central support portion, and the watertight means has an insulating liquid from the inner surface of the coil portion to the central support portion. The upper disc is detachably installed at the upper end of the cradle so as not to be introduced, and the lower disc is fixedly installed at the lower end of the cradle, and the central support part is mounted and supported on the upper part of the lower disc.

In addition, the injection nozzle is characterized in that at least two or more installed on the top and bottom of the stator.

In addition, the watertight means is a metal material, characterized in that the water-tight material is coated on the metal plate.

In addition, the outside of the injection nozzle is characterized in that the working chamber is installed so as not to splash to the outside during the injection of the insulating liquid.

In addition, the insulating solution is characterized in that the solvent-free insulating agent mainly containing a heat-resistant unsaturated polyester resin.

Accordingly, according to the stator coating apparatus of the alternator according to the present invention, the apparatus for coating the insulating liquid has a complex disadvantage compared to the conventional impregnation method, but the coating is very small by coating the insulating liquid by spraying, the distribution of the insulating liquid is Evenly it is possible to greatly reduce the drying time, and by mounting the stator to the holder to rotate, it is possible to coat with a small number of injection nozzles can improve the coating efficiency and productivity.

In addition, by blocking the inflow of the insulating liquid by the watertight disc, the stator is selectively coated except for the rotor and the inner surface of the stator in which the electromagnetic induction, the removal of the coating material by the conventional impregnation method is not necessary, No drying process is required after drying.

Therefore, when considering the entire process it can be seen that the spray coating method according to the present invention is much more economical, it is relatively superior in coating quality.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a block diagram illustrating a stator coating apparatus of an alternator according to an embodiment of the present invention, and FIG. 4 is a process diagram showing a stator coating method of an alternator according to an embodiment of the present invention.

The impregnation method, which is used as a recoating method for a conventional stator, requires an introduction of a spraying process, rather than an impregnation method, to improve the point that it takes a long time to dry the insulating liquid and requires a large space and expensive equipment.

Since the spray method sprays the coated particles through the nozzle 10, the particle size is small and the possibility of voids and bubbles can be minimized. In addition, since the coating liquid does not flow down, it is not necessary to change the position of the stator 11 during drying, and even when dried at room temperature, time is significantly reduced and workability is high.

Therefore, the spraying process is a superior method considering the overall working time and the coating efficiency.

However, it should be noted that the coating liquid should not be buried inside the stator 11. This is because the rotor rotates inside the stator 11 and power generation occurs due to the electromagnetic induction phenomenon of the stator 11 and the rotor. Therefore, if the insulating liquid gets on the inside of the stator 11, the power generation performance is rather deteriorated.

In addition, the conventional impregnation method is impossible to sort coating, so once the entire impregnation, the inside of the stator must be reaming (reaming) to squeeze out the impregnation liquid, so the additional process burden is not small.

Therefore, a general simple spray device cannot be used, and a development of a dedicated device for stator coating is required.

The present invention includes a holder 12 for mounting the stator 11, an injection nozzle 10 for injecting the insulating liquid, and watertight means for preventing the insulating liquid from entering the inside of the stator 11.

In addition, the material of the insulating liquid coated on the stator 11 may vary depending on the insulating property. Generally considered is a solvent-free insulation containing a heat-resistant unsaturated polyester resin as a main component, which is suitable for automotive component coils because of excellent insulation, heat resistance, adhesiveness and chemical resistance.

Representative examples include product names MV428-W325, MV428-W316, etc., and about 1% of the curing agent is mixed during application.

The holder 12 is installed in a structure that supports the cylindrical stator 11 to be rotated 360 degrees, which allows to be uniformly coated with a small number of injection nozzles (10). That is, the lower end of the holder 12 is rotatably supported by a bearing on the upper end of the vertical column 13 installed vertically.

Watertight means is attached to the top and bottom of the holder 12 to mount the stator 11 and prevent the insulating liquid from entering the stator 11.

The stator 11 is composed of a central support portion 11a having a large thickness and a diameter, and a coil portion 11b formed above and below the central support portion 11a, and the central support portion 11a is a coil portion 11b. It protrudes more than its outer and inner surfaces.

At this time, the site where the insulating liquid is coated on the stator 11 is an outer surface of the stator 11 and an inner surface of the coil part 11b of the stator 11. The part excluded from the coating is the inner surface of the central support portion 11a of the stator 11.

Therefore, the portion where the watertight means is installed is located at the interface between the central support portion 11a and the coil portion 11b of the stator 11 and blocks the central support portion 11a located between the coil portion 11b from the insulating liquid. It is the purpose of watertight means.

Watertight means according to an embodiment of the present invention is structurally installed in the upper and lower portions of the holder 12 in the form of a disc, the disc (14, 15) is to block the top and bottom of the central support (11a). Here, the lower disc 15 is fixed to the lower portion of the cradle 12, the upper circular plate 14 is detachably installed on the upper portion of the cradle 12.

Because the central support portion 11a protrudes inward from the inner surface of the stator 11, the discs 14 and 15 are mounted on the holder to prevent the insulating liquid from flowing from the coil portion 11b to the central support portion 11a. The diameter should be larger than that of 12, and in order for the stator 11 to be mounted on the holder 12, the lower end of the central support part 11a should be mounted with the lower disc 15 fixed to the bottom of the holder 12. In order to assemble with the holder 12 penetrating the inside of the central support 11a, the upper disc 14 should be separated from the holder 12, and the central support 11a is mounted on the holder 12, and then This is because the upper disc 14 must be detachably coupled to the upper end of the cradle 12 in order to block the interface between the central support part 11a and the coil part 11b.

The material of the discs 14 and 15 may have a form in which a watertight material is coated on a general metal material, and there may be various kinds of coating materials depending on the degree of watertightness, and Teflon may be widely used. .

The cradle 12 and the watertight discs 14 and 15 are made of different sizes and are replaceable when necessary. This is because the diameter of the stator 11 varies slightly depending on the capacity of the alternator.

Since the capacity of the alternator currently in circulation is about 5 types, the holder and the watertight discs 14 and 15 should be manufactured and equipped with at least 5 types accordingly.

On the other hand, there are two ways to mount the stator (11) to the cradle 12, the pressure of the cradle (12) itself protrudes and supports, and the stator 11 is naturally supported across the lower disc 15 to support There is a deferment.

Although the pressure type can be more surely mounted, there is a disadvantage that is relatively expensive. Therefore, in the actual work, the latter method is not too large and advantageous in terms of cost, and the preferred embodiment of the present invention adopts the stationary type.

The injection nozzle 10 can be installed in at least two or more, the more the number of the injection nozzle 10, the equipment price increases but the work speed is increased, it can be flexibly adjusted to the production or scale of the company. The diameter of the nozzle 10 can also be changed fluidly according to the type of insulating liquid.

In addition, the working chamber 16 is installed outside the injection nozzle 10 serves to prevent the insulating liquid from splashing out when the insulating liquid is injected.

The cradle 12 is provided on the main body 18 provided with an LCD panel 17 and a control button on the outside to check the progress of operation and work.

Referring to the operation and effects of the stator coating apparatus of the alternator according to an embodiment of the present invention by such a configuration as follows.

In the case of the conventional impregnation method, the process of impregnating the stator in the insulating liquid coating method has a very simple advantage, but the particle size of the insulating liquid has a large drying time and has a disadvantage of low coating efficiency. In addition, because the characteristics of the stator coating should not be coated on the inner surface of the stator (11) in which the rotor and the electromagnetic induction, the impregnation method that cannot be selectively coated should remove the coating material coated on the inner surface of the stator (11). There was a hassle.

However, the present invention has a disadvantage in that the apparatus for coating the insulating liquid is more complicated than the conventional impregnation method, but by coating the insulating liquid by spraying, the coating particles are very small and the distribution of the insulating liquid is uniform, thereby greatly reducing the drying time. By mounting the stator 11 to the holder 12 rotating, the coating can be performed even with a small number of injection nozzles 10, thereby improving coating efficiency and productivity.

In addition, by blocking the inflow of the insulating liquid by the watertight discs 14 and 15, the stator 11 is selectively coated except for the inner surface of the stator 11 where the rotor and the electromagnetic induction are formed, and a conventional impregnation method. Since the removal of the coating material by the separate process is not necessary, no process is required after drying.

Therefore, when considering the entire process it can be seen that the spray coating method according to the present invention is much more economical, it is relatively superior in coating quality.

General impregnation process takes about 4-6 hours at room temperature drying, heat drying using a high temperature chamber takes about 30 minutes to 1 hour at 120 ~ 140 ℃, there is a problem that the drying capacity of the chamber is limited .

On the other hand, when drying by the spray coating operation according to the present invention takes about 10 to 20 minutes at room temperature. In addition, when drying in a well-ventilated place it is possible to dry more quickly has the advantage that does not have to dry in a high-temperature chamber.

While the invention has been shown and described with respect to certain preferred embodiments, the invention is not limited to these embodiments, and those of ordinary skill in the art claim the invention as claimed in the claims It includes all the various forms of embodiments that can be carried out without departing from the spirit.

1 is a perspective view showing a stator,

2 is a plan view and a side cross-sectional view of FIG.

Figure 3 is a block diagram showing a stator coating apparatus of the alternator according to an embodiment of the present invention,

Figure 4 is a process chart showing a stator coating method of the alternator according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: injection nozzle 11: stator

11a: center support portion 11b: coil portion

12: holder 13: vertical column

14: upper disk 15: lower disk

16: working chamber 17: LCD panel

18: main body

Claims (7)

In the stator coating apparatus of the alternator, Cradle for supporting the stator in the vertical direction; Watertight means installed in the upper end and the lower end of the holder so that the insulating liquid does not flow into the inner surface of the stator; An injection nozzle for injecting an insulating liquid onto the stator mounted by the holder; And And an insulating liquid supply device connected to the injection nozzle to supply the insulating liquid, wherein the insulating liquid injected through the injection nozzle is coated on the stator while preventing the insulating liquid injected into the stator by the watertight means. Alternator stator coating device. The method according to claim 1, The stator coating apparatus of the alternator further comprises a vertical column installed in a structure in which the lower end of the holder is rotatably supported. The method according to claim 2, The stator includes a central support portion protruding from the center and a coil portion formed upward and downward from the central support portion, and the watertight means has an upper end portion of the cradle so that the insulating liquid does not flow from the inner surface of the nose to the central support portion. The upper disc is detachably installed, the lower disc is fixed to the lower end of the mount, the stator coating apparatus of the alternator, characterized in that the central support is mounted and supported on top of the lower disc. The method according to claim 3, The spray nozzle is a stator coating apparatus of the alternator, characterized in that at least two or more are installed on the stator. The method according to claim 4, The watertight means is a metal material, the stator coating apparatus of the alternator, characterized in that the water-tight material is coated on the metal plate. The method according to claim 5, The stator coating apparatus of the alternator, characterized in that the working chamber is installed on the outside of the injection nozzle so as not to splash to the outside when the insulating liquid is injected. The method according to any one of claims 1 to 6, The insulating liquid is a stator coating apparatus of the alternator, characterized in that the solvent-free insulating agent containing a heat-resistant unsaturated polyester resin.

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