CN102611261A - Method for applying high-temperature-resistant resin paint on motor rotor - Google Patents

Abstract

The invention discloses a method for coating the surface of a motor rotor with a high-temperature-resistant resin paint. The high-temperature-resistant resin paint is a silicone resin paint; the specific coating steps include cleaning, preheating, dipping, vacuuming, drying, and cleaning in sequence. and curing; wherein, the step of dipping paint is to put the heated motor rotor into the dipping tank, and then inject into the tank a high temperature resistant silicone resin paint with a temperature of 55~60°C; the vacuuming step , is to vacuumize the dipping tank equipped with the motor rotor and silicone resin paint until the internal pressure of the dipping tank reaches below 200Pa and maintains it for at least 10 minutes; the drying step is to inject dry gas into the dipping tank; the curing The step is to cure the silicone resin paint on the surface of the motor rotor in an oven. The invention has the advantages of advanced and reasonable technology, good paint quality on the surface of the rotor, and the like.

Description

A method for coating the surface of a motor rotor with high temperature resistant resin paint

technical field

The invention relates to a method for treating the surface of a motor rotor, in particular to a method for coating the surface of a motor rotor with a high-temperature-resistant resin paint.

Background technique

When the existing motor is running at rated power or overload, the surface temperature of the motor rotor may reach about 300°C. Due to the poor high temperature resistance of the ordinary paint coated on the surface of the existing motor rotor, after a period of use of the motor rotor, its Ordinary paint coated on the surface will peel off in a large area; and the surface coating of the existing motor rotors generally adopts a spraying process, which is difficult to achieve a uniform thickness of the paint layer, and even some dead corners may not be sprayed with paint at all, so It will cause the rotor of the motor to rust, which directly affects the heat dissipation performance of the rotor of the motor, and at the same time there is a certain potential safety hazard.

Contents of the invention

The purpose of the present invention is to provide a method for coating a high temperature resistant resin paint on a motor rotor that can effectively prevent the surface of the motor rotor from rusting.

In order to achieve the above object, the technical solution of the present invention is: a method for coating the surface of a motor rotor with a high temperature resistant resin paint, the high temperature resistant resin paint is a silicone resin paint; the innovation point is that the specific coating steps include: Cleaning, preheating, dipping, vacuuming, drying, cleaning and curing; which:

a. The cleaning step is to clean and wipe the surface of the motor rotor;

b. The preheating step is to put the motor rotor cleaned in step a into an oven for heating, the heating temperature is controlled within the range of 90-110°C, and the heating time is controlled within the range of 1-3 hours;

c. The paint dipping step is to put the motor rotor heated in step b into the dipping tank, and then inject high temperature resistant silicone resin paint with a temperature of 55~60°C into the tank until the paint surface in the dipping tank Stop injecting when it exceeds the rotor short-circuit ring by 50mm;

d. The vacuuming step is to vacuumize the impregnation tank equipped with the motor rotor and silicone resin paint through step c until the internal pressure of the impregnation tank reaches below 200 Pa and maintains it for at least 10 minutes; if the height of the paint surface in the tank When it is lower than 50mm above the rotor short-circuit ring, add silicone resin paint to the dipping tank until the paint surface is 50mm higher than the rotor short-circuit ring;

e. The drying step is to inject dry gas into the impregnation tank of step d until the internal pressure of the impregnation tank reaches ≥0.4MPa, and the maintenance time is controlled within the range of 18 to 30 minutes, then the impregnation tank is opened, and the impregnation tank is After the pressure reaches normal pressure, take out the motor rotor;

f. The cleaning step is to wipe off the excess silicone resin paint on the motor rotor dried in step e;

g. The curing step is to put the motor rotor cleaned in step f into an oven with a temperature in the range of 180-190° C., and cure the silicone resin paint on the surface of the motor rotor. The total curing time is controlled at 11.5 ~12.5 hours range.

In the above technical solution, in the curing step, the motor rotor is arranged on the tooling and rotated at a speed of 10-20 rpm for curing, and the curing time is controlled within one-third of the total curing time. The motor rotor remains stationary for the remainder of the curing time.

In the above technical solution, the temperature distribution error in the oven used in the preheating and curing steps is controlled within 5°C, and the temperature rise rate in the oven is controlled within the range of 70-120°C/h.

The positive effects of the present invention are: due to the method of dipping and painting, the surface of the motor rotor is coated with high-temperature resistant resin paint, so that the surface of the small gaps between the motor rotor laminations is also coated with high-temperature resistant resin paint with strong adhesion. Resin paint, the method of the present invention can make the surface of the motor rotor form a continuous and smooth paint film, and can ensure that the paint film on the surface of the motor rotor has a uniform thickness, no dead angle, and the paint film is not easy to fall off, which can not only improve the high temperature resistance of the motor rotor surface And anti-rust effect, but also improve the insulation of the motor rotor, and the moisture resistance of the motor rotor, therefore, the present invention has the characteristics of advanced and reasonable technology, good quality of paint on the surface of the motor rotor and the like.

Description of drawings

Fig. 1 is a process flow diagram of a specific embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and given embodiments, but is not limited thereto.

As shown in Figure 1, a method for coating the surface of a motor rotor with a high-temperature-resistant resin paint, the high-temperature-resistant resin paint is a silicone resin paint; and its specific coating steps include cleaning, preheating, dipping, and vacuuming. , dried, cleaned and cured; and which:

a. The cleaning step is to clean and wipe the surface of the motor rotor with an industrial cleaning agent to ensure that there is no oil, rust and dust on the surface of the motor rotor;

b. The preheating step is to put the motor rotor cleaned in step a into an oven for heating, the heating temperature is controlled within the range of 90-110°C, and the heating time is controlled within the range of 1-3 hours;

c. The paint dipping step is to put the motor rotor heated in step b into the dipping tank, and then inject high temperature resistant silicone resin paint with a temperature of 55~60°C into the tank until the paint surface in the dipping tank Stop injecting when it exceeds the short-circuit ring of the rotor by 50mm; if multiple motor rotors are to be impregnated at the same time, they need to be placed neatly, that is, the motor rotors are placed at the same height in the impregnation tank to prevent damage to the motor rotors;

d. The vacuuming step is to vacuumize the impregnation tank equipped with the motor rotor and silicone resin paint through step c until the internal pressure of the impregnation tank reaches below 200 Pa and maintains it for at least 10 minutes; if the height of the paint surface in the tank When it is lower than 50mm above the rotor short-circuit ring, add silicone resin paint to the dipping tank until the paint surface is 50mm higher than the rotor short-circuit ring;

e. The drying step is to inject dry gas (air) into the impregnation tank of step d until the internal pressure of the impregnation tank reaches ≥0.4MPa, and the maintenance time is controlled within the range of 18 to 30 minutes, and then the impregnation tank is opened and waited for After the internal pressure of the dipping tank reaches normal pressure, take out the motor rotor;

f. The cleaning step is to use a soft cloth to wipe off the excess silicone resin paint on the motor rotor dried in step e;

g. The curing step is to put the motor rotor cleaned by step f into an oven with a temperature in the range of 180-190° C., and cure the silicone resin paint on the surface of the motor rotor. The total curing time is controlled at 11.5-190 ° C. 12.5 hours range.

In order to improve the curing efficiency, in the curing step, the motor rotor is arranged on the tooling and rotated at a speed of 10-20 rpm for curing. The curing time is controlled within one-third of the total curing time. The motor rotor remains stationary for the remainder of the curing time.

In order to ensure good preheating and curing effects of the motor rotor, the temperature distribution error in the oven used in the preheating and curing steps is controlled within 5°C, and the temperature rise rate in the oven is controlled within the range of 70-120°C/h.

The organosilicon resin paint of the present invention is a commercially available product, and the preferred model is H62C.

The results of the small test of the present invention show that the present invention can be used to spray ordinary paint on the motor rotor, has better adhesion, the motor rotor has good high temperature resistance, and can effectively prevent the paint layer on the surface of the motor rotor from falling off and rusting.

Claims (3)

1. the method for rotor surface coated fire resistant resin lacquer, said fire resistant resin lacquer is an organic silicon resin paint; It is characterized in that: its concrete application step comprises cleaning successively, preheats, dipping lacquer, vacuumize, dry, cleaning and solidifying; And its:

A, said cleanup step are the rotor surface to be cleaned clean;

B, the said step that preheats are the rotor after step a cleaning to be put into baking oven heat, and heating and temperature control is controlled in 1 ~ 3 hour scope in 90 ~ 110 ℃ of scopes heating time;

C, said dipping lacquer step are with the rotor after step b heating, put into impregnation tank, and implantation temperature is 55 ~ 60 ℃ a high-temperature resistant organic silicon resin lacquer in jar then, stops to inject when lacquer painting surpasses rotor short-circuit ring 50mm in impregnation tank;

D, the said step that vacuumizes are that the impregnation tank that rotor and organic silicon resin paint are housed through step c is vacuumized, and pressure reaches below the 200Pa and kept at least 10 minutes in impregnation tank; If the height of lacquer painting is lower than when exceeding rotor short-circuit ring 50mm in jar, then in impregnation tank, appends organic silicon resin paint and be higher than rotor short-circuit ring 50mm until lacquer painting;

E, said drying steps are to inject dry gas in the impregnation tank to steps d, in impregnation tank, press to reach >=0.4MPa, and it is held time and is controlled in 18 ~ 30 minutes scopes, opens impregnation tank then, press in to be impregnated jar and take out rotor after reaching normal pressure;

F, said cleaning are to wipe unnecessary organic silicon resin paint on the rotor of step e drying;

G, said curing schedule are that the rotor after step f cleaning is put into the baking oven of temperature 180 ~ 190 ℃ of scopes, will be cured the organic silicon resin paint on rotor surface, always are controlled at curing time in 11.5 ~ 12.5 hours scopes.

2. the method for rotor surface coated fire resistant resin lacquer according to claim 1; It is characterized in that: in the said curing schedule; Be with rotor; Be arranged on the frock and be cured with 10 ~ 20 rev/mins speed rotation, be controlled at curing time total curing time 1/3rd in, rotor keeps static in remaining curing time.

3. the method for rotor surface coated fire resistant resin lacquer according to claim 1; It is characterized in that: said preheat with the used baking oven of curing schedule in the Temperature Distribution ERROR CONTROL in 5 ℃, and said baking oven in programming rate be controlled in 70 ~ 120 ℃/h scope.

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