KR102098165B1 - Stator auto drying system capable of measuring insulation resistance - Google Patents

Abstract

The present invention relates to an automatic stator drying system capable of measuring insulation resistance, which can contribute to productivity improvement. The automatic stator drying system capable of measuring insulation resistance comprises: a drying chamber forming a place in which a stator is dried; a hot air spray duct arranged in an edge direction of an inner wall of the drying chamber, and provided with a plurality of hot air nozzles to spray hot air to dry a stator in the drying chamber; an air discharge duct which is arranged on the inner wall of the drying chamber at a position separated from the hot air spray duct, and discharges air in the drying chamber; an air circulation duct connecting the hot air spray duct and the air discharge duct to form a circulation structure of air; a heater which is arranged in an area in which the air circulation duct and the hot air spray duct are connected to each other, and heats air circulated to the air circulation duct; a hot air blower which is arranged in front of the heater, and blows air heated by the heater to the hot air spray duct; an outside air supply duct arranged on one side of the inner wall of the drying chamber; an outside air inlet fan which is arranged in the outside air supply duct, and forcibly moves the outside air into the drying chamber; and an insulation resistance measurement device which is arranged on the outside of the drying chamber, is connected to a stator in the drying chamber, and measures the insulation resistance of the stator.

Description

Stator auto drying system capable of measuring insulation resistance

The present invention relates to a stator automatic drying system capable of measuring insulation resistance, and more particularly, it is possible to significantly shorten the drying time compared to the prior art, thereby saving energy and producing a product of excellent quality. It relates to a stator automatic drying system capable of measuring insulation resistance, which can contribute to productivity improvement through shortening of the process by allowing insulation resistance to be measured automatically during drying.

The stator is a coil structure fixedly installed in an electric device such as an induction motor. It is one of the important parts or devices used when manufacturing an electric motor together with a rotor.

These stators are made by winding coils while stacking iron cores to create a rotating magnetic field. It is common to impregnate the varnish after the winding, and then it is produced as a product through a drying process.

On the other hand, the drying process of the stator consists of forced blowing of hot air (hot air) by the heater. That is, after the stator to be dried is put into the drying chamber, the stator is dried by operating a heater to supply hot air to the drying chamber.

However, this traditional drying method is a form in which high-temperature air containing a large amount of moisture continuously circulates in the drying room, so it takes a lot of drying time to consume energy, and during drying, the winding varnish contains moisture and the stator quality deteriorates. The problem arises.

In addition, considering that the process of measuring the insulation resistance of the stator in the measurement chamber was performed after the operator removed the stator from the drying chamber and moved to the measurement chamber after the drying of the stator was completed, the productivity of the stator took too long. There is a problem that is bound to fall.

Korea Patent Office Application No. 10-2013-0167745

The object of the present invention is that the drying time can be significantly shorter than in the prior art, so that energy can be saved as well as products of excellent quality, and insulation resistance can be measured automatically during drying, thereby reducing the process. It is to provide a stator automatic drying system capable of measuring insulation resistance, which can contribute to productivity improvement.

The above object is a drying chamber forming a place where the stator is dried; A hot air jet duct disposed along a circumferential direction of the inner wall of the drying chamber and having a plurality of hot air jets for spraying hot air for drying the stator in the drying chamber; An air discharge duct provided on an inner wall of the drying chamber at a position spaced apart from the hot air injection duct, and discharging air in the drying chamber; An air circulation duct connecting the hot air injection duct and the air discharge duct to form a circulation structure of air; A heater arranged in an area where the air circulation duct and the hot air injection duct are connected, and heating air circulated through the air circulation duct; A hot air blower which is disposed in front of the heater and blows air heated by the heater through the hot air injection duct; An outside air supply duct provided on one side of the inner wall of the drying chamber; An outside air inflow fan provided in the outside air supply duct and forcibly introducing the outside air into the drying chamber; And an insulation resistance measuring device provided outside the drying chamber and connected to the stator in the drying chamber, and measuring the insulation resistance of the stator.

A ventilation duct provided on the other side of the inner wall of the drying chamber; And an automatic switch provided on the ventilation duct and automatically opening and closing the ventilation duct.

A temperature measuring instrument provided in the drying chamber and measuring a temperature in the drying chamber; And it is provided in the drying chamber, it may further include a humidity meter for measuring the humidity in the drying chamber.

It is disposed outside the drying chamber, and may further include an external notification unit notifying that the stator drying process and the insulation resistance measurement process are completed.

When the inside of the drying chamber reaches a set temperature and humidity, the heater, the hot air blower, the outside air inflow fan, and the automatic switch operation are repeatedly on / off control while the insulation resistance meter is measured. When reaching the infinity, the external notification unit may further include a controller to control that the operation of the system is stopped while notifying that the stator drying process and the insulation resistance measurement process are completed.

A plurality of stator loading units in which the stators are loaded may be provided on the bottom of the drying chamber.

According to the present invention, it is possible to significantly shorten the drying time compared to the conventional one, thereby saving energy, as well as producing a product of excellent quality, and by allowing the insulation resistance to be measured automatically during drying, productivity through shortening of the process. It has an effect that can contribute to improvement.

1 is a schematic configuration diagram of a stator automatic drying system capable of measuring insulation resistance according to an embodiment of the present invention.
2 is a schematic internal structure diagram of a drying chamber area.
3 and 4 are views for explaining the operation of the stator automatic drying system of FIG.
FIG. 5 is a control block diagram of the stator automatic drying system of FIG. 1.
6 is a schematic configuration diagram of a stator automatic drying system capable of measuring insulation resistance according to another embodiment of the present invention.
7 is an enlarged view of region A of FIG. 6.
8 is a structural diagram of the first and second opening and closing plates.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms.

In the present specification, this embodiment is provided to make the disclosure of the present invention complete, and to fully inform the scope of the invention to those skilled in the art to which the present invention pertains. And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well-known components, well-known operations, and well-known techniques are not specifically described to avoid obscuring the present invention.

The same reference numerals refer to the same components throughout the specification. In addition, the terms (mentioned) used in the present specification are for describing the embodiments and are not intended to limit the present invention.

In the present specification, the singular form also includes the plural form unless specifically stated in the phrase. Also, components and actions (actions) referred to as 'include (or have)' do not exclude the presence or addition of one or more other components and actions.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by those skilled in the art to which the present invention pertains.

In addition, commonly used dictionary-defined terms are not interpreted ideally or excessively, unless defined.

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

1 is a schematic structural diagram of a stator automatic drying system capable of measuring insulation resistance according to an embodiment of the present invention, FIG. 2 is a schematic internal structure diagram of a drying chamber area, and FIGS. 3 and 4 are automatic drying of the stator of FIG. 1. The drawings for explaining the operation of the system, and FIG. 5 is a control block diagram for the stator automatic drying system of FIG. 1.

Referring to these drawings, applying the present system can significantly shorten the drying time compared to the conventional one, thus saving energy and producing a product of excellent quality, so that the insulation resistance can be measured automatically during drying. By doing so, it is possible to contribute to improving productivity through shortening of the process.

For reference, the system 100 may be used when the stator is manufactured, or may be used to disassemble the motor in use, wash foreign substances such as dust, and then dry again.

Applying the present system in any form can significantly shorten the drying time than in the prior art, and can provide an excellent effect that the insulation resistance can be automatically measured during drying.

The stator automatic drying system 100 capable of measuring insulation resistance according to the present embodiment capable of providing such an effect includes a drying chamber 110 forming a place where the stator is dried, and is provided at each location of the drying chamber 110 below. Its structure takes the form of being mounted.

A plurality of stator loading units 111 on which the stator is loaded is provided on the bottom of the drying chamber 110. The stator may perform a drying process and an insulation resistance measurement process while being stably loaded on the stator loading unit 111.

Although three stator loading parts 111 are illustrated in the drawing, this is only one example. Therefore, the scope of the present invention is not limited to the shape of the drawings.

A hot air jet duct 121 is provided in the drying chamber 110. The hot air injection duct 121 is disposed along the circumferential direction of the inner wall of the drying chamber 110, and sprays hot air for drying the stator in the drying chamber 110.

A plurality of hot air jet openings 122 are formed in the hot air jet duct 121. As described above, since the hot air injection duct 121 is disposed along the circumferential direction of the inner wall of the drying chamber 110, drying efficiency may be increased.

An air discharge duct 123 for discharging air in the drying chamber 110 is provided on an inner wall of the drying chamber 110 at a position spaced apart from the hot air injection duct 121. And, the hot air injection duct 121 and the air discharge duct 123 is connected to the air circulation duct 124.

Accordingly, air (heater) may be circulated to the hot air injection duct 121, the air circulation duct 124 and the air discharge duct 123. It is possible to increase the temperature of the drying chamber 110 while recycling heat through this structure, that is, the air circulation structure.

In the region where the air circulation duct 124 and the hot air injection duct 121 are connected, a heater 131 for heating the air circulated to the air circulation duct 124 is provided.

And, in front of the heater 131 is provided with a hot air blower 133 for blowing air from the heater 131 to the hot air injection duct 121. The heating temperature by the heater 131 and the rotational speed of the hot air blower 133 may be appropriately controlled by the controller 180.

The outside air supply duct 125 is provided on one side of the inner wall of the drying chamber 110. And, inside the outside air supply duct 125 is provided with an outside air inlet fan 135 forcing the outside air into the drying chamber 110.

On the other side of the outside air inflow fan 135, that is, on the other side of the inner wall of the drying chamber 110, a ventilation duct 126 is provided. In addition, an automatic switch 140 that automatically opens and closes the ventilation duct 126 is provided in the ventilation duct 126. The automatic switch 140 may be opened as shown in FIG. 3 by the controller 180 or closed as shown in FIG. 4.

Outside the drying chamber 110 is connected to the stator in the drying chamber 110, an insulation resistance meter 160 is provided for measuring the insulation resistance of the stator. In particular, the insulation resistance meter 160 operates during the stator drying process to measure the insulation resistance of the stator, thereby shortening the process time and contributing to productivity improvement.

On the other hand, the stator automatic drying system 100 of the present embodiment is further equipped with a temperature meter 162, a humidity meter 164, an external notification unit 166 and a controller 180 for gun trawling of the system.

The temperature measuring instrument 162 is provided in the drying chamber 110 and serves to measure the temperature in the drying chamber 110. The humidity meter 164 is provided in the drying chamber 110 and serves to measure humidity in the drying chamber 110.

Then, the external notification unit 166 is disposed outside the drying chamber 110, and serves to inform that the drying process of the stator and the insulation resistance measurement process are completed. The external notification unit 166 may be a lamp or a buzzer.

When the inside of the drying chamber 110 reaches a set temperature and humidity, the controller 180 repeatedly turns on / off the operation of the heater 131, the hot air blower 133, the outside air inflow fan 135, and the automatic switch 140 ( on / off) When the value measured by the insulation resistance meter 160 reaches infinity, the external notification unit 166 informs that the drying process of the stator and the insulation resistance measurement process are completed, and the operation of the system is stopped. Control.

The controller 180 performing such a role may include a central processing unit 181 (CPU), a memory 182 (MEMORY), and a support circuit (183, SUPPORT CIRCUIT).

The central processing unit 181 is a heater 131, a hot air blower 133, an outside air inlet fan 135, and an automatic switch 140 based on the measured values of the temperature meter 162 and the humidity meter 164 in this embodiment. ) Can be one of various computer processors that can be applied industrially to control the operation.

The memories 182 and MEMORY are connected to the central processing unit 181. The memory 182 may be installed in a local or remote location as a computer-readable recording medium, and is readily available, for example, random access memory (RAM), ROM, floppy disk, hard disk, or any digital storage form. It may be at least one memory.

The support circuit 183 (SUPPORT CIRCUIT) is combined with the central processing unit 181 to support the typical operation of the processor. The support circuit 183 may include a cache, a power supply, a clock circuit, an input / output circuit, a subsystem, and the like.

In this embodiment, the controller 180 repeatedly operates the heater 131, the hot air blower 133, the outside air inlet fan 135, and the automatic switch 140 when the drying chamber 110 reaches a set temperature and humidity. On / off control, and when the value measured by the insulation resistance meter 160 reaches infinity, informs the drying process of the stator and the insulation resistance measurement process is completed through the external notification unit 166. In order to control the operation to be stopped, a series of control processes and the like may be stored in the memory 182. Typically, software routines may be stored in memory 182. Software routines may also be stored or executed by other central processing units (not shown).

Although the process according to the invention has been described as being executed by a software routine, it is also possible that at least some of the processes of the invention are performed by hardware. As such, the processes of the present invention may be implemented in software executed on a computer system, hardware such as an integrated circuit, or a combination of software and hardware.

Hereinafter, the operation of the stator automatic drying system 100 will be described.

This system loads the stator containing a large amount of moisture into the drying chamber 110 as shown in FIG. 3, and then injects hot air (heater) by the heater into the drying chamber 110 while recycling heat through an air circulation structure while recycling the heat. It is a method of drying by raising the temperature of (110).

At this time, while the high-temperature air containing a large amount of moisture continues to circulate, a lot of drying time is required, and when drying, there may be a problem that the winding varnish contains moisture, and thus the stator quality may be deteriorated. Likewise, the outside air having a low humidity is forcibly supplied into the drying chamber 110 through the outside air inflow fan 135, and the inside of the high-humidity air is forcibly discharged to the outside by opening the opposite automatic switch 140. This action is automatically performed when an abnormal humidity is detected, thereby effectively preventing unnecessary drying time from being delayed.

Of course, when the outside air inflow fan 135 and the automatic switch 140 are operated as shown in FIG. 4, the operation of the heater 131 is temporarily stopped.

According to this embodiment acting on the basis of the structure as described above, it is possible to significantly reduce the drying time than in the prior art, which can save energy as well as produce a product of excellent quality, and automatically insulates during drying By allowing the resistance to be measured, it is possible to contribute to productivity improvement by shortening the process.

6 is a schematic configuration diagram of an automatic stator drying system capable of measuring insulation resistance according to another embodiment of the present invention, FIG. 7 is an enlarged view of region A of FIG. 6, and FIG. 8 is a first and second switchgear It is a structural diagram.

Referring to these drawings, the stator automatic drying system 200 capable of measuring insulation resistance according to the present embodiment also includes a drying chamber 210 that forms a place where the stator is dried, and is provided at each location of the drying chamber 210 below. Its structure takes the form of being mounted.

Although the structure provided in the drying chamber 210 is substantially similar to the above-described embodiment, the structure of the ventilation duct 220 and the automatic switch 240 applied thereto is different from the above-described embodiment. Therefore, we will focus on these.

As described above, the ventilation duct 220 is a duct for discharging humid air in the drying room 210, and the automatic switch 240 is a device for opening and closing the ventilation duct 220.

At the end of the ventilation duct 220, an inclined guide 227 for guiding air in the drying chamber 210 into the ventilation duct 220 is installed.

When the humidity in the drying chamber 210 is high and the outside air inlet fan 135 and the automatic switch 240 operate to remove them, the air in the drying chamber 210 is ventilated duct 220 without vortex due to the inclined guide 227. You can head to

On the other hand, the automatic switch 240 is a device for opening and closing the ventilation duct 220. The automatic switch 240 includes a cylinder device 241 that is automatically controlled by a controller 180 (see FIG. 5) and a seesaw 242 that is connected to a rod 241a of one end of the cylinder device 241 to move the seesaw. ), The pivot member 243 forming the seesaw central axis of the seesaw 242, and an opening / closing drive rod connected to the seesaw 242 for opening and closing of the ventilation duct 220 and operated by the seesaw 242 (244), the first opening and closing plate 245 rotating by the action of the opening and closing driving rod 244, and the second opening and closing plate for opening and closing the ventilation duct 220 through interaction with the first opening and closing plate 245 ( 246).

The link portion R is coupled between the opening / closing driving rod 244 and the seesaw 242, and between the seesaw 242 and the rod 241a of the cylinder device 241. As the link portion R is coupled to the corresponding position, when the length of the rod 241a is increased or decreased while the cylinder device 241 is operated in place, the seesaw 242 pivots the pivot member 243. By operating the seesaw, the opening and closing driving rod 244 may be operated.

A first through hole 245a is formed in the first opening and closing plate 245. The first opening / closing plate 245 is connected to the opening / closing driving rod 244 and rotates during linear motion of the opening / closing driving rod 244.

The first opening / closing plate 245 and the opening / closing driving rod 244 are connected to operate so that the protruding piece 247 extending from the center of the first opening / closing plate 245, the protruding piece 247, and the opening / closing driving rod ( 244) is provided with a relative rotation connecting portion 248 that is rotatably connected.

The second opening / closing plate 246 includes a second through hole 246a selectively communicating with the first through hole 245a. When the first through hole 245a of the first opening and closing plate 245 communicates with the second through hole 246a of the second opening and closing plate 246, the ventilation duct 220 is opened and the ventilation duct 220 is not applied. Closes. The assembly protrusion 249 formed on the second opening and closing plate 246 is rotatably coupled to the protruding piece 247. Unlike the first opening and closing plate 245, the second opening and closing plate 246 is fixed to the inner wall of the ventilation duct 220 by the stopper (S).

By such a configuration, when the cylinder device 241 is controlled by the controller 180 and the length of the rod 241a is extended or reduced, the opening / closing driving rod 244 may move up and down in conjunction with this, thereby eliminating the As the opening / closing plate 245 rotates, the ventilation duct 220 may be opened or closed according to the relative arrangement of the first through holes 245a and the second through holes 246a.

Even if such a structure is applied, it is possible to significantly shorten the drying time compared to the conventional one, thereby saving energy and producing a high-quality product. Productivity through shortening of the process by automatically measuring insulation resistance during drying Can contribute to improvement.

As described above, the present invention is not limited to the described embodiments, and it can be obvious to those skilled in the art that various modifications and modifications can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations belong to the claims of the present invention.

100: drying system 110: drying room
111: stator loading unit 121: hot air spraying duct
122: hot air nozzle 123: air exhaust duct
124: air circulation duct 125: outside air supply duct
126: ventilation duct 131: heater
133: hot air blower 135: outside air inlet fan
140: automatic switch 160: insulation resistance meter
162: temperature meter 164: humidity meter
166: external notification unit 180: controller

Claims (6)

A drying chamber forming a place where the stator is dried;
A hot air jet duct disposed along a circumferential direction of the inner wall of the drying chamber and having a plurality of hot air jets for spraying hot air for drying the stator in the drying chamber;
An air discharge duct provided on an inner wall of the drying chamber at a position spaced apart from the hot air injection duct, and discharging air in the drying chamber;
An air circulation duct connecting the hot air injection duct and the air discharge duct to form a circulation structure of air;
A heater arranged in an area where the air circulation duct and the hot air injection duct are connected, and heating air circulated through the air circulation duct;
A hot air blower which is disposed in front of the heater and blows air heated by the heater through the hot air injection duct;
An outside air supply duct provided on one side of the inner wall of the drying chamber;
An outside air inflow fan provided in the outside air supply duct and forcibly introducing the outside air into the drying chamber; And
It is provided on the outside of the drying chamber and connected to the stator in the drying chamber, and includes an insulation resistance meter for measuring the insulation resistance of the varnish and coil of the stator,
A ventilation duct provided on the other side of the inner wall of the drying chamber; And
It is provided in the ventilation duct, and further includes an automatic switch that automatically opens and closes the ventilation duct,
A temperature measuring instrument provided in the drying chamber and measuring a temperature in the drying chamber; And
It is provided in the drying chamber, and further includes a humidity meter for measuring the humidity in the drying chamber,
It is disposed outside the drying chamber, and further includes an external notification unit indicating that the drying process of the stator and the insulation resistance measurement process are completed,
When the inside of the drying room reaches a set temperature and humidity, the heater, the hot air blower, the outside air inflow fan, and the automatic switch operation are repeatedly on / off control while the insulation resistance meter is measured. When this infinity is reached, the external notification unit notifies the completion of the drying process and the insulation resistance measurement process of the stator, and further includes a controller that controls the operation of the system to be stopped. system.
delete delete delete delete According to claim 1,
A stator automatic drying system capable of measuring insulation resistance, characterized in that a plurality of stator loading units in which the stators are loaded are provided at the bottom of the drying chamber.

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