KR102284994B1 - A cooling system of Turbo blower - Google Patents

Abstract

In accordance with one aspect of the present invention, a cooling system of a turbo air blower comprises: a cylindrical motor housing; a driving device formed in the motor housing and rotating a rotor; a cooling device formed in the driving device and introducing cooled air into the motor housing; a cooling device formed in the driving device and introducing cooled air into the motor housing; an air blowing device coupled to one surface of the motor housing and configured to change the position of a flow path while rotated by the rotor; a passage casing which surrounds the air blowing device and is coupled to the motor housing; back plates formed at both ends of the motor housing, respectively, and through which the rotor passes; a plate cap coupled to the back plate and having a sealing material for preventing the leakage of a fluid; an inlet hole through which cooling air is introduced into the motor housing; a cooling space which is formed between the motor housing and the driving device and in which the cooling air is circulated; and a discharge pipe formed on one end of the motor housing and configured to discharge air used to cool the driving device. The cooling device may include a cooling impeller coupled to the rotor, and discharging cooling air to the discharge pipe while rotating. In accordance with the present invention, the inlet hole is formed in the motor housing such that cooling air can cool the motor while circulated inside the motor housing.

Description

A cooling system of Turbo blower

The present invention relates to a cooling system for a turbo blower, and more particularly, to a cooling system for a turbo blower capable of cooling a motor of a turbo blower by circulating cooling air inside a motor housing.

In general, a blower refers to a mechanical device that generates energy of a fluid, and the blower consists of an impeller for generating a flow, and a casing for guiding the flow into and out of the impeller.

There are various methods of classifying the blower, and according to the characteristics of the flow passing through the impeller, it is divided into an axial blower, a radial blower, and a mixed flow blower.

For example, the semi-flow type blower is mainly used to increase the pressure by centrifugal force, and thus is widely used where pressure rather than flow rate is required.

In addition, centrifugal blowers usually use a helical casing so that the impeller inlet flow is in the direction of the axis of rotation but the outlet flow is in the direction perpendicular to the axis of rotation, and a tubular casing is used so that both the impeller inlet and outlet flows are in the direction of the axis of rotation. cases are largely distinguished.

A turbo blower, a type of centrifugal blower, refers to a centrifugal blower with a relatively high pressure ratio, and the impeller rotates at a high speed in the container to make the gas flow radially. A centrifugal fan or turbo fan is called a centrifugal fan, and a blower with a pressure ratio higher than that is called a centrifugal fan or turbo blower.

Such a turbo blower includes a main body forming an exterior, a driving unit provided inside the main body to substantially pressurize air, and a control unit for controlling the driving of the driving unit, and the air introduced into the main body through an air inlet formed in the main body is supplied to the driving unit. It is discharged after being pressurized to a certain pressure or more.

However, in the prior art, the noise generated from the internal driving unit was largely transmitted to the outside, and an internal structure for properly cooling the internal components of the driving unit was not provided, so the lifespan of the internal components decreased, thereby reducing the durability of the entire driving unit. occurred.

Cooling is usually performed by using intake air or gas introduced into the impeller, or by blowing a large amount of air through an air gap formed between the rotor and the stator or a cooling hole formed in the stator.

However, the former method has a disadvantage in that although the power required for cooling is small, the sensitivity to the impeller is very high because the cooling system itself has a structure closely interlocking with the impeller.

That is, since the structure of the cooling system is changed according to the design shape of the impeller, there are many restrictions on the degree of freedom in design.

In addition, there is a problem in that the overall size of the turbo device increases due to the characteristics of the cooling system.

And, the latter method has a disadvantage in that cooling efficiency is very low because it has a structure in which a large amount of air is blown at a considerable pressure using a cooling fan.

Therefore, the cooling system that relies on the cooling fan has a problem in that it consumes a relatively large amount of power to maintain an appropriate level of cooling. had to be reduced.

As a result, there is a demand for a direct-coupled turbo blower cooling structure capable of thermal balance.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a cooling system for a turbo blower capable of cooling a motor by introducing cooling air into a motor housing.

Another object of the present invention is to provide a cooling system for a turbo blower capable of controlling the temperature by adjusting the pressure of air.

Another object of the present invention is to provide a cooling system for a turbo blower capable of cooling a motor by introducing a part of sucked air.

A cooling system for a turbo blower according to an aspect of the present invention for achieving the above object includes a cylindrical motor housing, a driving device formed inside the motor housing, a driving device for rotating a rotor, and the driving device, , a cooling device for introducing cooled air into the motor housing, a blower coupled to one surface of the motor housing and changing a position of a flow path as it rotates by the rotor, and surrounding the blower, the motor A plate cap having a flow path casing coupled to the housing, formed at both ends of the motor housing, respectively, a back plate through which the rotor passes, and a plate cap coupled to the back plate and provided with a sealing material for preventing the fluid from escaping; An inlet hole for introducing cooling air into the motor housing, a cooling space formed between the motor housing and the driving device and circulating the cooling air, and one end of the motor housing, the driving device and a discharge pipe for discharging the cooled air, and the cooling device may include a cooling impeller coupled to the rotor and discharging cooling air to the discharge pipe as it rotates.

It may include a stator formed in the driving device and spaced apart from the rotor to rotate the rotor, and a coring formed on both sides of the stator and having through-holes through which cooling air passes.

The inlet hole may include a first inlet through which the cooling air is introduced, and a second inlet formed at a lower end of the first inlet and having a width narrower than that of the first inlet to increase the pressure of the cooling air.

The inlet hole is formed in the plate cap, a first supply port through which cooling air is supplied, a second supply port formed by bending from the inlet port to the cooling space, and formed through the back plate; It is formed in the sphere, it may be provided with a filtering device for filtering foreign substances in the cooling air supplied to the cooling space.

The cooling space may include a cooling unit formed between the stator and the blower, and a cooling unit in which the cooling unit is formed, and a moving unit formed between the stator, the motor housing, and the rotor, respectively, and through which cooling air moves. there is.

A control plate formed on the coring to adjust a diameter of the through hole to adjust a pressure of cooling air, and the moving part may be wider in a direction from the through hole to the discharge pipe.

A supply device which is formed on the back plate and the plate cap, respectively, to which air is supplied from the flow path casing, and a control device for controlling the inflow of cooling air by controlling the supply device and the regulating plate may be provided.

At least one supply device is formed in the plate cap, an entrance through which air sucked by the blower enters the cooling space, and is formed in the back plate, and as it rotates, it is variable to a position corresponding to the entrance opening. It may be provided with a variable plate in which the variable hole is formed.

The blower may include an impeller coupled to an end of the rotor and sucking a fluid, a diffuser formed between the impeller and the flow path casing, and one end coupled to the flow path casing to increase static pressure.

a scroll volute formed on the flow path casing and configured to change the position of the flow path sucked from the impeller; a scroll cover formed on the front surface of the impeller and coupled to one side of the scroll volute to generate hydraulic pressure; A nozzle coupled to the front surface of the scroll cover and through which a fluid is introduced may be provided.

According to the cooling system of the turbo blower according to the present invention, an inlet hole is formed in the motor housing so that cooling air is circulated inside the motor housing to cool the motor.

In addition, it is possible to reduce the temperature of the air by adjusting the speed of the air according to the pressure by varying the width of the movement of the air.

In addition, it is possible to cool the motor by inducing some of the air sucked by the impeller to the motor.

1 is a perspective view showing a cooling system of a turbo blower according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating a cooling system of the turbo blower shown in FIG. 1;
3 is a cross-sectional view showing an inlet hole according to an embodiment of the present invention.
4 is an exemplary view showing a cooling space according to an embodiment of the present invention.
5 is a cross-sectional view showing a supply device according to an embodiment of the present invention.
Figure 6 is a perspective cross-sectional view showing the supply device shown in Figure 5.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to these embodiments and may be modified in various forms.

In the drawings, in order to clearly and briefly describe the present invention, the illustration of parts irrelevant to the description is omitted, and the same reference numerals are used for the same or extremely similar parts throughout the specification. In addition, in the drawings, the thickness, width, etc. are enlarged or reduced in order to make the description a little clearer, and the thickness, width, etc. of the present invention are not limited to the bars shown in the drawings.

And, when a certain part "includes" another part throughout the specification, other parts are not excluded unless otherwise stated, and other parts may be further included.

1 is a perspective view illustrating a cooling system of a turbo blower according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a cooling system of the turbo blower shown in FIG. 1 .

As shown in FIG. 1, the cooling system of a turbo blower according to an embodiment of the present invention is a motor generated during rotation of an impeller 410 of a turbo blower having a relatively high pressure ratio among blowers generating fluid energy. It is for cooling.

The cooling system of the turbo blower of the present invention rotates the impeller 410 to suck in air and discharge it to the outside to convert kinetic energy into potential energy to discharge air at a high pressure. At this time, the motor for rotating the impeller 410 generates high heat in the driving process, and failure or damage may occur due to the heat. In general, a cooling fan is used to cool the motor, but this reduces the efficiency of the motor by separately using the power transmitted to the motor. In contrast, the cooling system of the turbo blower of the present invention cools the motor by circulating external cooled cooling air. will be.

The cooling system of the turbo blower of the present invention includes a cylindrical motor housing 100 , a driving device 200 formed inside the motor housing 100 and rotating a rotor 211 , and the driving device 200 . A cooling device 300 for introducing cooled air into the motor housing 100 and coupled to one surface of the motor housing 100, as it rotates by the rotor 211, the position of the flow path It may include a blower 400 that varies the airflow rate, and a flow path casing 500 that surrounds the blower 400 and is coupled to the motor housing 100 .

The motor housing 100 is formed to surround a motor such as a rotor 211 that rotates the impeller 410, and protects the motor and circulates cooling air to the motor. The motor housing 100 is opened inside and the driving device 200 for rotating the rotor 211 can be fastened, and a plurality of fastening plates for fastening the driving device 200 are formed. In the fastening plate, the inner shell 102 is formed so as to be spaced apart from the outer shell 101 of the motor housing 100 so that the rotor 211 is positioned at the center of the motor housing 100, and the inner shell 102 is spaced from the outer shell 101. located by the plate. And the fastening plate is opened so that the driving device 200 is positioned between the inner shell 102 and the outer shell 101, and a fastening groove to which the coring 220 to be described later is fastened is formed. In addition, a plurality of inlet holes 130 are formed in the outer shell 101 of the motor housing 100 , and the inlet holes 130 are formed in the direction of the blower 400 so that cooling air is supplied to the blower of the motor housing 100 . (400) to flow to the front.

The inlet hole 130 is formed at the lower end of the first inlet 131 through which the cooling air is introduced and the first inlet 131, and is formed narrower than the first inlet 131 in order to increase the pressure of the cooling air. A second inlet 132 is provided. This is to ensure that when the cooling air flows into the motor housing 100, the temperature does not rise due to high pressure and flows at a high speed.

In another embodiment, referring to FIG. 3 , the inlet hole 130 is formed in the plate cap 120 , the first supply port 133 to which cooling air is supplied, and the inlet to the cooling space 140 are bent. and a second supply port 134 formed through the back plate 110 and a filtering device formed in the second supply port 134 and filtering foreign substances in the cooling air supplied into the motor housing 100 . (135) is provided. This is to flow into the inside of the motor housing 100 in the direction in which the cooling air moves by the cooling device 300 . In addition, the filtering device 135 may generate heat to filter foreign substances and at the same time evaporate moisture contained in the cooling air by heat.

A plurality of back plates 110 and plate caps 120 are formed at both ends of the motor housing 100 , and the back plates 110 and plate caps 120 are formed to be coupled to each other. In addition, the plate cap 120 is formed with a sealing material to prevent the fluid from escaping to the outside. As such, when the fluid is prevented from being separated to the outside by the sealing material of the plate cap 120 , a cooling space 140 is formed between the outer shell 101 and the inner shell 102 of the motor housing 100 , and the cooling space 140 . ) is to circulate external cooling air as the cooling device 300 is formed.

Then, the cooling air is circulated to cool the driving device 200 and then discharged through the discharge pipe 150 formed on the rear surface of the motor housing 100 . At this time, the cooling air discharged through the discharge pipe 150 is discharged after the temperature rises by the driving device 200 .

Here, the cooling space 140 is formed in the driving device 200 with reference to FIG. 4 , the stator 210 spaced apart from the rotor 211 and formed on both sides of the stator 210 to be cooled. It is partitioned by the coring 220 in which the through-hole 230 through which air passes is formed. The cooling space 140 is formed between the stator 210 and the blower 400 , the cooling unit 141 in which the cooling device 300 is formed, the stator 210 , the motor housing 100 , and the rotor 211 . ) are formed between each, and the moving part 142 through which the cooling air moves is formed. The moving part 142 is formed of a first moving part 142 formed between the stator 210 and the motor housing 100 and a second moving part 142 formed between the stator 210 and the rotor 211 . and to cool the stator 210 by the cooling air moving through the moving part 142 .

At this time, the through-holes 230 are formed on both sides of the stator 210 to induce cooling air to move around the stator 210 . In addition, the diameter of the through hole 230 is controlled by the control plate 221 formed in the coring 220 to control the pressure of the cooling air. In detail, if the size of the through hole 230 is small and the pressure is high and the cooling air moves at a high speed, the stator 210 can be cooled more effectively as the temperature of the cooling air is decreased. At this time, the stator 210 adjusts the size of the through hole 230 in order to control the temperature of the cooling air according to the power to rotate the rotor 211. When the temperature of the cooling air drops a lot, the moisture in the stator 210 Since this may occur, the temperature of the cooling air is controlled by adjusting the size of the through hole 230 .

In addition, a desiccant that absorbs moisture is formed in the coring 220 , and the moisture is evaporated by the cooling air delivered to the stator 210 . This prevents moisture from being generated when the stator 210 is driven by heat to evaporate moisture, but when the stator 210 is weakly driven to generate no heat.

And the first moving part 142 and the second moving part 142 by adjusting the thickness of the inner shell 102 and the outer shell 101 of the motor housing 100, the first moving part 142 and the second moving part ( The moving speed of the cooling air can be adjusted by making the width of the 142) wider from the front to the rear in the direction of the blower 400 . Accordingly, the temperature of the cooling air may be supplied to the stator 210 in a low state to cool the stator 210 .

In addition, the stator 210 is a coil wound to rotate the rotor 211 which rotates about a rotation axis, and generates magnetic force according to the flow of current. Accordingly, since the stator 210 generates heat, cooling air is circulated on both sides to cool the heat.

And formed in the cooling unit 141 of the cooling space 140, the cooling device 300 for guiding the cooling air introduced by the inlet hole 130 toward the stator 210 is coupled to the rotor 211 to blow When the device 400 rotates, a cooling impeller 310 that rotates at the same time is formed. The cooling impeller 310 extends from the rotor 211 and rotates in the cooling unit 141 , and as the direction of the impeller 410 is formed to face the rear of the motor housing 100 , the cooling air moves to the rear of the stator (210) is to cool. At this time, as the cooling impeller 310 rotates at the same speed as the blower 400 , it can be cooled according to the load of the stator 210 . Specifically, when the blower 400 is rotated with a strong rotational force, the load on the stator 210 increases, so the cooling impeller 310 is rotated at the same speed as the blower 400 to increase the cooling effect and lower the blower 400. When rotating with a rotational force, the speed of the cooling impeller 310 is lowered, so that the cooling effect of the stator 210 is constantly maintained.

In this way, the blower 400 rotating together with the cooling impeller 310 is coupled to the end of the rotor 211 penetrating the back plate 110 and the plate cap 120 , and the fluid is transferred by the flow path casing 500 . A suction impeller 410 and a diffuser 420 for increasing the static pressure between the impeller 410 and the flow path casing 500 are provided. The impeller 410 is formed to face the cooling impeller 310 in the other direction, and the diameter is formed wider as it goes from one end to the other end, so that the kinetic energy of the fluid is converted into potential energy and discharged to the outside.

In addition, the flow passage casing 500 is formed to surround the impeller 410 , and a scroll volute for changing the position of the flow passage sucked from the impeller 410 and a scroll cover formed on the front surface of the impeller 410 to generate hydraulic pressure. 520 is formed. The scroll volute is formed with an open front so that the scroll cover 520 is coupled thereto, and an extension pipe extending upward from one side is formed to discharge the fluid sucked by the impeller 410 to the upper side. A nozzle 530 through which a fluid flows is formed on the front surface of the scroll cover 520 , and the nozzle 530 has a predetermined length to guide the fluid by the impeller 410 .

In this way, the air sucked by the impeller 410 rises upward as shown in FIGS. 5 to 6 , and a part of the air is sucked by the supply device 160 formed on the back plate 110 and the plate cap 120 . It is introduced into the motor housing 100 . At this time, at least one supply device 160 is formed in the plate cap 120 , and an entry port 161 for guiding air to enter the cooling space 140 is formed. A variable plate 162 is formed on the back plate 110 coupled to the plate cap 120 and rotates at a predetermined angle. Variable holes 163 are formed in the variable plate 162 at the same interval and size as the entrance 161, and when the variable plate 162 is rotated, the variable hole 163 and the entrance 161 are moved to a position corresponding to each other. Since it is formed, some of the fluid sucked by the impeller 410 flows into the cooling space 140 . Specifically, if the stator 210 is not cooled by the cooling air flowing in through the inlet hole 130 , the variable plate 162 is rotated to the impeller 410 through the entrance 161 and the variable hole 163 . The stator 210 is cooled by introducing a portion of the fluid sucked by the stator 210 . And when the temperature of the stator 210 is maintained constant, the variable plate 162 is rotated to close the entrance 161 .

The throttle plate 221 formed on the coring 220 of the supply device 160 and the driving device 200 is controlled by the control device 170 , and the control device 170 includes the stator 210 and the cooling space 140 . ) by measuring the temperature by a temperature sensor to control the variable plate 162 and the control plate 221 of the supply device (160). In this case, the control device 170 , the supply device 160 , and the throttle plate 221 are driven by the power of the stator 210 or a separate power to cool the stator 210 to reduce the load.

In the above, the cooling system of a turbo blower according to an embodiment of the present invention has been described, but the spirit of the present invention is not limited to the embodiment presented herein. And, those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, adding, etc. components within the scope of the same spirit, but this is also within the scope of the present invention. will say it costs

100: motor housing 101: outer shell
102: lining 110: back plate
120: plate cap 130: inlet hole
131: first inlet 132: second inlet
133: first supply port 134: second supply port
135: filtering device 140: cooling space
141: cooling unit 142: moving unit
150: discharge pipe 160: supply device
161: entrance 162: variable plate
163: variable hole 170: control device
200: drive unit 210: stator
211: rotor 220: coring
221: throttle plate 230: through hole
300: cooling device 310: cooling impeller
400: blower 410: impeller
420: diffuser 500: euro casing
510: scroll blue 520: scroll cover
530: nozzle

Claims (10)

Cylindrical motor housing,
a driving device formed inside the motor housing and rotating the rotor;
a cooling device formed in the driving device and introducing cooled air into the motor housing;
a blower coupled to one surface of the motor housing and configured to change the position of the flow path as it rotates by the rotor;
and a passage casing that surrounds the blower and is coupled to the motor housing,
a back plate formed at both ends of the motor housing and through which the rotor passes;
a plate cap coupled to the back plate and having a sealing material for preventing the escape of the fluid;
an inlet hole for introducing cooling air into the motor housing;
a cooling space formed between the motor housing and the driving device and circulating the cooling air;
and an exhaust pipe formed at one end of the motor housing and discharging the air cooled by the driving device;
The cooling device includes a cooling impeller coupled to the rotor and discharging cooling air to the discharge pipe as it rotates,
a stator formed in the driving device and spaced apart from the rotor to rotate the rotor;
It is formed on both sides of the stator and includes a coring in which a through hole through which cooling air passes is formed,
The cooling space is formed between the stator and the blower, and a cooling unit in which the cooling device is formed;
It is formed between the stator, the motor housing, and the rotor, respectively, and includes a moving part through which cooling air moves,
and a regulating plate formed on the coring and adjusting the pressure of the cooling air by adjusting the diameter of the through hole;
The moving part is wider in the direction of the discharge pipe from the through hole,
a supply device formed on the back plate and the plate cap, respectively, to which air is supplied from the flow path casing;
and a control device for controlling an inflow amount of cooling air by controlling the supply device and the throttle plate.
delete The method of claim 1,
The inlet hole includes a first inlet through which cooling air is introduced;
and a second inlet formed at a lower end of the first inlet and narrower in width than the first inlet to increase the pressure of the cooling air.
The method of claim 1,
The inlet hole is formed in the plate cap, the first supply port through which cooling air is supplied;
a second supply port formed by being bent from the inlet hole into the cooling space and penetrating the back plate;
and a filtering device formed in the second supply port and filtering foreign substances in the cooling air supplied to the cooling space.
delete delete delete The method of claim 1,
At least one supply device is formed in the plate cap, and an inlet through which air sucked by the blower enters the cooling space;
and a variable plate formed on the back plate and having variable holes that change to a position corresponding to the entrance hole as it rotates.
The method of claim 1,
The blower is coupled to the end of the rotor, and an impeller for sucking the fluid;
and a diffuser formed between the impeller and the flow passage casing, one end coupled to the flow passage casing, and increasing the static pressure.
10. The method of claim 9,
a scroll volute formed on the flow path casing and configured to change the position of the flow path sucked from the impeller;
a scroll cover formed on the front surface of the impeller and coupled to one side of the scroll volute to generate hydraulic pressure;
and a nozzle coupled to the front surface of the scroll cover through which a fluid is introduced.

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