KR100707851B1 - A rotary atomizer, and protection system of air-bearing of rotary atomizer - Google Patents

Abstract

The present invention by simply manufacturing the structure to reduce the manufacturing cost, to reduce the maintenance cost by using the air bearing to enable high-speed rotation, by temporarily supplying compressed air in the event of an emergency such as interrupted compressed air The present invention relates to a rotary automatizer and an air bearing protection system of the rotary automator, which can improve the stability and durability of the entire system, such as preventing air bearing damage.

Rotary, Automator, Air Bearings, Protection

Description

ROTARY ATOMIZER, AND PROTECTION SYSTEM OF AIR-BEARING OF ROTARY ATOMIZER}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing the configuration of a rotary atomizer according to the present invention and a diagram showing the configuration of an air bearing protection system.

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

10: drive motor

11: stator

12: rotor

20: rotation axis

30: injection means

31: lower plate

32: top plate

32a: liquid injection hole

33: column member

40: shaft support means

41: upper thrust

42: lower thrust

43: rotation axis guide means

43a: rotating shaft guide body

43b: Installer

43c: Journal side air bearing

43d: shaft support hole

50: compressed air inlet

51: compressed air exhaust port

60: drive motor mounting plate

61: first protective case

61a: side wall plate

61b: floor plate

62: bracket

63: second protective case

62a: cooling water inlet

62b: cooling water outlet

63a: tapered surface

100: compressed air supply means

110: detection sensor

120: compressed air storage tank

121: solenoid valve

130 control means

140: emergency bell

150: inverter

The present invention relates to a rotary automatizer and an air bearing protection system of the rotary automatizer, and more particularly, to simplify manufacturing and to reduce manufacturing costs, and to reduce maintenance costs by using air bearings and to rotate at high speed. Rotary automator and rotary auto to improve the stability and durability of the entire system, such as to prevent the damage of air bearings by temporarily supplying compressed air in case of emergency such as interruption of compressed air. It relates to the air bearing protection system of the Miser.

Rotary auto optimizer system will remove the SO _X by injecting hydrated lime (Ca (OH) ₂₎ of the desulfurization reaction in the semi-dry reaction for removing the acidic noxious gas tower (Semi-Drier Reator) of the incineration process in US Tax enemy status, or It is a microdroplet injection system used in a manufacturing process for producing a dry powder (eg, ceramics, food, pharmaceuticals) by microdropletizing a liquid fluid.

The conventional technology of the rotary atomizer system, which plays the role as described above, is disclosed in Japanese Patent Application Laid-Open No. 7-328489. This technique uses a speed increaser to enable high speed rotation, so that a lot of load is applied during continuous operation. And heat was generated, and as the lubrication device for removing such heat is adopted, the internal structure of the device is complicated, and there is a problem that maintenance is difficult and manufacturing cost is high.

In addition, since the input shaft and the output shaft are rotatably supported through the ball bearing, respectively, the durability of the bearing decreases at high speeds of 10,000 RPM or more, and there is a problem that the bearing must be replaced periodically.

The present invention has been created to solve the above problems, by simply manufacturing the structure to reduce the manufacturing cost, by using the air bearing to reduce the maintenance cost and to enable high-speed rotation, compressed air is stopped It provides a rotary automatizer and an air bearing protection system for the rotary automatizer to improve the stability and durability of the entire system, such as preventing the air bearing from being damaged by temporarily supplying compressed air in an emergency. Its purpose is to.

The present invention for achieving the above object, the drive motor consisting of a stator and a rotor; A rotating shaft rotated by receiving the rotational force of the rotor and installed in a vertical direction; Spraying means installed at a lower end of the rotating shaft to spray liquid supplied from the outside into fine particles; In the rotary automator comprising a shaft support means for rotatably supporting the rotary shaft and connecting the upper end of the rotary shaft to enable power transmission, the shaft support means is the upper end of the rotary shaft and the rotor Interconnecting the upper thrust for transmitting the rotational force of the rotor so that the rotating shaft is rotated; A lower thrust fixed to the rotating shaft spaced apart from the upper thrust by a predetermined distance; A rotary shaft guide body, a journal side air bearing installed vertically on the entire inner surface of the installation hole penetrated up and down in the center of the rotary shaft guide body to form an axial rotation support hole in the center, and the upper and lower surfaces of the rotary shaft guide body The upper and lower thrust side air bearings are respectively provided in the outer portion of the axial rotation support hole and respectively provided in the upper and lower recess spaces formed in the recesses corresponding to the lower and upper surfaces of the upper and lower thrusts, and the rotation shaft corresponding to the upper and lower thrusts is the shaft rotation. Rotation axis guide means is rotatably inserted into the support hole and installed to be moved up and down with respect to the rotation axis corresponding to the upper and lower thrust; Compressed air inlet formed on the outer side of the rotating shaft guide body to allow compressed air to flow into the journal side air bearing and the upper and lower thrust side air bearings, and the compressed air introduced into the journal side air bearing and the upper and lower thrust side air bearings. It characterized in that it comprises a compressed air inlet / exhaust means consisting of a compressed air exhaust port to be exhausted.

Air bearing protection system of the rotary atomizer according to the present invention for achieving the above object, the drive motor consisting of a stator and a rotor; A rotating shaft rotated by receiving the rotational force of the rotor and installed in a vertical direction; Spraying means installed at a lower end of the rotating shaft to spray liquid supplied from the outside into fine particles; And a shaft support means for rotatably supporting the rotary shaft while connecting the upper end of the rotary shaft to enable power transmission, wherein the shaft support means interconnects the upper end of the rotary shaft and the rotor, An upper thrust for transmitting the rotational force of the rotor to rotate the rotational shaft; A lower thrust fixed to the rotating shaft spaced apart from the upper thrust by a predetermined distance; A rotary shaft guide body, a journal side air bearing installed vertically on the entire inner surface of the installation hole penetrated up and down in the center of the rotary shaft guide body to form an axial rotation support hole in the center, and the upper and lower surfaces of the rotary shaft guide body The upper and lower thrust side air bearings are respectively provided in the outer portion of the axial rotation support hole and respectively provided in the upper and lower recess spaces formed in the recesses corresponding to the lower and upper surfaces of the upper and lower thrusts, and the rotation shaft corresponding to the upper and lower thrusts is the shaft rotation. Rotation axis guide means is rotatably inserted into the support hole and installed to be moved up and down with respect to the rotation axis corresponding to the upper and lower thrust; Compressed air inlet formed on the outer side of the rotating shaft guide body to allow compressed air to flow into the journal side air bearing and the upper and lower thrust side air bearings, and the compressed air introduced into the journal side air bearing and the upper and lower thrust side air bearings. Compressed air inlet / outlet means comprising a compressed air exhaust port for exhausting; Compressed air supply means for supplying compressed air to the compressed air inlet; A sensor for sensing the flow of compressed air supplied by the compressed air supply means; A compressed air storage tank connected to the compressed air inlet and having an electromagnetic on / off valve; Controls to control the opening / closing valve of the compressed air stored in the compressed air storage tank to determine the flow rate of the compressed air supplied from the compressed air supply means detected by the sensing sensor so that the compressed air flows into the compressed air inlet. It comprises a means.

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

1 is a cross-sectional view showing the configuration of a rotary atomizer according to the present invention and a diagram showing the configuration of an air bearing protection system.

The present invention comprises a drive motor (10) consisting of a stator (11) and a rotor (12); A rotating shaft 20 which is rotated by receiving the rotational force of the rotor 12 and is installed in a vertical direction; An injection means (30) installed at a lower end of the rotary shaft (20) to inject a liquid supplied from the outside into a fine particle state; In the rotary automator comprising a shaft support means 40 for rotatably supporting the rotary shaft 20 while connecting the upper end of the rotary shaft 20 and the rotor 12 to enable power transmission, the shaft The invention on the support means 40 is based thereon.

The shaft supporting means 40 includes an upper thrust 41, a lower thrust 42, a rotation shaft guide means 43, and compressed air inlet / outlet means.

Here, the rotary shaft 20 is applied to the present invention, for example, the upper rotary shaft 21 is installed between the upper thrust 41 and the lower thrust 42, and the lower rotary shaft installed to extend below the lower thrust 42 It has a configuration of (22).

The upper thrust 41 has a circular cross section, and the upper end of the rotating shaft 20, that is, the upper end of the upper rotating shaft 21 constituting the rotating shaft 20 and the rotor 12 are interconnected to each other. It serves to transmit the rotational force of the rotor 12 so that the rotary shaft 20 is rotated.

More specifically, after the fastening bolt 12a protruding from the lower part of the rotor 12 passes through the center of the upper thrust 41, the upper part of the rotating shaft 20, that is, the upper part constituting the rotating shaft 20. The screw 12 is coupled to the upper end of the rotating shaft 21 to couple the rotor 12 and the rotating shaft 20 to each other.

On the other hand, the lower thrust 42 is fixed to the lower end of the upper rotary shaft 21 constituting the rotary shaft 20 spaced apart from the upper thrust 41 by a predetermined interval downward.

That is, the lower thrust 42 and the upper rotating shaft 21 constituting the rotating shaft 20 are coupled to each other through the fastening bolt 21a.

Here, in the present invention, for example, the rotary shaft 20 is divided into the upper rotary shaft 21 and the lower rotary shaft 22, but described for example, but the upper rotary shaft 21 and the lower rotary shaft 22 is not a separate type but also as an integral type. When it is possible to configure the bar, the lower thrust 42 can be fixed to the outer surface of the rotating shaft 20 by a fixing method such as welding.

In addition, the lower rotation shaft 22 is coupled to the lower thrust 42 through a separate fastening bolt 21b.

On the other hand, the rotary shaft guide means 43 is installed up and down on the entire inner surface of the rotary shaft guide body 43a and the installation hole 43b vertically penetrated in the center of the rotary shaft guide body 43a. The upper and lower thrust parts 41 and 42 of the journal side air bearing 43c forming the axial rotation support hole 43d and the outer side of the axial rotation support hole 43d among the upper and lower surfaces of the rotary shaft guide body 43a. Is provided with upper and lower thrust side air bearings 43e and 43f respectively installed in the upper and lower concave space portions formed in the concave and convex portions corresponding to the lower and upper surfaces of the upper and lower thrusts, respectively. It is rotatably inserted into the axial rotation support hole (43d) and is installed to be movable up and down with respect to the rotating shaft 29 corresponding to the upper and lower thrust (41, 42).

Finally, the compressed air inlet / exhaust means is formed on the outer side of the rotating shaft guide body 43a so that compressed air flows into the journal side air bearing 43c and the upper and lower thrust side air bearings 43e and 43f, respectively. Compressed air inlet (50), and compressed air exhaust port (51) for exhausting the compressed air introduced into the journal side air bearing (43c) and the upper and lower thrust side air bearing (43e) 43f.

Here, the journal side air bearing 43c and the thrust side air bearing 43e and 43f are manufactured to have a fine passage therein. When the compressed air is pressurized and supplied from the compressed air inlet 50, It is ejected through the minute passage formed in the air bearings 43c, 43e, 43f and exhausted to the compressed air exhaust port 51. Such an air bearing is a well-known technique, and thus the detailed description of the internal structure will be omitted. Shall be.

Here, in the present invention, the journal side air bearing 43c and the upper and lower thrust side air bearings 43e and 43f may selectively use any one of an orifice structure bearing, a carbon bearing, and a ceramic bear.

However, in the present invention, only the air movement path from the air introduced through the compressed air inlet 50 to the exhaust of the compressed air outlet 51 will be described.

First, when compressed air is introduced through the compressed air inlet 50, the air introduced into the journal side air bearing 43c passes through the inside of the journal side air bearing 43c, and then the journal side air bearing 43c. Compressed air exhaust port while forming an air layer so that the rotating shaft 20 does not rub against the inner surface of the journal-side air bearing 43c by ejecting into a fine gap between the inner circumferential surface of the upper rotation shaft 21 and the outer circumferential surface of the upper rotating shaft 21 constituting the rotating shaft 20. Exhaust through 51.

In the present invention, the journal side air bearing 43c is separated into an upper journal side air bearing and a lower journal side air bearing so as to separate the upper and lower parts of the upper and lower portions except the middle portion of the rotating shaft guide body 43a. Therefore, the compressed air passing through the inside of the secondary journal side air bearing and the lower journal side air bearing is collected at the center portion of the rotating shaft guide body 43a and finally exhausted to the compressed air exhaust port 51.

Here, the inner surface of the middle portion of the rotating shaft guide body 43a has a fine gap formed so that the outer surface of the upper rotating shaft 21 constituting the rotating shaft 20 and the air can move to the compressed air exhaust port 51.

By doing so, the rotating shaft 20 can be smoothly rotated by the journal side air bearing 43c.

Meanwhile, the compressed air introduced through the compressed air inlet 50 is also supplied to the upper and lower thrust side air bearings 43e and 43f, and the compressed air supplied to the upper and lower thrust side air bearings 43e and 43f is provided. After passing through the inside, the upper and lower thrusts 41 and 42 collide with the lower surface of the upper surface. In this case, the rotary shaft guide body 43a slides finely in the axial direction with respect to the upper rotary shaft 21 constituting the rotary shaft 20 by the force of air collided with the upper and lower thrusts 41 and 42. The fine gap is maintained between the upper surface of the thrust side air bearing 43e and the lower surface of the upper thrust 41, and the fine gap is maintained between the lower surface of the lower thrust side air bearing 43f and the upper surface of the lower thrust 42. will be.

Accordingly, an air layer is formed between the upper surface of the upper thrust side air bearing 43e and the lower surface of the upper thrust 41 and the lower surface of the lower thrust side air bearing 43f and the upper surface of the lower thrust 42. Is formed so that the upper and lower thrust (41, 42) with the rotating shaft 20 can be smoothly rotated at high speed.

On the other hand, since the upper surface of the upper journal side air bearing 43c and the lower surface of the lower journal side air bearing 43c described above also form fine gaps with the upper and lower thrusts 41 and 42, compressed air is also used as the fine gaps. The air layer is formed by the supply of.

The air of the air layer formed as described above moves to a minute gap between the inner circumferential surface of the journal side air bearing 43c and the outer circumferential surface of the upper rotating shaft 21 constituting the rotating shaft 20, and then through the compressed air exhaust port 51. Exhausted.

As described above, when the rotor 12 is rotated at high speed by applying power to the driving motor 10, the rotation shaft 20 receiving the rotational force of the rotor 12 acts as the aforementioned shaft support means 40. It is possible to rotate at high speed.

Here, the drive motor 10 applied to the present invention, when the stator 11 uses a high frequency motor stator, and the rotor 12 applies a high frequency motor rotor type, the rotation shaft 20 is 6,000 RPM ~ 24,000. RPM can be rotated at high speed.

In addition, the present invention is rotatably supported in the journal direction, the thrust direction of the rotary shaft 20, and unlike the prior art, because the air bearing is used without using a ball bearing, the rotary shaft 20 can be rotated at high speed without difficulty for a long time. It becomes possible.

In addition, the air bearing applied to the present invention has an advantage that the device can be used semi-permanently because its service life is very long, unlike the conventional ball bearing.

Therefore, the present invention can rotate the rotating shaft 20 at high speed, it is possible to spray the liquid supplied from the outside in the form of fine particles through the injection means (30).

On the other hand, the injection means 30, the lower plate 31 is coupled to the outer peripheral surface of the rotary shaft 20 forcibly; It is disposed to surround the rotating shaft 20 at a position spaced apart from the lower plate 31 by a predetermined interval in the upward direction, the liquid injection hole (32a) in the center so that the inner peripheral surface is formed a constant gap with the outer surface of the rotating shaft 20 An upper plate 32 formed; The plurality of upper and lower plates 32, 31 are arranged in a plurality of edges corresponding to each other, the upper end is connected to the upper plate 32, the lower end is connected to the lower plate 32 is installed, the upper The liquid introduced into the liquid input hole (31a) of the plate 32 is made to collide, it is made of a column member 33 to be injected in a fine particle state.

Here, the liquid refers to the slaked lime (Ca (OH) ₂ ) used for the desulfurization reaction in a semi-dry reactor (Semi-Drier Reator) or to be used to produce ceramics, foods, and medicines, which will be described below. The liquid is supplied through the liquid supply pipe 80 formed in the bottom plate 61b constituting the protective case 61, but the liquid is not necessarily limited thereto, and the liquid is supplied to the liquid input hole 32a of the upper plate 32 through other paths. Of course you can put.

On the other hand, the present invention is a drive motor mounting plate (60) for installing the drive motor 10 is located above the shaft support means (40); The first protective case is installed in the drive motor mounting plate 60 to be installed in a downward direction so that the shaft support means 40 is built in and protected from the outside, and the side protection plate 61a and the bottom plate 61b. 61); A bracket 62 installed on the side wall plate 61a of the first protective case 61 and coupled to the chamber; The upper end is connected to the lower surface of the bracket 62 so that the first protective case 61 except for the injection means 30 and the rotating shaft 20 protruding from the first protective case 61 are embedded so as to be externally installed. It may further include a second protective case 63 for protecting from.

That is, as described above, the reason for having the first and second protective cases 63 is that when the internal temperature of the chamber in which the automator of the present invention is installed is a high temperature, the automation component is deteriorated from the high temperature heat. This is to prevent it from happening.

On the other hand, the present invention, when the internal temperature of the chamber in which the atomizer is installed is a high temperature, in order to prevent deterioration from the heat of high temperature to form a cooling water inlet (62a) on one side of the bracket 62, the other side Cooling water outlet (62b) is formed, the coolant flowing through the cooling water inlet (62a) flows through the space between the second protective case 63 and the first protective case 61 to the cooling water outlet (62b) To be discharged through.

In addition, the present invention is provided with a tapered surface for installing the injection means 30 spaced apart from the lower surface of the second protective case 63 by a minute interval, and guides air downward to the lower edge of the second protective case 63 ( The air supply pipe 90 formed in the bottom plate 61b constituting the first protective case 61 is spaced between the injection means 30 and the second protective case 63 by forming a 63a). By supplying a to form a conical air curtain by the air flowing along the tapered surface (63a), the injection direction guide to induce the fine particles injected by the injection means 30 to be injected while spreading downward Means may be provided.

Here, the air supply pipe 90 formed in the bottom plate 61b constituting the first protective case 61, but is not necessarily limited to this through the injection means 30 and the second protective case through other paths Of course, the air can be supplied to the space between the (63).

So far, the configuration of the preferred rotary automatizer of the present invention has been described.

Hereinafter, a description will be given of a protection system for protecting an air bearing in an emergency situation in which compressed air is not supplied in the basic configuration of the rotary automatizer according to the present invention, that is, the configuration of the rotary automatizer according to claim 1. Shall be. However, the protection system according to the present invention is not necessarily limited to claim 1, but it is found that the protection system can be applied to the entire configuration of the rotary atomizer implemented in the present invention.

The protection system of the air bearing according to the present invention, when an emergency situation in which compressed air is not supplied or supplied below a set amount occurs, the journal side air bearing 43c and the upper and lower thrust side air bearings 43e and 43f. No more air is supplied or below the set point.

In this case, a fine gap is formed between the upper surface of the upper thrust side air bearing 43e and the lower surface of the upper thrust 41 and between the lower surface of the lower thrust side air bearing 43f and the upper surface of the lower thrust 42. Unlike when compressed air is supplied, the rotating shaft guide body 43a is lowered due to its own weight, so that the entire lower thrust side air bearing 43f and the lower side of the lower journal side air bearing 43c have a portion of the lower thrust 42. It is rubbed on the upper surface, resulting in a problem that the lower thrust side air bearing 43f and the lower journal side air bearing 43c are damaged or worn.

Therefore, the present invention is for the protection of such an air bearing, the compressed air supply means for supplying compressed air to the compressed air inlet (50); A detection sensor 110 for sensing a flow amount of the compressed air supplied by the compressed air supply means 100; A compressed air storage tank 120 connected to the compressed air inlet 50 and to which an electromagnetic on / off valve 121 is attached; The flow rate of the compressed air supplied from the compressed air supply means 100 detected by the detection sensor 110 to determine that the compressed air in the compressed air storage tank 120 flows into the compressed air inlet 50 is less than or equal to the set value. In this case, the electronic control valve 130 includes a control means 130 for controlling the opening.

Here, the compressed air is stored in the compressed air storage tank 120, and the air filled in the storage tank 120 is opened by the pressure of the compressed air inlet 50 by the pressure of the naturally open and closed valve 121 is opened. ) And instead of the upper and lower thrust air bearings 43f between the upper surface of the upper thrust side air bearing 43e and the lower surface of the upper thrust 41 under the same conditions as the supply of normal compressed air. An air layer is formed in a minute gap between the upper surfaces of the thrusts 42.

On the other hand, the present invention further comprises an emergency bell 140 which is operated when the amount of compressed air supplied from the compressed air supply means 100 by the control means 130 is less than the set value, the operator recognizes as sound I could do it.

In this way, the operator can immediately stop the driving of the drive motor 10, thereby preventing further wear or damage of the air bearing.

On the other hand, the present invention, as described above, the operator does not manually stop the driving of the drive motor 10, the flow amount of the compressed air supplied to the compressed air supply means 100 by the control means 130 If it is determined to be less than or equal to the set value, in the process of opening the electromagnetic on-off valve 121 so that the air in the compressed air storage tank 120 is introduced into the compressed air inlet 50, using the inverter 150 Thus, the speed of the rotor 12 of the drive motor 10 may be gradually reduced.

As described above, according to the present invention, by simply manufacturing the structure to reduce the manufacturing cost, by using the air bearing to reduce the maintenance cost and to enable high-speed rotation, compressed air is stopped in the emergency By temporarily supplying air, it is possible to prevent damage to the air bearing, thereby improving the stability and durability of the entire system.

Claims (9)

A drive motor 10 including a stator 11 and a rotor 12; A rotating shaft 20 which is rotated by receiving the rotational force of the rotor 12 and is installed in a vertical direction; An injection means (30) installed at a lower end of the rotary shaft (20) to inject a liquid supplied from the outside into a fine particle state; In the rotary automator comprising a shaft support means 40 for rotatably supporting the rotary shaft 20 while connecting the upper end of the rotary shaft 20 and the rotor 12 so as to transmit power, The shaft support means 40 is connected to the upper end of the rotating shaft 20 and the rotor 12, the upper thrust 41 for transmitting the rotational force of the rotor 12 so that the rotating shaft 20 is rotated Wow; A lower thrust 42 fixedly installed on the rotation shaft 20 spaced apart from the upper thrust 41 by a predetermined distance; The journal is installed vertically on the entire inner surface of the rotating shaft guide body 43a and the mounting hole 43b vertically penetrated in the center of the rotating shaft guide body 43a to form the supporting shaft 43d vertically in the center. Upper and lower yaw formed in the side air bearing 43c and the upper and lower surfaces of the rotary shaft guide body 43a in correspondence with the lower surface and the upper surface of the upper and lower thrust parts 41 and 42 at the outer portion of the axial rotation supporting hole 43d. It is provided with upper and lower thrust side air bearings 43e and 43f respectively provided in the mouth space portion, and a rotation shaft 20 corresponding to the upper and lower thrust parts 41 and 42 can rotate in the axial rotation support hole 43d. Rotation shaft guide means 43 which is inserted in order to be installed and is movable up and down with respect to the rotary shaft 29 corresponding to the upper and lower thrust (41, 42); Compressed air inlets 50 formed on the outer side of the rotating shaft guide body 43a to allow compressed air to flow into the journal side air bearing 43c and the upper and lower thrust side air bearings 43e and 43f, respectively, and the journal. And a compressed air inlet / exhaust means comprising a compressed air exhaust port 51 through which the compressed air introduced into the side air bearing 43c and the upper and lower thrust side air bearings 43e and 43f is exhausted. Automator. The method of claim 1, And the journal side air bearing (43c) and the upper and lower thrust side air bearings (43e) (43f) selectively use any one of an orifice structure bearing, a carbon bearing, and a ceramic bear. The method of claim 1, The injection means 30, A lower plate 31 coupled to the outer circumferential surface of the rotary shaft 20 by interference; It is disposed to surround the rotating shaft 20 at a position spaced apart from the lower plate 31 by a predetermined interval in the upward direction, the liquid injection hole (32a) in the center so that the inner peripheral surface is formed a constant gap with the outer surface of the rotating shaft 20 An upper plate 32 formed; The plurality of upper and lower plates 32, 31 are arranged in a plurality of edges corresponding to each other, the upper end is connected to the upper plate 32, the lower end is connected to the lower plate 32 is installed, the upper Rotary atomizer, characterized in that consisting of a column member (33) to be injected into the fine particle state by causing the liquid introduced into the liquid input hole (31a) of the plate 32 to collide. The method of claim 1, A drive motor mounting plate (60) positioned above the shaft support means (40) to install the drive motor (10); The first protective case is installed in the drive motor mounting plate 60 to be installed in a downward direction so that the shaft support means 40 is built in and protected from the outside, and the side protection plate 61a and the bottom plate 61b. 61); A bracket 62 installed on the side wall plate 61a of the first protective case 61 and coupled to the chamber; The upper end is connected to the lower surface of the bracket 62 so that the first protective case 61 except for the injection means 30 and the rotating shaft 20 protruding from the first protective case 61 are embedded so as to be externally installed. Rotary automator, characterized in that it further comprises a second protective case (63) for protection from. The method of claim 4, wherein Cooling water inlet 62a is formed at one side of the bracket 62, and a cooling water outlet 62b is formed at the other side, and the cooling water introduced through the cooling water inlet 62a is formed of the second protective case 63 and the second. 1 Rotary automator, characterized in that the flow through the space between the protective case 61 is discharged through the cooling water outlet (62b). The method according to claim 4 or 5, The injection means 30 is installed to be spaced apart from the lower surface of the second protective case 63 by a minute interval, and a tapered surface 63a for guiding air downward on the lower edge of the second protective case 63 is formed. By supplying air into the space between the injection means 30 and the second protective case 63 to form a conical air curtain by the air flowing along the tapered surface (63a), the injection means 30 Rotary atomizer characterized in that it comprises a jet direction guide means for guiding the fine particles to be injected by spraying downward while spreading. A drive motor 10 including a stator 11 and a rotor 12; A rotating shaft 20 which is rotated by receiving the rotational force of the rotor 12 and is installed in a vertical direction; An injection means (30) installed at a lower end of the rotary shaft (20) to inject a liquid supplied from the outside into a fine particle state; It includes a shaft support means 40 for connecting the upper end of the rotary shaft 20 and the rotor 12 so as to transmit power and rotatably support the rotary shaft 20, the shaft support means 40 ) Is an upper thrust 41 connecting the upper end of the rotating shaft 20 and the rotor 12 to transmit the rotational force of the rotor 12 so that the rotating shaft 20 is rotated; A lower thrust 42 fixedly installed on the rotation shaft 20 spaced apart from the upper thrust 41 by a predetermined distance; The journal is installed vertically on the entire inner surface of the rotating shaft guide body 43a and the mounting hole 43b vertically penetrated in the center of the rotating shaft guide body 43a to form the supporting shaft 43d vertically in the center. Upper and lower yaw formed in the side air bearing 43c and the upper and lower surfaces of the rotary shaft guide body 43a in correspondence with the lower surface and the upper surface of the upper and lower thrust parts 41 and 42 at the outer portion of the axial rotation supporting hole 43d. It is provided with upper and lower thrust side air bearings 43e and 43f respectively provided in the mouth space portion, and a rotation shaft 20 corresponding to the upper and lower thrust parts 41 and 42 can rotate in the axial rotation support hole 43d. Rotation shaft guide means 43 which is inserted in order to be installed and is movable up and down with respect to the rotary shaft 29 corresponding to the upper and lower thrust (41, 42); Compressed air inlets 50 formed on the outer side of the rotating shaft guide body 43a to allow compressed air to flow into the journal side air bearing 43c and the upper and lower thrust side air bearings 43e and 43f, respectively, and the journal. Compressed air inlet / exhaust means consisting of a compressed air exhaust port 51 for exhausting the compressed air introduced into the side air bearing 43c and the upper and lower thrust side air bearings 43e and 43f, Compressed air supply means (100) for supplying compressed air to the compressed air inlet (50); A detection sensor 110 for sensing a flow amount of the compressed air supplied by the compressed air supply means 100; A compressed air storage tank 120 connected to the compressed air inlet 50 and to which an electromagnetic on / off valve 121 is attached; The flow rate of the compressed air supplied from the compressed air supply means 100 detected by the detection sensor 110 to determine that the compressed air in the compressed air storage tank 120 flows into the compressed air inlet 50 is less than or equal to the set value. The air bearing protection system of the rotary automatizer, characterized in that it comprises a control means for controlling the opening and closing of the solenoid valve 121. According to claim 7, wherein the control means 130 is further provided with an emergency bell 140 which is operated when the flow rate of the compressed air supplied from the compressed air supply means 100 is less than the set value, the operator by the sound Rotary automated air bearing protection system characterized by recognition. According to claim 7, When the flow rate of the compressed air supplied to the compressed air supply means 100 by the control means 130 is determined to be less than the set value, by opening the electromagnetic on-off valve 121 to store the compressed air In the process of allowing air in the tank 120 to flow into the compressed air inlet 50, the speed of the rotor 12 of the drive motor 10 is gradually reduced by using the inverter 150. Rotary bearing air bearing protection system.

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