KR200323344Y1 - Blower - Google Patents

Abstract

The present invention relates to a blower. The blower according to the present invention is a motor having a motor body and a rotating shaft rotating relative to the motor body, a casing having an inlet through which external gas can be introduced and an outlet through which internal gas can be discharged; The impeller and the casing and the motor main body are fixed to the rotating shaft of the motor to be discharged to the outlet by compressing the gas in the casing while being rotated together with the rotating shaft of the casing, and the casing and the motor And a blocking member disposed between the casing and the motor body to be fixed to the casing so as to prevent the gas leaked from the inside of the casing from contacting the motor body through a gap formed between the rotating shafts of the casing. have.

According to the blower according to the present invention, even when the gas in the casing leaks, it is possible to prevent the leaked gas in contact with the motor body to corrode the internal parts of the motor body and to accurately determine the replacement time of the sealing member. This increases the life and durability of the blower.

Description

Blower {Blower}

The present invention relates to a blower, and more particularly, to a blower that can increase the compression efficiency of the working gas at the same time to improve the life of the motor by blocking the contact of the blown gas and the motor.

If you use a vacuum cleaner to suck in dust, if you inject air into a fish farm, or if you cut a certain object using a high-pressure gas in an air knife system, There is a need for a device to inject, which is the blower used.

A conventional blower is generally composed of a motor 10, a casing 20 and an impeller 30, as shown in FIG.

The motor 10 is composed of a motor body 11 and the rotating shaft 12, the casing 20 is coupled by a screw 24 of the first member 21 and the second member 22. The motor body 11 is coupled to the casing 20 and the rotary shaft 12 is inserted into the casing 20 and coupled to the impeller 30 located in the casing 20.

When the motor 10 is operated, the impeller 30 rotates together with the rotation shaft 12, thereby compressing the gas flowing into the casing 20 through the inlet 23 provided in the casing 20, and thus the outlet port ( (Not shown).

The rotation shaft 12 of the motor is inserted into the casing 20, and a gap 90 is formed between the rotation shaft 12 of the motor and the casing 20, as shown in FIG. 1.

In general, since the casing 20 is made of a material such as aluminum and the rotation shaft 12 of the motor is also made of a material such as steel, if there is no gap 90, the rotating shaft 12 and the casing 20 If they are in contact with each other, the device is damaged by the friction between each other during the rotation of the rotary shaft 12.

However, if the gap 90 is not blocked, the gas in the casing 20 flows out through the gap 90 to reduce the compression efficiency of the blower, and also flows into the motor body 11 to allow the motor to flow into the motor. It will have a bad influence, such as corroding the apparatus of (10). For this reason, in the blower, the gap 90 is sealed by the sealing member 50 to prevent the outflow of gas in the casing 20.

However, when the blower is used for a long time, the gap 90 may not be closed so that the sealing member 50 is damaged due to chemical action of gas in the casing 20 or friction with the rotating shaft 12 of the motor. Occurs. In this case, the leaked gas is in direct contact with the motor body 11. That is, since the rotating shaft 12 of the motor is connected to the inside of the motor body 11, the leaked gas is introduced into the motor body 11 along the rotating shaft 12 to the inside of the motor body 11 Corrosion of parts

In addition, since the motor body 11 and the casing 20 are in close contact with each other, the user cannot easily check whether the sealing member 50 is damaged. If the fan is left in such a state for a long time, it is fatal to the motor. It may cause damage.

Thus, the conventional blower is the motor body of the gas in the casing 20 when the sealing member 50 for closing the gap 90 formed between the rotating shaft 12 and the casing 20 of the motor is damaged ( 20) to allow the inflow to the inside damages the motor 10, not only can not easily check whether the sealing member 50 is damaged, but also has a problem that lowers the compression efficiency of the blower.

The present invention is to solve the above problems, and even when the sealing member is damaged, not only can the gas in the casing prevent contact with the motor body, but also the user can easily determine whether the sealing member is damaged and its durability and The purpose is to provide a blower with increased compression efficiency.

1 is a schematic cross-sectional view of a conventional blower.

2 is a schematic cross-sectional view of a blower according to an embodiment of the present invention.

Figure 3 is a schematic perspective view of the blocking member shown in FIG.

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

1 ... blower 10 ... motor

11 ... motor body 12 ... motor shaft

20 ... Casing 21 ... First member

22 ... second member 23 ... inlet

24 ... screw 30 ... impeller

40 ... blocking member 41 ... blocking plate

42 ... Skirt 43 ... Outlet

44 ... shaft through hole 50 ... first sealing member

60 ... second sealing member 70 ... bearing

80 ... screw

90 ... clearance formed between casing and rotary shaft

Blower according to the present invention for achieving the above object, a motor having a motor body and a rotating shaft that rotates relative to the motor body, and an inlet through which the outside gas can be introduced and an outlet through which the gas inside can be discharged It has a casing, and the impeller and the casing and the motor main body is fixed to the rotating shaft of the motor so as to compress the gas in the casing and discharge to the outlet while being rotated together with the rotating shaft of the motor, And a blocking member disposed between the casing and the motor main body and fixed to the casing to prevent the gas leaked from the inside of the casing from contacting the motor main body through a gap formed between the casing and the rotating shaft of the motor. It is characterized by including made.

According to the present invention, it is preferable that Teflon is coated on the inner surface of the casing and the impeller so that the acid resistance and the water resistance of the inner surface of the casing and the impeller are increased.

In addition, according to the present invention, the blocking member, the blocking is located between the casing and the motor body to block the gas leaked from the inside of the casing contact with the motor body through a gap formed between the casing and the rotating shaft of the motor. A plate portion, a skirt portion extending from the outer edge of the blocking plate portion to the casing side and in contact with the casing; And a first sealing member for closing a gap between the casing and the rotating shaft of the motor, and a second sealing member for closing a gap between the rotating shaft of the motor and the blocking plate portion of the blocking member. It is preferable to further provide.

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

2 is a schematic cross-sectional view of a blower according to an embodiment of the present invention, Figure 3 is a perspective view of the blocking member shown in FIG.

The blower 1 which concerns on a present Example is comprised by the motor 10, the casing 20, the impeller 30, and the interruption | blocking member 40. As shown in FIG.

The motor 10 is composed of a motor body 11 and the rotating shaft 12. The rotary shaft 12 is coupled to the central portion of the motor main body 11 and when the power is applied to the motor main body 11, the rotary shaft 12 of the motor rotates.

The casing 20 is composed of a first member 21 and a second member 22 coupled to the first member 21 by screws 24.

When the first member 21 and the second member 22 are coupled to each other, a space surrounded by the first member 21 and the second member 22 is formed.

The casing 20 has an inlet 23 and the casing 20 through which external gas can flow into a space in the casing 20 formed by the first member 21 and the second member 22. Outlets (not shown) through which the gas inside can be discharged to the outside are respectively formed.

On the other hand, the first member 21 is provided with an insertion hole in the center portion so that the rotation shaft 12 of the motor can be inserted into the space in the casing (20). The rotary shaft 12 of the motor is inserted through the insertion hole. The diameter of the insertion hole should be larger than the diameter of the rotating shaft 12. If the diameter of the insertion hole and the diameter of the rotary shaft 12 are the same and closely adhered to each other, it is difficult because the inner peripheral surface of the insertion hole and the outer peripheral surface of the rotary shaft 12 are rubbed with each other and the blower is damaged when the rotary shaft 12 rotates.

When the rotation shaft 12 of the motor is inserted through the insertion hole, a gap 90 is formed between the inner circumferential surface of the insertion hole and the outer circumferential surface of the rotation shaft 12. The narrower the gap 90 is, the narrower the gap 90 is to reduce the amount of gas leaking through the gap 90. However, when the rotating shaft 12 of the motor rotates, the rotating shaft 12 may be shaken vertically or horizontally due to the vibration, so that the casing 20 when the rotating shaft 12 is rotated when the gap is too narrow. It is difficult because it is rubbing).

In order to prevent the gas in the casing 20 from leaking through the gap 90 and contacting the motor main body 11 to damage the motor 10, the first gap blocking the gap 90 is prevented. The sealing member 50 is provided.

Since the inner surface of the casing 20 is always in contact with the gas to be blown, it is easy to be damaged. For example, it is preferable to coat Teflon on the inner surface of the casing 20 in order to increase acid resistance and water resistance since it is easy to be corroded or damaged by acid when the gas being blown is an acid gas and water vapor when it is air.

The impeller 30 is located in the inner space of the casing 20. The impeller 30 is fixed to the rotation shaft 12 of the motor by a coupling means such as a key coupling, so that the impeller 30 also rotates when the motor 10 operates and the rotation shaft 12 rotates. The rotating shaft 12 is rotated together.

When an external gas flows into the casing 20 through an inlet 23 formed in the casing 20 when the impeller 30 rotates, the gas is rotated and compressed by the impeller 30. It is discharged to the outside through an outlet (not shown) formed in the casing 20.

Since the impeller 30 is always in contact with the gas being blown, it is easy to be damaged. For example, when the gas to be blown is acid gas, it is easy to be corroded or damaged by acid, and in the case of air, it is preferable to coat Teflon on the impeller 30 to increase acid resistance and water resistance.

The blocking member 40 is located between the motor body 11 and the casing 20, and is coupled to the rotation shaft 12 of the motor by a bearing 70 so as to be rotatable, and the blocking plate portion 41 ), A skirt portion 42 and an outlet hole 43 are provided.

In the present embodiment, the blocking plate portion 41 faces the casing 20 at a predetermined distance from each other, and the skirt portion 42 extends from the edge of the blocking plate portion 41 toward the casing 20 to be formed. It comes in contact with the casing 20. A shaft through hole 44 is formed at a central portion of the blocking plate part 41 to allow the rotating shaft 12 of the motor to pass therethrough. The rotating shaft 12 of the motor is sequentially formed through the shaft through hole of the blocking plate part 41. 44 is inserted into the casing 20 through an insertion hole formed in the first member 21.

The gas in the space formed by the casing 20 and the blocking member 40 is leaked through a gap formed between the rotating shaft 12 and the shaft through hole 44 formed in the blocking plate 41. In order to prevent the motor 10 from being damaged in contact with the main body 11, the second sealing member 60 is provided to block the gap.

The gas in the space formed by the blocking member 40 and the first member 21 is prevented from being leaked by the second sealing member 60 to prevent contact with the motor body 11.

The blocking member 40 is fixed to the motor body 11 together with the casing 20 by screws 80.

As described above, when the blocking member 40 is coupled between the motor body 11 and the casing 20, the first member 21, the blocking plate part 41, and the skirt part 42 are provided. Since the space surrounded by is formed, the space between the motor main body 11 and the casing 20 is separated by a predetermined distance by the blocking member 40.

An outlet hole 43 is formed in the skirt portion 42 so as to pass through the inner and outer circumferential surfaces of the skirt portion 42. Gas existing in the space formed by the casing 20 and the blocking member 40 may be discharged to the outside through the outlet hole 43.

Hereinafter will be described the operation and effect of the embodiment according to the present invention.

When a user applies power to operate the blower 1, the rotating shaft 12 of the motor rotates, and external gas flows into the casing 20 through an inlet 23 formed in the casing 20. It will flow in. The introduced gas is rotated in the casing 20 by the impeller 30 to be compressed, and the compressed gas is discharged to the outside through an outlet (not shown) formed in the casing 20 again. Since the gap 90 formed between the rotating shaft 12 and the casing 20 is blocked by the first sealing member 50, the gas is discharged to an outlet (not shown) through the inlet 23. Does not leak out of the casing 20. However, when the blower 1 is used for a long time, the first sealing member 50 may be damaged by acidic gas or toxic gas, or may be damaged by friction with the rotating shaft 12 of the motor. . When the first sealing member 50 is damaged in this way, the gap between the casing 20 and the rotating shaft 12 cannot be closed and the gas leaks through the gap 90.

However, in the blower according to the embodiment of the present invention, the blocking member 40 is coupled between the casing 20 and the motor body 11, so that the blocking member 40 may be leaked even when the gas is leaked. As a result, the gas may be prevented from directly contacting the motor main body 11. That is, when the first sealing member 50 is damaged and the gap 90 is not closed, the gas leaked through the gap 90 is formed by the blocking member 40 and the casing 20. It is only introduced into the gas leakage path of the gas can not be in contact with the motor body 11 located behind the blocking member (40). Therefore, the leaked gas is temporarily accommodated in the space formed by the casing 20 and the blocking member 40, and then is discharged to the outside through the outlet hole 43.

Therefore, in the blower 1 according to the embodiment of the present invention, the first sealing member 50, which blocks the gap 90 formed between the casing 20 and the rotating shaft 12 of the motor, is damaged. Even if gas inside the casing 20 leaks through the gap 90, the leaked gas is prevented from flowing into the motor main body 11 along the rotation shaft 12 of the motor. Therefore, even if the gas in the casing 20 leaks through the gap 90, it does not adversely affect the internal parts of the motor body 11 and the like, thereby increasing the durability and lifespan of the blower 1. Occurs.

On the other hand, when the first sealing member 50 is damaged and the gas is continuously leaked from the inside of the casing 20, when it is confirmed that the gas is discharged to the outside through the outlet hole 43, the user first It is easy to see that the sealing member 50 is damaged. Regarding whether the gas is discharged through the outlet hole 43, when the gas has an odor or color, it may be recognized through vision or smell. In addition, when the gas is discharged through the outlet hole 43, there is a rate of outflow, so if a thin and light paper is attached to the outlet hole 43, the attached paper or the like is shaken when the gas is leaked. It is possible to check whether the gas is leaked and the user can replace the first sealing member 50 at an appropriate time.

As described above, the blower according to the present invention can prevent the leaked gas from contacting the motor main body to corrode internal parts of the motor main body even when the gas in the casing leaks. It is possible to determine the effect of increasing the life and durability of the blower.

Claims (3)

A motor having a motor body and a rotating shaft rotating about the motor body; A casing having an inlet through which external gas can be introduced and an outlet through which internal gas can be discharged; An impeller fixed to the rotating shaft of the motor and positioned in the casing so as to rotate together with the rotating shaft of the motor to compress the gas in the casing and discharge the gas into the outlet; And The space between the casing and the motor body, and to prevent the gas leaked from the inside of the casing to contact the motor body through a gap formed between the casing and the rotating shaft of the motor, between the casing and the motor body. And a blocking member fixed to the casing and disposed in the blower. The method of claim 1, Blower, characterized in that the Teflon is coated on the inner surface and the impeller of the casing to increase the acid resistance and water resistance of the inner surface and the impeller. The method according to claim 1 or 2, The blocking member may include a blocking plate disposed between the casing and the motor main body to block the gas leaked from the inside of the casing from contacting the motor main body through a gap formed between the casing and the rotating shaft of the motor, and the blocking plate part. A skirt portion extending from the outer edge of the casing to the casing side and in contact with the casing; , And a first sealing member for closing the gap between the casing and the rotation shaft of the motor, and a second sealing member for closing the gap between the rotation shaft of the motor and the blocking plate portion of the blocking member. air blower.