KR100402909B1 - Blower - Google Patents

Abstract

The present invention relates to a blower capable of increasing air volume and air pressure by forming an oil film between a housing constituting the blower body and an impeller rotating inside the housing to impart gas to prevent friction and noise.

Such blowers include a base; A motor fixed to the base and serving as a driving source for receiving power; A housing fixedly installed at the base, the inlet and the outlet having an interior space; An impeller rotatably installed in the housing and configured to suck air into the intake port while rotating by the driving force of the motor and discharge the air to the exhaust port to have a predetermined pressure; An air chamber for temporarily storing compressed air discharged to the exhaust port and discharging the compressed air to the outside; It provides a blower including a nozzle for supplying oil into the housing due to the pressure difference generated when the impeller rotates.

The base is formed as a space so that the oil can be contained, the base and the nozzle is connected to the pipeline and the pressure difference between the inlet and exhaust ports generated by the rotating impeller in the housing to continuously supply the oil of the base into the housing It is characterized in that it is made to be.

The nozzle is characterized by consisting of a drop nozzle so that the oil supplied to the housing is not excessively introduced.

Description

Blower {BLOWER}

The present invention relates to a blower, and more particularly, an oil film is formed between a housing constituting the blower body and an impeller that rotates inside the housing and pressurizes gas to generate compressed air, thereby preventing friction and noise, thereby increasing sealing force. It is related with the blower which can increase an air volume and a wind pressure.

In general, the blower (blower) is a gas blower by the rotational movement of the rotor blades or rotor, the pressure ratio refers to the discharge pressure blower of 1.1 or more and less than 2.0 or 1,000mmAg ~ 1kgf / ㎠.

Such blowers are used to supply gas of a predetermined pressure to a predetermined position, for example, to supply oxygen required for breeding modes such as environmental wastewater treatment facilities and septic tanks, fish farms, bubble generators for bathrooms, and sprayers for combustors. It is used for such.

Conventional blowers used for this purpose include a motor which is a driving source, a housing having a constant internal space having an inlet and an exhaust port, and housed in the housing to be rotated by the driving of the motor, and a plurality of rotary blades at the outer periphery thereof. And an air chamber connected to the exhaust port of the housing.

When the blower is rotated, the blower receives the driving force of the motor, and the impeller rotates inside the housing, and the rotary blade mounted on the impeller sucks air at the inlet side, compresses it to a predetermined pressure, and discharges it to the exhaust port. The air exhausted through the exhaust port is introduced into the air chamber, and then compressed air of a predetermined pressure is discharged to the outside through the outlet connected to the air chamber to perform a necessary function.

However, in the conventional blower, the impeller rotates at a high speed of about 1100 to 1800 revolutions per minute inside the housing. At this time, rotary blades disposed at regular intervals along the outer periphery of the impeller rotate while contacting the inner wall of the housing. Because of this, there is a problem that occurs noise, vibration and overheating.

In order to solve this problem, the impeller's rotary blade can be manufactured to have a slightly shorter structure so that it does not come into contact with the inner wall of the housing. There is a lesser problem.

In order to solve the above problems, when the blower is operated at high speed, the noise efficiency increases and the energy efficiency decreases.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems as described above, and an object of the present invention is the rotation of the impeller to generate compressed air by sucking and compressing the gas while rotating in the housing and the housing constituting the blower body By forming an oil film between the wings to prevent friction and noise while providing a blower that can increase the air volume and wind pressure by increasing the sealing force.

In order to realize the object of the present invention as described above, the base; A motor fixed to the base and serving as a driving source for receiving power; A housing fixedly installed at the base, the inlet and the outlet having an interior space; An impeller rotatably installed in the housing and configured to suck air into the intake port while rotating by the driving force of the motor and discharge the air to the exhaust port to have a predetermined pressure; An air chamber for temporarily storing compressed air discharged to the exhaust port and discharging the compressed air to the outside; It provides a blower including a nozzle for supplying oil into the housing due to the pressure difference generated when the impeller rotates.

The base is formed as a space so that the oil can be contained, the base and the nozzle is connected to the pipeline and the pressure difference between the inlet and exhaust ports generated by the rotating impeller in the housing to continuously supply the oil of the base into the housing It is characterized by being made so that.

The nozzle is characterized by consisting of a drop nozzle so that the oil supplied to the housing is not excessively introduced.

1 is a perspective view of a part of the blower according to the present invention separated.

2 is a front view of FIG. 1;

3 is a side view of FIG. 1;

Figure 4 is a cross-sectional view of the use state of the blower according to the present invention.

5 is a partially enlarged cross-sectional view illustrating a process of generating compressed air in a blower according to the present invention.

Figure 6 is an enlarged cross-sectional view of a nozzle applied to the blower of the present invention.

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

1 is a perspective view of a part of the blower according to the present invention separated, Figure 2 and 3 is a front view and a side view of Figure 1, the blower according to the present invention is the base 2 and the base 2 A motor 4, which is fixedly installed and driven and driven by a power source, a cylindrical housing 6 fixedly installed at the base 2, having an intake port and an exhaust port, and having a space portion therein, and inside the housing 6; It is rotatably installed in the air and the driving force of the motor (4) is rotated while sucking the air through the intake port, the impeller (8) for compressing and exhausting the compressed air through the exhaust port, and connected to the exhaust port of the housing (6) And temporarily store the compressed air at a predetermined pressure and then discharge it to the outside.

The base 2 has a predetermined height and width, and the inside thereof is formed as a space part to contain a certain amount of lubricating oil O, as shown in FIG. 4, and checks the amount of this lubricating oil O from the outside. The oil gauge 12 is installed on one side of the upper part of the base 2 so as to be able to do so.

As shown in FIG. 3, the rotating shaft 14 protrudes from the motor 4, and the driving pulley 16 transmits the rotating force of the motor 4 to the impeller 8. Is combined.

As shown in FIGS. 4 and 5, an inlet 18 is formed in the housing 6 to allow the outside air to be sucked into the housing 6, and an exhaust port through which the sucked outside air is compressed and discharged to the outside of the housing 6. 20) is formed.

An air filter 22 is installed at the front end of the inlet port 18 so as to filter out impurities such as dust contained in the air sucked into the housing 6, and the end of the exhaust port 20 is connected to the air chamber 10. It is connected to make it through.

The impeller 8 is radially inserted along a rotation shaft 26 having a driven pulley 24 formed at one end thereof, a rotor 28 formed at an outer periphery of the rotation shaft 26, and an outer circumferential surface of the rotor 28. It includes a plurality of rotary blades 30.

The rotary blades 30 are inserted into the grooves 32 formed in the rotor 28 substantially as shown in FIG. 5, wherein the rotary blades 30 are rotated by the centrifugal force during the rotation of the rotor 28. It is installed to be movable toward the inner wall of the to increase the air volume by increasing the sealing force.

The driven pulley 24 is connected to the drive pulley 16 formed on the motor 4 and the belt 34, and the rotating shaft 26 has the housings 6 with the bearings 36a and 36b fitted to both sides. Are rotatably supported by side plates 40a and 40b respectively fixed by fixing members 38a and 38b, such as bolts, on both sides thereof.

The side plate 40a has a groove 42 formed therein so that the bearing 36a can be inserted therein, and the rotation shaft 26 penetrates through the center portion of the other side plate 40b so as to protrude outward. 44 is open.

The side plates 40a and 40b are to be assembled while the housing 6 is completely sealed. For this purpose, an O-ring 46 is installed at one side of the housing 6 to which one side plate 40a is coupled. The oil chamber 48 is fitted into the hole 44 of the other side plate 40b through which the rotating shaft 26 penetrates, so that the sealing force of the housing 6 can be maintained.

The impeller 8 installed in the housing 6 is installed slightly eccentrically toward the exhaust port 20 as shown in FIG. 5, that is, the space inside the housing 6 is based on the rotation center of the impeller 6. The exhaust port 20 side is formed smaller than the (18) side so that the air sucked into the intake port 18 can be compressed while being transported toward the exhaust port 20.

Substantially, the rotary blade 30 of the impeller 8 is rotated in close contact with the inner wall of the housing 6 by centrifugal force. When the impeller 8 rotates, the inner wall of the impeller 8 and the rotary blade ( 30) As a means for forming an oil film between the ends to reduce the rotational friction and further increase the sealing force, to supply the lubricating oil (O) into the housing (6) in the portion adjacent to the inlet port (18) of the housing (6) Nozzle 50 for is installed.

The nozzle 50 is connected to the base 2 and the connecting pipe 52 through the pressure difference between the intake port 18 and the exhaust port 20 in the housing 6 during the rotation of the impeller 8. The oil O contained in (2) can be supplied into the housing 6 via the connection pipe 52 and the nozzle 50.

When the oil O of the base 2 is supplied to the housing 6, an oil filter 54 is installed inside the base 2 so that foreign substances contained in the oil O can be filtered out.

As shown in FIGS. 6A and 6B, the nozzle 50 according to the present exemplary embodiment includes a connecting portion 56 formed to be connected to the connecting pipe line 52, and the inside of the nozzle 50 is coupled to the housing 6. A case 58 having a threaded portion 57 formed on the lower outer periphery of the lower portion, a cylindrical tube 59 assembled in the case 58 by a force fitting method, and positioned inside the tube 59. Has an oil flow member 60 formed therein, and has an adjustment member 62 which is screwed to be movable in the threaded portion of the oil flow member 60.

The sleeve 61 is fitted to the outer circumference of the upper side of the adjusting member 62, and the pressing plate 64 is positioned between the sleeve 61 and the case 58 and pressed by the elastic member 66.

The connecting portion 56 is formed so as to communicate with the inner space of the connection pipe 52 and the case 58, the hole 68 is drilled therein, and is supplied to the case 58 through the connecting portion 56 In order to prevent the oil O from leaking to the outside, a packing 70 is installed at an upper outer side of the case 58, and the pressure plate 64 is chamfered 65 at a position corresponding to the hole 68. Is formed.

The case 58, the tube 59, and the oil flow member 60 are made of a transparent material so that the oil O is supplied to the housing 6 through the nozzle 50 from the outside.

The nozzle 50 according to the present embodiment is formed as a drop nozzle to drop the oil O supplied to the housing 6 drop by drop through the oil flow member 60 in which the spiral screw part is formed. ) Is not excessively supplied to the housing (6).

If the oil is excessively supplied into the housing, for example, it is formed by a nozzle that is commonly used, the impeller receives much rotational resistance due to the oil, thereby degrading the performance and efficiency of the blower. Use of a nozzle can prevent such occurrences.

This drop nozzle is configured to adjust the amount of oil (O) supplied to the housing 6 by moving the adjusting member 62 screwed to the oil flow member 60 up and down, the adjusting member 62 To the upper side by using a driver or the like, the oil (O) receives less resistance of the oil flow member (6) and the oil (O) is supplied more. On the contrary, when the adjusting member (62) is moved downward, the oil (O) ) Is formed to receive a lot of resistance of the oil flow member 6 so that the oil (O) is supplied less.

6B shows that the oil O is supplied to the housing 6 through the drop nozzle 50. When air is sucked into the inlet 18 by the rotation of the impeller 8, as shown in FIG. The pressure of the intake port 18 portion inside the housing 6 is lowered. At this time, the oil O of the base 2 flows into the connecting portion 56 through the connecting pipe 52, and the pressure of the oil O flows into the connecting portion 56. The pressure plate 64 is pushed upwards to supply the oil O to the adjusting member 62. The oil O moves downward along the helical threaded portion of the oil flow member 60 to move the inside of the housing 6. Is supplied.

When the rotating impeller 8 is stopped, the pressure inside the housing 6 is equal to atmospheric pressure, and the pressure plate 64, which has been raised, returns to the elasticity of the elastic member 66, and the supply of oil O is stopped.

On the other hand, the air chamber 10 has a discharge port 72 installed through the outside from the inside, the filter 74 for filtering the oil contained in the compressed air discharged installed in the air chamber 10 and Is installed outside the air chamber 10 has a pressure gauge 76 and a safety valve 78 to check the internal pressure of the air chamber 10.

An oil recovery pipe 80 is installed at the lower portion of the air chamber 10 so that the oil filtered by the filter 74 can be recovered to the base 2, and the oil recovery pipe 80 is connected to the base 2. do.

A valve 82 is coupled to an end of the outlet 72, and an extension pipe 84 is connected to the valve 82 so that the compressed air of the air chamber 10 can be discharged to the outside of the blower.

4 is a state diagram of the use of the blower of the present invention as described above, when power is first supplied to the motor 4, the rotating shaft 14 of the motor 4 is rotated in the clockwise direction as shown in the drawing and the driving pulley 16 ) Rotates, the driving force is transmitted to the driven pulley 24 connected to the drive pulley 16 and the belt 34 so that the impeller 8 rotates inside the housing 6.

As the impeller 8 rotates, as shown in FIG. 5, outside air is filtered through the air filter 22, and impurities such as dust are sucked into the housing 6 through the intake port 18, and then compressed to a constant pressure. To the exhaust port 20 to generate compressed air.

In more detail, first, as shown in FIG. 5A, as the impeller 8 rotates, a certain amount of air A is sucked into the housing 6 through the inlet port 18 by the suction force thereof.

At this time, the air (A) is sucked in and the pressure difference between the inlet port 18 and the exhaust port 20 is generated, which causes the lubricating oil (O) contained in the base (2) through the connection pipe 52 to the nozzle 50 It is supplied into the housing 6 through.

The oil O supplied to the housing 6 is sprayed onto the inner wall of the housing 6 by the rotation of the rotary blade 30 of the impeller 8 to form an oil film OF on the inner wall thereof. The oil film OF is lubricated to prevent friction and noise during rotation of the impeller 6.

When the impeller 8 is further rotated as shown in FIG. 5B while the air A is sucked into the housing 6 as described above, the rotary blade 30 is pushed outward from the groove 32 by centrifugal force, and its end portion thereof is pushed out. Since the housing 6 rotates in a state of being in close contact with the inner wall, the sucked air A is transported in a state trapped between the rotor 28 and the rotor blades 30, and the housing A Since the cross-sectional area of 6) gradually decreases toward the exhaust port 20, the air A is compressed.

During this action, since the oil film OF is formed on the inner wall of the housing 6, the gap between the housing 6 and the rotary blade 30 is eliminated to increase the sealing force, thereby increasing the air volume and the wind pressure.

When the impeller 8 is further rotated while the air A is compressed, the compressed air A is exhausted to the air chamber 10 through the exhaust port 20 as shown in FIG. 5C.

At this time, the lubricating oil O together with the compressed air A is discharged to the air chamber 10. The lubricating oil O included in the compressed air A is filtered by the filter 74 and the bottom of the air chamber 10 is. After falling to the base, it is recovered to the base 2 through the oil recovery pipe (80), the compressed air (A) is discharged to the outside through the extension pipe path 84 through the discharge port (72).

The suction, compression, and discharge of the air A can be repeatedly performed several times in a short time by the impeller 8 rotating at a constant speed to generate compressed air.

When the power supplied to the motor 4 is turned off, the blower is stopped while the motor 4 is stopped rotating.

As described above, the blower according to the present invention forms an oil film between the housing and the impeller that rotates inside the housing to convey gas, thereby preventing friction and noise when the impeller rotates, and increasing the sealing force to increase the air flow rate and wind pressure. You can increase it.

In addition, the impeller can rotate without directly contacting the housing to maintain the durability of the blower, and excellent sealing force can exhibit a high efficiency even at low speed rotation of the impeller.

Claims (11)

(Correction) base; A motor fixed to the base and serving as a driving source for receiving power; A housing fixedly installed at the base, the inlet and the outlet having an interior space; An impeller rotatably installed in the housing and configured to suck air into the intake port while rotating by the driving force of the motor and discharge the air to the exhaust port to have a predetermined pressure; An air chamber for temporarily storing compressed air discharged to the exhaust port and discharging the compressed air to the outside; And a nozzle for supplying oil into the housing due to a pressure difference generated when the impeller rotates. The blower of claim 1, wherein the base is formed as a space so that oil can be contained therein, and the base and the nozzle are connected by a connecting pipe. The method of claim 1, wherein the oil supplied to the housing, so that the oil contained in the base can be continuously supplied into the housing through the connecting pipe and the nozzle due to the pressure difference between the inlet and exhaust ports generated while the impeller rotates inside the housing. Blower, characterized in that made. The blower as set forth in claim 3, wherein the nozzle is made of a drop nozzle so that the oil supplied to the housing is not excessively introduced. The method of claim 4, wherein the drop nozzle is provided with a connecting portion configured to be connected to the connecting pipe passage, the interior is made up of a space portion, one side is coupled to the housing, the tube is assembled in an interference fit inside the case, the tube It has an oil flow member formed in the threaded portion located in the inner side, characterized in that consisting of a control member screwed to the screw portion of the oil flow member, and a pressure plate for supplying or blocking the oil supplied through the connecting pipe to the oil flow member Blower. The blower of claim 5, wherein the case, the tube, and the oil flow member are made of a transparent material so that the oil is supplied to the housing through the nozzle. The blower of claim 4, wherein the drop nozzle is configured to adjust the amount of oil supplied to the housing by the adjustment of the adjustment member screwed to the oil flow member. The blower of claim 1, wherein the impeller is rotatably installed on the rotor such that the rotor blade is in close contact with the inner wall of the housing by centrifugal force during rotation of the impeller. The blower as set forth in claim 1, wherein the impeller has a space inside the housing smaller than the inlet side based on the rotational center of the impeller so that the air sucked into the inlet can be compressed while being transferred to the outlet side. . The blower of claim 1, wherein a filter for filtering oil contained in compressed air discharged through an exhaust port is installed in the air chamber. The blower as set forth in claim 1, wherein an oil recovery pipe is installed at a lower portion of the air chamber, and the oil recovery pipe is connected to a base.