JP3369453B2 - Compressed air generator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressed air generator for rotating an impeller in a casing so that air taken into the center of rotation of the impeller is taken out as compressed air from the outer peripheral side of the impeller. Regarding

[0002]

2. Description of the Related Art In the present manufacturing industry, an air-compressed power source is one of valuable power sources because it requires almost no post-treatment. There are various purposes of using compressed air, such as blowing, blowing, expanding, crushing, and cooling.

Since a large amount of electric power is consumed to produce compressed air, if the efficiency can be slightly increased, the energy saving is enormous.

Conventionally, there are a capacity compression method and a turbo method as a method for compressing gas. In the case of the volume compression method, the reciprocating type and the screw type are mainstream. In the capacity compression method, as indicated by the letters, compressed air is obtained by tightening the sealed space, which is a general air compression method.

In the case of the turbo system, a spiral impeller is rotated at an ultrahigh speed (40,000 rotations), and compressed air is generated on the blade surface in the rotation direction of the impeller by utilizing the inertial load of air. I'm trying to happen. At this time, the generated compressed air has a large kinetic energy in the circumferential direction, so that when the compressed air is pushed out from the impeller, the air is also compressed by colliding with the case of the impeller or the like. Specifically, the compression of air is, as shown in FIG. 11, hitting compression in which air is swept on the blade surface by several blades and collision compression by kinetic energy.

[0006]

However, in such a conventional compressed air generator of the volume compression type, in the screw type which is generally used, oil is used for the seal. In addition, there are problems such as mixing of oil into compressed air, management of oil, increase of power consumption at low load, and time required for restart. If oil is not used, sealing efficiency between rotors and ultra high speed rotation exceeding 10,000 rpm are required.

On the other hand, in the operation of air compression in a turbo compressor, it is difficult to make the compression process uniform on the blade surface, and a large amount of air flow causes the flow of turbulent flow, turbulent flow, back flow, etc. in the compression process. Avoid vibration and resonance. That is, it is necessary to give the impeller an ultra-high speed rotation, and in a region below the medium air volume, a surging phenomenon (turbulent flow, reverse flow, vibrations thereof, resonance) occurs and the compression action becomes unstable and control becomes difficult. It becomes difficult and there are practical problems. Also, in the compression stroke, it is functionally 80,000G.
The structure is expensive due to the fact that the air is hit with the above acceleration. Further, with the turbo type, it is difficult to reduce the size for the reasons described above, and only the large type exists in the market.

Generally, the compressed air generator can be applied from a small capacity to a large capacity, can be operated with high efficiency, is easy to operate and maintain, and can produce clean compressed air easily. In addition, it is desired that a general-purpose motor has a rotation speed and is easy to manufacture.

The present invention has been made by paying attention to such conventional problems, and uses a plurality of thin tube airways which are easy to manufacture, and utilizes the acceleration due to the centrifugal force generated in the rotating body to make each Uniform and stable compression process of air in the narrow airway can prevent the occurrence of surging phenomenon, consumable materials such as oil are not required and operating cost is reduced, and the structure is simple and manufacturing cost is reduced. It is an object of the present invention to provide a compressed air generating device that can be used.

[0010]

The gist of the present invention for solving the above problems resides in the inventions of the following items. [1] The impeller (30) is rotated in the casing (20) so that the air taken into the rotation center side of the impeller (30) is taken out as compressed air from the outer peripheral side of the impeller (30). In the compressed air generator, the impeller (3
0) has an inner peripheral surface (37), an outer peripheral surface (38), a side plate, and a capillary airway (33), and the inner peripheral surface (37) is
It is formed around the center of rotation of the impeller (30) and has airway inlets (32) located at equal intervals in the circumferential direction, and the outer peripheral surface (38) of the impeller (30) is It constitutes an outer peripheral surface (38) and has an airway outlet (34) corresponding to the airway inlet (32), and the side plates constitute both side surfaces of the impeller (30), The capillary airway (33) is connected to the airway inlet (32) and the airway outlet (3).
4) The compressed air generating device, which is in communication with 4) and extends spirally with the rotation center of the impeller (30) being concentric.

[2] The impeller (3) in the casing (20)
0) is rotated so that the air taken into the rotation center side of the impeller (30) is taken out as compressed air from the outer peripheral side of the impeller (30). Is an inner peripheral surface (37), an outer peripheral surface (38),
It has a side plate and a narrow tube airway (33), and the inner peripheral surface (37) is formed around the center of rotation of the impeller (30) and is arranged at substantially equal intervals in the circumferential direction, and the impeller. (3
0) has a plurality of airway inlets (32) located at substantially equal intervals in a direction parallel to the rotation axis direction of the outer peripheral surface (3).
8) constitutes the outer peripheral surface (38) of the impeller (30) and has a plurality of airway outlets (34) corresponding to the respective airway inlets (32), and the side plate is a blade. Car (3
0) which constitutes both side surfaces of the tubular airway (33).
Is the corresponding airway inlet (32) and airway outlet (34)
A compressed air generating device, which is in communication with and is spirally extended with the rotation center of the impeller (30) being concentric.

[3] The impeller (3
0) is rotated so that the air taken into the rotation center side of the impeller (30) is taken out as compressed air from the outer peripheral side of the impeller (30). Is an inner peripheral surface (37), an outer peripheral surface (38),
It has a side plate and an airway, and the inner peripheral surface (37) is formed around the center of rotation of the impeller (30) and has airway inlets (315) located at substantially equal intervals in the circumferential direction. The outer peripheral surface (38) constitutes the outer peripheral surface (38) of the impeller (30) and has an airway outlet (316) corresponding to the airway inlet (315). The side plates constitute both side surfaces of the impeller (30), and the airways are the airway inlet (315) and the airway outlet (316).
And an anterior chamber (310), a posterior chamber (311) and a tubular airway bundle, the anterior chamber (310) being
It is arranged on the side of the airway entrance (315) of the airway,
The rear chamber is arranged on the side of the airway outlet (316) of the airway, and the tubular airway bundle includes a plurality of tubular airways (3).
3), each of the capillary airways (33) communicates with the anterior chamber (310) and the posterior chamber (311), and is spirally formed with the rotation center of the impeller (30) being concentric. A compressed air generator characterized by being extended.

[4] The side plate is a flange (31L,
31R), and the flanges (31L, 31
R) extends in a direction radiating from the center of rotation of the impeller (30) with respect to the outer peripheral surface (38) of the impeller (30) and has a compressed air extraction passage (313). The compressed air extraction passageway (313) extends from the inner surface of the flange facing the outer peripheral surface (38) of the impeller (30) toward the outer surface of the flange opposite to the inner surface of the flange (30). The compressed air generating device according to [1], [2] or [3], wherein the compressed air generating device is inclined in the rotation direction.

[5] Inner peripheral surface (3) of the impeller (30)
7) has a slope portion, and the slope portion is inclined in the rotation direction of the impeller (30) with respect to the rotation center direction of the impeller (30), and the airway inlets (32, 315) are [1], [2], characterized in that it is opened on the slope
The compressed air generator according to [3] or [4].

Next, the operation of the invention described in each of the above items will be described.

In the compressed air generator according to the item [1], when the impeller (30) rotates in the casing (20), air is opened on the inner peripheral surface (37) of the impeller (30). Through the airway inlet (32) into the capillary airway (33). The air that has entered the narrow tube airway (33) is compressed and moves to the airway outlet (34) side opened on the outer peripheral surface (38) of the impeller (30), and eventually each airway outlet (34).
Side to the casing (20) side.

The air that has entered each capillary airway (33) is accelerated by the centrifugal force of the rotating impeller (30),
It is compressed uniformly and stably by the mass of air. In this way, the air is uniformly and stably compressed in each capillary airway (33),
Turbulence, backflow, their vibrations, and resonance are prevented from occurring.
At this time, the compressed state of the air in each thin tube airway (33) is not uniform, and varies depending on the conditions such as the position and shape of each thin tube airway (33).

In the compressed air generator according to the item [2], when the impeller (30) rotates in the casing (20), air is opened on the inner peripheral surface (37) of the impeller (30). Through the airway inlet (32) into the capillary airway (33). The air that has entered the narrow tube airway (33) is compressed and moves to the airway outlet (34) side opened on the outer peripheral surface (38) of the impeller (30), and eventually each airway outlet (34).
Side to the casing (20) side.

The respective airway inlets (32) are arranged at substantially equal intervals in the circumferential direction and at equal intervals in the direction parallel to the rotation axis direction of the impeller (30). Surface (3
7), and the airway outlet (34) corresponding to each airway inlet (32) is also opened on the outer peripheral surface (38), so that each airway inlet (32) and each airway outlet (34) communicate with each other. A large number of thin tube airways (33) can be provided, and a large number of thin tube airways (33) can efficiently compress a large amount of air.

In the compressed air generator according to the item [3], when the impeller (30) rotates in the casing (20), air is opened on the inner peripheral surface (37) of the impeller (30). Enter each airway through the airway entrance (315).

The air that has entered each airway is temporarily stored in the anterior chamber (31
0) and enter into each of the tubular airways (33) of the tubular airway bundle from the anterior chamber (310). The air that has entered the narrow tube airway (33) is compressed, and the compressed air flows out into the rear chamber (311) and is eventually discharged from the airway outlet (316) side to the casing (20) side.

That is, even when the opening area of the airway inlet (315) is increased and a large amount of air is taken in, a large amount of air is efficiently compressed in each thin tube airway (33) of the thin tube airway bundle. You can

In the compressed air generator according to the item [4], when the impeller (30) rotates in the casing (20), air passes through the airway inlets (32, 315) and inside the narrow tube airway (33). Enters and is compressed into the airway outlet (34, 31
It is discharged from the 6) side to the casing (20) side.

The compressed air passes through the airway outlets (34, 31).
When discharged from the 6) side to the casing (20) side, the compressed air passes through the compressed air extraction passage (313) of the flanges (31L, 31R). At this time, the compressed air take-out passage (313) is slanted toward the outer side in the rotation direction of the impeller (30).
When 0) rotates, the air that relatively moves along the inner circumference of the flange can be forcibly taken into the compressed air extraction passageway (313) and discharged to the casing (20) side.

In the compressed air generator according to the item [5], when the impeller (30) rotates in the casing (20), air is opened on the inner peripheral surface (37) of the impeller (30). Through the airway entrance (32, 315) of the
3) It enters inside, is compressed, moves to the airway outlet (34, 316) side, and is eventually discharged from each airway outlet (34, 316) side to the casing (20) side.

When air enters the airway entrance (32, 315), the inner peripheral surface (37) of the impeller (30) in which the airway entrance (32, 315) is opened is a sloped part, and the sloped surface Since the part is inclined in the rotation direction of the impeller (30) with respect to the rotation center direction of the impeller (30), the airway inlets (3, 315) are opened facing each other in the rotation direction, When the impeller (30) rotates, the air relatively moving along the inner peripheral surface (37) of the impeller (30) can be forcibly taken in.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment of the present invention. The compressed air generator comprises a filter 10, a casing 20, an impeller 30, a mechanical seal 40, and a motor 50.

The impeller 30 has an inner peripheral surface 37 which is a corrugated impeller airway inlet surface and an outer peripheral surface 38 which is also a corrugated impeller airway outlet surface. In each of the corrugated shapes, a high pressure portion and a low pressure portion are generated by the rotation of the impeller 30.

The airway inlet 32 is arranged at this high pressure portion. On the other hand, the airway outlet 34 is arranged in this low pressure portion. This makes it easier and more effective to take in and take out air from the impeller 30.

A compression function is provided by the wedge effect generated between the outer side surface of the impeller 30 having a corrugated shape and the inner side surface of the casing.

Flange 31R, 3 is provided at both ends of the impeller 30.
1L is attached. The flanges 31R and 31L prevent the high pressure portion and the low pressure portion from being mixed with each other, which are generated on the inner peripheral surface 37 and the outer peripheral surface 38 by the rotation of the impeller 30. Further, the flanges 31R and 31L have
Provide a key to take in air from the low pressure part.

On the outer peripheral surface 38, a cutout is provided in the high pressure portion so that air can be taken out only from the high pressure portion. The key is wedge-shaped or propeller-shaped to facilitate air intake and removal, and
It has a compression effect.

In FIG. 4, the filter 10 functions to remove dust in the air to be compressed, prevent clogging of the capillary airways, and obtain clean compressed air.

The casing 20 is an outer frame of the air compression device, and is provided with the filter 10 and the compressed air discharge port 2
2. Attach the mechanical seal 40 and store the impeller 30. The casing 20 is fixed to the base 21.

The mechanical seal 40 has a motor shaft 51.
And the casing 20, and between the impeller 30 and the casing 20, which are different in shape, separate atmospheric pressure from compressed air and suction air pressure from compressed air.

The motor 50 is an electric motor as a power source for air compression. The motor 50 has a motor shaft 5
1 and the impeller 30 is fixed to the motor shaft 51.

The configuration of each component will be described in more detail.

As shown in FIG. 4, the casing 20 is the outer frame of the air compression device, and accommodates the attachment port of the filter 10, the compressed air discharge port 32, the attachment of the mechanical seal 40, and the impeller 30.

The casing base 21 is fixed to the same foundation as the motor 50. The compressed air discharge ports 22 are provided on the left and right sides of the side surface of the casing 20. Further, a mechanical seal 40 is attached to the casing 20, and is located between the motor shaft 51 and the casing 20 and between the impeller 30 and the casing 20, although the shapes are different, but atmospheric pressure and compressed air, suction air pressure and compressed air. Isolate from the air.

FIG. 1 is a sectional view taken along the line I--I of FIG. 3, and FIG. 3 is a side view of the impeller.

As shown in FIGS. 1 and 3, the impeller 30
Is the impeller air inlet 35, airway inlet 32, capillary airway 3
3, an airway outlet 34, an inner peripheral surface 37, and an outer peripheral surface 38. A flange 31L and a flange 31R are attached to both sides of the impeller 30. On the flange 31L,
The motor shaft 51 is fixed, and the compressed air extraction passage 31
3. There are compressed air extraction passage vanes 312.

As shown in FIG. 5, the flange 31R includes:
The impeller air inlet 35 and the compressed air extraction passage 313 are provided, and the air intake inlet wing portion 314 and the compressed air extraction passage vane 312 are provided respectively. The air intake port wing 314 and the compressed air extraction passage wing 312 are processed into a wedge shape or a propeller shape.

The impeller air inlet 35 is a low pressure portion of the inner peripheral surface 37, which will be described in detail in operation. The air intake wing portion 314 has an inner peripheral surface 3 which will be described in detail in operation.
Fix the high pressure part of 7 to the place where it is blocked.

As shown in FIG. 1, the compressed air extraction passage 3
13 is a high pressure portion of the outer peripheral surface 38, which will be described in detail in operation.

The compressed air extraction passage vane portion 312 fixes the low pressure portion of the outer peripheral surface 38, which will be described in detail in operation, at a place where the low pressure portion is blocked. As shown in FIG. 1, the impeller 30 rotates counterclockwise. Next, the operation of the first embodiment will be described.

In FIG. 6, the air from which dust in the atmosphere has been removed by the filter 10 is fed from the impeller air inlet 35 to
The air intake port vanes 314 provided on the flanges 31L and 31R enter the impeller 30 that is the compressor body.

The impeller 30 rotating counterclockwise has an inner peripheral surface 3 shown in FIG.
Due to the waveform shape of 7, a high-pressure air portion a and a low-pressure air portion b are generated. The air intake wing 314 is fixed to a place where the high pressure portion of the inner peripheral surface 37 is blocked, and prevents the high pressure air portion a and the low pressure air portion b from being mixed.

The taken-in air enters the narrow tube airway 33 from the airway inlet 32 provided in the high pressure air portion a of the airway inlet surface 37. The air that has entered the narrow tube airway 33 is compressed by the mass of the air due to the acceleration of the centrifugal force of the rotating impeller 30. At this time, the state of compression in each thin tube airway 33 is not uniform, but is determined by conditions such as the position where each thin tube airway 33 is placed, the processing state, and the like. By compressing by each capillary airway 33, turbulent flow, backflow, their vibration, and resonance in the compression process are prevented.

The air compressed by the acceleration of centrifugal force exits from the airway outlet 34 to the casing 20 side. The outer peripheral surface 38 of the impeller 30 is processed into a corrugated shape, and this corrugated shape generates a high-pressure air portion c and a low-pressure air portion d due to the rotation of the impeller 30. The airway outlet 34 is provided in the low-pressure air section D, and the compressed air is discharged to the casing 20 side. The corrugated shape of the outer peripheral surface 38 brings about a wedge effect between the casing 20 and the high-pressure air portion C to compress the air.

The compressed air outlet port wing portion 312 provided on the flanges 31L and 31R is a compressed air outlet port 313.
It is fixed to the low pressure air section except for. The compressed air extraction passage vane portion 312 prevents the high pressure air portion c and the low pressure air portion d from being mixed together.

The compressed air extraction passage 313 is provided in the high pressure air section C. The compressed air discharged from the compressed air extraction passage 313 is compressed air discharge port 2 provided on the side surface of the casing 20.
It is taken out from 2. The number, length, cross-sectional area, and shape of the narrow tube airway 33 are determined by the purpose of compression, the difficulty of processing, and the amount of air flow to be performed.

In the invention according to the first embodiment, the air trapped in the narrow airway is gently compressed by its own weight and acceleration.

The operation is such that a force of about 500 G is easily obtained with the same diameter of the impeller 30, and by using this force, the structure of the capillary airway 33 as in the present invention is used to easily compress the air. Is possible. The reason why the air compression is possible is that the adoption of the narrow tube air passage 33 makes it possible to make the compression process uniform and stable, and prevent the inflow, turbulence, backflow, their vibrations, and resonance in the compression process. I was able to do it. Since the first embodiment uses the acceleration by pure centrifugal force, the operating principle is completely different from that of the conventional compressor using centrifugal force.

In the first embodiment, as a result of the above, by adopting the thin tube airway 33 without requiring a huge acceleration, the thin tube airways 33 can be gently compressed in each tube. The conventional turbo compressor does not suffer from the surging phenomenon, which is the biggest problem, and realizes stable and easy air compression in a wide range of air volume.

Next, a second embodiment of the present invention will be described.

FIG. 7 is a side view of the impeller, and FIG. 8 is a VIII-V of FIG.
It is a III line sectional view.

As shown in FIGS. 7 and 8, the impeller 30
Is the whole rotating body having an air compression function. Impeller 30
Includes an impeller air inlet 35, an inner peripheral surface 37, and an airway inlet 31.
5, airway 36, anterior chamber 310, thin tube airway bundle 39, rear chamber 31
1, an airway 36, an airway outlet 316, and an outer peripheral surface 38.

On both sides of the impeller 30, flanges 31L,
The flange 31R is attached. The flange 31L is
The motor shaft 51 is fixed, and the compressed air extraction passage 31
3. It has a compressed air extraction passage vane 312. Further, the flange 31R has an impeller air inlet 35 and a compressed air extraction passage 313, and each has an air intake port wing 314 and a compressed air extraction passage wing 312.

The air intake port wing 314 and the compressed air extraction passage wing 312 are processed into a wedge shape or a propeller shape. The impeller air inlet 35 is a low pressure portion of the inner peripheral surface 37. The air intake wing portion 314 is fixed to the place where the high pressure portion of the inner peripheral surface 37 is blocked. As shown in FIG. 8, the compressed air extraction passage 313 is a high pressure portion of the outer peripheral surface 38.
The compressed air extraction passage vane portion 312 is fixed to a place where the low pressure portion of the outer peripheral surface 38 is blocked. In FIG. 8, the impeller 30 rotates counterclockwise.

The operation of the second embodiment will be described.

No problem occurs when the compression states of the respective thin tube air passages 33 are substantially uniform. However, in the case where a large number of thin tube air passages 33 are used, the impeller is used due to the desired pressure-air flow relationship. Due to the arrangement relationship of the airway inlet 32 and the airway outlet 34 of 30, it becomes difficult to make the air inflow and outflow conditions uniform, and a surging phenomenon may occur between the thin tube airways 33 or inside the thin tube airway 33. .

In the case of the above problem, the thin tube air passages 33 are not directly provided at the thin tube air passage air inlet 32 and the air passage outlet 34 of the impeller 30 and are shown in FIG. A large number of bundles are provided as a bundle, and a front chamber 310 and a rear chamber 311 are provided in front of and behind the bundle.

The anterior chamber 310 and the posterior chamber 311 are connected to the airway 36 and are in contact with the airway inlet 315 and the airway outlet 316.

The main compression process is performed by the narrow tube airway bundle 39, and the airway inlet 315 and the airway outlet 316 are combined into one or a plurality to take in and take out air.

As a result, the trouble in the compression process which occurs in each thin tube airway 33 was prevented.

Next, a comparison between the features of the present invention and the conventional turbo compressor will be described.

Even when a large number of thin tube air passages 33 are used, it becomes difficult to uniformly take in and take out air from the impeller 30 because of the desired pressure and air flow rate. A surging phenomenon may occur inside the narrow airway 33. The main cause of the inconvenience is that the conditions differ depending on the intake and extraction positions of the air in each of the thin tube air passages 33.

In that case, each tubular airway 33
The airway inlet 315 of the impeller 30 and the airway outlet 316
Instead of directly providing the thin airway 33 in one bundle, the anterior chamber 310 and the posterior chamber 311 are provided before and after the bundle. The front chamber 310 and the rear chamber 311 are connected to the airway 36 and are in contact with the airway inlet 315 and the airway outlet 316.

As a result, the compression process in each narrow tube airway 33 can be made uniform, and the surging phenomenon and interference between the narrow tube airways can be prevented.

Comparing the accelerations generated by the conventional turbo compressor and the compressor of the present invention in terms of structural numerical values, the following is obtained.

Next, an example of trial calculation of acceleration generated in the turbo compressors currently on the market will be described. Impeller 30
The radius is 0.05 m, the rotation speed is 40,000 rpm, and α with respect to the circumferential direction at this time is obtained as follows.

Acceleration α = rω ² = 0.05 × (2π40000 / 60) ² ≈876,408 (m / s ² ) r: radius (m) ω = 2πn (rad / sec) If converted to force, 876,408 /9.8≈89,429 (G) The acceleration calculated here is the acceleration of the outermost portion B of the blade A in the impeller 30 of FIG. 11, and is the maximum acceleration in this impeller 30. Acceleration of blade A and air E
The mass is compressed by the acceleration relative inertial force C of the mass. The compressed air blown out from the blade A has a large amount of kinetic energy D, and the kinetic energy D collides with the casing of the turbo and is compressed again.

Next, an example of trial calculation of acceleration according to the present embodiment will be described.

The impeller 30 has a radius of 0.05 m and a rotational speed of 3,
000 rpm, here, the radius of the impeller 30 is the same as that of the turbo system, and the rotational speed of the impeller 30 is as follows when the acceleration is obtained by using the synchronous rotational speed of the bipolar motor at 50 Hz.

Acceleration α = rω ² = 0.05 × (2π3000 / 60) ² ≈4,929 (m / s ² ) r: radius (m) ω = 2πn (rad / sec) 4,929 /9.8≈502 (G) The acceleration calculated here is the acceleration at the extreme end portion and the capillary outlet portion 34 in the capillary airway 33 in FIG. 6, and is the maximum acceleration in the capillary airway 33. Due to this acceleration, the air crushes and is compressed by the mass of the air.

Next, the actual comparison of the air compression methods will be described. It is on the ground that the pressure of 1 kg / cm ² is generated in 1G. The pressure of the compressed air actually used in the factory is 7 kg / cm ^{2 when} it is generated, and it is about 4 kg / cm ^{2 for} actually used tools. When compared with those, as shown in the above-mentioned trial calculation values, air is processed with a large acceleration that cannot be compared.

It is not easy to generate the rotation speed of 40,000 rpm required by the conventional turbo compressor, and continuous operation at that rotation speed for a long time requires a lot of cost and expertise for maintenance. Because it is necessary, it becomes an expensive product. It goes without saying that the main reason for this is the properties of air. In the present embodiment, these characteristics of air are fully utilized. By adopting the structure, it tries to apply pressure to air as it applies to water. Therefore, by adopting the present invention,
It is now possible to obtain compressed air in a simple form.

Next, a third embodiment of the present invention will be described. 9 and 10 show a third embodiment of the present invention. According to the present invention, when designing, the discharge pressure of the compressor and the discharge air volume have the following relationship.

The discharge pressure is proportional to the length of the capillary airway 33 and the rotation speed of the impeller 30. The amount of discharged air is proportional to the diameter of the narrow tube airway 33 and the number of the small tube airway 33. In terms of stability during the compression stroke,
It is inversely proportional to the diameter of 3, and is proportional to the tubular airway length. Regarding the shapes of the airway inlet surface and airway outlet surface, it is necessary to consider that the wind flow is not disturbed for efficient intake and exhaust.
The interval between the impeller 30 and the casing is also the final compression stroke and has been thoroughly studied. At the same time, it is necessary to consider the flow of compressed air. In addition, when a large number of narrow airways are lined up in the vertical and horizontal directions due to the large air volume, the axial airflow becomes unstable, so it is necessary to consider the diagonal arrangement. As a result of designing in consideration of the above, a compressor having a four-pole structure as shown in FIGS. 9 and 10 was obtained.

As shown in FIG. 10, four small tube blocks 39 were embedded in the impeller 30 to have a large air volume design. As a result of the implementation, in the region of 20 to 25% or less of the maximum air volume, the unstable region occurred with the increase of the discharge pressure. Therefore, in order to stop the compression stroke in these air volume regions, an intake adjustment valve 60 is provided between the filter 10 and the air intake port as shown in FIG. 9 and operated by an external pressure switch, and compression in the low air volume region is performed. The structure is designed to stop the process. Further, in a high pressure compressor, it may be necessary to combine two or three stages.

[0081]

According to the compressed air generating apparatus of the present invention, a plurality of easily-manufactured thin tube airways are used, and the acceleration due to the centrifugal force generated in the thin tube airways is used, so that each thin tube airway can be produced. The air compression process can be made uniform and stable, the occurrence of the surging phenomenon can be prevented, consumable materials such as oil are not required, and the operating cost can be reduced, and the structure is simple and the manufacturing cost can be reduced.

[Brief description of drawings]

1 is a cross-sectional view taken along line I-I of FIG.

FIG. 2 is a configuration diagram of a compressed air generation device according to the first embodiment of the present invention.

FIG. 3 is a side view of the impeller according to the first embodiment of the present invention.

FIG. 4 is a side view of the impeller according to the first embodiment of the present invention.

FIG. 5 is a side view of the side plate according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of a compression process of the compressed air generation device according to the first embodiment of the present invention.

FIG. 7 is a side view of an impeller according to a second embodiment of the present invention.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a side view of an impeller according to a third embodiment of the present invention.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is an explanatory diagram of a compression process of a conventional compressed air generator.

[Explanation of symbols]

10 ... Filter 20 ... Casing 21 ... Base 22 ... Compressed air outlet 30 ... Impeller 31R ... Flange 31L ... Flange 32 ... Airway entrance 33 ... tubular airway 34 ... Airway exit 35 ... Impeller air inlet 36 ... respiratory tract 37 ... Inner surface (impeller airway entrance surface) 38 ... Outer peripheral surface (impeller airway exit surface) 39 ... Small airway bundle 310 ... front room 311 ... Rear room 312 ... Compressed air extraction passage wing 313 ... Compressed air extraction passage 314 ... Air intake wing 315 ... airway entrance 316 ... Airway exit

Claims (5)

(57) [Claims] 1. A compressed air generator in which an impeller is rotated in a casing so that air taken into the rotation center side of the impeller is taken out as compressed air from the outer peripheral side of the impeller. , An inner peripheral surface, an outer peripheral surface, a side plate, and a narrow tube airway, the inner peripheral surface being formed around the rotation center of the impeller and having airway inlets located at substantially equal intervals in the circumferential direction. The outer peripheral surface constitutes an outer peripheral surface of an impeller, and has an airway outlet corresponding to the airway inlet, and the side plate constitutes both side surfaces of the impeller, The compressed air generating device, wherein the narrow tube airway communicates with the airway inlet and the airway outlet and extends spirally with the center of rotation of the impeller being concentric. 2. A compressed air generating device in which an impeller is rotated within a casing so that air taken into the center of rotation of the impeller is taken out as compressed air from the outer peripheral side of the impeller. , An inner peripheral surface, an outer peripheral surface, a side surface plate, and a narrow tube airway, the inner peripheral surface is formed around the rotation center of the impeller, at substantially equal intervals in the circumferential direction, and It has a plurality of airway inlets located at substantially equal intervals in a direction parallel to the rotation axis direction, the outer peripheral surface constitutes an outer peripheral surface of an impeller, and airway outlets corresponding to the respective airway inlets. A plurality of, the side plate constitutes both sides of the impeller, the capillary airway is in communication with the corresponding airway inlet and airway outlet, concentric with the center of rotation of the impeller Compressed air generating device characterized by being spirally extended . 3. A compressed air generator in which an impeller is rotated within a casing so that air taken into the center of rotation of the impeller is taken out as compressed air from the outer peripheral side of the impeller. An inner peripheral surface, an outer peripheral surface, a side plate, and an airway, the inner peripheral surface being formed around the rotation center of the impeller and having airway inlets located at substantially equal intervals in the circumferential direction. The outer peripheral surface constitutes an outer peripheral surface of an impeller and has an airway outlet corresponding to the airway inlet, and the side plates configure both side surfaces of the impeller, The airway is in communication with the airway inlet and the airway outlet, and has an anterior chamber, a posterior chamber and a tubular airway bundle, the anterior chamber is arranged on the airway inlet side of the airway, The rear chamber is arranged on the airway outlet side of the airway, and The bundle is composed of a plurality of capillary airways, each of the capillary airways is in communication with the front chamber and the rear chamber, each spirally extending with the center of rotation of the impeller concentric. Compressed air generator. 4. The side surface plate has a flange, and the flange extends in a direction radiating from a rotation center of the impeller with respect to an outer peripheral surface of the impeller, and a compressed air extraction passage is provided. The compressed air extraction passage is inclined in the rotational direction of the impeller from the flange inner surface side facing the outer peripheral surface of the impeller to the flange outer surface side opposite to the flange inner surface. The compressed air generator according to claim 1, 2 or 3, characterized in that. 5. An inner peripheral surface of the impeller has a sloped portion, the sloped portion is inclined in a rotation direction of the impeller with respect to a rotation center direction of the impeller, and the airway inlet is The compressed air generating device according to claim 1, wherein the compressed air generating device is provided on a slope portion.