JP2995928B2 - Blower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower, and more particularly to a blower in which an impeller is provided in a cylindrical casing so that an axial flow having a large pressure ratio can be obtained.

[0002]

2. Description of the Related Art In general, blowers (fans) are broadly classified into axial flow fans and centrifugal fans, depending on the difference in the direction of air flow relative to the rotation of the blade. The axial flow fan generates air in the axial direction by rotating blades such as a propeller, and can obtain a high-speed flow. Centrifugal fans, on the other hand, generate air by flowing air that has entered the axial direction of the impeller in a radial direction by centrifugal force. The feature is that a large pressure ratio can be obtained with a car.

[0003]

By the way, depending on the purpose of use of the fan, there is a case where it is desired to perform an axial blow with a higher pressure than a flow velocity.

However, in order to generate high air pressure by an axial fan, the pressure rise per blade is small, so that an attempt to obtain the same pressure ratio as that of a centrifugal fan increases the number of vibrating stages and the number of blades. However, there is a problem that work and assembly are difficult.

An object of the present invention is to provide a blower that can generate a large pressure ratio with a simple structure while being a fan that generates an axial blower.

[0006]

In order to achieve the above object, the present invention provides a blower having a tubular fan casing,
Of the fan casing via the support plate to the fan casing
Wing axle how to support the boss located at the axis
Jing and the end of the rotating shaft that is rotatably supported by the boss
Fitted to the mounted impeller and cylindrical casing
Together with the support plate of the axle housing.
With a diffuser piece that fits the suction side of
Attached to the diffuser piece via a spacer
And the exhaust side of the impeller
A diffuse that extends radially outward of the impeller with and
A diffuser housing having a disc-shaped cap piece forming the passage, and an outer periphery of the fan casing.
Drives the rotating shaft of the impeller via the attached power transmission means
And a motor that performs the operation .

[0007]

According to the blower of the present invention configured as described above, the air introduced into the impeller is boosted by centrifugal force due to the rotation of the impeller and flows in the radial direction. Sky discharged from impeller
Qi is formed between the diffuser piece and the cap piece
In the diffuser passage, the speed is reduced and the pressure is further increased.
The high-pressure air that has exited the diffuser is blown as an axial flow along the cylindrical inner surface of the fan casing.

[0008] blower Thus the present invention have use the wheel to the flow generating means, which is provided on the cylindrical fan casing, fitting the suction side of the impeller to the fan casing
Diffusers that fit together and fit into the casing
To the diffuser piece via a spacer.
To cover the discharge side of the impeller and the diffuser piece
A diffuse that extends radially outward of the impeller with and
Since <br/> fitted with disc-shaped cap piece forming a The passage may be such be fan for generating a blast of axial flow shape achieves a et large <br/> heard pressure ratio, and, Small number of parts
Not easy to assemble .

[0009]

Next, an embodiment of the present invention will be described.

As shown in FIG. 1, a tubular axle housing is fitted coaxially with the inner surface of a cylindrical fan casing 1.
An impeller 4 is integrally mounted on one end of a wing axle (rotation shaft) 3 rotatably supported on the axis of the wing axle housing 2 , and a small wheel is mounted on the other end. Pulley 1
8 are attached. The wing axle housing 2 accommodates the wing axle 3 and rotatably supports the wing axle 3, and is mounted radially on the outer surface of the boss to support the boss 5 positioned on the axis of the fan casing 1. It is composed of a plurality of support plates 6. These support plates 6 are fixed to the ribs 7 welded and fixed to the inner surface of the fan casing 1 with bolts 22 and serve to support the boss 5 and reinforce the casing 1.
The impeller 4 has a plurality of blades 9 mounted on the outer periphery of a disk-shaped impeller body 8 in a substantially radial manner, and has an air inlet 4a on a suction side (lower part) and an outlet 4b on a discharge side (side part). have. When the impeller 4 is driven to rotate, the air taken in from the inlet 4a flows in the radial direction by centrifugal force and generates air from the outlet 4b.

Each support plate 6 of the blade axle housing 2 is formed with a notch 6 a in the vicinity of the wheel, and the support plate 6 is formed between the air intake port 11 formed on the side of the fan casing 1 and the wheel 4. An air passage 12 connecting to the inlet 4a is formed.
A diffuser housing 10 is provided at the downstream end of the suction air of the support plate 6 so as to house the impeller 4. The diffuser housing 10 is attached to the downstream end of the suction air of the support plate 6 by welding, and is provided with an annular diffuser provided by fitting to the inner surface of the fan casing 1.
And a disc-shaped cap piece 10b provided on the exit 4b side of the impeller 4 so as to cover the impeller 4 so as to form a diffuser. Diffuse
The user piece 10a is fixed to a rib 20 welded and fixed to the inner surface of the fan casing 1 with a bolt 23, and an inner peripheral portion thereof is provided with an impeller 4 rotatably provided thereto.
A labyrinth ring 21 is provided to seal the gap between the labyrinth ring. In the vicinity of the outer peripheral edge of the diffuser piece 10a, an air passage is formed in a curved shape so as to guide the air blow from the impeller 4 upward. Cap piece 10b is diffused
The diffuser passage 14 is formed between the pieces 10a and 10b and is fixed to the user piece 10a by bolts 13 via a spacer 24.

On the outside of the fan casing 1, a motor 15 for driving the impeller is mounted in parallel with the impeller shaft 3. A large pulley 17 is provided at the end of the drive shaft 16 of the motor 15.
However, small pulleys 18 are attached to the other end of the wing axle 3, respectively.
Are connected by an annular belt 19 for power transmission provided through the air intake port 11 of the vehicle.

Next, the operation of this embodiment will be described.

The impeller 4 is rotated at a high speed by the drive of the motor 15. The air is introduced into the fan casing 1 from the air inlet 11, is guided to the impeller inlet 4 a through the air passage 12, and is introduced into the impeller 4 from the axial direction. The air that has entered the impeller 4 is converted into a flow of high air pressure in the radial direction by strong centrifugal force due to the rotation of the impeller 4, exits from the impeller outlet 4b, enters the diffuser passage 14, where it is decelerated. Is further boosted. The high-pressure air exiting the diffuser passage 14 flows in the axial direction along the cylindrical inner surface of the fan casing 1 and is blown from the discharge opening of the fan casing 1.

As described above, the blower according to the present embodiment uses the impeller 4 as the flow generating means and uses the impeller 4 as the cylindrical fan casing 1.
With such a configuration, a large pressure ratio can be obtained with a simple configuration while using a fan that generates an axial flow of air. In addition, since this blower has a small number of components and can integrally process parts such as the wing axle housing 2 including a part requiring adjustment such as centering by machining, troublesome adjustment is not required at the time of assembly, and it is easy. Can be assembled.

[0016]

In summary, according to the present invention, the following excellent effects can be exhibited.

(1) High-pressure axial-flow ventilation can be realized with a simple fan structure.

(2) The number of parts is small and assembly is easy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fan casing 2 Wing axle housing 3 Wing axle 4 Wing wheel 4a Inlet 4b Outlet 10 Diffuser housing 12 Air passage 14 Diffuser passage

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Isao Ikegami 3-1-1-15 Toyosu, Koto-ku, Tokyo Ishikawa-jima-Harima Heavy Industries Co., Ltd. Tojin Technical Center (72) Inventor Yukinobu Saeki Toyosu, Koto-ku, Tokyo No.2-16, Ishikawa Shima-Harima Heavy Industries, Ltd. Toyosu Sogo Office (56) References Real Open Sho 51-17808 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F04D 29 / 44 F04D 25/02

Claims (1)

(57) [Claims] 1. A tubular fan casing and a fan for the fan
Axial position of fan casing via support plate to casing
Wing axle housing for supporting bosses located in
And attached to the tip of the rotating shaft that is rotatably supported by the boss
And fitted to the cylindrical casing
Supported by the support plate of the axle housing,
Has a diffuser piece that fits the
When attached to the fuser piece via a spacer,
Cover the discharge side of the impeller, and
A diffuser passage that extends radially outward of the car
A diffuser housing having a disk-shaped cap piece forming the fan casing and an outer periphery of the fan casing.
Motor that drives the rotating shaft of the impeller through the power transmission
Blower, characterized in that a chromatography data.