JPH08151997A - Multilayer disk fan having balance function - Google Patents

Abstract

PURPOSE: To effectively suppress generating noise and vibration by providing weight mounting holes with a space apart in a circumferential direction in peripheral parts of a motor mounting substrate and an annular disk in the uppermost step, and mounting a weight in this weight mounting hole. CONSTITUTION: A fan is formed by piling together in many layers or by laminating thin annular disks 11 with a fine space apart in a rotary shaft direction on a motor mounting substrate 10. The fellow annular disks 11 are connected to each other by spacers 12 provided with a space apart in a circumferential direction. In peripheral parts on outer side and surfaces respectively of the motor mounting substrate 10 and the annular disk 11 in the uppermost step, weight mounting holes 23 are provided with a space apart in a circumferential direction, to mount a weight 24 in this weight mounting hole 23. In this way, the weight 24 can be mounted by an arbitrary quality in an accurate position on the outer side end surface, and accurate balancing correction can be performed. Further during operating the multilayer disk fan A rotated, produced noise and vibration can be effectively reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer disc fan capable of reducing noise and vibration as much as possible.

[0002]

2. Description of the Related Art Conventionally, there has been a multi-layer disc fan as one form of a blower fan. However, the multi-layer disc fan has a thin annular disc formed on a motor mounting substrate made of discs with a narrow space in the rotation axis direction. It is an impeller made of a large number of layers.

In such a multi-layer disk fan, the interval between the annular disks is narrow, the development of the boundary layer between the annular disks is restricted, and peeling is less likely to occur, so that it is suitable for other fans such as sirocco fans. The noise level is low and the low noise flow rate range is wide.

[0004]

However, the multilayer disc fan has a structure in which a large number of annular discs are laminated in multiple layers, and since the weight becomes heavy, when an imbalance occurs, the rotating shaft shakes, noise or noise is generated. Vibration is easily generated.

In order to reduce noise and vibration caused by unbalance as much as possible, some cross-flow fans 49 have a balance structure. Such a balance structure is, for example, as shown in FIG. In addition, it is configured by embedding a required number of weights 52 in the outer peripheral edge of the end plate 50 or the end plate 51 as necessary.

However, unlike the cross-flow fan 49 whose both ends are supported by bearings, the multi-layer disk fan supported in the shape of a cantilever has the same procedure as the cross-flow fan 49, in the same manner as the cross-flow fan 49. It was difficult to obtain a sufficient balance effect simply by attaching a weight to the.

Further, in the prior art, the weight 52 is attached to the outer peripheral edge of the end plate 50 or the end plate 51 by adhering it with an adhesive. Therefore, when noise or vibration is large,
In some cases, the weight 52 easily separates from the outer peripheral edge of the end plates 50, 51, making it difficult to achieve the desired balance effect.

An object of the present invention is to provide a multi-layer disk fan having a balance function that can solve the above problems.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a multi-layer disk fan is formed as an impeller by stacking a large number of thin annular disks on a motor mounting board made of a disk at narrow intervals in the rotation axis direction. In, the motor mounting board and the outermost circular surface of the uppermost circular disk are provided with weight mounting holes at intervals in the circumferential direction, and weights are mounted in the same weight mounting holes. The present invention relates to a multilayer disc fan having a balance function.

According to the present invention, the attachment circle diameter of the weight attachment hole provided on the uppermost circular disk is different from the attachment circle diameter of the weight attachment hole provided on the motor attachment board. The present invention relates to a characteristic multilayer disc fan.

According to the present invention, the motor mounting board and the annular disk are integrally molded with resin, and the weight is attached to the weight attachment hole by embedding the weight in the weight attachment hole. Another structural feature is that the weight is fixed by welding the resin.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multilayer disc fan A according to the present invention will be specifically described below with reference to the embodiments shown in the accompanying drawings (FIGS. 1 to 6).

As shown in FIGS. 1 to 3, in a multi-layer disk fan A, a thin annular disk 11 is multiplexed on a motor mounting board 10 made of a disk with a minute interval in the direction of the rotation axis. It is configured by stacking or stacking.

The annular discs 11, 11 are connected to each other by a spacer 12 provided at intervals in the circumferential direction.

Further, the motor mounting board 10 is provided with a boss portion 13 at the center thereof, and the boss portion 13 is provided with a motor shaft fitting hole 14 in which the motor shaft fitting hole 14 is provided. The motor shaft 16 of the rotation motor 15 whose one side surface is chamfered can be inserted.

Further, in FIG. 1, the motor shaft 16 is provided with a threaded portion 17 on its projecting portion, and a nut 20 is screwed onto the threaded portion 17 via a spring washer 18 and a flat washer 19 so that The multi-layer disk fan A can be securely connected and fixed to the motor shaft 16.

The present invention is characterized by a structure in which the multi-layer disk fan A having the above-described structure is provided with a balance function capable of reducing noise and vibration during rotation operation as much as possible.

That is, as shown in FIGS. 1 and 2, the multilayer disk fan A has an outer end surface 11a of the uppermost annular disk 11 thereof.
A large number of weight mounting holes 21
A weight 22 having the shape shown in FIGS. 4 and 5 is firmly attached to some of the weight attachment holes 21.

On the other hand, the multi-layer disc fan A is shown in FIGS.
As shown in, the outermost end surface 10a of the motor mounting board 10 forming the lowermost stage is also provided with a large number of weight mounting holes 23 with a constant circumferential interval. Some have a weight that has a shape similar to that shown in FIGS. 4 and 5.
24 is firmly attached.

Further, in this embodiment, as shown in FIGS. 1 to 3, the attachment circle diameter of the weight attachment hole 21 provided in the motor attachment board 10 is the weight provided in the uppermost motor attachment board 10. The diameter of the mounting circle is different from that of the mounting hole 23.

As described above, in this embodiment, the multilayer disc fan A can secure a sufficient mounting area, not the outer peripheral edge of the narrow upper annular disc 11 or the lowermost motor mounting substrate 10. Since the weights 22 and 24 are attached to the outer peripheral portions of the outer end surfaces 11a and 10a of the uppermost circular disk 11 and the lowermost motor mounting board 10, the unbalance amount obtained using the desired balancing machine Based on the above, it is possible to attach the weights 22 and 24 to the outer end surfaces 11a and 10a at the exact positions on the outer end surfaces 11a and 10a, and to perform precise balancing correction, and to rotate the multi-layer disk fan A. The generation of noise and vibration during operation can be effectively reduced.

Further, in this embodiment, the multi-layer disc fan A is used.
Is integrally molded using resin.

Therefore, as shown in FIGS. 1 to 4, the weight 2
After fitting 2, 24 into the weight mounting holes 21, 23 respectively,
By using a welding tool 25 as shown in Fig. 4, a part of it can be melted and the upper surfaces of the weights 22 and 24 can be covered with the melted resin. It can be firmly and firmly connected to 10.

Therefore, even when the multilayer disc fan A is rotated at a high speed, it is possible to reliably prevent the weights 22 and 24 from falling off the annular disc or the motor mounting board 10, and even at a high speed rotation. The generation of noise and vibration can be effectively suppressed.

Although the multi-layer disk fan according to the present invention has been described with reference to the embodiments, the present invention is not limited to the structures described in the embodiments, and other embodiments and modifications are possible. The present invention is included in the present invention without departing from the scope of the claims. For example, the multi-layer disk fan does not necessarily have to be a resin-integral molded product, and an annular disk and a motor mounting board are assembled. Can also be

[0026]

The present invention has the following effects.

The multi-layer disc fan is not the outer peripheral edge of the narrow uppermost circular disc or the lowermost motor mounting substrate, but can secure a sufficient mounting area, and the uppermost circular disc and the lowermost motor can be secured. Since the weight is attached to the outer peripheral portion of the outer end surface of the mounting substrate, based on the unbalance amount obtained by using a desired balancing machine, the weight is attached to the accurate position on the outer end surface by an arbitrary amount. It can be mounted, precise balancing correction can be performed, and the generation of noise and vibration during the rotating operation of the multilayer disc fan can be effectively reduced.

When the multi-layer disk fan is integrally formed of resin, the weights are fitted into the weight mounting holes, and then a part thereof is melted using a welding tool or the like.
The upper surface of the weight can be covered with the melted resin, and when the resin is subsequently hardened, it can be securely and firmly fixedly connected to the annular disc or the motor mounting board. for that reason,
Even when the multi-layer disc fan rotates at high speed, it is possible to reliably prevent the weight from falling off the annular disc or the motor mounting board, and noise and vibration are effectively generated even at high speed rotation. Can be deterred.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of a multilayer disc fan according to the present invention.

FIG. 2 is a cross-sectional view taken along line II of FIG.

FIG. 3 is a sectional view taken along line II-II in FIG.

FIG. 4 is an explanatory view showing a mounting state of a weight.

FIG. 5 is a perspective view showing the shape of a weight.

FIG. 6 is an explanatory diagram showing a method of attaching a weight.

FIG. 7 is an explanatory diagram of balancing in a cross-flow fan.

[Explanation of symbols]

 A Multi-layer disk fan 10 Motor mounting board 11 Annular disk 12 Spacer 13 Boss part 15 Rotating motor 16 Motor shaft 21 Weight mounting hole 22 Weight 23 Weight mounting hole 24 Weight

Front page continuation (72) Inventor Atsushi Kaihara 2-1, 1-1 Nakajima, Kokurakita-ku, Kitakyushu, Fukuoka Prefecture Totoki Equipment Co., Ltd. (72) Inventor Naoya Ito, 433, Urenren, Uren-cho, Ibaraki Prefecture Servo Co., Ltd., Uren Factory (72) Inventor, Jihei Shimada, Ibaraki Prefecture, Urakuren-cho, Uriren No. 433, 2 days This Servo Co., Ltd., Uren Factory, (72) Inventor Masahiro Mimura, Ibaraki-ken, Uren-cho, Urenren 2 Nichimoto Servo Co., Ltd., Uren Factory

Claims (3)

[Claims] 1. A multi-layer disk fan, which is an impeller in which a large number of thin annular disks are superposed on a motor mounting board made of a disk at narrow intervals in the direction of the rotation axis, and the motor mounting board and the uppermost stage. Balance function, characterized in that holes for weight attachment are provided in the outer peripheral portion on the outer end surface of each of the annular discs at intervals in the circumferential direction, and weights are attached to the attachment holes for weight attachment. A multi-layer disc fan. 2. The mounting circle diameter of the weight mounting hole provided on the uppermost circular disk is different from the mounting circle diameter of the weight mounting hole provided on the motor mounting board. Item 1. The multilayer disc fan according to item 1. 3. The motor mounting board and the annular disc are integrally molded of resin, and the weight is attached to the weight attachment hole by embedding the weight in the weight attachment hole. 3. The multi-layer disk fan having a balance function according to claim 1, which is performed by fixing the resin by welding.