JP3338718B2 - Anti-vibration support structure for fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration support structure for a fan, which supports a fan, which is a vibrating object, in a case and accommodates the fan in a case.

[0002]

2. Description of the Related Art Conventionally, in order to support a fan in a state in which a fan is housed in a case and vibration is applied,
Generally, as shown in FIG. 5, the case 1 is supported by a supporting portion 7 via a support 8 (in this example, suspended and supported), and the fan 2 which is a vibrating object housed in the case 1 is used for vibration isolation. The case 1 was supported via the elastic body 10 '.

A so-called dynamic damper system has been proposed to obtain a vibration-proof effect higher than that of a general vibration-proof support structure for a fan, that is, as shown in FIG. It is conceivable to adopt a method in which the vibration source 2 is supported by the support portion 7 via the body 10 and the additional weight W is supported by the vibration source 2 via the vibration-proof elastic body 11 on the floating side. As a specific application structure, as shown in FIG. 6, in the general anti-vibration support structure for a fan shown in FIG. 5, the fan supported in the case 1 via the anti-vibration elastic body (support side) 10 '. On the other hand, a structure in which the additional weight W is simply supported via the vibration-proof elastic body 11 'on the floating side has been considered.

[0004] C in the figure is a unitized case that houses the additional weight W and the elastic body 11 'for vibration isolation on the floating side.

[0005]

However, FIG. 4 shows the vibration-damping characteristics of the general vibration-damping support structure for a fan shown in FIG. 5 and the vibration-damping characteristics of the vibration-damping support structure employing the dynamic damper method. However, as can be seen from this characteristic diagram, the vibration damping support structure employing the dynamic damper method can obtain a higher vibration damping effect than the general vibration damping support structure for a general fan at a specific design frequency fa. In the vicinity of the specific design frequency fa, there is an adverse effect frequency fb at which the vibration rather increases.

Therefore, in practice, in order to stably obtain a high anti-vibration effect when the dynamic damper method is adopted, the anti-vibration effect at a specific design frequency fa is increased.
It is necessary to increase the interval between the specific design frequency fa and the adverse effect frequency fb. To satisfy this condition,
It is effective to increase the weight of the additional weight W sufficiently. However, when the weight of the weight W is increased, the weight of the weight W increases, so that the entire vibration isolating support structure for the fan increases. A problem arises in that the entire supporting object weight including the weight W becomes large and the cost of the apparatus increases, and this has hindered the practical use of the dynamic damper method as the vibration isolating support structure for the fan.

[0007] An object of the present invention is to employ a dynamic damper system with a rational structure in the vibration proof support of a fan housed in a case, thereby stably achieving a high vibration proof effect while avoiding the above problems. The point is to get it.

[0008]

A first characteristic configuration of a vibration isolating support structure for a fan according to the present invention is formed in a case.
Insert a support provided with an elastic body for vibration isolation on the support side into the hole.
Rutotomoni, the fan is a vibration body supported on the support portion via the support, the case for accommodating the fan via the vibration isolating elastic idler side supported by the fan, and the idler-side Is arranged inside the case.

A second characteristic configuration of the anti-vibration support structure for a fan according to the present invention is that the support-side anti-vibration elastic body is arranged inside the case.

[0010]

In other words, in the first characteristic configuration, the case for accommodating the fan is formed by the principle of the dynamic damper system.
It functions as an additional weight W (see FIG. 3). In addition, by disposing the floating-side vibration-absorbing elastic body inside the case, the case accommodating the fan is provided with a protective case for preventing damage and deterioration of the floating-side vibration-absorbing elastic body, and a floating-side vibration-proof elastic body. It also functions as a soundproof case that suppresses the diffusion of noise such as squeaking noise generated by the elastic body for vibration isolation.

Further, in the second characteristic configuration, the case for accommodating the fan is provided by disposing the support-side vibration isolating elastic body together with the floating-side vibration isolating elastic body inside the case. A protective case that suppresses damage and deterioration of the vibration-absorbing elastic body as well as the damage and deterioration of the supporting vibration-isolating elastic body, and noise such as squeaking noise generated by the floating vibration-absorbing elastic body. Functioning as a soundproof case that suppresses the ambient diffusion of noise such as squeak noise generated by the vibration-proof elastic body on the support side as well as the peripheral diffusion of the noise.

[0012]

In other words, according to the first characteristic configuration of the present invention, the case originally provided for accommodating the fan is used as a weight in the dynamic damper system. Compared to installing a dedicated weight, a specific design that can secure sufficient weight weight while avoiding problems such as an increase in the size of the vibration isolation support structure for the fan and an increase in the overall support weight due to the provision of the dedicated weight It is possible to improve the vibration damping effect at the frequency and increase the interval between the specific design frequency and the counter effect frequency, thereby making it small, inexpensive and easy to put into practical use,
It is possible to provide an anti-vibration support structure for a fan that can stably obtain a high anti-vibration effect by taking advantage of the dynamic damper method. Moreover, in addition to using the case accommodating the fan as a weight, it is also used as a protective case and a soundproof case for the floating vibration isolating elastic body. With a structure in which an elastic body is arranged, the dedicated protective case and soundproof case for the vibration-isolating elastic body on the floating side are additionally equipped. In addition, while avoiding an increase in equipment cost due to the increase in size and complexity, damage and deterioration of the floating vibration isolating elastic body, and noise such as squeak noise generated by the floating vibration isolating elastic body. In this respect, the practical use of the vibration isolating support structure for a fan can be more effectively improved in combination with the need for the dedicated weight as described above. .

According to the second characteristic configuration of the present invention, in addition to using the case accommodating the fan as a weight, and using it as a protective case and a soundproof case for the idling-side elastic body for vibration isolation, it further supports the case. The practical use of the above-mentioned vibration-proof supporting structure for a fan can be more effectively improved by being used also as a protective case and a sound-proof case for the vibration-proof elastic body on the side. If the case accommodating the fan is a muffling case in which sound absorbing means is provided on the case wall, the noise generated by the fan and the squeaking noise generated by the vibration-proof elastic body on the idle side in the implementation of the first characteristic configuration. In the implementation of the second characteristic configuration, it is more excellent in preventing the ambient diffusion of noise such as squeak generated by the elastic body for vibration isolation on the support side. In addition, a vibration isolating support structure for a fan can be provided.

[0014]

Next, an embodiment will be described.

In FIG. 1, reference numeral 1 designates a case for accommodating a fan 2 and forming an intake chamber 3 for a suction port 2a of the fan 2, which is provided with a sound absorbing means 4 such as attaching glass wool to a case wall. There is a silencing case to prevent leakage of fan noise.

The fan 2 takes in the gas to be conveyed from the intake duct 5 into the intake chamber 3 by the suction action, and sends out the intake gas to the air supply duct 6 by the air sending action.

The fan 2 and the case 1 are provided with holes H formed in the case 1 with respect to an upper support 7 such as a concrete slab.
A so-called hanging support, which is supported via a hanging support 8 inserted through the support member, and in the hanging support, a vibration isolator that prevents the vibration generated by the fan 2 from propagating to the upper support portion 7. The structure is adopted.

Specifically, as a vibration-proof structure, a fan base 9 on which the fan 2 is mounted in the case 1 is attached to the case 1.
The above-mentioned hanging support 8 inserted into the formed hole H
The suspension support member 7 suspends and supports the plurality of suspension supports 8, and the support-side vibration-absorbing elastic member 10 made of rubber, a spring, or the like is provided for each of the plurality of suspension supports 8. An elastic body for vibration isolation) is interposed.

The case 1 has a floating-side vibration-absorbing elastic member 11 made of rubber, a spring or the like, like the support-side vibration-absorbing elastic member 10 (the floating-side vibration-absorbing elastic member in the claims). ) To support the above-mentioned fan stand 9 in a suspended manner, thereby constituting a vibration damping support structure for a fan of a dynamic damper system. Further, in this configuration, the floating elastic member 11 on the floating side is arranged inside the case 1 together with the fan 2 as shown in FIG.

That is, the vibration source is supported by the support portion via the supporting vibration isolating elastic body, and the additional weight is supported by the vibration source via the floating moving vibration isolating elastic body. In constructing the damper type anti-vibration support structure (see FIG. 3), the case 1 is added by the above structure to the additional weight.
It is configured to be used as W and also used as a protective case and a soundproof case for the floating-side vibration-proof elastic body (the floating-side vibration-proof elastic member 11).

As described above, the fan 2 is supported by the upper supporting portion 7 via the support-side vibration-proof elastic member 10, and the case 1
The case 1 and the intake duct 5 are connected via a vibration isolating joint 12 in correspondence with the support of the fan base 9 via a vibration-proof elastic member 11 on the floating side. The penetrating portion 6 a fixed to the case 1 is connected to the fan 2 and the subsequent air supply duct 6 via anti-vibration joints 13 and 14, respectively.

[Another Embodiment] Next, another embodiment will be described.

(1) As shown in FIG. 2, instead of the hanging support form as in the above embodiment, the fan 2
And, in the mounting and supporting form in which the case 1 for housing the case 1 is installed, the hole H formed in the case 1 is
With the support 8 provided with the elastic body 10 for vibration isolation
Then, the fan 2 is supported on the support portion 7 via the support member 8, and
The case 1 accommodating the fan 2 is moved to the floating-side elastic body 11 on the floating side.
To the fan 2 through the
The present invention in which the body 11 is disposed inside the case 1 may be applied.

(2) As shown in FIG. 2, the support-side vibration-damping elastic body 10 and the floating-side vibration-damping elastic body 11 are arranged inside the case 1 so that the fan 2 is accommodated therein. The case 1 to be used may be used as a protective case and a soundproof case for both the floating-side vibration-absorbing elastic body 11 and the support-side vibration-absorbing elastic body 10.

(3) The case 1 for accommodating the fan 2 is not limited to the muffling case. The purpose of accommodation in the case 1 and the specific structure of the case 1 may be any.

(4) A support-side vibration-damping elastic body 10 interposed between the fan 2 and the support portion 7, and a floating-side vibration-damping elastic body interposed between the fan 2 and the case 1. Various structures and materials can be applied to each of the bodies 11.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a structural diagram showing an embodiment.

FIG. 2 is a structural view showing another embodiment.

FIG. 3 is a principle diagram of a dynamic damper method.

FIG. 4 is a graph showing vibration isolation characteristics.

FIG. 5 is a diagram showing a conventional general anti-vibration support structure for a fan.

FIG. 6 is a diagram showing a conventional anti-vibration support structure for a fan employing a dynamic damper method.

[Description of Signs] H Hole 1 Case 2 Fan 4 Sound Absorbing Means 7 Support 8 Support 10 Supporting Side Vibration Isolation Elastic Body 11 Floating Side Vibration Isolation Elastic Body

Continuation of the front page (56) References JP-A-64-21240 (JP, A) JP-A-63-189700 (JP, A) JP-A-61-283800 (JP, A) Real opening 58-7037 (JP, A) , U) Fully open sho 63-40600 (JP, U) Really open sho 59-65940 (JP, U) Fully open sho 56-140906 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB Name) F16F 15/02-15/08 F04D 29/60

Claims (2)

(57) [Claims] An anti-vibration support structure for a fan, wherein a fan (2) is supported by a support portion (7) in a state housed in a case (1) , wherein a hole (2) formed in the case (1) is provided. H) on the support side
Through the support (8) provided with the elastic body (10) for vibration isolation.
And the fan (2) is supported by the support portion (7) via the support (8 ), and the case (1) is supported by the fan (11) via a floating-side elastic body (11) on the floating side. (2) The fan vibration-damping support structure, wherein the floating-side elastic body (11) on the floating side is disposed inside the case (1). 2. The anti-vibration support structure for a fan according to claim 1, wherein said support-side anti-vibration elastic body (10) is arranged inside said case (1).