JPH01220809A - Soundproof device for electromagnetic induction equipment - Google Patents

Abstract

PURPOSE:To confine directly or absorb noises generated in spaces defined between reinforcing members and the surface of a floor, either by attaching a soundproof member to the bottom plate of a tank or to side plates of the tank near the bottom plate, or by inserting sound absorbing members in the gaps between the tank bottom plate and the floor surface. CONSTITUTION:A body tank 3 receiving contents of a body together with an insulating oil is placed on a floor, and reinforcing members 7 are attached on the outside of a bottom plate 32 of the tank with a certain distance from each other. A soundproof member 11 is arranged so as to shut gap spaces 10 defined between the reinforcing members 7 and the surface of the floor. Alternatively, sound absorbing members 12 may be arranged within these spaces. In this manner, it is possible to effectively confine noises that are generated from the gaps 10 defined between the bottom plate 32 and the floor surface 9 by vibration of the bottom plate 32.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a sound reduction mounting for preventing noise generated by an electromagnetic conductor.

[Conventional technology]

FIG. 12 shows, for example, the conventional Haji 1 shown in Japanese Patent Application Laid-Open No. 57-60815! This is a cross-sectional view of the sound reduction device for L magnetic induction equipment. ′／
Storage T core main body tank along with m2, 31 is main body tank 3
T^tank side plate, which constitutes a part of! 4 is a supplementary @ member of the tank side plate 31, 5 is a soundproofing member attached to the Mη1 member 4, and 6 is a tortoise plate attached to the soundproofing member 5.

7 is a reinforcing member for the bottom plate of the tank.
The floor surface where Q1 magnetic induction equipment is installed, 1G is the tank bottom plate! In this conventional device, the first of the four main bodies of the eyebrow magnetic device is moved in all directions due to the magnetic force during normal operation. During the vibration T, this following movement propagates through the insulating oil 2 and causes the main body tank 3 to move back, causing noise.

Therefore, among these benefits, in order to reduce the noise generated by the shaking of the tank side plate 31, soundproofing g is added to the four-strong member 4.
The soundproofing effect of the soundproofing member 5 is increased by attaching a ladle 6 and roughly attaching it to the vehicle equipment 6.

(The problem that the invention aims to solve) This is because the conventional one is made of T4 as described above.

Regarding the r6@ sound generated by the vibration of the tank side plate 3,
It is possible to effectively reduce the noise generated from the gap 1G between the bottom plate blade and the floor surface 9 due to the vibration of the tank bottom blade, and it is possible to obtain an effective soundproofing effect. Large-scale soundproofing equipment such as soundproof walls was required.

This invention solves the problems of the conventional ones.
1: It is designed to effectively reduce the noise generated from the gap lO created between the bottom plate and the floor surface 9 by the gap in the tank bottom plate without using large-scale soundproofing equipment. Purpose and T.

[Means for resolving the issue] The sound reduction device for four electromagnetic devices according to the present invention has a main body tank that stores the contents of the main body along with insulating oil on the floor, and a mutually connected one on the outside of the tank bottom plate. Supplementary II with a gap between them! &1g material installed, this supplementary I+! A soundproofing member is arranged to simulate the space formed between the gap between the 11 members and the floor surface T6, or a sound absorbing member is arranged in this space.

[Effect]

Compensation by the soundproofing member or sound-absorbing member in this invention
The noise generated in the space formed between the M member and the floor surface is directly insulated or absorbed. [Example] Hereinafter, an example of this invention will be explained based on Figs. 2g1 to 8. @1 (2) - In Figure 8, the tank near the bottom plate 32 of the tank No. 11 or the bottom plate &
This is a soundproofing member that has 31 temporary and 1 mantissa.

The rest of the structure is the same as the conventional one shown in FIG. 12, and as it is #6, the explanation will be omitted.

With this structure, the noise T generated by the vibration of the tank bottom plate ~ propagates as shown by the arrow, is shielded by the soundproofing member H, and is transmitted between the tank bottom plate η and the floor surface 9. ! This prevents leakage from the gap lO to the outside.
Or it can be drastically reduced.

In this embodiment, the tank bottom plate 2 is the bottom plate! The soundproofing member attached to the tank side plate 31 near the tank side plate] 1 shows the ftIta that prevents noise, or the gap lO created between the tank bottom plate and the floor surface, as shown in Figures 4 to 6.
Even if the sound absorbing material 12 is inserted into the hole, a soundproofing effect can be obtained.

Here, the area of the outlet from the 6% magnetic induction equipment side to the outside in the gap 1 is changed to 81 and the gap 10 is the tank bottom plate area Tt.
Considering an 8m-long acoustic circuit, the impedance of the bottom plate of the tank is extremely large, resulting in a constant current sound source circuit as shown in Figure 7.

That is, at 8 in FIG. 7, TI is the radiation impedance from St, r- is the radiation impedance from 81, C is the acoustic capacitance of the gap IO, and rs is the resistance due to the sound absorbing material.

With this configuration, since the resistor T■ is connected in parallel with the radiation impedance TI, the combined impedance of s rs, rs and acoustic capacitance 0 is smaller than when T1 is not present (1 point) IG! :E sound pressure, that is, the noise radiated from 8I becomes smaller.

Also, when the distance between the tank bottom feather and the floor rin9 becomes 6 values, rlli! 1tIO causes a resonance phenomenon with the vibration of the tank bottom plate n, producing louder noise than normal. At times like this, sB! 3g, as shown in Section 9 (2), the gap 10 has dimensions that do not cause the dust noise phenomenon,
By inserting the structural member 13 that has a shape T, noise can be reduced by 86 degrees. Here, the shape of the structural member 13 is such that the gap 10 has a size and shape that does not cause a resonance phenomenon. (The shape is not limited to the one shown in the illustration.Furthermore, a structural member 14 like the one shown in FIG.
You can obtain Ia East's two swords that have both effect and noise insulation.

〔Effect of the invention〕

As described above, the sound reduction device for an electromagnetic inducer according to the present invention either covers the space created between the gap between the auxiliary Iy1 members of the tank bottom plate and the floor surface with a soundproofing material, or By placing sound-absorbing materials in the space, the noise generated in this space can be easily reduced without using large-scale soundproofing installations such as soundproofing walls.

[Brief explanation of the drawing]

1 to 8 are T-views showing an embodiment of the present invention. FIG. 1 is an exploded perspective view of the main part, FIG. 2 is a perspective view of the main part, and FIG. ■ Figures 4N to U in the diagrams of Guichi and Figures 4, 8,
@Figure 10 is an exploded perspective view of the main parts, Figures 5, 9, and 11 are perspective views of the main parts FiJ1 Figure 6 is a side view of Figure 5 Figure 12 is a side view of the conventional RL magnetic induction device's reduction device. In the figure, 1 is the inside of the main body, 2 is the insulating oil, and 3 is Main tank, 3
1 is the tank side plate, 32G:! Tank bottom plate, 7 is reinforcement meter,
9 is a floor surface, IO is a gap, 11 is a soundproofing member, 12 is a sound absorbing member, and 13 and 14 are cypress wood. Note that the same group numbers in Figure 1 indicate corresponding parts.

Claims (1)

[Claims] A main body tank that is placed on the floor and stores the contents of the main body together with insulating oil, a tank bottom plate that forms part of this main tank, reinforcing members attached to the outside of this tank bottom plate with a gap between each other, and this reinforcement. A sound reduction device for electromagnetic induction equipment, comprising a soundproof member arranged to shield a space formed between a gap between members and the floor surface, or a sound absorbing member arranged in the space.