CN210015772U

CN210015772U - Sound insulation transformer iron core

Info

Publication number: CN210015772U
Application number: CN201921161518.8U
Authority: CN
Inventors: 李丽; 樊小鹏; 唐念; 邹庄磊
Original assignee: Guangdong Power Grid Co Ltd; Electric Power Research Institute of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Electric Power Research Institute of Guangdong Power Grid Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-02-04
Anticipated expiration: 2029-07-23

Abstract

The application discloses a sound insulation transformer iron core which comprises an iron core frame, a binding band and a sound insulation plate; the sound insulation plate is arranged at the bottom of the lower iron yoke of the iron core frame; the binding band binds the lap joint of the sound insulation board and the lower iron yoke. Above-mentioned transformer core gives sound insulation has reduced down yoke department because the clearance between folding, overlap joint drunkenness through passing through the bandage with the acoustic celotex board in the lower yoke department of iron core frame to the vibration that leads to is big and the noise volume that produces. Because the noise of iron core often is through the transmission of iron core backing foot, with the acoustic celotex board ligature in the bottom of iron yoke down, still produce isolation effect in the vibration transmission process, further reduced the noise. Therefore, the sound insulation transformer iron core that this application embodiment provided has solved the not good technical problem of noise reduction effect for prior art, has reached the purpose of making an uproar of falling.

Description

Sound insulation transformer iron core

Technical Field

The application relates to the technical field of transformer cores, in particular to a sound insulation transformer core.

Background

With the high-speed growth of population, the power supply demand of residents is increased greatly, so that a large number of high-voltage-class transformers go deep into the centers of the residents, particularly 10kV distribution transformers. These transformers are usually installed in transformer rooms outside residential buildings, but for various reasons such as land price, many real estate developers install the transformer rooms in basements or first floors of residential buildings, so that noise and vibration generated during normal operation of the transformer rooms cause great troubles to low-rise residents, and the complaint amount is rising year by year.

The transformer mainly generates low-frequency noise, the low-frequency noise has great influence on the body and mind of residents, and the low-frequency noise is easy to have adverse effects such as insomnia, anxiety and the like in a noise environment for a long time. At present, noise control mainly comprises three aspects of sound source, propagation path and human ear. And control from the source is undoubtedly the most valuable method. In source control for distribution transformers, four insulation panels are usually fixed to the outer wall of the core limb and covered with an insulating tape. The noise is usually transmitted to the clamping piece through the iron core foot pad and then is uniformly emitted to the periphery in the form of sound wave, and the noise is reduced through the sound insulation plate on the outer wall of the iron core, so that the noise control effect cannot be well played.

Therefore, how to design a sound insulation transformer core to achieve a better noise reduction effect is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a transformer core gives sound insulation, solves the current not good problem of transformer sound insulation effect.

In view of the above, the present application provides a sound insulation transformer core, including a core frame, a strap, and a sound insulation plate;

the sound insulation plate is arranged at the bottom of the lower iron yoke of the iron core frame;

the binding band binds the overlapping part of the sound insulation board and the lower iron yoke.

Preferably, the acoustic baffle is further arranged between adjacent side columns of the iron core frame, and the adjacent side columns of the iron core frame are bound through the binding bands.

Preferably, the acoustic baffle is further disposed at left and right sides of the side post of the adjacent core frame, and the acoustic baffle at the left and right sides is fixed at two sides of the adjacent side post through a binding band.

Preferably, the sound insulation boards are also arranged at the front side and the rear side of the adjacent side columns;

the left and right sides acoustic celotex board with the front and back both sides acoustic celotex board constitutes the rectangle frame with end to end overlap joint's form, the rectangle frame will be adjacent including the side post wraps up, the acoustic celotex board passes through the bandage ligature is fixed.

Preferably, the strap surface of the strap is perpendicular to the core frame.

Preferably, the sound insulation board is a silicone rubber board.

Preferably, the strap is a polyester strapping strap.

Compared with the prior art, the embodiment of the application has the advantages that:

in the embodiment of the application, the sound insulation transformer iron core comprises an iron core frame, a binding band and a sound insulation plate; the sound insulation plate is arranged at the bottom of the lower iron yoke of the iron core frame; the binding band binds the lap joint of the sound insulation board and the lower iron yoke. The utility model provides a transformer core gives sound insulation has reduced down yoke department because the clearance between folding, overlap joint drunkenness through passing through the bandage ligature with the acoustic celotex board in the lower yoke department of iron core frame to lead to vibrating greatly and the noise volume that produces. Because the noise of iron core often is through the transmission of iron core backing foot, with the acoustic celotex board ligature in the bottom of iron yoke down, still produce isolation effect in the vibration transmission process, further reduced the noise. Therefore, the sound insulation transformer iron core that this application embodiment provided has solved the not good technical problem of noise reduction effect for prior art, has reached the purpose of making an uproar of falling.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a front view of a sound-proofing transformer core provided by an embodiment of the present application;

fig. 2 is a bottom view of a sound-proofing transformer core provided in an embodiment of the present application;

fig. 3 is a left side view of a sound isolating transformer core provided by an embodiment of the present application;

fig. 4 is a cross-sectional view of adjacent core frame legs of a soundproofing transformer core according to an embodiment of the present application.

Reference numerals: side column 1, bandage 2, acoustic celotex board 3, lower yoke 4.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 to 4, fig. 1 is a front view of a transformer core for sound insulation according to an embodiment of the present disclosure; fig. 2 is a bottom view of a sound-proofing transformer core provided in an embodiment of the present application; fig. 3 is a left side view of a sound isolating transformer core provided by an embodiment of the present application; fig. 4 is a cross-sectional view of adjacent core legs of a soundproofing transformer core according to an embodiment of the present application.

The transformer core that gives sound insulation that this application embodiment provided includes: iron core frame, bandage 2 and acoustic celotex board 3.

The noise insulation plate 3 is provided at the bottom of the lower yoke 4 of the core frame. The binding band 2 binds the overlapping part of the sound insulation board 3 and the lower iron yoke 4. It should be noted that the iron core mostly adopts a form of overlapping the coils, and this part is one of the main sources of the noise of the iron core. Because the iron core at the position has a larger gap and larger magnetic resistance, in order to reduce the vibration generated by the action of electromagnetic force between the sheets, the gap between the laminations needs to be reduced as much as possible, namely the lap seam of the transformer iron core needs to be reduced as much as possible, so that the magnetic resistance is reduced, magnetic lines of force can smoothly pass through the seam, and the vibration is reduced. According to the test result, the control of the inter-chip gap is very beneficial to reducing the noise, and the method can reduce the noise by at least 2dB to 3 dB.

The utility model provides a transformer core gives sound insulation, with acoustic celotex board 3 through 2 ligatures of bandage 4 departments in the lower yoke of iron core frame, reduced down yoke 4 department because fold the clearance, lap joint position drunkenness to lead to vibrating the big and noise volume that produces. Because the noise of iron core often is through the transmission of iron core backing foot, with acoustic celotex board 3 ligature in the bottom of iron yoke 4 down, still produce isolation effect in the vibration transmission process, further reduced the noise. Therefore, the sound insulation transformer iron core that this application embodiment provided has solved the not good technical problem of noise reduction effect for prior art, has reached the purpose of making an uproar of falling.

Further, because transformer core is a plurality of iron core frames again and is constituteed, in order to prevent effectively that the contact site collision of adjacent iron core frame from producing the noise in the course of the work, can set up acoustic celotex board 3 between the side column 1 of adjacent iron core frame to pass through bandage 2 ligatures with adjacent side column 1. I.e. with the acoustic panel 3 interposed between the two core frames.

Preferably, because the side post 1 of iron core frame is also through the lap joint of batching, consequently can also set up acoustic celotex board 3 in the left and right sides of adjacent side post 1 to pass through bandage 2 ligature on the side post with the acoustic celotex board 3 of this left and right sides, fix adjacent side post 1, reduce the clearance between the batching on the side post, and the noise that isolated side post produced.

More preferably, for preventing the roll sheet drunkenness of roll sheet overlap joint on the side post, can also set up acoustic celotex board 3 in adjacent iron core frame side post 1 front and back both sides, the acoustic celotex board 3 of the left and right sides and the acoustic celotex board 3 of front and back both sides constitute the rectangle frame with end to end lapped form, the rectangle frame with adjacent iron core frame side post 1 parcel including, and fixed through the ligature of bandage 2, restricted iron core frame roll sheet around with control the displacement, and give sound insulation. With the acoustic celotex board 3 with constituting rectangle frame arrangement mode setting and can make overall structure more stable, also change in the ligature of bandage 2, can effectively prevent the drunkenness of iron core frame, restrain the iron core vibration. According to the test result, the properly bound iron core can reduce the noise by at least 1dB to 2 dB.

It will be appreciated that the strap faces of the straps 2 are perpendicular to the core frame, and as shown in figure 1, the straps 2 are tied transversely on the side posts 1 and longitudinally at the lower yokes 4, which further enhances the tying effect.

Specifically, the method comprises the following steps: the acoustic panel 3 is a silicone rubber sheet: the silicon rubber plate has good insulation and vibration isolation functions, good flexibility, capability of reducing the influence of external force on the iron core and increasing the vibration resistance of the iron core, does not need to be additionally provided with other insulation materials, has an anti-skidding function and has a control effect on displacement caused by the vibration of the iron core; the binding band is specifically a polyester packing band: the polyester packing belt has high tensile strength and heat resistance index and large binding force.

Specifically, the sound insulation transformer iron core is specifically applied to amorphous alloy distribution transformers.

It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound insulation transformer iron core is characterized by comprising an iron core frame, a binding band and a sound insulation plate;

2. The soundproof transformer core according to claim 1, wherein the soundproof plate is further provided between the side columns of the adjacent core frames, and the side columns of the adjacent core frames are bound by the binding band.

3. The soundproof transformer core according to claim 1, wherein the soundproof plates are further provided on left and right sides of the side columns of the adjacent core frames, and the soundproof plates on the left and right sides are fixed to both sides of the adjacent side columns by a binding band.

4. The soundproof transformer core according to claim 3, wherein the soundproof plates are further provided on front and rear sides of the adjacent side columns;

5. A soundproof transformer core according to any one of claims 1 to 3, wherein a band face of said strap is perpendicular to said core frame.

6. Soundproofing transformer core according to claim 1, characterised in that the soundproofing sheet is in particular a silicone rubber sheet.

7. The soundproof transformer core according to claim 1, wherein the straps are specifically polyester strapping bands.