Harmonic noise wave trap and low noise power transmission and transformation equipment box structure

Abstract

A harmonic noise notch filter includes: multiple elastic structures and multiple rigid structures spaced apart, wherein the cross-sectional area of ​​the elastic structures is smaller than that of the rigid structures, and the thickness of the elastic structures is greater than that of the rigid structures. This invention integrates elasticity and stiffness through the spaced elastic and rigid structures, thus better achieving the effect of filtering and noise reduction. This invention also provides a low-noise power transmission and transformation equipment enclosure structure, including: a hollow shell and a harmonic noise notch filter assembly disposed within the shell; the harmonic noise notch filter assembly includes harmonic noise notch filters connected in series by a series member fixed at one end within the shell; this invention, by placing the harmonic noise notch filter assembly within the sealed cavity, effectively isolates structural path noise generated by acoustic bridges.

Description

Technical Field

[0001] This invention relates to power transmission and transformation, and more specifically to a harmonic noise notch filter and a low-noise power transmission and transformation equipment enclosure structure. Background Technology

[0002] The enclosure of power transmission and transformation equipment is a protective enclosure for electrical equipment. During the structural design stage of the enclosure, the main considerations are control factors such as manufacturing process and mechanical performance. However, the distribution box will generate a lot of noise during operation. At present, the conventional method is to add a large soundproof enclosure, but this method is costly and takes up a lot of space. Some designs have taken noise problems into account, but they only add some soundproofing devices, and the noise reduction effect is still not ideal. Summary of the Invention

[0003] To address the unsatisfactory noise reduction effect of existing transformer technologies, this patent proposes a low-cost, flexible, and effective low-noise power transmission and transformation equipment enclosure structure, based on transformer enclosure design, thereby achieving a balance between the economic and environmental benefits of transformer noise reduction technology.

[0004] A harmonic noise notch filter includes: a plurality of elastic structures and a plurality of rigid structures spaced apart, wherein the cross-sectional area of ​​the elastic structures is smaller than the cross-sectional area of ​​the rigid structures, and the thickness of the elastic structures is greater than the thickness of the rigid structures.

[0005] Preferably, the rigid structure is plate-shaped.

[0006] Preferably, the elastic structure includes one or more of the following: a thin metal rod, a plate-shell type elastic metal structure with curvature, and a pressurized airbag made of low-damping and high-elasticity material.

[0007] Preferably, the number of elastic structures is one more than the number of rigid structures.

[0008] Preferably, the plurality of rigid structures are of different sizes.

[0009] A low-noise power transmission and transformation equipment enclosure structure includes: a hollow shell and a harmonic noise notch filter group disposed within the shell; the harmonic noise notch filter group includes multiple harmonic noise notch filters connected in series by a series member fixed at one end within the shell.

[0010] Each of the harmonic noise notch filters is fixed inside the housing.

[0011] Preferably, the outer casing includes: a housing wall, at least two reinforcing ribs, and at least one sealing plate;

[0012] The at least two reinforcing ribs are spaced apart on the outer surface of the box wall;

[0013] The at least one sealing plate is located between the two reinforcing ribs and forms at least one sealed cavity with the two reinforcing ribs and the box wall.

[0014] Preferably, one or more notch filter groups are provided in each cavity.

[0015] Preferably, the notch filter comprises: an elastic structure, a rigid structure, and an elastic structure spaced apart;

[0016] The elastic structure has a trapezoidal shape.

[0017] The upper bottom surface of the outermost elastic structure is connected to the box wall or sealing plate, and the lower bottom surface is connected to the rigid structure.

[0018] Preferably, the cavity also includes a vacuum getter;

[0019] The sealing plate is provided with air intake holes.

[0020] Preferably, the connecting element is a rope.

[0021] Preferably, both the box wall and the reinforcing ribs are made of steel plates.

[0022] Preferably, the sealing panel is made of a metal plate with ribs.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. This invention provides a harmonic noise notch filter, comprising: a plurality of elastic structures and a plurality of rigid structures spaced apart, wherein the cross-sectional area of ​​the elastic structure is smaller than that of the rigid structure, and the thickness of the elastic structure is greater than that of the rigid structure. This invention integrates elasticity and stiffness by using spaced elastic and rigid structures, thereby better achieving the effect of filtering and noise reduction.

[0025] 2. The present invention provides a low-noise power transmission and transformation equipment enclosure structure, comprising: a hollow shell and a harmonic noise notch filter group disposed within the shell; the harmonic noise notch filter group comprises harmonic noise notch filters connected in series by a series member fixed at one end within the shell; the present invention provides a harmonic noise notch filter group within the sealed cavity to effectively isolate structural path noise generated by acoustic bridges. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the enclosure structure of the low-noise power transmission and transformation equipment of the present invention;

[0027] Figure 2 This is a partial schematic diagram of the low-noise power transmission and transformation equipment enclosure structure of the present invention;

[0028] Figure 3This is a schematic diagram of the cavity interior of the low-noise power transmission and transformation equipment enclosure structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the elastic unit of the harmonic noise notch filter unit of the present invention when a thin metal rod is used;

[0030] Figure 5 This is a schematic diagram of the structure of the elastic unit of the harmonic noise notch filter unit of the present invention when it adopts a plate-shell type metal elastic structure with curvature.

[0031] Among them, 01-box wall, 02-reinforcing rib, 03-sealing panel, 04-rope, 05-air intake hole, 06-air getter, 10-harmonic noise trap, 11-first elastic unit, 12-first mass unit, 13-second elastic unit, 14-second mass unit, 15-third elastic unit. Detailed Implementation

[0032] This invention addresses the shortcomings of existing noise reduction measures for large reinforced enclosure structures, particularly for large power equipment in power transmission and transformation projects. It proposes a low-noise enclosure structure for power transmission and transformation equipment. This device is not only low in cost but also has a significant noise reduction effect, eliminating the need for large soundproof enclosures.

[0033] Example 1: A harmonic noise notch filter, such as Figure 4 As shown, it includes: multiple elastic structures and multiple rigid structures arranged at intervals, wherein the cross-sectional area of ​​the elastic structure is smaller than the cross-sectional area of ​​the rigid structure, and the thickness of the elastic structure is greater than the thickness of the rigid structure.

[0034] Preferably, the rigid structure is plate-shaped and composed of a rigid structure with high material density. It can be a solid steel structure (such as cast iron parts) or a stone material with a high-strength metal frame.

[0035] Preferably, the elastic structure includes one or more of the following: a thin metal rod, a plate-shell type metal elastic structure with curvature, and a pressurized airbag made of low-damping and high-elasticity material; wherein the metal rod is a reinforced aluminum alloy rod structure; the plate-shell type metal elastic structure with curvature is preferably a hemispherical steel shell;

[0036] Preferably, the number of elastic structures is one more than the number of rigid structures.

[0037] Preferably, the plurality of rigid structures are of different sizes.

[0038] The rigid structure here is equivalent to the first mass unit 12 and the second mass unit 14 in the figure; the elastic structure is equivalent to the first elastic unit 11, the second elastic unit 13, and the third elastic unit 15 in the figure.

[0039] Example 2:

[0040] A low-noise power transmission and transformation equipment enclosure structure includes: a hollow shell and a harmonic noise notch filter group disposed within the shell; the harmonic noise notch filter group includes a plurality of harmonic noise notch filters connected in series by a series member fixed at one end within the shell, as shown in Embodiment 1.

[0041] Each of the harmonic noise notch filters is fixed inside the housing.

[0042] Preferably, the outer casing includes: a housing wall 01, at least two reinforcing ribs 02, and at least one sealing plate 03;

[0043] At least two reinforcing ribs 02 are spaced apart on the outer surface of the box wall 01;

[0044] The at least one sealing plate 03 is located between the two reinforcing ribs 02, and forms at least one sealed cavity with the two reinforcing ribs 02 and the box wall 01.

[0045] Preferably, one or more notch filter groups are provided in each cavity.

[0046] Preferably, the notch filter comprises: an elastic structure, a rigid structure, and an elastic structure spaced apart;

[0047] The elastic structure has a trapezoidal shape.

[0048] The upper bottom surface of the outermost elastic structure is connected to the box wall or sealing plate, and the lower bottom surface is connected to the rigid structure. The elastic structure here is equivalent to the first elastic unit 11, the second elastic unit 13, and the third elastic unit 15; the rigid structure is equivalent to the first mass unit 12 and the second mass unit 14.

[0049] Preferably, the cavity also includes a vacuum getter 06;

[0050] The sealing plate is provided with an air intake hole 05.

[0051] Preferably, the connecting element is a rope 04.

[0052] Preferably, both the box wall 01 and the reinforcing rib 02 are made of steel plate.

[0053] Preferably, the sealing panel 03 is a metal plate with ribs.

[0054] A low-noise power transmission and transformation equipment enclosure structure, such as Figure 1 and Figure 2 As shown, it includes:

[0055] Box wall 01, which is used to house electrical equipment;

[0056] Multiple reinforcing ribs 02 are located on the surface of the box wall 01 and are used to reinforce the box wall 01;

[0057] Multiple sealing panels 03 are respectively installed between two adjacent reinforcing ribs 02 of the outer shell, and are parallel to the box wall 01 between the reinforcing ribs 02, so as to form a sealed cavity after being combined with the box wall 01 and the reinforcing ribs 02;

[0058] Multiple harmonic noise notch filter groups, each harmonic noise notch filter group is installed in the cavity between each sealing panel 03 and the enclosure wall 01, to isolate the harmonic noise of the enclosure wall 01;

[0059] The harmonic noise notch filter group comprises multiple uniformly distributed harmonic noise notch filter units.

[0060] The harmonic noise notch filter unit is composed of an elastic structure, a rigid structure, and an elastic structure connected in series in an alternating manner. Here, the elastic structure can also be called an elastic unit, and the rigid structure can also be called a mass unit.

[0061] The harmonic noise notch filter unit comprises N mass units and N+1 elastic units (N>1). One end of the first elastic unit 11 is connected to the housing wall 01, and the other end of the first elastic unit 11 is connected to the first mass unit 12. One end of the Nth elastic unit is connected to one end of the (N-1)th mass unit, and the other end of the Nth elastic unit is connected to one end of the Nth mass unit. One end of the N+1th elastic unit is connected to the Nth mass unit, and the other end of the N+1th elastic unit is connected to the sealing panel.

[0062] The box wall 01 and reinforcing ribs 02 are made of steel plates, and the sealing panel 03 is made of high-strength metal plates, preferably 2mm steel plates.

[0063] The mass unit of the harmonic noise notch filter unit consists of a rigid structure with high material density, which can be a solid steel structure, preferably cast iron, or stone with a high-strength metal frame.

[0064] The elastic unit of the harmonic noise notch filter unit is composed of a highly elastic, low-damping structure, which can be a thin metal rod, preferably a reinforced aluminum alloy rod structure, or a plate-shell type elastic metal structure with curvature, such as... Figure 5 As shown, a hemispherical steel shell is preferred, or a pressurized airbag is made of low-damping, high-elasticity material.

[0065] The notch attenuation poles of the harmonic noise notch filter unit match the harmonic noise frequencies that the power equipment inside the casing needs to control.

[0066] The sealing panel 03 can also be a metal plate with ribs, and the ribs include multiple ribs perpendicular to the reinforcing ribs 02.

[0067] The sealing panel 03 is equipped with an air suction hole 05, which is used to remove air from the sealed cavity formed by the sealing panel 03, the box wall 01 and the reinforcing rib 02.

[0068] Each independent double-layered sealed space should also contain a small amount of vacuum getter 06.

[0069] The harmonic noise notch filter is hoisted in series via rope 04, as follows: Figure 3 As shown.

[0070] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A harmonic noise trap, characterized by include: Multiple elastic structures and multiple rigid structures are arranged at intervals, wherein the cross-sectional area of ​​the elastic structure is smaller than that of the rigid structure, and the thickness of the elastic structure is greater than that of the rigid structure; The rigid structure is plate-shaped; The elastic structure includes one or more of the following: a thin metal rod, a plate-shell type elastic metal structure with an arc, and a pressurized airbag made of low-damping and high-elasticity materials. The multiple rigid structures are of different sizes; The rigid structure is a high-density rigid structure; The outermost two ends of the harmonic noise notch filter along the arrangement direction are both elastic structures.

2. The harmonic noise trap of claim 1, wherein, The number of elastic structures is one more than the number of rigid structures.

3. A low-noise power transmission and transformation equipment enclosure structure, characterized in that, include: A hollow housing and a harmonic noise notch filter assembly disposed within the housing; The harmonic noise notch filter group includes a plurality of harmonic noise notch filters as described in any one of claims 1-2, which are connected in series by a series member fixed at one end inside the housing. Each of the harmonic noise notch filters is fixed inside the housing; The outer casing includes: a housing wall, at least two reinforcing ribs, and at least one sealing plate; The at least two reinforcing ribs are spaced apart on the outer surface of the box wall; The at least one sealing plate is located between two reinforcing ribs and forms at least one sealed cavity with the two reinforcing ribs and the box wall; The connecting element is a rope.

4. The low-noise power transmission and transformation equipment enclosure structure as described in claim 3, characterized in that, One or more notch filter groups are installed in each cavity.

5. The low-noise power transmission and transformation equipment enclosure structure as described in claim 4, characterized in that, The notch filter includes: an elastic structure, a rigid structure, and an elastic structure spaced apart; The elastic structure has a trapezoidal shape. The upper bottom surface of the outermost elastic structure is connected to the box wall or sealing plate, and the lower bottom surface is connected to the rigid structure.

6. The low-noise power transmission and transformation equipment enclosure structure as described in claim 3, characterized in that, The cavity also includes a vacuum getter; The sealing plate is provided with air intake holes.

7. The low-noise power transmission and transformation equipment enclosure structure as described in claim 3, characterized in that, The box wall and the reinforcing ribs are both made of steel plate.

8. The low-noise power transmission and transformation equipment enclosure structure as described in claim 3, characterized in that, The sealing plate is made of a metal plate with reinforcing ribs.

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