CN114093664B - Filter capacitor - Google Patents
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- CN114093664B CN114093664B CN202111360195.7A CN202111360195A CN114093664B CN 114093664 B CN114093664 B CN 114093664B CN 202111360195 A CN202111360195 A CN 202111360195A CN 114093664 B CN114093664 B CN 114093664B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 96
- 238000013016 damping Methods 0.000 claims abstract description 56
- 238000002955 isolation Methods 0.000 claims abstract description 16
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 18
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 12
- 239000011148 porous material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 239000002470 thermal conductor Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 16
- 229920000742 Cotton Polymers 0.000 description 6
- 239000004020 conductor Substances 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/08—Cooling arrangements; Heating arrangements; Ventilating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/10—Housing; Encapsulation
- H01G2/106—Fixing the capacitor in a housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/302—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/16—Capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Multimedia (AREA)
- Filters And Equalizers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to a filter capacitor, which comprises a capacitor shell, a capacitor element, an incoming line, an outgoing line, a vibration isolation connecting part and a vibration damping and noise reducing device, wherein the capacitor element is arranged in the capacitor shell and is connected with the capacitor shell through the vibration damping and noise reducing device, the incoming line and the outgoing line are both flexible wires, and the vibration isolation connecting part is arranged outside the capacitor shell and is fixedly connected with the capacitor shell. It can block vibration transmission and noise propagation inside the filter capacitor.
Description
Technical Field
The invention relates to the technical field of filter capacitors, in particular to a filter capacitor.
Background
When the unbalanced electric field force passes through the capacitor, the internal components of the capacitor can vibrate. The reports of CIGRE and IEC are relevant to note that the filter capacitor of the high voltage converter station can hear noise up to 105dB (a) at the highest, which is severely beyond the specified standards. The long-term excessive vibration can also cause great damage to the capacitor body structure, the service life of the capacitor body structure is seriously shortened, even faults are caused, and huge economic loss is caused.
At present, noise reduction is carried out on a filter capacitor by widely adopting a sound insulation cover or a method of filling sound insulation cotton in the sound insulation cover, but the sound insulation cover is relatively heavy, uncertain factors are brought to the stability of a filter capacitor tower, and the noise reduction effect of the sound insulation cotton filled in the filter capacitor tower is relatively limited. Patent document CN214588463U discloses a noise reduction device for a power filter capacitor, which comprises a base and a cylinder body with an opening at the lower part; the cylinder body is covered on the base to form a closed structure for placing the power filter capacitor, the side wall and the top wall of the cylinder body are internally provided with a sound insulation cavity communicated with each other, and the top wall of the cylinder body is provided with two through holes for the conductive columns of the power filter capacitor to extend out; and a rubber ring for sleeving the periphery of the conductive column is arranged in each through hole, and the rubber ring is connected with the inner wall of each through hole through an elastic sealing material. The technical scheme has a certain noise reduction effect, but the requirement is difficult to meet when the technical scheme is used alone.
Disclosure of Invention
An object of the present invention is to provide a filter capacitor to block vibration transmission and noise propagation inside the filter capacitor.
The technical scheme of the invention is as follows:
the utility model provides a filter capacitor, includes capacitor case, capacitor element, inlet wire, is qualified for the next round of competitions, vibration isolation connecting portion and damping and falls the device of making an uproar, capacitor element sets up in the capacitor case and pass through damping fall the device of making an uproar with capacitor case connects, inlet wire and outlet wire are the flexible conductor, vibration isolation connecting portion set up capacitor case foreign side and with capacitor case fixed connection.
Preferably, the flexible conductor is a flexible copper wire.
Preferably, the device of making an uproar falls in damping includes that the device of making an uproar falls in the lead terminal damping, the device of making an uproar falls in the lead terminal damping includes soft sound absorbing layer, stereoplasm sound absorbing layer and the elasticity damping layer that sets up in order, soft sound absorbing layer is close to the capacitor shell sets up, the elasticity damping layer is close to the capacitor element sets up.
Preferably, the device of making an uproar falls in damping includes that the device of making an uproar falls in non-lead terminal damping, the device of making an uproar falls in non-lead terminal damping includes vacuum puigging, soft sound absorbing layer, stereoplasm sound absorbing layer and the elastic vibration damping layer that sets up in order, vacuum puigging is close to the capacitor shell sets up, the elastic vibration damping layer is close to capacitor element sets up.
More preferably, the soft sound absorbing layer is made of sound absorbing cotton.
Further preferably, the hard sound absorbing layer is a porous sound absorbing plate.
Further preferably, the elastic damping layer is a polyurethane elastomer.
Still more preferably, the polyurethane elastomer has a closed cell content of 93% to 96%.
Still further preferably, an insulating heat conduction layer is further disposed between the elastic vibration damping layer and the capacitor element, the capacitor case is a heat conductor, and the insulating heat conduction layer is connected to the capacitor case in a heat conduction manner.
Preferably, the vibration-damping and noise-reducing device is composed of a lead-end vibration-damping and noise-reducing device and a non-lead-end vibration-damping and noise-reducing device, and the vibration-isolating connection portion is provided at a side portion between the lead-end vibration-damping and noise-reducing device and the non-lead-end vibration-damping and noise-reducing device.
Preferably, the vibration isolation connecting part comprises a first end shell, a second end shell, a damping spring and a polyurethane elastomer, the first end shell and the second end shell are movably connected in the connecting direction, one end of the damping spring is fixedly connected with the first end shell, the other end of the damping spring is fixedly connected with the second end shell, and the polyurethane elastomer is filled in a cavity among the first end shell, the second end shell and the damping spring.
The beneficial effects of the invention are:
1. the incoming line and the outgoing line of the filter capacitor are set as flexible wires, so that the effect of transmitting vibration to the outside through the incoming line and the outgoing line is weakened; the vibration and noise reduction device reduces the vibration transmission effect and the sound transmission effect between the capacitor element and the capacitor shell; the vibration isolation connecting part reduces the vibration transmission effect of the capacitor shell and the support while realizing the fixation of the capacitor shell and the support.
2. The elastic vibration damping layer is arranged close to the capacitor element for the purpose of damping vibration and then silencing, so that the sound wave energy generated by the capacitor element can be reduced. The hard sound absorption layer not only has sound absorption effect, but also can distribute vibration impact transmitted by the elastic vibration reduction layer. The sound absorbing material is different from the sound insulating material in that: the sound insulation material reduces the sound transmittance by reflecting sound waves; sound absorbing materials reduce sound transmission through dissipation of sound wave energy. The vibration source of the filter capacitor is mainly applied to the lead terminals and the non-lead terminals of the capacitor case, and the side vibration thereof is relatively small. The use of the soundproof layer allows sound waves transmitted in the end direction to pass through the side surface, and is not useful for noise reduction.
3. The sound absorption effect of the sound absorption cotton is good, and the higher the aperture ratio is, the better the sound absorption effect is. But its elasticity is poor, so that the elastic damping layer is required to damp.
4. The porous sound-absorbing plate can absorb sound, and the hard characteristic of the porous sound-absorbing plate can distribute vibration impact transmitted by the elastic vibration-absorbing layer.
5. When the polyurethane is used as an elastomer, the higher the closed cell ratio, the better the elasticity.
6. The polyurethane elastomer with the closed-cell rate of 93-96% can give consideration to both the sound wave reflectivity and the elasticity. When the closed porosity exceeds 96%, a large amount of sound is transmitted from the side of the filter capacitor, and the sound wave energy absorbed by the soft sound absorbing layer is small. When the closed porosity is less than 93%, the polyurethane elastomer has poor elastic effect and poor vibration damping effect, so that excessive vibration is transmitted to the soft sound absorption layer to compress pores in the soft sound absorption layer, thereby causing poor sound absorption effect.
7. The polyurethane elastomer has a heat insulation effect, and the heat insulation and conduction layer is arranged between the elastic vibration reduction layer and the capacitor element, so that the heat dissipation effect of the filter capacitor can be improved.
8. The vibration isolation connecting part is arranged on the side between the lead end vibration reduction and noise reduction device and the non-lead end vibration reduction and noise reduction device, so that the lateral shaking range of the filter capacitor under the vibration effect can be reduced, and the service life of the filter capacitor is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a filter capacitor.
Fig. 2 is a schematic structural view of a vibration isolation connection portion of a filter capacitor.
Reference numerals indicate, 1-a capacitor case, 2-a capacitor element, 31-an inlet wire, 32-an outlet wire, 4-a lead terminal vibration and noise reduction device, 41-a first soft sound absorbing layer, 42-a first hard sound absorbing layer, 43-a first elastic vibration absorbing layer, 5-a non-lead terminal vibration and noise reduction device, 51-a vacuum sound insulating layer, 52-a first soft sound absorbing layer, 53-a first hard sound absorbing layer, 54-a first elastic vibration absorbing layer, 6-a vibration isolation connecting portion, 61-a first end case, 62-a second end case, 63-a damping spring, 64-a polyurethane elastomer.
Detailed Description
The present invention is described below in terms of embodiments in conjunction with the accompanying drawings to assist those skilled in the art in understanding and implementing the present invention. Unless otherwise indicated, the following embodiments and technical terms therein should not be understood to depart from the background of the technical knowledge in the technical field.
Example 1: the utility model provides a filter capacitor, refers to fig. 1, and including capacitor case 1, capacitor element 2, inlet wire 31, play line 32, vibration isolation connecting portion 6 and damping and noise reduction device, capacitor element 2 sets up in capacitor case 1, and capacitor element 2 falls the device of making an uproar through the damping and is connected with capacitor case 1, and inlet wire 31 and play line 32 are flexible conductor, and vibration isolation connecting portion 6 sets up in capacitor case 1 outsidely, vibration isolation connecting portion 6 and capacitor case 1 fixed connection.
In this embodiment, the flexible conductor is a flexible copper wire.
In this embodiment, the vibration-damping and noise-reducing device is composed of a lead-end vibration-damping and noise-reducing device 4 and a non-lead-end vibration-damping and noise-reducing device 5, and the vibration-isolating connecting portion 6 is provided in a lateral direction between the lead-end vibration-damping and noise-reducing device 4 and the non-lead-end vibration-damping and noise-reducing device 6.
In this embodiment, the lead-end vibration-damping noise-reducing device 4 includes a first soft sound-absorbing layer 41, a first hard sound-absorbing layer 42, and a first elastic vibration-damping layer 43, which are sequentially provided, the first soft sound-absorbing layer 41 being provided adjacent to the capacitor case 1, and the first elastic vibration-damping layer 43 being provided adjacent to the capacitor element 2.
Wherein, the first soft sound-absorbing layer 41 is made of sound-absorbing cotton. The first rigid sound absorbing layer 42 is selected from a porous sound absorbing sheet. The first elastic damping layer 43 is selected from polyurethane elastomers. The closed pore rate of the polyurethane elastomer is 93-96%.
In this embodiment, the non-lead-end vibration/noise reduction device 2 includes a vacuum sound insulation layer 51, a second soft sound absorption layer 52, a second hard sound absorption layer 53, and a second elastic vibration reduction layer 54, which are sequentially provided, the vacuum sound insulation layer 51 being provided adjacent to the capacitor case 1, and the second elastic vibration reduction layer 54 being provided adjacent to the capacitor element 2.
Wherein, the second soft sound-absorbing layer 52 is made of sound-absorbing cotton. The second rigid sound-absorbing layer 53 is selected from a porous sound-absorbing sheet. The second elastomeric damping layer 54 is selected from polyurethane elastomers. The closed pore rate of the polyurethane elastomer is 93-96%.
In order to enhance the heat dissipation effect of the filter capacitor, a first insulating heat conduction layer (not shown) is further disposed between the first elastic damping layer 43 and the capacitor element 2, the capacitor case 1 is a heat conductor, and the first insulating heat conduction layer is in heat conduction connection with the capacitor case 1. A second insulating and thermally conductive layer (not shown) is also arranged between the second elastic damping layer 54 and the capacitor element 2, which second insulating and thermally conductive layer is thermally conductively connected to the capacitor housing 1. Common insulating heat-conducting layers include heat-conducting silica gel sheets and non-silicon heat-conducting pads.
In this embodiment, referring to fig. 2, the vibration isolation connecting portion 6 includes a first end shell 61, a second end shell 62, a damping spring 63, and a polyurethane elastomer 64, where the first end shell 61 and the second end shell 62 are movably connected in a connecting direction, one end of the damping spring 63 is fixedly connected to the first end shell 61, the other end is fixedly connected to the second end shell 62, and the polyurethane elastomer 64 is filled in a cavity between the first end shell 61, the second end shell 62, and the damping spring 63. The first end case 61 is fixedly connected to the capacitor case 61.
The invention is described in detail above with reference to the figures and examples. It should be understood that in practice the description of all possible embodiments is not exhaustive and that the inventive concepts are described herein as far as possible by way of illustration. Without departing from the inventive concept of the present invention and without any creative work, a person skilled in the art should, in all of the embodiments, make optional combinations of technical features and experimental changes of specific parameters, or make a routine replacement of the disclosed technical means by using the prior art in the technical field to form specific embodiments, which belong to the content implicitly disclosed by the present invention.
Claims (5)
1. A filter capacitor comprises a capacitor shell, a capacitor element, an incoming line and an outgoing line, and is characterized by further comprising a vibration isolation connecting part and a vibration damping and noise reducing device, wherein the capacitor element is arranged in the capacitor shell and is connected with the capacitor shell through the vibration damping and noise reducing device;
the vibration and noise reduction device comprises a lead end vibration and noise reduction device, the lead end vibration and noise reduction device comprises a first soft sound absorption layer, a first hard sound absorption layer and a first elastic vibration reduction layer which are sequentially arranged, the first soft sound absorption layer is arranged close to the capacitor shell, and the first elastic vibration reduction layer is arranged close to the capacitor element;
the vibration and noise reduction device comprises a non-lead-end vibration and noise reduction device, the non-lead-end vibration and noise reduction device comprises a vacuum sound insulation layer, a second soft sound absorption layer, a second hard sound absorption layer and a second elastic vibration reduction layer which are sequentially arranged, the vacuum sound insulation layer is arranged close to the capacitor shell, and the second elastic vibration reduction layer is arranged close to the capacitor element;
the first elastic vibration damping layer and the second elastic vibration damping layer are both first polyurethane elastomers, and the closed pore rate of the first polyurethane elastomers is 93-96%;
the vibration isolation connecting part is arranged on the side between the lead end vibration and noise reduction device and the non-lead end vibration and noise reduction device;
the vibration isolation connecting part comprises a first end shell, a second end shell, a damping spring and a second polyurethane elastomer, the first end shell is movably connected with the second end shell in the connecting direction, one end of the damping spring is fixedly connected with the first end shell, the other end of the damping spring is fixedly connected with the second end shell, and the second polyurethane elastomer is filled in a cavity between the first end shell and the second end shell and between the damping spring.
2. The filter capacitor of claim 1, wherein the pigtails are copper pigtails.
3. The filter capacitor of claim 1, wherein said first rigid sound absorbing layer and said second rigid sound absorbing layer are both porous sound absorbing sheets.
4. The filter capacitor of claim 1 further comprising an insulating and thermally conductive layer between the elastomeric damping layer and the capacitor element, wherein the capacitor case is a thermal conductor, and wherein the insulating and thermally conductive layer is thermally coupled to the capacitor case.
5. The filter capacitor of claim 1, wherein the vibration and noise reducing means is comprised of lead-end vibration and noise reducing means and non-lead-end vibration and noise reducing means.
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CN202111360195.7A CN114093664B (en) | 2021-11-17 | 2021-11-17 | Filter capacitor |
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CN202111360195.7A CN114093664B (en) | 2021-11-17 | 2021-11-17 | Filter capacitor |
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CN114093664B true CN114093664B (en) | 2023-01-20 |
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CN202405109U (en) * | 2011-11-29 | 2012-08-29 | 安徽赛福电子有限公司 | Shake-proof locomotive capacitor |
CN205428699U (en) * | 2016-04-01 | 2016-08-03 | 重庆水利电力职业技术学院 | Power capacitor mounting structure of transformer substation assembly |
CN107588151A (en) * | 2017-09-07 | 2018-01-16 | 长沙小新新能源科技有限公司 | Wind power generation plant |
CN110767446A (en) * | 2019-11-05 | 2020-02-07 | 国家电网有限公司 | Noise reduction device and noise reduction method for power filter capacitor |
CN212783076U (en) * | 2020-06-19 | 2021-03-23 | 深圳市鑫华琪科技有限公司 | Anti-interference capacitor of metallized polyester film |
CN213691427U (en) * | 2020-11-17 | 2021-07-13 | 中国矿业大学(北京) | Multistage noise reduction device for high-voltage filter capacitor |
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