CN210110534U - Power capacitor and vibration and noise reduction device thereof - Google Patents
Power capacitor and vibration and noise reduction device thereof Download PDFInfo
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- CN210110534U CN210110534U CN201921053543.4U CN201921053543U CN210110534U CN 210110534 U CN210110534 U CN 210110534U CN 201921053543 U CN201921053543 U CN 201921053543U CN 210110534 U CN210110534 U CN 210110534U
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- bottom plate
- sleeve
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- capacitor
- core
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- 239000003990 capacitor Substances 0.000 title claims abstract description 73
- 230000009467 reduction Effects 0.000 title claims abstract description 25
- 238000002955 isolation Methods 0.000 claims abstract description 19
- 239000013013 elastic material Substances 0.000 claims abstract description 3
- 238000013016 damping Methods 0.000 claims description 32
- 238000009413 insulation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229910000906 Bronze Inorganic materials 0.000 claims description 2
- 229910052790 beryllium Inorganic materials 0.000 claims description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010974 bronze Substances 0.000 claims description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract 1
- 229920001967 Metal rubber Polymers 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The utility model provides a power capacitor and a vibration and noise reduction device thereof, wherein the vibration and noise reduction device is arranged between a capacitor core and a box body corresponding to the upper end surface and the lower end surface of the capacitor core, and comprises a core bracket for bearing the capacitor core, a bottom plate arranged on the box body and a plurality of vibration isolation devices arranged between the core bracket and the bottom plate; the vibration isolation device includes: the sleeve is fixedly arranged on the bottom plate and is provided with a hollow pipe cavity; the spring piece is made of elastic materials, covers the tube cavity, is fixedly arranged on the sleeve at the edge, and has a matching structure in the middle area surrounded by the edge; and the connecting shaft is matched with the matching structure in an installing manner, and the top end of the connecting shaft is connected with the core bracket. The spring piece has higher radial rigidity and lower axial rigidity, so that the problem that the original capacitor core is suspended and collided in oil is avoided; and the structure and the viscous effect of oil liquid are utilized to play a good role in vibration isolation and vibration reduction, and finally the purpose of noise reduction is achieved.
Description
Technical Field
The utility model relates to a power equipment technical field, concretely relates to power capacitor and device of making an uproar falls in damping thereof.
Background
With the continuous investment and research and development of high-voltage and extra-high-voltage transmission projects in China, more and more high-voltage and extra-high-voltage transmission projects are founded. In the whole high-voltage and extra-high-voltage transmission system, the converter station is an important link, and the power capacitor is an important component of the converter station. The test result of the power capacitor noise test shows that: the radiation noise of a single power capacitor under the simulated working condition can reach more than 60dB (A), and the radiation noise of all power capacitors in the whole converter station which are superposed together can reach more than 90dB (A). Since environmental issues caused by noise are receiving more and more attention, how to effectively reduce the radiation noise level of the power capacitor has become an urgent engineering problem to be solved.
In view of this, utility model publication No. CN109103017A discloses a metal rubber damper for damping and reducing noise of a power capacitor and a method for installing the same. The metal rubber shock absorber comprises a capacitor shell; the top of the capacitor shell is provided with a vertically arranged capacitor sleeve; the capacitor shell is provided with an inner cavity, and the top and the bottom of the inner cavity of the capacitor shell are provided with vibration reduction elements; a capacitor core which is transversely arranged is arranged between the two vibration reduction elements at the top and the bottom of the inner cavity of the capacitor shell; the vibration damping element comprises a clamping plate, a metal rubber ring and two solid plates; the two solid plates are arranged in parallel, and a gap is formed between the two solid plates; the metal rubber ring is positioned between the two solid plates, and clamping plates are arranged on two sides of the metal rubber ring; the clamping plate is fixedly arranged on the solid plate; a metal rubber ring is arranged between the two ends of the two solid plates; the end parts of the clamping plates on the two sides of the metal rubber ring are provided with fixed baffle plates; the fixed baffle plate penetrates through a central hole of the metal rubber ring; both ends of the fixed stop are fixedly connected with the end parts of the clamping plates.
The noise of the power capacitor is mainly caused by the mechanical vibration of the capacitor housing caused by the plates of the capacitor, and the areas where the housing vibrates most strongly are the bottom and the two end faces of the outlet pipe sleeve. Although the above patent can play a certain role in vibration and noise reduction, due to the self annular structural characteristics of the metal rubber ring and the material characteristics of the metal rubber, the acting force generated under the action of the applied voltage easily causes the capacitor core to vibrate left and right while vibrating up and down, so that the effect is deteriorated, and the problem that the capacitor core is suspended and collided in oil is easily caused.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the damping effect of making an uproar that falls among the prior art poor, produces the defect that the condenser core was in suspension in the fluid and bumps in disorder easily to a power capacitor and device of making an uproar falls in the damping is provided.
The utility model provides a vibration damping and noise reduction device for a power capacitor, which is arranged between a capacitor core and a box body corresponding to the upper end surface and the lower end surface of the capacitor core, and comprises a core bracket for supporting the capacitor core, a bottom plate arranged on the box body and a plurality of vibration isolation devices arranged between the core bracket and the bottom plate; the vibration isolation device includes:
the sleeve is fixedly arranged on the bottom plate and is provided with a hollow pipe cavity;
the spring piece is made of elastic materials, covers the tube cavity, is fixedly arranged on the sleeve at the edge, and is provided with a matching structure in the middle area surrounded by the edge;
and the connecting shaft is matched with the matching structure in an installing way, and the top end of the connecting shaft is connected with the core bracket.
Optionally, the matching structure is a matching hole formed in the spring piece; at least two spring pieces are arranged between the connecting shaft and the sleeve in the length direction.
Optionally, the bottom plate is provided with a first hole cavity corresponding to the sleeve and communicated with the tube cavity; the two spring pieces comprise a first spring piece arranged between the sleeve and the bottom plate and a second spring piece arranged on the top of the sleeve; the tail end of the connecting shaft extends into the first hole cavity, and the connecting device further comprises a fixing ring which is used for pressing and fixing the second spring piece on the top of the sleeve.
Optionally, the connecting shaft penetrates through the matching hole and corresponds to the two spring pieces, and matching protrusions matched with the spring pieces in an abutting mode are arranged on the inner sides of the spring pieces.
Optionally, the fixing ring, the second spring piece, the sleeve, the first spring piece and the bottom plate are correspondingly provided with mounting holes, and connection is achieved through threaded pieces penetrating through the mounting holes.
Optionally, the bottom plate includes an upper bottom plate and a lower bottom plate, the upper bottom plate and the lower bottom plate are both provided with a first hole cavity corresponding to the sleeve and communicated with the tube cavity, and the upper bottom plate is further provided with a second hole cavity allowing a lead of the capacitor core to pass through.
Optionally, the sleeve is of a cylindrical structure, the tube cavity is a cylindrical cavity coaxial with the sleeve, the spring piece is of a circular sheet structure, the matching structure is arranged at the position of the circle center, and a through hole is further formed between the edge structure and the matching structure.
Optionally, the spring piece is made of beryllium bronze.
Optionally, the radial stiffness of the spring plate is 110000000N/m, and the axial stiffness of the spring plate is 140000N/m.
Optionally, the core bracket is a square box for supporting the end of the capacitor core, and the peripheral wall structure of the square box corresponding to the side surface of the capacitor core is provided with an oil hole for penetration of insulating oil.
Optionally, a sound insulation cavity is arranged between the bottom plate and the box body.
The utility model simultaneously provides a power capacitor, including above-mentioned arbitrary item the damping fall the device of making an uproar.
The utility model discloses technical scheme has following advantage:
the utility model provides a damping and noise reduction device for power capacitor, wherein the spring leaf has higher radial rigidity and lower axial rigidity, thereby ensuring that the damping and noise reduction device has good buffer action to the vibration of the capacitor core in the directions of two ends, has good inhibition action to the movement in the left and right directions, and avoids the problem that the original capacitor core is suspended and bumpy in oil; in addition, there is structural damping after the device of making an uproar falls in the damping, simultaneously because the electric capacity core soaks in fluid, fluid also will provide the damping force for the reciprocating vibration of electric capacity core, consequently the device of making an uproar falls in the damping that this application provided utilizes the viscous effect of structure itself and fluid to play better vibration isolation damping effect, finally realizes making an uproar the purpose of making an uproar.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of a power capacitor according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an upper bottom plate in a power capacitor according to a first embodiment of the present invention;
fig. 3 is a schematic structural view of a spring plate in a power capacitor according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a connecting shaft in a power capacitor according to a first embodiment of the present invention;
fig. 5 is a graph showing the vibration damping transmission rate according to the first embodiment of the present invention.
Description of reference numerals:
the capacitor comprises a box body 1, a capacitor core 2, a core bracket 3, a vibration isolation device 4, a lower bottom plate 5, a first hole cavity 6, a second hole cavity 7, a spring piece 8, a matching hole 9, a connecting shaft 10 and a matching bulge 11.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 to 4 show an embodiment of a vibration and noise reduction device for a power capacitor provided by the present invention.
The vibration and noise reduction device for the power capacitor is applied to the power capacitor. The power capacitor comprises a box body 1 and a capacitor core 2 arranged in the box body 1. Vibration and noise reduction devices are respectively arranged between the upper end surface and the lower end surface of the capacitor core 2 and the box body 1. The vibration and noise reduction device comprises a core bracket 3, a bottom plate and a vibration isolation device 4.
The core bracket 3 is provided with two corresponding upper and lower ends of the capacitor core 2, and is a square box body which is matched with the end part of the capacitor core 2 and has an open top and is used for supporting and fixing the end part of the capacitor core 2. The core bracket 3 is completely wrapped or partially wrapped corresponding to the side wall of the capacitor core 2, and if the capacitor core is completely wrapped, a plurality of oil holes are required to be formed in the peripheral wall of the square box body for the penetration of insulating oil.
A plurality of vibration isolators 4 are provided between the base plate and the core carrier 3. The bottom plate is divided into an upper bottom plate and a lower bottom plate 5 which are used for installing and fixing the vibration isolation device 4. In this embodiment, the upper base plate has 8 cavities, including 6 first cavities 6 for fixing the vibration isolation device 4 and 2 second cavities 7 for facilitating the lead wires of the capacitor core 2 to pass through; the lower base plate 5 has only 6 first bores 6 for fixing the vibration isolation devices 4.
The vibration isolation device 4 includes a connecting shaft 10, a sleeve, a spring piece 8, and a fixing ring. The sleeve is of a cylindrical structure and is provided with a pipe cavity coaxial with the cylindrical structure. One end of the sleeve is fixedly arranged on the bottom plate and is aligned with the first hole cavity to form a movable cavity together.
One end of the connecting shaft 10 is connected with the core bracket 3, and the other end extends into the movable cavity.
The spring piece 8 is of a circular sheet structure, a matching hole 9 matched with the connecting shaft 10 is formed in the circle center, and a through hole is formed between the matching hole 9 and the edge. The spring plate is made of beryllium copper and has low axial rigidity and extremely high radial rigidity along the radial direction, and the radial rigidity of the spring plate 8 in the embodiment is 110000000N/m and the axial rigidity is 140000N/m after being tested.
In this embodiment, there are two spring strips 8, including a first spring strip disposed at the bottom of the corresponding sleeve and a second spring strip at the top. The first spring piece is positioned between the sleeve and the bottom plate and is pressed and fixed through the sleeve and the bottom plate. The top of the sleeve is provided with a fixing ring, and the second spring piece is located between the sleeve and the bottom plate and is abutted and pressed to be fixed through the sleeve and the bottom plate. The fixing ring, the second spring piece, the sleeve, the first spring piece and the bottom plate are correspondingly provided with mounting holes, and the spring piece 8 is connected with the sleeve and the sleeve is connected with the bottom plate through the threaded piece penetrating through the mounting holes.
The connecting shaft 10 penetrates through the matching holes 9 of the spring pieces 8, matching protrusions 11 matched with the spring pieces 8 in an abutting mode are arranged on the inner sides of the two spring pieces 8, and the capacitor core 2 soaked in oil is supported through the matching installation of the matching protrusions 11 and the spring pieces 8. The spring piece has higher radial rigidity and lower axial rigidity, so that the vibration-damping noise-reducing device has good buffering effect on the vibration of the capacitor core in the directions of two ends, has good inhibiting effect on the movement in the left and right directions, and avoids the problem that the original capacitor core is suspended and collided in oil; in addition, there is structural damping after the device of making an uproar falls in the damping, simultaneously because electric capacity core 2 soaks in fluid, fluid also will provide the damping force for electric capacity core 2's reciprocating vibration, consequently the device of making an uproar falls in the damping that this application provided utilizes the viscous effect of structure itself and fluid to play better vibration isolation damping effect, finally realizes making an uproar the purpose of making an uproar.
In the present application, the material and number of the spring pieces can be determined according to the factors of the bearing weight, the noise reduction frequency and the like.
In this embodiment, the connecting shaft 10, the fixing ring, the sleeve and the core bracket 3 are made of materials consistent with the box body 1, and the bottom plate is made of materials consistent with the box body 1 or non-conductive materials such as glass fiber reinforced plastics.
The vibration reduction and noise reduction device provided by the embodiment is subjected to simulation test. When the mass of the capacitor cell supported by the spring is 50 Kg-60 Kg, 24 spring pieces 8 are adopted, and the vibration isolation transmissibility is shown in figure 5.
As can be seen from the figure, the vibration transmissivity at 100Hz is reduced by 39.31dB compared with the case without vibration isolation, so that the noise radiated to the outside by the vibration response of the capacitor case at 100Hz at the frequency around 100Hz will also be greatly attenuated. Considering that the cell has only one degree of freedom of reciprocating vibration between the top surface and the bottom surface due to the constraint of the designed vibration damping device, the noise peaks at vibration response components above 100Hz, such as 500Hz, 550Hz, 600Hz, 650Hz, 700Hz, 1100Hz, 1150Hz, 1200Hz, 1250Hz, 1300Hz, etc., will be greatly attenuated. In addition, 50Hz is generally the power frequency of the capacitor connected with alternating current, and the designed vibration isolation device 4 is the starting point of playing the vibration isolation role at the power frequency of 50Hz, so that the possibility of noise radiation to the outside due to vibration caused by excitation of the power frequency of 50Hz under the power-on condition is avoided.
In order to further improve the noise reduction effect, a closed sound insulation cavity can be arranged between the bottom plate and the box body.
The embodiment of the utility model provides a power capacitor is provided simultaneously, it includes the damping of above-mentioned embodiment and falls the device of making an uproar.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (12)
1. A vibration damping and noise reduction device for a power capacitor comprises a box body (1) and a capacitor core (2) arranged in the box body (1);
the method is characterized in that: the vibration and noise reduction device is arranged between the capacitor core (2) and the box body (1) corresponding to the upper end surface and the lower end surface of the capacitor core (2), and comprises a core bracket (3) for supporting the capacitor core (2), a bottom plate arranged on the box body (1) and a plurality of vibration isolation devices (4) arranged between the core bracket (3) and the bottom plate; the vibration isolation device (4) comprises:
the sleeve is fixedly arranged on the bottom plate and is provided with a hollow pipe cavity;
the spring piece (8) is made of elastic materials, covers the tube cavity, is fixedly arranged on the sleeve at the edge, and has a matching structure in the middle area surrounded by the edge;
and the connecting shaft (10) is matched with the matching structure in an installing way, and the top end of the connecting shaft is connected with the core bracket (3).
2. The vibration damping and noise reducing apparatus according to claim 1, wherein: the matching structure is a matching hole (9) formed in the spring piece (8); at least two spring pieces (8) are arranged between the connecting shaft (10) and the sleeve in the length direction.
3. The vibration damping and noise reducing apparatus according to claim 2, wherein: the bottom plate is provided with a first hole cavity (6) corresponding to the sleeve and communicated with the tube cavity; the two spring pieces (8) comprise a first spring piece arranged between the sleeve and the bottom plate and a second spring piece arranged on the top of the sleeve; the tail end of the connecting shaft (10) extends into the first hole cavity (6), and the connecting device further comprises a fixing ring which is used for pressing and fixing the second spring piece on the top of the sleeve.
4. A vibration and noise reduction apparatus according to claim 3, wherein: the connecting shaft (10) penetrates through the matching holes (9) and corresponds to the two spring pieces (8), and matching protrusions (11) matched with the spring pieces (8) in an abutting mode are arranged on the inner sides of the spring pieces (8).
5. A vibration and noise reduction apparatus according to claim 3, wherein: the fixing ring, the second spring piece, the sleeve, the first spring piece and the bottom plate are correspondingly provided with mounting holes, and connection is realized through threaded pieces penetrating through the mounting holes.
6. Vibration damping and noise reducing arrangement according to any of claims 1-5, characterized in that: the bottom plate comprises an upper bottom plate and a lower bottom plate (5), the upper bottom plate and the lower bottom plate (5) are both provided with a first hole cavity (6) corresponding to the sleeve and communicated with the tube cavity, and the upper bottom plate is also provided with a second hole cavity (7) allowing a lead of the capacitor core (2) to pass through.
7. The vibration damping and noise reducing apparatus according to claim 1, wherein: the sleeve is of a cylindrical structure, the tube cavity is a cylindrical cavity which is coaxial with the sleeve, the spring piece (8) is of a circular sheet structure, the matching structure is arranged at the position of the circle center, and a through hole is formed between the edge structure and the matching structure.
8. The vibration damping and noise reducing apparatus according to claim 7, wherein: the spring piece (8) is made of beryllium bronze.
9. The vibration damping and noise reducing apparatus according to claim 8, wherein: the radial rigidity of the spring plate is 110000000N/m, and the axial rigidity of the spring plate is 140000N/m.
10. The vibration damping and noise reducing apparatus according to claim 1, wherein: the capacitor core bracket (3) is a square box body for supporting the end part of the capacitor core (2), and the peripheral wall structure of the square box body corresponding to the side surface of the capacitor core (2) is provided with an oil hole for penetration of insulating oil.
11. The vibration damping and noise reducing apparatus according to claim 1, wherein: a sound insulation cavity is arranged between the bottom plate and the box body (1).
12. A power capacitor, characterized by: a vibration and noise reduction apparatus comprising a device as claimed in any of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921053543.4U CN210110534U (en) | 2019-07-05 | 2019-07-05 | Power capacitor and vibration and noise reduction device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921053543.4U CN210110534U (en) | 2019-07-05 | 2019-07-05 | Power capacitor and vibration and noise reduction device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN210110534U true CN210110534U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921053543.4U Active CN210110534U (en) | 2019-07-05 | 2019-07-05 | Power capacitor and vibration and noise reduction device thereof |
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| Country | Link |
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| CN (1) | CN210110534U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110415972A (en) * | 2019-07-05 | 2019-11-05 | 全球能源互联网研究院有限公司 | A kind of power capacitor and its vibration and noise reducing device |
-
2019
- 2019-07-05 CN CN201921053543.4U patent/CN210110534U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110415972A (en) * | 2019-07-05 | 2019-11-05 | 全球能源互联网研究院有限公司 | A kind of power capacitor and its vibration and noise reducing device |
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