CN104088946A - Vibration damper and transformer vibration damping method - Google Patents
Vibration damper and transformer vibration damping method Download PDFInfo
- Publication number
- CN104088946A CN104088946A CN201410301416.7A CN201410301416A CN104088946A CN 104088946 A CN104088946 A CN 104088946A CN 201410301416 A CN201410301416 A CN 201410301416A CN 104088946 A CN104088946 A CN 104088946A
- Authority
- CN
- China
- Prior art keywords
- vibration
- cover
- base
- vibration damping
- damping pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a vibration damper. The vibration damper comprises a first vibration damping layer, a second vibration damping layer and a vibration support. The first vibration damping layer comprises a first base with a cavity, a second base with a cavity and a concave vibration cover, wherein a first vibration damping rubber pad and a second vibration damping rubber pad are arranged in the cavity of the first base and the cavity of the second base respectively, and the first vibration damping rubber pad and the second vibration damping rubber pad are higher than the cavities; the first base and the second base are connected into a whole through the concave vibration cover. The second vibration damping layer is arranged on the concave portion of the concave vibration cover, wherein the second vibration damping layer comprises a first support with a cavity, a second support with a cavity, a first vibration cover and a second vibration cover; a third vibration damping rubber pad higher than the cavity of the first support is arranged in the cavity of the first support, and a fourth vibration damping rubber pad higher than the cavity of the second support is arranged in the cavity of the second support. The vibration support comprises a vibration base with a vibration damping cavity and a supporting cover, wherein the vibration base is fixedly connected with the supporting cover; the first vibration cover and the second vibration cover are fixedly connected with the vibration base respectively. The vibration damper is simple in structure, is of the double-layer composite vibration damping structure, and can cut off rigidity transfer between a transformer and a building and reduce noise substantially.
Description
Technical field
The invention belongs to appliance field.Be specifically related to a kind of vibration damping equipment and transformer vibration damping method.
Background technique
In recent years, at house and public place, used more and more high-power transformer, this has just proposed certain requirement to the noise of high-power transformer and Transformer.The noise problem of transformer receives people's concern more and more.The noise of hearing that transformer sends is caused by magnetostriction distortion unshakable in one's determination and the electromagnetic force in winding, fuel tank and magnetic shielding.Specifically, transformer noise has three sound sources, and the one, unshakable in one's determination, the 2nd, winding, the 3rd, cooler, the noise sum that zero load, load and cooling system cause.The reason that produces noise unshakable in one's determination is to form silicon steel plate unshakable in one's determination under the effect of alternating magnetic field, and it is magnetostriction that small variation can occur, and magnetostriction makes iron core do periodic vibration with the variation of excitation frequency.The vibrative reason of winding is that electric current produces electromagnetic force in winding, and leakage magnetic field also can make structural member produce vibration.For solving the noise problem of transformer, conventionally the technological scheme adopting is: transformer is arranged in the frame with soundproof effect, but can only weaken, rely on airborne a part of low frequency noise, and the part low-frequency noise that transformer relies on the building structure such as base plate to propagate still can not get solving.
Summary of the invention
A kind of simple in structure, the vibration damping equipment that acts on transformer and the oscillation damping method that can significantly slacken low-frequency noise that the present invention is directed to above-mentioned deficiency and provide.
For realizing above-mentioned technical purpose, use following technological scheme:
A kind of vibration damping equipment, comprise vibration damping layer one, vibration damping layer two and vibration support, vibration damping layer one lid that comprises the base one of belt chamber, the base two of belt chamber and spill are shaken wherein, in the chamber of described base one and base two, be respectively arranged with rubber damping pad one and rubber damping pad two higher than this chamber, spill is shaken to cover and is covered rubber damping pad one and rubber damping pad two, and base one and base two are connected as one, spill shake lid recess be provided with vibration damping layer two; Vibration damping layer two comprises the bearing one of belt chamber, the bearing two of belt chamber, shake and cover one and shake and cover two, in the chamber of bearing one and bearing two, be respectively arranged with rubber damping pad three and rubber damping pad four higher than this chamber, shake and cover one and shake and cover two and cover respectively rubber damping pad three and rubber damping pad four; Vibration is supported and to be comprised vibrating base and the supporting cover with vibration damping chamber, between vibrating base and supporting cover, is fixedly connected with, and shakes to cover one and cover two and be fixedly connected with vibrating base respectively with shaking.
Described rubber damping pad one, rubber damping pad two, rubber damping pad three and rubber damping pad four are used respectively two layers of cascaded structure, so that effectiveness in vibration suppression further improves.
Described rubber damping pad one, rubber damping pad two, rubber damping pad three and rubber damping pad four are used respectively three layers of cascaded structure, so that effectiveness in vibration suppression further improves.
A transformer vibration damping method, comprising: use two groups to be arranged at respectively below, transformer both sides above-mentioned arbitrary vibration damping equipment, adopt without fastening suspension Placement, the rigid of transmission between transformer and building is improved.
For making the present invention more be suitable for practicality, make further improvements below:
An oscillation damping method for transformer, also comprises:
At transformer vault's furred ceiling, do aluminum alloy sound absorption and insulation furred ceiling, to reduce standing wave effect and the air-borne sound of room reverberation, penetrate floor to last layer indoor propagation.
At high and low pressure cable, in underground laying, cause electric closet part, carry out vibration isolation processing.
The high voltage cable introducing portion of transformer, adopts high elasticity vibration isolator and support special (purpose) rubber vibration damper and support isolation, makes high voltage cable and prop up to put up to flexibly connect, and reduces the transmission of its vibration.
Transformer low voltage line row output lifts by suspension insulator, and DJ type damping steel spring vibration damping suspension bracket is installed between every suspension insulator and smallpox, and the transmission of low voltage line row vibration is lowered.
Transformer output terminal adopts and is flexible coupling.
Beneficial effect of the present invention is: vibration damping equipment of the present invention, simple in structure, easy for installation, be installed in use transformer below, adopt double-layer combined vibration damping structure, can disconnect the rigid of transmission between transformer and building, thereby significantly reduce noise.Oscillation damping method of the present invention, eliminates vibration and vibration insulation and noise reduction effect remarkable, and step is reasonable, simple to operate, reaches the environmental protection object of the most effectively eliminating low-frequency vibration structure borne noise.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is A-A section the first structural representation of Fig. 1.
Fig. 3 is A-A section the second structural representation of Fig. 1.
Fig. 4 is the third structural representation of A-A section of Fig. 1.
Fig. 5 is the B part enlarged view of Fig. 2.
Reference character: 1-base one, 2-base two, the 3-spill lid that shakes, 4-rubber damping pad two, 5-rubber damping pad one, 6-bearing one, 7-bearing two, 8-shakes and covers one, 9-and shake and cover two, 10-vibration isolation rubber three, 11-vibration isolation rubber four, 12-vibrating base, 13-supporting cover.
Embodiment
As shown in Figure 1, Figure 2 with shown in Fig. 5, a kind of vibration damping equipment, comprise vibration damping layer one, vibration damping layer two and vibration support, wherein vibration damping layer one comprises that the base 1 of belt chamber covers 3, the base 22 of belt chamber and spill are shaken, in the chamber of described base 1 and base 22, be respectively arranged with rubber damping pad 1 and rubber damping pad 24 higher than this chamber, spill is shaken and is covered 3 and cover rubber damping pad 1 and rubber damping pad 24, and base 1 and base 22 are connected as one, in spill, shake and cover 3 recess and be provided with vibration damping layer two; Vibration damping layer two comprises the bearing 1 of belt chamber, the bearing 27 of belt chamber, shake and cover one 8 and shake and cover 29, in the chamber of bearing 1 and bearing 27, be respectively arranged with rubber damping pad 3 10 and rubber damping pad 4 11 higher than this chamber, shake and cover one 8 and shake and cover 29 and cover respectively rubber damping pad 3 10 and rubber damping pad 4 11; Vibration is supported and to be comprised vibrating base 12 and the supporting cover 13 with vibration damping chamber, between vibrating base 12 and supporting cover 13, is fixedly connected with, and shakes to cover 1 and cover 29 and be fixedly connected with vibrating base 12 respectively with shaking.
As shown in Figure 3, rubber damping pad 1, rubber damping pad 24, rubber damping pad 3 10 and rubber damping pad 4 11 are used respectively two layers of cascaded structure, so that effectiveness in vibration suppression further improves.
As shown in Figure 4, rubber damping pad 1, rubber damping pad 24, rubber damping pad 3 10 and rubber damping pad 4 11 are used respectively three layers of cascaded structure, so that effectiveness in vibration suppression further improves.
A transformer vibration damping method, comprising:
Above-mentioned two groups of vibration damping equipments are arranged at respectively to below, transformer both sides, adopt without fastening suspension Placement, the rigid of transmission between transformer and building is improved.
The high voltage cable introducing portion of transformer, adopts high elasticity vibration isolator and support special (purpose) rubber vibration damper and support isolation, makes high voltage cable and prop up to put up to flexibly connect, and reduces the transmission of its vibration.
Transformer low voltage line row output lifts by suspension insulator, and DJ type damping steel spring vibration damping suspension bracket is installed between every suspension insulator and smallpox, and the transmission of low voltage line row vibration is lowered.
Four copper bars of transformer are replaced by with isoparametric establishment vibration isolation copper bus-bar.
The immovable point of all circuits (biography is shaken a little) is done to vibration damping to be processed.
At transformer vault's furred ceiling, do aluminum alloy sound absorption and insulation furred ceiling, to reduce standing wave effect and the air-borne sound of room reverberation, penetrate floor to last layer indoor propagation.
At high and low pressure cable, in underground laying, cause electric closet part, carry out vibration isolation processing.
Vibration damping equipment, simple in structure, easy for installation, be installed in use transformer below, adopt double-layer combined vibration damping structure, can disconnect the rigid of transmission between transformer and building, thereby significantly reduce noise.Use the oscillation damping method of vibration damping equipment, eliminate vibration and vibration insulation and noise reduction effect remarkable, step is reasonable, simple to operate, reaches the environmental protection object of the most effectively eliminating low-frequency vibration structure borne noise.
Claims (10)
1. a vibration damping equipment, comprise vibration damping layer one, vibration damping layer two and vibration support, vibration damping layer one lid (3) that comprises the base one (1) of belt chamber, the base two (2) of belt chamber and spill are shaken wherein, in the chamber of described base one (1) and base two (2), be respectively arranged with rubber damping pad one (5) and rubber damping pad two (4) higher than this chamber, the spill lid (3) that shakes covers rubber damping pad one (5) and rubber damping pad two (4), and base one (1) and base two (2) are connected as one, at the shake recess of lid (3) of spill, be provided with vibration damping layer two; Vibration damping layer two comprises the bearing one (6) of belt chamber, the bearing two (7) of belt chamber, shake and cover one (8) and shake and cover two (9), in the chamber of bearing one (6) and bearing two (7), be respectively arranged with rubber damping pad three (10) and rubber damping pad four (11) higher than this chamber, shake and cover one (8) and shake and cover two (9) and cover respectively rubber damping pad three (10) and rubber damping pad four (11); Vibration is supported and is comprised vibrating base (12) and the supporting cover (13) with vibration damping chamber, between vibrating base (12) and supporting cover (13), be fixedly connected with, shake and cover one (8) and cover two (9) and be fixedly connected with vibrating base (12) respectively with shaking.
2. vibration damping equipment as claimed in claim 1, is characterized in that: described rubber damping pad one (5), rubber damping pad two (4), rubber damping pad three (10) and rubber damping pad four (11) are used respectively two layers of cascaded structure.
3. vibration damping equipment as claimed in claim 1, is characterized in that: described rubber damping pad one (5), rubber damping pad two (4), rubber damping pad three (10) and rubber damping pad four (11) are used respectively three layers of cascaded structure.
4. a transformer vibration damping method, vibration damping equipment comprises vibration damping layer one, vibration damping layer two and vibration are supported, wherein vibration damping layer one comprises the base one (1) of belt chamber, the base two (2) of belt chamber and the spill lid (3) that shakes, in the chamber of described base one (1) and base two (2), be respectively arranged with rubber damping pad one (5) and rubber damping pad two (4) higher than this chamber, the spill lid (3) that shakes covers rubber damping pad one (5) and rubber damping pad two (4), and base one (1) and base two (2) are connected as one, at the shake recess of lid (3) of spill, be provided with vibration damping layer two, vibration damping layer two comprises the bearing one (6) of belt chamber, the bearing two (7) of belt chamber, shake and cover one (8) and shake and cover two (9), in the chamber of bearing one (6) and bearing two (7), be respectively arranged with rubber damping pad three (10) and rubber damping pad four (11) higher than this chamber, shake and cover one (8) and shake and cover two (9) and cover respectively rubber damping pad three (10) and rubber damping pad four (11), vibration is supported and is comprised vibrating base (12) and the supporting cover (13) with vibration damping chamber, between vibrating base (12) and supporting cover (13), be fixedly connected with, shake and cover one (8) and cover two (9) and be fixedly connected with vibrating base (12) respectively with shaking, two groups of vibration damping equipments described above are adopted without fastening suspension Placement and are arranged at respectively below, transformer both sides.
5. a transformer vibration damping method, vibration damping equipment comprises vibration damping layer one, vibration damping layer two and vibration are supported, wherein vibration damping layer one comprises the base one (1) of belt chamber, the base two (2) of belt chamber and the spill lid (3) that shakes, in the chamber of described base one (1) and base two (2), be respectively arranged with rubber damping pad one (5) and rubber damping pad two (4) higher than this chamber, the spill lid (3) that shakes covers rubber damping pad one (5) and rubber damping pad two (4), and base one (1) and base two (2) are connected as one, at the shake recess of lid (3) of spill, be provided with vibration damping layer two, vibration damping layer two comprises the bearing one (6) of belt chamber, the bearing two (7) of belt chamber, shake and cover one (8) and shake and cover two (9), in the chamber of bearing one (6) and bearing two (7), be respectively arranged with rubber damping pad three (10) and rubber damping pad four (11) higher than this chamber, shake and cover one (8) and shake and cover two (9) and cover respectively rubber damping pad three (10) and rubber damping pad four (11), vibration is supported and is comprised vibrating base (12) and the supporting cover (13) with vibration damping chamber, between vibrating base (12) and supporting cover (13), be fixedly connected with, shake and cover one (8) and cover two (9) and be fixedly connected with vibrating base (12) respectively with shaking, described rubber damping pad one (5), rubber damping pad two (4), rubber damping pad three (10) and rubber damping pad four (11) are used respectively two layers of cascaded structure, two groups of vibration damping equipments described above are adopted without fastening suspension Placement and are arranged at respectively below, transformer both sides.
6. a transformer vibration damping method, vibration damping equipment comprises vibration damping layer one, vibration damping layer two and vibration are supported, wherein vibration damping layer one comprises the base one (1) of belt chamber, the base two (2) of belt chamber and the spill lid (3) that shakes, in the chamber of described base one (1) and base two (2), be respectively arranged with rubber damping pad one (5) and rubber damping pad two (4) higher than this chamber, the spill lid (3) that shakes covers rubber damping pad one (5) and rubber damping pad two (4), and base one (1) and base two (2) are connected as one, at the shake recess of lid (3) of spill, be provided with vibration damping layer two, vibration damping layer two comprises the bearing one (6) of belt chamber, the bearing two (7) of belt chamber, shake and cover one (8) and shake and cover two (9), in the chamber of bearing one (6) and bearing two (7), be respectively arranged with rubber damping pad three (10) and rubber damping pad four (11) higher than this chamber, shake and cover one (8) and shake and cover two (9) and cover respectively rubber damping pad three (10) and rubber damping pad four (11), vibration is supported and is comprised vibrating base (12) and the supporting cover (13) with vibration damping chamber, between vibrating base (12) and supporting cover (13), be fixedly connected with, shake and cover one (8) and cover two (9) and be fixedly connected with vibrating base (12) respectively with shaking, described rubber damping pad one (5), rubber damping pad two (4), rubber damping pad three (10) and rubber damping pad four (11) are used respectively three layers of cascaded structure, two groups of vibration damping equipments described above are adopted without fastening suspension Placement and are arranged at respectively below, transformer both sides.
7. transformer vibration damping method as described in as arbitrary in claim 4-6, is characterized in that: also comprise that the high voltage cable introducing portion of transformer adopts high elasticity vibration isolator and support special (purpose) rubber vibration damper and support to isolate.
8. transformer vibration damping method as described in as arbitrary in claim 4-6, is characterized in that: also comprise, transformer low voltage line row output lifts by suspension insulator, and DJ type damping steel spring vibration damping suspension bracket is installed between every suspension insulator and smallpox.
9. transformer vibration damping method as described in as arbitrary in claim 4-6, is characterized in that: also comprise, transformer output terminal is used and is flexible coupling.
10. transformer vibration damping method as described in as arbitrary in claim 4-6, is characterized in that: also comprise, at transformer vault's furred ceiling, do aluminum alloy sound absorption and insulation furred ceiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410301416.7A CN104088946B (en) | 2014-06-27 | 2014-06-27 | A kind of vibration absorber and transformer vibration damping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410301416.7A CN104088946B (en) | 2014-06-27 | 2014-06-27 | A kind of vibration absorber and transformer vibration damping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104088946A true CN104088946A (en) | 2014-10-08 |
| CN104088946B CN104088946B (en) | 2017-06-06 |
Family
ID=51636689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410301416.7A Active CN104088946B (en) | 2014-06-27 | 2014-06-27 | A kind of vibration absorber and transformer vibration damping method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104088946B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332280A (en) * | 2014-11-10 | 2015-02-04 | 镇江船舶电器有限责任公司 | Anti-vibration connecting device of transformer for ship |
| CN105041940A (en) * | 2015-08-04 | 2015-11-11 | 广东小天才科技有限公司 | Rocker damping and buffering mechanism |
| CN108022734A (en) * | 2017-12-14 | 2018-05-11 | 国网河南省电力公司洛阳供电公司 | A kind of mobile noise reduction device for being used for main transformer in substation |
| CN108988365A (en) * | 2018-07-25 | 2018-12-11 | 国家电投集团黄河上游水电开发有限责任公司 | External staggered connection method for three-phase balance winding of high-capacity split-phase transformer |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05270774A (en) * | 1992-03-26 | 1993-10-19 | Mitsubishi Electric Corp | Car room elevator |
| CN101280819A (en) * | 2008-05-22 | 2008-10-08 | 深圳市林格曼环保机电技术开发有限公司 | Combined type vibration damping noise reducer of elevator |
| CN202326897U (en) * | 2011-11-18 | 2012-07-11 | 广州汇隽电力工程设计有限公司 | Vibration-isolating noise-reducing base of transformer |
| CN102602781A (en) * | 2011-10-31 | 2012-07-25 | 厦门嘉达环保建造工程有限公司 | Vibration isolation structure of traction machine |
| KR101255026B1 (en) * | 2012-12-06 | 2013-04-17 | 주식회사 케이피 일렉트릭 | Device for vibration reduce on transformer |
| CN203348425U (en) * | 2013-06-26 | 2013-12-18 | 湖南崇友电梯科技有限公司 | Combined type vibration absorption and noise reduction device |
| CN203382986U (en) * | 2013-06-06 | 2014-01-08 | 天津金硕地毯有限公司 | Embedded shock-absorbing noise-reducing base |
| CN203570915U (en) * | 2013-09-29 | 2014-04-30 | 马登华 | Vibration and noise reduction structure of elevator traction machine |
| CN203588824U (en) * | 2013-12-18 | 2014-05-07 | 广州市电力工程设计院有限公司 | Suspension dry type transformer system based on damping mechanism |
| CN204004131U (en) * | 2014-06-27 | 2014-12-10 | 重庆朗福环保科技有限公司 | A kind of vibration damping equipment |
-
2014
- 2014-06-27 CN CN201410301416.7A patent/CN104088946B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05270774A (en) * | 1992-03-26 | 1993-10-19 | Mitsubishi Electric Corp | Car room elevator |
| CN101280819A (en) * | 2008-05-22 | 2008-10-08 | 深圳市林格曼环保机电技术开发有限公司 | Combined type vibration damping noise reducer of elevator |
| CN102602781A (en) * | 2011-10-31 | 2012-07-25 | 厦门嘉达环保建造工程有限公司 | Vibration isolation structure of traction machine |
| CN202326897U (en) * | 2011-11-18 | 2012-07-11 | 广州汇隽电力工程设计有限公司 | Vibration-isolating noise-reducing base of transformer |
| KR101255026B1 (en) * | 2012-12-06 | 2013-04-17 | 주식회사 케이피 일렉트릭 | Device for vibration reduce on transformer |
| CN203382986U (en) * | 2013-06-06 | 2014-01-08 | 天津金硕地毯有限公司 | Embedded shock-absorbing noise-reducing base |
| CN203348425U (en) * | 2013-06-26 | 2013-12-18 | 湖南崇友电梯科技有限公司 | Combined type vibration absorption and noise reduction device |
| CN203570915U (en) * | 2013-09-29 | 2014-04-30 | 马登华 | Vibration and noise reduction structure of elevator traction machine |
| CN203588824U (en) * | 2013-12-18 | 2014-05-07 | 广州市电力工程设计院有限公司 | Suspension dry type transformer system based on damping mechanism |
| CN204004131U (en) * | 2014-06-27 | 2014-12-10 | 重庆朗福环保科技有限公司 | A kind of vibration damping equipment |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332280A (en) * | 2014-11-10 | 2015-02-04 | 镇江船舶电器有限责任公司 | Anti-vibration connecting device of transformer for ship |
| CN105041940A (en) * | 2015-08-04 | 2015-11-11 | 广东小天才科技有限公司 | Rocker damping and buffering mechanism |
| CN108022734A (en) * | 2017-12-14 | 2018-05-11 | 国网河南省电力公司洛阳供电公司 | A kind of mobile noise reduction device for being used for main transformer in substation |
| CN108022734B (en) * | 2017-12-14 | 2023-04-25 | 国网河南省电力公司洛阳供电公司 | Movable noise reduction device for main transformer in transformer substation |
| CN108988365A (en) * | 2018-07-25 | 2018-12-11 | 国家电投集团黄河上游水电开发有限责任公司 | External staggered connection method for three-phase balance winding of high-capacity split-phase transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104088946B (en) | 2017-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103047336B (en) | Method for controlling structural acoustic transmission on basis of combined type vibration isolation device | |
| CN203023381U (en) | Structure-borne sound transmission control system based on composite vibration isolation device | |
| CN104088946A (en) | Vibration damper and transformer vibration damping method | |
| CN202301687U (en) | Low-frequency vibration isolation platform | |
| KR101546353B1 (en) | A vibration absorber for transformer | |
| CN206412173U (en) | A kind of transformer with shock-absorbing function | |
| CN204512284U (en) | Two-way ring type tuned mass damper damping device | |
| CN203588824U (en) | Suspension dry type transformer system based on damping mechanism | |
| CN203491071U (en) | Device for controlling noise and vibration of transformer | |
| CN204242794U (en) | Potential device | |
| CN204004131U (en) | A kind of vibration damping equipment | |
| CN104599815A (en) | Noise-reducing installation structure for dry-type transformer | |
| KR101088610B1 (en) | Transformer core and coil assembly of soundproof construction | |
| CN201270148Y (en) | Sound insulation module on sound insulation apparatus of large noise equipment | |
| CN102709025A (en) | Low-noise transformer shell | |
| CN203462597U (en) | 1000 kilovolt high-voltage transformation substation anti-noise sound isolation wall | |
| CN202473491U (en) | Low-noise transformer shell | |
| CN108336654A (en) | Ring main unit sound-absorbing set | |
| CN206584797U (en) | A kind of vibration attenuation transformer | |
| CN205828068U (en) | A kind of transformer shell of band shock-damping structure | |
| CN205582699U (en) | Device of making an uproar falls in transformer damping | |
| CN205646087U (en) | Multi -system combiner unit POI machine case | |
| KR20150053868A (en) | Power equipment base isolation system | |
| CN203982951U (en) | A kind of low noise distribution transformer apparatus | |
| CN210628208U (en) | Elevator contactor noise insulation and elevator control equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |