CN107946030A - A kind of vibration isolation distribution transformer - Google Patents
A kind of vibration isolation distribution transformer Download PDFInfo
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- CN107946030A CN107946030A CN201711147150.5A CN201711147150A CN107946030A CN 107946030 A CN107946030 A CN 107946030A CN 201711147150 A CN201711147150 A CN 201711147150A CN 107946030 A CN107946030 A CN 107946030A
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- Prior art keywords
- transformer
- vibration
- mass block
- isolation mounting
- isolation
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- 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
- F16F15/22—Compensation of inertia forces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention belongs to distribution transformer equipment, more particularly to a kind of vibration isolation distribution transformer.Existing, vibration insulation structure is set on the transformer, rigidity, the damping ratio of mass ratio, isolation mounting to transformer and shock-damping structure optimize, the structure is set to obtain optimal vibration insulation and noise reduction effect, it is respectively 1*10 in transformer total quality during being tested for the typical transformer of 10kV ranks3kg、1.5*103Kg and 2*103It is respectively 65dB, 58dB and 58dB to the vibration isolating effect under 100Hz frequencies in the case of kg, is respectively 73dB, 62dB, 62dB to the vibration isolating effect under 200Hz frequencies, frequency vibration insulation and noise reduction positive effect is transmitted in the vibration main to transformer.
Description
Technical field
The invention belongs to distribution transformer equipment, more particularly to a kind of vibration isolation distribution transformer.
Background technology
As the infrastructure device of power grid distribution, transformer is daily or industrial by being converted to for power grid high-voltage electricity stabilization safety
Electricity consumption, is auxiliary facility necessary to daily life electricity consumption, industrial production electricity consumption, and transformer is usually placed in power distribution room or power transformation
Stand, position, the iron core constantly acted in transformer due to the alternating voltage of power grid, the silicon steel sheet such as power grid joint simultaneously produce mangneto
Flexible, transformer can produce strong vibration and noise in itself, in the open air away from residential block or in strong background noise
It is lower upper will not it is obvious that but near residential neighborhood, such as each power distribution room, power distribution cabinet, can continue to produce middle low frequency strongly
Noise, low frequency noise will cause community resident the adverse effect of physiology and psychology in one side, on the one hand make power distribution room, match somebody with somebody
The working environment of electric cabinet is more severe.Since noise can be caused by taking sound barrier, sound absorption by solid, air borne
Material and layout of making rational planning for can alleviate the noise pollution that transformer is brought to a certain extent, but make an uproar at some to environment
Sound is required under harshness or in the environment that transformer configuration is concentrated, near fire high pressure/high-power transformer, and above-mentioned noise reduction noise abatement is arranged
Shi Shang cannot completely abate the noise pollution.
The content of the invention
The purpose of the invention is, designs a kind of vibration isolation distribution transformer and provides its design method, passes through the party
Method can obtain the transformer that can realize good vibration insulation and noise reduction.
To achieve the above object, the invention adopts the following technical scheme that.
A kind of vibration isolation distribution transformer, including transformer body further include the upper strata vibration isolation dress below transformer body
Put, upper strata isolation mounting lower end is connected with mass block, is connected with lower floor's isolation mounting below mass block, lower floor's isolation mounting is fixed
In basis；
Damping ratio ξ >=0.05 of the upper strata isolation mounting and lower floor's isolation mounting；The transformer body quality m1, matter
The weight of gauge block is m2, andWherein μ is mass ratio, and μ ∈ [5,10]；Lower floor's isolation mounting and upper strata isolation mounting
The ratio between rigidityk1Rigidity, k between transformer and mass block isolation mounting2
For the rigidity between mass block and lower floor's isolation mounting.
Mass block fixed plate is further included, the mass block is evenly arranged in mass block fixed plate, in mass block fixed plate
Lower end is respectively connected to upper strata isolation mounting and lower floor's isolation mounting.
The mass block is made of laminated metal plate and the rubber filling layer being clipped between metallic plate.
A kind of design method of the vibration insulation structure of transformer, comprises the following steps, step 1, specifies the basic ginseng of transformer
Number includes the weight, installation dimension and main vibration frequency of transformer；Step 2, according to the installation dimension of transformer base
And it uses the height limitation in space, provides the size range of mass block, and the working environment for considering transformer is true
Determine mass block selection material, and then determine its quality size, obtain determine by vibration isolation transformer body (including transformer and its
Auxiliary equipment) value range with the mass ratio of mass block；Step 3, according to the quality of transformer and mass block, that is, passes through lotus
Carry scope and choose the upper and lower isolation mounting for meeting load-up condition, and its rigidity and resistance are determined by the corresponding description of product
Buddhist nun's ratio, and then determine the ratio of rigidity on lower floor and upper strata；Step 4 is right based on the transmissibility curve of double-layer vibration isolating system
Vibration isolating effect carries out tentative prediction, by vibration isolating effect compared with pre-set threshold value, if satisfied, then carrying out next step；If no
Meet that then return to step two re-starts the selection of parameter；Step 5, according to selected optimal case in step 4, into luggage
The assembling put, transformer is installed on double-layer vibration isolating device and carries out field measurement, the quality for adjusting mass block is come into one
Step improves vibration isolating effect.
Further, the main vibration frequency value in the step 1 is 100Hz or 200Hz.Due to China
Supply frequency is 50Hz, thus the vibration frequency (i.e. transformer principal vibration noise source) of iron core be using 100Hz as fundamental frequency, and
Predominantly 100Hz and 200Hz, the higher hamonic wave of other more high orders can be ignored to simplify data handling procedure.
Further, the scope of the mass ratio of the transformer body in the step 2 and mass block is 5~10.
Its advantage is：
Existing, vibration insulation structure is set on the transformer, the mass ratio, isolation mounting to transformer and vibration-proof structure
Rigidity, damping ratio optimize, and the structure is obtained optimal vibration insulation and noise reduction effect, in the common change for 10kV ranks
It is respectively 1*10 in transformer total quality during depressor is tested3kg、1.5*103Kg and 2*103It is right in the case of kg
Vibration isolating effect under 100Hz frequencies is respectively 65dB, 58dB and 58dB, is respectively to the vibration isolating effect under 200Hz frequencies
Frequency vibration insulation and noise reduction positive effect is transmitted in 73dB, 62dB, 62dB, the vibration main to transformer.
Brief description of the drawings
Fig. 1 is the structure principle chart of the vibration isolation transformer of the present invention；
Fig. 2 is the schematic diagram of the vibrating isolation system of the present invention；
Fig. 3 is influence figure of the mass ratio to transmissibility in vibrating isolation system in the present invention；
Fig. 4 is influence figure of the ratio of rigidity to transmissibility in vibrating isolation system in the present invention；
Fig. 5 is influence figure of the damping ratio to transmissibility in vibrating isolation system in the present invention.
Its reference numeral includes：
Transformer 1, upper strata isolation mounting 2, mass block 3, mass block fixed plate 4, lower floor's isolation mounting 5, rubber filling layer
6。
Embodiment
Elaborate below in conjunction with specific embodiment to the invention.
Due in actual use, using dry-type transformer, the noise source master of dry-type transformer under most of occasions
If the vibration of itself, therefore the main method of the isolation scheme for transformer 1 of the present invention is to reduce transformer itself to shake
It is dynamic, vibration source strength is reduced, so as to reduce the vibration by transformer and building structure transmission, achievees the purpose that vibration insulation and noise reduction.
As shown in Figure 1, since almost symmetry arrangement is presented in the column structure of transformer 1 itself, in setting for the present invention
The cube structure that transformer is equivalent to a homogeneous in meter thinking is analyzed.Designed at the same time for ease of simplifying, improve effect
Fruit, the mass block 3 in the present invention is also uniformly to be arranged on below transformer, therefore the vibrational system of vibration isolation transformer of the present invention can
To be reduced to the areal model of a double freedom, as shown in Figure 2, by being obtained in Fig. 2, the vibration of the true system of song of the invention
Equation is represented by：
m1、m2The respectively quality of transformer and mass block 3, c1、c2Respectively transformer and mass block 3 and quality
Damped coefficient between block 3 and isolation mounting, k1、k2Respectively between transformer and mass block 3 and mass block 3 is filled with vibration isolation
The rigidity put；x1、x2Refer to the vertical to absolute displacement of transformer and mass block 3 respectively；F (t) is acted on the transformer
Around power, specifically refer to that the structures such as transformer interior loop are stretched the disturbance of generation, its stretching frequency and mains frequency ω phases
Should, it is represented by F (t)=F0Sin (ω t+ θ), introduces frequency response functionWherein FT(t) refer to pass
The power on ground is delivered to, andH1(ω)、H2(ω)、HT(ω) refer respectively to perturbed force F (t) and
x1、x2、FT(t) frequency response function between, H can be obtained by Laplace transformation1(ω) and H2The expression formula of (ω)
I.e.
Wherein | Q |=m1m2ω4-(m1k1+m2k1+m1k2+c1c2)ω2+k1k2-iω3(m1c1+m1c2+m2c1)+iω(k1c2+c1k2)
Introduce the mass ratio of transformer and mass block 3The rigidity of lower floor's isolation mounting 5 and upper strata isolation mounting 2
ThanThe frequency ratio of perturbed force frequency and top subsystem intrinsic frequencyWhereinUpper strata with
The damped coefficient of lower floor's isolation mounting 5
It is to new frequency response function expression formula by what 2. formula was converted：
Wherein
Therefore the transmissibility of the double-layer vibration isolating system of Fig. 2Analyze above formula, it is known that in ξi<<1 and λ
>>When 1, i.e., under the conditions of small damping and high frequency components, transmissibility is decayed with the biquadratic of forcing frequency.Control vibration isolation at the same time
The major influence factors of noise reduction, i.e. transmissibility are α, μ, ξi(i=1,2).
Another wherein two factors remain unchanged respectively, another factor is changed, obtains double-layer vibration isolating system in Fig. 2
Transmissibility curve as shown in Fig. 3, Fig. 4, Fig. 5, from figure, when keeping α and ξiWhen (i=1,2) is constant, for same
λ values, transmissibility reduces with the reduction of μ；Meanwhile with the reduction of μ, the position of two formants is to reach
Dynamic, i.e., corresponding value diminishes, and the distance between two formants also can become near therewith.As holding μ and ξi(i=1,2) no
During change, for same λ values, transmissibility is reduced with the reduction of α；But if as holding k2When constant, reducing α can make
k1Become larger, and then make ω1Become larger, cause the corresponding λ values of same ω to diminish, transmissibility can be likely to increase on the contrary.So subtracting
During small α values, it should select suitably to reduce lower stiffness layer k2Or the upper stiffness layer k of increase1.When keeping μ and α constant, transport curve
At high band (λ ＞ 5), with ξiThe increase of (i=1,2), the decay of transport curve slow down, but resonance peak is but with ξi
(i=1,2) increase and obtained effective reduction；And ξiThe change of (i=1,2) only influences the size of resonance peak, not
Influence the position of formant.
Simultaneously as China's power grid fundamental frequency is 50Hz, the main frequency of all kinds of transformers concentrates on 100Hz and 200Hz, should
Frequency is the frequency of vibration and noise source, therefore, in order to ensure that optimal vibration isolating effect, isolation mounting should be guaranteed that to 100Hz and
The vibration isolating effect of 200Hz.
From the foregoing, it can be understood that influence of the mass block 3 to vibrating isolation system as the important component of isolation mounting mainly passes through it
Quality and its mass ratio with transformer embody, while are also limited be subject to installation space i.e. its own volume, big absolutely
In most cases, its total height of the isolation mounting of for transformer is no more than 30cm, to prevent excessive isolation mounting from influencing
The installation of transformer is fixed, therefore should carry out production quality block 3 by the larger metal material of selection density as far as possible, at the same select every
When vibrating device (all types of elastic vibration isolation devices such as including vibration isolator), the highest load based on isolation mounting, to guarantee
Enough reach the validity that vibration isolating effect ensures isolation mounting at the same time, the gross mass of mass block 3 take transformer gross mass 10%~
20%.
Meanwhile the intrinsic frequency of the double-layer vibration isolating system in Fig. 2
To improve the vibration insulation and noise reduction effect of vibrating isolation system, the value of μ and α on the one hand can be made as far as possible small, it is another also to make face to face admittedly
There is frequencies omega0Value it is as far as possible small, to α derivations, and make (ω0) '=0Arrive, even if this system frequency takes
It is worth minimum Optimum Rigidity Ratio, but in practical applications, its load of same type of isolation mounting is with rigidity not necessarily in stringent
Linear relationship, there are certain fluctuation, therefore in optimal rigidity α0Basis on, in the range of its value range ± 20 into
Row selection meets actual operation requirements, i.e.,The damping ratio meeting of isolation mounting at the same time
When vibration deformation occurs, the deflection of isolation mounting impacts, and the damping ratio of isolation mounting is too small, then isolation mounting deforms
Amount is bigger, and transformer is bigger to displacement vertically when vibrating, although vibration isolation function can be realized preferably, easily transformer is existed
Destruction is produced in movement, it is necessary to assure enough damping specific strengths could ensure that transformer can be stablized and safe work, because
The damping ratio value of this isolation mounting should meet ξ >=0.05 to be required while ensureing its intensity and vibration isolating effect.
As shown in Figure 1, its concrete structure of the vibration isolation distribution transformer of the present invention includes transformer, below transformer
Upper strata isolation mounting 2, the lower section of upper strata isolation mounting 2 are connected with mass block fixed plate 4, have been evenly arranged in mass block fixed plate 4
Mass block 3, the lower section of mass block 3 are equipped with lower floor's isolation mounting 5, and above alleged mass block 3 should include specific embodiment process
In mass block 3 and the structure such as its fixed plate, mass block 3 is that steel make in the present embodiment, is since steel damp in itself
Several very littles, are unfavorable for the isolation of dither, the mass block 3 is by laminated metal plate and the construction being clipped between metallic plate
Rubber filling layer forms.Meanwhile the coefficient for the isolation mounting mentioned in this specification is to regard every layer of isolation mounting as entirety
Carry out
Finally it should be noted that above example is only illustrating the technical solution of the invention, rather than to this hair
It is bright create protection domain limitation, although being explained with reference to preferred embodiment to the invention, this area it is general
Lead to it will be appreciated by the skilled person that can be to the technical solution technical scheme is modified or replaced equivalently of the invention, without departing from this
The spirit and scope of innovation and creation technical solution.
Claims (6)
1. a kind of vibration isolation distribution transformer, including transformer body, it is characterised in that further include below transformer body
Upper strata isolation mounting, upper strata isolation mounting lower end are connected with mass block, are connected with lower floor's isolation mounting below mass block, lower floor every
Vibrating device is fixed on basis；
Damping ratio ξ >=0.05 of lower floor's isolation mounting and lower floor's isolation mounting；The transformer body quality m1, mass block
Weight be m2, andWherein μ is mass ratio, and μ ∈ [5,10]；Lower floor's isolation mounting is firm with upper strata isolation mounting
The ratio between degreek1The rigidity of isolation mounting, k between transformer and mass block2For matter
The rigidity of gauge block and lower floor's isolation mounting.
A kind of 2. vibration isolation distribution transformer according to claim 1, it is characterised in that mass block fixed plate is further included, it is described
Mass block is evenly arranged in mass block fixed plate, and mass block fixed plate upper and lower side is respectively connected to upper strata isolation mounting and lower floor
Isolation mounting.
A kind of 3. vibration isolation distribution transformer according to claim 1, it is characterised in that the mass block by laminated metal plate with
And it is clipped in the rubber filling layer composition between metallic plate.
A kind of 4. design method of the vibration insulation structure of transformer, it is characterised in that comprise the following steps,
Step 1, specifying the basic parameter of transformer includes weight, installation dimension and the main vibration frequency of transformer；
Step 2, according to the installation dimension of transformer and its use the height limitation in space, provide the size range of mass block,
And the working environment for considering transformer determines the material that mass block is selected, and then determines its quality size, is determined
By the value range of the transformer body (including transformer and its auxiliary equipment) of vibration isolation and the mass ratio of mass block；
Step 3, according to the quality of transformer and mass block, i.e., chooses the upper strata for meeting load-up condition with by load scope
Layer isolation mounting, and its rigidity and damping ratio are determined by the corresponding description of product, and then determine the ratio of rigidity on lower floor and upper strata；
Step 4, based on the transmissibility curve of double-layer vibration isolating system, carries out tentative prediction to vibration isolating effect, vibration isolation is imitated
Fruit is compared with pre-set threshold value, if satisfied, then carrying out next step；Return to step two re-starts parameter if being unsatisfactory for
Choose；
Step 5, according to selected optimal case in step 4, carries out the assembling of device, transformer is installed on double-layer vibration isolating
On device and field measurement is carried out, adjusts the quality of mass block further to improve vibration isolating effect.
5. a kind of design method of the vibration insulation structure of transformer according to claim 4, it is characterised in that in the step 1
Main vibration frequency value be 100Hz or 200Hz.
6. a kind of design method of the vibration insulation structure of transformer according to claim 4, it is characterised in that in the step 2
Transformer body and mass block mass ratio scope be 5~10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711147150.5A CN107946030A (en) | 2017-11-17 | 2017-11-17 | A kind of vibration isolation distribution transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711147150.5A CN107946030A (en) | 2017-11-17 | 2017-11-17 | A kind of vibration isolation distribution transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657192A (en) * | 2019-09-24 | 2020-01-07 | 涂建维 | Vibration isolation device based on tuned mass damper |
| CN111341526A (en) * | 2020-03-17 | 2020-06-26 | 广东电网有限责任公司电力科学研究院 | Vibration isolation system of oil-immersed transformer |
| CN112228488A (en) * | 2020-10-12 | 2021-01-15 | 中国自然资源航空物探遥感中心 | Two-stage vibration damper for domestic strapdown inertial navigation type aerogravimeter |
| CN114576740A (en) * | 2022-04-12 | 2022-06-03 | 青岛海信日立空调系统有限公司 | Outdoor machine of air conditioner |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112228488B (en) * | 2020-10-12 | 2021-09-14 | 中国自然资源航空物探遥感中心 | Two-stage vibration damper for domestic strapdown inertial navigation type aerogravimeter |
| CN114576740A (en) * | 2022-04-12 | 2022-06-03 | 青岛海信日立空调系统有限公司 | Outdoor machine of air conditioner |
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