CN104318062B - A kind of analysis method of wheel hub and main shaft end face inorganic zinc rich paint paint film - Google Patents
A kind of analysis method of wheel hub and main shaft end face inorganic zinc rich paint paint film Download PDFInfo
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- CN104318062B CN104318062B CN201410505746.8A CN201410505746A CN104318062B CN 104318062 B CN104318062 B CN 104318062B CN 201410505746 A CN201410505746 A CN 201410505746A CN 104318062 B CN104318062 B CN 104318062B
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- paint
- film thickness
- zinc rich
- inorganic zinc
- paint film
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- 239000003973 paint Substances 0.000 title claims abstract description 82
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000011701 zinc Substances 0.000 title claims abstract description 46
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 46
- 238000004458 analytical method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000004364 calculation method Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 238000011545 laboratory measurement Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 16
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 abstract description 4
- 239000007888 film coating Substances 0.000 abstract description 3
- 238000009501 film coating Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The present invention relates to the analysis method of a kind of wheel hub and main shaft end face inorganic zinc rich paint paint film, for film thickness design calculate and paint film coating thickness actual control, prevent because film thickness design or control it is improper and caused by paint film rupture abnormal sound and frictional decrease and caused by major accident the problem of；The calculation procedure that film thickness controls is：Pass through simple formulaCalculate amax；In formula, S is the contact area in bolt face, and N is the normal pressure in bolt face, and f is the coefficient of friction in bolt face, and E is the modulus of elasticity of inorganic zinc rich paint, and γ is inorganic zinc rich paint coating surface energy density, β π, amaxFor " crack " characteristic length, i.e. film thickness.The present invention with simple formula can calculates inorganic zinc rich paint film thickness, effectively guards against and high caused by MW class wind turbines wheel hub and spindle end top-coat paint film rupture abnormal sound reprocesses expense.
Description
Technical field
The present invention relates to the analysis method of a kind of wheel hub and main shaft end face inorganic zinc rich paint paint film, belong to wind generating technology
Field, it can also be used to the calculating of the inorganic zinc rich paint bolt surface film thickness of bridge, drilling platforms etc..
Background technology
In MW class wind turbine, wheel hub for anti-corrosion, conduction and keeps enough coefficient of friction, mesh with main shaft end face
Preceding most designs borrow the inorganic zinc rich paint used in the Bridge Design of static load and wheel hub and main shaft end face are sprayed.However,
More frequently shock loading in being rotated because of MW class wind turbine wind wheel assembly be present, if spraying inorganic zinc rich paint paint film thickness
It is improper to spend, and can cause the decline of coefficient of friction, causes wheel hub to bolt end face with main shaft and is not enough to provide enough frictional force, and then
Cause paint film rupture and the frequent generation of abnormal sound, when paint film rupture is to a certain extent and when reaching crushing state, result in wheel hub
Couple failure and the fatigue cutting of connecting screw with main shaft end face, so as to cause the 2 meters of left sides on the outside of 80-100 rice high towers that overhang
The major accident fallen for the wind wheel assembly that even up to a hundred tons of right tens tons occurs.Study wheel hub and the spraying of main shaft end face is inorganic
Zinc rich paint film thickness, it is significant to the generation that prevents such accident.But do not have an effectively analysis paint at present
The method of film thickness, so can not effectively prevent because paint film is broken and caused by major accident.
The content of the invention
It is an object of the invention to provide the analysis method of a kind of wheel hub and main shaft end face inorganic zinc rich paint paint film, for paint film
Thickness design calculate and paint film coating thickness actual control, prevent because film thickness design or control it is improper and caused by paint
Film rupture abnormal sound and frictional decrease and caused by major accident the problem of.
To achieve the above object, the solution of the present invention includes：A kind of point of wheel hub and main shaft end face inorganic zinc rich paint paint film
Analysis method, comprises the following steps：
1) determine that bolt face contact area, bolt face normal pressure and bolt face are rubbed according to exemplar feature and experimental test data
Wipe coefficient value.
2) paint film thickness angle value is calculated according to formula.
The calculation procedure of paint film thickness angle value is：
Using calculation formula：Calculate amax；
Wherein, S is the contact area in bolt face, and N is the normal pressure in bolt face, and f is the coefficient of friction in bolt face, and E is nothing
The modulus of elasticity of machine zinc rich paint, γ are inorganic zinc rich paint coating surface energy density, β π, amaxIt is for " crack " characteristic length, i.e., full
Foot requires frictional force Ff=fN maximum film thickness.
It is further comprising the steps of before the step of calculating paint film thickness angle value：Known to middle substitution
S, N of exemplar calibration value, the fixed value of measured value and β then in conjunction with a, f, calculate inorganic zinc rich paint paint film characteristic ginseng
Number E γ value, calculation formula is updated to by characterisitic parameter E γ valueIn.
The present invention provides a kind of simple and effective analysis wheel hub and the method for main shaft end face inorganic zinc rich paint film thickness, leads to
The contact area in bolt face is crossed, bolts the normal pressure in face, bolts the number such as the coefficient of friction in face, the characterisitic parameter of inorganic zinc rich paint
According to calculating inorganic zinc rich paint film thickness with simple formula can, effectively guard against because of MW grade wind driven generator wheels
Hub reprocesses expense with high caused by spindle end top-coat paint film rupture abnormal sound.
Brief description of the drawings
Fig. 1 is the signal that the present invention is handled by original " crack " in solid the convexconcave part on spraying zinc rich paint contact surface
Figure；
Fig. 2 is the schematic diagram that the present invention is calculated three-dimensional stress by More's graphing method bolt contact surface cell body；
σ3The stress along film thickness direction decomposed for shear stress.
Embodiment
The present invention will be further described in detail below in conjunction with the accompanying drawings.
It is an object of the invention to：It is temporary for MW class wind turbines wheel hub and main shaft end face inorganic zinc rich paint film thickness
Current demand without design and calculation method and the actual coating thickness concession monitoring of inorganic zinc rich paint, proposes a kind of wheel hub and main shaft
The analysis method of end face inorganic zinc rich paint paint film, the design for film thickness calculates and the concession of paint film coating thickness calculates,
Prevent because film thickness design or control it is improper and caused by paint film rupture abnormal sound and bolt face frictional decrease and caused by
The problem of major accident.
For design-calculated foundation, mainly by ensureing certain bolt face coefficient of friction on the premise of, find one
The engineering calculating method of film thickness between kind bolt face, is comprised the following steps that：
The basic theories of the present invention assumes it is that bolt surface is assumed to be into continuous uniform, isotropic elastic solid (Hookean body), its
The convexconcave part equivalent-simplification on middle contact surface is original " crack " processing in solid, as shown in Figure 1.The feature in equivalent " crack "
Size is a, and shearing friction power causes equivalent " crack " both sides tension, " crack " propagation direction along maximum crushing stress direction (i.e. this
Film thickness direction in embodiment) extension, therefore, " crack " two layers of material has common characteristic, if its modulus of elasticity is
E, present embodiment are chosen by the modulus of elasticity of the main component zinc of the zinc rich paint containing zinc 85%.
Top-coat paint film tensile stress sigma is bolted in the present invention1It is according to biaxial stress in the mechanics of materials with shear stress τ relation
Circle More's graphing method obtains.Method is as follows：According to the relation directly proportional to normal pressure of the frictional force on contact surface, if coefficient of friction
For f, normal pressure N, determined to bolt normal pressure N size by the pretightning force and bolt number that bolt face bolt, then frictional force Ff
=fN；Because frictional force is acted on the contact area S of bolt face, then the shear stress that face is subject to is boltedBy material
Expect biaxial stress circle More's graphing method in mechanics, as shown in Figure 2, it is known that shear stress can divide in 45 ° of directions of bolt plane interior edge
Solve as pure tensionAnd compression
Coefficient of friction f calculation formula are to be pushed away according to " crack " extension in fracture mechanics with the energy balance suppressed in the present invention
What export came.Equivalent " crack " characteristic size a is by deformation energy caused by tensionIt is special with maintenance " crack "
The fracture surface energy Us=2 γ a that sign size a does not extendcInteract and obtain, the bar that " crack " characteristic size a does not extend
Part is Δ U=US- U >=0, above-mentioned formula is substituted into after arranging to obtain：Thus formula is understood, friction
Coefficient f is in the case where there is the N effects of bolt normal pressure, and contact area S, elastic modulus E, equivalent " crack " characteristic size a, list
" crack " surface energy density on bit width is γ (unit J/m2) relevant, wherein surface energy density γ, according to fracture mechanics
Definition, be by crack tension stress σ1The fracture bond energy absorbed in forming process is acted on (equivalent to the maintenance of surface tension
Can), in the hypothesis of the present invention, the self-assembling formation that " crack " surface energy is zinc rich paint spraying and film forming procedure is somebody's turn to do, due to bolt
The effect of junction normal pressure, " crack " surface size acIncrease, the crimp of similar balloon, surface tension maintains can Us=2
γ·ac(N) will also increase, due to ac>=a, ac=ac(N), above-mentioned formula can be changed toTake
The critical condition Δ U=U that paint film does not ruptureS- U=0, and now a, ac(N) can approximation take maximum amaxCondition, can obtain
The coefficient of friction in bolt faceFor sake of convenience, it is reduced to belowWherein, the β is selected to be
Constant, E γ are that inorganic zinc rich paint paint film characterisitic parameter can also be set to constant, and formula can be further simplified asWherein
In the present invention, " crack " propagation direction is along maximum crushing stress Directional Extension, i.e. film thickness direction；Equivalent " crack "
Characteristic size be according to inorganic zinc rich paint film forming feature from outward appearance to inner essence, and inorganic zinc rich paint the waving due to alcohol after dry film
The porous organization that the contraction of hair and polymer is formed, maximum hole depth touch matrix surface, therefore maximum hole depth and film thickness phase
When maximum hole depth is exactly that can stablize equivalent " crack " the characteristic size a of tensile stress sigmamax, so as to by calculating feature chi
Very little amaxObtain film thickness.
UtilizeBy the frictional force F for substituting into measurement in labf=fN, contact area S, paint film thickness
Degree a known measurements can calculate the characterisitic parameter K of inorganic zinc rich paint.
Selection and coating work because of " crack " surface energy density γ and inorganic zinc rich paint on elastic modulus E, unit width
Skill is relevant, belongs to a kind of characteristic value of inorganic zinc rich paint, the inorganic zinc rich paint elastic modulus E 1 on the contact surface in laboratory,
" crack " surface energy density γ 1 on unit width, should should also have with the inorganic zinc rich paint on the bolt surfaces brought into contact surface of design
" crack " surface energy density γ 2 on suitable elastic modulus E 2, unit width, therefore, it is ensured that the characteristic of inorganic zinc rich paint
Value E γ are approximate, and then, obtain constant parameter K.
Afterwards, can according to the coefficient of friction f of different designs requirement, bolt normal pressure N, tri- variables of contact area S and
Parameter K, by formulaBe converted toCarry out the calculating of film thickness.
Such as：Zinc rich paint thickness requirement is applied to wind turbine gearbox wheel hub and main shaft end face, certain famous foreign company is relevant specially
Family once required to require blasting treatment (Rz50 μm of roughness) that the thickness of spraying inorganic zinc rich paint was 50 ± 10% μm, but reason does not have
Provide, moreover, the operation difficulty or ease of thickness ± 5 μm realize that about after half a year, the renowned company provides thickness must be at 50-80 μm
Requirement, whether design requirement suitable, and by above-mentioned computational methods, checking computations are as follows：
Present invention foundation refers to Zhang Yutian, side mountain wide three《Apply the sliding and relaxation of inorganic zinc rich paint high-strength bolt connection》
Middle Fig. 1, table 4, table 7, actual bolt contact surface area can be calculated by Fig. 1, the paint film thickness in table 4 is by actual measurement
Draw, the bolt precompression and the data skid resistance frictional coefficient of tables of data 7 in table 4 are converted according to measurement data
82.9 μm of paint film thickness in measuring and calculating value, such as table 4, corresponding skid resistance frictional coefficient μ in pressure 33.54t, and table 7=
0.722, data above is all known test data record, in conjunction with bolt face contact area 1=(55 in above-mentioned document legend
+80+80+55)*95(mm2) and chart in normal pressure data N1=33.54t, use formulaTo inorganic richness
The characteristic value E γ of zinc paint are calculated, (note：Selection identical β=π) obtain E γ=5.5734e+009 (PaJ/
m2)。
By the MW blower fan main shafts data relevant with wheel hub of certain external certain renowned company design, input contact area S=
0.84(m2), contact normal pressure N=48*535 (kN), after the coefficient of friction requirement 0.3 minimum with wheel hub of MW blower fan main shafts, foundationCalculate a, as a result about 86 μm.
Therefore, what the film thickness of famous foreign manufacturer design requirement must be at 50-80 μm is suitable.Actual spraying paint film thickness
The control of degree should be within 86 μm.
Second class can be used for the guidance of film thickness in Analogy：
The 2MW blower fan main shafts and the film thickness of wheel hub studied according to certain above-mentioned famous foreign company must be at 50-80 μm
Requirement, take film thickness maximum amax=80 μm, input contact area S=0.84 (m2), contact normal pressure N=48*535
(kN), MW blower fan main shafts and the minimum coefficient of friction design requirement 0.3 of wheel hub, (note：Selection identical β=π) use formulaThe characteristic value E γ of inorganic zinc rich paint are calculated, obtain E γ=5.2851e+009 (PaJ/
m2)。
So, Analogy：The calculating of the film thickness of certain famous foreign company 3MW blower fan main shaft and wheel hub, so that it may defeated
Enter contact area S=1.36 (m2), contact normal pressure N=2*48*535 (kN), MW blower fan main shafts and the minimum coefficient of friction of wheel hub
It is required that after 0.3, foundationCalculate a, as a result about 52.48 μm.
Thus, it is apparent that being not suitable for control, pass through formulaIt is that 80, f is constant that we, which can increase a, and s is not
Become, N=2*48*535 (kN) can diminishes, that is, reduces screw rod quantity, while also reduce cost.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is above-mentioned basic scheme, for those of ordinary skill in the art, according to the teachings of the present invention, designs various changes
The model of shape, formula, parameter simultaneously need not spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment is carried out are still fallen within protection scope of the present invention.
Claims (2)
1. the analysis method of a kind of wheel hub and main shaft end face inorganic zinc rich paint paint film, it is characterised in that the analysis method includes
Following steps：
1) bolt face contact area, bolt face normal pressure and bolt face friction system are determined according to exemplar feature and experimental test data
Numerical value；
2) paint film thickness angle value is calculated according to formula；
The calculation procedure of the paint film thickness angle value is：
Using calculation formula：Calculate amax；
Wherein, S is the contact area in bolt face, and N is the normal pressure in bolt face, and f is the coefficient of friction in bolt face, and E is inorganic richness
The modulus of elasticity of zinc paint, γ are inorganic zinc rich paint coating surface energy density, β π, amaxIt is maximum for equivalent " crack " characteristic length
Value, that is, meet to require frictional force Ff=fN maximum film thickness.
2. the analysis method of wheel hub according to claim 1 and main shaft end face inorganic zinc rich paint paint film, it is characterised in that
Before the step of calculating paint film thickness angle value, analysis method is further comprising the steps of：Middle substitution is
Know S, N of exemplar calibration value, the fixed value of measured value and β then in conjunction with a, f, calculate inorganic zinc rich paint paint film characteristic
Parameter E γ value, a are the film thickness of laboratory measurement, and characterisitic parameter E γ value is updated into the calculation formulaIn.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893427A (en) * | 2010-07-19 | 2010-11-24 | 哈尔滨飞机工业集团有限责任公司 | Method for measuring thickness of paint layer of composite material part |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4870872B2 (en) * | 2001-02-23 | 2012-02-08 | 株式会社キリウ | Rotating brake member for vehicle brake device and rust prevention treatment method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893427A (en) * | 2010-07-19 | 2010-11-24 | 哈尔滨飞机工业集团有限责任公司 | Method for measuring thickness of paint layer of composite material part |
Non-Patent Citations (3)
| Title |
|---|
| 多层介质粗糙表面热弹塑性接触问题研究;佟瑞庭;《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅱ辑》;20070615;全文 * |
| 电泳涂装应用于铝合金汽车轮毂的研究;王再德;《第11届车用涂料与涂装技术研讨会暨2013汽车涂料专委会年会》;20131206;全文 * |
| 风电机组轮毂与主轴联接异响问题分析;黄爱武 等;《化工机械》;20140922;第41卷(第1期);第454-455页 * |
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