Yuav ua li cas xam qhov siab Thaum Roj Hmab Foob Compressed
Nkag siab txog qhov compression siab ntawm cov roj hmab ntsaws ruaj ruaj yog qhov tseem ceeb rau kev tsim qauv foob, kev teeb tsa, thiab kev ntsuas kev ua haujlwm. Kev ntsuas qhov tseeb kom ntseeg tau tias kev sib khi ua haujlwm zoo, tiv thaiv qhov tsis ua haujlwm ntxov ntxov, thiab tswj kom muaj kev ncaj ncees thoob plaws hauv tsheb, kev lag luam, thiab kev siv hydraulic.
1. Cov qauv kev sib xyaw ua kom siab
Basic Pressure Calculation
P = F / A
Qhov twg:
P=Compression Siab (MPa lossis psi)
F=Applied Force (N lossis lbf)
A=Thaj Chaw Sib Txuas (mm² lossis in²)
Ntsiab Cai:Compression siab yog lub zog faib rau thaj tsam ntawm lub foob thiab cov mating nto. Lub siab no yuav tsum muaj txaus los tsim kom muaj kev sib khi zoo yam tsis ua rau ntau dhau deformation lossis cov khoom puas tsuaj.
2. Compression Stress Raws li cov khoom siv
Kev ntxhov siab -Txoj kev sib raug zoo
σ = E × ε
Qhov twg:
σ=Compression Stress (MPa)
E=Elastic Modulus (MPa)
ε=Lim (compression ratio)
Rau cov ntsaws ruaj ruaj, cov lim (ε) yog xam raws li:
ε = (H₀ - H₁) / H₀
Qhov twg:
H₀=Thawj thickness (mm)
H₁=Compressed thickness (mm)
| Khoom siv | Elastic Modulus (MPa) | Pom zoo Compression (%) | Hom Hardness (Shore A) |
|---|---|---|---|
| NBR (Nitrile) | 5-15 | 15-25% | 60-90 |
| EPDM | 6-12 | 15-30% | 50-80 |
| FKM (Viton) | 8-18 | 15-25% | 65-90 |
| Silicone (VMQ) | 3-10 | 20-30% | 40-80 |
| HNBR | 10-20 | 15-25% | 70-95 |
3. Ua piv txwv suav nrog
Piv txwv 1: O-Ring Compression Pressure
Muab Parameters:
- O- khoom siv nplhaib: NBR 70 Shore A
- Hla-section txoj kab uas hla (d): 3.5 mm
- Groove qhov tob: 2.8mm
- Compression: 3.5 - 2.8=0.7 hli (20%)
- O- nplhaib puab txoj kab uas hla: 20 mm
- Elastic Modulus (E): 10 MPa
Kauj ruam 1:Muab xam compression ratio
ε = 0.7 / 3.5 = 0.20 (20%)
Kauj ruam 2:Muab xam compression stress
σ=E × ε=10 MPa × 0.20=2.0 MPa
Kauj Ruam 3:Xam qhov chaw tiv tauj
Hu rau dav ≈ compressed cross-section × π × txhais txoj kab uas hla
Luas=π x π x ({1}}) mm ≈ 206 mm²
Kauj Ruam 4:Xam tag nrho compression quab yuam
F=σ × A=2.0 MPa × 206 mm²=412 N
Qhov tshwm sim:Lub nplhaib O- tsim kwv yees li2.0 MPa compression siabnrog tag nrho sealing quab yuam ntawm412 N.
Piv txwv 2: Flat Gasket Compression
Muab Parameters:
- Gasket khoom: EPDM
- Original thickness: 2.0 hli
- Compressed thickness: 1.5 hli
- Gasket sab nraud txoj kab uas hla: 100 mm
- Gasket puab txoj kab uas hla: 80 mm
- Elastic Modulus: 8 MPa
Kauj ruam 1:Muab xam compression ratio
ε = (2.0 - 1.5) / 2.0 = 0.25 (25%)
Kauj ruam 2:Muab xam compression stress
σ=8 MPa × 0.25=2.0 MPa
Kauj Ruam 3:Xam qhov chaw tiv tauj
A=π × (R₁² - R₂²)=π × (50² - 40²)=2,827 mm²
Kauj Ruam 4:Xam qhov xav tau bolt quab yuam
F=2.0 MPa × 2,827 mm²=5,654 N ≈ 5.65 kN
Qhov tshwm sim:Tag nrho bolt quab yuam ntawm kwv yees li5,65kn uayuav tsum tau compress lub gasket rau 1.5 hli thickness.
4. Cov yam ntxwv cuam tshuam rau compression siab
4.1 Khoom Hardness (Shore A)
- Cov roj hmab mos (40-60 Ntug A): Tsawg compression siab, zoo conformability
- Cov roj hmab nruab nrab (60-75 Ntug A): Balanced compression thiab rov qab muaj zog
- Cov roj hmab tawv (75-90 Ntug A): Siab compression siab, zoo extrusion kuj
4.2 Kev kub ntxhov
- Qhov kub siab txo qis elastic modulus (tso compression siab)
- Tsawg kub nce txhav (siab compression siab)
- Kub coefficient feem ntau: -0.5% -2% ib degree
4.3 Compression Set
Tseem ceeb:Compression set txo lub zog sealing lub sijhawm. Tom qab lub sijhawm ntev compression, lub siab zoo yuav txo qis los ntawm 20-40% nyob ntawm cov khoom thiab cov xwm txheej.
4.4 Installation kam rau ua
- Groove tob kam rau ua: ± 0.05 ~ 0.10mm
- Deg roughness: Ra 0.8 txog 3.2 μm pom zoo
- Lub lubrication kom zoo txo qhov kev siv zog ntawm 30-50%
5. Tsim cov lus qhia thiab cov lus pom zoo
| Daim ntawv thov | Compression Range | Pom zoo siab | Sau ntawv |
|---|---|---|---|
| Static O-rings | 15-25% | 1.5-3.0 MPa | Standard sealing daim ntaub ntawv |
| Dynamic O-rings | 8-15% | 0.8-2.0 MPa | Txo kev sib txhuam |
| Flat gaskets | 20-40% | 2.0-5.0MPa | Kev siv flange |
| High -cov ntsaws ruaj ruaj | 15-20% | 3.0-8.0 MPa | Nrog thaub qab rings |
| Lub tshuab nqus tsev vacuum | 20-30% | 1.0-2.5MPa | Tiv thaiv txoj kev xau |
Cov kev coj ua zoo tshaj plaws
- Tsawg kawg compression: 10% kom paub meej thawj kev sib cuag
- Qhov siab tshaj plaws compression: 30% tiv thaiv kom tsis txhob deformation
- Foob nyem: Sib npaug ntawm kev sib khi quab yuam thiab kev pabcuam lub neej
- Kev nyab xeeb yam: 1.5-2.0 rau cov ntawv thov tseem ceeb
- Kev sim: Ib txwm siv tau cov kev suav nrog kev kuaj lub cev
6. Cov txheej txheem suav Advanced
6.1 Finite Element Analysis (FEA)
Rau txoj kev sib foob geometry thiab chaw thau khoom, FEA muab kev txheeb xyuas kev ntxhov siab kom raug:
- Cov nyiaj rau cov uas tsis yog - cov khoom siv coj los ua
- Simulates kev sib cuag mechanics
- Predicts kev nyuaj siab concentration
- Optimizes foob tsim ua ntej prototyping
6.2 Mooney-Rivlin Qauv
Rau cov khoom siv roj hmab hyperelastic:
W = C₁(I₁ - 3) + C₂(I₂ - 3)
Qhov twg W yog strain zog ceev thiab I₁, I₂ yog strain invariants
6.3 Cov Ntsiab Lus Kho Kom Zoo
- Sijhawm- nyob ntawm kev so: σ(t) = σ₀ × e^(-t/τ)
- Kev cuam tshuam ntau zaus: Rau dynamic seals nyob rau hauv cyclic loading
- Cov kua dej ntau ntau: Sab hauv siab txhim khu kev sib khi
Xaus
Cov ntsiab lus tseem ceeb:
- Kev xam kom raugntawm compression siab ua kom pom kev ua haujlwm zoo
- Khoom siv(elastic modulus, hardness) cuam tshuam rau lub siab xav tau
- Tsim nyog compression ntau yam(15-25% rau feem ntau daim ntawv thov) sib npaug sealing efficiency thiab durability
- Environmental yam(kub, tshuaj) yuav tsum tau txiav txim siab hauv kev tsim
- Kev xeem validationNws yog ib qho tseem ceeb rau cov ntawv thov sealing tseem ceeb
Kev nkag siab txog kev ntsuas compression siab ua rau cov kws tshaj lij tsim cov tshuab sealing txhim khu kev qha, xaiv cov khoom tsim nyog, thiab tiv thaiv kev ua tsis tiav ntxov ntawm kev siv tsheb, kev lag luam, thiab hydraulic.
Hais txog US
Qhov Zoo Tshaj Plaws tshwj xeeb hauv siab -cov khoom siv roj hmab sealing nrog kev txhawb nqa engineering:
- Kev cai foob tsim thiab compression tsom xam
- 10,000+ O-Ring👉thiabgasket 👉pwm muaj
- Cov khoom siv: NBR, EPDM, FKM, HNBR, VMQ, FFKM, PU
- Kev sab laj rau kev pom zoo xaiv foob
- ISO 9001, RoHS, REACH, FDA ua raws
- Kev xa khoom sai nrog cov khoom lag luam loj hauv warehouse
Hu rau US
Xiamen Best Seal Imp thiab Exp Co., Ltd
Tel: +86-592-5782315
Mob: +8618950159396
Email: yunying2@bestsealhk.com
Ntxiv: Unit 522-525, Gaodian Road 6#, Huli District, Xiamen, Suav teb
