Engineering & Specification Guide for Natural Ventilation and SHEV Systems
1. Cov ntsiab lus tseem ceeb
Kev xaiv thiab qhia txog cov saw hluav taws xob lub qhov rais actuators rau qhov tsis siv neeg lub qhov cua thiab cov pa taws thiab cua kub cua (SHEV) cov tshuab yuav tsum tau suav cov tshuab thiab kinematic. Kev loj hlob tsis raug ua rau muaj teeb meem loj: tsis txaus stroke tiv thaiv kev ua raws li qhov tsawg kawg nkaus aerodynamic free cheeb tsam yuav tsum tau, thaum muaj mob stroke ntau dhau los yog tsis tsim nyog kev kwv yees ua rau cov txheej txheem deformation ntawm lub qhov rais thav duab, chain fatigue tsis ua hauj lwm, los yog lub cev muaj zog burnout.
Phau ntawv qhia kev qhia no qhia txog cov qauv geometric, cov qauv kev ua haujlwm ntawm lub zog, kev xav tau quab yuam, thiab cov yam ntxwv ntawm kev nyab xeeb uas yuav tsum tau ua kom suav cov actuator stroke kom zoo thiab xav tau lub zog thawb / rub.
2. Kinematic Fundamentals: Stroke Calculation
Chain qhov rais actuators hloov tawm lub cev muaj zog thrust rau hauv angular hloov chaw nyob ib puag ncig ib puag ncig ruaj khov (pob khawm / kev sib txhuam nyob). Trigonometrically, laij lej actuator stroke yog daim duab peb sab sab ntev xam qhov twg lub qhov rais qhov siab thiab qhib lub kaum sab xis yog thawj qhov sib txawv.
2.1 Basic Kinematic Model (Sab saum toj / Hauv qab-Hung Windows)
Rau sab saum toj - dai lossis hauv qab - dai qhov rais qhov twg tus qauv actuator bracket yog mounted rau ntawm ntug (tus ncej ntug deb tshaj ntawm pob khawm):
EQUATION 1:S=2 × H × sin(θ / 2)
Qhov twg:
• S=Yuav tsum tau actuator stroke (mm)
• H=Siv tau qhov rais sash qhov siab perpendicular rau pob khawm axis (mm)
• θ=Lub hom phiaj qhib lub kaum sab xis (degrees)
LINEAR APPROXIMATION CEEB TOOM:Rau cov kaum sab xis me me (θ Tsawg dua lossis sib npaug li 30 degree), cov qauv yooj yim S ≈ H × sin (θ) yields qhov yuam kev hauv qab 3%. Txawm li cas los xij, rau daim ntawv thov SHEV (θ Ntau dua lossis sib npaug li 60 degree), tag nrho cov kab zauv trigonometric yuav tsum tau siv kom tsis txhob nyob rau hauv -sizing stroke ntev.
2.2 Offset Mounting Position Hloov
Thaum muaj kev txwv kev tsim vaj tsev (xws li cov qhov muag tsis pom sab hauv, cov qauv mullions, lossis qhov tob tob tob) tiv thaiv kev teeb tsa ntawm ntug kev, tus actuator yuav tsum tau rov qab los ze zog rau txoj kab pob khawm.
Cia L1 yog qhov tseeb mounting deb ntawm lub pob khawm pivot axis mus rau lub actuator saw txuas taw tes (L1 < H):
EQUATION 2:S_actual=2 × L1 × sin(θ / 2)
● Engineering Trade-tawm:Tsiv lub actuator bracket 50% los ze zog rau lub pob khawm txo qhov yuav tsum tau stroke ntev los ntawm 50%, tab sis ob npaug rau kev ua hauj lwm quab yuam yuav tsum tau ntawm ob lub saw thiab lub qhov rais ncej.
3. Force & Load Calculation Mechanics
Cov actuators yuav tsum kov yeej qhov hnyav hnyav, kev sib txhuam ntawm cov qauv, huab cua - seal compression resistance, thiab sab nrauv cua loads.
3.1 Lub ntiajteb txawj nqus Load Component (Fg)
Lub zog gravitational yuav tsum tau thawb lossis rub lub sash sib txawv nrog lub qhov rais hom thiab qhib lub kaum sab xis:
● Vertical Windows:Sab saum toj-Hung / Hauv qab-Hung Windows: Fg=(W × 9.81 / 2) × (H / L1) × sin(θ)
● Sloped Windows:Skylights / Roof Vents: Fg=(W × 9.81) × cos( ) × (H / L1)
3.2 Cua Load Component (Fwind)
Hauv siab - cov ntawv thov nce siab lossis thaj chaw ntug dej hiav txwv, cua siab ua rau perpendicular mus rau lub qhov rais dav hlau:
EQUATION 3:Fwind=Pwind × Asash × (H / [2 × L1])
Qhov twg Pwind=Tsim cua siab (N/m² lossis Pa) thiab Asash=Tag nrho thaj tsam ntawm qhov rais sash (m²).
3.3 Gasket Foob Compression (Fseal)
Txhawm rau kom IP- ntsuas huab cua nruj thaum kaw, siab - EPDM gaskets yuav tsum tau pib compression quab yuam:
● Standard Weather Strips:25 mus rau 40 N ib kab meter ntawm perimeter.
● Acoustic / Hnyav -Lub Luag Haujlwm Seals:Txog li 80 N ib kab 'meter' ntawm perimeter.
3.4 Tag Nrho Yam Tsawg Kawg Nkaus Actuator Force (Ftotal)
Siv cov qauv kev nyab xeeb kev nyab xeeb (Ks Ntau dua lossis sib npaug ntawm 1.30 txog 1.50):
TAG NRHO FORCE:Ftotal=Ks × max(Fg + Fseal, Fwind + Fg)
4. Engineering Reference Data Matrix
Cov hauv qab no matrix muab cov qauv geometric stroke yuav tsum nyob thoob plaws architectural qhov rais qhov siab profiles:
|
Qhov rai qhov siab H (mm) |
Lub hom phiaj θ |
Theoretical Stroke S (hli) |
Standard Spec Stroke (mm) |
Dawb Qhib Dist. D (mm) |
|
600 |
30 degree |
310.6 |
350 (Limited electronically) |
300.0 |
|
600 |
60 degree |
600.0 |
600 |
519.6 |
|
1000 |
30 degree |
517.6 |
550 (Limited electronically) |
500.0 |
|
1000 |
60 degree |
1000.0 |
1000 |
866.0 |
|
1400 |
30 degree |
724.7 |
750 (Limited electronically) |
700.0 |
|
1400 |
45 degree |
1071.5 |
1100 (Twin{1}}chain / Tandem) |
1071.5 |
5. Cov Txheej Txheem Txhim Kho & Cov Lus Qhia Tshwj Xeeb tseem ceeb
1. Electronic Limit Programming vs. Hard Stops:Tsis txhob cia lub qhov rais sash structural thav duab los ua raws li cov neeg kho tshuab nyuaj nres ntawm tag nrho cov hlab ntsha. Nco ntsoov qhia cov actuators nrog cov encoder sab hauv -raws li kev txwv kev hloov kho lossis micro- hloov limiters teeb tsa 10 mus rau 15 mm luv ntawm thav duab khi los tiv thaiv iav striping thiab thav duab deformation.
2. Buckling Resistance & Chain Sagging:Ib leeg - chain actuators ntsib lateral deflection thiab sagging thaum stroke ntev tshaj 500 mm. Rau cov ntawv thov mob stroke siab tshaj 600 mm lossis hnyav ob npaug - glazed units, qhia ob npaug -link hardened stainless steel chains los yog Tandem/Dual-Actuator configurations synchronized ntawm internal microprocessor tswj loops.
3. EN 12101-2 Ua raws li SHEV Systems:Cov pa hluav taws xob tso pa tawm yuav tsum tau lees paub kev ua haujlwm nyob rau hauv qhov hluav taws kub (300℃kev ua haujlwm ntev txog 30 feeb) thiab lub zog poob. Xyuas kom tus actuator specifications muaj xws li 24V DC thaum muaj xwm ceev fais fab tuag roj teeb thaub qab compatibility thiab chav kawm B300 tshav kub endurance ntawv pov thawj.