How Do You Calculate an Extension Spring's Load?

Mufunika kasupe amene amakoka ndi mphamvu inayake, koma mawerengedwe anu atsekedwa. Ziwalozo zimakhala zomasuka kwambiri kapena zothina kwambiri, ndipo mumayika pachiwopsezo chopanga chosadalirika kapena cholephera kwathunthu.

Chiwerengero chonse cha kasupe wowonjezera chimawerengedwa ndi formula iyi: Katundu = (Mtengo wa Spring × Mtunda Woyenda) + Kuvuta Kwambiri[1]n](https://www.acxesspring.com/initial-tension-in-extension-springs.html?srsltid=AfmBOoqIOZdbYGa2dxloEt1N1MVBsBVWbRRAne-8F6W4-_GoP9_Vgr3o)[^2]. Izi zimapanga mphamvu zonse kuchokera kutambasula ndi mphamvu yodzaza kale yomwe inamangidwa mu kasupe.

Mu wanga 14 zaka zothandizira mainjiniya kupanga akasupe achizolowezi, gwero lofala kwambiri la zolakwika ndikuyiwala gawo limodzi la njira yosavuta. Anthu ambiri amangoganizira za kasupe komanso kutalika kwake, kunyalanyaza kwathunthu kukanikiza koyamba. Mphamvu yobisika imeneyi nthawi zambiri imakhala kusiyana pakati pa makina omwe amamva kumvera ndi omwe amawoneka ngati osasamala komanso otsika mtengo.. Tiyeni tifotokoze momwe tingawerengere izi nthawi zonse.

What's the Fundamental Formula for Spring Load?

Munawerengera mphamvuyo pogwiritsa ntchito masika ndi mtunda wokha. Panopa, mawonekedwe anu akuthupi amafuna mphamvu zambiri kuti zigwire ntchito kuposa momwe mumayembekezera, kutaya mapangidwe anu onse.

Njira yolondola ndi Katundu = (Mtengo wa Spring × Ulendo) + Kuvuta Kwambiri. Muyenera kuwonjezera katundu woyambira (Kuvuta Kwambiri) ku mphamvu yopangidwa ndi kutambasula (Mtengo wa Spring × Ulendo) kupeza mphamvu yeniyeni yeniyeni.

Ndikukumbukira ndikugwira ntchito ndi oyambitsa omwe anali kupanga zida zatsopano zolimbitsa thupi. Mapangidwe awo adadalira kasupe wopereka zosalala, kuwonjezeka kukana. Ma prototypes awo oyamba anali owopsa. Panali "dead zone" kumayambiriro kwa kukoka kusanayambe kutsutsa kwenikweni. Iwo anali atayiwala kotheratu za kusamvana koyambirira m’kuŵerengera kwawo. Iwo ankangowerengera mtengo wa masika. Tinakonzanso kasupe ndi mtengo weniweni wovuta. Izi zidapangitsa kuti wosuta amve kukana nthawi yomweyo, ndipo kuchuluka kwathunthu pakukulitsa kwathunthu kumafanana ndi zomwe akufuna. Kusintha kumodzi kumeneko kunapangitsa kuti mankhwalawa amve ngati akatswiri komanso apamwamba kwambiri.

Zosintha Zitatu Zofunikira

Kuwerengera katundu, muyenera kumvetsetsa zinthu zitatu zosiyana. Aliyense amakhala ndi gawo lofunikira pakumaliza komaliza kwa masika.

• Mtengo wa Spring (k)[^ 3]: This is the spring's stiffness, kuyezedwa mwamphamvu pagawo lililonse la mtunda (e.g., lbs/inchi kapena N/mm). Zimakuuzani kuchuluka kwa mphamvu zowonjezera zomwe zimafunika pa inchi iliyonse kapena millimeter yomwe mumatambasula kasupe.
• Yenda (X)[^ 4]: Uwu ndiwo mtunda umene kasupe watambasulidwa kuchokera popuma, kapena "mfulu," kutalika.
• Kuvuta Kwambiri[^ 2] (IT): Izi ndizo mphamvu zomwe zimapangidwira mu kasupe panthawi yopanga. It's the load you must apply just to separate the coils before it even starts to stretch.

Chifukwa Chiyani? Kuvuta Kwambiri[^ 2] Cholakwika Chofala Kwambiri?

Your spring isn't engaging when you need it to. Pali kuchedwa kowonekera kusanayambe kukoka, zomwe zimabweretsa khalidwe losagwirizana m'moyo wanu msonkhano wamakina[^6].

Kuchedwa uku kumachitika chifukwa cha kupsinjika koyambira kocheperako kapena kolakwika. Mphamvu ya pre-load iyi ndiyo kusintha komwe kumanyalanyazidwa kwambiri, komabe imatsimikizira katundu wofunikira masika asanayambe kutambasula, directly impacting the system's responsiveness.

One of the clearest examples I've seen was for a simple screen door closer. A hardware company came to us because their new door closers weren't working. The doors wouldn't fully latch shut. Masimpe omwe adapanga anali ndi mphamvu zokwanira masika, koma zinalibe pafupifupi kusamvana koyamba. Izi zikutanthauza kuti kwa maulendo angapo otsiriza a maulendo, pamene kasupe adafupikira, katunduyo adatsika mpaka pafupifupi ziro. Panalibe "snap" yomaliza" kukokera chitseko mu latch. Tinapanga kasupe watsopano ndi mlingo womwewo koma tinawonjezera kuchuluka kwa zovuta zoyamba. Kusintha kwakung'ono kumeneko kunapereka chikoka chosalekeza chofunikira kutseka chitseko motetezeka nthawi zonse.

Kumene Kulimbana Koyamba Kumachokera

Kukangana koyamba sikungochitika mwangozi; ndi chinthu chomwe chidapangidwa mwadala panthawi yopanga.

• Njira Yopangira Coiling: Pamene waya wa masika akukulungidwa pa makina, chapindika pang'ono. Izi torsional stress[^7] ndi zomwe zimakanikizira makoyilo mwamphamvu motsutsana ndi mnzake.
• Kugwira nchito: Mphamvu yomangidwirayi ndiyothandiza pamapulogalamu ambiri. Zimapangitsa kuti misonkhano ikhale yolimba, amalepheretsa kugwedezeka kwa vibration, and ensures a makina amakhala otetezedwa[^8] in its resting position. Mphamvu yonse ya kasupe wanu nthawi zonse imakhala chiwerengero cha mphamvu yoyambayi kuphatikizapo mphamvu yochokera kutambasula.

Momwe Mungagwiritsire Ntchito Fomula Pavuto Limene Likuchitika Padziko Lapansi??

Njirayi ikuwoneka ngati yachidule. You're not confident about how to plug in your own numbers and get a reliable answer for your specific application, kuchititsa kuchedwa kwa polojekiti yanu.

Mutha kugwiritsa ntchito chilinganizo chosavuta, ndondomeko pang'onopang'ono. Choyamba, define your spring's properties (mlingo, kulimbana koyamba, utali waulere). Ndiye, dziwani kutalika kwa ntchito yanu kuti muwerengere maulendo. Pomaliza, lowetsani mfundo izi mu fomula.

Posachedwapa tidagwira ntchito ndi injiniya wamagalimoto yemwe anali kupanga lachi yodzaza ndi masika a chipinda chamagetsi.. Mafotokozedwe ake anali olondola kwambiri. Latch imafunika kuti ikhale yotetezeka komanso ikhale yosavuta kutsegula. Mainjiniya anatipatsa katundu yemwe amafunikira pamalo okhazikika. Tinagwiritsa ntchito njira yowerengera katundu m'mbuyo. Tinkadziwa katundu wofunika komanso mtunda woyenda, kotero titha kugwirira ntchito cham'mbuyo kuti tifotokozere kuphatikiza koyenera kwa kasupe ndi kupsinjika koyambirira. Izi "mapangidwe-ndi-mawerengero" njirayo idapulumutsa kuyesa ndi zolakwika zambiri ndi ma prototypes akuthupi ndikuwafikitsa komaliza, ntchito gawo mofulumira kwambiri.

Chitsanzo Chowerengera Pang'onopang'ono

Let's walk through a complete example.
Tangoganizani kuti muli ndi kasupe ndi mfundo zotsatirazi:

• Utali Waulere (L₀): 2 mainchesi
• Mtengo wa Spring (k)[^ 3]: 10 lbs/inchi
• Kuvuta Kwambiri (IT): 5 lbs ndi

Funso: Ndi katundu wotani pamene kasupe atambasulidwa mpaka kutalika kwake (L₁) za 6 mainchesi?

1. Yerekezerani kutalika kwa Maulendo (X):
   Travel = Extended Length - Free Length
X = 6 inches - 2 inches = 4 inches

2. Werengani Katundu Kuchokera Kutambasula:
   Load from Travel = Spring Rate × Travel
Load from Travel = 10 lbs/inch × 4 inches = 40 lbs

3. Werengetsani Katundu Wonse:
   Total Load = Load from Travel + [Initial Tension](https://www.acxesspring.com/initial-tension-in-extension-springs.html?srsltid=AfmBOoqIOZdbYGa2dxloEt1N1MVBsBVWbRRAne-8F6W4-_GoP9_Vgr3o)[^2]
Total Load = 40 lbs + 5 lbs = 45 lbs

Yankho lomaliza ndilo 45 lbs ndi.

Mapeto

To calculate an extension spring's load, muyenera kugwiritsa ntchito fomula yonse. Nthawi zonse yonjezerani zovuta zoyambira ku mphamvu yopangidwa ndi masika ndikuyenda kuti mupeze zotsatira zolondola.

[1]: Kumvetsetsa chilinganizochi ndikofunikira pakupanga kolondola kwa masika ndikuchita bwino.
[^ 2]: Phunzirani momwe kukangana koyambirira kumakhudzira magwiridwe antchito a kasupe komanso kuyankha pamakina.
[^ 3]: Dziwani momwe masika amakhudzira kuuma ndi kuchuluka kwa akasupe.
[^ 4]: Kumvetsetsa mtunda waulendo ndikofunikira kuti mutsimikizire kuti kasupe wanu akuyenda bwino.
[^ 5]: Onani kufunikira kwa mphamvu yodzaza kale kuti mukwaniritse zomwe mukufuna kuchita masika.
[^6]: Phunzirani momwe mawerengedwe oyenera a kasupe angathandizire kudalirika kwa misonkhano yamakina.
[^7]: Kumvetsetsa kupsinjika kwa torsional ndikofunikira pakuwonetsetsa kuti akasupe ali ndi thanzi komanso magwiridwe antchito.
[^8]: Phunzirani za kufunikira kwa ma spring posunga bata ndi magwiridwe antchito pazida.