How Do You Calculate an Extension Spring's Load?
Udinga umthombo otsala ngamandla athile, kodwa izibalo zakho zicimile. Amalungu aziva ekhululekile kakhulu okanye eqinile kakhulu, kwaye usengozini yoyilo olungathembekanga okanye olungaphumeleli ngokupheleleyo.
Umthwalo opheleleyo wokwandiswa kwentwasahlobo ubalwa kunye nale fomyula: Umthwalo = (Ireyithi yaseNtwasahlobo × Umgama wokuHamba) + Uxinzelelo lokuqala[^ 1]n](https://www.acxesspring.com/initial-tension-in-extension-springs.html?srsltid=AfmBOoqIOZdbYGa2dxloEt1N1MVBsBVWbRRAne-8F6W4-_GoP9_Vgr3o)[^2]. Oku kubala zombini amandla ukusuka ekunwebeni kunye namandla alayishiwe kwangaphambili awakhiwe entwasahlobo.
Kwi-yam 14 iminyaka yokunceda iinjineli ukuyila imithombo yesiko, owona mthombo uxhaphakileyo wempazamo kukulibala inxalenye yaloo fomula ilula. Abantu abaninzi bagxila kuphela kwireyithi yasentwasahlobo kunye nokuba ide kangakanani, ukungahoyi ngokupheleleyo uxinzelelo lokuqala. La mandla afihliweyo adla ngokuba ngumahluko phakathi kwesixhobo esiziva siphendula kunye nesiziva sinobudenge kwaye sinexabiso eliphantsi.. Makhe sihlalutye indlela yokufumana olu balo rhoqo.
What's the Fundamental Formula for Spring Load?
Ubale amandla usebenzisa nje isantya sasentwasahlobo kunye nomgama. Ngoku, iprototype yakho yomzimba ifuna amandla amaninzi ukuba asebenze kunokuba ubulindele, ukulahla yonke uyilo lwakho.
Ifomula echanekileyo yile Umthwalo = (Ireyithi yaseNtwasahlobo × Ukuhamba) + Uxinzelelo lokuqala. Kufuneka udibanise ukuqala kokulayisha kwangaphambili (Uxinzelelo lokuqala) kumandla aveliswa kukolula (Ireyithi yaseNtwasahlobo × Ukuhamba) ukufumana amandla apheleleyo okwenyaniso.
Ndikhumbula ndisebenza kunye nesiqalo esasiphuhlisa isixhobo esitsha sesixhobo sokuzilolonga. Uyilo lwabo lwaluxhomekeke kwintwasahlobo ebonelela ngokugudileyo, ukwanda kokuchasa. Iiprototypes zabo zokuqala zaziva zimbi kakhulu. Kwakukho "indawo efileyo" ekuqaleni kokutsalwa phambi kokuba kukhatywe naluphi na uxhathiso lokwenyani. Babelibele ngokupheleleyo ngoxinzelelo lokuqala ekubaleni kwabo. Babala kuphela izinga lentwasahlobo. Sayila ngokutsha intwasahlobo ngexabiso elithile lokuqala loxinzelelo. Oku kwaqinisekisa ukuba umsebenzisi uziva exhathisa ngoko nangoko, kunye nomthwalo opheleleyo ekwandisweni okupheleleyo kwahambelana nokujoliswe kuko. Olo tshintsho lunye lwenze ukuba imveliso izive yobuchwephesha kunye nomgangatho ophezulu.
Iinguqu eziNtathu eziphambili
Ukubala umthwalo, kufuneka uqonde amaxabiso amathathu ahlukeneyo. Ngamnye udlala indima ebalulekileyo ekusebenzeni kokugqibela kwentwasahlobo.
- Ireyithi yaseNtwasahlobo (k)[^ 3]: This is the spring's stiffness, kulinganiswa ngamandla ngeyunithi nganye yomgama (I-E.G., lbs/intshi okanye N/mm). Ikuxelela ukuba angakanani amandla ongezelelweyo afunekayo kwi-intshi nganye okanye i-millimeter nganye oyolula intwasahlobo.
- Ukuhamba (X)[^ 4]: Nguwo lo umgama umthombo oye wanwenwa kuwo ukusuka ekuphumleni kwawo, okanye "simahla," ubude.
- Uxinzelelo lokuqala[^2] (IT): La mandla ahlanganiswe entwasahlobo ngexesha lokuvelisa. It's the load you must apply just to separate the coils before it even starts to stretch.
| Iyaguquguquka | Uphawu | Inkcazo |
|---|---|---|
| Ireyithi yaseNtwasahlobo | k | Ukuqina kwentwasahlobo. |
| Umgama wokuHamba | X | Ukude kangakanani intwasahlobo isoluliwe ukusuka kubude bayo obukhululekile. |
| Uxinzelelo lokuqala[^2] | IT | I amandla alayishwe kwangaphambili[^ 5] ukubamba iikhoyili ndawonye xa uphumle. |
Kutheni? Uxinzelelo lokuqala[^2] Eyona mpazamo ixhaphakileyo?
Your spring isn't engaging when you need it to. Kukho i-lag ebonakalayo ngaphambi kokuba iqalise ukutsala, ebangela ukuziphatha okungahambelaniyo kwakho indibano yomatshini[^6].
Oku kuqhwala kungenxa yoxinzelelo lokuqala oluphantsi okanye olungalunganga. La mandla omthwalo wangaphambili lolona tshintsho lungahoywanga, ukanti imisela umthwalo ofunekayo phambi kokuba intwasahlobo iqalise ukolula, 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. Intlakohlaza abayiyileyo yayinesantya esomelele ngokwaneleyo sasentlakohlaza, kodwa yayiphantse ingabinangxaki yokuqala. Oku kwakuthetha ukuba kwii-intshi ezimbalwa zokugqibela zokuhamba, njengoko intwasahlobo yayisiba mfutshane, umthwalo wehla waya phantse ku-zero. Kwakungekho "snap yokugqibela" ukutsala ucango kwi-latch. Senze intwasahlobo entsha ngesantya esifanayo kodwa songeza inani elibalulekileyo loxinzelelo lokuqala. Olo tshintsho luncinci lunikeze ukutsalwa rhoqo okufunekayo ukuvala ucango ngokukhuselekileyo ngalo lonke ixesha.
Apho Intlupheko yokuqala ivela khona
Ukuxinezeleka kokuqala akuyongozi; luphawu olwenziwe ngabom ngexesha lenkqubo yokuvelisa.
- Inkqubo yokuBiyela: Njengoko ucingo lwasentwasahlobo lubhijelwa kumatshini, ijije kancinane. Oku uxinzelelo lwe-torsional[^7] yinto ecinezela iikhoyili ngokuqinileyo omnye komnye.
- Umsebenzi: La mandla akhelwe-ngaphakathi aluncedo kwizicelo ezininzi. Igcina iindibano ziqinile, inqanda ukurhashaza ukusuka kungcangcazelo, kwaye iqinisekisa a isixhobo sigcinwe ngokukhuselekileyo[^8] kwindawo yayo yokuphumla. Amandla apheleleyo entwasahlobo yakho ahlala eyisixa salo mandla okuqala kunye namandla asuka ekuzoluleni.
| Umba | Intlakohlaza eneTension yokuqala | Intlakohlaza eneLow Uxinzelelo lokuqala[^2] |
|---|---|---|
| Ekuphumleni | Iikhoyili zibanjelwe ndawonye ngokuqinileyo. | Iikhoyili ziyachukumisa kodwa zahlukana ngokulula. |
| Utsalo lokuqala | Ifuna amandla abalulekileyo ukuqala nje ukolula. | Ifuna amandla amancinci ukuqala ukolula. |
| Ukusetyenziswa okuqhelekileyo | Iingcango zesikrini, trampolines, iinkqubo ezinokurhoxiswa. | Izixhobo ezinovakalelo, iinkqubo ezichaseneyo. |
Uyisebenzisa njani iFomula kwiNgxaki yokwenyani yehlabathi?
Ifomula ibonakala ingekho. You're not confident about how to plug in your own numbers and get a reliable answer for your specific application, causing delays in your project.
Ungasebenzisa ifomula ngendlela elula, inkqubo inyathelo ngenyathelo. Ekuqaleni, define your spring's properties (izinga, uxinzelelo lokuqala, free length). Emva koko, misela ubude bakho bokusebenza ukubala uhambo. Ekugqibeleni, faka la maxabiso kwifomula.
Kutshanje sisebenze nenjineli yeemoto eyayiyila i-latch egcwele intwasahlobo yegumbi leeglavu.. Iinkcukacha bezichaneke kakhulu. Ilatshi ibifuneka ukuze uzive ukhuselekile kodwa kube lula ukuyivula. Injineli isinike owona mthwalo kanye bebewufuna kwindawo ebambeke ngokupheleleyo. Sisebenzise ifomula yokubala umthwalo umva. Sasiwazi umthwalo ofunekayo kunye nomgama wokuhamba, ngoko sinokusebenza umva ukucacisa indibaniselwano egqibeleleyo yesantya sasentlakohlaza kunye noxinzelelo lokuqala. Oku "kuyila ngokubala" indlela igcine ulingo oluninzi kunye neempazamo ngeeprototypes zomzimba kwaye yazifikelela kumdlalo wokugqibela, indawo esebenzayo ngokukhawuleza.
Umzekelo wokubala weNyathelo ngeNyathelo
Let's walk through a complete example.
Khawucinge ukuba unentwasahlobo enezi nkcukacha zilandelayo:
- Ubude obusimahla (L₀): 2 intshi
- Ireyithi yaseNtwasahlobo (k)[^ 3]: 10 lbs/intshi
- Uxinzelelo lokuqala (IT): 5 lbs
Umbuzo: Uthini umthwalo opheleleyo xa intwasahlobo isolulelwa ubude obude (L₁) ye 6 intshi?
-
Bala umgama wokuHamba (X):
Travel = Extended Length - Free Length
X = 6 inches - 2 inches = 4 inches -
Bala Umthwalo ukusuka Kolulela:
Load from Travel = Spring Rate × Travel
Load from Travel = 10 lbs/inch × 4 inches = 40 lbs -
Bala Umthwalo Uphelele:
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
Impendulo yokugqibela ithi 45 lbs.
| Inyathelo | Ukubala | Isiphumo |
|---|---|---|
| 1. Fumana Ukuhamba (X)[^ 4] | 6" (L₁) - 2" (L₀) |
4 inches |
| 2. Fumana Umthwalo kuHambo | 10 lbs/inch (k) * 4" (X) |
40 lbs |
| 3. Fumana Umthwalo opheleleyo | 40 lbs + 5 lbs (IT) |
45 lbs |
Ukuqukumbela
To calculate an extension spring's load, kufuneka usebenzise ifomula epheleleyo. Njalo ukongeza ukunyanzeliswa kokuqala kumandla okwenziwa yisantya sentwasahlobo kwaye uhambe ngesiphumo esichanekileyo.
[^ 1]: Ukuqonda le fomula kubalulekile kuyilo oluchanekileyo lwasentwasahlobo kunye nokusebenza.
[^2]: Funda ukuba uxinzelelo lokuqala luchaphazela njani ukusebenza kwentwasahlobo kunye nokuphendula kwiinkqubo zoomatshini.
[^ 3]: Fumanisa ukuba izinga lentwasahlobo likuchaphazela njani ukuqina kunye nomthamo womthwalo wemithombo.
[^ 4]: Ukuqonda umgama wokuhamba ngundoqo ekuqinisekiseni ukuba intwasahlobo yakho isebenza ngokufanelekileyo.
[^ 5]: Phonononga ukubaluleka kwamandla alayishwe kwangaphambili ekuphumezeni ukuziphatha onqwenelekayo entwasahlobo.
[^6]: Funda ukuba izibalo ezifanelekileyo zomthwalo wentwasahlobo zinokuphucula njani ukuthembeka kweendibano zoomatshini.
[^7]: Ukuqonda uxinzelelo lwe-torsional kubalulekile ekuqinisekiseni umgangatho kunye nokusebenza kwemithombo.
[^8]: Funda ngokubaluleka kwemithombo ekugcineni uzinzo kunye nokusebenza kwezixhobo.