Agusta 03,2021
Zaɓin nau'in tsarin hatimin injiniya wani muhimmin mataki ne a cikin tsarin ƙira, dole ne a fara bincike:
1.Working sigogi -Media matsa lamba, zazzabi, shaft diamita da kuma gudun.
2. Medium halaye - maida hankali, danko, causticity, tare da ko ba tare da m barbashi da fiber impurities, ko yana da sauki vaporize ko crystallization.
3. Halayen aikin mai watsa shiri da yanayin muhalli - ci gaba ko aiki na tsaka-tsaki; Mai watsa shiri da aka shigar a cikin dakin ko fallasa; Abubuwan da ke kewaye da yanayin yanayi da canjin yanayin zafi.
4. Mai watsa shiri na hatimi don ba da damar ɗigogi, jagorar ɗigo (leakawar ciki ko ƙyalli na waje) buƙatun; Rayuwa da buƙatun aminci.
5. Mai watsa shiri akan girman hani na tsarin hatimi.
6. Aiki da kuma samar da tsarin kwanciyar hankali.
Da fari dai, bisa ga sigogin aiki P, V, T zaɓi:
Anan P shine matsakaicin matsa lamba a kogon hatimi. Dangane da girman girman P, za'a iya ƙaddamar da farko ko za a zaɓi tsarin daidaitaccen tsari da ma'auni na ma'auni.Domin matsakaicin matsakaici mai zurfi, mai kyau mai kyau, p ≤ 0.8MPa, ko ƙananan danko, rashin tausayi na matsakaici, p ≤ 0.5MPa, yawanci suna amfani da tsarin da ba daidai ba.Lokacin da ƙimar p ta wuce kewayon da ke sama, ya kamata a yi la'akari da daidaitaccen tsari.Lokacin da P ≥ 15MPa, tsarin ma'auni na gaba ɗaya-ƙarshen yana da wahala don saduwa da buƙatun hatimi, ana iya amfani da wannan lokacin a cikin jerin hatimi mai yawa.
U shine saurin dawafi na matsakaicin diamita na farfajiyar rufewa, kuma yana ƙayyade ko nau'in roba yana juyawa tare da axis gwargwadon ƙimar darajar U, wanda ke amfani da tsarin jujjuya nau'in bazara ko tsarin da aka ɗora a bazara. Gabaɗaya U kasa da 20-30m / s za a iya amfani da juyawa-nau'in bazara, yanayi mafi girma, saboda rashin daidaituwa na sassa masu juyayi sauƙi yana haifar da girgiza mai karfi, yana da kyau a yi amfani da bazara. Tsarin tsaye.Idan darajar P da U duka biyu suna da girma, la'akari da amfani da tsarin hydrodynamic.
T yana nufin yawan zafin jiki na matsakaici a cikin ɗakin da aka rufe, bisa ga girman T don ƙayyade kayan haɓakar kayan aiki na kayan aiki, hanyar kwantar da hankali da kuma tsarin tsarinta.Tsarin T a lokacin 0-80 ℃, zoben taimako shine yawanci zaba nitrile roba O-ring; T tsakanin -50 - +150 ℃, bisa ga lalata ƙarfi na kafofin watsa labarai, da zabi na fluorine. roba, silicone roba ko PTFE shiryawa filler zobe ne available.When da yawan zafin jiki ne kasa da -50 ko sama da 150 ℃, roba da polytetrafluoroethylene zai samar da low zazzabi embrittlement ko high zafin jiki tsufa, wannan lokaci za a iya amfani da karfe bellows structure.When da turbidity na matsakaici ne mafi girma fiye da 80 ℃, shi ne yawanci wajibi ne a yi la'akari da shi a matsayin high zafin jiki a cikin sealing filin, da kuma m. Dole ne a dauki matakan sanyaya.
Sakandare, zaɓi bisa ga halayen kafofin watsa labarai:
Lalacewa mai rauni matsakaici, yawanci amfani da ginanniyar hatimi na inji, ƙarshen ƙarfin hali da kuma jagorancin watsa labaran watsa labaru ya fi dacewa idan aka kwatanta da nau'in waje. Domin mai karfi mai lalata, saboda zaɓin kayan bazara ya fi wuya, zaka iya amfani da shi. waje ko polytetrafluoroethylene bellows inji hatimi, amma kullum kawai m P ≤ 0.2-0.3MPa range.Easy zuwa crystallize, sauki don ƙarfafa da kuma high danko. matsakaici, ya kamata a yi amfani da guda spring Rotary tsarin.Saboda kananan marẽmari suna sauƙi toshe tare da daskararru, high danko kafofin watsa labarai zai haifar da kananan spring axial ramu motsi katange.Flammable, fashewar, mai guba kafofin watsa labarai, domin tabbatar da cewa kafofin watsa labarai ba ya zubo, biyu. -Ya kamata a yi amfani da tsarin ƙarewa tare da abin rufe fuska (ruwan keɓewa).
Bisa ga sama aiki sigogi da kuma kafofin watsa labarai halaye na zaba tsarin ne sau da yawa kawai na farko shirin, da karshe ƙuduri dole ne kuma la'akari da halaye na rundunar da wasu musamman bukatun ga sealing. Misali, da rundunar a kan jirgin wani lokacin a cikin. domin samun ingantaccen sarari, girman hatimi da wurin shigarwa galibi ana yin buƙatu masu tsauri. A cikin waɗannan lokuta, ba za a iya zaɓar tsarin daidaitaccen tsari akai-akai ba, amma dole ne a tsara shi musamman ga takamaiman yanayin aiki, kuma a ɗauki matakan da suka dace.
Lokacin aikawa: Agusta-20-2021