Yadda za a rufe shaft?

Babban aikin kowane mai ɗaukar hoto shine hana yayyowar wannan ruwa daga wani wuri da ke kewaye. Haka abin yake ga hatimin shaft, wanda ke kama mai a kan magudanan da ke tsaye da kuma masu juyawa. Don yin aikinsu da kyau, dole ne a tsara su da kyau kuma a sanye su da kayan rufewa waɗanda ke da juriya ga lalacewa da canjin yanayin zafi. Na karshen - wanda ya dace a sani - yana da wani muhimmin aiki. Wannan shi ne kariya ga man da kansa daga shigar da ƙazanta na waje da danshi.

Yaya ake gina su?

Ɗaya daga cikin muhimman abubuwan da aka fi sani da hatimin busassun bututu shine zoben karfe. Yana da tsarin tallafi na musamman don kayan hatimi mai dacewa. Bugu da ƙari, muhimmiyar rawa tana taka rawa ta hanyar bazara, wanda ke danna lebe mai rufewa a kan shinge tare da karfin da ya dace. Wannan yana da mahimmanci musamman lokacin da igiya ke juyawa, saboda a nan ne mafi girman haɗarin zubar da mai ba tare da kulawa ba. Ƙarshen baya fitowa saboda siffar da ta dace na lebe mai rufewa, da kuma saboda amfani da abin da ake kira. tasirin meniscus mai ƙarfi.

NBR kuma watakila PTFE?

Shaft seals suna amfani da kayan rufewa daban-daban, dangane da misali. wurin rufewa, yanayin aiki (gami da matsin mai da ke aiki akan mashin), da zafin aiki. Don haka, hatimin shaft ɗin ruwa mai ruwa ya ƙunshi nau'ikan kayan rufewa iri-iri, daga nitrile roba (NBR) zuwa polytetrafluoroethylene (PTFE). Amfanin da ba shi da shakka na tsohon shine juriya mai girman gaske tare da kyakkyawar juriya mai kyau ga canjin zafin jiki a cikin kewayon daga -40 zuwa + 100 digiri C. Bi da bi, ana iya amfani da sealants polytetrafluoroethylene a cikin yanayin zafi mara kyau, tk. -80 zuwa +200 digiri C. Har ila yau, suna nuna juriya mai tsayi sosai, kuma a lokaci guda mafi girma don lalacewa idan aka kwatanta da hatimi bisa ga roba na nitrile. Kewayon tafasasshen hatimi kuma ya haɗa da wasu gyare-gyare na roba: polyacrylic da fluorine. A cikin yanayin su, fa'idar ita ce babban juriya ga yanayin zafi, tare da matsakaicin juriya ga ƙananan yanayin zafi (a cikin kewayon -25 zuwa -30 digiri C). Hatimin FKM shima yana jure mai sosai.

ƙarni na farko ko na biyu?

Shaft like suna halin abin da ake kira shugabanci. Menene game da shi? Idan ramin yana jujjuya agogo baya, to wannan hatimin hannun dama ne. In ba haka ba, ana shigar da hatimin hannun hagu. A halin yanzu akwai tsararraki biyu na hatimin ruwa a cikin hatimin shaft. An zaɓi su a hankali tare da la'akari, musamman, yin, samfurin da shekara ta mota, da kuma sigogi na sealant kanta, kamar kauri da diamita: ciki da waje. A game da masu simintin ƙarni na farko, ana amfani da leɓuna masu rufewa tare da notches 3 ko 4. Lalacewar su, wanda tsararraki masu zuwa ba su da shi, shine leɓen rufe baki ɗaya. Wannan rashin jin daɗi yana da kyau musamman lokacin haɗa hatimin, lokacin da dole ne a kula da kulawa ta musamman don kada gefensa ya lanƙwasa. Wannan matsalar ba ta wanzu tare da hatimin tsara na biyu. Leben rufewa a nan lebur ne kuma taro yana da sauƙi: kawai zame hatimin akan shaft, ba a buƙatar kayan aiki na musamman. Bugu da kari, gefensa yana da 5- ko 6-haƙori. Duk da haka, kar a manta da sanya abin rufewa daidai a cikin soket. Manufar ita ce kawar da motsinsa da abin da ake kira axial spring.