Numru ta' snien Z
Irkaptu taċ-ċanfrin spirali
Irkaptu taċ-ċanfrin spirali
It-trasmissjoni tal-ger magħluqa ġeneralment għandha veloċità ogħla. Sabiex tittejjeb l-istabbiltà tat-trasmissjoni u tnaqqas l-impatt u l-vibrazzjoni, huwa aħjar li jkollok aktar snien. In-numru ta' snien tal-pinion jista' jkun z1=2040. Trażmissjoni tal-ger miftuħ (nofs-miftuħ), minħabba li s-snien tal-ger huma prinċipalment mikula, sabiex jipprevjenu li l-irkaptu ma jkunx żgħir wisq, m'għandhomx jintużaw wisq snien għall-pinion, ġeneralment z{{2} }.
Angolu tal-helix
β>0 huwa xellug-;
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Żift tas-snien
pn=ptcos (is-sottoskritti n u t jirrappreżentaw il-marki tad-direzzjoni normali u l-wiċċ tat-tarf rispettivament)
Modulu
The modulus refers to the ratio of the pitch p between the two adjacent teeth on the same side tooth profile to the circumference ratio π (m=p/π), in millimeters. Modulus is one of the most basic parameters of modulus gear teeth. The modulus of straight, helical and conical gears can all refer to the standard modulus series table (GB/T 1357-1987).
mn=mtcos
m=p/ π
The index circle of the gear is the basis for designing and calculating the size of each part of the gear, and the circumference of the index circle of the gear=πd=z p
Il-modulu m huwa parametru bażiku li jiddetermina d-daqs tal-irkaptu. Irkaptu bl-istess numru ta 'snien għandu modulu akbar, u d-daqs tiegħu huwa wkoll akbar.
angolu tal-pressjoni
rb=rcos =1/2mzcos
At the tangent point P of the pitch circles of the two gears, the acute angle between the common normal line of the two tooth profile curves (ie the force direction of the tooth profile) and the common tangent line of the two pitch circles (ie the instantaneous direction of motion at point P) is called The pressure angle is also called the engagement angle. For a single gear, it is the tooth profile angle. The pressure angle of a standard gear is generally 20". In some occasions, =14.5 degree , 15 degree , 22.50 degree , and 25 degree are also used.
Dijametru taċ-ċirku tal-indiċi
d=mz
Distanza taċ-ċentru
a=1/2m(z1 flimkien ma z2)
Kundizzjonijiet korretti tal-malji
m1=m2, 1= 2, 1= 2
In order to prevent the gear from undercutting, for the standard straight-edge cylindrical gear with =20o, z1 Greater than or equal to 17 should be taken. Z2=u·z1.
Il-koeffiċjent tal-għoli tal-addendum u l-koeffiċjent tat-tneħħija tar-ras
—Ha, C
Meta żewġ gerijiet huma mqabbda, it-tarf tas-snien ta 'ger wieħed dejjem jidħol fl-għerq tas-snien tal-ger l-ieħor. Sabiex tiġi evitata l-espansjoni termali milli topping u li jkun hemm spazju għaż-żejt lubrikanti, l-għoli tal-għerq tas-snien huwa meħtieġ li jkun akbar mill-għoli tal-ponta tas-snien. Għal din ir-raġuni, huma introdotti l-koeffiċjent tal-għoli addendum u l-koeffiċjent ta 'tneħħija tar-ras.
Sinna normali: ha =1; C=0.25 Snien qasir: ha =0.8; C=0.3
