ZLY Hard Tooth Cylindrical Gearbox Selection Guide
H1: ZLY Cylindrical Gear Reducer Selection Guide
ZLY is a two-stage hard tooth surface cylindrical gear reducer manufactured according to JB/T8853
, with a center distance of ZLY112 to ZLY710, a transmission ratio of 6.3 to 20, and nine installation
configurations. Its load-bearing capacity is limited by two independent constraints: mechanical
strength and heat dissipation.
H2:Selection method of ZLY hard tooth surface gear reducer
1. Known parameters and conditions
Name of prime mover, power P1=kW, speed n1=r/min
Working machine name, power P2=kW, speed n2=r/min
The required transmission ratio i=n,/n,
The number of working hours per day is h, the number of starts per hour is times, and the operatin
g cycle per hour is%
Load characteristics (steady, impact, severe impact). Reliability requirements (general, high, high)
Environmental temperature ℃, on-site heat dissipation conditions, cooling water temperature ℃
Coupling type. Does the gear shaft shaft need to withstand additional forces when extended
Assembly method type, output shaft rotation direction (please specify the main rotation direction
when rotating in both
directions)
Do you have any other special requirements
H2. Select the specification and model of the toothed cylindrical reducer
according to the rated power
The nominal input power P of the parallel axis series gearbox (Table 9-20) is stable under load,
with a daily working time of less than or equal to 10 hours and no more than 5 starts per hour.
The allowable starting torque is twice the working torque. When the gearbox operates in a
unidirectional manner, the safety factor of the contact strength between a single pair of gears is
about 1, and the failure probability is less than or equal to 1%. When the gearbox operates in a
bidirectional manner, the PA should be multiplied by a factor of 0.8-1.0 depending on the situation
. When the reverse load is large and the direction change is frequent, the reliability factor K should
be selected. If the factor is low, the smaller value should be taken. Otherwise, the larger value
should be taken, 、
The rated power of the selected gearbox must meet: P (: 2 P: KAK; K。≤PA
Where:
Pc - Calculate power
P2- Working machine power
KA - Usage factor
KS - start-up coefficient
KR - Reliability coefficient
H3. Verify according to the allowable thermal power
The allowable thermal power P of the parallel axis series gearbox is suitable for 100% continuous
operation at an ambient temperature of 20C per hour and a power utilization rate (P2/P1 · 100%)
of 100%. It must be adjusted when the conditions are different.
Please send your required power, output speed, torque and installation space drawing, our engineer will recommend the suitable gear model for you for free. CAD 2D / 3D STEP files available upon request.