Special Reducer for Single Screw Extruder

Product Introduction：

ZLYJ series Reduction Gearbox (speed reducer) is a transmission part for most single screw extrusion line, wihch also possesses high precision hard gear surface and thrust block designed. Designed with standard ZBJ19009-88, it combines well with most of machines from different suppliers. Also the gear and axis parts are made of high strength alloy steel with surface hardness HRC54~62. In the front end of hollow input axis there is large specification thrust bearing that will bear axial thrust force while the screw is working.

Applied Circumstance:

1. All kind of extrusion & blowing machinery

2. High speed shaft rotation Speed <1500RPM

3. Working Environment Temp. -40~45°C, with temperature below 0°C, should pre-heat lubrication oil to above 0°C

Selection of Gearbox:

1. Select speed ratio

e.g. input speed n1=1000rpm, output speed n2=70rpm, ratio i=n1/n2=14.28, should select ratio 14

2. Select model type according to input power

e.g. input power P=26kw, after checking form, 29kw>26kw, most ecomonic should be ZLYJ200

3. Select assemble type

as per actual use, select horizontal or vertical type

4. Calculate axial thrust Fa=π*Ds²*Ps/(4*1000)

e.g. Screw diameter Ds=75mm, Screw pressure Ps=26MPa

Fa=π*Ds²*Ps/(4*1000)=114.8kN

187kN>114.8kN, ZLYJ200 can bear the axial thrust and economic to select

5. Confirm connection size

6. Confirm cooling type