ZLYJ Series Single Screw Extruder Gearbox
Description
ZLYJ Series Single Screw Extruder Gearbox
The ZLYJ Series is a purpose-built gearbox for single-screw extruders used in plastic, rubber and chemical processing. Its hardened and precision-ground gears, reinforced output-shaft support and configurable lubrication and cooling systems provide reliable transmission under continuous extrusion loads.
Product Overview
The ZLYJ Series Single-Screw Extruder Gearbox is engineered for plastic, rubber and chemical extrusion lines. It combines a hardened gear transmission with a reinforced output-shaft bearing structure designed to transmit torque while supporting the axial thrust generated during extrusion.
The gears are manufactured from low-carbon alloy steel and undergo carburizing, quenching and precision grinding. Grade 6 gear accuracy and a tooth-surface hardness of 54–62 HRC contribute to stable operation, low noise and efficient power transmission.
Multiple mounting arrangements, lubrication systems and cooling configurations are available to match different extruder designs and operating conditions.
Hardened & Ground Gears
Grade 6 precision-ground alloy-steel gears with a tooth-surface hardness of 54–62 HRC.
Efficient Power Transmission
Optimized gearing supports stable, low-noise and efficient continuous operation.
Flexible Mounting
Six assembly arrangements are available for different extruder layouts.
Lubrication & Cooling Options
Splash lubrication, forced lubrication, cooling coils and oil coolers are available.
High Axial Load Capacity
Reinforced output-shaft support helps withstand the axial thrust generated by the extruder screw.
Custom Engineering
Gear ratios, shaft dimensions and mounting interfaces can be adapted to project requirements.
Technical Specifications & Assembly Arrangements
| Specification | Value |
|---|---|
| Gearbox series | ZLYJ |
| Application | Single-screw extruders |
| Suitable screw diameter | 30–250 mm |
| Standard selection range | 35–200 mm |
| Maximum input speed | 1,500 rpm |
| Nominal gear ratio | 6.3–20 |
| Operating temperature | −10°C to 45°C |
| Gear accuracy | Grade 6 |
| Gear tooth hardness | 54–62 HRC |
| Model range | ZLYJ112–ZLYJ630 |
| Nominal input power | 7–825 kW |
| Allowable output torque | 357–105,050 N·m |
| Allowable axial thrust | 35–880 kN |
| Assembly arrangements | Types I–VI |
Technical Specifications
| Model | ZLYJ | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sizes | △ 112-8 | △ 133-8 | △ 146-10 | △ 173-10 | △ 180-10 | △ 200-12.5 | △ 225-12.5 | △ 250-16 | ※ 280-16 | ※ 315-16 | ※ 330-16 | ※ 375-16 | ※ 420-16 | ※ 450-20 | ※ 500-20 | ※ 560-20 | ※ 630-20 |
| Nominal Input Power (kW), n Input = 1500 r/min | |||||||||||||||||
| Normal Reliability | 11 | 17 | 23 | 30 | 36 | 40 | 58 | 62 | 90 | 124 | 160 | 190 | 280 | 330 | 450 | 600 | 825 |
| High Reliability | 7 | 12 | 16 | 24 | 29 | 32 | 46 | 50 | 72 | 100 | 128 | 155 | 220 | 265 | 360 | 500 | 688 |
| Allowable Output Torque (N·m) | |||||||||||||||||
| Normal Reliability | 560 | 866 | 1464 | 1910 | 2292 | 3183 | 4616 | 6316 | 9168 | 12632 | 16300 | 19355 | 28523 | 42180 | 57300 | 76400 | 105050 |
| High Reliability | 357 | 611 | 1019 | 1528 | 1846 | 2547 | 3660 | 5093 | 7334 | 10187 | 13040 | 15790 | 22411 | 33745 | 45840 | 63667 | 87605 |
| Allowable Axial Thrust of the Output Shaft (kN) | |||||||||||||||||
| Axial Thrust | 35 | 39 | 54 | 80 | 110 | 130 | 155 | 170 | 197 | 245 | 324 | 324 | 415 | 540 | 756 | 830 | 880 |
| Recommended Configuration | |||||||||||||||||
| Screw Diameter (mm) | 35 | 45 / 50 | 55 | 65 | 65 | 75 | 90 | 100 | 105 / 110 | 120 | 130 / 150 | 150 / 160 | 165 | 170 | 180 | 190 | 200 |
| Input Power (kW) | 5.5 | 8 | 12 | 16 | 22 | 26 | 38 | 45 | 50 | 65 | 90 | 120 | 160 | 212 | 288 | 400 | 550 |
| n Input | 800 | 800 | 900 | 900 | 1000 | 1000 | 1000 | 1120 | 960 | 960 | 960 | 960 | 960 | 1200 | 1200 | 1200 | 1200 |
| n Output | 100 | 100 | 90 | 90 | 100 | 80 | 80 | 70 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 |
Notes:
- △ indicates cooling. ※ indicates cooling with forced oil circulation. Cooling is not required for models ZLYJ112, ZLYJ133, ZLYJ146 and ZLYJ173 when selected according to the high-reliability ratings.
- The input power and output torque listed in the table already take the operating-condition factor into account and may be used directly for selection.
- The output torque listed in the table is the primary basis for model selection. The transmission ratio can be adjusted according to customer requirements. The ratio range of the ZLYJ Series is 6.3–20, while the ratio range of the ZSYJ Series is 22.4–100.
- When the bearing load factor fd = 1.5, the theoretical thrust-bearing life is approximately 12,000 hours for models ZLYJ133 and ZLYJ146, and approximately 25,000 hours for the other models, based on the allowable axial thrust and output-shaft speed listed in the table.
- The gearbox cooling design must be checked under the following conditions:
5.1 The gearbox is selected according to the high-reliability ratings, but the output-shaft speed exceeds the n Output value listed in the table, resulting in increased input power.
5.2 The gearbox is selected according to the normal-reliability ratings with increased input power.
5.3 When the built-in cooling system does not provide sufficient heat-dissipation capacity, an external oil cooler with an oil pump shall be used. The cooling configuration will be specified separately when ordering. - The table may be used for preliminary model selection. Before an order is confirmed, each selected model will be checked in detail to improve selection reliability.