The large gear, as the core of transmission, meshes with the small gear through the ring gear, converting the motor's high-speed rotation into low-speed, high-torque rotation for equipment (such as ball mills and rotary kilns). The product has a heavy structure, large diameter (2.0-3.6 meters), and heavy weight (up to several tons), with wear resistance and impact resistance. The segmented design facilitates transportation and installation, and stiffening ribs enhance rigidity. The surface is quenched, with a gear surface roughness Ra ≤ 1.6μm to ensure smooth transmission.
Classification
1. By application equipment:
- Ball mill large gear (ore grinding)
- Rotary kiln large gear (ore roasting/cement kiln)
- Dryer large gear (coal slime/river sand/quartz sand drying)
- Anode furnace large gear (metallurgy)
2. By structure:
- Circular large ring gear
- Double helical ring gear
- Segmented large gear
3. By material:
- Cast steel
- Cast iron
4. By process:
- Casting
- Precision machining
Scope of application
1. Mining industry: ball mills (ore grinding), rotary kilns (ore roasting)
2. Building materials industry: cement ball mills, coal slime dryers, river sand dryers
3. Metallurgical industry: anode furnaces, granulators
4. Chemical industry: quartz sand dryers, reactors
5. Typical equipment: rotary kilns, ball mills, dryers, drying machines
Working principle
1. Transmission process: motor → reducer → small gear (high speed, low torque) → large gear (low speed, high torque) → drive equipment (such as rotary kiln rotation).
2. Key points:
- Power is transmitted through gear meshing, relying on gear surface lubrication (special grease required).
- The large gear is fixed on the equipment shell (such as rotary kiln) and rotates synchronously with the equipment.
- Segmented design reduces stress concentration and improves operational stability.
Large gear model parameter table
Model | Diameter (D) | Module (m) | Number of teeth (Z) | Applicable equipment | Material | Process | Weight (W) |
Ball mill large gear | 2.0m | 22 | 28 | 2m ball mill | Cast steel | Casting, quenching | ≈3t |
Dryer large gear | 2.4m | - | - | Coal slime drum dryer | Cast steel | Casting | ≈5t |
Rotary kiln large gear | 3.6m | - | - | Drum dryer | Cast steel | Casting, precision machining | ≈8t |
Keywords
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Large gear
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