High Torque Mining Mixer With Pneumatic Gear Motor
The Pneumatic Gear Motor High Torque Mining Mixer uses a geared pneumatic motor as its power source, employing compressed air (pressure: 0.4~0.63MPa) underground to drive a pair of precision-meshing gears to output power.
- Product Introduction
The Pneumatic Gear Motor High Torque Mining Mixer uses a geared pneumatic motor as its power source, employing compressed air (pressure: 0.4~0.63MPa) underground to drive a pair of precision-meshing gears to output power. Matched with a reduction structure to amplify torque, it drives the mixing shaft and impellers to rotate at low speed under heavy load. Powered purely by air without any electrical components, it is the preferred high-torque mixing equipment for underground coal mines with gas hazards.
Core Characteristics of Gear Pneumatic Motors
Ultra-stable torque output
Torque fluctuation controlled within ±2%, delivering sustained low-speed high torque without speed surges under variable loads. Ideal for long-term mixing of high-viscosity, easily precipitated mine slurry.
Robust structure & extended service life
Power transmission via gear meshing eliminates easily worn blades and piston rings; only gears and bearings suffer wear. Its continuous full-load service life is 2–3 times that of vane pneumatic motors, supporting nonstop all-day underground operation.
Consistent forward/reverse torque
Smooth rotation switching, facilitating grout washing tank and caked material removal.
Built-in overload stall protection
When impellers are jammed by gravel or solidified slurry, the motor simply stops without overheating or burnout. It restarts instantly once the load is cleared, perfectly adapting to variable heavy-load mine working conditions.
Complete Machine Structure
Power Head
High-torque gear pneumatic motor with sealed dustproof and waterproof housing resistant to water splashes and coal dust ingress. Equipped with built-in speed control valve and reversing switch for stepless speed regulation; standard silencer reduces underground noise.
Hardened Gear Reducer Box
Secondary torque amplification and speed reduction (standard rotating speed: 20~120r/min), suitable for mixing thick heavy slurry.
Main Mixing Shaft & Wear-resistant Impellers
Made of quenched 45# steel or stainless steel; optional anchor-type, ribbon-type and paddle-type impellers. Ribbon impellers work best for high-consistency paste backfill materials.
Matching Mixing Tank (Vertical Agitation Tank)
Mainly available in 50L/100L/200L/300L capacities, standard for underground grouting and hole sealing. Fitted with discharge ball valve and sewage outlet.
Pneumatic Accessories
Pressure regulating filter, oil mist lubricator and high-pressure air pipe connectors.
Core Advantages
Ultimate Explosion-proof Safety
No electric motors or coils installed, eliminating electric spark and static ignition risks. It can operate round-the-clock in explosion-prone zones with gas and coal dust, fully complying with gas prevention, dust control and fire protection requirements specified in the Coal Mine Safety Regulations. It shuts down immediately upon power or air cut-off with zero hidden safety hazards.
Superior Resistance to Harsh Environments
Tolerates high humidity, underground water splashes and coal mud immersion
Resists dust, surrounding rock vibration and wide temperature fluctuations
Stable operation within -20℃~120℃; self-cooled by air expansion during operation without heat accumulation.
Excellent Adaptability to Heavy-load Mixing
Abundant low-speed torque effortlessly agitates high-solid-content, high-specific-gravity and easily-settling materials
Strong loaded startup capacity; directly stirs settled cement and tailings at tank bottom without manual cleaning
Self-adaptive load performance: the motor automatically reduces rotating speed and boosts torque when slurry viscosity and resistance rise.
Simple Operation & Low Maintenance Cost
One-key start-stop, free forward/reverse rotation and stepless speed adjustment. Fewer internal components; only regular pneumatic oil lubrication required for daily upkeep, enabling convenient underground maintenance. Lightweight overall design allows single-person transfer to all roadway working faces.
Mixable Materials
(Full Coverage of Underground Mine Grouting, Backfilling & Support Materials)
Roadway Grouting for Water Blocking & Surrounding Rock Reinforcement (Most Widely Used)
Ordinary cement slurry, ultra-fine cement grout
Cement-water glass double-liquid quick-setting grout (requires uniform rapid mixing due to fast coagulation)
Cement mortar (contains fine sand aggregate with high self-weight resistance)
Acrylate, polyurethane chemical leakage-sealing grout paste (high-viscosity resin slurry)
Special Hole-sealing Materials for Gas Drainage Drilling Holes
Expansive cement hole sealant, polyurethane hole-sealing colloid, polymer sealing slurry. Even mixing guarantees tight gas blockage without air leakage.
Cemented Paste Backfill Materials for Goafs (High Torque Mandatory Scenario)
High-consistency full tailings backfill (tailings + cement + water, paste with solid content over 70%)
Gangue, gravel & cement backfill slurry (contains hard particles which easily stall low-torque ordinary mixers)
Fly ash backfill flame-retardant slurry
Roadway Shotcrete & Wall Spraying Support
Wet-sprayed concrete, sand-concrete mixture, quick-setting shotcrete mortar
Underground Coal Mine Fire Prevention & Extinguishing Materials
Yellow mud grouting flame-retardant slurry, gel fireproof colloid, fly ash inert inhibitor slurry
Auxiliary Materials for Roadway Repair
Fast-hardening gypsum repair mortar, epoxy slurry for roadway crack repair, mine anti-corrosion coating
Performance Comparison of Different Drive Types
| Drive Type | Torque Stability | Explosion-proof Performance | Continuous Service Life | Applicable Scenarios |
| Gear Pneumatic Motor | ★★★★★ (Most Stable) | Highest, Top Choice for Gas Underground Mines | Longest | Intermittent & All-day grouting, hole sealing, small & medium backfilling, universal for viscous slurry |
| Vane Pneumatic Motor | ★★★ | Qualified Explosion-proof | Shorter | Short intermittent mixing, low-viscosity thin slurry |
| Hydraulic Motor | ★★★★★ | Extra explosion-proof protection required | Long | Large-volume goaf backfilling, heavy-duty mixing in open-pit mines |
| Explosion-proof Electric Motor | ★★★ | Complex explosion-proof structure with potential risks | Average | Fixed ground mixing stations in roadways without gas hazards |
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