Durable Electric Mining Winch For Underground Use
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Durable Electric Mining Winch For Underground Use
Operating environment: Designed for harsh underground conditions – resistant to dust, water, and explosive hazards. Also works for surface mining.
Mine types: Covers coal mines (needs explosion‑proof certification) and metal mines (including non‑ferrous and ferrous).
Typical jobs:
- Hauling: Moving mine cars, repositioning equipment, transporting roof support materials.
- Hoisting: Personnel transport in vertical/inclined shafts, lifting ore, lowering tunneling gear.
- Transport: Moving materials along horizontal tunnels, heavy towing on ramps.
- Mounting spots: Shaft top / pit bottom, inclined shaft hoist rooms, tunnel chambers, fixed work points near the working face.
Base load‑bearing structure: One‑piece welded high‑strength frame, box‑beam design – good torsion and vibration resistance.
Core functional units:
- Drum system: Multi‑layer winding drum (with rope guide), rope anchor. Hard‑faced with wear‑resistant alloy.
- Drive system: Hardened gear reducer (planetary / helical gear), coupling, drive shaft.
- Brake system: Disc brake / shoe brake, hydraulic / pneumatic power unit – explosion‑proof certified.
- Power system: Explosion‑proof or standard motor, control cabinet – supports VFD speed control.
- Safety system: Overwind protection, slack rope protection, load sensor, depth indicator.
How It Works & Operating Logic
Motor drive: Squirrel‑cage induction motor – flameproof type for underground use. VFD control gives stepless speed adjustment.
Reduction & braking:
Reduction: Hardened gear reducer turns high speed low torque into low speed high torque – transmission efficiency ≥90%.
Braking: Two systems – service brake (normal stop) and emergency brake (panic stop). Hydraulic/pneumatic servo control. Brake response time ≤0.2 s.
Load control:
Closed‑loop system monitors rope tension and lifting load in real time.
Constant‑speed hoisting / constant torque output. Automatically detects load weight and adjusts running parameters.
Works with depth indicator for precise travel control – prevents overwind and overrun.
Key Technical Specs (Typical Configuration)
| Parameter | Typical Range | Notes |
|---|---|---|
| Rated Load | 5–100 t (custom up to 200 t) | Graded by mining class; heavy-duty models exceed 200 t |
| Rope Speed | 0.5–10 m/s (VFD adjustable) | VFD systems support 0.1–12 m/s stepless speed regulation |
| Drum Capacity | 50–1000 m (customized by shaft depth) | Available with single-layer or multi-layer winding |
| Motor Power | 15–500 kW | Selected according to load and speed requirements; explosion-proof motors require certification |
| Power Supply | 380V / 660V / 1140V three-phase AC | Underground mines typically use 660V or 1140V explosion-proof power supply |
| Working Slope | 0° (horizontal) to 45° (inclined shaft) | Steep-slope applications require anti-slip protection devices |
Safety & Mining Compliance
- Explosion‑proof design: Coal mine equipment must meet GB 3836.1. Uses flameproof motor and intrinsically safe control system. Has Exd I Mb certification.
- Safety protection system:
- Emergency brake: Automatically engages on power loss – braking distance ≤0.5 m.
- Overload protection: Stops and alarms when load exceeds 110% of rated.
- Overwind protection: Mechanical + electronic dual limit – prevents overwind and overrun.
Materials, Durability & IP Rating
Main structure: Drum forged from Q345B or 45# steel. Frame welded from thick steel plates – tensile strength ≥600 MPa.
Wear parts:
Drum surface hard‑faced with wear‑resistant alloy, hardness ≥HRC45.
Wire rope galvanized or plastic‑coated, breaking force ≥1.5× rated load.
Gear surfaces carburized and hardened, hardness ≥HRC58.
Industrial rating: IP54. Works in -20°C to 40°C, 95% humidity underground. Some models also have CE and ATEX certifications.
Installation, Operation & Maintenance
Installation requirements:
Must be bolted to a concrete foundation with adequate strength – levelness error ≤0.1‰.
Underground installation must leave space for ventilation and maintenance, interface with gas monitoring, and stay away from gas accumulation points.
Operation features:
Three modes: manual, automatic, remote.
Visual HMI with fault diagnosis display – easy to use.
Daily maintenance:
Daily: check brake shoe wear, rope tension, and lubrication.
Weekly: measure temperature and vibration of reducer and motor.
Monthly: calibrate depth indicator and overload protection. Full disassembly and inspection every six months.
Customization & Selection Support
Load rating:
From 5 t to 200 t as needed.
01
Rope length:
Drum capacity customized by shaft depth.
02
Control options:
Standard electric / PLC control / VFD control.
03
Voltage options:
380V, 660V, 1140V, 3300V.
04
Special versions:
Corrosion‑resistant, high‑temperature resistant – built for different mine conditions.
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