2JK Mine Hoist Product Introduction

1. Product Overview

2JK series mine hoists are double-drum single-rope winding hoisting equipment, mainly used in vertical or inclined shafts of coal mines, metal mines and non-metallic mines, and undertake the lifting and lowering tasks of ore, gangue, equipment and personnel. 

Its design complies with the "Coal Mine Safety Regulations" and AQ 1035-2007, GB/T 20961-2007 and other standards. It has the characteristics of compact structure, strong lifting capacity and stable operation. 

It is especially suitable for small and medium-sized mines with an annual output of less than 1.2 million tons and a depth of less than 400 meters.

2. Core structure and design features

Main shaft device:

The drum adopts an integral or split structure (for underground installation), made of Q345A high-strength steel, with engineering plastic spiral rope grooves pressed on the surface to reduce wire rope wear;

The main shaft and the drum are connected by a flat high-torque friction connection, and adjustable double-row roller bearings are configured at both ends, with a transmission efficiency of ≥90%.

Braking system:

Disc brake: rear-mounted cylinder design, braking force is provided by disc springs, driven by hydraulic stations (response time <0.3 seconds), braking torque ≥3 times the maximum static torque;

Supports secondary braking and electro-hydraulic proportional adjustment, and automatically triggers safety braking when power is off.

Transmission system:

Reducer: Optional planetary gear or cylindrical gear reducer, hardened tooth surface design (material 20CrMnTi carburizing and quenching), smooth transmission and low noise;

Speed regulation system: Supports variable frequency speed regulation (energy saving more than 30%) or resistance speed regulation, and is compatible with PLC control to achieve remote monitoring.

3. Safety protection function

Real-time monitoring: integrated sensors for overspeed, overwinding, rope loosening, brake shoe wear, spring fatigue, etc., interlocked with the main motor for control;

Dual depth indication: combination of mechanical arch type and digital type, positioning accuracy error <0.5m;

Emergency mechanism: automatic braking when power is off, broken shaft protection and emergency braking redundancy design, in line with GB 16423 safety regulations.

4. Application scenarios and restrictions

Applicable scenarios:

Transport of ore and personnel in vertical or inclined shafts (explosion-proof models JKB series must be selected);

Suspending hoisting plates and water pumps during vertical shaft excavation (load ≤ 160kN).

Restrictions:

Non-explosion-proof models are strictly prohibited from being used in explosive environments containing gas/coal dust;

Limitation on the number of wire rope winding layers: single layer for people and double layers for cargo in vertical shafts; double layers for people and triple layers for cargo in inclined shafts.