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Coal Shearer Haulage System

Your Professional Coal Shearer Haulage System Supplier

Founded in 1998, Shaanxi Heli Mechanical Engineering Co., Ltd is a local private enterprise in Xi'an City, Shaanxi Province, China. We study and analyze the world's advanced mining equipment, and then transforms it in combination with the current situation of material technology in China, so as to improve production efficiency and save economic cost. After years of trials and hardships, it has formed a modern mechanical equipment manufacturing company integrating mechanical design, manufacturing and assembly.

Longwall Shearer Haulage Unit

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Coal Shearer External Haulage Unit

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Why Choose Us

Company Honor

We are a certified industrial enterprise research and development institution, innovative enterprise, technology-based enterprise, and high-tech enterprise.

Global Market Coverage

Our products are widely used in underground coal mining areas in Central Asia, South Asia, and various industrial markets around the world.

High-Precision Manufacturing Equipment

Our company is equipped with a variety of high-precision machining equipment, including CNC lathes, rotary lathes, horizontal milling and boring machines, vertical machining centers, and coordinate measuring machines (CMM).

Professional After-Sales Service

We offer comprehensive after-sales support, including return and exchange processing, maintenance and repair, technical support, complaint handling, and standard warranty services. This ensures that our customers enjoy worry-free operation, high-quality products, and reliable support throughout the product lifecycle.

Advantages of Longwall Shearer Haulage Unit

Enhanced Reliability and Safety: Chainless systems use toothed bars or racks that are far more reliable and durable than traditional rope or chain haulage, increasing, for example, the structural integrity of the Eicotrack system.

Chainless System Efficiency: Most modern shearers use a chainless haulage system, such as Eicotrack, which provides superior reliability and safety. These systems utilize a toothed rack fixed to the armoured face conveyor (AFC) to push/pull the machine securely along the face.

Automation: Advanced PMC control systems allow for automated operation, including drum position and height adjustment, optimizing performance.

Modular Design and Easy Maintenance: The haulage gearboxes are often designed to be fully modular, allowing them to be easily installed in the main frame. This enhances maintenance, as individual units can be replaced rather than having to overhaul the entire machine, and increases uptime.

Increased Productivity: Modern AC haulage systems are capable of pulling the shearer at high speeds (up to \(32\text{ m/min}\) or over \(100\text{ ft/min}\)) to match high-capacity cutting and loading needs.

Components of Longwall Shearer Haulage Unit

Drive Motors

Most contemporary shearers use AC Variable Frequency Drives (VFD). These electric motors are high-torque and explosion-proof, specifically designed for the harsh environments of underground mines.

Modular Haulage Gearbox

A separate, serviceable gearbox located within the mainframe that provides necessary gear reduction.

Modular Haulage Gearbox

A separate, serviceable gearbox located within the mainframe that provides necessary gear reduction.

Chainless Haulage System (Eicotrack/Pinrack)

Composed of sturdy racks fixed to the conveyor line and a vertical or horizontal drive wheel on the shearer that gears into the rack pins for traction.

Downdrive

A module that transfers power from the haulage gearbox down to the drive wheel, often designed for easy maintenance.

Parking Brake

An integral component, such as the one used in the EL3000 model, designed to hold the shearer securely on the conveyor.

How it Longwall Shearer Haulage Unit works

Modular Traction Units

The shearer mainframes usually house dedicated, modular traction units (gearboxes) at each end of the machine, which allow for high cutting speeds of up to.

Engagement

The vertical-axis drive wheels (sprockets) from the shearer engage with the horizontal rack teeth on the conveyor spill plate.

Movement

As the motors drive the sprockets, the gearboxes translate this motion into linear motion, pushing or pulling the shearer along the coal face.

Maintenance of Longwall Shearer Haulage Unit

Lubrication

The high-torque gearboxes require specialized gear oil to dissipate heat and reduce friction.

Wear Monitoring

The drive sprockets and rack bars are sacrificial components; they must be inspected regularly for "hooking" or tooth wear to prevent the machine from jumping the track.

Cooling

Because the motors and gearboxes generate significant heat, they are usually water-cooled via an internal circuit connected to the mine's dust-suppression water supply.

FAQ

Q: How does the haulage unit maintain traction on steep underground inclines?

A: The heavy-duty drive sprockets and precision-matched rack engagement ensure a constant grip without mechanical slippage.

Q: What measures are taken to protect the internal gears from dust and water ingress?

A: We use specialized multi-lip sealing systems that maintain their integrity even under high external pressure and abrasive conditions.

Q: What are the different types of longwall mining?

A: The layout of longwall could be either "advancing" type or of "retreat" type. In the advancing type, the gate roads are formed as the coal face advances. In thinner seams the advancing longwall mining method may be used. In the retreat type, the panel is a face connecting them both.

Q: What is the typical lead time for an urgent replacement of the main drive assembly?

A: We prioritize emergency mining requests and can typically dispatch core assemblies within twenty-four hours from our strategic stock.

Shaanxi Heli Mechanical Engineering Co., Ltd. is one of the most reliable coal shearer haulage system manufacturers and suppliers in China. With abundant experience, we warmly welcome you to buy high quality coal shearer haulage system in stock here from our factory. We also accept customized orders.

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