Hybrid Loaders Joy 18HD

The Joy 18-metric ton diesel LHD is a load haul dump featuring electric drives. Compared to other LHDs in its class, the 18HD offers faster acceleration, lower fuel consumption, lower heat rejection and best-in-class breakout and rimpull – all of which contribute to the lowest total operating costs of any LHD in its class.

These key advantages are the result of our patented SR Hybrid Drive system’s unique ability to store energy and put it to use when most needed. This energy recovery delivers several benefits that significantly your Total Cost of Ownership (TCO):

• Productivity: improved work cycle performance
  • Higher acceleration and equipment cycle performance (double that of competitive LHDs)
  • Smoother operation (no gear changes)
  • Smart traction system
• Reduced operating cost
  • High efficiency electric driveline
  • 30% or more reductions in operating costs achieved compared to mechanical drive LHDs, including up to 20% reduction in fuel costs
• Increased reliability/durability
  • Decades of proven performance with SR technology on mining duty machines due to the LeTourneau legacy
  • P&H surface wheel loaders historically display utilization rates 10-20% higher than underground production LHDs
• Reduced engine size
  • Reduced emissions
  • Reduced heat load

Key Features

Safety

• ROPS/FOPS operator’s cabin provides certified protection for the operator
• Redundant braking systems provide layers of protection in the event of a single point brake failure
• Platforms, steps, stair and hand rails are designed to the world’s best standards
• Safety Integrity Level 2 (SIL 2) rated emergency stop system includes multiple e-stop switches situated in key locations around machine
• Lockable battery and starter isolation protects maintenance and service personnel
• Emergency braking system
• Reduction in fuel consumption and the smaller engine means lower diesel and heat emissions

Reliability

• Rugged steel frame structures are built strong for long life and reduced maintenance
• Ball and socket joints feature long life and a proven high-reliability design
• SR motors and generators have no commutators, brushes or rotor windings to replace
• SR Hybrid Drive system provides low operating costs with high reliability and performance
• Hydraulic systems with piston pumps provide cooler operation and longer life
• P67 modular double-insulated wiring system using standardized componentry reduces downtime and operating costs
• Central auto lubrication minimizes scheduled service activity and protects critical structural linkages and joints
• Compatible with remote health monitoring technology

Productvity

• Features SR Hybrid Drive technology with KESS (Kinetic Energy Storage System)
• Simple control suite allows the operator to concentrate on maximizing productivity
• Automated control functions, such as return to dig and return to carry, allow the operator to perform complex functions at a button press
• Intuitive human-to-machine interface provides the operator with up-to-the-moment productivity and machine performance information
• Switched reluctance hybrid drive captures and reuses braking energy, resulting in class-leading acceleration, shorter cycle times, and greater fuel efficiency
• Heavy-duty designs mean less failures and more uptime
• Bucket design mean easy filling and low wear

Operating capacities, weights and dimensions

* Standard rock bucket based on a material density of 2,000 kg/m³ (3,372 lb/yd³)

Working ranges

Bucket capacity: 8.2 m³/10.7 yd³, 10.0 m³/13.1 yd³ and 11.2 m³/14.7 yd³ bucket options available

How does the SR Hybrid Drive system work?

• During propulsion, diesel energy is converted to electric energy; an SR generator provides power to the motors in the wheels to make the machine move
• During braking, when the operator eases off the gas pedal, the flow of diesel energy stops; machine momentum keeps the motors rotating
• Energy now flows from the motors to be stored in the Kinetic Energy Storage System (KESS) unit as the traction system slows the machine
• After the machine has stopped digging or dumping its load and is ready to move again, the operator presses on the gas pedal
• The KESS starts to supply stored energy, while at the same time, the diesel engine also begins supplying energy
• Two sources of energy work simultaneously to provide the equivalent of one 400hp engine being boosted by another 550hp engine

This recapture, storage and redirection of energy can lead to a significant productivity increase. A typical block cave mining operation requires these machines to make many stops, starts and turns. The SR Hybrid Drive system enables the 18HD to accelerate much faster than comparable machines, which allows them to get from the draw point to the crusher and back again much quicker. Over the course of time, that can lead to as much as a 20% increase in tons moved. These significant increases in productivity can be achieved while using less horsepower and consuming far less diesel fuel – in some cases, up to 33% less.

Using less fuel reduces overall cost of operation and offers additional benefits related to human health and safety: primarily, reductions in diesel emissions and heat. This contributes to the protection of the mine’s most valuable human assets while potentially reducing its costs related to ventilation requirements. The mine could have the option of either: operating with a lower level of ventilation than would be required with other machines or operating a larger number of Joy LHDs without increasing ventilation.