Double Enveloping Worm Gear

Advantages

Introduction and Advantages

Worm (or worm gear) and Wormgear (or worm wheel) transfer power 90 degree and can have relatively large range of gear ratio so they have been used in many industries for centuries. But in general, wormgears are also known for their bad efficiencies, noises and frequent maintenance.

Unlike cylindrical wormgear sets, Double Enveloping worm and gear are wrapping (“enveloping”) each other by optimization design technology so they have (1)much more teeth contacts, (2)much stronger, (3)much higher efficiency, (4)much lower NVH(Noise, Vibration, Harshness), and (5)much longer life.

Compare to its output, power, Double Enveloping Worm gear set has relatively smaller size and lighter weight so its applications are widely spread in most industrial fields. Most of all, its high efficiency, long life, and low maintenance characteristics could be the best solution for high precision industries, electric vehicles, and renewable energy fields, such as, solar trackers.

 

Comparison

Comparative

1) Gear Size Comparison//Double Enveloping Worm Gear/ General Worm Gear

2) Contact Pattern Comparison / Double Enveloping Worm Gear Comparison/General Worm Gear

  • Double Enveloping Worm Gear
SIDE VIEW FRONT VIEW HALF-SECTION CONTACT PORTION
  • General Worm Gear
SIDE VIEW FRONT VIEW HALF-SECTION CONTACT PORTION

3) Efficiency and Output Comparison

Gear Ratio Double Enveloping Worm Gear Efficiency General Worm Gear Efficiency
30:1 80% 75%
40:1 76% 70%
50:1 73% 66%
Double Enveloping Worm Gear Output General Worm Gear Output
1.40hp (1,210 in.Lb.) 0.78hp (630 in.Lb.)
1.05hp (1,155 in.Lb.) 0.61hp (617 in.Lb.)
0.84hp (1,110 in.Lb.) 0.50hp (591 in.Lb.)
Applications

Applications

Renewable Energy & Generation Equipment
Wind turbine(Yaw Drive, Pitch Drive)/ Solar Generation (Solar Tracker Reducer)

Elevator / Escalator
Main Gear Box

Electric Vehicles
Main Gearbox, Steering System, Power Seat, Sun Roof, Power Window, Various Optional Systems

Air Crafts / Vessels
Landing Gear, Fin Control, Valve/Pump Control

Industrial Machines /Robots
Mid/Small Reducers, Precision Motion Control System

Industrial / Construction Machines
Turning System, Hoist, Excavator, Folk Lift, Truck Lift