Gear Transmission: Design Principles, Force Calculation And Applications of High-Speed Light-Load Gear Pairs

1. Characteristics and Classification of High-Speed Light-Load Gear Pairs

1.1 Main Characteristics

• Extremely high rotational speed (linear speed can reach 50-150 m/s)

• Relatively small load (tooth surface contact stress is usually <800 MPa)

• High precision requirements (ISO 3-5 grade accuracy)

• Strict dynamic performance requirements (low vibration, low noise)

• High requirements for temperature rise control (to prevent thermal deformation from affecting meshing)

• Prominent demand for lightweight design

1.2 Classification Methods

By Gear Type

• Involute spur gears

• Helical gears (single-helical teeth, double-helical teeth)

• Herringbone gears

• Bevel gears (straight teeth, spiral teeth)

By Material Type

• Metal gears (alloy steel, titanium alloy, etc.)

• Non-metallic gears (engineering plastics, composite materials)

• Mixed-material gears

2. Design of High-Speed Light-Load Gear Pairs

2.1 Core Design Criteria

• Dynamic balance criterion: Ensure that the vibration during high-speed operation is controlled within the allowable range.

• Thermal balance criterion: Control the meshing temperature rise to avoid the impact of thermal deformation.

• Precision retention criterion: Ensure the precision stability during long-term operation.

• Fatigue life criterion: Although the load is relatively light, high-cycle fatigue still needs to be considered.

• Noise control criterion: Meet high-standard acoustic performance requirements.

2.2 Key Parameter Design Principles

Module Selection

• Small modules are usually adopted (0.5-3 mm).

• It should meet the requirement: m ≥ (0.01-0.02)a, where "a" is the center distance.

Number of Teeth Design