Clutch Friction: Components, Types, and Operation

Posted on Feb 24, 2025 in Electromechanical Engineering

Clutch Friction

Friction is heavily used with mechanical disc clutches, which are simple and easy to maintain. For reasons of disk space, they can not be dry mounted and use dual clutch and multi-farm bikes and bathed in oil.

Function

It consists in bringing the disk between 2 flat plates that pressure to get turn forming a part and transmit the rotation and torque of the motor to the gearbox. When you need to disengage the clutch, the driving force that presses the disc decreases until it turns freely between the plates or hub.

Efforts

  • Torque: The engine delivers torque to the clutch for transmission to change.
  • Thrust Force: The force that the pressure plate exerts on the disk(s) is caused by the pressure mechanism to mount the clutch (springs or diaphragm).
  • Transmitted Force: The force that the clutch can transfer. Thrust force coefficient of friction. When the clutch slips, slides, the disk with the hub transport force decreases can be caused by the driver (by decreasing the driving force, half-pedal) or lack of adhesion of the disc with the hub (hot or worn).
  • Disk Maximum Allowable Pressure: The pressure that the material can withstand without being damaged disks or fatigue (Fe / Surface). Ceramic materials had enough.
  • Maximum Transmitted Torque: This is the result of applying the force the clutch can transmit at the point where they exercise that power.

Parts

  • Clutch Disc: Situated between the flywheel and pressure plate in the center is a hole in which the main shaft gear box. Its mission is to transmit motion from the steering wheel (driver) joined to the crankshaft to the primary housing (driven).
    • Attributes:
      • The disk should slide smooth progressive in order not to jerk to match the speeds between wheel and pressure plate.
      • Once in gear must be firm and transmits the torque recess.
    • Features:
      • For the smoothness of operation has a series of radial cuts at its perimeter, allowing flexibility in the center of the disc which transmits rotation.
      • For non-slip, Ferodo coated on both sides of metal disk.
  • Pressure Plate: A metal plate that presses the clutch disc against the flywheel. It is attached to the housing with an elastic device that compresses against the disc.
  • Diaphragm: This is the force exerted to push the pressure plate together with this and the outer housing. Other diaphragm instead of using springs.
  • Housing: The piece that holds the outside pressure plate and serves as the diaphragm and protect property.
  • Collar Thrust: Presses the center of the diaphragm or tilting levers that separate the pressure plate to disengage the vehicle.
  • Flywheel: The outside of this is the contact surface where the disc rests when pressure is applied through the hub.

Types

  • Friction Cone Clutch: It does not use a disk filed. It has two conical parts (male and female) which are coupled by a driving force F and friction between surfaces equals the speed of the axes. In the truck used in synchronizers manual gearboxes and bathed in oil.
  • Dual Disc Clutch: Vehicles of great power and torque, large clutch assembly is the ideal two-disc dry to reduce size and avoid construction problems and design. In agricultural dual clutch for power transmission or a dual clutch rear jack is activated from the pedal and allows you to connect without disengaging the PTO power from the engine, the first pedal disengages the PTO is disengaged fully stepping change.
  • Multi-Disc Clutch: Oil-bathed, small size ideal for mounting on the gearbox (DSG VW) and the whole motorcycle engine change. The same principles that dry clutch but use a fluid that lubricates and cools the joint while reducing friction and increasing disk life. Force to be transmitted by the clutch depends on the number of discs of the same, for a correct transformation of torque No spring the bell its size and thrust.