HTM72 Cam Analysis

HTM72 Cam Analysis

Bench top apparatus to demonstrate the dynamic investigation of cam mechanisms, as used in motors for actuation of the valves. The cam mechanism consists of 3 interchangeable cams and 2 different cam followers. The cams are rotated using a electronically controlled motor and pulley gear arrangement. A large inertia mass is connected between the motor and cam to ensure consistent running at various speeds.

The follower attaches to a vertically moving shaft which simulates the valve itself. On top of the shaft can be attached a number of removable masses which allow the valve mass to be changed.

Three interchangeable springs are supplied (one fitted) which allows the valve operation and response to be varied. To demonstrate "valve wobble", the spring rate, mass and speed are adjustable over a wide range.

The apparatus comes supplied with a Data Acquisition Interface and Data Acquisition Software. This captures the cam displacement over time/angle so that elevation curves can be viewed and printed.

A very visible mechanism and unit ensuring all aspects of the apparatus can be viewed during operation. A safety guard is supplied which fits over all the moving parts of the apparatus when running. A microswitch safety cut-off is fitted so that when the guard is removed the motor does not operate and rotate.

A comprehensive instruction manual for student and lecturer is provided

HTM72 Cam Analysis
  • To be portable Unit for dynamic investigations of cam and follower drives used to actuate engine valves
  • Cam mechanism to consist of 3 interchangeable cams and 2 follower (tappets)
  • Valve to be simulated by changeable disc weights and varying springs
  • Adjustable spring rate, weight, speed
  • Electric motor with speed control
  • Cam elevation and displacement recorded using a Data Acquisition Interface
  • Weights supplied
  • 3 springs with different spring rates to be selected
  • Safety cover and micro switch power cut-off
  • 110V/60Hz, 230V/50Hz, single phase supply
  • Comprehensive instruction manual
  • 2 year warranty
  • Comparison of the various cam designs
  • Elevation curves supplied by unsuitable pick-ups
  • Elevation curve for a bouncing pick-up
  • Determination of the limiting speed and its comparison with the theoretical value
  • Relationship between cam and spring force