Sci-tech Balance of Reciprocating Masses Machine Model MT 065 is a bench-mounting model four-cylinder engine that shows primary and secondary forces and moments in reciprocating masses and how to balance them.
– Model four-cylinder engine assembly held on a cantilever supported on a bench mounted pillar
– Includes a Control and Instrumentation Unit to process the force and moment signals. The unit also has an electronic drive control – to adjust and display the engine speed accurately
– Shows both primary and secondary forces and moments and how to balance them
– Simulates one, two and four cylinder engines
– Variable crank angle settings and additional piston masses – for a range of tests
– Highly visual – ideal for classroom demonstrations
– Works with the oscilloscope (Optional) to show dynamic force and moment waveforms for popular engine arrangements and compare them with theory
A robust support pillar fixes to a suitable table or bench (supplied optionally) with a low natural frequency. The pillar holds a cantilever that holds a model four-cylinder engine. The model engine has a crankshaft, connecting rods, bushes, pistons and a cylinder block. A separate Control and Instrumentation Unit (included) controls a motor that turns the engine crankshaft.
The crankshaft has adjustable sections. Students can rotate each section relative to the others to change the crank angles. To avoid affecting the experiments, balance the crank sections for all crank angles, even allowing for the connecting rods.
• Primary and secondary forces and moments in popular engine configurations – one, two and four cylinder.
• Primary and secondary forces and moments for different crank settings.
• The effect of adding additional mass to one or more pistons for any chosen crank setting.
• Comparing calculated forces and moments with actual results.
Bench space needed: 1000 mm x 1000 mm (allowing for the oscilloscope)
Note – the bench must be strong and heavy – and have a low natural frequency
Electrical supply: 220 VAC to 240 VAC phase to neutral or phase to phase 50 Hz to 60 Hz at 1.5 A