Balance of Reciprocating Masses

Using the model, mass forces can be investigated on a reciprocating piston machine. The model
has four pistons with plastic sleeves that do not require lubrication. The quadruple cranked
crankshaft is driven by an electronically commutated DC motor via a toothed belt. The
rotational speed is regulated and displayed digitally. Forces and moments are measured using
strain gauges on the elastic boom of the model mounting bracket. All electrical functions are
integrated into the control unit that also provides an analogue output for an oscilloscope. The
crank offset for each cylinder can be continuously adjusted, as an aid marks are provided at 90°,
180° and 270°. The natural frequencies are defined such that resonant oscillations are easy to
detect even without instrumentation.

Learning Objectives/Outputs: Run up curve (effect of mass forces); Comparison of different
crank arrangements(four cylinder, symmetrical, 180° crank offset; four cylinder, unsymmetrical,
90° crank offset; two cylinder, 180° crank offset; single cylinder)

Technical Data:

Cylinder machine (number of cylinders: 4; piston mass: 36g; additional mass:
41g); Crank mechanism (crank radius: 15mm; piston stroke: 30mm; connecting rod length:
70mm; cylinder centre distance: 35mm); DC motor (speed range: 100...3000min‐1, nominal
power output: 36W); Resonant speeds (±50min‐1) Or Equivalent

Motesta Instruments is one of India's most trusted Civil & Mechanical Engineering Lab Equipment Manufacturers for bulk tender supply of Balance of Reciprocating Masses. We deliver against Ministry of Education tenders, World Bank funded projects, ITI/Polytechnic supply contracts and turnkey lab setup orders for Engineering Colleges and Universities worldwide.

For tender quotations on Balance of Reciprocating Masses (Code: MOT-MTE-0018), our tender desk provides:

• Detailed Technical Specifications matched line-by-line to your tender BOQ
• OEM Authorization Letters and ISO/CE compliance certificates
• EMD & Bank Guarantee support documentation
• Custom branding on labels & control panels for institute identity
• Voltage variants (110V/220V/three-phase) for the destination country
• Multi-language documentation (English, French, Spanish, Arabic on request)
• Container loading photos and pre-shipment inspection reports

Read more about MoE Tender Supply