The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments. Demonstration of simple static and dynamic balancing of two, three and four rotating masses Dynamic balancing of rotating mass systems by calculation and vector diagrams triangle and polygon TM - Experiment A model four cylinder engine that shows the primary and secondary forces and moments when balancing reciprocating masses.
The figure is drawn from the viewpoint of a frame rotating with the shaft, hence the centrifugal forces. The next step is to place your first trial weight.
The test assembly includes a balanced steel shaft mounted horizontally on low friction bearings. We will write a custom essay sample on Lab Report specifically for you for only.
Moment of X is equal to 0 because summing moments about X. A rotating system of mass is in dynamic balance when the rotation does not produce any resultant centrifugal force or couple.
This means the weight at plane 1 can contribute to the vibration acquired at bearing 1 as well as the vibration acquired at bearing 2. On this tab you can verify the proper signals are being acquired from the tachometer and two accelerometers by pressing the Acquire button.
So does the weight at plane 2. Unfortunately, unless previous balancing information is available, the location of the heavy spot cannot be identified directly. In modern dynamic balancing machines, indicating or recording devices are provided to show the position and extent of the unbalanced masses.
Using the Software Figure 5. Balance weights, whatever their type or purpose, should always be located as close to the plane of the unbalanced mass as possible.
A sturdy base unit holds a test assembly on four flexible mounts. The static method of balancing, in this case, is not reliable because it gives no indication of the position of the bias in relation to axial length.
These off-axis vibration forces may exceed the design limits of individual machine elements, reducing the service life of these parts. After adjustments were made from calculations The system, after according adjustments were made from calculated values for radii and angles, was balanced and no vibration occurred at low and higher angular velocities of the pulley.
The 1st Trial Tab. The process of the demo is illustrated in Figure 5 above. Vectors In this case is mark to allow determination of the axial positions of the other two bodies to achieve dynamic balance. The table of bearing Figure 3. Once again, press the Acquire button to record the trial data.
You also can use the Save button to save a whole set of measurement results instead of marking them down manually. The whole system consists of a rotor, two bearings, two accelerometers and one optical tachometer. Radius changed by 20mm: Find out the intersection and get mark and mark.
They share a common characteristic that the rotors are quite narrow and have no axial swash motion. APM Dynamic Balancing of Rotating Machinery in the Field By E. L. THEARLE,1 SCHENECTADY, N. Y. This paper describes a method and portable equipment for balancing rotating machinery while running under.
Dynamics Lab Report (Forced Vibration) Unit 5 Balancing of Reciprocating Masses. Beam Deflection Lab. Balancing of Rotating Masses Report. Fatigue Test. Flow Control.
Documents Similar To Dynamic Balancing Report. Computerized Gear System. Uploaded by. thesanfranista.comhran (UTHM) Dynamic Balancing of Rotors (Ppt) Uploaded by. mech experiment report balancing rotating masses abstract the purpose of the experiment was to take an unbalanced system with rotating masses and adjust the Practical - Experiment 2 Report - Balancing Rotating Masses - MECH Intermediate Mechanical & Space Dynamics - StuDocu.
For dynamic balancing, rotors are classified in two major categories, e.g., the rigid and flexible rotors.
In fact, the same shaft of a rotor can be considered as rigid if it is operating much below its first critical speed and the flexible when it is operating near or above the first critical speed.
MECH Experiment 2 report Balancing rotating masses ABSTRACT The purpose of the experiment was to take an unbalanced system with rotating masses and adjust the radii and angles of the two outer masses in order to achieve a balanced system. View Lab Report - Static and Dynamic Balancing Experiment from ME at Louisiana State University.
ME Machine Design Lab Section 8 Static and Dynamic Balancing %(4).Dynamic balancing lab report