Tugas Akhir Mesin
PENGARUH VARIASI PANJANG POROS DAN BERAT PEMBEBANAN TERHADAP PUTARAN KRITIS POROS (WHIRLING SHAFT)
Very many application of a rotating shaft in a machining construction. The shaft that functions to transmit the power supplied from one component to another component is always happened rotational motion. This move often causes the shaft to become curved and can be break. The biggest curvature that occurs on the rotating shaft is caused when a critical speed occurs (critical speed), this phenomenon is called the whirling effect. Therefore, in this research will be to design a tool to get round the critical speed of a rotating shaft. This research was conducted with an experimental method using a critical speed test. In this critical speed tool will be tested with some the length axis variation and the masses (disk) that be assambled on the shaft between the two bearings and then rotated using an electric motor. And the critical round value in the experimental method will be validated with theoretical calculations. The test uses 12 volt DC motor with a maximum round (n) of 3000 rpm and a critical speed engine test equipment on a 304 stainless steel shaft rod with a diameter of using the Arduino controller with PID algorithm. In other words, the critical speed will be faster when the shaft is getting longer. The value of the critical rotation speed the greater the shaft used the shorter and the critical rotation value will be higher if the shaft is longer. Giving a load on the shaft will also accelerate the occurrence of critical rotation. In the two-way ANOVA test, shaft length variations significantly influence critical rotation (Fhitung > Ftabel = 60.9924 > 3.554557) and the variations in the mass position of the load can also have a significant effect on critical rotation (Fhitung > Ftabel = 754.4373 > 3.554557)
Very many application of a rotating shaft in a machining construction. The shaft that functions to transmit the power supplied from one component to another component is always happened rotational motion. This move often causes the shaft to become curved and can be break. The biggest curvature that occurs on the rotating shaft is caused when a critical speed occurs (critical speed), this phenomenon is called the whirling effect. Therefore, in this research will be to design a tool to get round the critical speed of a rotating shaft. This research was conducted with an experimental method using a critical speed test. In this critical speed tool will be tested with some the length axis variation and the masses (disk) that be assambled on the shaft between the two bearings and then rotated using an electric motor. And the critical round value in the experimental method will be validated with theoretical calculations. The test uses 12 volt DC motor with a maximum round (n) of 3000 rpm and a critical speed engine test equipment on a 304 stainless steel shaft rod with a diameter of using the Arduino controller with PID algorithm. In other words, the critical speed will be faster when the shaft is getting longer. The value of the critical rotation speed the greater the shaft used the shorter and the critical rotation value will be higher if the shaft is longer. Giving a load on the shaft will also accelerate the occurrence of critical rotation. In the two-way ANOVA test, shaft length variations significantly influence critical rotation (Fhitung > Ftabel = 60.9924 > 3.554557) and the variations in the mass position of the load can also have a significant effect on critical rotation (Fhitung > Ftabel = 754.4373 > 3.554557)
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