Analisis Pengaruh Radial Clearance Dan Ketebalan Magnet Terhadap Gaya Radial Pada Passive Magnetic Bearing

Yassin, Alittio Fatah (2019) Analisis Pengaruh Radial Clearance Dan Ketebalan Magnet Terhadap Gaya Radial Pada Passive Magnetic Bearing. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penggunaan bearing tentu memiliki tujuan untuk mengurangi gesekan yang terjadi di antara kedua komponen yang saling bersentuhan dan bergerak secara berotasi maupun translasi. Pengaplikasian deep groove ball bearing pada poros kendaraan, transimisi maupun elemen mesin lainnya berfungsi untuk mengurangi hambatan yang terjadi pada poros tersebut. Penelitian magnetic bearing ini diharapkan mampu menjadi inovasi yang tepat guna sebagai upaya dalam mengurangi gesekan yang terjadi pada elemen mesin yang bersangkutan. Dalam penelitian ini, prosedur penelitian dilakukan dengan beberapa tahapan yang dimulai dengan menganalisis sumber literatur baik dari jurnal, buku maupun penelitian sebelumnya mengenai magnetic bearing. Analisis penelitian dilakukan dengan meneliti pengaruh eccentricity inner magnet ke arah radial dilakukan setiap 10% dari masing – masing variasi udara untuk mengetahui eccentricity yang optimum dalam menghasilkan gaya radial. Variasi radial clearance sebesar 5 mm, 4 mm, 3 mm, 2 mm dan 1 mm. Selanjutnya perubahan diameter luar inner magnet dan diameter dalam outer magnet yang menghasilkan perbedaan ketebalan inner dan outer magnet yang berbeda – beda dengan batas minimum tebal magnet yang diizinkan sebesar 1 mm. Dengan menggunakan volume yang konstan, nilai lebar magnet mengikuti perubahan diameter dengan nilai lebar maksimum 45 mm. Penelitian ini menggunakan software Ansys Electronics Maxwell 3D untuk membuat permodelan hingga proses simulasi dari radial passive magnetic bearing dengan penyelesaian secara magnetostatis. Hasil simulasi dinyatakan berhasil apabila telah sesuai dengan parameter desain yang telah ditentukan. Berdasarkan hasil penelitian, terlihat bahwa perubahan eccentricity berbanding lurus dengan gaya yang dihasilkan. Diperoleh besar eccentricity paling optimum yaitu sebesar 90% dari radial clearance. Dengan menggunakan eccentricity tersebut, radial clearance sebesar 2 mm merupakan radial clearance yang paling optimal dalam menghasilkan gaya radial. Ketebalan inner dan outer magnet yang sama merupakan konfigurasi magnetic bearing terbaik dalam menghasilkan gaya radial yang maksimal, yaitu dengan ketebalan sebesar 3,5 mm. Hal ini disebabkan oleh nilai flux density yang lebih besar dari variasi radial clearance dan tebal magnet yang lain.
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The use of bearings certainly has a purpose to reduce
friction that occurs between the two components which are touch
each other and move in rotation and translation. The applications
of deep groove ball bearings are on the shaft of the vehicle,
transmission and other engine elements serves to reduce the
obstacles that occur on the shaft. Magnetic bearing research is
expected to be an effective innovation in an effort to reduce
friction that occurs in the engine elements in question.
In this study, the research procedure was carried out with
several stages starting with analyzing literature sources both
from journals, books and previous research on magnetic
bearings. The analysis of the research was carried out by
examining the effect of eccentricity inner magnets in the radial
direction carried out every 10% of each air variation to
determine the optimum eccentricity in producing radial forces.
Radial clearance variations are 5 mm, 4 mm, 3 mm, 2 mm and 1
mm. Furthermore, changes in the outer diameter of the inner
magnet and the inner diameter of the outer magnet which results
in differences in the thickness of the inner and outer magnets
which are different - the minimum permissible thickness of the
magnet is 1 mm. By using a constant volume, the value of the
magnetic width follows the change in diameter with a maximum
width of 45 mm. This study uses Ansys Electronics Maxwell 3D
software to make modeling to the simulation process of radial
passive magnetic bearings with magnetostatic completion. Simulation results are declared successful if they are in
accordance with predetermined design parameters. Based on the results of the study, it appears that the
change in eccentricity is directly proportional to the force
produced. Obtained the most optimum eccentricity that is equal to 90% of radial clearance. By using the eccentricity, a radial clearance of 2 mm is the most optimal radial clearance in producing radial forces. The same inner and outer magnet thickness is the best magnetic bearing configuration in producing the maximum radial force, with a thickness of 3.5 mm. This is caused by the value of the flux density which is greater than the variation in radial clearance and the thickness of the other magnets.

Item Type:	Thesis (Undergraduate)
Additional Information:	RSM 621.822 Yas a-1 2019
Uncontrolled Keywords:	Radial clearance, Tebal magnet, Flux Density, Eccentricity, Radial passive magnetic bearing
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Yassin Alittio Fatah
Date Deposited:	25 Oct 2021 06:26
Last Modified:	25 Oct 2021 06:26
URI:	http://repository.its.ac.id/id/eprint/61466

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