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All Journal Piston: Jurnal Teknologi JUVOTEK JURNAL: Jurnal Vokasi Teknik
Nurul Shadrina Bintang
Politeknik Teknologi Kimia Industri Medan
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics

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Pengujian Mekanik (Kekerasan dan Impact) Logam Ferro Valve Plat Double Dampers yang Digunakan Sebagai Penyaring Abu Boiler Herry Darmadi; Arie Erza Erlangga Zebua; Nurul Shadrina Bintang; Agustin Nurya Savitri; Sorta Lumbantoruan
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Juni 2026
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.134

Abstract

Double damper also known as a double flap damper, is a special control device used in the ash transfer system of a boiler before it enters the multi-cyclone. Mechanical testing (hardness and impact) is the most effective test for obtaining an overview of the mechanical properties of a material. Although hardness testing is only performed at a single point, or a specific area, the hardness value is quite valid in indicating the strength of a material. By conducting a hardness test, a material is easily classified as ductile or brittle. Impact testing is a test that uses rapid loading. In mechanical testing, there are differences in the type of load given to the material. Tensile testing, compression testing, and torsion testing are tests that use static loads. Meanwhile, impact testing uses dynamic loads. In rapid loading, also known as impact loading, a large energy absorption process occurs from the kinetic energy of a load that impacts the specimen. This energy absorption process will be converted into various responses in the material such as plastic deformation, isterisis effects, friction, and inertia effects. The purpose of this study is to determine the hardness value of the Double Dampers Valve Plate and to determine the strength of the Double Dampers Valve Plate through the impact test method. The test results obtained the hardness value of test material 1 (0°C) = 111.3 HRC, test material 2 (25°C) = 108.033 HRC, and test material 3 (100°C) = 103.9 HRC. In the impact test, the results of the impact strength analysis of test material 1 (0oC) = 0.215 Kg.m/mm2, test material 2 (25°C) =0.235 Kg.m/mm2, and test material 3 (100°C)= 0.255 Kg.m/mm2.
Besarnya Bending Stress Pada Roda Gigi Lurus Akibat Tekanan Sepasang Roda Gigi Di Bunch Crusher PT Abc Gio Fadli Situmorang; Herry Darmadi; Nurul Shadrina Bintang
JURNAL VOKASI TEKNIK Vol 3 No 03 (2025): November Issue | JUVOTEK JURNAL
Publisher : MEDAN TEKNO SOLUSI

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The object of the research observed is the magnitude of the bending stress on the straight gear that causes pressure on a pair of gears in the bundle crusher. Bunch crusher is a tool that functions to thresh the bunches left in the empty bunches by pressing the bunches between two rollers that rotate in opposite directions. At the end of the roller is a shaft and is installed two straight gears that are connected to each other and when the two straight gears are connected to each other, rotating, the gears experience bending stress. Bending stress is the stress that occurs due to the bending moment. The bending moment occurs because it is influenced by the moment arm that is formed. The study aims to determine the magnitude of the bending stress on the gears in the bundle crusher due to the pressure of a pair of gears. From the results of the study, it was concluded that the magnitude of the bending stress on the upper gear of the bunch crusher when separating the bunches from the bunches of boiled fruit is 8.8 kg/cm2. and the magnitude of the bending moment that occurs on the upper gear of the bundle crusher is 65.934 kg.cm.
Co-Authors Agustin Nurya Savitri Arie Erza Erlangga Zebua Gio Fadli Situmorang Herry Darmadi Sorta Lumbantoruan