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Djaya, Yuhani
Fakultas Teknik UPN "Veteran" Jakarta
Electrical & Electronics Engineering Engineering

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UJI “KETAHANAN LELAH DAN PENURUNAN GAYA PEGAS “ KATUP KOMPRESI AKIBAT “BEBAN OPERASI” PADA KATUP MOTOR DIESEL OUTPUT RATED 400 kW. Djaya, Yuhani; Hatuwe, Mohammad Rusdy
Bina Teknika Vol 11, No 2 (2015): Bina Teknika
Publisher : Fakultas Teknik UPN "Veteran" Jakarta

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Abstract

Major role in the valve spring Diesel 4 strokes is able to guarantee the valve open and closed positions without loss of engine compression. Therefore, the spring must be able to maintain the style required by the valve in accordance with the needs of its operations. When the spring force reduction operations over the threshold, then the spring will be malfunctioning. Before this happens, the spring should be replaced or restored. Meanwhile, the replacement with a new one because it failed to cause unplanned downtime. To balance the needs of utilities and prevention of failure (downtime) is required prediction faill replacement, and therefore the rate of decline in the spring force is directly related to the characteristics possessed by every spring, then to determine the rate of decrease in the valve spring force necessary to test fatigue characteristics. To achieve these objectives, characteristics and fatigue testing is done with spring material Goodman line approach. These tests include the identification of test material in the form of a test spring spring material chemical composition and hardness test; namely to determine the tensile strength limit in the diagram Heigh and criteria preset limit or unpreset spring tired. Next proceed to test the rate of decrease in the spring force on the cyclic loading which is the subject of this study, in which the rate of decrease in the spring force test due to cyclic done to reach the threshold spring force on the round number above 107. The test results showed that the decrease in the spring force caused by the spring force on the rate of decline of about 6% cyclic loading is at about 300 hours of operating hours, the next spring force experienced stability.
DISAIN KAPAL PENANGKAP IKAN 10 GT BERBAHAN FIBERGLASS UNTUK WILAYAH PERAIRAN KECAMATAN PANIMBANG KABUPATEN PANDEGLANG Sudjasta, Bambang; Djaya, Yuhani
Bina Teknika Vol 11, No 2 (2015): Bina Teknika
Publisher : Fakultas Teknik UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.226 KB)

Abstract

The potential of Indonesian marine fisheries resources magnitude of ± 6.6 million tons / year, but only some can be captured by Indonesian fishermen is ± 4.7 million tons / year, partly stolen by fishermen from neighboring countries. This is due to the limited number and large size of fishing vessels operating.One of the areas that have the potential for capture fisheries is Panimbang Pandeglang District of Banten Province. Subdistrict of Panimbang the coastal region directly opposite the Sunda Strait. This region has a coastline and marine areas large enough.In order to improve the ability of the fishermen in the subdistrict Panimbang, it is necessary to build a fishing vessel that is suitable for this region. Where the design and construction of fishing vessel can be realized, then in turn the welfare of the fishermen in the region will increase.Fishing vessel designed the planned use of materials / raw materials fiberglass. This is because due to the high cost of steel plate material, problems also trouble getting wood materials. The fishing vessel design includes determining the size of the subject, the manufacturing line drawings, preparation of general plans, construction design, stability diagram, engine power and tonnage.
Co-Authors Hatuwe, Mohammad Rusdy Sudjasta, Bambang