Analisa Beban Maksimum Yang Dapat Diangkat CRAWLER CRANE XCMG QUY55

Crawler crane is one type of crane that can move in a project location using a crawler as wheels for moving. This analysis aims to determine the maximum load that can be lifted Crawler Crane XCMG QUY55 using main boom 52 m with variation working radius crane 34 m and 12 m, and Crawler Crane XCMG QUY55 using main boom 34 m and fixed jib 15,25 m, with variation working radius of cranes 30 m and 18 m. The data used for the calculation analysis is the total weight of counter weight, unit weight of crane, total weight of main boom, total weight of fixed jib, and weight of hook block. The calculation analysis is done by calculating all the moments in the crane, until be find the maximum load can be lifted crane. From the calculation results, find the maximum load that can lift the crane on each variation of analysis that is: P1 = 1.331,986 kg, P2 = 14.973,429 kg, P3 = 5.605,293 kg, P4 = 10126.437 kg

Analisa Tegangan Maksimum Wire Rope Dan Hook Pada Overhead Hoisting Crane Kapasitas 7,5 Ton

ABSTRACT Wire rope and Hook are components that function as work equipment on overhead hoisting crane units. This analysis aims to determine the maximum stress that can be resisted by the wire rope and hook on the overhead hoisting crane by calculating the maximum tensile wire rope, hook tensile stress and hook pressure tension. Data collection is done by measuring on the wire rope and hook. Then do the calculation analysis on the wire rope and Hook using equations according to theory. The result of calculation of maximum tensile stress on wire rope type 6x37 = 222 x 1c at 451,55 (kg / mm2) and on wire rope type 6x19 = 114 x1c equal to 519,69 (kg / mm2). Results of calculations on single hook large tensile stresses of 6.14 (kg / mm2), for compressive stresses of 3.59 (kg / mm2) and at double hook large tensile stresses of 6.09 (kg / mm2), for compressive stress of 3.34 (kg / mm2). So the tensile stress and maximum hook pressure does not exceed the maximum allowable voltage of 10 (kg / mm2). Keywords: Crane, wire rope, Hook, Voltage, Security usag

Studi Gasifikasi Berbahan Bakar Briket Batubara Terhadap Temperatur Pembakaran

In the recent years, energy has become a crucial issue in the world. The energy crisis caused by growth of population and depletion of world oil reserves along with the emission issue from the fossil fuels gives pressure to each country to immediately produce and use renewable energy. Coal briquette is a renewable energy which is also very potential in Indonesia. By using gasification technology, coal briquettes are burned with limited oxygen to produce a fuel-burning methane gas. The testing of coal briquette gasification aims to find out the effect of diameter size on combustion temperature, boiling temperature of water, effective flame and thermal efficiency of the furnace. The research began by supplying air from the blower with 6.5 m/s speed. Then, diameter sizes variations on coal briquettes were apllied. The diameter size used were 10 mm, 15 mm, and 30 mm. Afterwards, combustion temperature and boiling temperature of water were measured per one minute. The fidings showed that variations on diameter size were highly significant on the combustion temperature, boiling temperature of water, effective flame and thermal efficiency of the furnace produced. In the diameter size of 10 mm, the highest burning temperature was 588.33 0C, the boiling temperature was for 94 minutes, the flame effective was for 94 minutes, and the thermal efficiency of furnace was by 36.88 %. Next, in the diameter size of 15 mm, the highest burning temperature was 513.33 0C, the boiling temperature was for 78 minutes, the flame effective was for 78 minutes, and the thermal efficiency of furnace was by 39,14 %. Lastly, in the diameter size of 30 mm, the highest burning temperature was 705.66 0C, the boiling temperature was for 55 minutes, the flame effective was for 55 minutes, and the thermal efficiency of furnace was by 40.11 %. Keywords : gasification, coal briquette, diameter siz

Analisa Kerusakan dan Perbaikan Diesel Engine Low Power pada Unit Wheel Loader Doosan SD 200 N

Low engine power is a condition where the power generated from the engine decreases, causing the unit to not operate optimally. This analysis aims to determine the types of damage to low power diesel engines, the causes of low power diesel engines, and how to repair low power diesel engines. The inspection procedure begins with checking the engine oil, oil filter, turbocharger fuel filter, and fuel injection pump (FIP) components. Next, analyze the low power diesel engine by disassembly and continue checking. The results found that the intake valve pushrods and exhaust valves in cylinders 1 to 6 were worn out. The cause of this happened because the mechanic did not perform regular maintenance both before and after the unit operated, the timing valve clearance has a large enough gap so that adjusting valve clearance cannot be done, and the pushrod component materials are not in accordance with the standard part book. The repair step is to replace the pushrod component with a new one (replace)

Analisa Gaya pada Telescope Boom dengan Variasi Panjang Lengan Boom dan Sudut Kerja Boom pada Unit Rough Terrain Crane Kato Kr20h

Telescope boom is an attachment to facilitate rough terrain cranes in doing work that functions as a weight lifter to move it from one place to another. The telescope boom on the rough terrain crane unit has 4 sections in which the first section is called the baseboom. While the Elevating cylinder is an attachment to help move the telescope boom up and down. Both of these attachments are driven by a hydraulic system. This calculation aims to determine the reaction force that occurs in the telescope boom with a number of variations. The first variation is the change in arm length with a fixed work angle (80º), then the second variation is the change in work angle with a fixed arm length (26.4m). And know the pump power needed by the elevating cylinder to lift the telescope boom due to the reaction force of the loading. From the results of the calculation of the reaction force with variations in arm length is the longer the arm on the telescope boom, the reaction force that occurs on the telescope boom will be even greater, while the variation of the working angle is the greater angle on the telescope, the reaction force on the x axis (Ax & Bx) the smaller the reaction force on the y-axis (Ay & By) does not experience much change in value. And for pump power with variations in arm length is the longer the boom arm, the greater the power needed to pump the elevating cylinder, while the variation in work angle does not affect much of the power needed to pump the elevating cylinder