INCREASING THE CURRENCY RESISTANCE OF CYLINDER-PLASTING OF PYSTON PUMPS BY PLASMA METHOD

The article examines the study of increasing the wear resistance of the cylinder-sleeve of a piston pump using the developed technology of plasma spraying. Wear-resistant and durable coatings of nickel, chromium, molybdenum and tungsten were obtained on the surface of the piston pump cylinder-sleeve. A graph of the dependence of the coating thickness depending on the surface hardness of the cylinder-sleeve is presented. According to the graph, depending on the hardness, you can determine the wear resistance of the coating surface of the cylinder-sleeve. Keywords: piston pump, cylinder liners, plasma method, nickel, chromium, molybdenum, tungsten, wear resistance, coating thickness, hardness, graphical dependence

Development of the Fuel Briquette Compression Machine for Palm Residue

The objectives of this research is developed the fuel briquette compression machine and studied the properties of fuel briquette of palm residue from a community palm oil production process in Thailand. The palm residue from a community palm oil production process had a palm meat and a mixed fiber. It was a material for testing. The fuel briquette has the standard shape. Because palm meat and fiber are tough to make fuel therefore the design and building of fuel briquette compression machine were hydraulic system. The fuel briquette compression machine was developed to be easy to use and increase production rate of fuel briquette. The fuel briquette compression machine from palm residue was divided of 3 Hp motor, hydraulic pump, cylinder, and forming mold set. The ratios of ingredients for testing of fuel briquette extrusion (palm residue : water : cassava starch) were 1:1:1, 2:1:1, 3:1.5:1, and 4:1.5:1 kg. The experimental pressures were 108, 147 and 196 N/cm2. From the result, it was found that the production rate of fuel briquette was higher than S. Wannapakhe (2018)’s. The properties of fuel briquette were passed the standard except the property of density value that was near the standard. The highest of production rate by using pressure, was 20 kg/cm2 at the ratio of ingredients of 4:1.5:1 kg.

Hemolysis and methemoglobinemia in a child with left ventricular assist Levitronix PediMag

A 5-month-old male was treated with left ventricular assist device due to cardiac failure secondary to dilated cardiomyopathy. The patient developed acute severe intravascular hemolysis with methemoglobinemia and renal failure, related to a mechanical problem due to pump cylinder misalignment. Secondary severe methemoglobinemia has not been previously described in patients undergoing ventricular assist device. Early detection of the signs and symptoms of hemolysis is crucial to prevent further complications.

Root cause analysis of rough conical seat grinding problem in fuel pump cylinder head by Shainin methodology

Problem solving plays a major role in quality engineering and it is popularly adopted by manufacturing industry. This study is aimed to determine root cause for rejection of cylinder head due to rough conical grinding problem by Shainin method. This has two major parts, first is diagnostic part which involves finding out the root cause and second is a remedial action part which consist of actual application of findings to rule out the problem. Wear in tool holder assembly is identified as root cause for rough grinding problem. Converging to root cause and validating the same achieved by successful implementation of Shainin tools.