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One of the important conditions for ensuring this is the high quality of the material and the manufacture of compressor parts, their uninterrupted lubrication at roll, trim and under rolling conditions. The compressors of ship refrigeration plants, in addition, are subject to the requirements of high reliability of operation with a large motor resource. The increase in the number of cylinders and the creation of spatial schemes of their location made it possible to solve the problem of complete balancing of inertia forces and apply multi-rotation - the main means of reducing mass per unit of productivity. Modern compressors are made multi-cylinder (from 2-4 to 16 cylinders), medium and high-speed: relatively short-speed with an S/D ratio of the piston stroke to the cylinder diameter of 0.6-0.8 and a rotation speed of 800-1750 rpm. Ship refrigeration units are usually provided with medium and large gland compressors. These are compressors of single-stage refrigerators. Refrigeration compressors designed to operate in a wide range of suction and discharge pressures are considered universal. It is designed for constant suction of steam formed in the evaporator during boiling of refrigerant, compression and its delivery to the condenser. The compressor is the main and most complex unit of the steam refrigerator.
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The designed design of the compressor is recommended for implementation on ships of the transport and fishing fleet. Strength calculation was carried out in order to evaluate the strength of compressor parts at stresses arising in the sections under consideration. Thermal calculation was carried out to determine the main performance characteristics: volumetric productivity, compressor power consumption, as well as an effective cooling factor.Īt the input of the gas path calculation, the area and main dimensions of the flow sections of the valves were determined, determined based on the condition of limiting losses to overcome the gas dynamic resistance in them based on permissible flow rates of refrigerant steam.ĭuring dynamic calculation forces and moments acting in compressor are determined, counterweight and flywheel are calculated.
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The calculation is based on the specified source data. The purpose of the course design is to design the compressor based on the data obtained during the calculation. The object of development is a refrigerated four-cylinder compressor for working on ammonia. The course work contains 4 sheets of drawings, an explanatory note of 30 Art., 6 tables, 4 drawings, bibliographies of 5 sources, 3 annexes.ĪMMONIA COMPRESSOR, THERMAL CALCULATION, DESIGN SELECTION AND OPTIMIZATION OF PARAMETERS, GAS PATH CALCULATION, DYNAMIC CALCULATION, STRENGTH CALCULATION. 25stĭetermination of the cooling capacity of the designed compressor at the standard operating mode 26 pts Strength calculation of compressor parts 24 ptsĭetermination of compressor motor power. 17 stĭefinition of fly masses and flywheel design. 14 ftĬonstruction of the calculated indicator diagram.įirst and second order inertia forces. 12 ftĭetermination of mass of unbalanced moving parts. 11 stĬalculation of main parameters of the pressure valve. 11 ftĬalculation of main parameters of the suction valve. 11 stĭetermination of diameters of suction and delivery branch pipes. 7 stĭesign selection and optimization of main compressor parameters9Ĭalculation of compressor gas path. Thermal calculation of compressor in operating mode. If you're trying to fix an issue with AutoCAD or F/X CAD, we highly recommend trying the Reinstall option before uninstalling and reinstalling.Description of compressor operation and design. The Uninstall option is quite drastic and will remove personal settings. For more information, please see our Land F/X Scope of Support page.Īre you attempting to reinstall AutoCAD or F/X CAD to address a problem with the program? The Reinstall function, available within the Uninstall options, doesn't wipe out all your settings and can fix a number of issues. Important: Are you uninstalling to fix an issue with a version of F/X CAD or AutoCAD that's older than the two most recent year versions? These older versions are considered "Legacy" and require a $50 fee for each re-installation. You may need to uninstall an existing version of AutoCAD or F/X CAD on your computer because you are: Moving from AutoCAD to the same year of F/X CAD? Do this too.Step 3: Delete some specific Autodesk-related files and folders.Step 2: Uninstall all Autodesk products.