Mechanical design systems :: essays research papers

PROBLEM STATEMENTThe design is to engineer a contain remains to operate two extrusion wreathes in verso directions to compress the caramel. The drive governing body consists of a flexible drive corpse that operates a spur gear drive, which in turn operates the extrusion rolls at equal and opposite stop numbers. The power source to this design is a basketball team horse power normal torque AC electric motor, operate at 1160 rpm. The scheme must be designed to run 24 hours per day, 3 days per week. There lead be 4 slams is the drive musical arrangement. The make love that is being driven by the flexible drive system directly is to be called shaft A, for design reference. The extrusion rolls shafts atomic number 18 to be called shaft B1 and B2, for design reference. The last shaft C is in the system only to reverse the direction of rotation of ace of the extrusion roll shafts. The speed of shaft A is to be determined by the designer. The speed of the extrusion rolls is to be 200 rpm. When designing this drive system prefigure all forces, life expectancies and stresses for both systems. The centerline distance from motor shaft to shaft A is to be 72 inches.2DESIGN DECISIONS du proportionalityn designing this multiple drive system there are umteen decisions to be made in order to successfully design the system according to the problem statement. The first is deciding whether to use a knocking drive or a chain drive one would ingest that the system is operating at fairly low speed so a chain would be ideal. The next step to designing this system is to consider and analyze a speed for shaft A. Factors must be considered while deciding the speed of shaft A. The factors are that the speed of shaft A should be high ample so that the speed ratio of the gears is large enough, so that the gear sizes make a large enough distance between extrusion rolls. When designing this system one would exact around 480 rpm. Using the rpm out of the flexible drive o ne would select the appropriate gears for the application. Which the designer will find is a uncorrectable task considering contact stress. When choosing the proper chain size and sprockets one will find that a number 40, 19 tooth n1 and a 45 tooth n2 are optimal stock components and get you fairly close to the desired 480 rpm.