In order to establish the straight-tooth cone gear sketches and 3D model database,To form a cone gear tooth involute profile of the spherical projection into the circle involute with the central projection,According to the principle of mechanical design make a straight-tooth cone gear sketch,The straight-tooth cone gear with thousands of items of data related to the gears sketch in the equation,In the sketch so long as change number of equivalent teeth and big end modulus and dividing round vertebral angle and tooth width data,can get the gear sketches,and 3D Features under the new data,The results indicate that like this makes the gear database the design and the processing and the teaching has the very vital practical significance,The corresponding tiles and equations can also be done using Solidworks software plug-ins.
Studying loquat kernel as material, through pulverization, filtration, centrifugation and dehydration, the starch of loquat kernel was recovered, the fiber and protein was eliminated. Meantime, possible ways for utilization was discussed.
The hydrodynamic flow behavior, effects of geometry and working conditions of a gas-liquid cylindrical cyclone separator with a new structure are investigated by computational fluid dynamic and experiment. Gas liquid cylindrical cyclone separator is widely used in oil industry, refrigeration system because of its simple structure, high separating efficiency, little maintenance and no moving parts nor internal devices. In this work, a gas liquid cylindrical cyclone separator with new structure used before evaporator in refrigeration system can remove the vapor from the mixture and make evaporator compact by improving its heat exchange efficiency with the lower inlet quality. It also decreases evaporator pressure drop and reduces compressor work. The two pipes are placed symmetrically which makes each of them can be treated as inlet. It means when the fluids flow reverse, the separator performance will not be influence. Four samples with different geometry parameters are tested by experiment with different inlet quality (0.18-0.33), inlet mass flow rate (65-100kg/h). Compared with the experimental data, CFD simulation results show a good agreement. Eulerian multiphase model and Reynolds Stress Turbulence model are applied in the CFD simulation and obtained the inner flow field such as phase path lines, tangential velocity profiles and pressure and volume of fraction distribution contours. The separator body diameter (24, 36, 48mm) and inlet diameter (3.84, 4.8, 5.76mm) decide the maximum tangential velocity which results in the centrifugal force. The tangential velocity profiles are simulated and compared among different models. The higher tangential velocity makes higher quality of gas outlet but high pressure drop at the same time. Decreasing the inlet diameter increases quality of gas outlet pipe and pressure drop. High gas outlet quality is cost at high pressure drop. Increasing of separator diameter makes gas outlet quality increase first and then decrease but the pressure drop decreases all the way. The offset (0, 2.4, 3.6mm) of gas outlet is an insensitive factor which influences the quality and pressure drop little.
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