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机械毕业设计全套

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JX03-089@双螺杆挤出机毕业设计,机械毕业设计全套

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The latest developments in the twin-screw extruder Tian Qin Yuan 1, Cheng Ruilin 2, Liu Xiaofeng 3, Bi Chao 3 (1 Aeolus Tyre Co., Ltd., Henan Jiaozuo 454003; 2 Spark Machinery Co., Ltd. Xinxiang, Henan Xinxiang 453003; 3 Beijing University of Chemical Technology, Beijing 100029) Abstract: The twin-screw extruder extrusion system and the latest technological developments and scientific research as well as dynamic transmission twin-screw extruder were reviewed. Keywords: double-screw extruder; mandrel; screw; gear; Barrel CLC: TQ330.44 Groove depth ratio and torque coefficient is a measure of a twin screw extruder.Comprehensive index performance . China is currently the highest level of equipment.Groove depth ratio is 1.5 5 maximum torque coefficient is 11.3 . Germany.L eistritz company launched a groove depth ratio Do / Di is 1.66 ZSEMaxx Series twin-screw extruder . German companies push CoperionOut ZSK MC18 series groove depth ratio Do / Di twin screw 1.55Extruder , which reaches more than 18 Nm/cm3 torque coefficient . Country.Overall performance indicators in basic research outside the unit level close to its mechanical. Cut relevant . Domestic newly developed twin-screw extruder groove ntsdepth ratio. Do / Di is 1.8 , compared with the torque coefficient of 11.3 Nm/cm3. And P.Through Do / Di was 1.55 compared to a twin-screw extruder , newly developed machine.Model output can be increased by 20.5% .Development of an extrusion system. 1.1 Screw Geometry. New research shows 1 , and so were selected Amendment Act and the gap.Center distance correction method designed twin-screw extruder screw elements and rodents.Co- disk components, resulting gap uniform mixing for ensuring qualityUniform volume has an important role . Figure 1 and Figure 2 is a gap repair , etc.Screw elements and kneading disk space design element Dhamma distribution . 1.2 high load carrying capacity of screw mandrel Figures 3 and 4 compare the companys proposed Maxx L eistritz Series twin-screw extruder mandrel spline tooth and German standards D I N 5 4 8 0 involute spline tooth . Coming from the stress analysisSee, when used as shown in Figure 3 spline transfer torque memory only The drive screw rotates in the circumferential force F t, ordinary involute There is a key perpendicular to the rotational direction of the tangential force F r (seeFigure 4). When the screw when subjected to external shocks, Fr will likely beImportant cause damage to the screw element. Figures 5 and 6, respectively. nts1.3 pairs of channel thermostat Barrel Barrel temperature control accuracy and heating and cooling in the form of a cylinder closely.Off. Traditional electric heating and water cooling solution with heating and coolingRatio, dual temperature control accuracy of better heating and cooling solutions, temperature Adjust the sensitivity of the higher and lower energy consumption. 7 to 9 are each axisThe dual cylinder, radial and axial dual cylinder radial dual Channel barrel. The use of such barrel, extrusion machine work, when The actual barrel temperature is below the set temperature, the high temperature heat is introduced into.Heating oil barrel, the barrel when the actual temperature is higher than the set temperature, Then pass into the low-temperature thermal oil cooler tube. This design not only.Can improve the cooling efficiency of the heating cylinder, reducing energy consumption, andAnd can also increase the sensitivity of the barrel temperature, finishing temperature increase Degrees. In addition, it is worth noting that, to avoid the use of a heater intoOK barrel heating effectively prevent uneven heating of the barrel due to the manufacturing A bending of the extruder to improve the life. Two high-torque, low noise transmission system 2.1 pairs of transition shaft drive train Figure 10 is the latest development of Beijing University of Chemical ntsTechnology aDouble transition shaft drive train gear box. The length of the output shaftGear simultaneously drives the vertical axis on both sides of the transition gears, overShort axis crossing the output shaft drive gear. Makes high-load gear unit The total torque transmission torque teeth is 1/4, to improve the life of the gear box. 2.2 gear repair type In the new transmission, the use of parabolic method of teeth Wheel conduct modification 3. Gears meshing process can reduce stress overshoot.Strike, improve gear strength while reducing the noise level.Shown in Figure 11, to repair the tooth profile and the ideal type of stress before and after engagement Differences in stress situations engagement circumstances. The black curve is the ideal setLoad curve, the red curve is a standard involute gear-like forceState, the blue line is the stress state after repairing. 2.3 High load carrying capacity thrust bearing set Screw increase in production caused by the axial load increases, the thrustBearing put forward higher requirements 4. Dual-stage structure may haveValidity avoid excessive outer roller cage assembly problem too thin.3 summarizesIn this paper, the system separately from the extrusion screw geometry, mandrelDesign, barrel heating and cooling mode, the transmission gear train in cloth ntsAspects of home, repairing gear and thrust bearing groups such as double-screw extrusionDevelopment status of the machine has been systematically studied.References: 1 Bi Chao, Cao Lei, Li Ao, Jiang Bo. Parallel twin screw extruder screw geometry J plastic, 2011,40 (4): 81