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S114型碾輪式混砂機的設計(總裝及傳動機構(gòu)設計)
摘要：課題來源于大豐市春城鑄造機械廠。設計主要包括混砂機的傳動部分，齒輪傳動的設計，軸的設計與校核，混砂機總體結(jié)構(gòu)的設計分析與計算。其中S114型碾輪式混砂機減速機采用圓錐+二級漸開線圓柱齒輪軟齒面減速方式，不僅滿足了混砂機傳動裝置傳動比大和承載能力高的要求，而且使減速機具有結(jié)構(gòu)簡單，成本低，易于制造，安裝、調(diào)整要求低，運行維護方便，可靠性更強等特點。在混砂機設計中，還采取了以下措施，以保證其技術先進性和經(jīng)濟合理性:（1）采用矮刮板，加強對型砂的混合攪拌作用，并降低其功率消耗；（2）加大卸砂門面積，縮短卸砂時間；（3）采用輝綠巖鑄石做底盤護板，增加其使用壽命，減少刮板磨損,改堆焊WC（碳化鎢）為直接焊接硬質(zhì)合金刀片,針對強度不足,在刮板反面焊上加強筋以增加其強度,經(jīng)改進后,一副刮板可正常使用1年左右,刮砂干凈,結(jié)砂很少,負荷波動小。因此,設計具有較好的應用前景和實用價值。?
關鍵詞：輾輪式混砂機；傳動裝置；密封；潤滑；減速機
The Design of the S114 Roller Sand Mixer (the Design of the General Fitting and the Drive Gear)
Abstract: The subject stems from the machine-casting factory of Chuncheng of Dafeng City. The design mainly includes the drive system of the sand mixer, the gear, the design and check of the axle, the analyzing and calculation of the general fitting. The S114 type sand-mixture machine uses a 2-stage spiral gear box which not only satisfies to machine transmission and the requirement of bearing capacity, but also makes deceleration facility simple, economical, contributes to manufacture, makes requirement of installation and adjustment low, and makes reliability strong. In the machine design, the following measures have been adopted in order to guarantee technology advancement and economy reliability. Welded WC (tungsten carbide) is adopted instead of direct welding blade of hard alloy According to strength. The scraper reverse sides of welds are enforced in order to increase its strength. After improvement, a pair of scraper may be used for one year in common. It is clean to scrape sand, with few knot sand and little load fluctuation. So, the design will have better prospect of application and practical value.
Keywords： wheel rolling type sand mixer；transmission；sealing device；lubrication；Gearbox