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S114型碾輪式混砂機(jī)的設(shè)計(jì)(總裝及傳動(dòng)機(jī)構(gòu)設(shè)計(jì))
摘要：課題來(lái)源于大豐市春城鑄造機(jī)械廠。設(shè)計(jì)主要包括混砂機(jī)的傳動(dòng)部分，齒輪傳動(dòng)的設(shè)計(jì)，軸的設(shè)計(jì)與校核，混砂機(jī)總體結(jié)構(gòu)的設(shè)計(jì)分析與計(jì)算。其中S114型碾輪式混砂機(jī)減速機(jī)采用圓錐+二級(jí)漸開(kāi)線(xiàn)圓柱齒輪軟齒面減速方式，不僅滿(mǎn)足了混砂機(jī)傳動(dòng)裝置傳動(dòng)比大和承載能力高的要求，而且使減速機(jī)具有結(jié)構(gòu)簡(jiǎn)單，成本低，易于制造，安裝、調(diào)整要求低，運(yùn)行維護(hù)方便，可靠性更強(qiáng)等特點(diǎn)。在混砂機(jī)設(shè)計(jì)中，還采取了以下措施，以保證其技術(shù)先進(jìn)性和經(jīng)濟(jì)合理性:（1）采用矮刮板，加強(qiáng)對(duì)型砂的混合攪拌作用，并降低其功率消耗；（2）加大卸砂門(mén)面積，縮短卸砂時(shí)間；（3）采用輝綠巖鑄石做底盤(pán)護(hù)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(duì)強(qiáng)度不足,在刮板反面焊上加強(qiáng)筋以增加其強(qiáng)度,經(jīng)改進(jìn)后,一副刮板可正常使用1年左右,刮砂干凈,結(jié)砂很少,負(fù)荷波動(dòng)小。因此,設(shè)計(jì)具有較好的應(yīng)用前景和實(shí)用價(jià)值。?
關(guān)鍵詞：輾輪式混砂機(jī)；傳動(dòng)裝置；密封；潤(rùn)滑；減速機(jī)
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