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摘要
船用廢氣燃燒臂是一種用于排放輪船尾氣的一套裝備,其中燃燒臂為懸臂結(jié)構(gòu).在現(xiàn)有的燃燒臂過程中,一般采用船用吊機(jī)的設(shè)計(jì)方法所設(shè)計(jì)的結(jié)構(gòu)過于保守,使得結(jié)構(gòu)質(zhì)量偏大.燃燒臂結(jié)構(gòu)安全系數(shù)會(huì)過大,不僅導(dǎo)致材料浪費(fèi)和成本增加,而且還會(huì)對(duì)整個(gè)船體的穩(wěn)定性不利.回面燃燒臂結(jié)構(gòu)需要進(jìn)行專門的設(shè)計(jì).本文燃燒臂底座采用了專門用于回轉(zhuǎn)的回轉(zhuǎn)支承.
回轉(zhuǎn)支承裝置是近30年來發(fā)展起來的新型機(jī)器部件,它已從用子挖掘機(jī)和起重仇逐漸發(fā)展到用于其它機(jī)械。 回轉(zhuǎn)支承裝置近乎特大型的滾動(dòng)軸承。它將機(jī)器的上部和下部連接起來，用以支承上部的重量和工作負(fù)荷，并使上部能相對(duì)于下部旋轉(zhuǎn)。本文對(duì)燃燒臂底座進(jìn)行了彎曲強(qiáng)度,剪切強(qiáng)度及抗擠壓強(qiáng)度的校核.
而其燃燒臂上部桁架機(jī)構(gòu)的設(shè)計(jì)比一般船用吊機(jī)要輕巧得多,對(duì)此燃燒臂結(jié)構(gòu)需要進(jìn)行單獨(dú)的強(qiáng)度計(jì)算.
由于所要設(shè)計(jì)的燃燒臂回轉(zhuǎn)速度僅為1/6(r/min),因此,為了考慮其使用效率只使用一個(gè)圓錐-圓柱減速度器,故,在此次設(shè)計(jì)中選用了直接帶減速裝置的凸緣安裝型式電動(dòng)機(jī),此電動(dòng)機(jī)不僅功率和輸出轉(zhuǎn)矩能滿足要求,而且其輸出轉(zhuǎn)速僅為25n/min.
在回轉(zhuǎn)速度低,功率大的燃燒臂裝置中,所要求的減速器軸需要很高的強(qiáng)度,因此通過參考一些比較權(quán)威的機(jī)械設(shè)計(jì)手冊(cè)之后,再通過強(qiáng)度校核,選用減速器的軸材料為20CrMn.
關(guān)鍵詞：回轉(zhuǎn)支承，圓錐-圓柱減速度器，
Abstract
Marine from a burning arm for the tail gas emissions set of vessels and equipment, including combustion for the cantilever arm structure. Arm of the existing combustion process, the general marine crane designed by the design of the structure was too conservative, making the quality of the structure Too large. Combustion arm structural safety factor would be too large, not only lead to waste and material cost increases, but also the stability of the entire hull negative. Back-burner arm of the need for specialized design. Combustion arm base paper used a special use Rotary in the rotary bearing.
Rotary support device is nearly 30 years ago to develop a new type of machine components, it has been used excavator and the lifting of hatred to the progressive development of other machinery for. Rotary supporting device near the large rolling bearings. The machine will link the upper and lower to the upper bearing the weight and work load, and the upper to the lower part of the rotation. In this paper, the base of a burning arm bending strength, shear strength and the strength of anti-extrusion check. Combustion arm of the Department and its agencies truss design than the general marine hanging confidential lightweight much, this burning need for a separate arm of the Strength calculation.
Because the design of the combustion rotary arm speed is only 1 / 6 (r / min), therefore, in order to consider only the use of its efficiency in the use of a cone - cylindrical cut speed, so that in this design selected directly with the slowdown in device Flange installation type motor, the motor not only power and torque output to meet demand, but its output speed is only 25 n / min.
Rotary in the low-speed, large power plant burning arm, the required reducer axis need a high intensity, some of the more authoritative reference by the mechanical design manual, to check through strength, the choice of reducer shaft material for 20 CrMn .
Key words: slewing bearings, cone - cylindrical cut speed,