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产品与设计                                                  文根保 等·变位蜗杆和变位蜗轮的克隆设计与计算


               [2]  文根保,文莉,史文 . 复杂注塑模具设计新方法及案例[M].               [3]  文根保,文莉,史文 . 复杂注塑模现代设计[M]. 北京 :金
                    北京 :化工出版社,2017.                                   盾出版社,2018.

                Clone design and calculation of modified worm and modified worm gear


                                                  Wen Genbao , Shi Wen , Wen Li 1
                                                                      2
                                                             1
                           (1.AVIC Aerospace Life-Support Industries Co. LTD., Xiangyang 441000, Hubei, China;
                                            2. University of Sydney, Sydney 2194, Australia)
                    Abstract: Because the large and small helical gears in the gear transmission pair adopt modified helical
                gears, the center distance after their meshing can not be the center distance of the standard gear. In this
                way, the meshing center distance between the worm and the worm gear is also a non-standard center
                distance. Therefore, the transmission of the worm and the worm gear pair must also adopt the modified worm
                and the modified worm gear, otherwise it cannot match the modified gear center distance. At the same
                time, for the worm and worm gear in the pair, in order to avoid undercutting of the worm gear, improve
                the bearing capacity of the worm, fit the center distance, improve the meshing performance and change
                the speed reduction ratio, the modified worm and modified worm gear should also be used. Whether the
                modification worm and modification worm gear adopt radial modification or height modification should be
                judged according to the type selection table of modification method. After determining the displacement
                type, the displacement coefficient can be calculated, and other parameters of the worm and worm gear
                can be well calculated.
                    Key words: worm; worm gear; displacement coefficient; end modulus; normal modulus
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                                  巴陵石化环氧树脂、环氧氯丙烷扩产项目获批
                         Baling Petrochemical's epoxy resin and epichlorohydrin expansion project was approved

                    中石化巴陵石油化工有限公司 2 万 t/ 年一步法固体树脂装置及环氧氯丙烷装置增产减排技术改造项目环评审
                批获同意。该项目总投资额达 1 563.92 万元。该审批信息于 2021 年 8 月 26 日被岳阳市生态环境局披露。
                    2 万 t/ 年一步法固体树脂装置以双酚 A、环氧氯丙烷、50%  NaOH 溶液等为主要原料,采用溶剂法工艺,通
                过此次对现有装置进行技术改造实现固体树脂产能由 2 万 t/ 年增加到 3 万 t/ 年,主要改造内容为 :新增一台预反
                应器及配套设施、增加投料量及优化投料方式、改用 50% 烧碱、提高产品包装速度等。
                    环氧氯丙烷装置以丙烯、氯气、3- 氯丙烯、石灰乳等为主要原料,采用环化工艺,通过此次对现有装置进
                行技术改造实现环氧氯丙烷产能由 2.7 万 t/ 年增加到 3.1 万 t/ 年,主要改造内容为 :通过更换环化反应混合器,
                在不增加氯醇反应工艺水量的前提下,加大氯丙烯和氯气投料量,二氯丙醇浓度由 3.9% 提升至 4.5~4.8%,并改
                变部分设备安装位置以降低反应系统压力以及优化环化下水降温等提高装置产能至 3.1 万 t
                                                                                              摘编自 “ 金融界 ”
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                2021     第   47 卷                                                                      ·57·
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