催设计方案范文

篇一：常大设计说明书例文

学号：

常 州 大 学 毕业设计（论文）

（ 届）

题 目 学 生 学 院 专业班级校内指导教师专业技术职务 校外指导老师 专业技术职务

椭球布料盘催化剂密相装填成套装置设计

摘要：国内外颗粒物料的装填，尤其是催化剂颗粒的装填工作，在其相关的领域越来越受到重视。本课题设计了一种利用颗粒物料在旋转的椭球型布料盘中通过离心力作用将颗粒物料从布料盘的开口中均匀的抛洒出去，从而达到物料均匀、密相装填效果的一种装置。设计按照JB/4735-1997《钢制焊接常压容器》进行设计、制造、检验和验收。装置的材料选用OCr18Ni9：工作压力为常压，工作温度为常温。装填的物料为Al2O3，物料密度为3600Kg/M3。设计说明书中进行了设备材料的选择，运转功率的计算，布料盘的强度校核和开口槽对数螺旋线的说明与应用，主轴的计算，齿轮和轴承的选取和校核，电机的选取及耳式支座的选取，绘制了设计装置的总装配图及相关零件图。本设计 装置主要应用于化工、石油化工和生物制药等行业的颗粒物料密相装填。 关键词： 密相装填； 布料盘； 设计；

I

the design of complete sets of equipment of catalyst dense loading

in ellipsoid Throwing particle machine

Abstract：Domestic and foreign particle materials loading，especially the catalysts backmix handloading work，in the relevant field get more and more attention. In order to achieve the desired effect with uniform material and dense loading,the subject designed a device which s- heds evenly granular matertals from the opening of Throwing particle machine by centrifugal force within rotational ellipsoid Throwing particle machine. Design according to JB/4735-19- 97 《Steel welded atmospheric pressure vessels》design、manufacture、inspection and ac- ceptance . Device of material selection is OCr18Ni9;working pressure is ordinary pressure, working temperature is Normal temperature. loading materials is Al2O3,material density is 3600Kg/M3.Design specifications have equipment material selection, calculating the power of operation , strength check of Throwing particle machine. Instructions and application of logarithmic spiral, axis calculation, selection and check of Gear and bearing, motor selection and the selection of ear type support. Mapped the general assembly drawings and related parts drawing. This design device is mainly used in chemical industry, petrochemical industry and biopharmaceutical industries.

Key words：dense loading ; Throwing particle machine ; design

II

目 录

摘要···········································································································································Ⅰ 目录···········································································································································Ⅲ 术语表·······································································································································Ⅳ 1 绪论·······································································································································1 1.1 概述····································································································································1 1.2 颗粒密相装填的研究的意义，国内外研究现状和发展趋势········································1 1.2.1 课题研究意义················································································································ 1 1.2.2 国内外的现状················································································································ 1 1.3 颗粒密相装填的研究目标和关键问题············································································5 1.3.1 研究目标························································································································ 5 1.3.2 解决关键问题················································································································ 5 1.4 颗粒密相填装作用和行业应用························································································5 2 设计参数的选取和设计思路·······························································································6 2.1 设计参数····························································································································6 2.2 设计思路····························································································································6 2.3 设计内容与具体步骤········································································································6 3 结构的设计和分析···············································································································7 3.1 总体结构设计····················································································································7 3.2 材料的选取························································································································7 3.3 布料盘计算或校核············································································································9 3.3.1 布料盘的选取和强度计算·····························································································9 3.3.2 布料盘上对数螺旋线开口槽························································································10 3.3.2.1 对数螺旋线的来源·····································································································10 3.3.2.2 对数螺旋线方程·········································································································10 3.3.2.3 对数螺旋线应用·········································································································12 3.3.2.4 总结·····························································································································13 3.3.3 布料盘开口槽宽度的设计····························································································14 3.4 电动机的选择···················································································································15 3.5 轴强度的计算、选材和校核···························································································16 3.5.1 选择轴材料····················································································································17 3.5.2 轴尺寸计算····················································································································18 3.6 齿轮的选取和校核················································(来自:www.zaidian.cOm 书 业网:催设计方案范文)···························································20 3.7 轴承的选取和校核···········································································································21 3.7.1 轴承的选取····················································································································21 3.7.2轴承进行校核·················································································································22

III

3.8 筒体与下料漏斗的计算···································································································23 3.8.1 筒体的计算····················································································································23 3.8.2 下料漏斗的计算············································································································24 3.9 料仓的支座·······················································································································25 3.10 轴承支座和流量调节插板的设计·················································································27 3.10.1 轴承支座······················································································································27 3.10.2 流量调节插板··············································································································28 3.11 螺栓，螺母的选取·········································································································29 3.12 键的选取·························································································································29 4 制造安装及技术要求··········································································································30 4.1 零部件的加工要求及检验·······························································································30 4.1.1 轴的加工要求及在各种转速下的平直度公差····························································30 4.1.2 布料盘的加工要求和动、静平衡的精度····································································30 4.1.3 布料盘筒体的制造要求和检验····················································································30 4.2 装置的试运转···················································································································30 4.3 加工与成形·······················································································································30 4.4 设备安装···························································································································31 5 结论······································································································································32 参考文献··································································································································34 致谢··········································································································································35

IV

篇二：沟通函-范文

关于××××项目定金支付的沟通函

_________________公司：

非常感谢贵司对我司的支持与信任！

前期由于本项目工期非常紧迫，为考虑到双方的长期友好合作关系，在未签订合同和支付定金的前提下，我司已应贵司要求，于201×年×月×日启动了本项目的设计工作。至今，具体项目工作情况如下：

1、×月×日-×月×日进行概念设计，于×月×日和×月×日进行了2次概念汇报，最终概念成果已得到贵司确认；

2、概念确认后，×月×日开始方案设计，×月×日向贵司提交了第一版方案；

3、根据贵司×月×日方案意见后进行调整，×月×日提交第二版方案，同时依×月×日会议意见，正在完善方案设计。

关于本项目的设计工作，我司一直采取积极响应的态度，并及时配合贵司进行设计调整和完善。在此，也希望贵司能予以相应理解，尽快帮忙安排合同定金的支付。我司于×月×日盖章寄出合同、定金发票、请款单，但贵司于×月×日才签订××××合同，和×月×日签订××××合同，而目前定金尚未支付，仍在贵司付款审批流程中。

为提升公司管理质量，给业主提供更好的质量服务，我司一直在实行ISO9000管理体系，其中项目管理规定：签订合同和收到定金后，方能启动项目。而在本项目中，为表合作诚意和考虑双方友好关系，通过特批流程同意在未签订合同前，已启动项目工作。虽然目前合同已签订，但定金尚未支付。因此，如果在×月×日前仍未收到定金，我司会按合同有关规定，延期提交设计成果或考虑暂停本项目的设计工作。待收到定金后，双方再商议重新启动的事宜。

为避免影响设计工期，和促进项目的顺利进行，在此恳请贵司能予以相应理解，尽快安排支付定金（RMB 万元）。

再次感谢贵司的信任和理解！顺祝商祺！

××××设计有限公司

二〇一×年×月×日

篇三：工程催款函

催款函

******物业管理有限公司 ：

现就贵司拖欠我司 《上海证券报配电系统计量》 改造工程款一事向贵司致函如下：

月日，贵司与我司签订了，双方约定，贵司曾于 2013 年 3 月 18 日支付了合同总价的70%预付款（178278.10元），余款按合同约定待施工完毕移交正式使用后个工作日付清。但从年月施工完毕至今，贵司便未再按约定支付分文，加上施工期间（经确认）增加的工程量（11988.00元），现累计已欠 88392.90 元，显已违约。

鉴于双方此前的合作关系较好，现特致函请贵司于 2013 年 9 月 30 日前将所欠款项支付我司。如贵司仍不能按期支付，我司将按有关规定向贵司追索欠款，甚至采取相关法律措施，届时，贵公司可能要承担诉讼而带来的更大损失。

此致

敬礼

*********工程有限公司

月日