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动手实践: 实验报导
( 其实这帖早应该在22年就发出来的,因为种种因素迟迟没有发帖。 入坑不久,正值中考结束的暑假,故有时间精力来研究金属机。 金属机壳体使用的是6061铝合金,全长200mm,内直径34mm,外直径38mm,装药长度160mm。 喷管使用拉瓦尔喷管,304钢。 先使用爱好者们制作的计算器算得发动机工作时的平均压强,峰值压强等数据: 在将压强数据放在科创站内的计算器中计...
《电火花加工在液体火箭发动机喷注器
制造
中的应用》
富二代创始人
5年4个月前
发表于
喷气推进
科创基金
此项目是和地震带上的人共同进行的项目。电火花加工是指在一定的介质中,通过工具电极和工件电极之间的脉冲放电的电蚀作用,对工件进行加工的方法。电火花加工是20世纪40年代开始研究并逐步应用于生产的一种利用电、热能进行加工的方法。——摘自百度百科《电火花加工》电火花加工的原理很简单,玩过ZVS或电子爱好者都了解:如果我们有根电极,相互不接触,在两端加上直流高压电,当电压足够高的时候,就会击穿电极间的空气...
数字集成电路设计:从VLSI体系结构到CMOS
制造
Zhang_TTL
2年5个月前
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[分享]编程天才+业余液体火箭
制造
者——John Carmack
georgemonster
17年0个月前
发表于
喷气推进
id Software的John Carmack或许很多人并不知道,但是我想人人都应知道CS,Quake,Half-Life。Doom也许你们也知道,DOOM3在2001年刚放出画面时竟瘫痪了世界上绝大多数个人电脑。这些游戏的引擎都是John Carmack一手写的(CS,half-life(不是hl2)用的是quake引擎)。事实上,他可以成为3d游戏之父。当然,这带给他大量的财富。他拥有20多...
小型液氧电动离心泵设计、
制造
和测试
AsyncMaster
2年5个月前
发表于
喷气推进
动手实践: 实验报导
在之前的挤压式液氧乙醇发动机试车成功后,逐渐将精力集中到泵压式发动机上,决定先从难度较高的液氧泵开始做起。泵的蜗壳采用铝合金3D打印,叶轮和诱导轮采用不锈钢3D打印,在CFTurbo中设计后导入到CFD中验算。叶轮径向力平衡采用背叶片+角接触轴承。叶轮前密封采用一级PTFE wear ring。动密封系统采用两级石墨浮环密封配合氮气吹除。电机采用4092航模电机加装编码器,使用阿卡林伺服EVO闭环...
讨论用市场上的配件
制造
H3电池的可行性
MTL
11年5个月前
发表于
电子技术
现在氚管在淘宝上卖的不少,算是一种最亲民的*动力产品了,自然想到能不能用它造一个电池呢?冥灵的廉价大型氚管让我觉得可能可以试试, 于是…… 先计算下衰变功率: 采用英文维基的数据:每次衰变电子平均能量5.7KeV=5.7*(1.6*10^-19J*1000)=9.12*10^-16J 维基上的氚管5.1mm*150mm,1.8Cu,冥灵的氚管直径可看做5.1,长度100,所以认为活度1.2Cu 1...
简易电磁铁+NE555延迟开伞装置的
制造
与发射验证
WJT
1年4个月前
发表于
喷气推进
电子技术
动手实践: 实验报导
去年的作品了,现在才放出来[手动捂脸]……当时在某宝上看到了这个东西……这就是我们的主角。该电磁铁按下后自锁,通电后顶部弹出(有一点点像断路器)。弹簧弹力很大,将其压缩至少需要几十N的力,足够将插紧在箭身上的头锥弹出。该电磁铁行程较短,仅6mm。在不考虑使用牵引伞的前提下,仅能支持弹出小面积的降落伞。不过对一般小型业余火箭,使用小降落伞时,火箭下落速度大、受风影响小,落点距发射点近,有不易遗失的优...
RMR
制造
。
任某人
13年1个月前
发表于
电子技术
过两天去滑雪。。想到进山了以后手机没电了就杯具了。。遂决定造一只AAA电池带的手机充电器。。可充电镍氢AAA可以白天滑完雪回宾馆充电。。第二天带上山就不会杯具了~34063升压至5.4v稳压到5.1v输出。由于7805最小工作电压7v就换成4只1w稳压管。加起来4w。实测输出短路700mA。3.5w稳压管正好应付得住。自认为布局还算比较紧凑= =带负载实测4.5v还算正常。。
(转载)一种过氧化氢氢化催化剂
制造
工艺
LS
5年10个月前
发表于
喷气推进
声明:非原创,转载于XXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Search/Detail?ANE=9GFE4DBA3ACA9HCG9IEE5CDA2BBA9GGD6DAA9CID9HFE9HAC一种用于制备H2O2的氢化催化剂的制备方法技术领域本发明属于催化反应工程领域,具体涉及一种蒽醌法制备H2O2用高性能Pd-Zr-Zn/γ-Al2O3氢化催化剂的制备方法。背景技术H2O2广...
RNX火箭发动机的设计,
制造
,试车与发射
154454496
6年4个月前
发表于
喷气推进
先发出贴去,把这坑挖下。发动机首次试车已经完成,未达到预期,优化中镇楼图 设计目标:外径20mm,比冲50秒,工作压力两兆帕燃料柱参数计算:借用@A.C 同志的图 可见2Mpa时,喷燃比约为480取药柱外径16mm,喷吼直径4mm,算得药柱长度120mm喷管计算取压力1Mpa,参数如下图。由于塑料发动机加工困难,就不做收敛段了。一般发动机,算出来的参数,到我手里至少得折半😂 😂 加工不用多说,...
[转帖]RecycleBot将废弃牛奶壶
制造
成3D打印塑料丝材料
wall哥
11年10个月前
发表于
机械与工具
目前DIY已经从最开始的家庭爱好者逐渐演变到试验室:DIY可以节省大量的金钱而且可以得到自己心仪的东西。来自密歇根理工大学的皮尔斯(Joshua Pearce)从试验室设备甚至剃须刀都使用开源软件和3D打印机自己制作,他称,通过3D打印机打印这些东西至少可以节省几千美元。 “但是丝材的成本价格一直是阻碍3D打印普及的一个重要障碍”,皮尔斯说“虽然使用3D打印机和开源程序能够节省大量的成本但是对于一...
为什么《固体火箭设计与
制造
》这本书不全啊?
xxjxys
10年0个月前
发表于
喷气推进
很抱歉,当了一次伸手党,不知道是不是科新社还没编完,但好久了,看着目录很期待下面的内容,可是这么久了也没有动静,能弱弱的问一下大神们,到底是个什么情况啊???
偶然看到一个
制造
HX品的式子,[新共享了文献]
hexogen
13年4个月前
发表于
化学
那个溴后面是1? 3Br1 ? 我没看错吧, 成本有点不太现实 ,没多少建设性。但很有意思,能拿出来开心娱乐下.... 新共享了文献,也有不少内容的 赏点分吧,版主?
首次测试Crm2金属发动机_100gkndx
制造
的超级力量
3ha510
15年2个月前
发表于
喷气推进
首先是视频:点击此处查看视频这次用的15cm的铸铁管,总共100g(实际90克左右)质的KNDX,两端分别有两个6cm深5mm的圆形内孔,直径24mm,喷管5mm。其实是爆裂了,在螺纹那里爆裂了,螺纹太脆弱,导致喷口整个儿飞出去了(点火后10秒落地,在水泥地弹起来大约有一人高),可以当炮用了……100g燃料半秒不到就变成空管子了!!!上帝哦[s:247]震撼的声音啊。旁边防护用的PVC管被炸得粉碎...
发现了
制造
全息初音的详细教程包括源视频制作
极度深寒
12年6个月前
发表于
极客DIY
严肃内容: 教程/课程
点击此处查看视频
世界上最强悍的等离子火焰,老外
制造
,大家来看看
йvdanger⊥
15年2个月前
发表于
高电压技术
请问谁有固体火箭设计与
制造
资料的,科新社出版的
zhj614321916
10年4个月前
发表于
喷气推进
我的资料到发动机哪里就没有了,恳求后面的部分资料。新手求
想用KNDX
制造
火箭发动机的请进.应该对你有帮助.
usercim
16年0个月前
发表于
喷气推进
KNDX已经是一种比较成熟的业余火箭燃料了.他的理论比冲在160左右(印象里是).实际能使KNDX发挥到100就很N了,当然和高级的NEPE推进剂(比冲220左右)没法比,不过KNDX的性价比,实用性,就针对咱们业余爱好者爱说已经远远足够了.下面是我搜集到的关于KNDX的基本资料.理论比冲 164s最大可测量比冲 137s金属发动机可达到 100s以上常压下燃烧速度 0.2cm/s自燃温度 300...
询问如何
制造
大功率音频电路,并能发出指定频率
大仙
15年11个月前
发表于
电子技术
RT
人人都可
制造
机器人?
mass_lynnxy
17年9个月前
发表于
极客DIY
谷歌、英特尔和微软日前正在进行一项投资,该项投资可能会变成一场机器人的入侵。来自这三家技术公司的资金已经能让卡内基·梅隆大学的研究人员创建一系列连接到互联网的机器人,采用现成的组件,几乎任何人都可以建立这种机器人。 作为远程呈现机器人套件(TeRK)的组成部分,去年夏天卡内基·梅隆大学机器人学院和位于德克萨斯州奥斯汀的Charmed Labs的成果被公布于众:机器人技术的助理教授Illah Nou...
[强人
制造
]纪念尼古拉.特斯拉 - 一起来做个磁暴线圈吧
苯萘蒽菲
15年7个月前
发表于
高电压技术
我转载的。 有条件的人并且品行良好极其注重安全的人可以小规模的试试;极其鄙视没条件又没有责任感的人随意尝试。XXXXXXXXXXXXXXXXXXXXX/articles/XXXXXXXXm
强烈期盼大虾们改造电磁枪
制造
水电爆炸,我等着看效果
dctyu
15年10个月前
发表于
电磁炮
这是来自XXXXXXXXXXXXXXXXXXXXXXXX/t/12944第4楼的话题。把水放在平行板电容器中间。用巨大的瞬间电压能够使容器中的水“爆炸”。这个理论没有什么数据。各位不妨就用手头的设备一试。要求电压从零加速到很高用得时间越短越好。缓慢的加电压到很高是没有用的。补充说明水和极板间有绝缘层,用以隔绝直流电流。在搜索引擎里搜索“水电爆炸”也只有寥寥几句新闻报道。用英文倒是总能看到一个德国M...
机械工程对于发明的重要性——希望解决“锥形钢笔尖”的
制造
工艺问题
1211
19年0个月前
发表于
电子技术
吴文倬同志在论坛“成果展板”区发的“锥形钢笔尖”设计,具有新颖性,但是由于是概念型发明,实物是什么样子,工艺上如何设计和实现,还没有成形。请大家出出主意,设想一个结构以及它的工艺流程——就当实际演练吧。 XXXXXXXXXXXXXXXXXXXXXXXX/XXXXXXXXXXp?boardID=33&ID=375&page=1
(中期报告)大总冲高能固体火箭发动机的内弹道设计方法研究与设计、
制造
、试车
山氰水溴
4年5个月前
发表于
科创基金
在前期完成发动机内弹道设计和发动机力学设计的基础上。我们使用基金第一期拨款购买了部分材料并完成了发动机加工。目前购买材料有AP、环氧树脂、发动机管材、酚醛布棒、石墨棒、水压泵、震动电机、螺丝钻头丝锥。发动机加工(附)项目资金使用记录2020/6/2 +2943 (资金到账)余额29432020/6/4 -258 (水压泵) -130 (燃料树脂)余额25552020/6/9 ...
Aeromechanics
uid: 84621
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机友 笔友
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最后活动:
1年4个月前
机械
制造
【国内的大型激光3D打印】航空高性能大型复杂整体构件激光直接
制造
技术研究进展(北
bg2bhc
12年2个月前
发表于
机械与工具
视频在这里 XXXXXXXXXXXXXXXXXXXXXXX/XXXXXXXXXXXtion?docid=12916听上去很NB啊~振奋
请问
制造
一个人20CM高的泰斯拉线圈大概造价多少元?
black
16年10个月前
发表于
电子技术
橙子
uid: 41314
实习会员
笔友
0
文章
3
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0
学术分
注册时间:2013/8/6 23:37:31
最后活动:
6年11个月前
从事
制造
业
高山仰止
uid: 82774
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