HB5965-2002枞树形榫头、榫槽尺寸标注与技术要求.pdf 22页

'L日中华人民共和国航空行业标准HB5965一2002FL2840代替HB5965一1986极树形样头、桦槽尺寸标注与技术要求Dimensioningandtechnicalrequirementsforthefir-treeconnection2002一11一20发布2003一02一01实施国防科学技术工业委员会发布 HB5965一2002目次前言··························，·························，，··········，·············，····································⋯⋯n1范围··，··························································，··········。，········································⋯⋯12规范性引用文件············，···················，··········，·······‘·，..................................·，··⋯⋯13术语和定义、符号··········，············，···········，·····································，······················一13.1术语，，··，·················，·。·················，····························，···········，··········，············，···⋯⋯13.2符号·····...............................................................................................................24基准选定······························，···········································································⋯⋯24.1基准面A的选定····，·，，········，，·············，，····，···········-·，，，，·······，···········，，···一24.2基准面B的选定······················································...................................，·····⋯⋯25尺寸标注·····················，········，············，·········，·，················，··································⋯⋯45.1桦头、桦槽的尺寸标注·，······················································，·····················，····⋯⋯45.2桦头、桦槽的公差·······························································，···············，··········⋯⋯45.3在桦头(桦槽)的设计图样中给出量棒距尺寸·······，···········，···········，··········，··············⋯⋯45.4设计图样中量棒距尺寸·······························，····································，···········，·，.·⋯⋯46量棒距尺寸分组······················，······················，·················································⋯⋯56.1量棒距尺寸分组原则·····，··‘，·，····。。。‘·，，，·······‘，，，，，·······，，，，·，········，，·········，·······，，··，·⋯56.2量棒距尺寸分组示例·························。··············································，···········...···⋯⋯67桦头(棒槽)的技术条件··············································，·，···········，···········，··············.·⋯⋯87.1平行度··········，·····‘···············，，，···········，··············，··‘···············，···········，···············⋯⋯87.2错移·······························，········································，···································一87.3桦齿轮廓度··············，，····················。·，，···························································，··⋯⋯87.4桦齿直线度··························，·························································，····⋯⋯，，二，⋯⋯97.5量棒距偏差差值········，·，··········，·························································.·.··⋯⋯，.··⋯⋯98桦头(榨槽)表面粗糙度·.....................·，，······‘···，··········.................................·，⋯⋯99极树形桦头、桦槽的基本尺寸和几何参数·.......................................................................910极树形桦头、榨槽的设计图样标注························，······················，·····················，·····⋯⋯911桦齿强度估算方法···················，··································································⋯⋯9附录A(规范性附录)极树形桦头、桦槽的基本尺寸和几何参数·····································一10A.i极树形桦头、樟槽的齿距、楔角、齿形角和压力角见表A.1.，······。·····，·········，，·，····1··，··⋯⋯10A.2极树形桦头、棒槽的各种圆弧尺寸见表A.2o................................········，·········，，····一10A.3极树形棒头、桦槽的几何参数计算:····································，····，，·························⋯⋯10附录B(资料性附录)极树形桦头、桦槽设计图样标注示例···········································，·⋯13附录C(资料性附录)桦齿连接强度估算············，·············，·······································⋯⋯15标准分享网www.bzfxw.com免费下载 HB5965一2002月U吕对HB5965-86进行修订时，综合考虑了国内有关厂所的实际情况和对HB5965一86的执行情况，并参考了国外有关标准。主要的修改和补充内容如下:a)修改了节线定义，明确了节线的具体位置;b)增加了量棒距分组规则;c)对平行度进行了更全面的规定;d)对量棒距尺寸偏差的差值进行了限制;e)增加了桦齿直线度;f)增加了附录A，并在其中规定了榨齿基本几何参数和计算方法;9)增加了附录C，并在其中给出了桦齿强度估算方法。本标准自实施之日起，同时代替HB5965-860本标准附录A为规范性附录。.本标准附录B为资料性附录。本标准附录C为资料性附录。本标准由中国航空工业第一集团公司和第二集团公司提出。本标准由中国航空综合技术研究所归口。本标准起草单位:中国燃气涡轮研究院、中国航空综合技术研究所。本标准主要起草人:江和甫、黄文周、肖世斌、武文华、黄业付、陈养惠、高庆。本标准首次发布:1986年。 HB5965一2002极树形樟头、樟槽尺寸标注与技术要求范围本标准规定了航空发动机工作叶片极树形桦头和轮盘极树形桦槽基本结构要素的有关术语、尺寸标注，以及与桦头、桦槽几何形状有关的技术要求。本标准适用于航空发动机工作叶片极树形桦头和轮盘极树形棒槽。2规范性引用文件下列规范性文件中的有关条文通过本标准的引用而成为本标准的条文。下列注明日期或版次的引用文件，其后的任何修改单或修订版均不适用于本标准，但提倡使用本标准的各方探讨使用其最新版本的可能性。JB3326量针3术语和定义、符号下列术语和定义、符号适用于本标准。3.1术语典型的极树形桦头桦槽连接见图1,极树形桦槽见图2,极树形桦头见图3。构成桦头的主要结构参数见图4a，构成桦槽的主要结构参数见图4bo3.1.1样槽groove轮盘上安装叶片的槽。3.1.2样头bladeroot叶片上与桦槽连接的部分。3.1.3极树形禅头(样槽)fir-treebladeroot(fir-typegroove)具有两对或两对以上桦齿且其截面形状为极树形的桦头(桦槽)。3.1.4禅齿工作面loadflank桦头(桦槽)桦齿在工作时的承力面。3.1.5节线pitchline确定桦齿位置和几何要素的直线，在节线上齿厚和齿槽宽的基本尺寸相等。3.1.6节点node节线与桦齿工作面的交点。3.1.7节点母线nodegenerator在一个桦齿工作面上节点的集合。t标准分享网www.bzfxw.com免费下载 HB5965一20023.1.8楔角wedgedangle樟头(桦槽)两条节线之间的夹角。3.1.9节距pitch同一对桦齿上两个节点之间的距离。3.1.10齿距teethdistance同侧相邻两齿节点之间的距离。3.1.11齿高toothheight在垂直于节线的方向上，桦齿齿顶至齿根的距离。3.1.12齿顶高addendum桦齿齿顶至节线的距离。3.1.13齿厚toothridgethickness在节线上桦齿的厚度。3.1.14齿槽宽toothgroovewidth在节线上桦齿槽的宽度。3.1.15压力角angleofbite在节点处，棒齿工作面与垂直于节线的直线之间的夹角。3.1.16齿形角teethangle桦齿工作面与非工作面之间的夹角。3.2符号a—楔角A—节距t—齿距H—齿高h—齿顶高m—齿厚nee—齿槽宽R—压力角r—齿形角4基准选定4.1基准面A的选定基准A是包含第一对桦齿工作面上两条节点母线的平面。4.2基准面B的选定基准B是楔角平分线所形成的平面(桦头、桦槽的对称平面)且与基准A垂直(见图5)0 HB5965一2002牌头拢一击二告三击困击五音丫汉凭外侧等心江狱图1样头、禅槽连接图2禅槽图3禅头3标准分享网www.bzfxw.com免费下载 HB5965一2002b概图4结构参数a样头图5基准选定5尺寸标注5.1禅头、桦槽的尺寸标注桦头尺寸标注见图6,桦槽尺寸标注见图70图6、图7以齿顶、齿根为圆弧结构形式的五对桦齿的桦头(桦槽)为例给出了极树形桦头(桦槽)的基本标注。对于齿顶、齿根为平面或其它局部结构形式不同的桦头(桦槽)，除有关尺寸外，其余尺寸仍按本图示例标注。52样头、桦槽的公差在桦头(桦槽)设计图样中所注出的桦齿工作面轮廓度公差8g、非工作面轮廓度公差8,、底部轮廓度公差8d和齿根圆弧R，的公差、齿顶圆弧Rd的公差一起，构成完整的桦头(桦槽)轮廓公差带(见图8)。对于齿顶为平面的樟头(桦槽)，设计图样中所注出的桦齿工作面轮廓度公差8g、非工作面轮廓度公差6,、齿顶高h的公差和齿根圆弧R。的公差一起，构成完整的桦头(桦槽)轮廓公差带(见图9)0实际的桦头(棒槽)截面形状应在轮廓公差带范围内。5.3在样头(掸槽)的设计图样中给出量棒距尺寸在确信桦头(桦槽)轮廓形状合格的情况下，可根据量棒距尺寸验收产品。量棒距的尺寸公差是根据桦头(桦槽)的形状公差和有关尺寸的尺寸公差换算而得到的。5.4设计图样中垦棒距尺寸在桦头(棒槽)的设计图样中量棒距尺寸至少给出两个。在结构允许的条件下，两对量棒的位置应选在最大节距和最小节距处。计算量棒理论直径时应使量棒与桦齿工作面相切于节点母线上，量棒真实直径的数值按JB3326就 HB5965一2002图6禅头尺寸标注近选取。6最棒距尺寸分组6.1量棒距尺寸分组原则实际生产过程中，在保证摔头与桦槽连接精度的前提下，为了提高桦槽拉刀的寿命，允许对量棒距尺寸进行分组。分组原则是:第一组为原始设计值，每一组的基本尺寸是由上一组的基本尺寸减去量棒距标准分享网www.bzfxw.com免费下载 HB5965一2002尺寸公差而得到的，公差和极限偏差保持不变。6.2f棒距尺寸分组示例对于a=30渭=15,y=55,t=1.8mm，量棒距尺寸公差为士0.039的榨槽，将其量棒距尺寸分为三组，见表to图7掸槽尺寸标注表1禅槽且棒距分组示例单位为毫米组别A,,士0.03915.00524.92734.849 HB5965一2002仅最后一对齿用a掉头b跳图s轮廓公差代带与样槽量棒距尺寸分组相对应，桦头量棒距尺寸分组示例见表20棒头(桦槽)加工完毕后，必须标明组别标号。组别标号相同的樵头和桦槽才可用于连接。轰2撞头母桂距分组示例单位为毫米组别Au士0.03916.54726.46936.391标准分享网www.bzfxw.com免费下载 HB5965一20027样头(桦槽)的技术条件7.，平行度同一对量棒的轴线在基准平面A方向上，在l00mm长度上的平行度公差不大于0.06mm。同一对量棒的轴线在基准平面B方向上，在l00mm长度上的平行度公差不大于0.05mm(见图10)aa搏头图9平面齿顶禅齿轮廓公差带⑧入长91a禅头b株槽图10错移示意图7.2错移是指同一对量棒在桦头(棒槽)轴向长度中点处，在对称平面(基准B)方向上的相互最大允许错移量，即量棒至基准平面A的最大距离差(见图10)0错移量。不大于0.02mmo7.3禅齿轮廓度桦齿工作面上的轮廓度公差a:不大于0.02mm，非工作面上的轮廓度公差a不大于0.03mm,桦槽第一齿非工作面轮廓度公差么，和桦头最后一齿非工作面轮廓度公差么‘不大于0.04n,m，底部轮廓度公差8A不大于0.05mmo HB5965一20027.4禅齿直线度实际桦齿工作面上节点母线的直线度，称为樟齿直线度。在棒头(桦槽)全长上，桦齿直线度公差不大于O.Olmmo7.5且棒距偏差差值任意两对桦齿的量棒距尺寸偏差的差值不大于0.03mmo上述五项技术条件以及由设计人员选用的公差值应在设计图样中标出。8桦头(禅槽)表面粗糙度桦头(桦槽)的机械加工表面粗糙度按表3选定，选定后的表面粗糙度应在设计图样中标出。表3样头和禅槽表面粗糙度单位为微米名称部位表面粗糙度(Ra值)不大于榨头底面3.2桦头禅齿工作面0.8禅齿非工作面0.8桦齿工作面1.6桦槽禅齿非工作面1.69极树形桦头、禅槽的基本尺寸和几何参数极树形棒头、样槽的基本尺寸和几何参数按附录A的规定。10极树形掸头、禅槽的设计图样标注极树形桦头、樟槽的设计图样标注示例参见附录Bo11樟齿强度估算方法棒齿强度估算方法参见附录C标准分享网www.bzfxw.com免费下载 HB5965一2002附录A(规范性附录)极树形桦头、禅槽的基本尺寸和几何参数A.1极树形桦头、桦槽的齿距、楔角、齿形角和压力角见表A.1.表A.1极树形桦头、棒槽基本尺寸齿距t,m楔角a齿形角Y压力角R1.8;2.0;2.2;2.4;2.6;2.8;3.0;3.2;3.5200:;:;;:550巧o30060"3001.8;2.0;2.2;2.4;2.6;2.8;3.0;3.2;3.5;4.0;4.5;6502505.2;6.0550150:::A.2极树形桦头、桦槽的各种圆弧尺寸见表A.2oA.3极树形桦头、桦槽的几何参数计算:以五对齿的桦头、桦槽连接为例进行计算说明。假设轮盘桦槽第五对齿齿顶之间的距离等于T,桦头、桦槽非工作面在平行于基准A的方向上间隙为C(见图A.1)oA.3.1按下列公式计算棒槽节距A的尺寸:tcos(y一R)A=T一2(5s;in(Yyi2)cos(Y二一，一/2)一!+singcos(召+a左)+8sin(a/2)，·⋯⋯(A.1)Ai2一A;，一2tsin号····一(A.2)A;3=入1一“tsin号一(A.3)A;,=A;,一“tsin号Ai，一A;，一“tsin号·····⋯⋯(A.5)A.3.2根据下列公式求出摔头节距尺寸Ar}.M}A,joj:=Aro"4*一2C，⋯⋯(A.6)式中:2C=0.05t在设计过程中，允许对C值进行调整。A.3.3量棒直径的理论尺寸由下式确定:tCos(y一P)tg(Y2)⋯⋯(A.7)sing然后按JB3326选取最接近于d的数值作为量棒真实直径dl，并按下列公式计算出榨槽和樟头的量棒距尺寸A,=。to BB5965一2002a)对于桦槽A认=A;}+tODS(Y-一)COs(+a/2)cos(a+a/2一Y/2)dl···⋯⋯(A.8)sin了a主一一sinY2)一b)对于桦头tcos(Y一a甩)，，cos(口+a尼一Y甩)Al，=A,}—十ai一一爪石双于厕—+dl·⋯(A.9)表A.2极树形禅头、禅槽圆弧尺寸参数单位为毫米齿距tR,R,R,R,.R,a1.80.300.300.300.500.502.00.350.350.350.700.702.20.350.350.350.700.702.40.400.400.400.800.802.60.450.450.450.900.902.80.450.450.450.900.90+0.05003.00.500.500.501.001.000一0.05一0.053.20.550.550.551.101.103.50.600.600.601.201.204.00.700.700.701.401.404.50.750.750.751.501.505.20.850.850.851.701.706.01.001.001.002.002.00供参考11标准分享网www.bzfxw.com免费下载 HB5965一2002图A.l禅齿几何参数 HB5965一2002附录B《资料性附录)极树形桦头、桦槽设计图样标注示例B.1标注示例图B.1和图B.2中给出的是配对的桦头、桦槽，它们具有相同的齿距。B.2标注示例图B.1和图B.2中给出的尺寸和公差，供设计人员设计参考。B.3示例中的量棒距尺寸公差是根据桦齿轮廓度公差换算得来的。图B.1禅头标注示例标准分享网www.bzfxw.com免费下载 HB5965一2002全部沙图B.2桦槽标注示例 HB5965一2002附录C(资料性附录}禅齿连接强度估算C.1用挤压应力、弯曲应力和剪切应力表征的桦齿强度会随角度二月.Y的变化而变化。C.2桦齿厚度等于lmm时(t=2mm,Rd=Rg=0.35mm),桦齿单位长度上由单位力所引起的各种应力系数见图C.1、图C.2、图C.3和图C.4o2cos(y一R)K={[(C.1)sinY一。.7ctgz一黔]cosa‘一cos(y一Q+a2)KZ=(C.2)[2cos(Y一f3)/sin)一0.35ctg(y2)一0.05/cosafsinyK,=[3/K,cosy+2.lctg(Q2一450)一3ksiny]+0.3鱼oso..⋯·····一(C.3)一—-—}-一kcosak_[2cos(Y二)/siny+0.35ctg(f2.一450)一0.35ctg(y2)]siny....⋯⋯(C.4)cos(y一Q式中:K,—挤压应力系数;K2-弯曲应力系数;K3-剪切应力系数。C.3桦齿的实际应力可由下列公式估算:a}=K,P,l((C.5)‘·=K,P,l(C.6)(C.7)r=K,PA式中:a=-~挤压应力，MPa;。。—弯曲应力，MPa;:—剪切应力，MPa;尸」—作用在一个桦齿上的离心力，N;b—桦齿长度，mm;m—齿厚，~。标准分享网www.bzfxw.com免费下载 HB5965一2002KI儿y=45“_K3。一只只”______肠y=65·二二‘三二\一、lI一}//产，//一产产一一碑一叹丫一入一_--.-气一\一l、Kz、\\、//产一一}、’、V{//~了l-__，一护l、/丫~~一万丫，一户}__二、一、/’一{一尸.尸2子-二任一分=叮二夕衬\/’厂之一二\、少二--"I一~、~~~~~、、/一一.一尸，。/l一乏_/二之:之~~。./l~厂一二二_二纷一手少二:二{二二孟之，二乡-上一，J卜丰l关_{一一卜一陈立王‘之卜--一公一{}二-之二一}/，二日~~.~//"K3图C.1楔角a=200时的各种应力系数 HB5965一2002KI儿K335,r-一d5‘一一一__7一55。---一____1rr“-F5’—一_-、\\Ki\一、湖、\厂/}、、//}\\//}\了/}\、//‘7}户洲尹一一产尸\/十/厂一//户/{广//了\{、洲一之-一丁//一\少_//~、、~__二平二、~~~~l卜~~，.~~叫~一、、~~~、、、K3~、、一_/Kz洲石I一~~~~，~~~.~~二二二一少为李之扮一了_了_已二三二三注二r~~~~一{一{图C.2楔角“=300时的各种应力系数标准分享网www.bzfxw.com免费下载 HB5965一2002KIKZti二45”—___K3{7一55。---一___肠扩"v一=了}‘/子弄10一下~响卜叫‘.匕//__-}一丈士-二一二-卜~~_式~~一~一一z一晌夕彬汁~~~~之三匕二二二.」:呈]0.5一}!iI1l1%一图C.4楔角a=5了时的各种应力系数标准分享网www.bzfxw.com免费下载'