航空 发表于 2011-7-15 23:41:25

ATA77章-发动机指示系统-EGT接线盒及热电偶的测量、发动机配平

<P>**** Hidden Message *****</P>

航空 发表于 2011-7-15 23:41:43

<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">ATA77</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt"><FONT face="Times New Roman"><SPAN lang=EN-US style="mso-fareast-font-family: 'Times New Roman'"><SPAN style="mso-list: Ignore">1.<SPAN style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></SPAN><SPAN lang=EN-US>EGT</SPAN></FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">接线盒及热电偶的测量：</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">1.1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">我们在航线维护中经常会碰到大发</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">EGT</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">摆动的情况，有时在发动机慢车的时候</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">EGT</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">指示如</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">90</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">摄氏度，有时头晚大雨后第二天一早启动大发</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">EGT</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">乱跳，有时早上启动大发</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">EGT</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">超限到红区，这时是否是真的超温有待分析，如此等等。根据经验，这些情况大部分是因为</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">EGT</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的测量指示系统出现问题；</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">1.2</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">测量接线盒上接线柱的绝缘性要用摇表，一个合格的接线盒的接线柱之间的电阻应该是很大的，也就是说接线柱的对地电阻越大，接线盒输出的温度值越准确，至少是兆欧级跳变，电阻越大越好；</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">1.3</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">而热电偶是由两种不同合金组合在一起测量温度的一个部件，飞机刚下来直接去测热电偶的电阻取得的值是不准确的，可以领出一个新的热电偶测量之后比较，</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">TSM</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">上对热电偶的标准值是有描述的，受热情况下，温度越高，热电偶的阻值越大。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">2.</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">发动机配平：</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">2.1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">发动机配平航线维护只能配</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">N1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">N1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的振动值</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">VIB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">超过</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">2.0</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">就可以考虑配平了；</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">2.2</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">配平分为</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">24</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">颗的和</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">36</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">颗的配平，</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">36</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">颗的配平要拆掉整流锥；螺栓的起始点在一个盘面的“</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">*</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”号处，面对的逆时针方向依次数是螺栓顺序；</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">2.3</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">大发配平是一个</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">EXCEL</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">软件，数据源来自飞机的震动报告上的大发转速</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">N1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、相位角度、震动值，尽量采用几个最大的有效数据输入。结合航材有件的配平块的件号输入，通过计算，就会得到在哪个位置装上那个件号的配平块；</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">2.4</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如果原有的圈上装有配平块，原则上是要取掉重新试车采集数据用来计算，如果需要保留原来的配平块的话，可以在软件上相应位置勾掉该位置螺栓，视为无效数据输入；</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">2.5</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">很重要的一点，比如需要在</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">24</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">颗螺栓的圈上的</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">18</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号位置装上配平块，手册上要求装上之前要取掉相应位置的螺栓垫片，切记！</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">2.6</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">外圈固定整流环的六个位置，原则上不能装配平块。</SPAN></P>

hyfu2011 发表于 2011-7-18 01:08:00

回复 1# 航空 的帖子

辛苦辛苦，学习学习

bocome 发表于 2011-7-28 19:58:30

ATA77章-发动机指示系统-EGT接线盒及热电偶的测量、发动机配平

DONGZHANG 发表于 2011-11-11 14:37:03

学习为王  永不停止

天若有情 发表于 2011-11-12 20:39:53

very good,I love ni

petrosche 发表于 2012-2-15 14:28:39

顶顶顶顶！

officefree 发表于 2012-3-23 10:20:19

学习了~~~谢谢楼主

show616 发表于 2012-3-23 11:41:29

dasfdafdafda

mingguang369 发表于 2012-4-2 21:54:44

:handshake
页: [1] 2
查看完整版本: ATA77章-发动机指示系统-EGT接线盒及热电偶的测量、发动机配平