静压轴承的各项技术参数
<DIV>轴承直径<FONT face="Times New Roman">D=60mm</FONT>，宽度<FONT face="Times New Roman">L=110mm,</FONT>直径间隙<FONT face="Times New Roman">2h<SUB>0</SUB>=0.030mm</FONT>，供油压力<FONT face="Times New Roman">p<SUB> s</SUB>=1.6MPa</FONT>，润滑油为<FONT face="Times New Roman">2</FONT>号主轴油。</DIV><DIV><B>（1） </B><B>主轴回转精度</B><B></B></DIV><DIV>用两种方法测量主轴回转精度。一种是千分表测量法，把千分表架固定在磨头体上，是表测头直接接触主轴前端定位锥面进行测量；另一种是在主轴定位锥面上安装一个模拟砂轮的钢套，再用固定在工作台的小砂轮对被测外圆进行修正，尔后用<FONT face="Times New Roman">CW</FONT>－<FONT face="Times New Roman">6</FONT>型非接触电容测量模拟钢件的外圆。在供油压力<FONT face="Times New Roman">P<SUB>s</SUB></FONT>＝<FONT face="Times New Roman">1.2MPa</FONT>、润滑油为<FONT face="Times New Roman">2</FONT>号主轴油、轴承直径间隙<FONT face="Times New Roman">2 h<SUB>0</SUB></FONT>＝<FONT face="Times New Roman">0.030mm</FONT>时，实测主轴回转精度值列于表<FONT face="Times New Roman">1</FONT>－<FONT face="Times New Roman">1</FONT>。</DIV><DIV align=center><B>表</B><B><FONT face="Times New Roman">1</FONT></B><B>－</B><B><FONT face="Times New Roman">1 </FONT></B><B>回转精度测定</B><B></B></DIV><P><TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD width=189 rowSpan=2><DIV align=center><B>测量方式</B><B></B></DIV></TD><TD width=379 colSpan=2><DIV align=center><B>回转精度（</B><B>µ</B><B><FONT face="Times New Roman">m</FONT></B><B>）</B><B></B></DIV></TD></TR><TR><TD width=189><DIV align=center><B><FONT face="Times New Roman">1500r/min</FONT></B></DIV></TD><TD width=189><DIV align=center><B><FONT face="Times New Roman">3000r/min</FONT></B></DIV></TD></TR><TR><TD width=189><DIV align=center><B>千分表</B><B></B></DIV></TD><TD width=189><DIV align=center><B><FONT face="Times New Roman">1.0</FONT></B></DIV></TD><TD width=189><DIV align=center><B><FONT face="Times New Roman">0.50</FONT></B></DIV></TD></TR><TR><TD width=189><DIV align=center><B>测微仪</B><B></B></DIV></TD><TD width=189><DIV align=center><B><FONT face="Times New Roman">1.3</FONT></B></DIV></TD><TD width=189><DIV align=center><B><FONT face="Times New Roman">0.51</FONT></B></DIV></TD></TR></TBODY></TABLE></P><DIV><B><FONT face="Times New Roman"></FONT></B> </DIV><DIV><B>（2） </B><B>油腔压力测定</B><B></B></DIV><DIV>表<FONT face="Times New Roman">1</FONT>－<FONT face="Times New Roman">2</FONT>给出了四种直径间隙下的油腔压力实测值，测压点均在前轴承水平方向油腔主轴旋转方向下游阶梯处。</DIV><DIV align=center><B>表</B><B><FONT face="Times New Roman">1</FONT></B><B>－</B><B><FONT face="Times New Roman">2 </FONT></B><B>腔压测定值</B><B></B></DIV><P><TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD vAlign=top width=114 rowSpan=2><DIV align=center><B>直径间隙</B><B></B></DIV><DIV align=center><B>（</B><B><FONT face="Times New Roman">mm</FONT></B><B>）</B><B></B></DIV></TD><TD vAlign=top width=114 rowSpan=2><DIV align=center><B>供油压力</B><B></B></DIV><DIV align=center><B>（</B><B><FONT face="Times New Roman">MPa</FONT></B><B>）</B><B></B></DIV></TD><TD vAlign=top width=341 colSpan=3><DIV align=center><B>浅腔压力（</B><B><FONT face="Times New Roman">MPa</FONT></B><B>）</B><B></B></DIV></TD></TR><TR><TD vAlign=top width=114><DIV align=center><B>主轴静止</B><B></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">1500r/min</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">2800r/min</FONT></B></DIV></TD></TR><TR><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">0.015</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">1.50</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">1.42</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">4.20</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">/</FONT></B></DIV></TD></TR><TR><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">0.021</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">1.55</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">1.45</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">4.15</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">5.80</FONT></B></DIV></TD></TR><TR><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">0.026</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">1.20</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">1.05</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">3.90</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">5.20</FONT></B></DIV></TD></TR><TR><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">0.036</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">1.30</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">0.90</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">3.00</FONT></B></DIV></TD><TD vAlign=top width=114><DIV align=center><B><FONT face="Times New Roman">4.00</FONT></B></DIV></TD></TR></TBODY></TABLE></P><DIV><FONT size=3><FONT face="Times New Roman"></FONT></FONT> </DIV><DIV><B>（3） </B><B>主轴系统刚性</B><B></B></DIV><DIV>当主轴转速<FONT face="Times New Roman">N=0</FONT>、供油压力<FONT face="Times New Roman">P<SUB>s </SUB>=0.9MPa</FONT>、轴承直径间隙<FONT face="Times New Roman">2h<SUB>0</SUB>=0.030mm</FONT>时，用千分表和测力环实测轴系的系统刚性列于表<FONT face="Times New Roman">1</FONT>－<FONT face="Times New Roman">3</FONT>。</DIV><DIV align=center><B><FONT face="Times New Roman"></FONT></B> </DIV><DIV align=center><B>表</B><B><FONT face="Times New Roman">1</FONT></B><B>－</B><B><FONT face="Times New Roman">3 </FONT></B><B>主轴砂轮中点处力与位移的测定值</B><B></B></DIV><DIV align=center><B><FONT face="Times New Roman"></FONT></B> </DIV><P><TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD vAlign=top width=95><DIV align=center><B>力（</B><B><FONT face="Times New Roman">N)</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">50</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">70</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">120</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">150</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">200</FONT></B></DIV></TD></TR><TR><TD vAlign=top width=95><DIV align=center><B>位移（</B><B>µ</B><B><FONT face="Times New Roman">m</FONT></B><B>）</B><B></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">1.00</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">1.80</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">2.50</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">2.80</FONT></B></DIV></TD><TD vAlign=top width=95><DIV align=center><B><FONT face="Times New Roman">3.00</FONT></B></DIV></TD></TR></TBODY></TABLE></P><DIV><FONT face="Times New Roman"></FONT> </DIV><DIV>当主轴转速<FONT face="Times New Roman">N=1500/min</FONT>和<FONT face="Times New Roman">2800r/min</FONT>、供油压力<FONT face="Times New Roman">P<SUB> s </SUB>=0.9MPa</FONT>、轴承直径间隙<FONT face="Times New Roman">2h<SUB>0</SUB>=0.030mm</FONT>时，用<FONT face="Times New Roman">CW</FONT>－<FONT face="Times New Roman">6</FONT>型电容测微仪和电磁测力器实测轴系的系统刚性列于表<FONT face="Times New Roman">1</FONT>－<FONT face="Times New Roman">4</FONT>。</DIV><DIV align=center><B>表</B><B><FONT face="Times New Roman">1</FONT></B><B>－</B><B><FONT face="Times New Roman">4 </FONT></B><B>主轴砂轮中点处力与位移的测定值</B><B></B></DIV><DIV align=center><B><FONT face="Times New Roman"></FONT></B> </DIV><P><TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD width=142 rowSpan=3><DIV align=center><B>力</B><B><FONT face="Times New Roman">(N)</FONT></B></DIV></TD><TD width=426 colSpan=3><DIV align=center><B>位移</B><B><FONT face="Times New Roman">(</FONT></B><B>µ</B><FONT face="Times New Roman"><B>m</B><B>)</B></FONT></DIV></TD></TR><TR><TD width=284 colSpan=2><DIV align=center><B><FONT face="Times New Roman">N=1500(r/min)</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">N=2800(r/min)</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">2h<SUB>0 </SUB>= 0.021mm</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">2h<SUB>0 </SUB>= 0.030mm</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">2h<SUB>0 </SUB>= 0.030mm</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">50</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.15</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.25</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.20</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">100</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.25</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.40</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.40</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">150</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.40</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.60</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.50</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">250</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.60</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.90</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.80</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">400</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">1.00</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">1.50</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">1.00</FONT></B></DIV></TD></TR></TBODY></TABLE></P><DIV><FONT size=3><FONT face="Times New Roman"></FONT></FONT> </DIV><DIV><FONT size=3><FONT face="Times New Roman"></FONT></FONT> </DIV><DIV><FONT size=3><FONT face="Times New Roman"></FONT></FONT> </DIV><DIV><FONT size=3><FONT face="Times New Roman"></FONT></FONT> </DIV><DIV><FONT size=3><FONT face="Times New Roman"></FONT></FONT> </DIV><DIV><B>由以上公式计算出轴承的静压承载</B><B></B></DIV><DIV>当主轴的直径<FONT face="Times New Roman">D=60mm</FONT>，宽度<FONT face="Times New Roman">L=110mm,</FONT>直径间隙<FONT face="Times New Roman">2h<SUB>0</SUB>=0.026mm</FONT>。供油压力为<FONT face="Times New Roman">P<SUB>s </SUB>=1.5Mpa</FONT>时<FONT face="Times New Roman">,</FONT>主轴轴承的静压承载为<FONT face="Times New Roman">F=1764N</FONT>。</DIV><DIV><B>主轴轴承的动压承载</B><B></B></DIV><DIV>当主轴的直径<FONT face="Times New Roman">D=70mm</FONT>，宽径比<FONT face="Times New Roman">B=1,</FONT>直径间隙<FONT face="Times New Roman">2h<SUB>0</SUB>=0.026mm</FONT>，主轴转速<FONT face="Times New Roman">N=1500r/min,</FONT>供油压力为<FONT face="Times New Roman">P<SUB>s </SUB>=0.80Mpa</FONT>时，主轴向对于ε(偏心率)变化时的承载能力,轴承的流量 <B><FONT face="Times New Roman">Q</FONT></B>的变化以及润滑油温升<B>Δ</B><B><FONT face="Times New Roman">t</FONT></B>列于表<FONT face="Times New Roman">1</FONT>－<FONT face="Times New Roman">5</FONT>。</DIV><DIV><B><FONT face="Times New Roman"></FONT></B> </DIV><DIV><B>表</B><B><FONT face="Times New Roman">1</FONT></B><B>－</B><B><FONT face="Times New Roman">5</FONT></B></DIV><P><TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD width=142><DIV align=center><B>ε</B><B></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">Fmin</FONT></B></DIV><DIV align=center><B><FONT face="Times New Roman">(N)</FONT></B></DIV></TD><TD width=144><DIV align=center><B><FONT face="Times New Roman">Q</FONT></B></DIV><DIV align=center><B><FONT face="Times New Roman">(ml/min)</FONT></B></DIV></TD><TD width=140><DIV align=center><B>Δ</B><B><FONT face="Times New Roman">t</FONT></B></DIV><DIV align=center><B><FONT face="Times New Roman">( C)</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.1</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">948.3</FONT></B></DIV></TD><TD width=144><DIV align=center><B><FONT face="Times New Roman">306.2</FONT></B></DIV></TD><TD width=140><DIV align=center><B><FONT face="Times New Roman">10.8</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.2</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">1854.5</FONT></B></DIV></TD><TD width=144><DIV align=center><B><FONT face="Times New Roman">320.8</FONT></B></DIV></TD><TD width=140><DIV align=center><B><FONT face="Times New Roman">10.4</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.3</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">2818.4</FONT></B></DIV></TD><TD width=144><DIV align=center><B><FONT face="Times New Roman">341.0</FONT></B></DIV></TD><TD width=140><DIV align=center><B><FONT face="Times New Roman">10.2</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.4</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">3966.9</FONT></B></DIV></TD><TD width=144><DIV align=center><B><FONT face="Times New Roman">334.8</FONT></B></DIV></TD><TD width=140><DIV align=center><B><FONT face="Times New Roman">10.8</FONT></B></DIV></TD></TR><TR><TD width=142><DIV align=center><B><FONT face="Times New Roman">0.5</FONT></B></DIV></TD><TD width=142><DIV align=center><B><FONT face="Times New Roman">5899.4</FONT></B></DIV></TD><TD width=144><DIV align=center><B><FONT face="Times New Roman">311.1</FONT></B></DIV></TD><TD width=140><DIV align=center><B><FONT face="Times New Roman">12.6</FONT></B></DIV></TD></TR></TBODY></TABLE></P>
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