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href="/news/">新闻信息</a> > 详细内容 </div><h2>新闻资讯<span>/News</span></h2> </div> <div class="container"> <div class="content"> <h3>比例阀¾l´ä¿®æœ‰é‚£äº›è¦ç‚? </h3> <h6>来源åQšwww.lookmytrip.com    å‘布旉™—´åQ?019-07-25</h6> <div class="detail" id="zoom" style="width:558px; overflow:hidden; margin-bottom:5px;"><p><p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">比例阀如何¾l´ä¿®</span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">阀å¯ÒŽµé‡çš„控制可以分äؓ两种åQ?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">一¿Uæ˜¯å¼€å…ÏxŽ§åˆÓž¼šè¦ä¹ˆå…¨å¼€ã€è¦ä¹ˆå…¨å…»I¼Œ‹¹é‡è¦ä¹ˆ</span><span style="font-size:16px;">zui</span><span style="font-size:16px;">大、要ä¹?/span><span style="font-size:16px;">zui</span><span style="font-size:16px;">ž®ï¼Œæ²¡æœ‰ä¸­é—´çŠ¶æ€ï¼Œå¦‚普通的ç”늣ç›´é€šé˜€ã€ç”µ¼‚æ¢å‘阀、电液换向阀ã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">另一¿Uæ˜¯˜qžç®‹æŽ§åˆ¶åQšé˜€å£å¯ä»¥æ ¹æ®éœ€è¦æ‰“å¼€ä»ÀL„ä¸€ä¸ªå¼€åº¦ï¼Œç”±æ­¤æŽ§åˆ¶é€šè¿‡‹¹é‡çš„大ž®ï¼Œ˜q™ç±»é˜€æœ‰æ‰‹åŠ¨æŽ§åˆ¶çš„åQŒå¦‚节流阀åQŒä¹Ÿæœ‰ç”µæŽ§çš„åQŒå¦‚比例阀、伺服阀ã€?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">所以ä‹É用比例阀或伺服阀的目的就是:以电控方式实现对‹¹é‡çš„节‹¹æŽ§åˆÓž¼ˆå½“然¾lè¿‡¾l“构上的改动也可实现压力控制½{‰ï¼‰åQŒæ—¢ç„¶æ˜¯èŠ‚流控制åQŒå°±å¿…然有能量损失,伺服阀和其它阀不同的是åQŒå®ƒçš„能量损失更大一些,因äؓ它需要一定的‹¹é‡æ¥ç»´æŒå‰¾|®çñ”控制油èµ\的工作ã€?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">滑阀¾l“构伺服阀的主阀一般来说和换向阀一æ äh˜¯æ»‘阀¾l“æž„åQŒåªä¸è¿‡é˜€èŠ¯çš„换向不是靠电¼‚é“æ¥æŽ¨åŠ¨ï¼Œè€Œæ˜¯é å‰¾|®çñ”阀输出的液压力来推动,˜q™ä¸€ç‚¹å’Œç”‰|¶²æ¢å‘阀比较ç›æ€¼¼åQŒåªä¸è¿‡ç”‰|¶²æ¢å‘阀的前¾|®çñ”阀是电¼‚æ¢å‘阀åQŒè€Œä¼ºæœé˜€çš„前¾|®çñ”阀是动态特性比较好的喷嘴挡杉K˜€æˆ–å°„‹¹ç®¡é˜€ã€?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">也就是说åQŒä¼ºæœé˜€çš„主阀是靠前置¾U§é˜€çš„输出压力来控制的,而前¾|®çñ”阀的压力则来自于伺服阀的入å?/span><span style="font-size:16px;">p</span><span style="font-size:16px;">åQŒå‡å¦?/span><span style="font-size:16px;">p</span><span style="font-size:16px;">口的压力不èƒöåQŒå‰¾|®çñ”阀ž®×ƒ¸èƒ½è¾“å‡ø™ƒö够的压力来推动主阀芯动作ã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">而我们知道,当负载äؓ零的时候,如果四通滑阀完全打开åQ?/span><span style="font-size:16px;">p</span><span style="font-size:16px;">口压åŠ?/span><span style="font-size:16px;">=t</span><span style="font-size:16px;">口压åŠ?/span><span style="font-size:16px;">+</span><span style="font-size:16px;">阀口压力损失(忽略油èµ\上的其它压力损失åQ‰ï¼Œå¦‚果阀口压力损失很ž®ï¼Œ</span><span style="font-size:16px;">t</span><span style="font-size:16px;">口压力又为零åQŒé‚£ä¹?/span><span style="font-size:16px;">p</span><span style="font-size:16px;">口的压力ž®×ƒ¸­‘³ä»¥ä¾›ç»™å‰ç½®¾U§é˜€æ¥æŽ¨åŠ¨ä¸»é˜€èŠ¯ï¼Œæ•´ä¸ªä¼ºæœé˜€ž®±å¤±æ•ˆäº†ã€‚所以伺服阀的阀口做得偏ž®ï¼Œå³ä‹É在阀口全开的情况下åQŒä¹Ÿè¦æœ‰ä¸€å®šçš„压力损失åQŒæ¥¾l´æŒå‰ç½®¾U§é˜€çš„正常工作ã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">伺服阀其实¾~ºç‚¹æžå¤šåQšèƒ½è€—浪费大、容易出故障、抗污染能力差、ä­h格昂è´ëŠ­‰½{‰ï¼Œå¥½å¤„只有一个:动态性能是所有液压阀ä¸?*****的。就凭着˜q™ä¸€ä¸ªä¼˜ç‚¹ï¼Œåœ¨å¾ˆå¤šå¯¹åŠ¨æ€ç‰¹æ€§è¦æ±‚高的场合不得不使用伺服阀åQŒå¦‚飞机火箭的舵机控制、汽轮机调速等½{‰ã€‚动态要求低一点的åQŒåŸºæœ¬ä¸Šéƒ½æ˜¯æ¯”例阀的天下了ã€?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">一般说来,好像伺服¾pȝ»Ÿéƒ½æ˜¯é—­çŽ¯æŽ§åˆ¶åQŒæ¯”例多用于开环控åˆÓž¼›å…¶æ¬¡æ¯”例阀¾cÕdž‹è¦å¤šåQŒæœ‰æ¯”例压力、流量控刉™˜€½{‰ï¼ŒæŽ§åˆ¶æ¯”伺服要灉|´»ä¸€äº›ã€‚从他们内部¾l“构看,伺服阀多是雉™®ç›–,比例阀则有一定的æ­ÕdŒºåQŒæŽ§åˆ¶ç²¾åº¦è¦ä½Žï¼Œå“åº”要慢。但从发展趋势看åQŒç‰¹åˆ«åœ¨æ¯”例方向‹¹é‡æŽ§åˆ¶é˜€å’Œä¼ºæœé˜€æ–šw¢åQŒä¸¤è€…性能差别逐渐在羃ž®ï¼Œå¦å¤–比例阀的成本比伺服阀要低许多åQŒæŠ—污染能力也强åQ?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">伺服阀与比例阀的区别伺服阀与比例阀之间的差别åƈ没有严格的规定,因äؓ比例阀的性能­‘Šæ¥­‘Šå¥½åQŒé€æ¸å‘伺服阀靠近åQŒæ‰€ä»¥è¿‘些年出现了比例伺服阀ã€?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">比例阀和伺服阀的区别主要体现在以下几点åQ?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">1.</span><span style="font-size:16px;">驱动装置不同。比例阀的驱动装¾|®æ˜¯æ¯”例ç”늣é“ï¼›ä¼ºæœé˜€çš„驱动装¾|®æ˜¯åŠ›é©¬è¾¾æˆ–力矩马达åQ? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">2.</span><span style="font-size:16px;">性能参数不同。滞环、中位死区、频宽、过滤精度等ç‰ÒŽ€§ä¸åŒï¼Œå› æ­¤åº”用场合不同åQŒä¼ºæœé˜€å’Œä¼ºæœæ¯”例阀主要应用在闭环控制系¾lŸï¼Œå…¶å®ƒ¾l“构的比例阀主要应用在开环控¾pȝ»ŸåŠé—­çŽ¯é€Ÿåº¦æŽ§åˆ¶¾pȝ»ŸåQ? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">2.1</span><span style="font-size:16px;">伺服阀中位没有æ­ÕdŒºåQŒæ¯”例阀有中位死区;  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">2.2</span><span style="font-size:16px;">伺服阀的频响(响应频率åQ‰æ›´é«˜ï¼Œå¯ä»¥é«˜è¾¾</span><span style="font-size:16px;">200Hz</span><span style="font-size:16px;">左右åQŒæ¯”例阀一èˆ?*****几十</span><span style="font-size:16px;">Hz</span><span style="font-size:16px;">åQ? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">2.3</span><span style="font-size:16px;">伺服阀å¯ÒŽ¶²åŽ‹æÑa液的要求更高åQŒéœ€è¦ç²¾˜q‡æ×o才行åQŒå¦åˆ™å®¹æ˜“堵塞,比例阀要求低一些;  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">3.</span><span style="font-size:16px;">阀芯结构及加工¾_‘Öº¦ä¸åŒã€‚比例阀采用阀èŠ?/span><span style="font-size:16px;">+</span><span style="font-size:16px;">阀体结构,阀体兼作阀套。伺服阀和伺服比例阀采用阀èŠ?/span><span style="font-size:16px;">+</span><span style="font-size:16px;">阀套的¾l“æž„ã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">4.</span><span style="font-size:16px;">中位æœø™ƒ½¿Uç±»ä¸åŒã€‚比例换向阀å…ähœ‰ä¸Žæ™®é€šæ¢å‘阀ç›æ€¼¼çš„中位机能,而伺服阀中位æœø™ƒ½åªæœ‰</span><span style="font-size:16px;">O</span><span style="font-size:16px;">型(</span><span style="font-size:16px;">Rexroth</span><span style="font-size:16px;">产品çš?/span><span style="font-size:16px;">E</span><span style="font-size:16px;">型)ã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">5.</span><span style="font-size:16px;">阀的额定压降不同ã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">而比例伺服阀性能介于伺服阀和比例阀之间ã€?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">比例换向阀属于比例阀的一¿Uï¼Œç”¨æ¥æŽ§åˆ¶‹¹é‡å’Œæµå?/span><span style="font-size:16px;">  </span> </p></p></div> <p><div>上一æ?<a href="158.html">铭恩液压厂家告诉您比例阀¾l´ä¿®è¦ç‚¹ </a></div> <div>下一æ?<a 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