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class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">å¦ä¸€¿U是˜qžç®‹æŽ§åˆ¶åQšé˜€å£å¯ä»¥æ ¹æ®éœ€è¦æ‰“å¼€ä»ÀL„一个开度,由此控制通过‹¹é‡çš„大ž®ï¼Œ˜q™ç±»é˜€æœ‰æ‰‹åŠ¨æŽ§åˆ¶çš„åQŒå¦‚节æµé˜€åQŒä¹Ÿæœ‰ç”µæŽ§çš„åQŒå¦‚比例阀ã€ä¼ºæœé˜€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æœé˜€çš„目的就是:以电控方å¼å®žçް坹‹¹é‡çš„节‹¹æŽ§åˆÓž¼ˆå½“ç„¶¾l过¾l“构上的改动也å¯å®žçŽ°åŽ‹åŠ›æŽ§åˆ¶½{‰ï¼‰åQŒæ—¢ç„¶æ˜¯èŠ‚æµæŽ§åˆ¶åQŒå°±å¿…ç„¶æœ‰èƒ½é‡æŸå¤±ï¼Œä¼ºæœé˜€å’Œå…¶å®ƒé˜€ä¸åŒçš„æ˜¯åQŒå®ƒçš„èƒ½é‡æŸå¤±æ›´å¤§ä¸€äº›ï¼Œå› äؓ它需è¦ä¸€å®šçš„‹¹é‡æ¥ç»´æŒå‰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æœé˜€çš„主阀一般æ¥è¯´å’Œæ¢å‘阀一æ äh˜¯æ»‘阀¾l“æž„åQŒåªä¸è¿‡é˜€èŠ¯çš„æ¢å‘䏿˜¯é ç”µ¼‚铿¥æŽ¨åŠ¨ï¼Œè€Œæ˜¯é å‰¾|®çñ”é˜€è¾“å‡ºçš„æ¶²åŽ‹åŠ›æ¥æŽ¨åŠ¨ï¼Œ˜q™ä¸€ç‚¹å’Œç”‰|¶²æ¢å‘é˜€æ¯”è¾ƒç›æ€¼¼åQŒåªä¸è¿‡ç”‰|¶²æ¢å‘阀的剾|®çñ”阀是电¼‚æ¢å‘阀åQŒè€Œä¼ºæœé˜€çš„剾|®çñ”阀是动æ€ç‰¹æ€§æ¯”较好的喷嘴挡æ‰K˜€æˆ–å°„‹¹ç®¡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åQŒä¼ºæœé˜€çš„主阀是é å‰ç½®¾U§é˜€çš„è¾“å‡ºåŽ‹åŠ›æ¥æŽ§åˆ¶çš„ï¼Œè€Œå‰¾|®çñ”阀的压力则æ¥è‡ªäºŽä¼ºæœé˜€çš„å…¥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;">å£çš„压力ä¸èƒöåQŒå‰¾|®çñ”阀ž®×ƒ¸èƒ½è¾“凸™ƒöå¤Ÿçš„åŽ‹åŠ›æ¥æŽ¨åŠ¨ä¸»é˜€èŠ¯åŠ¨ä½œã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">而我们知é“ï¼Œå½“è´Ÿè½½äØ“é›¶çš„æ—¶å€™ï¼Œå¦‚æžœå››é€šæ»‘é˜€å®Œå…¨æ‰“å¼€åQ?/span><span style="font-size:16px;">p</span><span style="font-size:16px;">å£åŽ‹åŠ?/span><span style="font-size:16px;">=t</span><span style="font-size:16px;">å£åŽ‹åŠ?/span><span style="font-size:16px;">+</span><span style="font-size:16px;">阀å£åŽ‹åŠ›æŸå¤±ï¼ˆå¿½ç•¥æ²¹èµ\上的其它压力æŸå¤±åQ‰ï¼Œå¦‚果阀å£åŽ‹åŠ›æŸå¤±å¾ˆž®ï¼Œ</span><span style="font-size:16px;">t</span><span style="font-size:16px;">å£åŽ‹åŠ›åˆä¸ºé›¶åQŒé‚£ä¹?/span><span style="font-size:16px;">p</span><span style="font-size:16px;">å£çš„压力ž®×ƒ¸­‘³ä»¥ä¾›ç»™å‰ç½®¾U§é˜€æ¥æŽ¨åŠ¨ä¸»é˜€èŠ¯ï¼Œæ•´ä¸ªä¼ºæœé˜€ž®±å¤±æ•ˆäº†ã€‚所以伺æœé˜€çš„阀å£åšå¾—垮,å³ä‹É在阀å£å…¨å¼€çš„æƒ…况下åQŒä¹Ÿè¦æœ‰ä¸€å®šçš„压力æŸå¤±åQŒæ¥¾l´æŒå‰ç½®¾U§é˜€çš„æ­£å¸¸å·¥ä½œã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">伺æœé˜€å…¶å®ž¾~ºç‚¹æžå¤šåQšèƒ½è€—浪费大ã€å®¹æ˜“å‡ºæ•…éšœã€æŠ—æ±¡æŸ“èƒ½åŠ›å·®ã€ä­h格昂è´ëŠ­‰½{‰ç­‰½{‰ï¼Œå¥½å¤„åªæœ‰ä¸€ä¸ªï¼šåŠ¨æ€æ€§èƒ½æ˜¯æ‰€æœ‰æ¶²åŽ‹é˜€ä¸?*****的。就凭瀘q™ä¸€ä¸ªä¼˜ç‚¹ï¼Œåœ¨å¾ˆå¤šå¯¹åЍæ€ç‰¹æ€§è¦æ±‚高的场åˆä¸å¾—ä¸ä½¿ç”¨ä¼ºæœé˜€åQŒå¦‚飞机ç«ç®­çš„èˆµæœºæŽ§åˆ¶ã€æ±½è½®æœºè°ƒé€Ÿç­‰½{‰ã€‚动æ€è¦æ±‚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æ¥ï¼Œå¥½åƒä¼ºæœ¾pÈ»Ÿéƒ½æ˜¯é—­çŽ¯æŽ§åˆ¶åQŒæ¯”例多用于开环控åˆÓž¼›å…¶æ¬¡æ¯”例阀¾cÕdž‹è¦å¤šåQŒæœ‰æ¯”ä¾‹åŽ‹åŠ›ã€æµé‡æŽ§åˆ‰™˜€½{‰ï¼ŒæŽ§åˆ¶æ¯”伺æœè¦ç‰|´»ä¸€äº›ã€‚从他们内部¾l“构看,伺æœé˜€å¤šæ˜¯é›‰™®ç›–,比例阀则有一定的æ­ÕdŒºåQŒæŽ§åˆ¶ç²¾åº¦è¦ä½Žï¼Œå“åº”è¦æ…¢ã€‚但从å‘展趋势看åQŒç‰¹åˆ«åœ¨æ¯”例方呋¹é‡æŽ§åˆ¶é˜€å’Œä¼ºæœé˜€æ–šw¢åQŒä¸¤è€…æ€§èƒ½å·®åˆ«é€æ¸åœ¨ç¾ƒž®ï¼Œå¦å¤–æ¯”ä¾‹é˜€çš„æˆæœ¬æ¯”伺æœé˜€è¦ä½Žè®¸å¤šåQŒæŠ—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æœé˜€ä¸Žæ¯”例阀的区别伺æœé˜€ä¸Žæ¯”ä¾‹é˜€ä¹‹é—´çš„å·®åˆ«åÆˆæ²¡æœ‰ä¸¥æ ¼çš„è§„å®šï¼Œå› äØ“æ¯”ä¾‹é˜€çš„æ€§èƒ½­‘Šæ¥­‘Šå¥½åQŒé€æ¸å‘伺æœé˜€é è¿‘åQŒæ‰€ä»¥è¿‘些年出现了比例伺æœé˜€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æœé˜€çš„区别主è¦ä½“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ä¸åŒã€‚比例阀的驱动装¾|®æ˜¯æ¯”例ç”늣é“;伺æœé˜€çš„驱动装¾|®æ˜¯åŠ›é©¬è¾¾æˆ–åŠ›çŸ©é©¬è¾¾åQ? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">2.</span><span style="font-size:16px;">æ€§èƒ½å‚æ•°ä¸åŒã€‚滞环ã€ä¸­ä½æ­»åŒºã€é¢‘宽ã€è¿‡æ»¤ç²¾åº¦ç­‰ç‰ÒŽ€§ä¸åŒï¼Œå› æ­¤åº”用场åˆä¸åŒåQŒä¼ºæœé˜€å’Œä¼ºæœæ¯”例阀主è¦åº”用在闭环控制系¾lŸï¼Œå…¶å®ƒ¾l“构的比例阀主è¦åº”用在开环控¾pÈ»ŸåŠé—­çŽ¯é€Ÿåº¦æŽ§åˆ¶¾pÈ»ŸåQ? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">2.1</span><span style="font-size:16px;">伺æœé˜€ä¸­ä½æ²¡æœ‰æ­ÕdŒºåQŒæ¯”ä¾‹é˜€æœ‰ä¸­ä½æ­»åŒºï¼›  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">2.2</span><span style="font-size:16px;">伺æœé˜€çš„频å“(å“应频率åQ‰æ›´é«˜ï¼Œå¯ä»¥é«˜è¾¾</span><span style="font-size:16px;">200Hz</span><span style="font-size:16px;">å·¦å³åQŒæ¯”例阀一èˆ?*****几å</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æœé˜€å¯Ò޶²åŽ‹æÑaæ¶²çš„è¦æ±‚更高åQŒéœ€è¦ç²¾˜q‡æ×oæ‰è¡ŒåQŒå¦åˆ™å®¹æ˜“å µå¡žï¼Œæ¯”ä¾‹é˜€è¦æ±‚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åŠåŠ å·¥¾_‘Öº¦ä¸åŒã€‚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æœé˜€å’Œä¼ºæœæ¯”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;">䏭使œø™ƒ½¿Uç±»ä¸åŒã€‚比例æ¢å‘阀å…ähœ‰ä¸Žæ™®é€šæ¢å‘é˜€ç›æ€¼¼çš„䏭使œºèƒ½ï¼Œè€Œä¼ºæœé˜€ä¸­ä½æœø™ƒ½åªæœ‰</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å“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é¢å®šåŽ‹é™ä¸åŒã€? </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span style="font-size:16px;">而比例伺æœé˜€æ€§èƒ½ä»‹äºŽä¼ºæœé˜€å’Œæ¯”例阀之间ã€?/span><span style="font-size:16px;">  </span> </p> <p class="MsoNormal" style="text-indent:2em;"> <span 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