液壓係統留意事項

    液壓係統留意事項

    有you一yi點dian機ji械xie常chang識shi的de人ren都dou曉xiao得de
，能neng量liang會hui相xiang互hu轉zhuan換huan的de，而er把ba這zhe個ge學xue問wen運yun用yong到dao液ye壓ya係xi統tong上shang解jie釋shi液ye壓ya係xi統tong的de功gong率lv損sun失shi是shi最zui好hao不bu過guo了le，液ye壓ya係xi統tong功gong率lv一yi方fang麵mian會hui形xing成cheng能neng量liang上shang的de損sun失shi

，使shi係xi統tong的de總zong效xiao率lv降jiang落luo，另ling一yi方fang麵mian
，損sun失shi掉diao的de這zhe一yi局ju部bu能neng量liang將jiang會hui轉zhuan變bian成cheng熱re能neng
，使shi液ye壓ya油you的de溫wen度du升sheng高gao，油you液ye蛻tui變bian，招zhao致zhi液ye壓ya設she備bei呈cheng現xian毛mao病bing。因yin而er
，設she計ji液ye壓ya係xi統tong時shi，在zai滿man足zu運yun用yong請qing求qiu的de前qian提ti下xia，還hai應ying充chong沛pei思si索suo降jiang低di係xi統tong的de功gong率lv損sun失shi。

    第一，從動力源——泵的方麵來思索，思索到執行器工作情況的多樣化，有時係統需求大流量，低壓力；有you時shi又you需xu求qiu小xiao流liu量liang
，高gao壓ya力li。所suo以yi選xuan擇ze限xian壓ya式shi變bian量liang泵beng為wei宜yi，由you於yu這zhe品pin種zhong型xing的de泵beng的de流liu量liang隨sui係xi統tong壓ya力li的de變bian化hua而er變bian化hua。當dang係xi統tong壓ya力li降jiang低di時shi，流liu量liang比bi擬ni大da
，能neng滿man足zu執zhi行xing器qi的de快kuai速su行xing程cheng。當dang係xi統tong壓ya力li進jin步bu時shi流liu量liang又you相xiang應ying減jian小xiao
，能neng滿man足zu執zhi行xing器qi的de工gong作zuo行xing程cheng。這zhe樣yang既ji能neng滿man足zu執zhi行xing器qi的de工gong作zuo請qing求qiu，又you能neng使shi功gong率lv的de耗hao費fei比bi擬ni合he理li。

    dier
，yeyayouliujinggeleiyeyafashibukefangzhidecunzaizheyalisunshiheliuliangsunshi，zheyijubudenengliangsunshizaiquanbunengliangsunshizhongzhanyoujiaodadebizhong。yiner，helixuanzeyeyaqi

，tiaozhengyalifadeyaliyeshijiangdigonglvsunshideyigezhongyaofangmian。liuliangfaanxitongzhongliuliangtiaolifanweixuanqubingbaozhengqizuixiaowendingliuliangnengmanzuyunyongqingqiu，yalifadeyalizaimanzuyeyashebeizhengchanggongzuodezhuangkuangxia

，jinliangqujiaodideyali。[7]

    第三
，假如執行用具有調速的請求，那麼在選擇調速回路時，既要滿足調速的請求，又要盡量減少功率損失。常見的調速回路主要有：節jie流liu調tiao速su回hui路lu
，容rong積ji調tiao速su回hui路lu，容rong積ji節jie流liu調tiao速su回hui路lu。其qi中zhong節jie流liu調tiao速su回hui路lu的de功gong率lv損sun失shi大da
，低di速su穩wen定ding性xing好hao。而er容rong積ji調tiao速su回hui路lu既ji無wu溢yi流liu損sun失shi，也ye無wu節jie流liu損sun失shi
，效xiao率lv高gao
，但dan低di速su穩wen定ding性xing差cha。假jia如ru要yao同tong時shi滿man足zu兩liang方fang麵mian的de請qing求qiu，可ke采cai用yong差cha壓ya式shi變bian量liang泵beng和he節jie流liu閥fa組zu成cheng的de容rong積ji節jie流liu調tiao速su回hui路lu，並bing使shi節jie流liu閥fa兩liang端duan的de壓ya力li差cha盡jin量liang小xiao，以yi減jian小xiao壓ya力li損sun失shi。

    第di四si，合he理li選xuan擇ze液ye壓ya油you。液ye壓ya油you在zai管guan路lu中zhong活huo動dong時shi，將jiang呈cheng現xian出chu黏nian性xing，而er黏nian性xing過guo高gao時shi，將jiang產chan生sheng較jiao大da的de內nei摩mo擦ca力li

，形xing成cheng油you液ye發fa熱re，同tong時shi增zeng加jia油you液ye活huo動dong時shi的de阻zu力li。當dang黏nian性xing過guo低di時shi
，易yi形xing成cheng走zou漏lou
，將jiang降jiang低di係xi統tong容rong積ji效xiao率lv
，因yin而er
，普pu通tong選xuan擇ze黏nian度du適shi合he且qie黏nian溫wen特te性xing比bi擬ni好hao的de油you液ye。另ling外wai，當dang油you液ye在zai管guan路lu中zhong活huo動dong時shi
，還hai存cun在zai著zhe沿yan程cheng壓ya力li損sun失shi和he部bu分fen壓ya力li損sun失shi
，因yin而er設she計ji管guan路lu時shi盡jin量liang縮suo短duan管guan道dao，同tong時shi減jian少shao彎wan管guan。

    yishangjiushifangzhiyeyaxitonggonglvsunshisuotichulaidejidiangongzuo，danshiyingxiangyeyaxitonggonglvsunshideyaosuhaiyouhenduo，suoyijiarudangxiangxishejiyiyeyaxitongshi，haixuzonghesisuoqitagegefangmiandeqingqiu。