德國(guó)Rexroth力士樂(lè)比例閥規(guī)格特點(diǎn)
Rexroth力士樂(lè)氣動(dòng)和力士樂(lè)液壓是我們常做的兩大產(chǎn)品,包括電磁閥、比例閥、換向閥、柱塞泵、油泵、葉片泵等。我司從2006年注冊(cè)以來(lái),已經(jīng)有了將近9年的銷售經(jīng)驗(yàn),我們從租房面積20平米到126平米,公司規(guī)模在不斷的擴(kuò)大,隨著時(shí)間的見證,我們所以全體員工服務(wù)質(zhì)量越來(lái)越負(fù)責(zé),歡迎新老客戶前來(lái)查看。
德國(guó)Rexroth力士樂(lè)比例閥規(guī)格特點(diǎn)
Rexroth力士樂(lè)氣動(dòng)和力士樂(lè)液壓是我們常做的兩大產(chǎn)品,包括電磁閥、比例閥、換向閥、柱塞泵、油泵、葉片泵等。我司從2006年注冊(cè)以來(lái),已經(jīng)有了將近9年的銷售經(jīng)驗(yàn),我們從租房面積20平米到126平米,公司規(guī)模在不斷的擴(kuò)大,隨著時(shí)間的見證,我們所以全體員工服務(wù)質(zhì)量越來(lái)越負(fù)責(zé),歡迎新老客戶前來(lái)查看。
德國(guó)Rexroth力士樂(lè)比例閥規(guī)格特點(diǎn)
德國(guó)力士樂(lè)REXROTH比例閥也就是說(shuō),伺服閥的主閥是靠前置級(jí)閥的輸出壓力來(lái)控制的,而前置級(jí)閥的壓力則來(lái)自于伺服閥的入口p,假如p口的壓力不足,前置級(jí)閥就不能輸出足夠的壓力來(lái)推動(dòng)主閥芯動(dòng)作。
德國(guó)力士樂(lè)REXROTH比例閥其實(shí)缺點(diǎn)極多:能耗浪費(fèi)大、容易出故障、抗污染能力差、價(jià)格昂貴等等等等,好處只有一個(gè):動(dòng)態(tài)性能是所有液壓閥中zui高的。就憑著這一個(gè)優(yōu)點(diǎn),在很多對(duì)動(dòng)態(tài)特性要求高的場(chǎng)合不得不使用伺服閥,如飛機(jī)火箭的舵機(jī)控制、汽輪機(jī)調(diào)速等等。動(dòng)態(tài)要求低一點(diǎn)的,基本上都是比例閥的天下了。一般說(shuō)來(lái),好像伺服系統(tǒng)都是閉環(huán)控制,比例多用于開環(huán)控制;其次比例閥類型要多,有比例壓力、流量控制閥等,控制比伺服藥?kù)`活一些。從他們內(nèi)部結(jié)構(gòu)看,伺服閥多是零遮蓋,比例閥則有一定的死區(qū),控制精度要低,向應(yīng)要慢。但從發(fā)展趨勢(shì)看,特別在比例方向流量控制閥和伺服閥方面,兩者性能差別逐漸在縮小,另外比例閥的成本比伺服閥要低許多,抗污染能力也強(qiáng)!
常用型號(hào):
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