內(nèi)部培訓(xùn)課件2

1、24 七月 20221力士樂內(nèi)部培訓(xùn)資料2錐閥結(jié)構(gòu)球閥結(jié)構(gòu)214th 15th January 2004, Bosch Rexroth in China插裝式結(jié)構(gòu)：314th 15th January 2004, Bosch Rexroth in China應(yīng)用舉例：直動(dòng)式閥的缺陷：大流量的場合壓力波動(dòng)大、穩(wěn)定性差裝配調(diào)節(jié)困難414th 15th January 2004, Bosch Rexroth in China先導(dǎo)式溢流閥的基本原理由直動(dòng)式的缺陷而來.液壓力與彈簧力;液壓力與液壓力液壓半橋514th 15th January 2004, Bosch Rexroth in China先導(dǎo)

2、式溢流閥的結(jié)構(gòu)614th 15th January 2004, Bosch Rexroth in China714th 15th January 2004, Bosch Rexroth in China泄荷閥：814th 15th January 2004, Bosch Rexroth in China泄荷閥的泄荷緩沖板利用電信號(hào)泄荷響應(yīng)很快，易造成系統(tǒng)的壓力尖峰，噪音等，為了解決上述問題，加裝緩沖板，見圖示914th 15th January 2004, Bosch Rexroth in China多級(jí)調(diào)壓模塊：DB3U1014th 15th January 2004, Bosch Rexr

3、oth in ChinaFor constant pump For variable pump, relationship to DR-control.Soft operation, unloading start. (與DBW相同）1114th 15th January 2004, Bosch Rexroth in China1214th 15th January 2004, Bosch Rexroth in China直動(dòng)式三通減壓閥的結(jié)構(gòu)1314th 15th January 2004, Bosch Rexroth in China應(yīng)用舉例1414th 15th January 2004

4、, Bosch Rexroth in China1514th 15th January 2004, Bosch Rexroth in China先導(dǎo)式減壓閥的結(jié)構(gòu)(兩通式）1614th 15th January 2004, Bosch Rexroth in China先導(dǎo)式、滑閥結(jié)構(gòu)、三通減壓閥力士樂獨(dú)特設(shè)計(jì)大通徑3通減壓閥最大流量 400l/min.1714th 15th January 2004, Bosch Rexroth in China先導(dǎo)式、滑閥結(jié)構(gòu)、三通減壓閥1814th 15th January 2004, Bosch Rexroth in China1914th 15th J

5、anuary 2004, Bosch Rexroth in China2014th 15th January 2004, Bosch Rexroth in China順序閥利用壓力來控制油路的通斷，相當(dāng)于一個(gè)液控的二位二通的方向閥。與溢流閥類似， 只是后接工作油路，一般控制油需外泄。2114th 15th January 2004, Bosch Rexroth in China先導(dǎo)式順序閥的結(jié)構(gòu)先導(dǎo)控制油經(jīng)4.1作用于閥芯5, 來改變主閥芯上腔的壓力2214th 15th January 2004, Bosch Rexroth in China卸荷溢流閥的結(jié)構(gòu)和工作原理先導(dǎo)閥一次開啟通過球閥9

6、; 此時(shí)閥桿6處于力平衡狀態(tài), 開啟后, 主閥 上腔壓力下降. 二次保持通過頂桿6; 此時(shí), 頂桿6一側(cè)卸荷; 頂桿6的作用面積比球閥 的作用面積大10%或17%.2314th 15th January 2004, Bosch Rexroth in China2414th 15th January 2004, Bosch Rexroth in China2514th 15th January 2004, Bosch Rexroth in China2614th 15th January 2004, Bosch Rexroth in China流量控制閥分類：節(jié)流閥調(diào)速閥分流集流閥剎車閥(平衡閥

7、)防管路爆破閥（限速切斷閥）2714th 15th January 2004, Bosch Rexroth in China節(jié)流閥MG/MK6302814th 15th January 2004, Bosch Rexroth in ChinaMK-521022914th 15th January 2004, Bosch Rexroth in China節(jié)流閥3014th 15th January 2004, Bosch Rexroth in China精密節(jié)流閥 F-510 3114th 15th January 2004, Bosch Rexroth in China雙節(jié)流閥3214th 1

8、5th January 2004, Bosch Rexroth in China調(diào)速閥:原理:節(jié)流調(diào)速: 與負(fù)載有關(guān), 期望達(dá)到與負(fù)載無關(guān)的效果, 即: 如何使 p 保持恒定! 3314th 15th January 2004, Bosch Rexroth in China結(jié)構(gòu)舉例：3414th 15th January 2004, Bosch Rexroth in China結(jié)構(gòu)舉例：3514th 15th January 2004, Bosch Rexroth in China應(yīng)用舉例：3614th 15th January 2004, Bosch Rexroth in China啟動(dòng)沖擊：油液壓縮量啟動(dòng)沖擊后果： 刀具折斷 系統(tǒng)沖擊起始階段的“啟動(dòng)階躍”問題：由于其中的定差減壓閥為常開，所以，突然啟動(dòng)時(shí)，全壓差作用于全開 的閥口；從而引起“啟動(dòng)階躍”效應(yīng)；另外，負(fù)載階躍變化時(shí)，由于定差減壓閥響應(yīng)滯后，對(duì)于性能較差的元件也會(huì)產(chǎn)生類似現(xiàn)象！ 改善辦法：利用閥上預(yù)留的外接平衡孔。（見回路圖舉例）3714th 15th January 2