上海寶山力薦BOSCH4WE6Y6X/EG12N9K4柱塞泵,優(yōu)質(zhì)德產(chǎn)Rexroth4WE6Y6X/EG12N9K4柱塞泵 R900950286 H-4WEH32J6X/6EG24N9ETS2K4/B10D3 R900951655 4WEH10J4X/6EG24N9TS2K4 R900951728 4W 上海寶山力薦BOSCH4WE6Y6X/EG12N9K4柱塞泵,優(yōu)質(zhì)德產(chǎn)Rexroth柱塞泵
上海寶山力薦BOSCH4WE6Y6X/EG12N9K4柱塞泵,優(yōu)質(zhì)德產(chǎn)Rexroth4WE6Y6X/EG12N9K4柱塞泵
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上海寶山力薦BOSCH4WE6Y6X/EG12N9K4柱塞泵,優(yōu)質(zhì)德產(chǎn)Rexroth4WE6Y6X/EG12N9K4柱塞泵
力士樂(lè)Rexroth柱塞泵殼變量殼體中的通油孔通過(guò)單向閥進(jìn)入變量殼體的下腔,當(dāng)拉桿向下運(yùn)動(dòng)時(shí),推動(dòng)伺服活塞向下移動(dòng),伺服閥的上閥口打開(kāi),變量殼體下腔的壓力油經(jīng)變量活塞中的通油孔進(jìn)入變量殼體上腔,由于上腔面積大于下腔,液壓力推動(dòng)活塞向下運(yùn)動(dòng),帶動(dòng)銷(xiāo)軸使變量頭繞鋼球中心旋轉(zhuǎn),改變變量頭的傾斜角(增大),柱塞泵的流量隨之增大。反之拉桿向上運(yùn)動(dòng),變量頭的傾斜角向相反方向變化,泵的流量也隨之變化。當(dāng)傾斜角度變至零以后,則變量頭向負(fù)偏角方向變化,液流產(chǎn)生換向,泵的進(jìn)出油口變換。
力士樂(lè)Rexroth柱塞泵過(guò)度發(fā)熱有兩個(gè)原因,一是機(jī)械摩擦生熱。由于運(yùn)動(dòng)表面處于干摩擦或半干摩擦狀態(tài),運(yùn)動(dòng)部件相互摩擦生熱。二是液體摩擦生熱。高壓油通過(guò)各種縫隙泄漏到低壓腔,大量的液壓能損失轉(zhuǎn)為熱能。所以正確選擇運(yùn)動(dòng)部件之間的間隙、油箱容積和冷卻器,可以杜絕泵的過(guò)度發(fā)熱和油溫過(guò)高的現(xiàn)象。另外,回油過(guò)濾器堵塞造成回油背壓過(guò)高,也會(huì)引起油溫過(guò)高和泵體過(guò)熱。
力士樂(lè)Rexroth柱塞泵漏油主要有以下原因:(1)主軸油封損壞或軸有缺陷、劃痕;(2)內(nèi)部泄漏過(guò)大,造成油封處壓力增大,而將油封損傷或沖出;(3)泄油管過(guò)細(xì)過(guò)長(zhǎng),使密封處漏油;(4)泵的外接油管松動(dòng),管接頭損傷,密封墊老化或產(chǎn)生裂紋;(5)變量調(diào)節(jié)機(jī)構(gòu)螺栓松動(dòng),密封破損;(6)鑄鐵泵殼有砂眼或焊接不良。
上海寶山力薦BOSCH4WE6Y6X/EG12N9K4柱塞泵,優(yōu)質(zhì)德產(chǎn)Rexroth4WE6Y6X/EG12N9K4柱塞泵