?T6D?042?1R02?B1

武穴黎翔機電設備有限公司，詢價聯(lián)系人：何女士

詢價電話：0713-6542758，手機：18934630908????

詢價傳真：0713-6542758

詢價QQ:?736567721,704552157

現(xiàn)貨特價型號：R900925687?4WRAE10W1-30-22/G24N9K31/F1V??2臺

0811402141?DBETBEX-1X/315G24K31F1M?????2臺

流量控制閥?利用調(diào)節(jié)閥芯和閥體間的節(jié)流口面積和它所產(chǎn)生的局部阻力對流量進行調(diào)節(jié)，從而控制執(zhí)行元件的運動速度。流量控制閥按用途分為?5種。(1)節(jié)流閥：在調(diào)定節(jié)流口面積后，能使載荷壓力變化不大和運動均勻性要求不高的執(zhí)行元件的運動速度基本上保持穩(wěn)定。(2)調(diào)速閥：在載荷壓力變化時能保持節(jié)流閥的進出口壓差為定值。這樣，在節(jié)流口面積調(diào)定以后，不論載荷壓力如何變化，調(diào)速閥都能保持通過節(jié)流閥的流量不變，從而使執(zhí)行元件的運動速度穩(wěn)定。(3)分流閥：不論載荷大小，能使同一油源的兩個執(zhí)行元件得到相等流量的為等量分流閥或同步閥；得到按比例分配流量的為比例分流閥。(4)集流閥：作用與分流閥相反，使流入集流閥的流量按比例分配。(5)分流集流閥：兼具分流閥和集流閥兩種功能。

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?工作油液的腐蝕性，包括對密封元件的腐蝕性及對金屬零件的腐蝕性。

????液壓閥及其他所有液壓元件和系統(tǒng)所用的密封件，都是為了防止油液不應有的外泄漏。密封材料的選擇，根據(jù)所用工作油液的不同而應有所不同。如采用丁晴橡膠材料的密封件，用礦物油型油液就能很好適應，而用磷酸酯抗燃液壓油時，就會使密封件受到腐蝕。腐蝕現(xiàn)象有二種情況；一是使密封材料產(chǎn)生溶脹，軟化，二是使密封材料硬化。其結果都使密封件失去密封性能，造成大量外泄漏，使液壓系統(tǒng)效率降低，甚至發(fā)生故障不能工作。

????液壓閥及所有液壓元件的高精度和高光潔度的金屬零件，在長期工作中，由于水分與空氣的共同作用，將會發(fā)生銹蝕。銹蝕掉的顆粒隨油液循環(huán)，進一步造成零件的磨損，并加快零件的氧化，以至損壞元件，嚴重影響液壓系統(tǒng)的正常工作。

????為此，工作油液應含有各種防腐劑，以使其有足夠的防腐性能。

????(四)良好的消泡性能

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????由于溢流閥溢油口的急速溢油以及系統(tǒng)回油管道的回油沖入油池，都可能使油液產(chǎn)生氣泡，混入空氣。這將造成執(zhí)行機構運動的不平穩(wěn)，甚至引起振動和噪聲。

????另外，由于空氣的混入，在高壓下使空氣溶解到油液中；在負壓下空氣又從油液中析出，使油液的體積變化很大。這對系統(tǒng)工作壓力變化很大的高壓液壓系統(tǒng)，或控制精度要求很高的液壓伺服系統(tǒng)，將會造成工作的不平穩(wěn)和動力傳遞的滯后現(xiàn)象，影響執(zhí)行機構工作的可靠性和準確性。

????因此，要求油液中含有有效的消泡劑，使其有良好的消除汽泡、釋放空氣的性能。

????(五)良好的抗乳化性能

????液壓系統(tǒng)由于管道維護不善等原因，使冷卻水、冷凝水混入油液中，生成乳化液，引起油液變質(zhì)，降低了油液的潤滑性和防銹性，使元件的滑動部位產(chǎn)生早期磨損，影響元件的使用壽命，也影響了油液的使用壽命。因此，要求油液對水有良好的分離性能，提高其抗乳化特性。

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024-76382-000S?T6E?057?1L00?A1

054-35046-000S?T6E?057?1L00?A1?M535046

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024-90500-000S?T6E?057?1R00?A1

024-90500-003S?T6E?057?1R03?A1

024-01177-000S?T6E?062?1L00?A1

054-35656-000S?T6E?062?1L00?A1?M535656

024-01177-001S?T6E?062?1L01?A1

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024-00778-000S?T6E?062?1R00?A1

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024-44566-000S?T6E?072?2R00?A1

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