力士樂平衡閥FD32KA21/B06V，上海韋米機(jī)電設(shè)備有限公司主營產(chǎn)品之一，銷售熱線： ；聯(lián)系人：雷青；業(yè)務(wù)QQ：---；手機(jī)微信： ； ；傳真 ；原廠直銷，質(zhì)量保障，現(xiàn)貨庫存，價格優(yōu)惠！

恒流量調(diào)節(jié)閥是以補(bǔ)償方式時行變阻力的動作，它有倆個閥瓣，一個是調(diào)節(jié)閥瓣，用于補(bǔ)償節(jié)流孔前后的差壓，因此可成為“補(bǔ)償式變阻力調(diào)節(jié)閥”其原理是：利用節(jié)流孔前后的差壓，作為補(bǔ)償動作的驅(qū)動力，補(bǔ)償并保持節(jié)流孔前后差壓的穩(wěn)定，從而保持流量的恒定，調(diào)節(jié)節(jié)流孔的大小就可獲得不同的流量。因此，它既可以調(diào)節(jié)流量。也可以在系統(tǒng)水利工況變化時保持流量恒定，在系統(tǒng)中它既可恒定各個支路的流量，實(shí)現(xiàn)流量的均衡輸配，也可以隨時改變和調(diào)節(jié)各支路的流量，實(shí)現(xiàn)動態(tài)平衡。如果每年在初寒到嚴(yán)寒和嚴(yán)寒到末寒是進(jìn)行倆次流量調(diào)節(jié)，即可實(shí)現(xiàn)“分階段改變流量的質(zhì)調(diào)節(jié)”的節(jié)能運(yùn)行方式。恒流量調(diào)節(jié)閥的調(diào)節(jié)簡單方便，但對于較大的系統(tǒng)來說，每年進(jìn)行倆次調(diào)節(jié)仍然是個負(fù)擔(dān)，而且恒流量調(diào)節(jié)閥的價格高，雖然當(dāng)年可以收回，但對用戶仍有較大的心理壓力。

 

流量閥是由一個手動調(diào)節(jié)閥組和一個自動平衡閥組組成。調(diào)節(jié)閥組作用是設(shè)定流量，自動平衡閥組作用是維持流量恒定。系統(tǒng)流體的工作壓力為P1，手動調(diào)節(jié)閥的前后壓力分別為P2、P3。當(dāng)手動調(diào)節(jié)閥調(diào)到某一位置時，即人為確定了“設(shè)定流量”Kv即手動調(diào)節(jié)閥的流量系數(shù)，流量G=Kv（P2-P3），Kv為，Kv設(shè)定后，只要P2－P3不變，則流量G不變。當(dāng)系統(tǒng)流量增大時，(P2—P3)的實(shí)際值超過了允許的給定值，此時通過感壓膜和彈簧作用使自動調(diào)節(jié)閥組自動關(guān)小，直至流量重新維持到設(shè)定流量，反之亦然。
流量閥自動調(diào)節(jié)流量的有效范圍取決于工作彈簧的性能。一般流量閥前后壓差在20—300kPa的范圍內(nèi)能按設(shè)定值有效控制流量。當(dāng)壓小于20kPa時，控制流量達(dá)不到設(shè)定值；壓差超過300kPa時，可能產(chǎn)生噪音。
力士樂平衡閥FD32KA21/B06V
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力士樂平衡閥FD32KA21/B06V

按用途分為五種：
(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(yùn)動均勻性要求不高的執(zhí)行元件的運(yùn)動速度基本上保持穩(wěn)定。節(jié)流閥是通過改變節(jié)流截面或節(jié)流長度以控制流體流量的閥門。將節(jié)流閥和單向閥并聯(lián)則可組合成單向節(jié)流閥。節(jié)流閥和單向節(jié)流閥是簡易的流量控制閥，在定量泵液壓系統(tǒng)中，節(jié)流閥和溢流閥配合，可組成三種節(jié)流調(diào)速系統(tǒng)，即進(jìn)油路節(jié)流調(diào)速系統(tǒng)、回油路節(jié)流調(diào)速系統(tǒng)和旁路節(jié)流調(diào)速系統(tǒng)。節(jié)流閥沒有流量負(fù)反饋功能，不能補(bǔ)償由負(fù)載變化所造成的速度不穩(wěn)定，一般僅用于負(fù)載變化不大或?qū)λ俣确�(wěn)定性要求不高的場合。 
　　(2)調(diào)速閥：調(diào)速閥是進(jìn)行了壓力補(bǔ)償?shù)墓?jié)流閥。它由定差減壓閥和節(jié)流閥串聯(lián)而成。節(jié)流閥前、后的壓力分別引到減壓閥閥芯右、左兩端，當(dāng)負(fù)載壓力增大，于是作用在減壓閥芯左端的液壓力增大，閥芯右移，減壓口加大，壓降減小，使也增大，從而使節(jié)流閥的壓差保持不變；反之亦然。這樣就使調(diào)速閥的流量恒定不變。在載荷壓力變化時能保持節(jié)流閥的進(jìn)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(yùn)動速度穩(wěn)定。
力士樂平衡閥FD32KA21/B06V
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力士樂平衡閥FD32KA21/B06V