主营:REXROTH电磁阀,ATOS比例阀,PARKER柱塞泵,DUPLOMATIC齿轮泵,VICKERS叶片泵,BENTLY传感器,AIRTEC机械阀,AVENTICS气动阀
所在地:
上海 上海
产品价格:
电议
最小起订:
3
发布时间:
2024-11-16
有效期至:
2024-12-16
DBW30B2-5X/315-6EG24N9K4液压机械溢流阀 德国博世力士乐REXROTH溢流阀
溢流阀是压力控制阀。其作用主要是控制系统压力,以保护油泵和油路系统的安全及保持油路系统的压力恒定。通经为8毫米的溢流阀是一个小型的直接动作的溢流阀,可以和主溢流阀的遥控口连接,对主溢流阀实现远程压力调节。溢流阀的遥控口经换向阀和油箱连接时,可使油路卸荷。此时溢流阀起卸荷作用。溢流阀的遥控口串联换向阀和通经为8毫米的溢流阀时,可实现压力的多级控制。更换溢流阀的调节弹簧,可改变其压力调节范围。手轮顺时针转动时,压力升高。反之压力降低。
溢流阀是一种液压压力控制阀,在液压设备中主要起定压溢流作用,稳压,系统卸荷和安全保护作用。
定压溢流作用:在定量泵节流调节系统中,定量泵提供的是恒定流量。当系统压力加大时,会使流量需求减小。此时溢流阀开启,使多余流量溢回油箱,保证溢流阀进口压力,即泵出口压力恒定(阀口常随压力波动开启)。
稳压作用:溢流阀串联在回油路上,溢流阀产生背压,运动部件平稳性增加。
系统卸荷作用:在溢流阀的遥控口串接溢小流量的电磁阀,当电磁铁通电时,溢流阀的遥控口通油箱,此时液压泵卸荷。溢流阀此时作为卸荷阀使用。
安全保护作用:系统正常工作时,阀门关闭。只有负载超过规定的较限(系统压力超过调定压力)时开启溢流,进行过载保护,使系统压力不再增加(通常使溢流阀的调定压力比系统高工作压力高10%~20%)。
实际应用中一般有:作卸荷阀用,作远程调压阀,作高低压多级控制阀,作顺序阀,用于产生背压(串在回油路上)。
溢流阀一般有两种结构:1、直动型溢流阀 。2、先导式溢流阀。
对溢流阀的主要要求:调压范围大,调压偏差小,压力振摆小,动作灵敏,过载能力大,噪声小。
先导型溢流阀的导阀部分结构尺寸较小,调压弹簧不必很强,因此压力调整比较轻便。但因先导型溢流阀要在先导阀和主阀都动作后才能起控制作用,因此反应不如直动型溢流阀灵敏。
与三节同心结构相比,二节同心结构的特点是:①主阀芯仅与阀套和主阀座有同心度要求,免去了与阀盖的配合,故结构简单,加工和装配方便。②过流面积大,在相同流量的情况下,主阀开启高度小;或者在相同开启高度的情况下,其通流能力大,因此,可做得体积小、重量轻。③主阀芯与阀套可以通用化,便于批量生产。
溢流阀在装配或使用中,由于“O”形密封圈、组合密封圈的损坏,或者安装螺钉、管接头的松动,都可能造成不应有的外泄漏。
如果锥阀或主阀芯磨损过大,或者密封面接触不良,还将造成内泄漏过大,甚至影响正常工作。
电磁溢流阀常见的故障有先导电磁阀工作失灵、主阀调压失灵和卸荷时的冲击噪声等。后者可通过调节加置的缓冲器来减少或消除。如不带缓冲器,则可在主阀溢流口加一背压阀。(压力一 般调至5kgf/cm2左右,即0.5MPa)。
溢流阀型号
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R900597762 DBW30B2-5X/315-6AW220-50NZ4
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R900501899 DBW30B2-5X/315-6AW220-50NZ5LV
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R900536827 DBW30B2-5X/315-6BW220RNEX
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R901162441 DBW30B2-5X/315-6EW110N9K4B08
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R900911655 DBW30B2-5X/315-6EW110N9K4V
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R901314141 DBW30B2-5X/315-6EW110N9K4V=CSA
R900910899 DBW30B2-5X/315-6EW110N9Z4
R900915150 DBW30B2-5X/315-6EW110N9Z45V/12
R900910900 DBW30B2-5X/315-6EW110N9Z5LV
R900908480 DBW30B2-5X/315-6EW110NZ55L/12
R900949651 DBW30B2-5X/315-6EW127N9K4V
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R900911411 DBW30B2-5X/315-6EW230N9Z4
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R900597130 DBW30B2-5X/315-6SLG24NZ4
R900539938 DBW30B2-5X/315-6SLG24NZ5L
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R900921505 DBW30B2-5X/315-6SMG24N9K4
R900546650 DBW30B2-5X/315-6SMG24N9Z4
R900951432 DBW30B2-5X/315-6SMG48N9K4
R900902906 DBW30B2-5X/315-6SMG48N9Z5L/12
先导型溢流阀的导阀部分是一个易振部位所示。在高压情况下溢流时,导阀的轴向开口很小,仅0.003~0.006厘米。过流面积很小,流速很高,可达200米/秒,易引起压力分布不均匀,使锥阀径向力不平衡而产生振动。另外锥阀和锥阀座加工时产生的椭圆度、导阀口的脏物粘住及调压弹簧变形等,也会引起锥阀的振动。所以一般认为导阀是发生噪声的振源部位。由于有弹性元件(弹簧)和运动质量(锥阀)的存在,构成了一个产生振荡的条件,而导阀前腔又起了一个共振腔的作用,所以锥阀发生振动后易引起整个阀的共振而发出噪声,发生噪声时一般多伴随有剧烈的压力跳动。
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何洋 (联系时请告诉我是"铝道网看到的 信息,会有优惠哦!谢谢!)
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上海市浦东新区新金桥路金豫路100号禹洲金桥国际2期2号楼1118室