原装Rexroth溢流阀DBDH20K1X/50
原装Rexroth溢流阀DBDH20K1X/50
溢流阀的注意事项
噪声和振动
液压装置中容易产生噪声的元件一般认为是泵和阀，阀中又以溢流阀和电磁换向阀等为主。产生噪声的因素很多。溢流阀的噪声有流速声和机械声二种。流速声中主要由油液振动、空穴以及液压冲击等原因产生的噪声。机械声中主要由阀中零件的撞击和磨擦等原因产生的噪声。
（1）压力不均匀引起的噪声
先导型溢流阀的导阀部分是一个易振部位如图3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。
（2）空穴产生的噪声
当由于各种原因，空气被吸入油液中，或者在油液压力低于大气压时，溶解在油液中的部分空气就会析出形成气泡，这些气泡在低压区时体积较大，当随油液流到高压区时，受到压缩，体积突然变小或气泡消失；反之，如在高压区时体积本来较小，而当流到低压区时，体积突然增大，油中气泡体积这种改变的现象。气泡体积的突然改变会产生噪声，又由于这一过程发生在瞬间，将引起局部液压冲击而产生振动。先导式溢流阀的导阀口和主阀口，油液流速和压力的变化很大，很容易出现空穴现象，由此而产生噪声和振动。
（3）液压冲击产生的噪声
先导式溢流阀在卸荷时，会因液压回路的压力急骤下降而发生压力冲击噪声。愈是高压大容量的工作条件，这种冲击噪声愈大，这是由于溢流阀的卸荷时间很短而产生液压冲击所致在卸荷时，由于油流速急剧变化，引起压力突变，造成压力波的冲击。压力波是一个小的冲击波，本身产生的噪声很小，但随油液传到系统中，如果同任何一个机械零件发生共振，就可能加大振动和增强噪声。所以在发生液压冲击噪声时，一般多伴有系统振 动。
（4）机械噪声
先导式溢流阀发出的机械噪声，一般来自零件的撞击和由于加工误差等产生的零件磨擦。
在先导型溢流阀发出的噪声中，有时会有机械性的高频振动声，一般称它为自激振动声。这是主阀和导阀因高频振动而发生的声音。它的发生率与回油管道的配置、流量、压力、油温（粘度）等因素有关。一般情况下，管道口径小、流量少、压力高、油液粘度低，自激振动发生率就高。
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R900307933 MHDBD22P2-1X/420V-011
R900307541 VENTILSITZW-DBD.20K-1X/*BG
R900306858 VENTILSITZDBD.6K1X/*WASSER*BG
R900305244 GEHAEUSEDBD.30G1X/BG
R900305241 GEHAEUSEDBD.25G1X/BG
R900305239 GEHAEUSEDBD.20P1X/
R900305236 GEHAEUSEDBD.20G1X/
R900305231 GEHAEUSEDBD.10P1X/
R900305228 GEHAEUSEDBD.10G1X/
R900305226 GEHAEUSEDBD.6P1X/
R900305223 GEHAEUSEDBD.8G13/
R900305220 GEHAEUSEDBD.6G1X/
R900304191 MHDBD16P2-1X/050-015M
R900303895 MHDBD16P2-1X/315M
R900303354 MHDBD22P2-1X/420M
R900302906 MHDBD16P2-1X/420M
R900302862 MHDBD16P2-1X/315V-011
R900300124 VERSTELLUNGDBDS30K13/
R900300122 VERSTELLUNGDBDA20K13/V
R900300119 VERSTELLUNGDBDA20K13/
R900300117 VERSTELLUNGDBDH20K13/
R900300113 VERSTELLUNGDBDA10K13/
R900300112 VERSTELLUNGDBDS10K13/
R900300111 VERSTELLUNGDBDH10K13/
R900300107 VERSTELLUNGDBDA6K13/
R900300106 VERSTELLUNGDBDS6K13/
R900300105 VERSTELLUNGDBDH6K13/
R900305874 VERSCHLUSSSCHRAUBEDBD.6K10/NBR*BG
R900305836 MHDBD22P2-1X/200M
R900305835 MHDBD16P2-1X/200M
R900305702 HSZ06/DBD6A-T
R900305448 MHDBD16P2-1X/420M-011
R900305447 MHDBD22P2-1X/420M-011
R900248925 W-DBDS10G1X/400
R900248775 DBDS30K1X/315SO129
R900247260 DBDH6G1X/100VSO102
R900244973 DBDS20P1X/200-180
R900243276 W-DBDS10K1X=315P210V
R900242903 DBDS2K2X/200-150
R900241882 DBDS6K1X/200-130
R900230312 DBDS6K1X/50JSO60
R900230311 DBDS2K2X/100-060
R900230310 DBDS20K1X/100-080
R900229542 RING26,4/31,6X2,1DBD.10K18/400
R900227371 DBDS10K1X/315VSO60
R900225235 DBDS20K1X/400-330
R900225117 DBDS6K1X/315P200
R900224724 DBDS20K1X/200-200
R900224220 DBDS10K1X/400-350
R900220903 DBDS20K1X/315P315
R900219731 DBDS10K1X/630VSO151
R900219050 DBDS10K1X/315-260
R900219049 DBDS10K1X/630-440
R900218433 DBDS30K1X/200P180
R900216091 DBDS6K1X/400-350
R900215388 DBDS10K1X/315P315
公司主营产品
液压元件
博世力士乐Rexroth工业液压——迪普马DUPLOMATIC液压元件——阿托斯ATOS液压元件——伊顿威格士液压
气动元件
派克parker汉尼汾——油研YUKEN液压——爱尔泰克AIRTEC气动——ASCO世格气动——安沃驰AVENTICS气动
工控电气
贝加莱B&R工业备件——美国本特利BENTLY——西门子SIEMENS工控备件
所供产品原厂原装，如有需要欢迎来电咨询。
上海韦米机电设备有限公司提供原装Rexroth溢流阀DBDH20K1X/50,包括力士乐溢流阀,Rexroth单向阀,Rexroth插装阀,力士乐伺服阀的详细产品价格、产品图片等产品介绍信息。
