船舶液压系统配件力士乐REXROTH安全阀DBDS6K1X/400溢流阀现货库存

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船舶液压系统配件力士乐REXROTH安全阀DBDS6K1X/400溢流阀现货库存,上海韦米机电设备有限公司供应产品,销售热线:13524123009,在线QQ:2896079243,传真:021-51334670;联系人:雷青。产品图片实拍,价格货期快速报价,大量产品现货供应,价格优惠;热诚欢迎新老客户咨询下单!

力士乐溢流阀

力士乐溢流阀

力士乐安全阀

力士乐安全阀


力士乐限压阀,直接控制DBD系列
规格 6 … 30
组件系列 1X
大工作压力 630 bar
大流量 350 l/min
用作拧入式插装阀(插件)
用于螺纹连接
用于底板安装
压力调节的调整类型,可选:
-六角套筒和保护帽
-旋钮
-手轮
-可锁定旋钮
防腐蚀设计
DBD 型溢流阀是一种直动式座阀。这些阀用于限制系统压力。
这些阀门主要由下列组件组成:套筒、弹簧、带有衰减柱塞的阀心(压力等级 25 bar … 400 bar)或滚珠(压力等级 630 bar)及调整类型。可使用调整类型 对系统压力进行无级调节。弹簧将阀心或滚珠推到阀座上。通道P连接到系统。系统中存在的压力将作用于阀心表面(或滚珠)。如果通道P中的压力超过弹簧 上设定的值,则阀心或滚珠背向弹簧 打开。此时,液压油从通道P流入通道T。阀心的行程受压花的限制。
为了在整个压力范围内实现良好的压力调节,整个压力范围已被分成了 7 个压力等级。一个压力等级对应于一个特定弹簧可设定的大工作压力。
注意:
调整类型 经过特别建构,可防止其丢失。得益于万向架的设计,调整类型 中的调节元件在完全卸载后会保持松动(可移动)状态。
压力等级“25”:尽管调整类型处于完全卸载状态,但若未确定小压力,则调节元件仍会在较小的弹簧力和/或回复力作用下“回到”停止状态。
在经过压力调节/提升后,可将调节元件再次拧入。


溢流阀的应用场合
1、起稳压和溢流作用(阀口常开)
在定量泵进油或回油节流调速系统中
2、起安全保护作用(阀口常闭)
变量泵液压系统、定量泵旁路节流调速系统和非节流调速系统。
3、起卸荷作用
4、作背压阀使用
5、作吸收换向冲击使用
6、可实现多级调压和远程调压


压力控制阀:
利用节流降压原理,通过作用在阀芯一端的弹簧力与另一端的液压力相平衡而工作的。
溢流阀
溢流阀是通过阀口的溢流,调定系统工作压力或限定其最大工作压力,防止系统过载。
几乎在所有的液压系统中都需要用到它,其性能好坏对整个液压系统的正常工作有很大影响。
按结构形式和基本动作方式分为:直动式溢流阀,先导式溢流阀
直动式溢流阀
直动式溢流阀是依靠系统中的压力油直接作用在阀芯上,与弹簧力等相平衡,以控制阀芯的启闭动作。
压力油从P口进入,经阻尼孔作用在阀芯底部,当作用在阀芯上的液压力大于弹簧力时,阀口打开,使油液溢流。
先导式溢流阀结构
由先导阀和主阀组成。
先导阀实际上是一个小流量直动型溢流阀,其阀芯为锥阀。进口压力值主要由先导阀调压弹簧的预压缩量确定。
主阀芯上有一阻尼孔,且上腔作用面积略大于下腔作用面积,其弹簧只在阀口关闭时起复位作用。
先导式溢流阀工作原理
主阀芯开启是利用液流流经阻尼孔形成的压力差。阻尼孔一般为细长孔,孔径很小币=0.8~1.2mm,孔长1=8~12mm,因此工作时易堵塞,一旦堵塞则导致主阀口常开无法调压。
先导阀前腔有一控制口,用于卸荷和遥控。
溢流阀入口处的压力随阀口溢流量变化而恒定的程度,是衡量溢流阀静特性好坏的重要指标。
实际上,溢流阀工作时开口量是变化的,开口量的变化引起溢流量变化,亦必然引起压力的变化。压力越高,所需弹簧刚度就越大,因而,溢流量变化时压力的变化就越大。
先导式溢流阀的定压精度高,静特性较直动型的好。
当溢流阀的调定压力为p时,直动式的溢流量(损失)较先导式的大,即q直>q先;
当溢流阀的溢流量变化△q 时,直动式的进口压力变化大(定压性差),即△p直>△p先。
调压螺母时,直动式溢流阀的弹簧变形力较大,调压费力,所以直动式溢流阀适用于低压、小流量、且对于压力稳定性要求不高的系统。
先导式溢流阀由先导阀与主阀两部分组成,阀芯另一端作用的压力是由先导阀调节的,而先导阀的承压面积很小,且灵敏度很高,所以其弹簧力也不大,调节省力、灵活。
可见先导式溢流阀适用于高压大流量,对压力稳定性要求较高的系统。
溢流阀的作用
溢流调压:在不断的溢流过程中保持系统压力基本不变。
安全保护:亦称安全阀,用于过载保护。
形成背压:接在回油路上,使系统稳定。
液压系统对溢流阀的性能要求:
定压精度高。
灵敏度要高。如溢流调压时,当液压缸突然停止运动时,溢流阀要迅速开大。否则,定量泵输出的油液将因不能及时排出而使系统压力突然升高,并超过溢流阀的调定压力,使系统中各元件及辅助受力增加,影响其寿命。
工作要平稳,且无振动和噪声。
当阀关闭时,密封要好,泄漏要小。
对于经常开启的溢流阀,主要要求前三项性能;而对于安全阀,则主要要求第二和第四两项性能。其实,溢流阀和安全阀都是同一结构的阀,只不过是在不同要求时有不同的作用而已。

德国力士乐REXROTH溢流阀安全阀订货号和型号:
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升船机的基本组成部分包括:承船厢(或承船架、承船车),用于停放船舶;斜坡道或垂直构架,前者供斜面升船机运行,后者为垂直升船机承船厢的支承和导行设备;连接建筑物,设置在上下游引航道与承船厢的连接处,使船舶自承船厢进入引航道或自引航道进入承船厢;机械传动机构,用于启闭承船厢的厢门和驱动承船厢升降;电气控制系统,用于操纵升船机的运行。


船舶设备系指除船舶备件以外的任何用于船上的可移动但不带消费性质的物品。 主要包括 舵设备、锚设备、系泊设备、拖拽设备、起货设备、救生设备、关闭设备、管系、舾装件、舱底水系统、压载系统、日用水系统、消防设备、通风空调制冷设备等等。

起锚机Windlass  起锚机是船舶上的一种大甲板机械,用来收、放锚和锚链。起锚机通常安装在船舶艉部主甲板上,供舰船起锚,抛锚系缆时用。起锚机通常和绞车配合使用。 起锚机主要由基座、支架、锚链轮、刹车、链轮、变速箱、电控系统(手动起锚机除外)等组成,电动起锚机有电动机,液压起锚机有液压泵站。起锚机是根据船舶的大小和锚和锚链的尺寸来选型。
起锚机按照驱动形式可以分为:手动、电动、液压、气动等。
起锚机按照锚链直径可以分为φ12--φ120mm 等若干种规格。
起锚机按照卷筒分布又可以分为单侧和双侧。
起锚机的主要技术指标包括锚链直径、起锚公称速度、额定载荷、支持负载、几级变速、电制等。  起锚机在船舶上的安装要保证锚链与链轮的包角为117-120度。

船舶必须配置一整套符合规范要求的动力装置和辅助设备后,才能在水上航行.这些动力装置包括有船舶主动力装置、辅助动力装置、蒸汽锅炉、制冷和空调装置、压缩空气装置、船用泵和管路系统、造水装置和自动化系统等.这些机电动力设备主要集中于机舱,专门管理这些设备的技术部门是轮机部.


力士乐REXROTH液压元件应用行业:注塑机、吹塑机、橡胶和发泡机、陶瓷压机、同步折弯机(折板机),、剪板机(剪床)、冲切/步冲、金属压力机、弯曲/锯床、机床、食品机械、皮革/鞋机、木材/造纸机械、钢铁业/铸造、压铸机/挤压机、电厂、生态能源(风能-水力-太阳能)设备、油和天然气工业设备、混凝土泵、路机、钻井/开采设备、起重机、升降机/叉车、推土机、道路,隧道,水坝工程设备、压缩机、街道维修设备、模拟器/娱乐设备、卡车、铁路工程设备、航空工业设备、船舶/航海工业设备、打谷机/喷洒机、拖拉机/收割机。
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