限位器的使用方法

升降机的限位器怎么用一个控制吊兰的到位停止情况啊
2025-04-05 13:28:05
推荐回答(4个)
回答(1):

当施工升降机吊笼向上运行时,行程开关上的小滚轮处于凸凹式拉条的凹点——通电位置。当升降机出现机械故障或操作者误操作时,吊笼一直上升至极限高度,即起升高度限位器设定高度处,由于吊笼横梁牵动细钢丝绳及凸凹式拉条。

同时,行程开关上的小滚轮因受外力作用上移至凸凹式拉条的凸处,小滚轮从口点通电位置移动到凸点,使行程开关断电,切断上行电源,卷扬机电动机停止运转,使吊笼停止运行。手动起升高度限位器的凸凹式拉条,使行程开关上的小滚轮从凸点复位至凹点通电位置,即可使吊笼启动。



扩展资料

在开关门过程中限位器盖板内的滑块在主臂上往复运动,因为主臂在运动轨迹方向上的厚度不同,滑块的位移距离也不同,挤压橡胶块的力也有差别,所以在开关门过程当中就会产生不同的开关门力,从而起到限位的效果。

吊钩高度限位器又称吊钩行程开关,装设部位随起重臂结构形式而异。俯仰变幅动臂的吊钩高度限位器由碰杆、杠杆、弹簧及行程开关或终点开关等组成,多固定于吊臂端头或悬吊于臂头。

当吊钩滑轮起升到极限位置,滑轮夹套托住重锤和拉杆,由于弹簧销轴压迫行程开关的触头,起升机构的电源便被切断。吊钩高度限制器因动作失灵或触点磨损量超标,不能可靠地断电时应报废。

参考资料来源:百度百科-限位器

参考资料来源:百度百科-高度限位器

回答(2):

限位器主要分为三种,
(1)
起重机限位器,主要作用是保证塔吊起重机起重时不超重,确保塔吊起重安全。
(2)力矩限制器,主要作用通过力矩限制器保护起重重量的每个点不超重

(3)变幅限制器 保证变幅小车在行驶中,相应的根据变幅进行调节
限制器构造及功能
(1)起重量限制器功能:
起重量限制器安装在起重臂的根部,通过调整行程开关的碰块限制慢速和中速起吊时的重物不超过塔机允许的最大起重量,高速为空钩下速度,吊重时不得大于最大起重量的40%,即1.2T,如超过1.2T将自动转为中速。
(2)起重力矩限制器功能:
起重力矩限制器安装在起重臂一侧的塔帽主弦杆上,起重力矩使限制器的弓形板变形,碰触限位开关的触头,保护起吊物品所产生的力矩(重量
幅度)不得超过塔机所允许的起重力矩,其功能是90%额定力矩予警,和分别按起重量和幅度调整的在力矩达到额定力矩但小于其110%分别
警,同时切断起升机构起升电源和变幅机构向外变幅的电源,使起吊物只能下降,不能上升,使小车只能向幅度小的方向运行,不能向幅度大的方向运行。
(3)变幅限位器功能:
安装在变幅机构的卷筒轴上,限制最大、最小幅度,使变幅小车在行驶到最小幅度或最大幅度时,切断变幅机构相应方向的工作电源,以保护其安全运行。

限位器就相当于一个开关,只不过它不是由人来控制的,它就接在控制电路中,它是控制交流接触器的,当吊兰触碰限位器时就相当于是开路,交流接触器失电,电机就停止了!

回答(3):

限位器就相当于一个开关,只不过它不是由人来控制的,它就接在控制电路中,它是控制交流接触器的,当吊兰触碰限位器时就相当于是开路,交流接触器失电,电机就停止了!

回答(4):

当吊兰到需要停止的位置会触动限位器,切断上升/下降控制电路,吊兰就会停止了

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