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【姿势】挖掘机特殊环境下作业注意事项

点上面蓝色字 机器猫关注我


挖掘机特殊环境下作业注意事项如下所示:
(1)上坡和下坡

1)在陡坡上向下行驶时,利用行走操纵杆和油门操纵杆保持较低的行驶速度。在超过15度的斜坡上向上或向下行驶时,斗杆与动臂应保持90~110度的夹角,铲斗背面离地距离为20~30cm,并降低发动机转速。
2)若下坡时要制动,则把行走操纵杆置于中位,这样制动器就会自动起作用。
3)在上坡行走时,若履带板打滑,除了依靠履带板的驱动力行驶上坡外,还应利用斗杆的拉力帮助机器上坡。
4)若在上坡时发动机熄火,则可将行走操纵杆移至中位,把铲斗降至地面,使机器停止,然后再启动发动机。
5)在斜坡上发动机熄火,禁止进行回转操作,防止上部结构在其自重作用下回转。
6)若机器停在斜坡上,则不要打开驾驶室门,这样容易引起操作力的突然变化,驾驶室门应始终关闭。
7)在斜坡上行走时,不要改变行走方向,否则会导致机器倾翻或滑动。如果必须要在斜坡上改变行走方向,则应在较平缓的坚固的斜坡上操作。
8)避免横越斜坡,因为这样可能导致机器滑动。
9)当在斜坡上工作时,不要进行回转,因为这样容易使机器因失去平衡而倾翻、滑动。应在低速时小心地进行回转和操作动臂。


(2)在泥水中和松软的地面上作业
1)如果河床是平的而水流速度缓慢,则在水中的操作深度应在托链轮的中心线以下。如果河床的状况不佳而水流速度快,则一定要注意,不要使水或砂石侵入回转支承机构、回转小齿轮、中央回转接头等。如果水或砂石侵入回转大轴承、回转小齿轮、大齿圈及中央回转接头,则应立刻更换润滑脂或回转大轴承,要暂停作业并及时修理。
2)在松软的地面上作业时,地面可能会一点一点地陷落,作业时要随时注意机体下部的情况。
3)在松软的地面上作业时,应注意不要超过机器的下陷深度。
4)当单侧履带陷入泥水中时,可利用动臂、斗杆和铲斗抬起履带,然后垫上木板或圆木,让机器驶出。如有必要,则在铲背下面也垫一块木板。在使用工作装置抬起机器时,动臂和斗杆间夹角应为90~110度,应始终使铲斗底部与泥水地面接触。
5)当两侧履带都陷入泥水中时,应按上述方法垫放木板,把铲斗锚人地中(铲斗的斗齿插入地中),然后拉回斗杆,同时把行走操纵杆置于前进位置,拉出挖掘机。
6)如果机器陷在泥水中,并且无法靠自己的力量脱离时,应用有足够强度的钢索牢牢地拴在机体的行走架上,在钢索和行走架间放置厚木板,以免损坏钢索和机体,然后用另一台机器向上拖拉。行走架上的孔是用来牵引较轻的物体的,千万不能用来拉重物,否则孔会破裂,造成危险。
7)在泥水中作业时,若工作装置连接销浸在水中,则每次完工后都要加润滑脂。对重载作业或深度挖掘作业,每次作业前都要给工作装置连续销加润滑脂。每次加润滑脂后,操作动臂、斗杆和铲斗数次,然后再加润滑脂,直到将旧润滑脂挤出为止。


(3)在海滨地区作业
在操作之前应检查螺塞、放水阀和各盖子是否松动,若松动则拧紧。必要时,在电气设备里面加适量油脂,防止设备锈蚀。操作后要彻底清洗整个机器,以除去盐分,必要时在需要的地方加润滑脂或润滑油,以避免锈蚀。


(4)在多尘地区作业
1)要经常检查并清洗空气滤芯,必要时予以更换。
2)经常检查水箱中水质污染情况,缩短清洗水箱的时间间隔,以防内部被杂质堵塞,影响发动机及液压系统散热。
3)添加柴油时要小心,不要让杂质混入柴油中,而且要在适当的时间检查柴油滤芯,必要时予以更换。
4)应在适当的时候清洁启动电机和发电机,以免累积灰尘。


(5)在寒冷的冬天作业
当温度特别低时,各种油液的黏度增大,发动机启动会变得困难,而且若冷却液冻结,还会损害发动机和水箱。
1)换用黏度低的柴油、润滑油和液压油。
2)在寒冷的冬天使用机器时,加到冷却系统中的防冻液的比例应为最低温度时的比例。禁止使用甲醇、乙醇或丙醇基的防冻液。无论是单独使用,还是与防冻剂混合使用,一定要避免使用防漏水剂。不能把一种防冻液与另一种不同牌号的防冻液混合使用。对于永久型防冻液,一年之内不需要更换。若没有永久型防冻液,则在冬季仅允许使用无抗腐蚀剂的乙二醇防冻液。在这种情况下,每年(在春季或秋季)应清洗冷却系统2次,仅在秋季加防冻液,在春季不再加防冻液。
3)温度降低后,蓄电池充电的能力会降低并可能结冰,应盖上蓄电池或者把它从机器上卸下,放在温暖的地方,第二天作业前再装上。若发现蓄电池电解液液位太低,则应在第二天早上工作前加蒸馏水,不要在当天完工后加水,以防止晚上结冰。
4)为防止因泥和水结冰使第二天早上机器不能开动,必须彻底清除机体上的泥和水,避免泥或脏物随水滴进密封圈,损坏密封装置。
5)将液压缸的活塞杆缩回到液压缸筒内,避免泥土和水粘在活塞杆上,损害液压缸密封圈。
6)把机器停在坚硬、干燥的地面上。若没有条件,可把机器停在木板上,第二天开走。
7)打开放水阀,放掉聚集在燃油系统中的水,防止冻结。
8)机器在泥水中作业后,必须按下述方法清除车上的泥水:发动机低速运转,将上部装置回转90度,使工作装置转到履带侧面;将工作装置慢慢地压向地面,使履带轻轻浮起,让履带空转,清除上面的泥水,另一侧履带也按此办法清除泥水。
9)由于电气设备对于水汽特别敏感,所以在洗车或遇到雨雪时应避免电气设备接触水汽。由于控制器、监测器等电气元件都安装在驾驶室中,所以绝不能让雪水侵入驾驶室内。

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