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二手挖掘机在选购时要注意什么?

文章作者:必赢亚州官网 发布日期:2020-12-09   来源:www.bluewebcreative.com
1、检查铲斗和动臂
1. Check the bucket and boom
挖掘机并不总是作为一种挖掘机械,施工者有时用他们来打桩或者用他们来铺设管道。因此,用户需要注意铲斗的情况,确保打桩、破碎和行走装置有没有问题。还有一个重要的部分是铲斗油缸连接销轴、衬套,一定要对这些地方的松紧进行检查。很多问题都是由于疏于维护和检查而产生的。另一个关键点要仔细查看后臂与挖掘机连接的部分,如果后臂下方的连接磨损过度,有可能导致损失整台设备的价值。
Excavators are not always used as digging machines; builders sometimes use them to pile piles or to lay pipes. Therefore, users need to pay attention to the condition of the bucket to ensure that there are no problems with the piling, crushing and walking devices. There is also an important part of the bucket cylinder connecting pin, bushing, must check the tightness of these places. Many problems are caused by careless maintenance and inspection. Another key point is to carefully check the connection between the rear arm and the excavator. If the connection under the rear arm is worn excessively, it may lead to the loss of the value of the whole equipment.
2、检查液压油缸和油管
2. Check the hydraulic cylinder and oil pipe
漏油意味着有可能整个油路被污染检查液压油缸和油管非常重要。更好的情况是液压油缸镀铬的表面没有擦伤、凹痕或者漏油的痕迹。如果有液压油渗出来,可能灰尘已经污染了液压系统。同样要确认油缸壁没有被损坏或者有凹痕。油缸和缸壁之间的缝隙很小,只要管道中有一个杂物,就会导致油缸在运行中由于磨损而产生大量的金属屑,并残留到液压系统中。
Oil leakage means that the whole oil circuit may be contaminated. It is very important to check the hydraulic cylinder and oil pipe. The best case is that there is no scratch, dent or oil leakage on the chrome plated surface of the hydraulic cylinder. If there is hydraulic oil leakage, the dust may have contaminated the hydraulic system. Also make sure that the cylinder wall is not damaged or dented. The gap between the oil cylinder and the cylinder wall is very small. As long as there is a debris in the pipeline, a large amount of metal chips will be produced due to the wear of the oil cylinder during the operation, which will remain in the hydraulic system.
3、注意车身焊接处
3. Pay attention to the body welds
仔细查看挖掘机上有没有裂纹以及非原制造时留下的焊接痕迹,这些东西说明机器已经被过度的使用了。还有一个好方法,就是用一块直板放在后臂和斗杆的位置上,来看看有没有错位或扭曲。要特别注意多余的钢板修复,二手挖掘机上可能会有一些擦痕和凹痕,但机器上如果有太多的补丁时可能意味着这台设备已经用了很长时间了。
Take a closer look at the excavator for cracks and weld marks not originally made, which indicate that the machine has been overused. Another good way is to use a straight board on the position of the rear arm and the stick to see if there is any dislocation or distortion. Pay special attention to the repair of redundant steel plates. There may be some scratches and dents on the used excavator, but if there are too many patches on the machine, it may mean that the equipment has been used for a long time.
4、检查橡胶履带和底盘
4. Check rubber track and chassis
小型挖掘机上的橡胶履带同大型机器上的钢制履带不同,它适用在草地和车道上。很多时候用户不会像检查钢制履带那样,近距离地检查橡胶履带的磨损。结果只看到橡胶履带的磨损,而没有看到链轮和托轮上大量的磨损,可以通过检查橡胶履带上的裂纹和边沿的磨损情况来估计其使用情况,就像看轮胎磨损时注意轮胎纹路一样。
Rubber track on small excavator is different from steel track on large machine. It is suitable for grass and driveway. Most of the time, the user will not check the rubber track wear closely like checking the steel track. As a result, only the wear of rubber track is seen, but a lot of wear on sprocket and supporting roller is not seen. The use of rubber track can be estimated by checking the cracks and edge wear of rubber track, just like paying attention to tire lines when looking at tire wear.
由于使用方式和土壤情况的不同,橡胶履带的工作寿命也有很大差异。一般来看,它的平均寿命为2000个小时左右。但是如果在有岩石或易磨损的环境中工作,这时的使用寿命就要减半。反之,在比较好的环境里作业寿命也会相应的加倍。
Due to the different usage and soil conditions, the working life of rubber track is also very different. Generally speaking, its average life span is about 2000 hours. But if you work in an environment with rocks or easy to wear, the service life will be halved. On the contrary, in a better environment, the working life will be doubled accordingly.
长臂挖掘机租赁
用户检查履带和底盘的时候,别忘了再开车检查一下机油水平和清洁度。这部分是很容易被忽视的,并且通常会剩下很少的油。如果油量本来已经很低,而有水或其他东西进入,那就会产生更大的麻烦。
When users check the track and chassis, don't forget to drive to check the oil level and cleanliness. This part is easy to ignore and usually leaves little oil. If the amount of oil is already very low, and water or other things enter, it will cause more trouble.
5、开车操作检查
5. Start up operation inspection
发动机预热启动后,倾斜机器使之仅靠一侧的履带站立,依次轮换两侧的履带进行站立。注意在30秒或60秒内可以完成多少次这样的动作,然后同其他的履带进行对比。挖掘机的履带行走装置是一个内置的流量表,如果二者没有同样的流量,那么就存在问题了。
After the engine is warmed up and started, tilt the machine so that it can stand only on one side of the track, and rotate the tracks on both sides to stand in turn. Notice how many times you can do this in 30 seconds or 60 seconds, and then compare it with other tracks. The crawler walking device of excavator is a built-in flow meter. If they do not have the same flow rate, there will be problems.
另一种检测的方式是在平地上驾驶挖掘机运行10米,如果运行的是直线,就可以知道其两边行走装置运行状况一样好。同样也要检查回转齿圈和回转轴承。正常情况下,上部可以平顺启动回转并能够准确停车,只有少量或没有偏差。对于小型挖掘机,其回转齿圈和回转轴承应该同机器有一样长的寿命,因此任何关于这个部分的问题都得注意。
Another way of detection is to drive the excavator to run 10 meters on the flat ground. If it runs in a straight line, you can know that the running conditions of the walking devices on both sides are the same. Also check the slewing ring gear and slewing bearing. Under normal conditions, the upper part can start turning smoothly and stop accurately with little or no deviation. For small excavators, the slewing ring gear and slewing bearing should have the same service life as the machine, so any problems about this part should be paid attention to.
6、检查发动机罩盖
6. Check the hood
开车操作检查,应打开发动机罩盖并且检查排气管道是否有冒烟的迹象,可以拔出油尺并查看是否有烟。冒烟太多通常说明需要更换活塞环,而且可能要不了多久发动机就要大修了。
Start up operation inspection, should open the engine cover and check exhaust pipe for signs of smoke, can pull out the dipstick and check whether there is smoke. Too much smoke usually means that the piston rings need to be replaced, and it may not be long before the engine will be overhauled.
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