2015年12月16日星期三

Three large concrete mixer truck fault analysis

The car also has a life history of each car important new to old, from newborn to phase out, in the process, also like humans, various kinds of "illness", then in the case of concrete mixers upload process to "illness", we how to remedy it? Here are some common failure analysis coat, hoping to help the majority of riders and friends.

For faults, we must first pay attention to understand the nature of the fault appears: a sudden or gradual? Is a new car or fails to appear for a period of time? How long age of the vehicle? Are there laws fault? Overloading and empty car Symptom whether to change? High speed and whether there are differences Symptom low speeds? For failure analysis of these factors have important reference value.
1, tanks shake: concrete mixer tank in the production process by machining to ensure that the center of gravity on the axis of the tank, so the tank during normal operation is stable, however, because the product material or material uneven operation will lead to shift the center of gravity of the tank, then through the center of gravity of both the upper and lower jitter point occurs when the tank runs. Jitter performance since the product material failure caused by: 1, shake the tank operated with cyclical changes, 2, tanks shake no more than twice a week operation. Such a failure can be obtained by marking to identify the body. Of course, does not rule out the processing tank causes tank eccentric, most OEMs have stringent requirements for the processing tank, tank eccentric possibility is very small, in addition, all the concrete truck mixer at the factory will be debugged , the tank will not eccentric mixer factory, so for the user, the possibility is very low tank eccentric.
If the jitter is not the law, it is necessary to observe whether the muddy oil tank, running any abnormal noise, consider the possibility of air entrainment. Of course, do not forget to check the oil deceleration, gear exclude the possibility of damage, the deceleration will be mixed with chunks of metal particles in the oil when the gear was damaged.
2, the noise: firstly, the hydraulic system itself will sound when the output power, particularly in the high-power output, so if there are empty regularity noise power output, the tank should be excluded from the possibility of serious product material. Noise is divided into two types: a dull roar, a sharp cry clamor. For the former, the air mixed with the reasons should be considered, whether the system is short of oil? Replacing the hydraulic oil filter and the last is when? System piping oil leaks? Clear whether oil tank? Clamor for sharp sounds, but also points pressure overflow noise and mechanical noise causes when overloaded, if the load is too large and exceeds the set value of the system relief valve, the system will overflow, then it will produce sharp clamor sounds, accompanied by the rapid increase in oil. Mechanical causes of noise often as the engine speed is increased to produce.
3, heavy weakness: weakness for overloading faults, we must first understand the age of the vehicle, and the reference vehicle maintenance conditions, in particular, should open the filter inspection, if found metal powder, copper and even chunks of metal foam, that is, within the filter It may conclude pump or motor wear.

没有评论:

发表评论