The upper rotary platform on the lower walking body of hydraulic excavator is as important as the head and trunk of human body. Although its structure is difficult to see from the outside, if the engine and various hydraulic devices installed in it fail or overload, it will affect the overall state of the machine, reduce the performance, and eventually lead to the occurrence of machine failure. Therefore, the daily maintenance and inspection of the upper rotary platform of the machine should be put in the first place. In order to improve the operation performance of the upper rotary platform and prevent unnecessary failure loss, what aspects should be paid attention to in the maintenance of the upper rotary platform?
Regularly check and replace the filter element. In order to prevent dust and impurities in the oil from invading the main parts of the machine, protective measures are taken on the excavator. Several filters are installed on an excavator, and these filters play their respective important roles. The combustion of fuel in an air filter engine requires fresh air. The air filter can remove the dust and other foreign matters in the air drawn into the combustion chamber from the outside, so as to prevent the wear of engine cylinder liner and piston ring. Oil and fuel filter oil and fuel in the storage and refueling process is easy to mix with moisture and dust. The filter can filter foreign matters and prevent the wear of internal system components of the engine. In addition, if the pollution of these filter elements is serious, it will lead to oil or fuel flow is not smooth and engine power is insufficient or poor lubrication leading to engine damage. The function of hydraulic oil filter is to transform the medium of power, so it is strictly forbidden to mix dust and other foreign matters. The hydraulic oil filter can prevent impurities from entering all parts of the hydraulic device. In addition, the suction filter is installed in the hydraulic tank to protect the hydraulic pump in the hydraulic circuit. After working, the oil will return to the hydraulic oil tank, and the oil return filter is installed at the oil return part.
Therefore, it can be judged whether the pump or other parts of the hydraulic system are abnormal by observing the pollution degree of the oil return filter (such as whether there are iron chips). When the oil passes through the filter element, the impurities can be removed. Therefore, with the accumulation of time, the pollution of the filter will become more and more serious. If the polluted filter is not replaced in time, the oil flow will be reduced and the original performance of the machine will not be fully developed. In addition, if you continue to use the filter that has been damaged or excessively polluted, you will not be able to filter impurities, thus shortening the service life of the machine. Therefore, the filter element should be replaced regularly, and it should be replaced immediately if any abnormality is found in daily maintenance and inspection. In order to prevent the wear of the machine, enough oil and grease should be added. During the operation of the hydraulic excavator, there will be great friction in all parts of the machine.
Grease and oil can reduce the friction, because grease can form oil film to prevent the metal parts of the rotating parts from contacting each other. Filling oil and grease is an important operation, which is mainly to reduce friction and wear, and make the machine run smoothly. However, if the oil is not enough, or if the deteriorated grease is added, the oil film will not be formed and the metal parts will contact each other, which will cause wear and bite. If the machine continues to operate in this state, it will cause the burning of the matching parts of the moving parts of the machine, and it will fall into the shutdown state when it is serious. Therefore, a sufficient amount of oil and grease should be added regularly. It is very important to check and change the oil in the oil tank regularly for the normal operation of the machine. To sum up, the maintenance points of the upper rotary platform of the excavator are: regular inspection, replacement of the filter, and regular filling of enough oil and grease!