Structure and lubrication principle of excavator slewing bearing.
1. Overview. The excavator is one of the very important mechanical equipment in modern engineering, and the slewing bearing is the key component in the slewing mechanism of the excavator. The structure and lubrication principle of the slewing bearing have an important impact on the performance and service life of the excavator. This article will introduce the structure and lubrication principle of Carter excavator slewing bearing in detail.
Second, the structure of the slewing bearing of the Carter excavator.
Carter excavator slewing bearings are made of high-strength steel, precision machined and heat treated, with high wear resistance and high load capacity. A slewing bearing consists of an inner ring, an outer ring, a rolling element and a cage. The inner ring is mated to the journal of the slewing ring, while the outer ring is mated to the housing. The rolling elements are spherical or cylindrical in shape and are able to roll freely between the inner and outer rings. The function of the cage is to guide the motion of the rolling elements and prevent them from touching each other.
3. Lubrication principle.
The lubrication principle of slewing bearings is mainly to separate the rolling elements and the inner and outer rings by grease or lubricating oil to reduce friction and wear. In the Carter excavator slewing bearing, the grease is injected into the bearing seat through the oil injection hole, and the grease is distributed to the entire bearing seat under the action of gravity and friction to form a protective film to separate the rolling elements and the inner and outer rings to reduce friction and wear. At the same time, the grease can also play a role in cooling and sealing, preventing external impurities and moisture from entering the inside of the housing, and keeping the slewing bearing in good operating condition.
4. Influencing factors.
The performance and service life of a slewing bearing is affected by a number of factors, the most important of which are load, rotational speed, grease selection and amount used, ambient temperature and humidity. In Carter excavator slewing bearings, the load is mainly determined by the weight and workload of the excavator, so it is necessary to choose a slewing bearing with high load carrying capacity. The rotational speed will affect the distribution of the grease and the effect of forming a protective film, so it is necessary to choose the appropriate speed. The selection and amount of grease will affect the lubrication effect and the service life of the bearing, and need to be selected and used according to the actual situation. The ambient temperature and humidity will affect the performance and use effect of the grease, and it is necessary to pay attention to control the ambient temperature and humidity during use.
5. Maintenance suggestions.
In order to maintain the good operation and service life of the carter excavator slewing bearing, it is recommended to carry out regular maintenance and maintenance. The specific recommendations are as follows:
1.Regularly check the lubrication of the slewing bearing to ensure that the grease is sufficient and that there is no leakage.
2.Choose the right grease according to the actual situation and use it correctly according to the instructions for use.
3.Regularly clean up impurities and dust around the slewing bearing to keep the surrounding environment clean.
4.Take care to control the ambient temperature and humidity to maintain the performance and effectiveness of the grease.
5.When replacing the grease, make sure that the new grease is the same model and brand as the original grease to ensure good lubrication.
6.Regularly inspect the fasteners and seals of the slewing bearing to ensure that they are intact.
7.If abnormal sound or vibration is found in the slewing bearing, it should be stopped immediately for inspection and troubleshooting.
8.During the use of the excavator, overload or continuous work for a long time should be avoided to prevent excessive wear or damage to the slewing bearing.
VI. Conclusions. 
The structure and lubrication principle of CAT excavator slewing bearing have an important impact on the performance and service life of the excavator. Understanding the structure and lubrication principles of slewing bearings helps us to better use and maintain excavators, extend their service life and improve work efficiency. In the process of daily use, special attention should be paid to the lubrication and maintenance of the slewing bearing to avoid excessive wear or damage. At the same time, the slewing bearing and its surrounding components should be regularly inspected and maintained to ensure the normal operation and safety of the excavator.