Industrial Positioners Slewing Bearing In Stock

1.slewing bearing

Due to its reliable performance, stable operation, large rotation angle, easy control and high working efficiency, bucket turbines are widely used in large power plants and transshipment terminals.

Therefore, the slewing bearing plays a key role in the working process of the bucket turbine, but in the long-term working process of the bucket turbine, it not only has a large working load, but also wears the slewing bearing seriously for long-term use, which affects the bucket wheel. Therefore, it is necessary to strengthen and optimize the maintenance process of the bucket turbine.

Bucket turbine slewing bearing usage

The slewing bearing signal in this study is the thrust radial crossed roller bearing (model 1797/3230G2K9) produced by Luoyang Bearing Factory. The equipment has a total of 114 rollers (the diameter and height of the column are φ98mm and 97.5mm, respectively) Mainly in the form of cross arrangement.

A total of 12 bucket turbines are used in a centralized manner. After troubleshooting, 6 new bearings 1797/3230G2K4 were purchased and put into use as spare parts.

For a long time, the bucket wheel machine invested by our factory has shouldered an important mission. Since it was put into production in 2008, relevant technical transformations have been arranged, but only routine maintenance and maintenance are carried out. In the process of practice, the main collection of thousands of gas stations

Medium lubrication is the main method, but due to the long and small diameter of the refueling pipeline, it is difficult to ensure the normal smoothness of the oil circuit, and the slewing bearing pipes and rollers cannot be well lubricated. In May 2014, the overhaul of the bucket turbine was arranged, and the lifting inspection of the slewing bearing was an important part.

In this part, the gear passport and the connecting bolt of the bearing were disassembled, and a 100T jack was used to support it. After careful inspection, it was found that the lubrication system was in very poor condition, the sealing condition was poor, and there were residues entering the bearing track.

Analysis of Failure Causes of Slewing Bearings of Bucket Turbines and Measures Taken

The bucket turbine is different from other mechanical equipment. It is large and difficult to move, and the work intensity is relatively high in the transfer work of the power plant and the wharf. The slewing bearing has brought a lot of damage. The slewing bearing must be effectively maintained during the operation of the bucket turbine.

There are probably several reasons for the failure:

(1) The slewing bearing of the bucket turbine has been used for a long time, and there are some small problems in the maintenance process that have not been paid attention to. The accumulation of problems over time will eventually lead to major failures;

(2) During the working process of the bucket turbine, the overhaul and maintenance of the bucket turbine were not timely, so that some minor problems in the working process of the bucket turbine were not reported for maintenance in time, and the maintenance and cleaning of the bucket turbine was not in place, which made the slewing bearing of the bucket turbine. There is a lot of dust inside, which affects the rotation of the bearing and causes the failure of the slewing bearing;

(3) During the transfer process of the bucket wheel machine, the overloaded transfer of goods will damage the working performance of the bucket wheel machine, thereby causing the work failure of the bucket wheel machine.

Analysis on Maintenance Process of Slewing Bearing of Bucket Turbine

For a large and difficult-to-handle mechanical equipment like a bucket wheel, when it breaks down and decides to overhaul it – be sure to make preparations for the overhaul work. The bucket wheel is different from other small mechanical equipment. Good can

Continue the maintenance with extended time, it cannot leave the transfer work for too long, and the transfer work of the power plant and the wharf will face the threat of paralysis, and it is not practical in most cases to introduce a new bucket wheel , so the maintenance time can only be shortened, and the preparations before the maintenance should be done well.

Technical advice:

Explanation of matters needing attention when overhauling bucket turbine slewing bearing

There are some maintenance items that need to be paid attention to during the maintenance process of the bucket turbine. First of all, pay attention to the lubrication effect of the bearing raceway during the maintenance process of the slewing bearing.

For a huge slewing bearing, if the lubrication effect of the narrow and long raceway is not good, not only the dust accumulated in the raceway will affect the operation of the bearing for a long time, and the rolling It is difficult for the lubricating oil added to the raceway to have the desired effect.

In this way, even if the slewing bearing is repaired, when it is put into use, the bearing will be worn again due to the poor lubricating effect of the raceway, which takes a long time. Bearings will also fail, so we must pay attention to the lubrication and cleaning of bearing raceways, pay attention to the method of adding lubricating grease, and minimize bearing wear.

Secondly, in addition to the impact of the lubrication effect of the raceway on the slewing bearing of the bucket turbine, the upper body of the bucket turbine has a deviation in the balance moment, which makes the wear of the bearing in the raceway more serious. Correction of the counterweight to reduce the deviation of the balance moment of the upper body of the bucket turbine.

Finally, pay attention to the installation of the local tempering belts on the inner and outer rings of the bearing. Resolutely do not install the tempering belts on the inner and outer rings in the same way. They must be installed staggered from each other to reduce the bearing capacity of the bearing and reduce the effect of the tempering belt on the bearing operation process. of wear.

Therefore, it is necessary to confirm the model, technical agreement and bearing confirmation drawings in advance, and prepare new large bearings in advance in case of emergency.

Through the explanation of the reasons for the failure of the large-scale slewing bearing of the bucket turbine, the analysis of the maintenance process during the maintenance process, and the precautions during the maintenance, it is known that strengthening the maintenance and maintenance of the large-scale slewing bearing of the bucket turbine in the process of the bucket turbine

It is very important, and for this kind of bulky mechanical equipment, strict maintenance and cleaning work can not only find problems in time and report them to the maintenance personnel for timely maintenance work, but also protect the bucket turbine to a large extent.

The stability of the working performance reduces the failure rate of the bucket wheel. For the maintenance process of the slewing bearing, it can effectively shorten the maintenance time, try to ensure the highest and most stable working performance of the bucket turbine with the lowest maintenance cost, and improve the transfer level of the bucket turbine.