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How to Judge Whether the ​Slewing Ring is Working Normally?


1. The method of detecting the quality of the slewing ring


It cannot be ignored that the slewing ring needs to be inspected for quality before it is used. The inspector will inspect some problems such as the change of the clearance of the slewing ring, the response to different temperatures in the same environment, and of course, choose the appropriate model. After all the above standards are met, the warehouse can be put into storage.


The slewing ring bearing clearance is divided into axial clearance and radial clearance according to the different measurement directions. Radial clearance is the basis for the assembly of the bearing inner ring, outer ring and rolling elements. It is an important technical quality requirement item in national standards and other regulations, and an important inspection item. From the perspective of bearing application, clearance is also one of the important technical indicators. Whether the bearing can obtain satisfactory performance depends to a large extent on its radial clearance. From the design and use of bearings, the clearance can be divided into: design clearance, original clearance, installation clearance and working clearance.


The clearance achieved after the slewing ring drive is assembled is the original clearance, and the clearance changes after the main engine is installed, which is called the installation clearance (or fitting clearance), and the clearance of the bearing during the actual operation is called the working clearance. gap.


2. The method of judging whether the slewing ring is working normally


The slewing ring is lubricated with grease, and the noise is probably caused by the problem of lubrication. Common reasons include lack of grease in the raceway, uneven filling of grease, poor quality of grease and embrittlement, and incorrect use of lubricating fluid. To deal with this problem, just apply a suitable lubricant, fill it immediately, and replace it immediately.


We can judge from the rolling sound of the slewing ring. Generally, after running the slewing ring, we should carefully distinguish the timbre of its rolling sound to see if there is any abnormal sound in the whole process of operation, that is, To say whether there is an irregular sound, we can judge the sound of the scrolling, and everyone can judge whether it belongs to all normal operations. If there is an abnormal sound, then everyone must check whether it is Which stage of damage occurs, if the cause of common faults is found, then effective and reasonable maintenance methods must be adopted to carry out maintenance and solve difficulties afterwards.


When the rolling surface of the slewing ring is cracked, embossed or rusted, it will also hear regular vibrations like riveted bolts, scars will continue to appear on the cross-section, and the scars will be looming on the bearing steel ball, and this kind of noise will follow Installation and lubrication standards vary. The release method is to install without hitting the rolling bearing or apply a high-viscosity grease.