top 1 selling slewing ring bearing ball made in china
Table of Contents
1.The working principle of the slewing ring bearing
Slewing bearings are widely used in machinery, such as excavators, disintegrators, stackers and reclaimers, graders, road rollers, and roadheaders. Not only that, but also in new energy equipment, amusement equipment, metallurgical equipment, etc.
It also has its application in China, so what is the working principle and working method of the slewing ring bearing? Below, the editor will take you to understand some knowledge about slewing bearings, you can learn and understand.
First, the working principle of the slewing ring bearing
The working principle of the slewing ring bearing is to move the object from sliding to rolling to reduce frictional resistance. It mainly relies on lubrication and friction to achieve the purpose of operation. Internally, it relies on the mutual friction of balls and steel rings.
The friction between the slewing ring bearing and other parts runs, rubs against each other, and drives the object to operate. Although it relies on friction to operate, lubrication is also indispensable. If it is used for a long time and the friction is too large, it will also affect the application of parts.
Therefore, after using this kind of bearing for a period of time, it must be maintained in time. , brush some lubricating oil.
2. How the slewing bearing works
1. Point contact scrolling
The working principle of point contact rolling is mainly used for four-point contact ball slewing ring bearing and crossed roller slewing bearing.
This working principle has higher requirements on the quality of steel balls for the combined bearing of point contact radial and axial forces, and the angle of the track should be uniform.
2. Rolling and sliding combined rolling type
The rolling-slip combined rolling working principle is mainly used for ball-column combined slewing bearings. This principle has small eccentricity and long service life, and has the advantages of a dual structure of rollers and balls.
3. Surface contact rolling and sliding combination
The working principle of surface contact rolling and sliding combination is mainly used for turntable bearings. Now the new type of turntable bearing has a compact structure and high precision, so it is suitable to use the surface contact rolling and sliding combination.
4. Surface contact rolling combination
The surface contact rolling combined working principle is mainly used for three-row roller slewing bearing, its advantage is that the contact surface is large, the bearing force is uniform and the rolling is flexible.
2.How to disassemble the large slewing ring bearing
Slewing bearing is a kind of large bearing with special structure. It can bear large axial load, radial load and overturning moment and other comprehensive loads at the same time.
It is widely used in various industries or equipment. Many friends are not very familiar with how to disassemble large slewing bearings.
Next, the editor of Hengguan will introduce the four commonly used bearing disassembly methods for you.
1. Knock Disassembly Method
The knocking method is used in many disassembly scenarios. Simply put, a copper rod or other soft metal material smaller than the inner diameter of the bearing is used against the shaft end (if the bearing is located at the end of the shaft), and a hand hammer is used to strike the inside of the bearing evenly and forcefully.
The ring slowly dislodges the bearing. This method is simple and easy to implement, but the disadvantage is that it is easy to cause damage to the bearing, so be careful when operating, and pay attention that the impact point of the knock should not fall on the rolling body and cage of the bearing.
2. Pull out disassembly method
This method requires the help of a special puller, and the tool can be pulled evenly by rotating the handle to pull out the bearing. This method has better protection for the bearing, and the following points need to be paid attention to during operation:
1. The hook of the puller should be hooked to the inner ring of the bearing. If it is hooked on the outer ring by mistake, it may cause excessive loosening or damage to the bearing.
2. To align the screw rod with the center hole of the shaft, pay close attention to the force of the bearing during the pull-out process to avoid damage to the hook and bearing.
3. Pay attention to prevent the hook from slipping off, and the angle of the two feet of the puller should be less than 90°
3. Pushing and disassembling method
This method requires the use of a press to push the bearing, the working process is stable and reliable, and generally does not damage the machine and the bearing. Note that the force point of the press should be on the center of the shaft and cannot be biased. Common presses are manual, mechanical or hydraulic.
4. Heat treatment disassembly method
The bearings used for disassembly of the tight fit can be heat-treated first, and then pulled out with the help of a puller. Generally, the oil heated to about 100 ℃ is poured on the bearing to be disassembled. After the bearing ring is heated and expanded, the bearing is pulled out evenly with the help of a special puller.
When disassembling this method, self-protection and oil recovery should be done to prevent burns; the shaft body should be wrapped before heating to prevent the bearing from being disassembled due to thermal expansion of the shaft body.
