Teach you how to extend the life of the crusher bearing

In recent years, China's construction, cement, metallurgy and other industries have developed rapidly, and the use of crusher equipment has gradually expanded. However, because the customer often ignores the maintenance of the bearing, the machine malfunctions and cannot operate normally. The following Asian Fluid Network Xiaobian introduced some tips for extending the life of the crusher bearing, hope to help everyone.

1. First check the number of parts before installing the crusher equipment, and check the damage caused by the machining surface and thread of each part during loading and unloading.

2. When installing the crusher, apply dry oil on the fixed contact surface and apply thin oil on the movable surface. In particular, after the bearing is installed, the outer ring must be inclined to apply the lubricant for the bearing.

3, daily use should pay attention to cleaning the bearing, first put the bearing into the oil, then use the brush to brush the dirt on the bearing surface, then properly heat the oil, and then detailed cleaning of the ball and holes inside the bearing .

4. After the crusher has been working for a period of time, it is necessary to carry out regular inspections. Remove the hardware and if the bearing wears less, it can be turned on the lathe to the correct geometry. At the same time, pay attention to the gap between the eccentric shaft and the bearing bush and the mandrel and the bearing bush. If it exceeds 1.5 times, it should be replaced or padded.

5. The lubricant application of the bearing is also very particular. When the grease is lubricated, it covers all the roller surfaces. After the coating, the position of the outer ring is restored. It is also necessary to cover the dust with a plastic film.
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One-way bearing structure and working principle

A one-way bearing is a type of bearing that is free to rotate in one direction and lock in the other direction. One-way bearings are also called backstops or overrunning clutches, but are named according to different industries and different functions. The metal casing of a one-way bearing contains a large number of rollers, needles or balls, and its rolling seat (hole) is shaped so that it can only roll in one direction and a large resistance in the other direction ( The so-called "one-way").

1. Slope and roller design

The ramp and roller one-way clutch consists essentially of an outer ring of cylindrical inner diameter, an inner ring with a ramp, and a set of rollers that are respectively spring-loaded and in close contact with the inner and outer rings. As long as the rotation of one of the raceways in its direction of motion has an effect on the other, this arrangement essentially ensures the instantaneousness of the speed of overrun and ensures immediate drive capability.
2, wedge design

The wedge type one-way overrunning clutch is generally composed of an inner ring, an outer ring, a wedge group, a wedge cage, a strong spring and a bearing. The wedge transfers forces from one raceway to the other by wedging between the inner and outer races. The wedge has two diagonal diameters (ie, the distance from one corner of the wedge to the other diagonal) one of which is larger than the other. The wedge action forces the wedge to have a larger vertical position on a relatively large cross section when the inner and outer rings are rotated relative to each other.
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How is the radial thrust bearing defined?

The radial bearing is the bearing that mainly bears the radial load, such as the deep groove ball bearing; the thrust bearing is the bearing that mainly bears the axial load, such as the thrust ball bearing; the radial thrust bearing is the bearing that bears both the radial and axial loads. Such as angular contact ball bearings. The radial thrust bearing is mainly used for the installation and fixing of the radial and axial load transmission shafts.

For a single radial thrust bearing, the gap width between the outer ring and the inner ring on each end face of the bearing is different. Therefore, the wide side of the bearing is named the bearing front side, and the narrow side of the bearing is named the bearing back side. . Front-to-front mounting is called face-to-face mounting and back-to-back mounting is called back-to-back mounting. The radial thrust bearings are mounted in pairs on the drive shaft. They are available in two mounting methods: face-to-face mounting such as: 7210C/DF, back-to-back mounting such as: 7210C/DB. The corresponding old code is enclosed in parentheses above.

In the operation of the bevel gear transmission shaft and the cutter cutter grinding wheel shaft, there are axial forces transmitted from the bevel gear and the grinding wheel to the transmission shaft, in order to effectively eliminate the axial force from the two ends of the rotating body. The thrust bearings must be mounted on both ends of the rotor in face to face or back to back. Since there is a certain bearing clearance between the inner ring and the outer ring of the bearing, in order to improve the rotation precision and rigidity of the transmission shaft, the bearing should be preloaded when installing the thrust bearing. That is, during the installation process, the bearing is given a certain axial force, so that the inner and outer rings of the bearing are relatively displaced, thereby eliminating the play and generating elastic pre-deformation at the contact between the ferrule and the rolling element, thereby improving the shaft. Rotation accuracy and stiffness. The pre-tightening force can be obtained by means of a metal gasket or a narrow ferrule.

The use of each type of equipment or products, their characteristics and functions are often the focus of users. With the rapid development of China's economy and technology, many traditional products or equipment can no longer meet the production needs, and accelerate the competitiveness of traditional products. There have been more and more problems, but for the future of these products and equipment, and for the future of our economy and national defense, we must face these challenges bravely.
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How to measure the clearance of the radial thrust bearing

The inner ring of the bearing is tapered and must be matched with the tapered surface of the main shaft. Other bearings should also be noted. For example, the loose ring and the tight ring of the thrust bearing should be installed correctly. The tight ring should be rotated, and the adjustment should be based on the beating of the main shaft. Adjusting its gap, the gap will be too small for the spindle to heat up, but the heat can not exceed 60 degrees, the overheating should burn the bearing. The adjustment is achieved by loosening or tightening the back cap on the back of the bearing. Different bearings have different adjustment methods for different bearings.

The life of a radial thrust ball bearing is very important in terms of maintenance and maintenance, because it is related to the length of the bearing life and the level of work efficiency. Maintaining the bearings used will bring a lot of benefits, such as high production efficiency, production of higher quality products, and several maintenance times to extend your life. .

1 Adjust the gasket method:

A set of soft material gaskets is placed between the end of the radial thrust ball bearing end cover and the end of the bearing housing; when adjusting, the bearing end cover is not placed on the gasket, and the screw on the bearing end cover is evenly tightened on one side. The hand rotates the shaft until the bearing rolling element contacts the outer ring and there is no gap inside the shaft; at this time, the gap between the bearing end cover and the end face of the bearing seat is measured, and the shaft required for the normal thrust ball bearing in normal operation is added. To the gap; this is the total thickness of the required gasket, then fill the prepared gasket between the bearing end cap and the end of the housing, and finally tighten the screw.

2 Adjust the bolt method:

Press the pressure ring on the outer ring of the radial thrust ball bearing and pressurize with the adjusting bolt. Before adjusting the pressure, first measure the pitch of the adjusting bolt, then slowly tighten the adjusting bolt until there is no gap inside the bearing. Then calculate the corresponding rotation angle of the adjustment bolt. Grease-lubricated radial thrust ball bearings should be replaced after 1500 hours of operation. The amount of oil to be filled should be appropriate. Because too much or too little grease will cause the thrust of the radial thrust ball bearings. The amount of fuel is generally controlled. The volume of the bearing chamber is preferably 1/2 to 2/3.

The clearance of the radial thrust bearing can not be found under normal circumstances, but the user can find in the rolling bearing manual that the level of free clearance corresponds to the letter in the bearing code, such as the free clearance of different grades of C1, C2 and C3 commonly used in production. General versatile information, such as the Mechanical Industry Press, "Rolling Bearing Manual." Normal centripetal thrust bearing clearance user does not need to measure, as long as it is a qualified product, in its bearing accuracy and clearance (marked in the bearing model is not part, as specified in "/S3", as we do not have to test the bearing material The same hardness.
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