Angular contact ball bearings in the installation should pay attention to the problem

Angular contact ball bearings are currently used in many applications. The main reason for self-lubricating flanged bushings is that they can support both axial and radial loads as well as purely axial loads with high limiting speeds and axial loads. Dependent on the size of the contact angle, the greater the contact angle, the greater the axial load. What is meant by the contact angle is simply the angle between the line connecting the ball and raceway contacts in the radial plane and the line perpendicular to the bearing axis. This type of bearing can be roughly divided into two types: separable and inseparable. Here I mainly talk about hydraulic bearings are inseparable 7000 series.

We know that angular contact ball bearings are generally used in pairs, and the size of the contact angle determines its ability to withstand axial loads. Therefore, for the first time to replace the bearing, we must remember its model, including contact angle, installation method, grade, etc. This is very important for the service life and running time of the equipment. Whether the mobile equipment can operate for a long period of time and whether the self-lubricating block can operate correctly depends on the following points. From the experience of my working years, we can see:

First: To choose the right spare parts, the quality of spare parts is related to the operation cycle of the equipment and it is related to the safety of all of us;

Second: The correct maintenance and use of the equipment, which is the key to the operation of the equipment, is the focus of our daily work, but also the necessary conditions for the equipment can be efficient and long-term operation;

Third: Although the quality of equipment maintenance is a guarantee for the equipment's ability to operate, it cannot guarantee that it will not cause any abnormal phenomenon for a long time. Therefore, the key point is still how to properly maintain and use it. This is the key to the good operation of the equipment. of course,

The three terms are not isolated. Although there are points that are important, they must be taken into account at the same time.

We think about why the equipment that is operating can run for a long period of time without a backup machine. I wonder if you thought about it or not. In fact, think about it carefully. Then look at how we did it. Didn't we understand it? The key point is not that we pay special attention to this special period of time. Is it of special concern? When there are abnormalities in important equipment, do we not implement special care? What is special care? It is to provide extra guardianship at all times, that is, to let the development of the situation be within our control and to monitor the causes of failure for us at any time, forcing us to further make relevant remedial measures so that it can be within this period of time. Continue to run. Equipment is also emotional. We usually care for it and it cares. It can serve us well. On the contrary, it can be blind and it will create trouble for you. Therefore, we must understand the actual situation, do a good job in middle school, do a good job in learning, and constantly improve our business capabilities, so that our work can have a new platform and a higher level.

Angular contact ball bearings are divided according to their contact angles and can be divided into three types:

1) 7000 C type, contact angle а=15°, mainly used for larger size precision bearings.

2) 7000 AC type, contact angle а=25°, mainly used in precision spindle bearings.

3) 7000 B type, contact angle а=40°, can withstand large axial loads.

Because angular contact ball bearings are used in pairs, during the installation process, some repair workers generally install them according to their own previous installation methods. They do not know that this is very particular about the way they are installed, which will affect their use. Usage cycle. The wrong choice of bearings, incorrect installation methods, incomplete lubrication, etc., can cause abnormalities in the equipment, such as abnormal sound screaming, increased vibration, and more serious damage to the pump shaft, severe damage to equipment components, and major damage. The equipment accident happened, which is very dangerous. For this reason, we should keep in mind the installation of the bearing itself, remember its model number and record it for future installation. Angular contact ball bearings are generally installed in three main ways:

1) back to back configuration, followed by the code for the DB what is the back-to-back configuration, simply speaking, refers to the bearing outer ring wide face wide face, or refers to the bearing inner ring small end face the small end face installation. This is an installation method that we should often use. Compared to the other two methods, it has the following advantages:

1 The load it bears is separated from the bearing shaft, and the attention is separate;

2 can withstand axial loads acting in 2 directions, but the load in each direction can only be supported by one bearing;

3 Can adapt to relatively high rigidity bearing configuration, and can also withstand overturning moment.

Combining these three advantages, it is not difficult to find that the back-to-back configuration installation separates the load from the bearing shaft. It has the advantages of separating the load from the bearing and the shaft, plus it can withstand the overturning moment, if it is properly selected With contact angles, imagine how much maintenance labor can be saved in actual operations and how many possible equipment accidents can be avoided? Therefore, I recommend the preferred back-to-back configuration based on empirical realities. For example, 14 pumps, ie, angular contact bearings and deep groove ball bearings, are used in the Methanol Refinery rectification plant. They have been operating well for the past few years.

2) Face-to-face configuration, followed by the DF

What is the face-to-face configuration, which is the opposite of the back-to-back configuration, refers to the large end face of the bearing inner ring facing the large end face, or the narrow mounting face of the bearing outer ring to the narrow face. This method is also often used, but it does not have the advantage of back-to-back matching, and the load it receives is the convergence to the bearing shaft. Moreover, this configuration is not as rigid as the back-to-back configuration, and it is not very suitable to withstand the overturning moment.

3) Serial configuration, followed by the serial number DT what the configuration, as the name suggests, is in one direction, a smooth delivery. This configuration is rarely used in practice.

In the actual work, we should use the above method to install as much as possible, but the main should be based on the original installation of the original manufacturer, after all, they have been practice and time and the user's certification to confirm the kind of installation configuration is reasonable Therefore, we must keep in mind the initial installation method, choose the right bearing, and then carefully install it in accordance with the requirements of the repair process, I believe there will be very good results.

Hunan Jintai Hardware and Machinery Co.,Ltd. is a professional manufacturer on various kind of bearings over 15 years China factory.
We are making all kinds of slide bearings including DU PTFE composit bushing, DX POM composite bushing,bimetal bushing,wrapped bronze bushing, cast sliding bushings and wear plate bearing pad, sintered bronze bushing and sintering parts, ball transfer bearings, etc.
The shapes of bearings can be in sleeve, flanged, spherical, plate, washer, pad, ring, square etc.
Base materials in carbon steel, harden steel, iron, stainless steel, bronze, brass, copper, bronze-steel alloy.Lubricant materials in PTFE, teflon, POM, nylon, plastic, oil, graphite, grease, MoS2, etc.
Export to America,Canada,Brazil,Peru,Argentina,Chile,Paraguay,Europe,Finland,France,Germany,Italy,Spain,Sweden,
Britain,Estonia,Ukraine,Turkey,Austrial,Russia,Korea,Malaysia,Singapore,Thailand,Egypt,Kenya,Somali,
Congo,Zimbabwe,South Africa,etc.