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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> Bearings worry-free operation correct device and protection is the key Bearings worry-free operation correct device and protection is the key
When the bearing is damaged, it can cause unexpected equipment suspension. Even if it is stopped every hour; because the early damage of the bearing can also form a huge loss of production; especially the cost of production. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Bearing quality:
Providing worry-free operation for each bearing user is our end intent; however, bearing quality alone cannot guarantee worry-free operation; there are other factors that affect the life of each bearing; this includes:
Operating environment:
If the machine and equipment are to be carried out to the best condition, it is necessary for the bearing to get the correct centering work and avoid extreme heat; moisture and pollution.
Correct device:
Have the right equipment skills and common sense and the right things; the ability to ensure that the bearings are not damaged.
Positive protection:
Then the proper smoothing and protection scheme and the monitoring of the bearing condition are also the main points for carrying out the maximum life of the bearing.
Worry-free homework:
The concept of worry-free operation is to focus on the correct service of the bearing and the correct protection; the intention is to minimize the risk of stopping due to the bearing; and to ensure that the bearing carries forward all its potential. The existing products and services are available. To help you simply carry out the installation and protection of the bearing.
Why does the bearing damage the bearing due to the fine parts; therefore, the demand is quite stable when used; that is, the use of high-performance bearings; if it is not properly used; can not reach the expected function; and simply damage the bearing. The use of bearings should focus on the following:
First, adhere to the hygiene of the bearing and its surrounding environment, even if the invisible shallow dust enters the bearing; it will also increase the wear of the bearing; oscillation and noise.
Second, the use of the device should be careful not to allow strong stamping; do not allow the hammer to directly hit the bearing; do not allow the pressure to pass through the rolling body.
Third, the use of appropriate and precise equipment to try to use special things; try to avoid the use of cloth and short fibers and the like.
Fourth, to avoid the corrosion of the bearing directly when taking the bearing by hand; to wash away the sweat on the hand; and apply high-quality mineral oil before operation; especially in the dry season and summer to pay attention to rust.
However, under certain special operating conditions; the bearing can obtain a better life than the traditional accounting; especially under light load conditions. These special operating conditions are; when the rolling surface (track and roll) is smoothed The oil film is useful to separate and confine the external damage that can be caused by contaminants. In fact; under ambition; the so-called Essence bearing life is capable.
The bearing life is the number of revolutions of the rolling bearing in revolutions (or the number of hours of operation at a certain speed); the boundary: the bearing within this number of hours; should start fatigue damage on any of its bearing rings or rollovers ( Shedding or disability). But it can be seen clearly in laboratory experiments or in practice; it looks like a bearing under the same working conditions; the life expectancy is very different. There are also several different boundaries. Said bearing "life"; one of them is the so-called "working life"; it shows that the actual life of a bearing before it can be damaged is caused by wear and damage, usually not caused by fatigue; Wear, corrosion, seal damage, etc. are formed.
Why the bearing will wear and damage only part of the bearing is damaged in practice.
Most of the bearings are damaged due to a number of loads beyond the original estimate; non-useful seals, too small bearing clearances caused by over-tightening cooperation, etc. Any of these elements have their particular damage type and Special traces of damage will be left. Thus; inspection of the bearing of the damaged shaft; in most cases, the cause of its ability can be found; in general; one third of the bearing damage is caused by fatigue damage; One of the points is due to poor smoothness; the other third is due to the contamination of the contaminant into the bearing or the device is not properly handled.
However, these types of damage are also related to the industry. For example, 85% of the pulp and paper industry is due to poor smoothness or contamination to form bearing damage rather than data fatigue.
How to install the bearing bearing device is good or bad; it will affect the bearing accuracy, life and function. Therefore; please fully study the bearing device; that is, please follow the operating specifications including the following items to carry out the bearing device.
1. Clear the bearing and related parts to the grease-smooth bearing and the double-sided oil seal or dust cover; the seal ring bearing device does not need to be removed.
Second, to view the dimensions and finishing conditions of the associated parts. III. Device The bearing device should be based on the bearing layout; the size of the scale and the cooperative nature of the bearing components; the pressure should be added directly to the end face of the ferrule; Body transfer pressure; bearing devices usually use the following methods:
a. Pressing the inner ring of the cooperative bearing and the shaft to make a tight cooperation; when the outer ring and the bearing housing hole are loosely engaged; the bearing can be first pressed on the shaft by the press; then the shaft is loaded into the bearing housing hole together with the bearing; Mounted on the end face of the bearing inner ring; padded with a soft metal material device bushing (copper or mild steel); the inner diameter of the device bushing should be slightly larger than the journal diameter; the outer diameter should be slightly smaller than the bearing inner ring retaining edge庋乖诒 庋乖诒 3 苌. The outer ring of the bearing and the bearing housing hole tightly cooperate; when the inner ring and the shaft are loosely cooperative; the bearing can be pressed into the bearing housing hole first; Less than the diameter of the seat hole. If the bearing ring is tightly engaged with the shaft and the seat hole; the inner ring and the outer ring of the device should be pressed together into the shaft and the seat hole; the layout of the device bushing should be able to hold the inner ring of the bearing together and The end face of the outer ring.
b. Heating cooperation through heated bearings or housings; using thermal expansion to transform tight cooperation into a loosely cooperating device approach. It is a common and labor-saving device approach. This method is suitable for devices with large interference bearings; The bearing or the ferrule of the separate bearing is placed in the fuel tank and heated evenly at 80-100 ° C; then it is taken out from the oil and quickly loaded onto the shaft; in order to avoid the cooling, the end face of the inner ring and the shoulder are not tight; after the bearing is cooled, Then the axial fastening is carried out. When the outer ring of the bearing is tightly cooperated with the bearing seat made of light metal; the hot-packing method of the heated bearing seat is adopted; the cooperating surface can be prevented from being scratched. When the bearing is heated by the oil tank; at a certain interval from the bottom of the box There should be a grid; perhaps the bearing should be hung with a hook; the bearing should not be placed on the bottom of the box; to prevent sinking impurities from entering the bearing or uneven heating; a thermometer is necessary in the fuel tank; strictly control the oil temperature should not exceed 100 °C; The tempering effect of the attack; the hardness of the ferrule is reduced.
c. The tapered bore bearing of the tapered bore bearing can be mounted directly on the tapered journal; or the tapered surface of the adapter sleeve and the withdrawal sleeve; the degree of tightness of the cooperation can be measured by the reduction of the radial clearance of the bearing; Therefore, the radial clearance of the bearing should be measured before the device; during the installation process, the clearance should be measured to reach the required clearance reduction; the lock nut device is usually used in the device; the heating device can also be used.
d. Thrust bearing device The complete cooperation of the thrust bearing with the shaft is usually a transitional cooperation; the cooperation between the race and the bearing housing hole is usually the cooperation of the gap; therefore, the bearing is easier to install; the shaft Spring of the double-way thrust bearing should be fixed on the shaft. ; to avoid relative to the shaft transformation. Bearing device method; usually under the condition that the shaft rotation is mostly; thus the cooperation between the inner ring and the shaft is a win-win cooperation; the cooperation between the bearing outer ring and the bearing chamber is the cooperation of the gap.
Fourth, after the bearing device view five, the increase of smoothing agent
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Bearings worry-free operation correct device and protection is the key
Source: Bearing network time: 2018-05-19