"There are many ways to damage the bearing, today we will talk about it specifically, the first is peeling, mainly the running surface peeling, after peeling is obviously convex and concave.

What are the reasons? First, the load is too large, the use is improper, the second is the poor installation, the third is the poor accuracy of the shaft or bearing housing, the clearance is too small, the foreign matter is intrusive, the rust occurs, and the hardness decreases due to abnormal high temperature.

How to deal with it: Re-study the use conditions, re-select the bearing, reconsider the clearance, check the machining accuracy of the shaft and bearing housing, study the design around the bearing, check the installation method, check the lubricant and lubrication method

The second is bearing burn, that is, the bearing is heated and discolored, and then the burn cannot rotate, because the clearance is too small, insufficient lubrication or improper lubricant, excessive load, and roller deflection

How to deal with it: Set the appropriate clearance, check the type of lubricant to ensure the amount of injection, check the conditions of use, prevent positioning errors, check the design around the bearing, including the heating of the bearing, and improve the bearing assembly method

The third is crack defects, which are reflected in some gaps and cracks, mainly due to excessive impact load, excessive interference, large peeling, friction cracks, poor installation side accuracy, and poor use.

Protective measures include checking the conditions of use, setting appropriate interference and checking materials, improving installation and use, preventing friction cracks, and checking the design around the bearing

Fourth, the cage is damaged, that is, the rivet is loose or broken, and the cage is broken, the main reasons are excessive torque load, high-speed rotation or frequent speed changes, poor lubrication, stuck foreign bodies, large vibration, poor installation, that is, installation in an inclined state, abnormal temperature rise.

If measures are avoided, check whether the conditions of use do not conform to the regulations, check the lubrication conditions, whether there is oil leakage, re-study the selection of cages, pay attention to the use of bearings, and study the rigidity of the shaft and bearing housing

Fifth, abrasion and strain, that is, the surface is rough, accompanied by a small dissolution, and the abrasion of the ferrule edge and the end face of the roller is called a stuck wound

The reasons are poor lubrication, foreign matter intrusion, roller deflection caused by bearing tilt, oil breakage of the flange surface caused by large axial load, large surface roughness, and large sliding of rolling elements

The measures are to re-study the lubricant, lubrication method, check the use conditions, set the appropriate preload, strengthen the sealing performance, and use the bearing normally

Sixth, rust and corrosion, which is reflected in partial or total rust on the surface, and rust in the form of rolling element tooth pitch

The reasons are poor storage, improper packaging, insufficient rust inhibitors, intrusion of moisture, acid solutions, etc., and the bearing is held directly by hand

Measures are taken to prevent rust during storage, strengthen sealing performance, regularly check lubricating oil, and pay attention to the use of bearings

There is also turbidity, which is the ............ of red rust-colored wear powder particles produced on the mating surface.

Abrasion is the surface wear, resulting in dimensional changes, mostly accompanied by abrasion and wear marks.

Electric rot is a crater with a flame-breathing mouth on the rolling surface, and a corrugated plate shape for further development

The reason is that the rolling surface is energized, and the measures are to make a current bypass valve, and to take insulation measures to prevent the current from passing through the inside of the bearing

Indentation bruises, the phenomenon is the surface pits caused by the jamming of solid foreign objects or impacts, and the installation is a ......... of abrasions. ”

Liu Lang's understanding and cognition of machinery is much better than others, and his memory is extraordinary, no matter how many books he has read, as long as he wants to memorize it, he can never forget it, even if he didn't remember it at the time, if necessary, he can also enter the mysterious state in his mind, and all the historical moments he has experienced can appear in front of him.

In less than a month, Liu Lang theoretically "armed" the minds of the workers, and all that remained was to keep practicing, practicing, and practicing.

C's knives were also shipped to Fucheng, the workers made knives in the morning, practiced manufacturing bearings in the afternoon, everything went step by step, according to this speed, the first batch of 20,000 knives in another month can be put on the market, a total of five types, the most expensive one is fifty-six yuan, the cheap one is thirty-seven yuan, two-thirds cheaper than imported knives, the quality is a little worse, but not much, mainly the problem of raw materials, such as heat treatment and cold treatment process There are some problems.

Even if the quality is a little worse than foreign products, but it is basically in line with Liu Lang's standards, with a very good cost performance, Liu Lang believes that this batch of knives will be sold well after entering the market, and even in short supply.

The manufacture of bearings is naturally slower, the production of knives has entered the agenda, with the arrival of West German C company tools, the whole factory workers have set off a wave of work.

Every time Song Lifeng came to NORINCO, he saw that the workers of the factory were full of enthusiasm, and these workers always gave people a state of "hunger and thirst", which was not seen in other enterprises at all, which made him more eager to implement his reform plan.

At the end of March, at this time, Fucheng is still a little cold, but the spring breeze of reform can not be stopped, this year is the first year of the nineties, but also the first year of the country's Eighth Five-Year Plan, the whole country is full of energy.

Liu Lang reads the newspaper every day, and the development direction of the new decade has been published from the state to the local level, vigorously strengthening domestic and foreign investment, increasing the income of the people, modernizing industrial transformation, scientific and technological innovation, enhancing education, and so on.

At the same time, there are other words that are slowly falling silent, such as self-reliance, which no longer appears in newspapers.

After all, now that the country has opened up the country, a large number of foreign companies have poured in, and self-reliance is out of date.

The fastest growing provinces are, of course, the southern provinces, which have taken advantage of their superior geographical conditions to stand at the forefront of reform, and it is not the spring breeze of reform that blows to them, but the wind of reform.

Standing in the wind, even a pig can be blown into the sky, Liu Lang saw in the newspaper that the experience indicators of the southern provinces are rubbing up, especially Guangdong Province, in the early stage of reform and development ten years ago, their total value was only half of that of Liaobei Province, and two years ago, Guangdong Province has been on an equal footing with Liaobei Province, as for the statistics of this year, Guangdong Province deservedly became the country's largest economic province, with a total of 300 billion US dollars, but there is still a huge gap compared with the 1.5 trillion US dollars of Wanwan and the 800 billion US dollars of Hong Kong Island, after all, people are four small dragons, and now Guangdong Province can only be regarded as a python。

But in the early days of reform and opening up, how much were they? Less than $20 billion, even if it means that their total economic output has expanded more than tenfold in 12 years.

In the past 10 years, the average annual economic growth rate of Guangdong Province has exceeded 30 percent, and even reached 40 percent in the fastest year, which is a terrifying figure.