Some knowledge elements imported deep groove ball bearing life

First, deep groove ball bearings are correctly installed, directly related to the accuracy of bearing life and performance. Therefore, installation and design department for bearing installation to fully research, analysis of the bearing structure, etc. in order to ensure normal operation of the double row ball slewing bearing:
Cleaning bearings and related components; this is very important, attention must be cleaned to prevent debris in them. Check the size and finishing the connected components; this requires some specialized tools to ensure the accuracy of the bearing installation. After installation check the bearings; check whether the bearing support, if there is the wrong place. Supply lubricants, require careful operation, it is important.
Second, deep groove ball bearings basic monitoring conditions:
Need some professionals, the bearings have regular checks, which can identify potential problems early will prevent unexpected machine stop, so that production can be safely carried out to improve plant productivity and efficiency. During use of the bearing, the basic external conditions should always be monitored bearing run, such as temperature, vibration and noise measurements, etc., so as to take preventive measures.
Third, the alignment deep groove ball ball and roller combined bearing, alignment:
These actions could accelerate fatigue and reduce bearing life, will damage the life of other machine parts. Furthermore, increased vibration and friction can significantly increase energy consumption and the risk of premature failure. However, after installing the bearing, if not carefully for alignment, alignment may lead to additional load bearing suffering, friction and vibration. Leading to premature failure of the bearing in advance, so it should be adjusted, alignment!
Fourth,deep groove ball bearing re-lubrication:
If deep groove ball bearings consider lubrication oil lubrication dominant. However, they can simplify the specialty grease around the bearing structure. In the course of the operation, deep groove ball bearings requires the correct re-lubrication, lubrication of the bearing assembly benign operation, in order to play well bearing function, first, to select the appropriate conditions of use, purpose of use lubrication method is the use of lubricating oil or grease lubricated bearings depends on the specific circumstances and given up!
Fifth,deep groove ball bearings to remove:
Use the proper tools to remove, which will help prevent damage to other machine components, incorrect technique may have to remove the bearing damage, if bearing reaches its end-use period of time, it should be replaced out. Although bearings can no longer be used, but the right to remove the original bearings, timely replacement of the new bearings, new stacker-reclaimer bearing for extended life can play a good role in promoting, so replacement of old and new, is very important, you need to check the operation of professional staff .

How to measure the operating temperature of thrust ball bearings

Thrust ball bearing temperature, generally by the bearing chamber outside temperature can be inferred that if the use of the hole can be measured directly thrust ball bearing outer ring temperature, the more appropriate.
Typically, thrust ball bearings with the four point contact ball slewing bearing operating temperature slowly began to rise 1-2 hours to reach steady state. Normal temperatures thrust ball bearings due to the heat capacity, heat capacity, speed and load of the machine and different. If lubrication, improper installation, the bearing temperature will be rapid-rise, there will be abnormal high temperature, when to stop running and take the necessary precautions.
You can always use the thermal sensor to monitor the thrust ball bearing operating temperature, and automatic alarm or stop to prevent burning shaft accident temperature exceeds a predetermined value.
Often expressed with a high temperature thrust ball bearings in unusual circumstances. Temperature is harmful to thrust ball mobile crane bearing lubricant. Sometimes bearing overheating can be attributed to the bearing lubricant. If the bearing temperature over 125 ℃ even move to reduce long bearing life. Causes high temperature bearings include: lack of lubrication or excessive lubrication, lubricant. Contains impurities, the load is too large, the bearing ring damage, lack of space, and high-friction seals and so on.
Thus, continuous monitoring of bearing temperature is necessary, whether measured bearing itself or other important parts. If you are under the same operating conditions, any change in temperature may indicate a fault has occurred.
Thrust ball bearing temperature measurement by means of regular thermometer, such as digital thermometers, bearing temperature can be accurately measured and determined in accordance with ℃ or Fahrenheit units.
The importance of thrust ball bearings, which means when it is damaged, can cause equipment downtime, so the best type of bearing temperature detectors should be installed.
Under normal circumstances, thrust ball wind power bearing lubricated or relubricated immediately after the temperature increase, and there will be natural for one or two days.

Training skilled bearing managers

Product quality, a process to ensure a scientific, but also have high-quality management personnel to implement. Antirust management is "prevention" and take preventive measures, will produce metal corrosion factor nipped in the bud, and which requires skilled, with high-quality management personnel.

First, truck mounted crane bearing managers are required to have anti-rust metal corrosion basic theoretical knowledge, have a certain level of expertise, the importance of anti-rust management have a full understanding, there is a high degree of responsibility, anti-rust process specification can conscientiously implement and carry out supervision carried out.

For example, requiring antirust level managers must have a college degree, a metal corrosion expertise, familiar with the bearing processing the entire process, all bearing rust can develop technical rules, with a production deal with and solve problems arise the actual ability, training and work instructions antirust members.

Owned manufacturing plant for rust prevention officer asked two must have a high school education, after induction by the technical department for their technical training, basic theoretical knowledge from rust-proof, rust-proof technology content and operation points and rust-proof materials during use detection and monitoring methods to the importance of anti-rust work, so that they improve their professional skills by learning antirust comprehensive system to enhance awareness of disease prevention, according to the company's leading technology can apply the knowledge learned documents, combined with the specific units case for the unit to work out specific antirust rules; each member of every able-rust-site inspections, monitoring the implementation of anti-rust process, the general anti-rust problems can be analyzed and timely processing solutions, that can not be resolved problems promptly report to their superiors technology sector, cooperative solutions; and is able to project accurately monitored regularly testing according to process requirements. So a team of professional technical and management training is very necessary.

Formulate scientific management methods

Management is a concrete manifestation of anti-rust management, saying no rules, no standards, good scientific management is an important means to ensure product quality. Antirust management including process management, cooling water management, anti-rust solution management, cleaning vertical mill bearing fluid management, anti-rust oil management and rust auxiliary materials management. Los axis using two anti-rust management system, at the level of anti-rust technology management department, responsible for the development and centralized management of anti-rust process, responsible for anti-rust auxiliary materials testing and inspection, is responsible for technical guidance rustproof member responsible antirust work for secondary management assessment, and rust-proof new technology, research and development and application of new technologies.

The difference between domestic and foreign rolling bearings

Our precision spindle bearings industry started construction in 1950, after half a century of development, has formed a relatively complete system of production and technology system, to become the world's fourth largest country rankings bearing manufacturer in Japan, the United States and Germany, and has achieved remarkable achievement. However, compared with the bearing industry developed countries, China's bearing industry, there are still a big gap. Main features:

One on varieties, different specifications of products triple row roller slewing bearing the world total of about 150,000, our total production to date only two thousand months, and mostly for generic products.

Second, the production capacity, China's current production is about bearing more than 2,000 enterprises, is 5 to 6 times in other countries around the world bearing companies combined. However, the annual output value of the country's only comparable to the United States ranked sixth TIMKEN (about 21 billion yuan); compared with the number one Swedish company, equivalent to only half of its annual output (about 40 billion yuan) of ; Compared with Japan, equivalent to only ten percent of its annual output.

Third, the dimensional tolerances and precision rotation, even though our country is close to self aligning ball bearing foreign brand-name level, but in terms of the size of the deviation of the dispersion, there are still a wide gap. In addition, the countries have already begun to study and application of "non-repeatable runout" This fine precision rotation indicators, and our research in this area is still blank.

Fourth, in the high-speed performance, the value of foreign brands of DmN 4 × 106mm · r / min, while China bearing only 2 × 106mm · r / min.

Fifth, the vibration, noise and different sound, Japan has launched a mute and ultra-quiet bearing, and our bearing vibration (acceleration) compared to the extreme levels of Japanese products, generally more than a difference of 10dB.

Sixth, in life and reliability, deep groove ball bearings, for example, foreign brands of life is generally calculated life of more than 8 times (up to 30 times), the reliability of more than 98% (or to pursue with the host and other life), and our general life of the bearing life calculation is only 3 to 5 times the reliability of about 96%.

Seven, in the special conditions of the bearing application technology, China's bearing is there is a considerable gap.

It is precisely because there are not enough of bearings from different specifications to performance quality and other aspects, therefore, not only in the export, the vast majority of low-end products, each bearing an average price of only about $ 0.4, does not have any technical competence, and In a number of important host country or areas, such as civil aviation aircraft, high-speed railway passenger cars, luxury cars, computers, air conditioners, and other major equipment imported type, essentially consists of imported bearings "domination." These industries or areas, and there is a pillar industry of the national economy or in the field.

Novel oil-bearing

Base metal inlaid solid self-lubricating high precision ball bearings are both a metal bearing characteristics and features of the new self-lubricating bearings lubricated bearings, a metal matrix load bearing, solid lubricant specially formulated lubricant.

It has a high carrying capacity, impact resistance, high temperature resistant, self-lubricating ability and other characteristics, especially suitable for heavy, low speed, such as swinging back and forth, or difficult to form a film of lubrication and equipment, but also afraid of flush and other acid erosion and erosion.

Users generally reflect the mosaic deep groove ball bearing not only fuel-efficient, energy-saving, and life expectancy is longer than ordinary plain bearings.

Mosaic self-lubricating composite material is a novel anti-extreme pressure solid lubricant material, a metal substrate and embedded substrate hole or slot solid lubricant paste composition. In the course of friction metal substrates bear most of the load.

By friction, holes or slots solid lubricant transfer to the friction surface and the friction surface to form a well-oiled, attached to a solid, uniform coverage of solid transfer film, greatly reducing friction and wear. With friction were embedded continuous supply of solid lubricant friction surface to ensure good lubrication of the friction pair of long runs.

Adjustable clearance design features of rolling ball bearings

The design features:

(1) manufacturing easy: Thanks to the adjustable intermediate links, so that parts of the process can be greatly relaxed tolerance zone size, the rejection rate also will drop exponentially. While reducing the accuracy of machine tools, the machining accuracy of machine tools in the general precision bearings possible. The technical level of the workers may be appropriate to reduce, with a certain economic benefits.

Convenient (2) assembling: the outer ring made after the split, you can easily adjust the radial wind power bearing clearance to the desired value, without the use of packet assembly method that is able to achieve high accuracy. Mounted on the shaft is also very easy to adjust without attaching other devices, simplifying the whole structure.

(3) to improve the situation by force: the double rows of rolling elements can increase the carrying capacity and can withstand axial force.

(4) reduce the types of parts: the outer ring made after the split, make rolling body covered in the fairway, so the cage can be omitted. This while reducing process, improve the carrying capacity, can be said to serve multiple purposes. Power Station Valve

(5) maintenance and repair easy: when the bearing clearance due to wear and tear caused by the ultra-poor, just appropriate to reduce the thickness of the shims can be reduced clearance, to restore the original accuracy, correspondingly prolong bearing life. In addition, when only the individual components of non-normal damage, can also be used to replace the damaged parts of the method to fix the bearing, or even the entire old as new, after all, a good way of reckoning. Deficiencies at 1.2

(1) increasing the inner cutting on the outer circumference, an externally threaded step. And easy to produce because of the presence of the thread stress concentration, while the heat 1P processing becomes difficult.

The axial dimension (2) of the flanged ball bearing is relatively large, and due to the randomness of the thickness of the adjusting washers have a greater volatility.

(3) for an outer thickened, so that an increase in material consumption.

Adjustable Rolling clearance presented here has the novel, reasonable structure, easy assembly, easy maintenance. Especially after the bearing outer ring from monolithic to modular axially split, so adjust the bearing clearance problems solved, for reference colleagues. The design can also be an extension of the idea to broaden to other types of bearing designs. The design of the case of non-standard bearing designs. There are many issues still need to explore deeper, deficiencies must be resolved. Truly eager to get peer guidance and help.

How to design an adjustable clearance rolling ball bearings?

Adjustable clearance rolling ball bearings design methods:

Rolling friction ball bearings for its small, start-sensitive, high-efficiency, high precision rotation, lubrication is simple, easy to replace and many other advantages and is widely used in the production and life. However, because the manufacture of high precision, complex process, the current standard of rolling bearings are used in jet production, by professional factory manufacturing. Since the original design between the spindle bearing inner ring, outer ring, rolling, etc. These rigid parts with little regard adjustable links, so important bearing precision index - the radial clearance depends mainly on machining tolerances to be guaranteed. Thus, even with a high precision machine to machine the bearing parts, due to the method of the inevitable accumulation of influence of the error, it is difficult to use directly by the assembly to achieve the required precision. Generally required by measuring the selection method with a packet assembler to assemble, but still finite precision, high prices make high-precision bearings. While bearing in the use of wear caused by the ultra-poor clearance can not be compensated, lowering real life, resulting in waste. With the development of production, the urgent need to address the technical issues. To this end, the author through analysis and research, to find the main factors bearing radial clearance precision. Then the structure bearing a reasonable design from the start, to design a new structure, the agricultural bearings radial clearance can easily be adjusted to solve the above technical problems. After trial, the better, are made with a brief introduction.

design ideas, works and concrete structures

As we all know, to adjust the bearing radial clearance, you must change the relative positional relationship between the outer ring, inner ring, rolling elements of these three, intuitive approach is to make the inner ring of the outside or inside of the outer ring can be varied as desired. In terms of ball bearings, a method in which prior machining of the bearing inner ring bore into a certain taper, while cooperating therewith are machined journal corresponding taper. Changing the position of the inner ring after assembly on the shaft of the attachment shaft, so that the outer diameter of the inner ring deforms to cause changes to adjust the bearing clearance. In all fairness, this is a better way, can solve this problem to a certain extent, it followed so far. But there are a few obvious shortcomings, namely limited adjustment amount (even very small), clearance on large powerless. Second, the journal to be processed at a higher precision taper, and the need to set up additional adjustment device, so that the axis of the complex manufacturing process. Third, the inner ring under a lot of prestressing, and for the circumferential tensile stress is extremely detrimental to the bearing strength, and sometimes even when adjusting inner "no war since the break." Thus, the traditional approach is not reasonable, a great need for improvement.

Bearing structure analysis shows that the inner part has already been done in this article, it seems no potential to be tapped. The rolling body is "monolithic" obviously "unprofitable." Naturally, we have to look to the outer ring up. But this part of it is simply another Jane, conventional thinking can not start them, must be another way. After wrestling, multi advice, repeated scrutiny, finally enlightened. Realized that: change the bearing radial clearance, like war, like, not only forced the onslaught from the front (radial), or you can take from the side roundabout clever (axial). Prerequisite is to break the traditional stereotype thinking imprison shackles and force of habit, to dare to innovate. It is a bold vision of the bearing outer ring along the cross-section cut, split into two (reverse thinking, reduced to complicated). About two and a half can make relative axial movement, and then by means of the interaction of specific surface and rolling fairways of the inner body, the relative axial displacement of the outer ring into a radial displacement of the rolling elements and thus receives indirect change within the effect of the radial position between rings, the outer ring, rolling three, to adjust the clearance purposes. Based on this, we can have the following technical solutions: the outer ring of the rolling bearing by-piece to the axial split modular, with double rows of rolling elements, combined with the adjustment shim set. Increase or decrease in the assembly by adjusting the thickness of the gasket to easily adjust the bearing radial clearance to the desired value, and finally coat with a threaded coupling assembly as a whole. Similarly, when working for some time after the bearing wear, but also just appropriate to reduce the thickness of the shims can easily eliminate bad clearance, to restore the original accuracy. To achieve the purpose of repairing.

The advantages of linear motion ball bearings

For linear motion ball bearing structure in the interior of the outer ring has a retainer (Click on linear ball bearing describes the installation configuration), the holder is equipped with more than one ball, and make infinite circular motion. Within two ends of the retainer spring retaining ring in each square ball straight track work force has a gap window. This section is subject to the load so that the ball rolling to make contact with the shaft. Relative movement with a very low coefficient of friction, and therefore linear motion ball bearings for machinery and equipment, automation equipment, energy-saving equipment such as the choice of the most suitable bearings.

Linear motion bearings, is being more and more widely applied to electronics, machinery, equipment, robotics, tools, machinery, food machinery, packaging machinery, medical machinery, printing machinery, textile machinery, machine tools, automobiles and other general or special machinery industry in.

Linear motion ball bearing advantages:

1. Because the flow of contact friction resistance and can start moving friction resistance is small, so you can save energy, easy to get a higher velocity.

2. Load increases, but not sensitive to changes in the friction coefficient, and therefore under heavy load, the friction coefficient is extremely small, and long-term accuracy of the same, we can get long-term mechanical life.

3. Linear motion bearings interchangeability, when the province to install and easy to use, and new mechanical structure, small size, the amount of light of the characteristics.

4. Out to save oil, simplify lubrication and maintenance purposes.

5. The two sides also applies additional bearing seal and dusty places or objects easily penetrated.