radial bearing a larger size, poor damping capacity

Ball bearings, roller bearings and needle roller bearings. High speed, load is small, requiring high precision rotation should use ball bearings; load is large roller bearings should be selected; loading large radial dimensions should be selected when they restricted needle bearing. Radial bearing rings of the inner and outer ring, inner ring and the shaft sleeve and often with the shaft rotates, the outer ring mounted in the bearing bore. Rolling rolling along the raceway rings, separated by the cage, to avoid friction between. Thrust bearings are divided into a tight circle and live ring in two parts. Tight circle and sleeve tight, live ring bearing in the bearing housing. Rings and rolling body with high strength, good wear resistance bearing steel, surface hardness after quenching should reach HRC60 ~ 65. Cage mostly made of mild steel stamping, and some copper alloy, bakelite cloth or plastic. Basic types listed in the table produced in China basic types of rolling bearings. Various types of rolling bearings is divided into B, C, D, E, G5 a precision. B is the highest accuracy level. G is the general accuracy level, the most common. High speed, there are strict requirements for precision rotation of the spindle, high precision bearings Special bearings should be used, such as precision lathes, milling machines, boring, grinding grinding, aircraft engine, turbocharger, precision instruments selected C, D grade; coordinate boring machine, High-speed grinding elect B, C grade. Rolling easy maintenance, reliable, good starting performance at moderate speeds higher carrying capacity. Compared with the sliding bearing, radial bearing a larger size, poor damping capacity, high speed, low life sound bigger. Rolling in the radial bearings (mainly radial force) usually consists of inner and outer rings, rolling and rolling element cage roller bearing  four parts. Inner sleeve in the journal together with the shaft rotates, the outer ring mounted in the bearing bore. In the inner and the outer periphery of the inner periphery of the outer ring are formed with raceway. When the relative rotation of the inner and outer rings, the inner and outer rings of the rolling element raceway, are separated by the cage, to avoid friction. Thrust bearings are divided into a tight circle and live ring in two parts. Tight circle and sleeve tight, live ring bearing in the bearing housing. Rings and rolling elements commonly used high strength, wear resistance, good bearing steel, surface hardness after quenching should reach HRC60 ~ 65. Cage mostly made of mild steel stamping, copper alloys can also be used bakelite cloth or plastic manufacturing

including for high-performance green building design

Northeast Asia, SKF roller bearing : SKF distribution center in Northeast Asia to start buildingSKF bearings sales center in Northeast Asia, SKF (SKF) in the northeastern part of Shanghai Waigaoqiao Free Trade Zone opened a new distribution center to start building. SKF start building distribution center in Northeast Asia marks, SKF Northeast Asia Pacific region initially built a global network, then, China and the entire Asia-Pacific region will be achieved within a shorter delivery time better delivery rate.
 SKF Northeast Asian distribution center, located in the Waigaoqiao Free Trade Zone in northern Haidong, with a total investment of about 100 million kronor. Will be fully bearing catalogue in 2013. SKF has a distribution center in Northeast Asia 30-meter automated storage and retrieval systems (ASRS) automatic storage center. SKF to open distribution center in Northeast Asia is also under construction LEED standards (LEED standards established by the U.S. Green Building Council, including for high-performance green building design, construction and operation of a series of rating system) for construction, SKF distribution center in Northeast Asia will Be SKF (SKF) first energy and environmental Design certification under (LEED) gold standards for the construction of warehousing center. 2011, SKF in the world with 11 meet LEED standards for construction projects started.LEED standard SKF distribution center in Northeast Asia, but also to strengthen SKF SKF's long-term commitment to environmental sustainability, which is also reflected in the SKF SKF recently implemented angular contact ball bearing zero (BeyondZero) strategies. SKF has a distribution center in Northeast Asia Logistics Group is the world's best methods of operation and the most advanced logistics infrastructure to better support the SKF Northeast Asia, dealers and customers, and with it, SKF will be shorter delivery cargo delivery period to achieve a better rate. SKF Northeast Asian distribution center will serve the entire northeast region, becoming SKF in North America, Latin America, Europe and Asia, which consists of regional distribution centers as part of a global network

Hunan Timken Company general manager

Hunan Xiangtan city leaders to guide the work of Timken CompanyTIMKEN TIMKEN roller bearing Company China Limited Hunan Xiangtan municipal leaders 2010.04.30 Tao , deputy inspector of new water Deputy Minister , Office Yuan Xihui City Code , City Code Office deputy researcher Wu Ming and other city leaders to Hunan Xiangtan Timken company guidance . Hunan Timken Company general manager , Mr. James Ai Gete water to guide the work of the new pottery reported Hunan TIMKEN COMPANY , and government leaders attach importance to and guide the company deeply grateful. Xiangtan City , Hunan Leading Tao fresh water to guide the work of Timken Company , said: "The government will be great support from the policy , the working group at any time improve coordination of services , the company provides a good investment environment . Provide good service for the enterprise , and effectively solve problems for them . "About Timken Company in Hunan : Hunan Timken China bearing manufacturer Company is the world's largest earlier this year by the United States, one bearing manufacturer Timken Company and Xiangtan Electric Manufacturing Co., Ltd. joint venture , mainly the production of large wind turbine drive spindle Timken bearings , located in Xiangtan high-tech Zone industrial Park in Germany , is the Timken in China 's first six plants. (Timken bearings distributor in China Editor )

With the rising fuel efficiency of cars on demand

 JSAE Paper Award for outstanding scientific .1951 by the Japan Society of Automotive Engineers was founded in order to enhance achievements in the field of automotive. NSK to the "temperature on the toroidal CVT transmission analysis" as the theme of the paper better articulated and demonstrated NSK CVT transmissions to improve fuel efficiency point of view, therefore, the solution NSK won JSAE Angular contact bearing scientific paper award.  With the rising fuel efficiency of cars on demand, there is a greater transmission efficiency of large-scale motor vehicle continuously variable transmission and a corresponding needs. NSK to the "temperature on the toroidal CVT transmission analysis" as the theme of the paper, the purpose is to help in the calculation and verification of the proposed increase in temperature toroidal CVT transmission with a standard formula for empirical data to help predict toroidal CVT gearbox transmission efficiency more accurately in further improve vehicle fuel efficiency measures thesis literature. And NSK Pacific Convention Center in Yokohama, Japan on May 19 to 21 on the Automotive Engineering Exposition held roller bearing the toroidal CVT transmission, highlighting NSK transmission technologies to improve fuel efficiency. NSK won the 60th JSAE Paper Award is outstanding scientific NSK transmission technology research in the affirmation that we provide will enable NSK NSK Bearings more efficient products and services, as well as a product manufacturer NSK, will further reduce the realization of energy losses contribute to global sustainable development

"When 15,000 people sitting in the center court area

"When 15,000 people sitting in the center court area , we may encounter unpredictable winds and other weather conditions, bearing on the open roof support is critical . Safety, reliability , low maintenance requirements of this project is particularly important. bearing life of 20 years to 25 years between the bearing grease lubricated to ensure easy maintenance and has a long service life . "Salthouse added.Salthouse said Mr. Schaeffler UK technical support
roller bearing mounting typical example is to provide guidance . " Schaeffler UK engineers provide comprehensive advice and guidance , greatly accelerated the assembly process ." Salthouse said.Attachment: Wimbledon Centre Court introduced a new retractable roofRoof both open or closed can provide robust and secure ( does not slip ) of the venue. In the closed position , the natural light through the translucent roof exposure to the grass in any adverse weather conditions can play a protective role on the grass . Roof design itself as " collapsible hexagonal design ", when not using the roof , the roof can be folded into a high compression zone. Even the roof closed, the roof can also create a transparent "open" feeling. The entire roof area of ??5200 square meters, developed by a special waterproof material , very strong and full of flexibility. The key elements of the roof design when the roof is in the closed state, a lot of natural light can be irradiated to the grass. Airflow system from the closed space of the condensation detached , so as spectators and players and provide a most comfortable environment inside .Retractable roof comprises a total of nine base plate is divided into two parts: one is 4 , and the other part of the 5 . On either side of each plate are fixed with angled steel . There are 10 frames across 77 meters of the stadium . Each steel wheels supported by a set of ports can be installed in the center court along both sides of the China bearing manufacturer move . Ready to close the retractable roof , the northernmost part of the stadium to keep the folded state , parked in another part of the southern end . To ensure the accuracy of the roof moves , you need to install a high-precision electronic actuators, servo motor and rocker synthesis system . This system will separate the steel , while steel between the upper and the steel parts of substantially begin until the two parts of the top center of the pitch joints combined stacked flat . Steel is installed on the bottom of the hinge a number of similar components. Schaeffler FAG spherical roller bearings assembled in these hinge . These bearings due to friction is small, and can be carried out right kind of compensation is selected. These bearings are grease lubricated through high-performance , during use, requires minimal maintenance

ot exposed to external weather conditions

FAG spherical roller Roller bearing are used in new Wimbledon Centre Court retractable roofLift the Wimbledon Centre Court , and perhaps someone knows , but you notice the stadium roof , Wimbledon Centre Court retractable roof of a new major feature is translucent, retractable roof , this is how a unique creative roof ah , but this decorative building structure , there is an important role in the structure responsible for its open or close in ten minutes , what is it ? Closer to home, the open and close are inseparable FAG row radial ball roller bearings in this retractable roof is equipped with 300 FAG radial spherical roller High speed bearing and spherical roller thrust bearings, FAG bearings to ensure these stadium roof within ten minutes in the open or closed.Schaeffler for the project provided a total of more than 300 bearings. These bearings consist of fag-aligning roller bearings , mainly used for supporting both ends of the roof arch hinge radial load and thrust roller bearings for supporting the roof of the cable taut expand the axial loads. Provide maximum self-aligning roller bearings, an outer diameter of 200 mm , can withstand 300kN (30 tonnes) standard radial load , mainly used at both ends of the arch bracket hinge . Thrust roller bearings will assume approximately 600kN (60 tonnes) of the axial loads that are supported by the support structure and roofing materials arched cables produced .Since the bearing is completely sealed in the hinge group, not exposed to external weather conditions . In other words, Schaeffler can choose from standard products, bearings, its easy to use and offers . These bearings are filled with high-quality internal grease when the roof is expanded , and in the center of the stadium at the top is closed, the top of the dome architecture designed to help building forces from wind, rain , snow pressure.

Vibration bearing vibration group selection

Vibration bearings and plain bearings of the different characteristics

    1, Appearance Features
    Vibration bearings:
    A. rolling diameter increased, the rolling body length increased.
    B. outer rib cage guided by the roller, the roller to reduce the force.
    C. Use of the inner wall to guide roller, roller improve functioning.
    D. cylindrical roller bearing cage with the overall structure, strength greatly increased.
    E. aligning bearing hole diameter tank design, lubrication effect.
    Plain bearings:
    A. roller bearing diameter and length of the rolling elements are small.
    B. cage with rollers or inner guidance.
    C. Cylindrical roller bearing cage using rivet structure, easy to loose, out cover.
    D. aligning bearing no sump hole diameter, lubrication poor results.
2, the choice of materials
    Vibration bearings:
    A. inner and outer rings and rolling bearing steel vacuum degassing, good fatigue resistance.
    B. cage aluminum manganese bronze material, high strength, good elasticity, abrasion resistance better.
    Plain bearings:
    A. inner and outer rings and rolling with common bearing steel.
    B. cage made of zinc brass, low strength, poor flexibility.
3, heat treatment
    Vibration bearings:
    A. inner and outer rings using shell - Ma Ma mixed hardening or quenching and tempering, uniform hardness, internal stress; toughness, shock and vibration.
    B. In the temperature less than 150C when working stability.
    Plain bearings:
    Inner and outer rings using ordinary quenching method, poor toughness, shock and vibration performance is poor, poor thermal stability.
4, tolerances and manufacturing process
    Vibration bearings:
    A. strict accordance with the P6 class precision manufacturing standards, especially in inner diameter tolerance is very small.
    B. ball size ≤ 0.002 Difference
    C. Cylindrical roller diameter of a convexity practice, to avoid stress concentration.
    D. rolling surface ultra-precision processing, smooth finish.
    Plain bearings:
    A. General PO level precision tolerances (part P6 class standard) manufacturing.
    B. rolling grouping ≤ 0.005.
    C. Cylindrical Roller without convexity practice.
    D. Part raceway only for polished finish low.
5, the internal clearance
    Vibration bearings:
    Clearance by mechanical vibration requirements of production, range control in a small range, and good consistency.
    Plain bearings:
    Clearance generally based on the standard group or group C3 production, clearance, or small, or range, discreteness.
6, using the results
    Vibration bearings:
    Low noise, low temperature rise, good stability, long life, no early fatigue.
    Plain bearings:
    Noise, temperature rise, stability is not good, life is short, there is the phenomenon of early fatigue.

Bearing vibration group selection

       With the bearing manufacturing technology has improved continuously, reflecting the dynamic performance of the bearing vibration and noise are increasingly valued by the people. Users of the bearing vibration and noise awareness of the technical characteristics are also increasingly sensitive requirements are also increasing.
     Bearing vibration refers to the geometric center of the bearing part is the instantaneous deviation from an ideal position moves, bearing parts with time-varying elastic deformation, and other rotary motion bearing all the movements necessary, known bearing vibration.
     For a single bearing vibration testing, currently using two units of measurement. One for Acceleration, which is measured in decibels (dB), category code Z1, Z2, Z3; another type of speed, which is measured in microns / second (um / s), group codenamed ZV1 , ZV2, ZV3. These flags bearing vibration group bearing the supplementary code into basic code on the right.
     Bearing vibration and noise are closely related, because the vibration source of the noise, the noise is vibration characterization, so in bearing manufacturing and testing process, through strict control of the bearing vibration value targets, to achieve the purpose of bearing noise control.
     In the choice of bearing vibration constituencies, must be based on the specific use of the bearing conditions. If the host for smooth operation have special requirements, you should choose more appropriate bearing vibration group to meet and achieve the smooth operation of its provisions, such as machine tool spindles. Of the bearing vibration and noise are a requirement, such as cars and aircraft, the same should be used in the corresponding bearing vibration groups in order to achieve the requirements. The noise of the bearing with special requirements, such as electric fans and some other appliances should be used with low noise bearings, in order to meet the requirements.

The main factors affecting bearing vibration

      By the bearing structural design parameters determined by stiffness, flexibility, quality, and damping vibration system constituted under the operating conditions will produce adapt to its mechanical vibrations.
      Manufacturing process of the deviation caused by vibration, the smaller the deviation, vibration is smaller. Surface of the ball roundness, waviness, surface roughness of the bearing part of the most influential factor of vibration, followed by the inner and outer shape of the channel error and surface roughness, cleanliness and again is the bearing lubricant quality.
    Operating conditions, such as installation conditions, speed, direction of the axial load borne by, for money.

Cross roller bearing raceway gears and repair

Commonly used in the manufacture of gears with steel quenched and tempered steel, hardened steel, case hardening steel and nitriding steel. Slightly lower than the strength of forged steel, commonly used in sizes larger gear; poor mechanical properties of gray cast iron can be used for light load of open gear drive; ductile iron can partially replace the steel gears; multi-purpose plastic gear at light load and low noise requirements of the place, with its paired gear generally good thermal conductivity of steel gears. Once the gear wear, how to fix next described in detail.

Crossed roller bearing Gear Repair:

The best way to go is to measure the wear of the ring gear worst damage teeth, the gear module to ensure the same case, by calculating, re-hobbing, negative change of the gear position, the same, the gear unit associated with it The output pinion positive displacement, in order to ensure that the two gears meshing center distance constant, a pair of gears to high displacement. Followed by the corrupted repair worn teeth first with liquid plastic or surfacing and leave allowance, then hobbing to its original size. To ensure that the original transmission parts and spare parts (such as the output pinions, etc.) can be used again, the need to ensure the same gear center distance of tooth repair, using the method of surfacing reprocessing.

Raceway Repair:

Four raceway formed by the diameter of the square cross-section, the diagonal perpendicular to the ground, that is, each raceway by both the overall cross-sectional diameter of the center line of a 45 ° angle, the raceway surface damage is more serious, oval-shaped, with a flange ring and the annular surface dents to the front indicated baselines grinding raceway surface (due to high surface hardness), by measuring the roundness deviation of 3mm, after grinding, measuring hardness, were HRC30 ~ 40, in order to ensure a 45 ° angle, special production model (see figure II) is used to measure angles. Raceway surface-hardening, quenching hardness HRC55 ~ 60. Then again grinding.

Raw material roller press bearing damage cause analysis and maintenance recommendations

In the dry process cement production line process, the raw material has been widely used roller press, and has made considerable economic and social benefits, a significant increase of its energy-saving effect is also recognized by the majority of manufacturers to use. But in the course of its use, the bearing life is short, damage and replacement process cycle is long, costly, labor-intensive, but it restricts the normal operation of the rotary kiln.

My company put into operation by the end of 2012 the two 4500t / d clinker production line, run until June 2003, four sets of Chengdu Lijun Industrial Co., Ltd. manufactured CLF180-120 there have been varying degrees of roller presses the problem of high bearing temperatures, 7 mid-May the 2nd roll maneuver near the gear side roller bearing damage. Total running time of 2041 hours, the service life of less than three months.

First, the device pre-operational status

Roller press run early bearing temperature between 50-60 degrees, there is no abnormal noise, bearing grease used by the U.S. Castrol brand Molub-Alloy 777-2 ES model roller presses grease, the amount of fuel in strict accordance with equipment manufacturers Requests the Executive. Five to six months, there have been several cycles of water blockage, resulting in bearing temperature up to 70 degrees. In mid-June, found that the lower part of the inner bearing oil outlet circulating water discharge phenomenon occurs suspected side of the bearing end cap rupture caused by cooling water, then turn off the inside of the circulating water, the new grease replenishing the oil discharged into the roller press production. In early July, roller presses the bearing temperature has been hovering around 55 degrees to 75 degrees, for various reasons during the roller press is always open to open the stop, there have been more than 24 hours continuously feeding situation. July 10 start, roller press repeatedly appear continuous feeding more than four hours on account of the temperature exceeds 75 degrees to stop jumping. July 12 greaser checking the oil discharge roller press discovered the bearing fragments. Determine the bearing roller press has been damaged. Since the roller press has been put into the roll gap deviation, pressure instability. Deviation due to the roll gap gauge, pressure gauge, the width of the roll gap and other factors frequently exceeds the limit mediation, there have been almost no more than 48 hours continuously feeding situation.

Second, the disintegration of the investigation bearing damage

After the demolition of the roller press gearbox bearing cap open and found that there is a rift bearing outside diameter, a broken ball bearings, inner and outer diameter with five out of crack, the bearing inner and outer raceway badly worn bearing retainer wear . Bearing cap surrounded by circulating water cooling on both sides have two brass compression fracture phenomena, round copper tubes are flattened, leading to fracture, width of about 100mm. Check the other side of the roll maneuver roller bearings, intact, the bearing clearance of 0.75mm, within the normal range.

Third, bearing damage cause analysis and improvement

1 First, bearing life is too short not to troubleshoot and manufacturer of quality bearing assembly itself, but should also work with bearing operating conditions in harsh environments and have a great relationship.

2. Bearing thermal design flaws. Such a large bearing operating process will produce a lot of frictional heat, so that both sides of the bearing cap manufacturer designed circulating path, the heat generated by the bearing grease and the case conduction through the cooling copper tube absorbs heat water circulating outflow apparatus body, lower bearing temperatures. But it cooled copper mounting position is unreasonable, bearing swing too easy to squeeze into the brass, brass deformation caused by blockage, fracture, loss of cooling effect. To avoid copper tube is extruded, only increase the gap between the copper and the bearing, to ensure a greater swing bearing free space, which requires manufacturers to redesign, production bearing cap or another design a cooling device.

3 brass water lead to rupture of the rear bearing lubrication failure, it could be this short bearing life is an important factor. Equipment inspection work found during the inspections bearing lower discharge port has water leakage, immediately made a report, but this is not possible in the cooling copper pipe break after the first time discovered. Since the bearing inner brass cap by squeezing fracture, circulating water entering the bearing, destroyed the environment lubrication, the bearing balls and the raceway serious friction generates a lot of heat, bearing balls and the diameter of each component such damage.

4 brass frequent clogging cooling and design too small, poor cooling effect also affect bearing life. Cooled copper diameter is too small, the circulating water and debris clog adhesion brass scale deposition in the roller press often occurs during operation bearing high temperature, inlet and outlet brass examination revealed multiple blockage, affecting the cooling effect, the final installed at the inlet Y-strainer before easing clogging.

5 roller presses the material into the inadequate control of particle size, diameter 200mm super chunk too, long nip large deviations, corrective frequently lead to bearing overload and shorten the service life. Initial production mining crushing, crushing machine safety door is not well controlled, resulting in more than 150mm above the individual particle size of limestone blocks into the next process, clogging the feed opening roller press, leading to uneven feeding, causing the roll gap large deviations, and even lead roll sewing too large equipment mediation. Granularity than 100mm rigid material frequently enters roller presses, roller presses squeeze in an instant when all the large reaction force bearing on the bearing itself, the life of the bearing caused a fundamental impact. Improved granularity of limestone, sandstone and clay crusher materials and faulty phase continued up to more than two months, no broken, large water through the bypass feed materials into the roller press feeding system, more than 250mm above the chunk size is almost Each class appears stuck roll gap, resulting in the roll gap width gauge mediation. This is the roller press operation there have been no more than six months more than 48 hours continuously feeding the root cause.

6 There is no steady flow positions periodically removed materials, excluding enrichment metal, so that the device frequently overloaded mediation affect bearing life. Material into the roller press is impossible to avoid the presence of metal objects and accumulation roller presses the original width of the roll gap of about 20mm, 70mm roll gap will exceed the overload relief, less than 50mm metal objects will only increase the roll surface wear, greater than 50mm size metal objects or materials into the roller press is too large, it will cause the rollers instantly generate excessive impact force, resulting in the roll gap than 70mm, the pressure exceeds 15MPa, exceeds the bearing load limits, the control system will suddenly roller press release pressure or mediation. Especially metal roller presses will cycle loop in the roller press greatest harm. So they requested that must be periodically clearing, clearing accumulated in the roller press metal objects within the system, reduce or avoid damage to equipment, particularly bearing.

7 hidden when the hydraulic system is now hidden, long-term bias is serious roll gap. As the hydraulic system problems, often lower than the pressure roller presses the side of the working pressure, both sides of the roll gap large deviation hydraulic pump long-term frequent correction, resulting in roller presses the bearing operating conditions poor, heavy load, the service life is reduced.

Fourth, the late running Precautions

Roller press bearing life is short, equipment failure rate is the current cement industry a common problem, through analysis of the above reasons, the production process management is a top priority, as long as control the granularity of the material into the roller press, regularly scheduled clearance, reducing metal roller presses against the probability of overload damage to the bearings, excluding hydraulic system problems, eliminating the long-term bias roll gap phenomenon, problem solving partial cutting, take care of the bearing uniform force. As long as the above points, improving the operating environment of the equipment, the equipment can operate normally, to extend the life of each part, in order to improve the operation rate.

Methods to improve the accuracy of precision bearings

In order to improve precision roller bearing with precision the actual installation, you must not make use of the bearing deformation measurement methods and measuring tools, precision bearings and cylindrical bore size of the mating surfaces of the actual precision measurement can be related inner and outer diameters All measurement items to be measured, and the measured data to make a comprehensive analysis of this as far and precision worthy of shaft and housing bore bearing mounting portion size. In actual measurements made with the respective shaft and housing bore size and geometry should be the same with the measuring bearing temperature conditions.
To ensure the effect of a higher actual mating shaft and the bearing bore to match the surface, the roughness should be as small as possible.
In making these measurements, should be cylindrical and the bearing bore, the housing bore and the shaft, and a corresponding surface of the chamfered sides near the assembly, respectively, showing the maximum deviation to make the direction of two marks, so that In actual assembly, the mating alignment of both the maximum deviation of the same position, so that after assembly, the two sides can be partially offset by the deviation.
Directional signs made two aims can compensate for deviations into account, even if both sides supporting each rotation accuracy improved, but also between the two bearing seat hole and both ends of the journal concentricity error partially eliminated. Surface hardening on the mating surfaces to implement measures, such as sandblasting, with a diameter slightly larger than the precision plunger plug holes, once inside, there is help to improve the fitting accuracy.

Bearing Noise Remedy

Bearing materials metallurgical quality affect the bearing early failure of the main factors. Followed by metallurgy technology (such as bearing steel vacuum degassing, etc.) to improve, improve the quality of raw materials. Raw material quality factors in the overall eccentric bearing failure analysis in the proportion has decreased significantly, but it is still bearing failure is one of the main factors. Appropriateness of the selection is still bearing failure analysis of the factors that must be considered.
The main task of bearing failure analysis is based on a lot of background material, analysis of data and failure modes, find the cause of failure of the main factors roller bearing for targeted improvement measures are proposed to extend the self-aligning roller bearing service period, to avoid occurrence of unexpected early bearing failure.
Bearing vibration effects on the bearing failure is significant. Example: peeling, dents, rust, cracks, wear, etc. will be in ball roller bearing vibration detection reflected so through the use of special overall eccentric bearing vibration measuring devices (frequency analyzer and vibration instrument, etc.) can measure the size of the vibration frequency distribution can be inferred by the details of the abnormal vibration of the measured values ​​due to the use of INA Bearing premise or sensor mounting location is different for each machine so requires prior analysis and comparison of the measured values determined after judgment scales.
1, reason: overall eccentric bearing low precision approach: use specified levels of precision bearings
2 reasons: Spindle bore different heart bent or box method: Fix spindle or cabinet
3 reasons: belt too tight: Adjust the belt so that the appropriate tightness
4 reasons: poor lubrication Methods: provide grade lubricating material and properly cleaned
5 reasons: the low quality assembly methods: improving the quality of assembly
6, reason: bearing housing laps: Replace worn bearings and related components
7, the axial force is too large Methods: cleaning, alignment ring seals the gap between the requirements of 0.2 ~ 0.3mm, correct impeller balance hole diameter and the checksum value of static equilibrium