TIMKEN bearings thermal power industry applications

 We know that the thermal power industry are generally more harsh environments such as mill equipment must be dust pollution, high speed operating environment in order to avoid issues such as maintenance and downtime , so its relevant components of the device is quite high technical requirements especially spherical roller bearing and other components required quality and performance is outstanding , Timken Company, as many years of thermal power industry suppliers , and how to meet the requirements of the thermal power industry customers do ? Timken bearings distributor in China will take you to see this TIMKEN spherical roller bearing thermal power industry applications.
Thermal power industry an important machine mill , and mill roller bearing on the working environment is dust, high temperature low and insufficient lubrication of the environment, this has led to coal grinding equipment gearbox mounting or improper lubrication and reduce efficiency , Timken bearing thermal power industry in order to help solve these problems , the accumulation of years of experience under TIMKEN bearing technology has developed a lot in this regard Timken bearing products such as Abrasive bearings , DuraSpexx power density range of bearings and solid lubricated bearings. This column bearings can be used in harsh operating under production conditions , and the ability to extend the equipment uptime , which help customers improve the mill , gear boxes, and air preheater , conveyors and other equipment performance.

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

Timken Wind Energy Manager Doug Lucas

Timken through Germanischer Lloyd Wind Power Industry Technology Certification Timken bearings distributor in China Timken company learned from the United States, May 26, Timken global operations through technical monitoring authority Germanischer Lloyd Wind power industry technical certification, Germanischer Lloyd Wind power industry technical certification is a Timken Ball bearing company technology and wind power wind turbine condition monitoring system the best explanation.It is understood that representatives of Germanischer Lloyd last year visited Timken Company is headquartered in Canton, Ohio, technical center and near Fairbanks Crest steel mill. Used for the wind power industry dynamics Timken tapered roller bearings and cylindrical roller bearings rated load and bearing life test performance affirmed.
 Timken Wind Energy Manager Doug Lucas, Mr. Timken through Germanischer Lloyd in the wind power industry technical certification spoke: "Germanischer Lloyd certification is for us for the wind power industry TIMKEN bearing a technical assessment of the reliability of prove our wind power industry has a bearing more reliable than other brands, more extensive product design, we can achieve a longer Special bearings life, while reducing the wind power industry and lowering Chen. " Germanischer Lloyd Certification is Timken's proprietary Syber advanced system and bearing fatigue life testing, continues to this day for decades validation, Timken bearing various types have the ability to wind turbine bearings for the global wind power Timken industry to provide more  About Germanischer Lloyd: Germanischer Lloyd has 140 years of history, the ship testing, research and improvement of security is a world leader. In the field of wind power, wind energy Germanischer Lloyd Industrial Services department is mainly provided from materials, parts, machine to wind farm inspection, certification and other services.

the Japanese bearings, automotive products

NSK established a joint venture with Toshiba Corporation2010.10.29 NSK distributor in China editor, recently, the Japanese Big ball bearing, automotive products, precision machinery parts, and machinery and electronics products manufacturer Seiko Co., Ltd. (NSK LTD.) And the world's top 500 industrial, mechanical and electrical industries in Japan relatively large monopolies Toshiba joint venture company established ADTech automotive steering systems. ADTech joint venture total investment of about 500 million yen, about 60 employees, the main objective is to develop an effective integration of NSK, electronic, mechanical, and other vehicle safety technology experience and Toshiba advanced electronics and software technology automotive steering systems. NSK and Toshiba hopes that the demand of the system as the number of green vehicles increases, because, compared to hydraulic power steering, electric power steering system is more energy efficient. NSK established a joint venture with Toshiba ADTech NSK Steering Systems, the joint venture will own a 51% stake, while Toshiba will occupy a total investment of 200 million yen ($ 2,480,000 aggregate) 49% of the shares. About NSK NSK China introduce and Toshiba Corporation: Seiko Corporation of Japan (NSK LTD.) Was founded in 1916, is Japan's first domestic design and production of angular contact ball bearing. For decades, NSK NSK developed countless new bearings, to meet the needs of users around the world, and for industrial development and technological progress have made a great contribution. NSK also by virtue of its precision machining technology, continuous development of automobile parts, precision machinery components, precision products, electronic applications in the field of active diversification. Toshiba Corporation is a Japanese multinational companies. Japan's relatively large electromechanical industry monopoly. Predecessor was founded in 1875, Tanaka Seisakusho. 1893 was renamed Tokyo Shibaura Seisakusho. 1934 and Tokyo Electric Company merger, said Tokyo Shibaura Electric Company. Headquartered in Tokyo. Toshiba Corporation is closely related with the U.S. General Electric Company. The company's products very much, mainly in the heavy electrical equipment, industrial electronic equipment and electronic components, consumer electronics and other products. 1970s to develop atomic energy, ocean development and space development and other industries.

NTN bearings distributor in China with customer-oriented sales

 NTN NTN Big ball bearing distributor in China is the world's integrated manufacturer of precision machinery, NTN Bearing is the world's fifth-largest supplier, in 1918, Mr. Niwa (Noboru Niwa), located in Kuwana, Mie Prefecture Kuwana-gun cho rise within the [West Park Rail workers are] began to study and production of ball Ball bearing company, NTN Corporation and later by the first letter of his name names. Established until 1960 produced by Toyo Bearing Iwata. Began mass ball bearings. 1989, changed its name to NTN Corporation. 2000, NTN Bearing Group's products all passed the ISO 9000 series certification. NTN bearings distributor in China with customer-oriented sales philosophy get more customers. Meanwhile accurate and timely manner to meet the needs of enterprise customers nationwide. NTN bearings distributor in China sales of imported NTN NTN products are trading company in Hong Kong to provide, its quality and quality won the praise of customers in China, the region has a large market share. Provide a variety of products from ball bearings, roller bearings tapered roller bearings to the different categories. NTN Bearing products include deep groove ball bearings, small and miniature ball bearings, self-aligning ball bearings, angular contact ball bearings, cylindrical roller bearings, tapered roller bearings, self-aligning roller bearings, thrust bearings, special and multi-functional use bearings. NTN bearings are widely used in various automotive, OA office equipment, industrial machinery bearings and some special areas such as environmental and food hygiene.

"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

Belts, bearing wear abnormal sound.

Discrimination power, transmission line fault causes abnormal sound
Car work sound vibrations of the system referred to as the sound of cars, many failures are manifested through abnormal noise, abnormal sound is phenomenal, the fault is the essence. If not timely troubleshooting can easily cause significant mechanical accident.Automotive common abnormal sound can be divided into powertrain abnormal sound, abnormal sound transmission system, driving system abnormal sound, drag abnormal noise and other categories.
1, powertrain abnormal sound
Failure occurred mainly in the engine and its related components, abnormal noise with the engine speed and change, and the frequency is higher.a. Off-cylinder engine misfire.
b. Decrease the efficiency of the engine lubrication system caused by excessive friction parts.
c. spherical roller bearing, bearing wear abnormal sound.
2, abnormal sound transmission systemDriveline abnormal noise often comes from gearbox, differential, clutch and other components with abnormal sound gear and clutch showing a significant change in status change.3, the driving system abnormal soundDepartment of abnormal noise and driving car driving status (speed, steering) are directly related.4, the drag noise
Vehicle reaches a fixed value abnormal sound obvious, speed decreases abnormal sound disappears. Mentioned here non-normal drag caused abnormal sound. Such abnormal noise caused by the flow separation around the body Special bearings changes generated noise. Specifically including cavity resonance, noise catheter tube and the antenna, wiper, mirrors and other accessories vibrations caused spoiler. Seal open, plastic parts can cause rupture of the exterior curve changes caused by traveling to the high speed air spoiler form abnormal sound.

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.

Steel is installed on the bottom of the hinge a number of similar components.

Retractable roof comprises a total of nine ball bearing manufacturer 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 track 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 Slim bearing 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

Since the bearing is completely sealed in the hinge group

 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 slewing bearing manufacturers is completely sealed in the hinge group, not exposed to external weather conditions . In other words, Schaeffler can choose from standard products, bearing catalogue, 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.

         Schaeffler UK product support engineer Derek Peasley , Mr. Tsang and Street CraneXpress company's engineers work closely together. He said: " We are very pleased with the Street CraneXpress company in this prestigious project together from the design process, we have the company's professionalism impressed , we are convinced that the selected bearing in this grim application environment, good performance . "

To achieve these goals

 Even for experienced plant manager, the construction of new power plants or existing plant operators are likely to be a big challenge. Must achieve and maintain optimal security, reliability and availability. To achieve these goals, we must develop a reliable and cost-effective maintenance plan, usually need to limit the number of personnel and expenditures. This requires an organized, dedicated integrated equipment reliability (IER) program, which the plant's CMMS or EAM system seamlessly to the existing number of personnel and technology will be able to manage.SKF Bearing Company of the thin section ball bearings of integrated equipment reliability program
To bring best practices knowledge Experiences using other plants Development of cost-effective PdM activitiesIntegrated hardware, software and data configurationSmall impact on staff Rapid results Use of existing tools and techniqueSweden SKF the roller bearing company Applications integrated device reliability program case:In the 15 plants have 27 coal and gas supply companies operating unit is facing reliability and performance issues. The goal is to reduce equipment failure, appropriate centralized maintenance resources. SKF has developed a proactive maintenance program, focusing on critical equipment planned maintenance and major failure mechanism. As more attention to the task of those states to monitor and eliminate unnecessary tasks, the plant reduced maintenance costs, SKF Bearing solutions and improve the availability and reliability.

Germany FAG Bearing Group Automotive Division: skilled

Schaeffler Group's three active Division
        With FAG, LUK and three strong brands INA Schaeffler (Germany FAG bearings) Group, its mainly active in the automotive division, industrial and aerospace division Division.  Germany FAG Bearing Group Automotive Division: skilled, powerfulSchaeffler Group's largest customer is the most important automotive industry, about 60% of the slim bearings Group's sales from the automotive industry, the Schaeffler Group, as an almost all major automobile manufacturers and suppliers a reliable partner, FAG bearings Group Automotive Division for the entire drive train, passenger commercial vehicle engines, chassis, transmissions and other parts units and suppliers to provide the most professional knowledge and innovative ideas and products. Germany FAG Bearing Group spherical roller bearing Division: aerospace equipment and aerospace manufacturing partner of choice Germany FAG Bearing Group Aerospace Division to support the development and production of special bearings for aerospace applications. Almost all aircraft using modern techniques to accomplish FAG Bearings, FAG is to become the world's leading technology development partners helicopter manufacturers and suppliers.

Tapered roller bearings is the largest amount of single row tapered roller bearings

Tapered Roller Bearings defined Alibaba mechanical 2012-03-19 Source: Alibaba mechanical information themes: mechanical printing machinery] [Alibaba tapered roller bearings can be separated from the inner ring with roller and cage assemblies and components outside ring can be installed separately. Roller and raceway contact at the contact line can reduce the stress concentration. Tapered roller bearings can withstand high radial and axial load. The tapered roller bearings can only pass one-way axial load, so as to pass the opposite direction of the axial load on the need install another with symmetrical tapered roller bearings.
Tapered roller bearings is the largest amount of single row tapered roller bearings. In the car's front wheels in recent years to spend the small size of the double row tapered roller bearings. Four tapered roller bearings used in large-scale cold high speed bearing mill and other heavy machines.
Single row tapered roller bearings have an outer ring, the inner ring and a set of tapered roller by a box-type cage into an inner components. Outer and inner component separation, tapered roller high speed bearings according to ISO standard dimensions, any standard model of a tapered roller bearing outer or inner component and the outer or inner components of the same model to achieve international interchangeable. Except that portion of the outer ring of the same model dimensions, tolerances must comply with ISO492 (GB307) requirements, the cone angle of the inner components, component cone diameter must also comply with the relevant provisions of the swap.
Typically, single row tapered roller bearing outer ring raceway of the cone angle of 10 ° ~ 19 ° before to be able to withstand the load and radial load bearing joint action. Cone angle larger axial load capacity are greater. Large cone angle of the bearing, post code plus B, cone angle between 25 ° ~ 29 °, which can withstand greater axial load. In addition, single row tapered roller bearings can be adjusted during installation size of the clearance.

Three crowned as the world 's most ethical companies list

The Timken Company always adhere to the quality of corporate brand competitiveness
The Timken Company is a corporate bearing corp named after the founder's family . Only products that meet the quality standards of the company , will be engraved with the Timken brand. As a global leader in Industrial Technology , The Timken Company has always believed that corporate brand reputation and glory of the family , is equally important.
Adhering to this concept, located in the national high-tech zones Xiangtan Iron Mu Kenxiang electricity ( Hunan ) Bearings Co. , always practicing , practicing corporate core values. Recently, the reporter visited the company's general manager Mr. Zhong Zhiyong .
Quality is the key to maintaining the competitiveness of products
"Quality is a core value of The Timken Company , is one of the cornerstone of our brand promise ."
Timken has a unique quality management system TQMS, production globally consistent quality product , whether it is in the United States , or in Europe or China . Xiangtan plant products have passed the certification Timken brand , which means that we localize the overall quality management system of Timken 's global headquarters recognition ."
In addition, Xiangtan plant also passed the ISO9001 quality management system, ISO14001 environmental management system, OHSAS18001 occupational health and safety management system certification.
" Compared with these certifications , Timken 's own strict quality management system to many , the assessment points turned over several times , and our products must meet strict quality system that can only be delivered to the customer ."
Three crowned as the world 's most ethical companies list
March 12, 2013 , more than 100 countries around the world 36 sectors of the many companies, high speed bearings in commercial practice and adhere to abide by the principle of good faith has played an exemplary role , Timken 3rd boarded the U.S. Ethisphere Institute released " world's Most ethical Companies list ." U.S. Ethisphere Institute (EthisphereInstitute), is a commitment to advancing corporate governance, risk management, sustainable development , compliance and business ethics best practices in the field of international institutions .
For this award , Zhong Zhiyong very identity . Because they each do one thing they have to consider: how local laws and regulations is required ? Compliance is a prerequisite for survival , also in line with the core values ​​of Timken 's first ethics and integrity .

Schaeffler in Suzhou Industrial annual dealer meeting held in 2013

The theme of "intensive farming? Total development" Schaeffler Greater China 2013 annual dealer meeting industry located in the beautiful Jinji Lake in Suzhou hand pallet trucks Hotel was successfully held. Schaeffler AG, member of the Executive Committee, President of Schaeffler Group Industrial Robert? Shulan President (Mr. Robert Schullan), Schaeffler Asia Pacific President and CEO, Greater China Managing Director and Industry Division President Pack Yu Mr Tudor (Mr. Udo Bauer) and other company leaders and hundreds of dealers partners attended the meeting.
Around the "intensive farming? Total development" theme, from Schaeffler headquarters, the Asia-forklift jacks region as well as the leadership of the Greater China business development respectively Schaeffler, the current market situation, to face the opportunities and challenges, channel development strategy , dealer management policies as well as the application of new products and technologies such as reseller partners concerns were wonderful keynote speech, and dealer partners raised expectations. In order to jointly cope with challenges of the market, improve the comprehensive competitiveness of dealers, Schaeffler first dealer partners to share the business operations management experience and after-market business development of practical experience.

technology development and production at the coincidence is very limited

ubrication systems Lincoln Industrial new membersSKF China distributor in Sweden SKF Group global video conference that, SKF lubrication systems to expand the U.S. aftermarket and increased SKF company in North America and Asian markets and enhance market coverage SKF's production capacity, and determine its lubrication system increase in membership - Lincoln Industrial.
SKF thin ball bearings distributor in China, according to introduction, SKF Group will be $ 1 billion cash acquisition is headquartered in St. Louis, Missouri, United States Lincoln Industrial lubrication system manufacturers, this new member of SKF lubrication systems Lincoln Industrial, the current SKF lubrication existing ball bearing has a high complementary value in the market area with SKF, technology development and production at the coincidence is very limited, especially in North America and Asia.
The increase SKF include Lincoln (Lincoln), Arnie Mitt (Alemite) and Rui Technology (Reelcraft) all business entities and brands. SKF Company believes that the acquisition is completed to bring more and better sales channels and better operating efficiency, the company gained a great synergy. The acquisition will be earnings per share thickening of the company, the acquisition using the company's existing cash and credit tools. In addition, Lincoln also enable industry to get into the North American SKF lubrication tools and equipment aftermarket better channels.

packing curve roller bearings

As a Chinese professional logistics drive accessories manufacturer, we offer a wide range of professional logistics conveyor rollers, pipeline transportation composite wheel, forklift chain, roller, such as packaging, printing machinery with shaft roller bearings The company specializes in production of packaging, printing machinery with shaft roller bearings. At present our production of roller bearings, have been exported to USA, UK, Europe and other countries and regions, won the praise of customers. Now our company has developed a large variety Inch roller bearings, packing curve roller bearings, bearing roller bearings, bolt-type roller bearings and needle roller bearings. Models are CF4, CF5, CF6, CF8, CF10, CF10-1, CF12, CF16, CF18, CF20, CF20-1, CF24, CF24-1, CF30, CF30-1, CF30-2. Etc.separable bearings. Under normal circumstances, especially in GB/T307.1-94 "Rolling bearing company tolerance" are involved in a range of sizes within the tapered roller bearing outer ring and inner components can be interchanged between one hundred percent use. The angle of the outer ring and the outer raceway diameter size has been standardized with the same size and shape provides. Not allowed to change in design and manufacturing. To cause the tapered roller bearing outer ring and inner components available in the world between interchangeable. Tapered roller bearings are mainly used to bear radial load mainly radial and axial joint load. And angular contact ball bearings, bearing capacity, low speed limits. Tapered roller bearings can withstand axial load in one direction, the shaft or housing to limit axial displacement in one direction.

it indicates that the bearing has failed.

 needle roller bearings operating under conditions such as high speed , and high operating temperatures , special attention should be rotating rings can not be too loose to prevent eccentric , as well as non- fixed ferrule with a gap to prevent sleeve ring deformation under load and to stimulate vibrations.

Rolling in the work allow slight noise , if the noise is too large or unusual noise or crash, it indicates that the bearing has failed.

Preload is the slewing ring bearing assembly to the inner or outer ring an axial force to remove the needle bearing clearance , and to move the body and the inner and outer contacts generated at the beginning of deformation. Preload can improve the working condition of the bearing stiffness and rotational accuracy , load bearing large , rotating high precision angular bearing , mostly in the absence of even a small amount of clearance over the work of state interference , in which case it required in the assembly, the bearing preload . Clearance and preload adjustment are usually seen by the inner ring relative axial displacement of appropriate methods to complete. From the above process is not difficult to learn concepts , through to move the bearing clearance adjustment , can improve the bearing capacity and rotation accuracy , progressive bearing life. But at the same time make the bearing frictions , fever increases, so the clearance or preload adjustment when necessary to ensure good lubrication and heat dissipation. If improperly adjusted or poor lubrication , it will in turn cause increased bearing wear , reduced life expectancy .

Rolling repair conditions and methods

Rolling is the mass production of mechanical parts, and manufacturing precision requirements are very strict, technically high degree of specialization, so for the most readily available bearing varieties, it should be more economical to purchase than repaired, and only in the following cases before considering the bearing fix the problem, namely:
(1) a large number of large factories are using the same type of angular contact ball bearing failure mainly in the form of its rolling surface wear, fatigue or fretting abrasion, especially damaged parts mostly cage or rolling, while still ring or gasket repair value;
(2) large and extra large bearing on the brink of failure or having lapsed and no significant damage parts, or precious bearings must seek to extend its useful life is;
(3) some really difficult to buy into the bearing varieties, after the failure had no spare parts and repair, especially imported bearings;
(4) bearing a slight injury, such as inventory produced during the mild water, rust, and transport process produces a slight micro abrasion, such cases repaired easily and gesture.
In addition to economy outside bearing repairs as well as its technical, requiring repairer fully understand bearing the corresponding technical requirements, with the bearing and parts in the structure, process and on the characteristics of the material, it would be difficult to ensure the bearing repairs have desirable results.

Off-cylinder engine misfire

Automotive common abnormal sound can be divided into powertrain abnormal sound, abnormal sound transmission system, driving system abnormal sound, drag abnormal noise and other categories.
1, powertrain abnormal sound
Failure occurred mainly in the engine and its related components, abnormal noise with the engine speed and change, and the frequency is higher.a. Off-cylinder engine misfire.
b. Decrease the efficiency of the engine lubrication system caused by excessive friction parts.
c. Belts, angular contact ball bearing wear abnormal sound.
2, abnormal sound transmission systemDriveline abnormal noise often comes from gearbox, differential, clutch and other components with abnormal sound gear and clutch showing a significant change in status change.3, the driving system abnormal soundDepartment of abnormal noise and driving car driving status (speed, steering) are directly related.4, the drag noise
Vehicle reaches a fixed value abnormal sound obvious, speed decreases abnormal sound disappears. Mentioned here non-normal drag caused abnormal sound. Such abnormal noise caused by the flow separation around the body pressure changes generated noise. Specifically including cavity resonance, noise catheter tube and the antenna, wiper, mirrors and other accessories vibrations caused spoiler. Seal open, plastic parts can cause rupture of the exterior curve changes caused by traveling to the high speed air spoiler form abnormal sound.

long-life low-noise high-temperature bearing grease

In the environment of high temperature and high grease used should have the following characteristics:
(1) no loss at high temperatures, i.e. at a temperature of about 180 ℃ maintain a certain consistency, is not softened.

(2) oil leak less. When the grease in the bearing catalogue to withstand repeated high shear and large centrifugal force, the lubricant can not promptly thrown back into the raceway.

(3) has a certain muted effect, a high temperature grease hardness fibers are generally large, so in the bearing noise test is far less than the acoustic performance of lithium-based grease.

(4) have a certain kind of high-temperature grease life at high temperatures with good oxidation resistance, thus extending the life of bearings and related equipment.

One bearing installation

Bearing must be installed in a dry, clean environment conditions. Should be carefully checked before installation of shaft and housing mating surface , convex shoulder face , grooves and connecting surface processing quality. All fit connection surface must be carefully cleaned and remove burrs, casting unworked surface must Ex residual sand .thin ball bearings installation should be preceded with gasoline or kerosene to clean and dry before use, and to ensure good lubrication, bearings generally use grease, oil lubrication can be . Lubricated with grease should be used free of impurities , oxidation , rust and extreme pressure properties of high-quality grease. Grease filling is bearing and tank volume of 30% -60% , not too much . With sealing structure of the double row tapered roller bearings and water pump bearing grease has been populated , the user can directly use, can no longer be cleaned.Bearing installation must be on the circumference of the ring face exert equal pressure , push the ferrule may not be a direct hit with a hammer prime tool bearing face , so as not to damage the bearings . In the case of a small amount of interference , it can be pressed at room temperature with sleeve bearing ring face , beating with a hammer sleeve , the sleeve will be pressed into the ring balanced . If large quantities of installation , can be used hydraulic press . Press-fitting , should ensure that outer end face and the housing shoulder , inner end face and the shaft shoulder pressed , does not allow a gap .When a large amount of interference , can be heated oil bath or induction heating device bearing method to install the heating temperature range is 80 ℃ -100 ℃, the maximum can not exceed 120 ℃. Meanwhile , the application of a nut or other appropriate methods tighten the bearing to prevent the bearing cooling after leaving the ring widthwise shrinkage gap between the shaft shoulder .Single row tapered roller bearings installed last clearance adjustment should be carried out . Clearance values ​​should be based on the use of different conditions and the amount of interference with the size of specifically identified. Necessary, should be tested to determine . Double row tapered roller bearings and water pump bearing has been adjusted at the factory clearance, installation without further adjustment .
Bearing rotation test should be carried out after installation , first hand rotating shaft or bearing housing , without exception, then in power for no-load , low speed , then gradually increase as the functioning of the rotation speed and load , and to detect noise , vibration and temperature , abnormal, should stop and check . Normal operation test before delivery.