Installation and adjustment with high speed bearings

When the co-ordination and high speed bearings clearance due to the rapid bearing both high precision bearings according to requirements, but also according to the requirements of high temperature bearings, so consider the mating and clearance, to take into account the following points:
(1) changes in the size and hardness changes in temperature rose at a high temperature;
(2) High speed centrifugal force caused by the force system changes and shape changes.
In short, at high speed, high temperature conditions, with and clearance from the choice you want to strive to maintain the accuracy and performance of the bearing, which is difficult. In order to ensure the installation of the rear bearing raceway deformation is small, angular contact ball bearing interference fit the amount of interference can not achieve much, but heat and centrifugal force at high speed under high temperature expansion, surface or offset with normal pressure. Or the mating surface relaxation, and therefore the amount of
interference must be carefully applied in consideration of the above two factors premise In computing, at normal temperature and normal speed under effective amount of interference for high-speed bearings may be invalid.

Precision spindle bearings

Miniature ball bearing with a wide range of uses.Suitable for high speed bearing rotational friction torque, low vibration, low noise, low requirements of the product.
Products characteristics in super small aperture of micro Thin section bearings in the, diameter φ 2mm following of micro bearing has metric 68, and 69, and 60 series total 18 species, inch r series total 6 species, this based shàng, also can is divided into ZZ plate bearing dust cover series, and RS rubber bearing sealed circle series, and special rich Dragon bearing sealed circle series, and flange series, and stainless steel series, and ceramic ball series,.Micro-bearings are suitable for all kinds of industrial equipment, small rotary motors, etc;Recently, the device of micro-miniaturization, light weight, thin demand has increased.Main applications office equipment motor, soft pressure rotor drive.Dental drill, drive motor.Stepper motors, video recorders, magnetic drum.precision spindle bearings Toy models of computer fan, encoder

Flanged ball bearing practical range

Flange bearing is suitable for all kinds of industrial equipment and small rotary motor, office equipment, micro motor soft drive, pressure rotor, dental drill, the hard disk motor, stepping motor, VCR drum, toy model, a fan, a pulley, roller, transmission equipment, entertainment equipment, robots, medical equipment, office equipment,four point contact ball slewing bearing testing instruments, reducer, transmission device and a motor optics, image equipment, card reader, mechanical and electrical, precision machinery, electric tools and toys etc..

LYHY high speed bearings domestic competitive advantage

Development of bearing industry in China has made certain achievements, but there are problems that can not be ignored, the most prominent is the low-end products, high-end products still rely mainly on imports.

  A serious gap between the development of miniature ball bearings and China's machinery and equipment. It is gratifying, some have certain accumulation, and is committed to innovation of the enterprise has the breakthrough in the development of high bearing product.

  For example, specializing in R & D and production of P4, P2 level high precision bearing Luoyang LYHY high precision bearings Co., ltd..

  At present, flanged ball bearing , machine tool spindle bearings,high speed bearing the company's market competitive advantage obviously, especially machine tool bearings, product quality has to be imported products with equivalent.

Domestic flange bearing sales in 2015 will reach 222 billion yuan

Flange bearing is the key components of machinery equipment manufacturing industry, whose performance, quality and reliability of mechanical equipment depends on the bearing.

Bearing industry in China after years of development, has formed a relatively mature industry scale. At present, the bearing industry in China with an annual output value of 130 billion yuan, ranking third in the world（ high speed bearing ，metallurgical bearing）.

It is expected that by 2015, China's bearing industry sales will reach 222 billion yuan, with an average annual growth rate maintained about 15%.

Solution of miniature ball bearings overheating temperature

Because of the different heating reason of miniature ball bearings, the solving way is different, here is a method of solution for the miniature bearing overheating temperature.

• Filling grease method, the so-called filling grease method is regularly to the working surface of the bearing to fill in the amount of grease,which is one of the most commonly used grease lubrication way.

• The oil cup method, the oil cup is arranged in the bearing seat by screw cap type oil cup or pressure oil cup, periodically rotating the cover or using a gun will grease injection. It is also a common way of lubricating grease

• The pressure for fat method, thin section angular contact bearings pressure grease method is to rely on the lubricating grease pump grease. You should use grease with good fluidity.

• Centralized grease, centralized grease through the grease pump method, at the same time for the fat to each deep groove ball bearings and other components.

  Meanwhile,thin section bearing at this time the grease should use of lubricating grease flowing sacrifice, good oxidation resistance and corrosion resistance,which is also a kind of pressure for fat method.

The big three models of flange bearings

Since flange bearing are designed to increase  accuracy of position, there are thousands and hundreds models availability.Each designed for applicability of particular ball bearing functions and requirements.
When selecting a high speed bearing, the dimensions should suit the diameter of the shaft, and they are thus available in a myriad of sizes. The largest differentiating factor between flange bearings is the number of bolts (mounting holes) on the mechanism.
Double-bolt flanges
These flanges are available either in a wing-shape or in a diamond shape, which have two mounting holes, (usually elongated for simple, user-friendly adjustment). They are engineered to be repositioned and aligned for the best fit of shaft
Three-bolt flanges,these flanges are round, which have three equidistant mounting holes.
They are engineered to be repositioned and aligned for the best fit of shaft.

Four-bolt flangesThese flanges are square shaped, which have four equidistant mounting holes. For the larger number of positioning bolt-holes, they are more stable than their double-bolt counterparts,thus have a greater load-capacity. They are engineered to be repositioned and aligned for best fit of shaft.

  Flange linear ball bearing often made from cast iron or thermoplastic material. But some manufacturers produce flange bearings of  plastic. The polymer bearings offer a more cost-effective option to metal flanges. They are backed by a thin construction to compensate for the lost width,maintaining the stability and temperature resistance offered by their metal counterparts.

Application of miniature bearing

Miniature ball bearings are suitable for all kinds of industrial equipment,  small rotary motor high speed bearing low noise field, such as,

  Office equipment, micro motor, instrument, laser engraving, small clock, soft drive, pressure rotor, dental drill, the hard disk motor, stepping motor, VCR drum, toys, computer cooling fan, currency-counting machine, fax machine and so on related field.

Flanged ball bearing show

Many miniature ball bearings have flanges as options to their configurations. The flange is designed for mounting and positioning,which is especially true for miniature and instrument bearings and applies to other ball bearing types.

  To get various types of flanged ball bearings click the next lists,

  slewing-bearings,flanged-bearing

The adjustment of high speed bearing

If the calculation results of contradiction is too large (usually have this situation only at the highest speed), only take double lubricating measures under ring lubrication method and static pressure lubrication method,which is likely to make the DMN value exceeded 3 million of the bearing.

  Considering the high speed bearing clearance  not only include the factors mentioned above, but also  the effect of thermal elongation axis on the clearance of the bearing. The requirements in the working state, which has the best clearance at operating temperature.

  This clearance formed under the condition of the inner ring and the outer ring of the  ball groove center aligned accurately. As thehigh precision bearings to reduce the relative sliding and internal friction, clearance of SKF 71900C/DB angular contact ball bearing had better not use relative displacement methods within the inner ring and the outer ring along the axial direction to adjust the ball bearing.

The coordination of high-speed bearing

high-speed bearings with clearance due to the requirements of the high speed for both high precision bearings  and  high temperature bearing, so in consideration of its coordination and clearance, to take into account the following two points:

(1) changes in the size and hardness changes when the temperature rose from     ambient temperature;
(2) force line change and shape change under high-speed centrifugal force caused by.

In short, in the high precision ball bearings and high temperature conditions, and with clearance from the selection of want to keep a bearing on the accuracy and performance, this is difficult.

In order to ensure the bearing after installation of the rolling deformation is small, the amount of interference can not KOYO 7319AC angular contact ball bearing interference fit get too large, and high speed centrifugal force and high temperature thermal expansion, or set off with the normal surface pressure.

Or relax the mating surface , so the amount of interference must considering the above two kind of factors under the carefully calculated, the effective amount of interference may be invalid for the high-speed bearing in the normal speed.

high speed bearing

High speed, medium speed and low speed bearing, not on speed set but in line speed set. Smallbearings motionless tens of thousands turn not high-speed bearing, large bearing hundreds ofturning even high-speed bearing.

  High speed bearings generally refers to the bearing speed reached 60 meters per second. In the sliding bearing, hydrostatic bearings, hydrodynamic bearings, aerostatic bearings, hydrodynamic gas bearings are suitable for high speed rotation.

  But the general rolling bearing adapted to low speed rotation, if the use of rolling bearings of high speed rotating need special requirements. The above bearings are in Chinese standard, it is easy to search to the bearing, reasonably choose the model according to the use of the load and other factors.

  If the speed between 5 to 60 meters per second, if not on the high-speed bearing, as long as the general bearing lubrication basic can satisfy. If the bearing use higher speed in some special occasions, such as high speed rotary bearing used in high speed cutting machine or precision machining machine tool can also be used for bearings, magnetic bearings, ceramic bearingselectric power special, but contact with the professional manufacturers.

Installation and adjustment of the high-speed bearings

   When fit and clearance high speed bearing both due to the high-speed precision bearings according to the requirements, but also by high-temperature bearing requirements, so considering its fit and clearance, to take into account the following points:
  (1) a dimensional change and hardness change from normal temperature was raised at a high temperature;
  (2) due to the centrifugal force at high speed, and change in shape.
In short, high-speed, high-temperature conditions, and clearance from the mating choice should strive to maintain the accuracy and performance of the bearing, which is difficult.
 In order to ensure the bearing raceway deformation after installation, angular contact ball bearings over the amount of interference can not get too much interference fit, while the heat under the centrifugal force and high temperature under high-speed expansion, or offset the mating surfaces of the normal pressure. Or the mating surface relaxation, and therefore the amount of interference must be calculated carefully consider the above two factors in the premise, at room temperature constant speed under effective amount of interference for high-speed bearings may be invalid.
   If the result of this contradiction is too large (usually only in the ultra-high speed only in this case), only to take measures to double the lubrication ring lubrication method and hydrostatic lubrication and use, and this program has the potential to break through the miniature ball bearings dmn value 3 million mark. Thermal expansion at high temperatures, or the mating surfaces to offset the normal pressure. Or the mating surface relaxation, and therefore the amount of interference must be calculated carefully consider the above two factors in the premise, at room temperature constant speed under effective amount of interference for high-speed bearings may be invalid.
   If the result of this contradiction is too large (usually only in the ultra-high speed only in this case), only to take measures to double the lubrication ring lubrication method and hydrostatic lubrication and use, and this program has the potential to break through the bearing dmn value 3 million mark. When considering the high speed bearing clearance only to consider the above factors, but also to consider the impact of thermal elongation axis clearance required bearing in working condition, that have the best clearance at operating temperature, and this species clearance is included,the exact center of the outer ring ball groove to the next state formation. Since the high-speed bearings reduce strive relative sliding and internal friction, angular contact ball bearings best not to use the inner and outer rings relative axial displacement method to adjust ball bearing clearance.
   In considering the amount of interference with the flanged ball bearing and the clearance, to be noted that the material becomes soft and easily deformable features, and many times from room temperature to high temperature changes caused by the possibility of a certain permanent

deformation at high temperatures.

high speed bearing requirements

The high speed bearing   life and reliability, although the design and bearing manufacturing, lubrication, installation, maintenance and other factors, but the bearing material of high quality and reliability is the key. Rolling bearing components in tensile, compression, bending, shear, alternating with complicated stress state and high stress, high speed and long time work. Therefore, with the rolling bearing:
1) high resistance to plastic deformation capacity,
2) anti friction, wear and high performance,
3) the rotating precision and high dimensional accuracy,
4) good dimension stability,
5) a long service life and high reliability.
For Liner Motion Bearings working under special conditions, there are special requirements, such as high temperature performance, low temperature resistant performance, corrosion resistance and water resistance etc..

Tapered roller bearings and high speed bearing installation

Bearings must be installed in a dry, clean environment conditions. Before installation should check carefully with the axis and the shell surface, convex shoulder end, grooves and connecting surface processing quality. All mating surfaces connected, must be carefully cleaned and remove the burrs, not casting surface must except sand net residual.

Bearing installation should be preceded with petrol or kerosene to clean, dry after use, and ensure good lubrication, bearing the general use of grease, oil lubrication can be applied. With grease lubrication, should be used without impurities, oxidation, rust, extreme pressure properties of high quality lubricating grease. Amount of grease filled bearings and mobile crane bearing  box volume of 30%-60%, not too much. With grease has been filled with good sealing structure of double row tapered roller bearings and water pump bearings, users can directly use, no further cleaning.

Bearing installation, must be applied equally in the circumference of ferrule end face pressure, will press into the ring, not directly strike the bearing end face want first tool, so as not to damage the bearing. Small amount of interference in the case, can suppress at room temperature with the sleeve bearing ring face, beating with a hammer sleeve, through the sleeve will be pressed into the ring balance. If the high-volume installation,high speed bearing use of hydraulic machine. Indentation, should ensure the outer end face and shoulder shell surface, the inner end face and shoulder axis end pressing, does not allow a gap.

When the amount of interference is large, can be installed using oil bath heating or inductor heating method of bearing, the heating temperature range of 80 ℃ -100 ℃, the maximum should not exceed 120 ℃. At the same time, the application of nuts or other fastening bearing appropriate methods to prevent the bearing cooling, the width direction of contraction and between the ring and a shaft shoulder generation gap.

Single row tapered roller bearing installation of the final clearance should be adjusted. Clearance value should be used according to different conditions and with the amount of interference to determine the size and specific. When necessary, should be tested to determine. Double row tapered roller bearings and water pump bearing factory has adjusted well clearance, no further adjustment during installation.

Bearings should be installed after the rotation test, first hand rotation shaft or bearing box, without exception, they have no power to load, low speed operation, and then gradually increase as the functioning of the rotation speed and load, and to detect noise, vibration and temperature, abnormal, should stop and check. Test normal operation before delivery.‍