LYHY precision spindle bearings wheel bearing

2, If you hear noise emitted wheel bearing parts, first of all, it is important to find the location of the noise occurs. There are many moving parts may produce noise, but also may be some rotation member and the rotating member occurs without contact. If the confirmation is bearing noise, bearing may be damaged and need replacing.

3, because the front wheel bearing failure on thin wall bearings‍ both sides led to similar working conditions, so even if only one bearing bad, it is recommended to replace in pairs.

4, wheel bearing more sensitive, in any case need to adopt the right approach and the right tools. In storage and during installation, the bearing parts can not be damaged. Requires a large number of bearings pressed into the pressure, so the need of special tools. Be sure to reference vehicle manufacturers instructions.

5, the installation of the bearing should clean environment, small particles from entering the bearing will shorten bearing life. When replacing bearings to maintain a clean slewing ring bearings‍ environment is very important. Allowed to tap with a hammer bearing note bearing not fall to the ground (or similar improper handling). Before installing the shaft and the bearing housing should also check the condition of even a small amount of wear can also lead to poor fit, thereby causing early failure of the bearing.

6, on the wheel hub bearing unit, do not attempt to disassemble or adjust the wheel hub bearing seals unit, otherwise it would cause water damage to seals or dust from entering. Even ring and inner ring raceway are damaged, resulting in permanent failure of the bearing.

7, the ring is equipped with ABS unit has a magnetic thrust bearing ring, which thrust ring can not be a collision, impact or collision with other magnetic field. Remove from the box before installation, so that they stay away from magnetic fields, such as the use of electric motors or electric tools. When installing Angular contact ball bearings‍ these bearings, the road test by observing the dashboard ABS alarm pin to change the bearing operation.

8, equipped with ABS wheel hub bearing magnetic thrust ring, thrust ring mounted in order to determine which side, you can use a small light near the edge of something * bearings, magnetic bearings will be attracted by it generated. When installing a magnetic thrust will take the side of the ring pointing inside, is on the ABS sensor. Note: Incorrect installation may lead to functional brake system failure.

9, many of the bearings are sealed, this type of bearing is not needed throughout the life of the grease increases. Other non-sealed bearings such as double row tapered roller bearings in the installation must be added grease. Because different lumen size of the bearing, it is difficult to determine how much of the added fat, the most important thing is to ensure that the grease bearing if too much fat, when the bearing is rotating, the thin section bearing‍ excess oil will bleed. General Experience: During installation, the total amount of oil to account for 50% of the bearing clearance.

10, install the lock nut due to the different types of bearings and bearing housings, the size difference between the torque is great. Note reference to the relevant instructions.‍

marine crane bearing Precautions

Wheel Bearing worn or damaged wheel bearing or hub units will happen to your vehicle and the cost of higher anachronistic failure in traveling the road, or even damage to your slewing ring bearings‍ safety. Wheel bearings in use and installation Please note the following:

1, in order to ensure maximum safety and reliability, it is recommended that you no matter how long the age of the vehicle should always check the wheel bearings - note bearing for wear early warning signals: including any friction noise when rotating or turning wheel suspension combination when the deceleration is not normal.

Rear-wheel drive vehicle is recommended for the thin wall bearings‍ vehicle to 38,000 km is to deal with the front wheel hub bearing lubrication. When replacing the brake system, check the bearing and replace the seal.

marine crane bearing Wheel bearings

Wheel bearings are used in automotive axles for load-bearing and rotating at the hub of providing precise guidance components, both axial load and radial load, is an important part of the car load and rotation.

Traditional automotive wheel bearing is thin wall bearings‍ composed of two tapered roller bearings or ball bearing combination, bearing installation, oiled, sealed and adjust the clearance is carried out in the car on the production line. This structure makes it difficult in a car assembly plant, high cost, poor reliability, and maintenance car maintenance, but also the need for bearing cleaning, oiling and adjustment.

Wheel Hub Bearing

In standard angular contact ball bearings and tapered roller bearings developed on the basis, it sets bearing as a whole, with good assembly performance can be omitted clearance adjustment, light weight, compact structure, large load capacity, for can advance into the grease sealed bearings, seals and hub maintenance omitted from the outside wheel, etc., have been widely used in cars, and in the truck also has a tendency to gradually Angular contact ball bearings‍ expand the application.

History

Car wheel bearings are used in pairs over a maximum single row tapered roller or ball bearings. With the development of technology, the car has been widely used car wheel unit. The growing scope and use of hub bearing unit has now developed to the third generation:

The first generation is a double row angular contact bearing components.

The second generation of the outer raceway for bearing a fixed flange bearing sleeve may simply be fixed with a nut on the axle. Makes the car maintenance becomes easy.

The third generation wheel hub bearing units are using lewing ring bearings‍ a bearing unit and ABS anti-lock brake system compatible. Wheel hub unit designed to have the inner flange and an outer flange, the flange is bolted to the drive shaft, the outer flange of the bearing mounted together.

agricultural bearings Angular contact ball bearings

Angular contact ball bearings: 7000C-type (α = 15 °), 7000AC type (α = 25 °) and 7000B (α = 40 °) of several types. This kind of bearing lock port on the outer ring, the inner thin wall bearings‍ and outer rings can not be separated in general, can withstand radial and axial joint load and axial load in one direction. Axial load capacity from the contact angle, the contact angle is larger, the ability to withstand high axial loads. This kind of bearing can limit the axial displacement in one direction shaft or housing.

Higher speed limit contact ball bearings can support radial load and axial load can also be subject to pure axial load, axial load capacity by the contact angle and the contact angle increases with the increase.

Single row angular contact ball bearings

Single row angular contact ball bearings can withstand axial load in one direction, when the radial load, will cause additional axial force must be applied to the corresponding reverse thin wall bearings‍ load, therefore, the kinds of bearings are generally used in pairs. Double row angular contact ball bearings can withstand greater radial load mainly radial and axial joint load and moment loads, it can limit the bi-axial displacement of shaft or housing.

LYHY precision spindle bearings magnetic bearings (see figure)

Using electric force, magnetic force of the shaft suspension sliding bearings. Electric field force is electrostatic bearing suspension with magnetic force suspension of magnetic bearings (see figure), electric field strength and the magnetic field strength is combined together suspension bearings. A bearing both electrodes have the poles in the circuit connecting the capacitor and inductor corresponding to each other tuner, the stiffness thin wall bearings‍ is much higher than the first two, and the corresponding displacement of the maximum force is very small. Electromagnetic bearings for shaft and bearing no direct contact, no lubrication, can be in a vacuum and over a wide temperature range, friction is small, not the speed limit (some speed up to 23 million rev / min line speed of up to three times the speed of sound), long life, the structure can be diversified. Static bearing requires a lot of field strength, the application is limited, use only a few meter. Magnetic bearings with a larger carrying capacity and stiffness, have been used in ultra high-speed trains, ultra high-speed centrifuges, hydro, spacecraft angular momentum flywheels, flow meters, density meter, power meter, vacuum pumps, precision current regulator and gyroscopes. With the development of magnetic and electronic technology, electromagnetic bearing ship loader bearing‍ applications are growing.

‍Electric force and electric field strength, electric displacement and the electrode area is proportional to the magnetic field strength and the magnetic field strength is proportional to the magnetic flux density and magnetic area. Select the appropriate electric or magnetic field parameters and geometry, get some bearing load capacity and stiffness. Electrostatic attraction between the magnetic attraction is inversely proportional to the square or the distance of the object, according to Hugh Aner theorem, this system is statically indeterminate statics, so in addition to the use of anti-bearing outer magnets or superconductors, in the electrostatic field or static magnetic field work bearing is thin wall bearings‍ unstable. For the magnetic bearing is stable, servo device or method must be used to adjust the circuit parameters control. The actual use of the general magnetic bearing by radial bearings, thrust bearings, servo-control loop, dampers, speed sensor or position sensor and other components.

marine crane bearing Magnetic bearing system

Magnetic bearing system is composed of the following five components: controller, rotor, solenoids, sensors and power amplifiers. One of the most critical component is the controller. slim ball bearing‍ Controller performance largely determine the performance of the magnetic bearing system. Control law controller determines the dynamic performance and stiffness of the magnetic bearing system, damping and stability.

The controller is divided into two kinds: Analog controllers and digital controllers. Compared with the digital controller analog controller has the following disadvantages :( a) adjustment inconvenient; (b) it is difficult to implement complex control; (c) can not simultaneously achieve two or more degrees of freedom control; (d) mutual change is poor, that is, different magnetic bearing controller must have a corresponding; large (five) power consumption, large volume and so on.

Magnetic bearing to be widely used, the difference between analog controller to adjust the performance of online say that it is one of the reasons, therefore, the direction is the slewing ring bearings‍ development trend of digital magnetic bearing. At the same time, to achieve intelligent magnetic bearing systems, analog controller is obviously difficult to meet this requirement. Therefore, to improve the magnetic bearing from the performance, reliability, and enhance the flexibility and reduce the volume controller, power, and in the future to network, intelligent direction angles, the controller must implement digitization. The last three decades has been the rapid development of control theory and made widely used.

Magnetic bearings, is a new high-performance bearings. Compared with conventional ball bearings, plain bearings and oil film bearings, magnetic bearings there is no mechanical contact, the rotor can reach very high operating speed, with a small mechanical wear, low energy consumption, low noise, long life, Thin section bearings‍ no lubrication, no oil pollution etc., especially for high-speed, vacuum, clean and other special environment. It can be widely used in machining, turbo machinery, aerospace, vacuum technology, rotor dynamics identification and other tests in the field, is recognized as a very promising new bearings.

agricultural bearings angular contact ball bearing life

High-speed precision angular contact ball bearing life of a great relationship with the installation, you should note the following

1 bearing should be installed in the clean, clean room, to carefully matching the bearing, the bearing spacer to be after grinding, while maintaining the inner and outer contour of the spacer premise spacer should be controlled in parallel 1um the following;

2 bearings should be cleaned before installing clean, slewing ring bearings‍ cleaning the inner slope upward, feel should be flexible, no sense of stagnation, dry, placed in a specified amount of grease, oil mist lubrication should be placed in the case of a small amount of oil mist;

3 bearing installation tool should be used exclusively, even by force, is prohibited beat;

4 bearing store should be clean air, non-corrosive gases, relative humidity less than 65%, long-term storage should be regularly rust.

Maintenance 1, when the bearing to run to a certain period of time (or Paul raised maintenance period), will be bearing all removed;

2, with a clean diesel or kerosene soaked with cleaning bearings, if technical conditions for the best open closures cleaning;

3, air dry after cleaning cleaning oil, visual inspection thin wall bearings‍ for damage;

4, with about a 150mm, angular contact ball bearing diameter equal to the inner diameter of the stick (preferably hollow tube), one end fixed to a bearing;

5, rapid rotation of the bearing by hand while the stick (wooden pipe) and the other end on top of the microphone audio amplifier or listening to the debate on the ear bearing rotation noise;

6, horizontal toggle the fixed bearing sticks, check bearing wear loose;

7, loose serious, turn the noise is too large, there is a serious defect FAG bearings should be eliminated, replaced with the same model;

8, take a bucket of the appropriate amount of grease (high quality yellow dry oil) with gentle heat to melt (not hot), will detect over-bearing into the bucket to soak no bubbles overflow. Bearing grease to cool before removing residual grease less. After cooling remove grease angular contact ball bearings, slim ball bearing‍ grease residue quantity. Determine how many of the remaining amount of grease required.

9, with a soft cloth or tissue paper to wipe the outside of the bearing grease will FAG bearings fitted to the pulley undisturbed security, maintenance work is completed.‍

LYHY precision spindle bearings Comparison

1. Rolling coefficient of friction than plain bearings, high transmission efficiency. The friction coefficient is generally 0.08-0.12 sliding bearings, rolling bearing and the friction coefficient is only 0.001 to 0.005;

2. Rolling has achieved standardization, slewing ring bearings‍ serialization, universal, suitable for mass production and supply, use and maintenance is very convenient;

3. Rolling bearing steel, and after heat treatment, and therefore, only the rolling bearing having a high mechanical performance and long service life, and can be used to save manufacturing sliding bearings

The price is more expensive non-ferrous metals;

4. Internal bearing clearance is small, high precision of the parts, and therefore higher running accuracy. At the same time, can increase the rigidity of the bearing pre-load by the method. This precision machinery is very important;

5. Some of rolling bearings can support radial load and axial load, so you can simplify the bearing support structure;

6. Due to the high rolling bearing transmission slewing ring bearings‍ efficiency, less heat, so you can reduce oil consumption, lubrication maintenance relatively easy;

7. Rolling can be easily applied to any spatial orientation of uranium.‍

marine crane bearing Needle roller bearings sound characterize CAUSE

Ye - ye loud rattle sound quality does not vary with changes in rotation speed changes (dust / foreign body) rotation speed of sound changes with the change (scratch) dust / foreign body orbital plane, ball, roller surface rough track surfaces, ball, roller surface scratches

Bared small bearings track surface, ball, roller wind power bearing‍ surface roughness

Bared - bared it off, and there is regular contact occurs with the ring section in contact with the holder and closures

Didi roar loud whining sound velocity changes due to rotation, size, height are changed. With specific speed rotation and the sound becomes larger. There is also an alarm or beep when approximate. Resonance, with the bad (bad shape axis) orbit orbital plane surface deformation, ball, roller bellows (large bearings as a mild tone, then normal)

Crunching feeling when the track surface scratches manually rotate the (rules) ball, roller scratches (irregular) dust / foreign body, the track surface deformation (part of the gap is negative)

When large bearing high-speed continuous rumbling sound track surface small bearings, ball, roller surface scratches

Woo - Om - electromagnetic sound instantly Thin section bearings‍ stops the motor when power off

Squeak squeak la la irregular occurrence (non-rotating speed variation and change), mainly for small bearings mixed with dust / foreign body

Jingle jingle tapered roller bearings and high-speed continuous tone rule large bearing small bearing retainer as compared with normal voice was clear and maintain good internal abrasion due to insufficient lubrication grease oil at low temperatures, such as discomfort → soft, insufficient load bearing operation.

Hey friends when the low-speed crash was more pronounced at high speed continuous tone maintain sound internal shocks, lack of lubrication. After reducing the internal clearance or preload different sound disappears. If so, then all of the roller, the roller occurs between the sub-impact sound.

Bang Bang loud impact sound low speed large metal thin large bearing (TTB) and so on. Torn rotator wheel deformation squeaky sound track

Bang bang sound cylindrical roller bearings are slewing ring bearings‍ mainly due to the rotation speed of change, you can hear the sound of large metal sound. After supplement lubricants, and sometimes stops. Lubricants too thick radial internal clearance is too large enough lubricant.

Sound bite sound  of metal between the roller bearing roller and rib bites inside the gap is too little lubricant shortage

Bared it sounds irregular bearing lubricant occurred in the small bubble burst tone

Jenna Jenna snapped snapped squeaky irregular mounting surface with slip ring key part of the squeak squeak sound, etc.

Sound pressure is too large orbital plane, roller ball surface roughness due to the friction surface of the track, rollers, ball deformation due to internal friction and the gap is too big.‍

agricultural bearings Angular contact ball bearing

Angular contact ball bearing is a bearing, it can support radial and axial loads. Able to work at higher speeds. The contact angle, the higher the axial load carrying capacity. High-precision and high-speed bearings usually take the contact angle of 15 degrees. In the axial force, the contact angle will increase. crossed roller bearings‍ Angular contact ball bearings can support radial and axial loads. Able to work at higher speeds. The contact angle, the higher the axial load carrying capacity. High-precision and high-speed bearings usually take the contact angle of 15 degrees.

In the axial force, the contact angle will increase. Single row angular contact ball bearings can withstand axial load in one direction, while the radial load, will cause additional axial force. And the only limit axial displacement in one direction shaft or housing. If paired installation, so that one pair of bearing outer ring relative to that wide side face of wide and narrow side facing the narrow end. This can avoid additional axial force, and the shaft or thin section bearing‍ housing to limit axial clearance within the range in both directions.

Angular contact ball bearing raceway for its inner and outer rings relative displacement on the horizontal axis, so it can support radial load and axial load - combined load (single row angular contact ball bearings can withstand axial load in one direction, So often adopted installed in pairs).

Cage made ​​of brass, synthetic resins, etc., depending on the bearing forms, and application conditions.

Angular contact ball bearings: 7000C-type (α = 15 °), 7000AC type (α = 25 °) and 7000B (α = 40 °) of several types. This kind of bearing outer ring of locking in the general inner and outer rings can not be separated, can withstand radial and axial joint load and axial load in one direction. Axial load capacity from Slewing drives‍ the contact angle, the contact angle is large, the ability to withstand high axial loads. This kind of bearing can limit the axial displacement in one direction shaft or housing.