1 raceway soundThe sound is because of rolleroilless bearing bushingswivel raceway when rolling in the rolling and stimulate a smooth and continuous noise, or tone only if its sound stress level when aroused excellent interest. In fact, inspired by the sound of roller acoustic energy is limited, as with normal situations, high-quality sound for the 6203 roller bearing 25 ~ 27dB. This noise would be to load single row deep groove radial ball bearings for one of the most standard, her following characteristics:a. noise, vibration is random;b. vibration frequency at 1kHz or much more;c. Regardless of whether the adjustments in speed, noise, sound stress level of the principle frequency is practically continuous and increases with all the speed enhance;d. Once the radial clearance increases, the sound pressure level enhanced drastically;e. bearing rigidity increases, the entire sound pressure level is lower, even though the rate increases, the total sound pressure level has additionally enhanced little;f. lubricant viscosity, the higher the sound pressure level is reduce, however for grease lubrication, the viscosity, the form of soap fiber noise can influence the size of the value.Raceway sound source is generated by the ring following load due to the inherent vibration. As the rings and rolling components is really a non-linear elastic get in touch with vibration technique. Once the lubricant or processing accuracy is just not high and this will stimulate the inherent flexibility qualities in the vibration, the air is passed to become noise. As all of us know, even employing the highest levels of modern manufacturing technology method bearing components, the perform surface there'll constantly be varying examples of small geometric errors, so that the raceway and rolling components in between the excited vibration systems generate little fluctuations inside the organic vibration. Despite the fact that it truly is inevitable, nevertheless, high-precision machining components can be taken to the perform surface, make use of the correct choice of bearings and precision bearings make noise damping.
(2) rolling sound of falling bodyThe noise under standard situations, mostly within the low-speed and massive radial load bearing. Once the bearings operating under radial load, load bearing and non load zone location, in the event the bearing has a radial clearance, non-load zone of rolling components and raceway does not touch the interior, but the centrifugal force might be connected with external Circle contacts, that at low speeds, when centrifugal force is much less than the rolling body weight, scroll down and encounter with the inner raceway or cage bearing effect and stimulate the inherent vibration and noise, and it has the following traits: a. grease lubrication simple to make, oil lubrication is just not easy to create. When will simply produce low-grade grease.b. frequently take place in the winter months.c. For that function of just radial loads and bigger radial clearance also simple to make.d. Within a specific range of drawn cup needle roller bearingswill produce and bearing its speed ranges.e. continuous sound might also be intermittent sound.f. often forced vibration excitation from the outer ring of the second, third bending organic vibration, and as a result the issue in the noise. By means of the use of pre-loading approach can effectively reduce the noise, reducing the work installed right after the bearing radial clearance, use a superb lubricant can also be improved, and a few foreign organizations with light rolling, for example ceramic roller or hollow roller and other technical measures to prevent this noise generation.3 sharp songIt truly is the sliding friction amongst metal screams very severe, although this time the bearing temperature just isn't higher, the bearing and grease life with no life significantly effect does not influence the rotation, although not sweet sound disturbing, particularly a big radial load short cylindrical roller bearings often this noise, which is characterized by:a. bearing radial clearance is easy to produce big.b. generally happens within the grease lubrication, oil lubrication is comparatively rare.c. With all the bearing size decreases, and often occur within a particular speed variety.d. often take place in winter.e. Its appearance is irregular, and unpredictable, as well as the volume and greased using the performance, installation operating circumstances.This noise could be reduced bearing radial clearance as well as the utilization of shallow structure to prevent the outer ring raceway.four cage soundRotation in the bearing cage in the course of the totally free vibration and rolling or it'll send this ring relative to the noise influence. It could happen in a variety of types of bearings, but its sound stress level isn't also higher and low frequency. Its qualities are:a. stamping and plastic cage cage could be generated.b. regardless of whether it is oil or grease lubrication thin will seem.c. Once the outer ring to withstand one of the most vulnerable to bending moment.d. large radial clearance prone.Because the cage and the cage pocket clearance holes and gaps inside the bearing ring is inevitable to exist within the finished item, total elimination on the cage so the sound is extremely tough, but by minimizing assembly errors, optimization of a reasonable amount of space and traverse the cage to improve the .Yet another special sound is because of the cage and also other cage guide surface on the bearing components attributable to friction among the cage self-excited vibration and noisy place. Deep groove ball bearing drawer slide chinabearing cage punching thin in the radial and axial bending stiffness in the reduce plane, the general stability of the poor, bearing high-speed rotation on account of bending deformation will produce self-excited vibration attributable to "beep" .When the radial load bearing and grease the case of poor functionality, the first operation will hear the "click, click," noise, mainly on account of rolling soon after leaving the loading region, with rolling element cage abruptly accelerated phase hit and also the noise, but with such a crash is inevitable run will disappear after some time.Cage to stop noise measures are listed below:
a. As a way to stabilize the cage revolution movement, signifies need to be adopted to steer ring and advice the side to offer complete interest to lubrication, high-speed operating situations of the tapered roller bearing structure gives enhanced guidance from the roller cage modify L-type guide for that Z-ring ribs cage.
b. bearing high-speed rotation, a big clearance hole pocket bearing vibration amplitude is significantly bigger than its cage pocket clearance hole tiny cage vibration amplitude, therefore the value of pocket-hole gap is particularly critical.
c. To pay attention to decrease the radial clearance.d. preserve the value of manufacturing precision as you possibly can, to enhance the top top quality in the cage, will aid reduce the rolling element and cage collision or friction noise.
e. optimistic use of sophisticated cleaning technologies, harmony teams of spare parts following thorough cleaning merchandise successfully improve the cleanliness on the bearing.5 rolling bearing by way of the vibrationOnce the bearing radial load operation, only the amount of its internal rolling element bearing load, because of the elastic get in touch with with all the ring form from the "spring" towards the rolling bearing radial load in the line produced with a periodic vibration, and So at the next vertical shaft center move or move horizontally, and result in noise.
Such vibration is named rolling by way of vibration, especially in the low speed overall performance on the a lot more obvious.And its amplitude is and the kind of bearing, radial load, radial clearance along with the number of rolling elements. The amplitude is generally smaller sized, in the event the formation of large amplitude once the harm is typically utilized for this reduced radial clearance or pre-load applied to the reduced right.