slewing bearingConstruction machinery

Slewing bearings are widely used,. Construction machinery is the earliest and most widely used place for slewing bearings, such as earth-moving machinery, excavators, crushers, stacker-reclaimers, graders, road rollers, power compactors, rock drills, roadheaders, etc. Others are concrete machinery: concrete pump truck, concrete mixing and distribution rod integrated machine, belt feeder Feeding machinery: disc feeder, sand mixer; Lifting machinery: wheeled crane, crawler crane, gantry crane, tower crane, fork crane, traveling crane, gantry crane; Foundation treatment machinery: impact reverse circulation drilling rig, rotary drilling rig, impact rotary drilling rig, rotary drilling rig, reverse circulation rotary drilling rig, positive circulation rotary drilling rig, long spiral engineering drilling rig, diving engineering drilling rig, static pressure pile driver, pile driver; Engineering ship: dredger; Special vehicles: bridge inspection vehicle, fire truck, window cleaner, flat beam transport vehicle, aerial work vehicle, self-propelled aerial work platform; Light industry machinery: beverage machinery, rotary bottle blowing machine, packaging and filling machine, injection molding machine; marine crane: floating crane.

slewing bearing; Equipment platform

The method of solving the noise of the slewing bearing.

There are two common solutions for rotating bearing noise: dust noise and noise.

(1) Control method of dust noise.

There are foreign objects such as dust in the rotary branch pipe., It causes non-periodic vibrations.. The so-called dust sound, the magnitude of its vibration and noise is variable, with or.

Dust-proof method: improved cleaning method of slewing bearing/slewing bearing,. Strictly clean the bearing, shaft, seat hole and matching parts before installation; remove foreign matter in the lubricant; improve the sealing of the bearing; avoid using plastic cages containing impure materials or embedded foreign matter.

(2) the control method of scar sound.

If the rolling surface of the slewing bearing is cracked, indented or rusted,. It will produce periodic vibration and noise like riveting rivets, and its period may be fixed, but most of them have a certain correspondence with the speed. Scars will continue to appear in the channel, and the scars will appear on the steel ball. This noise will change with the installation and lubrication conditions. This noise control method: do not knock the bearing during installation to prevent the bearing from tilting when the bearing and shaft are assembled into the bearing seat; prevent bearing corrosion during storage and impact vibration during transportation; use high-viscosity grease. (3) Noise caused by lubrication factors and its countermeasures Wrong lubricant selection, insufficient lubricant or aging and hardening will cause vibration and noise of the slewing ring/slewing bearing, and this noise does not have a certain regularity. In this case, you only need to select the appropriate lubricant, adjust the amount of lubricant, extend the service life of the lubricant, and reasonably determine the replacement cycle.

(4) Noise related to the host and its countermeasures.

This noise is not caused by the bearing alone, so it is invalid to find the reason simply from the bearing. We should pay full attention to the host and improve its performance when necessary.. This article mainly introduces the common beep sound and frame resonance sound in the motor. The hum of the motor and its countermeasures The axial vibration of the motor shaft will produce a very high frequency noise-hum, the frequency of which is the same as the frequency of the axial vibration and can be constant,. It can also be variable. The method of preventing the buzzing is the same as the method of preventing the axial vibration. B bearing frame resonance sound and countermeasures when the axial natural vibration of the outer ring mass causes the axial bending natural vibration of the bearing frame, a noise called resonance sound will be produced. The method of increasing the preload can improve the axial natural frequency of the outer ring mass system, destroy the resonance condition and reduce the noise.