Single row cylindrical roller bearings and double row cylindrical roller bearings distinction

Single row cylindrical roller bearings are separable bearings, easy installation and removal, two rings may be a tight fit, the contact line of the rollers and raceways between the modified can be reduced stress concentration. Double row cylindrical roller bearings are non-locating bearing, separable makes its easy installation and removal. Two rings can be a tight fit. Double row cylindrical roller bearings almost not allowed to have an inclination angle. When installing the rolling ball bearings and cylindrical roller bearings, all parts are installed concentric must be strict, so as not to skew the inner sleeve of the jacket. The only way to ensure concentricity to note that boring process, installing or removing the force can not be transmitted directly through the rollers and the cylindrical ring wall.

Slewing ring bearing noise solution

Slewing bearing noise common with dust and scratches acoustic sound two solutions side as follows:
(1) dust control method sound, there is support within the rotary dust and other foreign matter, non-periodic vibrations occur, the so-called dust acoustic, the size of the vibration and noise uncertainty, and with or without. Dust acoustic control method: the cleaning methods to improve slewing ring / wheel bearing, front bearing installation, shaft, housing bore and mating parts all in strict cleaning clean; remove foreign matter within the lubricant; to improve the bearing seal; avoid the use of impure material or embedded foreign objects plastic cage.
(2) control method scars sound, slewing ring rolling surface if crack, indentation, or rust occurs like a rivet as a periodic vibration and noise, the cycle may be fixed but mostly related to a certain speed correspondence, scars continuously occur on the channel, the scars on the ball on time is now hidden, and this noise with the installation and lubrication conditions and there are some changes. Such noise control method: When installing non-percussion bearing, the bearing and shaft assembly before loading ramp bearing to prevent bearings mounted when; when the inventory to prevent shock and vibration to prevent bearing corrosion and transport; the use of high viscosity grease .

Slewing ring bearings

Slewing ring, is a comprehensive large bearings to withstand load, can withstand large axial, radial load and overturning moment. Slewing ring bearings are generally installed with a hole, the internal gear or the external gear, lubricants holes and sealing devices, which enable the host compact design, the guide is simple, easy to maintain. Slewing ring bearings with or without gear, external tooth and internal tooth four-point contact ball bearings, double row angular contact ball bearings Crossed cylindrical roller bearings, tapered roller bearings and cross three-row cylindrical roller bearings four composite.