Slewing bearing

About: Slewing bearing is a research topic. Over the lifetime, 1498 publications have been published within this topic receiving 5309 citations.

Shaper capable of automatically measuring slewing bearing deviation from circular form

Abstract: The invention discloses a shaper capable of automatically measuring slewing bearing deviation from circular form. The shaper comprises an electrical vortex sensor, a clamping hydraulic system, a shaping hydraulic system, a rotating table system and a PLC control system; after the self-centering work of the clamping hydraulic system is completed, the electrical vortex sensor 15 mounted on a frame 22 moves to a detection position along a linear guide rail 20 mounted on a support 16; a rotating table 2 is driven by a servo motor 23 to rotate by 360 degrees so that the position, having the maximum value of the deviation from circular form, of the slewing bearing 1 to be shaped can be detected by the electrical vortex sensor 15. The shaper capable of automatically measuring slewing bearing deviation from circular form is capable of automatically detecting the circularity and automatically rounding; in other words, the electrical vortex sensor is used for accurately measuring the slewing bearing deviation from circular form, a hydraulic cylinder is applied to pressurizing instead of manual work, and the shaping work of the slewing bearing is completed under the control of the PLC control system. The method is capable of remarkably improving the detection accuracy and the production efficiency, realizing automation, and liberating labor from complex shaping work.

Bearing and slewing bearing for construction machine

Abstract: PROBLEM TO BE SOLVED: To provide a slewing bearing capable of increasing the number of rolling bodies more than a prior art, which are capable of housing in a rolling body housing space, even though a spacer made of plastic grease is used therein SOLUTION: The slewing bearing used for a construction machine comprises an inner ring and outer ring arranged so as to surround the inner ring, and has multiple rolling bodies 3 and multiple spacer 11 having recesses in a central portion of both sides alternately arranged and housed in the circular rolling body housing space formed between both rings The bearing gyrates a slewing body arranged between a base and the slewing body gyrating over the base while supporting the gyrating body The spacer 11 is made of plastic grease 20, and a load receiving member 21 made of a material such as a synthetic resin or the like which is less prone to be crushed than the plastic grease 20 is arranged on a central portion of the space 11 The load receiving member 21 is designed to receive the load at a stage before in which the plastic grease 20 is deformed beyond its elastic limit by the load from the rolling body 3 COPYRIGHT: (C)2003,JPO

Wind-driven generator and construction method thereof

Abstract: A wind-driven generator whose nacelle (3) is weight-reduced for using a versatile crane when constructing the wind-driven generator. The wind-driven generator has a yaw system (10A) equipped with a yaw driving device (15A), a yaw slewing ring (11A), and a yaw brake (20A) and slewing the nacelle (3) installed at the upper part of a support (2) according to the direction of the wind. The yaw system (10A) is disposed on the side of the upper part of the support (2).

Experimental Study of Four-Point Contact Ball Bearing with Deformable Rings

Abstract: When a ball bearing is designed with thin rings or is mounted in a flexible housing, the assumption of rigid rings is not true anymore. In this article, an experimental study is presented and a comparison with a numerical model is performed. The numerical approach is based on the coupling between a semi-analytical code and a finite element (FE) model that computes the deformation of the rings and housings. The numerical model accounts for ring ovalization, raceway opening, change of conformity, and structural displacements of the whole assembly. The experimental setup allows investigation of the load–displacement behavior of a four-point contact ball bearing submitted to a static thrust loading. Displacements are measured by an optical method (stereo-correlation) that enables comparison of the surface deformation of the two tested bearings and computation of the rigid-body displacement of the inner ring with respect to the outer ring. A comparison between experimental results, numerical results, with and ...