Slewing bearing

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

Direct shear test system for anisotropy of geosynthetics and implementation method of direct shear test system

Abstract: The invention discloses a direct shear test system for anisotropy of geosynthetics and an implementation method of the direct shear test system The direct shear test system comprises a test bed rack, a slewing bearing, a dial, a lower shearing box, an upper shearing box, a vertical loading device, a horizontal loading device, a guide rail, a displacement sensor, a slewing bearing control device and a bearing plate, wherein the guide rail and the displacement sensor are arranged on the test bed rack; the dial and the slewing bearing control device are respectively arranged on the slewing bearing; the vertical loading device is arranged on the slewing bearing sequentially through the bearing plate, the upper shearing box and the lower shearing box; the lower shearing box is driven to rotate by the slewing bearing; the cross section of a geosynthetic which needs to be subjected to a shear test is round, and the diameter of the geosynthetic is same as the outer diameter of the lower shearing box; the horizontal loading device is connected with the slewing bearing and can slide on the guide rail According to the direct shear test system for the anisotropy of the geosynthetics, the technical problem that the engineering practice cannot be truly reflected by the interface mechanical characteristics of the geosynthetics and fillings which are obtained in the test in the prior art is solved

Rotating rack used for spaceflight storage tank and particle treatment instrument and transmission mechanism of rotation rack

Abstract: The invention provides a transmission mechanism. The transmission mechanism is characterized by comprising a slewing bearing arranged on a rotation body in a sleeving manner; a pin wheel is firmly fixed to the outer ring of the slewing bearing; at least two gears are engaged with pin teeth of the pin wheel to form pin tooth transmission; the gears are connected with a zero-backlash speed reducer; and the zero-backlash speed reducer is directly connected with output shafts of two alternating-current servo motors controlled by a numerical control system with a double-servo-motor driving clearance removing technology. According to the other technical scheme of the invention, a rotating rack used for a spaceflight storage tank and a particle treatment instrument is provided. The rotation rack comprises a rotation body and is characterized in that the above transmission mechanism drives the rotation body to rotate; and a front rotation power base is arranged at the front end of the rotation body, and a rear rotation bracket base is arranged at the rear end of the rotation body. According to the designed rotation rack, a circle of large-load-bearing rollers are adopted for forming a load bearing machine base supporting the rotation rack, non-sliding driving and positioning are achieved under the cooperation of the gears or the pin teeth, and meanwhile a rotation angle value is obtained in a non-sliding manner according to a certain speed ratio through the gears or the pin teeth.

Laser cutting machine and closed detection method thereof

Abstract: The invention discloses a laser cutting machine which comprises an industrial robot and a laser cutting assembly The laser cutting assembly is installed at the tail end of the industrial robot through a laser cutting assembly installation seat and comprises a linear sliding table and a laser cutting head The laser cutting head is installed on the linear sliding table The linear sliding table is installed on the laser cutting assembly installation seat through a slewing bearing The mechanical axis of the laser cutting head and the center line of the slewing bearing are coaxial A mark point locating visual sensor is further arranged on the slewing bearing The invention further discloses a closed detection method based on the laser cutting machine of the structure The laser cutting machine is simple in structure, the laser axis incapable of being measured is converted into the mechanical axis capable of being measured, the position of the axis of a polished shaft is determined, closed detection can be finished in the trial cut process, efficiency is high, the number of rejected products can be effectively reduced, and cost is reduced

Equipment and method for assembling impeller of offshore wind power generator unit

Abstract: The invention discloses equipment and a method for assembling an impeller of an offshore wind power generator unit. The equipment for assembling the impeller of the offshore wind power generator unit, provided by the invention, comprises a slewing bearing, a cylindrical support body and a driving unit, wherein the outer ring of the slewing bearing is fixed on a mounting platform; the cylindrical support body is connected to the inner ring of the slewing bearing and can rotate together with the inner ring; the upper flange of the cylindrical support body is provided with a hole used for mounting an impeller hub; the driving unit is arranged at the outer side of the main body of the cylindrical support body and can rotate together with the cylindrical support body; and the driving unit is used for driving a pinion wheel meshed with the outer gear ring of the slewing bearing to rotate. According to the equipment and the method, the hidden trouble that a vane can fall into the sea when the impeller is assembled on the sea can be eliminated.