Slewing bearing

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

Orbit-changed walking car of hoisting equipment

Abstract: The utility model relates to an orbit-changed walking car of hoisting equipment The walking car comprises a frame, wherein wheels are arranged in the middle of the bottom end of the frame, in positions near both ends; a plurality of lifting oil cylinders are also arranged at the middle of the bottom end of the frame; a slewing bearing is arranged at the middle of the top end of the frame; the top end of the slewing bearing is connected with the bottom end of the hoisting equipment; a support baffle plate arranged on the hoisting equipment is connected with one side of the slewing bearing through steering oil cylinders arranged horizontally The orbit-changed walking car provided by the utility model has the beneficial effects as follows: the working range of the hoisting equipment in orbit running is enlarged; the working efficiency is improved; the operating requirement of engineering machinery is met; the investment cost of the equipment is lowered, and the energy conservation and the consumption reduction are realized

New load distribution method for one-row slewing ball bearing considering retainer force

Abstract: This paper studied the load distribution for one-row slewing ball bearing. The contact force between the balls and raceways is calculated based on Hertz contact theory. The retainer force was considered for satisfying the force equilibrium of the balls because the contact forces from two raceways are not on the same plane. Also, there is no reaction moment for each raceway in the axial direction, so each raceway freely rotates about each axial axis. The direction of relative displacement of the two raceways is shown to differ from the direction of combined loads due to contact geometric nonlinearity of the slewing bearing. The retainer reduces the number of contact balls in the slewing bearing, so the maximum contact load increases compared to when the retainer is not considered.

Crawler type gantry crane

Abstract: The invention discloses a crawler type gantry crane which is a major improvement of the prior art. The structure is structurally characterized by comprising a trolley, a gantry structure, a crawler operation mechanism, a power source, a hydraulic system and an electric apparatus, wherein the trolley can move horizontally along the X direction of a main beam through a trolley frame and a trolley track; the main beam is provided with a support leg; the lower end of the support leg is connected with the two ends of a lower cross beam; a lower flange of the lower cross beam is welded at the lower end of the lower cross beam, the lower end of the lower cross beam is connected with an inner ring bolt of a slewing bearing; and a structural flange of a chassis structure is connected with an outerring bolt of the slewing bearing. The chassis structure is provided with a crawler and drives the equipment to move horizontally along the Y direction so as to ensure spatial three-dimensional operation of the load and meet the need for linear or curved layout of the reactor of a nuclear power plant.

Gas pressurization type serrated knife cutting performance test device

Abstract: The invention discloses a cutting performance test apparatus used for the gas-pressurized cutters of the tunnel construction field, comprising a vertical column, a cross beam, a support plate, a guiding cylinder, a guiding cylinder cover, a cutter frame, a dynamic sealing, a cutter, a hydraulic cylinder, a soil bin, a soil-bin sensor, a soil-bin cover, a pipe joint, a static sealing, a slewing bearing, a slewing seat, a small gear, a motor, a slewing seat and a groundwork seat The connection style is as follows: the vertical column is fixed on the groundwork and the cross beam is arranged on the upper end of the column; the guiding cylinder is connected with the cross beam through the support plate; the lower end of the guiding cylinder is extended into the soil bin; the bottom of the hydraulic cylinder is connected with the guiding cylinder cover; the lower end of the column is connected with the cutter frame; the sealing is arranged respectively between the soil-bin cover and the soil bin and the guiding cylinder; a gas pressurizing system brings pressure to the soil bin through the pipe joint on the bin cover; the outer ring of the slewing bearing is connected with the soil bin and the inner ring is connected with the slewing seat and the slewing bearing is driven by the motor arranged on the groundwork The invention can realize the test for the cutting performance of cutters under different geological conditions so as to provide the experimental basis for studying the cutting mechanism of cutters and optimizing cutters

Crawler belt self-walking type lifting platform truck

Abstract: The utility model provides a crawler belt self-walking type lifting platform truck which is applied to environments with bad road conditions The technical scheme is that the crawler belt self-walking type lifting platform truck comprises a crawler belt walking mechanism and an installation under frame which is arranged on the crawler belt walking mechanism through a slewing bearing A lifting platform is arranged on the installation under frame