Showing papers on "Slewing bearing published in 2012"

A finite-element analysis of the connecting bolts of slewing bearings based on the orthogonal method

Abstract: This paper presents an analysis of the main factors affecting the performance of connecting bolts for slewing bearings. For double row four-point contact ball bearings, major factors include the preload, friction coefficient and height of the bushes. First, bolt connection performances with different levels of each factor are calculated with the finite element method (FEM). Then, the calculation results are analyzed with the orthogonal method. The analysis indicates that the preload is the most important factor affecting the bolt connection performance, followed, to a lesser degree, by the height of the bushes. The friction coefficient is the least important factor.

Device and method for conveying thick matter, in particular concrete, with angle of rotation measurement

Abstract: In a device for conveying thick matter, in particular concrete, with a thick matter pump, with a conveying line which leads away from the pump and with a mast boom which receives the conveying line, has at least one mast arm and is arranged on a slewing bogie preferably provided with a slewing ring, which slewing bogie, for the purpose of the angular orientation of the mast boom, can be rotated by means of a drive, in particular a hydraulic motor with a transmission arranged thereon, preferably via a transmission pinion acting on the slewing ring of the slewing bogie, and with a measuring device which is equipped with angle of rotation sensors and is intended for measuring the angle of rotation of the slewing bogie, the angle of rotation of the slewing bogie is measured by a direct measurement of the angle of rotation of the drive or of the transmission arranged between the motor and slewing bogie.

Slewing bearing structure

Abstract: There is provided a slewing bearing structure capable of maintaining favorable bearing performance by adjusting and changing rigidity thereof while minimizing the increase in the weight thereof for preventing distortion of a pressure pattern caused by structural deformation from unfavorably affecting the bearing performance. A slewing bearing of a rolling bearing, in which a rolling element is put between bearing rings and formed on an inner ring and an outer ring, has a slewing bearing structure in which a rigidity strengthening portion, at which rigidity of the inner ring and/or the outer ring is increased more than that at peripheral portions, is formed at a circumferential area where a bearing contact pressure is high.

Mounting equipment for steel tunnel arches

Abstract: Mounting equipment for steel tunnel arches comprises a travelling chassis and a slewing bearing. A power control platform and an executive device are mounted at the top of the slewing bearing. The power control platform comprises a power unit, a hydraulic system, an electrical system and a control room. The executive device comprises three arms, claws and baskets. One claw and one basket are disposed at the front end of each arm. The rear ends of the three arms are connected with a rotary platform through cross hinges. A luffing cylinder is connected between the lower middle of each arm and the rotary platform. Each luffing cylinder is connected with the rotary platform through a cross hinge. The luffing cylinder is controlled via the hydraulic system. The mounting equipment can be used for conveying and mounting the steel arches, so that labor intensity is reduced for workers, construction progress is quickened, and security accidents caused by collapse of excavation faces are reduced.

Orchard self-propelled lifting operation platform

Abstract: The invention discloses an orchard self-propelled lifting operation platform which comprises a hydraulic system, a traveling mechanism and an engine (13). The orchard self-propelled lifting operation platform is characterized by being provided with a rotary device, a lifting device, an operating platform and an operation table. The rotary device comprises a rotary component and a rotary upright column (3), the rotary component comprises a hydraulic motor (15), a worm and gear reducing mechanism (16) and a slewing ring bearing (14), and the rotary upright column can perform a 360-degree stable rotation on a base plate through the slewing ring bearing. The lifting device comprises a support arm (6), a lifting arm (5) and a lifting oil cylinder (4), and the operation table (9) can ascend or descend in a range from 1m to 6m. Each of the four corners of the base plate is respectively provided with a support leg (12) and a support leg controlling oil cylinder (19). The orchard self-propelled lifting operation platform has the advantages of being flexible in moving and traveling, free in lifting and rotating, and convenient and safe to operate.

Composite slewing bearing

Abstract: The utility model provides a composite slewing bearing. The bearing comprises a central slewing bearing (104) and peripheral bearings arranged around the central slewing bearing, wherein the central slewing bearing comprises first slewing parts (106), second slewing parts (107) and a plurality of rollers (108); the second slewing parts surround the first slewing parts; containing space is formed between the peripheral surfaces of the first slewing parts and the inner surfaces of the second slewing parts; the plurality of rollers are installed in the containing space; and the peripheral surfaces of the second slewing parts are toothless. The composite slewing bearing can be applied on the front one of two crawler cranes carrying out joint operation and can provide huge support force and side tumbling resistance to the upper vehicle of the front crawler crane, thus ensuring the cranes to have better operation stability and safety during large operation.

Fork truck rotary lifting support accessory

Abstract: The utility model discloses a fork truck rotary lifting support accessory, comprising forks fixed on a rotary support, which is connected to a back plate of a lifting support through a slewing bearing; an inner ring bearing of the slewing bearing is in fixed connection with the rotary support; an outer ring bearing of the slewing bearing is in fixed connection with the lifting support; the inner ring bearing is driven by a hydraulic motor, which is fixed on the back plate of the lifting support; the rotary support is provided with a folk stringing shaft; and one end of each folk is sleeved on the folk stringing shaft. The fork truck rotary lifting support accessory is widely applicable to industries, such as foodstuff, automatic production, chemical industry, recycle, smelting and casting, and to occasions where rotary roll-over and stirring of hoppers or boxes are required.

Loading device for shield main bearing axial force

Abstract: The utility model discloses a loading device for shield main bearing axial force. The loading device for shield main bearing axial force comprises a bed, a fixing face plate, a shield main bearing, a loading arm and a motor, the bed and the fixing face plate are fastened, an outer ring of the shield main bearing and the fixing face plate are fixed by a high-strength bolt, a press plate, a thrust bearing and a connecting plate are sequentially arranged on the outer side of the shield main bearing from inside to outside, the loading arm is fixed with the connecting plate, the press plate, the thrust bearing and the connecting plate are fixedly integrated with an inner ring of the shield main bearing through bolts, axial loading oil cylinders are arranged on the fixing face plate, a gear shaft (12) is arranged on the bed, a pinion arranged at one end of the gear shaft is meshed with teeth on the inner ring of the shield main bearing, a bevel gear I is arranged at the other end of the gear shaft and meshed with a bevel gear II on a spline shaft, and the spline shaft is connected with the motor. A complete guarantee system is provided for production and detection of the shield main bearing and a large-scale slewing bearing, production process of products can be continuously improved and instructed, and production technology is simplified.

Furnace top chute feeder for blast furnace

Abstract: The present invention discloses a furnace top chute distributor for a blast furnace, including an airtight case, a choke, an upper slewing bearing, a rotating sleeve, a chute, a universal frame, a lower slewing bearing, a dial wheel assembly, a cylinder and a horizontal driving apparatus for driving the upper slewing bearing to rotate. The choke extends through a top cover provided on top of the airtight case and into the airtight case. An inner ring of the upper slewing bearing is connected with the top cover. The rotating sleeve on which a lug is provided is connected with an outer ring of the upper slewing bearing, and the chute is hung within the rotating sleeve via the lug. The lug is connected to one end of a crank, while the other end of the crank is positioned within a slideway of the universal frame. An inner ring of the lower slewing bearing is connected with the universal frame. One end of the dial wheel assembly is connected with the inner ring of the lower slewing bearing, while the other end thereof is positioned within a runner of the rotating sleeve. The cylinder is used for drawing the lower slewing bearing to move up and down. The furnace top chute distributor for a blast furnace according to the present invention has advantages, such as reasonable structure, long lifetime, the shortest gearing chain, more stable operation, and no lateral force to the guide rail.

Slewing bearing replacement device for crane

Abstract: The utility model discloses a slewing bearing replacement device for a crane, which comprises a rail support and a pair of hydraulic jacks. A pawl hole is arranged on the upper surface of the rail support, a pawl mechanism is arranged on the pawl hole and connected with a longitudinal pushing hydraulic cylinder, the pushing hydraulic cylinder is connected with a lug plate of a clamp ring, two groups of lifting cylinders and two groups of mechanical jacks are mounted on the lower portion of the rail support, the lower ends of each group of lifting cylinders and each group of mechanical jacks are arranged on a jack support, the two jack supports are connected with the lower portion of the rail support through a plurality of diagonal adjustable pull rods, and the hydraulic jacks are arranged on a lower fixer and abutted to the surface of the lower edge of an upper rotator. The replacement device is capable of replacing slewing bearings without the aid of a second crane, so that working efficiency is improved.

Flexible and fast clamp device

Abstract: A flexible and fast clamp device comprises a bottom plate. A guide rail support is disposed respectively on the left of the bottom plate and on the right of the bottom plate. A carriage is installed respectively on each guide rail support through each guide rail, and a V-type block used for locating a slewing bearing journal of a crank shaft is arranged on each carriage. A rotary oil cylinder pressing plate mechanism is tightly pressed on the slewing bearing journal of a crank shaft. Self-centering mechanisms are arranged on side edges of a crank throw in the middle of the crank shaft and clamp two sides of the crank throw so as to realize auxiliary positioning. The rotary oil cylinder pressing plate mechanism comprises a pressing plate tightly pressing on the slewing bearing journal of the crank shaft. One end of the pressing plate is fixed on an oil cylinder base through an adjustable screw, and an oil cylinder connected with the middle of the pressing plate is installed on the oil cylinder base. Each self-centering mechanism comprises a middle guide rail arranged on the bottom plate, and a middle support which realizes auxiliary positioning for the side edges of the crank throw is connected with each middle guide rail through a bent block oil cylinder. The flexible and fast clamp device has the advantages that the flexible and fast clamp device is simple in structure, convenient to use, good in locating stability in a clamping process, high in locating accuracy and work efficiency, and the like.

Slewing bearing assembling sling

Abstract: The utility model relates to a slewing bearing assembling sling, and belongs to the sling. The slewing bearing assembling sling provided by the utility model is characterized in that the slewing bearing assembling sling mainly comprises a hanging ring, a threaded rod, an upper positioning plate and a lower positioning plate, wherein the upper part of the hanging ring is annular, and the lower part of the hanging ring is cylindrical and is provided with an axial central screw hole; and the threaded rod is a double-end threaded rod, the upper section of the threaded rod is screwed in the central screw hole of the hanging ring, the upper positioning plate with the central screw hole is screwed on the upper part of the lower thread section of the threaded rod, the upper positioning plate can be a circular plate, the lower end part of the lower thread section of the threaded rod is screwed with the lower positioning plate provided with a central screw hole and a handle, and the lower positioning plate can be a circular plate. The slewing bearing assembling sling can rapidly and effectively lift and assemble a slewing bearing, eliminates potential safety hazards, ensures the product quality and enhances the work efficiency.

Welding wire hoisting mechanism

Abstract: The invention relates to a welding wire hoisting mechanism. An upright post is vertically arranged; a swing arm is horizontally arranged; one end of the swing arm is connected with the top of the upright post through a slewing bearing; an inner ring of the slewing bearing is fixed on the top of the upright post; an outer gear ring of the slewing bearing is connected to the swing arm; an electric chain hoist is hung to the swing arm through a walking wheel of the electric chain hoist; a wire fixing plate rack is arranged below the electric chain hoist; the swing arm is provided with a plurality of cable hoisting rings distributed at equal intervals, and a steel wire rope passes the cable hoisting rings and is connected with the electric chain hoist; a driving motor is fixed on the upright post; the output shaft of the driving motor is provided with a gear through a check ring; and the gear is meshed with the outer gear ring of the slewing bearing. The welding wire hoisting mechanism is simple and compact in structure, hoists welding wires under the action of the electric chain hoist, places the welding wires by driving the swing arm to swing through the driving motor, can greatly reduce the labor intensity of workers and has high automation degree.

Seal structure for slewing bearing, and slewing bearing

Abstract: In a seal structure for a slewing bearing, a seal member (5) has a base part (6) and lip parts (9), with one of the lip parts (9) including a main rib (7) that extends at a slant. An annular protruding part (16) that protrudes radially is provided closer to the end part than a seal sliding contact surface part (2c) at the peripheral surface of a recess-side bearing ring (2), and a seal-sliding-side slanted part (16a) that slants toward the protruding tip so as to be positioned to the outside in the axial direction is provided at the inside surface of the annular protruding part (16) in the radial direction. In a protrusion-side bearing ring (1), a seal-anchoring-side slanted part (13a) that slants toward a groove bottom-side portion so as to be positioned to the outside in the axial direction is provided at the inner surface of an anchoring groove (13) at the groove-side surface of the peripheral surface of the base part (6).

Fully variable frequency electric maintenance crane for rock breaking plant

Abstract: A fully variable frequency electric maintenance crane for a rock breaking plant comprises an upper rotary column, and the bottom end of a boom is hinged to a rotary shaft seat. The fully variable frequency electric maintenance crane for the rock breaking plant is characterized in that the upper rotary column is connected with a connecting flange through a slewing bearing, a slewing mechanism is fixed inside the bottom of the upper rotary column, the slewing mechanism comprises a motor, a reducer and a small gear, and the small gear is meshed with a large gear of the slewing bearing. Platforms are arranged in the middle of the upper rotary column, winches are disposed on the platforms, pulley sets are arranged at the top end of the upper rotary column and the top end of the boom, one end of a luffing steel wire rope is wound on one luffing winch, the other end of the luffing steel wire rope is fixed at the top end of the upper rotary column, one end of a main hook steel wire rope is wound on one main lifting winch, the other end of the main hook steel wire rope is fixed at the top end of the boom, one end of an auxiliary hook steel wire rope is wound on one auxiliary lifting winch, the other end of the auxiliary hook steel wire rope is fixed at the top end of the boom, a main hook is hung on the main hook steel wire rope, and an auxiliary hook is hung on the auxiliary hook steel wire rope. The fully variable frequency electric maintenance crane for the rock breaking plant is energy-saving and cost-reducing.

Slewing bearing with sliding element

Abstract: The bearing has sliding elements (2) formed as bearing bodies and arranged between an outer ring (1) and an inner ring (3). A regional structure is formed from the outer and/or inner rings closed in circumferential direction and supporting sleeves (4, 6) e.g. spacer sleeves. The supporting sleeves are distributed along circumference, and bridge a space between planar elements. Center distance of the supporting sleeve relative to the adjacent supporting sleeve corresponds between 0.5 times and 5 times of axial overall height of the bearing. The outer ring is joined by screws (5, 7).

Slewing drive device and engineering machinery with same

Abstract: The utility model discloses a slewing drive device and engineering machinery with the slewing drive device. The slewing drive device comprises power equipment, a speed reducer and a slewing bearing which are connected with one another sequentially; an output shaft of the speed reducer is provide with a slewing brake; and the slewing brake comprises a braking connection member and a braking friction member, wherein the braking connection member and the output shaft rotate coaxially, and the braking friction member is arranged oppositely to a friction art of the braking connection member. The utility model also discloses the engineering machinery with the slewing drive device. When a slewing mechanism of the engineering machinery needs to be braked, the braking friction member is operated to be in slow contact with the braking connection member, and friction is further given to the output shaft of the speed reducer, so that the rotation speed of the shaft is lowered gradually until the rotating stops, so as to achieve the braking purpose. The slewing drive device can reduce the impact force generated by the slewing mechanism in the braking process, reduce the damage on other mechanisms in the engineering machinery, prolong the service life of the mechanism, improve the accompanying vibration phenomenon in the braking process and reduce the control difficulty of the slewing position, and can be used for reducing the speed of the slewing mechanism.

Reinforced slewing bearing

Abstract: A bearing assembly for a first part that rotates with respect to a second part may include a slewing bearing having an axis of rotation and inner and outer races concentric with the axis of rotation. The inner race may be fixed to the first part and the outer race may be fixed to the second part. An inner, annular catch ring may be fixed to and adjacent to a lower surface of the inner race. An outer, annular catch ring may be fixed to and interposed between a lower surface of the outer race and the second part. A portion of the outer catch ring may be disposed below and adjacent to the lower surface of the inner race.

Slewing bearing deep hole processing device

Abstract: The utility model provides a slewing bearing deep hole processing device for a through hole with the length-diameter ratio thereof greater than seven, wherein the processing method is modified and auxiliary equipment is additionally provided. Due to the adoption of the device, after one side of the through hole is drilled and positioned through a positioning pin, the other side of the through hole is docked and drilled. Therefore, the length-diameter ratio of a drill bit is reduced and the rigidity of the drill bit is improved. Meanwhile, during the processing procedure, chips are smoothly removed and the drill bit is not easily broken. Processed hole walls are good in smoothness and the diameters of processed holes are unified. The work efficiency and the precision of a numerical control high-speed drill are fully improved. The quality of products is ensured and the production efficiency is increased. The slewing bearing deep hole processing device comprises a workpiece, a positioning pin, a backing plate, a first compression bolt, a first compression nut, a second compression bolt, a second compression nut, a pressing plate and a support. The backing plate is arranged on the workbench of a machine tool. A circular ring-shaped workpiece is arranged on the backing plate. The workpiece and the backing plate are equipped with prepared holes correspondingly. The positioning pin is arranged inside the prepared holes. The slewing bearing deep hole processing device is simple in structure and convenient in operation. Due to the adoption of the device, the butt joint of deep holes can be easily realized and the requirement of the position accuracy of the holes is satisfied. The slewing bearing deep hole processing device is scientific, efficient, accurate and practicable.

Deformation-preventing supporting device of slewing bearing

Abstract: Provided is a deformation-preventing supporting device of a slewing bearing, wherein a great deformation circumstance of a thin-wall slewing bearing is avoided in lifting, transporting and storing process, and installation and use of the slewing bearing can be guaranteed. The deformation-preventing supporting device includes a top cover, a chassis, connecting blocks, extending arms, female thread blocks, locking nuts, bolts and jack catches; the circular top cover and the chassis are concentrically and parallelly arranged; at least three connecting blocks are uniformly distributed between the top cover and the chassis and radially disposed; the extending arms are disposed on outer ends of the connecting blocks; the female thread blocks are disposed on the outer ends of the extending arms; the locking nuts are disposed on outer sides of the female thread blocks; the bolts are disposed in the locking nuts; the jack catches are disposed on the outer ends of the bolts; and rubber layers are disposed on surfaces of the jack catches. The deformation-preventing supporting device has simple structure, convenience in operation and high stability; and a force applied to supporting of a thin-wall bearing is moderate and uniform so as to guarantee installation and use of the slewing bearing.

Multi-rotor wind generating system with connecting rods

Abstract: The invention discloses a multi-rotor wind generating system with connecting rods, which comprises a tower 1, wind turbines, two slewing bearings 2, a framework 4, beams 5 and the connecting rods 8. A rotary driving device A is arranged on the top of the tower; a rotary driving device B is arranged in the middle of the tower; inner rings of the slewing bearings of the rotary driving device A and the rotary driving device B are fixed on the tower; the framework is fixedly connected to the outer rings of the slewing bearings of the rotary driving device A and the rotary driving device B; one end of each beam is connected with the framework; one end of each connecting rod is connected with the middle part of each beam, and the other end of each connecting rod is connected with the framework; wind turbines are fixedly connected with the beams; each wind turbine comprises a wind wheel 6 and a cabin 7; and the power of each wind turbine is 0.5-500kW. The multi-rotor wind generating system has the advantages that: blades have long service life, the occupied area is small, installation and maintenance cost is low, the reliability is high, the application range is wide, a slewing bearing or a rotary driving device in the cabin is eliminated, the bearings bear small force, and the beams bear small force.

Sleeve clamping device for full-sleeve and full-slewing drilling machine

Abstract: The invention discloses a sleeve clamping device for a full-sleeve and full-slewing drilling machine, relating to an earthwork mechanism. The sleeve clamping device comprises a lifting platform, four clamping cylinders, connecting rods, wedge blocks and reducing spacer bushes. The wedge blocks are connected with the inner ring of a slewing bearing through the connecting rods, and the outer ring of the slewing bearing is connected with the lifting platform. The reducing spacer bushes is fan-shaped arc boards with the inner arc radius being equal to the exradius of a sleeve; and the inner ring of a bull gear is made into a horn-shaped taper hole with the taper consistent with an inclined arc surface of each wedge block. The four clamping cylinders are uniformly distributed in an equal circumference way and used for connecting the lifting platform and a power supporting platform. When oil enters into rod cavities of the clamping cylinders, piston rods of the cylinders retract to pull the lifting platform to drive the wedge blocks to move to a transmission box, and the wedge blocks begin to clamp the sleeve in the moving process until the set clamping force is achieved. When a sleeve with a smaller diameter is replaced, only the corresponding reducing spacer bushes are required to be installed on all the wedge blocks.

Multi-rotor wind generating system capable of automatically facing wind

Abstract: The invention discloses a multi-rotor wind generating system capable of automatically facing wind The multi-rotor wind generating system comprises a tower, wind turbines, an A slewing bearing 2, a B slewing bearing 3, a framework 4, beams 5 and tail vanes 8; the A slewing bearing is arranged on the top of the tower; the B slewing bearing is arranged in the middle of the tower; inner rings of theA slewing bearing and the B slewing bearing are fixed on the tower; outer rings of the A slewing bearing and the B slewing bearing are connected with the framework; one end of each beam is connected with the framework; the wind turbines are fixedly connected with the beams; each wind turbine comprises a wind wheel 6 and a cabin 7; 2 to 100 wind turbines are arranged; the lengths of the beams on two sides of the framework are different; the longer beams are provided with more wind turbines than the shorter beams; the tail vanes are connected with the framework, the beams or/and cabins through pin rolls The multi-rotor wind generating system capable of automatically facing wind has the advantages that: blades have long service life, the occupied area is small, installation and maintenance cost is low, the reliability is high, the application range is wide, a slewing bearing or a rotary driving device in the cabin is eliminated, and the automatic wind facing and yawing are realized

Unlimited-angle double-rotation welding device

Abstract: The utility model discloses an unlimited-angle double-rotation welding device, which comprises a first rotary device, an L-shaped arm and a second rotary device. The first rotary device comprises a first motor, a first reducer, a first gear and a large slewing bearing, the first motor drives the first gear via the first reducer, the first gear is in meshed transmission with the large slewing bearing, and the L-shaped arm is connected to the large slewing bearing. The second rotary device comprises a second motor, a second reducer, a second gear and a small slewing bearing, the second motor drives the second gear via the second reducer, the second gear is in meshed transmission with the small slewing bearing, and the small slewing bearing is mounted on the L-shaped arm while a mounting table top for holding a workpiece is fixed at the end of the small slewing bearing. The unlimited-angle double-rotation welding device enables labor intensity of welding workers to be reduced greatly and production efficiency to be improved greatly.

Packaging palletizing robot

Abstract: The utility model discloses a packaging palletizing robot, and aims to solve the problems that a robot is low in stability and has a complicated structure The packaging palletizing robot comprises a base, a slewing bearing, a main body frame, an arm mechanism, a wrist, a gripper, and a horizontal adjustment mechanism for the wrist, wherein the slewing bearing is connected to the base; the main body frame is arranged on the slewing bearing and is connected with the base; the arm mechanism is connected with the main body frame through horizontal and vertical moving mechanisms; the wrist is connected to the arm mechanism and the horizontal adjustment mechanism for the wrist; and the gripper is connected to the lower end of the wrist The packaging palletizing robot can realize quick palletization; the speed of 1,000 times/hour can be reached; and moreover, the utility model also has the advantages that: the packaging palletizing robot has high bearing capacity and a compact structure, can act stably and reliably, and is low in energy consumption and small in floor area, a teaching method is simple and easy to understand, and the like