1829 results about "Slewing bearing" patented technology

The invention relates to a quick-changing method of a bale revolving platform revolution shafting bearing, which is characterized in that four steel pipes are adopted as upright posts; the four upright posts are vertically distributed on the circumference of the base of the bale revolving platform; then a construction method that a jack is transposed and put to compensate a lifting point is adopted; four jacks not less than 200t are entirely utilized to lift a rotation platform at the upper part of a revolution shafting bearing, so as to ensure the revolution shafting bearing to be completely exposed on a groove at the base of bale revolving platform and to move the revolution shafting bearing in parallel for changing. The quick-changing method has the advantages of fast speed of changing the revolution shafting bearing, high safety performance, low construction cost, and high changing quality.

The invention discloses a hydraulic foldable arm telescopic crane for ships, belonging to the technical field of ship manufacturing. The crane comprises a base, a vertical column and a telescopic suspension arm, wherein the base is welded on a ship deck substrate; the telescopic suspension arm is controlled by a first cylinder; a hoisting winch is mounted at the lower end of the telescopic suspension arm; an inner arm which is folded through a third cylinder is hinged between the top of the vertical column and the telescopic suspension arm; a second cylinder for folding the telescopic suspension arm is arranged below the inner arm and is hinged with two ends of the inner arm, respectively; the bottom end of the vertical column is connected with the base through a slewing bearing; a pump station and a wireless remote receiver are mounted on the vertical column; the first cylinder, the second cylinder and the third cylinder are all communicated with the pump station; the wireless remote receiver is electrically connected with a motor of the pump station through a controller. By adopting the hydraulic foldable arm telescopic crane, the problem that the running speed of a ship body is affected as a crane for the ship can only operate in a single direction and cannot be folded up is solved.

The invention discloses a double-portal type round stock ground scraper stacker-reclaimer, comprising a center stand column, a travelling device I, a portal I, a scraper reclaimer I, a rotary steel structure I, a cantilever stocker, a travelling device II, a portal II, a scraper reclaimer II and a rotary steel structure II, wherein the center stand column is fixed on ground foundation in the center of a stock ground; the cantilever stocker, the portal I and portal II respectively rotate by taking the center stand column as the center of rotation; the rotary steel structure I is connected with the center stand column by a rotary bearing, one end of the portal I is hinged with the rotary steel structure I, the other end is supported on the travelling device I operating on the round orbit on the upper part of a stock stop wall; one end of the scrapper reclaimer I is hinged with the lower part of the portal I, and the other end is hung on the portal I; the rotary steel structure I is positioned below the rotary steel structure II, and the device I and the device II are arranged in the same way. In the invention, two scraper reclaimers arranged on respective portal take two stocks simultaneously, thus realizing the purpose of mixing evenly, and having simple structure and high production efficiency.

The invention provides a slewing bearing ferrule circular degree error automatic detection and correction device, and belongs to the technical field of industrial detection and correction. The slewing bearing ferrule circular degree error automatic detection and correction device comprises a lathe bed, ferrule supporting and slewing driving devices, circular degree error detection devices, circular degree error correction devices, lifting and warping-resisting devices and a data collecting operation and display system. The ferrule supporting and slewing driving devices support a slewing bearing ferrule to rotate for one circle, the data collecting operation and display system collects the data output by the circular degree detection devices, the circular degree error values, the correction positions and the correction strokes can be obtained, and the circular degree error correction devices automatically carry out pressure correction according to the calculated results. According to the slewing bearing ferrule circular degree error automatic detection and correction device, the lifting and warping-resisting devices are adopted so that interferences between detection and correction and planar warping of the ferrule can be avoided, three eddy-current sensors are adopted in the circular degree error detection devices, the discretion fast Fourier transform is carried out on the collected signals so that the interferences of the eccentric errors of the slewing bearing ferrule can be eliminated, and the detection accuracy is improved.

An emulation test bench for vehicle operating of rail locomotive based on differentia transmission is composed of a plurality of test units each having the structure as follows: a driving mechanism is connected with a left and a right rollers, which are supported on a left and a right U-shaped frames which are mounted on the inner walls of the left and right roller bases through vertical linear bearings on the side walls thereof; the left and right roller bases are mounted on a base, on which the bottoms of the left and right U-shaped frames are connected through a vertical hydraulic vibration exciter; the external ends of the left and right roller shafts are connected with a transverse hydraulic vibration exciter which is fixed on the base; and the left and right roller bases are mounted on the base through a revolving bearing and is connected with a revolving vibration exciter thereof. The test bench can simulate the motion of locomotives on railways, the smooth operation state of locomotives, perturbations on the lines irregular vertically and transversely and bended laterally and transversely, and the moving sate of locomotives on curved lines.

The invention provides a method for replacing a whole large-ladle revolving platform when an upper lifting space is limited, which can quickly replace a revolving bearing and a pedestal and has higher safety, short construction period and lower construction cost. The method comprises the following steps: making a shoulder-pole beam pass through the upper middle of the revolving platform, and using two hooks of an overhead crane to hook both ends of the shoulder-pole beam; filling cushion blocks on upper parts of connecting rod holes for connecting rods to pass through on a box body, and making upper parts of the connecting rods contact the bottoms of the cushion blocks; taking four connecting rods on the upper part of the revolving platform as suspension centers, and using suspension bands to bundle the four connecting rods and the shoulder-pole beam; lifting the shoulder-pole beam, making a revolving body above the revolving bearing lifted for a certain distance along with the shoulder-pole beam, horizontally moving the shoulder-pole beam, and driving the revolving body to be deviated from an axial line of the revolving platform; using a hanger to lift away the prior revolving bearing and the prior pedestal, and placing a novel revolving bearing and a novel pedestal; and assembling the revolving body.

A motion assembly that produces pitch and roll motions includes lower and upper plates. A pivotable coupling having upper and lower shafts extending from its center is coupled between the upper and lower plates. At least two linear actuators are coupled between the plates. Extension and retraction of the actuators pivots the upper plate about the pivotable coupling relative to the lower plate. A vehicle includes two steerable propulsion wheels coupled to a chassis. A lower plate of a pitch and roll assembly, similar to that just described, couples to the chassis via a slew bearing. Seating is coupled to the upper plate. The seating rotates with respect to the chassis via controlled rotation of the slew bearing with reference to the chassis. The seating can be rotated to point in any direction with respect to the chassis regardless of the direction the steerable propulsion wheels move the chassis.

The invention discloses a bolt tightening machine for connecting a slewing bearing and a hub. The bolt tightening machine comprises a tightening shaft device (1) and a central rotating shaft (21), wherein the central rotating shaft (21) is connected with a positioning bracket rotating with the central rotating shaft (21); the positioning bracket is provided with a circumferential rotation drive device (3); the circumferential rotation drive device (3) is connected with a tightening shaft bracket (4) rotating with the circumferential rotation drive device (3); and the tightening shaft device (1) is arranged on the tightening shaft bracket (4). The bolt tightening machine also comprises a control device connected with the circumferential rotation drive device (3) and the tightening shaft device (1), so that the control device controls the tightening shaft device (1) to move to the position of each bolt needing tightening and completes the tightening action of the bolt. The bolt tightening machine can improve the efficiency of tightening the bolt on one hand, and can improve the quality of tightening the bolt on the other hand.

A multifunctional arching drill jambo comprises a main machine platform (6). The bottom of the main machine platform is provided with a chassis (8); the two sides of the main machine platform are provided with supporting legs (9); the front portion of the main machine platform is provided with a truck with crane (7) through a slewing bearing; the rear portion of the main machine platform is provided with two parallel mechanical arm racks (3) with mechanical arms (1) and a drill arm rack (5) with a rock drill system (4); the drill arm rack is arranged between the two mechanical arm racks; and the mechanical arms (1) and the rock drill system (4) are provided with quick-dismounting baskets (2). According to the multifunctional arching drill jambo, arch construction can be conducted while three kinds of steps of a tunnel are excavated, all the construction procedures of arch butt joint, bar-mat reinforcement hanging, cross rib welding, anchor rod installation and advance small pipe support can be achieved, and the efficiency of the multifunctional arching drill jambo is far higher than that of manpower.

The invention discloses an industrial-robot-based abrasive belt grinding device for profiles of a controllable pitch propeller and a manufacturing method of the abrasive belt grinding device and mainly solves the problems caused in numerically-controlled machine tool type manufacturing, such as high cost, instability in machining precision and low efficiency due to manual grinding, occupational hazards of polishing and the like. The device mainly comprises a six-freedom-degree industrial robot, an abrasive belt grinding mechanism and a numerical control rotary table, wherein the abrasive belt grinding mechanism which is arranged in a triangular structure is connected with an end joint of the robot through a flange; a motor achieves high-speed rotation of an abrasive belt driving wheel through a synchronous belt; a pneumatic mode drives a tension wheel to achieve abrasive belt tension; a workblank of the controllable pitch propeller is installed and clamped in the center of the rotary table; and a servo motor drives an output gear of a reduction box to be meshed with a gear ring of a slewing bearing so as to achieve continuous 360-degree rotating and indexing. The abrasive belt grinding device is ingenious in structural design and high in grinding rigidity and universality, reduces the production cost greatly and has excellent practical and promotional values.

The invention provides a monorail single turnout system of a suspension type rail transit system which can better adapt to complicated rail transit networks and realize automatic separation of turnouts. The monorail single turnout system comprises a turnout girder body having a main line and a branch line, a movable rail, a guide plate, correction rails and a locking device. The movable rail is located between the main line and the branch line; the front portion of the movable rail is installed on a first toothless slewing bearing and the movable rail is driven to swing by a first driving device. The guide plate is connected with the rear end of the movable rail through a second toothless slewing bearing. The correction rails are located between the lower side of the guide plate and the turnout girder body and are driven by a second driving device. The locking device is located on the turnout girder body and is used for locking the relative positions of the movable rail, the guide plate and the correction rails.

The invention discloses an on-line large slewing bearing residual life prediction method based on multi-dimensional data drive. The method includes the steps of firstly, conducting a full-life fatigue test on a slewing bearing, and obtaining multiple sets of vibration acceleration signal monitoring data of the whole test cycle of the slewing bearing; secondly, decomposing a vibration signal into a plurality of intrinsic mode functions (IMFs) through ensemble empirical mode decomposition (EEMD), and selecting a plurality of IMFs which can reflect performance degradation of the slewing bearing for signal reconstruction through principle component analysis (PCA) so that the aim of filtering noise elimination can be achieved; thirdly, conducting PCA on multi-dimensional acceleration signals at different stages and signals of the initial period of the test so as to obtain one-dimensional continuous SPE (C-SPE), reflecting the change situations of the multi-dimensional acceleration vibration signals on the basis of the one-dimensional C-SPE, calculating multiple time domain characteristics of the C-SPE, and establishing a performance degradation model of the slewing bearing. The method is few in manual intervention process, and the prediction result is closer to the engineering practice.

The invention provides a gap detection device of a large slewing bearing and belongs to the technical field of industrial measurement. The gap detection device comprises a radial error detection table, three groups of symmetrically-distributed axial error detection tables, a detection working table frame with a spiral pressing plate clamping mechanism, a slewing bearing to be detected, a controller and a displayer. Each axial error detection table comprises an axial servo motor, an axial rolling guide rail, an axial ball screw, a centering mechanism, an axial screw nut, an axial servo electric pushing rod, an axial working table plate, an axial base and an axial displacement sensor. The radial error detection table comprises a radial servo motor, a locking mechanism, a radial ball screw, a radial rolling guide rail, a radial screw nut, a radial working table plate, a radial servo electric pushing rod, a fork head, a radial base and a radial displacement sensor. The gap detection device of the large slewing bearing has the advantages of being high in detection accuracy, convenient to operate and high in detection efficiency.

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.

The invention relates to a suction type garbage collecting car. The suction type garbage collecting car comprises a car underpan. The car underpan is provided with a suction device and a sealed garbage box. A suction opening of the suction device communicates with the interior of the garbage box through an air sucking pipeline. An air exhausting opening of the suction device communicates with the outside atmosphere through an air exhausting pipeline. The top of the garbage box is provided with a suction arm which communicates with the interior of the garbage box. One end of the suction arm is rotationally connected with the garbage box through a slewing bearing. The slewing bearing is driven to rotate by a hydraulic motor so as to drive the suction arm to rotate. The other end of the suction arm is used for sucking garbage. The suction type garbage collecting car is reasonable in design and simple in structure, the garbage can be sucked and compressed, the garbage collecting efficiency is high, the functions of filtering, deodorizing and noise reducing are achieved, the air-exhausting and purifying effects are good, the noise pollution is small, the operation environment is greatly improved, and the environmental-friendly requirements are met.

The invention discloses a vertical mill, which comprises the following parts: feed inlet, discharge port, grinding roll, grinding disk, pressuring device, grinding roll, grinding disc gap adjusting device, rotary bearing, bearing support, deceleration device and stand, wherein the stand is fixed on the ground; the bearing support is set on the stand or ground directly; the grinding disk is set on the bearing support through rotary bearing; the output end of deceleration device connects the rotary coil of rotary bearing through flange, gear or other driving part, which can be gear deceleration device and belt deceleration device or the combination with two devices on the bearing support, stand or ground directly.

The invention relates to the technical field of machinery, in particular to a slewing bearing overturning mechanism. The slewing bearing overturning mechanism comprises two ground rails and a travelling trolley, wherein the two ground rails are parallel to each other; the travelling trolley is arranged between the two ground rails and above the two ground rails; a gantry bracket is arranged on thetwo ground rails; a pair of opposite guiding rail sliders is arranged on the side wall of the gantry bracket; a connecting assembly is arranged on the guiding rail sliders; a rotating motor and a third speed reducer are arranged behind the connecting assembly; a rotating device is arranged in front of the connecting assembly; an output shaft of the rotating motor is coaxially connected with an input shaft of the third reducer; and an output shaft of the third reducer is fixedly connected to the rear end of the rotating device through the connecting assembly. By using the slewing bearing overturning mechanism, the inner ring, the outer ring and assemblies of a slewing bearing are automatically overturned to facilitate the machining and assembling of the slewing bearing. The slewing bearingoverturning mechanism has the advantages that the structure is compact, the assembling is convenient, the occupation of a crane is avoided, the safety of workers is ensured, and the overturning efficiency is improved.

Disclosed is a grain harvesting articulated combine of a forward PPU, a rear grain cart, and an articulation joint that connects the forward PPU with the rear grain cart. The rear grain cart includes an ascending lift auger assembly that receives clean grain from the forward PPU and transports it upwardly for dumping into the rear grain cart. A generally horizontal drag auger assembly moves clean grain to a lower a lift auger assembly. A clean grain off-loading auger assembly is connected to the lower lift auger assembly by a slew bearing. The clean grain off-loading auger is retractable about its upper end and its upper end assembly is terminated with a spout adapted to direct clean grain generally downwardly. The clean grain off-loading auger assembly is rotatable from a grain off-loading position to a home position.

The invention aims to provide a method for disassembling a revolving bearing of a large-ladle revolving platform, which can quickly disassemble the revolving bearing and has higher safety, short construction period and lower construction cost. The method comprises the following steps: firstly, disassembling bolts which connect the prior revolving bearing inner race and a pedestal flange; secondly, filling a cushion block on the upper part of a connecting rod hole for a connecting rod to pass through on a box body, and making the upper part of the connecting rod contact the bottom of the cushion block; thirdly, using four jacks to synchronously lift four ladle arms, and making the prior revolving bearing and a revolving body above the prior revolving bearing move up for a certain distance together; fourthly, arranging a tray which is positioned on a guide rail under the prior revolving bearing; fifthly, disassembling bolts which connect the prior revolving bearing outer race and an upper revolving body, and making the prior revolving bearing fallen on the tray; sixthly, making the tray on the guide rail move in the radial direction along the revolving platform, and making the prior revolving bearing deviated from an axial line of the revolving platform; and seventhly, lifting away the prior revolving bearing.

The invention relates to a rotary bearing flange of a portal jib crane of a large-diameter rotary supporting bearing which is made by combining and utilizing the traditional metal processing skillfully. The technical scheme is as follows: the rotary bearing flange of the portal jib crane comprises a flange and a cylinder, and toggle plates are uniformly arranged at intervals on the flange and a transitional cylinder; the flange and the cylinder are welded together; and the flange is manufactured in the following steps: a bar is forged into a square blank with allowance and is then transferred to a machine after heat treatment, rough metal processing is carried out, and then the blank is pressed into required equally-divided ring blocks by an oil press, then the allowance is cut and chamfering is carried out, ground sample assembly is done on a platform, then the ring blocks are butt-welded into a ring, and then fine finishing is carried out on the ring until the flange of the given size is obtained. The rotary bearing flange of the portal jib crane has the beneficial effects of easy manufacturing, high yield and low cost.

The invention discloses a three-axis simulation flight simulator executing mechanism. The mechanism includes a roll platform, a pitch platform, a yaw platform, and a base platform. The roll platform includes a front cabin, a rear cabin, a roll motor, a roll reducer, a roll sprocket pair minor sprocket, a roll cylindrical bore self-aligning roller bearing, and a large-diameter rubber roller pivotalbearing inner ring. The pitch platform includes a pivotal bearing outer ring, a U-shaped frame, a roll sprocket pair large sprocket, a roll bearing seat, a pitch sprocket pair large sprocket, a pitchright shaft, a pitch cylindrical bore self-aligning roller bearing, and a pitch left shaft. The yaw platform includes a U-shaped bracket, a pitch bearing seat, a pitch motor, a pitch reducer, a pitchsprocket pair minor sprocket and a yaw bearing seat. The base platform includes a base, a base bracket, a large-diameter pivotal bearing, a yaw motor, a yaw reducer, an open internal gear meshing pair small gear, and support feet. The mechanism of the invention can simulate that a single person operates an aircraft to perform three degrees of freedom of roll, pitch and yaw movements to realize asimulated flight function.