656 results about "Spiral line" patented technology

The invention discloses a refrigeration pipe welding positioning method and device. The method comprises the following steps that S1, branch pipes are placed in all storage boxes; s2, the main pipeline is placed in a matching groove of the supporting frame, and the main pipeline is fixed through cooperation with a pressing ring; s3, a third electric cylinder is started, the third electric cylinder drives a supporting frame and the main pipeline to move to be close to the welding gun, and a branch pipe of the main pipeline moves to cross the welding gun; s4, a first electric cylinder is started, and the first electric cylinder drives a synchronous plate and an ejector sleeve to move; the motor, the first chain wheel, the second chain wheel, the chain and the hollow rotating disc are matched to drive the vortex line groove and linear groove linkage adjusting block and the rolling wheel to move, the purposes of clamping positioning and circle center correction of the branch pipe are achieved, the branch pipe is corrected to the position concentric with the disc, the coaxiality of the branch pipe and a main pipeline branch pipe is guaranteed, and the machining efficiency is improved. And the quality problems of insufficient welding, welding skips, poor welding seam forming and the like caused by positioning deviation are avoided.

The input shaft and the output shaft of the shifting block type bidirectional non-return transmission mechanism are coaxial, and the shifting block type bidirectional non-return transmission mechanism is small in overall size, low in cost and convenient to use. The device comprises an input shaft, an output shaft, a second one-way shaft sleeve and a first one-way shaft sleeve which are coaxial, a middle pressing disc matched with the output shaft in a spiral line mode is arranged on the output shaft, and a first force transmission disc and a second force transmission disc are fixed to the output shaft. An arc-shaped groove is formed in the second force transmission disc, a shifting block arranged between the input shaft and the middle pressing disc penetrates through the arc-shaped groove, when the input shaft rotates by an angle a, the shifting block drives the middle pressing disc to rotate by the angle a relative to the output shaft, the middle pressing disc moves to the first limiting position from the second limiting position in the axial direction, and the central angle of the arc-shaped groove is not smaller than the angle a; when the middle pressing disc is in the first limit position, the middle pressing disc, the first force transmission disc and the first one-way shaft sleeve form a friction type transmission structure capable of transmitting torque; and when the middle pressure plate is in the limiting position II, the middle pressure plate, the force transmission plate II and the one-way shaft sleeve II form a friction type transmission structure capable of transmitting torque.

The invention discloses an optimization design method and a manufacturing method of a heating structure. The optimization design method comprises the following steps: constructing a spiral line heating wire parameter model with adjustable spacing and arc supplement; a design space is constructed, the standard deviation, the variable coefficient and the uniformity of the temperature of the temperature measuring point are used as evaluation indexes, and an optimal Latin hypercube sampling method is adopted for experimental design and simulation analysis to obtain a real response value; based on the training sample and the real response values of the three evaluation indexes, respectively constructing Gaussian process regression models, and performing model optimization by using a Bayesian optimization method; constructing a multi-objective optimization mathematical model based on design variables and objective function response values obtained by the optimized Gaussian process regression model, and solving an optimization parameter combination based on an NSGA-II algorithm; and verifying a multi-objective optimization result. According to the method, the relationship between the design parameters and the performance indexes can be more accurately captured, the optimization efficiency and accuracy are improved, and the surface temperature uniformity of the heating disc is more effectively improved.

The utility model relates to the field of machinery, and discloses a rotary tool for downhole operation, which comprises an upper joint, a protective outer cylinder is fixedly connected to the bottom of the upper joint, a spiral groove inner cylinder is sleeved in the protective outer cylinder, a plurality of spiral grooves are arranged on the outer wall of the spiral groove inner cylinder, a return spring is sleeved outside the spiral groove inner cylinder, and a plurality of spiral grooves are arranged on the spiral groove inner cylinder. The bottom end of the return spring is fixedly connected with a sliding connector, the bottom of the sliding connector is fixedly connected with a rotating inner cylinder, and the bottom of the rotating inner cylinder is fixedly connected with a lower connector. In the utility model, the rotation function is realized under the condition of no hydraulic power, the damage of external liquid to a coal reservoir is avoided, the rotation function can be realized only by moving up and down, the operation is simple and convenient, the risk that a pipe string is blocked in horizontal well sand fishing is reduced, the device is directly connected with a pen point, the distance is short, and the formed rotation torque acts on the sand surface, so that the operation is simple and convenient. And the passing capacity and efficiency of the bailing pipe string are improved.

The utility model relates to a biliary tract woven stent, which comprises a woven stent formed by weaving one or a plurality of woven filaments, the woven filaments are wound along the axis in a positive and negative spiral line mode and interwoven with one another, and the mutually staggered woven filaments form a lap joint buckle structure capable of freely sliding or a hooking buckle structure limited in sliding at nodes. According to the technical scheme, the structure is reasonable, the stent can be degraded automatically while the radial supporting force of the stent is improved, and the stent taking-out operation is omitted.

The invention belongs to the field of fluid machinery, and particularly discloses a centrifugal pump volute with a composite noise reduction structure. The centrifugal pump volute comprises a volute body with the base circle radius being R. A volute chamber is formed in the volute body, and a plurality of micro flow deflectors are distributed on the inner side of an inlet of the volute body in the circumferential direction; two sections of semicircular grooves are symmetrically formed in the upstream section of the volute inner wall baffle tongue front and back along the spiral line; two flow guide plates are arranged at a baffle tongue of the volute body, the flow guide plate close to one side of an inlet of the volute body is a front flow guide plate, and a plurality of flow guide holes are formed in the front flow guide plate; a plurality of cavities are uniformly arrayed on the wall surface of the baffle tongue of the volute body; and the bending directions of the micro flow deflectors and the flow deflectors are consistent with the water flowing direction. Inlet flow is optimized through the micro flow deflectors, vortex is restrained through the semicircular grooves, pressure pulsation is reduced through cooperation of the flow deflectors and the cavity structure, the hydraulic performance is kept while fluid noise is effectively reduced, and the comprehensive performance is obviously improved.

The utility model discloses a gas dynamic pressure radial bearing based on a tenon biological structure, and relates to the technical field of radial dynamic pressure gas bearings. Comprising a bearing rotor and a bearing sleeve, grooves are formed in the peripheral surface of the bearing rotor, the grooves are distributed in the cylindrical spiral line direction, the grooves are distributed in the circumferential direction of the bearing rotor at intervals to form a groove set, a zone area is formed between any two adjacent grooves, the section of the zone area is in a streamline shape, and the bearing rotor is arranged in the bearing sleeve. And in a non-working state, the table area is in contact with the inner wall of the bearing sleeve, and in a working state, gas outside the bearing can flow into the bearing sleeve from the gap, and a gas film with high internal pressure is formed in the middle of the bearing sleeve. According to the aerodynamic radial bearing based on the tenon biological structure, the bearing capacity of the bearing is enhanced, the stability of the bearing is improved, the friction loss in the bearing is reduced, the service life of the bearing is prolonged, and the stability of the bearing is improved.

The invention discloses rotary clamping equipment for a medium-caliber seamless steel pipe for fluid conveying and a using method, and relates to the technical field of steel pipe machining. The rotary clamping equipment for the seamless steel pipe for conveying the medium-caliber fluid comprises a rack, a steel pipe, a machine box and a supporting frame, and further comprises a chuck assembly which is coaxially and rotatably installed on the machine box and the supporting frame and used for fixing the two ends of the steel pipe. The double-row cylindrical self-aligning bearing is used for supporting the main shaft sleeve, passive self-adaptive self-aligning of the main shaft sleeve is achieved, a chuck assembly at the driving end can follow the instantaneous rotation axis of actual bending change of a steel pipe in real time, and a workpiece is not forced to conform to the theoretical axis of equipment; the problems of spiral line contact between the clamping jaw and the surface of the steel pipe, local stress concentration and periodic pulsation attenuation of clamping force caused by forced centering under traditional rigid clamping are solved, it is guaranteed from the source that the clamping jaw and the outer edge of the steel pipe always keep stable and uniform surface contact in the initial clamping stage and the rotating process, and axial movement is eliminated.

The invention discloses a method for obtaining a screw forming grinding sand contour line, which comprises the following steps of: (1) limiting a solution interval of a transcendental equation about a spiral rotation angle in a specific interval, and obtaining all solutions of the transcendental equation in the interval; (2) the change rate of two adjacent solutions is calculated, and the solutions larger than or equal to a set threshold value are removed; and (3) substituting the screened solution into a grinding wheel contour equation to obtain grinding wheel contour discrete points, and adopting a fitting algorithm for an obtained discrete point set to obtain a smooth grinding wheel contour line. According to the method, the solution interval of the transcendental equation is limited in the peak period, close to the original point, of the screw spiral line, the complexity of multiple solutions is reduced, it is guaranteed that the radius of the grinding wheel is small, and machining is more convenient; a reasonable solution is screened out through the change rate, the continuity of the sand contour line is ensured, and the discontinuity is avoided by smoothing points on the sand contour line, so that high-precision machining is realized.

The invention provides a distributed connector framework applied to a parallel winding type superconducting coil and a winding method thereof, the distributed connector framework comprises an upper framework and a lower framework which are oppositely arranged, the lower framework comprises a lower disc and a central column, and the central column is arranged on the lower disc and is in a spiral protrusion shape; a spiral gap exists between the spiral lines of the central column, the inner end of the strip is embedded in the strip groove and is fixedly arranged in a strip track formed by the spiral gap, and the inner side of the superconducting coil is supported by the central column; the upper framework comprises an upper disc and an outer column, the outer column is arranged on the upper disc and is in a circular-ring-shaped protrusion shape, the outer column and the center column are coaxially arranged and located outside the center column, a gap is formed in the outer column and used for leading out the strip outer end of the superconducting strip, and the outer side of the superconducting coil is supported through the outer column. The spiral central column structure is adopted, the contact area between the end strip and the framework is increased based on the spiral central column structure, the joint resistance of the parallel winding type high-temperature superconducting coil can be further reduced, and the heat loss problem of the joint is effectively relieved.

The invention discloses a traction device for an extrusion production line and relates to the technical field of plastic extrusion equipment. The device comprises a left wall plate, a bearing end cover, a deep groove ball bearing, a pull rod, a right wall plate, a left end cover, a right end cover, a reel, a steel wire rope, a pressing plate, a speed reducer and a servo motor, the servo motor is installed and connected with the speed reducer, the left end cover is installed at the driving shaft end of the speed reducer, the two ends of the reel are fixedly connected with the left end cover and the right end cover through screws respectively, a steel wire rope is wound on the reel in a spiral-line-shaped single-layer mode, and one end of the steel wire rope is fixed to the reel through a pressing plate. The left end cover and the right end cover are installed on the left wall plate and the right wall plate through deep groove ball bearings respectively, bearing end covers are installed outside the deep groove ball bearings, and the left wall plate and the right wall plate are connected through a pull rod. Constant-speed traction of the traction guide pipe in the extrusion production process is achieved, it is guaranteed that the pipe produced in the pipe guide stage is a qualified product, the production efficiency is greatly improved, and the pipe rejection rate is reduced.

The invention provides a double-groove structure design method for enhancing the sorting performance of a spiral chute, and relates to the technical field of spiral chute structural design. The double-groove structure design method comprises the steps that S1, the inner diameter and the outer diameter of a first groove and the outer diameter of a second groove are selected; s2, selecting a groove spiral line form as an equiangular spiral line, and selecting equiangular spiral line spiral angles of the first groove and the second groove; s3, selecting the maximum depth and the minimum depth of the groove; s4, an adjacent angle between the first groove and the second groove is selected, and the width of the grooves and the total number of the grooves of the spiral chute are selected; s5, the vertical distance between an outlet of the second groove and an inlet of the first groove is selected; and S6, performance checking is conducted on the designed double-groove structure used for enhancing the sorting performance of the spiral chute, if the performance meets the standard, design is ended, and if the performance does not meet the standard, the steps 1-6 are repeated. Rapid and efficient design of the groove structure can be achieved, and powerful technical support is provided for improving the performance of the spiral chute.

According to the centrifugal pump with the double-spiral blades and the double-roller type granulator using the centrifugal pump, the double-spiral blades are adopted, and the first blade and the second blade influence and balance each other; the contour line of the working surface of the first blade is an Archimedes spiral, and the contour line of the back surface of the second blade is a logarithmic spiral; the contour line of the back face of the first blade comprises a part of a first equal-pitch spiral line close to the inlet side and a part of a first variable-pitch spiral line away from the inlet side, and the contour line of the working face of the second blade comprises a part of a second variable-pitch spiral line close to the inlet side and a part of a second equal-pitch spiral line away from the inlet side. According to the spiral vane pump, the instability of fluid in the spiral vane pump can be optimized, vibration and noise are reduced, the second vane is equivalent to supplement of the first vane, cavitation and cavitation are effectively reduced, and the hydraulic efficiency and the stable performance of the centrifugal pump are improved to a certain degree.

The invention belongs to the technical field of mechatronics, and relates to a four-finger flexible gripper applied to a four-rotor unmanned aerial vehicle. The device is characterized by comprising an electric control part, a soft claw base, a fishing line, fingers and a connecting piece between the electric control part and the base, the electric control part comprises two speed reduction direct current motors, a winch, an electric control assembly, a lithium battery and an upper computer. And four fingers are fixed at four corners below the soft claw base. The base is fixedly connected with the fingers, and the fingers are fixedly connected through screws. Motor racks are fixed to the middle positions of the fingers on the same side above the base, and all the motor racks are connected through screws. Logarithmic spiral lines are benchmarked on the elephant nose and serve as driving lines to be benchmarked on tendons; meanwhile, the state when the tendons are relaxed is used as the initial state of the soft claws, and the effects that the soft claws are folded when the tendons are tensioned and unfolded when the tendons are relaxed are achieved.

A rotary mechanical shaft end fluid pressure adjusting device comprises a circular ring and axial flow guide grooves, the axial flow guide grooves are evenly distributed in the inner surface of the circular ring in the circumferential direction, the groove shapes are logarithmic spiral lines or parabolas or involutes, and the number of the axial flow guide grooves is 30-120. The circular ring is used for being fixed to the inner surface of the stator, and a radial gap is formed between the circular ring and the rotor. According to the invention, the pressure of the flowing fluid at the shaft end can be reduced or increased in the axial direction, the adjusted pressure can further meet the performance requirements of subsequent sealing or other parts, and the function completeness and stability of the whole machine are guaranteed.

The invention relates to the technical field of mold design and manufacturing, and discloses an automatic generation method and device of a shape follow-up waterway and a storage medium, and the method comprises the following steps: S1, generating a bias curved surface; s2, generating an auxiliary spiral line by taking the center of the mold core base as a starting point, and projecting the auxiliary spiral line to the offset curved surface; s3, aiming at the reference trajectory, generating an ordered curve segment set by adopting an ordered curve vector creation algorithm; s4, generating control points for the ordered curve segment set, connecting the control points through a spline curve, and adding a waterway outlet point to form a scanning trajectory; and S5, generating a cooling channel entity along the scanning track line, generating a spiral turbulent flow rib by taking the scanning track line as a ridge line, and combining the spiral turbulent flow rib with the cooling channel through Boolean operation. By introducing an ordered curve vector creation algorithm, a continuous and ordered scanning track line is generated, so that the construction of the shape follow-up waterway is completed, and the automation degree of the design is remarkably improved.

The invention relates to the technical field of separation equipment, and discloses a waste mineral oil impurity removal, separation and recovery system which comprises a rotary drum component, the rotary drum component is composed of a rotary drum large end and a rotary drum small end which are fixedly connected, and an auxiliary deslagging structure is arranged outside a spiral main shaft located at the rotary drum small end. The auxiliary deslagging structure comprises a sleeve arranged on the outer surface of a circular shaft of the spiral main shaft in a sleeving mode, and a sliding groove in sliding connection with the outer wall of the spiral main shaft is formed in the sleeve. An auxiliary deslagging structure is arranged, oil residue particles do spiral motion along the inner wall of the rotary drum component under the combined action of centrifugal force and spiral thrust, meanwhile, radial pulsation is generated due to reciprocating motion of auxiliary blades, a combined track of spiral advancing and radial oscillation is formed, an oil film structure is damaged through dynamic extrusion, leaked oil is recovered through centrifugal suction, and the oil residue removal effect is improved. And through the synergistic effect of variable-volume extrusion and filtering gaps, oil wrapping is reduced, the oil stripping effect is enhanced, oil residue residues are reduced, and channel blockage is avoided.

The utility model provides an automatic cleaning device for the outer surface of a finished tobacco shred box, which comprises at least one cleaning unit, each cleaning unit comprises two cleaning supports arranged on two sides of a conveying channel of the finished tobacco shred box, and the two cleaning supports are respectively and rotatably provided with a vertically extending cleaning roller. The two cleaning rollers are driven by the driving mechanism to rotate, and the rotating directions of the two cleaning rollers are opposite; a plurality of brushes are arranged on the outer roller surface of each cleaning roller, and the distribution form of the plurality of brushes on the outer roller surface of the cleaning roller is as follows: a plurality of groups of brush assemblies are distributed along the circumferential direction of the outer roller surface of the cleaning roller, and each group of brush assembly comprises a plurality of brushes; the arrangement track line of the multiple brushes of each brush assembly is a cylindrical spiral line track line based on the central axis of the cleaning roller, and the multiple brushes of each brush assembly are distributed on the corresponding cylindrical spiral line track line at equal intervals. Compared with the prior art, the cleaning device has the advantage that the outer surface of the finished tobacco shred box is effectively cleaned.

The anti-rotation flow guide integrated radial seal comprises an anti-rotation flow guide structure and a plurality of sealing teeth, the anti-rotation flow guide structure and the sealing teeth are sequentially arranged on the inner surface of a sealing stator in the flowing direction, the anti-rotation flow guide structure is installed at an inlet of the sealing stator, high-speed circumferential rotational flow caused by pre-rotation of an air inlet can be weakened, and the anti-rotation flow guide effect is improved. And the pressure distribution between the air inlet and the adjacent sealing teeth of the anti-rotation flow guide structure can be changed, so that the excitation is reduced, and the leakage rate is reduced. Wherein the spiral line type anti-rotation flow guide structure is composed of a plurality of spiral flow guide plates distributed in the circumferential direction, a millimeter-level spiral deep groove area is designed at an inlet, the flow pattern of airflow is changed through the hydrostatic pressure effect, the circumferential rotational flow velocity of the surface of the rotor is reduced, and the kinetic energy dissipation of the airflow is increased. Or the spiral line type anti-rotation flow guide structure is a boss with a spiral flow guide groove, a reasonable groove type structure is designed according to the rotation direction of the rotor and the working condition so as to change the pressure distribution of the airflow, and the throttling and flow guide effects are achieved.

The invention provides a tree-climbing pruning robot. The tree-climbing pruning robot comprises a rack, a tree-climbing mechanism and a pruning mechanism, wherein the tree-climbing mechanism and the pruning mechanism are arranged on the rack; the tree climbing mechanism comprises a climbing frame, and a crawler motor and three groups of climbing crawlers which are arranged on the climbing frame; all the climbing tracks are obliquely arranged, and the three sets of climbing tracks are located on the same spiral line; the driving track is in transmission connection with the output end of the climbing motor; the climbing crawler belt comprises two groups of crawler wheels which are symmetrically arranged and an annular crawler belt which is wound on the two groups of crawler wheels; the crawler wheel closest to the center of the climbing frame in each set of crawler wheels is a movable wheel, the other crawler wheels are fixed wheels, the fixed wheels are rotationally connected with a fixed frame, the fixed frame is fixedly connected with the climbing frame, the movable wheels are rotationally connected with a supporting plate, and a mounting base is arranged on the side portion of the supporting plate and connected with the climbing frame through a telescopic mechanism. The tree-climbing pruning robot is provided with three groups of climbing crawlers which can spirally move up and down along a tree, and the climbing crawlers can be adjusted for adaptation when encountering bulges.

The invention provides a logarithmic spiral motor design method, belongs to the technical field of spiral motor design, and designs logarithmic spiral electromagnetic topology, fuses a plurality of materials, constructs an integrated structure body, and sets an intelligent regulation and dynamic matching control mode. Firstly, a magnetic flux path is optimized, magnetic flux is naturally distributed in the tangential direction of a spiral line by utilizing the characteristic that the curvature of the spiral line is continuously increased or decreased, edge magnetic flux distortion is reduced, then near-field coupling is enhanced, and the magnetic flux superposition phase difference between adjacent spiral units is controlled by adjusting spiral line parameters. The double targets of active enhancement of effective magnetic flux and suppression of magnetic leakage are achieved. Through deep fusion of geometric characteristics and electromagnetic laws of logarithmic spiral lines, pole slot limitation and loss bottlenecks of a traditional motor are broken through, through a logarithmic spiral line electromagnetic topology design normal form, geometric curvature and magnetic field distribution are quantitatively associated, and through a conductive, magnetic conductive and heat dissipation composite winding and an intelligent magnetic barrier structure, multi-field collaborative optimization is achieved.

A follow-up speed-increasing push, press, and throw integrated inter-row straw cleaning device suitable for no-till seeding units is mainly composed of a connecting frame, a straw pushing disc, a pressure and throwing disc, and a planetary gear transmission system. The straw pushing disc rotates around the center under the combined action of the device's own gravity and soil resistance, and the pressure and throwing disc is driven by the planetary gear transmission system to increase the speed of rotation. When the device moves forward at a fast speed, straw accumulates on the surface of the straw pushing disc. When the straw accumulates to the sweeping height of the pressure and throwing disc, the pressure and throwing teeth of the pressure and throwing disc press the accumulated straw and then throw it to the side and rear. The tooth profile curve of the pressure and throwing teeth is a combination curve of the Archimedean spiral and the Cartesian leaf line, which can realize the process of first pressing and then throwing the accumulated straw. The combined curve pressure and throwing teeth are straw sliding cutting and throwing rather than picking and throwing. On the one hand, it prevents the accumulated straw from crossing the straw pushing disc to cause blockage. At the same time, it ensures that the side-thrown straw has a low initial throwing velocity to avoid straw throwing to the adjacent sowing interval.

The utility model belongs to the technical field of spiral lines, and particularly discloses a spiral line with anti-loosening joint contacts, which comprises a spiral line body, one end of the spiral line body is provided with a connector, one end of each of the two connectors is provided with a connecting contact, and the outer wall of each connecting contact is provided with an anti-bending assembly. The number of the anti-bending assemblies is two, each anti-bending assembly comprises a protective shell, the protective shells are used for preventing the spiral line body from being bent, the number of the protective shells is two, one end of each protective shell is fixedly connected with an L-shaped rod, one end of each L-shaped rod is connected with a semicircular ring, and the two ends of each semicircular ring are provided with connecting plates. According to the utility model, through the arrangement of the anti-bending assembly, the bending of the spiral line is effectively prevented, the connection stability is ensured, and the connection contact is not subjected to extra stress due to the bending of the spiral line, so that the probability of occurrence of the problems of poor contact, signal interruption and the like is reduced, and the probability of breakage of the spiral line is also reduced.

The invention relates to a light-weight type planetary line gear reducer which comprises a sun gear, a planetary gear, an inner gear ring and a planetary carrier which are all light-weight type line gears, the sun gear is located in the center of the inner gear ring, the sun gear and the planetary carrier are both coaxially and rotationally installed on the inner gear ring, and the planetary gear is installed on the planetary carrier in a heteroaxial rotation mode and can rotate around the axis of the planetary gear. And the tooth surface normal of any contact point of the planet gear is collinear with the tooth surface normal of the corresponding contact point of the sun gear and the inner gear ring at the same time, the contact line is a cylindrical spiral line, and the transmission ratio and the spiral radius are decoupled. Through the space curve meshing theory, the reduction ratio exceeding 30 can be achieved through a single stage, the stage number of the planetary reducer is reduced, the force flow transmission path is remarkably shortened, the overall weight is reduced, and meanwhile the bearing capacity and reliability are improved; the technical problems that in the prior art, when the large reduction ratio is achieved, the multi-stage series connection structure is complex, the weight is increased, the transmission and positioning precision is reduced, and the load dispersing capacity is limited are systematically solved.

The utility model discloses a device for measuring a tooth profile curve, a spiral line and a surface gluing area of a gear, and relates to the technical field of gear measurement. The device for measuring the tooth profile curve and / or the spiral line of the gear comprises a measuring frame (2), a probe (7) is arranged on the measuring frame (2), a rotary table (4) is arranged on one side of the probe (7), and a measured gear (9) is installed on the rotary table (4); wherein the rotary table (4) is used for driving the measured gear (9) to rotate, and the measuring pin (7) is used for measuring a gear tooth profile curve and / or a spiral line corresponding to the measured gear (9). The problems that an existing measurement method is low in precision, difficult to judge, poor in repeatability, long in measurement period and the like are solved.

The embodiment of the invention provides rocker arm type adjustable ship charging equipment, and relates to the technical field of energy supply device manufacturing. The rocker arm type adjustable ship charging equipment comprises a base, a sliding rail, a rocker arm assembly and a winding mechanism. One end of the screw rod is driven by a stepping motor to rotate; the lower end of the main shaft is rotationally connected with the base, a servo motor used for driving the supporting arm to rotate around the upper end of the main shaft is installed on the main shaft, and a forward and reverse rotation motor used for driving the main shaft to rotate is installed in the base; the winding wheel is rotationally installed at the rear end of the sliding rail, and the take-up and pay-off driving unit is used for driving the winding wheel to rotate. Position deviation is monitored in real time through an installed sensor, a fine adjustment mechanism is automatically triggered, and the stability of charging butt joint is ensured; the winding wheel adopts a spiral line groove design and is matched with a guide mechanism to realize ordered arrangement of cables, so that the common problems of disordered wires and overlapped wires of a traditional winding device are solved, and the manual arrangement and maintenance cost is reduced.

The invention belongs to the technical field of quartz tube polishing, and particularly relates to high-transmittance quartz tube surface precision plasma polishing equipment which comprises a machine body, and a rack is fixedly connected to the machine body; the moving mechanism is arranged on the machine body, the moving mechanism comprises two sliding shells installed on the machine body in a sliding mode, the sliding shells are in transmission connection with the racks, and a plurality of clamping blocks are rotationally installed on the sliding shells; and the polishing assembly comprises a frame body installed on the machine body in a sliding mode, the frame body is in transmission connection with the rack, and a plurality of spray guns are installed on the frame body in a sliding mode. According to the quartz tube polishing device, the two ends of a quartz tube can be clamped through the two sliding shells correspondingly, the two ends of the quartz tube can be polished conveniently, the moving track of the spray gun relative to the quartz tube can be a spiral line through the moving mechanism and the polishing assembly, the spray gun is matched with quartz tubes of different diameter sizes after sliding, and polishing convenience is improved.

The invention relates to a wind wheel with canvas blades and a wind turbine with the device. The wind wheel comprises a hub, canvas blades and a main shaft. The hub comprises a hub circular ring, a hub inner rod, a hub outer beam and a spiral beam. The truss structure of the hub is rotationally symmetrical relative to the main shaft; the outer side end point of the hub inner rod is fixedly connected to the edge of the hub circular ring, and the inner side end point of the hub inner rod is fixedly connected to the first connecting area of the main shaft. The outer side end point of the hub outer beam is fixedly connected to the edge of the hub circular ring, and the inner side end point of the hub outer beam is fixedly connected to the second connecting area of the main shaft. The spiral beam is fixedly connected to the hub outer beam along the hub rotating curved surface in a spiral line shape; the outer side edges of the canvas blades are connected to the spiral beams, and the inner side edges of the canvas blades are connected to the main shaft. In some embodiments, the wind wheel has the sail folding function, and the canvas blades can be folded in typhoon weather. The wheel hub forms a truss structure, so that the wheel hub not only can effectively support the canvas blades, but also has higher structural strength and lighter mass. The canvas blades of the wind wheel are in the shape of the blades of a rose-shaped wind turbine. The wind wheel has the technical advantages of being high in wind energy utilization rate, low in noise, low in cost and environmentally friendly.

The invention discloses a single-tower cable-stayed urban viaduct and a construction method, and belongs to the technical field of viaducts. The viaduct comprises a single-column bridge tower provided with an inhaul cable anchoring area; the stay cable is arranged in a central double-cable-plane fan shape, the stay cable comprises a core part and an outer wrapping layer, the outer surface of the outer wrapping layer is provided with a spiral line and is provided with circular pits, the pits avoid the spiral line, and the pits at least comprise two types of pits with different diameters; the other ends of the stay cables are connected with the main beam in an anchoring mode, the main beam is a single-box five-chamber prestressed concrete box beam, a cross beam is arranged on the mid-span section at a preset interval, and the distance between the cross beams is the same as that between the stay cables. The technical problem that the galloping amplitude of a dry cable of an existing stay cable is large is solved.

The invention provides a ball screw contact load extraction method, which comprises the following steps of: firstly determining the position of a first steel ball, then establishing a spiral line equation at the center of the steel ball of a screw so as to determine the coordinates of other steel balls, and then establishing a reference point at the determined coordinates for placing the steel ball, and finally, establishing a finite element model of the ball screw, defining a contact pair, an applied load and a boundary condition according to an actual contact relationship among parts, and extracting a contact load of a ball screw raceway and a steel ball in post-processing.