483 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 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 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 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.

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 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 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 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.

The invention discloses a processing method for improving the cutting efficiency of a water-guided laser thick plate material, which comprises the following steps: in the initial cutting stage, establishing an initial drainage channel with the outer vertical surface of the thick plate material through a lead or a spiral line drill hole; after the initial channel is established, the thick plate material is cut along the cutting channel with the initial drainage channel as the starting point, and a target cutting workpiece is obtained; wherein in the process of cutting along the cutting channel, a feed type reciprocating cutting mode and / or a swing cutting scanning strategy are / is adopted for penetrating type cutting. On the basis, the stability of the water jet and the continuity of the total reflection condition in the cutting process are guaranteed to the maximum extent, and therefore the cutting efficiency can be greatly improved.

The invention relates to a variable-width volute spiral spring design method and a volute spiral spring, and belongs to the technical field of volute spiral springs.The variable-width volute spiral spring design method comprises the steps that S1, polar angles corresponding to plane spiral lines at different arc length positions are determined; s2, determining curvature radiuses corresponding to the planar spiral lines at different polar angle positions; s3, according to different curvature radius parts, the initial section width of the volute spiral spring is designed; and S4, the initial width of the volute spiral spring is adjusted according to the ratio of the radius to the half thickness of different parts, and uniform distribution of bending stress is achieved. The core of the method is that a corresponding width change rule is designed according to a change rule of bending stress along with curvature radius disclosed by a curved beam theory. By means of the method, the maximum bending stress of all the sections can be equal, and therefore the bearing capacity and stability of the volute spiral spring are improved.

The invention discloses a polishing device for batch machining of automobile bearings, and particularly relates to the technical field of automobile workpiece grinding, the polishing device comprises a polishing frame and a polishing abrasive belt, a dust collector is installed on the side, close to the polishing abrasive belt, of the polishing frame, and a stable polishing assembly is arranged between the polishing frame and the polishing abrasive belt; the stable grinding assembly is used for keeping a spiral propelling type grinding track between the workpiece and the grinding abrasive belt; the stable grinding assembly comprises a driving guide wheel disc and a driven guide wheel disc which are movably connected to the side, close to the grinding abrasive belt, of the grinding frame. Workpieces in the two clamping blocks are driven to perform pure rotary motion through rotation of the driving guide wheel disc, the inclined grinding abrasive belt represents a fixed fixed inclined plane, and then when any point on the surface of a bearing makes contact with the grinding abrasive belt, the motion trail of the grinding abrasive belt is not a simple circumferential line any more, so that the grinding effect is good. The spiral line is formed by combining the tangential motion of rotation and the axial sliding component caused by the inclination angle.

The utility model discloses a film evaporator for processing high-viscosity materials, which comprises a barrel body extending along the vertical direction, a heating jacket arranged on the periphery of the barrel body, a feed port connected to the side wall of the upper part of the barrel body, a conical discharge barrel with a big upper part and a small lower part connected to the lower end of the barrel body, and a rotor arranged in an inner cavity of the barrel body and used for scraping the inner wall of the inner cavity of the barrel body, a rotor shaft is arranged along the axis of the rotor, a plurality of scraping blades are uniformly arranged on the periphery of the rotor shaft in a central symmetry manner, each scraping blade extends along a spiral line which is guided downwards, and the outer edge of each scraping blade is close to the inner wall of the barrel body; and a conical discharging paddle for pushing materials downwards is arranged on the periphery of the lower part of the rotor shaft, is positioned in an inner cavity of the conical discharging barrel and is matched with the inner cavity of the conical discharging barrel. According to the film evaporator, a liquid film can be uniformly spread and smoothly flows downwards, the evaporation efficiency is high, materials are prevented from being overheated or blocked, and long-term stable operation of equipment is guaranteed.

The invention provides a laser welding method, structure and device. The laser welding method comprises the steps that a first laser beam and a second laser beam in double-layer laser beams are controlled to irradiate a first welding face of a stacked part at the same time; controlling the target moving object to move along the first double-layer spiral track; the first double-layer spiral track comprises a first spiral line and a second spiral line which rotate around a preset welding spot and are parallel to each other; the target moving object is at least one of a double-layer laser beam and a stack; the second spiral line comprises a first track section, the last circle of the first track section is located on the outer side of the last circle of the first spiral line, and the laser power of the first laser beam is larger than that of the second laser beam. The welding quality and the welding stability are guaranteed, and the welding spot strength is improved.

The invention relates to the technical field of automobile parts, in particular to a same-direction transmission line gear pair and a differential mechanism, which comprise a driving line gear and a driven line gear, contact lines of the driving line gear and the driven line gear are meshed according to a space conjugate curve, the driving line gear and the driven line gear have the same movement direction, and the driving line gear and the driven line gear are meshed according to a space conjugate curve. The contact lines of the driving line gear and the driven line gear are cylindrical spiral lines, and the spiral directions of the cylindrical spiral lines are the same. Linear gear transmission is adopted, external meshing and homodromous transmission can be achieved without adding an idle gear, the machining cost is reduced, the structure is compact, and assembling is convenient.

The invention discloses a double-spiral type acoustic black hole vibration reduction structure which comprises two spiral line acoustic black holes, a transverse connecting rod and a damping layer. The spiral acoustic black hole comprises a plurality of conical units. And the thickness of each conical unit is gradually reduced by a power function in the direction from the head end to the tail end. The damping layer is arranged on the inner surface of the conical unit. Any two adjacent conical units are smoothly connected in a head end-head end or tail end-tail end mode, and the spiral line acoustic black hole with the periodically-variable diameter is constructed. And the spiral line acoustic black hole spirally extends around the central shaft. The two spiral line acoustic black holes have the same screw pitch and spiral radius, the center axes of the two spiral line acoustic black holes coincide, and the two spiral line acoustic black holes are arranged in a staggered mode along the center axes to form a parallel coiled double-spiral structure. And the plurality of transverse connecting rods are arranged on the central shaft at intervals so as to transversely connect the two spiral line acoustic black holes. According to the vibration reduction structure, the wave velocity regulation and control mechanism of the acoustic black hole and the band gap characteristic of the periodic structure are fused, and the more efficient and stable vibration reduction performance is achieved for multi-dimensional vibration.

The utility model discloses a dustproof strip feeding vibration disc, and belongs to the field of vibration discs. The dustproof strip feeding vibration disc comprises a main body, a feeding surface which is distributed along a spiral line is arranged in the main body; the feeding surface extends from bottom to top; the inner wall of the main body is provided with a layered baffle plate for forcing the dustproof strip to be in a single layer, a guide rod for forcing the dustproof strip to be in a vertical state, and a sifter; the screening device comprises a dumping groove and a limiting groove located below the dumping groove. The limiting groove is used for containing a protrusion on the dustproof strip. According to the scheme, during working, through cooperation of the guide rod, the screening device and the push rod, the dust-proof strip can be in the forward direction finally no matter what orientation the dust-proof strip is initially in. And in addition, in the vibration feeding process, the dustproof strips behind the layered baffle are not removed, and the dustproof strip output efficiency is guaranteed.

The utility model discloses a blade type spiral flow spiral flow generator based on a bionic non-smooth surface. The blade type spiral flow spiral flow generator is divided into a mandrel part and a front cone part. The main body of the core shaft part is a core shaft, the core shaft is a solid cylinder, a plurality of spiral blades are arranged on the excircle surface of the core shaft in parallel, a plurality of grooves are distributed in each spiral blade side by side in the radial direction, and all the grooves face the front cone direction; the main body of the front cone part is called a front cone section, and a plurality of ribs are longitudinally arranged on the conical surface of the front cone section. The utility model belongs to the technical field of fluid machinery, and solves the problems of low fluid conveying efficiency and lower material mixing property caused by unsatisfactory structure arrangement of a spiral flow spiral flow generator in the prior art, and the grooves not only increase the contact surface between the blades and the materials, promote the full mixing of the materials, but also enhance the stirring uniformity and efficiency; in addition, the shape and arrangement of the grooves ingeniously guide the materials to flow in the spiral line direction, the conveying resistance is reduced, and the overall conveying performance is improved.

The invention discloses a double-tool-bit groove edge milling machine and relates to the technical field of steel plate groove milling. The double-tool-bit groove edge milling machine comprises a transmission box, a positioning shaft and a swing shaft, the axis of the positioning shaft and a rack are kept static relatively, the rotating axis of a first milling tool bit coincides with the axis of the positioning shaft, and the rotating axis of a second milling tool bit coincides with the axis of the swing shaft; the rotating axis of the second milling tool bit coincides with the axis of the positioning shaft. The hydraulic rod stretches out and draws back to drive the swing shaft to swing around the axis of the positioning shaft. The extending direction of the arc-shaped sliding rail is a spiral line, and the axis of the spiral line coincides with the axis of the positioning shaft. The milling tool bit has the beneficial effects that the two milling tool bits II are designed to mill a groove of a workpiece; the groove of the workpiece is milled through the first milling tool bit, and the groove of the workpiece is covered with the first milling tool bit and the second milling tool bit; the milling depth of the single tool in the double tool bits is halved, the heat productivity is reduced, and the cutting efficiency is improved; free and fast switching between a slope opening and a V-shaped groove is achieved, the working process is simplified, and the turn-over process is omitted.