51 results about "Archimedean spiral" patented technology

The invention discloses a cylindrical battery design method based on an Archimedes spiral formula, which comprises the following steps of: calculating the number of winding turns of a positive electrode, a negative electrode and two layers of diaphragms at one time through the Archimedes spiral formula; and establishing a relation curve of the number of winding turns, the winding radiuses and the winding curves xy of the four groups of assemblies on the battery simulation diagram, obtaining xy coordinate values of the corresponding winding curves of the four groups of assemblies, and completing the winding design of the cylindrical battery. After the positive electrode, the negative electrode and the diaphragm are wound, the diameter of the winding core is certainly and completely consistent with the preset diameter, and the situation that the winding core cannot enter a shell is avoided. Moreover, the method can directly simulate the cross section condition of the wound roll core in an excl table, can more visually judge the diameter of the wound roll core, the wrapping condition of a negative electrode to a positive electrode and other information, and provides great convenience for the design of the roll core.

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 present invention discloses an annular spiral acoustic black hole vibration damping structure, which relates to the technical field of vibration damping and noise reduction. The structure includes a central ring made of a high-temperature resistant material, a plurality of Archimedean spiral acoustic black holes, and an annular belt. The central ring is sleeved on the surface of the tubular structure to be vibration-damped. Each Archimedean spiral acoustic black hole is formed by curling the end of a one-dimensional acoustic black hole in the form of an Archimedean spiral around the tubular structure to be vibration-damped. The first ends of the one-dimensional acoustic black holes are all fixed on the surface of the tubular structure to be vibration-damped through the central ring, and the first ends of the one-dimensional acoustic black holes are evenly arranged in the circumferential direction of the tubular structure to be vibration-damped in the central ring. The thickness of the one-dimensional acoustic black hole decreases exponentially from the first end of the one-dimensional acoustic black hole to the end of the one-dimensional acoustic black hole. The damping annular belt adheres to the outermost contour of the Archimedean spiral acoustic black hole, and each annular belt together constitutes the outermost contour of the vibration damping structure. The present invention is applicable to the vibration damping and noise reduction of tubular structures, and is lightweight and high-temperature resistant.

The invention relates to the technical field of aero-engine state monitoring, and discloses an aero-engine blade tip gap measuring probe and system based on an eddy current method.The aero-engine blade tip gap measuring probe adopts a coplanar Archimedes spiral double-coil array, and in the measuring process, the blade tip gap can be measured by applying anti-phase excitation; the common-mode noise suppression in the blade tip clearance measurement process is realized by combining a differential amplification circuit; signal extraction and temperature drift compensation are realized through a phase-locked amplification technology and an impedance-resistance orthogonal decoupling architecture, and finally micron-order gap analysis is realized. The aero-engine blade tip clearance measurement system provided by the invention can still keep excellent reliability under extreme working conditions of high temperature, high rotating speed and the like of a turbine, and meanwhile, the measurement precision of the blade tip clearance can be remarkably improved.

The present invention discloses an automated cutting device for plate production, which relates to the technical field of plate production, and comprises an inner frame, wherein the front and rear ends of the inner frame are respectively fixed with a front frame and a rear frame; a roller conveyor is fixedly installed in the rear frame; a shearing mechanism for shearing is provided in the front frame; a walking structure for enabling the shearing mechanism to move linearly therein is provided in the front frame; and rotating holes are provided on both sides of the rear frame above the roller conveyor. The disc provided in the present invention enables the shearing mechanism to move back and forth linearly. The disc is designed based on an Archimedean spiral. During the process of the disc pushing the shearing mechanism, there is a distance that is consistent with the direction of plate conveying and at the same speed. The shearing mechanism completes the cutting work in the uniform speed section, then resets, and reciprocates in sequence, thereby realizing continuous cutting motion, ensuring that the feeding process does not stop, so that feeding and shearing work are carried out simultaneously, thereby improving production efficiency.

The application discloses a kind of based on Archimedes spiral measurement roll bending tool of rotation angle, including base, multiple roll bending units and rotation correction unit;Rotation correction unit includes fixed seat, rotating wheel, measuring block and guide pin;The fixed seat and base fixed connection, rotating wheel is rotatably connected with fixed seat, measuring block is fixedly connected on rotating wheel, and measuring block is equipped with spiral groove, and Archimedes spiral coincides with the spiral groove path and the rotation axis of the same point and rotating wheel coincides;The application is according to Archimedes spiral principle, only needs to be converted into the rotation angle of rotating wheel by digital display range finder instrument determination guide pin displacement distance, and this angle is also the rotation angle of workpiece roll bending by the roll bending unit fixedly connected with rotating wheel, clever structure, without additional use specific mechanical measurement rotation angle after adjusting angle each time, greatly improve work efficiency, and measurement precision is high, guarantee the adjustment accuracy, effectively improve product quality.

The invention discloses a robot speed control method and device based on single-target planning, and relates to the technical field of robot control. Robot motion control basic parameters are obtained, and the constant advancing speed of the first robot serves as a decision variable; wherein the robot motion control basic parameters comprise structural parameters, path geometric features, kinematics parameters and a speed safety threshold value of the robot, the robot path adopts an Archimedes spiral, and the U-turn path is planned into two sections of tangent arcs; constructing a target function by taking maximization of the decision variable as a target; setting constraint conditions based on robot motion control basic parameters; constructing a single-target constraint optimization model by combining the target function, the constraint condition and a robot speed calculation model; the single-target constraint optimization model is solved, and the maximum speed of the robot in the U-turn area is calculated through simulation. The problem of how to control the performance speed of the robot and guarantee the safety of the performance process of the robot is solved.

The invention belongs to the technical field of static mixers, and provides an Archimedes spiral-based static mixer jet structure and a working method thereof, the Archimedes spiral-based static mixer jet structure comprises a shell, and a spiral jet branch pipe and a mixing element arranged in the shell; each spiral injection branch pipe comprises an air inlet pipe, a spiral pipe connected with the air inlet pipe and a plurality of air outlet pipes arranged on the spiral pipe; the spiral pipe is of an Archimedes spiral structure, the air inlet pipe penetrates through the shell, the spiral pipe is located in the shell, and an air outlet of the air outlet pipe faces the mixing element. The multi-path hydrogen nozzles arranged in the Archimedes spiral are combined with the mixing element, so that the hydrogen can be uniformly dispersed and sprayed in a three-dimensional space, the mixing uniformity of the hydrogen and natural gas is effectively improved, the hydrogen is prevented from being enriched along the pipe wall due to density difference or the local concentration is prevented from being too high, and the material degradation and leakage risk caused by hydrogen embrittlement is remarkably reduced.

The invention provides a measuring device for alloy fluidity in a concentric three-spiral-line thin-wall casting, a using method and a predicting method, and belongs to the field of liquid metal fluidity testing. The method is used for solving the problems that in the prior art, the flowing property and the mold filling property of liquid metal in the thin-wall casting pouring process cannot be accurately measured, and the actual mold filling condition of the thin-wall casting cannot be synchronized through flowing property testing. The device comprises a concentric triple-helix pattern, a sprue pattern, an outer sprue pattern, a lower sand box, an upper sand box and an outer sprue sand box, the upper sand box is mounted on the lower sand box, the concentric triple-helix pattern is mounted in the lower sand box, the outer sprue sand box is mounted on the upper sand box, the sprue pattern is mounted in the upper sand box, and the outer sprue pattern is mounted in the outer sprue sand box. The outer sprue pattern is mounted in the outer sprue sand box, the sprue pattern is connected with the outer sprue pattern, and the concentric triple-helix pattern is expanded in the radial direction of the sprue pattern in the Archimedes spiral direction. The device is mainly used for testing liquid metal fluidity.

The invention discloses self-dispersing anti-blocking single-shaft compression equipment which comprises a machine shell, a compression roller, an extrusion plate and a driving device, and the compression roller is rotationally installed in the machine shell and comprises a first rotating shaft and a plurality of compression cutter tooth discs fixedly installed on the first rotating shaft at intervals; a plurality of cutter teeth are annularly arranged on the periphery of each compression cutter fluted disc at equal intervals, the compression cutter fluted discs are distributed into two symmetrical groups, and the corresponding cutter teeth on each compression cutter fluted disc in each group are distributed along an Archimedes spiral; the extrusion plate is rotationally installed in the machine shell and obliquely arranged on one side of the compression roller, the driving device is in transmission connection with the compression roller and the extrusion plate, and the driving device is used for driving the compression roller to rotate so as to be matched with the extrusion plate to compress the hollow bottle body and is also used for driving the extrusion plate to do reciprocating swing motion relative to the compression roller. According to the self-dispersing device, the occlusal force and the grabbing force on the bottle bodies can be improved, self-dispersing of the fed bottle bodies is achieved, accumulation and material blocking are avoided, and the self-dispersing device can be matched with compression treatment of large-size bottle bodies.

The invention provides a laser welding method and laser welding equipment for plates. The method comprises the steps that a welding unit is controlled to conduct laser welding along a first track; the first track is roughly in an Archimedes spiral shape; the starting point of the first track deviates from the center of the first track; the curvature radius of the starting point of the first track is larger than the spot radius of the laser. The laser welding method and the laser welding equipment for the plate can reduce the continuous staying time of the laser in the center position of the first track, and reduce the risk that the plate is welded through.

The invention discloses a torque measuring device and method based on Archimedes spiral corner displacement conversion. The device comprises an elastic shaft, a first displacement sensor and a second displacement sensor, and a first measuring gear and a second measuring gear which are of an integrated structure with the elastic shaft are arranged on the outer side of the elastic shaft. The two displacement sensors are respectively arranged right below the two measuring gears; carrying out a calibration experiment on the relation between the angular displacement at each measurement gear and the output quantity of the corresponding displacement sensor; calibration experiment results are processed to obtain proportionality coefficients of the two measuring gears and extreme values of output quantities of the two displacement sensors; the output quantities of the two displacement sensors in the torque loading process are collected in real time; actual measurement data is processed to obtain angular displacement variation before and after torque loading at the two measuring gears, the difference value of the two angular displacement variation is the relative torsion angle of the two ends of the elastic shaft, and the torque of the rotating shaft to be measured is calculated. The method is suitable for dynamic torque monitoring of a rotating mechanical system.

This invention discloses a valve positioner motion conversion mechanism and an intelligent valve positioner. The valve positioner motion conversion mechanism includes a valve stem that drives the valve to open and close via up-and-down movement. A lever is disposed on the side of the valve stem, and the lever has a bearing fixed to an input shaft. A curved groove is provided in the lever, in which a lever can move. The shape of the curved groove is determined by a constant-velocity Archimedean spiral, the polar equation of which is: r = a + bθ, where: r represents the polar radius; a represents the distance from the starting point of the spiral to the center of rotation; θ represents the polar angle; and b is the increase in distance of r after each certain angle θ. The intelligent valve positioner includes a positioner housing, a potentiometer and a potentiometer gear extending from the potentiometer, an input gear, and an input shaft. It also includes a valve positioner motion conversion mechanism connecting the lever to the input shaft of the valve positioner. The structure is simple and the operation is stable.

The application discloses a cylindrical battery design method based on an Archimedes spiral formula, which completes the calculation of the winding number of the positive electrode, the negative electrode and two layers of the separator by the Archimedes spiral equation, then carries out winding simulation on the four groups of components respectively, establishes the relationship curve of the winding number, the winding radius and the winding curve xy of the four groups of components on the battery simulation diagram, obtains the xy coordinate values of the corresponding winding curve of the four groups of components, and completes the winding design of the cylindrical battery. The application guarantees that the diameter of the winding core is completely consistent with the preset diameter after the winding of the positive electrode, the negative electrode and the separator is completed, and the winding core cannot enter the shell. Moreover, the method can simulate the cross-section condition of the winding core after winding in the execl table directly, can more intuitively judge the diameter of the winding core, the wrapping condition of the negative electrode to the positive electrode and other information, and provides great convenience for the design of the winding core.

The variable stiffness compliant gripping device based on the Archimedean spiral principle belongs to the field of mechanical structure design. Existing flexible grippers are unable to grip heavy objects, while flexible grippers with control technology have low operating efficiency and are sensitive to the working environment. A DC motor drives the top-level clamping jaw assembly located on the clamping jaw base to open or close through a driving mechanism; after each upper swing arm is buckled with a lower swing arm, each is connected to a spring mounting frame through a spring to form a swing arm assembly. The lower swing arms in the two swing arm assemblies always remain parallel and are installed in opposite directions. The head ends of the two lower swing arms are rotatably connected to the surface of the drive disk, and the two spring mounting frames are both fixed to the surface of the drive disk; the transmission rocker is a T-bar, and the two ends of the horizontal bar of the T-bar are connected to a slider, each slider slides in the grooves in the upper and lower swing arms, and the vertical bar of the T-bar extends out of the drive disk and is fixedly connected to the top left clamping jaw arm. The present invention is used for compliant gripping of objects.

The present invention relates to the field of flange technology, and proposes a flange that is easy to install and an installation method, wherein the flange that is easy to install includes a flange plate body, a rotating plate and an adjusting plate. An annular groove is provided on one side of the flange plate body, and the adjusting plate is installed in the annular groove through a detachable structure, and an Archimedean spiral groove is provided on its end face. A plurality of radially sliding positioning claws are provided in the circular through hole, and the positioning claws are engaged with the spiral groove to achieve synchronous movement through teeth. During installation, the rotating adjusting plate drives the positioning claws to press against the inner wall of the pipe, and the flange is welded and fixed after self-centering. The rotating plate cooperates with the annular groove through a guide block to adjust the angle of the bolt hole. The present invention solves the problems of inaccurate installation alignment, cumbersome centering steps, strong dependence on the experience of construction personnel, poor sealing and low efficiency of traditional flanges through multi-claw synchronous positioning, dynamic sealing compensation and modular design, and significantly improves the installation accuracy, anti-leakage performance and construction efficiency.

The present invention relates to an elastic element of a robotic series elastic actuator, specifically a bidirectional multi-branch planar scroll torsion spring, which is installed by stacking two torsion spring elastic bodies with opposite helix directions; each torsion spring elastic body has a plurality of elastic body branches with the same helix direction, in the shape of an Archimedean spiral, and deformable. The elastic body branches are evenly arranged circumferentially clockwise or counterclockwise around the rotation center of the torsion spring. There is a gap as the deformation space of the torsion spring elastic body between adjacent two elastic body branches in the no-load state; a single elastic body has the problem of insufficient load-bearing capacity in both positive and negative directions under the action of torque. The method of pre-tightening and installing two torsion spring elastic bodies with different helix directions can enable the torsion spring to have a large load-bearing capacity in both positive and negative directions. The structure of the present invention is compact and has good mechanical properties. It can be used as an elastic element of a robotic flexible joint, and is particularly suitable as an elastic element of a rotary series elastic actuator.

The utility model relates to a kind of corrosion resistant pump, belong to centrifugal pump technical field.The corrosion resistant pump includes front part pressurizing volute and rear volute, front part pressurizing volute includes pressure line, throat pipe, diffusion pipe and discharge pipe connected in turn, pressure line is vertically arranged, throat pipe and diffusion pipe jointly constitute Archimedes spiral line pipe, discharge pipe includes elbow and horizontal straight pipe, discharge pipe is communicated with the inlet of rear volute, the inside of pressure line is provided with nozzle, nozzle is communicated with the outlet of rear volute by reflux pipe, corrosion resistant pump further includes impeller, pump cover and suspension, pump cover and rear volute form a complete cavity, impeller is installed in cavity, and impeller is connected with the pump shaft of suspension.The corrosion resistant pump is small in pump body volume, saves space, can promote impeller inlet pressure, prevent medium from vaporizing in the process of suction due to pump inlet pressure being negative pressure, cause pump to produce cavitation, reduce the service life of pump.

An elastic pressing type full-automatic tension compensator for an electrified railway mainly comprises an anchor column stay wire, an anchor column, a wheel carrier, a pawl, a spiral multifunctional wheel, a steel wire rope, an insulator, an upper end connector, an actuating rod, a wire, a nut, a hoop, a spring outer cylinder, an outer spring, an inner spring, a spring inner cylinder, an inner spring pulling plate, an outer spring pulling plate, a spring cylinder lug and a mounting base. The relation between deformation of an elastic object and acting force, the Archimedes spiral principle, the force arm equality principle and the linear principle that a direct load spring is within the elastic range are used. And the energy conversion acting actuating rod moves to carry out full-automatic tension compensation on the overhead line system cable. The tension compensation device has the advantages of being simple, practical, reliable in performance, constant in compensation tension, complete in function, small in occupied space, convenient to use and the like, and can meet full-automatic tension compensation of electrified railway overhead line system cables.

The utility model relates to the technical field of wind driven generators, in particular to a horizontal shaft type breeze wind turbine which comprises a support, a rotating shaft, rose-shaped fan blades and lifting force type blades, the rotating shaft is horizontally arranged on the support, the two ends of the rotating shaft are rotationally connected with the support, and each rose-shaped fan blade comprises a shaft sleeve and an arc-shaped fan blade. The arc-shaped fan blades are wound on the shaft sleeve according to the Archimedes spiral line, the lift force type blades are fixed to the rose-shaped fan blades, the downwind rotation directions of the rose-shaped fan blades and the lift force type blades are the same, and the rose-shaped fan blades are resistance type blades, are not high in rotation speed but large in output torque and can be rapidly started under the condition of low wind speed. And a higher blade tip rate ratio can be obtained by being matched with a lift type blade for use. The rose-shaped fan blade is provided with three arc-shaped fan blades, the lift-type fan blade is provided with three sets of supporting rods and wing-shaped fan blades, the supporting rods play a role in supporting and fixing the arc-shaped fan blades, and the wing-shaped fan blades can obtain a higher blade tip rate ratio.

The invention relates to the technical field of valves, and particularly discloses a micro flow adjusting structure applied to particle-containing working conditions, which comprises a valve body, a valve seat, a valve rod and a valve core, the valve core is in close fit with the top of the valve seat, the valve rod drives the valve core to move relative to the valve seat, the sectional area of a flow channel between the valve core and the valve seat is controlled, and flow adjustment is realized; a throttling device is arranged at the bottom of the valve body and comprises a throttling part, a cleaning part and a connecting part which are sequentially connected from top to bottom, and the throttling part is in close fit with the bottom of the valve seat; the connecting part is movably inserted into the bottom of the valve body, the connecting part moves relative to the valve body to drive the throttling part to move relative to the valve seat, the sectional area of a flow channel between the throttling part and the valve seat is controlled, and flow adjustment is achieved. A reverse Archimedes spiral groove is formed in the outer wall of the cleaning part. By means of the technical scheme, the technical problems that in the prior art, dynamic sealing and self-cleaning capacity is insufficient, and micro-flow precision and particle resistance cannot be considered at the same time can be solved.

A spiral spring structure formed through the thickness of a silicon substrate provides mechanical compliance in electronic packaging applications. The structure comprises a Fermat-Archimedean spiral having two anchored ends, combining Fermat spiral geometry with Archimedean spiral arm spacing. This configuration enables simultaneous strain relief in X, Y, and Z directions while maintaining consistent spacing between adjacent arms for reliable manufacture. The spiral spring structure can accommodate signal lines crossing through a redistribution layer. This design enables practical implementation of large-scale silicon substrates by effectively managing thermal and mechanical stress.

A design method and system for a cutting structure of a PDC drill bit with spiral blades is provided, including carrying out uniaxial and triaxial compressive strength tests on outcrops or underground cores to obtain rock mechanical parameters; establishing a three-dimensional cutting structure of the PDC drill bit based on an archimedean spiral and front and rear row teeth of the PDC drill bit; establishing a bit-rock finite element model based on the rock mechanical parameters and the three-dimensional cutting structure of the PDC drill bit; obtaining a time history curve for weight-on-bit and torque-on-bit based on the bit-rock finite element model; establishing a design scheme for the cutting structure of the PDC drill bit based on the time history curve; and obtaining the cutting structure of PDC drill bit with spiral blades based on the design scheme for the cutting structure of the PDC drill bit.

The utility model belongs to the field of Archimedes spiral, particularly relates to an electric servo and hydraulic servo mixed demonstration platform, and aims to solve the problems that when an existing Archimedes spiral is demonstrated, a device for accurate description is lacked, only a shape can be drawn roughly, the graph accuracy is reduced, and the demonstration effect is poor. The demonstration assembly comprises a workbench, the top of the workbench is fixedly connected with a fixing plate, one side of the fixing plate is fixedly connected with a hydraulic cylinder, the top of the hydraulic cylinder is provided with a servo valve, and one side of the servo valve is provided with an oil pipe. The output flow is controlled by adjusting the opening of the valve element of the servo valve, the extending / retracting speed of the oil cylinder can be controlled, the curve of the oil cylinder and the curve of the oil cylinder are coupled, the Archimedes spiral can be obtained, the extending length of the pen point can be controlled, and the standard Archimedes spiral can be conveniently drawn on paper.

The invention discloses a spherical gear clamp and a robot for manufacturing a spherical gear. The clamp comprises a base, a first bevel gear, a second bevel gear, a profiling claw and a positioning block. The first bevel gear is rotationally installed in the base. The second bevel gear is rotationally installed on the base, meshed with the first bevel gear and provided with Archimedes spiral teeth. The bottoms of the profiling claws are meshed with the Archimedes spiral teeth, and the tops of the profiling claws are provided with clamping cambered surfaces. The first bevel gear rotates to drive the second bevel gear to rotate, so that the Archimedes spiral gear drives the profiling claw to move in the radial direction of the base, and the multiple clamping cambered surfaces are attached to and clamp the spherical surface of the spherical gear to achieve axial positioning. The bottom end of the positioning block is detachably installed on the base, and the top end of the positioning block can be matched with a positioning hole formed in the spherical gear to achieve circumferential positioning. The machining method has the technical effects of improving the machining precision, ensuring the gear meshing performance, prolonging the service life of the gear and adapting to machining of spherical gears of various specifications.

The present invention discloses a roller vane pump, which comprises a roller (1), a stator (2), a rotor (3), an upper end cover (4) and a lower end cover (5); the inner profile line (201) of the stator (2) includes 8 curves, which are in sequence: top circular arc AB, first transition curve BC, first Archimedean spiral CD, second transition curve DE, bottom circular arc EF, third transition curve FG, second Archimedean spiral GH, and fourth transition curve HA, and the adjacent curves of each section are smoothly connected; two Archimedean spirals and four transition curves are adopted to connect the top circular arc AB and the bottom circular arc EF, so as to ensure the continuity of the second derivative of the radius vector at each connection point of the inner profile line (201) of the stator, thereby ensuring no impact during the working process; the formed closed working chamber for pressurizing the liquid has an annular shape, and the rotation of the rotor in this part does not change the volume of the closed working chamber, thereby avoiding the problem of water hammer, and at the same time having good sealing performance.

This utility model relates to the field of knitting equipment technology, and in particular to a saddle. Its adjusting shaft has a spiral groove, and a positioning pin extends into the spiral groove. The core trajectory line of the spiral groove is an Archimedean spiral. The vertical plane corresponding to the central polar axis of the core trajectory line is defined as the first vertical plane, and the vertical plane corresponding to the axis of the positioning pin is defined as the second vertical plane. The first and second vertical planes are spaced apart, and the pressure direction between the positioning pin and the spiral groove is approximately on the second vertical plane. This design ensures that the pressure direction between the positioning pin and the spiral groove is approximately vertically upward, preventing the pressure from generating rotational torque on the adjusting shaft, thus preventing the adjusting shaft from rotating and ensuring that the slider does not shift in the vertical direction, achieving precise adjustment and positioning.

The utility model discloses an ejector pin module capable of simply and accurately controlling speed, which comprises a driving ejector pin seat, and an ejector pin component is mounted at the top of the driving ejector pin seat; the driving ejector pin seat comprises a base, a first bearing, an extension spring, an Archimedes spiral cam and a servo motor, an ejector pin assembly fixing plate is fixed to the base, an original point sensor is fixedly arranged on one side of the upper end of the base, and a crossed roller guide rail is fixedly arranged on the base; the ejector pin assembly comprises a connecting seat and a step pin, the connecting seat is connected with the base through a crossed roller guide rail, the connecting seat is fixedly connected with a second bearing through the step pin, the second bearing is stretched through an extension spring to keep in contact with the Archimedes spiral cam all the time, an ejector rod is arranged above the connecting seat, and the ejector rod is fixed to the connecting seat; according to the utility model, the problem that when the speed of the ejector pin and the speed of the suction nozzle are difficult to accurately match, the suction nozzle cannot peel off a chip from a film material or the chip is crushed and damaged is solved.

A design method and system for a cutting structure of a PDC drill bit with spiral blades is provided, including carrying out uniaxial and triaxial compressive strength tests on outcrops or underground cores to obtain rock mechanical parameters; establishing a three-dimensional cutting structure of the PDC drill bit based on an archimedean spiral and front and rear row teeth of the PDC drill bit; establishing a bit-rock finite element model based on the rock mechanical parameters and the three-dimensional cutting structure of the PDC drill bit; obtaining a time history curve for weight-on-bit and torque-on-bit based on the bit-rock finite element model; establishing a design scheme for the cutting structure of the PDC drill bit based on the time history curve; and obtaining the cutting structure of PDC drill bit with spiral blades based on the design scheme for the cutting structure of the PDC drill bit.

An electric valve includes a valve body, the valve body includes a valve seat assembly and a gear slider, the valve seat assembly includes a first plate body portion, a second plate body portion, a third plate body portion, a first connecting pipe and a second connecting pipe, the third plate body portion includes a flow regulating portion and a valve mouth portion, the valve mouth portion passes through the third plate body portion, the flow regulating portion is located on one side of the mating surface and is recessed inward relative to the mating surface; the edge line of the flow regulating portion includes a first curve and a second curve, the valve mouth portion has a valve mouth contour line, the first curve and the second curve both intersect with the valve mouth contour line, and the spacing between the first curve and the second curve gradually increases along the direction approaching the valve mouth portion, the first curve adopts an Archimedean spiral or a circular arc line, the second curve adopts an Archimedean spiral, and the diameter φ of the valve mouth portion is in the range of 1.2mm<φ<2mm.