353results about How to "Reduce radial force" patented technology

A device and a method for increasing or restoring a flow in a body lumen are provided. The device and the method may treat conditions related to a stroke, such as an ischemic stroke, by removing an occlusion from a blood vessel and / or reopen a blood vessel. The device may comprise a pusher tube and an expandable compartment. The expandable compartment may comprise a control element, a reconfigurable element, and supportive element. The supportive element is configured to adjust a radial force and a configuration of the reconfigurable element, thereby allowing highly efficient removal of an occlusion from a blood vessel and / or reopen a blood vessel with least or no damage to the body lumen.

A thin lining for use within a body lumen having a variety of uses and particularly suited for protecting the intimal lining of a vessel, thereby preventing the release of embolic materials through the intima and into the bloodstream, either naturally or during the implantation of a prosthetic device. The thin lining is porous enough to promote ingrowth and thin enough to avoid migration with minimal radial force being placed on the vessel walls, making the lining also suited for applications such as blocking the entrance to an aneurysm.

A plane wing titanium alloy thin-wall web efficient numerical control machining technology comprises the following steps that (1) blanking is carried out; (2) web outer contour machining is carried out, and an ear piece for locating is machined; (3) a web is clamped, and a cavity on the front face of the web is machined; (4) a web side wall is machined; (5) web quick converting is carried out, and a cavity on the back face of the web is machined; (6) the locating ear piece is removed by milling; and (7) quality testing is carried out. The rigidity of a machining technology system is improved, unstressed machining is achieved, by optimized design of a feed track, the stability of a machining process is improved, machining speed is increased, titanium alloy shallow cutting large feeding milling technology parameters are used, heat deforming during machining is lowered, rectifying processes are omitted, the metal removing rate is improved by 30%-50%, finally, machining efficiency is obviously improved, the clamping time of workpieces is obviously shortened through a quick-reloading technology, the repeated locating accuracy of clamping is guaranteed, and accordingly numerically-controlled machine tool machining efficiency is greatly improved.

A constraining structure for use with a balloon catheter can include multiple longitudinal struts and multiple, sinusoidal shaped radial rings. The constraining structure can expand to form a pattern of channels including substantially square windows. The constraining structure can modify, restrict, and control a shape and / or size of the balloon when inflated. Inflating the balloon catheter within the constraining structure can provide nonuniform pressure on a vessel wall adjacent the balloon.

The trocar system includes a cannula insertable through a body wall using an obturator having a distal tip. A traction tread disposed interiorly of the obturator inverts at the distal tip and extends proximally along the outer surface of the obturator or cannula. At the distal tip the tread can facilitate parting rather than cutting the tissue. Along the outer surface, the tread can engage the tissue to pull it proximally along the advancing obturator. This produces counter forces which can result in a net proximal force facilitating distention of the abdominal wall and separation of the abdominal wall from internal organs. The traction tread can be axially and / or radially continuous. An associated method of operation includes the steps of contacting the body wall with the traction tread at the distal tip, and engaging the body wall with the traction tread along wall portions facing the outer surface.

A constraining structure for use with a balloon catheter can include multiple longitudinal struts and multiple, sinusoidal shaped radial rings. The constraining structure can expand to form a pattern of channels including substantially square windows. The constraining structure can modify, restrict, and control a shape and / or size of the balloon when inflated. Inflating the balloon catheter within the constraining structure can provide nonuniform pressure on a vessel wall adjacent the balloon.

The invention discloses a fertilizer slurry stirring and emulsifying device and relates to fertilizer production equipment. The fertilizer slurry stirring and emulsifying device comprises a seat body, an emulsifying barrel and a stirring device, wherein the emulsifying barrel is fixed to the seat body, the emulsifying barrel comprises an outer barrel body and an inner barrel body, a partition plate is arranged in the middle of the outer barrel body, the inner barrel body is arranged in the outer barrel body and is fixed with the outer barrel body through the partition plate, a sealing cover is arranged at the top of the outer barrel body, and a discharging valve is arranged at the lower end of the outer barrel body; the stirring device comprises a driving motor, a stirring blade and a piston, the driving motor is arranged on the seat body, the stirring blade is arranged at the lower portion of the outer barrel body, the stirring blade is further in rotary connection with the outer barrel body, and the stirring blade is connected with the driving motor; the piston is in slide connection in the inner barrel body, a cylindrical cam is arranged at the lower end of the piston, and a linkage block matched with the cylindrical cam is arranged on a rotation shaft of the stirring blade; a first one-way valve is arranged on the partition plate, a second one-way valve is arranged on the piston, and an opening direction of the first one-way valve is opposite to an opening direction of the second one-way valve. The fertilizer slurry stirring and emulsifying device has a good stirring effect and can quickly emulsify slurry.

The invention discloses a mixed excitation short-magnetic-circuit variable-reluctance motor 1 as well as a stator structure and a rotor structure thereof. An inner circular face t of a base part 2 of the mixed excitation short-magnetic-circuit variable-reluctance motor is provided with modules 2-1 which protrude inwards in a preset interval angle; the stator part comprises a plurality of H-shaped stator sections 3 and first permanent magnets 4 (1) arranged at all the H-shaped stator sections p1, and the polarities of the permanent magnets of the stator sections are opposite; an exciting winding coil is embedded into two stator slots of each H-shaped stator section 3; and the rotor part comprises a rotor body 5 and a plurality of annular body rotor sections 8 arranged on the rotor body and / or second permanent magnets 4 (2), wherein the second permanent magnets are arranged on the s3 surfaces of the annular body rotor sections, and open grooves 8-1 and 8-2 are arranged on the lateral surfaces of the annular body rotor sections. According to the invention, the rotating force of the variable-reluctance motor can be increased, the energy density is improved, the torque ripple and the vibration and noise level are reduced, the performance is stable, and the size is smaller under the requirement of same output torque.

The present invention discloses a multilayer independent rotary band-operated paying out frame. It includes shaft, pedestal base stand and cable reels. The shaft is fixed on the pedestal base stand, the supporting ring is cover-mounted on the shaft, and is contacted with pedestal base stand. Several cable reels are cover-mounted on the shaft and superposition placed, between inner sleeve and outer sleeve of every cable reel the upper and lower two bearings are mounted, top portion is the bearing for bearing radial load, and the bottom portion is the bearing for bearing axial load, said inner sleeve and shaft can implement gap fit, and the outer sleeve is fixed with spoke rib, and the spoke rib is fixed with outer ring.

A novel knitted intravascular stent comprises a stent body and a medicine carrying coating, and is characterized in that a treated passive film is arranged on the surface of the stent body, the surface of the passive film is coated with the medicine carrying coating, the stent body is a diamond mesh tube formed by consecutively knitting a metal single wire, all diamond cross points are movable points, the density of diamond grids of opening ends of the stent body is smaller than that of diamond grids of a middle section, the passive film is arranged on the surface of the stent metal knitting wire, the medicine carrying coating is composed of a carrier and medicine, the medicine is wrapped on the surface of the stent passive film through the carrier and is sirolimus or taxol, and the cross section of the metal single wire can be circular or in a flat square shape. According to the novel knitted intravascular stent, the axial grid knitting densities of the stent body are different, and the surface of the stent body is coated with the medicine carrying coating so that irritation to the normal intravascular wall can be effectively reduced, the occurrence rate of vascular restenosis can be reduced, thrombosis can be reduced, and the wall attaching performance and the flexibility of the stent body can be improved.

The invention discloses an automatic ton bag supplying device and an automatic ton bag packaging system. The automatic ton bag supplying device comprises a bag supplying support, smooth shafts, a servo bag feeding mechanism, a hung bag conveying and locating mechanism, a servo traction mechanism and a hung bag fixing and locking mechanism. The automatic ton bag packaging system comprises the automatic ton bag supplying device, an automatic material feeding mechanism, an automatic sealing and filling mechanism, a packet receiving and vibrating conveyance mechanism and an automatic discharge conveying mechanism. The automatic sealing and filling mechanism is arranged above a filling area. The automatic material feeding mechanism is arranged above the automatic sealing and filling mechanism. The packet receiving and vibrating conveyance mechanism is arranged below the automatic sealing and filling mechanism. The automatic discharge conveying mechanism is arranged in front of the packet receiving and vibrating conveyance mechanism. By the adoption of the automatic ton bag supplying device and the automatic ton bag packaging system, automatic guiding in, opening, locating, filling, vibrating and discharging of ton bags are achieved, so that the supplying efficiency of the ton bags is improved, manual participation is not needed, the labor intensity of workers is lowered, the operation environment of the workers is improved, and safety accidents are prevented from happening.

The invention relates to a screw rotor end face tooth type for a double-screw pump and a twin screw compressor. The screw rotor end face tooth type is formed by multiple miscellaneous tooth curves, wherein each tooth curve comprises a cycloid curve, a circular arc, a circular arc envelope curve, an ellipse arc, an ellipse arc envelope curve and the like. The screw rotor end face tooth type has the technical characteristics that: the tooth curve on a screw rotor end face is formed by five sections of tooth curves which comprise a cycloid curve tooth curve abc, a circular arc tooth curve cde located on a dedendum circle, a circular arc tooth curve ija located on an addendum circle, an ellipse arc tooth curve efg, and an ellipse arc envelope curve tooth curve ghi by taking the ellipse arc tooth curve efg as a baseline; and a section of circular arc or two sections of circular arcs can be simultaneously added on the two sides of the ellipse arc respectively to form four different combination schemes. The screw rotor end face tooth type provided by the invention can realize strict (complete) seal, and a contact line generated through meshing is shorter; and the double-screw pump or the twin screw compressor produced by applying the invention has the advantages of high volumetric efficiency, high medium pressure capable of being delivered, and the like.

Two motors are arranged on opposing sides of a common shaft, drive plates of the pump / motors being rigidly coupled to each other, for example by being in hard contact with opposing sides of the shaft. By providing hard contact between the pump / motor drive plates and a common shaft, the drive plates and shaft act as a substantially solid element under compression, thereby substantially canceling axial loads generated by the pump / motors directly through the shaft. Residual axial loads are handled via bearings positioned on the shaft adjacent the drive plates in such a manner that the drive plates are in light contact only with the bearings. As a result, friction experienced by the bearings is substantially reduced as compared to conventional systems, thereby improving the efficiency of the system. To further reduce loads on the bearings, the pump / motors are arranged to ensure that they generate radial forces in a direction that is opposite to that of a separation force generated by a torque transferring device carried on the shaft and transmitted to the bearings. A common housing surrounding the two pump / motors, bearings and torque transferring device is divided into three regions, to segregate the bearings and torque transferring assembly from the pump / motors. In this manner, the regions containing the pump / motors are substantially filled with oil to, for example, fully lubricate the pump / motors, while the central region containing the gears and torque transferring device contains a significantly smaller volume of oil to simply splash lubricate the contents of the region, thereby reducing drag on the bearings. Control means are provided for selectively moving the two pump / motors substantially simultaneously to a selected displacement angle, using mechanical systems alone and in combination with hydraulic systems.

The invention discloses magnetized plasma artillery. A magnetic field is arranged in an artillery body pipe, the direction of the magnetic field points to an artillery port along the direction of an axis of the artillery body pipe, the magnetic field strength is gradually reduced from an inner wall of the artillery body pipe to the axis of the artillery body pipe, and the gas in the artillery body pipe can be ionized into the plasma for forming a plasma sheath layer on the inner wall of the artillery body pipe under the action of the magnetic field while the artillery is launched. The magnetized plasma sheath layer formed on the inner wall of the artillery body pipe of the magnetized plasma artillery has stress anisotropic characteristic and has thermal insulation function, and then, the radial force for the artillery body pipe is greatly reduced, the driving force for the bullet is greatly improved, the heat resistance of the artillery body pipe is greatly improved and the service life is prolonged.

The invention discloses a method and a device for driving an internal combustion engine by a straight shaft. Operating cycle of air intake, compression, do work and air exhaust is completed by the piston motion of the air cylinder driven by a straight connecting rod; the configuration direction of the straight connecting rod is consistent with the motion direction of a piston; an auxiliary connecting rod which is linked with the straight connecting rod in parallel is also arranged; the straight shaft is arranged between the straight connecting rod and the auxiliary connecting rod; a transmission wheel and a flywheel are installed on the straight shaft; the transmission wheel is positioned in the same plane with the straight connecting rod and the auxiliary connecting rod; the transmission wheel is provided with a semi-cycle gear; during the rotation process of the transmission wheel, the semi-cycle gear is alternatively meshed with gear racks on the straight connecting rod and the auxiliary connecting rod so as to generate opposite pushing to the straight connecting rod and the auxiliary connecting rod, thus the straight connecting rod and the auxiliary connecting rod perform linear reciprocating motion at the same time, and the operating cycle of the piston is realized; and by applying the technique provided by the invention, the single-cylinder driving, the dual-cylinder driving, the four-cylinder driving, the eight-cylinder driving and the twelve-cylinder driving can be realized. According to the invention, the output efficiency of the internal combustion engine can be improved by 50%-70%.

The invention provides a rotary-type translation piston compressor, and belongs to the technical field of mechanical engineering, in order to solve the problem that an existing rotary-type compressor is high in elastic stiffness of a spring. The rotary-type translation piston compressor comprises an air cylinder with a piston cavity and a crankshaft with an eccentric part positioned in the piston cavity; an air cylinder blade groove is provided with a blade; a piston is sleeved on the eccentric part; the outer side surface of the eccentric part and the inner side surface of the piston are connected through a rolling bearing component; a bar-shaped concave circular arc groove which is parallel to a piston bus is formed on the outer circumference surface of the piston; the top surface of the blade is a convex circular arc curve surface; the circular arc top of the blade is embedded into the concave circular arc groove of the piston, and the top surface of the blade and the concave circular arc groove surface butt against mutually under the effect of spring force. The rotary-type translation piston compressor is applied to 1-1.5HP air conditioners, and the elastic stiffness of the spring is only required to be controlled to 2-4Kg / mm, or even lower.

A power converter of three switches type is prepared as series-connecting a controllable switching element between coils of two series connected motors, adding a diode separately between two end of said switching element and positive as well as negative electrodes of power supply and using it as auxiliary diode, connecting cathode of a diode to positive electrode of power supply and anode of it between motor coil and controllable switching element, connecting anode of another diode to negative electrode of power supply and cathode of it between motor coil and controllable switching element.

The invention provides a submerged double-discharging magnetic driving pump for conveying liquefied natural gas. The submerged double-discharging magnetic driving pump for conveying the liquefied natural gas comprises an external high vacuum heat insulation container which is that an evaporated gas outlet is formed in the upper part of one sidewall and while a liquefied natural gas inlet is formed in the lower part of the other sidewall, and an outer sealing cover is mounted on the top part through a flange; an internal high vacuum heat insulation container is mounted inside, and an inner sealing cover is mounted on the top part of the internal high vacuum heat insulation container through the flange; a liquefied natural gas outlet is formed in the center of the inner sealing cover; an impeller housing is fixed to the inner wall of the bottom part of the external high vacuum heat insulation container by axial supporting, and an impeller is mounted to the impeller housing through a central shaft; the upper part of the impeller housing is fastened to the bottom part of the internal high vacuum heat insulation container through a fastening part; a connecting seat is mounted in the impeller housing; a central shaft is mounted in the middle part of the connecting seat through a sliding bearing and extends into the internal high vacuum heat insulation container; a submerged double-discharging magnetic part is mounted at the central shaft. The submerged double-discharging magnetic driving pump is compact and reasonable in structure, convenient to operate, high in sealing performance, safe and reliable to use, and low in vibration noise.

The invention is a double-casing volute pump, comprising a pump body, where a spiral extruding chamber is arranged in the pump body and connected with a spiral flow channel, the upper side of the flow channel is provided with an inward-projecting spacing tongue, the middle of the flow channel is provided with a baffle in the axial direction of the flow channel, the baffle extends spirally into the extruding chamber, a vane is arranged in the extruding chamber, the connecting line of the bottom end point of the baffle and the rotating center of the vane makes an included angle of 160-180 deg. with that of the spacing tongue and the rotating center of the vane; a first cavity forms between the baffle and the vanes, a second cavity forms between the vanes and the pump casing, and the two cavities are symmetrical with respect to the rotating center of the vanes. And it makes the pressures on two sides of the vane balanced all the time, able to largely reduce radial force and prolong the service life.

The invention provides a magnetic suspension wind power generator, comprising impeller, shaft, motor and bearings, where the impeller is arranged at one end of the shaft, the motor is arranged at the other end of the shaft, and one or two sides of the motor are equipped with bearings, and it is characterized in that: one or two sides of the bearing are equipped with magnetic suspension devices, which comprise one or one group of magnetic or magnetic-conducting rotators fixed on the shaft and magnetic stator device arranged outside the rotators, where the magnetic stator device comprises stator magnet which makes a height difference from the rotator and keeps an axial gap from the rotor. And the invention has features of simple, reasonable and compact structure, low cost, maintenance-free, reducing the starting wind speed of the wind power generator and able to effectively raise the output power of the power generator.

The invention relates to a hoisting mechanism automatic rope-arranging device. The hoisting mechanism automatic rope-arranging device comprises two supporting hinge seats. A spindle is arranged between the two supporting hinge seats, a rolling drum is arranged at the spindle, the rolling drum is wound with a steel wire rope, the tail end of the steel wire rope at the rolling drum is arranged in arope groove in the outer circumferential surface of a rope guiding wheel, and the rope guiding wheel is rotatably arranged on a guiding seat; the guiding seat is in threaded connection with a threadedrod A, a limiting rod is parallelly arranged above the threaded rod A, the two ends of each of the limiting rod and the threaded rod A are connected to a sliding block A and a sliding block B correspondingly, and the sliding block A and the sliding block B are slidably arranged in horizontal sliding grooves in a supporting frame A and a supporting frame B correspondingly; and the sliding block Aand the sliding block B are in threaded connection with a threaded rod B, a motor A and a motor B are connected with the outer ends of the threaded rod A and the threaded rod B correspondingly, and travel switches are arranged at the two ends of the lifting rod correspondingly. In general, the hoisting mechanism automatic rope-arranging device has the advantages that the structural design is reasonable, the steel wire rope can be effectively prevented from twisting together, and radial force borne by a guiding device is small.

The invention discloses a multi-working-condition multi-target hydraulic optimization method for an impeller of a centrifugal pump with the ultralow specific speed. The method comprises the specific steps that the lift, the power and the efficiency of the centrifugal pump with the ultralow specific speed under various working conditions are measured; a turbulence model with the smallest error between an experiment value and worked-out values of the centrifugal pump with the ultralow specific speed under various working conditions is found out; an objective function is obtained through the combination of the maximum weighted average efficiency or the minimum weighted average power under the multiple working conditions, the minimum weighted average radial force in the impeller under the multiple working conditions and the lowest weight of the impeller, a multi-working-condition multi-target optimization model of the impeller of the centrifugal pump with the ultralow specific speed is solved on the basis of a variable complexity method-multidisciplinary feasible (VCM-MDF) optimization strategy with internal and external double-circulation structures, and an impeller overall optimal solution set is obtained; and a hydraulic model of the impeller is designed according to the impeller overall optimal solution set obtained through optimization. By means of the method, multi-working-condition multi-target hydraulic optimization can be carried out on the impeller of the centrifugal pump with the ultralow specific speed, so that the hydraulic performance of the pump is improved, and the radial force in the impeller and the weight of the impeller can also be reduced.

The invention discloses an automatic casing machine for cartons. The automatic casing machine for the cartons comprises a machine frame, a feeding mechanism, a pushing mechanism, a pressing mechanism, a packaging case positioning mechanism and a discharging mechanism. The feeding mechanism comprises a feeding roller, and the feeding roller is arranged on the machine frame through a feeding frame. The pushing mechanism comprises pushing rods and a pushing rod driving mechanism, and the pushing rod driving mechanism comprises a pushing rod moving mechanism used for controlling the pushing rods to move front and back and a pushing rod lifting mechanism used for controlling the pushing rods to move up and down. The pressing mechanism comprises a pressing plate and a pressing air cylinder used for driving the pressing plate to move up and down. The packaging case positioning mechanism comprises positioning rods, a positioning shaft and a power mechanism used for driving the positioning rods to turn by 90 degrees. The discharging mechanism comprises a plurality of rows of discharging rollers. The automatic casing machine for the cartons is simple in structure and convenient and fast to operate, automatic casing is achieved, and casting is accurate; damage to finished cartons and packaging cases is avoided, and the quality of the finished cartons and the packaging cases is guaranteed; and the casting efficiency is high, the labor intensity of workers is relieved, and the carton casing cost is reduced.

The invention relates to a modular pump unit used in a multi-stage pump. A multi-stage main shaft in the multi-stage pump is used for driving an impeller to rotate and is provided with a plurality of sets of bearing systems; and single-stage modular shaft units are arranged in series, the stage number of the same pump is not constant and can be quickly and easily increased or reduced according to the requirement of working condition. By the modular pump unit, the design complexity of the main shaft of the multi-stage pump is avoided, the intensity and the hardness of the main shaft are enhanced, the axial force and the radial force applied to the shaft are reduced, so that the service life of the shaft is prolonged, the accident of shaft broken of the multi-stage pump is reduced to a great extent, the modular processing production is realized, and the application range of the multi-stage pump is expanded. Moreover, the modular pump unit has higher promotion value and practical meaning.

The invention discloses a deep water pump with pressure compensating function. The deep water pump with the pressure compensating function comprises a pump body, a hydraulic motor, a pump shaft, and an impeller which is mounted on the pump shaft, wherein the hydraulic motor is mounted on the pump body; the pump shaft is mounted in the pump body and is driven through the hydraulic motor; an oil chamber provided with a pressure compensator is arranged on the pump body; the pump shaft penetrates the oil chamber and is in sealing pivoting with the oil chamber; and the pump shaft is supported to rotate through a lubricating bearing in the oil chamber. According to the deep water pump with the pressure compensating function, the problems of lubricating and sealing of the bearing in high-speed rotating of the water pump can be solved through an oil pressure compensating device, and meanwhile, the inner pressure and the outer pressure of the lubricating oil chamber of the bearing can be balanced through the oil pressure compensating device, so that the damage of deep water high pressure to the lubricating oil chamber can be avoided.

The invention discloses a novel axial plunger pump. According to the technical scheme, the novel axial plunger pump is characterized by comprising an end cover, a front shell, a pump shaft arranged inside the front shell, a rear shell, a swash plate and a cylinder, wherein the swash plate and the cylinder are installed inside the rear shell; the end cover, the front shell, the rear shell and the cylinder are sequentially and fixedly connected, and the swash plate is connected to the end, back on to the shell, of the pump shaft; a cross-shaped swinging plate and a plunger assembly are further arranged inside a plunger pump; a plunger hole, a valve hole, a pressing-out valve set and a pressing-in valve set are arranged inside the cylinder, the pressing-out valve set and the pressing-in valve set are located in the valve hole, one end of the plunger assembly is embedded in the plunger hole, and the other end of the plunger assembly is connected with the cross-shaped swinging plate; the cross-shaped swinging plate abuts against the swash plate in a contact manner; and due to the fact that in the prior art a retainer plate and a piston shoe are embedded into a whole through a piston shoe plate, and the piston shoe and the a plunger bulb are embedded into a whole through the piston shoe plate, lateral force of the cylinder and a plunger base is decreased, meanwhile, the tilt angle of the swash plate is increased, the return distance of the plunger base is enlarged, displacement of the plunger pump is improved, the efficiency of the plunger pump is improved, and the design of the cylinder is further simplified.