82 results about "Rotational shear" patented technology

Devices and processes for performing shear-assisted extrusion include a rotatable extrusion die with a scroll face configured to draw plasticized material from an outer edge of a billet generally perpendicularly toward an extrusion orifice while the extrusion die assembly simultaneously applies a rotational shear and axial extrusion force to the billet.

A coaxial cable is provided with a specially prepared precoat layer that facilitates removal of the precoat layer when the end of the cable is cored in preparation for receiving a connector. The cable includes an inner conductor; a foam polyolefin dielectric layer surrounding the inner conductor; an outer conductor surrounding said dielectric layer; and a precoat layer disposed between the inner conductor and the dielectric layer. The precoat layer forms a first bond interface with the inner conductor and a second bond interface with the dielectric layer, wherein the ratio of the axial shear adhesion force of the first (“A”) bond to the axial shear adhesive force of the second (“B”) bond is less than 1, and wherein the ratio of the axial shear adhesion force of the “A” bond formed by the precoat layer between the inner conductor to the dielectric layer to the rotational shear adhesion force of the bond is 5 or greater.

The invention belongs to the field of asphalt mechanical performance tests and particularly relates to a test device and a test method for asphalt rotational shear creep and repeated creep recovery. The device comprises a test platform, a test specimen, a temperature control system, a loading system and a computer control system. The computer control system automatically controls maintenance temperature and creep test temperature of the test specimen through the temperature control system. Simultaneously, the computer control system further controls the loading system to complete asphalt rotational shear creep and repeated creep recovery of the asphalt test specimen. The device is applicable to testing creep and repeated creep recovery performance of asphalt cements such as common asphalt, SBS (styrene butadiene styrene block copolymer) modified asphalt, rubber asphalt and other polymer modified asphalt under rotational shear and temperature-control environments.

The invention discloses a pitch rotational shear oscillation fatigue rupture experimental device and a method and belongs to the field of pitch material tests. The pitch rotational shear oscillation fatigue rupture experimental device is composed of an experimental device, a loading system, a temperature control system and a computer control system. The computer control system is capable of controlling the temperature control system to conserve pitch test specimen and control temperatures of an experimental process. In the experimental process, the computer control computer is capable of controlling the loading system to carry out dynamic rotation shear load to the pitch test specimen. The pitch rotational shear oscillation fatigue rupture experimental device is capable of automatically controlling temperatures, big in stress than range and has multiple oscillation function. The pitch rotational shear oscillation fatigue rupture experimental device can also be suitable for determining asphalt cement complex shear modulus (G*) and phase angles (8).

The invention discloses a novel shear crusher and an application thereof. The crusher comprises a rotary feeding system, an orientating magnetic circuit iron-removing system, a rotary cutting coarse-crush system and a rod-toothed crushing knapping system. The orientating magnetic circuit iron-removing system is fixedly disposed on the rotary feeding system. The rotary cutting coarse-crush system is disposed on the lower part of the rotary feeding system. The rod-toothed crushing knapping system is connected to the lower part of the rotary cutting coarse-crush system. The invention is applied to knapping dregs of beans, with special effect, uniform granularity of knapped dregs of beans, low fines content, large output, low energy consumption, simple operation, and convenient maintenance. The invention has the function of a tractor serving multiple purposes.

The invention discloses a vacuum defoaming device and a defoaming method for high-viscosity liquid. The vacuum defoaming device is provided with two opposite defoaming baffles and a large-area spiralplate; so high-viscosity liquid is always in the state of a thin-film flow layer, which allows the surface area and the surface tension of the high-viscosity liquid to be greatly increased and bubblesto be effectively eliminated; and the low-speed rotation of the spiral plate accelerates the film formation speed and the flowing speed of the high-viscosity liquid, and the rotational shear force generated by the spiral plate can also eliminate bubbles. The defoaming method of the invention adopts multiple defoaming manners, and performs efficient and stable defoaming through a combination of acertain degree of vacuum, the rotating speed of the spiral plate and the flow control of feed and discharge flow valves. According to a technical scheme described in the invention, the vacuum defoaming device has the advantages of simple structure, simple operation, low energy consumption, low cost, high defoaming efficiency and the like, is suitable for defoaming of high-viscosity liquid, and canprotect high-viscosity liquid from the adverse impact of high temperature, defoaming agent and the like.

The invention relates to the field of agricultural machinery, in particular to a biomass crushing cut-off machine with an auxiliary cutting piece arranged in a feeding device. The biomass crushing cut-off machine comprises a driving device, the feeding device, a work chamber and a main shaft assembly. The feeding device, the driving device and the main shaft assembly are all arranged on the work chamber. Biomass enters the work chamber through the feeding device and conducts rotational shear through the main shaft assembly. The main shaft assembly is driven by the driving device to rotate. The work chamber is provided with a discharging outlet. A conveying mechanism and an auxiliary cutting mechanism are arranged inside the feeding device. The biomass is conveyed through the conveying mechanism to enter the auxiliary cutting mechanism after entering the feeding device, and then conducts auxiliary cutting through the auxiliary cutting mechanism. By means of the biomass crushing cut-off machine, the biomass can be crushed or torn or subject to other pretreatments before being cut, hence, processing efficiency is improved, and the utilization rate of processed biomass feed is increased.

Devices and methods for lightsheet microscopy using rotational-shear interferometry are provided. Advantages include improved lateral spatial resolution and easier alignment.

The invention discloses an in-situ detection shearing device of a loess hole. The in-situ detection shearing device comprises a motion carrier, a shearing part and an air bag carrier, wherein the motor carrier drives the shearing part and the air bag carrier to climb a wall and walk, the loess shearing tool is borne by the shearing part, the shearing part is used for driving the shearing tool to rotate and cut after the motor carrier reaches a detection position, the air bag carrier is connected with the shearing part and comprises a main air bag carrier and a side air bag carrier, the main air bag carrier bears a main air bag and is used for solidifying hole soil, the side air bag carrier bears a side air bag, and the motion carrier and the side air bag are jointly used for measuring a shearing force. In the shearing force, in-situ measurement test of soil shear strength can be performed in a loess underground pipeline, and soil shear strength at different soil layer positions can beaccurately measured.

The arc hedge knife of the present invention relates to the field of garden pruning equipment, in particular to an arc hedge knife, comprising a shearing knife body and two arc-shaped knife rests, and the two arc-shaped knife rests are rotatably connected to form a semicircular knife rest. The two ends of the semicircular knife rest are connected to the two ends of the shearing knife body in rotation, and the semicircular knife rest is provided with a through-axis motor, and the two output ends of the through-axis motor are connected to the shear through a flexible shaft. The two ends of the cutter body are connected; the present invention has simple structure, convenient operation, rapid trimming and accurate positioning. The two ends of the semicircular knife holder are respectively connected to the two ends of the shearing cutter body in rotation, and are driven by a vertical rotating motor. The shearing knife body rotates in the vertical plane, and the shearing knife body is rotated to the horizontal plane to facilitate positioning, so that the center of the shearing knife body is aligned with the center of the ball tree, and combined with the horizontal rotation motor, the shearing knife body can be positioned in the horizontal plane. It can rotate in the horizontal plane and can also rotate in the vertical plane to improve the pruning efficiency and the pruning effect is good.

The invention discloses an aluminum pipe extrusion die with rotary shearing force. The die comprises an upper die body. A die core is arranged in the center of the lower end face of the upper die body; a double-cone body is arranged in the middle of the die core; the double-cone body is divided into an upper cone body and a lower cone body; the upper cone body and the lower cone body are containedin a welding chamber; the lower die body is arranged right under the upper die body; and a cylindrical straight gear is arranged on the outer side of the lower die body. The die is simple in structure; die repairing and die changing are convenient; the gear of the lower die is engaged by an external gear and is driven to rotate; the surface of the upper cone body in the middle of the upper die core can achieve a flow guide effect, so that the aluminum material can rotate more sufficiently in the welding chamber formed by the lower die and the upper die; the aluminum material is sheared and deformed in the rotating process, so that grains of the aluminum material are further refined; and the aluminum material is welded after rotating, and the mechanical property of an extruded aluminum pipe is improved, so that the quality of the aluminum pipe is improved.

A rotational shearing filter is disclosed which includes a housing and several spaced-apart, stationary, coaxial, annular, hollow filter disks that are disposed therein. Several shearing elements are retained in a torsion-proof manner on a central, rotatable drive shaft which penetrates the filter disks. The shearing elements are placed next to the annular surfaces of the filter disks, which point in the axial direction of the housing, so as to keep the filter disks penetrable for filtrate that penetrates from the housing into the filter disks. In order to prevent the shearing elements and the filter elements from touching each other as a result of thermal expansion, the shearing elements that are connected to the drive shaft so as to rotate therewith are guided thereon in an axially movable manner while spacers which axially displace the shearing elements according to longitudinal modifications of the housing occurring due to thermal conditions are positioned between the shearing elements. The spacers can be arranged directly between adjacent shearing elements and can be made of a material corresponding to the thermal expansion behavior of the housing. Alternatively, the spacers can be made of a largely random material while limiting the minimum distances between the shearing elements and the filter disks or the facing housing walls.

The invention discloses a different-axis rotary shearing energy-absorbing aero seat which comprises a chair basin, a side plate, a backrest, a connecting plate, a shearing pin, a shearing ring and a driving mechanism. The side plate is fixed on the left side or the right side of the chair basin; the lower end of the backrest is hinged to the rear side of the chair basin, and the hinged axis of thebackrest and the chair basin is a first axis; the first end of the connecting plate is hinged to the side plate, the second end of the connecting plate is hinged to the backrest, the shearing ring isarranged at the third end of the connecting plate, and the hinged axis of the first end of the connecting plate and the side plate is a second axis; when the backrest bears large inertia and inclinesforwards, the backrest rotates relative to the side plate with the first axis as the rotating axis, in the process, the shearing ring is torn open by the shearing pin, the rotating axis of the backrest and the axis of the shearing ring are staggered through the structure, and meanwhile interference of a linkage structure on stress of the shearing ring is avoided.

The invention relates to a rotary shearing mechanism and a laying head for automatic fiber laying and forming, and aims to solve the problem that gaps and overlapping defects exist at the boundary of a laying track. The rotary shearing mechanism comprises a motor, a machine base, a flange shaft, a driving gear, a linear guide rail, a knife rest assembly, an extended stepped shaft, a driven gear, a air cylinder sleeve and an air cylinder, and the laying head comprises a rotary shearing mechanism, a re-conveying mechanism, a clamping mechanism, a first guide roller, a jumping roller, a second guide roller, an adapter plate, a third guide roller, a charging tray, a compression roller cylinder, a compression roller and a frame body. A motor shell is installed on the machine base, the flange shaft is fixedly installed on an output shaft of the motor in a sleeved mode and connected with the driving gear, a piston rod of the air cylinder is connected with one end of the extended stepped shaft, the knife rest assembly is installed at the other end of the extended stepped shaft, the other end of the air cylinder sleeve is fixedly connected with the driven gear, and the driving gear is meshed with the driven gear. The invention belongs to the technical field of automatic molding of matrix composite materials.

The invention relates to the technical field of material transportation equipment, in particular to a fluid feeding device with a stirring function, which comprises a temporary storage tank, a stirring mechanism is arranged on the temporary storage tank, and the stirring mechanism comprises a mixing stirrer; the mixing stirrer comprises an axial-flow stirrer and a marginal stirrer fixedly arranged above the axial-flow stirrer, and the marginal stirrer comprises a first shaft sleeve fixedly arranged on a first stirring shaft and a second stirring shaft, a C-shaped frame blade fixedly arranged on the first shaft sleeve, an auxiliary blade fixedly arranged on the C-shaped frame blade and flow guide plates fixedly arranged on the C-shaped frame blade; and a rectangular cavity is defined by the C-shaped frame blade and the auxiliary blade, and the flow guide plates are longitudinally distributed in the rectangular cavity at equal intervals. The two axial-flow stirrers synchronously rotate in different directions to form strong vortex flow, so that solid particles in fluid are suspended between the two axial-flow stirrers, sedimentation is avoided, axial and radial flow of the fluid is promoted through rotary shearing provided by the marginal stirrer, and the mixing degree of the fluid is improved.

The invention discloses a progressive rotational shear feeding method and a progressive rotational shearing machine. The progressive rotational shearing machine comprises a clamping stationary knife for fixing a blank and a moving knife for shearing a feed section of the blank, and is characterized in that the clamping force of the clamping stationary knife and the moving knife is radial, and two or more than two stressed parts are availableand centrosymmetric; and the moving knife is sleeved in a dual-crankshaft mechanism or a flywheel slider mechanism, the dual-crankshaft mechanism or the flywheel slider mechanism drives the moving knife to rotate the feed section of the blank by 360 degrees and progressively shear the feed section along the radial direction. The progressive rotational shear feeding method solves the problems of the conventional cutting feeding method and shear feeding method; and the invention has the advantages that the efficiency is high, the waste of raw materials is avoided, the cost is low, the cut is flat without bevel angles or collapsed corners, the blank is not deformed, the blank with the extremely small draw ratio can be cut off, pipes and sections can be cut off and the like.

A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.

The invention discloses an aerogel fiber with specific section morphological characteristics and a preparation method and device thereof, the arrangement form of section two-dimensional nanosheets of the aerogel fiber is adjustable, and the adjustment method is as follows: during wet spinning, a rotating flow field device is additionally arranged before a spinning solution fluid is sprayed out, and the spinning solution fluid is sprayed out to form the aerogel fiber with the specific section morphological characteristics. A rotating flow field enables the two-dimensional nanosheets to form a specific lamellar arrangement form in the section direction of the gel fiber under the action of rotating shearing, and the gel fiber with the section structure in the specific form is prepared into the graphene oxide aerogel fiber with the specific form structure (concentric circles and spiral lines) under the freeze-drying condition. The hydrogel fiber with the concentric circle structure is dried, densified, stretched and reduced to obtain the graphene fiber with high modulus and high thermal conductivity, and compared with the existing graphene fiber, the thermal conductivity and modulus of the graphene fiber are improved.