62 results about "Axial torsion" patented technology

A device and a method are disclosed for testing a curved panel assembly, which simulates a segment of an aircraft fuselage barrel section, subjected to combined loading. The device includes an axial load head assembly attached to the test panel assembly via one axial load fitting and configured to apply an axial load to the test panel assembly, and an axial-torsion reaction box connected to the axial load head assembly via linear journal bearing assemblies, where the axial-torsion reaction box is configured to be rotated by a pair of torsional loading systems to apply a torsional load to the test panel assembly. The device also includes a gore section attached to hoop load fittings of the test panel assembly, configured to provide degrees of freedom that constrain the test panel assembly to load and deflect as it would naturally in an actual fuselage barrel, form a plenum box to apply an internal pressure load, and provide hoop loading systems that complete the full hoop load application to the test panel assembly. A fixed reaction box attached to the test panel assembly via another axial load fitting rigidly attaches the test panel to the self-reacting frame, completing the internal load path of the overall system.

A device and a method are disclosed for testing a curved panel assembly, which simulates a segment of an aircraft fuselage barrel section, subjected to combined loading. The device includes an axial load head assembly attached to the test panel assembly via one axial load fitting and configured to apply an axial load to the test panel assembly, and an axial-torsion reaction box connected to the axial load head assembly via linear journal bearing assemblies, where the axial-torsion reaction box is configured to be rotated by a pair of torsional loading systems to apply a torsional load to the test panel assembly. The device also includes a gore section attached to hoop load fittings of the test panel assembly, configured to provide degrees of freedom that constrain the test panel assembly to load and deflect as it would naturally in an actual fuselage barrel, form a plenum box to apply an internal pressure load, and provide hoop loading systems that complete the full hoop load application to the test panel assembly. A fixed reaction box attached to the test panel assembly via another axial load fitting rigidly attaches the test panel to the self-reacting frame, completing the internal load path of the overall system.

A reinforcing bar straightening and cutting-off machine features that a hydraulic cylinde is arranged in the base of paying out frame for both rotating and inclining the paying out frame, two sets ofstraightening mechanism are used for preventing axial torsion of reinforcing bar by rotating oppositely, its straightening rotor has T-shaped slot and circular guide sleeve for regulating the straightening roller, and a hydraulic cylinder is used as the power source of cutting off. Its advantages are easy feeding, compact structure, high straightening quality and precise sizes.

The invention relates to a device and a method for testing the structural fatigue of an H-shaped vertical shaft wind turbine blade. The device comprises a support base component, a distribution beam, a loading hoop, a support connecting rod and an eccentric motor, wherein the distribution beam, the loading hoop and the support connecting rod are connected together by using bolts so as to form a whole load distribution system, so that the fatigue load which acts in an upper and lower reciprocation manner can be effectively conducted. When the device is used for experiment, the fatigue bending moment distribution of the blade under various working conditions can be simulated by adjusting the length L of the distribution beam and the position B of the loading hoop, and the fatigue stress state of the blade in axial torsion and multiple attack angles can be simulated by adjusting the structural modes of the support base component and the loading hoop; the strain distribution of the blade under the fatigue loaded condition can be measured, and furthermore, the fatigue structural property of the blade can be evaluated; by only exerting one external fatigue load to the device, combined fatigue loading modes such as bending, torsion and multiple attack angles of the blade can be achieved, and the device is simple and convenient to operate, accurate and reliable in result and relatively high in universality.

The invention provides a reflecting surface antenna double-beam forming design method. Through creatively introducing a double-beam covering area shape characteristic analyzing step in a designing process, a targeted initial beam acquiring manner and a corresponding antenna structure configuration strategy are made. Based on searching of a reflection plane scattered field focusing point under planar wave excitation according to a conjugate field matching theory, a rotation rule in long axis direction of a longitudinal movement beam of feed sources at two sides of a focusing point is utilized, and wave beam covering matching design is performed. Through feed source position adjustment, axial torsion of the whole reflection surface antenna system is performed, thereby improving beam covering matching property of double beams and performance of a restraining area, and furthermore improving gain of a double-beam coverage area after optimization. According to the reflecting surface antenna double-beam forming design method, according to a wave beam shape characteristic relationship, antenna layout and the like, and design principles such as a wave beam shape is adjusted according to the feed source position. A design order, a parameter selecting principle and technical details in double-beam design are described, and gain improvement of the double-beam coverage area is realized.

The invention discloses a tension string of composite insulators for overhead transmission lines, which comprises two composite insulators (1), and is characterized in that one end of each composite insulator (1) is provided with a ball-and-socket structure (2), and the other end is provided with The ball head structure (3), the ball socket structure (2) is connected to the grounding end fittings string, the ball head structure (3) is connected to the high voltage end fittings string, and the grounding end fittings string or the high voltage end fittings string are provided with at least two inner arc U-shaped The ring (12) and the inner arc U-shaped ring (12) are connected ring-to-ring. The invention enables the string of fittings to rotate axially at a certain angle by changing the connection mode between the fittings, thereby avoiding the axial torsion of the composite insulator. Destroy the connection strength between the mandrel and the end fittings.

Each of belt layers of a pneumatic radial tire includes a plurality of single steel wires with an identical wire diameter extending linearly in an identical direction in alignment with each other and embedded in rubber. Each of the wires is provided with axial torsion. On the outer surface of a tread portion, circumferential grooves extend in the circumferential direction of the tire. The wire diameters of the single steel wires are 0.28 mm to 0.38 mm. An average of intervals of the single steel wires is not less than 0.10 mm. The tire has an out-of-plane bending stiffness of not less than 6000N·mm2 per inch of length of the tread portion in the circumferential direction when a force application point is located at the circumferential groove. The implanted density E (wires / 50 mm) of the single steel wires satisfies E≧1869×d2−1838×d+493, where d is the wire diameter.

The invention discloses a multi-degree-of-freedom paper folding joint structure. The joint structure comprises a multi-layer unit structure and the multi-layer unit structure is composed of multiple layers of single-layer unit structures. Each single-layer unit structure comprises M (M is greater than or equal to 4) adjacent basic units; each basic unit comprises two symmetrical isosceles trianglefolding units of which the bottom edges are connected; a four-node space structure with two isosceles triangle surfaces is formed; the bottom edge of each basic unit is a valley line crease, and theother four edges of each basic unit are mountain line creases; the adjacent basic units are connected end to end according to the mountain line creases to form one single-layer unit structure; and thesingle-layer unit structures are further connected with the adjacent single-layer unit structure through the mountain line creases of the basic units to form the multi-layer unit structure. The jointstructure can achieve axial torsion and multi-directional bending at the same time.

A plurality of individual elements are imparted with reverse axial twist and collectively twisted into a multi-element assembly. Each individual element has an axial twist direction in an opposite direction from the axial twist direction of the collective multi-element assembly. The reverse axial torsion in the assembly tightly binds the plurality elements in the assembly to resist separation.

The invention discloses a suspension string of composite insulators for overhead transmission lines, which comprises a composite insulator (1), and is characterized in that the upper end of the composite insulator (1) is provided with a ball socket structure (2), and the lower end is provided with a ball head structure (3). , the ball-and-socket structure (2) is connected to the grounding end fittings string, the ball head structure (3) is connected to the high-voltage end fittings string, and at least two inner arc U-shaped rings (12) are arranged on the grounding end fittings string or the high-voltage end fittings string, and the inner The arc U-shaped ring (12) is connected ring-to-ring. The invention enables the string of fittings to be axially twisted at a certain angle by changing the connection mode between the fittings, so as to avoid the axial twisting of the composite insulator and damage the mandrel and the end. The joint strength of hardware.

The invention provides a connection structure of a connection end of a component and a connection terminal used in instruments and meters, discloses the connection structure of the connection end of the component and the connection terminal which is especially suitable for the field of electric energy meters, and aims at providing the connection structure of the connection end of the component and the connection terminal which is simple in structure, low in resistance in a contact position of the connection end of the component and the connection terminal, large in axial torsion of the connection terminal and low in self-power-consumption. The connection structure of the connection end of the component and the connection terminal comprises the connection terminal and a sampling device, wherein the connection terminal is a metal connection cylinder. Two ends of the metal connection cylinder are respectively provided with opposite holes, and the opposite holes are not communicated with each other. One end of the connection terminal is provided with a connection hole used for input and output of meter external power, and the other end of the connection terminal is connected with an input and output end binding post of the component, and a compression joint structure is formed by the other end of the connection terminal and the input and output end binding post of the component. The connection structure of the connection end of the component and the connection terminal has the advantages of being simple in structure, and convenient to produce and assemble. Meanwhile, the connection structure of the connection end of the component and the connection terminal can not loose or fall off easily and can improve usability of the component and the like.

The invention discloses a cable dividing device with an anti-turning function and arranged on a cable stranding machine. The cable dividing device is characterized by being arranged in the shape of a hollow cone frustum 1, the peripheral face of the cone frustum 1 is smooth, a cable dividing plate 2 is arranged at the table face end of the cone frustum 1, a center hole 21 is arranged at the center of the cable dividing plate 2, a plurality of core wire through holes 22 are arranged on the periphery of the center hole 21, a hollow shaft rod 3 is arranged at the center of the hollow cone frustum 1, the center axis of the hollow shaft rod 3 is overlapped with the center axis of the hollow cone frustum 1, and one end of the hollow shaft rod 3 is fixed in the center hole 21 of the cable dividing plate 2. The cable dividing device has the advantage that contact area of a signal wire group and the conical face is greatly increased in the cabling process, and friction resistance is increased to enable the signal wire group not to be turned with axial torsion and guarantee that relative position between the signal wire group is stable. Cabled signal cables are good in appearance rounding degree, and electric performance of the signal cables is greatly improved. Simultaneously, the cable dividing device is suitable for being used in the cabling process of power cables.

The invention discloses a preparation process of a round flat steel wire suitable for a valve spring, and belongs to the technical field of heat treatment processing of a metal material. The process comprises the following steps: pickling and phosphating, performing round mold drawing, performing quench tempering, collecting a plate, performing rolling molding, destressing and tempering, and packaging and putting in storage. A round steel wire subjected to pickling and phosphating as well as round mold drawing is subjected to process routes of performing quench tempering treatment, performingrolling molding and then destressing and tempering. By the process provided by the invention, the axial torsion of the similar round flat steel wire in the production process can be effectively controlled, and the similar round flat steel wire for the valve spring can be produced and has the advantages of high precision, uniform stress, convenience in processing, high bearing capacity, excellent fatigue resistance and excellent elasticity attenuation resistance; meanwhile, the preparation process has the advantages of simple process, good steel flatness, high precision, low torsion degree, high spring winding finished product rate and the like.

A needle bearing including a cage that is shrinkable or extensible in a circumferential direction, which can prevent plastic deformation and ensure both of a sufficient strength for axial torsion and a sufficient deformation amount. In a drawn cup needle bearing, a cage includes a plurality of elastic deformation portions along a circumferential direction thereof, which are shrunk in the circumferential direction. The elastic deformation portions are formed symmetrically with respect to an intermediate portion C in an axial direction of the cage.

The invention relates to a high-precision combined photoelectric mast set system, belongs to the field of photoelectric resistance and especially relates to a high-precision photoelectric mast system. The high-precision combined photoelectric mast set system is used for solving the technical problem of the influences of a torsion clearance along an azimuth direction and the vibration along a pitching direction of a single-rod mast on a high-precision photoelectric resistance device on an operating platform. According to the technical scheme for solving the technical problem, the high-precision combined photoelectric mast set system comprises single-rod masts, a base, a mast fixing component, a torque motor, a fixing and hanging assembly for the middle part of a mast set and a mounting platform for a photoelectric resistance system. According to the structure design of the mast set composed of multiple single-rod masts, the inevitable axial torsion clearance of the single-rod masts during the working process is smartly eliminated, the capabilities of resisting wind load and resisting swinging are enhanced and the precision level along the pitching direction is increased.

Provided is a pneumatic radial tire comprising a belt layer that is formed by aligning a plurality of single-line steel wires (10) and embedding the steel wires in rubber. The pneumatic radial tire maintains good tire durability while enabling reduced rolling resistance, and is provided with: a pair of bead sections; a pair of side wall sections; and a tread section in which the belt layer, said belt layer being formed by aligning a plurality of single-line steel wires (10) and embedding the steel wires in rubber, is provided between the pair of side wall sections on the outer peripheral side of a carcass layer in the tread section, said carcass layer being mounted between the pair of bead sections. The strand diameter of the single-line steel wire (10) is 0.30-0.40 mm. Each single-line steel wire (10) is provided with axial torsion. The wire surface torsion angle (theta) with respect to the axial direction of the single-line steel wire (10) is 1°-15°. The surface residual stress of the single-line steel wire (10) is less than 0 MPa.

In a conveyor for transporting and overturning flat objects, such as sheaves of paper or printed materials, a first ring-bound belt (10) is positioned above a second belt (20), which is also ring-wound, in such a way that an active branch (13) of the first belt (10) faces and is in contact with a corresponding active branch (23) of the second belt (20). The first belt (10) and the second belt (20) are subject to an axial torsion of 180°, thus exchanging their positions in such a way that the sheaves (2) which are inserted into an input section (30) exit overturned from an output section (40). Further, the first belt (10) is longitudinally staggered in relation to the second belt (20), in such a way that an upstream roller (11) of the first belt (10) is staggered in relation to a corresponding upstream roller (21) of the second belt (20), and that the downstream roller (22) of the second belt (20) is staggered in relation to a downstream roller (12) of the first belt (10).

Object of this invention is to provide an axial torsional vibration measurement device of the reactor internal pump capable of measuring the axial torsional vibration easily. The vibration detector 2 that detects vibration in the radial direction, and the sound detector 3 that detects vibration in the circumferential direction are fitted on cylindrical motor casing 6, which contains the motor of a reactor internal pump. The dimension of both signals of a vibration waveform signal detected by the vibration detector 2, and a sound waveform signal detected by the sound detector 3 are matched in vibration calculating device 15, to thereby obtain an axial torsion vibration of a motor from the difference of both signals.

The invention relates to a manufacturing method of a separation block for separating a conductor of a power cable with large cross section. The method comprises the following steps of (1) compacting and forming procedure, adopting a compacting die, enabling the hole type of the compacting die to be uniform with the type and size of the separation block, firstly, enabling a single copper line and an inner conductor of the separation block to penetrate through the compacting die, and compacting and forming an outer conductor of the separation block by the compacting die; and (2) pretwisting procedure, enabling the compacted and formed separation block to penetrate through press wheels by the compacting die, enabling the hole types of the closed press wheels to be uniform with the hole type of the compacting die, and providing axial torsion for the press wheels when the separation block penetrates through the press wheels, so as to pretwist the separation block. The method has the advantages that the press wheels are replaced by the compacting die to compact and form, and meanwhile, a pretwisting pitch is provided for the press wheels same in shape and size; and the condition of abnormal shape of the separation block due to the nonuniform stress of the sector surface of the compacting die caused by only using the compacting die for completing compacting, forming and pretwisting can be avoided.

The invention relates to the field of corrugated pipes, in particular to an improvement device of a high-density polyethylene double-wall corrugated pipe. The improvement device comprises an outer pipe; multiple sets of extension sections are uniformly arranged on the outer pipe at equal intervals; the extension sections are symmetrically provided with two sets of slide blocks up and down; clamping blocks are arranged on the slide blocks, and are inserted in the extension sections; slide sleeves are inserted in the slide blocks; shaping rods are inserted in the slide sleeves; movable sleeves sleeve two ends of the shaping rods; stretching springs are welded between the inner walls of the movable sleeves and the tail ends of the shaping rods; the movable sleeves are inserted in connecting discs; left and right sets of connecting discs are symmetrically arranged; and sealing rings are mounted on the connecting discs through gluing. As the extension sections are connected with the slide blocks through the clamping blocks, and the slide blocks are axially limited through the shaping rods, the axial torsion of the extension sections is prevented.

Each of belt layers of a pneumatic radial tire includes a plurality of single steel wires with an identical wire diameter extending linearly in an identical direction in alignment with each other and embedded in rubber. Each of the wires is provided with axial torsion. On the outer surface of a tread portion, circumferential grooves extend in the circumferential direction of the tire. The wire diameters of the single steel wires are 0.28 mm to 0.38 mm. An average of intervals of the single steel wires is not less than 0.10 mm. The tire has an out-of-plane bending stiffness of not less than 6000 N·mm2 per inch of length of the tread portion in the circumferential direction when a force application point is located at the circumferential groove. The implanted density E (wires / 50 mm) of the single steel wires satisfies E≧1869×d2−1838×d+493, where d is the wire diameter.

The invention relates to the technical field of mechanical electronic structures, and particularly discloses a heavy vehicle-mounted leveling leg with a compact structure. The leveling leg comprises a reduction gearbox assembly and a leveling support leg general assembly; the reduction gearbox assembly and the support leg general assembly are relatively independent, when the reduction gearbox assembly runs, a semi-connecting shaft transmits axial torsion, the axial torsion enables a trapezoidal force transmission lead screw to rotate, then a force bearing nut matching the trapezoidal force transmission lead screw and a stand column assembly of the trapezoidal force transmission lead screw vertically move downwards, when a foundation sitting plate assembly reaches the ground and is stressed, reaction force is transmitted to the stand column assembly through the foundation sitting plate assembly, transmitted to the force bearing nut and the trapezoidal force transmission lead screw through the stand column assembly, transmitted to a pulse disc through the trapezoidal force transmission lead screw, transmitted to a cylindrical thrust bearing through the pulse disc, transmitted to a bearing pressing upper cover through the cylindrical thrust bearing, and through a bearing pressing cover support leg, forms stress circulation in the support leg general assembly, vertical counter-acting force is not output to the reduction gearbox assembly, and the service life of the reduction gearbox is longer.

Subject of the invention is to stabilize all the resonance modes of a multi-inertial resonance system. Resonance ratio control effective for oscillation suppression of a two-inertial resonance system is applied to a first-order resonance mode. For oscillation modes of higher-order than that the phase advance compensation is used to stabilize all resonance poles. With respect to a load having high rigidity in which the reaction force to axial torsion can be neglected, all the resonance poles are stabilized by performing phase advance compensation by using only a disturbance observer.

The invention belongs to the technical field of petroleum drilling, and particularly relates to a composite impactor. According to the specific technical scheme, the composite impactor is characterized in that the two ends of the composite impactor are detachably connected with an upper drilling tool and a drill bit in a threaded mode respectively, the composite impactor comprises an axial impactpart, a torsional impact part and an auxiliary part, an impact hammer of the axial impact part axially impacts an upper shell under the combined action of a spring and high-pressure drilling fluid togenerate axial impact force, a pendulum bob of the torsional impact part impacts a lower shell in a torsional mode under the action of high-pressure drilling fluid to generate torsional impact force,a reversing switch and a central pipe are connected together in an inserted mode, and meanwhile reversing is conducted on torsional impact and axial impact respectively. According to the composite impactor, the impact hammer and the pendulum bob are pushed by the high-pressure drilling fluid to generate axial impact and torsional impact respectively, the mechanical drilling speed is effectively increased, the stick-slip phenomenon at a drill string system or the drill bit is reduced, and the composite impactor is stable and reliable in an underground complex and variable environment.

The invention discloses an adjustable axial-torsion coupling vibration suppression device for a drill string. A rotary damping structure and an axial damping structure are arranged in a drill collar.In the working process, a mass block absorbs the energy generated by the vibration of the drill string, the energy generated by the torsional vibration is consumed by a rotary elastic element and a rotary damping cylinder, and the energy generated by the axial vibration is consumed by an axial spring and an axial damping cylinder. The assembly of the whole transposition is through the match and the clamping of a boss and a groove, which is of high installation efficiency. The damping, stiffness and mass of the adjustable axial-torsion coupling vibration suppression device for a drill string can be adjusted. The adjustable axial-torsion coupling vibration suppression device is arranged inside the drill collar. The scour of the drilling fluid is beneficial to the cooling of the suppression device, so that the working performance of the system is ensured. A plurality of adjustable axial-torsion coupling vibration suppression device can be arranged in a plurality of drill collars to suppress the vibration of the entire drill string.

The invention discloses an adjustable opening spring mechanism for a circuit breaker, which comprises a circuit breaker case, a crank arm with a central fulcrum rotatably fixed on the circuit breakercase, and an opening spring with two ends connected to one end of the crank arm and the circuit breaker case respectively. The upper end of the opening spring is rotatably connected with one end of the crank arm, the lower end of the opening spring is fixed to a hanging block, a positioning plate is fixedly arranged on the bottom face of the circuit breaker case, and a lower transmission pin is movably installed on the positioning plate and arranged in the direction perpendicular to the opening spring; a plurality of adjusting gaskets and a long bolt are additionally arranged, and one end of ascrew rod of the long bolt sequentially penetrates through the through hole of the lower transmission pin and the center holes of the adjusting gaskets and then is fixedly connected with the hangingblock through threads. The stretching amount of the opening spring can be conveniently adjusted to adjust the force value of the spring, so that the action speed is adjusted; and the axial torsion inthe moving process of the opening spring can be released through the positioning pin, so that the opening spring is kept linear, the elastic loss is reduced, and the mechanical service life is prolonged.

The invention discloses a pair of guide wire fixing pliers comprising pliers handles, a pliers shaft and pliers heads. Each pliers head includes a guide wire through hole, a guide wire clamping plateand a rubber buffer pad. The guide wire through hole is defined by half-cylindrical portions of the two pliers heads. A plurality of point-shaped protrusions are evenly arranged on the pliers clampingsurface of the guide wire clamping plate and used for fixing and winding a guide wire. The rubber buffer pad covers the pliers clamping surface of the guide wire clamping plate, and a plurality of small holes are formed evenly in the rubber buffer pad. The point-shaped protrusions on the pliers clamping surface pass through the small holes in the rubber buffer pad and are exposed out of the rubber buffer pad. The pliers heads drive the guide wire clamping plate of the rubber buffer pad to clamp the guide wire, can be simultaneously fixed on a surgical drape, and are used for fixing and the winding the guide wire when required in an operation, to protect the guide wire from displacement and sliding; the guide wire through hole in the pliers head can fix the guide wire on the surgical drape, at the time the guide wire cannot be horizontally shifted, the sliding of the guide wire is effectively prevented, and longitudinal advancement and retreatment and axial torsion can be performed without affecting the operation of an operator.

The invention discloses a preparation process of a round flat steel wire suitable for a valve spring, and belongs to the technical field of heat treatment processing of a metal material. The process comprises the following steps: pickling and phosphating, performing round mold drawing, performing quench tempering, collecting a plate, performing rolling molding, destressing and tempering, and packaging and putting in storage. A round steel wire subjected to pickling and phosphating as well as round mold drawing is subjected to process routes of performing quench tempering treatment, performingrolling molding and then destressing and tempering. By the process provided by the invention, the axial torsion of the similar round flat steel wire in the production process can be effectively controlled, and the similar round flat steel wire for the valve spring can be produced and has the advantages of high precision, uniform stress, convenience in processing, high bearing capacity, excellent fatigue resistance and excellent elasticity attenuation resistance; meanwhile, the preparation process has the advantages of simple process, good steel flatness, high precision, low torsion degree, high spring winding finished product rate and the like.

An oxidizer injector for motor, which is mainly suitable for using in a combustion chamber, the oxidizer injector mainly comprises a body having a first runner assembly and a second runner assembly arranged along an axis, the first runner assembly injects oxidizer into the combustion chamber to form a forward swirl, and the second runner assembly injects oxidizer into the combustion chamber to form a reverse swirl, the axial torsion generated by the forward swirl and the axial torsion generated by the reverse swirl counteract each other, so as to solve the problem of axial torsion imbalance in the combustion chamber.

The invention discloses a logarithmic spiral blade vertical axis wind power generation device in the field of wind power generation, which comprises a rotating sleeve sleeved on a support column through a bearing, a plurality of logarithmic spiral blades are mounted on the rotating sleeve, the blades are distributed along an axial torsion angle, and the width of the blades from the root to the top is changed from narrow to wide and then narrow. The roots of the blades are fixedly connected with the rotating sleeve through the lower support, the upper portions of the blades are fixedly connected with the rotating sleeve through the upper support, the bottom of the supporting column is installed on the base, the generator is installed on the base, and the lower end of the rotating sleeve is sleeved with the generator. And vibration can be absorbed in a wide range.