602 results about "Torsional deformation" patented technology

An optical deflector, including a fixed base; a mirror having a light reflection surface; a pair of elastic support members oscillatably supporting the mirror; and a pair of drive beams formed of a beam-shaped member on which a piezoelectric is fixed, wherein the elastic support members and the drive beams in longitudinal directions are almost orthogonally located and connected with each other, other ends of the drive beams are fixed on the fixed base, the mirror and the pair of elastic support members are cantilevered by the pair of drive beams relative to the fixed base, and bending oscillation of the drive beams causes torsional deformation of the elastic members to rotationally oscillate the mirror.

An object is to suppress vehicle body deformation in a side collision without sacrificing a vehicle interior space.

Provided is a first reinforcing member 10 disposed in a locker 12 at a vehicle lateral direction inner side, and a second reinforcing member 20 disposed in locker 12 at a vehicle lateral direction outer side, which opposes first reinforcing member 10 in a vehicle lateral direction, and which is provided with a side surface 20A and an end surface 20E (engaging portions) that engage with first reinforcing member 10 when locker 12 deforms. When locker 12 begins to deform due to a side collision to a vehicle 18, end surface 20E of second reinforcing member 20 contacts and engages flange 10E of first reinforcing member 10, and a torsional deformation can be suppressed, and side surface 20A contacts flange 10D, and a crushing deformation of locker 12 in a vehicle lateral direction can be suppressed. Since first reinforcing member 10 and second reinforcing member 20 are provided in locker 12, vehicle interior space is not sacrificed.

The invention provides a precise milling processing method with a variable inter-row allowance for thin walled blades of difficult-to-process materials; four driving curved surfaces are obtained by cutting a blade root boundary surface and a blade tip boundary surface into a blade back curved surface and a blade basin curved surface; parameter lines with equal u on the driving curved surfaces are used as processing paths; a cutting row allowance for each processing path is set respectively; and finally processing on the four driving curved surfaces are completed circularly. The invention facilitates the improvement of the blade cross section position accuracy, facilitates the improvement of the blade surface profile tolerance, and facilitates the reduction of the blade torsional deformation; when compared with traditional vertical cutting with a constant allowance and spiral milling methods, the invention can solve the technical problems of large torsional deformation, poor profile precision, difficultly-controlled cross section position accuracy error, and the like, and can realize the high-efficient precise numerical control processing of thin walled blades of difficult-to-process materials.

A device including a cover and a shaft inserted in the thickness of the front portion of the sole, and constituting a journalled system, adapted to ensure control of the flexural rigidity of a shoe, in particular a snowboard boot, or adapted to ensure the protection of the front surface of the shoe, partially or in its entirety. All of the elements forming the system can be removable. The journal which it determines provides the cover with a front-to-rear mobility which is presented, in closed position, against the front surface of the shoe. Connected to the latter by a retaining mechanism specific to the shoe, the cover offers, due to the properties and the shaping of its constituent materials, a resistance to the crushing and flexural and torsional deformation of the shoe in its front portion during use.

The invention discloses a fully decoupled three-degree-of-freedom parallel robot mechanism, which consists of a motion platform, a fixed platform and three fork chains connecting the two platforms, wherein two of the three fork chains have the same structure and each of the two fork chains consists of a hooke hinge, a rotary hinge, a moveable hinge and a connecting rod between the two fork chains from top to down; and the other fork chain consists of a spherical hinge, a rotary hinge, a moveable hinge and a connecting rod between the fork chains from top to down. The working platform of the mechanism of the invention can realize a one-translation two-rotation fully decoupled motion output; and the mechanism can effectively solve the problems of easy flexure and torsional deformation of the parallel mechanism caused by excessive freedom degrees of a motion pair and increase the whole load/weight ratio of the mechanism because the mechanism has few joints and only 13 freedom degrees of motion pair in total. In addition, a five-degree-of-freedom hybrid robot can be designed by connecting a two-degree-of-freedom rotary head with the motion platform in series and can be applied to complex curved surface machining and on other occasions.

The actuator has a movable mass portion and a pair of drive mechanisms for driving the movable mass portion. Each of the pair of drive mechanisms includes a drive mass portion, a support portion for supporting the drive mass portion, a first elastic connecting portion interconnecting the drive mass portion and the support portion so as to allow the drive mass portion to be pivoted about a pivotal axis with respect to the support portion, and a second elastic connecting portion interconnecting the drive mass portion and the movable mass portion so as to allow the movable mass portion to be pivoted about a pivotal axis with respect to the drive mass portion. The first elastic connecting portion includes a pair of bending bars opposed to each other with interposing the pivotal axis of the drive mass portion therebetween. The first elastic connecting portion includes a pair of piezoelectric elements jointed respectively onto the pair of bending bars so as to bend the pair of bending bars in opposite directions to cause pivotal movement to the drive mass portion. The pivotal movement of the drive mass portion causes torsional deformation to the second elastic connecting portion so as to pivot the movable mass portion.

The invention discloses a push-bending forming process for a hollow blade. The process comprises producing a mould cavity curved surface according to a finished product hollow blade appearance curved surface; machining a mould according to the mould cavity curved surface and forming a mould cavity passage with two open sides in the mould; designing a chuck according to the blade tenon shape; fixing the chuck and the mould on a hot press; coating high-temperature lubricants on the inner surface of the mould cavity and the surface of a blade blank; mounting the blade blank on the chuck. The hot press acts, the mould is closed, the chuck drives the blade to move towards the mould to push the blade into the mould cavity from one end of the mould cavity passage, and the blade is forced to be bent under the action of the mould cavity inner surface and is subjected to torsional deformation; the mould is opened after the torsional deformation is kept for certain time, and the formed blade is dismounted. According to the process, slab hollow blade blanks can be formed into complex torsional forms and are provided with required torsion angles, the forming process is stable and convenient and fast, the speed is controllable, deformation distribution of all parts are uniform, and the production efficiency is high.

The invention provides a pipeline inner wall bionic groove surface machining device and a machining method thereof. The device comprises a drive mechanism used for providing drive force, a traveling mechanism used for supporting the inner wall face of a pipeline, a machining mechanism used for machining a bionic groove in the inner wall of the machined pipeline, and a controller. The drive mechanism is installed on the traveling mechanism through bolts. The machining mechanism is fixedly connected with the traveling mechanism through bolts. The drive mechanism and the machining mechanism are electrically connected with corresponding control ends of the controller. The method comprises the steps that according to the diameter of the pipeline needing to be machined, a front and back traveling unit is adjusted in a rotating manner, after the machining mechanism is moved to the position, to be machined, on the inner wall of the pipeline, the traveling unit stops moving and presses the inner wall of the pipeline, the cutter position of the machining mechanism is adjusted, and the groove in the inner wall of the pipeline begins to be machined. The device has the beneficial effects that tangential counter force borne by three tools in the cutting machining process can be offset, thus, bending deformation and torsional deformation are avoided, and meanwhile the device is high in precision, simple in structure and easy to operate.

A leading edge inflatable traction kite wherein the leading edge structure includes a plurality of spaced segments that are fabricated from a material with a higher elasticity, thus allowing for a greater amount of twisting and bending. The inflatable leading edge includes a series of elastically deformable segments disposed throughout the length thereof to facilitate selective torsional deformation of the leading edge and resulting overall angle of attack of the kite. These elastically deformable segments are preferably integrally formed as part of the leading edge support and are comprised of a material with a high elasticity, namely a higher elasticicity than the remaining leading edge segments. Providing elastically deformable segments of high elasticitity dispersed along the leading edge combined with regions of lower elasticity maximizes responsiveness and control by allowing leading edge deformation in response to user applied force, while the providing sufficient support to maintain kite stability.

The invention relates to a method for eliminating vibration noise in shaft torsional deformation test. The method comprises the following steps of: arranging reflecting gratings on a tested shaft at equal intervals along an axial direction; arranging a group of laser fiber sensors at a position over against each reflecting grating to constitute a test channel; arranging another completely the same group of laser fiber sensors at a position which is orthogonal to the first group of laser fiber sensors to constitute another test channel; synchronously acquiring two paths of original signals through double channels for performing empirical mode decomposition (EMD) to obtain each order of intrinsic mode function (IMF) comprising different types of information; performing correlation analysis on each order of IMF for the two paths of signals; extracting an IMF reflecting a specific load function; and performing weighted averaging on the IMF to obtain tested information, i.e., shaft torsional deformation. The method has the advantages of simple structure, low cost, high anti-jamming capacity and adaptability to severe environments. Measuring accuracy is increased greatly.

The invention relates to a shock absorbing support for a building. The three-dimensional shock absorbing support comprises a laminated rubber support and a basin type support, wherein a lower connecting board is arranged under the laminated rubber support; the basin type support is matched with the lower connecting board; an inner flange used for limiting the movement condition of the lower connecting board is arranged on the basin type support; and the lower connecting board is buckled in a basin type chamber of the basin type support. The shock absorbing support can release the horizontal deformation and the torsional deformation of a supported engineering structure, reduce the risks of damages caused by the deficiency of horizontal deformation capability and torsional deformation capability of a structural component and improve the shock resistant performance of the engineering structure.

The invention discloses a test device for testing creep of metal materials under a low stress. According to a traditional uni-axial creep test device, due to the fact that the strain resolution ratio is low, so that the creep test demand of the metal materials under the low stress cannot be met. The test device for testing the creep of the metal materials under the low stress is based on a pure torsional deformation principle, a sample to be tested is processed into a spiral-shaped sample, a certain temperature and a small loading are imposed, a non-contact type optical measuring system is used to test the elongation of a screw pitch of the sample with the increase of time, and therefore the creep property of the metal materials under the low stress is researched. The test device comprises a main rack, the non-contact optical measuring system, a sample fixture, an open-window type high-temperature furnace, a spiral sample, a fixed support component, a computer and a connecting wire. Low-stress creep data tested by the test device for testing the creep of the metal materials under the low stress can provide a reference for safety evaluation and life forecast of pipelines of a nuclear power plant and a heat-engine plant.

The invention discloses a parameterized blade part defect model reconstruction method based on point cloud. The method comprises the following steps: S1, measuring a blade body of a to-be-repaired blade part; s2, blade part molded line feature matching: performing registration calculation on the measurement point cloud data and the blade theoretical model point cloud data to obtain torsional deformation of a blade damage area, and performing registration transformation with a blade theoretical model to enable spatial positions of an actual to-be-repaired blade model and the theoretical model under a workpiece coordinate system to be consistent; and S3, extracting a blade part damage part model: acquiring section measurement data of an undamaged area of the blade, performing curve fitting on the measurement data, performing linear interpolation on a fitted curve towards the damage area direction of the model, and extracting a damage area model of the blade. According to the blade defectmodel reconstruction method provided by the invention, distortion and deformation of the blade model can be reproduced into the reconstructed blade model, and defect and wear parts are predicted andsubjected to high-precision modeling.

The invention relates to a conical surface mechanical sealing device, which is characterized in that: a mechanical sealing static ring 1 is provided with a conical surface a; a rotary ring 2 is provided with a conical surface b; the conical surface a and the conical surface b are paired to form a sealing surface; and the sealing surface is that the conical surface a and the conical surface b are directly contacted, or are separated by a micro gap. Compared with the conventional mechanical sealing device, the conical surface mechanical sealing device has the advantages of higher automatic centering property and higher capability of resisting the torsional deformation of a shaft section and the bending deformation of a main shaft of a unit due to two sealing rings. The conical surface mechanical sealing device is suitable for the shaft end sealing of various rotary machines.

The invention provides a shot peen forming method realizing torsional deformation of a high-rib integral panel. The method comprises steps as follows: step 1, the high-rib integral panel is clamped and fixed; step 2, force pointing to the inner side of skin (1) is applied to two ends of the high-rib integral panel, and force pointing to the outer side of the skin (1) is applied to the middle of the high-rib integral panel; step 3, a shot peening area (3) is determined on the high-rib integral panel, a first nozzle (4) performs shot peen on the outer side of the skin (1) in the shot peening area (3) along a preset shot peen track, and second nozzles (5) perform shot peen on each high rib (2). According to the shot peen forming method, the application of shot peen forming to the integral panel with high rids, thin walls and a torsional shape is broadened, so that the development of the shot peen forming technology is promoted, more space and choices are provided for design and manufacture of the integral panel of an aircraft in the future, and further increase of the integral design level of the aircraft becomes possible.

The invention discloses a torque measurement sensor based on the phase difference of photoelectric encoder signals. The torque measurement sensor comprises a shell; an elastic drive sleeve is mounted in the shell by use of a ball bearing; an elastic link is arranged in the middle part of the elastic drive sleeve; a photoelectric encoder sleeves each of the two ends of the elastic link, and the central angles of the two photoelectric encoders are equal; a mounting base is fixed on the top of the shell; a photoelectric sensor A and a photoelectric second B are fixed in the mounting base, and arranged in opposition to the two photoelectric encoders. The two photoelectric encoders are arranged at the two ends of the elastic link of the elastic drive sleeve and the two photoelectric sensors are used for obtaining square wave output signals when the encoders rotate, and then the measurement of the torsional deformation and torque of the elastic drive sleeve can be realized according to the phase difference of the square wave signals output by the two encoders. The torque measurement sensor based on the phase difference of the photoelectric encoder signals is used for solving the problem that the measurement accuracy of an existing torque sensor is prone to be effected by a magnetic field and an electric field; the torque measurement sensor is simple in measurement principle, high in anti-jamming capability, and capable of realizing high-dynamic and high-accuracy torque measurement of a drive mechanism.

The invention provides a thin-walled vane nine-point control variable-allowance milling method based on Newton interpolation. Modeling is carried out by utilizing a three-dimensional modeling software, and an auxiliary surface and a boundary surface are formed, so that a driving surface is determined by utilizing a section line lofting process. Cutter machining paths are generated according to the driving surface, and the machining allowance of each cutter position point on each machining path is determined by adopting a Newton interpolation method. Finally, vanes are cyclically processed according to symmetrical milling rules. Compared with a traditional longitudinal fixed-allowance cutting and spiral milling method, the thin-walled vane nine-point control variable-allowance milling method has the advantages that technical problems, such as large torsional deformation, low contour precision, poor section position tolerance and difficult error control, in the machining process can be solved; and by adopting a Newton interpolation process allowance fine adjustment method, surface quality can be more comprehensively controlled, and problems, such as large bending deformation, poor section position tolerance and low surface contour precision, in the machining process can be effectively solved.

The invention relates to a method for actively adjusting the length of a connecting rod in real time. The length of the connecting rod can be actively adjusted in real time according to a control instruction by additionally arranging an active adjusting device on the connecting rod. Therefore, the defects that a traditional connecting rod is fixed in length and cannot be adjusted are overcome. Theactive anti-side-rolling torsion bar system comprises a connecting rod, a torsion bar and a supporting base, a ball screw mechanism is arranged on the connecting rod, and the length of the connectingrod can be rapidly adjusted in real time according to a control instruction, so that the torsion bar generates torsional deformation, and then anti-side-rolling torque is actively provided for a vehicle body; active adjustment of the side rolling angle of the train body is achieved, the speed and safety of the train passing through a curve can be improved, and therefore the running speed of the train is increased.

The invention discloses a polyvinyl chloride mixture for wires and cables and a preparation method thereof. The mixture comprises 30-60 parts of polyvinyl chloride resin, 4-15 parts of nitrile-butadiene rubber, 17-60 parts of plasticizer, 0.5-3 parts of epoxy soybean oil, 5-20 parts of filler, 2-3 parts of stabilizer, 0.2-0.6 part of lubricant and 0.1-1 part of toner. The preparation method comprises the following steps: adding polyvinyl chloride resin, plasticizer, stabilizer, filler, epoxy soybean oil, lubricant and toner together into a high-speed mixer, evenly mixing to a certain temperature, adding nitrile-butadiene rubber into the high-speed mixer to carry out secondary mixing, evenly mixing, mixing in a cold mixer while sending the mixture into a preheated granulator, and extruding and granulating to obtain the required polyvinyl chloride mixture for wires and cables. The polyvinyl chloride mixture disclosed by the invention still has the characteristics of torsion resistance, high elastic resilience, friction resistance, torsional deformation resistance and strong torsional fracture performance at -40 DEG C, and also has the advantages of low cost and simple preparation technique.

A method of designing and manufacturing an acoustic sensor having a high degree of directivity is disclosed. The sensor includes a rotatable plate that is attached to a substrate with mounts. In one aspect the mounts are freely rotatable and the torque on the plate is measured using detectors disposed on springs that provide a resistance to rotation of the plate. In another aspect the plate is mounted to the substrate with mounts that torsionally deform during rotation of the plate. These detectors measure the torque on the plate according to the torsional deformation of the mounts. Methods of improving the signal to noise ratio of acoustic sensors having multiple detectors are also disclosed.

The invention relates to a torque sensor for calibrating screwing tools such as dynamometric keys or impact screw drivers. A torque sensor for calibrating screwing tools has an inner body defining an axis with respect to which a torque is to be measured. The inner body has a seat for engaugement of a screwing tool to be calibrated. An outer annular body is held stationary. This outer annular body is coaxial with the inner body and is connected therewith through radial webs of a first type and through radial webs of a second type. The first type webs have relatively large widths circumferentially but have relatively small axial dimensions. The second type webs are relatively narrow circumferentially but have relatively large axial dimensions. The torque sensor further comprises torsion measuring elements attached to said first type webs for measuring torsional deformation due to torques exerted on said inner body.