1376 results about "Axial symmetry" patented technology

The present invention is to provide a CVD apparatus having a high productivity, involving less contamination on the back surface of a substrate and having a high yield. A CVD apparatus for forming a thin film is characterized in that the interior of the vessel is divided into a upper portion and a lower portion (transfer chamber) by a support member for holding the ring chuck and the upper portion is further divide by inner wall into a deposition chamber and an exhaust chamber in axial symmetry around the same central axis. The deposition chamber communicated to the exhaust chamber through a gap between the inner wall and the ring chuck and/or holes provided in the inner wall. The transfer chamber is communicated to the deposition chamber or exhaust chamber through a gap formed between the ring chuck and the support member.

The flow conditioner for a gas transport pipe comprises at least one perforated plate disposed essentially perpendicularly to the axis XX' of the pipe and comprising a central hole and sets of additional holes that are regularly distributed over at least three concentric rings centered on the axis of the pipe so as to define a perforated plate that is axially symmetrical. Within any one ring all of the circular holes are of the same diameter d1, d2, d3. On going away from the central hole and on passing from any one ring to an adjacent concentric ring, the diameter of the holes changes alternately in a reduction direction and in an increase direction. Each ring has a number of holes that is equal to or greater than six. The perforated plate is advantageously associated with a porous plate situated upstream from the perforated plate and parallel thereto.

A half-wave printed “patch” antenna includes, symmetrically with respect to a plane of symmetry of the antenna perpendicular to faces of the antenna, a dielectric substrate and two conductive layers on respective faces of the substrate. One face of the substrate includes a raised portion extending lengthwise of the plane of symmetry and one of the conductive layers extends over and along said raised portion. Consequently, the antenna has a small size, combined with a more open radiation diagram. The antenna includes only one raised portion for linear polarization, or two raised portions or a raised portion with axial symmetry for crossed polarizations.

The invention discloses propeller type surface contour error measurement instrument and method. The propeller type surface contour error measurement instrument is characterized in that a gantry structure is adopted, a left upright, a right upright and a top cross beam are arranged on a base, and a revolving spindle is arranged on a cross beam; the lower end of the revolving spindle is horizontally and fixedly connected with a measuring arm; a linear guiderail is arranged on the bottom surface of the measuring arm along the radial direction of the revolving plane of the measuring arm, a working platform capable of doing linear movement along the linear guiderail is arranged on the linear guiderail, and a displacement sensor is arranged on the working platform; and a Y-direction working platform and an X-direction working platform are arranged on the base in an overlapping, and the blade of a detected propeller is arranged in a positioning groove at the top surface of the X-direction working platform. The measuring device and the measuring method are established by adopting a cylindrical coordinate system according to the axial symmetry structure characteristics of the propeller blade. The measuring device and the measuring method are fast in data acquisition, have no objective errors of an operator, and are simple in follow-up error processing and analysis, and can be used for precision measurement on size parameters and geometric error parameters of large revolving parts.

In a rotor of a permanent magnet rotary electric machine, a bonding portion between each of segment shaped magnets and an outer circumference face of a rotor core is provided in axial symmetry with respect to the rotor axial center and has a bonding area equal to or larger than a half of a contact area between each of the segment shaped magnets and the outer circumference face of the rotor core; and a biasing force is applied to an outer circumference face of the segment shaped magnets by a ring.

A high frequency large flow 2D digital servo valve comprises a valve body, a mulitpolar AC servo motor, a moment amplifying mechanism, a valve plug and a valve sleeve, the output shaft of the mulitpolar AC servo motor is connected with the input end of the moment amplifying mechanism, the output end of the moment amplifying mechanism is fixedly connected with the front end of the valve plug, the valve sleeve is sealed in the valve body, the valve plug is rotationally installed in the valve sleeve, the left end of the valve plug, the valve sleeve and a back cover plate construct a sensitivity chamber, the surface of ledges of the valve plug in the sensitivity chamber is respectively provided with a high pressure hole and a low pressure hole which are arranged in axial symmetry, both the high pressure hole and the low pressure hole are of bow shape, the bowstring of the high pressure hole and that of the low pressure hole are parallel, the inner surface of the valve sleeve outside the sensitivity chamber is provided with a pair of spiral grooves in axial symmetry, one end of the pair of spiral grooves is communicated with the sensitivity chamber, and the other end thereof covers thearea between adjacent high pressure hole bowstring and low pressure hole bowstring. The invention has excellent dynamic response property, is suitable to work under state of large flow, and has simple structure, high precision and strong anti-pollution capacity.

A Multiple-Input Multiple-Output (MIMO) antenna on a substrate includes first and second antennas defined in axial symmetry, a coupling portion, and a grounding portion. The substrate includes a first surface and an opposite second surface. Each of the antennas includes a feeding portion, a radiating portion, and a matching portion. The feeding portion feeds electromagnetic signals to the antenna. The radiating portion radiates the electromagnetic signals, and is in a meandering “S” pattern. A length of the radiating portion is substantially equal to a quarter wavelength of the electromagnetic signals. The matching portion implements impedance matching between the feeding portion and the radiating portion. The coupling portion is located between the first antenna and the second antenna and is serpentine shape. A length of the coupling portion is substantially equal to a half wavelength of the electromagnetic signals. The grounding portion is located on both the first and second surface.

The invention relates to a multistage cyclone separation device of a dust collector, which comprises an upstream first-stage cyclone separation device (1), a downstream second-stage cyclone separation device (2) and a gas flow channel (3), wherein the gas flow channel (3) is used for connecting the upstream first-stage cyclone separation device (1) and the downstream second-stage cyclone separation device (2), the downstream second-stage cyclone separation device (2) comprises a cyclone filter (5), a dust-gas separation cover (6) and a central cylinder (8), at least two tangential air inlets are arranged on the cylindrical later surface of a cyclone cylinder body (20), an exhaust pipe (504) is positioned on the cylindrical top surface of the cyclone cylinder body (20), and the tangential air inlets have equal cross sectional area, are positioned on the same horizontal surface and are arranged relatively to the central shaft of the cyclone cylinder body (20) according to equal phase difference. The invention has the advantages that the short-circuit flow of the exhaust pipe is less than that of a single-gas inlet cyclone separation device, the axial symmetry of a flow field is more excellent, and the proportion that small-granule dust directly enters an exhaust port without cyclone separation after entering a separation chamber is reduced.

The invention belongs to a processing control method for axial symmetrical free curved surfaces of a non-spherical optical element, relates to a non-spherical optical element, and provides a processing control method for axial symmetrical free curved surfaces of a non-spherical optical element and capable of improving the surface precision of the free curved surfaces and a device thereof. The device is provided with a workbench, a laser interferometer, a micro feeding mechanism, a grating scale, a tool post, a rotary encoder, a turning tool, a rotary platform, a main shaft and a controller. The method comprises the following steps: connecting the turning tool and the grating scale, mounting the rotary encoder and the laser interferometer on the workbench, and positioning the turning tool by adjusting and controlling the grating scale and the rotary encoder; calculating control models at a feeding speed; setting processing parameters and carrying out numerical control programming to generate a numerical control processing code and a compensation processing program of each shaft; processing the optical element according to the numerical control processing code; using the interferometer to measure work pieces on line, processing and fitting data for measurement results, and finishing processing if the surface precision requirement is accorded; and returning to the compensation processing program if the surface precision requirement is not accorded.

The invention relates to a disc type iron-core-free PMDC motor. The disc type iron-core-free PMDC motor comprises a middle stator and rotors which are installed on a spindle and in disc shapes, disc surfaces are arranged parallelly and correspondingly, gap flux densities on two sides of the stator are the same, the stator comprises an iron-core-free rolled annular winding which is placed axially, and a magnetic line of force passes gaps and the winding axially; and each rotor is a disc composed of a magnetic conducting disc for accommodating magnetic steel and an aluminum case, a permanent magnet is bonded on the magnetic conducting disc in an N and S alternating mode, and polarities of magnetic steel corresponding to the rotors up and down are opposite. The disc type iron-core-free PMDC motor is characterized in that the annular winding is an axial symmetry conical ring composed of a plurality of sections of arcs, the central axis points to the axis of the stator, and the tip of the conical ring is close to the axis of the stator. The magneto-electricity conversion efficiency of the motor is improved by above 10%.

A diaphragm for use in speakers in which a center dome is provided with a plurality of ribs in one of axial symmetry and non-axial symmetry patterns, for thereby dispersing the divisional resonance occurring in the center dome during the vibration and lowering the sound pressure specifically in higher sound range frequency characteristics, as well as a speaker comprising the particular diaphragm, are provided.

The invention discloses a tapered plug mechanism realizing the axial symmetry spray pipe all-direction vector regulation. The tapered plug mechanism comprises a tapered plug front section, a tapered plug back section, a support frame, an actuator cylinder, a rotating rod, a connecting rod and an actuator cylinder, wherein the tapered plug front section and the tapered plug back section form a center taper structure, the sectional surfaces in the contact positions of the tapered plug front section and the tapered plug back section are concentric spherical surfaces, the tapered plug front section and the tapered plug back section are connected through a rotating pair vertical to the axial line of a spray pipe, in addition, the concentric spherical surfaces of the tapered plug front section and the tapered plug back section passed by the rotating pair are connected for realizing the vector regulation of the fuel gas flow of the spray pipe, meanwhile, the shielding effect on front end heat end components can be realized, the support frame is used as a support component of the center taper structure formed by the tapered plug front section and the tapered plug back section for connecting the center taper onto a tube body of the spray pipe, and the center taper realizes the vector rotation in an all-direction 360-degree range. The tapered plug mechanism has the advantages that the structure is simple, the moving components are few, the outline dimension of the traditional axial symmetry plug type spray pipe can be effectively reduced, and the all-direction vector regulation of the axial symmetry spray pipe can be realized.

The invention relates to a monolithic molding method of a light duty truck weldless axle case. A weldless steel round pipe is used, first, early hole shrinkage is conducted to two ends of the weldless steel round pipe, two times of hydro-bugling are conducted to the middle of the weldless steel round pipe; and then, later stage hole shrinkage is conducted to the two ends of the weldless steel round pipe to obtain a performing pipe blank which is in an axial symmetry shape or close to an axial symmetry shape. A die left pressure head and a die right pressure head are used on a four-way hydraulic machine for sealing the ends of the performing pipe blank, liquid is injected into the four-way hydraulic machine, an upper die block, a lower die block, a front die block and a rear die block are used for integral pressing and forming on the performing pipe blank from the upper direction, the lower direction, the front direction and the rear direction, an axle case semi-finished product with a hemispherical rear oil cap and an additional front cap is obtained, and an axle case product is obtained by cutting the additional front cap. According to the monolithic molding method, the manufactured axle case is weldless, high in strength and stiffness, and high in material utilization rate. Comparing the used technique with a traditional hydro-bugling technique, the liquid pressure needed in manufacturing process is lowered by more than 60%, and the tonnage of forming devices is lowered by more than 50%.

The invention discloses a resonance micro chemical accelerometer, which comprises a basic plate, a weigh block, a suspend beam, a lever amplifying device, a sound fork, a driving electrode, a detecting electrode, a tooth axle and a backstop. Wherein, said structure is axial symmetry; the weight block is circle whose middle part is mounted with a suspend beam, a lever amplifying device, a sound fork, a driving electrode, a detecting electrode, a tooth axle and a backstop; the backstop is outside the weight block; the circle shape of weight block can make the element own larger weight block in limited volume; the resonance beam has two ends to be fixed with sound forks, while two ends are connected to the outer element with narrow necks, to effectively reduce the energy couple between the resonance beam and outer structure; two symmetry sound forks can realize differential output of resonance frequency. The invention can improve the sensitivity, resolution and detecting accuracy of accelerometer.

The invention provides a rotary shear failure performance determination test device of an asphalt mixture and belongs to the technical field of mechanical property testing of the asphalt mixture. The rotary shear failure performance determination test device is composed of a testing platform, a loading system and a computer control system, wherein the loading system is used for carrying out rotary shearing loading on an asphalt mixture test piece according to a set shearing speed; the computer control system collects data information in real time; and a rotary shearing method is adopted to test a shear failure performance of the asphalt mixture. The rotary shear failure performance determination test device disclosed by the invention has the advantages that (1) a rotation torque acting on the test piece with an axially-symmetrical section only generates pure shearing deformation and a simple pure shearing stress state can be obtained, so as to be convenient for testing and controlling the maximum shearing stress and strain; (2) due to an axial symmetry property, the testing accuracy can be improved in theory; and (3) testing equipment and a testing process of rotary loading occupy a small testing space; and compared with pulling and pressing deformation, the rotary shearing deformation (angle displacement) can be infinitely great in theory and is basically not limited by the testing space, so that the rotary shear failure performance determination test device is particularly suitable for materials with great plastic failure deformation.

The invention discloses a focused ultrasonic-wave point treatment device, comprising a host machine and a treatment gun. The treatment gun is connected with the host machine through a connecting cable; an ultrasonic transducer that can generate focused ultrasonic-waves is arranged inside the treatment gun; an acoustic-field controlling unit that leads the ultrasonic transducer to generate a non-axial symmetry acoustic field is included inside the treatment gun. The focused ultrasonic-wave point treatment device is a noninvasive treatment device, effectively increases the therapeutic safety, and achieves the same curative effect with the traditional acupuncture.

The invention relates to a double-lens and optical-magnification-expansion zoom-lens camera. The camera comprises a fast-mounting base, an annular connecting part and a universal spherical shell component, wherein the universal spherical shell component comprises a first electric zoom lens, a second electric zoom lens, a first image sensor plate, a second image sensor plate, a network coding processing mainboard, an infrared lamp circuit board and a universal spherical shell sleeve; the first electric zoom lens is mounted on the first image sensor plate, the second electric zoom lens is mounted on the second image sensor plate, the first electric zoom lens is arranged right above the second electric zoom lens, the first electric zoom lens and the second electric zoom lens are in axial symmetry, the first image sensor plate and the second image sensor plate are connected to the network coding processing mainboard through cables, and the infrared lamp circuit board is connected to the network coding processing mainboard through a cable; the fast-mounting base is fixed on a ceiling or a wall, the universal spherical shell component is placed into the annular connecting part, and the annular connecting part is fixed to the fast-mounting base. The invention further discloses a working method of the double-lens and optical-magnification-expansion zoom-lens camera.

The invention discloses an equilateral polygon discal MEMS resonant gyro which comprises a sensitive structure, wherein the sensitive structure includes a harmonic oscillator, fixed anchor points forfixing the entire harmonic oscillator are arranged in the center of the harmonic oscillator, the harmonic oscillator takes the shape of an equilateral polygon disc which is in axial symmetry entirely,the harmonic oscillator includes a plurality of concentric equilateral polygon resonant rings, the concentric equilateral polygon resonant rings are connected through spokes, the fixed anchor pointsare connected with adjacent concentric equilateral polygon resonant rings through the spokes, the plurality of concentric equilateral polygon resonant rings are radially distributed by taking centersof the fixed anchor points as centers, grooves are formed between adjacent equilateral polygon resonant rings and spokes, and electrodes are arranged in the grooves. The equilateral polygon structuresare entirely in line connection without arc line, thereby having a small edge error effect and a relatively smaller symmetry error. Therefore, the resonant frequency of two operating modes are smallin splitting.

The invention discloses an axial symmetry DC magnetic bias simulation model for an extra-high voltage transformer, which belongs to the technical field of safe operation of electrical equipment in an extra-high voltage AC network. Through establishment of an equivalent axial symmetry simulation model of an actual three-dimensional model of the extra-high voltage transformer, a complicated magnetic field model is equivalent to a simple two-dimensional magnetic field model and dynamic inductance parameters are obtained; a load DC magnetic bias circuit model of the extra-high voltage transformer is established; current parameters are obtained through a four-order Runge-Kutta method; a time domain field-circuit coupling method is adopted to realize rapid calculation of the load DC magnetic bias of the extra-high voltage transformer; the simulation proves the high precision and high efficiency of analysis of DC magnetic bias through the extra-high voltage transformer to bring convenience to a large amount of researches on a DC magnetic bias problem of the transformer and help to safe and stable operation of the transformer.

The invention discloses a thread weld integral slit type cold head of the coxial vessle refrigerator in the refrigeration technology field, including an upper cold head, a lower cold head, a cold end baffle and a copper wire, wherein the upper cold head and the lower cold head are welded again after the threaded connection, the cold baffle is arranged at the middle of the cold head integer, and the cold baffle is filled with the copper wire, wherein the lower cold head is divided into a base seat and a boss having the uniformly distributed slots in the axial symmetry. The depth of the slot is the same with the height of the boss, and the external thread is arranged at the cirumferential of the base seat; a cylinder is arranged on the upper cold head, a round hole at the center and radial slots in the distributed uniformly arranged at the cirumferential of the round hole. The width of the slot is consistent with the slot of the lower cold head; the internal thread structure of the upper cold head is matched with the external thread of the lower cold head, with the other end in the thread match with the cold accumulator, and is left with the margin for welding after being matched. The invention has large heat exchange area, and the welding structure ensures the leak detection safety of the pressure gas the welding reliability.

A laser oscillator that can suppress astigmatism and achieve an axially symmetric laser beam output profile even when a spherical mirror is inserted between an output mirror and a rear mirror. Turning mirrors (plane mirrors) and spherical mirrors are arranged between the output mirror and the rear mirror so as to provide a zigzag round-trip optical path where the optical axes cross in the same plane. This configuration achieves the same effect as if lenses were arranged between the ends of a very long resonator, and the light-gathering performance of the laser beam may be controlled by the output mirror, the rear mirror and the curvatures of the respective turning mirrors. The positions and orientations of the spherical mirrors are determined so that the planes formed by the optical axis of the incident laser beam and the optical axis of the reflected laser beam on the respective spherical mirrors are perpendicular to each other, thereby offsetting the astigmatism and preventing the axial symmetry of the output laser beam profile from degrading. The angle of incidence of the laser beam axis on each spherical mirror may be set to 22.5 degrees or larger. Further, the turning mirrors may be replaced by a slab crystal.