227 results about "Coaxial cylinder" patented technology

A multiple beam antenna system is described. The system may include a mounting structure, a first wireless access antenna, a second wireless access antenna, and a radio frequency lens. The first and second wireless access antennas may be mounted to the mounting structure. Columns of radiating elements of the first and second wireless access antennas may be aligned with the radio frequency lens. The radio frequency lens may be modular in a longitudinal or radial direction, or in both directions. The radio frequency lens may include a plurality of compartments arranged to form a first cylinder made up of concentric, coaxial cylinders and a plurality of dielectric materials in at least some of the plurality of compartments.

A three-way two-position poppet valve (10) comprising a housing (12) with a generally cylindrical valve chamber (14), a first (20) and a second (16) port with coaxial 1 valve seats (26, 28) at the ends of the chamber, and a third lateral working port (18). A poppet body (36) is disposed reciprocably in the valve chamber so that in a first position of the poppet body the first valve seat (26) is sealed and the second port communicates with the working port, and in a second position the second valve seat (28) is sealed and the first port communicates with the working port. The valve is characterized in that the housing has two coaxial cylindrical passages (24, 30) adjacent the respective valve seats, while the poppet body has two coaxial cylinder parts (44, 48) slidingly and sealingly fitting the cylindrical passages, so that the poppet body is always supported in at least one of the cylindrical passages and fluid communication between the first and the second port is always prevented.

A hollow mutual reactor belongs to reactor devices, and solves the problem that a coupling coefficient of the prior hollow mutual reactor is small. The invention provides a first form comprising mutually independent three-phase reactors, wherein, each phase reactor consists of coupling coils, a patching panel and a supporting insulator; the coupling coils consist of an inside coil and an outside coil with leads in opposite winding directions; a hollow coaxial cylinder is formed by winding; the outside coil winds outside the inside coil; and the inter-turn and the interlayer of the inside and the outside coils are all insulated. The invention further provides a second form comprising mutually independent three-phase reactors, wherein, each phase reactor consists of coupling coils, a patching panel and a supporting insulator. In each phase reactor, two or more coupling coils with different inside diameters are nested in turn with each other from inside to outside to form nesting coils, and the layers of the coupling coils are insulated and have air gaps for heat dissipation. The hollow mutual reactor has the advantages of low noise, good linearity, high mechanical strength, great stability margin, high coupling degree between arms of the mutual reactor, and small leakage reactance.

The invention belongs to the field of high-voltage DC solid insulation material surface charge accumulation and surface flashover measurement, and particularly relates to a DC GIL disc insulator surface charge density measurement and observation platform, which is characterized in that two insulators separate a sealed metal cavity into three cavity rooms; the cavity room at the left side is connected with an external casing via a flange; a charge measurement device inside the cavity room above the right side is located above a coaxial cylindrical structure test device, a turning mechanism is fixed on the wall of the metal cavity, the coaxial cylindrical structure test device is connected with the turning mechanism via the support, a quartz window is arranged at the top of the cavity room, and a high-speed camera support and a high-speed camera are arranged outside the cover plate of the top flange; and each of the three cavity rooms is respectively provided with a valve with a barometer. The design is easy to realize, the operation is simple, and a reliable and effective test platform is provided for doing research on correlated characteristics between the disc insulator surface charge accumulation and surface flashover in the DC GIL.

A multi band antenna feed, for supporting multiple frequency bands, is coupled to a reflector and includes a cylindrical core waveguide and at least three coaxial cylinders, encircling said cylindrical core waveguide and forming at least three coaxial waveguides, bounded between pairs of consecutive coaxial cylinders. The cylindrical core waveguide and the at least three coaxial waveguides provide a pair of sum and difference radiation patterns, for each frequency band: a C-band, an S-band and an L-band.

The invention provides a dual-band stacking medium loading spiral antenna, comprising two coaxial cylinder bodies with the upper part and the lower part stacked together; the sections of the bottom surface and the bottom part of the two cylinder bodies are provided with metal layers respectively, and the top ends thereof are respectively provided with four metal sheets with different lengths; one end of each metal sheet respectively extends radially from the center of the cylinder body to the circumference of the top surface and then to the metal layer axially in the spiral path from the surface of the metal sheet; the opposite surfaces of two adjacent metal sheets of the upper cylinder bodies are connected as two groups of antennas; the four metal sheets of the upper cylinder body and the lower cylinder body are respectively connected on the top end surface of the lower cylinder body; the dual-band stacking medium loading spiral antenna also comprises a cable which is embedded inside the through hole of the axle center and comprises an insulation body; the surface of the insulation body is covered by a conductive shield layer and the center thereof is provided with a feed-in needle; two ends of the feed-in needle extend out of the through hole; the top end of the conductive shield layer is connected with a group of the antennas of the upper cylinder body; the top end of the feed-in needle is connected with the other group of antennas of the upper cylinder body; the metal layers of the bottom surfaces of the upper cylinder body and the lower cylinder body respectively contact with the horizontal corresponding sections of the conductive shield layer. The antenna of the invention has small dimension and good performance.

An apparatus having transmitter and receiver antennas is provided for measuring conductivity of an earth formation surrounding a borehole. The apparatus utilizes an initial model to invert induction measurements of the earth formation to provide a conductivity model that includes a plurality of coaxial cylinders.

The invention belongs to nondestructive detection technologies of structures of composite material, and the like, and relates to a probe and an ultrasonic scanning method for detecting an inner cavity of a whole structure of the composite material. The probe comprises an acoustic unit and a scanner, wherein the acoustic unit is positioned in coaxial cylindrical through-holes in middle positions of an upper clamping block and a lower clamping block in the scanner and keeps being in clearance fit with the coaxial cylindrical through-holes. The ultrasonic scanning method comprises the steps that the acoustical unit is placed on the upper clamping block in the scanner and connected with an external ultrasonic detection instrument; a water supply hose is connected with an external water supply loop; water enters from a straight hole of the lower clamping block, is conveyed to a circular groove and then flows along a fine slit between a coupling cavity jacket and the wall of the inner hole of the lower clamping block to the surface of a detected closed vertical wall, so as to form an acoustic wave coupling water film on the surface of the vertical wall; and ultrasonic waves are vertically transmitted to and received by the vertical wall of the closed inner cavity of the detected whole structure through the acoustic unit. By using the ultrasonic scanning method, the ultrasonic scanning stability of the vertical wall of the closed inner cavity is greatly improved and the reliability of a detection result is remarkably increased.

The invention discloses a coaxial cavity dual-band filter based on a stepped impedance structure. The filter provided by the invention is formed by coupling of several stepped impedance coaxial cavity resonator units. Each stepped impedance coaxial cavity resonator unit is composed of three parts, namely two rod-shaped solid metallic conductors, a tubular metallic wall and a filler. The filler is air and is positioned in a resonant cavity between the tubular metallic wall and the rod-shaped solid metallic conductors. The upper and lower ends of the tubular metallic wall are provided with outer cover plates for sealing the resonant cavity. The several stepped impedance coaxial cavity resonator units are arranged in a linear parallel structure. The two rod-shaped solid metallic conductors are two coaxial cylinders with different diameters and are divided into a lower conductor cylinder and an upper conductor cylinder. The two conductor cylinders are connected in series up and down. The lower conductor cylinder is electrically connected with a feeder line of an input or output port. According to the invention, two passbands are realized by the stepped impedance coaxial cavity resonator units; passband frequency ratio adjustable range is large; the size of the filter is small; and the structure of the filter is simple and reasonable.

The invention provides a ground lead current signal monitoring sensor for an end screen of transformer bushing. The ground lead current signal monitoring sensor comprises a conducting rod 1, a pedestal 2, a bottom waterproof sealing ring 3, a coil 4, a coil 5, a coil 6, a housing 7, a waterproof cap 8, a conductive disk 9, a top waterproof sealing ring 10, a BNC contact 11, a BNC contact 12, and a BNC contact 13, wherein the coil 4, the coil 5 and the coil 6 sleeve the conducting rod 1 side by side, and shares the housing 7; the conducting rod 1 is cylindrical; the housing 7 is cylinder-shaped; the conducting rod 1 and the housing 7 form a coaxial cylinder structure; and the pedestal 2 is a cylinder, and the pedestal 2 and the conducting rod 1 forms a coaxial cylinder structure. The ground lead current signal monitoring sensor for an end screen of transformer bushing can transmit high frequency signals in the 1MHz-40MHz scope without distortion, and is small in volume and high in adaptability.

The invention relates to a drill bit with a low chisel edge. The drill bit comprises a handle portion and a head portion, wherein the handle portion is a cylinder, the head portion is a coaxial cylinder which shares the same axis with the handle portion, two chip discharge grooves are formed in the head portion, a solid portion forming the chip discharge grooves is a knife back, intersecting lines of the two chip discharge grooves and the knife back in the axis direction respectively form two main cutting edges, intersecting lines of the two chip discharge grooves and the knife back in the radial direction form seamed edges, the seamed edges and the main cutting edges intersect to form a knife point, the chisel edge with 140-degree convexity is arranged between the two main cutting edges, and a sharp point of the chisel edge is 0.5-1mm lower than the knife point in the axis direction. Due to the chisel edge with the 140-degree convexity, knife strength is guaranteed, and meanwhile prominent centring capacity is guaranteed; the powerful centring capacity can inhibit bouncing and thereby guarantees long service life of a knife; and the drill bit is suitable for drilling machining for carbon fiber composite materials used for aviation.

The invention discloses a method for scribing integral cylinder block blanks of large diesel engines. A plurality of groups of coaxial cylinder liner blank holes and gland blank holes are formed in each cylinder block blank. The method is characterized in that three-dimensional space scribing tasks are completed in a two-dimensional scribing mode on the premise that machining allowance is guaranteed, and center lines of various cylinder liner holes and gland holes and position lines of reference end surfaces of the various cylinder liner holes and the gland holes can be scribed by the aid of two scribing positions of each cylinder block blank on a scribing platform, and meet dimensional requirements. The method is combined with an existing scribing technology, so that stereoscopic scribing operation can be implemented on each cylinder block at the two corresponding scribing positions by the aid of conventional scribing tools, effects of reducing the production cost and preventing safety and quality accidents can be realized, and the method has the advantages of simplicity and convenience in operation and high scribing precision, and is applicable to scribing operation on optional integral cylinder blocks and similar large castings.

The invention discloses an axial-flow swept blade. The surface of the axial-flow swept blade comprises a suction curved surface, a pressure curved surface, an upper curved surface and a lower curved surface, wherein the upper curved surface and the lower curved surface are covered with side surfaces of two cylinders, and the radii of the cylinders corresponding to the upper curved surface and the lower curved surface are recorded as R2 and R1 respectively, and R2 is larger than R1; the side surfaces of a series of coaxial cylinders formed by changing the radius r from R1 to R2 intersect with the axial-flow blade to form a series of intersection planes, the series of the intersection planes are spread along the plane, a series of spread sections are obtained, and a spatial stacking line of the blade is obtained accordingly; the projection line of the spatial stacking line in a YOZ plane is a cubic spline curve with the change of the height ratio. The problems of lower efficiency and large noise of an axial-flow fan can be effectively solved by means of improvement of key shape parameters.

The invention relates to a positive-negative chamfering drilling bit used for processing of plate parts. The positive-negative chamfering drilling bit used for the processing of the plate parts comprises a handle portion, a neck portion and a head portion, the head portion, the neck portion and the handle portion are coaxial cylinder bodies taking the same central axis as the center, scrap discharge grooves are arranged on the head portion and the neck portion, an entity portion except the scrape discharge grooves is a tool back, a main cutting edge, a negative cutting edge and a positive cutting edge are respectively arranged at positions of the head end face, the middle and the tail end face of the scrape discharge grooves, the main cutting edge is used for drilling the plate parts by drilling a hole, the positive cutting edge processes the an inlet chamfer of a through hole during feeding for the first time, and after the inlet chamfer is processed, the tool is retracted to the position of the negative chamfer edge to mill an outlet chamfer of the through hole out. The positive-negative chamfering drilling bit used for the processing of the plate parts achieves composite processing of drilling, chamfering and negative-chamfering.

The invention discloses a correction method for rheological test data of a coaxial cylinder rheometer. The correction method specifically comprises the following steps: putting a sample to be tested into a coaxial cylinder rheometer test system; carrying out a test under a set mode, and acquiring data; introducing an angle acceleration correction item for shear stress to calculate real shear stress at the boundary of a corrected coaxial cylinder measurement clamp and apparent viscosity of a corrected material. The correction method has the beneficial effects that by introducing a torque correction item and considering torque consumption of a system inertia (a motor rotor inertia and a measurement clamp inertia), deviations of the rheological data acquired by the conventional rheometer can be corrected, and the rheological property of a medium to be tested can be recognized more accurately.

The invention discloses a combined ozonization-air flotation integrated device. The device comprises a coaxial cylinder, a middle cylinder and a central cylinder. The cylinder and the central cylinder share the bottom. The cylinder and the middle cylinder share the top. The middle cylinder is arranged on support channel steel between the cylinder and the central cylinder. The top of the central cylinder is located in the middle cylinder. The top of the central cylinder is open. The upper part of the cylinder is provided with a drainage pipe. The top of the cylinder is provided with an inner cylinder exhaust pipe and a slag discharging pipe. The upper part of the middle cylinder is provided with an outer cylinder exhaust pipe. The lower part of the central cylinder is connected to a water inlet pipe, a gas-containing water inlet pipe and a connection inner cylinder emptying dredge pipe. An annular aeration pipe with an aeration inner thread head is arranged in the lower part between the cylinder and the middle cylinder. The annular aeration pipe is connected to an air inlet pipe. The lower part of the cylinder is connected to a connection outer cylinder emptying dredge pipe. The device has a three layer structure, realizes partitioning ozonation, air floatation separation and automatic slagging and has the advantages of fast installation, simple operation and high treatment efficiency.

A variable-displacement piston-cylinder device may be adapted for providing work output, and/or for pumping or compressing fluids. The piston-cylinder device defines two or more coaxial cylindrical expansion chambers between a piston having two or more coaxial and conjoined piston members, and a correspondingly-shaped cylinder. Substantially any combination of the expansion chambers may be activated or deactivated in order to vary the effective displacement of the piston-cylinder device. The effective displacement of each piston-cylinder may be changed in mid-operation in order to reduce power output and fuel consumption (or pumping or compressing capacity), without introducing vibration. In addition, a control system is provided for managing the effective displacement of each piston-cylinder according to output required, desirable operating parameters, and other parameters that can effect the operation of the device.

The invention discloses a tangential introducing spiral-flow type gas-liquid mixing efficient atomization nozzle which comprises a feeding chamber, a spiral flow chamber and a spray head. The feeding chamber is composed of two layers of coaxial cylinders. A cavity formed by the inner cylinder is a gas channel, and a cavity formed by the outer cylinder is a liquid channel. The feeding chamber and the spiral flow chamber are connected through a flange body. The spiral flow chamber is composed of a spiral flow cavity and four flow guide bodies. The spiral flow chamber is connected with the spray head, the interior of the spray head is divided into a contraction section, a throat and an expansion section, the contraction section communicates with the spiral flow cavity, a gradually contraction hole outlet of a conical gas spray device is right opposite to an annular groove in the inner wall of the contraction section of the spray head, and the atomization effect can be improved. The middle of the contraction section is provided with a vibration leaf spring. The two ends of the throat are in smooth connection with the contraction section and the expansion section correspondingly. Liquid is introduced into the spiral flow chamber to be accelerated and then mixed with accelerated gas in the conical gas spray device for atomization, atomized liquid droplet particles are cut and scattered through the vibration leaf spring, atomization is intensified, liquid is sprayed out from the expansion section of the nozzle, and the contact area is increased.

The invention belongs to the technical field of pulse power, relates to a pulse-forming line with a reentry structure and aims at reducing the axial length of the pulse-forming line. The pulse-forming line comprises three parts, namely a reentry forming line segment, a switching segment and a load segment. Three coaxial cylinders and an insulating medium of the reentry forming line segment form two pulse-forming lines; in other words, an outer line and an inner line are equal in electrical length and wave impedance; the matching impedance of the load is equal to the sum of the impedances of the outer line and the inner line. The pulse-forming line with the reentry structure has the beneficial effect that the output pulse width of the pulse-forming line with the reentry structure adopted is twice the output pulse width of a traditional pulse-forming line under the condition of the same axial length.

The invention discloses an auger bit with a highly-spiral land. The auger bit comprises a head, a stem and a neck between the head and the stem. The head, the neck and the stem are a coaxial cylinder using the same central axis as the center. The front end of the head is provided with a first tool nose and a second tool nose which are used for drilling. The first tool nose and the second tool nose peripherally spirally extends by using the central axis as axis. A first chip groove and a second chip groove are formed between the first tool nose and the second tool nose. A first main cutting edge for drilling is disposed on the first tool nose. A second main cutting edge for drilling is disposed on the second tool nose. The auger bit further comprises a tool back and the highly-spiral land, wherein the highly-spiral land is independent of the first chip groove and the second chip groove and disposed in the middle of the tool back. Due to the fact that the highly-spiral land is independent of the chip grooves, the spiral angle of the land is increased, the length of the land is increased, and stability of the bit during machining is increased.

The invention discloses a rock breaking speed-increasing tool with a hammer rod reciprocating self-impact structure. The rock breaking speed-increasing tool comprises a connector, a drill bit body anda valve-type impactor; the connector is connected with the drill bit body to form an inner cavity; the inner cavity comprises a main cavity body, a cylindrical liquid inlet channel in the upper portion of the main cavity body, and a coaxial cylindrical piston cavity in the lower portion of the main cavity body, wherein the bottom face diameter of the coaxial cylindrical piston cavity is greater than that of the liquid inlet channel; a valve seat with the variable cross section is arranged between the liquid inlet channel and the piston cavity; the lower portion of the drill bit body is provided with a hammer rod slideway; the valve-type impactor is arranged in the main cavity body and comprises the valve seat, a piston punch hammer and a spring; and the piston punch hammer conduct reciprocating movement under the effect of the spring and hydraulic power. By cooperating with a drill bit, the rock breaking mechanism of local impact assisting scraping is achieved, the purpose of rock breaking speed-increasing is achieved, the structure is simple, the multiple reciprocating self-impact structures can be designed simultaneously, the multiple hammer rods can further be designed simultaneously, and the rock breaking efficiency of impact assisting scraping is further improved.