42results about How to "Improve centrality" patented technology

The invention provides a high-speed automatic tool changing electrical spindle cooling structure, wherein, a spindle is fixed at an integrated casing by a front bearing support and a back bearing support; a cooling fan is installed at the back end of the casing; the inner wall of the casing is provided with a convex shoulder type spigot; the back end of the back bearing support is provided with a flange which props against the spigot and is fixed at the casing; the front bearing support, the back bearing support and a position of the flange at a tool changing cylinder corresponding to reinforcement beams arranged at the casing are provided with screw holes and are fixed with the casing by bolts; and a gap is arranged between the adjacent reinforcement beams to form a penetration type axial air course. The electrical spindle cooling structure is provided with the axial air course between the casing, the bearing supports and the cylinder, thereby improving the air cooling performance of the electrical spindle; a fixed structure is more reasonable; the centre aligning performance of the electrical spindle is higher; and the electrical spindle cooling structure ensures that the electrical spindle used in wood numerical control machining center bears stable cutting force and keeps high dynamic balance during machining. The electrical spindle does not require arranging a lateral air course at the casing and ensures that the structure is compacter and nicer.

The invention relates to a polyethylene having a melt flow rate at (2.16) kg loading (MFR2), determined according to method ISO1133-1:2011, which MFR2 is A g / 10 min and A1≤A≤A2; wherein A1 is (0.5) and A2 is (1.70), and containing a total amount of vinyl groups which is B vinyl groups per (1000) carbon atoms, and B1≤B, wherein B1 is (0.45), determined according to method ASTM D6248-98, a polymer composition, an article being e.g. a cable, e.g. a power cable, and processes for producing a polyethylene, a polymer composition and an article, and an article; useful in different end applications, such as wire and cable (W&C) applications.

The invention belongs to the technical field of utilizing the solar energy to make wind power and utilizing the wind power to generate electricity, in particular to a solar energy wind power generation tower which solves the problems that the existing solar generating equipment has high cost and low utilization rat and the utilization rate of the wind energy generating equipment has low utilization rate. The solar energy wind power generation tower comprises a thermal-arrest tower and a convection tower; the thermal-arrest tower is internally provided with a gas ascending passage; the outer side of the sunny slope of the gas ascending passage is provided with a double-layer transparent glass and the bottom of the inner side is provided with an absorbing coat; the highest point of the gas ascending passage is communicated with atmosphere; the convection tower is internally provided with a gas descending passage, the bottom of the gas descending passage is provided with a wind turbine, and the top of the gas descending passage is provided with a cold air inlet; the lowest point of the gas ascending passage is communicated with the lowest point of the gas descending passage; the output end of the wind turbine is connected with the input end of a generator. The invention finds a new channel for developing pollution free new energy with low cost, big, middle and small-sized solar power generation and small and middle-sized wind power generation by depending on crude natural conditions.

The invention discloses a forming process of a rear triangular pipe fitting and a claw hook of a composite material frame. The forming process comprises the following steps of: firstly, performing various parts of a rear triangular pipe fitting and a claw hook of a frame with a carbon fiber composite material; splicing; filling yarn; and arranging in a die to finish a frame by integral forming. The new forming process of a rear triangular structure of a carbon fiber bicycle frame is adopted to ensure the integrity of the rear triangle of a composite material bicycle so as to enhance the strength of the rear triangle of the composite material bicycle, the tire position, the accuracy of the claw hook, the accuracy from the center of the rear claw hook to a five-way joint or a brake hole of a rear upper fork while enhancing the stability of the rear triangle, saving the cost of raw materials to the maximum extend and improving the utilization rate of raw materials. The invention has the advantages and the efficacy of enhancing the strength of the bicycle rear triangle, improving the size accuracy from the claw hook to the five-way joint or the brake hole of the rear upper fork and the centrality of the claw hook, decreasing the cost of raw materials, improving the utilization rate of the raw materials, having simple structure by the integral forming technology, reducing the steps needed by a manufacture process, shortening the time consumption, and the like.

The invention discloses a mechanically driven continuous impact pressure wave generator and a pipeline abnormal state detection device based on it, which belongs to the technical field of pipeline detection. , the plunger rod connector, and the piston sleeve are on the same axis, so the operation is stable and the device has a long service life; driven by the spring force and the motor, the plunger can quickly hit the diaphragm with the linear movement of the plunger rod in the piston sleeve , using the deformation of the diaphragm to generate pulsed pressure fluctuations, and then propagate along the pipeline; the diaphragm isolates the fluid in the flow pipe from the gas in the piston sleeve, and still has a good sealing function under high pressure. The new structural method of using the motor to provide mechanical energy, spring and flywheel to store energy enables the overall equipment to generate continuous pressure waves; the overall device is positioned by the main body fixing frame, the device is compact in space, easy to carry, easy to operate, and has high man-machine friendliness Sex; simple structure, good sealing, stable operation.

The invention provides a high-speed automatic tool changing electrical spindle cooling structure, wherein, a spindle is fixed at an integrated casing by a front bearing support and a back bearing support; a cooling fan is installed at the back end of the casing; the inner wall of the casing is provided with a convex shoulder type spigot; the back end of the back bearing support is provided with aflange which props against the spigot and is fixed at the casing; the front bearing support, the back bearing support and a position of the flange at a tool changing cylinder corresponding to reinforcement beams arranged at the casing are provided with screw holes and are fixed with the casing by bolts; and a gap is arranged between the adjacent reinforcement beams to form a penetration type axial air course. The electrical spindle cooling structure is provided with the axial air course between the casing, the bearing supports and the cylinder, thereby improving the air cooling performance ofthe electrical spindle; a fixed structure is more reasonable; the centre aligning performance of the electrical spindle is higher; and the electrical spindle cooling structure ensures that the electrical spindle used in wood numerical control machining center bears stable cutting force and keeps high dynamic balance during machining. The electrical spindle does not require arranging a lateral aircourse at the casing and ensures that the structure is compacter and nicer.

The invention relates to a telescopic shaft positioning and pressing type device pin bilateral cutting device, comprising two symmetrically distributed telescopic shafts, a limit base body for carrying a device, a pressing block and two supporting wing blocks; the telescopic shaft is fixed on the limit base body On the upper part, the pressing shaft faces the groove in the limit base body, the pressing block is located between the telescopic shaft and the limit base body groove, and is used for pressing the device to be cut. Advantages: The device has low manufacturing cost and easy operation. At the same time, it selectively presses some pins of the device to ensure that the root of the component pins is not torqued during cutting, and can realize cutting multiple devices at one time, which is suitable for ceramic packaged devices. Fast loading and unloading of components is achieved through elastic telescopic shafts. The grooves limit the length of the device pins, and are also the basis for supporting and clamping the pins and protecting the vulnerable parts of the pins. The wing blocks on both sides of the base body are used to ensure overall stability, and the positions of the wing blocks can be replaced, so as to conform to the cutting operation of the left and right hands or cutting tools.

Provided is an entry sheet for drilling that, compared with a conventional entry sheet for drilling, has better hole position accuracy, can suppress drill bit breakage, and exhibits less processing chips wrapping around the drill bit. This entry sheet for drilling includes a metallic support foil and a layer comprising a resin composition that is formed on at least one surface of the metallic support foil, wherein the resin composition contains a cellulose derivative (A) and a water-soluble resin (B), the cellulose derivative (A) includes a hydroxyalkyl cellulose and / or a carboxyalkyl cellulose having a weight average molecular weight of 20,000 to 350,000, and based on 100 parts by mass of the resin composition, the content of the cellulose derivative (A) is 5 to 40 parts by mass and the content of the water-soluble resin (B) is 60 to 95 parts by mass.

The invention discloses a device and method for measuring the focusing constant g of a self-focusing optical fiber. The measuring device comprises an optical fiber preprocessing device and an optical fiber refractive index measuring device. Cover glass is arranged in the center of a hole in the bottom of a sample cavity through gel, the sample cavity is cleaned, and the matching solution is injected in the sample cavity till the sample cavity is full of the matching solution. A bare optical fiber is arranged in an optical fiber clamp, and the bare optical fiber is clamped in a clamping frame after being cut and polished. The optical fiber is pushed till the end face of the optical fiber makes contact with the cover glass. An automatic alignment and one-dimensional linear scanning mode is set in a computer, and a refractive index distribution skeleton map is rapidly obtained. According to the refractive index distribution skeleton map detected by the measuring device, the refractive index data in a fiber core are extracted, and the measurement on the focusing constant g and the center refractive index n0 of the self-focusing optical fiber is achieved through the curve fitting algorithm.

The invention discloses an intelligent reading and writing device and method for RFID (Radio Frequency Identification). Simultaneous reading and writing for low-frequency, high-frequency and ultrahigh-frequency RFID tags are achieved through using the intelligent reading and writing device for RFID and the method applied to the device. In addition, the simultaneous reading and writing range can beadjusted according to actual requirements. Furthermore, the intelligent reading and writing device is provided with a communication module, thereby enabling multiple devices to operate in a networking manner. The intelligent reading and writing device can also be combined with a status indicator lamp of production and manufacturing equipment, thereby reducing the purchasing cost, achieving the coordination, concentration and stability of work and reducing the maintenance cost.

The invention provides a loudspeaker, which includes a speaker frame, the mouth of which is provided with a pilot frequency line passing the center of the mouth. The pilot frequency line includes threThe invention provides a loudspeaker, which includes a speaker frame, the mouth of which is provided with a pilot frequency line passing the center of the mouth. The pilot frequency line includes three helical sections sequentially connected on the same plane. The three helical sections are all of the structure of a flat spiral line and are further respectively arranged in a bass area, a mediant ae helical sections sequentially connected on the same plane. The three helical sections are all of the structure of a flat spiral line and are further respectively arranged in a bass area, a mediant area and a high pitch area of the mouth. The invention also provides a sound box, in which the loudspeaker of the proposal is arranged. By connecting the pilot frequency line in the loudspeaker, the inrea and a high pitch area of the mouth. The invention also provides a sound box, in which the loudspeaker of the proposal is arranged. By connecting the pilot frequency line in the loudspeaker, the invention realizes the effect of causing the high pitch, mediant and bass of music out from the loudspeaker to respectively have a convergence point on the pilot frequency line and improves the tone quavention realizes the effect of causing the high pitch, mediant and bass of music out from the loudspeaker to respectively have a convergence point on the pilot frequency line and improves the tone quality of the loudspeaker. Besides, through the arrangement of the loudspeaker in the sound box, the invention realizes the sound concentration of outside played music of the sound box and improves thelity of the loudspeaker. Besides, through the arrangement of the loudspeaker in the sound box, the invention realizes the sound concentration of outside played music of the sound box and improves thetone quality of the sound box.tone quality of the sound box.

The invention discloses a method for improving the wool on the knife face of a rigid-flex board, which comprises the following steps: covering the knife face of at least part of the recessed area in the rigid-flex board with a film-coated aluminum sheet; The pressure towards the blade surface of the rigid-flex board, so that the coated aluminum sheet and the side wall of the concave area on the blade-facing surface of the rigid-flex board are completely attached; The recessed area is drilled to obtain a forming hole in the recessed area of ​​the rigid-flex board; after the drilling of the rigid-flex board is completed, the coated aluminum sheet is removed. In the present invention, the gap between the film-coated aluminum sheet and the rigid-flex board is completely bonded to the side wall of the recessed area of ​​the rigid-flex board, thereby preventing hairs from accumulating between the rigid-flex board and the film. The situation between the aluminum sheets, and the hairs are taken out of the rigid-flex board and the coated aluminum sheet after drilling, thereby improving the quality of the rigid-flex board after drilling.

The invention relates to a sewage processor with multi-stage treatment function, which comprises a processor end cover and a processor, a vertical shaft sliding vertically on the processor end cover, a planetary gear train is arranged inside the processor, the vertical shaft passes through and treats The upper gear and the sun gear in the planetary gear system, which are rotatably connected by the end cover of the device, extend downward; the inner rings of the two gears are all threaded with the vertical shaft, and the outer ring of the ring gear of the planetary gear system is threaded with a shaft sleeve, and the shaft sleeve The lower part is connected with blades; the upper part of the processor has a plurality of through holes distributed around the circumference and the outside is provided with a blocking ring that can slide vertically, the blocking ring matches the through hole, and the upper end of the vertical shaft is connected with the blocking ring through a string; The sliding speed of the circular plate determines the discharge time of the suspended solids, and realizes the precise control of the suspended solids discharge; the blades stir in the clear water at a low speed, so that the suspended solids on the surface of the clear water slowly move around, realizing a large concentration of suspended solids; the concentrated suspended solids It flows out at a certain time, and has the characteristics of large amount of sewage discharge and good sewage discharge effect.

The invention discloses a foam treatment device for an aeration tank, which comprises a floating ring, a plastic diaphragm and an annular shell, the floating ring is fixedly connected to the upper end of the plastic diaphragm, the annular shell is fixedly connected to the lower end of the plastic diaphragm, the plastic The two sides of the diaphragm are symmetrically provided with grid sleeves, the two sides of the annular shell are symmetrically opened with openings, and the openings are connected with flow pipes, and the openings communicate with the grid sleeves through the flow pipes. A partition is arranged on the inner wall, and a first rotating shaft is rotatably connected above the partition, and a turbine is fixedly sleeved on the first rotating shaft. The turbine of the present invention rotates to guide the water flow, and a vortex will be formed inside the plastic diaphragm, and the foam around the device will flow to the vortex, and then realize the concentration effect on the foam, and even be guided into the grid sleeve, and the grid sleeve will collect it. Block the foam or sludge, so as to achieve the effect of foam treatment on the surface of sewage.