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146results about How to "Simple shape" patented technology

Electro-hydraulic servo valve for prestage independent type jet flow pipe

The invention relates to an electro-hydraulic servo valve for a prestage independent type jet flow pipe, which mainly solves the technical problems of the improvement of the manufacturability of the electro-hydraulic servo valve, and the like. The electro-hydraulic servo valve adopts the technical scheme that the prestage jet flow pipe is provided with a switching block; the bottom surface of the switching block is connected with a main valve; the top surface of the switching block is connected with a torque motor; a receptor is fixed in an installing hole of the middle part of the switching block; a position adjacent to the bottom surface of the switching block is provided with a left oil hole and a right oil hole; one end of the left oil hole and one end of the right oil hole are connected with a left guide hole and a right hole of the main valve respectively; and the other end of the left oil hole and the other end of the right oil hole are communicated with a left receiving hole and a right receiving hole of the receptor respectively. The electro-hydraulic servo valve for the prestage independent type jet flow pipe is suitable for various electro-hydraulic servo valves for the prestage jet flow pipe.
Owner:SHANGHAI HENGTUO HYDRAULIC CONTROL TECH

Micro-displacement positioning platform with three-stage amplifying mechanisms

ActiveCN106981316AHigh displacement amplification ratioEffective introductionInstrumental componentsThree stageFixed frame
The invention relates to a micro-displacement positioning platform with three-stage amplifying mechanisms. The micro-displacement positioning platform comprises a fixed frame, a displacement input platform, a motion input mechanism, two sets of first-grade lever mechanisms, two sets of second-grade lever mechanisms and a semi-axle amplifying mechanism; the two sets of first-grade lever mechanisms and the two sets of second-grade lever mechanisms are symmetrical; fulcrums of the first-grade lever mechanisms and the second-grade lever mechanisms are both in transmission connection with the fixed frame; two ends of the motion input mechanism are respectively connected with the fixed frame and the displacement input platform; input ends of the two sets of first-grade lever mechanisms are respectively in transmission connection with the displacement input platform, and output ends are respectively in transmission connection with input ends of the corresponding second-grade lever mechanisms; and the semi-axle amplifying mechanism is connected between the output ends of the two sets of second-grade lever mechanisms. The micro-displacement positioning platform depends on compound serial connection of two stages of lever mechanisms and one stage of bridge mechanisms to solve such problems as low displacement-amplification ratio and parasitic displacement in the prior art so as to realize wide-range precise positioning of a motion platform.
Owner:SHANGHAI UNIV OF ENG SCI

Wind turbine blade

A blade for a rotor of a wind turbine having a substantially horizontal rotor shaft is described. The rotor comprises a hub, from which the blade extends substantially in a radial direction when mounted to the hub. The blade comprises a profiled contour comprising a pressure side and a suction side as well as a leading edge and a trailing edge with a chord extending between the leading edge and the trailing edge, the profiled contour generating a lift when being impacted by an incident airflow, the profiled contour in the radial direction being divided into a root region with a substantially circular or elliptical profile closest to the hub, an airfoil region with a lift generating profile furthest away from the hub, and preferably a transition region between the root region and the airfoil region, the transition region having a profile gradually changing in the radial direction from the circular or elliptical profile of the root region to the lift generating profile of the airfoil region, wherein the airfoil region comprises at least a first longitudinal segment extending along at least 20% of a longitudinal extent of the airfoil region, the first longitudinal segment comprising a first base part having a leading edge and a trailing edge with a chord extending between the leading edge and the trailing edge. The first base part has an inner dimension that varies linearly in the radial direction of the blade in such a way that an induction factor of the first base part without flow altering devices at a rotor design point deviates from a target induction factor. The first longitudinal segment is provided with a number of first flow altering devices arranged so as to adjust the aerodynamic properties of the first longitudinal segment to substantially meet the target induction factor at the design point.
Owner:LM GLASSFIBER

Thrust bearing

The invention discloses an end thrust bearing for submersible motor in well, comprising a disk bearing support with a chucking lug and a concave spherical surface in the center of the bottom, a gap block consisting of a plurality of independent multipart bearing slide blocks, and a bearing disk fixed on the disk bearing support, wherein, the bearing disk is provided with a center hole, a limited post I with a groove I arranged on the inner circle edge, a limited post II with a groove II arranged on the outer circle edge, a positioning stud limiting the position of the multipart bearing slide block, and a spherical crown convex hall; the two surfaces of the multipart bearing slide block are smooth, and the big and small circular arc edges are provided with a flange. When the invention is installed, the big and the small circular arc edges are respectively embedded into the groove II and the groove I and then locked after being limited by the positioning stud, and each slide block is in a flexible and nondeciduous state. Therefore, the shape and the structure as well as the way of installation of the multipart bearing slide block are improved, the thickness of the multipart bearing slide block is greatly increased, the intensity and the surface finish quality are greatly improved, and the full contact of the multipart bearing with a trust disk is guaranteed. With good carrying capacity, abrasive resistance and simple structure, the friction plane is easy to be processed and the manufacturing accuracy is easy to be guaranteed.
Owner:GUANGDONG RUIRONG PUMP IND

Water turbine sleeve casting mould assembling box

The invention relates to a water turbine sleeve casting mould assembling box, comprising a sand box. Sand moulds are uniformly arranged in the sand box; a casting part is arranged in the sand box; the upper end of the casting part is provided with an annular casting head; an air outlet hole is arranged between the casting head and the upper end of the sand box; a sand core penetrates through the air outlet hole, the casting head and the casting part; the upper end of the sand core is arranged at the outside of the sand box; the lower end of the sand core passes through the casting part and is arranged in the sand box; a core tube is arranged in the sand core; the lower end of the sand core is provided with a horizontally placed side gate; a first flow gate is arranged between the side gate and the lower end of the casting part; one end of the side gate is provided with a vertically placed sprue gate; the upper end of the sprue gate is connected with a pouring cup penetrating through the sand box; the upper end of the pouring cup is arranged outside the sand box; and a plurality of second flow gates placed obliquely are arranged between the outer wall of the casting part and the sprue gate. The water turbine sleeve casting mould assembling box has the advantages of reasonable structure and convenience for modeling, and guarantees an internal circle machining face of a sleeve without casting flaw.
Owner:张年生

Multi-nozzle flow stabilizing and distributing device for strip continuous casting

The invention discloses a multi-nozzle flow stabilizing and distributing device for strip continuous casting. The device comprises a flow distributor arranged above a molten pool at the front end of a metal initial solidification interface; molten metal is poured into a cavity of the flow distributor through a submerged nozzle at the bottom of a group of tundishes; and after the flow distributionof the flow distributor, the molten metal enters the molten pool at the front end of the metal initial solidification interface. The cavity of the flow distributor is also communicated with a cavity of a flow stabilizer; the cavity of the flow stabilizer is located above the cavity of the flow distributor; the submerged nozzle is submerged in the molten metal in the cavity of the flow stabilizer;and the molten metal is poured into the cavity of the flow stabilizer through the submerged nozzle, and then enters the cavity of the flow distributor after the flow stabilization of the flow stabilizer. The device can improve the flow stability of the molten metal and reduce the influence of the stream impact of the molten metal turbulence on the continuous casting process, so that the temperature distribution of the molten metal is uniform, the casting quality of a metal strip is improved, and the demand for producing relatively wide and thin strip steel is met.
Owner:SHANGHAI UNIV

Preparation method of cadmium tungstate monocrystal nanoribbon

The invention discloses a preparation method of a cadmium tungstate monocrystal nanoribbon, wherein the cadmium tungstate nanoribbon with unique shape and better uniformity in dimensional distribution is prepared by taking a soluble cadmium salt and sodium tungstate as raw materials, a surfactant SDBS (Sodium Dodecyl Benzene Sulfonate) as an additive and water as a medium, and strictly regulating reaction temperature, addition amount of the surfactant SDBS and a solution pH value. The nenoribbon is small in width and good in shape, has a wolframine nomocrystal structure, and is 60-120nm in width, 1.2-2.5mum in length and 20nm in thickness. The preparation method disclosed by the invention has the advantages of easily obtainable raw materials, simple equipment, low energy consumption, short cycle, low preparation cost, high yield, and safety and reliability for operation; the product has the characteristics of unique shape and dimension, good technical repeatability and sable quality, is easy to prepare on a large scale, and can be widely applied to various fields of nanometer-device XCT (X-ray Transcission Computed Tomography) detectors, radioactive nucleus spectrum and radioactivity determining and nuclear medical instruments and the like.
Owner:XI'AN POLYTECHNIC UNIVERSITY

Lacing hole structure of turbine blade and loose lacing wire installation structure of the same turbine blade

The utility model discloses a lacing hole structure of turbine blades and a loose lacing wire installation structure of the same turbine blades. The lacing hole structure of turbine blades comprises a straight circular boss structure, the straight circular boss structure is disposed on the turbine blades, the axis of the straight circular boss structure is perpendicular to the normal of the blade-shaped cross section of the turbine blades and is tangentially parallel to the impeller, a pressure side and a suction side of the blades protrude from the straight circular boss structure, a lacing hole is formed in the middle of the straight circular boss structure, the axis of the lacing hole and the axis of the straight circular boss structure are in the same direction, two small boss structures are arranged at the two ends of the lacing hole, the two ends are on one side of the lacing hole near to the top of the blades, and pits are formed on the side of the lacing hole near to the top of the blades. The loose lacing wire and the lacing hole have two contact points, thereby effectively improving the damping capacity of the loose lacing wire structure, shorting the free segment length of the loose lacing wire, reducing the stress level of the loose lacing wire structure, enabling the loose lacing wire to use alloy steels with good damping effect to replace titanium alloys, and being capable of controlling the stress level of the loose lacing wire structure and improving the damping capacity of the loose lacing wire structure at the same time.
Owner:XI AN JIAOTONG UNIV

Rotor structure of Halbach motor and manufacturing method thereof

The invention provides a rotor structure of a Halbach motor. The rotor structure comprises N-pole magnetic steel, S-pole magnetic steel and a rotating shaft, wherein the N-pole magnetic steel comprises N-pole large magnetic steel and N-pole small magnetic steel; S-pole magnetic steel comprises S-pole large magnetic steel and S-pole small magnetic steel; and specific limitation is as follows: the magnetic force line inside the N-pole small magnetic steel is parallel to the diagonal line of the radial section of the N-pole small magnetic steel or has an acute angle included angle, and the magnetic force line inside the S-pole small magnetic steel is parallel to the diagonal line of the radial section of the S-pole small magnetic steel or has an acute angle included angle. The invention alsoprovides a manufacturing method of the rotor structure of the Halbach motor. The rotor structure has the advantages that a permanent magnet forming a magnetic group is simple in structural shape and low in processing difficulty; the installation operation is simple and convenient, the motor production efficiency is high, and the homogeneity of product is improved; the structure of the magnetic group is limited, the accumulative error during assembling can be eliminated, and the motor performance is improved; the cross area of the permanent magnet is larger, and a magnetic circuit inside the permanent magnet is longer, so that the demagnetizing resistance of the motor is promoted.
Owner:NO 21 RESERCH INST OF CHINA ELECTRONICS TECH GRP
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