35results about How to "Structural process optimization" patented technology

The invention discloses a flexible Rogowski coil used for detecting the direct-current system short-circuit current and a method for designing the same, the coil comprises a coil and a loop uniformly wound around an annular flexible framework with an opening, an outer layer insulating bush is sleeved outside the coil and the loop, a plug-type interface attached to the coil and the loop is installed on the opening of the annular flexible framework, the coil outgoing line is connected with a sampling resistance module after being educed through the hole of the plug-type interface, the sampling resistance module educes a signal and is connected with a post-integrating circuit. In the Rogowski coil loop winding technique adopted in the invention, the return wire and the coil winding are constituted by one wire. The head end and the tip end of the Rogowski coil are connected by the plug-type interface, which can improve the mechanical life of the Rogowski coil to a great extent, has the advantages of high reliability and convenience for disassembly and installation; the method for designing the Rogowski coil used for detecting the direct-current system short-circuit current can combine the short circuit physical circumstances and the field working condition of the direct-current system.

The invention relates to a multi-functional built-in dynamic-static-pressure motorized spindle for an efficient high-speed precision machine. The multi-functional built-in moving piezo spindle comprises a shell, a spindle body, a bearing, an oil sealing cover, a motor rotor and a stator. A front bearing is arranged at the right end of the shell and forms a static-pressure push bearing with the spindle. The inner surface of the front bearing is provided with a static-pressure oil cavity, and part of the large diameter of the inner surface matches with a pre-tightening piston. A rear bearing is mounted in a rear-bearing seat. The motor rotor is arranged between the front bearing and the rear bearing. The outer cylindrical face of the motor stator matches with a water sleeve tightly. The water sleeve matches with a hole in the middle of the shell and is connected to the shell. The rear bearing is sealed through a gas sealing ring, and the front bearing is sealed through the oil sealing cover and a gas sealing hole at the rear end. Heat shielding devices are arranged at two ends of the motor stator. The spindle can be mounted at different positions according to different using conditions. The multi-functional built-in dynamic-static-pressure motorized spindle can serve as a spindle of a grinding wheel of a precision machine, a milling center or a grinding machine or a spindle of a workpiece, and has the advantages of high precision, high rigidity, long service life, fine producing process, good sealing effect and the like.

The invention provides a preparation method of a NiTi fiber reinforced intermetallic compound-based laminar composite material for vibration and noise reduction. The preparation method comprises the steps of polishing Ti foils, Al foils and NiTi alloy fibers by use of abrasive paper to remove oxide layers, next, cleaning by use of an ultrasonic cleaner and then cleaning by use of alcohol, drying, stacking by the unit of Ti foil-Al foil-NiTi fibers-Al foil-Ti foil with the Ti foils as the outmost layers, and putting the entire stacked material in a vacuum hot pressing furnace for sintering. The prepared fiber reinforced laminar composite material is highly damped (the loss modulus can be 3500MPa under the conditions of a temperature ranging from a room temperature to 50 DEG C and 1Hz, and the loss modulus can be 4100MPa under the conditions of the same temperature range and 20Hz) and has high strength (the compressive strength can be 1400MPa), and therefore, the prepared fiber reinforced laminar composite material is a high-performance structure-function integrated composite material.

The invention relates to a vacuum-tube type solar air collector. The vacuum-tube type solar air collector mainly comprises an all-glass vacuum tube, a heat collecting core and a case body, wherein the heat collecting core is installed inside the vacuum tube, a vane exposed out of the heat collecting core extends into the case body, and two ends of the case body are provided with openings for ventilation. In the working process, the sunlight penetrates through the vacuum tube, the heat collecting core is heated through the vacuum tube, the heat is transmitted to the radiating fin through the heat collecting core, the heat on the fin surface is taken away through the ventilation in the case body, and the air is heated. The solar air collector is simple in design and manufacturing process, mature and reliable in technology, low in cost and capable of being used in a large scale and in an integration mode. The contiguous integration of collectors can be achieved in accordance with requirements.

The invention relates to the field of an inverse uninterruptable power supply (UPS), in particular to the realization of the isolation technology of alternating current and direct current of the double inverse uninterruptable power supply. The method and circuit for realizing isolation of alternating current and direct current of the double inverse uninterruptable power supply is used for carrying out electrical isolation on the alternating inverse circuit with alternating current input and the direct inverse circuit with current circuit input, wherein the alternating input power supply (1221) passes through the rectifying circuit (121) and an alternating current inverter (122), is sent to the first primary winding (P1) of an output isolation transformer (T5) and is output via the secondary winding (S) of the output isolation transformer (T5) in a coupled manner to constitute an alternating inverse channel; the direct current input power supply (2221) passes through an inverted device (221) and a direct current inverter (222), is sent to the second winding (P2) of the output isolation transformer (T5) and is output via the secondary winding (S) of the output isolation transformer (T5) to constitute the direct current inverse channel.

The invention relates to the field of optics, and discloses a double-cavity etalon. The double-cavity etalon comprises a fixing cavity, a tuning cavity and a micro-control system, wherein the tuning cavity and the fixing cavity have consistent penetrated peaks, and the micro-control system is connected with the tuning cavity and slightly regulates the penetrated peak of the tuning cavity. According to the double-cavity etalon, the combination of the fixed cavity and the tuning cavity is adopted; through the slight tuning of the micro-control system, two single-cavity etalons forming the double-cavity etalon have the strictly consistent penetrated peaks, and the double-cavity etalon has flat top type penetrated peaks with high degree of finish so as to be suitable for wavelength locking in a laser. The structure is simple and convenient in process and is easy to achieve.

The invention discloses a multifunctional electrocardio lead special wire and a manufacturing method thereof. The multifunctional electrocardio lead special wire comprises an electrocardio conductor formed by twisting a tin-copper foil wire conductor and a silver-plated copper foil wire conductor, and an FEP insulating layer is arranged on the outer surface of the electrocardio conductor to form an electrocardio inductor. The outer surface of the electrocardio inductor is sequentially coated with a conductive layer of an ethylene carbon resin component, a braided shielding layer of a tinned copper component and an outer sheath of an FEP component. One end of the five-core shielding lead wire is crimped with a human body connecting terminal, the other end of the five-core shielding lead wire is connected with the tail end of one core wire of the five-core shielding lead wire through the chip circuit board, and a series circuit of a gas discharger and a chip resistor in the chip circuitboard is insulated and shielded. The other end of the five-core shielding lead wire is connected with a plug used for electrocardiogram equipment, and magnetic ring anti-interference processing is adopted. The special wire has the advantages of bending resistance, tension resistance, high temperature resistance, good defibrillation effect, strong electrostatic protection, good shielding effect andthe like, is not interfered by the outside when transmitting physiological signals of a patient, and is accurate in signal transmission.

The invention provides a branched polymer and a preparation method thereof, solves the problem of crosslinking in the existing branched polyaryletherketone (sulfone) preparation process, and realizes unification of high branching degree and high molecular weight of branched polyaryletherketone (sulfone). The structural formula of the polymer is shown as a formula (I) or a formula (II). The invention also provides a foam material prepared by taking the polymer as matrix resin, and the foaming mode is supercritical carbon dioxide foaming.

The invention discloses a large-buried-depth tunnel top vertical shaft backfilling load-reducing structure and a construction method thereof. The structure comprises a protection pipe which is arranged in a vertical shaft, wherein the top end of the protection pipe extends out of the vertical shaft, and a bottom sealing layer and a plurality of filling layers are arranged in the protection pipe; foldable supports are arranged between the adjacent filling layers, a base, a locking opening supporting beam and an outer wrapping layer are arranged outside the vertical shaft, and the parts, extending out of the vertical shaft, of the locking opening supporting beam and the protection pipe are located in the outer wrapping layer; and a soil sealing layer is arranged on the outer wrapping layer. A plurality of sections of steel protection cylinders are hoisted into the vertical shaft to form the protection pipe, the base is poured, the locking opening supporting beam is erected, the outer wrapping layer is poured, drainage blind pipes are densely arranged, and a secondary lining is poured; concrete is pumped into the protection pipe, the bottom sealing layer is formed through vibration and compaction, the bottom sealing layer is alternately provided with the filling layers and the foldable supports until the top surfaces of the finally-formed filling layers are flush with the top surface of the protection pipe, and a well top sealing plate is welded to the top surface of the protection pipe; and the soil sealing layer is piled on the outer wrapping layer, and the large-buried-depth tunnel top vertical shaft backfilling load-reducing structure is built. The load-reducing structure can effectively protect the safety of an underlying tunnel, and the technical blank is filled up.

The invention discloses a preparation method of a polyethylene film without coating fragments. The preparation method comprises the following steps: preparing a polyethylene film; carrying out two-dimensional stretching after carrying out conventional stretching; coating the film with a first coating, sputtering the film with a second coating, and cleaning residual coating fragments by using multiple processes after coating shedding inspection, thereby ensuring that no coating fragment remains on the film, and enhancing the safety of a lithium battery film.

A connector disclosed by the present invention comprises a socket and a tongue piece assembly inserted in the socket, the tongue piece assembly comprises a main tongue piece and an auxiliary tongue piece inserted in the main tongue piece, the socket is internally provided with a socket inner slot, the main tongue piece is detachably inserted in the socket inner slot, and the auxiliary tongue piece is detachably inserted in the socket inner slot. The inner wall of the socket inner slot is provided with an elastic lock catch, and the elastic lock catch is used for locking the tongue piece assembly in the socket inner slot. The connector has the advantages of simple structure, few assembly steps, simple assembly process and the like, the assembly time can be effectively saved, the assembly efficiency can be improved, the labor cost and the labor intensity can be reduced during actual implementation, the structural stability and reliability of the product are higher, and the service life of the product is longer.

A hydraulic hammer, comprising a housing (2); an impact mass (3) equipped with a guide rod (4) reciprocatingly moving; a hydraulic cylinder (6) for moving the impact mass (3), which is fixed on the housing ( In 2), the piston (7) with the connecting rod (8) forms a connecting rod cavity (9) in the direction of the pile (1) in the hydraulic cylinder (6), and the other side forms a piston cavity (10). The connecting rod (8) is connected with the impact mass (3), the pump (11) with the overflow pipe (13) and the pressurizing pipe (12) which is connected with the connecting rod cavity ( 9) are connected, and also include two double-position valves (14, 15), which are used to connect with the piston chamber (10) of the hydraulic hammer (6) through the pressurizing pipe (12) or overflow pipe (13); each Valve parts (17, 26) are made into an oil cylinder form, arranged and sealed in the housing of the valve, and its outer diameter is close to the diameter of the contact surface of the valve. Wherein the chamber at the front end of the valve part communicates with the chamber at the rear end of the valve part facing the valve seat.

The invention discloses a high-temperature insulating layer for an engine blade film sensor and a preparation method of the high-temperature insulating layer. The high-temperature insulating layer comprises a blade substrate layer, a high-temperature oxide layer, an Al2O3 film layer, a Ta2O5 film layer and a Si3N4 film layer which are sequentially arranged from bottom to top. The preparation method comprises the steps of vacuum heat treatment and high-temperature oxidation, preparation of the Al2O3 film layer, preparation of the Ta2O5 film layer, preparation of the Si3N4 film layer and high-temperature heat treatment. The high-temperature insulating layer is compact in film, few in defect and capable of reducing leakage current caused by film defects at high temperature, and the preparation method is simple, easy to implement and low in cost.