50results about How to "Reduce air gap" patented technology

The invention discloses a multilayer circuit board preparation method and system based on via hole filling optimization and a multilayer circuit board, and relates to the technical field of circuit board preparation, and the method comprises the steps: obtaining the size of a via hole, calculating the depth-to-width ratio, constructing a viscosity gradient function, taking a via hole filling quality evaluation index as a first optimization target, and solving an optimal ratio; designing a vacuum degree control strategy; the current capillary pressure is obtained, differential pressure driving force is calculated according to the current through hole gas pressure intensity, the time needed for filling and the preset ultrasonic vibration duration are calculated in combination with the through hole diameter, the hole depth and the viscosity gradient function, and ultrasonic auxiliary filling is carried out while through hole filling is carried out; filling the via hole, and controlling the vacuum degree according to the vacuum degree adjusting curve; and the real-time filling rate and the cavity volume are obtained, a second target function is constructed with the difference between the minimum target filling rate and the actual filling rate and the filling cost as a second optimization target, and the optimal filling step number and the optimal single injection material volume are solved.

The invention relates to a miniature transformer suitable for a low-power-consumption charger and a rapid assembling method of the miniature transformer. The miniature transformer comprises a fixed iron core and a movable iron core which are arranged on a base, and an air gap is reserved between the fixed iron core and the movable iron core; a limiting seat positioned at one end of the framework is detachably mounted on the base; the movable iron core is positioned between the limiting seat and the framework; a plurality of bimetallic strips are mounted on one side, close to the limiting seat, of the framework, and the bimetallic strips are configured to control the air gap to be increased during temperature rise; a plurality of shape memory alloy springs are arranged between the limiting seat and the movable iron core, and the shape memory alloy springs are configured to be converted into an austenite phase and softened when the temperature rise exceeds the phase change temperature of the shape memory alloy springs; and when the temperature is reduced to the phase transition temperature, the shape memory alloy spring is converted into a martensite phase and recovers elasticity to drive the movable iron core to be far away from the limiting seat, so that the air gap is reduced. According to the invention, the air gap is automatically adjusted along with the temperature rise, and the temperature rise is controlled, so that the electromagnetic efficiency in different load states is ensured.

The invention provides a small-air-gap vacuum circuit breaker rapid permanent magnet operating mechanism and a switching-on and switching-off method, and belongs to the field of medium and low voltage vacuum circuit breakers. The mechanism comprises a guide rod, a permanent magnet, an inner static iron core, an outer static iron core, an opening spring, a coil and a movable iron core, wherein the outer side wall of the movable iron core is provided with an axial groove. By reducing the air gap between the movable iron core and the static iron core, the magnetic resistance in the switching-on process is effectively reduced, so that the switching-on response time is shortened, and switching-on is accelerated.

The invention discloses an angle deflection structure with tooth poles and a deflection mirror device thereof, the angle deflection structure comprises a rotor assembly and a stator assembly, the rotor assembly is composed of a rotating shaft and at least two permanent magnets with adjacent staggered poles, and the stator assembly comprises a stator ring, two first tooth poles and two second tooth poles. The first tooth poles and the second tooth poles are evenly arranged in the stator ring at intervals in a pairwise opposite mode, the two ends of the oppositely-arranged first tooth poles in the length direction are provided with insulating wire frames, and coil windings are wound around the insulating wire frames and suspended on the outer sides of the permanent magnets. On the basis of four poles, the first tooth poles and the second tooth poles are arranged outside the permanent magnets, so that magnetic field lines can be better gathered and guided, the influence of the tooth poles on the torque output smoothness of the rotating shaft can be reduced as much as possible, air gaps around the permanent magnets are reduced to about 0.3 mm, and the torque output smoothness of the rotating shaft is improved. Therefore, the same performance as that of the existing structure can be achieved by using a weaker magnet and fewer coils.

The utility model relates to the technical field of switching devices, in particular to a double-coil monostable relay, which comprises a contact, a reset spring and a coil part, and is characterized in that the coil part is used for selectively switching on and off to control the contact to be closed or broken; the coil part comprises a pull-in coil and a breaking coil, the pull-in coil is used for overcoming the elastic force of the reset spring to drive the contact to be pulled in a power-on state and continuously electrifying to enable the contact to be kept in a pull-in state, and the breaking coil is used for being matched with the reset spring to drive the contact to be broken in the power-on state; therefore, monostable operation of the relay is formed and contact adhesion is prevented. According to the monostable relay, the breaking coil is arranged, and when the monostable relay is broken, the contact is driven to be broken under the combined action of the breaking coil and the reset spring, so that the driving force for breaking the contact is larger, contact adhesion can be prevented, safety accidents caused by contact adhesion are further reduced, and the working reliability and safety of the relay are improved.

The invention discloses a far ultraviolet micro-LED photocatalyst monolithic integrated chip and a preparation method of the far ultraviolet micro-LED photocatalyst monolithic integrated chip. According to the chip, an AlGaN-based micro-LED array with the emission peak position of 220-230 nm is adopted as a far ultraviolet light source, a conformal composite layer structure with optical shaping and photocatalysis dual functions is integrated on the light emitting face of the AlGaN-based micro-LED array in a monolithic mode, and a composite layer is composed of a high-transmittance framework layer and a porous catalytic skin layer; the catalytic skin layer conformally deposits a porous membrane with the thickness of 50-300 nm on the surface of the lens, the aperture is 10-200 nm, the porosity is 20-60%, and degradation of organic pollutants and inactivation of microorganisms in air are achieved under the wave band of 220-230 nm. And a transition layer with the thickness of 50-200 nm is arranged between the light emitting surface of the chip and the composite layer, so that the adhesive force is improved and the thermal stress is relieved. The device is compact in structure, low in energy consumption, free of mercury, environmentally friendly and suitable for the fields of far ultraviolet disinfection, air purification, healthy illumination in closed space and the like.

The application discloses a rotor for a fluid pump, comprising at least one bearing, a magnetic conducting ring located radially outside the at least one bearing, a rotor support which is injection molded and integrally fixed with the at least one bearing and the magnetic conducting ring, a plurality of permanent magnets located at the outer periphery of the magnetic conducting ring, and a protective shell sleeved at the outer periphery of the plurality of permanent magnets, wherein the rotor support comprises a cylindrical main body and a plurality of retaining portions which are circumferentially spaced around the main body, the main body is injection molded between the at least one bearing and the magnetic conducting ring, the magnetic conducting ring is radially located between the main body and the plurality of retaining portions, the plurality of permanent magnets are respectively retained in the space between adjacent retaining portions, and the thickness of the protective shell is less than 0.8 mm, so that the air gap between the stator and the rotor is effectively reduced, and the motor power density is improved.

The invention discloses an efficient ultrasonic disinfection tank for surgical instruments, and relates to the technical field of medical instrument disinfection, the efficient ultrasonic disinfection tank comprises a disinfection tank body, a fixing assembly is arranged at the bottom of the disinfection tank body, and a transfer assembly is arranged in the fixing assembly; when the ultrasonic transducer is used, after the mounting plate and the ultrasonic transducer body are taken down, the bottom of the silica gel block can be cleaned. And meanwhile, four movable blocks are pushed to move, an arc-shaped plate is pushed to move through a clamping rod, triangular clamping blocks are pushed out of triangular clamping grooves, the transmission assembly and the fixed assembly are disconnected, then a silica gel block is pulled out downwards, the transmission assembly can be taken down, and the transmission assembly can be conveniently wiped and cleaned or replaced with a new transmission assembly. Under the cooperation of the fixing assembly and the transmission assembly, a coupling agent does not need to be smeared, residues can be prevented from being attached to the disinfection tank body or the ultrasonic transducer body, cleaning is easy and convenient, and the ultrasonic transmission effect is not affected.

The utility model relates to temperature controller technical field, and disclose a kind of quick heat radiation structure of temperature controller, including connecting plate, the top of the connecting plate is fixedly connected with four groups of positioning sheet, the inside of the positioning sheet is sleeved with support pole, the top of the support pole is slidably connected with two groups of pusher assembly, the one side of the pusher assembly is fixedly connected with support spring, the bottom of the connecting plate is fixedly connected with several groups of fin one, the inside of the fin one is sleeved with cooling pipe, one end of the cooling pipe is connected with cooling assembly, the pusher assembly includes the top sliding seat of sliding connection in support pole, the top of the sliding seat is rotatably connected with transmission rod, the top of the transmission rod is rotatably connected with support bolt.The quick heat radiation structure of temperature controller, through the setting of cooling assembly, reach the effect of quick heat dissipation, prevent temperature controller internal overheating to cause part damage, improve the heat dissipation effect of device.

The invention discloses an integrated miniature optical fiber reflection substrate and a manufacturing method thereof, belongs to the technical field of optical fiber reflection substrates, and solves the problems that the performance of an optical fiber reflector is influenced and the stable operation of an optical fiber communication and optical fiber sensing system is threatened. Comprising a substrate, a rectangular groove is formed in the substrate, a V-shaped groove located at the tail end of the rectangular groove is formed in the substrate, the rectangular groove is perpendicular to the V-shaped groove, the tail end of the rectangular groove does not exceed the groove bottom of the V-shaped groove, the inner wall of the V-shaped groove is arranged to be a reflecting surface, an optical fiber is arranged in the rectangular groove, and the rectangular groove is filled with UV epoxy glue to fix the optical fiber. The structure is miniaturized, glue filling and air gaps in a light path are reduced, the influence on optical performance is reduced, the application range is wider, the device integration degree is higher, the rectangular fixing groove is high in precision, the optical fiber fixing reliability is higher, a reflecting surface and a substrate are integrated, the stability and precision of a reflected light beam are improved, displacement of the reflected light beam is prevented, and the device is suitable for large-scale popularization and application. Therefore, accurate reflection of light is ensured.

This invention discloses a sensor probe structure and manufacturing method, belonging to the field of sensor technology. It includes a negative temperature coefficient (NTC) resistor sensor disposed inside a housing, with wires electrically connected to the NTC resistor sensor and passing through the housing. Epoxy resin fills the interior of the housing and encapsulates the NTC resistor sensor, eliminating air gaps within the housing. An adhesive layer covers the exterior of the housing and the wires extending through it. This invention achieves improved waterproof performance, electrical safety, and assembly consistency of the sensor probe.

The application discloses a high-torque-density double-winding permanent magnet motor based on a magnetic gear effect and relates to the technical field of motors.The application comprises a stator core, a fundamental wave winding, a harmonic wave winding, a modulation unit and a permanent magnet rotor; a half-closed slot is formed in the inner surface of the stator core, two sets of windings which are not coupled and have different pole pairs are placed in the slot, one set of the windings is the fundamental wave winding, and the other set of the windings is the harmonic wave winding; the modulation unit is composed of non-magnetic blocks and magnetic blocks which are alternately arranged along a circumference, is connected with the inner surface of the stator core, and only an air gap exists between the modulation unit and the permanent magnet rotor; the permanent magnet rotor is a magnetic gathering type permanent magnet rotor and comprises a tangential excitation permanent magnet and a magnetic separation slot structure. The two sets of windings can efficiently utilize the harmonic magnetic field and the fundamental wave magnetic field, the independent modulation unit is adopted to realize the optimal modulation ratio of the motor, the single air gap structure is beneficial to improving the working magnetic density of the motor, and the torque density of the motor driving system is effectively increased.

The present invention relates to the technical field of brakes, and proposes a closed electromagnetic brake, in which a clutch plate and a friction disc are coaxially arranged in a space enclosed by a casing and a tail casing, a first clutch surface of the clutch plate is used for being attracted to the casing, and a second clutch surface of the clutch plate is used for engaging and rubbing with the friction disc, and at least one annular groove is provided on the second clutch surface to accommodate friction particles on the friction disc, and the annular groove is coaxially arranged with the clutch plate and the friction disc, so that iron-containing debris or dust worn out inside the closed electromagnetic brake enters the annular groove under the adsorption effect of the magnetic field on the clutch plate, thereby reducing the debris and dust entering the air gap between the clutch plate and the casing, improving the functional reliability of the electromagnetic brake and extending its service life; on the other hand, the press-fit method simplifies the assembly method of the casing and the tail casing, increases the utilization rate of the internal space of the brake, and makes the torque of the brake have room for further improvement, thereby improving the braking performance.

An intraluminal ultrasound device configured to be inserted within an inner wall defining a lumen of a patient can include a housing extending from a proximal section to a distal section along a central axis. The housing can include a transducer configured to capture ultrasound images and a mounting component configured to receive the transducer. The intraluminal ultrasound device can also include a force generation system operable to maintain contact between the inner wall and the transducer, in turn causing a reduction in an air gap between the lumen and the transducer.

The invention belongs to the technical field of motors, and particularly relates to a self-supporting foil type winding axial magnetic flux motor which comprises a motor shaft, a stator assembly and a pair of rotor assemblies. The stator assembly comprises a central hub sleeved on the motor shaft, a plurality of stator cores uniformly distributed around the central hub and a stator frame sleeved on the outer sides of all the stator cores, the stator frame is fixedly connected with the central hub through a connecting piece, each stator core comprises an outer stator pole and an inner stator pole, and the outer stator pole is fixedly connected with the central hub through a connecting piece. A coil is wound on the side face of the outer stator pole to form a stator winding, the inner stator pole is attached to the inner side of the outer stator pole, the stator iron core is fixed between the center hub and the stator frame, and the rotor assembly is fixedly connected with a rotating piece for outputting torque. A coil can be conveniently and reliably wound on the side face, the influence of rotating motion on an air gap is small, and the size of the air gap can be easily controlled.

The invention relates to a stable and reliable food processor which comprises a permanent magnet direct current brushless motor, the motor comprises a stator and a rotor, the rotor comprises a rotor iron core and a permanent magnet, the inner side of the outer edge of the rotor iron core is provided with an installation groove for the permanent magnet to be inserted, and the position, opposite to the permanent magnet, of the outer edge of the rotor iron core is provided with a rotor salient pole protruding outwards. A groove is formed between every two adjacent rotor salient poles, the rotor further comprises a fixing cage which is arranged outside the rotor iron core and integrally formed, the fixing cage comprises end plates located at the two ends of the rotor iron core and fixing columns located on the outer side wall of the rotor iron core and connected with the end plates at the two ends, the fixing columns are located at the grooves, and the outer diameter of the fixing columns is not larger than that of the rotor salient poles. The fixing cage is provided with the fixing columns at the grooves to integrally wrap the rotor, the strength of the fixing cage is increased, the rotor iron core and the permanent magnets are fixed and limited, and the situation that the strength of the fixing cage is affected due to the fact that the periphery bears large centrifugal force when the fixing cage is fixedly connected only through the connecting column in the center and deforms is avoided.

This application discloses a dielectric gradient coating for insulating separators, its preparation method, and its application, belonging to the technical field of electrical equipment insulation materials. The method includes the following steps: (1) adding ethylenediamine and perfluorooctyltrimethoxysilane to a solvent to obtain a modified solution, and then adding nano-graphene to the modified solution to obtain fluoroammonia-modified graphene; (2) mixing the first and second dispersions prepared from the fluoroammonia-modified graphene and magnesium-aluminum hydrotalcite respectively to obtain electrostatic spraying liquids with different concentration gradients; (3) sequentially electrostatically spraying the electrostatic spraying liquids with different concentration gradients onto the surface of the separator to form a dielectric gradient coating, wherein the dielectric constant in the dielectric gradient coating increases from the inside to the outside. In this method, the fluoroammonia-modified graphene is uniformly dispersed in epoxy resin and improves the density of the epoxy resin, thereby increasing the bonding force between the coating and the substrate, and thus improving the service life of the insulating separator under high temperature and high humidity conditions.

The invention relates to the technical field related to 3D printing, and discloses a quantitative powder ink supply set which comprises a powder bin and a quantitative part. The transmission part is arranged on the quantifying part and is used for power transmission and energy storage of the quantifying part so as to synchronously drive the paving part and intermittently drive the shifting part; therefore, the powder is subjected to separate paving treatment and intermittent stirring, concentrated accumulation of the powder is avoided, the risk of powder caking or condensation is reduced, powder fluidity is kept, the amount of powder which cannot be used due to local accumulation and powder property change caused by local accumulation are reduced, and the powder quality is improved. Meanwhile, the problem that a falling dead zone is formed due to the fact that the powder is difficult to fall due to factors such as friction force and cohesive force among powder particles is solved, the phenomena of fluctuation and non-uniformity of the powder amount in the powder supply process are reduced, quantitative powder supply is achieved, and in addition, the residual powder amount is estimated more accurately due to the evenly-laid powder surface; and powder can be supplemented in time.

The utility model discloses a motor end cover and a servo motor. The motor end cover comprises an end cover body and a mounting sleeve, the end cover body is provided with a bottom wall and a peripheral wall, the peripheral wall is arranged on the peripheral edge of the bottom wall, and the bottom wall is provided with a bearing seat; the mounting sleeve is connected with the bottom wall, the mounting sleeve is arranged in the circumferential direction of the bearing seat and extends in the axial direction of a rotating shaft of the servo motor, and the mounting sleeve is used for containing a brake stator of the servo motor so that the radial side face of the brake stator can be opposite to the inner wall of the mounting sleeve. According to the utility model, the heat dissipation area between the brake stator and the motor end cover is increased, the air gap between the brake stator and the motor end cover is reduced, the thermal resistance between the brake stator and the motor end cover is reduced, when the servo motor operates, the heat generated by the brake stator can be dissipated through the mounting sleeve and the bottom wall, and the service life of the servo motor is prolonged. The heat dissipation speed is improved, and the temperature rise of the brake stator is reduced.

This invention relates to the field of medical aesthetics and skin repair devices. The invention discloses a needle tip temperature control and cooling device and a radiofrequency microneedle device equipped with the same. The needle tip temperature control and cooling device includes a housing with a receiving cavity and an opening facing the treatment area. A negative pressure chamber is located at the opening facing the receiving cavity, and the negative pressure chamber also has a negative pressure through-hole for communication with a negative pressure output device. It also includes an adaptive cold conduction component disposed at the opening. The adaptive cold conduction component includes independent first and second cold conduction components. The second cold conduction components are U-shaped, and several second cold conduction components are arranged in a three-sided arrangement away from the first cold conduction component. When the first and second cold conduction components have an axial displacement difference, a fitting gap is formed. This fitting gap is configured to form an airflow channel under negative pressure, using airflow shear force to remove condensate from the surfaces of the first and second cold conduction components.

The application discloses the technical field of low-temperature treatment of battery materials and relates to a gas treatment device for removing water content in lithium battery raw materials, aiming at solving the problems of high temperature and uneven heating in the prior art for treating water content in lithium battery raw materials. The device comprises a mounting bracket, a pneumatic conveying assembly, a liquid nitrogen storage tank and a heat pump. A rotating drum is arranged on the mounting bracket in a rotating mode. The rotating axis of the rotating drum is in a non-vertical direction. One end of the rotating drum is provided with a gas pocket. The gas pocket and the end of the rotating drum are in rotating sealing cooperation and can be connected with the inner cavity of the rotating drum. The material conveying end of the pneumatic conveying assembly, the gas supply end of the liquid nitrogen storage tank and the hot air outlet end of the heat pump are connected with the gas pocket through connecting pipes. The device is used for dehydrating and low-temperature treating the raw materials before superfine crushing of the lithium battery raw materials. The device can stably and effectively remove the water content in the materials and complete efficient refrigeration of the materials, which is favorable for avoiding the destruction of the structure of the raw materials and guaranteeing the quality of the final products.

The present invention provides a cable sheath extrusion device and an extrusion method thereof, belonging to the technical field of cable sheaths. The cable sheath extrusion device comprises a base, an extrusion mechanism and a cleaning mechanism. A support is installed on the surface of the base, a loading bin is installed on the surface of the support, and the extrusion mechanism is installed on the surface of the base. The extrusion mechanism comprises a feed pipe, a molding box and an extrusion cavity, and the feed pipe is installed in the inner cavity of the support. The present invention sets an extrusion mechanism, and a first motor can drive the conveying shaft and the conveying blade to rotate, and the feed pipe is synchronously heated by a heating pipe to melt the raw material, and the molten raw material is filtered through a filter plate, and then the raw material is extruded through the extrusion cavity and coated on the surface of the cable to realize the extrusion of the cable sheath; at the same time, when the conveying shaft rotates, it can synchronously drive the two grinding rollers to rotate, and drive the grinding rollers to rotate synchronously through the meshing first gear and the first gear ring, grind the unmelted impurities on the surface of the filter plate, and ensure the quality of the cable sheath.

The utility model provides a kind of paste-free screen and terminal equipment, it relates to screen technical field.Paste-free screen, including touch screen, be equipped with placement slot and place the frame of touch screen, be equipped with the frame in the frame and fixed touch screen and be equipped with the display screen in the frame, wherein, frame and the side frame of frame are equipped with screen connecting hole, with the screen fixed hole of display screen side edge cooperation fastening display screen;Frame and the upper and lower frame of frame are equipped with frame connecting hole, for the fastening of frame and frame.The paste-free screen and terminal equipment of the utility model can achieve the purpose of fastening screen, and at the same time, it is convenient to disassemble, convenient to repair, and beneficial to recycling since it is paste-free mode.

The invention relates to the technical field of medical equipment, in particular to an echocardiography left heart radiography examination device. Comprising an ultrasonic probe, a liquid storage tank used for storing a coupling agent is connected to the ultrasonic probe, a piston is slidably arranged in the liquid storage tank, a handle is connected to the top of the piston, and a magnetic ring I is connected to the side wall of the piston. Through cooperation of the liquid storage tank, the piston, the magnetic ring I, the magnetic ring II and the moving mechanism, a coupling agent in the liquid storage tank can be automatically extruded on the skin of a patient, then the rubber rod can extrude the coupling agent on the skin of the patient through high-frequency vibration, and therefore bubbles in the coupling agent are removed; an ultrasonic probe is arranged on the skin of a patient, so that an air gap between the ultrasonic probe and the skin is reduced, the transmission efficiency of ultrasonic waves is improved, then the couplant on the skin of the patient can be automatically troweled through a troweling frame, the couplant is evenly distributed on the surface of the skin of the patient, time and labor are saved, medical staff can use the couplant conveniently, and training cost and time are reduced.

A motor and an assembly structure thereof, a motor assembly mechanism comprises a stator (1), a first end cap (2), a second end cap (3) and a fastener (4) for fastening the stator (1), the first end cap (2) and the second end cap (3), wherein the stator (1) comprises a middle iron core (13), a first side iron core (11) and a second side iron core (12), the inner edge of the first end cap (2) is provided with a first inner arc surface (21), the outer edge of the first side iron core (11) is provided with a first outer arc surface (111) in interference fit with the first inner arc surface (21), the inner edge of the second end cap (3) is provided with a second inner arc surface (31), and the outer edge of the second side iron core (12) is provided with a second outer arc surface (121) in clearance fit with the second inner arc surface (31). Through the positioning cooperation of the first side iron core (11) and the first end cap (2) and the positioning cooperation of the second side iron core (12) and the second end cap (3), the motor and the assembly structure thereof provided by the present application can effectively improve the coaxiality of the stator and the end caps, and thus improve the coaxiality of the stator and a rotor, and reduce the air gap between the rotor and the stator.

The invention relates to an electrical insulation bio-based thermally induced flexible composite phase change material, which is obtained by mixing and molding the following raw materials: 60-70 wt% of lauric acid, 20-30 wt% of POE and 2.5-10 wt% of h-BN, a specific bio-based phase change material lauric acid is used as a substrate, the flexibility is enhanced by adding thermoplastic POE, and the thermal conduction efficiency is improved and the electrical conductivity is reduced by mixing with a high thermal conductivity insulating filler h-BN. The composite phase change material optimizes the contact with a thermal management element, reduces air gaps, improves the safety and reliability of a system through electrical insulation characteristics, prolongs the service life of electronic equipment, optimizes the thermal management efficiency, and is suitable for the fields of electronic equipment, battery thermal management, thermal energy storage and the like.

The present invention discloses a surgical instrument efficient ultrasonic disinfection tank, which relates to the technical field of medical instrument disinfection, and comprises a disinfection tank body, a fixed component is arranged at the bottom of the disinfection tank body, and a transmission component is arranged inside the fixed component; when the present invention is used, after the mounting plate and the ultrasonic transducer body are removed, the bottom of the silicone block can be cleaned. At the same time, four movable blocks are pushed to move, and the arc plate is pushed to move by the clamp rod, and the triangular clamp block is pushed out of the triangular clamp slot, so that the connection between the transmission component and the fixed component is lost, and then the silicone block is pulled out downward, and the transmission component can be removed, which is convenient for wiping and cleaning or replacing with a new transmission component. With the cooperation of the fixed component and the transmission component, there is no need to apply a coupling agent, which can prevent residues from adhering to the disinfection tank body or the ultrasonic transducer body, and the cleaning is simple and convenient, and does not affect the ultrasonic transmission effect.

According to the cable seamless welding method provided by the invention, the two cables can be seamlessly connected in a mode of being integrally welded with the original cable body, the current-carrying performance and the strength of a connecting joint which is manufactured by the cable seamless welding method and is used for connecting the two cables are consistent with those of the cable body, and the cable seamless welding method is high in reliability. And the cable seamless welding method reduces the experience dependence on operators, and improves the consistency and reliability of cable connection work.

The utility model discloses a radial gas foil bearing capable of independently adjusting circumferential four-direction air gaps. The radial gas foil bearing structurally comprises a bearing sleeve, an air gap adjusting screw rod, a locking screw, a wedge-shaped push block, a supporting tile, a bump foil and a flat foil. The air gap adjusting screw drives the wedge-shaped push block to move axially, so that the position of the supporting tile is adjusted, the bump foil is pushed to be compressed or released, and accurate adjustment of the air gap is achieved; each air gap adjusting screw can independently control the corresponding push block, independent adjustment of air gaps in four directions is ensured, and high precision and flexibility are provided. According to the bearing structure, independent adjustment is achieved through an air gap adjusting mechanism formed by four sets of air gap adjusting screws, wedge-shaped push blocks, supporting tiles and bump foils, the performance of the bearing is optimized, load changes and air film rigidity are adapted, the stability and efficiency of a rotor system are improved, and the bearing structure adapts to various complex working conditions.

This invention discloses a segmented skeleton-type flexible current transformer, relating to the field of current measurement technology. The invention aims to solve the technical problems of traditional rigid current transformers, such as inconvenient installation, incompatibility with Rogowski coil outputs, low accuracy, and excessive errors at the joints of existing flexible current transformers. The transformer core employs differentiated impregnation treatment; the middle flexible main body section is not impregnated to maintain flexibility, while the rigid connecting sections at both ends are impregnated, cured, and have smooth connecting surfaces. Multiple I-shaped skeletons are fixed at equal intervals on the flexible main body section, with air gaps reserved between adjacent skeletons. Independent secondary windings wound on each skeleton are connected in series to form a single closed loop. Locking docking mechanisms are provided at both ends to form a closed magnetic circuit. An auxiliary compensation winding connected in the same direction is fixed on the rigid connecting section to compensate for measurement errors at the magnetic circuit connection point. This invention allows for uninterrupted winding installation, direct output of standard current signals without auxiliary power, full-circuit measurement accuracy of 0.5%, simple and reliable structure, and is suitable for power distribution upgrades and current measurement in confined spaces.