434results about How to "Improve cooling conditions" patented technology

The invention relates to apparatus for positioning and cooling melting lining layer when the melting lining layer flows out of the reactor shell during accident. The improvements of invention are described as following: the design of the cooling lining layer trap which has steel basket shell and arranged in sub-reactor, wherein sacrifice material is filled in the steel basket for diluting the component containing uranium and steel component of the lining layer; the shape (arrangement) of the sacrifice material in reactor core; the choice for optimum number of the sacrifice material; installation of guiding device used for the lining layer flowing into the reactor core trap. Especially, the thickness of bottom of the cooling jacket is larger than the thickness of the side wall thereof for no less than 30%, and the cooling jacket inclines to its center for 10 to 20 degree; the diluent and sacrifice material is made into blocks packed in steel shell.

The invention belongs to the field of the metallurgy technology and material science, and aims at providing a laser welding process method of brittle high silicon steel. Quick welding of strip tension rolling in the rolling preparation process of a high silicon steel thin strip is met. According to the mass ratio, an adopted alloy is prepared from 93%-96.5% of Fe and 3.5%-7% of Si; and the thickness ranges from 0.1 mm to 3.5 mm. According to the method, laser welding and a supplementary heat source are combined, and double-face or single-face welding is adopted; preheating carried out before welding is utilized for controlling the temperature rise speed, and heat preservation during welding and heat preservation carried out after welding are utilized for slow cooling to control the temperature reduction speed; and the temperature gradient and welding stress in the weld joint cooling process are reduced, and welding forming of the brittle high silicon steel is achieved. By means of the adoption of the method, cracks generated by the too high welding stress of the brittle high silicon steel can be avoided well, and the yield and the mechanical performance of the brittle high silicon steel are increased.

The invention discloses a disc brake with a friction block return structure. The disc brake comprises a brake disc, friction blocks located at two sides of the brake disc, a clamp body bracket supporting the friction blocks, a clamp body pushing the friction block along the axial direction of the brake disc and a friction block pressing plate at one side of the friction blocks, and the middle part of the friction block pressing plate is provided with an elastic element which is inclined towards the axis of the brake disc and can deform elastically along the direction vertical to the axis of the brake disc. The disc brake enables the friction blocks to return to the original position in time after brake removal, and ensures that the radiation condition is improved and the delayed friction between the friction blocks and the brake disc can be avoided.

The invention discloses a magnetic coupler which comprises a power input shaft, connecting flanges, permanent magnet outer rotor assemblies, cage type inner rotors, a power output shaft and a mechanical speed adjustment device, wherein the permanent magnet outer rotor assemblies have hollow cup-shaped structures, are sleeved outside the cage-type inner rotors and realize transmission of torque under the coupling action of an air gap magnetic field between the permanent magnet outer rotor assemblies and the cage-type inner rotors; the mechanical speed adjustment device can change axial air gap areas between the permanent magnet outer rotor assemblies and the cage-type inner rotors according to a lever theory, thus realizing stepless speed variation for load rotating speed. According to the magnetic coupler, a method for designing the number of pole pairs of the permanent magnet outer rotor assemblies is provided on the basis of a minimum torque ripple rule, so that the thickness of yokes and the rotating inertia of the coupler are reduced. The cage-type inner rotors can adopt structures which are the same as or similar to that of the conventional motor cage rotor iron core. The magnetic coupler disclosed by the invention can be coaxially connected with a load and can be used as a belt wheel adapter matched with a belt wheel.

The invention relates to a high-speed high-precision built-in dynamic and static piezoelectric main shaft. The high-speed high-precision built-in dynamic and static piezoelectric main shaft is characterized in that the main shaft comprises a box body, a front bearing and a rear bearing are arranged in the box body through a front bearing end cover and a rear bearing end cover correspondingly, and the front bearing and the rear bearing jointly bear a main shaft body internally provided with an online dynamic balancing head; the box body is provided with an oil inlet and an oil outlet, the oil inlet communicates with the oil outlet through an oil way, the oil way is divided into two parts, and one part enters the front bearing and the rear bearing through the oil inlet to suspend the main shaft body in a gap between the front bearing and the rear bearing to form pure liquid lubrication; and the other part is fed to the front bearing and the front bearing end cover to make the main shaft body achieve axial positioning, and a grinding wheel is arranged on the front bearing end cover through a flange disc. The high-speed high precision built-in dynamic and static piezoelectric main shaft is simple in structure, good in dynamic performance, large in rotation number of the main shaft, high in rotation precision and small in heat deformation and can be widely applied to grinding wheel electric main shafts of precise grinding machines, main shafts of numerical control machining centers and precise lathes and the like.

The invention discloses a paper diaper. The front end of an absorption core layer of the paper diaper is provided with at least one branch, and the branches can be combined and folded to form a three-dimensional structure. A coating and the front end of base cloth can also be folded into a three-dimensional structure. The three-dimensional structure at the front end of the paper diaper can provide a space for the scrotum of a baby boy and is favorable for heat dissipation of the testis. The rear end of the paper diaper can be folded to form a three-dimensional structure to accommodate the excrement of the infant. The paper diaper, only the rear end of which is provided with the three-dimensional structure, can be used for a baby girl. The paper diaper can be used as an adult paper diaper.

The invention discloses an adhesive filling and grinding method for a stator-rotor iron core component of a motor. The method comprises the processes of gluing the iron core component through lamination, grinding an iron core by a benchwork, filling an adhesive, removing adhesive layers on two end faces by the benchwork, grinding an inner hole and an excircle of the iron core by a grinder, removing a potting adhesive and the like. The method is characterized in that: when the adhesive is filled, the potting adhesive is placed into a container, stirred and heated to a temperature of between 120 and 130 DEG C; the potting adhesive is poured into an pre-heated iron core groove immediately; a die is vacuumized in a vacuum chamber, so that bubbles are removed from the die, wherein the vacuum degree is 10 to 300Pa and the time is 5 to 20 minutes; and the die is taken out and cooled at the room temperature, so that the potting adhesive is solidified. Compared with the prior art, a profiled groove part of the stator-rotor iron core component forms an entity through the adhesive filling process so that deformation resistance of the stator-rotor iron core component is enhanced and interrupted cut is avoided; and at the same time, the grinding process solves the problems of crack, swelling, poor coaxiality and the like caused by internal and external conicity of the stator-rotor iron core component and temperature distortion of the adhesive layers of the iron core component.

The invention discloses a spiral fluted tap and a method for processing the same. The spiral fluted tap comprises a tap body provided with a plurality of uniformly distributed spiral flutes on a front cut part, wherein the spiral flute is an S-shaped smooth curved groove formed by sequentially connecting four sections of tangential circular arcs end to end; and the four sections of tangential circular arcs are a cutting circular arc, a chip curling circular arc, a chip accommodating circular arc and a blade back circular arc respectively. The method for processing the spiral fluted tap comprises the following steps of: (1) preparing before processing; (2) processing the spiral flute by a special tool: fitting a blade shape of a cutter by a computer, and then manufacturing the cutter according to the fitted cutter blade shape so as to process the spiral flute; and (3) carrying out subsequent treatment by using a machining process so as to obtain a finished product of the tap body. The spiral fluted tap processed by the method has simple structure and can be molded in one step. Moreover, the processing method is suitable for different processing materials, particularly for processing fluted taps made of light alloys, such as an aluminum alloy and the like.

A test socket-lid assembly for testing electronic devices such as IC chips consists of a socket sub-assembly and a lid-sub-assembly, which is separated from the socket sub-assembly. In the lid sub-assembly, the lid is pivotally connected to the frame and supports a spring-loaded pusher that can slide in a vertical direction relative to the lid and can perform rocking movements relative to the lid. The assembly is distinguished from existing devices of this type in that the IC chip is supported and clamped in the lid sub-assembly and in that the entire lid sub-assembly together with the clamped and spring-loaded pusher is attached to the socket by guiding the lid sub-assembly in a transverse direction along the socket guide to the position wherein the spring plungers are locked into their respective openings on the surface of the socket. In one embodiment the pusher is a single part that has three degrees of freedom relative to the IC chip; in another embodiment, the pusher is of a composite structure and has five degrees of freedom.

The invention discloses a radial-array permanent-magnet eddy current retarder. Rotors are installed on a transmission shaft; the transmission shaft is installed in a central hole of a fixing plate; two ends of a bidirectional screw shaft are installed inside holes above the central hole of the fixing plate; two ends of each of three linear optical shafts are fixed into holes in front of, behind and below the central hole of the fixing plate; each of the two rotors consists of a radial-array permanent-magnet ring and a retaining rack; an end surface of one side of the permanent-magnet ring is fixed on an end surface of the retaining rack through bolts; radial clearances are formed between an inner cylindrical surface and an outer cylindrical surface of the permanent-magnet ring and an inner cylindrical surface and an outer cylindrical surface of an annular groove of each rotor; four installing holes are uniformly distributed on the retaining rack; an upper installing hole is matched with the bidirectional screw shaft through a screw nut; the other three installing holes are matched with the linear optical shafts through linear bearings; and a servo motor is connected whit the bidirectional screw shaft through a shaft coupler. In the radial-array permanent-magnet eddy current retarder, the utilization ratio of a magnet is high, the brake moment is large, the response is quick, and the stepless regulation of the brake moment is realized.

The invention relates to an overall salient type intermediate-frequency brushless excitation synchronous generator, which comprises a main generator, an exciter, an excitation regulating system. The excitation regulating system consists of a compound excitation device, a rotating rectifier and an AVR automatic voltage regulator, wherein the compound excitation device consists of a compound excitation winding, a compound excitation current transformer and a three-phase rectifier bridge, the stator of the main generator adopts a fractional slot type short-range winding, the slot number per pole and per phase q is a fractional value, the rotor of the main generator is formed by lamination of multi-pole rotor core laminated pieces, the rotor core of the main generator is of an overall salient type rotor core structure and is formed by overall punching and lamination of rotor core laminated pieces, each rotor core laminated piece is formed with a magnetic pole and a magnetic yoke integrated, and an axial air-cooling hole is arranged at the magnetic yoke. The generator realizes the brushless excitation intermediate-frequency generation, outputs the single-phase or three-phase intermediate-frequency voltage, and has the advantages of excellent performance, stable and reliable operation and high output power.

The invention discloses a heat pipe cutter and a method for improving radiation of a cutting tool by using the heat pipe. The heat pipe cutter comprises a cutter body, a heat pipe and a fixing device, wherein the heat pipe is axially divided into an evaporation section, a thermal insulation section and a condensation section in turn along the heat pipe; the heat pipe is arranged on the cutter body through the fixing device; the evaporation section of the heat pipe is positioned on a main blade and at the rear end of the cutter point; the evaporation section of the heat pipe is in close contact with the cutter; a space is formed between the thermal insulation section of the heat pipe and the cutter; and the condensation section of the heat pipe is arranged on the outer side of the cutter. The heat mainly produced by the cutter head is conducted to the evaporation section of the heat pipe through the cutter head, the working medium in the evaporation section of the heat pipe absorbs the heat and is boiled, and after phase transition, the high-pressure vapor carrying heat arrives the condensation section after passing through the thermal insulation section and is condensed at the condensation section to release the latent heat, and the capillary attraction liquid depending on a liquid absorption core flows back to the evaporation section again to finish a heat transfer process of one period; and the steps are repeated so that the heat produced by the cutting of the cutter head is constantly transferred to the condensation section from the evaporation section of the heat pipe to be diffused, and thus the temperature rise of the cutter head is effectively avoided.

The invention relates to a sponge titanium reduction distillation reactor which is formed by connecting a tank body and a large cover through a flange rubber cushion and a bolt set, wherein the tank body comprises a bottom plate, a sieve plate, a magnesium chloride discharge casing, a tank body flange and a waist-type cylinder; the large cover comprises a magnesium chloride discharge pipe, a thermal insulation layer, an internal heating device, a large cover upper flange, a large cover lower flange, a central pipe, a charging casing 1, a short cylinder and a charging casing 2; the integral reactor is in a stereoscopic waist circular structure; and the bottom plate is a sloping plate positioned on the lowest part of the whole reactor, and is matched with the waist-type cylinder to form an open stereoscopic waist-type tank body. The integral effective width of the reactor is 1.2-1.5 meters, the height is 1.5-2.5 times of the width, and the length is 2-3 times of the width. The reactor for producing sponge titanium can change the sponge titanium structure, solve the problem of compactness, greatly enhance the overall charging rate, simplify the distillation process and greatly shorten the period.

The invention discloses a modularized flux switching permanent magnet (FSPM) motor, which is used for solving the problem of such a motor in which a permanent magnet is placed in a rotor. The motor comprises a stator and a rotor and adopts an inner rotor mode or an external rotor mode. The stator and the rotor are respectively a convexo-convex pole and slot structure. A magnetic module and a centralized armature winding are arranged on the stator; the magnetic module comprises one male concentrating flux iron core and one female concentrating flux iron core of the stator as well as a permanent magnet embedded in the stator; and the rotor is not provided with a permanent magnet and a winding. The motor has the beneficial effects that the structure is simple, compact and stable, and the volume is small; the windings are high in slot fullness, the resistance and the copper consumption are decreased and the efficiency is higher; the linear charge density, the torque output capacity and the power density are improved; the magnetic flux gathering effect exists, and the no-load air gap magnetic density is higher; and the armature reaction flux is vertical to the permanent magnet flux in space, and the stronger demagnetization-resisting capacity is ensured.

The invention relates to a circular shielding insulating bus, which has the advantages of high carrying capacity, good heat dissipation, low temperature rise, strong electric insulation performance, no environmental disturbance and high reliability. The circular shielding insulating bus comprises a circular conductor and an outer layer sheath, wherein a plurality of insulating shielding layers are arranged between the circular conductor and the outer layer sheath and consist of insulating layers and shielding layers; each insulating layer comprises two polytetrafluoroethylene layers and a thermal shrinkage sheath from inside to outside; and silicone oil is uniformly brushed between the polytetrafluoroethylene and the thermal shrinkage sheath.

The invention relates to electronic paste and a preparation method of the electronic paste. The electronic paste comprises, by weight, 30-70% of silver-plated copper powder or silver-plated nickel powder, 0-40% of nano-silver powder, 3-15% of organic solvent, 5-12% of macromolecule resin and 2-10% of inorganic additive. The preparation method of the electronic paste comprises the steps of (1) weighing the macromolecule resin and the organic solvent in proportion, placing the macromolecule resin and the organic solvent into a container, placing the container into a thermostatic water bath, evenly mixing the macromolecule resin and the organic solvent to obtain an organic carrier, and (2) weighing the silver-plated copper powder or the silver-plated nickel powder, the nano-silver powder and the inorganic additives in proportion, adding the silver-plated copper powder or the silver-plated nickel powder, the nano-silver powder and the inorganic additives to the organic carrier obtained in the step (1), carrying out grinding and rolling to meet the requirement of the fineness to achieve even distribution of the solid-phase powder in the organic carrier. The preparation method of the electronic paste is simple, high in production efficiency and low in cost. When the obtained electronic paste is used for printing a fuse link structure of a surface-mount fuse, and compared with traditional silver paste, the pulse resistant capacity is greatly improved.

The invention relates to an HVAC (heating ventilation and air conditioning) control system of a household central air conditioner, comprising an HVAC system controller, a centrifugal blower motor, a compressor motor, and an axial fan motor, wherein the HVAC system controller comprises an HVAC microprocessor, a sensor, a motor control interface unit and a power supply portion; the power supply portion is used to supply power for circuits of various parts; the sensor transmits a detection signal to the HVAC microprocessor through a signal processing circuit, wherein at least one of the centrifugal blower motor, the compressor motor and the axial fan motor is a permanent magnet synchronous motor without a motor controller; the motor control interface unit comprises an inverter unit and a rotor position detecting unit; the HVAC microprocessor drives the permanent magnet synchronous motor without the motor controller through the inverter unit; the rotor position detecting unit transmits a rotor position signal of the permanent magnet synchronous motor without the motor controller to the HVAC microprocessor to process. According to the invention, overlapped circuit configuration is removed, circuit structures are simplified, product cost is reduced greatly, and resource waste is reduced.