152 results about "Micro gap" patented technology

The invention provides a dielectric barrier discharge reactor with a double-dielectric coating structure, which belongs to the technical field of plasma discharge and dielectric engineering and comprises a DBD (dielectric barrier discharge) power supply, a gas supply and flow control module and a coaxial DBD reactor body. The body is of a coaxial hierarchical structure, a coaxial high-voltage electrode is arranged on the inner side of a hollow quartz tube, a first dielectric layer and a second dielectric layer are attached to and wrap the outer side of the hollow quartz tube to form a radial dielectric constant gradient, a grounding electrode wraps the second dielectric layer, and the two axial ends of the grounding electrode are sleeved with hoops to be clamped and fixed. Two ends of the quartz tube are hermetically connected with PTFE joints with air inlets and air outlets; the DBD power source is electrically connected with the high-voltage electrode through a high-voltage wire, and the gas supply and flow control module is communicated with the PTFE connector through a pipeline. The invention solves the problems of large energy loss and poor discharge stability caused by easy uncontrollable micro-gap between the external electrode and the dielectric tube of the existing dielectric barrier discharge reactor, and is suitable for the scenes of ozone generation, surface modification, plasma catalysis and the like.

The invention discloses a permanent magnet synchronous motor iron core welding device, and relates to the technical field of iron core welding, the permanent magnet synchronous motor iron core welding device comprises a rack, a welding platform is arranged in the rack, a welding manipulator is arranged right above the welding platform, and a laser welding gun main body is mounted at the end part of the welding manipulator; an auxiliary mechanism capable of synchronously moving along with the laser welding gun body from bottom to top is installed on the outer surface of the laser welding gun body, and the auxiliary mechanism can enable silicon steel sheet layers in a local area to have instant micro gaps before welding operation so as to promote molten liquid to permeate into a deep layer. And after welding is completed, axial downward pressure is applied to the area so as to compact the welding seam and increase the compactness between the silicon steel sheet layers, local pressure release of the welding area is achieved through a double-layer pressing plate and an annular pressing rod, continuous operation of gap pre-expansion, melt permeation and welding seam compaction is constructed in cooperation with a Y-shaped push rod and a pressing wheel, melt permeation and the compactness between the layers are taken into consideration, and the welding quality is improved. The iron core welding quality is improved.

The invention discloses a high-precision measurement method for internal gaps and infinitesimal displacement of a closed area based on magnetic-force-sound coupling. The high-precision measurement method comprises the following steps that (1) a sensor module is installed at the tail end of an automatic scanning mechanical arm; (2) controlling the automatic scanning mechanical arm to move, so that the sensor module is close to the surface of the detected material, thereby detecting the magnetic acting force between the magnetic force detection probe (3) and the detected material, and calculating the vertical distance between the magnetic force detection probe (3) and the surface of the detected material; 3) synchronously measuring the film thickness T on the surface of the measured material by using an ultrasonic detection probe; and 4) based on the vertical distance between the magnetic detection probe (3) and the surface of the detected material and the thickness T of the film on the surface of the detected material, calculating the micro-gap between the film and the surface of the detected material. The detection signal is not influenced by factors such as environment temperature and material heat conductivity difference, and existence and specific size of the gap can be accurately detected.

The invention provides an annular air supply chamber for particle control in the wafer conveying process, and the chamber comprises an annular air supply cavity, and the inner ring region of the annular air supply cavity is used for placing a wafer; an air inlet; the fan is arranged on the surface of the annular air supply cavity; the first-stage pressure stabilizing cavity is formed in the annular air supply cavity and communicates with the air inlet hole; the second-stage pressure stabilizing cavity is formed in the annular air supply cavity, and interstage gas transmission of the first-stage pressure stabilizing cavity and interstage gas transmission of the second-stage pressure stabilizing cavity are communicated through a micro gap; the air outlet hole is formed in the annular air supply cavity, located on the outer side of the wafer and communicated with the second-stage pressure stabilizing cavity; wherein the first-stage pressure stabilizing cavity is used for carrying out primary speed reduction and primary pressure homogenization on clean gas introduced from the gas inlet hole under the action of high flow resistance of the micro gap, the second-stage pressure stabilizing cavity is used for carrying out secondary speed reduction and secondary pressure homogenization on the clean gas subjected to primary pressure homogenization, and the gas outlet hole is used for spraying out the clean gas subjected to secondary pressure homogenization; and a uniform and stable closed annular air curtain is formed around the wafer.

This invention discloses a corrosion-resistant and rust-proof bearing ring applied in the field of bearing technology. By setting a magnetic sealing unit at the end of the ring shaft, multiple sealing layers can be formed between the rotating shaft and the bearing end, effectively intercepting external dust, water stains, etc. from entering between the inner ring and the rotating shaft. This effectively avoids the impact of dust, water stains, etc. on the inner wall of the ring. Compared with the existing technology that only uses an interference fit, it effectively eliminates the micro-gap between the two, reduces fretting corrosion, and improves the bearing's rust prevention effect. Through the setting of a monitoring and control unit, the magnetic fluid used for sealing can be monitored, which facilitates timely detection of its radial outward movement under the action of centrifugal force. This allows the operator to replenish the magnetic fluid in a timely manner, effectively avoiding the deterioration of the sealing effect due to magnetic fluid loss and improving the corrosion resistance and rust prevention effect.

The present application relates to the technical field of complex shape remanufacturing, in particular to a complex shape remanufacturing method and material for a desulfurization circulating pump impeller, the complex shape remanufacturing method comprising constructing a multi-modal damage intelligent mapping; synchronously preparing plasma activation and micro-texture; performing energy field coupling cladding repair; performing stress field balance shot peening strengthening; implementing gradient coating self-propagating synthesis; performing thermal-mechanical coupling precision shaping; performing micro-gap pressure infiltration sealing; and performing multi-physical field service simulation verification. The present application can significantly prolong the service cycle of key components, comprehensively enhance the comprehensive performance of anti-cavitation and erosion resistance, establish a digital twin closed loop of damage diagnosis, repair optimization and life prediction, and simultaneously realize life cycle cost control and resource saving. Not only can the present application repair failed components, but also can it rebuild a sustainable operation system.

The application provides a small-size local dry method underwater laser welding drainage device and a drainage method thereof; the drainage device comprises an upper threaded pipe, a lower threaded pipe, a uniform air ring, a connecting module, a drainage cover and a nozzle; the connecting module is provided with a uniform air cavity; a protection air inlet hole is formed in the side wall of the uniform air cavity; the uniform air ring is arranged in the uniform air cavity; a ring-shaped micro gap one is formed between the outer wall of the uniform air ring and the side wall of the uniform air cavity; the protection air is input from the protection air inlet hole, is rectified into uniform annular high-pressure protection air through the ring-shaped micro gap one, and then enters the long straight passage formed by the inner hole of the uniform air ring, the pipe hole of the upper threaded pipe, the pipe hole of the lower threaded pipe and the nozzle jet hole from the space above the uniform air ring; the drainage cover is sleeved outside the lower threaded pipe and extends downward to the outside of the nozzle to form a drainage cavity; and the drainage cover is provided with a drainage air inlet hole. The drainage device effectively generates a local vacuum environment suitable for welding, and has excellent protection for laser welding lenses, and the lenses are not damaged after long-time welding.

The application discloses a diamond mosaic splicing homogeneous epitaxial growth method and system based on AI intelligent control, and belongs to the technical field of single crystal diamond material preparation. A plurality of single crystal diamond substrates are spliced into a large-size deposition base in a mosaic manner; an initial geometric shape and a micro-gap distribution of a splicing seam are identified through a pre-trained AI visual detection model; a global process parameter combination and a staged deposition strategy for promoting lateral epitaxy are generated by combining a homogeneous epitaxial growth thermodynamic database and an AI process optimization model; during the growth process, a morphology evolution image and plasma state data of the splicing seam area are collected in real time, and a gap healing trend is predicted by an AI closed-loop control model, and the global process parameters are dynamically adjusted. Through AI accurate control of the global process parameters, the lateral epitaxy and the grain boundary migration at the splicing seam can be controlled to occur, and finally a seamless integrated large-size single crystal diamond is obtained.

The invention provides a fine gap optical chip dispensing method and a dispensing machine for fine gap dispensing, and belongs to the technical field of optical chip production. The dispensing method comprises the following steps: acquiring a to-be-dispensed area and a non-dispensing area of a product; covering the non-dispensing area of the product with a protective film, and enabling the edge of the protective film to extend to one side of the to-be-dispensed area; dispensing the to-be-dispensed area from the edge of the protective film; wherein the dispensing process is carried out in a dispensing manner. According to the method, the influence of the glue on the chip in the dispensing process can be reduced, so that the dispensing quality of a product is improved. The driving system of the dispensing machine drives the dispensing head to move above the positioning fixture, so that the dispensing head dispenses glue on a product of the positioning fixture in a dotting manner. According to the dispensing machine, accurate positioning of the dispensing head can be realized, so that accurate dispensing of a fine gap chip is realized, and the dispensing quality of a product is improved.

The present application belongs to the field of micro-bubble generating equipment, and discloses a micro-bubble water generating device and a self-cleaning method thereof. The micro-bubble water generating device comprises a gasket, a first pipeline and a second pipeline. One end of the second pipeline is sealingly arranged in the first pipeline, and a throat is formed between the first pipeline and the second pipeline. The gasket is arranged in the throat portion of the throat in an axial stacking manner. Air can enter the throat through the micro gaps between the gaskets and mix with water to form micro-bubble water. The second pipeline can move axially relative to the first pipeline to change the gaps between the gaskets. By arranging the gasket in the throat portion, air enters the throat through the micro gaps between the gaskets and mixes with water, and the generated micro-bubble water has better effect and can be continuously generated. When dirt and impurities are attached to the gasket due to long-time non-use of the micro-bubble water generating device, the gaps between the gaskets can be changed by the axial movement of the first pipeline relative to the second pipeline, so that the self-cleaning of the micro-bubble water generating device is realized.

The invention discloses a vacuum heat insulation anchoring system with a breathing micro-channel and a cap broken bridge structure and a construction method, and relates to the technical field of building energy conservation and outer wall heat preservation, in particular to the vacuum heat insulation anchoring system with the breathing micro-channel and the cap broken bridge structure and the construction method. The device comprises a vacuum heat insulation unit, an anchoring assembly and an edge broken bridge heat insulation strip. The vacuum heat insulation unit is a vacuum heat insulation plate, and packaging flange edges extending outwards are arranged on the periphery of the vacuum heat insulation unit. The anchoring assemblies are arranged at the abutted seams between the adjacent vacuum heat insulation units and used for pressing and fixing the packaging flange edges. The edge broken bridge heat insulation strip is arranged on the outer side of the packaging flange edge and the outer side of the anchoring assembly and covers the packaging flange edge and the anchoring assembly. The back face of the vacuum heat insulation unit is of a flat structure, and a micro-gap cavity ranging from 3 mm to 5 mm is formed between the vacuum heat insulation unit and the base layer wall by means of the thickness of the structural adhesive. The anchoring assemblies are arranged at the abutted seams of the vacuum heat insulation units, the outer sides of the anchoring assemblies are covered with the edge broken bridge heat insulation strips, meanwhile, the moisture removal micro-gap cavities are formed through the structural adhesive, it is guaranteed that the vacuum heat insulation plates are reliably fixed, meanwhile, an anchoring heat bridge is effectively blocked, and moisture removal of the wall is achieved; therefore, the overall heat insulation performance and the use reliability of the external wall insulation system are improved.

The application discloses a kind of high heat-conducting low thermal resistance ceramic sheet materials, preparation method and application thereof, the material includes ceramic substrate and functional coating on the upper surface of ceramic substrate and / or functional coating on the lower surface of ceramic substrate;Ceramic substrate is selected from any one of alumina ceramic sheet, aluminum nitride ceramic sheet, silicon nitride ceramic sheet;Upper functional coating, lower functional coating are PMC phase change material coating and heat-conducting gel coating any combination.The application is coated with functional coating on the surface of ceramic sheet, effectively fills ceramic surface micro gap, significantly reduces interface contact thermal resistance (reduces 50%-89%);PMC coating also has phase change temperature control capacity (phase change enthalpy 50-200J / g), can buffer device transient thermal shock;Coating and substrate are firmly combined, and the thermal resistance change rate is less than 13% after 500 times thermal cycle.The application has the advantages of wide substrate adaptability, high heat-conducting efficiency, excellent insulation performance, simple process and the like.

The utility model discloses a light woven belted layer for a tire, which relates to the technical field of tire design and manufacture, and comprises a tread, a netted woven belted layer, a tire body and a plurality of metal steel wires, the netted woven belted layer is arranged below the tread, the tire body is arranged below the netted woven belted layer, and the metal steel wires are arranged below the netted woven belted layer. The metal steel wires are arranged in the net-shaped woven belt ply, and micro gaps are formed among the multiple metal steel wires. By arranging the braid belted layer, the overall structural strength and stability of the tire can be effectively enhanced, the bonding force between the belted layer and rubber is improved, the metal steel wires are arranged to be of a triangular net-shaped structure, loads and stress can be evenly dispersed, local fracture or deformation caused by stress concentration is avoided, and the service life of the tire is prolonged. The effective area combined with rubber is increased, and heat loss generated after continuous friction between metal monofilaments under a certain load is reduced.

The utility model discloses a symmetrical hidden rotating shaft inward and outward opening hinge, which comprises a static hinge and a movable hinge, the movable hinge comprises a first hinge seat and a second hinge seat, one end of the first hinge seat close to the static hinge is provided with a concave cavity, a rotating shaft is arranged in the concave cavity, and one end of the static hinge close to the movable hinge is provided with a rotating shaft seat. After assembly, the rotating shaft seat is inserted into the concave cavity, so that the rotating shaft seat is hidden in the movable hinge, on one hand, water can be prevented from permeating into the rotating shaft, on the other hand, exposed parts are reduced, and attractiveness is improved. Besides, the second hinge seat is fixedly installed on the opposite side of the first hinge seat, a first face cover is installed on the front side of the first hinge seat in a sliding mode, a second face cover is installed on the rear side of the second hinge seat in a sliding mode, and in the natural state, the first face cover and the second face cover cover the outer side of the rotating shaft seat, so that a micro gap is formed between the static hinge body and the movable hinge body. And exposed parts are further reduced, so that the overall appearance is smoother and more attractive.

The invention relates to a secondary forming connector with a waterproof structure and a forming method, and the connector comprises a connector body which comprises a contact piece and an insulating piece wrapping the contact piece; the shell wraps the insulating part and is provided with a clearance hole, and the insulating part is provided with a plurality of positioning parts which penetrate through the clearance hole and are exposed out of the surface of the shell; the waterproof part comprises a plurality of waterproof retaining walls extending from the surface of the insulating part, the waterproof retaining walls are arranged around the positioning parts one by one, each waterproof retaining wall is provided with at least one sharp corner, and the degree of each sharp corner is smaller than 90 degrees; according to the forming method, a sharp corner is designed on a waterproof retaining wall of an insulating part, and the sharp corner is preferentially melted and deeply fused with a shell material during secondary injection molding of the shell, so that an integrated fusion structure is formed on a bonding interface, micro gaps generated by material shrinkage in a traditional process are fundamentally eliminated, and the service life of the shell is prolonged. The waterproof sealing structure is simple in structure, does not need extra parts and is permanent and reliable, and the waterproof performance and the service life of the connector are remarkably improved.

The invention discloses an aluminum alloy precision casting device for a pre-buried stainless steel pipe, which comprises a vacuum pouring tank body, a partitioned hot air regulation and control assembly, a thermal adaptation self-regulation assembly and a micro-gap thermal isolation assembly, and the partitioned hot air regulation and control assembly is mounted on the outer surface of the vacuum pouring tank body; according to the vacuum pouring tank, the annular variable-frequency high-pressure fan, the high-temperature gas storage tank, the rotary distribution valve and the branch pipes are matched with one another, and a triangular turbulent flow channel is formed by the air guide groove, the first air guide plate and the second air guide plate, so that high-temperature gas forms a stable rotary vortex in a mold; and through mutual cooperation of the disc springs, the high-temperature-resistant supporting rods and the expansion joints, in the repeated cold and hot alternation process of the vacuum pouring tank, the adjacent fan-shaped modules are allowed to generate tiny free displacement, heat stress is effectively absorbed, deformation is adapted, and therefore cracking failure caused by thermal fatigue of the lining is fundamentally restrained.

The invention relates to the technical field of micro-nano sensing and detection, in particular to a temperature sensing method based on a micro-nano robot. The invention discloses a temperature detection method based on a micro-nano robot. The temperature detection method comprises the following steps: step 1, preparing a temperature sensitive material by using copper tetraamminesulfate particles and resin; 2, preparing a micro-nano robot with a temperature detection function by adopting a droplet microfluidic technology and a physical vapor deposition technology based on the temperature sensitive material in the step 1; 3, extracting color features by using the micro-nano robot with the temperature detection function obtained in the step 2, and building a temperature detection regression prediction model based on the color features; and 4, on the basis of the temperature regression prediction model obtained in the step 3, the micro-nano robot with the temperature detection function is used for carrying out temperature detection on the micro gap, and the average value of the detection results of the multiple micro-nano robots is taken as the final detection temperature. The problem that an existing temperature detection method in the industrial field is limited is solved.

The utility model discloses a high-efficiency sealing type concrete pole mould big and small head baffle disc, the concrete pole mould is formed by combining an upper mould and a lower mould, two ends of the mould are provided with feed ports, the feed ports are sealed by baffle discs, the baffle discs are attached to the end face of the mould to form detachable sealing connection, and the upper mould is provided with a sealing cover. An annular groove is formed in the outer side face of the baffle disc, a sealing assembly is arranged in the annular groove, and the sealing assembly is used for forming an elastic sealing face when the baffle disc and the mold are closed. Through the structural design of the annular groove and the protruding sealing ring and the design that the outer side face of the sealing ring exceeds the outer side face of the baffle disc, when the baffle disc and the mold are closed, the sealing ring directly bears extrusion loads, micro gaps are filled through elastic deformation, and a dynamic sealing face is formed. Compared with traditional rigid sealing, the structure can adapt to mold machining errors in a self-adaptive mode.

Provided are a housing assembly, a power storage apparatus, and an electric device. The housing assembly comprises a housing and an electrical connector that are fixedly connected to each other. The electrical connector comprises a first portion, a second portion, and a third portion that are sequentially arranged in the length direction thereof. At least part of the first portion is located in an external space of the housing, and at least part of the third portion is located in an internal space of the housing. A wall of the housing is provided with a channel extending from the internal space to the external space. The second portion is embedded within the channel, and an inner surface of the channel covers an outer surface of the second portion. A bonding body is disposed between the outer surface of the second portion and the inner surface of the channel; the bonding body is bonded to the outer surface of the second portion and the inner surface of the channel. The bonding body bonded to the outer surface of the second portion and the inner surface of the channel utilizes its own elastic deformation to compensate for a difference in degree of deformation between the electrical connector and the housing, preventing the formation of micro gaps, and thereby preventing the formation of leakage paths, improving the sealing performance of the power storage apparatus.

The invention provides a testing system and a testing method, and relates to the technical field of electronic equipment testing. The test system comprises a test voltage generator used for applying a test voltage to a first electronic device and determining a to-be-tested position, the to-be-tested position generating an ablation trace; the harmonic detector is used for carrying out harmonic detection on second electronic equipment after gap improvement is carried out on the positions, corresponding to the to-be-detected position of the first electronic equipment, in the second electronic equipment in sequence, and the second electronic equipment is the electronic equipment in the same batch as the first electronic equipment; the harmonic problem of the second electronic equipment is the same as that of the first electronic equipment, and the harmonic detection results of the second electronic equipment before and after gap improvement are used for determining the intermetallic microscopic gap position causing harmonic generation of the electronic equipment. According to the embodiment of the invention, blind and undifferentiated troubleshooting on the electronic equipment can be avoided, and the efficiency and accuracy of searching for the microscopic gap between the metals in the electronic equipment are remarkably improved.

The invention discloses a preparation method of a lace fabric, which comprises the following steps: carrying out thread hanging and drafting on bottom layer functional yarns to form periodic micro gaps; the bottom-layer functional yarn is subjected to thread hanging drafting, meanwhile, the connecting yarn penetrates, according to the pattern design of the lace fabric, the surface-layer fancy yarn, the bottom-layer functional yarn and the connecting yarn are knitted at the position with patterns through the knitting technology of a large stitch method and a small stitch method, and the lace fabric is prepared; the periodic micro gaps are partially filled with the surface-layer fancy yarn, and the connecting yarn is used for connecting the bottom-layer functional yarn and the surface-layer fancy yarn. According to the preparation method of the lace fabric, the bottom layer functional yarn is subjected to thread hanging and drafting to form periodic micro gaps; and the periodic micro gaps are filled with surface fancy yarns capable of reflecting ultraviolet rays, so that an anti-ultraviolet effect is synergistically generated.

The utility model discloses a kind of high sealing joint for automobile air conditioner pipeline, the utility model relates to air conditioner pipeline technical field, the utility model, including: pipeline, the end surface of the pipeline is fixedly connected with connecting device, the inner wall of the connecting device is fixedly connected with sealing device The sealing device is sealed by extrusion mode, and the sealing device includes extension pipe;By setting sealing device, in sealing device, rubber ring is installed in the clamping groove of extension pipe inner wall, and the micro gap at the connecting place of pipeline is filled by extrusion deformation, to form initial sealing surface;At the same time, the clamping strip of sliding connection in rubber ring inner wall cooperates with bellows, when pressure is generated in pipeline refrigerant, pressure is transmitted to bellows to make it expand, and then push clamping strip extrude rubber ring, realize pressure self-adapting sealing, ensure that joint in system operation process, even if pressure fluctuation can also maintain efficient sealing, effectively prevent the purpose of refrigerant leakage.

The utility model provides an automatic demoulding device for injection moulding processing, including the forming seat, upper cavity, lower cavity, the inside of forming seat is provided with upper cavity, the inside of forming seat is provided with lower cavity, the top mouth of upper cavity is inserted with the top, the top mouth of upper cavity is conical, the bottom fixedly connected with movable rod of top, the bottom fixedly connected with the float disc of movable rod, the float disc is located in the lower chamber. The utility model has the advantages of: after the airflow passes the side of float disc, goes up, finally exports the bottom surface of the impact product after the direction of the side of top and the direction of the gas guide groove. The uniform pressure of the upward movement of top cooperates with the airflow, which can better demould the product. The design of multiple inclined gas guide grooves guides the gas flow, making the airflow uniformly impact multiple points of the product, eliminating the stress concentration of product demoulding; the airflow penetrates the micro gap of the product bottom surface, quickly balances the demoulding negative pressure. To assist its comprehensive better demoulding.

The present application belongs to the technical field of water heaters, and discloses a gas water heater, which comprises a shell, a micro-bubble water generator, a heating assembly and a bypass pipeline arranged in the shell, the micro-bubble water generator is communicated with a water outlet pipe of the heating assembly, the micro-bubble water generator comprises a throat pipe and a gas cutting piece, the gas cutting piece is arranged at a throat position of the throat pipe, external air can enter the throat pipe through a micro gap of the gas cutting piece and mix with water to form micro-bubble water, the bypass pipeline is respectively communicated with a water inlet pipe of the heating assembly and a water outlet end of the micro-bubble water generator, and the bypass pipeline is configured to deliver cold water to the water outlet end to mix with the micro-bubble water. By arranging the micro-bubble water generator, the air can enter the throat pipe through the micro gap of the gas cutting piece and mix with the water to form the micro-bubble water, the cleaning effect is higher, and the user experience is better. By arranging the bypass pipeline, the waste heat temperature rise of the gas water heater can be prevented from being too high, and adverse conditions such as aging of the heating assembly can be avoided.

The invention discloses a copper foil pressing process for a rigid-flex board with a gasket, and relates to the technical field of copper foil pressing, and the process comprises the following steps: S1, carrying out windowing processing on PP2 close to one side of a flexible region, and keeping PP1 close to one side of a copper foil in a non-windowing state; s2, a PTFE glue blocking gasket matched with the PP2 windowing area is prepared; s3, carrying out lamination riveting and lamination according to a preset sequence; s4, adopting a double mask protection mode; s5, processing an annular presplitting groove in the position, corresponding to the flexible area cover, of the exposed PP1 surface after etching; s6, monitoring the size of the micro gap in real time through a laser displacement sensor, and feeding back and adjusting temperature control parameters; and S7, the PTFE glue blocking gaskets are guided and collected from the micro gaps through the guide channels. According to the method, the pre-splitting groove is matched with a directional force coupling uncovering mode, and an existing uncovering scheme of blind groove laser milling and manual prying is replaced. And the pre-splitting groove provides an accurate path for fracture, so that the problems of irregular fracture and burr generation of the PP protective layer can be effectively avoided.

The application discloses a kind of adjusting control method and system for suction disc fork tooth up and down material manipulator, it is related to automation control technical field, the method is by establishing suction establishment observation window W1 in central control system, and frost layer melting discriminant Cf is calculated in suction establishment observation window W1, and according to preliminary comparison evaluation, the comparison of " hard brittle frost layer dominant stage " and " the dangerous transition interval of melt to water film formation " is realized.By this means, the online identification and stage division of the adsorption interface state are realized, avoiding the misjudgment caused by using only a fixed vacuum threshold or a fixed delay, enabling the manipulator to enter the micro-pulse adsorption defrosting mode and return to S2 when it has not entered the frost layer melting window, thereby reducing the problem of slow or fluctuating vacuum establishment caused by the formation of micro-gaps due to the toppling of frost crystals in the hard brittle frost layer stage, and reducing the instability of handling caused by the falling of frost fragments and adsorption discontinuity.

The application discloses a kind of folding screen electronic equipment, belongs to folding screen electronic equipment technical field.Folding screen electronic equipment includes shell assembly, screen module, speaker module and sound guide pipe;Screen module is set to shell assembly, and screen module is surrounded with shell assembly to form inner cavity;Speaker module is provided with first sound hole, and speaker module is set in inner cavity;Sound guide pipe is arranged between screen module and shell assembly, and sound guide pipe extends along the edge of screen module, and sound guide pipe forms sound guide passage and multiple second sound holes, and sound guide passage is communicated with first sound hole, and the sound emitted by speaker module is transmitted to the micro gap sound hole of shell assembly through sound guide passage and multiple second sound holes.

This invention discloses a method and system for determining vibration-induced cavitation in micro-gap insulating oil, relating to the field of power equipment condition monitoring technology. First, a micro-gap fluid pressure analysis model under vibration is established. By considering a nonlinear model with multi-field coupling, the fluid pressure in the micro-gap is obtained. Then, to analyze the cavitation pressure threshold of bubble nuclei, a multi-parameter coupled analytical model incorporating dynamic gas-liquid balance correction is established to obtain the cavitation pressure threshold. Finally, a dynamic cavitation determination and critical state early warning model for insulating oil is established to obtain the cavitation risk factor and cavitation determination results. The method proposed in this invention considers the influence of multiple dynamic factors, has good dynamic adaptability, and the introduction of a multi-field coupled nonlinear model improves the accuracy of cavitation determination, providing a new approach for micro-gap cavitation research.

The invention discloses a spherical flexible transmission positioning device and method, and belongs to the technical field of railway engineering equipment.The method comprises the steps that S10, coarse positioning is conducted; s20, a visual identification and deviation generation step; s30, an active position adjusting step; s40, a passive self-adaptive fine tuning step; the transmission positioning device comprises a control base integrated with a control system, a spherical hinge control rod, four sets of adjusting spherical hinge assemblies and a sleeve, and by introducing a distributed passive flexible network composed of four sets of spherical hinges and connecting rods, the end effector is endowed with the self-adaptive deformation following capacity; the device can absorb and compensate dynamic deviation caused by track irregularity in real time only by means of mechanical properties, and full-automatic accurate alignment is achieved. And due to the active-passive composite structure, when the device bears and transmits working torque, the connection efficiency close to rigidity can be kept through a main transmission path in micro-clearance fit, and torque loss is avoided.

The application discloses an aluminum alloy precision casting device with embedded stainless steel pipes, which comprises a vacuum pouring tank body, a partitioned hot air regulation component, a heat-adaptive self-adjusting component and a micro-gap heat isolation component. The outer surface of the vacuum pouring tank body is provided with the partitioned hot air regulation component, and the inner part of the vacuum pouring tank body is provided with the heat-adaptive self-adjusting component. The annular variable frequency high-pressure fan, the high-temperature gas storage tank, the rotary distribution valve and the partitioned pipes are cooperated with each other, and the triangular turbulence channel formed by the air guide groove, the air guide plate one and the air guide plate two, so that the high-temperature gas forms a stable rotating vortex in the mold, thereby realizing the uniform preheating of the whole casting mold. Through the cooperation of the disc spring, the high-temperature resistant support rod and the expansion joint, the adjacent sector modules are allowed to produce a small free displacement in the repeated cold and hot alternating process of the vacuum pouring tank, the thermal stress is effectively absorbed and the deformation is adapted, so that the cracking failure of the inner lining caused by thermal fatigue is fundamentally inhibited.