36results about How to "Small overall deformation" patented technology

The invention provides a machining method for a complex thin-wall part, and relates to the technical field of mechanical manufacturing, in theory, MASTERCAME software is used for simulating and analyzing a cutting path of a cutting tool on the thin-wall part, a numerical control program is programmed, a high-precision mold mandrel is adopted, the mold mandrel is consistent with an inner cavity of a product in shape, a gap is reserved, small deformation and vibration in the machining process are ensured, and the machining precision is improved. Meanwhile, the clamping fixture mandrel can absorb part of cutting heat, thermal deformation of a cutter and a product is kept small, the long one-time feeding time of a thin-wall workpiece is very long, so that the cutter is greatly abraded due to vibration in the cutting process, and the dimensional accuracy of the workpiece is affected; geometric parameters and abrasion resistance of the tool are reasonably selected, the influence caused by tool abrasion is minimized, small deformation and vibration in the machining process are guaranteed, meanwhile, the clamping fixture mandrel can absorb part of cutting heat, and thermal deformation of the tool and a product is kept small.

A method for installing a wind power tower containing a rectangular tube, characterized in that it includes the following steps: (1) making a honeycomb columnar force-bearing structure, firstly processing a columnar pad tube of a corresponding height according to the height of the inner opening of the rectangular tube body, processing the upper plate and the lower plate of the columnar pad tube according to the distribution of the rectangular tube bolt holes on the rectangular tube body, opening holes in the upper plate and the lower plate, installing the columnar pad tube into the holes in the upper plate and the lower plate to form a honeycomb structure, and then installing the honeycomb columnar force-bearing structure into the inside of an opening at one end of the rectangular tube body through connecting bolts to form a rectangular tube; (2) connecting four The supporting circular tube is installed on the ground, and the supporting units of each layer of the connecting structure are installed. One end of the two oblique tubes and two horizontal tubes is installed on the supporting circular tube, and the other end of the two oblique tubes and two horizontal tubes is installed on the connecting plate through fixing bolts; one end of the two rectangular tubes is fixed to the supporting circular tube, and then the fixing bolts are respectively passed through the fixing plate 1, the rectangular tube 1, the connecting plate, the rectangular tube 2, and the fixing plate 2 to connect; (3) The supporting units of each layer of the connecting structure are connected to each other, and the adjacent fixing plates 2 are connected by connecting tubes, and the opposite fixing plates 2 are connected by tie rods.

The invention relates to the field of blast furnace shell installation, maintenance and replacement, and discloses a welding method for partial replacement of a smelting blast furnace shell, to-be-replaced furnace shell sections are m furnace shell sections in the middle of a blast furnace, and n groups of furnace shell areas, sequentially arranged in the circumferential direction, of the m furnace shell sections are sequentially replaced. The welding method comprises the following steps that a first group of furnace shell areas are replaced, a new furnace shell and an old furnace shell are fixedly connected through a clamping plate, and then transverse seams between adjacent zones of the new furnace shell and between the new furnace shell and the old furnace shell are fixedly connected in a welding mode; and sequentially replacing the (2-n) th group of furnace shell areas, firstly connecting and fixing vertical seams between the new furnace shells in a welding manner, and then connecting and fixing transverse seams between adjacent zones of the new furnace shells and between the new furnace shells and the old furnace shells in a welding manner. By means of the welding method, the purpose that the stress and deformation of the weld joint after welding are within the minimum range can be achieved.

The utility model discloses an ultra-thin multilayer silica gel braided tube, which relates to the technical field of silica gel braided tubes and comprises a silica gel braided tube body, a connector assembly is arranged at one end of the silica gel braided tube body, a butt joint assembly is arranged at the other end of the silica gel braided tube body, and the connector assembly is matched with the butt joint assembly. The silica gel braided tube body comprises a pipeline body, an anti-sticking layer is arranged on the inner wall of the pipeline body, and the anti-sticking layer is used for preventing adhesion between the inner wall of the silica gel braided tube body and a conveying medium; the butt joint assembly comprises a second connecting cavity tube fixedly connected to one end of the silica gel braided tube body; the connector assembly comprises a first connecting cavity tube fixedly connected to one end of the silica gel braided tube body, and a positioning rod is fixedly connected to one side of the first connecting cavity tube, so that the silica gel braided tube bodies, the connector assembly and the butt joint assembly are matched together, and the two silica gel braided tube bodies can be quickly assembled and disassembled; the working efficiency of the device is improved, and the requirements of more customers are met.

The present invention discloses a pier column structure using segmented prefabricated shells and a construction method thereof, including a plurality of pier column segments, which are arranged along the height direction of the pier, two adjacent pier column segments are connected by vertical wet joints, and any pier column segment includes a plurality of prefabricated shells, which are arranged along the circumference of the pier and form a cylindrical structure that passes through from top to bottom, and the plurality of prefabricated shells are connected in pairs by circumferential wet joints; core-filled concrete is filled in the interior of the cavity formed by the plurality of prefabricated shells. The present invention combines the prefabrication process with the cast-in-place process to form a new type of construction method of partial prefabrication and partial cast-in-place. Under the condition of ensuring the connection stability of the pier column segments, the prefabricated shell of a single pier column segment is prefabricated in circumferential blocks, which effectively reduces the lifting weight of the prefabricated shell, and is convenient for prefabrication, transportation and hoisting; the vertical and circumferential wet joints of the upper pier column segment and the core-filled concrete of the lower pier column segment are cast at the same time, achieving synchronous equal strength, which can effectively improve the construction efficiency of the pier.

The application belongs to the technical field of photovoltaic support, and discloses a novel perforation-free support, which comprises a support body, wherein the support body comprises a connection piece in the shape of Chinese character and a wave-peak support in the shape of eight characters arranged below the connection piece; a waist-shaped hole is formed in the top of the connection piece; the wave-peak support is attached to the upper surface of the wave peak of a metal tile roof; the wave-peak support is connected to the wave-peak surface by hot air welding; the wave-peak support in the shape of eight characters can uniformly disperse and transmit the load to the wave peak of the metal tile roof; due to the strong bending deformation resistance of the wave-peak structure, the damage and large deformation of the roof tile can be effectively avoided; the perforation-free design, the hot air welding connection of the wave-peak support and the roof, the use of the same waterproof material for the skirt edge and other measures can guarantee the integrity of the waterproof layer of the roof from multiple aspects and eliminate the hidden danger of water leakage.

The unilateral water-facing bridge foundation pit support system and its construction method of the present invention belong to the field of bridge engineering. It adopts a "day"-shaped steel sheet pile enclosure and a support structure is arranged inside the steel sheet pile enclosure. Since the foundation pit extends deeply into the water on one side, there is a certain difference in the water and soil pressures on both sides of the foundation pit. Setting the steel sheet pile enclosure into a "day"-shaped structure can prevent large deformations, support shedding or even overall instability from occurring on the bias side during the foundation pit excavation process. Compared with the foundation pit enclosures of cement mixing piles or bored cast-in-place piles, the construction of the present invention is convenient, the construction speed is fast, and there is no need for a curing period. Compared with the foundation pit enclosure of pine piles, the enclosure effect and waterproof performance of the present invention are better. Compared with the "mouth"-shaped steel sheet pile enclosure, the safety performance of the present invention is good, and it can effectively prevent quality accidents such as the inclination of the enclosure pile and the fracture of the purlin caused by the unilateral water pressure. The steel sheet piles can be recycled later, causing no pollution to the water area, protecting land resources and saving costs.

The invention discloses a high-efficiency selective laser sintering method, which comprises at least one mixture of raw material powder including a low-melting-point binder and at least one laser beam for selective laser sintering; the melting point of the binder is m p , the decomposition temperature is b p , so that the laser beam irradiates the raw material of the mixture, the highest temperature of the raw material rises to T, the duration of the temperature is t, and the following conditions are met: #imgabs0# and m p <T<b p , t>0; this method allows the temperature of a larger range of raw material powder to be maintained in the range from melting point to decomposition point for a certain period of time, while making the temperature distribution and gradient tend to be uniform, so that the residual stress and deformation after laser sintering are smaller; and the beam irradiation with a larger irradiation area also ensures the improvement of laser sintering efficiency.

The utility model provides an A column structure and a vehicle. The A column structure comprises an A column outer reinforcing plate, an A column upper reinforcing piece and an upper longitudinal beam reinforcing plate installed on a front wall upper longitudinal beam. The A-pillar upper reinforcer comprises a first turnup, a second turnup and a first mounting plate used for mounting an automobile door upper assembly part, and the first turnup and the second turnup are oppositely arranged on the front side and the rear side of the first mounting plate; the first turnup, the second turnup and the first mounting plate are all welded on the A-pillar outer reinforcing plate, and the upper longitudinal beam reinforcing plate is connected with the A-pillar outer reinforcing plate. According to the A column structure, the first mounting plate, the first turnup and the second turnup are all welded to the A column outer reinforcing plate, the strength and rigidity of mounting points of assembly parts on a vehicle door are enhanced through three-face welding, and the connection reliability and collision resistance are enhanced; and the front wall upper longitudinal beam and the A column outer reinforcing plate are connected through the upper longitudinal beam reinforcing plate, so that when the front collision of the vehicle occurs, the collision force is transmitted to the A column outer plate reinforcing plate and the A column upper reinforcing piece from the front wall upper longitudinal beam, and the A column structure can be prevented from being greatly deformed.

A resonator, a resonator assembly, a filter, an electronic device, and a method for manufacturing the resonator. The resonator comprises: a substrate, comprising a first surface and a second surface opposite to each other; a first electrode, located on the first surface, where the first electrode comprises a first protruding portion protruding away from the first surface and a first flat portion attached on the first surface, and a cavity is formed between the first protruding portion and the first surface; a piezoelectric layer, located at a side of the first electrode away from the substrate, where the piezoelectric layer extends in parallel with the first surface; and a second electrode, located at a side of the piezoelectric layer away from the first electrode. Since the piezoelectric layer extends in parallel with the first surface, the variation of stress is small throughout the entire piezoelectric layer, which ensures consistency of a piezoelectric performance of the piezoelectric layer. The piezoelectric layer having small deformation renders a mechanical structure stable, and is less likely break under an external impact.

The invention relates to the technical field of paper product packaging, and discloses an automatic paper product packaging device which comprises a support, a feeding table is arranged on the support, an electric sliding table is arranged on the support, an air cylinder is installed at the bottom of the electric sliding table, and a supporting plate used for installing a paper box is arranged at the telescopic end of the air cylinder. The supporting plate corresponds to a paper box in size, a first roller is arranged on the support and used for smoothing stickers in the paper box, the first roller is in transmission connection with a piston rod of the air cylinder, and when the piston rod of the air cylinder moves downwards, the first roller moves along the outer wall of the paper box. And bubbles between the stickers and the paper box are discharged. And in the moving process of the first roller, the first roller removes bubbles between the stickers and the paper box, so that the stickers are prevented from being damaged or wrinkled when being flattened, and the waterproofness and attractiveness of the paper box are guaranteed.

The utility model relates to the technical field of aircrafts, in particular to an anti-torsion connecting support and an aircraft. The anti-torsion connecting support comprises a first connecting piece, a second connecting piece and a third connecting piece, and the third connecting piece is connected with the first connecting piece through a forked connecting piece; the third connecting piece is connected with the second connecting piece through a claw-shaped connecting piece; the first connecting piece and the second connecting piece are connected through a cage-shaped connecting piece. The forked connecting piece, the claw-shaped connecting piece and the cage-shaped connecting piece not only can ensure the stability of connection and solve the problem of large deformation of parts under the working condition of large torque load, but also can obviously reduce the overall weight of the anti-torsion connecting bracket. The aircraft provided by the utility model also has the above technical effects due to the fact that the aircraft comprises the anti-torsion connecting bracket.

The utility model provides a thickness measuring device and wafer double-sided grinding equipment, and the thickness measuring device comprises a support and two thickness measuring assemblies. The support is fixedly arranged, and at least part of the support is a ceramic support. The two thickness measuring assemblies are installed on the ceramic support. Each thickness measuring assembly comprises a measuring module and a sensing head, the measuring module is installed on the support, and the sensing head is installed on the measuring module; when the wafer is subjected to double-sided grinding, the sensing heads of the two thickness measuring assemblies are pressed on the surfaces of the two sides of the wafer respectively; the measuring module is used for detecting and outputting position changes of the two sensing heads. Wherein a cooling channel for cooling liquid to flow through is arranged in the ceramic bracket. According to the thickness measuring device, the deformation problem of the measuring module and the support connected with the measuring module is solved, and then the situation that the double-face grinding measurement machining thickness is unstable is improved.

The application discloses a tunnel section delay blasting excavation method with grading, layering and porosity linkage, which comprises the following steps: according to the rock strength, integrity coefficient and underground water state of surrounding rock, a tunnel face is divided into several surrounding rock grading areas; an excavation section is divided into several excavation layers along the vertical direction, and the control surrounding rock grade corresponding to each excavation layer is determined; the representative porosity of the rock mass in each layer is measured, and the blast hole arrangement parameters and single-hole charge quantity of each layer are determined; according to the control surrounding rock grade and representative porosity of each excavation layer, the delay blasting time sequence of the blast holes in different positions in each layer is determined, and each blast hole is blasted according to the delay blasting time sequence; after blasting and ventilation, concrete is sprayed to close the rock surface, and a steel arch is installed. The application realizes fine design of blasting parameters and differential control of the section delay blasting time sequence, thereby effectively inhibiting the large deformation of soft rock, reducing the collapse risk, and improving the construction safety and efficiency.

The invention relates to the field of welding processing technology of steel, and discloses a composite welding method of an austenitic stainless steel plate, which comprises the following steps: step 1, preparing two plate materials, and processing the end part of each plate material to form a U-shaped groove and an I-shaped groove; secondly, the groove ends of the two plate materials are assembled to form an assembly body, and the I-shaped grooves of the two plate materials are arranged in an attached mode; 3, the assembly is placed in a working chamber, the assembly is heated to a preset temperature, and the working chamber is vacuumized to a preset vacuum degree; fourthly, the assembly is welded through electron beam welding; 5, machining the excess weld metal of an electron beam welding seam, and enabling the transition position of the U-shaped groove and the I-shaped groove to be in smooth transition; and sixthly, filler wire welding is conducted on the U-shaped groove of the assembly. Therefore, the two plates are welded through the welding method combining electron beam welding and wire filling welding, the welding requirement for the plates with the large thickness (such as the plates with the thickness larger than 160 mm) can be met, and the welding efficiency and the welding seam quality are improved.

The utility model discloses a kind of compression-resistant PVC table cloth, including bottom cloth layer, first PVC layer being compounded on the upper surface of bottom cloth layer, PVC compression-resistant layer being compounded on the upper surface of first PVC layer, second PVC layer being compounded on the upper surface of PVC compression-resistant layer, and surface cloth layer being compounded on the upper surface of second PVC layer;PVC compression-resistant layer includes compression-resistant layer ontology, trapezoidal convex strip being distributed equidistantly on the lower surface of compression-resistant layer ontology, lower trapezoidal embedding groove being arranged between adjacent trapezoidal convex strip, upper trapezoidal embedding groove being arranged directly above trapezoidal convex strip, and compression-resistant buffer cavity being arranged on the two sides of trapezoidal convex strip;The table cloth is compounded between layers by PVC compression-resistant layer and first PVC layer and second PVC layer, and the compression resistance, buffering performance and overall structural stability of the table cloth are significantly improved under the action of compression-resistant buffer cavity.

The invention discloses a large-caliber ion thruster under coupling of a circumferential porous hollow cathode. The large-caliber ion thruster comprises a discharge chamber, the circumferential porous hollow cathode, a cathode pole shoe, a grid electrode assembly and a grid electrode supporting rod. The circumferential porous hollow cathode is provided with a cathode emission end with a closed end surface, and n cathode emission holes are uniformly distributed in the circumferential direction of the cathode emission end; the cathode pole shoe coaxially sleeves the outer sides of the n cathode emission holes; the center of the grid assembly is connected with the closed end face of the cathode transmitting end through a grid supporting rod. The diameter of the gate assembly can be greater than 60 cm. According to the invention, the hollow cathode is changed into a peripheral opening, and an insulating rod-shaped grid electrode support rod extends from the closed end, so that the grid electrode support rod is connected with the center of the grid electrode and plays a role in supporting and fixing the grid electrode. Under the condition that the plasma generation environment in an original discharge chamber is not affected, the stability of the large-diameter thruster grid electrode is effectively improved, deformation caused by the too large diameter is reduced, and the primary electron generation efficiency of the large-diameter thruster grid electrode can be effectively improved.

The invention provides a modular vegetation base material structure for subsidence area abrupt slope repair, and relates to the technical field of subsidence area abrupt slope repair, the modular vegetation base material structure comprises an abrupt slope repair unit, a protection detection unit, an elastic connection unit and a multipurpose limiting unit; the protection detection unit is mounted on the abrupt slope repair unit; the number of the elastic connecting units is four, and the four elastic connecting units are installed on the abrupt slope repairing unit. The number of the multipurpose limiting units is four, the four multipurpose limiting units are installed on the abrupt slope repairing unit, and the multipurpose limiting units are used for limiting the abrupt slope repairing unit. According to the device, a worker can conveniently connect the adjacent abrupt slope repairing frames through the circular connecting shaft, the annular positioning block a and the annular positioning block b, and rapid assembly of the adjacent abrupt slope repairing frames is achieved; the problems that the connection efficiency is affected due to the fact that adjacent vegetation base material structures are connected through bolts generally, and when the vegetation base material structures need to be subjected to angle change, workers cannot control the connection tightness conveniently are solved.

The invention belongs to the technical field of automatic manufacturing, and discloses metal mask frame welding automation equipment which comprises a rack, a first portal frame is fixedly installed at the top end of the rack, a second portal frame is fixedly installed in the rack, and moving frames are movably installed on the outer side of the second portal frame and the outer side of the first portal frame. A movable plate is slidably mounted on one end face of the movable frame, two welding heads are mounted in the movable plate in an embedded mode, the welding directions of the two welding heads are opposite, and a heating plate is fixedly mounted at the position, close to one end of the welding heads, of the back face of the movable plate. According to the scheme, the process of transient heating and cooling and long-time welding is used, local flatness correction is conducted, and the situation that after manual welding, all areas of a product are distorted due to deformation of raw materials or thermal stress diffusion, errors are accumulated and the like and are difficult to remedy is avoided; and work errors of welding personnel can be avoided.

The invention relates to the field of construction, and discloses a waterproof wall-penetrating sleeve structure, comprising a wall-penetrating hole, a wall-penetrating sleeve, a polyurethane sealing tape and an annular steel plate, wherein the wall-penetrating hole is opened on a side wall, the wall-penetrating sleeve is inserted in the wall-penetrating hole, a blocking plate is connected to the left end of the wall-penetrating sleeve, a sealant and waterproof mortar are filled between the outer wall of the wall-penetrating sleeve and the inner wall of the wall-penetrating hole, a first waterproof layer is provided on the side wall at the left end of the wall-penetrating hole, and a second waterproof layer is provided on the outer wall of the left end of the wall-penetrating sleeve; one end of the polyurethane sealing tape is pasted on the first waterproof layer, and the other end is pasted on the second waterproof layer; the annular steel plate is sleeved on the right end of the wall-penetrating sleeve, and a water-expandable water stop strip is provided between the annular steel plate and the side wall. A manufacturing process of the waterproof wall-penetrating sleeve structure is also disclosed, and the wall-penetrating sleeve structure obtained by using the manufacturing process has a strong waterproof effect, can effectively prevent the wall-penetrating sleeve from loosening or leaking, and is convenient for workers to implement.

The present invention relates to the technical field of computer simulation, and discloses a method and system for interactive simulation of fluid and thin film solid, the method comprising: constructing a thin film solid model based on real thin film solid, initializing thin film solid information, and establishing constraints of the thin film solid model; constructing initial information of the fluid based on real fluid, and establishing constraints of the fluid; using a position-based fluid algorithm, calculating the fluid according to the constraints of the fluid, and obtaining relevant information of the fluid; using an extended position-based dynamics algorithm, calculating relevant information of the thin film solid according to the constraints of the thin film solid model; based on the obtained relevant information of the fluid and the thin film solid, performing collision detection and collision response on the fluid and the thin film solid, and correcting the positions of the fluid particles and the thin film solid detected to have collided; and updating the positions of the fluid and the thin film solid. The present invention can perform real-time interactive simulation between fluid and thin film solid.

The invention provides a plugging device and a plugging system comprising the plugging device, the plugging device is used for plugging tissue defects, the plugging device comprises a far-side plugging piece, the far-side plugging piece is used for plugging a far-side notch of the tissue defects, the far-side plugging piece comprises a supporting part and an attaching part, and the supporting part is used for supporting the tissue defects. The fitting part is used for fitting tissue, the supporting part is used for supporting the fitting part, and the hardness of the supporting part is larger than that of the fitting part. The hardness of the supporting part of the far-side plugging piece is larger than that of the attaching part, the flexibility of the attaching part is larger than that of the supporting part, the far-side plugging piece can better conform to the anatomical structure of tissue defect, and the attaching performance and the flow blocking performance of the far-side plugging piece are improved. The supporting part is used for supporting the attaching part, the situation that deformation is too large after the attaching part is attached to the periphery of the tissue defect is avoided, and it is guaranteed that the attaching part can stably achieve the blocking effect at the far-side notch.

The utility model discloses a plate rib type reinforcing structure based on a bolt-sphere joint and a device of the plate rib type reinforcing structure. The plate rib type reinforcing structure based on the bolt-sphere joint comprises joint connecting plates and annular rib plates, the two ends of each joint connecting plate are fixedly connected with the exteriors of two connecting rods in butt joint with the bolt-sphere joint correspondingly, and the joint connecting plates are arranged in the circumferential direction of the connecting rods; the joint connecting plates in the circumferential direction are connected into a whole through the annular rib plates, and the inner ring sides of the annular rib plates abut against the outer side walls of the connecting rods. The plate rib type reinforcing structure based on the bolt-sphere joint is simple in design, easy to produce and manufacture and convenient to construct, the annular rib plate can effectively prevent the rod piece from generating excessive deformation under the action of the joint connecting plate, the joint connecting plate crosses the bolt-sphere joint, welding on a bolt sphere is avoided, and the cost is reduced. And bolt-sphere nodes are replaced to transmit axial pressure or tension of the associated net rack rod pieces, so that firmness and safety of connecting nodes at chord members are guaranteed.

The invention relates to a three-step excavation method for a shallow-buried extremely-soft rock tunnel and a tunnel supporting structure, which ensure that the tunnel is closed to form a ring as soon as possible by strictly controlling the safe step pitch of the tunnel. By means of side wall slotting construction, disturbance of step construction to overall construction of the non-ring-forming tunnel is reduced, structural support of soil in the tunnel is paid attention to in-tunnel soil in the excavation operation process, front-back interference can be effectively reduced, disturbance to stratum soil is relieved, lateral soil pressure and vertical soil pressure in the tunnel excavation process can be effectively resisted through steel pipe pile construction, and construction efficiency is improved. The problems of settlement and large deformation of the tunnel are effectively solved, great potential safety hazards caused by the soft stratum to tunnel construction are eliminated, and the personal safety of constructors and the safety of equipment and property are protected.

The present application discloses an adsorption device for a grinding head, a chemical mechanical grinding device and a control method, wherein the adsorption device comprises: an adsorption film made of an elastic material, the adsorption film having a first surface and a second surface relative to each other, the first surface being used to contact a wafer; wherein the wafer comprises a central area and an edge area surrounding the central area; the adsorption device further comprises an adsorption chamber and a plurality of pressure chambers arranged on the second surface, the adsorption chamber being used to adsorb the edge area; the plurality of pressure chambers being used to be respectively connected to an external pressure supply device, so that each pressure chamber can adjust the pressure therein through an independent pressure supply device, and adjust the pressure applied to the area on the central area opposite to the position of the pressure chamber; wherein some of the pressure chambers are arranged along the circumference of the wafer, and some of the pressure chambers are arranged along the radial direction of the wafer.

The invention provides a steel structure building dry hanging earthenware brick curtain wall construction method, and belongs to the technical field of steel structure buildings, and the steel structure building dry hanging earthenware brick curtain wall construction method comprises the following steps: building a multi-objective optimization model of a steel structure building dry hanging earthenware brick curtain wall, and solving the multi-objective optimization model; cleaning the surface of the steel structural member; according to the optimal arrangement scheme of the reinforcing rigid rib, the reinforcing rigid rib is welded to the surface of the steel structural member, and the surface steel plate is welded to the reinforcing rigid rib and the steel structural member; channel steel is welded on the surface steel plate; fixing angle steel is welded to the steel keel, and connecting angle steel is connected with the fixing angle steel through a bolt set; laying a full-length steel plate on the connecting angle steel; holes are formed in the full-length steel plate, and argil bricks are built on the full-length steel plate according to a standard layer; positioning steel bars are placed in the holes in the argil bricks; and carrying out quality inspection on the dry hanging earthenware brick curtain wall.

The application provides a gas radial bearing and motor, the gas radial bearing comprising: a bearing seat, a top foil, a first layer of wave foil and a second layer of wave foil; the first layer of wave foil comprises a first wave foil located at an axial first position, the second layer of wave foil comprises a second wave foil located at an axial second position and a third wave foil located at an axial third position; the first wave foil comprises first wave foil supporting ends and first wave foil flat sections alternately arranged along a circumferential direction, the second wave foil also comprises second wave foil supporting ends and second wave foil flat sections alternately arranged along the circumferential direction, and the third wave foil also comprises third wave foil supporting ends and third wave foil flat sections alternately arranged along the circumferential direction; and the arch height of the first wave foil supporting end is less than the arch height of the second wave foil supporting end, and the arch height of the first wave foil supporting end is less than the arch height of the third wave foil supporting end. According to the application, the gas film thickness at the middle position is effectively increased, the bearing carrying stiffness is improved, the bearing end leakage is reduced, and the carrying capacity is improved.

The invention discloses Mn-Cr-V-N series high-strength plastic air-cooled hardened steel and a preparation method thereof, and the Mn-Cr-V-N series high-strength plastic air-cooled hardened steel comprises the following components in percentage by mass: 0.46 to 0.55 percent of C, 0.5 to 1.0 percent of Si, 1.51 to 2.51 percent of Mn, 2.51 to 3.51 percent of Cr, 0.21 to 0.36 percent of V, 0.02 to 0.10 percent of N, less than 0.01 percent of P and S, and the balance of Fe. The preparation process comprises the steps of smelting, forging, hot rolling, cold rolling, annealing and air cooling quenching. The invention relates to the technical field of ultra-high-strength steel and processing thereof, the air-cooled hardened steel with the tensile strength higher than 2100 MPa and the ductility higher than 10.0% is prepared, and compared with the prior art, the material prepared through the method has the advantages of ultra-high strength, high toughness and oxidation resistance, industrial large-scale production is easy, and wide development and application prospects are achieved.

This application discloses a rectifying electrostatic precipitator, belonging to the field of dust collector technology. By sequentially setting a guide layer, a mixing layer, and a stabilizing layer in the inlet conical section of the outer shell, multiple airfoil-shaped guide elements in the guide layer evenly distribute the airflow, directing it across the entire inlet conical section of the outer shell. Multiple sets of grid holes in the mixing layer employ a staggered grid design to break up large-scale eddies in the flue gas guided by the guide layer, reducing them to smaller sizes and achieving initial velocity equilibrium. The stabilizing layer features a honeycomb open-cell design; the honeycomb structure effectively manages the airflow and stabilizes the velocity. Thus, the flue gas undergoes a three-stage process of "guidance-breakup-management" to achieve refined flow field treatment, improve velocity distribution uniformity, and reduce inlet local resistance.