32 results about "Metallic membrane" patented technology

The invention provides a finite element analysis method and system for geometric design of a flow regulating valve, and relates to the technical field of data processing.The method comprises the steps that 1, spatial geometric feature analysis is conducted on each data point in a discrete contour coordinate dataset, the principal curvature value of each data point on the sealing surface of a metal diaphragm is solved, and the principal curvature value of each data point is calculated; determining a point with the maximum average curvature value on the sealing surface of the metal diaphragm as a core morphology reference point; step 2, establishing a local coordinate system by taking the core morphology reference point as an original point, screening four sealing state points from the discrete contour coordinate data set, solving a corresponding space plane equation, and calculating a space intersection line between the space plane and the sealing surface of the metal diaphragm; according to the method, through accurate positioning of the core reference point, definition of the analysis sub-domain, grid division, mechanical solution, leakage rate calculation and parameter optimization, the dynamic particulate matter problem is effectively improved, and the sealing performance and the micro flow adjusting precision are improved.

The application provides an electromagnetic shock wave generator, comprising an electromagnetic generating assembly and an electromagnetic induction assembly, the electromagnetic generating assembly is arranged on one side of the electromagnetic induction assembly; wherein the electromagnetic generating assembly comprises a coil and a conductive piece connected with each other, the electromagnetic induction assembly comprises a clamping piece and a metal diaphragm fixed at least partially to the periphery of the clamping piece, the metal diaphragm is arranged on one side of the coil and can vibrate under the action of the coil; wherein a metal sheet is arranged on the side of the metal diaphragm away from the coil, the radial dimension of the metal sheet is smaller than the radial dimension of the metal diaphragm, and the metal sheet is arranged at the middle part of the metal diaphragm. The electromagnetic shock wave generator provided by the application can generate shock waves, and the metal diaphragm generating the shock waves will not be damaged due to external microjet impact and other factors, meanwhile, the shock waves will not be excessively lost, the service life is prolonged and the functionality is not reduced.

This invention pertains to photothermal evaporation and its water purification, specifically relating to a biochar metal membrane. It is composed of a copper foam mesh, titanium acetylacetonate, lychee charcoal, and alcohol. The composition, by mass, includes one sheet of copper foam mesh, 75g of alcohol, 2g of lychee charcoal, and 0.2g of titanium acetylacetonate. The invention also discloses a method for preparing the biochar metal membrane, specifically involving: stirring titanium acetylacetonate and lychee charcoal in alcohol; immersing the copper foam mesh in the solution repeatedly for several dozen times to obtain a hydrophilic biochar metal membrane. The XRD and contact angle images of the obtained hydrophilic biochar metal membrane are shown in Figure 1a. The prepared biochar metal membrane has a porous structure, further enhancing its photothermal performance. This invention also discloses the photothermal evaporation performance of the biochar metal membrane and its application in seawater desalination. The biochar metal membrane of this invention is non-salt-accumulating, hydrophilic, and possesses highly efficient photothermal performance, enabling its application in multiple fields.

The utility model belongs to the technical field of metal material fatigue tests, and particularly relates to a testing device for diaphragm compressor research and development, which comprises a support and a testing assembly, the support is a rectangular frame-shaped support, clamping assemblies are arranged in the middle of the inner side of a left frame and the middle of the inner side of a right frame of the support, and the testing assembly comprises a hydraulic cylinder and a testing mold. The fixed end of the hydraulic cylinder is connected with the inner side of an upper side frame of the support, the telescopic end of the hydraulic cylinder is connected with the upper side of the test mold, the test mold comprises an upper mold, a lower mold and a connecting plate, and the connecting plate is fixedly connected with the rear sides of the upper mold and the lower mold. And a periodic load test is carried out, and the stress state of the compressor in actual service is simulated to the greatest extent, so that the data of the symmetric bending fatigue test of the metal diaphragm is true and credible.

A device for descaling a metallic membrane of a tank for transporting and / or storing gas in liquid form includes: a rail secured to the metallic membrane; a head projecting a laser beam to descale the metallic membrane; a support interposed between the projection head and the rail and traveling along the rail; and a device allowing a movement with respect to the metallic membrane of a point of impact of the laser beam on the metallic membrane, the movement being different from the travel effected by the support on the rail.

The utility model relates to the technical field of terahertz communication, in particular to a terahertz waveguide cavity filter, which solves the problem of high waveguide processing difficulty in the prior art. Comprising an upper metal shell and a lower metal shell which are connected with each other, an upper through groove is formed in the upper metal shell, a lower through groove is formed in the lower metal shell, the upper through groove and the lower through groove are oppositely arranged to form a rectangular waveguide, and a metal diaphragm is arranged in the rectangular waveguide; and a positioning assembly is arranged between the upper metal shell and the lower metal shell. The filter has the beneficial effects that an equivalent filter circuit is formed in a rectangular waveguide cavity by adopting a metal diaphragm in the filter, so that a filter resonance circuit is realized; the rectangular waveguide is coherent, regular in structure and low in processing difficulty; the positioning assembly ensures that the relative position of the upper metal shell and the lower metal shell is accurate when the upper metal shell and the lower metal shell are connected, thereby ensuring that the upper through groove and the lower through groove are accurately aligned, ensuring that the structure of the rectangular waveguide is complete, and facilitating the assembly of the filter.

The invention relates to a metal membrane piece position correction method and system based on improved template matching. The method comprises the steps that an adaptive Retinex algorithm is combined with a DnCNN denoising network to carry out image preprocessing; fusing an ASIFT algorithm and a SuperPoint network to extract feature points and a confidence map; initial matching is realized by using the FREAK descriptor and the weighted Hamming distance, and initial mismatching is filtered based on a bidirectional nearest neighbor criterion; designing a double-layer filtering mechanism in which Guided-PROSAC and local topological structure verification are combined to eliminate mismatching; mapping angular points of the template image to a target image to calculate a pose error vector; the pose error vector is transmitted to a mechanical arm controller for metal diaphragm piece position correction; according to the method, the real-time requirement of a production line is met through reasoning on edge equipment, multiple defects of the traditional technology in the aspects of robustness, precision and automatic integration are overcome, and reliable technical support is provided for a precise assembly task in intelligent manufacturing.

The invention provides a redundant sealing diaphragm capsule and an inflation device and method thereof. The diaphragm capsule is used for longitudinal coupling pulsation suppression of spacecraft and carrier rocket propulsion systems. The multiple layers of metal diaphragms are installed in the shell after being welded and stacked through electron beams, a cavity is formed between the multiple layers of stacked metal diaphragms and the upper end cover, and the cavity is used for storing compressed gas with certain pressure; the compressed air is used for longitudinal coupling pulsation suppression. The valve element is of a non-metal structure. The valve element and the valve seat are pressed tightly under the acting force of the spring, and the conical surface structure on the valve element and the conical surface structure of the valve seat form a first seal. And the nonmetal O rubber ring on the valve core and the conical surface structure of the valve seat form a second seal, and the two seals are redundant to each other, so that the sealing reliability of the diaphragm capsule is improved. The inflating device is favorable for improving the inflating efficiency of the multiple diaphragm capsules, and effectively reduces the pressure drop of the diaphragm capsules during recovery after the inflation is completed.

The invention provides a metal film type gas sampling device. The metal film type gas sampling device comprises an electromagnet, an ejector pin assembly, a sampling device main body and a metal film, a movable pipeline penetrating through two ends of the sampling device main body is arranged in the sampling device main body, the electromagnet is in airtight connection with a first end of the sampling device main body and is aligned with a corresponding opening of the movable pipeline at the end, and the metal film covers an opening of the movable pipeline at a second end of the sampling device main body; the electromagnet comprises a push rod and a coil, the coil is used for driving the push rod to move in the axial direction, the end of the push rod is fixedly connected with the ejector pin through a connecting piece, and the ejector pin assembly is coaxial with the movable pipeline and can reciprocate in the movable pipeline; the sampling device main body is also provided with a sampling branch communicated with the movable pipeline, and the sampling branch is provided with a sampling chamber for storing sampling gas. By adopting a matching structure of the ejector pin assembly and the metal film, the electromagnet receives an external electric control signal and then drives the ejector pin to puncture the metal film, so that instantaneous sampling of gas in a closed container cylinder is realized.

In order to solve the technical problem that an existing metal diaphragm polarizer manufacturing method is not suitable for batch production and manufacturing of frequency bands, the invention provides a high-precision Q / V frequency band metal diaphragm polarizer. A polarization section in an inner core of the polarizer is divided into a plurality of polarization sheets with equal outer section circles, step pin positioning holes are formed in the positions, close to the outer section circles, of the end faces of the polarization sheets, the polarization sheets are sequentially installed on step pins through the step pin positioning holes, and then the polarization sheets are integrally placed into an outer sleeve of the polarizer. And the fixed connection between the polarizer inner core and the polarizer outer sleeve is realized in a screw crimping manner. According to the multi-layer polarization sheet laminated structure, integrated processing of the polarizer is avoided. As each polarization sheet is of an annular sheet structure, the structural form is simple, high-precision machining of the metal diaphragm on the inner cavity of the polarization sheet can be realized by adopting common machining, and compared with an integral polarizer, the processing difficulty of a single polarization sheet is obviously reduced, and the processing precision and the processing efficiency are obviously improved.

The application discloses a multi-arm diaphragm loading type variable polarizer, and aims at solving the defects of low power capacity of existing dielectric plate variable polarizer and ferrite variable polarizer. The application is composed of a multi-arm mode converter and two diaphragm loading type circular polarizers. The circular waveguide section of the multi-arm mode converter is connected with the first diaphragm loading type circular polarizer, and the circular waveguide section of the second diaphragm loading type circular polarizer is connected with the second diaphragm loading type circular polarizer. The multi-arm mode converter is composed of a power division structure, a power combination structure and N E-plane bent waveguides. The two diaphragm loading type circular polarizers are completely same and are composed of circular waveguides and metal diaphragms. The metal diaphragms are symmetrically welded on the inner walls of the third circular waveguides and present solid ship shapes. The application has high mode conversion efficiency, and the transmission efficiency at the central frequency is more than 99%. The application has simple structure, and the variable polarization function is easy to realize, and the power capacity of GW level can be realized.

The application provides a flow regulating valve geometry finite element analysis method and system, and relates to the technical field of data processing.The method comprises the following steps: step 1, spatial geometry feature analysis is performed on each data point in a discrete profile coordinate data set, the principal curvature value of each data point on the metal diaphragm sealing surface is solved, the point with the maximum average curvature value on the metal diaphragm sealing surface is determined as a core topography reference point; step 2, a local coordinate system is established with the core topography reference point as the origin, four sealing state points are screened from the discrete profile coordinate data set, the corresponding spatial plane equation is solved, and the spatial intersection line between the spatial plane and the metal diaphragm sealing surface is calculated. Through accurate positioning of the core reference point, definition of the analysis subdomain, mesh division, mechanical solving, leakage rate calculation and parameter optimization, the application effectively improves the dynamic particulate matter problem, improves the sealing performance and micro flow regulating precision.

The invention relates to a semiconductor device, a preparation method and an electrical system. Disclosed is a semiconductor device comprising: a semiconductor substrate comprising at least one power semiconductor device; the insulating diaphragm is arranged on the semiconductor substrate and is provided with at least one first opening penetrating through the insulating diaphragm, and the at least one first opening enables the corresponding first part of the semiconductor substrate to be exposed; at least one electrically conductive attachment member filled in a corresponding one of the at least one first opening; and a metal diaphragm disposed on the insulating diaphragm and the at least one attachment member, where the at least one attachment member joins and electrically connects a respective portion of the metal diaphragm with a respective first portion of the semiconductor substrate.

The invention belongs to the technical field of high-temperature dynamic pressure measurement and high-temperature airtight packaging. According to the high-sensitivity broadband response piezoelectric type high-temperature pressure sensor and the assembling method, a pressure-force conversion structure of a force transmission center column-annular metal diaphragm, a piezoelectric signal generation part formed by stacking a plurality of pieces of reverse polarization in parallel and an acceleration compensation part based on an acceleration compensation inertial mass block are integrated on the same axial force transmission link; and high-temperature reliable wire leading is realized by adopting a vacuum brazing airtight connector of a kovar alloy contact pin, an aluminum oxide ceramic tube and a metal shell. The shell of the sensor is preferably made of high-temperature alloy, and multi-stage sealing is formed through vacuum brazing and laser welding, so that the sensitive element works in a closed inner cavity with high insulation and low leakage rate for a long time. According to the invention, the contact rigidity and the charge acquisition stability are improved, the typical sensitivity can be greater than 1pC / kPa, the frequency response upper limit can reach 6000 Hz, and the sensitivity drift can be controlled within 5% after long-term aging under the condition of 500 DEG C.

The utility model provides a kind of diffusion silicon pressure sensor, comprising: pedestal, metal needle is provided on the pedestal;Process joint, including first end and second end, installation cavity is provided in the second end of process joint, pressure sensitive chip is provided in installation cavity, the pressure sensitive chip is blocked in the pedestal by the pedestal, the pressure sensitive chip is electrically connected between the metal needle;Metal diaphragm, set in the first end of process joint, for inserting measured medium, and measured medium pressure is transferred to the pressure sensitive chip;The circumference of the metal diaphragm is welded between the first end of process joint and seals.This scheme solves the frost heaving failure problem that has long plagued diffusion silicon pressure sensor in the way of simple and efficient, brings significant improvement in reliability, cost, process and application range etc.

The utility model relates to a sodium medium gate valve with real-time leakage monitoring function, belonging to the valve technical field of fourth generation sodium-cooled fast reactor. It includes that the first seal is formed between the valve body and the valve cover through the extruded metal seal ring, the metal diaphragm assembly and the graphite ring are installed in the valve cover and the valve body connection place from top to bottom in turn, the valve cover guard frame forms the second seal through the extruded metal diaphragm assembly and the graphite ring, the valve rod is wrapped in the bellows and forms the third seal below the packing box, and the packing group is arranged between the valve rod and the packing box and forms the fourth seal. The first sodium leakage monitoring assembly is arranged between the first seal and the second seal, and the second sodium leakage monitoring assembly is arranged between the third seal and the fourth seal, which solves the technical problems that the existing lip seal weld seam is prone to fatigue failure under the cold and hot cycle impact, leading to sodium liquid leakage, and the on-site maintenance is limited, and the sodium-cooled freeze seal is prone to oxide crystallization, leading to the valve rod seizure and jam, and the friction force is large, affecting the driving stability, and improves the operation safety and continuity.

The invention relates to the technical field of microwave devices, in particular to a Ku wave band traveling wave power splitter and combiner based on a double-ridge waveguide coupler and a design method thereof, and the splitter comprises an input rectangular waveguide, and a multi-stage double-ridge waveguide coupler, a stepped impedance matching network and a short circuit terminal which are sequentially arranged along the longitudinal direction of the input rectangular waveguide; the double-ridge waveguide coupler comprises a ridge waveguide, a metal probe and a metal diaphragm, the metal probe extends into the input rectangular waveguide to form a coupling structure, and the metal diaphragm is arranged behind the ridge waveguide probe to counteract residual susceptance introduced by the probe; the stepped impedance matching network is connected with the output end of the double-ridge waveguide coupler and is used for converting the quasi TEM mode of the ridge waveguide into the TE10 mode of the rectangular waveguide; and the short-circuit terminal is arranged on one side, far away from the input end, of the double-ridge waveguide coupler to form a traveling wave transmission structure. Through equivalent circuit optimization and output waveguide equal-length design, phase consistency of all output signals is ensured.

The utility model relates to the technical field of pressure sensors, in particular to a pressure sensor, which comprises a shell, one end of the shell is open, the other end of the shell is provided with a metal diaphragm, and a support ring, a mounting substrate, a hold-down ring, a first taper sleeve, a second taper sleeve and a sealing cover are sequentially arranged in the shell from inside to outside. Compared with the prior art, the MEMS chip has the advantages that the shell and the metal diaphragm are arranged, so that the shell can be conveniently mounted on external equipment, the supporting ring, the mounting substrate, the pressing ring, the first taper sleeve, the second taper sleeve and the sealing cover are arranged, so that a quick dismounting structure can be conveniently formed, when the MEMS chip fails, the sealing cover is dismounted, then the easy-to-pull rope is hooked, and the MEMS chip can be quickly dismounted. The first taper sleeve and the second taper sleeve can be conveniently taken down as a whole, then a tool is used for being connected with the notch in a clamped mode, then the pressing ring is driven to rotate out, the installation base plate is replaced, the overall structure is simple, design is reasonable, and therefore the problems existing in the prior art are effectively solved.

The invention relates to a metal diaphragm piece position correction method and system based on YOLOv8 improvement, and the method comprises the steps: designing a conventional YOLOv8 target detection model structure which is improved by fusing feature-level super-resolution with an FSR mechanism, and is specially used for recognizing feature key points in a metal diaphragm piece image so as to determine a placement posture; a loss function of a traditional YOLOv8 is improved based on a gradient equalization mechanism GHM, contribution of difficult-to-separate samples and easy-to-separate samples to model training is further balanced, and extreme sample interference is reduced; an IoU-Guidded NMS mechanism is designed to optimize screening of key point candidate frames, and the redundancy suppression effect of key point detection results is optimized; various monitoring indexes are designed to train a metal diaphragm piece position correction network, lightweight packaging and deployment are carried out, mechanical arm linkage control is carried out, and metal diaphragm piece position correction is achieved. The method can be widely applied to the fields of electronic manufacturing, automatic assembly and the like, and the problems of low manual adjustment efficiency and large positioning deviation of the metal diaphragm piece are solved.

This utility model discloses a grooved and slotted combination low-pressure rupture disc, relating to the technical field of safety pressure relief devices. It includes a slotted metal diaphragm, a grooved metal diaphragm, and a bracket assembly. By replacing the traditional non-metallic sealing diaphragm with a grooved metal diaphragm, the maximum operating temperature of the rupture disc is increased from 260℃ to 530℃, completely solving the problem of inability to select the right type for high-temperature, low-pressure conditions. The metal sealing surface is unaffected by burrs, particles, or coal slag punctures, eliminating the risks of leakage and aging associated with non-metallic diaphragms, and significantly extending its service life. The slotted metal diaphragm is responsible for precisely controlling the burst pressure, while the grooved metal diaphragm only serves as a seal and assists in rupture; therefore, the requirements for groove depth accuracy are less stringent, significantly reducing processing difficulty and testing costs. The rupture disc is a three-layer resistance-welded composite component, requiring no additional cooling and insulation devices, without altering the original pipeline layout. The installation space is consistent with traditional low-pressure rupture discs, making maintenance and replacement simple.

The utility model discloses a kind of optical fiber LMR pressure sensors, comprising: metal shell, its shell top is open, which is covered with metal diaphragm, the bottom end surface center of metal diaphragm is fixed with force transmission metal stick, the lower end of force transmission metal stick is deposited with fluoride layer, fluoride layer is deposited with gallium-doped zinc oxide film layer;Single-mode optical fiber, it is located in metal shell, the cladding of single-mode optical fiber removes middle section to expose the fiber core of middle section;Side surface opening microcapillary, it is cladded on the cladding of single-mode optical fiber both ends, microcapillary is filled with matching liquid with same refractive index and will be immersed with cladding, matching liquid can be as the liquid cladding of bare core;Gallium-doped zinc oxide film layer is located above liquid cladding, the space range between gallium-doped zinc oxide film layer and bare core is called transition layer. The sensor can avoid the influence of stress transmission on optical fiber, both have relatively wide sensing range, and also can ensure higher sensitivity.

This utility model discloses a quaternary pump structure for liquid transportation, including a transportation component. The transportation component includes a connecting pipe, a suction chamber, a degassing membrane, a mounting base, a proportional valve, a mixing chamber, a spiral blade, a high-pressure pump, a delivery pipe, a housing, an elastic metal diaphragm, and a distributor pipe. A suction chamber is provided outside the connecting pipe, and four connecting pipes are evenly installed on the mounting base. A miniature vacuum pump is installed on the top of the suction chamber. A degassing membrane is fixedly connected to the inner wall of the connecting pipe, and a proportional valve is installed on the connecting pipe. This utility model, by setting a degassing membrane inside the connecting pipe and combining it with the suction chamber and the miniature vacuum pump, can effectively remove air bubbles from the liquid, improving the accuracy and stability of liquid transportation. The spiral blade in the mixing chamber enhances the turbulence effect of the liquid flow, promoting thorough mixing of components and improving mixing uniformity. The combined use of the high-pressure pump and the elastic metal diaphragm buffers pressure fluctuations, ensuring stable output liquid pressure.

This application provides a fixed electrode and a capacitive thin-film vacuum gauge. The fixed electrode is formed by setting an inner ring plating layer and an outer ring plating layer on the substrate surface, and setting an isolation plating layer between the two and / or outside the outer ring plating layer, so that the inner ring plating layer, the outer ring plating layer and the isolation plating layer form a partitioned arrangement structure on the substrate surface. The isolation plating layer is electrically connected to the ground terminal, which can form a stable electric field shielding boundary between the inner ring plating layer and the outer ring plating layer, thereby limiting the propagation path of the electric field in the edge region and reducing the electric field coupling effect between the inner ring plating layer and the outer ring plating layer. On this basis, when the metal diaphragm undergoes elastic deformation as a variable electrode and causes capacitance change, the additional capacitance interference introduced by electric field coupling can be reduced, the independence of the capacitance measurement signals corresponding to the inner ring plating layer and the outer ring plating layer can be improved, thereby improving the stability and consistency of capacitance measurement.

The microporous atomization sheet comprises a piezoelectric ceramic ring sheet and a metal membrane sheet which are arranged in a stacked mode, an atomization area is formed on the metal membrane sheet, the piezoelectric ceramic ring sheet is arranged on the outer side of the atomization area of the metal membrane sheet through a glue layer, and the piezoelectric ceramic ring sheet is arranged on the outer side of the atomization area of the metal membrane sheet. An exhaust hole is formed in the surface, deviating from the piezoelectric ceramic ring piece, of the metal diaphragm, and the exhaust hole is used for being communicated with the glue layer so that bubbles in glue forming the glue layer can be exhausted through the exhaust hole. According to the microporous atomizer, the problem that contact impedance is increased due to bubbles is avoided while stable arrangement of the piezoelectric ceramic ring piece on the metal diaphragm is achieved, and the atomization effect of the microporous atomizer is guaranteed.

The application provides a system and method for measuring stress-strain relationship of a metal diaphragm in a rapid pressure boosting scene, wherein the system comprises: a firing electrode arranged in an explosion container and connected with a transformer circuit; a vacuum pump, an explosive gas cylinder and an oxidizing agent gas cylinder connected with the explosion container through pipelines respectively; a pressure sensor and a pressure gauge installed on the explosion container respectively; the pressure sensor is signal-connected with a data acquisition device; a computer terminal is signal-connected with the data acquisition device and the transformer respectively; the explosion container is provided with a first connecting pipe and a second connecting pipe, the first connecting pipe is used for installing a to-be-tested rupture disc, and the second connecting pipe is used for installing a sacrificial rupture disc. The system is used for measuring a test, and the real strain ε ei and the real stress σ ei of the to-be-tested rupture disc at an arch top corresponding to different explosion overpressure are calculated to draw a σ ei -ε ei curve, so that the real stress-strain relationship of the material in the diaphragm expansion process can be obtained.

The invention discloses a piezoelectric atomization piece and piezoelectric atomization device.The piezoelectric atomization piece comprises a piezoelectric ceramic ring piece and a metal diaphragm, the piezoelectric ceramic ring piece is arranged on the surface of the metal diaphragm, and the piezoelectric ceramic ring piece is used for generating periodic deformation under the action of alternating voltage so that the metal diaphragm can vibrate; the metal diaphragm is provided with a plurality of mist outlet holes in the inner circle area of the piezoelectric ceramic ring piece, each mist outlet hole comprises an atomization hole and a flow guide hole which are arranged back to back and communicate with each other, and the flow guide holes are used for guiding deposited liquid drops to the atomization holes so that the liquid drops can flow out after being atomized in the atomization holes. The vibration resistance of the metal diaphragm caused by deposition of a large number of liquid drops is avoided, so that the stable atomization effect on liquid is guaranteed, and the atomization requirement of a user is met.

The invention discloses a high-purity titanium metal diaphragm for a spaceflight propellant storage tank and a preparation method thereof.The preparation method comprises the steps that high-purity titanium with the titanium element content being not lower than 99.995% in metal elements serves as a raw material, and the preparation method comprises the steps that forging, hot rolling, cold rolling and heat treatment are sequentially conducted on the high-purity titanium to obtain a high-purity titanium plate; the heat treatment is stepped multi-section heat preservation heat treatment, and stepped heat preservation of not less than 3 gradients is carried out within the range of 300-680 DEG C; the high-purity titanium plate is machined and formed, and meanwhile heat treatment is conducted; and machining the formed plate by adopting a double-sided machining technology to obtain the product. The obtained high-purity titanium metal diaphragm has lower tensile strength and yield strength, and the elongation is greatly improved to 77.5%. The polygonal instability resistance pressure of the metal diaphragm in the overturning process is obviously improved, reliable overturning is achieved, and the metal diaphragm can be better applied to a storage tank of a spaceflight liquid propeller.

The invention relates to the technical field of aerospace and aviation engineering, in particular to a metal diaphragm overturning performance simulation analysis method based on a random distribution thickness method, which comprises the following steps of: establishing a parameterized metal diaphragm finite element modeling GUI (Graphical User Interface); based on the linear thickness distribution function, parameterizing to generate an initial geometric model and a finite element model of the metal diaphragm; constructing a random thickness deviation assignment GUI (Graphical User Interface), randomly selecting a unit set according to a set proportion through a random function, respectively endowing thickening and thinning thickness deviations, and simulating thickness unevenness caused by an actual process; and an explicit dynamics method is adopted to simulate and analyze the overturning process of the diaphragm under different deviation conditions, and a wrinkle behavior and a vertex transverse displacement change rule are obtained. According to the method, the random thickness deviation is incorporated into a simulation system, so that the simulation precision and the actual working condition adaptability can be improved; rapid modeling is realized through parameterized GUI, so that the simulation efficiency can be improved; the method is suitable for parametric modeling and fine design of the metal diaphragm.

An energy storage cell includes a housing comprising a metallic, tubular housing with a circular opening. The energy storage cell further includes an electrode-separator assembly winding having two terminal end faces and a wound jacket, the electrode-separator assembly comprising an anode, a cathode, and a separator. The energy storage cell additionally includes an at least partly metallic contact element in direct contact with and connected to current collector by welding. The contact element comprises a circular edge and closes the terminal circular opening of the tubular housing portion in a gas- and liquid-tight manner. The contact element is or comprises a metallic membrane electrically connected to a current collector. The metallic membrane is configured to, in response to a pressure in the housing exceeding a threshold, bend such that electrical contact between the contact element and the current collector is lost.

The application discloses a 3D printable Ka-band waveguide filter, which comprises a pentagonal resonant body, the pentagonal resonant body comprises a rectangular resonant body and a triangular resonant body which are integrally connected in communication; one end of the rectangular resonant body is integrally connected with an input resonator, and the other end of the rectangular resonant body is integrally connected with an output resonator; a plurality of electroplating holes are arranged on the side wall of the triangular resonant body and close to the top corner; and a metal diaphragm divides the pentagonal resonant body into a plurality of pentagonal resonators. The Ka-band waveguide filter is based on a metal 3D printing process, a plurality of electroplating holes are arranged on the side wall of the triangular resonant body and close to the top corner, and on the basis of ensuring that electromagnetic waves do not leak and do not affect the overall electrical performance of the filter, liquid can sufficiently flow in the Ka-band waveguide filter during chemical electroplating in the later stage, so that the purpose of sufficient electroplating is achieved.