17results about How to "Overcome stress" patented technology

The utility model discloses a photovoltaic support structure of a super-large span cable-stayed string truss combined system, which comprises a space net-shaped truss suspended above a spanning area and tower column foundations arranged at two ends of the spanning area, the tower column foundations are pre-buried and fixed underground, and tower column bodies are mounted on the tower column foundations. Each tower column body is provided with a plurality of stay cables, the stay cables are connected with the spatial net-shaped truss, and the spatial net-shaped truss is used for laying photovoltaic panels. According to the utility model, the tower column body and the stay cables on the tower column body are mutually connected with the string truss, so that the rigidity of the structure is ensured, the large-span requirement of more special sites can be met, and the popularization and application of the photovoltaic technology are facilitated.

The utility model discloses a hollow arch board for building construction, including board main body, and board main body is integrally extruded by light material, the board main body is as a whole arch structure, and is equipped with arch toe on both sides, the board main body is hollow structure, and is equipped with a plurality of webs inside, and the web divides the board main body inside into multiple continuous rectangular, triangle or trapezoidal hollow cavities, the utility model discloses integrally extruded by light material such as PVC or aluminum alloy, has reduced the dead weight of board significantly, and the board is as a whole arch structure, and then combines the web set up inside, has formed the stable mechanical structure, can effectively disperse pressure, has avoided the problem that the bending stiffness of flat plate structure is low and can not satisfy the bearing demand.

The invention provides a device for eliminating the residual stress of a turbine disc, and the device comprises a restraining part which comprises a fixed disc which is provided with a plurality of rails extending in the radial direction; the multiple moving assemblies are arranged on the rails correspondingly, extend in the direction parallel to the axial direction of the turbine disc and abut against the rim of the turbine disc; the internal expansion type clamp is in internal expansion fit with the inner diameter of the turbine disc; the driving part is connected with the internal expansion type clamp; and the control part is electrically connected with the moving assembly, and in the process that the inner diameter of the turbine disc is expanded by the internal expansion type clamp, the control part controls the moving assembly to prevent the rim of the turbine disc from deforming based on the pushing force of the rim of the turbine disc for pushing the moving assembly, and controls the driving part to drive the turbine disc to rotate so as to eliminate the residual stress of the turbine disc.

The invention provides an intelligent pneumoperitoneum system with dynamic smoke removal and constant pressure functions and a using method, the intelligent pneumoperitoneum system comprises a suction and pneumoperitoneum all-in-one machine and a double-cavity aspirator head, the suction and pneumoperitoneum all-in-one machine comprises a shell and a containing space located in the shell, and a control module, a gas supply channel and a gas recovery and purification channel are arranged in the shell; the double-cavity aspirator head is connected with the gas supply passage and the gas recovery and purification passage; the system collects smoke concentration and pressure signals in the abdominal cavity in real time through the smoke concentration detection module and the outlet pressure gauge which are integrated in the double-cavity aspirator head and feeds back the smoke concentration and pressure signals to the control module. The control module constructs a closed-loop control algorithm based on an ideal gas state equation, the suction power of the suction module and the gas inlet rate of the pressure regulating module are dynamically and cooperatively regulated, and rapid removal of smoke in an operation and dynamic stability of pneumoperitoneum pressure are achieved. Two-stage waste gas filtration is integrated, it is ensured that exhausted gas is harmless, and the integrated guarantee of clear surgical view, coherent operation and patient safety is achieved.

This invention relates to the field of oilfield chemistry, and discloses a fracturing fluid drag-reducing agent composition, its preparation method, and its application. The drag-reducing agent composition comprises cis-15-tetracosenoic acid and a polymer; the polymer comprises polymer A and polymer B, polymer A comprising structural unit A from formula (1), and polymer B comprising structural unit B from formula (2); formula (1); formula (2); wherein R1 is substituted or unsubstituted C 12 -C 20 R1 is an alkyl group; R2 is an unsubstituted C1-C4 alkyl group; X is selected from positive integers from 6 to 14; R3 is H or a C1-C3 alkyl group. The drag-reducing agent composition can maintain drag-reducing performance and improve oil recovery over a wide temperature range.

This invention relates to the field of grouting technology, specifically disclosing an adaptive micro-expansion organic-inorganic hybrid grouting and sealing material and its preparation method, which consists of two components, A and B: Component A is a pumpable viscous liquid, comprising the following components by weight: 90-110 parts of castor oil-based polyurethane prepolymer, 5-15 parts of sulfonate-modified nano-montmorillonite, 8-15 parts of plasticizer, and 3-8 parts of functional nanofibers; Component B is a free-flowing solid powder, which is a microencapsulated water-based curing agent, used in an amount of 10-30 parts by weight. This invention utilizes the ordered interlayer water absorption characteristics of sulfonate-modified nano-montmorillonite to achieve mild and controllable micro-expansion upon contact with water, effectively overcoming the risks of excessive internal stress and structural damage caused by the violent and uncontrollable foaming of traditional hydrophilic materials, ensuring the safety and effectiveness of filling in a closed base plate environment.

The invention provides a high-pressure durability test method for a hydraulic fluid module. The high-pressure durability test method comprises the following steps: acquiring target test pressure and target pulse frequency of the hydraulic fluid module; calculating a minimum fluid volume required by a test element based on this; a metal cylinder and an optional metal ball are filled in an inner cavity of the test element, and the actual effective fluid volume of the test element is adjusted to meet the minimum volume requirement; connecting a test system, injecting and heating a test medium, and then applying a pulse pressure waveform conforming to a target parameter to carry out a durability test; and finally, judging the durability of the test element by monitoring whether the test element leaks or not. By actively and accurately adjusting the effective fluid volume of the test element, effective formation and stable transmission of the high-pressure pulse waveform are ensured, and the reliability and accuracy of the fatigue life test of the hydraulic element under the high-pressure working condition are remarkably improved.

The invention relates to an optical element testing system, in particular to an optical element performance testing system and method based on ultralow-temperature high-vacuum coupling, and aims to solve the problem that an existing testing system cannot test the performance of an optical element while simulating an ultralow-temperature and ultrahigh-vacuum sequential coupling environment. Precision testing equipment is protected, and all-parameter and multi-attitude stable and accurate testing of the optical element is achieved. The system comprises a testing container and a tested container which are communicated with each other, and a high-reflectivity one-way film evaporation container is arranged in the testing container and used for slowing down temperature and pressure sudden change during vacuumizing so as to protect internal testing equipment; a contact type optical element clamping cold box is arranged in the tested container, is connected with the optical element through a flexible cold chain, and is matched with a liquid nitrogen / gas nitrogen system to realize proportional temperature regulation. The device can safely and truly simulate the extreme environment of a spaceflight deep space, and achieves the stable and accurate testing of all parameters and multiple attitudes of the optical element.

The invention provides a rock direct shear experiment device capable of simulating a water-force-heat three-field coupling environment, and belongs to the technical field of rock tests.The rock direct shear experiment device comprises a sealed test box, and the sealed test box is composed of a test box body stress frame, a shear box, a high-temperature loading unit, a confining pressure loading unit and a hydraulic fracturing unit; the shear box is arranged in the test box main body stress frame, and the high-temperature loading unit, the hydraulic fracturing unit and the confining pressure loading unit are all arranged on the outer side of the shear box. The device provided by the invention can realize a multi-field coupling rock shear test, and solves the problem that in the prior art, an experiment can only be carried out under a single physical field condition and the coupling effect of three environments of water, force and heat cannot be effectively simulated; and a technical support is provided for developing the subject research of multi-field coupling environment deep rock mass engineering such as deep terrestrial heat and the like.

The present invention belongs to the field of aviation precision manufacturing and processing technology, and in particular, it relates to a CNC milling method for deep through grooves of annular hollow thin-walled parts, including horizontally clamping the parts on a CNC machine tool workbench; selecting a U drill with a radius equal to the corner R of the deep through groove and installing it on the CNC machine, and using the U drill to process all the corners R in place; using an indexable milling cutter to rough mill the part groove, and reserving the side wall support margin and the groove bottom support margin; using an end mill I to perform layered processing on the part groove to mill the side wall support margin of the part groove; and an end mill II to mill the groove bottom support margin from the outside of the groove bottom of the part groove until the deep through groove is formed. This technical solution uses a layered processing method to ensure sufficient margin support during the processing of the side wall of the deep through groove, effectively overcomes the influence of stress changes and cutting forces in the part, improves the surface quality of the part, and plays an important role in reducing the subsequent benchwork and grinding workload.

The present invention relates to a measuring device for detecting residual stress of transparent polymer materials and a method for measuring residual stress. The measuring device is composed of a measuring platform, a light source, a first polarizer, a first quarter wave plate, a ball screw device, a laser, a reflector device, a second quarter wave plate, a second polarizer, a CCD camera and a transparent polymer material model. The measuring device of the present invention is provided with a plurality of slideways on the measuring platform, and a plurality of optical components involved in the photoelastic method and the astigmatism method are assembled with the slideways in sequence by installing a magnetic base. During the measurement process, the corresponding optical components can be removed or the corresponding positions of the optical components in the slideways can be adjusted according to different measuring methods, thereby meeting the requirements of different measuring methods.

The invention discloses foot testing equipment based on a lifting matrix, and belongs to the field of measurement. Comprising a base, an electric push rod, a camera, a laser positioner and a control host. The base is used for accommodating a single foot of a patient; an electric push rod matrix is arranged in the base; a displacement sensor is arranged in each electric push rod to measure the lifting stroke of the electric push rod; a force sensor is arranged below each electric push rod, and foot bottom pressure borne by each electric push rod is measured; cameras are respectively mounted on the left and right sides of the base to capture foot images of a patient in real time; a laser positioner is arranged behind the base, and a green line laser beam which is vertical and horizontal to the ground is emitted to the achilles tendon of the foot of the patient; the control host controls the lifting height of each electric push rod and obtains pressure feedback data borne by each push rod in real time. By controlling the plurality of electric push rods arranged in a matrix mode, the foot shape and the multi-point plantar pressure data are synchronously obtained in real time, and the consistency of the foot shape and the plantar pressure is guaranteed.

The application provides a rotary mechanism axial sealing device and method and a powder flattening device. The rotary mechanism axial sealing device is used for sealing the axial direction of a rotary shaft and comprises a first sealing unit, a second sealing unit and a third sealing unit. The first sealing unit comprises a rotary sealing ring with a slope and a gland. The rotary sealing ring is sleeved on the rotary shaft, and the slope is tightly combined with the end surface of the gland under the axial pressure of the rotary shaft. The second sealing unit comprises a rotary pressure shaft seal, a spring pressing mechanism and a sealing shell. The sealing shell is sleeved on the rotary shaft, the rotary pressure shaft seal is arranged in the sealing shell, the inner diameter of the rotary pressure shaft seal is in interference fit with the rotary shaft, and the outer diameter of the rotary pressure shaft seal is in interference fit with the sealing shell. The spring pressing mechanism applies a continuous axial pressure to the rotary pressure shaft seal, so that the inner diameter of the rotary pressure shaft seal is kept in close contact with the rotary shaft. The third sealing unit comprises a radial lip-shaped sealing ring and a sealing shell. The radial lip-shaped sealing ring is arranged in the sealing shell, the inner diameter of the radial lip-shaped sealing ring is in interference fit with the rotary shaft, and the outer diameter of the radial lip-shaped sealing ring is in interference fit with the sealing shell.

This invention provides a silicon anode sheet and its preparation method. The silicon anode sheet includes: an active material layer containing silicon material, a conductive agent, and a fibrous binder; and a current collector disposed on the upper and lower surfaces of the active material layer, wherein the current collector is made of carbon felt material. According to the silicon anode sheet of this invention, on the one hand, the use of a fibrous binder in the active material layer can form a cross-linked bonding network, thereby effectively improving the flexibility of the electrode sheet and overcoming the deformation and stress problems caused by the volume expansion of the active material; on the other hand, the use of carbon felt material to make the current collector on the silicon anode sheet allows its rigidity to suppress electrode expansion, improve battery life, and its chemical properties to prevent electrolyte corrosion of the current collector, thereby effectively improving the battery's cycle performance.

The present application belongs to the technical field of long-distance natural gas pipeline engineering, and discloses a mobile pipeline gas recovery equipment. The equipment comprises a mobile platform and a natural gas compressor set. The natural gas compressor set is installed on the mobile platform and comprises a natural gas engine and a compression mechanism. The compression mechanism can access the residual natural gas in the working pipeline and supply a part of the residual natural gas to the natural gas engine as fuel after increasing to a preset pressure. The natural gas engine drives the compression mechanism to continuously operate to inject the pressurized natural gas into the downstream pipeline through a second interface. The equipment can be flexibly moved in a wide range to complete the recovery of residual natural gas in the working pipeline, reduce greenhouse gas emissions, and use the residual natural gas as energy, which is beneficial to meet the operation requirements of uncertain recovery locations and field operations. The compression mechanism overcomes the defect that the pressure of the residual natural gas decreases with discharge, reduces the venting volume, and improves the recovery efficiency of the pipeline gas.

The invention relates to a metal heat treatment process which comprises the following steps: 1) heating a steel sample blank to 900-1000 DEG C, and preserving heat for 2-4 hours to realize austenitization; 2) putting into a quenching system which takes a water-based quenching liquid solution with the mass concentration of 10-20% as a quenching medium for quenching treatment; 3) cooling to room temperature, cleaning the quenched part with clear water, tempering at 590-610 DEG C, and keeping the temperature for 2-4 hours; (4) the steel sample blank is taken out and air-cooled to the room temperature; wherein the water-based quenching liquid solution is prepared from a water-based quenching liquid composition and comprises the following components: polyether A, polyether B, a bactericide, an antirust agent, a defoaming agent and water. According to the heat treatment process, the water-based quenching liquid serves as a quenching medium, the quenching medium combines the characteristics of water and oil, the hardenability of the steel can be improved, quenching cracking deformation is avoided, and the quality of a workpiece product is improved.

The invention discloses an inert gas pressure stabilizer and a method for stabilizing loop pressure, and belongs to the technical field of nuclear reactor engineering. The invention aims to solve the problems that an existing inert gas pressure stabilization scheme lacks a special experiment device, and it is difficult to truly simulate the gas-liquid interaction process and obtain key thermal parameters. The pressure stabilizer comprises a pressure container with an upper inert gas area and a lower liquid area, an air inlet and outlet connecting pipe, an air inlet and outlet pipeline, a safety valve and a multi-height liquid level, temperature and inert gas content monitoring interface are arranged, and pressure buffering and stabilizing are achieved by pre-filling inert gas and combining drainage adjustment. According to the method, pressure fluctuation is absorbed through compressibility of inert gas, and the liquid level, temperature stratification, pressure, flow and the dissolved amount of the inert gas are monitored in real time. The device is suitable for the fields of nuclear power device loop pressure stability characteristic test and verification and the like.