93 results about "Pressure load" patented technology

The invention relates to a door and window safety performance detection device for constructional engineering, and belongs to the technical field of constructional engineering detection. The uniformly distributed load force application assembly can apply uniform or gradient change pressure to the whole surface of the door and window to simulate wind pressure; the concentrated load force application assembly can perform fixed-point impact on specific parts of doors and windows and simulate hard object impact or violent forcible entry; the wind pressure loading assembly applies uniform and gradient-adjustable wind pressure loads to the surfaces of doors and windows, simulates stress states under different wind levels and detects the air tightness of the doors and windows, and the rainfall simulation assembly simulates rainfall environments with different strengths to detect the water tightness of the doors and windows; the deformation of doors and windows, the stress of key parts of the doors and windows, the water leakage condition and the air leakage condition can be monitored, and the comprehensiveness and the real-time performance of detection data are ensured. The system can achieve the detection of multiple safety performance dimensions of the doors and windows of the constructional engineering, effectively improves the detection efficiency and precision, reduces the manual operation intervention, and provides a comprehensive and reliable data support for the safety performance evaluation of the doors and windows.

The invention belongs to the technical field of aircraft structure tests, and particularly relates to an axial compression test fixture. The device comprises a supporting clamp, a rolling contact piece and a loading clamp, one end of the loading clamp is connected with an axial compression load applying device, the other end of the loading clamp is provided with a semi-cylindrical mounting groove, the supporting clamp is of a semi-cylindrical structure and is mounted in the semi-cylindrical mounting groove of the loading clamp, and an arc-shaped space is formed between the supporting clamp and the bottom of the semi-cylindrical mounting groove; the device is installed in an arc-shaped space between a supporting clamp and a loading clamp, the center of a semi-cylinder plane of the supporting clamp is connected with one end of a test piece, and the other end of the test piece is connected with the other supporting clamp and the other loading clamp which are of the same structure. And the center of the end surface of the test piece, the center of the middle section of the support clamp and the center of the middle section of the loading clamp coincide. An ideal simple support boundary is provided through rolling contact design, load centering is ensured, additional bending moment is avoided, the structure is compact, and the test precision and practicability are remarkably improved.

The invention discloses a pressure loss analysis method for a total heat exchanger core, and belongs to the technical field of total heat exchangers. The pressure loss analysis method comprises the steps that under the preset air volume, flow field solving is conducted on a flow channel of a total heat exchanger core, and pressure loads on the two sides of a diaphragm are obtained; according to the mapping of the pressure loads on the two sides of the diaphragm to the boundary of the diaphragm structure, the deformation of the diaphragm is obtained; according to the mapping of the deformation amount of the diaphragm to the boundary of the flow channel, the flow field of the flow channel of the total heat exchanger core is solved again, and the pressure loads on the two sides of the diaphragm are updated; and repeating the steps until calculation is converged, and outputting a flow field result to obtain the pressure loss of the total heat exchanger core. According to the invention, the pressure loss in the core body can be accurately calculated.

This application belongs to the technical field of aircraft wing rib strut cross-sectional parameter design, specifically relating to a method for designing aircraft wing rib strut cross-sectional parameters, including: determining the thickness δ of the bottom edge of the wing rib strut based on the thickness δ of the wing rib web. u ; Calculate the minimum moment of inertia I of the ribbed strut. umin ; Calculate the minimum area A of the ribbed strut cross section. umin ; Calculate the top pressure load R of the ribbed strut. 0 ; Calculate the thermal stress load R of the rib support. t ; Calculate the working stress σ of the ribbed strut section; Calculate the critical instability stress σ of the ribbed strut section cr ; Calculate the safety margin MS of the ribbed strut; The minimum moment of inertia I of the ribbed strut umin Minimum area A of the cross-section of the ribbed strut umin Under the constraint that the safety margin MS of the ribbed strut is greater than 0, find the area A of the ribbed strut cross section. u The minimum width b of the bottom edge of the wing-rib support 2 The height b of the web of the wing-rib support 1 The thickness t of the web of the wing-rib support 1 .

The present invention relates to a device having a steam generator (10), wherein the steam generator (10) has a first side (11) and a second side (12), wherein the second side (12) is designed to generate steam, wherein the device has a first bypass line (20), wherein the first bypass line (20) is arranged to bypass the first side (11) of the steam generator (10), wherein the first bypass line (20) has a first bypass valve (22), wherein the second side (12) is connected to a steam discharge line (30), wherein the steam discharge line (30) has a steam shut-off valve (32), wherein the second side (12) has a pressure measuring device (40), wherein the device has a control device (50), wherein the control device (50) is connected to the pressure measuring device (40) and the first bypass valve (22), wherein the control device is designed to control the first bypass valve (22) depending on the pressure recorded by the pressure measuring device (40).

To provide a rotary compressor that ensures sufficient compressor capacity and resistance to high-pressure loads on the medium to be compressed. [Solution] In a rotary compressor (100) housed in a sealed container (C) and having a compression section (30) for compressing a medium to be compressed and a drive section (40) for driving the compression section (34), the sealed container (C) comprises a hollow first shell (10) having an opening that is open on at least one axial side, and a second shell (22) that closes the opening, wherein the diameter of the first shell (10) on one axial side that houses at least a part of the compression section (30) is larger than the diameter of the other axial side that houses at least a part of the drive section (40), and the axial side portion of the first shell (22) that houses at least a part of the compression section (30) is covered by the second shell (22) from the radially outside, and the first shell (10) and the second shell (22) are in contact with each other with a radial overlap to form a cover section (50).

The invention provides a packaging structure of a differential pressure sensitive element. The packaging structure comprises a packaging base, a pressure conduit and a column array structure, the central axes of the column array structure, the first pipeline of the pressure conduit and the differential pressure sensitive element coincide and are parallel to the central axis of the packaging base; the column array structure comprises a plurality of column units surrounding the periphery of the first pipeline; and the differential pressure sensitive element is fixed on the first pipeline opening of the pressure conduit and the second array surface of the column array structure. By arranging the column array structure, including setting the length, position height and form of the column unit, setting the size relationship among the column array structure, the differential pressure sensitive element and the pressure conduit, isolating the stress of a static pressure load on the differential pressure sensitive element, reducing the influence of high static pressure on the differential pressure sensitive element, and inhibiting the static pressure deviation; and the measurement accuracy and repeatability of the differential pressure sensitive element are improved.

The invention provides an intelligent simulation method and device for wheel impact and a server, and relates to the technical field of intelligent simulation, and the method comprises the steps: determining a three-dimensional geometric model of a target wheel according to material attributes and orientation information of the wheel; determining a loading position and an impact direction of the punch hammer based on the impact interaction point, updating the punch hammer model to obtain a target punch hammer model, and determining a rack constraint condition and a buffer boundary condition according to the fixed surface; based on a preset gas state equation, establishing a bidirectional coupling relationship between tire deformation and air pressure change in the simulated air cavity so as to determine a pressure load of gas in the tire; and executing wheel impact process simulation processing in the target wheel three-dimensional geometric model through an explicit dynamics solver by utilizing the target impact hammer model, the rack constraint condition, the buffer boundary condition and the gas pressure load so as to generate simulation results of the wheel impact process and the structure rebound process after the removal of the simulation impact hammer. According to the invention, the simulation accuracy can be obviously improved.

The utility model provides a damping device and elevator equipment, the damping device comprises a first shell, a second shell and an elastic energy absorption part, the elastic energy absorption part is stacked between the inner wall of the first shell and the inner wall of the second shell, the damping device further comprises at least one limiting assembly, the limiting assembly comprises a limiting mounting piece and at least one fixed connecting piece, and the limiting mounting piece is fixedly connected with the fixed connecting piece. At least one strip-shaped hole is formed in the limiting installation part, the second shell is provided with a connecting structure, and the fixed connecting part penetrates through the strip-shaped hole and is fixedly connected with the connecting structure on the second shell so that the limiting installation part can be fixed to the second shell. The limiting installation piece and the first shell are arranged at intervals in the stacking direction of the first shell, the second shell and the elastic energy absorption part, and a preset included angle is formed between the extending direction of the strip-shaped hole and the stacking direction. According to the elevator damping device, the first shell and the limiting installation piece make contact with each other when the pressure load borne by the damping device is too large, the rollover risk is avoided, and the operation safety of elevator equipment is guaranteed.

The present invention relates to a device having a steam generator (10), wherein the steam generator (10) has a first side (11) and a second side (12), wherein the second side (12) is designed to generate steam, wherein the device has a first bypass line (20), wherein the first bypass line (20) is arranged to bypass the first side (11) of the steam generator (10), wherein the first bypass line (20) has a first bypass valve (22), wherein the second side (12) is connected to a steam discharge line (30), wherein the steam discharge line (30) has a steam shut-off valve (32), wherein the second side (12) has a pressure measuring device (40), wherein the device has a control device (50), wherein the control device (50) is connected to the pressure measuring device (40) and the first bypass valve (22), wherein the control device is designed to control the first bypass valve (22) depending on the pressure recorded by the pressure measuring device (40).

The utility model provides a reciprocating driving mechanism of an abrasion testing machine and a testing device of the reciprocating driving mechanism, two vertical inner sides of a reciprocating frame of the reciprocating driving mechanism are provided with sliding chutes, a cross-shaped motion sliding block is arranged in the sliding chutes of the reciprocating frame, and an eccentric wheel is arranged in a mounting hole in the center of the cross-shaped motion sliding block; the eccentric shaft is connected with the eccentric wheel shaft hole; reciprocating shafts are arranged on the opposite outer sides of the reciprocating frame. The testing device comprises a rack, a heating base, a linear reciprocating assembly, a testing groove, a pressure loading assembly, a testing clamp and a driving motor. The linear reciprocating assembly is simple in structure, the amplitude of the reciprocating linear motion is guaranteed through the double-eccentric structure design of the eccentric shaft and the eccentric wheel, and the test reciprocating stroke is adjustable. The reciprocating friction-wear testing machine is used for testing under a material extreme pressure condition and an oil product extreme pressure condition. The equipment is attractive in overall structural design, convenient to operate, high in automation degree, good in equipment operation stability and high in test precision, the actual working condition state of a material is simulated, and the test accuracy is improved.

The invention discloses a method for analyzing interaction behaviors of wire-wound fuel rods after irradiation deformation. The method comprises the following steps: defining a material constitutive structure based on an ABAQUS explicit material subprogram to obtain rod bundle irradiation deformation characteristics; using SOLIDWORKS to reconstruct the geometric structure of the deformed rod cluster; the influence of contact behaviors on grid division quality is eliminated by adjusting the rod bundle distance and the rod-winding wire distance, grid division is carried out by adopting an unstructured grid and boundary layer optimization strategy, and a transient turbulence pulsating pressure field is captured by a wall surface self-adaptive local vortex-viscous model based on large vortex simulation; explicitly defining a rod bundle and a winding wire contact pair; the fluid time-varying pressure load is mapped to the solid surface to execute transient dynamic calculation, and vibration displacement response and contact force time history data are synchronously output; the vibration dominant frequency is identified through fast Fourier transform, and the resonance risk is positioned in combination with the inherent frequency of the structure. According to the invention, co-simulation of irradiation deformation of the wire-wound fuel rod bundle and wire-wound rod bundle solid coupling response can be realized.

The invention provides a control method of a booster pump, which comprises the following steps: enabling a power output end of an electromagnet to be in contact with a diaphragm, enabling the electromagnet and the diaphragm to synchronously reciprocate, and establishing a physical relation between electromagnetic field change and diaphragm mechanical displacement; when the diaphragm performs return reset motion under the action of fluid reference pressure, current waveform data output by the magnet exciting coil are collected in real time through a sampling circuit; the control unit analyzes the collected current waveform data, and calculates the reference pressure of the water inlet end and the deformation resistance of the diaphragm under the current working condition based on a pressure load mapping model; the control unit calculates the required auxiliary driving torque according to the difference value between the reference pressure of the water inlet end and the target output pressure so as to realize dynamic self-adaptive matching of the driving power and the water inlet pressure; and in the time window when the diaphragm executes the pressurization stroke, controlled driving current is input into the magnet exciting coil, and electromagnetic thrust consistent with the movement direction of the diaphragm is generated.

The utility model discloses a test device for upper and lower layer loading of a double-layer steel truss girder, which comprises a four-column type loading hydraulic machine, and further comprises a top plate distribution beam, a jack, a bottom plate distribution beam and a rigid spring from top to bottom, the top plate distribution beam is horizontally arranged, the middle of the top plate distribution beam is fixedly connected with the lower end of a piston rod of the loading hydraulic machine, and the top plate distribution beam is pressed on a double-layer steel truss girder top plate in use and used for applying pressure load to the double-layer steel truss girder top plate. The bottom plate distribution beam is horizontally arranged under the top plate distribution beam. The rigid springs are connected between the left end and the right end of the top plate distribution beam and the left end and the right end of the bottom plate distribution beam. During use, the bottom plate distribution beam is arranged between the upper layer and the lower layer of the double-layer steel truss in a penetrating mode and pressed downwards, and the bottom plate distribution beam is used for applying pressure loads to the bottom plate of the double-layer steel truss. The multiple jacks are arranged between the top plate distribution beam and the bottom plate distribution beam.

This application relates to the field of multi-condition bellows dynamic characteristic testing technology, and in particular to a multi-condition bellows dynamic characteristic testing device. The device excites and tests bellows under combined working conditions using a vibrator or hammer. It measures the vibration acceleration parameters of triaxial accelerometers at both ends of the bellows, and after calculation, accurately obtains the vibration isolation performance parameters of the bellows under combined working conditions, achieving higher testing accuracy. By selecting the vibrator or hammer according to the bellows' mass and diameter, the influence of the vibrator's added mass and stiffness on measurement accuracy can be avoided. Furthermore, it can simulate the environment, more closely resembling real service conditions. By applying different working conditions and combined working conditions such as high temperature, pressure load, axial or lateral displacement, it realistically simulates the actual working conditions of the bellows, accurately obtaining the vibration isolation performance parameters of the bellows.

The invention provides an expansion joint which comprises a corrugated sleeve, the corrugated sleeve comprises an inner-layer corrugated pipe and an outer-layer corrugated pipe arranged on the periphery of the inner-layer corrugated pipe in a sleeving mode, the inner-layer corrugated pipe is used for forming a medium main channel, one end of the corrugated sleeve is provided with a flange assembly, and the flange assembly comprises a first end ring flange and a second end ring flange; the first end ring flange is connected with the inner-layer corrugated pipe, the second end ring flange is connected with the outer-layer corrugated pipe, a gap exists between the first end ring flange and the second end ring flange, and the first end ring flange and the second end ring flange can move relatively to enable a closed first cavity to be formed between the inner-layer corrugated pipe and the outer-layer corrugated pipe. And then the first cavity is communicated with the medium main channel. The flange assembly is controlled to move through the clamp, the inner-layer corrugated pipe bears pressure independently at low pressure, and the damping effect is excellent; in high pressure, the inner-layer corrugated pipe relieves pressure, the outer-layer corrugated pipe bears pressure, and the low-pressure vibration reduction and high-pressure bearing functions are achieved at the same time.

The invention discloses a horizontal swing arm driving type energetic material friction sensitivity testing device, which comprises an equipment box body, and further comprises an outer bracket fixedly arranged at the top of the equipment box body, and an electric cylinder fixedly arranged on the outer bracket; a pressure loading assembly; the clamping and heating assembly is mounted on the equipment box body through a sliding assembly; the servo motor is mounted in the equipment box body; and a swing arm driving assembly. By means of the horizontal swing arm driving type friction sensitivity testing device for the energetic material, the problem that in the prior art, the strict requirements for precision and reliability of novel energetic material research and development and standardized testing cannot be met is solved.

This invention relates to the field of pressure reducing valve testing technology and discloses a pressure testing system for pressure reducing valves. The system's environmental parameter monitoring module collects real-time data on temperature, humidity, and vibration intensity of the environment in which the pressure reducing valve is located and transmits this data to the test execution module. Based on the received environmental data, the test execution module initiates a pressure loading process, applying a dynamically changing pressure load sequence through a hydraulic control device, while simultaneously recording the deformation response data of the pressure reducing valve. After receiving the deformation response data, the result analysis module performs multi-dimensional failure mode identification calculations, generating a test report containing leakage risk assessment parameters and structural fatigue coefficients. This report is fed back to the test execution module for real-time adjustment of the pressure load sequence application strategy. Through the coordinated operation of its modules, this system achieves dynamic monitoring and evaluation of the pressure performance of the pressure reducing valve, improving the accuracy and relevance of the test.

The invention relates to a stator lining (3) for an eccentric screw pump stator (1), comprising: a rotor receiving space (8) formed axially through the stator lining (3) from a suction end region to a pressure end region of the stator lining (3) with respect to a longitudinal central axis (L) of the stator lining (3); and at least one pressure chamber recess (17) which is spaced radially outward from the rotor receiving space (8) and which is open radially outward and / or at least one pressure chamber (24, 25) which is spaced radially outward from the rotor receiving space (8) and which is formed entirely within the stator liner (3); wherein the pressure chamber recess (17) and / or the pressure chamber (24, 25) are / is in communication connection with a pressure end region of the stator liner (3). In order to create a stator (1) that minimizes the return of the delivery medium to the suction side of the eccentric screw pump even under relatively high delivery pressure loads, the stator liner (3) is made of a material selected from the group consisting of at least one metal, at least one metal alloy, and at least one metal alloy. And at least one plastic or plastic composite having a hardness of at least 65 Shore D hardness.

The application belongs to the technical field of wind power, and specifically discloses a wind turbine installation platform, which comprises a table top and a plurality of vertical beams, and further comprises a plurality of deformation units, and the upper end of each vertical beam is provided with a deformation unit. The deformation unit comprises a hydraulic cylinder and a hydraulic piston, the hydraulic cylinder is fixedly connected with the table top, an elastic component is arranged between the upper end of the hydraulic piston and the hydraulic cylinder, and the lower end of the hydraulic piston penetrates through the hydraulic cylinder and is fixedly connected with the vertical beam. The upper half area of the hydraulic piston of each deformation unit is communicated with the lower half area of the hydraulic piston of the adjacent deformation unit through a pipeline. The hydraulic cylinder and the pipeline are filled with liquid. When a certain area of the table top is deformed, the adjacent area will also be deformed in the same direction to a certain extent, so that gradient deformation is formed, the damage and instability of the structure caused by excessive local deformation can be avoided. Moreover, the pressure load can be dispersed, the excessive local stress can be relieved, and the risk of settlement of individual vertical beams caused by stress concentration can be reduced.

This invention discloses a production process for improving the strength of 12Cr1MoVG steel. By optimizing the C–Cr–Mo–V–Nb–N microalloying system and combining controlled rolling in the non-recrystallization zone, online rapid quenching, and secondary hardening tempering, the process achieves synergistic optimization of microstructure refinement and strengthening mechanisms. The process steps include: billet heating, controlled rolling, online cooling at 18–25℃ / s after final rolling, tempering at 650–700℃, and stabilization treatment at 250–350℃. After treatment by this invention, the steel microstructure exhibits a composite structure of fine bainite and tempered martensite, with uniform precipitation of nano-sized VC, Mo2C, and NbC, significantly improving yield strength, tensile strength, low-temperature impact toughness, and high-temperature creep rupture performance. Compared with traditional normalizing + tempering and ordinary controlled rolling processes, this invention can increase yield strength by 55–85 MPa and creep rupture performance by 15–20%, making it suitable for high-temperature and high-pressure load-bearing components.

The invention discloses a mechanical seal end face friction test device and method capable of quickly adapting to different shaft diameter and pressure conditions. The device comprises a base assembly, a main shaft system, a driving system, a movable ring clamping mechanism, a static ring adjusting mechanism and a pressure loading module. The moving ring clamping mechanism is of a chuck type structure, and a sliding body is driven to move in the radial direction by rotating a chuck connecting shaft so as to rapidly clamp moving rings with different shaft diameters. The static ring adjusting mechanism drives the multiple reduction blocks to synchronously and radially move by rotating the rolling lead disc, and precise clamping and centering of static rings with different shaft diameters are achieved. And the pressure loading module adopts a replaceable pressurizing spring and a slidable adjusting sliding block, so that the axial pressure applied to the static ring can be flexibly adjusted. According to the invention, rapid clamping and efficient testing of mechanical sealing rings of different specifications are realized, and the testing efficiency and the data reliability are obviously improved.

A calibration device of a six-dimensional force sensor comprises a T-shaped groove plate, a bottom plate, a fixing block, a pressing block and a first loading plate, and is characterized in that the bottom plate comprises a mounting part and a fixing part, the fixing part can be fixed on the T-shaped groove plate, the mounting part is arranged above the T-shaped groove plate, and the fixing part is arranged above the T-shaped groove plate. The distance between the mounting part and the T-shaped groove plate is larger than the sum of the thickness of the first loading plate, the thickness of the sensor and the thickness of the fixing block, the fixing block is arranged on the side, facing the T-shaped groove plate, of the mounting part, the sensor is fixed to the fixing block, the pressing block is fixed to the bottom plate, the pressing block is matched with the mounting part to clamp and fix the fixing block, and the first loading plate is fixed to the sensor. A first loading plate is arranged on one side of the mounting part, a stand column is arranged on the first loading plate, a second loading plate is arranged on the other side of the mounting part, the second loading plate is not in contact with the mounting part, the second loading plate is fixedly connected with the first loading plate through the stand column, and a loading column is arranged on the second loading plate. The calibration device is simple in overall structure, and can convert the downward pressing load of the force testing machine into the pulling force acting on the six-dimensional force sensor, so that the calibration in the Fz positive direction is realized.

This invention discloses a high-temperature damping blade vibration simulation testing device and its operation method. The high-temperature damping blade vibration simulation testing device includes a test bench base; a support frame disposed on the test bench base; a blade fixing frame for fixing and installing the damping blade to be tested; a shroud normal pressure loading device for fixing and applying normal pressure to the shroud area of ​​the damping blade to be tested; a vibration force loading device for applying vibration force to the damping blade to be tested; a heating device for heating the blade area; and a measurement and control device for controlling and adjusting the normal pressure loading, vibration force loading, and heating temperature to realize high-temperature damping blade vibration simulation testing. This invention can simulate the blade vibration response when a damping blade is subjected to certain normal pressure, vibration force, and thermal load, and can provide important data and theoretical guidance for the study of the vibration characteristics of damping blades in high-temperature turbine machinery.

A pressure sensing device includes a deflectable membrane structure to provide a deflection dependent output signal based on a pressure load, and a mechanical abutment structure for adjusting a spring constant of the deflectable membrane structure depending on the deflection of the deflectable membrane structure, wherein the mechanical abutment structure provides an abutting condition of the deflectable membrane structure when the deflection of the deflectable membrane structure exceeds a deflection threshold, wherein the abutting condition results in a change from a first spring constant to an increased, second spring constant of the deflectable membrane structure.

The application provides a regular wave slamming construction platform stress analysis method and system and a computer readable storage medium thereof. According to platform basic dimensions and wave basic parameters, a stress condition of the regular wave slamming construction platform is directly, quickly and efficiently calculated based on a large amount of test measurement data. The defects of the direct calculation complexity, measurement cost and the like of the slamming pressure load prediction in the existing theoretical calculation and model test are solved.

The utility model relates to the technical field of enamel glaze feeding machine, provide a kind of enamel glaze feeding machine pressure divider, including feed pipe, hopper and spiral feed roller, the rear end of the top of feed pipe is fixed with hopper, the rear end of feed pipe is equipped with motor, the rear end of the rotating shaft of motor is inserted into the rear end inside feed pipe, the utility model when material is too much to cause the excessive pressure of feed pipe inner wall, pressure divider block and pressure divider air bag cooperate, pressure divider air bag generates reverse elastic force, by the effect of pressure divider block on material and feed pipe, effectively offset part of the pressure of material to feed pipe inner wall, reduce the pressure load that feed pipe overall bears, ensure that feed pipe stable operation.Pressure divider air bag has elastic deformation characteristics, in the face of material pressure change, can timely absorb and buffer the impact force generated by pressure mutation.In the momentary increase of material pressure, rapidly deform to release force, protect feed pipe and spiral feed roller, reduce the risk of damage due to impact of equipment, prolong the service life of equipment.

The utility model discloses an improved spiral spring, and relates to the technical field of spiral springs. The high-temperature-resistant steel wire rope comprises a mandrel, a plurality of outer winding layers are wound on the outer wall of the mandrel, reinforcing ribs are fixedly connected to the interiors of the outer winding layers at intervals, a high-temperature-resistant layer is arranged on the outer wall of the outer winding layer on the outermost layer, an anti-rust layer is arranged on the outer wall of the high-temperature-resistant layer, and a reinforcing layer is arranged on the outer wall of the anti-rust layer. The spiral spring is provided with the external winding layers and the reinforcing ribs, when the spiral spring is subjected to external pressure, the spiral spring firstly transmits the pressure to the internal core shaft through the multiple strands of external winding layers, then the stress is dispersed through the reinforcing ribs embedded in the external winding layers at intervals, and finally effective absorption and buffering of the load are achieved; the maximum bearing capacity and durability of the spring are greatly improved, the service life is prolonged, the permanent deformation rate caused by long-term use is reduced, the safety coefficient is improved, and the production cost is reduced.

The invention provides a pressurizing device for highway engineering new material test detection, and relates to the technical field of engineering material pressure testing. The four corners of the fixed test bench are respectively provided with a connecting hole. And a stabilizing groove is formed in the middle of the fixed test bed. After a hydraulic cylinder on a fixing frame is started, the telescopic end of the hydraulic cylinder is driven by a control system to slowly stretch out downwards to drive a connecting plate to synchronously move downwards in the vertical direction, and after a test pressure block at the bottom of the connecting plate is completely contacted with the surface of a test piece, the hydraulic cylinder continuously and uniformly applies pressure according to a preset loading rate; the pressure load is flatly transmitted to the test piece through the test pressure block, so that eccentric loading and stress concentration are effectively avoided, and the problem that pressure data of a new material need to be collected and transmitted in real time due to the fact that the new material needs to be subjected to a pressurization test is solved. Otherwise, the mechanical response states of deformation, damage and the like of the material in different pressure stages cannot be accurately mastered.

The invention discloses a method, medium and equipment for analyzing the stability of a tunnel bearing arch based on loosening pressure, and relates to the technical field of engineering data analys.The method comprises the steps that the height of an arch crown loosening area is delimited based on a construction numerical simulation result; the reinforced loose surrounding rock is simplified into a hinge-free bearing arch structure which is elastically and fixedly connected with the side wall; determining a load system comprising vertical pressure, horizontal pressure and support reaction force, wherein the lateral pressure coefficient of the horizontal pressure is determined through iterative optimization; a bearing arch-elastic foundation side wall collaborative mechanical model is established, and internal force is calculated; based on the Hook-Brown criterion, considering the equivalent confining pressure provided by the anchor rods, and calculating the comprehensive strength of the bearing arch composite rock mass; and calculating a compression-resistant and tensile safety coefficient to realize quantitative evaluation of the stability. By optimizing the horizontal loosening pressure load and accurately simulating the synergistic effect of the bearing arch and the surrounding rock, a scientific and economical safety evaluation means is provided for the supporting design of the super-large-span tunnel.