14 results about "Ideal gas" patented technology

The application discloses an air dynamic test platform vacuum equipment leakage fault diagnosis method and system, aiming at solving the problems that the existing method is difficult to adapt to the complex time-varying characteristics of mixed gas, data is sparse, and lack of interpretability. The method first collects time series pressure data through a conventional pressure sensor, uses the ideal gas state equation as a physical mechanism model, deduces a leakage rate calculation equation, and extracts key characteristics of instantaneous leakage rate and cumulative leakage rate; then a BP neural network is constructed as a data-driven model, taking the leakage rate as input, and outputting normal and abnormal judgments after training with historical data. The application innovatively integrates physical mechanism and machine learning, without the need for special detection equipment, ensuring the interpretability of the diagnosis results, improving the diagnosis accuracy and reliability under small sample and variable working conditions, and realizing high-precision, low-cost air tightness online monitoring and early warning.

The application provides a dynamic measurement method and system based on parallel differential pressure analysis, and relates to the technical field of gas-liquid mass transfer measurement. The method adopts a measurement unit and a control unit in parallel, a first closed container of the measurement unit containing liquid and gas, and the initial volume of the gas phase in a second closed container of the control unit being the same as the volume of the gas in the first closed container. After the pressure of the two containers is synchronously and suddenly increased to the initial pressure P0 by synchronous pressure excitation, the system is closed, and the pressure decay curves P1(t) and P2(t) in the two containers are synchronously collected. After differential processing, the influence of system leakage is eliminated, and the net pressure decay curve ΔP(t) is obtained. Based on the ideal gas state equation, the change amount of the dissolved gas mass with time is inversed, and the dissolution kinetics data are obtained. The application can dynamically and accurately measure the gas dissolution process, effectively eliminates the leakage interference, and provides key dissolution kinetics data for gas-liquid mass transfer engineering.

The application discloses a tunnel pressure fluctuation simulation method and device, equipment and a storage medium, and relates to the technical field of pressure simulation. The method comprises the following steps: obtaining a to-be-simulated pressure curve according to train outside pressure data of a train during train driving in a tunnel; determining flow rate time sequence data corresponding to the to-be-simulated pressure curve according to a pressure-flow rate relationship; the pressure-flow rate relationship is determined according to an ideal gas state equation and a mass-flow rate relationship; and controlling the gas flow rate of a numerical simulation model according to the flow rate time sequence data to simulate a tunnel pressure wave and obtain a simulated pressure curve. As can be seen from the above, the train driving in the tunnel is no longer simulated, but the pressure wave generated by the train extruding air in the tunnel is directly simulated; and the flow rate time sequence data is generated according to the pressure-flow rate relationship, so that the gas flow rate of the numerical simulation model is controlled according to the flow rate time sequence data to simulate the tunnel pressure wave, obtain the simulated pressure curve, and realize efficient pressure fluctuation reproduction.

This invention belongs to the field of nuclear reactor target safety design, specifically relating to a method and system for calculating the internal pressure of a target based on the amount of tellurium compound. The method first determines the required core data; based on the mass and density of the tellurium compound, the effective volume of iodine vapor inside the target is calculated, where the effective volume is the internal volume of the target minus the volume occupied by the tellurium compound; based on the mass of the tellurium compound, the tellurium element mass fraction, and the number of iodine molecules generated per unit mass of tellurium element, the total amount of iodine vapor is calculated; based on the ideal gas law, the internal pressure of the target is calculated using the total amount of vapor, the gas constant, the operating temperature, and the effective volume. This invention establishes a dynamic correlation between the amount of tellurium compound and the effective volume, clarifies the mass conversion relationship between Te and the tellurium compound, and constructs a high-precision I-131 target internal pressure calculation model, possessing significant engineering application value and theoretical innovation significance.

The application discloses a portable hydrogen fuel cell safety hydrogen supply and pressure stabilizing system and belongs to the technical field of hydrogen fuel cells. The system comprises a pulse injection valve and an injection pressure stabilizing assembly arranged along a flow direction. The assembly comprises a central injection pipe and a peripheral pressure stabilizing cavity sleeved outside the central injection pipe, an annular cavity with fixed volume parameters is formed between the central injection pipe and the peripheral pressure stabilizing cavity, and the mixed pressure expansion section pipe wall is provided with a flow guide hole penetrating into the cavity. The system further comprises a sensor module and a control unit. The control unit performs boundary constraint calculation based on the ideal gas state equation and the pressure limit of the electric pile, determines the safety threshold of the maximum opening duration of the pulse valve in a single time, and combines the load working condition to distinguish the low-load pulse and the high-load straight-through working condition, thereby realizing selective boundary constraint of the pulse injection valve driving signal. Through the cooperation of the physical structure and the electronic constraint depth, the impact risk of excessive hydrogen injection is eliminated, the continuous hydrogen supply and the stable pressure in the full power range are ensured, and the system operation safety and reliability are improved.

The application relates to the technical field of air tightness detection, and specifically discloses a tool air tightness detection data intelligent analysis method and system, which comprises the following steps: collecting pressure, environmental temperature signals and time parameters in real time; performing dynamic temperature compensation on the pressure based on an ideal gas state equation and by introducing a temperature change rate to obtain compensated pressure values and compensation residuals; performing online verification on operation standardization based on the compensated pressure; calculating an equivalent pressure leakage rate, pressure curve nonlinearity and compensation residual fluctuation coefficient based on pressure maintaining stage data to obtain a comprehensive aging index for evaluating the state of a sealing element; calculating a leakage trend slope, a residual trend slope and a temperature change rate response consistency from historical data to obtain a comprehensive trend index for judging performance degradation; and outputting results and early warnings. Through multi-parameter fusion analysis, the application can realize high-precision temperature compensation, online quantitative evaluation of sealing element aging and early warning of performance degradation, reduces the misjudgment and omission rates, and supports predictive maintenance.

The application discloses a method for optimizing a reverse cam mechanism profile and evaluating dynamic stability, comprising the following steps: constructing a simple harmonic motion cam profile equation containing parameter correction based on the motion law of a crank slider mechanism; establishing a four-degree-of-freedom dynamic equation containing time-varying contact stiffness of the reverse cam mechanism based on Newton's second law; calculating the gas pressure and gas stiffness in the cylinder by using the ideal gas polytropic process theory; calculating the curvature radius of each point of the cam profile equation, and constructing a stiffness matrix of the reverse cam mechanism in combination with the time-varying contact stiffness and the gas stiffness; solving the four-order time-varying natural frequency of the reverse cam mechanism corresponding to the stiffness matrix, and analyzing the unstable domain under parameter excitation by using the Floquet theory to determine the parameter value range of the simple harmonic motion cam profile equation containing the parameter correction.

The present application provides a turbine dual-fuel switching control method with adaptive gas pressure threshold, belonging to the technical field of turbine generator set, and applied to turbine units that have completed dual-fuel modification. The method retains the original manual oil switching function, constructs a near-point turbine inlet side and a far-point gas buffer tank double-pressure acquisition unit, adaptively calculates the oil switching pressure threshold based on the ideal gas state equation and the dynamic working condition correction model, configures a double-path trigger mechanism, and when any path meets the trigger condition, the turbine control system automatically executes the gas-to-oil switching program. The present application solves the problems of traditional manual oil switching, such as dependence on manual operation, response lag, fuel waste, etc., and the oil switching time is ≤1 min, the power fluctuation is ≤300 kW, which significantly improves the stability, economy and risk resistance of the unit operation, and is especially suitable for scenes with high requirements for power supply reliability, such as offshore platforms.

This invention discloses a multi-field coupled numerical simulation method for underground coal gasification, relating to the field of energy development technology. The invention first constructs a multi-field coupled physicochemical control model, a porosity dynamic evolution model, a permeability dynamic evolution model, and a non-ideal gas thermodynamic model to realistically recreate the underground coal gasification process. Based on these models, a fully autonomous and controllable numerical simulation framework is built from the ground up. The finite volume method is used to spatially discretize the governing equations, and a fully implicit nonlinear solver is developed to perform fully coupled iterative solutions for all physical fields within the same time step. Using the structural parameters and internal medium parameters of the actual coal seam, the spatiotemporal evolution laws of the temperature field, pressure field, component concentration field, and porosity / permeability parameters during the underground coal gasification process are obtained using the constructed underground coal gasification numerical solver. By combining dynamic property evolution with accurate thermodynamic simulation, a precise simulation of the underground coal gasification process is achieved.

The present application belongs to the field of nerve traction equipment, and provides a nerve traction and online measurement device and a working method thereof. The nerve traction and online measurement device comprises an open container, a piston and a measurement module. The piston is arranged in the open container and is in contact with the inner wall of the open container to form a sealed space. The piston is connected to one end of a movable rod, the movable rod extends out of the open container by a preset length and is connected to the distal end of a broken nerve. A fixed rod is installed at a position opposite to the open container where the movable rod extends out, and the fixed rod is connected to the proximal end of the broken nerve. There is a pressure difference between the inside and outside of the device, which drives the movable rod to linearly pull the nerve. The measurement module is used to obtain the pressure and temperature data of the known gas in the sealed space, and then based on the ideal gas state equation, the volume of the sealed gas is calculated, and then the displacement of the piston and the pulling force are obtained, that is, the nerve deformation and the pulling force are measured simultaneously.

The utility model relates to experimental apparatus technical field, and disclose a device for determining aluminium piece and HCL solution produce ideal gas constant, including first support seat, the reaction test tube is clamped with rubber clamp on first support seat top, through pulling the baffle, cooperation draw spring, can make the baffle drive the clamping plate and the separation of sliding slot, subsequently baffle and limiting plate can move up and down on the outside of sliding slot, in this way can adjust the position of indicating strip according to the liquid level in gas measuring tube, make indicating strip accurate point to the liquid level inside gas measuring tube, subsequently through connecting rod, it is convenient to connect two sliding blocks, make screw rod rotate, can slide up and down on the outer wall of mounting rod through the sliding block of thread cylinder, in this way can conveniently adjust the liquid level in horizontal pipe, make the liquid level in horizontal pipe and indicating strip alignment, in this way always keep horizontal pipe and gas measuring tube water surface level, in order to not make the gas of reaction to make gas pressure in gas measuring tube too big and take place gas leakage.

The application discloses a kind of vacuum layer air tightness real-time detection method and detection device of vacuum thermal insulation ware.Method includes: sealing the opening of measured ware, after stable waiting time, initial pressure value and temperature value are collected, external heating 0.2 to 5 minutes, real-time monitoring pressure change value and temperature change value during heating process.Judgment rule is: if temperature change value exceeds temperature threshold value, regardless of pressure change value size, immediately judged as unqualified, which can effectively detect the special failure mode of internal and external double leak;If temperature does not exceed threshold value but pressure exceeds threshold value, it is judged as suspicious;If both are not exceeded, it is judged as qualified.Pressure and temperature threshold value are matched according to ideal gas state equation, and can be calibrated in advance according to volume.Detection device includes sealing part, heating part, pressure detection element, temperature detection element, control unit and result output unit.The application realizes real-time determination, result is intuitive, can effectively cover all failure modes, suitable for batch rapid detection of vacuum thermal insulation ware.

This invention discloses a pressure vessel sealing detection system and method, relating to the field of pressure vessel sealing performance testing technology. It aims to solve the problem that existing technologies cannot simultaneously meet the requirements of high precision, high efficiency, anti-interference, low cost, and adaptability to all scenarios. The system includes a gas source unit, a gas path control unit, a dual differential pressure detection unit, a standard reference tank, an ultrasonic positioning unit, a main control unit, a safety protection unit, and a data management unit. These units are connected via gas and electrical paths to form a closed-loop detection system. The gas source unit includes a high-pressure gas source and a tracer gas source. By setting up a dual differential pressure detection unit, a standard reference tank, and a three-channel temperature sensor array, combined with a temperature compensation algorithm based on the ideal gas law, this invention achieves high-precision, anti-interference detection, overcoming the shortcomings of existing technologies such as large temperature interference and low detection accuracy. It can stably detect 1×10⁻⁶ temperature sensors. ‑ 6 Pa・m 3 / s-level micro-leakage significantly improves detection consistency.

This invention discloses a cam divider testing system, belonging to the field of cam divider sealing and monitoring technology. The system includes a base unit, a floating docking unit, a drive load unit, and a data acquisition and sensing unit. A drive motor drives the cam divider to operate according to an indexing-stationary motion curve, while a magnetic powder brake applies a simulated load to reproduce actual dynamic stress and temperature changes. The system integrates a pressure sensor, a weighing sensor, an acoustic emission sensor, and an encoder to monitor cavity pressure, grease quality, oil seal friction acoustic emission signals, and motion phase in real time. Temperature compensation is applied to the pressure using the ideal gas law, and the leakage rate is obtained by linear fitting of the stationary section weighing signal. Furthermore, acoustic emission characteristics are fused to identify early leakage events. This invention can simulate dynamic working conditions, enabling multi-dimensional, full-process quantitative analysis of sealing performance, significantly improving the accuracy and reliability of the test.