266 results about "Leak rate" patented technology

The invention discloses a vacuum sealing leakage rate prediction method and device, equipment and a medium. The method comprises the following steps: constructing a three-dimensional microstructure model of a flange sealing surface according to a processing mode of the flange sealing surface; based on the three-dimensional microstructure model, establishing leakage micro-channels between the sealed contact interfaces in different contact states, analyzing channel characteristics, and determining flow characteristics of leakage media in the leakage micro-channels in different contact states; constructing a first leakage rate prediction model represented by the microscopic characteristic parameters according to the working environment parameters and the physical attributes and flow characteristics of the leakage medium; and constructing a mapping relation between the macroscopic design parameters and the microscopic characteristic parameters through characteristic multi-scale coupling, and substituting the mapping relation into the first leakage rate prediction model to obtain a second leakage rate prediction model driven by the macroscopic design parameters so as to predict the vacuum sealing leakage rate. The method has the advantages of high precision, strong adaptability and good engineering practicability.

The invention discloses a pneumatic joint sealing performance intelligent test method and system based on dynamic pressure spectrum and multi-parameter fusion, and belongs to the technical field of pneumatic element sealing detection. According to the method, a dynamic pressure spectrum simulating an actual working condition is applied to a tested joint, pressure, temperature and ultrasonic signals are synchronously acquired, environmental thermodynamic interference is eliminated by adopting a temperature real-time compensation algorithm, and pressure change purely caused by leakage is separated by deducting system baseline data; and finally, fusing double characteristic parameters of the pressure leakage rate and the ultrasonic energy, and comprehensively evaluating the sealing performance through an intelligent judgment model. The system comprises a gas circuit tool module, a multi-sensing module and a control processing module, can effectively solve the problems that a traditional static pressure maintaining method is greatly influenced by temperature, transient leakage cannot be detected and the like, has the advantages of being high in detection precision, high in anti-interference capability, capable of simulating real working conditions and the like, and remarkably improves the test reliability and efficiency.

The invention relates to the technical field of petrochemical equipment sealing, in particular to a flange sealing performance evaluation method based on bolt axial stress, which comprises the following steps: establishing a nonlinear stress relationship between a gasket and bolt axial force; establishing a relationship between the axial stress of the bolt and the sealing contact stress of the contact surface of the gasket under different working pressures; constructing a three-dimensional model of a real sealing surface; establishing a three-dimensional model of the sealing surface contact process; obtaining the change of a leakage gap between the contact surfaces under different contact stresses, and establishing a relation model of the leakage gap of the contact interface and the sealing contact stress; establishing a quantitative evaluation model among the sealing contact stress, the leakage clearance and the leakage rate; obtaining the contact stress under the actual working condition, and calculating whether the corresponding leakage rate meets the tightness judgment standard or not so as to judge the sealing state of the flange. The invention aims to solve the technical problem that the metal sealing performance of in-service flange connection cannot be quantitatively and online evaluated in the prior art.

The invention discloses a vacuum cavity pressure maintaining test and leak rate rapid estimation method and system, and the method comprises the steps: achieving the test preparation of multiple sections through a public metering manifold and a multi-way isolation valve, and building a section volume database; the pressure and temperature data are synchronously collected in a fixed sampling period by exhausting air to preset pressure and isolating a pump end; obtaining an equivalent pressure change rate through temperature normalization and deflation baseline deduction in combination with filtering and regression algorithms, and performing conversion to obtain a standardized leak rate; step-by-step detection is carried out on each functional section of the cavity through a segmented bipartite isolation strategy and volume correction, and rapid positioning of a suspicious leakage section is realized; through double-threshold determination of an early warning threshold and an unqualified threshold, a detection report is automatically generated and written into a historical database, and a detection-determination-maintenance closed loop is formed. The method can improve the precision of leak rate detection, and is suitable for vacuum coating equipment, semiconductor process equipment and industrial vacuum treatment devices.

A nuclear main pump double-cone sealing leakage detection method based on a bolt load and a sealing contact model relates to the technical field of double-cone sealing leakage detection.The method comprises the steps that firstly, the bolt load is substituted into a mapping model of the bolt load and gasket sealing surface contact pressure, and the sealing surface contact pressure is obtained; dividing calculation units for the sealing contact surface, and completing the construction of a gasket sealing rough contact surface model of a single calculation unit; a finite element simulation method is used for obtaining a sealing contact surface entity after compression deformation; the deformed sealing contact surface entity is subjected to micro fluid leakage calculation in Fluent fluid simulation software, and the leakage rate of a single calculation unit is obtained; finally, the leakage rate of the whole double-cone sealing structure is obtained according to division of the calculation units. By acquiring the king bolt load and the sealing contact model, tiny leakage detection of the double-cone sealing structure is achieved, and the method has the advantages of being high in accuracy, simple in test, high in environmental adaptability and the like.

The invention provides a sleeve testing device and a strength checking and correcting method, and relates to the technical field of offshore high temperature and high pressure, and the device comprises a temperature control system which is used for providing a steady-state high-temperature simulation environment and a transient high-temperature simulation environment for a sleeve sample; the loading system is used for applying axial, radial and internal loads to the casing sample; the monitoring system is used for monitoring a surface temperature field, inner wall strain and leakage of the casing sample; and the data processing and control unit is respectively connected with the temperature control system, the loading system and the monitoring system. The method adopts the device and comprises the following steps: selecting a casing sample, fixing a sensor and completing initial calibration; heating the whole casing pipe and keeping the temperature constant, and applying instantaneous thermal shock to a specific area; synchronously applying axial, radial and internal loads; cooperatively monitoring the temperature field, the strain and the leakage rate to form an associated database; and correcting the safety coefficient. The invention solves the problems of single test temperature and insufficient load coupling of the traditional casing, and is suitable for casing performance evaluation.

The invention belongs to the technical field of valve airtightness detection, and provides a vacuum valve airtightness detection method and device, and the method comprises the following steps: collecting event records of positive pressure-negative pressure bidirectional detection of a vacuum valve for many times from a historical detection database, and carrying out the clustering analysis of events with similar detection conditions, forming a plurality of event groups with similar detection conditions; the method comprises the following steps: acquiring detection conditions of real-time bidirectional detection events, acquiring a similar event group of the matched detection conditions as a target analysis group through a matching algorithm, screening out events with consistent detection sequences from the target analysis group, and respectively constructing a first detection sequence event set and a second detection sequence event set; and respectively performing deviation analysis on the detection leakage rate and the actual leakage rate in the first detection sequence event set and the second detection sequence event set to obtain a first leakage rate deviation sequence and a second leakage rate deviation sequence.

The invention provides a method and system for detecting inner leakage of a positive pressure helium detection valve, and relates to the technical field of valve sealing performance detection.The method comprises the steps that test gas with rated working pressure is applied to a to-be-detected valve, the change of the internal pressure of the valve is monitored in real time under the rated working pressure, and positive pressure inner leakage pre-detection is conducted; if the pressure is kept stable, a judgment result of passing the pre-detection is obtained, and if the pressure fluctuation exceeds a set threshold value, the test is terminated and an alarm signal is sent out; and based on the judgment result of the pre-detection, in the process of continuously applying the test gas, controlling the temperature condition of the to-be-tested valve, repeatedly executing the positive pressure inner leakage test at different temperatures, and recording the basic leakage rate at each temperature point to obtain an initial dynamic sealing performance curve. According to the invention, accurate correction and multi-dimensional data fusion of valve leakage rate detection data can be realized, and the accuracy of inner leakage detection of the valve under a temperature alternating working condition is improved.

The invention relates to the technical field of radiation protection equipment, and provides a multi-scale self-adaptive fixing system for a lead plate, in the aspect of lead plate fixing, through a three-degree-of-freedom structure and a precise force control system of a shape memory alloy driving clamp, the clamping angle and force can be adjusted in a self-adaptive manner, the plastic deformation of the lead plate is effectively avoided, and the service life of the lead plate is prolonged. The problem that a traditional clamp is poor in fixing precision is solved. And due to the innovative structure of the modular quick connection assembly, the assembly and the disassembly are convenient, the seam leakage rate is greatly reduced, and the radiation protection performance is improved. In terms of environmental adaptation, the temperature and humidity cooperative control system can accurately adjust the temperature of the lead plate, and the self-repairing nano ceramic anti-corrosion coating can effectively isolate corrosion ions and automatically repair the coating. The intelligent monitoring and early warning system utilizes a multi-dimensional sensor, edge calculation and digital twinning technology to monitor the state of equipment in real time, quickly diagnose faults and perform graded early warning, so that the safe and stable operation of the system is guaranteed, and the reliability and the intelligent level of the equipment are greatly improved.

The invention relates to the technical field of valve air tightness detection, and discloses an automatic pressurization air tightness detection method and system for a high-pressure valve, and the method comprises the steps: determining the effective volume and background leakage rate of a test loop, completing the pre-debugging of a valve seat and a seal, supplying air to the test loop, building dual criteria, and when an isothermal steady-state condition is satisfied, carrying out the automatic pressurization air tightness detection of the high-pressure valve. The method comprises the following steps: connecting a reference sealing cavity in parallel in a test loop, counteracting environment drift and slow change of gas supply, and calculating a leakage rate and deducting a background leakage rate according to the change of effective volume and pressure of the test loop along with time and the change of gas temperature along with time in combination with a real gas compression factor. And when the difference value between the gas temperature and the valve body temperature exceeds a temperature difference judgment threshold value, the leakage rate is corrected. And comparing the leakage rate with a preset leakage rate threshold value to obtain a judgment result. According to the invention, the voltage stabilization time is shortened, the thermal transient state and environmental drift are inhibited, and the small leakage detection capability, the result consistency and the judgment accuracy of the high-pressure valve are improved.

The invention relates to a predictive maintenance-oriented mechanical seal leakage rate on-line monitoring method and a predictive maintenance-oriented mechanical seal leakage rate on-line monitoring system. According to the method, historical data of a multi-dimensional sensor is collected and preprocessed, and causal inference is carried out based on a time sequence relation so as to accurately identify a direct reason variable and a hybrid variable which influence the leakage rate and quantify a causal effect of the direct reason variable and the hybrid variable; then, a special causal feature set is constructed by utilizing the causal knowledge to train an attention neural network model deeply fused with causal effect intensity, finally, the model is utilized to perform online monitoring and prediction on real-time data, and dynamic updating of the model is triggered according to a performance evaluation result of a prediction sequence. Therefore, more accurate, more robust and causal interpretable prediction of the mechanical seal leakage rate under the complex dynamic working condition is realized, and the decision accuracy of predictive maintenance and the system adaptive capacity are effectively improved.

The invention discloses a leak detector leak rate prediction method based on function fitting and correlation analysis, and relates to the technical field of helium mass spectrometer leak detector detection.The leak detector leak rate prediction method comprises the steps that a leak rate and time associated sequence corresponding to a leak hole is collected, function fitting processing is conducted on the leak rate and time associated sequence, and a leak rate attenuation feature model is obtained; then a real-time data fitting model corresponding to the leak hole is collected, correlation analysis is carried out on the real-time data fitting model and the corresponding leak rate attenuation feature model, and a correlation analysis result is determined; and finally, on the basis of the correlation analysis result, the leak rate of the leak hole is predicted, a leak rate prediction result is determined, the judgment time can be greatly shortened in any leak rate range, and the leak detection efficiency is greatly improved.

A gas permeation and leakage rate testing device and method for a non-metallic hydrogen transmission pipe. The device includes: a testing member formed with a testing cavity adapted to placing a to-be-tested pipe, and the testing cavity being formed with a sealed testing chamber after the to-be-tested pipe is placed therein; a calibration chamber selectively communicated with the testing chamber; a first gas-filling assembly selectively communicated with the calibration chamber to be adapted to filling a gas into the calibration chamber to a first set pressure; a measuring unit configured to measure pressures and temperatures in the calibration chamber and the testing chamber, and to calculate a calculated volume of the testing chamber; and a permeation and leakage rate testing unit configured to obtain a pressure change value of the testing chamber in a preset time interval and calculate a gas permeation and leakage rate of the to-be-tested pipe.

The invention provides a nuclear power plant primary loop leakage rate calculation method and system, and the method comprises the steps: controlling a cooling medium to circularly flow in a test pipeline under a first preset pressure, and detecting whether the pressure boundary of a primary loop leaks or not; when the pressure boundary of the primary loop does not leak, controlling the circulating flow test duration of the cooling medium in the test pipeline under a second preset pressure, detecting whether recognizable leakage exists in the primary loop, and obtaining a recognizable leakage rate, a side leakage rate outside the pressure boundary of the primary loop and test data; calculating the overall leakage rate of the loop according to the test data and the test duration; and calculating the total leakage rate and the unidentifiable leakage of the loop according to the overall leakage rate, the identifiable leakage rate and the side leakage rate. According to the invention, when the auxiliary system of the unit under construction of the nuclear power plant is not completed, a set of test water tank can be connected between the discharge pipeline interface and the charge pipeline interface of the loop.

The invention discloses a CO2 conveying pipeline leakage prediction method and device, relates to the technical field of CO2 conveying pipeline safety risk assessment, and aims to solve the problem that a reliable CO2 conveying pipeline leakage prediction method is lacked in related technologies. The method comprises the steps that pipeline parameters, leakage parameters and environment parameters are obtained; inputting the pipeline parameters, the leakage parameters and the environment parameters into a prediction model to obtain prediction data; the prediction data comprises at least one of the following data: a pipeline state, a leakage rate at a future moment, a leakage rate at the future moment and CO2 concentration distribution; the prediction model is a physical information neural network model; and according to the prediction data and the concentration threshold, calculating to obtain a dangerous area.

The closure member is configured to avoid or reduce a leak rate on the relief valve. These configurations may include a primary seal and a secondary seal, the combination of which may significantly reduce flow exiting the device. The secondary seal may be embodied as a resilient member, such as a curved or pleated metal spring. The resilient member may be compressed and extended in response to the presence or absence of a load. The feature may maintain contact between the resilient member and the seat of the valve.

The present invention provides an apparatus and method for detecting and testing the leakage rate of connecting components and sealing materials in a hydrogen-added pipeline, which includes a sealing module and a detection unit, wherein the sealing module includes a hydrogen-added cylinder, a high-pressure pump, and a high-temperature box connected in series, a test component is installed in the high-temperature box, and one end of the high-temperature box is connected to the detection unit, which includes a drainage method detection unit and a differential pressure method detection unit, and the detection unit obtains leakage detection data and continuously optimizes the leakage rate data to improve the sealing performance of the connecting components and sealing materials in the pipeline.

The present invention discloses a method, device, medium, and equipment for calculating the leakage rate of an underground lined chamber in a compressed air energy storage power station, belonging to the technical field of compressed air energy storage power stations. The method comprises the following steps: obtaining the air mass m0 (kg) within the chamber at the beginning of a set time period Δt, the theoretical air mass m1 (kg) within the chamber at the end of the set time period Δt, and the actual air mass m2 (kg) within the chamber at the end of the set time period Δt; and calculating the leakage rate of the underground lined chamber in the compressed air energy storage power station within the set time period Δt based on the air mass m0 (kg) within the chamber at the beginning of the set time period Δt, the air mass m1 (kg) within the chamber at the end of the set time period Δt, and the air mass m2 (kg) within the chamber at the end of the set time period Δt. The device, medium, and equipment can be used to implement this method. They can monitor the leakage rate of the underground lined chamber in the compressed air energy storage power station in real time, ensuring the operational safety of the underground lined chamber in the compressed air energy storage power station.

The utility model relates to a kind of anti-falling fire-fighting lance joint, belong to fire-fighting equipment technical field;Including ratchet lock ring, bidirectional elastic pusher and unlocking slider, when the water hose connecting end is inserted into the lance connecting end, rotate ratchet lock ring to make the end of bidirectional elastic pusher be inserted into ratchet pawl ring tooth slot, form mechanical interlock;When unlocking, one-hand presses unlocking slider, its inside wedge push rod extrudes pusher root, forces pusher elastic deformation to separate tooth slot, ratchet lock ring can be freely rotated to realize separation at this time;When water pressure is greater than 0.5MPa, conical sealing ring expands radially and enhances sealing, leakage rate is less than 0.1L / min;Protective flange covers 80% exposed part of ratchet lock ring, and 15J impact resistance is impacted, suitable for fire-fighting water hose quick connection, solve the industry pain point of traditional joint operation slow, easy to fall off, high risk of accidental touch.

The invention provides a device and method for measuring the vacuum packaging leak rate of a micro electro mechanical resonant device, and the device comprises a resonant device which comprises a driving structure, a vibration mass block, and a vibration pickup structure; the closed-loop driving circuit is connected with the driving structure and the vibration pickup structure and used for adjusting driving voltage applied to the driving structure according to the displacement information and preset displacement target voltage; the test computer is connected with the air pressure sensor, the temperature sensor and the closed-loop drive circuit, the air pressure sensor is used for measuring the pressure value of the environment where the resonant device is located, and the temperature sensor is used for measuring the temperature value of the environment where the resonant device is located; and the test computer is used for calculating the leakage rate of the resonant device in any time period according to the driving voltage output by the closed-loop driving circuit and the environment temperature value. Through the device provided by the invention, the problems of complex structure, low measurement precision and high cost of the current leak rate measurement system are solved.

The invention belongs to the technical field of cementing technologies and adhesives, and discloses a low-stress cementing sealing structure of a spherical zinc sulfide window, which is used for realizing butt joint of an aluminum alloy outer cover (2) and the spherical zinc sulfide window (1), and cementing sealing of the lower part of the outer wall of the spherical zinc sulfide window (1) and the upper part of the inner wall of the aluminum alloy outer cover (2). After the sealing assembly is used for sealing the zinc sulfide window, the overall leakage rate of the window (the sealing assembly is placed in a metal sealing container, a standard leakage opening is formed in the container, and the leakage rate is tested at the leakage opening through a helium mass spectrometer) is reduced to 10 <-8 > Pam < 3 > / s from 10 <-7 > Pam < 3 > / s sealed through traditional silicon rubber, the order of magnitude is reduced, and the sealing qualification rate is increased to 98% or above from 80%; compared with traditional epoxy resin sealing, the risk that the window deforms and even cracks is greatly avoided.

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 invention discloses a molten salt check valve helium leak detection device and method, and belongs to the technical field of molten salt check valves. The problems that in the prior art, leakage rate detection is inaccurate, and the leakage position is difficult to find are solved. According to the technical scheme, a helium source is sequentially connected with a first pressure gauge and a spray gun, the left side of a fused salt check valve is connected with a helium mass spectrometer leak detector and an auxiliary vacuum pump, and the right side of the fused salt check valve is sequentially connected with a second pressure gauge, a second electric stop valve, a second quick cut-off valve and a second release valve; and a calibration leak hole is formed in the fused salt check valve. According to different use conditions, a proper detection method can be selected to determine the leakage amount of a leakage point, and if a vacuum leakage detection test exceeds the standard, the method is continued to find out the position of the leakage point, so that repair is facilitated; detection cost is low, and equipment is simple; detection results are visual, and leakage positions are easy to judge.

The present invention relates to the technical field of reducers, and discloses a reducer shaft seal structure with a compensation function, comprising a main body, an inner cavity formed therein, a rotating shaft inside the main body, and an auxiliary pressure controller, comprising: a limit frame, installed in the inner cavity; a pressure control ring, sleeved on the rotating shaft, slidably installed in the limit frame, the pressure control ring and the inner cavity forming a dynamic seal; wherein, when the internal pressure of the main body changes positively or negatively, the pressure control ring moves along the axial direction of the rotating shaft in response to the pressure change, and its motion trajectory is constrained by the limit frame. The present invention controls the internal pressure fluctuation within a certain degree through the axial displacement compensation mechanism of the pressure control ring. This design reduces the leakage rate of lubricating oil, especially in high dust environments where the reducer air vent is clogged or the design is unreasonable. In addition, it maintains a stable state for use in various environments, the axial movement resistance of the control ring is small, and the service life of the oil seals inside and outside the control ring is extended.

This invention proposes a double-layer sealing door device for an ultra-high vacuum evaporation coating machine, including a processing chamber. A sealing door is provided on the outer side of the processing chamber, and the two are connected by a hinge assembly. A sealing area is provided on the outer end face of the processing chamber, and at least one evacuation hole is opened in this area. An inner sealing ring and an outer sealing ring are arranged sequentially on the inner side of the sealing door. When closed, the inner and outer sealing rings simultaneously press against the sealing area to form an annular vacuum chamber. The evacuation hole is located inside the vacuum chamber and is used to independently evacuate the chamber to form a secondary seal. Through the coordinated design of the inner and outer double sealing rings and the vacuum chamber, a transition vacuum zone is constructed between the sealing door and the processing chamber, making the pressure difference between the inside and outside of the door approach zero, significantly reducing the stress deformation of the sealing rings and extending their service life. At the same time, the double vacuum barrier greatly reduces the leakage rate of the main chamber and improves the sealing reliability.

The utility model relates to the technical field of rotary kilns, in particular to a sealing device for a feeding cover and a discharging cover of a rotary kiln, which is characterized in that a first sealing body is provided with a sealing convex ring, a second sealing body is provided with a sealing groove and a spring seat, the spring seat is provided with a plurality of guide rods, the guide rods are sleeved with springs, the springs are limited between the spring seat and the second sealing body, and under the tension of the springs, the sealing convex ring can seal the feeding cover and the discharging cover of the rotary kiln. And the second sealing body is pushed to move towards the first sealing body, so that the sealing convex ring is attached into the sealing groove. When the cylinder body axially moves due to thermal expansion and cold contraction or the sealing convex ring and the sealing groove are worn due to long-term use, under the tension action of the spring, the second sealing body is pushed to move towards the first sealing body, the gap is automatically compensated, the sealing convex ring is tightly attached to the interior of the sealing groove, it is ensured that the sealing faces are attached all the time, and the leakage rate is reduced to 0.3% or below.

A real time tire pressure monitoring system includes a sensor measuring a pressure of a first tire and a sensor measuring a pressure of a second tire. The measured pressures are transmitted from the sensors to a processor, and a fusion module is executed on the processor. The fusion module includes a filter module that receives the first tire pressure, determines a leak rate of the first tire, and generates a filter module flag when the leak rate falls below a predetermined leak threshold. The fusion module also includes a comparative module that receives the first and second tire measured pressures, compares the measured pressures, and generates a comparative module flag when a deviation exceeds a predetermined deviation threshold. The fusion module generates a system notification when both the filter module flag and the comparative module flag indicate a pressure leak.

The present invention relates to a leak detection device for an ALD source sub-packaging cylinder. The device includes a transfer chamber connected to a vacuum pump via a cold trap, a weighing device disposed within the transfer chamber, and a sub-packaging cylinder placed on the weighing device. The sub-packaging cylinder stores an ALD source. The outer wall of the transfer chamber is coated with a heating element, and the transfer chamber is also connected to a pressure gauge. The present invention also discloses a leak detection method for an ALD source sub-packaging cylinder. The present invention can effectively detect the leakage rate of a cylinder containing an ALD source, is safe and convenient to operate, and significantly reduces the possibility of safety risks caused by leakage in the ALD source sub-packaging cylinder.

The utility model relates to an oil drain valve for an oil remover based on buoyancy adjustment, which belongs to the technical field of oil-water separation and comprises a mounting valve body, a valve core mounted in the mounting valve body, a sealing valve cover arranged at the upper end of the mounting valve body, a positioning mounting frame mounted in the sealing valve cover, and a guide rod chock plug clamped in the positioning mounting frame. The outer side of the guide rod chock plug is sleeved with a return spring, the lower end of the guide rod chock plug is provided with a spherical sealing body, the lower side of the spherical sealing body is provided with a main buoy, and high-precision recognition and self-adaptive control of an oil-water interface are achieved through the synergistic effect of the main buoy and a nonlinear spring and in combination with a conical surface-spherical surface composite sealing structure; the density of an inner cavity of the main buoy is adjustable to adapt to different oil products and working conditions; the nonlinear spring provides a gradient increasing reset force in a critical displacement interval, so that the sensitivity is improved; the device does not need external energy, the leakage rate is lower than 0.01 mL / min under the pressure of 10 bar, and the device is suitable for continuous and efficient separation of oil-containing wastewater.

The present application relates to the technical field of seepage mechanics, and particularly relates to a conical sealing surface leakage rate calculation method based on Darcy's law, comprising the following steps: a W-M function is used to simulate the random topography of the workpiece surface at a microscale, and a normalization method is used to generate surface point cloud data meeting roughness requirements; according to the surface point cloud data, a contact mechanics model is used to solve the change law between the contact state and the external load, and according to the Hertz contact theory, the contact between the rough surfaces is reconstructed as the contact between a rigid plane and a flexible rough surface; the surface is discretized into a three-dimensional grid model, the effective porosity is screened and calculated by using the connected domain discrimination method; a micro-leakage rate calculation method for the conical sealing surface in the flared pipe joint is obtained based on the effective porosity and the seepage mechanics theory algorithm; the leakage rate of the conical sealing interface is calculated, and the sealing performance of the interface is quantitatively evaluated. The present application improves the comprehensiveness and accuracy of the sealing performance evaluation.