169 results about "Leak rate" patented technology

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 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 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 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.

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 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 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.

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 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.

The invention discloses a method for evaluating the sealing performance of a fuel cell rubber sealing ring at a low temperature, and relates to the technical field of fuel cell sealing. Measuring a compression force-strain curve at 23 + / -2 DEG C; gradually reducing the temperature to a target temperature point and reading the compression force; establishing a hyper-elastic model based on the stress-strain curve; inputting material properties to perform low-temperature sealing force simulation and calibrating a thermal expansion coefficient; calculating the leakage rate through a temperature-compression ratio-leakage rate quantitative correlation model; and determining a minimum compression ratio design boundary according to the leakage rate threshold value. According to the application, sealing performance evaluation is upgraded from experience qualitative judgment to data-driven quantitative design, the sealing reliability and research and development efficiency of the fuel cell stack in extreme low-temperature environments such as-40 DEG C are remarkably improved, and a scientific basis is provided for commercial application of fuel cells in alpine regions.

A method of controlling a hydrogen fuel cell includes, with a controller of the fuel cell: measuring an anode leakage rate of the fuel cell; modeling an effective electrolyte membrane orifice size using the measured anode leakage rate; calculating an effective runtime anode leak rate during operation of the fuel cell using the effective electrolyte membrane orifice size; using the active runtime anode leak rate as a low side metric when calculating emission and dilution requirements; and starting adjustment of a control strategy of the fuel cell based on the effective anode leakage rate during operation and the shutdown leakage rate so as to prolong the service life of the fuel cell.

The application discloses a kind of land storage tank main shielding layer integral leak rate determination system and method, for determining the integral leak rate of land LNG film type storage tank main shielding layer corrugated board, the main shielding layer integral leak rate determination system includes vacuum system, gas injection system, gas state monitoring system and safety system.The determination method of the application includes the following steps: setting land storage tank main shielding layer integral leak rate determination system;In the tank inner space of the land storage tank, under the condition of positive pressure, test gas is injected into the tank inner space, and the concentration change value of test gas in the main shielding space is continuously recorded;The pressure of the tank inner space is reduced to atmospheric pressure, and the concentration change value of test gas in the main shielding space is recorded again;Calculate the integral leak rate value of main shielding layer.The determination system and method can effectively determine the integral leak rate of main shielding layer in a safe, economical and reliable manner within the design pressure range of land LNG film type storage tank.

The application discloses a nitrogen-hydrogen leak detection leakage discrimination algorithm based on time-frequency scale and image recognition, and comprises the following steps: S1, performing zero-phase low-pass filtering on a signal; S2, performing wavelet transform on the signal; S3, drawing a time-frequency scale coefficient graph; S4, using a peak feature recognition algorithm to determine whether there is leakage; S5, obtaining a leakage feature peak time domain coordinate to obtain a leak point position; and S6, obtaining an integral of a time-frequency scale coefficient in an interval above a certain frequency near the leak point to evaluate a leakage amount. In the application, continuous information in two spaces of a time domain and a frequency domain is used for leak point recognition and leakage determination, zero-phase low-pass filtering can be used to avoid position deviation caused by filtering phase delay, a peak feature recognition algorithm can be used to eliminate position deviation related to a leak rate, and leak point positioning precision is improved and a misjudgment rate is reduced.

The utility model discloses a nuclear power plant breather valve sealing performance test device comprising a pressurizing cover used for being connected with a valve body of a nuclear power plant breather valve and used for covering an upper cavity of the valve body, and a fixing assembly used for connecting and fixing the valve body and the pressurizing cover, and the pressurizing cover is provided with a connector used for being connected with pressurizing equipment; the connecting pipe is connected with the air inlet of the valve body, and the bubble counter is connected with the connecting pipe. By applying the device, the pressure difference can be established to simulate the opening state of the breather valve of the nuclear power plant in a manner of reversely applying positive pressure from the outlet of the valve cavity of the breather valve of the nuclear power plant. Long-term operation of machines and equipment is not needed, noise cannot be brought during verification work, and on-site valve state judgment cannot be affected. Positive pressure is reversely applied to the air outlet, leaked gas can be directly collected at the air inlet, the air bubble counter is used for directly, accurately and quantitatively detecting the sealing performance of the breather valve of the nuclear power plant, and the problem that the leakage rate cannot be visually collected and calculated in the negative pressure pumping test is solved.

The utility model discloses a system for measuring gas leakage and material barrier characteristics in a transparent closed container, which comprises a test box, a first adjusting assembly, a gas distribution assembly, a second adjusting assembly and a tunable diode laser absorption spectroscopy (TDLAS) measuring assembly, the sealing cavity is used for containing the closed container, the first adjusting assembly is communicated with the sealing cavity and used for adjusting the temperature, humidity and pressure in the sealing cavity, the gas distribution assembly is communicated with the closed container, and the second adjusting assembly is arranged between the gas distribution assembly and the closed container and suitable for being communicated with the closed container. The TDLAS measurement assembly is arranged on the test box and communicated with the sealing cavity, and the TDLAS measurement assembly is used for testing the target gas concentration of the closed container so as to detect the leakage rate in the closed container. The system for measuring the gas leakage and material barrier characteristics in the transparent closed container has the advantages of simplicity in test, accurate test result and the like.

A CCI test method for testing physical container closure integrity of a container (2), the CCI test method comprising the steps of: (120) obtaining a container having a hollow interior, an outlet, an open end, and a stopper arranged to close the hollow interior; tightly connecting (121) a first orifice, which is one of the outlet of the container and the open end of the container, to a test gas detector; connecting (122) a second orifice, which is the other of the outlet of the container and the open end of the container, to a test gas supply; arranging (123) the test gas detector to apply a detector pressure at the first orifice; arranging (124) the test gas supply to provide a test gas to the second orifice at a first test gas pressure; measuring (125) a test gas at the first orifice by means of the test gas detector while providing the test gas at the first test gas pressure; determining (126) a first leak rate based on the test gas measured at the first test gas pressure; and determining (127, 128, 129) a second leakage rate at a second pressure. A first pressure difference, which is a difference between the first test gas pressure and the detector pressure, is different from a second pressure difference, which is a difference between the second pressure and the detector pressure.

This invention proposes a method for predicting the leakage rate of rubber seals under complex spatial environmental effects. This method, for the first time, suggests that the total leakage rate of rubber seals consists of two leakage modes: leakage from the rubber sealing material itself and leakage at the microscopic interface. It analyzes the changes in the proportion of these two leakage modes and the leakage rate over time under single-factor and multi-factor spatial environmental effects, establishes the correlation between the leakage rate of rubber seals and time, and constructs a mathematical model for predicting the leakage rate of the rubber sealing material itself and the interface leakage rate under multi-factor spatial environmental effects. This invention can predict the leakage rate of the rubber sealing material itself and the interface leakage rate under multi-factor spatial environmental effects, and improves the calculation accuracy of the leakage rate of rubber seals under the influence of spatial environmental effects.

This application discloses an electrostatic chuck leak rate detection system, comprising: multiple channels connecting a gas source to the vacuum chamber of the electrostatic chuck under test, transmitting gas supplied from the gas source to the vacuum chamber; multiple universal pressure controller modules disposed outside the vacuum chamber and connected to the multiple channels one by one, each universal pressure controller module including a universal pressure controller, a pressure sensor, a flow sensor, and an electric regulating valve; a main control unit module communicating with the multiple universal pressure controller modules, used to: input a configured preset voltage and preset back pressure into a preset three-dimensional dynamic correlation model of voltage-back pressure-leak rate, so as to output the corresponding leak rate prediction value; when it is determined that there is a leak in the electrostatic chuck under test based on the leak rate prediction value and the leak rate detection value detected by the gas flow rate collected through each channel, the corresponding electric regulating valve is controlled by each universal pressure controller to adjust the gas flow rate transmitted to the vacuum chamber to form a preset back pressure.

This invention discloses a space hatch system and its rapid leak rate detection method, belonging to the field of space hatch reliability and safety design technology. The hatch system includes a sealed hatch, a pressure point switch, and a rapid leak detector. An inner and outer sealing ring are fitted onto the end face of the sealed hatch body. When the hatch is closed, the two sealing rings contact and press against the sealing surface of the hatch frame, forming a sealed cavity between the two sealing rings and the sealing surface of the hatch frame. The pressure point switch is located on the hatch frame and detects whether the hatch opening and closing action is complete. The rapid leak detector inflates the sealed cavity and performs a leak rate test to obtain the sealing condition of the sealing rings. Through the application of this invention, the completion of hatch action can be reliably detected, and the hatch's sealing performance can be quickly determined, providing a quantitative basis for whether the hatch can be reliably closed.

This invention discloses a helium leak detection system and method for supercapacitors. The system includes a sealed leak detection chamber, a vacuum pumping unit, a helium supply and recovery unit, and a helium mass spectrometer leak detector. The hollow sealed leak detection chamber is used to hold the capacitor to be tested. The sealed leak detection chamber is connected to the vacuum pumping unit, the helium supply and recovery unit, and the helium mass spectrometer leak detector. The vacuum pumping unit is used to perform a vacuum pumping operation inside the sealed leak detection chamber. The helium supply and recovery unit is used to fill the sealed leak detection chamber with a mixture of helium and nitrogen gas, and to recover and store the helium in the mixture. The helium mass spectrometer leak detector is used to detect the change in helium concentration in the sealed leak detection chamber in real time and convert the detected helium concentration signal into leak rate data. This invention is scientifically designed, has high detection accuracy, and can accurately detect the sealing performance of capacitors, determine whether there is a leakage problem, improve detection efficiency, and reduce detection costs.

The invention provides a hydraulic heavy-load sealing leakage rate measuring device and method, and belongs to the technical field of sealing element testing. The device aims at solving the problem that leakage rate measurement is not accurate under the heavy load and high pressure composite working condition. The device comprises a test tool for forming a sealing cavity, a hydraulic system for applying a normal load, a liquid supply system for providing a high-pressure medium, and a measurement module comprising a weighing device. The method comprises the steps of installing a sealing ring, applying a load and supplying a high-pressure medium, then collecting and weighing the mass of the leaked medium by using a weighing device, recording the test duration, and finally calculating the leakage rate according to the mass and the duration. The method can truly simulate harsh working conditions, adopts a mass method for direct measurement, is accurate and reliable in result, and gives consideration to both cost and automation degree.