226 results about "Leak testing" patented technology

A battery case leak testing device includes a housing having a testing port. A pump is in fluid communication with the testing port and is configured to generate a prescribed pressure at the testing port. A pressure sensor is in fluid communication with the testing port to measure fluid pressure at the testing port. A controller is in operative communication with the pump and the pressure sensor, and is configured to facilitate operation of the pump in a first mode and a second mode. In the first mode, the pump operates to generate a first prescribed pressure at the testing port. In the second mode, the pump operates to generate a second prescribed pressure at the testing port. The controller transitions the pump from the first mode to the second mode when the pressure sensor measures a prescribed pressure characteristic when the pump is operating in the first mode.

A rolling-element bearing includes first and second concentric ring assemblies mounted for relative rotation. The first ring assembly includes a first rolling ring and a first sealing ring supporting first and second seal elements each having a lip. The second ring assembly includes a second rolling ring and a second sealing ring contacted by the lips of the first and second seal elements. The first sealing ring includes a first sealing member radially spaced from the first seal element and a first leakage test channel having an inlet between the first sealing member and the first seal element and an outlet at an external surface of the first sealing ring, and / or the second sealing ring includes second and third sealing members and a second leakage test channel having an inlet between the second and third sealing members and an outlet at an external surface of the second sealing ring.

The invention relates to the technical field of servo valve testing, and particularly discloses an electro-hydraulic servo valve test bench and a test method thereof, and the test bench comprises a calibration basis obtaining module which constructs each correction basis; the static performance test module performs static performance synchronous test and signal compensation on the tested electro-hydraulic servo valve based on the channel delay compensation table to obtain a static performance index; the dynamic performance test module performs dynamic frequency sweeping test and distortion correction on the tested electro-hydraulic servo valve based on the channel delay compensation table and the frequency-amplitude compensation coefficient mapping table to obtain a dynamic performance index; the internal leakage performance test module is used for performing internal leakage test and leakage amount compensation on the tested electro-hydraulic servo valve based on a temperature-viscosity-internal leakage amount three-dimensional correction model of the hydraulic oil source to obtain an internal leakage performance index; the test result summarization module obtains a test result based on the indexes; the integrated precise test of the static and dynamic performance and the internal leakage performance of the servo valve is realized.

A method for manufacturing an electrical machine, characterized in that the method comprises the following steps: - Providing an engine component (10), wherein the engine component (10) has at least one sealing surface (20) for arrangement in an injection molding tool (2) which is designed to keep the engine component (10) partially free of potting compound (30) during overmolding with potting compound (30); - Arranging and sealing the motor component (10) over the at least one sealing surface (20) in a leak test device (1); - Performing a leak test; - Arranging and sealing the motor component (10) in an injection molding tool (2) over the at least one sealing surface (30) and overmolding with potting compound (30).

The invention relates to a filtering method (200) for a leak test cycle of a certain type of object to be tested, for constructing a database capable of determining at least one reference value relating to a leak test of said object type, in particular suitable for an early leak detection method; the invention relates to a method (200) for measuring a test cycle comprising the measurement of a physical quantity related to the degree of leakage in at least one part of an object to be tested or in a peripheral cavity of the object to be tested, said method (200) comprising at least the following steps: determining (E2) a deviation between the measured values of the physical quantity at the starting time and the ending time of the test cycle, referred to as a total deviation; the total deviation is compared (E3) with a total deviation reference value.

The utility model discloses a cavity for detecting the air tightness of an accommodated workpiece and equipment thereof, the cavity comprises a lower cavity and an upper cavity, the lower cavity comprises a lower cavity top, a lower cavity bottom, a flat plate assembly, a first rod, a second rod and a third rod; the flat plate assembly comprises a first plate and a second plate. The first rod penetrates through the first plate through hole, and the two ends of the first rod are movably connected with the top and the bottom of the lower cavity correspondingly. The second rod penetrates through the second plate opening and is movably connected with the flat plate assembly, a first tooth-shaped transmission part is formed on the surface of the first end of the second rod, and a limiting part is arranged at the second end of the second rod; a tooth-shaped transmission part is formed on the surface of the third rod, and the first end of the third rod is movably connected with the bottom of the lower cavity. According to the invention, by arranging the adjustable limiting part, detection of workpieces with different sizes is realized; and through combination of the sliding rails in the cavity and the rods, position arrangement of the workpiece in six directions is achieved, the workpiece can make full contact with helium, and the utilization rate of the helium is increased.

The traction motor (10) features: a fluid-tight stator chamber (38) with a motor stator (30), wherein the stator chamber (38) has a fluid inlet (36) and a fluid outlet (37), and a rotor chamber (28) with a motor rotor (20), wherein the rotor chamber (28) has an air inlet (26) and an air outlet (27). The examination order (100) indicates: a test gas source (102) with a detectable test gas (103) which is fluidically connected to the stator chamber fluid inlet (36) via a fluidic inflow control (105), a switchable outlet valve (110) connected to the stator chamber fluid outlet (37), a test gas detector (112) that can detect the test gas (103) and that is fluidically connected to the rotor chamber air outlet (27), and a vacuum gas pump (114) through which rotor chamber air is pumped or drawn from the rotor chamber (28) through the rotor chamber air outlet (27) to the test gas detector (112), and an electronic test control (120) which is connected via signal links to the test gas inflow control (105), the stator chamber outlet valve (110) and the test gas detector (112). The electronic test control (120) generates the following process steps: Introducing the test gas (103) from the test gas source (102) into the stator chamber (38) such that the stator chamber gas pressure (p38) is at a defined above-atmospheric test gas overpressure (ps), and Activating the gas pump (114) and the test gas detector (112), thereby quantitatively detecting leakage test gas flowing into the air-filled rotor chamber (28).

A leak testing apparatus is provided, for testing connections between tubes penetrating a plate material. A housing is disclosed having a central cylindrical longitudinal hollow. A piston arranged inside housing, where a distal end of the piston in use is inserted into the tube. A seal arranged circumferentially on the piston, such that in use the second seal may be brought into sealing engagement with the tube. A second end of the housing is closed by an endcap where at least one channel is provided longitudinally in the piston and a connection to the channel allowing connection to a source of pressurized medium is provided, connecting the pressurized medium to a space, in use limited by the first seal, the plate material, the tube and the second seal, and optionally part of the piston and part of the housing.

This utility model relates to the field of automotive valve body leakage testing technology, specifically a fixture for automotive valve body leakage testing, including a water tank. A detection mechanism is rotatably mounted on the water tank, and a long rod is fixed to the end of the detection mechanism. A sealing mechanism is fixed to the long rod, and the sealing mechanism includes a base plate and a rotating rod. The end of the long rod is bolted to the base plate, and a stop block is fixed to the base plate. A washer is engaged on the stop block. A rotating rod is rotatably mounted on the base plate, and a sliding rod is threaded onto the rotating rod. A locking rod is fixedly mounted on the sliding rod, and a stop rod abuts against the locking rod. Two support blocks are symmetrically fixed to the stop block, and the stop rod is rotatably connected to the support blocks. The top of the stop rod abuts against the washer. The linkage structure of the rotating rod, sliding rod, and stop rod allows the stop rod to apply uniform and adjustable pressure to the washer, ensuring that the washer fits tightly against the valve body end, avoiding the sealing failure caused by the washer easily lifting or shifting in traditional fixtures.

A vacuum relief valve for a railroad tank car and methods for using the same to test the vacuum relief valve for leaks without requiring removal of the valve from the railroad tank car are described herein. According to one aspect of the invention, a vacuum relief valve described herein may be inspected for leaks without removing the vacuum relief valve from the railroad tank car by using two or more access openings located on the body of the vacuum relief valve. According to another aspect of the invention, a vacuum relief valve described herein may be inspected for leaks without removing the vacuum relief valve from the railroad tank car by using an opening to an interior cavity of the valve body that is revealed by rotating a cover from a closed position to an open position.

The leakage testing device comprises a tank body and an oil level gauge body, the left end of the tank body is provided with an air inlet, the left end of the tank body is provided with a pressure relief valve, the right end of the tank body is provided with a pressure monitoring meter, the upper end of the tank body is provided with an oil level gauge connecting port, and the upper end of the oil level gauge connecting port is provided with a threaded connecting ring. The oil level indicator body comprises an oil level indicator pipe body and a glass observation window, the glass observation window is installed on the side face of the oil level indicator pipe body, a matching ring is installed on the outer surface of the oil level indicator pipe body, and a threaded connector is installed at the lower end of the matching ring. Air with specified pressure is pumped into the air inlet, the pressure monitoring meter is observed, inflation is stopped after the specified pressure is reached, soapy water can be coated around the glass observation window after pressurization is completed, whether bubbles are generated or whether the air pressure is reduced or not is observed at specified time, and therefore the purpose of checking is achieved.

A leak test station (50) for containers (C) housed in respective transport carriers (3), characterized in that it comprises a test carousel (51) which can rotate in continuous motion about a central axis (L) and comprises a plurality of test devices (5), each of which comprises: a movable bell (53) adapted to directly engage a carrier (3) so as to form a chamber (67) which houses said container (C); an opening (38) which is in fluid communication with the inside of said carrier (3), a vacuum generating mechanism (54) and a detection mechanism (55); a tracer gas injection mechanism (59) inside said bell (53) adapted to engage, in a gas-tight manner, a feed inlet (30) of a container (C) in the chamber (67).

The application discloses a kind of synchronous double liquid grouting device test methods, comprising the following steps: layout working condition simulation system connects the inner cavity of synchronous double liquid grouting pipe, and layout power control system connects the piston rod of synchronous double liquid grouting pipe;Load is applied to piston rod by power control system, and working condition simulation system controls piston rod to reciprocate along inner cavity, executes wear test;Different positions of piston rod are locked by power control system, and according to working condition simulation system, pressure oil is output to the inner cavity of synchronous double liquid grouting pipe, and executes pressure leakage test.The beneficial effects of the application: the working scene of the synchronous double liquid grouting device is simulated by the hydraulic system in the application to test the synchronous double liquid grouting device.No need to install real machine, can effectively reduce test cost, also can reduce test difficulty and requirement to test space.

The present invention provides a fluid component body having a leak test passage. [Solution] To test for leaks passing through each valve body seal of the manifold valve assembly 610, in an exemplary manner, the manifold assembly is installed in a fluid system under vacuum and connected to a leak detection device (e.g., a mass spectrometer), and a test fluid (e.g., a tracer gas such as helium or hydrogen) is sequentially supplied to each of the leak test ports 663a, 663b, and the leak detection device is used to measure the ingress of the test fluid into the valve cavities 612a, 612b that have passed through the body seal (e.g., due to discontinuities or contaminants in the bead section or outer seal surfaces 625a, 625b) to identify leaks in the body seal.

Provided is an automatic vapor generating machine for leak size estimation in a fluid system of a vehicle. The machine is configured for connecting to a source of pressurized gas. The machine generates vapor by heating a liquid in a vapor generating chamber that is thereafter conveyed into the fluid system. A controller controls the operation of the machine, including controlling an electrically controllable valve, a flow sensor, a pressure sensor, a heating switch and a display that is mounted on the machine. The controller has a processor and a memory that are programmed to execute instructions to run multiple leak test programs, collect and process data from the sensors, estimate leak sizes in the fluid system and display graphical representations of the test results on the display. The graphical representation allows the operator to analyze graphs and other data displayed on the display. A method therefor is also disclosed.

A memory sub-system causing execution of a first wordline leakage test of a first wordline group of a set of wordline groups of a memory block in response to determining a temperature of the memory block is within a threshold temperature range. A first result of the first wordline leakage test is determined. A second wordline leakage test of a second wordline group is caused to be executed and a second result is determined. A determination is made that the first result of the first wordline leakage test of the first wordline group satisfies a first condition. A determination is made that the second result of the second wordline leakage test of the second wordline group satisfies a second condition. In response to satisfaction of the conditions, an action is executed.

This application discloses an automatic leak testing method for an electrolytic cell, comprising: in response to a first command, automatically opening a first control valve on the connection line from the cathode gas phase outlet of the electrolytic cell to the hydrogen venting main, a second control valve on the connection line from the anode gas phase outlet of the electrolytic cell to the chlorine absorption main, and overflow control valves at the anode and cathode ends of the electrolytic cell; sending a drive command to the drive mechanism of the hydraulic cylinder of the electrolytic cell, thereby driving the hydraulic cylinder of the electrolytic cell to maintain the compression pressure of the hydraulic cylinder at 6.5 MPa, and adjusting the locking nut of the electrolytic cell to a released state via the drive mechanism; in response to a second command, opening the cathode liquid inlet control valve of the electrolytic cell to first inject cathode liquid into the electrolytic cell, and then, when the pressure difference between the cathode and anode reaches a first range, opening the anolyte inlet control valve of the electrolytic cell to inject anolyte into the electrolytic cell. This application improves the leak detection efficiency.

The utility model discloses a kind of porous ion conducting membrane air-tightness detection devices, including machine body, the bracket is fixedly installed in machine body upper, bracket is equipped with press-down driving assembly and horizontally arranged slider, slider is slidably installed on bracket, the action part of press-down driving assembly is connected slider;The bottom of the slider is fixedly installed with cover plate, the bottom surface of cover plate is upwardly provided with upper groove;The upper groove is communicated with first air pipe, first air pipe is communicated with air source by pressure regulating valve;The bottom plate is installed on the machine body, the lower groove is formed in the bottom plate;The lower groove is communicated with second air pipe, and second air pipe is connected with gas flow meter.The device can accurately and effectively detect the air tightness of porous ion conducting membrane, and the device uses flow method to select qualified porous ion conducting membrane by observing the size of gas flow, which can avoid the membrane with holes that cannot be observed by naked eye from being installed in the battery, and improve the performance and life of the battery.

The utility model relates to the technical field of cylinder cover tightness detection, in particular to an engine cylinder cover leakage testing device which comprises a workbench, a connecting table, an in-out assembly, a support, a leakage testing positioning assembly, a lighting piece and an image acquisition piece. One side of the workbench is connected with a connecting table, and the connecting table and the workbench are communicated and provided with guide grooves. The in-out assembly is connected to the connecting table and connected with the workbench. The in-out assembly comprises a mounting frame, a motor, a screw rod, a moving block and a connecting piece; the two mounting frames are connected with the workbench and the connecting table respectively, the motor is connected to the mounting frame at one end, the motor is in transmission connection with the screw rod, the screw rod is in threaded fit with the moving block, the moving block is connected with the connecting piece, and one end of the screw rod is connected with the mounting frame at the other end; the support is connected to the workbench. And one side of the bracket is connected with the lighting piece and the image acquisition piece. According to the utility model, the cylinder cover leakage test detection work efficiency is further improved, and the practicability of the engine cylinder cover leakage test device is improved.

The present invention relates to a method for leak testing of a sealed, insulated tank for storing cryogenic liquefied gas, the tank comprising a primary space (8) and a secondary space (6), wherein a pressure difference is generated between the two spaces (6 and 8) to conduct the test, and wherein at least a portion of the inert gas injected into the primary space (8) is withdrawn via at least one secondary outlet (19, 20 or 23) of the secondary space (6) for reinjection into the primary space (8).

The invention discloses a storage tank leakage simulation test device and system. The storage tank leakage simulation test device comprises a gas generation module, a gas leakage simulation module, a gas export module and a plurality of test gas detection modules. The gas generation module is used for generating leakage test gas; the gas leakage simulation module comprises a plurality of leakage simulation combinations, and each leakage simulation combination comprises a simulation leakage port and a corner pressing cylinder; the corner pressing cylinder is used for opening the simulation leakage port; the test gas detection modules are used for detecting leaked test gas and recording gas leakage detection duration, so that a worker can obtain an optimal combination mode of the plurality of test gas detection modules according to the gas leakage detection duration after multiple tests; the gas export module exhausts the leakage test gas. The oil and gas leakage can be flexibly controlled, the leakage condition of each leakage point can be detected at the fastest speed through the optimal combination mode of the multiple test gas detection modules, and the experiment precision and safety are improved.

The invention relates to the technical field of helium detection workpiece cleaning, in particular to a helium detection workpiece surface cleaning device which comprises a machine body, a soaking box is arranged in the machine body, two sets of machine bodies are slidably connected with placing frames, hydraulic cylinders are fixedly arranged on one sides of the placing frames, and the output ends of the hydraulic cylinders extend into the machine body and are fixedly connected with clamping plates. Supporting plates are fixedly connected to the two sides of the containing frame, guide rods are fixedly connected to one sides of the two sets of supporting plates, and protruding blocks are fixedly connected to the two sides of the machine body. Through cooperation between a rotating motor and a fan, after the rotating motor is started, the fan blows away a solution left on the surface of a workpiece during rotation, so that the workpiece can be rapidly drained, and meanwhile, through cooperation between a moving plate and a moving frame, when the moving plate is pushed, the workpiece can be rapidly drained. And the moving plate can push the fan to move by pushing the moving frame, so that the fan can uniformly and quickly blow away the solution on the surface of the workpiece in the moving process, and the workpiece draining efficiency is improved.

The invention relates to an adapter (10) for leak testing of at least one component (12) for an exhaust tract of an internal combustion engine, comprising an exhaust gas channel (14) through which exhaust gas from an internal combustion engine can flow, comprising a base element (18) which has a test channel (20) through which a fluid can flow and which opens to an environment (22) of the base element (18) and which can be arranged in a support system with the component (12), whereby the test channel (20) can be fluidically connected to the exhaust gas channel (14), and comprising a carrier (26) which has retaining elements (28) which can be moved on the component (12) into a respective retaining position (P) by arranging the base element (18) which is slidably held on the carrier (26) along a sliding axis (30), in which the retaining elements (28) engage behind a flange (24) of the component (12).

The utility model discloses a tool for testing leakage and adhesion of a rubber sealing element, which integrates a leakage test function and an adhesion test function, simulates the actual working environment of the sealing element by using a test medium supply system capable of accurately controlling pressure, and drives a pressing plate assembly with a profiling pressing head through a lifting mechanism. Automatic pressing and separation of the sealing element in a simulated assembly state are achieved, comprehensive detection of the sealing performance and the anti-adhesion characteristic of the rubber sealing element can be completed without a machine, and pressure attenuation and separation force of a test medium are monitored in real time through a pressure sensor and a tension sensor. According to the invention, quantitative judgment on leakage and adhesion degree is realized, so that the detection capability and the evaluation accuracy of early quality defects of the rubber sealing element are remarkably improved, a reliable basis is provided for quality control and process optimization in the production process, and the delivery quality and the use reliability of products are fundamentally guaranteed.

The utility model discloses a testing machine capable of automatically rotating to test leakage, which belongs to the technical field of testing equipment and comprises a supporting table, a notch is arranged at the top end of the supporting table, two first cylinders are mounted at the bottom end of the supporting table, a bearing plate is arranged at the bottom end of the supporting table, moving blocks are fixed on two sides of the bearing plate, a groove is arranged at the top end of the bearing plate, a water tank is arranged in the groove, and two straight notches are arranged in the groove. A clamping assembly is further arranged at the bottom end of the bearing plate. Second air cylinders are fixed to the two ends of the top face of the supporting table, a first moving plate and a second moving plate are arranged at the two ends of the top face of the supporting table correspondingly, and a first rotating rod and a second rotating rod are connected to the inner sides of the first moving plate and the second moving plate through a first bearing and a second bearing correspondingly; a first gear is fixed to the side face of the first rotating rod, a rotating shaft is connected to the outer side of the first moving plate through a driving motor, and a second gear is fixed to the other end of the rotating shaft; by using the testing machine, the high-precision rotation positioning requirement can be met, the detection efficiency is high, the omission ratio is low, and the enterprise detection requirement is met.

Method for controlling the drift of a leak detector and associated equipment. The invention relates to a method for controlling the drift of measurements of a leak detector (1) of a tracer gas in a piece of equipment (100), capable of performing a leak test cycle on a part to be tested (A) placed in a measuring chamber (101). The method comprises the following steps: injection of the tracer gas with a predefined concentration value into a pipe communicating with the leak detector (1); the leak detector (1) measures an internal concentration of the tracer gas; comparison of the measured value with the predefined concentration value; in case of a difference, determination of a correction factor; and application of the correction factor to the measured value of the tracer gas concentration in the measuring chamber (101) during said test cycle. The invention also relates to the equipment (100) for implementing said method. Figure for the abstract: Fig.1 .

To provide a leak test jig capable of accurately performing a leak test to a check valve of a button for an endoscope.SOLUTION: A leak test jig 71 includes: a jig body 75 having a jig body hole 76 into which the base 31 and the shaft body 55 are inserted; a first seal surface 77a that is a part of the inner surface forming the jig body hole 76 and against which the first seal ring 43a abuts while maintaining airtightness; a second seal surface 77b, which is another part of the inner surface forming the jig body hole 76 and against which the second seal ring 43b abuts while maintaining airtightness when the first seal ring 43a abuts against the first seal surface 77a; and a communication hole 82 disposed between the first seal surface 77a and the second seal surface 77b of the jig body 75 and communicating with the jig body hole 76 and a space outside the jig body 75.SELECTED DRAWING: Figure 10

The utility model discloses diesel oil filling and leakage testing equipment for an engine, relates to the technical field of engine testing, and solves the problem that potential safety hazards exist in existing testing equipment. The device comprises a protection box and an oil tank, the oil tank is installed in the protection box, an oil pump is arranged at the top of an inner cavity of the protection box, an oil inlet and an oil outlet of the oil pump are connected with a communicating pipe and an oil outlet pipe respectively, and one end of the communicating pipe is connected with an oil outlet of the oil tank through a flange. The top of the oil tank is further connected with an oil inlet pipe and an oil return pipe through flanges, one end of the oil inlet pipe and one end of the oil outlet pipe penetrate through the protection tank and extend to the outer side of the protection tank, and a first electromagnetic valve and a pressure gauge are sequentially arranged on the oil outlet pipe in the diesel flowing direction. A second electromagnetic valve is arranged on the oil inlet pipe, a third electromagnetic valve is arranged on the oil return pipe, and the first electromagnetic valve, the pressure gauge, the second electromagnetic valve and the third electromagnetic valve are all located in the protection box. According to the utility model, the waste of diesel oil can be effectively avoided, and the test safety is further improved.

The utility model provides a kind of medical oxygen humidifier leakage and pressure strength testing device, including protection box subassembly and fixed subassembly;Protection box subassembly includes box and lid, lid is hinged in box top portion;Fixed subassembly is placed in box;Fixed subassembly includes base, stand and fixing piece, stand is fixedly installed in base top surface, fixing piece includes sliding seat and the fixed clamp of fixed installation in the one side of sliding seat, sliding seat is slidably installed on stand, fixed clamp fixes the medical oxygen humidifier to be tested, places fixed subassembly in the box that is filled with water, so that medical oxygen humidifier is immersed in water, so that leakage test is simple and easy to use. Close the lid, protect medical oxygen humidifier, prevent bottle body breakage and produce splashing of debris. Testing device can satisfy leakage and pressure strength two test requirements in turn, provide safety and convenience for test personnel, and multiple medical oxygen humidifiers can be inspected simultaneously at a time, to improve work efficiency.

The invention relates to the technical field of medical equipment, in particular to a loop leakage testing method and equipment of medical equipment and a storage medium, a loop comprises an air bag, and the method comprises the steps that the loop is pressurized; determining compliance characteristics of the air bag; stopping pressurizing the loop, and determining the waiting time of the loop based on the compliance characteristic of the air bag; and determining the air pressure change of the loop before and after the waiting time so as to test whether the loop leaks or not. According to the embodiment of the invention, the waiting time of the loop is determined according to the compliance characteristics of the air bags, so that the leakage condition of the loop is deduced, accurate testing of the air bags of various types and sizes is realized, the accuracy and reliability of the loop leakage test are greatly improved, the need of extra configuration of system software is avoided, and the reliability of the loop leakage test is improved. And the robustness of a test result is ensured.