Potted circuit

FIELD: machine building.

SUBSTANCE: device comprises a casing (1), at the end (2) of which there is a hollow (3) communicated with the inner cavity (4) of the casing (1). A catch pin (5), the entire outer surface (6) of which is cylindrical, and two radial sealing rings (7, 8) of elastomeric material are located in the hollow (3). Wherein one of the sealing rings (7) is placed in a groove (9). On the casing (1) a union (10) for fluid supply is located with channel (11) outgoing to cavity of the boring (3) at area between the sealing rings (7, 8). The catch pin (5) is provided with a chamfer (13) and mounted with the ability of axial movement relative to the casing (1) and fixing in two positions: in initial, when channel (11) of the union (10) is connected with internal cavity (4) of the casing (1), and final, when the channel (11) of the union (10) is isolated from the internal cavity (4). A stop (15) is made to limit axial movement of the pin (5) in the device. A dual stage bore back (15) is made in the hollow (3) on the end (2) side of the casing (1). The width of the first stage (16) of the bore back (15) is equal to the width of the hollow (3) groove (9) and the diameter of the first stage (16) is equal to the groove (9) outer diameter. The diameter of the second bore back (15) stage (17) opening onto end (2) of the casing (1) is greater than the diameter of the first stage (16). Stopper (18) with the thrust into a throat (19) between the stages (16, 17) of the bore back (15) is arranged inside the second stage (17) of the bore back (15) coaxially to the hollow (3). The sleeve (18) is provided with a lock (20) of the axial position placed outside the cylinder (21) formed by the surface of the hollow (3). The inner diameter of the stopper (18) is equal to the diameter of the hollow (3). The second O-ring (8) is located inside the first stage (16) of the hollow (15).

EFFECT: increase of device manufacturability with repeated usage.

2 dwg

 



 

Same patents:

Sealed device // 2558274

FIELD: machine building.

SUBSTANCE: invention relates to the machine building, and can be used during testing of cavities of the devices of aviation and rocketry crafts, and in other applications. Essence of the invention: device contains casing (1) with boring (3) connected with internal cavity (4) of the casing (1). In the sealing grooves (8, 9) of the boring (3) a pin (5), two radial sealing rings (6, 7) out of elastomer are installed. On the casing (1) a union (11) for fluid supply is located with channel (12) outgoing to cavity of the boring (3) at area between the sealing grooves (8, 9). The pin (5) is installed with possibility of axial movement relatively to casing (1) and securing in two positions: in initial - when channel (12) of the union (11) is connected with internal cavity (4) of the casing (1), and final - when the channel (12) of the union (11) is isolated from the internal cavity (4). The device contains also stop (15) to limit axial movement of the pin (5) in its end position. All external surface (10) of the pin (5) is made cylindrical. Stop (15) to limit the axial movement of the pin (5) in its end position is made in the boring (3) and is located between the first (8) sealing groove and internal cavity (4). End (16) of the pin (5) most far from the internal cavity (4) is made flat and perpendicular to the cylindrical surface (16) of the pin (5).

EFFECT: simplified design, reduced overall dimensions and weight.

2 dwg

FIELD: instrumentation.

SUBSTANCE: invention relates to vacuum engineering, namely to static magnetic mass spectrometer analysers with 180-degree rotation and double magnetic focusing, and can be used in gas leak detectors, including the helium ones, intended for tightness test of various systems and objects allowing pumping from internal cavity down to deep vacuum or its filling with helium-containing mix or another test gas at overpressure. The mass spectrometer analyser of gas leak detector contains the vacuum chamber with connecting flanges inside which the following is contained: a source of ions of test gas substance consisting of a source of electrons and an ionisation chamber; a magnetic system providing mass separation of ions; ion receiver. Meanwhile the source of electrons is the plasma cathode based on the glow-discharge plasma that is the Penning cell placed in an axial magnetic field with the emitter of electrons implemented as a slot for formation of a tape electron beam in the cell anti-cathode from the ionisation chamber. It is preferable to provision in the central part of the Penning cell anode the holes for "pumping" of residual gas from the vacuum chamber.

EFFECT: improvement of reliability and increase of service life of the mass spectrometer analyser; smoothing of vacuum requirements.

8 cl, 4 dwg

FIELD: test equipment.

SUBSTANCE: invention relates to the field of testing of devices for air-tightness and can be used for determination of tightness of the articles operating under external pressure, in particular space equipment articles. Essence of the invention: an internal cavity of an article is evacuated through the testing system down to steady-state equilibrium pressure in a product and the testing system.. An article is disconnected from the testing system, while continuing evacuating the testing system. The first steady-state equilibrium pressure in the testing system is measured that corresponds to inflow into the testing system of own flow of gas separation and a leakage of the testing system. The calibrated leak is connected to the testing system. The steady-state equilibrium pressure in the testing system is measured that corresponds to inflow into the testing system of own flow of gas separation and a leakage of the testing system and gas flow from the calibrated leak. The calibrated leak is disconnected from the testing system. The article is connected to the testing system. The steady-state equilibrium pressure corresponding to inflow into the testing system of a flow from the article leakage and own flow of gas separation and leakage of the testing system is measured. The article is disconnected from the testing system. The second steady-state equilibrium pressure is measured that corresponds to inflow into the testing system of own flow of gas separation and a leakage of the testing system. The level of leakage of the article is determined on the basis of the value of gas flow from the calibrated leak and values of the named pressure. Meanwhile after pumping out of an internal cavity of the article through the testing system until the steady-state equilibrium pressure in the article and disconnection of the testing system and the article from the testing system the testing system section with the known volume which is interconnected with the calibrated leak is disconnected from evacuation devices. And the calibrated leak is connected to the testing system section with the known volume. Gas flow from the calibrated leak is measured by the rate of pressure rise formed it in the testing system section of known volume. The calibrated leak is disconnected from the testing system section with the known volume. After that the testing system section with known volume is connected to the evacuation devices and the cooled trap of the evacuation devices is cooled down. Meanwhile the measurements of all steady-state equilibrium pressure values, connection and disconnection of the calibrated leak and the article are performed after a cooling down of the cooled trap of the evacuation devices. And the temperature of the cooled trap of the evacuation devices shall be equal to the temperature at the workplace.

EFFECT: improvement of accuracy of determination of air-tightness of articles, increase of service life of articles.

1 dwg

FIELD: aircraft engineering.

SUBSTANCE: invention can be used for spacecraft airframe tightness control in flight or in vacuum tests. Air pressure is developed inside spacecraft airframe. Airframe parts are blown with trial fine substance with small full sublimation time under test conditions (for example, carbon dioxide in solid state). Local leaks are revealed by registration of variation in lines of flow of completely evaporating trial fine substance under effects of gas outflowing from airframe.

EFFECT: accurate and adequate detection of leaks.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: stratum is impact cyclically, at that each cycle of impact includes gas injection to the stratum with further gas extraction. The stratum is impacted during 10 cycles at least. In each cycle current formation pressure as well as gas extraction (or injection) volume is measured simultaneously in gas- (Pt''ф'') and water-bearing (Pt''фв'') zone of the storage facility, then considering the measured parameters the design pressure in the underground storage facility (Pt''P'') is defined for the facility operation mode without gas losses and operation mode with gas losses. Then function (F) is defined as arithmetic mean value of deviations (Pt''P'') from (Pt''ф''), which are received for each ith measurement for the facility operation mode without gas losses and the function (Fy) for the facility operation mode with gas losses and when inequality Fy<F is satisfied the summary is made about available gas leaks in the storage facility.

EFFECT: simplifying control of gas leak-tightness, improving reliability and safety of the underground storage facilities made in the water-bearing strata.

1 tbl

FIELD: measurement equipment.

SUBSTANCE: proposed bench for investigation of equipment and processes of trenchless repair of pipelines includes the following components installed on a base: an investigated pipe, where an investigated flexible sleeve folded twice with inversion is located, and its outer edge is fixed on the pipe, a system of pressure creation at the sleeve and a dynamic mechanism in the form of a movable weight on the block, and a traction dynamometer, installed in a detachable manner as capable of autonomous connection with the inner edge of the sleeve, at the same time the source of pressure at the sleeve is a compression cylindrical chamber mounted as capable of autonomous connection with a compressor and with a hydraulic recirculation system, and connected with an investigated pipe in the area of fixation of the outer edge of the sleeve by means of a replaceable attachment, and also equipped with a pneumatic gate connected to the compressor, and the gate comprises a body and an inner elastic collar capable of displacement of the sleeve in it, the inner edge of which is connected to a dynamic mechanism, besides, the compression chamber is equipped with winding coils as fixed on the central shaft perpendicular to the central axis of the investigated pipe, the inner one, capable of sleeve winding with its inner edge, and the outer one, capable of autonomous connection with a movable weight or a traction dynamometer of the dynamic mechanism.

EFFECT: provision of multi-variant determination of head and average speed of water flow, head loss, kinetic energy coefficient, coefficient of hydraulic friction at various combinations of loads at different models of pipes and sleeves.

10 cl, 4 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: in compliance with this method, seam is subjected to cycling, every cycle including gas injection therein with subsequent gas withdrawal. Cycling includes at least 10 cycles. Current seam pressure (Ptf) and gas withdrawal (or injection) volume are measures at regular intervals in every cycle. Measured parameters allowed for design pressure in underground storage facility (Ptd) is determined for facility operation without gas leaks and with leaks. Function (F) is defined as mean arithmetic value of (Ptd) deviations from (Ptf) obtained at every ith measurement for operation without leaks and function (Fl) for operation with leaks. Given Fl<F, leaks are considered available.

EFFECT: simplified control, higher safety and reliability.

1 tbl

FIELD: heating.

SUBSTANCE: water vapour (working medium) is supplied into a vessel continuously with the levels of internal pressure and temperature of the working medium being kept constant. The vessel surface is scanned by a heat sensitive device and the heat contrast is recorded. The sighting axis of the heat sensitive device is set at an angle to the surface being controlled. Temperature change is calculated depending on the specified permissible leakage rate. Values of measured temperature changes at the controlled surface are compared to the design value of the temperature change. At the design temperature value exceeding the measured value a presence of a defect and its location are considered.

EFFECT: improved reliability of leakage detection.

2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to tightness tests and can be used for performing tightness tests for filer (2) intended for removal of aerosols and dust from gas volume flow. Loader (16) feeds test aerosol upstream of filter (9) to unpurified gas flow if seen in flow direction. Quantity of particles is measured and/or concentration of particles are defined, is seen in flow direction, in gas purified flow downstream of filter (9). Note here that first mixed volume flow of test aerosol and compressed air is fed into said loader (16) that makes an aerosol generator (37). First mixed flow produced with the help of aerosol generator (37) is mixed with volume air flow to produce second mixed volume flow of higher rarefaction. Produced second mixed volume flow is fed into loader (16).

EFFECT: minimised compressed air flow rate.

12 cl, 5 dwg

FIELD: testing equipment.

SUBSTANCE: invention relates to the field of machine building, in particular, to testing equipment, and makes it possible to perform a full complex of product testing for tightness. The method is proposed to test the product for tightness, which consists in the fact that the product 6 is placed into a tight test chamber 1, equipped with systems of cooling 3 and heating 4. After vacuumising of the product 6 cavity, a control medium is sent in it, by increasing temperature they bring the control medium into the state of the supercritical fluid, then they perform operations of registration and measurement of the flow of the control medium penetrating in through microleaks of the product. The control medium in the form of a gas phase of liquefied gas or in the form of a liquid is supplied into the cavity of the product for testing in the amount Mo=VρcrРflРcrТcrТfl,kg, where V - volume of the product cavity, l; ρcr - critical density of the control medium substance, kg/l; Pfl - required pressure of the supercritical fluid in the product cavity during tests in the range of values Pcr≤Pfl≤3Pcr, kgf/cm2; Pcr - critical pressure of the control medium substance, kgf/cm2; Tcr - absolute value of critical temperature of the control medium substance, K; Tfl - absolute temperature of the supercritical fluid in the cavity of the product when testing in the range of values Tcr≤Tfl≤2Tcr, K. Supply of the gas phase of the liquefied gas with total amount Mo is carried out into the cavity of the product 6, previously cooled down to the temperature with the operating system of heat removal, at the same time the flow rate of the supplied gas: GNQr+Clq(totu),kg/s, where NQ - thermal capacity of the system of heat removal from the surface of the product, kJ/s; tu - temperature of the product during filling of the cavity with gas, °C; tcm - temperature of hardening of the control medium in the liquid phase; Clq - heat capacity of the condensed control medium at temperature t=to+tu2, kJ/kg·degrees; r - heat of condensation of the gas phase of the control medium at temperature t=to+tu2, kJ/kg; to - temperature of environment during the test,°C.

EFFECT: invention expands process capabilities of a test due to usage of different control gas and liquid media, and also to increase sensitivity and reliability of control of products with especially high requirements for tightness.

2 cl, 2 tbl, 1 dwg

FIELD: testing equipment.

SUBSTANCE: method includes placing product into hermetic chamber, forming a pressure change on product walls, and pressurization is evaluated by comparing pressure in chamber to control pressure, which matches previously measured pressure in same chamber with hermetic standard product, identical to controlled one, while pressure change in chamber with hermetic standard product and controlled product is formed by changing gas amount therein for one and same value, and pressure in chamber is measured in same time after forming pressure change, if pressure in chamber matches control pressure. Pressurization is evaluated on basis of change of pressure in certain time duration, and as standard product a product with minimal volume is selected, maximally close to allowed limit for control product.

EFFECT: higher trustworthiness.

2 cl, 2 dwg

FIELD: space technology.

SUBSTANCE: unconfined space of gas chamber of hydro-pneumatic compensator is subject to periodical change at the same average-mass temperature of heat-transfer agent. The ratio of Vi≤(Vi+l+nϕ) 1) is used to judge if leak-proofness corresponds to standard value, where Vi is volume of gas chamber of hydro-pneumatic compensator for i-th measurement, Vi+l is volume of gas chamber of hydropneumatic compensator for subsequent measurement, n is time interval between i-th and i+1 measurement, ϕ is standard value of volumetric loss of heat-transfer agent during specific time interval. Difference in unconfined spaces achieved between (i+1)-th and i-th measurement is used to determine real leakage of heat-transfer agent from system during specific time interval. Current value of unconfined space of system hydro-pneumatic compensator gas chamber is measured instead of measuring working pressure of the system for the same average-mass temperature of heat-transfer agent. Difference between measured spaces related to time interval between measurements has to be value of real leakage of heat-transfer agent observed during specific time interval.

EFFECT: simplified and reliable method of inspection.

FIELD: rocket manufacturing.

SUBSTANCE: sealing of the gas system in the points of installation of the functional members is preliminarily performed by simulators of the control actuator functional members. Then the preset value of air pressure in the source of pneumatic supply is set, and air is fed to the control actuator gas system through a service storage vessel, in which the air pressure is measured. The gas system passage flow sections are estimated by comparison of the value of the measured air pressure in the service storage vessel with the maximum allowable value. The device uses a service storage vessel made with inlet, outlet and measurement connections. The service storage vessel communicates with the source of pneumatic supply through the inlet connection, with the specimen under test-through the outlet connection, and with the pressure gauge - through the measurement connection. The inlet and outlet connections are installed on the front and rear walls of the service storage vessel respectively, and the measurement connection is installed on its side surface. The inlet connection is provided with a measuring orifice with a flow section area making up 0.7 to 0.9 of the allowable passages of the control actuator, and the flow section area of the outlet connection exceeds the allowable minimum sections area of the passages of the control actuator gas system at least by 5 times.

EFFECT: enhance accuracy of check and reduced labor content of the test.

2 cl, 2 dwg

FIELD: testing technology; estimation of untightness of full-scale compartment of flying vehicle provided with drainage devices.

SUBSTANCE: proposed method includes blowing the thermostatting medium into compartment for forming pressure differential between external and internal pressure under ground conditions which correspond to pressure differentials acting on compartment in flight. Untightness of compartment is estimated by measured flow rates, pressure differentials and temperature in compartment, after which decision is taken for retrofitting of compartment or change of number of drainage devices.

EFFECT: enhanced accuracy of estimation of untightness; enhanced reliability; low cost.

3 dwg

FIELD: testing engineering.

SUBSTANCE: method comprises connecting the article to be tested with a flexible vessel mounted inside the chamber, filling the receiver and bubbler with gas under controllable pressure, and filling the article and flexible vessel with liquid. The leakage is judged by gas bubbles liberated from the pipe of the babbler.

EFFECT: enhanced reliability of testing.

1 dwg

FIELD: non-destructive testing.

SUBSTANCE: flaw detector comprise housing, means for measuring and processing data of measurements, pickup for non-destructive testing mounted in holders which in turn are set on the housing of the flaw detector with the use of at least a pair of levers. From the bow side of the flaw detector the lever and pickup holder are provided with one or several members which bear on the inner side of the pipe.

EFFECT: improved design.

5 cl, 4 dwg

FIELD: electric engineering; measurement technology.

SUBSTANCE: method can be used for inspection of integrity of electric insulation. According to the method item is placed into transparent chamber filled with special liquid and is subject to physical action. Tightness of item is judged from bubbles of gas. Physical action concludes in applying physical load during 10-600 seconds and electrical load is set within range of 500-2500 V. Transformer oil is used as technical oil with water content of 0,01-0,1%.

EFFECT: nondestructive detection of defects in tightness.

FIELD: testing engineering.

SUBSTANCE: method comprises setting the vessel with a fluid into the testing chamber which is evacuated at least up to the pressure of saturated vapor for the fluid, measuring the ambient pressure and pressure inside the testing chamber, and detecting the leakage by measuring the change in the ambient pressure caused by the evaporation of the fluid inflowing due to leaking.

EFFECT: reduced cost and enhanced accuracy of testing.

65 cl, 20 dwg

FIELD: testing equipment.

SUBSTANCE: tank is mounted in testing chamber, which is drained until at least pressure of steam of liquid component. Pressure in surrounding space is controlled and in test chamber respectively as well. Leak is detected by controlling pressure change in space surrounding tank, which occurs because of liquid evaporation, liquid coming from leak location and evaporated in surrounding space with low pressure.

EFFECT: higher precision and lower costs.

47 cl, 20 dwg

FIELD: the invention refers to the field of testing technique.

SUBSTANCE: at examination of containment of capacities difference between the pressure in the capacity and the pressure around it is set up and according to the changing of one of this pressures one can judge whether the capacity complies with the given terms of controlling or not. At first according to the invention the meaning of the control pressure is memorized when random deformations of the capacity collusive to difference of pressures fell the pressure is compared with controlling meaning. The arrangement has a source of pressure, interacting with controlling capacity, a pressure sensor and a storage block of meanings of pressure, a controlling block for launching of the process of memorization in the storage block after completing the process of random, collusive to difference of deformation pressures on the capacity.

EFFECT: simplification of means of controlling containment with securing possibility of early detection of capacities with great flow.

20 cl, 6 dwg

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