Device for testing hollow articles on thermal stability
(57) Abstract:Use: to test the technique, when testing hollow articles on thermostability. The inventive device includes two Autonomous loop circulation of hot and cold environments, test article, United channels with the respective paths, and means for removal of the medium from the product. Means for draining of the environment in the form of channels connecting the test item with suction cavities circulation contours. This action prevents thermal Cycling of the nodes and this increases their durability and reliability. 1 Il. The invention relates to test equipment, in particular to devices for testing hollow articles on thermostability.Testing technique that provides testing hollow articles on thermal stability, in addition to performing its main technical tasks must meet the following requirements:
should be excluded termomagnitnye nodes stand that will allow you to achieve high reliability and durability of the stand;
the design of the stand must be optimized from the point of view of energy consumption.Known installation [race environments the circuit hot water heater, the cold water circuit with a fridge, electric pump, KD, mixing tank, shared paths, two channels, each of which connects the circuit hot environment with heater and circuit cold environment for a refrigerator with a mixing capacity.The disadvantages of this device are:
1) thermal Cycling of the unit when the mode is changed terminallerine, which leads to a decrease of the durability and reliability of the installation;
2) increased energy expenditures, caused by heating or cooling medium in relation to the temperature in the mixing tank modes terminallerine.These drawbacks are partially addressed in  contains two self-loop circulation of hot and cold environments and a means for removal of the medium from the internal cavity of the test items.The disadvantages of this setup are periodic loss of contours installation with depending on the mode terminallerine the test items of different temperature condition, which leads to thermal Cycling of the nodes located on the drain to the environment from the test items, and increase energy consumption.eucast on author. St. N 1065733 adopted for the prototype.The purpose of the invention the exception of thermal Cycling of the nodes of the stand, which in turn can increase the reliability and durability of the device simultaneously, a significant reduction of energy consumption.This objective is achieved in that in each circuit means for draining environment performed as part of the piping with shutoff valves, one end of which is communicated with a suction cavity of the circular pump, and the other is in communication with the channel for supplying a medium.These differences are significant, as by the above means is supplied from the test items in the circuit, the temperature of which has environment.The drawing shows a schematic diagram of an apparatus for testing hollow articles on thermostability.The device includes:
offline circulation contours cold 1 hot and 2 environments;
test item 3 channels 4, 5 for the supply of hot and cold environments, respectively;
channels 6, 7 connecting through the locking device 8, 9 test item to the suction cavities hot and cold circulation contours.On these to the RA circulation includes:
the pump 12, 13;
the pressure compensator 14, 15 gauges;
shut-off valves 16, 17 and 18, 19;
bypass sections 20, 21;
the temperature sensors 22, 23, controlling the temperature of the fluid paths.In addition, the composition of the cold loop includes refrigerator 24, hot circuit, the heater 25.The operation of the device is as follows.Initially, the parameters of the hot and cold circuits are brought to specified values.Monitoring the temperatures of the environments produced by the sensors 22 and 23, respectively.To the subject product 3 channel 4 through the locking device 16 is fed to the cold environment, which is then removed from the test items on the channel 5 and the locking device 17 in the circuit cold environment.At this time, the circulation in the circulation loop hot medium 2 is performed via the bypass section 21.When the mode is changed terminallerine opens the valve 18, 9, close valves 16, 17 and by means of pump hot circuit 13, the displacement of the cold environment of the internal cavity of the test items in the circuit cold environment 1.The control mode is provided a temperature sensor 11, the corresponding temperature of the hot circuit, with the locking device 9 is closed, and a locking device 19 is opened. Is the hot air terminallerine of the test items. Circulation in the circulation loop cold medium 1 is performed via the bypass portion 20.In the subsequent mode is changed terminallerine of the test items (cool mode) open the shut-off device 16, 8, closed shut-off devices 18, 19.Is the displacement of the hot medium from the internal cavity of the test items in the circuit hot medium 2 via a pump cold circuit 12.The control mode of displacement of the cold environment is the temperature sensor 10.Eviction protection ends when the sensor 10 corresponding to the temperature of the cold circuit, with the locking device 8 is closed and the shut-off device 17 is opened. Is the mode of cold terminallerine of the test items.Further cycles terminallerine again.To provide a reciprocating motion in the tested product, it is advisable to place the vertical whom I testing hollow articles on thermal stability, along with significant reduction of energy consumption eliminates thermal Cycling as the main contours of circulation (cold or hot), and means providing for the removal from the test item, which increases the reliability and durability of the device. Device for testing hollow articles on the heat resistance, containing two self-loop circulation of hot and cold environment, each of the circuits consists of a communicated with each other through the piping of the circulation pump with a suction cavity, pressure compensator, temperature sensors, valves, means for draining medium and channel for supplying a medium to the product, characterized in that each circuit means for draining environment performed as part of the piping with shutoff valves, one end of which is communicated with a suction cavity of the circulation pump and the other is in communication with the channel for supplying a medium.
FIELD: testing engineering.
SUBSTANCE: device comprises high-frequency generator and inductor connected in series, device for control of heating, system for air supply, device for external cooling, measuring system, unit of contact temperature gauges, and device for bottom clamping connected with the end section of the blade. The device is provided with a means for axial loading, device for top clamping connected with the shelf of the end section of the blade, device for control of axial loading, first dynamometer, device for applying torque, which has the second dynamometer, device for information input, load-bearing frame, contactless temperature gauge, generator of nonstandard signals, oil pumping system, and device for internal cooling.
EFFECT: enhanced reliability of testing.
7 cl, 1 dwg
FIELD: measuring technique.
SUBSTANCE: method comprises heating the heat-shield structure from one side up to a high temperature, cooling the structure, applying marker dots on the section of the outer surface under study, cutting the axisymmetric specimens of the heat-shield structure, applying marker dots on the side of the specimen at a given distance from the inner surface, cutting the specimen over the planes perpendicular to its longitudinal axis and passing through the marker dots into pieces, subsequent heating of the pieces in the atmosphere of an inert gas, recording the change of weight of the pieces, recording the temperature of the beginning of the decrease of weight of each piece, and judging on the spatial temperature distribution from data obtained.
EFFECT: expanded functional capabilities.
SUBSTANCE: stone sample saturated with water is frozen to a specified temperature. The sample is unfrozen and deformation is measured. Before freezing, the threshold load which accounts for long-term compression strength of the sample is measured using a nondestructive method. After several thermal cycles, residual deformation of the unfrozen sample is measured in the direction perpendicular the previous compression. A least residual deformation is achieved through periodical compression of the sample in the current direction from zero to a load which exceeds the threshold by not more than a third. The number of thermal cycles required for reducing long-term strength to the required value is determined by repeating these operations.
EFFECT: reduced labour input and increased efficiency.
SUBSTANCE: method of determining heat resistance of bentonite clay is characterised by that, a nomograph which reflects dependency of temperature of the second endothermal effect and heat resistance of bentonite clay from contained structural iron is constructed first. For this purpose samples of bentonite clay from known deposits are analysed. The samples are tested in a derivatograph. Derivatograms with differential thermo-weighted (DTW) and differential thermal (DT) curves are obtained, from which temperature of the second endothermal effect is determined depending on structural iron contained in the samples. Heat resistance of the samples is determined depending on structural iron contained in the samples. From the said two curves, the said nomogram is constructed, which is then used for subsequent determination of heat resistance of the analysed bentonite clay; a wet ground up sample is tested in a derivatograph by heating followed by drying. Derivatograms with differential thermo-weighted and differential thermal curves are obtained, from which temperature of the second endothermal effect is determined and heat resistance of the analysed bentonite clay is determined from the said nomogram.
EFFECT: cutting on time and simplification of the process of determining heat resistance.
SUBSTANCE: device has a cylindrical housing, a horizontal partition wall and sensors for monitoring and controlling tests. Inside the cylindrical housing, which has a flat bottom and an air-tight cover which is fixed by bolts and nuts in the top part, there is a drum which is mounted on the cover inside the housing. The horizontal partition wall is placed in the bottom part of the drum and is in form of a perforated disc whose perforations are in form of calibrated orifices lying on a circle, having along their edge calibrated channels for passage of heating medium. Inside the drum there is an additional horizontal partition wall with calibrated orifices which are exactly as those in the perforated disc. Sample pipes are fitted in the perforations of the disc and are fixed on the cover of the housing, and there are vertical partition walls between the pipes. Pipes with a smaller diameter are fitted inside each sample pipe and are fixed in a dispensing receiver and have in their top part connecting pipes for outlet of cooling medium and discharge pipes with calibrated devices on them. In the bottom part of the housing under the perforated disc there is a pipe with a diffusion nozzle connected to a cylindrical diffuser and a connecting pipe for inlet of heating medium and a system of chambers with a connecting pipe at the bottom for outlet of the heating medium.
EFFECT: high quality and accuracy of tests and efficiency thereof.
SUBSTANCE: invention relates to space hardware testing, namely to installations for simulation of spacecraft components operation modes. Installation for vacuum thermocycling of photoconverter panels includes vacuum chamber consisting of two communicating compartments. In one compartment, two cryopanels are installed in parallel with possibility to place tested panel between them. In the second compartment there is thermal panel made as assembly of filament lamps. The cryopanels and thermal panel are positioned vertically, and thermal panel compartment is placed over cryopanel compartment. The cryopanels are installed with possibility of additional placement of thermal panel between them. The thermal panel is provided with reciprocating mechanism of vertical action and thermal insulation at the side facing cryopanel.
EFFECT: higher accuracy of thermal simulation of outer space conditions.
3 cl, 4 dwg
FIELD: testing equipment.
SUBSTANCE: device comprises a body with a flange joint and tested samples in the form of tubes. Tested samples in the amount of two arranged coaxially one inside the other to form a circular gap between them, are fixed inside separate parts of the body, placed on a header of hot water and a header of drainage of a mixture of hot and cold water. Headers by means of pipelines are connected to a heater and a refrigerator. The outer surface of the outer tube and the inner surface of the central tube are coated with a layer of insulation. In the upper part of the body there is a nozzle and a valve for supply and control of cooling water flow.
EFFECT: elimination of medium working pressure impact at process of crack formation, providing for pure crack formation only due to pulsation of medium temperature, which results in getting absolutely accurate testing results.
FIELD: test equipment.
SUBSTANCE: stand includes base, coaxial sample grips mounted on the base, sample loading device connected to the grips, mechanical sample processing device and platform for processing devise movement against grip axes. Additionally the stand features aggregate for grip turning around grip axis, consisting of drive with two gear wheels bearing the grips, on the drive shaft.
EFFECT: extended functionality of stand due to test performance at changing directions of mechanical processing against radial directions of sample.
FIELD: testing equipment.
SUBSTANCE: invention relates to testing equipment, to tests of mostly samples of rocks. The bench comprises a base, sample grips installed on it coaxially, a device to load a sample with an axial mechanical load, a mechanism for interaction with the sample, a platform for movement of the mechanism along the axis of the grips, a platform for movement of the mechanism in the vertical direction perpendicularly to the axis of the grips and a platform for movement of the mechanism in the horizontal direction perpendicularly to the axis of the grips. The mechanism for interaction with the sample is made as milling.
EFFECT: expansion of functional capabilities of a bench by provision of research with gradual removal of material sample without removal of mechanical load.
FIELD: test equipment.
SUBSTANCE: device includes gas generator and operation part with structural material sample, connected in series. Gas generator features removable mixing head. Cylindrical combustion chamber of the gas generator features ignition device and orifice plate. Operation part includes interconnected clamping flange with central hole and flange holding a sample. Central longitudinal axes of flange and sample are coincident. Internal cylindrical surface of clamping flange forms an annular slot with the sample surface, the slot joins a cavity ending with output nozzle through end outlet holes in the flange around sample.
EFFECT: possible maintenance of required pressure-heat loading modes for samples, modelling natural thermal stress state of structural materials of various aggregates operating in alternate heat modes.