CN108254130B - Wind tunnel device for continuous high-temperature sealing performance test - Google Patents

Wind tunnel device for continuous high-temperature sealing performance test Download PDF

Info

Publication number
CN108254130B
CN108254130B CN201711488687.8A CN201711488687A CN108254130B CN 108254130 B CN108254130 B CN 108254130B CN 201711488687 A CN201711488687 A CN 201711488687A CN 108254130 B CN108254130 B CN 108254130B
Authority
CN
China
Prior art keywords
temperature
air
sealing
test
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201711488687.8A
Other languages
Chinese (zh)
Other versions
CN108254130A (en
Inventor
王维民
巴全坤
纳磊
户东方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Chemical Technology
Original Assignee
Beijing University of Chemical Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing University of Chemical Technology filed Critical Beijing University of Chemical Technology
Priority to CN201711488687.8A priority Critical patent/CN108254130B/en
Publication of CN108254130A publication Critical patent/CN108254130A/en
Application granted granted Critical
Publication of CN108254130B publication Critical patent/CN108254130B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00Aerodynamic testing; Arrangements in or on wind tunnels
    • G01M9/02Wind tunnels

Abstract

The invention discloses a wind tunnel device for continuous high-temperature sealing performance test, which comprises an air compressor, an air bottle, a normal-temperature pressure gauge, a stop valve a, a pressure reducing valve, an air flow meter a, a pipeline type air heater, a stop valve b, a high-temperature thermometer a, a high-temperature pressure gauge, a test section, an air flow meter b and a high-temperature thermometer b And (3) testing the sealing and heat insulation parameters of the test piece under different pressure difference conditions and different temperatures.

Description

Wind tunnel device for continuous high-temperature sealing performance test
Technical Field
The invention relates to a wind tunnel device for continuous high-temperature sealing performance test, which is mainly used in the technical field of sealing performance test of various materials such as aviation sealing materials and the like.
Background
The high-temperature sealing plays an important role in industrial production and is widely applied to various high-temperature reaction furnaces and combustion chambers in the energy industry. High-temperature sealing is also widely applied in the aerospace industry, and the sealing performance has a decisive influence on the performance of the aircraft. For example, the X-51A hypersonic test aircraft which is tried in the United states is the first flight test that the preset Mach number cannot be reached because of the leakage of the seal between the engine and the jet nozzle. With the rapid progress of aerospace technologies and the more and more complex military evolution of all countries, all countries are competitive hypersonic aircrafts with faster development speed and longer flight distance. At present, high-temperature sealing becomes a key factor for limiting the flight speed and the reliability of an aircraft.
Wind tunnels (wind tunnels), wind tunnel laboratories, are a tunnel-like experimental facility that artificially generates and controls air flows to simulate the flow of air around an aircraft or a solid body, and that can measure the effect of the air flows on the solid body and observe physical phenomena, and are one of the most common and effective tools for aerodynamic experiments. Wind tunnel experiments are an indispensable component in aircraft development work. The method plays an important role in the research and development of aviation and aerospace engineering, and is indispensable in the fields of transportation, building construction, wind energy utilization and the like along with the development of industrial aerodynamics. The experimental method has the advantage that the flow conditions are easy to control. During experiments, the model or the real object is often fixed in a wind tunnel for repeated blowing, and experimental data is obtained through measurement and control instruments and equipment. The sealing performance test bench plays an important role in promoting the progress of sealing technology. In order to research the heat sealing and air tightness of the sealing element at high temperature, a high-temperature wind tunnel test becomes an important means. The arc wind tunnel is a high-temperature wind tunnel commonly used at present, high-pressure airflow is heated by an arc heater during operation, the high-temperature airflow is expanded and accelerated through a spray pipe to form high-temperature jet flow, a test piece arranged at the outlet of the spray pipe is subjected to an ablation test, the tested airflow enters a diffuser for deceleration, and the airflow enters a vacuum container after being cooled to normal temperature through a cooler.
At present, domestic electric arc wind tunnels generally adopt a method of metal wire heavy current melting arc striking to start an electric arc heater, but a series of problems which cannot be overcome are also exposed in the using process. Such as: (1) the preparation time is long, the vacuum of the test section must be released every time the test is completed, and the vacuum pumping is carried out again after the metal wire is installed; (2) the reliability is poor, and the wire can be connected and blown off due to a slightly large air flow; (3) the slag affects the safety of the equipment, and the incompletely molten metal wire falls between the electrodes, so that the insulation is reduced, partial discharge is caused, and the equipment is burnt; (4) the melted metal wire powder blocks the pressure measuring pipeline to influence the parameter test.
The existing high-temperature sealing performance testing devices generally measure a plurality of parameters independently, for example, the leakage rate of a sealing element under different compression amounts and different pressure difference environments is tested under the normal temperature condition, the heat insulation performance of the sealing element is tested by heating and pressurizing in a heating furnace, the high-temperature sealing performance testing devices separately simulate the sealing performance of the sealing element under the initial and peak temperature states in the working process, and the high-temperature sealing performance testing devices do not perform the test when three loads of temperature, pressure and compression amount act simultaneously. . However, the performance of the sealing element is influenced by various boundary loads, and the real use environment of the sealing element is also the environment influenced by mutual coupling of multiple loads, so that the separately simulated experimental scheme has certain limitation, and the experimental data has local one-sidedness.
In the research on high-temperature sealing, the Green research center of NASA in the United states has developed several sets of high-temperature sealing performance testing devices, but the high-temperature sealing performance testing devices can only test the sealing performance under a single load or under a plurality of loads. In order to test the leakage amount of the sealing element, the green research center develops a set of room temperature leakage flow device, but the device cannot test the leakage amount under the heat load. In order to test the heat insulation performance and leakage amount of a sealing element under different compression amounts and high temperatures, the Green research center develops a set of control surface sealing test fixture device for an arc gas injection test, high-temperature gas used by the device is combustion gas of oxygen and acetylene, and the heat flow can be adjusted only by adjusting the distance between a nozzle and the sealing element, so that the gas temperature cannot be continuously and accurately controlled; meanwhile, the test bed is not provided with a pressure control device, so that the pressure on the two sides of the sealing element cannot be adjusted; meanwhile, the test bed tests the performance parameters of the sealing element under different compression amounts by adjusting the angle of the control panel, and the accurate compression amount of the sealing element cannot be obtained.
At present, a plurality of high-temperature sealing researches are also carried out domestically, and a plurality of achievements are obtained. In 2013, the Harbin industry university invented a high-temperature structure sealing performance ground simulation test device and test method (CN103207054A), which also used a gas heating device used in an arc jet control surface sealing test fixture device developed by NASA Green research center, the device calibrated the test heat flow density state by a plug calorimeter, and determined the distance between the outlet of the heating device and the surface of a combined structure sealing element and the air inlet flow, so the same problem that the gas temperature and the air flow pressure cannot be accurately controlled exists, and no device for accurately adjusting the compression amount is designed, meanwhile, because no heat insulation measure is adopted in a sealing cavity behind the sealing element, the heat after the cavity is heated by flame is radiated into the sealing cavity through the inner wall surface, and the final test temperature has deviation. Meanwhile, the pressure difference between the front and the back of the sealing element is embodied by measuring the pressure of a pressure cabin connected with the test section, so that the pressure of the sealing element in use can be measured only, and the performance of the sealing element under different pressure differences cannot be tested by accurately controlling the pressure between the front and the back of the sealing element.
With the rapid development of chemical industry, energy industry and aviation industry in China, in order to achieve higher service performance of various devices, the performance of high-temperature sealing is more and more emphasized, and the rapid development of high-temperature sealing research is promoted. The invention provides a wind tunnel device for continuous high-temperature sealing performance test, which is designed for comprehensively researching the heat sealing and air tightness of a sealing element.
The wind tunnel device for the continuous high-temperature sealing performance test can continuously (for a long time) test the heat seal and the air tightness of the sealing element under different temperatures, different compression amounts and different pressure differences. The sealing member is placed in the groove of experimental section, changes the compressive capacity of sealing member through selecting for use the guiding shim of different sizes, installs high temperature thermometer and air flowmeter behind the sealing member. The wind tunnel device for the high-temperature sealing performance testing device can obtain the parameters of the heat seal and the air tightness of the sealing element under the testing condition through the high-temperature thermometer, the high-temperature pressure gauge and the air flow meter before and after sealing.
Disclosure of Invention
The object of the present invention is to test the heat-and gas-tightness against variations in compression, pressure and temperature loads for heat-insulating type seals, gap-filling type seals, laminated sheet type seals and elastomeric seals.
In order to achieve the purpose, the invention designs a continuous wind tunnel device for testing the high-temperature sealing performance, which comprises an air compressor, an air bottle, a normal-temperature pressure gauge, a stop valve a, a pressure reducing valve, an air flow meter a, a pipeline type air heater, a stop valve b, a high-temperature thermometer a, a high-temperature pressure gauge, a test section, an air flow meter b and a high-temperature thermometer b.
The air compressor pressurizes air, and then the pressurized air is stored in the air bottle; a stop valve a is arranged at the outlet of the gas cylinder to control the communication between the gas cylinder and a pipeline, the stop valve a is connected with a pressure reducing valve, and the pressure of air is regulated by regulating the pressure reducing valve; the pressure reducing valve is connected with an air flow meter a, and the air flow meter a is used for measuring the air flow in the pipeline; the air flow meter a is connected with an inlet of the pipeline type air heater, air enters the pipeline type air heater to be heated, an outlet of the pipeline type air heater is connected with an air inlet on the base of the test section, and the heated air enters the test section; two air pipe positive tee joints (9) are arranged on a pipeline connecting the pipeline type air heater and the test section, one air pipe positive tee joint is connected with one side of the stop valve b, and the other air pipe positive tee joint is connected with a high temperature resistance thermometer; the other side of the stop valve b is directly communicated with the atmosphere, and the stop valve b is opened to discharge high-temperature air in the pipeline after a group of tests are finished.
The sealing member is installed in the ditch inslot on the test section base, installs high temperature pressure gauge at the opposite side of the entry of test section base, installs the adjusting shim between test section base and upper cover plate, and parallelly connected has high temperature thermometer b and air flow meter b on the upper cover plate of test section, and the entry of air flow meter b passes through the flange with the air outlet of test section and links to each other, and the export of air flow meter b directly communicates with each other with the atmosphere. By adjusting the pressure reducing valve and the pipeline type air heater and replacing adjusting gaskets with different sizes, the heat tightness and air tightness performance parameters of the sealing element under different compression amounts, different pressure differences and different temperatures can be obtained.
The test section is made of high-temperature-resistant nickel-based alloy, the service temperature is 1200-1300 ℃, the test section is designed to be circular and comprises a base and an upper cover plate; the base is of a concave structure and is provided with three grooves, and the three grooves are a front pressure chamber, a groove for clamping a sealing element and a rear pressure chamber in sequence; the air inlet is arranged on the base and communicated with the front pressure cabin; a hole is formed in the other end of the front pressure chamber connected with the air inlet, and a welding pipeline is arranged at the hole; the width of a groove for clamping the sealing element is 2-12 mm, and the depth of the groove is 1-6 mm; and the rear pressure cabin is filled with high-temperature resistant aerogel. Thirty-six non-penetrating threaded holes with the diameter of 6mm are formed in the periphery of the base, the upper cover plate is assembled with the base, adjusting gaskets with different sizes are designed between the base and the upper cover plate, and the adjusting gaskets not only have the function of adjusting the distance between the base and the upper cover plate, but also have the sealing function; the same size of penetrating screw hole is opened in the same position of upper cover plate and base, respectively opens a diameter 8 mm's penetrating screw hole simultaneously at four angles of upper cover plate, installs jack-up bolt at diameter 8 mm's screw hole when opening the upper cover plate, and rotatory bolt is with the jack-up of upper cover plate. A gap of 0.4-3 mm is reserved between a groove for installing a sealing element on the base and the upper cover plate.
The adjusting gasket is arranged between the base and the upper cover plate, the cross section of the adjusting gasket is hexagonal, the distance between the base and the upper cover plate can be changed by replacing the adjusting gasket, and then the compression amount of the sealing element is changed.
The adjusting gasket is made of 310S high-temperature-resistant stainless steel, the highest service temperature is 1200-1400 ℃, meanwhile, the surface roughness grade of the adjusting gasket is Ra1.6, a sealing effect can be provided, and high-temperature air is prevented from leaking from the side face of the test section.
The pipe type air heater can provide air with ultrahigh temperature at a certain flow rate, and the temperature of the air can be controlled. The heating element of the pipeline type air heater is an electric radiation tube, the heating mode of the electric radiation tube is mainly radiation heat transfer and is assisted by convection heat exchange, an electric heating alloy material used by the electric radiation tube has higher resistivity and high electric heat conversion rate, the material is 0Cr27Al7Mo2, the rated working temperature is 1200 ℃, the surface working temperature can reach 1400 ℃, and the short-time highest working temperature of the electric radiation tube made of the material is 1250 ℃. The radiant tube is arranged in a sleeve, and the sleeve adopts a seamless high-temperature-resistant alloy tube or a coiled tube, a centrifugal cast tube and a special non-metal anti-carburizing sleeve. The inner chamber is equipped with a plurality of baffling boards, and the guide gas flow direction prolongs gaseous residence time at the inner chamber to make gaseous abundant heating, make gaseous heating even, improve heat exchange efficiency.
The electric radiant tube in the pipeline type air heater is in an axial wave-shaped cage cabinet type electric radiant tube, namely a squirrel-cage structure, a resistance wire of a heating element is bent into a U shape and is connected in series into a plurality of insulating high-temperature-resistant ceramic supporting disks, the middle of the resistance wire is fixed by a heat-resistant rod, and the service life of the radiant tube is long.
The control part of the pipeline type air heater adopts a digital display temperature regulator, a solid-state relay and a temperature measuring element to form a measurement, regulation and control loop, the temperature measuring element sends an outlet temperature electric signal of the pipeline type air heater to the digital display temperature regulator for amplification in the electric heating process, the measured temperature value is displayed after comparison, and meanwhile, a signal is output to the input end of the solid-state relay, so that the heater is controlled, and the control cabinet has good control precision and regulation characteristics.
The sealing elements are heat insulation type sealing elements, gap filling type sealing elements, laminated sheet type sealing elements and high-elastic material sealing elements, the section diameter of each sealing element is 2-10 mm, the sealing elements are installed in clamping grooves of the base, and the heat sealing and air tightness performance that the temperature range is from room temperature to 1200 ℃, the pressure range is 0.1 MPa-10 MPa and the compression amount is 10% -30% is measured through a pressure reducing valve, a pipeline type air heater and an adjusting gasket.
The wind tunnel device for the continuous high-temperature sealing performance test is installed in the following sequence:
s1 the air compressor and the cylinder are first welded directly together.
And a normal-temperature pressure gauge and a stop valve a are arranged at the outlet of the S2 gas cylinder, then the stop valve a is connected with a pressure reducing valve through a high-pressure-resistant hose, and the joints are quick joints for air.
The S3 pressure reducing valve is connected with the air flow meter a through a steel pipe, a connector on the side connected with the pressure reducing valve adopts a quick connector for air, a connector on the side connected with the air flow meter a adopts a flange, and gaskets among the flanges adopt graphite wound gaskets.
And S4, connecting the air flow meter a with the air inlet of the pipeline type air heater by using a steel pipe, connecting the joints at the two sides by using flanges, and using metal wound gaskets as gaskets between the flanges.
And an outlet of the S5 pipeline type air heater is connected with an air inlet of the testing section base through a steel pipe, joints on two sides are connected through flanges, and gaskets between the flanges are metal gaskets.
S6, installing two air pipe positive tee joints on a steel pipe connected with the pipeline type air heater and the test section, welding the steel pipe on the first air pipe positive tee joint, installing a stop valve b on the steel pipe, and directly communicating the other side of the stop valve b with the atmosphere; and a high-temperature thermometer a is arranged on the second air pipe tee joint.
S7 high temperature pressure gauge is installed on the other side, opposite to the air inlet, of the testing section base, then the size of the adjusting gasket is selected and installed according to the experimental scheme, then the sealing element is installed in the clamping groove of the base, and then the high temperature resistant aerogel is installed in the rear pressure chamber of the base.
S8 a high temperature thermometer b is arranged on the top of an upper cover plate of the testing section, an air flow meter b is arranged at an air outlet on the upper cover plate, the distance between the air flow meter b and the air outlet is designed to be 400mm according to the installation requirement of the air flow meter b, connectors on two sides are connected through flanges, gaskets between the flanges are metal gaskets, and the other side of the air flow meter b is directly communicated with the atmosphere.
S9 assembling the upper cover plate with the base, and then installing fastening bolts.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can simultaneously realize the experiment of the heat sealing performance and the air sealing performance of sealing at high temperature, the range of the tested differential pressure can reach 0.1-10 Mpa, the range is related to the rated exhaust pressure of the selected air compressor, the rated exhaust pressure of the air compressor can be determined according to the requirement of a test task book, then the model of the air compressor is selected and matched with a pressure reducing valve for use, and the heat sealing performance and the air sealing performance of the sealing element under any constant differential pressure from the atmospheric pressure to the rated exhaust pressure of the air compressor can be measured.
2. The wind tunnel device for the continuous high-temperature sealing performance test can realize the high-temperature sealing performance test within the time range of 3000 seconds or even longer, and the test time is not limited.
3. The invention has wide temperature range which can be tested, the selected pipeline type air heater adopts the radiant tube for heating, the air temperature can be increased to 1200 ℃ at most, the temperature rising and cooling rate of the pipeline type air heater can reach 10 ℃/S, meanwhile, the temperature regulation is fast and stable, the temperature control drift is uncertain because of the leading and lagging phenomena of the controlled air temperature, the invention is suitable for automatic control, and the invention can test the sealing and heat insulation performance within the temperature range of room temperature to 1200 ℃.
4. The invention can stably adjust the compression amount, can obtain the heat-tightness and air-tightness performance of the sealing element under 10-30% of compression amount by replacing the adjusting gaskets with different sizes, and can design the adjusting gasket with smaller thickness change according to the requirement of a test task book, thereby thinning the compression amount.
5. According to the invention, the high-temperature resistant aerogel is designed and installed in the rear pressure chamber of the base, the good heat insulation performance of the high-temperature resistant aerogel enables the temperature of the wall surface to be difficult to be transmitted into the rear pressure chamber, the influence of the temperature on the temperature of outlet air can be effectively reduced, and meanwhile, the aerogel has good gas passing performance and cannot influence the flow measurement of the air.
Drawings
FIG. 1 is a flow chart of an overall installation of a wind tunnel device for a continuous high-temperature sealing performance test;
FIG. 2 is a three-dimensional model diagram of a wind tunnel device for continuous high-temperature sealing performance testing;
FIG. 3 is a cross-sectional view of a test section;
FIG. 4 is a cross-sectional view of the ducted air heater;
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, and the present invention includes a complete set of continuous wind tunnel device for high temperature sealing performance test, but the present invention is not limited to the following examples:
examples
Referring to fig. 1, the continuous wind tunnel device for testing the high-temperature sealing performance comprises a whole set of test and testing system, and can simulate the heat sealing performance and the air sealing performance under various conditions, and the installation process is shown in the figure.
Referring to the attached drawing 2, the wind tunnel device for the continuous high-temperature sealing performance test comprises an air compressor (1), an air bottle (2), a normal-temperature pressure gauge (3), a stop valve a (4), a pressure reducing valve (5), an air flow meter a (6), a pipeline type air heater (7), a stop valve b (10), a high-temperature thermometer a (11), a high-temperature pressure gauge (15), a test section (12), an air flow meter b (14) and a high-temperature thermometer b (13).
As shown in the attached figure 3, the test section comprises a base (24), an air inlet (19), an upper cover plate (23), an air outlet (21), a sealing element (17), an adjusting gasket (16), aerogel (18), a high-temperature thermometer interface (22), a high-temperature pressure gauge interface (20), a front pressure chamber (30) and a rear pressure chamber (31).
As shown in fig. 4, the tube type air heater comprises an air inlet (26), a sleeve (25), an electric radiant tube (27), a baffle plate (28), a control portion (8) and an air outlet (29).
The specific implementation process comprises the following steps: the width of a groove for clamping a sealing element on a designed test section base is 12mm, and the depth of the groove is 6 mm; the cross section of the adjusting gasket is hexagonal, the number of the adjusting gasket is five, and the distances between the upper edge and the lower edge of the hexagon are respectively 10mm, 10.5mm, 11mm, 11.5mm and 12 mm; the seal has cross-sectional dimensions of Φ 10mm x 955 mm. Firstly, closing a stop valve (4) of a gas cylinder, opening an air compressor (1) to pressurize air, then storing the air in the gas cylinder (2), accurately knowing the pressure of the air in the gas cylinder by a normal-temperature pressure gauge (3) arranged at the outlet of the gas cylinder (2), controlling the communication between the gas cylinder and a rear pipeline by arranging the stop valve a (4) behind the normal-temperature pressure gauge (3), then arranging a sealing element (17) in a clamping groove of a test section base (24), arranging high-temperature resistant aerogel (18) in a rear pressure chamber (31), then selecting an adjusting gasket (16) with the height of 12mm according to the compression requirement of a test task book, then assembling the base (24) and an upper cover plate (23), and then arranging a fastening bolt; then the shut-off valve (4) is opened, then the pressure of the air is adjusted by the pressure reducing valve (5), by observing a high temperature pressure gauge (15) mounted on the front pressure chamber (30), when the pressure reaches and stabilizes to the pressure required by the test task book, recording parameters of a high temperature thermometer a (11), a high temperature pressure gauge (15), an air flow meter b (14) and a high temperature thermometer b (13) before and after a seal (17), at which time the compression amount at normal temperature is 10%, heat-tightness and airtightness at a certain pressure difference are measured, then adjusting a pressure reducing valve (5) to change the pressure difference before and after the sealing element (17), recording the parameters of the high temperature thermometer a (11), the high temperature pressure gauge (15), the air flow meter b (14) and the high temperature thermometer b (13) again, the heat sealing and air sealing parameters of the sealing element (17) under different pressure difference conditions with 10% of compression amount at normal temperature can be obtained; then the pipeline type air heater (7) is opened, the control part (8) of the pipeline type air heater is adjusted to enable the temperature to reach the required value of the test task book, and then the pipeline type air heater is matched with the pressure reducing valve (5) for adjustment, so that the heat tightness and air tightness parameters of the sealing element under different pressure difference conditions and different temperature conditions with the compression amount of 10% can be obtained.
After a group of tests are finished, closing the stop valve a (4) and the pipeline type air heater (7), opening the stop valve b (10) to remove high-temperature air remained in the pipeline and the test section (12), after the test section (12) is cooled, detaching the fastening bolt on the test section, installing the jacking bolt on the jacking bolt hole of the upper cover plate, rotating the jacking bolt to separate the upper cover plate (23) from the base (24), replacing the adjusting gasket (16) with 11.5mm, and then obtaining different pressure difference conditions with the compression amount of 15% and heat and air tightness parameters of the sealing element (17) under different temperature conditions according to the installation method with the compression amount of 10% and the operation of the test steps. After a set of tests is completed, the adjusting gasket (16) is replaced again according to the same method, and the heat seal and air seal parameters under the conditions of different pressure differences and different temperatures under the conditions that the compression amount of the sealing element (17) is 10%, 15%, 20%, 25% and 30% can be obtained.

Claims (8)

1. Wind tunnel device is used in test of continuous type high temperature sealing performance, its characterized in that: the device comprises an air compressor, an air bottle, a normal temperature pressure gauge, a stop valve a, a pressure reducing valve, an air flow meter a, a pipeline type air heater, a stop valve b, a high temperature thermometer a, a high temperature pressure gauge, a test section, an air flow meter b and a high temperature thermometer b;
the air compressor pressurizes air, and then the pressurized air is stored in the air bottle; a stop valve a is arranged at the outlet of the gas cylinder to control the communication between the gas cylinder and a pipeline, the stop valve a is connected with a pressure reducing valve, and the pressure of air is regulated by regulating the pressure reducing valve; the pressure reducing valve is connected with an air flow meter a, and the air flow meter a is used for measuring the air flow in the air pipeline; the air flow meter a is connected with an inlet of the pipeline type air heater, air enters the pipeline type air heater to be heated, an outlet of the pipeline type air heater is connected with an air inlet on the base of the test section, and the heated air enters the test section; two air pipe positive tee joints are arranged on a pipeline connecting the pipeline type air heater and the test section, one air pipe positive tee joint is connected with one side of a stop valve b, and the other air pipe positive tee joint is connected with a high-temperature thermometer a; the other side of the stop valve b is directly communicated with the atmosphere, and the stop valve b is opened to discharge high-temperature air in the pipeline after a group of tests are finished;
the sealing element is arranged in a groove on the test section base, the other side opposite to the inlet of the test section base is provided with a high-temperature pressure gauge, an adjusting gasket is arranged between the test section base and the upper cover plate, the upper cover plate of the test section is connected with a high-temperature thermometer b and an air flow meter b in parallel, the inlet of the air flow meter b is connected with the air outlet of the test section through a flange, and the outlet of the air flow meter b is directly communicated with the atmosphere; by adjusting the pressure reducing valve and the pipeline type air heater and replacing adjusting gaskets with different sizes, the parameters of heat tightness and air tightness of the sealing element under different compression amounts, different pressure differences and different temperatures can be obtained;
the test section is made of high-temperature-resistant nickel-based alloy, the service temperature is 1200-1300 ℃, the test section is designed to be circular and comprises a base and an upper cover plate; the base is of a concave structure and is provided with three grooves, and the three grooves are a front pressure chamber, a groove for clamping a sealing element and a rear pressure chamber in sequence; the air inlet is arranged on the base and communicated with the front pressure cabin; the other end of the front pressure cabin, which is connected with the air inlet, is provided with a hole, and a pipeline is welded at the hole; the width of a groove for clamping the sealing element is 2-12 mm, and the depth of the groove is 1-6 mm; the rear pressure cabin is filled with high-temperature resistant aerogel; thirty-six non-penetrating threaded holes with the diameter of 6mm are formed in the periphery of the base, the upper cover plate is assembled with the base, adjusting gaskets with different sizes are designed between the base and the upper cover plate, and the adjusting gaskets not only have the function of adjusting the distance between the base and the upper cover plate, but also have the sealing function; penetrating threaded holes with the same size are formed in the same positions of the upper cover plate and the base, penetrating threaded holes with the diameter of 8mm are formed in four corners of the upper cover plate respectively, a jacking bolt is installed in the threaded holes with the diameter of 8mm when the upper cover plate is opened, and the upper cover plate is jacked up by rotating the jacking bolt; a gap of 0.4-3 mm is reserved between a groove for installing a sealing element on the base and the upper cover plate; the pipe type air heater can provide air with ultrahigh temperature at a certain flow rate, and the temperature of the air can be controlled.
2. The wind tunnel device for the continuous high-temperature sealing performance test according to claim 1, wherein: the adjusting gasket is arranged between the base and the upper cover plate, the cross section of the adjusting gasket is hexagonal, the distance between the base and the upper cover plate can be changed by replacing the adjusting gasket, and then the compression amount of the sealing element is changed.
3. The wind tunnel device for the continuous high-temperature sealing performance test according to claim 2, wherein: the adjusting gasket is made of 310S high-temperature-resistant stainless steel, the highest service temperature is 1200-1400 ℃, meanwhile, the surface roughness grade of the adjusting gasket is Ra1.6, a sealing effect can be provided, and high-temperature air is prevented from leaking from the side face of the test section.
4. The wind tunnel device for the continuous high-temperature sealing performance test according to claim 1, wherein: the heating element of the pipeline type air heater is an electric radiation tube, the heating mode of the electric radiation tube is mainly radiation heat transfer and is assisted by convection heat exchange, an electric heating alloy material used by the electric radiation tube has higher resistivity and high electric heat conversion rate, the material is 0Cr27Al7Mo2, the rated working temperature is 1200 ℃, the surface working temperature can reach 1400 ℃, and the short-time highest working temperature of the electric radiation tube made of the material is 1250 ℃; the radiant tube is arranged in a sleeve, and the sleeve adopts a seamless high-temperature-resistant alloy tube or a coiled tube, a centrifugal cast tube and a special non-metal anti-carburizing sleeve; the inner chamber is equipped with a plurality of baffling boards, and the guide gas flow direction prolongs gaseous residence time at the inner chamber to make gaseous abundant heating, make gaseous heating even, improve heat exchange efficiency.
5. The wind tunnel device for the continuous high-temperature sealing performance test according to claim 1, wherein: the electric radiant tube in the pipeline type air heater is in the shape of an axial corrugated cage type electric radiant tube, a resistance wire of a heating element is bent into a U shape and is connected in a plurality of insulating high-temperature-resistant ceramic supporting disks in series, the middle of the resistance wire is fixed by a heat-resistant rod, and the service life of the radiant tube is long.
6. The wind tunnel device for the continuous high-temperature sealing performance test according to claim 1, wherein: the control part of the pipeline type air heater adopts a digital display temperature regulator, a solid-state relay and a temperature measuring element to form a measuring, regulating and controlling loop, the temperature measuring element sends an outlet temperature electric signal of the pipeline type air heater to the digital display temperature regulator for amplification in the electric heating process, the measured temperature value is displayed after comparison, and meanwhile, a signal is output to the input end of the solid-state relay, so that the heater is controlled, and the control part has good control precision and regulating characteristics.
7. The wind tunnel device for the continuous high-temperature sealing performance test according to claim 1, wherein: the sealing elements are heat insulation type sealing elements, gap filling type sealing elements, laminated sheet type sealing elements and high-elastic material sealing elements, the section diameter of each sealing element is 2-10 mm, the sealing elements are installed in clamping grooves of the base, and the heat sealing and air tightness performance that the temperature range is from room temperature to 1200 ℃, the pressure range is 0.1 MPa-10 MPa and the compression amount is 10% -30% is measured through a pressure reducing valve, a pipeline type air heater and an adjusting gasket.
8. The wind tunnel device for the continuous high-temperature sealing performance test according to claim 1, wherein: the installation sequence of the device is as follows,
s1, firstly, directly welding the air compressor and the air bottle together;
s2, a normal temperature pressure gauge and a stop valve a are installed at the outlet of the gas cylinder, then the stop valve a is connected with a pressure reducing valve through a high pressure resistant hose, and the joints are quick joints for air;
s3, connecting the pressure reducing valve with the air flow meter a through a steel pipe, adopting a quick air connector on the side connected with the pressure reducing valve, adopting a flange on the side connected with the air flow meter a, and adopting a graphite wound gasket as a gasket between the flanges;
s4, connecting the air flow meter a with the air inlet of the pipeline type air heater by using a steel pipe, connecting joints at two sides by using flanges, and using metal wound gaskets as gaskets between the flanges;
s5, connecting the outlet of the pipeline type air heater with the air inlet of the base of the testing section by using a steel pipe, connecting the joints at the two sides by using flanges, and using metal gaskets as gaskets between the flanges;
s6, installing two air pipe positive tee joints on a steel pipe connected with the pipeline type air heater and the test section, welding the steel pipe on the first air pipe positive tee joint, installing a stop valve b on the steel pipe, and directly communicating the other side of the stop valve b with the atmosphere; a high-temperature thermometer a is arranged on the second air pipe tee;
s7, installing a high-temperature pressure gauge on the other side, opposite to the air inlet, of the base of the testing section, selecting the size of an installation adjusting gasket according to an experimental scheme, then installing a sealing element in a clamping groove of the base, and then installing high-temperature-resistant aerogel in a rear pressure chamber of the base;
s8, installing a high-temperature thermometer b at the top of an upper cover plate of the testing section, installing an air flow meter b at an air outlet on the upper cover plate, designing the distance between the air flow meter b and the air outlet to be 400mm according to the installation requirement of the air flow meter b, connecting joints at two sides by using flanges, using metal gaskets as gaskets between the flanges, and directly communicating the other side of the air flow meter b with the atmosphere;
s9 assembling the upper cover plate with the base, and then installing fastening bolts.
CN201711488687.8A 2017-12-30 2017-12-30 Wind tunnel device for continuous high-temperature sealing performance test Active CN108254130B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711488687.8A CN108254130B (en) 2017-12-30 2017-12-30 Wind tunnel device for continuous high-temperature sealing performance test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711488687.8A CN108254130B (en) 2017-12-30 2017-12-30 Wind tunnel device for continuous high-temperature sealing performance test

Publications (2)

Publication Number Publication Date
CN108254130A CN108254130A (en) 2018-07-06
CN108254130B true CN108254130B (en) 2020-09-22

Family

ID=62725246

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711488687.8A Active CN108254130B (en) 2017-12-30 2017-12-30 Wind tunnel device for continuous high-temperature sealing performance test

Country Status (1)

Country Link
CN (1) CN108254130B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109613304A (en) * 2019-01-21 2019-04-12 北京卫星环境工程研究所 The low pressure wind speed calibration system of open circulation wind-tunnel
CN110207906B (en) * 2019-05-31 2021-04-13 中国航天空气动力技术研究院 Variable-parameter electric arc heater track test water leakage diagnosis system
CN110411701A (en) * 2019-06-21 2019-11-05 中国人民解放军国防科技大学 Nuclear power hypersonic wind tunnel

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101769815A (en) * 2009-10-27 2010-07-07 海洋王照明科技股份有限公司 Testing device for plane sealing performance
CN101793585A (en) * 2010-04-04 2010-08-04 苏州宝骅机械技术有限公司 Device and method for detecting sealing property of sealing element
CN101799349A (en) * 2010-04-07 2010-08-11 苏州宝骅机械技术有限公司 Device and method for detecting sealing property of sealing component
CN101968395A (en) * 2010-09-30 2011-02-09 江苏南方机电股份有限公司 Spring frame mechanism of equipment for detecting shell air tightness
CN102445310A (en) * 2011-09-22 2012-05-09 航天材料及工艺研究所 Simple high-temperature testing device and method for flange rubber sealing element
CN102661836A (en) * 2012-05-18 2012-09-12 西南石油大学 Method and device for detecting sealing performance and corrosion performance of rubber under pressure state
CN202648938U (en) * 2012-07-17 2013-01-02 浙江石化阀门有限公司 Thermal state sealing test device of super high temperature hot valve
CN103207054A (en) * 2013-04-25 2013-07-17 哈尔滨工业大学 High temperature structure sealing performance ground-based simulation testing device and method
CN103728105A (en) * 2013-12-31 2014-04-16 苏州宝骅机械技术有限公司 Quantitative leak detection device of pressure system
CN104359635A (en) * 2014-11-24 2015-02-18 中国航空动力机械研究所 Multifunctional all-working-condition metal elastic sealing ring testing device
CN204740107U (en) * 2015-03-26 2015-11-04 自贡市佳世特密封制品有限公司 O type sealing washer leak rate detection device
CN105387974A (en) * 2015-11-30 2016-03-09 天鼎联创密封技术(北京)有限公司 Test device and test method for seal ring
CN107064206A (en) * 2016-12-29 2017-08-18 盘锦辽河油田金环实业有限责任公司 A kind of elevated-temperature seal section heat insulating property test device
CN107271134A (en) * 2017-06-28 2017-10-20 中国空气动力研究与发展中心低速空气动力研究所 A kind of icing wind tunnel hot air anti-icing tests high-precision analog method and apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182158A (en) * 1978-08-17 1980-01-08 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Static pressure orifice system testing method and apparatus
FR2852654B1 (en) * 2003-03-20 2005-05-06 Device and method for relative and controlled sealing between a conduit and a ceramic tube
CN103712645A (en) * 2013-12-31 2014-04-09 德州宇力液压有限公司 Sealing element testing equipment
CN106246617B (en) * 2016-08-24 2018-05-04 浙江工业大学 The high-performance combined seal ring Performance Test System of reciprocating machine
KR101703840B1 (en) * 2016-09-27 2017-02-07 국방과학연구소 Performance and reliability test apparatus for pyrotechnic mechanical device under high gas pressure

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101769815A (en) * 2009-10-27 2010-07-07 海洋王照明科技股份有限公司 Testing device for plane sealing performance
CN101793585A (en) * 2010-04-04 2010-08-04 苏州宝骅机械技术有限公司 Device and method for detecting sealing property of sealing element
CN101799349A (en) * 2010-04-07 2010-08-11 苏州宝骅机械技术有限公司 Device and method for detecting sealing property of sealing component
CN101968395A (en) * 2010-09-30 2011-02-09 江苏南方机电股份有限公司 Spring frame mechanism of equipment for detecting shell air tightness
CN102445310A (en) * 2011-09-22 2012-05-09 航天材料及工艺研究所 Simple high-temperature testing device and method for flange rubber sealing element
CN102661836A (en) * 2012-05-18 2012-09-12 西南石油大学 Method and device for detecting sealing performance and corrosion performance of rubber under pressure state
CN202648938U (en) * 2012-07-17 2013-01-02 浙江石化阀门有限公司 Thermal state sealing test device of super high temperature hot valve
CN103207054A (en) * 2013-04-25 2013-07-17 哈尔滨工业大学 High temperature structure sealing performance ground-based simulation testing device and method
CN103728105A (en) * 2013-12-31 2014-04-16 苏州宝骅机械技术有限公司 Quantitative leak detection device of pressure system
CN104359635A (en) * 2014-11-24 2015-02-18 中国航空动力机械研究所 Multifunctional all-working-condition metal elastic sealing ring testing device
CN204740107U (en) * 2015-03-26 2015-11-04 自贡市佳世特密封制品有限公司 O type sealing washer leak rate detection device
CN105387974A (en) * 2015-11-30 2016-03-09 天鼎联创密封技术(北京)有限公司 Test device and test method for seal ring
CN107064206A (en) * 2016-12-29 2017-08-18 盘锦辽河油田金环实业有限责任公司 A kind of elevated-temperature seal section heat insulating property test device
CN107271134A (en) * 2017-06-28 2017-10-20 中国空气动力研究与发展中心低速空气动力研究所 A kind of icing wind tunnel hot air anti-icing tests high-precision analog method and apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
美国高温密封试验技术研究;张婕 等;《液压气动与密封》;20151031(第10(2015)期);第9页第5节 *

Also Published As

Publication number Publication date
CN108254130A (en) 2018-07-06

Similar Documents

Publication Publication Date Title
US7506555B2 (en) Process and apparatus for testing a material under a high temperature and pressure environment
CN102809581B (en) Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection
US10415897B2 (en) Monolithic tube-in matrix heat exchanger
CN106595759B (en) A kind of cryogenic propellant storing technology ground system test
CN104330519B (en) A kind of particle pneumatic floating laser ignition experimental provision
CN105300807B (en) A kind of high temperature true triaxial Rock experiment machine
EP2691757A1 (en) Apparatus and process for testing an industrial gas turbine engine and components thereof
US9932903B2 (en) Fuel manifold and fuel injector arrangement
CN102229361A (en) Tester for aerodynamic heating structure
CN101393071B (en) Visual observation and transient measurement method and apparatus for cooling process of turbine blade
CN103592132B (en) Gas-turbine combustion chamber pressurizes visual corrosion chamber
CN104833768B (en) The analog of rocket engine endoparticle phase sedimentary condition lower thermal insulating layer ablation
CN102432015B (en) Uniform temperature type efficient electric heating furnace
CN201681029U (en) Testing device for simulating and testing failure of heat fatigue of high-temperature parts in real time
EP2965011B1 (en) Combustor apparatus for a gas turbine engines
KR101203526B1 (en) Performance test facilities of heat exchanger for High Temperature and Pressure
CN104713731B (en) A kind of aero-turbine active clearance controls casing model confirmatory experiment platform
CN106370388B (en) Car radiation Performance Test System and method
CN204314032U (en) High-temperature pipe flange compactedness test macro
JP2012052531A (en) Detection and measuring method, and device
CN102288497B (en) Heating device for Hopkinson pressure bar test
CN108195706B (en) A kind of thermal fatigue test system of ceramic matrix composite material structure part
CN102667360A (en) A dual wall axial flow electric heater for leak sensitive applications
Huang et al. Transpiration cooling for additive manufactured porous plates with partition walls
CN105548519B (en) Underground coal fire evolutionary process analog simulation experimental rig and method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant