CN110987447A - Large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system - Google Patents
Large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system Download PDFInfo
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- CN110987447A CN110987447A CN201911366592.8A CN201911366592A CN110987447A CN 110987447 A CN110987447 A CN 110987447A CN 201911366592 A CN201911366592 A CN 201911366592A CN 110987447 A CN110987447 A CN 110987447A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system. The constant volume bomb comprises a constant volume bomb body, an air inlet and exhaust system, an oil supply system, an optical test system and a data acquisition and control system; the constant volume bomb body comprises a top cover, a lifting lug, an oil sprayer mounting seat, a bomb body, a visual window, a ceramic fiber heat insulation layer, an electric heating wire and a bottom cover; the air inlet and exhaust system comprises a high-pressure air bottle, an air inlet electromagnetic valve, a one-way valve, a safety valve, an exhaust ball valve, a cooler and an electric actuating mechanism; the oil supply system comprises a high-pressure common rail and an oil pump test bed; the oil pump test bed comprises a fuel tank, an oil tank, an electric cabinet, an air cooler, a high-power motor and a high-pressure oil pump; the optical test system comprises a xenon lamp, a convex lens, a slit, a first concave mirror, a second concave mirror, a knife edge and a high-speed camera. The invention can conveniently carry out spraying and burning experiments of various fuel oils under the large cylinder diameter scale of the ship, lightens the working strength of experimenters and guarantees the personal safety of the experimenters.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to a large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system.
Background
The quality of fuel atomization of an internal combustion engine directly influences the subsequent combustion and discharge processes, so that the deep research on the fuel atomization process is a necessary premise for designing and developing a novel internal combustion engine, and a constant volume bomb is an effective experimental device for researching fuel atomization and combustion. The international popular constant volume bomb at present can be divided into three types: the precombustion chamber constant volume bomb is internally provided with a heating type constant volume bomb and a constant flow type constant volume bomb. The pre-combustion chamber constant volume bomb is characterized in that a certain amount of combustible mixed gas is filled in the constant volume bomb in advance and is ignited by a spark plug, so that the high-temperature and high-pressure environment can be instantly achieved in the constant volume bomb. However, such a constant volume bomb cannot maintain a stable high-temperature and high-pressure environment for a long time, and its internal space is generally small in order to generate high pressure by burning a small amount of combustible mixture, and thus it is not suitable for spray research of a marine large-bore internal combustion engine. The built-in heating type constant volume bomb is characterized in that an electric heating wire is arranged in the constant volume bomb to increase the temperature of the constant volume bomb. Because the heating wire needs to be placed, the internal space of the constant volume bomb is generally very large, and the constant volume bomb is suitable for the spraying research of large oil injection quantity of a marine internal combustion engine. In addition, the constant volume bomb can maintain a stable high-temperature and high-pressure environment for a long time, and has higher requirement on the strength of the body. The constant-flow constant-volume bomb is provided with a high-power electric heating wire in an air inlet pipeline, and the ambient air is heated to a high temperature in the air inlet process. In addition, the air is exhausted at a certain speed while air is introduced, and when the air is introduced and exhausted to reach balance, the internal pressure of the constant volume bomb can be kept constant. Because the gas is continuously fed and discharged, the constant-flow constant-volume bomb needs to consume a large amount of gas when in use, and the whole system of the constant-volume bomb is complex and has high manufacturing cost.
At present, domestic patents related to constant volume bombs are mainly precombustion type constant volume bombs. Chinese patent CN 106353098A discloses a pre-burning type constant volume bomb, the constant volume bomb body adopts a round cake shape structure, and two sides of the round cake are provided with visual windows. Chinese patent CN 103926196 a discloses a spherical multifunctional constant volume bomb, which is shaped like a sphere and has more than two visual windows, the structure of the bomb is simple, six visual windows are provided, the test light path can be flexibly arranged, but it is difficult to meet the high pressure requirement of the experiment. The above patent only describes the constant volume bomb body, and does not include other important related systems (air intake and exhaust system, fuel supply system and control system) of the constant volume bomb system. How to invent a large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system is a problem to be solved urgently by people in the technical field at present.
Therefore, the technical personnel in the field are dedicated to developing a large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system, so that the working strength of experimenters is reduced, and the personal safety of the experimenters is guaranteed.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the invention is to develop an experimental device for spraying research on large fuel injection quantity of an internal combustion engine, and the problem to be solved is to develop a large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system, so that the working strength of experimenters is reduced, and the personal safety of the experimenters is guaranteed.
In order to achieve the purpose, the invention provides a large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system which comprises a constant-volume bomb body, an air inlet and exhaust system, an oil supply system, an optical test system and a data acquisition and control system, wherein the constant-volume bomb body is provided with a gas inlet and exhaust system; the constant volume bomb body comprises a top cover, a lifting lug, an oil sprayer mounting seat, a bomb body, a visual window, a ceramic fiber heat insulation layer, an electric heating wire and a bottom cover; the air inlet and exhaust system comprises a high-pressure air bottle, an air inlet electromagnetic valve, a one-way valve, a safety valve, an exhaust ball valve, a cooler and an electric actuating mechanism; the oil supply system comprises a high-pressure common rail and an oil pump test bed; the oil pump test bed comprises a fuel tank, an oil tank, an electric cabinet, an air cooler, a high-power motor and a high-pressure oil pump; the optical test system comprises a xenon lamp, a convex lens, a slit, a first concave mirror, a second concave mirror, a knife edge and a high-speed camera; the data acquisition and control system comprises a data acquisition card and an upper computer.
Further, the projectile body is of a cylindrical structure; the projectile body is connected with the top cover and the bottom cover through bolts; the lateral surface of the projectile body is provided with three visualization windows and a lateral end cover; the side end cover is provided with an air inlet hole, a temperature and pressure sensor mounting hole and a power supply electrode mounting hole of an electric heating wire.
Furthermore, the upper surface and the lower surface of the bullet body are provided with circular ring-shaped grooves for placing metal graphite winding gaskets.
Furthermore, four lifting lugs are mounted on the top cover.
Furthermore, the bottom cover is provided with an exhaust hole of the constant volume bomb body.
Further, the heating wire is installed at the bottom of the constant volume bomb body, and the heating wire is spirally installed in the ceramic ring.
Further, the oil injector is mounted on the top cover through the oil injector mounting seat; and a cooling water channel is arranged on the oil sprayer mounting seat.
Further, the visualization window comprises quartz glass and a sealing ring; the quartz glass is installed in a non-tightening mode, and is directly placed inside the visualization window; the outer side end face of the quartz glass is provided with the sealing ring; the sealing ring is a metal graphite wound gasket.
Furthermore, the high-pressure common rail is connected with the oil injector, and the high-power motor drives the high-pressure oil pump to rotate so as to convey high-pressure fuel oil to the high-pressure common rail.
Further, the constant volume bomb system collects temperature and pressure data signals by using a sensor and the data acquisition card; the temperature sensor is a probe type thermocouple.
Furthermore, a cooling water channel is arranged on the oil sprayer mounting seat and used for cooling the oil spray nozzle so as to ensure that the temperature of fuel oil in the oil spray nozzle is constant.
Furthermore, the electrode for supplying power to the electric heating wire is formed by an unobstructed spark plug extension center electrode, and the extension center electrode is made of a nickel rod.
Further, the diameter of the exhaust pipe is larger than that of the air inlet pipe; the electric actuator is used for controlling the opening and closing of the high-temperature high-pressure ball valve; the cooler is used for cooling the high-temperature exhaust gas to the ambient temperature to prevent the experimenters from being burnt by the high-temperature gas.
Furthermore, the constant volume bomb system collects the temperature and the pressure in the constant volume bomb by using a data acquisition card, the data acquisition card is connected with an upper computer, the collected temperature and pressure signals are transmitted to the upper computer, and the temperature and the pressure in the constant volume bomb are displayed on the upper computer in real time. The upper computer can send different instructions to the data acquisition card to enable the data acquisition card to output different electric signals to control the opening and closing of the air inlet and outlet electromagnetic valve, the opening and closing of the electric actuating mechanism of the air outlet valve and trigger the high-speed camera. In addition, the upper computer is also connected with an electric cabinet of the oil pump test bed. The rail pressure signal and the fuel temperature signal collected by the electric cabinet can be transmitted to the upper computer, and the rail pressure and fuel temperature information is displayed on the upper computer in real time. The host computer can send the instruction to the electric cabinet, lets the electric cabinet control rail pressure, oil spout pulse width, jet number of times and jet interval.
In the preferred embodiment of the invention, compared with the prior art, the air intake and exhaust process, the fuel supply process and the camera triggering process are all completed through electric control, so that the working intensity of experimenters is greatly reduced. Utilize data acquisition card to gather temperature and pressure in the constant volume bullet to whole spraying test process all accessible host computer is accomplished, can keep apart other parts of host computer and constant volume bullet system, and the experimenter need not closely to contact the highly compressed constant volume bullet body of high temperature, and this guarantee experimenter's personal safety that can be fine. The system can conveniently carry out spraying and combustion experiments of various fuel oils under the large-bore scale of the ship.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic structural diagram of a large-bore optical high-temperature high-pressure constant-volume bomb system according to a preferred embodiment of the invention;
FIG. 2 is a cross-sectional view of a constant volume bomb body in accordance with a preferred embodiment of the present invention;
FIG. 3 is a three-dimensional view of a constant volume elastomeric body in accordance with a preferred embodiment of the present invention;
FIG. 4 is a cross-sectional view of a visualization window of a preferred embodiment of the present invention;
FIG. 5 is a schematic view of a fuel injector mount according to a preferred embodiment of the invention;
FIG. 6 is a schematic structural diagram of an oil pump test stand according to a preferred embodiment of the present invention;
FIG. 7 is a flow chart of a data acquisition and control system in accordance with a preferred embodiment of the present invention;
wherein, 1-constant volume bomb body, 11-top cover, 12-lifting lug, 13-oil injector, 14-oil injector mounting seat, 141-cooling water inlet, 142-cooling water outlet, 15-bomb body, 16-visual window, 161-quartz glass, 162-sealing ring, 17-ceramic fiber heat preservation layer, 18-electric heating wire, 19-bottom cover, 2-air inlet and exhaust system, 21-high pressure gas cylinder, 22-air inlet electromagnetic valve, 23-one-way valve, 24-safety valve, 25-air exhaust ball valve, 26-cooler, 27-electric actuator, 3-oil supply system, 31-high pressure common rail, 32-oil pump test bench, 321-fuel tank, 322-oil tank, 323-electric control tank, 324-air cooler, 325-a high-power motor, 326-a high-pressure oil pump, 4-an optical test system, 41-a xenon lamp, 42-a convex lens, 43-a slit, 44-a first concave mirror, 45-a second concave mirror, 46-a knife edge, 47-a high-speed camera, 5-a data acquisition and control system, 51-a data acquisition card and 52-an upper computer.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1, the invention provides a large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system. The constant volume bomb comprises a constant volume bomb body 1, an air inlet and exhaust system 2, an oil supply system 3, an optical test system 4 and a data acquisition and control system 5.
The optical path in fig. 1 is a classical "zigzag" schlieren optical path. First, light emitted from the xenon lamp 41 is converged by the convex lens 42 and passes through the slit 43, the slit 43 is located at the focus of the convex lens 42, and the light from the slit 43 passes through the first concave mirror 44 to form a beam of parallel light. The parallel light beam enters from one visualization window 16 of the constant volume bomb body 1 and is emitted from the other visualization window 16, then passes through the second concave mirror 45, the knife edge 46 and finally enters the high-speed camera 47. The schlieren method adopts parallel light to pass through the spraying test area, so that the flowing condition of the spraying gas phase can be reflected.
As shown in fig. 1, fig. 2 and fig. 6, the whole one-time complete working process of the constant volume bomb system comprises the following steps:
step one, arranging schlieren optical path according to the position shown in figure 1.
And step two, setting the target pressure of the constant volume bomb in the upper computer 52, then sending an instruction to the data acquisition card 51, and outputting an electric signal by the data acquisition card 51 to open the air inlet electromagnetic valve 22. The gas in the high-pressure gas cylinder 21 enters the constant volume bomb body 1 through a pressure reducing valve, an air inlet electromagnetic valve 22 and a one-way valve 23. In the process, the data acquisition card 51 continuously acquires the temperature and pressure signals inside the constant volume bomb body 1 and transmits the signals to the upper computer 52, and the upper computer 52 displays the temperature and pressure inside the constant volume bomb body in real time. When the pressure in the constant volume bomb body 1 reaches the set target pressure, the upper computer 52 automatically sends an instruction for closing the air inlet electromagnetic valve 22 to the data acquisition card 51, the air inlet electromagnetic valve 22 is closed, and air inlet is finished.
And step three, the upper computer 52 controls the data acquisition card 51 to turn on the power supply of the heating wire 18 in the constant volume bomb body 1, the heating wire 18 starts to work, and the temperature in the constant volume bomb body starts to rise. When the temperature in the constant volume bomb body reaches the target temperature, the temperature in the constant volume bomb body 1 can be maintained to be constant through PID adjustment.
And step four, setting target rail pressure, oil injection pulse width, oil injection interval and oil injection frequency in the upper computer 52. Then, the upper computer 52 sends an operation starting instruction to the electric control box 323 of the oil pump test bed 32, and the oil pump test bed 32 starts to operate. The rail pressure collected by the oil pump test bed 32 is transmitted to the upper computer 52, and the upper computer 52 displays the rail pressure in real time. When the rail pressure reaches the target value, the rail pressure is maintained constant.
And step five, the upper computer 52 sends a camera triggering instruction to the data acquisition card 51, and the data acquisition card 51 outputs an electric signal to trigger the high-speed camera 47 to start working. At the same time, the upper computer 52 sends an instruction to start oil injection to the electric control box 323 of the oil pump test stand 32, and the oil injector 13 starts oil injection in the manner set in the upper computer 52. The high speed camera 47 records the entire process of spraying oil and transmits the spray image to the upper computer 52.
And sixthly, the upper computer 52 sends an instruction for opening the exhaust valve electric actuating mechanism to the data acquisition card 51, and the data acquisition card 51 outputs an electric signal to enable the electric actuating mechanism 27 to start working. The electric actuator 27 rotates the exhaust ball valve 25, and the exhaust ball valve 25 is opened. The high-temperature and high-pressure gas in the constant volume bomb body 1 is discharged through the exhaust ball valve 25 and the cooler 26. When the gas pressure in the constant volume bomb body 1 is reduced to the environmental pressure, the upper computer 52 sends an instruction for closing the exhaust valve to the data acquisition card 51, the data acquisition card 51 outputs an electric signal to close the electric actuator 27, and the exhaust ball valve 25 is closed.
As shown in fig. 2 and 3, the constant volume bomb body mainly comprises a top cover 11, a lifting lug 12, an oil injector 13, an oil injector mounting seat 14, a bomb body 15, a visualization window 16, a ceramic fiber insulating layer 17, a heating wire 18 and a bottom cover 19. The projectile body 15 adopts a cylindrical structure, and the upper part and the lower part of the projectile body are respectively connected with the top cover 11 and the bottom cover 19 through bolts. Sealing elements among all parts of the constant volume bomb body 1 are all made of high-temperature-resistant metal graphite wound gaskets. The upper surface and the lower surface of the elastomer 15 are provided with circular ring-shaped grooves for placing metal graphite winding gaskets. The metal graphite wound gasket has excellent high temperature resistance and can be used for sealing among various components of the constant volume bomb body 1. Four lifting lugs 12 are arranged on the top cover 11, so that the constant volume bomb body 1 can be conveniently lifted. On the lateral surface of the projectile body 15 there are three visualization windows 16 and a lateral end cap. The side end cover is provided with an air inlet hole, a temperature and pressure sensor mounting hole and a power supply electrode mounting hole of the electric heating wire 18.
The air inlet and the air outlet of the constant volume bomb body 1 are respectively positioned on the side end cover and the bottom cover 19 of the constant volume bomb body 1. In order to accelerate the exhaust speed, the diameter of the exhaust pipe is larger than that of the air inlet pipe. The air inlet system is composed of a high-pressure air bottle 21, an air inlet electromagnetic valve 22 and a one-way valve 23. In the air inlet process, the gas in the high-pressure gas bottle 21 enters the pressure reducing valve, the pressure of the gas is reduced to a certain value, and then the gas enters the inside of the constant volume bomb body 1 through the air inlet electromagnetic valve 22 and the one-way valve 23. The check valve 23 is to prevent reverse flow of gas. The exhaust system is composed of a safety valve 24, an exhaust ball valve 25, a cooler 26 and an electric actuator 27. The safety valve 24 can be automatically opened when the internal pressure of the constant volume bomb body 1 exceeds a set value, so that the safety of the experiment is guaranteed. The electric actuator 27 is for opening or closing the exhaust ball valve 25. The valve for exhaust needs to be resistant to high temperature and high pressure, and if an electromagnetic valve which is resistant to high temperature and high pressure is selected, the valve is very expensive, so that the exhaust ball valve 25 which is relatively low in price is used, and the rotation of the exhaust ball valve 25 is controlled by an electric actuator 27 to achieve the same effect as that of the electromagnetic valve. The cooler 26 is connected in series to the exhaust pipe and is used for cooling the high-temperature exhaust gas of the constant volume bomb body 1 to the ambient temperature and then exhausting the high-temperature exhaust gas to the atmosphere so as to prevent the experimenters from being burnt by the high-temperature exhaust gas.
As shown in fig. 2 and 5, the injector 13 is mounted on the head cover 11 via an injector mount 14. Different types of injectors 13 can be used on the constant volume bomb body 1 by replacing the injector mount 14. The injector mounting base 14 is provided with a cooling water channel, cooling water enters from a cooling water inlet 141 of the injector mounting base 14, cools the injector nozzle and exits from a cooling water outlet 142, so that the temperature of fuel in the injector nozzle is constant in the test process. FIG. 5 shows a detailed configuration of a fuel injector mount cooling gallery.
As shown in fig. 2 and 4, the quartz glass 161 in the visualization window 16 is installed in a non-clamping manner, that is, the quartz glass 161 is directly placed inside the visualization window 16, a sealing ring is not placed on the end surface close to one side inside the constant volume bomb body 1, a sealing ring 162 is placed on the end surface of the outer side, and the sealing ring 162 is a metal graphite wound gasket. When the constant volume bomb body 1 is not filled with gas, the gas pressure in the constant volume bomb body 1 is equal to the ambient pressure, and the quartz glass 161 is not pressurized; when the constant volume bomb body 1 is filled with gas with a certain pressure, the gas pressure in the constant volume bomb body 1 is greater than the environmental pressure, at this time, the quartz glass 161 can be tightly attached to the sealing ring 162 on the outer end surface of the quartz glass to achieve the sealing effect, and the sealing effect is better as the gas pressure in the constant volume bomb body 1 is higher. The quartz glass of the constant volume bomb body in the prior art is installed in a clamping mode, namely two end faces of the quartz glass are clamped tightly by bolts. Since the quartz glass is brittle, the quartz glass is easily crushed during the process of tightening the bolt by means of a clamping type mounting method. In addition, in order to reduce the risk of crushing the quartz glass, the sealing ring adopted in the clamping type installation mode is generally a flexible gasket (an O-ring, a teflon gasket and the like), but the flexible gasket is not high in temperature resistance, so that the visual window must be cooled by cooling water to prevent the sealing ring from melting at high temperature. According to the invention, the quartz glass 161 is installed in a non-clamping manner, and a flexible gasket which is not high in temperature resistance is not used in the non-clamping manner, so that the visual window 16 does not need to be cooled by cooling water, and the complexity of the structure of the constant volume elastic visual window 16 is reduced.
As shown in fig. 2, a high-power heating wire 18 is installed at the bottom of the constant volume bomb body 1, and ceramic fiber heat-insulating layers 17 for heat insulation are installed at the bottom and around the heating wire 18 to slow down heat dissipation in the constant volume bomb body 1. The heating wire 18 is spirally arranged in the ceramic ring, and the two electrodes are arranged on the wall surface of the constant volume bomb body 1 and used for supplying power to the heating wire 18, but the internal temperature and pressure of the constant volume bomb body 1 are too high, so that the common electrode can not meet the requirements easily, and the central electrode of the spark plug is prolonged to be used as a power supply electrode. The selected spark plug is an unobstructed spark plug, and the extended electrode material is a nickel rod. The electric heating wire 18 is connected with the electrode through a copper nose. The ceramic fiber heat-insulating material can not generate carcinogenic substances when being heated, so that the personal safety of experimenters is guaranteed.
As shown in fig. 6 and 1, the oil supply system 3 includes a high-pressure common rail 31 and an oil pump test stand 32. The oil pump test bed 32 comprises a fuel tank 321, an oil tank 322, an electric control box 323, an air cooler 324, a high-power motor 325 and a high-pressure oil pump 326. When the upper computer 52 sends an operation instruction to the electric cabinet 323, the electric cabinet 323 can control the high-power motor 325 to rotate, and the high-power motor 325 is connected with the high-pressure oil pump 326 through a shaft, so that the high-power motor 325 can drive the high-pressure oil pump 326 to rotate, and the pressure of fuel in the fuel tank 321 rises after passing through the high-pressure oil pump 326, and then the fuel enters the high-pressure common rail 31 through a high-pressure oil pipe. One end of the high-pressure common rail 31 is fed with oil, and the other end of the high-pressure common rail 31 is discharged with oil, so that the oil pressure in the high-pressure common rail 31 can be kept constant when the oil feeding and discharging are balanced. When the high-power motor 325 stops rotating, the oil outlet valve of the high-pressure common rail 31 is fully opened, and the oil pressure in the oil outlet valve is instantly released to zero, so that the safety of the experiment is improved. The electric cabinet 323 is used for collecting rail pressure and fuel temperature, controlling the rotating speed of the motor and controlling the injection of the oil injector. The electric cabinet 323 is connected with the upper computer 52 through serial port communication. The air cooler 324 is used to cool the high power motor 325.
As shown in fig. 7, a flow chart of the data acquisition and control system. The upper computer 52 is connected with the data acquisition card 51, and the data acquisition card 51 continuously acquires the temperature and the pressure inside the constant volume bomb body 1 and transmits the temperature and the pressure to the upper computer 52. The upper computer 52 can send corresponding instructions to the data acquisition card 51 to control the data acquisition card 51 to output corresponding electric signals to control the opening and closing of the air inlet electromagnetic valve 22 and the exhaust ball valve 25, control the opening and closing of the exhaust valve electric actuator 27 and trigger the high-speed camera 47. In addition, the upper computer 52 is also connected with an electric control box 323 of the oil pump test bed 32. The electric control box 323 of the oil pump test bed 32 collects the rail pressure signal and the fuel temperature signal and transmits the signals to the upper computer 52, and the rail pressure and the fuel temperature are displayed on the upper computer 52 in real time. And the upper computer 52 can send different instructions to the electric control box 323 so as to control the rail pressure, the oil injection pulse width, the oil injection frequency and the oil injection interval.
As shown in fig. 3, the constant volume bomb body 1 has three visual windows on the side surface, which is convenient for arranging various test light paths. Such as: direct photography, schlieren, planar laser induced fluorescence, etc.
The invention uses a sensor and a data acquisition card 1 to acquire temperature and pressure data signals inside a constant volume bomb body 1. The temperature sensor adopts a probe type thermocouple, and a temperature measuring point is close to the spraying area so as to reflect the real environment temperature of the area where the spraying is located. The data acquisition card 51 is connected to the upper computer 52, so that the temperature and pressure signals acquired by the data acquisition card 51 can be transmitted to the upper computer 52 and displayed on the upper computer 52. In addition, the upper computer 52 can send a corresponding instruction to the data acquisition card 51 to trigger the data acquisition card 51 to output a corresponding electric signal to control the opening and closing of the air inlet electromagnetic valve 22, control the electric actuator 27 of the exhaust valve to start working and trigger the high-speed camera 47.
The air intake and exhaust process, the fuel supply process and the camera triggering process are all completed through electric control, so that the working intensity of experimenters is greatly reduced. And whole spraying test process all can be accomplished through host computer 52, so can keep apart host computer 52 and other parts of constant volume bullet system, the experimenter need not closely contact high temperature highly compressed constant volume bullet body 1, this guarantee experimenter's personal safety that can be fine.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system is characterized by comprising a constant-volume bomb body, an air inlet and exhaust system, an oil supply system, an optical test system and a data acquisition and control system; wherein the content of the first and second substances,
the constant volume bomb body comprises a top cover, a lifting lug, an oil sprayer mounting seat, a bomb body, a visual window, a ceramic fiber heat insulation layer, an electric heating wire and a bottom cover;
the air inlet and exhaust system comprises a high-pressure air bottle, an air inlet electromagnetic valve, a one-way valve, a safety valve, an exhaust ball valve, a cooler and an electric actuating mechanism;
the oil supply system comprises a high-pressure common rail and an oil pump test bed; the oil pump test bed comprises a fuel tank, an oil tank, an electric cabinet, an air cooler, a high-power motor and a high-pressure oil pump;
the optical test system comprises a xenon lamp, a convex lens, a slit, a first concave mirror, a second concave mirror, a knife edge and a high-speed camera;
the data acquisition and control system comprises a data acquisition card and an upper computer.
2. The large-bore optical high-temperature high-pressure constant-volume bomb system of claim 1, wherein the bomb body is of a cylindrical structure; the projectile body is connected with the top cover and the bottom cover through bolts; the lateral surface of the projectile body is provided with three visualization windows and a lateral end cover; the side end cover is provided with an air inlet hole, a temperature and pressure sensor mounting hole and a power supply electrode mounting hole of the electric heating wire.
3. The large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system of claim 2, wherein the upper surface and the lower surface of the bomb body are provided with circular ring-shaped grooves for placing a metal graphite winding gasket.
4. The large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system of claim 1, wherein four lifting lugs are mounted on the top cover.
5. The large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system of claim 1, wherein the bottom cover is provided with an exhaust hole of the constant-volume bomb body.
6. The large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system of claim 1, wherein the heating wire is installed at the bottom of the constant-volume bomb body, and the heating wire is spirally installed in the ceramic ring.
7. The large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system of claim 1, wherein the fuel injector is mounted on the top cover through the fuel injector mounting seat; and a cooling water channel is arranged on the oil sprayer mounting seat.
8. The large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system of claim 2, wherein the visualization window comprises quartz glass and a sealing ring; the quartz glass is installed in a non-tightening mode, and is directly placed inside the visualization window; the outer side end face of the quartz glass is provided with the sealing ring; the sealing ring is a metal graphite wound gasket.
9. The large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system of claim 1, wherein the high-pressure common rail is connected with the fuel injector, and the high-power motor drives the high-pressure fuel pump to rotate so as to deliver high-pressure fuel to the high-pressure common rail.
10. The large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system of claim 1, wherein the constant-volume bomb system collects temperature and pressure data signals by using a sensor and the data acquisition card; the temperature sensor is a probe type thermocouple.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911366592.8A CN110987447A (en) | 2019-12-26 | 2019-12-26 | Large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system |
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| CN201911366592.8A CN110987447A (en) | 2019-12-26 | 2019-12-26 | Large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system |
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| CN110987447A true CN110987447A (en) | 2020-04-10 |
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| CN201911366592.8A Pending CN110987447A (en) | 2019-12-26 | 2019-12-26 | Large-cylinder-diameter optical high-temperature high-pressure constant-volume bomb system |
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| CN111550823A (en) * | 2020-04-20 | 2020-08-18 | 西安交通大学 | Ignition device for spraying constant-volume combustion bomb |
| CN111636989A (en) * | 2020-04-29 | 2020-09-08 | 北京理工大学 | Measuring device for ignition and combustion lag period of jet spray at high and low temperatures |
| AT524427B1 (en) * | 2021-03-22 | 2022-06-15 | Avl List Gmbh | pressure chamber arrangement |
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| AT524427A4 (en) * | 2021-03-22 | 2022-06-15 | Avl List Gmbh | pressure chamber arrangement |
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