CN116481819A - Dual-fuel dual-injection constant-volume combustion bomb and preparation method thereof - Google Patents
Dual-fuel dual-injection constant-volume combustion bomb and preparation method thereof Download PDFInfo
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- CN116481819A CN116481819A CN202310653019.5A CN202310653019A CN116481819A CN 116481819 A CN116481819 A CN 116481819A CN 202310653019 A CN202310653019 A CN 202310653019A CN 116481819 A CN116481819 A CN 116481819A
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- 239000000446 fuel Substances 0.000 title claims abstract description 240
- 238000002347 injection Methods 0.000 title claims abstract description 99
- 239000007924 injection Substances 0.000 title claims abstract description 99
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 74
- 239000000110 cooling liquid Substances 0.000 claims abstract description 62
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000002826 coolant Substances 0.000 claims description 36
- 230000009977 dual effect Effects 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 13
- 238000005507 spraying Methods 0.000 abstract description 8
- 238000003825 pressing Methods 0.000 abstract description 7
- 238000011160 research Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 6
- 230000004323 axial length Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000005357 flat glass Substances 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000003502 gasoline Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/04—Injectors with heating, cooling, or thermally-insulating means
- F02M53/043—Injectors with heating, cooling, or thermally-insulating means with cooling means other than air cooling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a dual-fuel dual-injection constant-volume combustion bomb and a preparation method thereof. A fuel injection device is designed and comprises a lining, a horizontal injector, a sealing rubber plug, a pressing disc and a cooling liquid pipeline. The fuel injection device can be integrally placed in a cylindrical window in the side face of a bomb containing cavity, and the purpose of cooling the horizontal injector is achieved by means of the fact that cooling liquid flows into and out of a cavity between the periphery of the horizontal injector and the lining. According to the dual-fuel dual-injection constant-volume combustion bomb and the preparation method thereof, two same control signals are generated according to the captured injection signal rising edge of an injector at the top of the bomb containing cavity, and therefore the horizontal injector and the injector at the top can conduct synchronous injection of fuel. According to the dual-fuel dual-injection constant-volume combustion bomb and the preparation method thereof, by achieving cooperative work of the two injectors, liquid/liquid and liquid/gas fuel spraying and combustion research work in a dual-fuel dual-injection fuel supply mode can be conveniently carried out at low cost.
Description
Technical Field
The invention belongs to the technical field of alternative fuel spraying and combustion, and relates to improvement of a dual-fuel dual-injection fuel supply mode of a high-temperature high-pressure constant-volume combustion bomb.
Background
In order to cope with the increasingly serious energy and environmental problems, the theory and technology of energy conservation and emission reduction of the internal combustion engine are continuously improved. The advanced combustion modes such as homogeneous compression combustion, reactive control compression combustion and the like mostly adopt a fuel supply mode of dual fuel and dual injection, and the respective advantages of the two fuels are fully exerted through cooperative combustion, so that the purposes of improving the combustion efficiency and reducing the emission are achieved. In addition, under the strategic aim of 'two carbon', the fuel selection of the internal combustion engine tends to be more low-carbon fuel (such as natural gas, dimethyl ether, methanol, ethanol and the like), zero-carbon fuel (such as hydrogen and ammonia) and carbon neutral fuel (such as hydrogen production, ammonia production, methanol production, dimethyl ether production and the like after the renewable energy source generates electricity).
Basic combustion of fuel and chemical reaction kinetics research are the basis for developing dual fuel engines, and constant volume combustion bombs are important devices for developing these studies. The constant volume combustion bomb comprises a bomb cavity body, wherein the bomb cavity body is made of stainless steel and internally provided with a high-temperature resistant ceramic hearth and an electric heating system. The traditional high-temperature high-pressure constant-volume combustion bomb is provided with a high-pressure common rail fuel injector only at the top of a bomb cavity, a cylindrical cavity formed by the hollow part of the bomb cavity is utilized to simulate the high-temperature high-pressure environment of a combustion chamber of an internal combustion engine, and four cylindrical windows of front, back, left and right are usually reserved on the side surface of the bomb cavity, so that the spraying and burning characteristics of single fuel (such as diesel oil and gasoline) can be studied. The fuel injector at the top of the traditional high-temperature high-pressure constant-volume combustion bomb mostly supports liquid fuels with higher viscosity such as diesel oil, gasoline and the like, is not suitable for fuels with lower viscosity and corrosiveness (the low-viscosity fuels have poorer lubricating effect and are easy to cause abrasion and blockage of the injector, the corrosiveness fuels can corrode precise coupling parts in the injector to cause oil leakage phenomenon, and alternative fuels such as ammonia fuel, dimethyl ether, methanol and the like) and can be injected by adopting a horizontal injector for the low-viscosity and corrosiveness fuels.
The dual-fuel dual-injection constant volume combustion bomb (such as CN 107271193A) developed and researched aiming at diesel, gasoline and alternative fuels (such as low-carbon, zero-carbon and carbon neutral fuels) can realize the spraying and combustion of dual-fuel dual injection, but the body structure of the constant volume combustion bomb needs to be redesigned and processed, so that the cost is high. The problem that a cooling system is not easy to design when the horizontal injector is additionally arranged on the basis of the traditional high-temperature high-pressure constant-volume combustion bomb with only the top fuel injector is solved (mainly because the sealing problem is difficult to solve, on one hand, the newly-added injector is difficult to be completely matched with the original bomb cavity due to the fact that the material, the processing method and the injection are instantaneously displaced, the cooling hydraulic pressure is high in the cooling process, the long-time sealing requirement of a single sealing structure is difficult to ensure, and on the other hand, the cooling effect of the cooling liquid is poor, and the sealing is invalid due to the high temperature in the bomb cavity). Chinese patent CN115165379a devised a combustion bomb adapter for installation into a constant volume combustion bomb, with sealing, shock absorbing and cooling components, but the problem with this patent is that: the adapter is large in size and is difficult to match with a common constant-volume combustion bomb; and moreover, the pressure seal is adopted, so that larger cooling liquid pressure is difficult to bear, and the cooling liquid is easy to leak.
At present, a constant volume combustion bomb which is convenient to disassemble and assemble and reliable in sealing and can replace low-viscosity and corrosive fuel for dual-fuel dual-injection experiments when needed is needed.
Disclosure of Invention
The invention aims to provide a dual-fuel dual-injection constant-volume combustion bomb and a preparation method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a dual fuel double injection constant volume combustion bullet, includes fuel injection device, holds the bullet cavity and sets up the first fuel injector that is used for to holding the bullet cavity in injecting fuel on holding the bullet cavity, fuel injection device is including setting up lining on holding the bullet cavity and setting up end cover pressure disk, sealing rubber stopper and the second fuel injector that is used for to holding the bullet cavity in injecting fuel in the lining, sealing rubber stopper and end cover pressure disk in close contact with, leave between sealing rubber stopper and the lining and be used for supplying the space of sprayer coolant liquid circulation flow, sealing rubber stopper is provided with coolant liquid admission pipe and coolant liquid outlet pipe, and one end of coolant liquid admission pipe and coolant liquid outlet pipe is located in the space, and the other end of coolant liquid admission pipe and coolant liquid outlet pipe runs through the end cover pressure disk and extends towards the direction that keeps away from the space, the second fuel injector runs through sealing rubber stopper and space and tightly pushes up on the lining through the end cover pressure disk.
Preferably, the end cap pressure plate is fixed in the bushing by bolts.
Preferably, the end cap pressure plate is provided with a clamping groove for positioning the second fuel injector.
Preferably, the coolant inlet pipe and the coolant outlet pipe each have a length difference at a portion thereof located in the space.
Preferably, the sealing rubber plug comprises a plug body, a plurality of sealing rings arranged in the circumferential direction of the plug body at intervals along the axial direction of the plug body, and a sealing cover used for being in contact with the end cover pressure plate, wherein the sealing cover and one end of the plug body are connected into an integrated structure, and through holes for the second fuel injector, the cooling liquid inlet pipe and the cooling liquid outlet pipe to penetrate are formed in the sealing cover and the plug body (along the axial direction).
Preferably, the bullet containing cavity comprises a window arranged on the side wall of the bullet containing cavity, and the lining is connected with the bullet containing cavity through the window.
Preferably, the fuel injection direction of the first fuel injector is vertical downward, and the fuel injection direction of the second fuel injector is orthogonal to the fuel injection direction of the first fuel injector, and the injection distance is the same.
Preferably, the first fuel injector is connected with a first fuel high-pressure common rail arranged outside the bomb cavity, and the first fuel high-pressure common rail adopts a first ECU controller to control injection pressure; the second fuel injector is connected with a second fuel high-pressure common rail arranged outside the bomb cavity, the second fuel high-pressure common rail adopts a second ECU controller to control injection pressure, the second ECU controller respectively generates two same control signals after triggering, and the signals are used for controlling the first fuel injector and the second fuel injector to synchronously inject fuel.
A preparation method of a dual-fuel dual-injection constant volume combustion bomb comprises the following steps:
the constant volume combustion bomb with a single fuel injector (namely the first fuel injector) is used as a reconstruction object, and the fuel injection device is additionally arranged on the bomb containing cavity of the constant volume combustion bomb, so that the dual-fuel double-injection constant volume combustion bomb is obtained.
Preferably, the drive signal line connecting the original controller (i.e. the controller connected to the constant volume combustion bomb with a single fuel injector, namely the first ECU controller) and the original fuel injector (i.e. the first fuel injector) is broken, and the two break points are respectively connected to the other controller (i.e. the second ECU controller) in an extending way.
The beneficial effects of the invention are as follows:
the invention can obtain the dual-fuel dual-injection constant-volume combustion bomb by additionally installing the proposed fuel injection device under the condition of not changing the structure of the bomb cavity of the original high-temperature high-pressure constant-volume combustion bomb, thereby developing the liquid/liquid, liquid/gas fuel spraying and combustion research work under the dual-fuel dual-injection fuel supply mode. The fuel injection device provided by the invention integrates the bushing, the sealing rubber plug, the end cover pressure plate, the cooling liquid inlet pipe and the cooling liquid outlet pipe with the fuel injector, has compact structure and good cooling function, and can realize the transformation of the dual-fuel double-injection constant-volume combustion bomb conveniently and with low cost.
Furthermore, the fuel injection device provided by the invention only needs to acquire injection signals of the original fuel injectors through the corresponding controller (such as the second ECU controller) while matching with a single oil pressure building system, generates two signals at the moment of identifying the rising edge of the injection signals to respectively control the two injectors, so as to control the two injectors to synchronously inject, namely the original high-temperature high-pressure constant-volume combustion bomb can be used for operating the injection moment and the injection times by self-contained software, an additional design of an operating system is not needed, and the fuel injection device is simple and convenient; in addition, conditions are created for the asynchronous injection experiment (only the interval of the second ECU controller sending a signal is required to be changed).
Drawings
FIG. 1 is a schematic diagram of a dual-fuel dual-injection constant volume combustion bomb for implementing synchronous injection of two sets of injection systems in an embodiment of the present invention;
FIG. 2 is a schematic illustration of a configuration of the side window fuel injection apparatus of FIG. 1;
FIG. 3 is a schematic illustration of a configuration of the side window fuel injector of FIG. 2;
FIG. 4-1 is a side view of the bushing shown in FIG. 2;
FIG. 4-2 is a cross-sectional view (F-F) of the bushing shown in FIG. 2;
FIG. 5-1 is a side view of the sealing rubber stopper of FIG. 2;
FIG. 5-2 is a cross-sectional view (G-G) of the sealing rubber stopper shown in FIG. 2;
FIG. 6-1 is a side view of the end cap platen shown in FIG. 2;
FIG. 6-2 is a cross-sectional view (H-H) of the end cap platen shown in FIG. 2;
FIG. 7 is a schematic diagram of a top fuel injector and side window fuel injector synchronous injection control of the ECU controller of FIG. 1 (delay time is the time required to capture the first ECU controller to send an injection signal);
in the figure: 1-first driving motor, 2-first high-pressure pump, 3-first high-pressure common rail, 4-fuel filter, 5-fuel tank, 6-first ECU controller, 7-top fuel injector, 8-second driving motor, 9-second high-pressure pump, 10-second high-pressure common rail, 11-fuel filter, 12-fuel bottle, 13-side window fuel injector, 14-bomb cavity, 15-liner, 16-end cap pressure plate, 17-sealing rubber plug, 18-injector gasket, 19-coolant inlet pipe, 20-coolant outlet pipe, 21-second ECU controller, 22-rear face, 23-outer stepped surface, 24-through hole, 25-sealing cap, 26-coolant cavity, 27-positioning boss, 28-threaded hole, 29-plug, 30-sealing ring, 31-injector passage hole, 32-coolant passage hole, 33-clamping groove, 34-injector pressure groove, 35-positioning mounting hole, 36-coolant passage mounting hole.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention.
Referring to fig. 1, the invention provides a dual fuel dual injection constant volume combustion bomb by designing a side window fuel injection device and adding the device to a cylindrical constant volume combustion bomb with a top fuel injector 7 (such as an electric control fuel injector). On the basis of a cylindrical constant volume combustion bomb matched with an air inlet system, an air exhaust system, a cooling system, a high-speed camera, a first ECU (electronic control unit) controller 6 and a first injection system connected with a top fuel injector 7, a second ECU controller 21 and a second injection system connected with a side window fuel injector 13 (such as an electric control injector) of a side window fuel injection device are additionally arranged, so that the first injection system and the second injection system can synchronously inject dual fuels (liquid fuel and liquid fuel, liquid fuel and gas fuel) through the top fuel injector 7 and the side window fuel injector 13, and the high-speed camera observes and records, so that the spraying and burning of the fuel injected by each of the two injectors in the dual-fuel double-injection constant volume combustion bomb can be studied.
The cylindrical constant volume combustion bomb further comprises a bomb cavity 14, the top of the bomb cavity 14 is provided with an end cover, the end cover is provided with a fuel injector (namely, a top fuel injector 7) with a nozzle extending into the bomb cavity 14 in a vertical downward direction in the middle, four cylindrical windows (namely, the cylindrical constant volume combustion bomb is provided with four circular transparent observation windows) with heights slightly lower than the end cover and uniformly distributed at intervals are arranged on the side wall of the bomb cavity 14, a high-speed camera is arranged outside the bomb cavity 14 and aligned with one of the circular transparent observation windows, and the other circular transparent observation window is selected for being used for being additionally provided with a fuel injector (namely, a side window fuel injector 13) with a nozzle extending into the bomb cavity 14 in a horizontal direction. The nozzle axis of the side window fuel injector 13 is 90 degrees from the nozzle axis of the top fuel injector 7, and the distance from the intersection point of the two nozzle axes (i.e. the center lines of the two injectors) to each nozzle is the same (i.e. the two nozzles are equidistant from the midpoint of the bomb, which is the midpoint of the connecting line between the centers of the outer circles of the two opposite circular transparent observation windows). Under the condition that the distances are the same, when the two ejectors adopt the same ejection pressure, the front ends of two sprayings formed by ejection can be intersected at the midpoint of the containing bullet, so that observation and recording are convenient, on the basis, the ejection delay or ejection pressure of different ejectors is only required to be changed when the different intersection positions of the sprayings are researched, namely, the research on different ejection conditions is relatively convenient, and the comparison is easy to form.
The first injection system comprises a first driving motor 1, a first high-pressure pump 2, a first high-pressure fuel common rail 3, a fuel filter 4 and a fuel tank 5, wherein a fuel interface of a top fuel injector 7 is connected to the first high-pressure fuel common rail 3 through a fuel supply pipeline, and the fuel supply pressure of the first high-pressure fuel common rail 3 (fuel is purified by the fuel filter 4 before being supplied to the top fuel injector 7) is maintained by the first high-pressure pump 2 (a power source is the first driving motor 1) and the fuel tank 5; the second injection system comprises a second drive motor 8, a second high-pressure pump 9, a second high-pressure common rail 10, a fuel filter 11 and a fuel bottle 12, the fuel interface of the side window fuel injector 13 is connected to the second high-pressure common rail 10 through a fuel supply line, and the fuel supply pressure of the second high-pressure common rail 10 (fuel is purified by the fuel filter 11 before being supplied to the side window fuel injector 13) is maintained by the second high-pressure pump 9 (the power source is the second drive motor 8) and the fuel bottle 12, that is, the side window fuel injector 13 and the top fuel injector 7 nozzles are regulated by separate fuel supply and rail pressure.
Referring to fig. 2, the side window fuel injection device further includes a bushing 15, an end cap pressure plate 16, a sealing rubber stopper 17, a coolant inlet pipe 19, and a coolant outlet pipe 20. The bushing 15 comprises two hollow cylinders (the whole outline is adapted to the shape of a cylindrical window) which are different in diameter and are connected, the side window fuel injector 13 penetrates through the center of the sealing rubber plug 17, the cooling liquid inlet pipe 19 and the cooling liquid outlet pipe 20 are arranged on two sides of the side window fuel injector 13 in parallel through the sealing rubber plug 17, the cooling liquid inlet pipe, the cooling liquid outlet pipe 19 and the cooling liquid outlet pipe 20 are integrally fixed in the bushing 15 through the end cover pressure plate 16 combined with the sealing rubber plug 17 and the side window fuel injector 13, meanwhile, the nozzle of the side window fuel injector 13 extends out of the bushing 15, a certain closed space is formed between the sealing rubber plug 17 and the inner cavity of the bushing 15 to accommodate cooling liquid, the cooling liquid flows into the closed space through the cooling liquid inlet pipe 19 and then flows out through the cooling liquid outlet pipe 20, and the cooling liquid at the periphery of the side window fuel injector 13 flows, and the purpose of cooling the side window fuel injector 13 is achieved. The closed space surrounds the side window fuel injector 13, and is a communicated whole, and the lengths of the cooling liquid inlet pipe 19 and the cooling liquid outlet pipe 20 which extend into the closed space are different, so that the cooling liquid which newly enters the closed space completes a flowing cycle (from the rear end of the side window fuel injector 13 extending into the closed space part to the front end of the side window fuel injector 13 extending into the closed space part) and then is discharged, thereby ensuring the cooling effect (if the lengths of the cooling liquid inlet pipe 19 and the cooling liquid outlet pipe 20 extending into the closed space are equivalent, the cooling liquid can not flow out after completing a flowing cycle in the closed space, and the cooling effect is obviously reduced).
In the invention, a side window fuel injector 13 is arranged at the side cylindrical window position of a bullet containing cavity 14 by using a side window fuel injector, specifically, the side window fuel injector is used for replacing the original window glass, and a pressing device of the window glass is adopted for completing the installation. In order to enable a simple, precise assembly and reliable and efficient operation of the side window fuel injector 13, the side window fuel injection device is specifically designed as follows:
to ensure tightness between the bushing 15 and the bullet-receiving chamber 14, the outer side surface of the bushing 15 is designed to be stepped, the outer stepped surface 23 at the junction of two sections (section a and section B, fig. 4-2) of the bushing 15 is contacted with the inner convex surface of the cylindrical window (the section of the bushing is not hatched in fig. 1 and is compared with the section of the bullet-receiving chamber), the flange plate (not shown in fig. 1) is a circular plate outside the transparent observation window, a circle of bolt holes are arranged on the circular plate, the circular plate is originally used for installing and pressing window glass or window block) is contacted with the rear end surface 22 of the bushing 15, and nuts are installed after corresponding bolts are inserted into the outer end surface of the transparent observation window, so that sealing is realized by applying axial force to the bushing 15, and the radial dimension phi of the section a of the bushing 15 is designed according to the size of the window block c4 The axial length of the section A of the bushing 15 is 1-2 mm greater than the thickness of the window blocking block; since the nozzles of the side window fuel injector 13 mounted on the rear side of the liner 15 need to extend out of the front end surface of the liner by a certain length (e.g., 2 mm), and the lengths of the nozzles of the top fuel injector 7 and the nozzles of the side window fuel injector 13 are equal to each other from the intersection point of the two injector centerlines, the axial dimension of the section B of the liner 15 can be designed according to the nozzle position of the top fuel injector 7, and in order to ensure the volume of the closed space for containing the coolant inside the liner 15, the radial dimension of the section B of the liner 15 should be as large as possible without affecting the mounting.
To ensure proper installation of the side window fuel injector 13 and coolant inlet and outlet tubes 19, 20, the inner cavity of the liner 15 is designed as a stepped cavity (fig. 4-2) and is designed according to the diameter phi of the section B (i.e., nozzle, fig. 3) of the side window fuel injector 13 p1 The center of the front end face of the lining 15 is provided with a diameter phi c1 Such that the nozzle extends out of the bushing 15 (e.g. phi c1 Greater than phi p1 0.5-1 mm); combined with the thickness H of the sealing cap 25 (fig. 5-2) behind the sealing rubber stopper 17 according to the axial length of section a (fig. 3) of the side window fuel injector 13 s A cooling liquid chamber 26 (which is communicated with a through hole 24 arranged at the center of the front end surface of the lining 15 and is used for being combined with the front part of the sealing rubber plug 17The axial dimension of the closed space is formed (for example, the axial length of the cooling liquid cavity 26 and the thickness H of the sealing cover 25 are s The sum being equal to the axial length of section A of the side window fuel injector 13), the coolant cavity 26 diameter phi c2 Should be designed large enough to facilitate coolant flow while ensuring that the wall thickness of the liner 15 is sufficient; the remainder of the bore of the liner 15 increases in radial dimension in stages and communicates with the coolant chamber 26 (the diameter of the portion intermediate the liner 15 and in direct communication with the coolant chamber 26 is taken as the liner bore diameter phi c3 Fig. 4-2), the design is convenient for installing the side window fuel injector 13 and the cooling liquid inlet pipe and the cooling liquid outlet pipe 19 and 20, and a positioning boss 27 (fig. 4-2) for assembling the end cover pressure plate 16 can be formed on the outer side of the end surface of the adjacent cooling liquid cavity 26, four centrally symmetrical threaded holes 28 (fig. 4-1) are formed on the positioning boss 27, so that uniform stress is ensured, the position of the threaded holes 28 is ensured to avoid the protruding part (the protruding part is a fuel interface) on the side window fuel injector 13, a certain allowance is reserved, and the connection of a fuel supply pipeline and the like is convenient.
The sealing rubber plug 17 is designed into a stepped (fig. 5-2), and a friction sealing is adopted to match with a compression sealing cooling liquid sealing structure, so that the tightness between a cooling liquid cavity 26 and an inner cavity of the bushing 15 after the sealing rubber plug 17 is additionally arranged between the side window fuel injector 13 and the bushing 15 is ensured, and the cooling liquid sealing structure is prevented from being invalid due to pressure impact and heating at the moment of injection of the side window fuel injector 13; the front part of the sealing rubber plug 17 has a diameter phi s3 And is greater than the diameter phi of the cooling fluid chamber 26 c2 A 0.5-1 mm plug body 29, a plurality of sealing rings 30 (such as three layers of boss type sealing rings with even interval are arranged on the circumferential outer surface of the plug body 29, fig. 5-2) so that the plug body 29 is tightly combined with the cooling liquid cavity 26 after being fully embedded into the cooling liquid cavity 26, and enough static friction force is generated in injection to axially fasten the cooling liquid inlet pipe, the outlet pipe 19 and the outlet pipe 20, and a sealing cover 25 (integrally connected with the rear end of the plug body 29) at the rear part of the sealing rubber plug 17 has a diameter phi s4 Greater than phi s3 5-10 mm and is smaller than the minimum length of the center of the screw hole 28 formed on the positioning boss 27 of the bushing 15 from the center of the bushing 15 (preventing the sealing cover 25 from shielding the screw hole 28 after clinging to the positioning boss 27), so as to facilitateIn coordination with the compression and installation of the end cap platen 16, the center of the sealing rubber plug 17 is perforated (referred to as injector via 31, bore diameter phi s1 Fig. 5-1), according to the injector diameter phi p2 (taking the radial dimension of the section A of the side window fuel injector 13 through the injector via 31 as the injector diameter φ) p2 FIG. 3) design phi s1 Less than phi p2 1-3 mm, and simultaneously, a hole (collectively referred to as a coolant pipe via hole 32, a bore diameter phi) is drilled on both sides of the injector via hole 31 on the sealing rubber plug 17 s2 5-1), designing phi according to the diameter of the coolant pipes (specifically, coolant inlet and outlet pipes 19, 20) s2 The punching position of the coolant pipe through hole 32 is symmetrical center and avoids the protruding part (the protruding part is a fuel interface) on the side window fuel injector 13, which is smaller than the outer diameter of the corresponding coolant pipe by 0.5-1 mm.
The end cap pressure plate 16 is used for pressing the sealing rubber plug 17 and fixing the side window fuel injector 13. The end cap platen 16 is generally cylindrical (FIGS. 6-1, 6-2), diameter phi y1 Is smaller than the diameter phi of the inner cavity of the bushing c3 From 5 mm to 8mm, the end cover platen 16 is radially grooved from the edge (referred to as a clamping groove 33, the groove depth is greater than the radius of the end cover platen 16, and the groove width L y 6-1), according to the injector indent 34 (the portion of segment A immediately adjacent to the side window fuel injector 13 that extends through the injector via 31, FIG. 3) width L p Design L y Greater than L p 1-2 mm, the bottom of the clamping groove 33 is arc-shaped so as to be closely attached to the outer surface of the ejector pressing groove 34, and the arc radius R y According to the diameter phi of the injector p2 Design, end cover platen 16 thickness H y Slightly less than the axial length H of the injector indent 34 P Positioning mounting holes 35 (fig. 6-1) are formed in the end cover platen 16 according to the threaded holes 28 formed in the positioning boss 27 in the bushing 15, and the aperture (diameter) phi of the positioning mounting holes 35 is formed y2 The same bore diameter as the threaded bore 28 described above and is 2mm larger than the diameter of the bolts used to assemble the end cap platen 16; according to the cooling liquid pipeline through hole 32 on the sealing rubber plug 17, a cooling liquid pipeline mounting hole 36 (the center of the punching position is collinear with the center line of the clamping groove 33, fig. 6-1) is formed on the end cover pressure plate 16, and the aperture phi of the cooling liquid pipeline mounting hole 36 y3 Greater than phi s2 1～2mm。
According to the above design of the side window fuel injection device, the component parts thereof are assembled before the side window fuel injection device is installed, namely, the side window fuel injector 13 is firstly installed in the sealing rubber plug 17, the rear end of the sealing rubber plug 17 is flush with the front end of the injector pressing groove 34, then the end cover pressure plate 16 is pushed into the injector pressing groove 34 along the clamping groove 33, one of the cooling liquid pipe through holes 32 (for penetrating the cooling liquid inlet pipe 19) on the sealing rubber plug 17 is aligned with the cooling liquid pipe mounting hole 36 on the end cover pressure plate 16 through rotation, then the cooling liquid inlet pipe 19 and the cooling liquid flow pipe 20 are respectively inserted along the cooling liquid pipe mounting hole 36 and the clamping groove 33 until the two cooling liquid pipes respectively penetrate out of the front end of the sealing rubber plug 17 through the two cooling liquid pipe through holes 32, the whole formed by the assembly is installed in the liner 15, the positioning mounting hole 35 on the end cover pressure plate 16 is aligned with the threaded hole 28 formed on the boss 27 of the liner 15, then a high-strength bolt is put in, so that the injector gasket 18 (for penetrating the nozzle tip end face of the side window fuel injector 13 is tightly contacted with the nozzle tip face of the sealing boss 27) of the liner 15 (24) is tightly stretched out of the sealing boss 2mm in front end face of the liner 15) through the sealing boss 2 (25 mm) and the sealing boss 2 is tightly contacted with the front end face of the sealing boss 2). The assembled side window fuel injection device is arranged in a cylindrical window on the side surface of the bullet containing cavity 14, a high-strength bolt and a nut are adopted to fix and press the flange, and a circular ring type asbestos gasket is arranged at the contact position of the lining 15 (specifically, the convex step surface 23) and the boss surface in the cylindrical window so as to improve the tightness.
The air inlet system consists of an external high-pressure air tank, an air inlet pipeline, an electromagnetic valve and the like, and is mainly used for providing corresponding gas environment and back pressure for the combustion of fuel injected in the bomb cavity 14; the exhaust system comprises an exhaust pipe and an electromagnetic valve (additionally provided with a manual valve), and mainly aims to exhaust the waste gas in the bomb cavity 14 after the test and prepare for the next test. The front ends of the cooling liquid inlet pipe 19 and the cooling liquid outlet pipe 20 are led into a cooling liquid cavity 26 in the bushing 15, the top fuel injector 7 and the side window fuel injector 13 share a set of cooling system (an external water chiller is arranged), a liquid outlet pipe of the external water chiller is connected with the rear end of the cooling liquid inlet pipe 19, and a liquid return pipe of the external water chiller is connected with the rear end of the cooling liquid outlet pipe 20, so that continuous cooling of the side window fuel injector 13 is realized through circulation of cooling liquid.
The invention is based on a control system (comprising a controller, namely a first ECU controller 6, fig. 1) of a fuel injector (specifically a top fuel injector 7) matched with the cylindrical constant volume combustion bomb, and is additionally provided with a controller (namely a second ECU controller 21, fig. 1), and the injection of the top fuel injector 7 and the side window fuel injector 13 is simultaneously controlled by the controller, and the specific adding and controlling principle is as follows:
(1) Breaking the injection driving signal line (i.e., the line when A, a, b, B in fig. 1 is originally connected) for controlling the top fuel injector 7 by the original controller (i.e., the first ECU controller 6) and changing it into the Aa and bB segments; (2) The second ECU controller 21 collects the control signal of the first ECU controller 6 to the top fuel injector 7 from the point a, and the driving voltage waveform of the control signal is shown as the injection signal of the first ECU controller in fig. 7 (the injection signal has the voltage of 0V when no injection trigger exists, the voltage rapidly rises when the injection trigger exists, the high voltage modulation is started after the voltage reaches 15V, the low voltage modulation is then performed, and the voltage is finally reduced to 0V to complete the primary fuel injection control process); (3) When the second ECU controller 21 detects that the voltage at the point a exceeds 0.3V, it is considered that the first ECU controller 6 issues an injection trigger signal, that is, the capturing of the injection trigger by the first ECU controller 6 is completed. (4) The second ECU controller 21 sends out two identical control signals after detecting the injection trigger signal of the first ECU controller 6, the driving voltage waveforms of the two identical control signals are shown in fig. 7, one control signal reaches the point B (the electric control signal interface of the top fuel injector 7) through the point B and is used for controlling the top fuel injector 7, the other control signal reaches the corresponding interface (the electric control signal interface of the side window fuel injector 13) and is used for controlling the side window fuel injector 13, and therefore the problem that the injection signal of the first ECU controller is controlled by the cylindrical constant volume combustion bomb with software, and the two signals are difficult to generate is solved, and the aim that two sets of injection systems synchronously inject through corresponding injectors (the injection time is identical) is achieved.
Claims (10)
1. A dual fuel dual injection constant volume combustion bomb, characterized in that: including fuel injection device, hold bullet cavity (14) and set up the first fuel injector that is used for injecting fuel to holding bullet cavity (14) on holding bullet cavity (14), fuel injection device is including setting up bush (15) on holding bullet cavity (14) and setting up end cover pressure disk (16) in bush (15), sealing rubber stopper (17) and be used for holding bullet cavity (14) in the second fuel injector of injection fuel, sealing rubber stopper (17) and end cover pressure disk (16) in close contact with, leave between sealing rubber stopper (17) and bush (15) and be used for supplying the circulation of sprayer coolant liquid to flow space, be provided with coolant liquid inlet tube (19) and coolant liquid outlet tube (20) on sealing rubber stopper (17), one end of coolant liquid inlet tube (19) and coolant liquid outlet tube (20) is located in the space, and the other end of coolant liquid inlet tube (19) and coolant liquid outlet tube (20) runs through end cover (16) and extends towards the direction of keeping away from holding bullet cavity, sealing rubber stopper (17) and sealing rubber stopper (17) are passed through and are passed through in tight end cover (15).
2. A dual fuel dual injection constant volume combustion bomb as claimed in claim 1, wherein: the end cover pressure plate (16) is fixed in the bushing (15) through bolts.
3. A dual fuel dual injection constant volume combustion bomb as claimed in claim 1, wherein: the end cap pressure plate (16) is provided with a clamping groove (33) for positioning the second fuel injector.
4. A dual fuel dual injection constant volume combustion bomb as claimed in claim 1, wherein: the coolant inlet pipe (19) and the coolant outlet pipe (20) are each located in the space and have a difference in length.
5. A dual fuel dual injection constant volume combustion bomb as claimed in claim 1, wherein: the sealing rubber plug (17) comprises a plug body (29), a plurality of sealing rings (30) which are arranged at intervals in the circumferential direction of the plug body (29) and a sealing cover (25) which is used for being in contact fit with the end cover pressure plate (16), wherein the sealing cover (25) is connected with one end of the plug body (29), and through holes for the second fuel injector, the cooling liquid inlet pipe (19) and the cooling liquid outlet pipe (20) to penetrate are formed in the sealing cover (25) and the plug body (29).
6. A dual fuel dual injection constant volume combustion bomb as claimed in claim 1, wherein: the bullet containing cavity (14) comprises a window arranged on the side wall of the bullet containing cavity (14), and the lining (15) is connected with the bullet containing cavity (14) through the window.
7. A dual fuel dual injection constant volume combustion bomb as claimed in claim 1, wherein: the fuel injection direction of the first fuel injector is vertical downward, the fuel injection direction of the second fuel injector is orthogonal to the fuel injection direction of the first fuel injector, and the injection distance is the same.
8. A dual fuel dual injection constant volume combustion bomb as claimed in claim 1, wherein: the first fuel injector is connected with a first fuel high-pressure common rail (3) arranged outside the bullet containing cavity (14), and the first fuel high-pressure common rail (3) adopts a first ECU (electronic control unit) controller (6) to control injection pressure; the second fuel injector is connected with a second fuel high-pressure common rail (10) arranged outside the bomb containing cavity (14), the second fuel high-pressure common rail (10) adopts a second ECU (electronic control unit) controller (21) to control injection pressure, the second ECU controller (21) respectively generates two identical control signals after triggering, and the signals are used for controlling the first fuel injector and the second fuel injector to synchronously inject fuel.
9. A preparation method of a dual-fuel dual-injection constant volume combustion bomb is characterized by comprising the following steps of: the method comprises the following steps:
the constant volume combustion bomb with a single fuel injector, namely a first fuel injector, is used as a transformation object, a fuel injection device is additionally arranged on a bomb accommodating cavity (14) of the constant volume combustion bomb, so that the dual-fuel double-injection constant volume combustion bomb is obtained, the fuel injection device comprises a lining (15) arranged on the bomb accommodating cavity (14) and an end cover pressure plate (16) arranged in the lining (15), a sealing rubber plug (17) and a second fuel injector used for injecting fuel into the bomb accommodating cavity (14), the sealing rubber plug (17) is tightly contacted with the end cover pressure plate (16), a space for circulating and flowing of cooling liquid for the injector is reserved between the sealing rubber plug (17) and the lining (15), a cooling liquid inlet pipe (19) and a cooling liquid outlet pipe (20) are arranged on the sealing rubber plug (17), one end of the cooling liquid inlet pipe (19) and one end of the cooling liquid outlet pipe (20) are positioned in the space, the other end of the cooling liquid inlet pipe (19) and the cooling liquid outlet pipe (20) penetrates through the end cover pressure plate (16) and is far away from the space, and extends towards the direction of the fuel pressure plate and is tightly pushed against the sealing rubber plug (17) and penetrates through the end cover (16).
10. The method for preparing the dual-fuel dual-injection constant volume combustion bomb according to claim 9, wherein the method comprises the following steps: the method also comprises the following steps: breaking a driving signal line connecting a primary controller and a primary fuel injector, wherein the primary controller is a first ECU (electronic control unit) controller (6) connected with a constant volume combustion bomb with a single fuel injector, and the primary fuel injector is the first fuel injector; two break points formed after the drive signal line is broken are respectively connected to a second ECU controller (21) in an extending manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310653019.5A CN116481819A (en) | 2023-06-02 | 2023-06-02 | Dual-fuel dual-injection constant-volume combustion bomb and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310653019.5A CN116481819A (en) | 2023-06-02 | 2023-06-02 | Dual-fuel dual-injection constant-volume combustion bomb and preparation method thereof |
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| CN202310653019.5A Pending CN116481819A (en) | 2023-06-02 | 2023-06-02 | Dual-fuel dual-injection constant-volume combustion bomb and preparation method thereof |
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| CN (1) | CN116481819A (en) |
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- 2023-06-02 CN CN202310653019.5A patent/CN116481819A/en active Pending
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