CN113945382A - Internal combustion power visual test evaluation system - Google Patents
Internal combustion power visual test evaluation system Download PDFInfo
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- CN113945382A CN113945382A CN202111203458.3A CN202111203458A CN113945382A CN 113945382 A CN113945382 A CN 113945382A CN 202111203458 A CN202111203458 A CN 202111203458A CN 113945382 A CN113945382 A CN 113945382A
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- 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
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Abstract
The utility model provides a visual test evaluation system of internal combustion power, belongs to driving system capability test technical field for realize the test research of the process of taking a breath, the oil-gas mixture process of multiple motion form piston internal combustion driving system. The test evaluation system adopts a high-speed photography method and a tracer particle body method to research the air exchange process and the mixing process of the internal combustion power system with different motion types, obtains the flow field distribution of the air exchange process and the mixing process of the internal combustion power system, the physical field changes of the mixed flow of multiple components and the like, and basic macroscopic parameters of temperature, pressure and the like, can comprehensively evaluate the air exchange performance and the mixing effect of the internal combustion power system under different conditions, and can also provide test basis for the design optimization of the air exchange system and a fuel injection system so as to further improve the performance of the internal combustion power system.
Description
Technical Field
The invention belongs to the technical field of power system performance testing, and particularly relates to an internal combustion power visual testing and evaluating system which is used for realizing visual testing of air exchange performance of an opposed piston engine in various piston operation modes.
Background
Under the large background of international carbon neutralization, the research and development of an efficient, low-carbon and environment-friendly power system becomes a key for meeting national production and social development. Existing power systems are primarily fueled by fluids (liquids and gases), which benefit from fluid fuels to facilitate fuel delivery and tissue combustion. The most direct application of fluid fuel is to ignite and burn the fluid fuel by mixing with air in a power system, and to push a machine to do volume work by the expansion of high-temperature gas. The core of the power system taking liquid and gas as fuel is the organization of a ventilation process, an oil-gas mixing process and a combustion process, and the core problem is the organization of the ventilation process and the oil-gas mixing process. The traditional power system visual test platform is limited by the limitation of a piston motion mode, and can not flexibly organize turbulence motion of other modes such as vortex, tumble, extrusion flow and the like in various modes in a cylinder, so that the research on a novel ventilation mode, an oil-gas mixing mode and the like is limited. On the premise of greatly reducing carbon dioxide emission in the international society, the key of the renewal of the fluid fuel power system lies in the exploration of the combustion modes of the traditional fuel low-carbon combustion and the novel low-carbon and zero-carbon fluid fuel, so that a novel design platform with more flexible and comprehensive testing means is needed.
Disclosure of Invention
The technical problems solved by the invention are as follows: the invention provides a visual test and evaluation system for internal combustion power, which is suitable for testing and researching the air exchange process and the oil-gas mixing process of piston type internal combustion power systems with various motion forms.
The technical scheme adopted by the invention is as follows: the internal combustion power visual test evaluation system comprises a mechanical system, an air exchange system, a fuel injection system, a test system and a shooting system, wherein the mechanical system comprises a cylinder sleeve, two air outlets are distributed on the cylinder sleeve along the circumference, one air inlet is arranged on the cylinder sleeve, the other air outlet is arranged on the cylinder sleeve, an air inlet cavity is arranged at the position corresponding to the air inlet, an air outlet cavity is arranged at the position corresponding to the air outlet, the cylinder sleeve is fixed on a test bed, a piston assembly capable of freely sliding in the axial direction is matched inside the cylinder sleeve, and the piston assembly is driven by a stepping motor arranged outside the cylinder sleeve to do corresponding motion rules; the ventilation system comprises an air inlet system and an exhaust system, the air inlet system is communicated with the air inlet cavity, the air inlet flow in the air inlet system is provided with tracer particles, the exhaust system is communicated with the exhaust cavity, and the exhaust system recovers the tracer particles in the exhaust gas and then exhausts the air; the fuel injection system is communicated with the cylinder sleeve and is used for injecting fuel into the cylinder sleeve at proper time; the testing system comprises a pressure sensor, a temperature sensor and a flow sensor which are arranged in an air intake and exhaust system, and a temperature sensor and a pressure sensor which are arranged in an air cylinder sleeve, wherein each sensor transmits data to a control computer through a data acquisition device I; the shooting system is used for shooting axial and radial air flow in the cylinder sleeve, and data shot by the shooting system is transmitted to the control computer through the data acquisition device II.
In a further limitation of the technical scheme, the ventilation system comprises an air inlet filter, a blower, an air inlet control valve, a tracer particle generator, an air inlet heating device, a back pressure valve and a tracer particle recovery device; the inlet filter, the blower, the inlet control valve, the tracer particle generator and the inlet heating device form an inlet system, the outlet of the inlet filter is communicated with the inlet of the blower, the outlet of the blower is communicated with the inlet of the inlet control valve, the outlet of the inlet control valve and the outlet of the tracer particle generator are both communicated with the inlet of the inlet heating device, and the outlet of the inlet heating device is communicated with the inlet cavity; the back pressure valve and the trace particle recovery device form an exhaust system, an inlet of the back pressure valve is communicated with the exhaust cavity, and an outlet of the back pressure valve is communicated with the trace particle recovery device; air is pressurized under the action of an air blower after being filtered by the air inlet filter, the air flow is regulated and controlled by the air inlet control valve, tracer particles emitted by the tracer particle generator flow into the air inlet cavity along with the air inlet, the air with the tracer particles enters the exhaust system through the air cylinder sleeve and the exhaust cavity, and the air enters the tracer particle recovery device through the back pressure valve to be recovered and then is discharged.
The technical scheme is further limited, the cylinder sleeve is fixed on the test bed through a supporting device, the piston assembly comprises a piston and a screw rod connected with the piston, the piston is adapted inside the cylinder sleeve and can freely slide in the cylinder sleeve, and the piston is provided with two sealing rings and used for sealing air in the cylinder sleeve; the screw rod is connected with a stepping motor.
Further limited to the above technical scheme, the cylinder sleeve is made of transparent materials.
The technical scheme is further limited, the fuel injection system comprises a fuel injector, a common rail pipe, an oil pump and an oil tank, the fuel injector is connected with the cylinder sleeve through an adapter, the inlet of the fuel injector is connected with the common rail pipe, the common rail pipe is connected with the oil pump, and the oil pump is communicated with the oil tank; and fuel oil is conveyed from the oil tank to the oil injector through the oil pump and the common rail pipe, and the oil injector sprays the fuel oil timely in the ventilation process.
In order to further limit the technical scheme, the shooting system comprises a high-speed camera and a light source, and the high-speed camera is connected with the data acquisition device II.
According to the technical scheme, the light source and the high-speed camera are respectively placed on two sides of the cylinder sleeve, and the shooting angle of the air inlet or the air exhaust in the cylinder sleeve in the axial direction can be realized.
The technical scheme is further limited, the light source is placed on the side portion of the cylinder sleeve, the piston assembly on one side of the cylinder sleeve is removed, the transparent blocking piece is installed at the position, the high-speed camera is arranged at the end portion, corresponding to the transparent blocking piece, of the cylinder sleeve, and the shooting angle of air inlet or air exhaust in the cylinder sleeve in the radial direction can be achieved.
Compared with the prior art, the invention has the advantages that:
1. the scheme is a universal platform with the flexibility and the adjustability of piston motion, the platform is suitable for testing and researching the ventilation process and the oil-gas mixing process of piston type internal combustion power systems in various motion modes, and a new idea is provided for innovation and research of novel power systems. The test evaluation system adopts a high-speed photography method and a tracer particle method to research the air exchange process and the mixing process of the internal combustion power system with different motion types, obtains the physical field changes such as flow field distribution, mixed flow of multiple components and the like of the air exchange process and the mixing process of the internal combustion power system, and basic macroscopic parameters such as temperature, pressure and the like, can comprehensively evaluate the air exchange performance and the mixing effect of the internal combustion power system under different conditions, and can also provide test basis for the design optimization of the air exchange system and a fuel injection system so as to further improve the performance of the internal combustion power system;
2. the piston motion accessible step motor in the cylinder liner of this scheme sets up different motion forms, can accomplish the motion of different phases and different forms to the volume motion in the jar of different forms is realized to the jar, combines fuel injection system to realize the test to the oil-gas mixture process simultaneously, thereby explores novel oil-gas mixture and organizes the mode.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the mechanical system of the present invention;
FIG. 3 is a cross-sectional view of the mechanical system of the present invention;
FIG. 4 is a view showing an arrangement structure of the photographing system in the axial direction of the photographing system according to the present invention;
fig. 5 is a view showing a radial shooting arrangement structure of the shooting system in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements" does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Referring to fig. 1-5, embodiments of the present invention are described in detail.
The internal combustion power visual test evaluation system comprises a mechanical system, a ventilation system, a fuel injection system, a test system and a shooting system.
The core main body of the internal combustion power visual test evaluation system is a mechanical system, the mechanical system comprises a cylinder sleeve 14, the cylinder sleeve 14 is made of transparent materials, two exhaust ports are distributed on the cylinder sleeve 14 along the circumference, one exhaust port is an air inlet, the other exhaust port is an air outlet, an air inlet cavity 6 is arranged at the position corresponding to the air inlet, an exhaust cavity 7 is arranged at the position corresponding to the exhaust port, the air inlet cavity 6 and the exhaust cavity 7 are hollow, and are respectively communicated with the interior of the cylinder sleeve 14 through the air inlet and the exhaust port; the cylinder sleeve 14 is fixed on a test bed through a support device 12, two piston assemblies 13 capable of freely sliding in the axial direction are symmetrically matched in the cylinder sleeve 14, and the piston assemblies 13 are driven to move according to a corresponding movement rule through a stepping motor 11 arranged outside the cylinder sleeve 14; specifically, piston assembly 13 contains the piston and the screw rod of being connected with the piston, the piston adaptation is inside at cylinder jacket 14 and can freely slide in cylinder jacket 14, be provided with two sealing washers on the piston and be used for sealing up the air in cylinder jacket 14, the screw rod links to each other with step motor 11, sets up corresponding law of motion through step motor 1 and can make the piston move according to the law of motion of difference.
The ventilation system comprises an air inlet system and an exhaust system, the air inlet system is communicated with an air inlet cavity 6, tracer particles are contained in air inlet flow in the air inlet system, the exhaust system is communicated with an exhaust cavity 7, and the exhaust system recovers the tracer particles in exhaust gas and then exhausts the air. Specifically, the ventilation system comprises an air inlet filter 1, a blower 2, an air inlet control valve 3, a tracer particle generator 4, an air inlet heating device 5, a back pressure valve 8 and a tracer particle recovery device 9; the inlet filter 1, the blower 2, the inlet control valve 3, the tracer particle generator 4 and the inlet heating device 5 form an inlet system, the outlet of the inlet filter 1 is communicated with the inlet of the blower 2, the outlet of the blower 2 is communicated with the inlet of the inlet control valve 3, the outlet of the inlet control valve 3 and the outlet of the tracer particle generator 4 are both communicated with the inlet of the inlet heating device 5, and the outlet of the inlet heating device 5 is communicated with the inlet cavity 6; the back pressure valve 8 and the tracer particle recovery device 9 form an exhaust system, an inlet of the back pressure valve 8 is communicated with the exhaust cavity 7, and an outlet of the back pressure valve 8 is communicated with the tracer particle recovery device 9.
During operation, air passes through air intake system, filters the back through admitting air and 1, with air pressurization under the effect of air-blower 2, air is through admitting air control valve 3 regulation and control air intake flow, then is provided with tracer particle generator 4 on the air intake pipe way, and the tracer particle gets into air inlet chamber 6 along with admitting air flow. The air with tracer particles enters an exhaust pipeline through a cylinder sleeve 14 and an exhaust cavity 7, and enters a tracer particle recovery device 9 through a back pressure valve 8, and the air is discharged after the tracer particles are recovered.
The fuel injection system is communicated with the cylinder sleeve 14 and is used for injecting fuel into the cylinder sleeve 14 at proper time; the fuel injection system comprises a fuel injector 15, a common rail pipe 17, a fuel pump 18 and a fuel tank 19, wherein the fuel injector 15 is connected with a cylinder sleeve 14 through an adapter, an inlet of the fuel injector 15 is connected with the common rail pipe 17, the common rail pipe 17 is connected with the fuel pump 18, and the fuel pump 18 is communicated with the fuel tank 19. The fuel oil passes through the oil pump 18 and the common rail pipe 17 from the oil tank 19 and is conveyed to the fuel injector 15, and the fuel injector 15 can inject the fuel oil in time in the ventilation process to study the process of oil-gas mixing.
The test system comprises a pressure sensor, a temperature sensor and a flow sensor which are arranged in an air intake and exhaust system, and a temperature sensor and a pressure sensor which are arranged in a cylinder sleeve 14, wherein each sensor transmits data to a control computer through a data acquisition device I10.
The shooting system is used for shooting the axial and radial air flow in the cylinder sleeve 14, and data shot by the shooting system is transmitted to the control computer through the data acquisition device II 20. The shooting system comprises a high-speed camera 16 and a light source 21, and the high-speed camera 16 is connected with a data acquisition device II 20. The light source 21 and the high-speed camera 16 are respectively arranged on two sides of the cylinder sleeve 14, so that the shooting angle of the air inlet or exhaust axis in the cylinder sleeve 14 can be realized, as shown in fig. 4; the light source 21 is placed at the side of the cylinder liner 14, the piston assembly 13 on one side of the cylinder liner 14 is removed, a transparent baffle 22 is installed at the position, and the high-speed camera 16 is arranged at the end of the cylinder liner 14 corresponding to the transparent baffle 22, so that the shooting angle of the air intake or exhaust in the cylinder liner 14 in the radial direction can be realized, as shown in fig. 5.
The invention relates to a universal platform with flexibly adjustable piston movement, which can be suitable for testing and researching the air exchange process and the oil-gas mixing process of piston type internal combustion power systems with various movement forms.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. Internal combustion power visual test evaluation system, its characterized in that: the device comprises a mechanical system, an air exchange system, a fuel injection system, a test system and a shooting system, wherein the mechanical system comprises a cylinder sleeve (14), two air outlets are distributed on the cylinder sleeve (14) along the circumference, one air inlet is arranged on the cylinder sleeve, one air outlet is arranged on the cylinder sleeve, an air inlet cavity (6) is arranged at the position corresponding to the air inlet, an air outlet cavity (7) is arranged at the position corresponding to the air outlet, the cylinder sleeve (14) is fixed on a test bed, a piston assembly (13) capable of freely sliding in the axial direction is matched inside the cylinder sleeve (14), and the piston assembly (13) is driven by a stepping motor (11) arranged outside the cylinder sleeve (14) to perform corresponding movement rules; the ventilation system comprises an air inlet system and an exhaust system, the air inlet system is communicated with an air inlet cavity (6), inlet airflow in the air inlet system is provided with tracer particles, the exhaust system is communicated with an exhaust cavity (7), and the exhaust system recovers the tracer particles in exhaust gas and then exhausts the air; the fuel injection system is communicated with the cylinder sleeve (14) and is used for injecting fuel into the cylinder sleeve (14) at proper time; the testing system comprises a pressure sensor, a temperature sensor and a flow sensor which are arranged in an air intake and exhaust system, and a temperature sensor and a pressure sensor which are arranged in an air cylinder sleeve (14), wherein each sensor transmits data to a control computer through a data acquisition device I (10); the shooting system is used for shooting axial and radial air flow in the cylinder sleeve (14), and data shot by the shooting system is transmitted to the control computer through the data acquisition device II (20).
2. The internal combustion power visualization test evaluation system according to claim 1, characterized in that: the ventilation system comprises an air inlet filter (1), a blower (2), an air inlet control valve (3), a tracer particle generator (4), an air inlet heating device (5), a back pressure valve (8) and a tracer particle recovery device (9); the air inlet filter (1), the air blower (2), the air inlet control valve (3), the tracer particle generator (4) and the air inlet heating device (5) form an air inlet system, an outlet of the air inlet filter (1) is communicated with an inlet of the air blower (2), an outlet of the air blower (2) is communicated with an inlet of the air inlet control valve (3), outlets of the air inlet control valve (3) and the tracer particle generator (4) are communicated with an inlet of the air inlet heating device (5), and an outlet of the air inlet heating device (5) is communicated with the air inlet cavity (6); the back pressure valve (8) and the trace particle recovery device (9) form an exhaust system, the inlet of the back pressure valve (8) is communicated with the exhaust cavity (7), and the outlet of the back pressure valve (8) is communicated with the trace particle recovery device (9); air is filtered through the air inlet filter (1), air is pressurized under the action of the air blower (2), air inlet flow is regulated and controlled through the air inlet control valve (3), tracer particles emitted by the tracer particle generator (4) flow along with air inlet to enter the air inlet cavity (6), air with tracer particles enters the exhaust system through the cylinder sleeve (14) and the exhaust cavity (7), and enters the tracer particle recovery device (9) through the backpressure valve (8) to be recovered and then is discharged.
3. The internal combustion power visualization test evaluation system according to claim 1, characterized in that: the cylinder sleeve (14) is fixed on a test bed through a supporting device (12), the piston assembly (13) comprises a piston and a screw rod connected with the piston, the piston is adapted inside the cylinder sleeve (14) and can freely slide in the cylinder sleeve (14), and two sealing rings are arranged on the piston and used for sealing air in the cylinder sleeve (14); the screw rod is connected with a stepping motor (11).
4. The internal combustion power visualization test evaluation system according to claim 1 or 4, characterized in that: the cylinder sleeve (14) is made of transparent materials.
5. The internal combustion power visualization test evaluation system according to claim 1, characterized in that: the fuel injection system comprises a fuel injector (15), a common rail pipe (17), a fuel pump (18) and a fuel tank (19), wherein the fuel injector (15) is connected with a cylinder sleeve (14) through an adapter, an inlet of the fuel injector (15) is connected with the common rail pipe (17), the common rail pipe (17) is connected with the fuel pump (18), and the fuel pump (18) is communicated with the fuel tank (19); fuel oil is conveyed to the fuel injector (15) from the fuel tank (19) through the oil pump (18) and the common rail pipe (17), and the fuel injector (15) injects the fuel oil into the cylinder sleeve (14) timely in the ventilation process.
6. The internal combustion power visualization test evaluation system according to claim 1, characterized in that: the shooting system comprises a high-speed camera (16) and a light source (21), wherein the high-speed camera (16) is connected with a data acquisition device II (20).
7. The internal combustion power visualization test evaluation system according to claim 6, characterized in that: the light source (21) and the high-speed camera (16) are respectively arranged on two sides of the cylinder sleeve (14) to realize the axial shooting angle of air inlet or air outlet in the cylinder sleeve (14).
8. The internal combustion power visualization test evaluation system according to claim 6, characterized in that: the light source (21) is placed on the side of the cylinder sleeve (14), the piston assembly (13) on one side of the cylinder sleeve (14) is removed, a transparent blocking sheet (22) is installed at the position, and the high-speed camera (16) is arranged at the end part of the cylinder sleeve (14) corresponding to the transparent blocking sheet (22), so that the radial shooting angle of air inlet or air outlet in the cylinder sleeve (14) can be realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111203458.3A CN113945382B (en) | 2021-10-15 | 2021-10-15 | Visual test evaluation system for internal combustion power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111203458.3A CN113945382B (en) | 2021-10-15 | 2021-10-15 | Visual test evaluation system for internal combustion power |
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| CN113945382A true CN113945382A (en) | 2022-01-18 |
| CN113945382B CN113945382B (en) | 2023-06-23 |
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| CN114486644A (en) * | 2022-04-01 | 2022-05-13 | 潍柴动力股份有限公司 | Mixed visual test bed and mixed uniformity detection method |
| CN114660228A (en) * | 2022-04-07 | 2022-06-24 | 中北大学 | Fuel droplet combustion system with adjustable combustion intensity |
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| Publication number | Publication date |
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| CN113945382B (en) | 2023-06-23 |
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