CN110173382B - Oil sprayer cooling system for spray combustion experiment in combustion bomb - Google Patents
Oil sprayer cooling system for spray combustion experiment in combustion bomb Download PDFInfo
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- CN110173382B CN110173382B CN201910342129.3A CN201910342129A CN110173382B CN 110173382 B CN110173382 B CN 110173382B CN 201910342129 A CN201910342129 A CN 201910342129A CN 110173382 B CN110173382 B CN 110173382B
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- 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
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Abstract
本发明公开了一种用于燃烧弹中喷雾燃烧实验的喷油器冷却系统，涉及动力机械喷雾燃烧领域，包括喷油器冷却水套、冷却液箱、冷却液入口管道、冷却液出口管道、冷却液泵和温度传感器；喷油器冷却水套设置在喷油器外侧，喷油器通过机械夹具固定在喷油器冷却水套的正中间；此喷油器冷却水套内由喷油器帽、支撑环、喷油器装配盖构成冷却液腔；所述喷油器冷却水套的进出口分别设置有冷却液入口管道和冷却液出口管道，管道内通有冷却液；所述冷却液入口管道与冷却液泵相连；所述冷却液入口管道和冷却液出口管道各安装有一个温度传感器。该冷却系统可根据目标实验工况的不同，调节不同的冷却液温度，从而实现对喷油器内燃油温度的精确控制。
The invention discloses a fuel injector cooling system used for spray combustion experiments in incendiary bombs, and relates to the field of power machinery spray combustion. Coolant pump and temperature sensor; the fuel injector cooling water jacket is arranged outside the fuel injector, and the fuel injector is fixed in the middle of the fuel injector cooling water jacket by a mechanical clamp; the fuel injector cooling water jacket is controlled by the fuel injector The cap, the support ring, and the fuel injector assembly cover constitute a cooling liquid cavity; the inlet and outlet of the cooling water jacket of the fuel injector are respectively provided with a cooling liquid inlet pipe and a cooling liquid outlet pipe, and the cooling liquid passes through the pipes; the cooling liquid The inlet pipe is connected with the cooling liquid pump; the cooling liquid inlet pipe and the cooling liquid outlet pipe are each installed with a temperature sensor. The cooling system can adjust different coolant temperatures according to different target experimental conditions, so as to achieve precise control of the fuel temperature in the injector.
Description
Technical Field
The invention relates to the research fields of basic combustion, power machinery spray combustion and the like, in particular to a fuel injector cooling system for a spray combustion experiment in a combustion bomb.
Background
With the global energy crisis and the aggravated influence of environmental pollution, the research of the spray combustion process of the engine is strengthened, and the method is particularly important for improving the combustion process of the engine and reducing the pollutant emission; due to the complex shape of the combustion chamber and the dynamic working condition environment in the engine, the research of the spray combustion in the engine is difficult. Therefore, many researchers first develop the characteristics of spray combustion in a static working condition environment by using a combustion bomb. However, in the current research, the fuel temperature has a great influence on the spray combustion process, such as the ignition delay period, the flame floating length, the soot content and the like, and when numerical simulation and calculation analysis are performed later, the fuel temperature is an important influence factor for input, the input is uncontrollable, and the output result has a high error. Therefore, the fuel temperature is controllable, and the optical experiment result in the combustion bomb is more reliable, so that the effective control of the fuel temperature of the fuel injector is very important for researching the spray combustion process of the engine.
Disclosure of Invention
In order to solve the problem that the temperature of an oil sprayer body and the temperature of fuel oil are uncontrollable in the spray combustion experiment process based on a combustion bomb, the invention provides a set of cooling system which can adjust different temperatures of cooling liquid according to different target experiment working conditions, thereby realizing the accurate control of the temperature of the fuel oil in the oil sprayer.
The technical purpose is realized by the following technical means:
a fuel injector cooling system for spray combustion experiments in combustion bombs comprises a fuel injector cooling water jacket, a coolant tank, a coolant inlet pipeline, a coolant outlet pipeline, a coolant pump and a temperature sensor; the oil sprayer cooling water jacket is arranged on the outer side of the oil sprayer, and the oil sprayer is fixed in the middle of the oil sprayer cooling water jacket through a clamp; a cooling liquid cavity formed by a fuel injector cap, a support ring and a fuel injector assembling cover is arranged in the fuel injector cooling water jacket; and a cooling liquid inlet pipeline and a cooling liquid outlet pipeline are respectively arranged at the inlet and the outlet of the cooling water jacket of the oil sprayer.
Furthermore, the cooling water jacket of the oil sprayer is arranged in the combustion bomb, and the whole spray combustion experiment is carried out in a closed environment in the combustion bomb.
Furthermore, a cooling liquid flow channel is formed in the cooling water jacket of the oil sprayer and communicated with the lower portion of the cooling liquid cavity.
Furthermore, a sealing groove is respectively arranged at the contact position of the fuel injector cooling water jacket and the fuel injector cap, the contact position of the fuel injector cap and the nozzle, and the contact position of the fuel injector assembly cover and the fuel injector.
Further, the cooling liquid inlet pipeline is connected with a cooling liquid pump.
Furthermore, the cooling liquid inlet pipeline and the cooling liquid outlet pipeline are both provided with temperature sensors to measure and display the temperature of the inlet and outlet cooling liquid.
Further, the fuel injector cap is of a hollow inverted cone-shaped revolving body structure; and the oil sprayer cap is provided with a plurality of round through holes.
Further, cooling liquid is filled in the cooling liquid inlet pipeline and the cooling liquid outlet pipeline; the coolant tank supplies coolant to can be according to the difference of target experiment operating mode, adjust coolant temperature.
Furthermore, different temperatures of the cooling liquid can be adjusted in the cooling liquid tank according to different target experiment working conditions, and when the difference between the temperatures shown by the two temperature sensors is less than 2 ℃, the fuel temperature is in a stable state.
Further, the fuel injector cap is made of an aluminum material.
Has the advantages that:
the fuel injector cooling system for the spray combustion experiment in the combustion bomb is simple to control, different cooling liquid temperatures can be adjusted according to different target experiment working conditions, so that the accurate control of the fuel temperature in the fuel injector is realized, and if the temperature difference shown by the two temperature sensors is less than 2 ℃, the fuel temperature is in a stable state. The static error of the fuel temperature is controlled within a reasonable range of 2 ℃, and the control precision is high.
Drawings
FIG. 1 is a cross-sectional view of the overall configuration of a fuel injector cooling system for a spray combustion experiment in a combustion bomb in accordance with the present invention;
FIG. 2 is a partial structural cross-sectional view of the cooling jacket of the fuel injector of FIG. 1 in accordance with the present invention.
The reference numbers are as follows:
1. a cooling water jacket of the oil injector; 2. a coolant flow passage; 3. a cooling fluid chamber; 4. a sealing groove; 5. a fuel injector cap; 6. a support ring; 7. assembling a cover of the oil sprayer; 8. a coolant tank; 9. a coolant inlet conduit; 10. a coolant outlet conduit; 11. a coolant pump; 12. a temperature sensor.
Detailed Description
The invention is explained in further detail below with reference to the drawings.
An exemplary embodiment of the present invention is described with reference to fig. 1 and 2. The size, material, shape, relative arrangement, and the like of the respective constituent elements described in the exemplary embodiments of the present invention are not intended to limit the technical scope of the present invention to them unless otherwise specified. It will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles of the invention, the scope of which is defined in the appended claims.
Referring to the attached drawings 1 and 2, the invention relates to a fuel injector cooling system for spray combustion experiments in combustion bombs, which comprises a fuel injector cooling water jacket 1, a coolant tank 8, a coolant inlet pipeline 9, a coolant outlet pipeline 10, a coolant pump 11 and a temperature sensor 12; the oil sprayer cooling water jacket 1 is arranged on the outer side of the oil sprayer, and the oil sprayer is fixed in the middle of the oil sprayer cooling water jacket 1 through a mechanical clamp; a cooling liquid cavity 3 is formed by an oil sprayer cap 5, a support ring 6 and an oil sprayer assembling cover 7 in the oil sprayer cooling water jacket 1; an inlet and an outlet of the oil sprayer cooling water jacket 1 are respectively provided with a cooling liquid inlet pipeline 9 and a cooling liquid outlet pipeline 10, and cooling liquid is introduced into the pipelines.
With reference to fig. 2, a stepped hole is formed in a cavity of the oil injector cooling water jacket 1, an oil injector assembling cover 7, a support ring 6 and an oil injector cap 5 are respectively installed in the stepped hole from top to bottom, and the oil injector assembling cover 7, the support ring 6 and the oil injector cap 5 are in sealing contact or fixed connection; the fuel injector cap 5 is a hollow inverted cone-shaped revolving body structure, a certain gap is formed between the fuel injector cap 5 and the fuel injector cooling water jacket 1, a plurality of round through holes are formed in the fuel injector cap 5, cooling liquid in the cooling liquid flow channel 2 enters the cooling liquid cavity 3 through the round through holes formed in the fuel injector cap 5 through a cooling liquid inlet pipeline 9, meanwhile, the cooling liquid in the cooling liquid cavity 3 flows out through the round through holes formed in the fuel injector cap 5, so that the cooling liquid enters a gap between the fuel injector cap 5 and the fuel injector cooling water jacket 1, and finally flows back into the cooling liquid tank 8 through the cooling liquid inlet pipeline 9. The hollow inverted cone-shaped revolving body structure of the oil sprayer cap 5 increases the contact area of the cooling liquid and the oil sprayer cap 5, and meanwhile, the circular through holes in the oil sprayer cap 5 also increase the contact area of the cooling liquid, so that the heat at the tip of the oil sprayer is taken away quickly through the oil sprayer cap 5, and the cooling efficiency of the oil sprayer is improved.
The oil sprayer cooling water jacket 1 is of a structure that a cooling liquid flow channel 2 is formed in an entity, a hollow cooling liquid cavity 3 is reserved in the center of the entity, and a round through hole is formed in the lower portion of the entity. On one hand, the cooling liquid flow channel 2 is beneficial to the circulating flow of cooling liquid conveyed by a cooling liquid inlet pipeline 9 in the oil sprayer cooling water jacket 1, and on the other hand, a cooling liquid cavity 3 formed by an oil sprayer cap 5, a support ring 6 and an oil sprayer assembling cover 7 can enable the cooling liquid to be full of a large enough space and fully contact with the oil sprayer, so that the oil sprayer is well cooled; and a sealing groove 4 is respectively arranged at the contact part of the oil atomizer cooling water jacket 1 and the oil atomizer cap 5, the contact part of the oil atomizer cap 5 and the nozzle, and the contact part of the oil atomizer assembling cover 7 and the oil atomizer so as to install a rubber sealing ring for sealing and prevent the cooling liquid from leaking. In addition, the lower part of the fuel injector is provided with a round through hole, so that the fuel injector can conveniently pass through the round through hole, normal fuel injection is not influenced, and the subsequent combustion condition can be conveniently observed. Wherein, the material of the injector cap 5 is aluminum material.
FIG. 1 is a sectional view of the overall structure of a fuel injector cooling system for a spray combustion experiment in a combustion bomb according to the present embodiment. The fuel injector cooling water jacket 1 is arranged on the outer side of the fuel injector, and the fuel injector is fixed in the middle of the fuel injector cooling water jacket 1 made of aluminum through a mechanical clamp; the cooling liquid inlet pipeline 9 and the cooling liquid outlet pipeline 10 are both provided with temperature sensors 12 to measure and display the temperature of the cooling liquid in the pipelines; the cooling liquid tank 8 supplies cooling liquid, and different temperatures of the cooling liquid can be adjusted according to different target experiment working conditions, so that the fuel temperature is kept consistent under different experiment working conditions; the cooling liquid inlet pipeline 9 is connected with a cooling liquid pump 11; the coolant pump 11 supplies a certain flow rate of coolant from the coolant tank 8 to the coolant inlet pipe 9; the coolant in the coolant outlet line 10 flows back to the coolant tank 8.
Fig. 2 is a partial structural sectional view of a fuel injector cooling water jacket in the fuel injector cooling system for a spray combustion experiment in a combustion bomb according to the present embodiment. The fuel injector cooling water jacket 1 is arranged on the outer side of the fuel injector and is fixed on a combustion bomb experimental device, and the fuel injector is fixed in the middle of the fuel injector cooling water jacket 1 through a mechanical clamp; the two sides above the oil sprayer cooling water jacket 1 are respectively connected with a cooling liquid inlet pipeline 9 and a cooling liquid outlet pipeline 10, a cooling liquid flow channel 2 is formed in the cooling water jacket, cooling liquid enters the cooling liquid flow channel 2 through the cooling liquid inlet pipeline 9, and then enters a cooling liquid cavity 3 formed by an oil sprayer cap 5, a support ring 6 and an oil sprayer assembling cover 7 through six holes formed in the oil sprayer cap 5 to fully contact with an oil sprayer, so that a good cooling effect on the oil sprayer is realized; the fuel injector cap 5 is made of aluminum, so that heat can be better transferred between the nozzle and the cooling liquid, and the cooling effect is enhanced; the contact part of the oil atomizer cooling water jacket 1 and the oil atomizer cap 5, the contact part of the oil atomizer cap 5 and the nozzle, and the contact part of the oil atomizer assembly cover 7 and the oil atomizer are respectively provided with a sealing groove 4 for installing a rubber sealing ring for sealing so as to prevent cooling liquid from leaking; the lower part of the oil sprayer cooling water jacket 1 is provided with a round through hole so as to facilitate the oil sprayer to pass through, not influence normal oil spraying and facilitate the follow-up observation of the combustion condition.
The working principle is as follows: the spray combustion experiment is carried out by using the combustion bomb, different target working conditions exist, the influence of different working conditions on the fuel temperature is different, different fuel temperatures also have different influences on the spray combustion experiment, and therefore the fuel temperature is ensured to be consistent under all experimental working conditions. Before the spray combustion experiment is carried out, firstly, the fuel injector is calibrated under the target experiment working condition. Namely, a blank fuel injector without spray orifices is used for a calibration experiment, a thermocouple is installed in the fuel injector, fuel is put in the fuel injector, different temperatures of cooling liquid are adjusted through a cooling liquid box 8 under the working condition of a target experiment, when the temperature measured by the thermocouple reaches the target fuel temperature, and the difference between the temperatures of inlet and outlet cooling liquids measured and displayed by temperature sensors 12 on a cooling liquid inlet pipeline 9 and a cooling liquid outlet pipeline 10 is less than 2 ℃, the fuel temperature is considered to reach a stable state, the fuel temperature at the moment is also the average value of the temperature difference, and the temperature of the cooling liquid at the moment is recorded. And then changing different experimental working conditions, and carrying out the calibration experiment again to obtain the corresponding relation between the temperature of the cooling liquid and the experimental working conditions when the temperatures of the fuel oil are consistent. Then the blank fuel injector is replaced by a real fuel injector connected with a high-pressure common rail, and then the temperature of the cooling liquid corresponding to different target experiment working conditions can be adjusted through the cooling liquid box 8, so that the spray combustion experiment is carried out.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (7)
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| CN201910342129.3A CN110173382B (en) | 2019-04-26 | 2019-04-26 | Oil sprayer cooling system for spray combustion experiment in combustion bomb |
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| CN201910342129.3A CN110173382B (en) | 2019-04-26 | 2019-04-26 | Oil sprayer cooling system for spray combustion experiment in combustion bomb |
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| CN110173382A CN110173382A (en) | 2019-08-27 |
| CN110173382B true CN110173382B (en) | 2021-09-10 |
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| CN113702874A (en) * | 2021-07-28 | 2021-11-26 | 广东电网有限责任公司广州供电局 | Water bath type liquid level stabilizing pool fire burner used as external fire source of transformer |
| CN115165379A (en) * | 2022-03-16 | 2022-10-11 | 邵阳学院 | Portable detachable constant-volume combustion bomb device |
| CN114810442A (en) * | 2022-04-11 | 2022-07-29 | 哈尔滨工程大学 | Fuel injector cooling device and method based on constant volume bomb high-temperature experiment |
| CN115754117B (en) * | 2022-07-08 | 2025-03-14 | 江苏大学 | High-quality biodiesel combustion performance evaluation system |
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| JP2002070686A (en) * | 2000-08-30 | 2002-03-08 | Yanmar Diesel Engine Co Ltd | Fuel injection valve for internal combustion engine and disassembling tool therefor |
| CN103917755A (en) * | 2011-11-09 | 2014-07-09 | 罗伯特·博世有限公司 | Dosing module |
| CN103953454A (en) * | 2014-04-03 | 2014-07-30 | 中国北方发动机研究所(天津) | Water cavity structure of air cylinder cover of internal combustion engine |
| CN104819850A (en) * | 2015-03-27 | 2015-08-05 | 天津大学 | Constant-volume firebomb system for simulating combustion of engine |
| CN106932202A (en) * | 2017-05-19 | 2017-07-07 | 堀场仪器（上海）有限公司 | A kind of Temperature-controlled appliance for being applied to engine test |
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Patent Citations (5)
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|---|---|---|---|---|
| JP2002070686A (en) * | 2000-08-30 | 2002-03-08 | Yanmar Diesel Engine Co Ltd | Fuel injection valve for internal combustion engine and disassembling tool therefor |
| CN103917755A (en) * | 2011-11-09 | 2014-07-09 | 罗伯特·博世有限公司 | Dosing module |
| CN103953454A (en) * | 2014-04-03 | 2014-07-30 | 中国北方发动机研究所(天津) | Water cavity structure of air cylinder cover of internal combustion engine |
| CN104819850A (en) * | 2015-03-27 | 2015-08-05 | 天津大学 | Constant-volume firebomb system for simulating combustion of engine |
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