CN110925094A - Cooling structure of ignition device - Google Patents
Cooling structure of ignition device Download PDFInfo
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- CN110925094A CN110925094A CN201911193823.XA CN201911193823A CN110925094A CN 110925094 A CN110925094 A CN 110925094A CN 201911193823 A CN201911193823 A CN 201911193823A CN 110925094 A CN110925094 A CN 110925094A
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- joint hole
- butt joint
- runner
- cooling plate
- cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/264—Ignition
Abstract
The invention relates to a cooling structure of an ignition device, which is characterized in that a front cooling plate, a rear cooling plate and four-surface cooling cavities are arranged to form a heat insulation space for the ignition device, fuel oil cooling channels are arranged in the front cooling plate, the rear cooling plate and the four-surface cooling cavities, and fuel oil flows through the front cooling plate, the rear cooling plate and the four-surface cooling cavities to realize further heat insulation and temperature reduction of the device, so that the ignition device can still normally run in an environment of 350 degrees.
Description
Technical Field
The invention belongs to the field of engine ignition, and particularly relates to a cooling structure of an ignition device.
Background
With the continuous development of aviation industry, the requirement on the high temperature resistance of an aero-engine is more and more severe, so that an ignition device serving as an ignition source of the aero-engine also needs higher high temperature resistance. Under normal conditions, in order to meet the use requirements of an engine, the design of a component matching product meeting the temperature grade needs to be selected, but the high-temperature resistant component development, particularly a semiconductor device, always has junction temperature limitation, the normal performance parameters of the device cannot exceed the junction temperature value, the maximum junction temperature of a silicon transistor is 200 ℃, and therefore the maximum use temperature of an ignition device is limited.
Disclosure of Invention
The invention provides a cooling structure of an ignition device based on the problem of limitation of the use temperature of an engine in the prior art, achieves the effect of cooling the ignition device by adding a fuel oil cooling flow passage, and realizes the normal work of the ignition device in the temperature environment of 350 degrees.
The specific implementation content of the invention is as follows:
a cooling structure of an ignition device is connected with an oil inlet nozzle, an oil outlet nozzle, a front connector and a rear connector (23 and comprises a front cooling plate, a rear cooling plate, four-surface cooling cavities and a U-shaped functional component;
the front cooling plate comprises a front runner cover plate and a front runner panel which are fixedly attached by screws a and then welded; an oil inlet nozzle butt joint hole a, a front connector butt joint hole a and a front runner pipe butt joint hole a are formed in the binding surface of the front runner panel and the front runner cover plate; an oil inlet nozzle butt joint hole b, a front connector butt joint hole b and a front runner pipe butt joint hole b which correspond to the upper position of the front runner panel are arranged on the binding surface of the front runner cover plate and the front runner panel; a front runner is also arranged on the binding surface of the front runner panel and the front runner cover plate; after the front runner panel is welded and attached to the front runner cover plate, the front runner and the front runner cover plate form a front runner pipe, the oil inlet nozzle butt joint hole a and the oil inlet nozzle butt joint hole b form an oil inlet nozzle butt joint hole connected with an oil inlet nozzle, the front connector butt joint hole a and the front connector butt joint hole b form a front connector butt joint hole connected with a front connector, and the front runner pipe butt joint hole a and the front runner pipe butt joint hole b form a front runner pipe butt joint hole; the front runner pipe butt joint hole and the oil inlet nozzle butt joint hole are communicated and connected through a front runner pipe;
the four-side cooling cavity comprises an upper cooling plate, a lower cooling plate, a left cooling plate and a right cooling plate; flow channel pipes are arranged in the upper cooling plate, the lower cooling plate, the left cooling plate and the right cooling plate; the front side of the four-side cooling cavity is welded with the front cooling plate in a seamless mode, and the joint surface of the front runner panel and the front runner cover plate faces the direction outside the four-side cooling cavity; the runner pipe is connected with a front runner pipe in the front cooling plate through a front runner pipe butt joint hole to form a through pipeline;
the U-shaped functional component is arranged in the four-side cooling cavity;
the rear cooling plate comprises a rear runner cover plate and a rear runner panel, and the rear runner cover plate and the rear runner panel are fixed by screws b and are welded and attached together; an oil outlet nozzle butt joint hole a, a rear connector butt joint hole a and a rear runner pipe butt joint hole a are formed in the binding surface of the rear runner panel and the rear runner cover plate; an oil inlet nozzle butt joint hole b, a rear connector butt joint hole b and a rear runner pipe butt joint hole b which correspond to the upper position of the rear runner panel are arranged on the binding surface of the rear runner cover plate and the rear runner panel; a rear runner is also arranged on the binding surface of the rear runner panel and the rear runner cover plate; after the rear runner panel is welded and attached to the rear runner cover plate, the rear runner and the rear runner cover plate form a rear runner pipe, the oil outlet nozzle butt-joint hole a and the oil outlet nozzle butt-joint hole b form an oil outlet nozzle butt-joint hole connected with the deodorant layer oil nozzle, the rear connector butt-joint hole a and the rear connector butt-joint hole b form a rear connector butt-joint hole connected with the rear connector, and the rear runner pipe butt-joint hole a and the rear runner pipe butt-joint hole b form a rear runner pipe butt-joint hole; the rear runner pipe butt joint hole and the oil outlet nozzle butt joint hole are communicated and connected through a rear runner pipe; the rear cooling plate is welded with the rear sides of the four-side cooling cavities in a seamless mode, and the binding surface of the rear runner panel and the rear runner cover plate faces the direction outside the four-side cooling cavities; the runner pipe and a rear runner pipe in the rear cooling plate are connected through a rear runner pipe butt joint hole to form a through pipeline.
In order to better realize the invention, further, a screw c is arranged at the welding position of the front cooling plate, the rear cooling plate and the four-side cooling cavity, and an aluminum plug and high-temperature heat-resistant thread glue are arranged on the screw c; and the front cooling plate, the rear cooling plate and the four-surface cooling cavity are welded by laser.
In order to better implement the invention, the device further comprises a mounting ear; the mounting lugs are mounted on two sides of the lower cooling plate.
In order to better realize the invention, the invention further comprises a heat insulation plate and an outer mask;
the heat insulation plate is of a hollow annular plate structure and is attached to the front cooling plate, the rear cooling plate, the upper cooling plate, the lower cooling plate, the left cooling plate and the right cooling plate; the heat insulation plates arranged on the left cooling plate and the right cooling plate are provided with notches with the same size and shape as the corresponding mounting lugs at the positions corresponding to the mounting lugs;
the outer mask is fixedly arranged on the outer surface of the heat insulation plate and forms a heat dissipation space with a gap in the middle of the heat insulation plate with the annular plate structure; notches with the same shape and size as the oil inlet nozzle butt-joint hole and the front connector butt-joint hole are arranged at the positions corresponding to the oil inlet nozzle butt-joint hole and the front connector butt-joint hole of the outer mask plate attached to one side of the front cooling plate; the outer mask plate adhered to one side of the back cooling plate is provided with notches in the same shape and size as the oil outlet nozzle butt-joint hole and the back connector butt-joint hole in the positions corresponding to the oil outlet nozzle butt-joint hole and the back connector butt-joint hole.
In order to better realize the invention, further, the U-shaped functional component comprises a U-shaped shell and an electrical functional component;
the electrical functional component is fixedly arranged on the U-shaped shell; and the left side wall and the right side wall of the U-shaped shell are respectively and correspondingly fixed on the inner side surfaces of the left cooling plate and the right cooling plate of the four-side cooling cavity by screws d.
In order to better realize the invention, further, the device also comprises a spring washer and a flat washer; and the spring washer, the flat washer and the screws d on the two side walls of the U-shaped shell are installed in a matched mode, and high-temperature heat-resistant thread glue is arranged on the screws d.
In order to better realize the invention, further, the welding between the front runner cover plate and the front runner panel is vacuum brazing; the welding between the rear runner cover plate and the rear runner panel is vacuum brazing.
To better implement the present invention, further, a sealing gasket is further included, the sealing gasket being mounted in the front connector mating hole.
Drawings
FIG. 1 is a schematic view of a front cooling plate structure;
FIG. 2 is a schematic view of the front cooling plate and front connector mounting;
FIG. 3 is a schematic diagram of the structure of the rear cooling plate;
FIG. 4 is a schematic view of the rear cooling plate and rear connector installation;
FIG. 5 is a left side view of a four-sided cooling cavity;
FIG. 6 is a front view of a four-sided cooling cavity;
FIG. 7 is a schematic structural diagram of a new U-function module;
FIG. 8 is a schematic view of the installation of the U-shaped functional assembly and the four-sided cooling cavity;
FIG. 9 is a schematic view of the connection structure of an oil inlet nozzle, an oil inlet nozzle butt hole, a forward flow pipeline, a forward flow channel pipe butt hole, a flow channel pipe, a rear flow channel pipe butt hole, an oil outlet nozzle butt hole, and an oil outlet nozzle;
FIG. 10 is a schematic view of the installation of the outer skin panel and the insulation panel;
FIG. 11 is a schematic view of the overall structure of the present invention;
FIG. 12 is a table of jet fuel characteristics under simulation;
FIG. 13 is a schematic representation of the physical properties of insulation material FRATHERNIT SG under simulation;
FIG. 14 is a graph of results of meshing under simulation;
FIG. 15 is a schematic view of liquid parameters under simulation;
FIG. 16 is a parameter diagram of simulated lower insulation;
FIG. 17 is a graph of heat transfer coefficient parameters under simulation;
FIG. 18 is a schematic diagram of flow channel inlet/outlet temperature parameters under simulation of an inlet flow rate of 0.3644Kg/s under simulation;
FIG. 19 is a schematic diagram of flow channel inlet/outlet pressure parameters under simulation with an inlet flow rate of 0.3644Kg/s under simulation;
FIG. 20 is a flow parameter diagram of a flow channel inlet/outlet under simulation of an inlet flow 0.3644Kg/s under simulation;
FIG. 21 is a schematic diagram of flow channel inlet and outlet temperature parameters under simulation with inlet flow of 0.4009Kg/s under simulation;
FIG. 22 is a schematic diagram of flow channel inlet/outlet pressure parameters under simulation with an inlet flow rate of 0.4009Kg/s under simulation;
FIG. 23 is a flow parameter diagram of a flow channel inlet/outlet under simulation of an inlet flow of 0.4009Kg/s under simulation;
FIG. 24 is a simulated lower outer skin temperature cloud.
Wherein: 1. front cooling plate, 11, front runner cover plate, 112, oil inlet nozzle butt-joint holes b, 113, front connector butt-joint holes b, 114, front runner pipe butt-joint holes b, 12, front runner panel, 121, front runner, 122, oil inlet nozzle butt-joint holes a, 123, front connector butt-joint holes a, 124, front runner pipe butt-joint holes a, 13, front connectors, 14, sealing gasket, 2, rear cooling plate, 21, rear runner cover plate, 212, oil outlet nozzle butt-joint holes b, 213, rear connector butt-joint holes b, 214, rear runner pipe butt-joint holes b, 22, rear runner panel, 221, rear runner pipe, 222, oil outlet nozzle butt-joint holes a, 223, rear connector butt-joint holes a, 224, rear runner pipe butt-joint holes a, 23, rear connectors; 3. four-sided cooling cavity, 31, upper cooling plate, 32, lower cooling plate, 321, mounting lug, 33, left cooling plate, 34, right cooling plate, 5, U-shaped functional component, 51, U-shaped shell, 52, internal circuit, 6, heat insulation plate, 7 and outer mask.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and therefore should not be considered as a limitation to the scope of protection. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.
Example 1:
a cooling structure of an ignition device is connected with an oil inlet nozzle, an oil outlet nozzle, a front connector 13 and a rear connector 23, and comprises a front cooling plate 1, a rear cooling plate 2, a four-surface cooling cavity 3, a U-shaped functional assembly 5, a mounting lug 321 and a sealing gasket 14 as shown in figures 1-8;
the front cooling plate 1 comprises a front flow channel cover plate 11 and a front flow channel panel 12 which are fixedly attached by screws a and then welded; an oil inlet nozzle butt joint hole a122, a front connector butt joint hole a123 and a front runner pipe butt joint hole a124 are arranged on the binding surface of the front runner panel 12 and the front runner cover plate 11; an oil inlet nozzle butt joint hole b112, a front connector butt joint hole b113 and a front runner pipe butt joint hole b114 which correspond to the positions of the front runner panel 12 are arranged on the joint surface of the front runner cover plate 11 and the front runner panel 12; a front runner 121 is further arranged on the joint surface of the front runner panel 12 and the front runner cover plate 11; after the front runner panel 12 is welded and attached to the front runner cover plate 11, the front runner 121 and the front runner cover plate 11 form a front runner pipe, the oil inlet nozzle butt-joint hole a122 and the oil inlet nozzle butt-joint hole b112 form an oil inlet nozzle butt-joint hole connected with an oil inlet nozzle, the front connector butt-joint hole a123 and the front connector butt-joint hole b113 form a front connector butt-joint hole connected with the front connector 13, and the front runner pipe butt-joint hole a124 and the front runner pipe butt-joint hole b114 form a front runner pipe butt-joint hole; the front runner pipe butt joint hole and the oil inlet nozzle butt joint hole are communicated and connected through a front runner pipe; the sealing gasket 14 is mounted in the front connector mating hole;
the four-side cooling cavity 3 comprises an upper cooling plate 31, a lower cooling plate 32, a left cooling plate 33 and a right cooling plate 34; flow channel pipes are arranged in the upper cooling plate 31, the lower cooling plate 32, the left cooling plate 33 and the right cooling plate 34; the front side of the four-side cooling cavity 3 is welded with the front cooling plate 1 in a seamless mode, and the joint surface of the front runner panel 12 and the front runner cover plate 11 faces the direction outside the four-side cooling cavity 3; the runner pipe is connected with a front runner pipe in the front cooling plate 1 through a front runner pipe butt joint hole to form a through pipeline;
the U-shaped functional component 5 is arranged in the four-side cooling cavity 3;
the rear cooling plate 2 comprises a rear flow channel cover plate 21 and a rear flow channel panel 22, and the rear flow channel cover plate 21 and the rear flow channel panel 22 are fixed by screws b and are welded and attached together; the joint surface of the rear runner panel 22 and the rear runner cover plate 21 is provided with an oil outlet nozzle butt joint hole a222, a rear connector butt joint hole a223 and a rear runner pipe butt joint hole a 224; an oil inlet nozzle butt joint hole b222, a rear connector butt joint hole b213 and a rear runner pipe butt joint hole b214 which correspond to the positions of the rear runner panel 22 are arranged on the joint surface of the rear runner cover plate 21 and the rear runner panel 22; a rear runner 221 is further arranged on the joint surface of the rear runner panel 22 and the rear runner cover plate 21; after the rear runner panel 22 is welded and attached to the rear runner cover plate 21, the rear runner 221 and the rear runner cover plate 21 form a rear runner pipe, the oil outlet nozzle butt-joint hole a222 and the oil outlet nozzle butt-joint hole b212 form an oil outlet nozzle butt-joint hole connected with the deodorant layer oil nozzle, the rear connector butt-joint hole a223 and the rear connector butt-joint hole b213 form a rear connector butt-joint hole connected with the rear connector 23, and the rear runner pipe butt-joint hole a224 and the rear runner pipe butt-joint hole b214 form a rear runner pipe butt-joint hole; the rear runner pipe butt joint hole and the oil outlet nozzle butt joint hole are communicated and connected through a rear runner pipe; the rear cooling plate 2 is welded with the rear sides of the four-side cooling cavities 3 in a seamless mode, and the joint face of the rear runner panel 22 and the rear runner cover plate 21 faces the direction outside the four-side cooling cavities 3; the runner pipe is connected with a rear runner pipe in the rear cooling plate 3 through a rear runner pipe butt joint hole to form a through pipeline; a screw c is arranged at the welding position of the front cooling plate 1, the rear cooling plate 2 and the four-side cooling cavity 3, and an aluminum plug and high-temperature heat-resistant thread glue are arranged on the screw c; the front cooling plate 1, the rear cooling plate 2 and the four-side cooling cavity 3 are welded by laser; the mounting lugs 321 are mounted on both sides of the lower cooling plate 32; the U-shaped functional component 5 comprises a U-shaped shell 51 and an electric functional component 52;
the electrical functional component 52 is fixedly arranged on the U-shaped shell 51; the left side wall and the right side wall of the U-shaped shell 51 are respectively and correspondingly fixed on the inner side surfaces of the left cooling plate 33 and the right cooling plate 34 of the four-side cooling cavity 3 by screws d; the welding between the front runner cover plate 11 and the front runner panel 12 is vacuum brazing; the welding between the rear runner cover plate 21 and the rear runner panel 22 is vacuum brazing.
The working principle is as follows: the internal circuit 52 is an ignition device, a sealed space is formed by arranging the four-side cooling cavity 3, the front cooling plate 1 and the rear cooling plate 2, so that the ignition of high temperature outside the part of the internal circuit 52 is realized, the internal circuit 52 is fixed on the U-shaped shell 51, the internal circuit 52 is fixed in the sealed heat insulation space formed by the four-side cooling cavity 3, the front cooling plate 1 and the rear cooling plate 2 through the U-shaped shell 51, and a front connector butt joint and a rear connector butt joint are arranged on the front cooling plate 1 and the rear cooling plate 3 to realize electric connection, wherein a sealing gasket is arranged in the front connector butt joint because the front connector 13 is an insert for providing input for the internal circuit, so the sealing gasket is needed to ensure the sealing performance and the stability of insertion, and the rear connector 23 is the output end of the internal circuit 52 and does not need the sealing gasket 14; a front runner 121 is arranged on the front runner panel 12, and then is attached to the front runner cover plate to form a front runner pipe; the flow passage pipe and the rear flow passage pipe are formed in the same way, and then the oil outlet nozzle butt joint hole, the oil inlet nozzle butt joint hole, the front flow pipeline, the front flow passage pipe butt joint hole, the flow passage pipe, the rear flow passage pipe butt joint hole and the like are obtained in the front cooling plate 1 and the rear cooling plate 2 in the same way, so that a complete fuel oil passage pipe as shown in fig. 9 can be formed, fuel oil is transmitted to the front cooling plate 1 from the oil inlet nozzle, flows through the four-surface cooling cavity 3 to the rear cooling plate 3, and finally flows out from the oil outlet nozzle, the cavity is cooled, and the effect of cooling the ignition device is finally achieved.
Example 2:
on the basis of the above embodiment 1, in order to better implement the present invention, as shown in fig. 9, 10 and 11, the present invention further includes a heat insulation plate 6 and an outer covering 7;
the heat insulation plate 6 is of a hollow annular plate structure and is attached to the front cooling plate 1, the rear cooling plate 3, the upper cooling plate 31, the lower cooling plate 32, the left cooling plate 33 and the right cooling plate 34; the heat insulation plate 6 arranged on the left cooling plate 33 and the right cooling plate 34 is provided with notches with the same size and shape as the corresponding mounting lugs 321 at the positions corresponding to the mounting lugs 321;
the outer mask 7 is fixedly arranged on the outer surface of the heat insulation plate 6 and forms a heat dissipation space with a gap in the middle of the heat insulation plate 6 with an annular plate structure; notches with the same shape and size as the oil inlet nozzle butt joint hole and the front connector butt joint hole are arranged at the positions corresponding to the oil inlet nozzle butt joint hole and the front connector butt joint hole on the outer mask 7 attached to one side of the front cooling plate 1; the outer mask 7 adhered to one side of the rear cooling plate 3 is provided with notches with the same shape and size as the oil outlet nozzle butt-joint hole and the rear connector butt-joint hole at the positions corresponding to the oil outlet nozzle butt-joint hole and the rear connector butt-joint hole.
The working principle is as follows: the heat insulation plate 6 and the outer mask 7 can fully reduce the heat conduction quantity, besides, the heat insulation plate 6 is hollow inside and matched with the outer mask 7, a gap heat insulation space can be formed, and the heat radiation of the external temperature can be further reduced.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
on the basis of the above embodiment 1 or 2, in order to better implement the present invention, as shown in fig. 8, the present invention further includes a spring washer, a flat washer; the spring washer and the flat washer are installed with screws d on two side walls of the U-shaped shell 51 in a matched mode, and high-temperature heat-resistant thread glue is arranged on the screws d.
The working principle is as follows: the installation of spring washer, plain washer etc. can guarantee the holistic resistant vibration performance of U type functional unit 5, and the stability of equipment is guaranteed equally to high temperature heat-resisting thread glue.
The rest of this embodiment is the same as embodiment 1 or 2, and therefore, the description thereof is omitted.
Example 4:
on the basis of the above embodiment 1, 2 or 3, in order to better implement the present invention, as shown in fig. 12-24, further, a simulation test is performed on the product, the current analysis adopts Fluent software in ANSYS Workbench 17.2, the scheme adopts a combination of a heat insulating material, an air gap layer and a cooling flow channel, the outermost layer adopts an aluminum alloy mask, and the middle layer is a heat insulating material; the following parameters were analyzed:
the environmental temperature is +350 ℃ for long-term working time and 380 ℃ for short-term working time; the heat exchange coefficient between the air and the mask is 30W/M2-K；
The flow range of the inlet of the flow channel is 0.0391Kg/s to 1.25 Kg/s; the pressure loss is not less than 0.7 MPa; the inlet and outlet pressure is not more than 1 MPa;
the working temperature of internal devices cannot exceed 180 ℃;
the coolant is jet fuel No. 3, and the physical properties are shown in figure 11;
inlet temperature +150 ℃;
the product material is aluminum alloy 3A12-H112, and the heat conductivity coefficient is about 180W/(m.k);
the thermal insulation material adopted FRATHERNIT SG has physical properties shown in FIG. 13;
the specific analysis process is as follows: firstly, establishing a thermal simulation model, wherein a main material is aluminum alloy, carrying out grid division on a product, the grid number is 8816497, the node number is 2672144, and the average grid quality is 0.842 (the grid quality is 0 worst and 1 best); the details are shown in FIG. 14; setting the product to work in a space with the temperature of +350 ℃; forcibly dissipating heat by liquid; inlet temperature +150 ℃; the wall surface of the flow channel is smooth; the liquid adopts jet fuel No. 3 (GB 6537) and the parameters are shown in figure 15; the thermal insulation material FRATHERNIT SG is adopted, and the parameters are shown in FIG. 16; the heat transfer coefficient between the product and the outside air is 30W/M2-K, as shown in figure 17;
first, under the conditions that the inlet flow is 0.3644Kg/s and the boundary condition of the installation and fixation contact surface is 350 ℃, the temperature of the corresponding positions of 4 installation legs is higher than that of other areas according to the cloud chart of the internal device. The maximum temperature is approximately 427k (154 c) and is in a decreasing trend upward, with higher temperatures at the front and rear board connectors than at other areas. The maximum temperature is about 433k (160 ℃), and the temperature is gradually reduced inwards; a heat insulation layer is arranged between the product matrix and the outer mask plate, and the heat insulation layer slows down the heat transfer from the external temperature to the interior of the product; the installation position is also insulated through the heat insulation base plate, so that the heat conduction of the equipment installation surface to a product base body is slowed down; the cooling flow channel has a good effect on the overall heat insulation of the product; the outer layer mask is separated from the product matrix by a heat insulation layer, the outer layer mask can only transfer heat to the product matrix through the heat insulation layer and an air layer, the temperature of an inlet and an outlet of a flow channel is shown in figure 18, and the temperature rise of the inlet and the outlet is about 1 ℃; according to the analysis result, the pressure loss of the inlet and the outlet of the flow channel is about 0.688 MPa; the pressure at the inlet and outlet sections is shown in figure 19; the flow rates of the inlet and outlet of the flow channel are shown in fig. 20;
then, under the conditions that the inlet flow is 0.4009Kg/s and the boundary condition of the installation and fixation contact surface is 350 ℃, the temperature of the corresponding positions of the 4 installation supporting legs is higher than that of other areas according to the cloud chart of the internal device. The highest temperature was about 427k (154 ℃), and trended downward in a decreasing manner; as can be seen from the internal air cloud, the temperature at the front and rear board connectors is higher than in other areas; the maximum temperature is about 432k (159 ℃) and is in a descending trend inwards; only 4 mounting lugs and front and rear plate mounting connector areas are in direct contact with the outside air, so that the temperatures of the two areas are higher than those of other areas; the temperature of the mounting lug is about 442.9k (169.9 ℃); a heat insulation layer is arranged between the product matrix and the outer mask plate, and the heat insulation layer slows down the heat transfer from the external temperature to the interior of the product; the heat insulation base plate is arranged, so that the heat conduction of the equipment installation surface to a product base body is slowed down; the cooling flow channel has a good effect on the overall heat insulation of the product; the outer layer mask is separated from the product matrix by a heat insulation layer, and the outer layer mask can only transfer heat to the product matrix through the heat insulation layer and the air layer; the inlet and outlet temperatures of the flow channel, as shown in fig. 21, are about 0.95 ℃ with the inlet and outlet temperature rise; according to the analysis result, the pressure loss of the inlet and the outlet of the flow channel is about 0.825 MPa; the pressure at the inlet and outlet sections is shown in figure 22; the inlet and outlet flow rates are shown in figure 23; the simulated temperature cloud chart cannot show the actual effect in the application due to the color reasons, so that only the simulated lower outer mask temperature cloud chart in FIG. 24 is shown for reference;
from the above analysis results, it can be derived:
1. the inlet flow is 0.3644Kg/s, the boundary condition of the installation and fixation contact surface is 350 ℃, the pressure loss of the inlet and the outlet is 0.688MPa, the temperature rise of the inlet and the outlet is 1 ℃, and the highest temperature of the inner device is 154 ℃;
2. the inlet flow is 0.4009Kg/s, the boundary condition of the installation and fixation contact surface is 350 ℃, the pressure loss of an inlet and an outlet is 0.825MPa, the temperature rise of the inlet and the outlet is 0.9 ℃, and the highest temperature of an inner device is 154 ℃;
and finally, the following steps: the thermal structure design of the product meets the thermal requirement input condition;
and (3) pressure resistance test:
a) before the test, the weight of an ignition device (without a cap) is checked by an instrument with a division value not lower than 2g, and data is recorded;
b) using special equipment, firstly closing the output switch valve, introducing XX brand aviation fuel oil from an oil inlet, gradually increasing the pressure to 3MPa and keeping the pressure for 1min, and carrying out a sealing test;
c) after the test is finished, cleaning the flow channel by using compressed air to ensure that no residual fuel oil exists;
d) after the test is finished, the appearance, the functional performance and the weight of the ignition device are tested under the standard atmospheric condition of the test, the test result is qualified, and the test result passes the withstand voltage test.
Other parts of this embodiment are the same as those of embodiment 1, 2 or 3, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. A cooling structure of an ignition device is connected with an oil inlet nozzle, an oil outlet nozzle, a front connector (13) and a rear connector (23), and is characterized by comprising a front cooling plate (1), a rear cooling plate (2), a four-surface cooling cavity (3) and a U-shaped functional assembly (5);
the front cooling plate (1) comprises a front flow channel cover plate (11) and a front flow channel panel (12), wherein the front flow channel cover plate and the front flow channel panel are fixedly attached by screws a and then welded; an oil inlet nozzle butt joint hole a (122), a front connector butt joint hole a (123) and a front runner pipe butt joint hole a (124) are arranged on the joint surface of the front runner panel (12) and the front runner cover plate (11); an oil inlet nozzle butt joint hole b (112), a front connector butt joint hole b (113) and a front runner pipe butt joint hole b (114) which correspond to the upper position of the front runner panel (12) are arranged on the joint surface of the front runner cover plate (11) and the front runner panel (12); a front runner (121) is also arranged on the binding surface of the front runner panel (12) and the front runner cover plate (11); after a front runner panel (12) is welded and attached to a front runner cover plate (11), a front runner pipe is formed by the front runner (121) and the front runner cover plate (11), an oil inlet nozzle butt joint hole connected with an oil inlet nozzle is formed by an oil inlet nozzle butt joint hole a (122) and an oil inlet nozzle butt joint hole b (112), a front connector butt joint hole connected with a front connector (13) is formed by a front connector butt joint hole a (123) and a front connector butt joint hole b (113), and a front runner pipe butt joint hole is formed by a front runner pipe butt joint hole a (124) and a front runner pipe butt joint hole b (114); the front runner pipe butt joint hole and the oil inlet nozzle butt joint hole are communicated and connected through a front runner pipe;
the four-side cooling cavity (3) comprises an upper cooling plate (31), a lower cooling plate (32), a left cooling plate (33) and a right cooling plate (34); flow channel pipes are arranged in the upper cooling plate (31), the lower cooling plate (32), the left cooling plate (33) and the right cooling plate (34); the front side of the four-side cooling cavity (3) is welded with the front cooling plate (1) in a seamless mode, and the joint surface of the front runner panel (12) and the front runner cover plate (11) faces the direction outside the four-side cooling cavity (3); the runner pipe is connected with a front runner pipe in the front cooling plate (1) through a front runner pipe butt joint hole to form a through pipeline;
the U-shaped functional component (5) is arranged in the four-side cooling cavity (3);
the rear cooling plate (2) comprises a rear flow channel cover plate (21) and a rear flow channel panel (22), and the rear flow channel cover plate (21) and the rear flow channel panel (22) are fixed by screws b and are welded and attached together; an oil outlet butt joint hole a (222), a rear connector butt joint hole a (223) and a rear runner pipe butt joint hole a (224) are formed in the joint surface of the rear runner panel (22) and the rear runner cover plate (21); an oil inlet nozzle butt joint hole b (222), a rear connector butt joint hole b (213) and a rear runner pipe butt joint hole b (214) which correspond to the upper position of the rear runner panel (22) are arranged on the joint surface of the rear runner cover plate (21) and the rear runner panel (22); a rear runner (221) is also arranged on the binding surface of the rear runner panel (22) and the rear runner cover plate (21); after the rear runner panel (22) is welded and attached to the rear runner cover plate (21), the rear runner (221) and the rear runner cover plate (21) form a rear runner pipe, the oil outlet butt joint hole a (222) and the oil outlet butt joint hole b (212) form an oil outlet butt joint hole connected with a deodorant layer oil nozzle, the rear connector butt joint hole a (223) and the rear connector butt joint hole b (213) form a rear connector butt joint hole connected with the rear connector (23), and the rear runner pipe butt joint hole a (224) and the rear runner pipe butt joint hole b (214) form a rear runner pipe butt joint hole; the rear runner pipe butt joint hole and the oil outlet nozzle butt joint hole are communicated and connected through a rear runner pipe; the rear cooling plate (2) and the rear side of the four-surface cooling cavity (3) are welded in a seamless mode, and the joint surface of the rear runner panel (22) and the rear runner cover plate (21) faces the direction outside the four-surface cooling cavity (3); the runner pipe and a rear runner pipe in the rear cooling plate (3) are connected through a rear runner pipe butt joint hole to form a through pipeline.
2. The cooling structure of an ignition device according to claim 1, wherein a screw c is arranged at the welding position of the front cooling plate (1), the rear cooling plate (2) and the four-side cooling cavity (3), and an aluminum plug and high-temperature heat-resistant thread glue are arranged on the screw c; the welding of the front cooling plate (1), the rear cooling plate (2) and the four-side cooling cavity (3) is laser welding.
3. A cooling structure of an ignition device as claimed in claim 1 or 2, further comprising mounting ears (321); the mounting lugs (321) are mounted on both sides of the lower cooling plate (32).
4. A cooling structure of an ignition device according to claim 3, further comprising a heat insulating panel (6), an outer cover (7);
the heat insulation plate (6) is of a hollow annular plate structure and is attached to the front cooling plate (1), the rear cooling plate (3), the upper cooling plate (31), the lower cooling plate (32), the left cooling plate (33) and the right cooling plate (34); the heat insulation plate (6) arranged on the left cooling plate (33) and the right cooling plate (34) is provided with notches with the same size and shape as the corresponding mounting lugs (321) at the positions corresponding to the mounting lugs (321);
the outer mask (7) is fixedly arranged on the outer surface of the heat insulation plate (6) and forms a heat dissipation space with a gap in the middle of the heat insulation plate (6) with an annular plate structure; notches with the same shape and size as the oil inlet nozzle butt joint hole and the front connector butt joint hole are arranged at the positions corresponding to the positions of the oil inlet nozzle butt joint hole and the front connector butt joint hole of the outer mask (7) attached to one side of the front cooling plate (1); notches with the same shape and size as the oil outlet nozzle butt joint hole and the rear connector butt joint hole are arranged at the positions corresponding to the positions of the outer mask (7) attached to one side of the rear cooling plate (3) and the oil outlet nozzle butt joint hole and the rear connector butt joint hole.
5. A cooling structure of an ignition device according to claim 1, characterized in that said U-shaped functional block (5) comprises a U-shaped housing (51), an electrical functional block (52);
the electric functional component (52) is fixedly arranged on the U-shaped shell (51); the left side wall and the right side wall of the U-shaped shell (51) are respectively and correspondingly fixed on the inner side surfaces of a left cooling plate (33) and a right cooling plate (34) of the four-side cooling cavity (3) through screws d.
6. The cooling structure of an ignition device according to claim 5, further comprising a spring washer, a flat washer; the spring washer and the flat washer are installed with screws d on two side walls of the U-shaped shell (51) in a matched mode, and high-temperature heat-resistant thread glue is arranged on the screws d.
7. A cooling structure of an ignition device according to claim 1, wherein the welding between said front flow path cover plate (11) and said front flow path face plate (12) is vacuum brazing; the welding between the rear runner cover plate (21) and the rear runner panel (22) is vacuum brazing.
8. A cooling structure of an ignition device according to claim 1, further comprising a sealing gasket (14), wherein the sealing gasket (14) is installed in the front connector mating hole.
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| CN201911193823.XA CN110925094B (en) | 2019-11-28 | 2019-11-28 | Cooling structure of ignition device |
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| CN209278008U (en) * | 2018-11-09 | 2019-08-20 | 天津航空机电有限公司 | A kind of ignition electric nozzle |
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| JPH09266007A (en) * | 1996-03-28 | 1997-10-07 | Toshiba Corp | Fuel cell |
| WO2003073465A1 (en) * | 2002-02-28 | 2003-09-04 | Koninklijke Philips Electronics N.V. | Light engine and vehicle with light engine |
| US20140245990A1 (en) * | 2008-01-07 | 2014-09-04 | Mcalister Technologies, Llc | Method and system of thermochemical regeneration to provide oxygenated fuel, for example, with fuel-cooled fuel injectors |
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