CN117404685A - Multi-mode oil injection rod of stress application or stamping combustion chamber - Google Patents
Multi-mode oil injection rod of stress application or stamping combustion chamber Download PDFInfo
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- CN117404685A CN117404685A CN202311273997.3A CN202311273997A CN117404685A CN 117404685 A CN117404685 A CN 117404685A CN 202311273997 A CN202311273997 A CN 202311273997A CN 117404685 A CN117404685 A CN 117404685A
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- oil
- cylinder
- piston
- oil inlet
- rod
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 26
- 238000002347 injection Methods 0.000 title claims abstract description 16
- 239000007924 injection Substances 0.000 title claims abstract description 16
- 239000000446 fuel Substances 0.000 claims abstract description 35
- 239000007921 spray Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000005192 partition Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a multi-mode oil injection rod of a forced or stamping combustion chamber, which comprises an oil supply pipe, a piston cylinder, a return spring, a shell, a piston rod and a valve core; the shell comprises an oil inlet cylinder, a connecting cylinder, a divergent cylinder, an oil outlet cylinder and a spray rod. A first oil passage and a second oil passage are formed in the housing. The fuel is supplied into the fuel inlet cylinder through the fuel supply port, and the opening and closing of the inlets of the first oil way and the second oil way are controlled by adjusting the fuel supply pressure and the up-down displacement of the piston, so that different fuel supply modes are realized under different fuel supply pressures. According to the invention, three oil supply modes are realized through one oil injection rod, so that an oil supply system of a forced or stamping combustion chamber is greatly simplified, the structural weight is reduced, and the oil supply requirements of the combustion chamber under different working conditions are met.
Description
Technical Field
The invention relates to the technical field of novel oil supply systems of afterburners or ramjet combustors, and aims to improve the combustion performance of the afterburners or ramjet combustors, and the novel oil supply systems are mainly used as oil supply devices of the afterburners or ramjet combustors of aeroengines and can also be used in other combustors such as interstage combustors and gas turbine combustors.
Technical Field
The fuel rod design of an afterburner is one of the key things in afterburner design, as the fuel supply to the afterburner directly affects the combustion performance of the combustor. The design of the afterburner or ramjet fuel rod must meet the requirements that the distribution of fuel in the afterburner or ramjet is in an optimal state when operating at full conditions, thereby achieving optimal combustion performance and meeting combustor design criteria. And still can have good fuel distribution characteristics and combustion efficiency when operating in a small state. In addition, the oil supply device also needs to ensure that the afterburner or the ram combustor has good transition state performance, and can ensure that the combustor reliably works and does not flameout when the small state and the large state are switched. At present, in the design of an oil supply system, a partition oil supply mode is mainly adopted, and the design requirement of a stress application or punching combustion chamber is met.
The idea of the zoned oil supply is to divide the whole combustion chamber into a plurality of zones, and each zone supplies oil to the zone by arranging oil supply devices such as oil injection rods and the like. When the combustion chamber is operating in a small state, only a few areas are supplied with oil. Therefore, although the fuel supply amount in the small state of the combustion chamber is small, the fuel supply is relatively concentrated, so that the local fuel concentration can be ensured to be maintained at a level favorable for combustion. In addition, the local fuel supply can prevent the fuel supply pressure from being too low, thereby improving the penetration depth of the fuel and the blending degree with the air, and being beneficial to improving the combustion performance. When the working state of the afterburner or the stamping combustor is gradually increased, each area gradually participates in the oil supply link of the combustor according to the design rule, so that the oil gas distribution in the combustor is always at a better level in the process of excessive state, and the higher combustion performance is maintained.
Currently, partition oil supply is mainly divided into annular partition oil supply, fan-shaped partition oil supply and combined partition oil supply. However, in either form of zone fuel supply, a plurality of fuel injection rods or fuel supply devices are required to be arranged so as to meet the requirements of fuel supply positions in the fuel supply of different zones. This clearly increases the complexity of the oil supply system as a whole and increasing the number of oil supply devices also increases the overall weight of the afterburner or ram. It is therefore highly desirable to provide improvements to the thrust or ram combustor fuel rail so that one fuel rail can meet multiple fuel delivery patterns. Therefore, under the condition of reducing the number of the oil injection rods, the oil supply requirements of the combustion chamber under different working conditions are met, the oil supply system of the afterburner or stamping combustion chamber is simplified, and the structural weight is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a multi-mode fuel injection rod of a forced or stamping combustion chamber aiming at the design challenges related to the background technology.
The invention adopts the following technical scheme for solving the technical problems:
a multi-mode fuel injection rod of a forced or stamped combustion chamber comprises a fuel supply pipe, a piston cylinder, a reset spring, a shell, a piston rod and a valve core;
the piston cylinder is a hollow cylinder with the upper end closed and the lower end open;
the shell comprises an oil inlet cylinder, a connecting cylinder, a divergent cylinder, an oil outlet cylinder and a spray rod, wherein the oil inlet cylinder is a hollow cylinder with an opening at the upper end and a first connecting hole at the center of the lower end, the connecting cylinder is a hollow cylinder with two openings at the two ends, the divergent cylinder is a hollow round table with two openings at the two ends, the oil outlet cylinder is a hollow cylinder with a second connecting hole at the opening at the upper end and the center of the lower end, and the spray rod is a hollow cylinder with two openings at the two ends; one end of the connecting cylinder is coaxially and hermetically connected with the first connecting hole of the oil inlet cylinder, and the other end of the connecting cylinder is coaxially and hermetically connected with the end with smaller area of the diverging cylinder; the end with larger area of the divergent cylinder is coaxially and hermetically fixedly connected with the upper end of the oil outlet cylinder; the oil outlet cylinder is coaxially and hermetically fixedly connected with one end of the spray rod at the second connecting hole of the oil outlet cylinder;
the inner diameter of the oil inlet cylinder is the same as that of the piston cylinder, and the opening end of the piston cylinder is coaxially and hermetically fixedly connected with the opening end of the oil inlet cylinder;
an annular bulge is arranged on the inner wall of the oil inlet cylinder;
the piston is arranged in the piston cylinder; one end of the return spring is fixedly connected with the closed end of the piston cylinder, and the other end of the return spring is fixedly connected with the piston cylinder in a compressed state; the piston can freely slide between the piston cylinder and the annular bulge of the closed end and the oil inlet cylinder, and the piston is sealed with the inner walls of the piston cylinder and the oil inlet cylinder;
the valve core is in a truncated cone shape and is arranged in the diverging cylinder, the slope is the same as that of the diverging cylinder, and the diameter of the end face with larger area is larger than the inner diameter of the connecting cylinder and smaller than the diameter of the end face of the piston;
the piston rod is arranged between the piston and the valve core, one end of the piston rod is coaxially fixedly connected with the piston, and the other end of the piston rod is coaxially fixedly connected with one end of the valve core with smaller area;
the side wall of the oil inlet cylinder between the annular bulge and one end of the oil inlet cylinder provided with the first connecting hole is provided with an oil inlet through hole; one end of the oil supply pipe is connected with external oil, and the other end of the oil supply pipe is connected with an oil inlet through hole of the oil inlet cylinder in a sealing manner; a first oil way is formed between the oil inlet through hole of the oil inlet cylinder and one end of the spray rod, which is far away from the oil outlet cylinder;
the oil inlet is arranged on the inner wall between the opening end of the oil inlet cylinder and the annular bulge, the end face of the spray rod, which is far away from one end of the oil outlet cylinder, is provided with an oil outlet, a channel is arranged between the oil inlet and the oil outlet in the shell, and a second oil way is formed between the oil inlet and the oil outlet;
when the oil supply pressure of the oil supply pipe is larger than zero and smaller than a preset first oil pressure P1, the piston abuts against the annular bulge to block the oil inlet, the side wall of the valve core is not attached to the inner wall of the diverging part, and at the moment, the first oil way is smooth, and the second oil way is closed;
when the oil supply pressure is larger than a preset first oil pressure P1 and smaller than a preset second oil pressure P2, the piston compresses the reset spring to move, the oil inlet is communicated with the first oil way, the side wall of the valve core is not attached to the inner wall of the diverging part, and at the moment, the first oil way is smooth, and the second oil way is also smooth;
when the oil supply pressure is greater than a preset second oil pressure P2, the piston continues to compress the return spring to move, the oil inlet is communicated with the first oil way, the side wall of the valve core is attached and sealed with the inner wall of the diverging part, and at the moment, the first oil way is sealed and the second oil way is unblocked.
As a further optimization scheme of the multi-mode oil injection rod of the stress application or stamping combustion chamber, the oil inlet and the oil outlet are annular.
As a further optimization scheme of the multi-mode oil injection rod of the stress application or stamping combustion chamber, the oil inlet and the oil outlet are both blind holes.
Compared with the prior art, the technical scheme provided by the invention has the following technical effects:
1. three oil supply modes are realized through one oil injection rod, so that an oil supply system of a boost or stamping combustion chamber is greatly simplified, the structural weight of the oil supply system is lightened, and the oil supply requirements of the combustion chamber under different working conditions are met.
2. The invention has simple structure, excellent performance and easy realization in technology.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is an enlarged schematic view of a portion of the structure of the present invention;
FIG. 4 is a schematic diagram of fuel flow when the first oil passage is open and the second oil passage is closed;
FIG. 5 is a schematic diagram of fuel flow when the first oil path is unblocked and the second oil path is unblocked;
fig. 6 is a schematic diagram of the fuel flow when the first oil passage is closed and the second oil passage is open.
In the figure, the oil supply port is 1-, the piston rod is 2-, the return spring is 3-, the first oil way is 4-, the second oil way is 5-, the oil inlet cylinder is 6-and the annular bulge is 7-.
Description of the embodiments
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings:
this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1 and 2, the invention discloses a multi-mode oil injection rod of a forced or stamping combustion chamber, which comprises an oil supply pipe, a piston cylinder, a return spring, a shell, a piston rod and a valve core;
the piston cylinder is a hollow cylinder with the upper end closed and the lower end open;
the shell comprises an oil inlet cylinder, a connecting cylinder, a divergent cylinder, an oil outlet cylinder and a spray rod, wherein the oil inlet cylinder is a hollow cylinder with an opening at the upper end and a first connecting hole at the center of the lower end, the connecting cylinder is a hollow cylinder with two openings at the two ends, the divergent cylinder is a hollow round table with two openings at the two ends, the oil outlet cylinder is a hollow cylinder with a second connecting hole at the opening at the upper end and the center of the lower end, and the spray rod is a hollow cylinder with two openings at the two ends; one end of the connecting cylinder is coaxially and hermetically connected with the first connecting hole of the oil inlet cylinder, and the other end of the connecting cylinder is coaxially and hermetically connected with the end with smaller area of the diverging cylinder; the end with larger area of the divergent cylinder is coaxially and hermetically fixedly connected with the upper end of the oil outlet cylinder; the oil outlet cylinder is coaxially and hermetically fixedly connected with one end of the spray rod at the second connecting hole of the oil outlet cylinder;
the inner diameter of the oil inlet cylinder is the same as that of the piston cylinder, and the opening end of the piston cylinder is coaxially and hermetically fixedly connected with the opening end of the oil inlet cylinder;
an annular bulge is arranged on the inner wall of the oil inlet cylinder;
the piston is arranged in the piston cylinder; one end of the return spring is fixedly connected with the closed end of the piston cylinder, and the other end of the return spring is fixedly connected with the piston cylinder in a compressed state; the piston can freely slide between the piston cylinder and the annular bulge of the closed end and the oil inlet cylinder, and the piston is sealed with the inner walls of the piston cylinder and the oil inlet cylinder;
the valve core is in a truncated cone shape and is arranged in the diverging cylinder, the slope is the same as that of the diverging cylinder, and the diameter of the end face with larger area is larger than the inner diameter of the connecting cylinder and smaller than the diameter of the end face of the piston;
the piston rod is arranged between the piston and the valve core, one end of the piston rod is coaxially fixedly connected with the piston, and the other end of the piston rod is coaxially fixedly connected with one end of the valve core with smaller area;
the side wall of the oil inlet cylinder between the annular bulge and one end of the oil inlet cylinder provided with the first connecting hole is provided with an oil inlet through hole; one end of the oil supply pipe is connected with external oil, and the other end of the oil supply pipe is connected with an oil inlet through hole of the oil inlet cylinder in a sealing manner; a first oil way is formed between the oil inlet through hole of the oil inlet cylinder and one end of the spray rod, which is far away from the oil outlet cylinder;
the oil inlet is arranged on the inner wall between the opening end of the oil inlet cylinder and the annular bulge, the end face of the spray rod, which is far away from one end of the oil outlet cylinder, is provided with an oil outlet, a channel is arranged between the oil inlet and the oil outlet in the shell, and a second oil way is formed between the oil inlet and the oil outlet;
when the oil supply pressure of the oil supply pipe is larger than zero and smaller than a preset first oil pressure P1, the piston abuts against the annular bulge to block the oil inlet, the side wall of the valve core is not attached to the inner wall of the diverging part, and at the moment, the first oil way is smooth, and the second oil way is closed;
when the oil supply pressure is larger than a preset first oil pressure P1 and smaller than a preset second oil pressure P2, the piston compresses the reset spring to move, the oil inlet is communicated with the first oil way, the side wall of the valve core is not attached to the inner wall of the diverging part, and at the moment, the first oil way is smooth, and the second oil way is also smooth;
when the oil supply pressure is greater than a preset second oil pressure P2, the piston continues to compress the return spring to move, the oil inlet is communicated with the first oil way, the side wall of the valve core is attached and sealed with the inner wall of the diverging part, and at the moment, the first oil way is sealed and the second oil way is unblocked.
The oil inlet and the oil outlet can be in various shapes, the second oil way can also be correspondingly arranged, and when the oil inlet and the oil outlet are annular, the shell is hollow except for the oil inlet through hole; when the oil inlet and the oil outlet are both blind holes, the second oil way is in a pipeline shape.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (3)
1. The multi-mode fuel injection rod of the forced or stamped combustion chamber is characterized by comprising a fuel supply pipe, a piston cylinder, a return spring, a shell, a piston rod and a valve core;
the piston cylinder is a hollow cylinder with the upper end closed and the lower end open;
the shell comprises an oil inlet cylinder, a connecting cylinder, a divergent cylinder, an oil outlet cylinder and a spray rod, wherein the oil inlet cylinder is a hollow cylinder with an opening at the upper end and a first connecting hole at the center of the lower end, the connecting cylinder is a hollow cylinder with two openings at the two ends, the divergent cylinder is a hollow round table with two openings at the two ends, the oil outlet cylinder is a hollow cylinder with a second connecting hole at the opening at the upper end and the center of the lower end, and the spray rod is a hollow cylinder with two openings at the two ends; one end of the connecting cylinder is coaxially and hermetically connected with the first connecting hole of the oil inlet cylinder, and the other end of the connecting cylinder is coaxially and hermetically connected with the end with smaller area of the diverging cylinder; the end with larger area of the divergent cylinder is coaxially and hermetically fixedly connected with the upper end of the oil outlet cylinder; the oil outlet cylinder is coaxially and hermetically fixedly connected with one end of the spray rod at the second connecting hole of the oil outlet cylinder;
the inner diameter of the oil inlet cylinder is the same as that of the piston cylinder, and the opening end of the piston cylinder is coaxially and hermetically fixedly connected with the opening end of the oil inlet cylinder;
an annular bulge is arranged on the inner wall of the oil inlet cylinder;
the piston is arranged in the piston cylinder; one end of the return spring is fixedly connected with the closed end of the piston cylinder, and the other end of the return spring is fixedly connected with the piston cylinder in a compressed state; the piston can freely slide between the piston cylinder and the annular bulge of the closed end and the oil inlet cylinder, and the piston is sealed with the inner walls of the piston cylinder and the oil inlet cylinder;
the valve core is in a truncated cone shape and is arranged in the diverging cylinder, the slope is the same as that of the diverging cylinder, and the diameter of the end face with larger area is larger than the inner diameter of the connecting cylinder and smaller than the diameter of the end face of the piston;
the piston rod is arranged between the piston and the valve core, one end of the piston rod is coaxially fixedly connected with the piston, and the other end of the piston rod is coaxially fixedly connected with one end of the valve core with smaller area;
the side wall of the oil inlet cylinder between the annular bulge and one end of the oil inlet cylinder provided with the first connecting hole is provided with an oil inlet through hole; one end of the oil supply pipe is connected with external oil, and the other end of the oil supply pipe is connected with an oil inlet through hole of the oil inlet cylinder in a sealing manner; a first oil way is formed between the oil inlet through hole of the oil inlet cylinder and one end of the spray rod, which is far away from the oil outlet cylinder;
the oil inlet is arranged on the inner wall between the opening end of the oil inlet cylinder and the annular bulge, the end face of the spray rod, which is far away from one end of the oil outlet cylinder, is provided with an oil outlet, a channel is arranged between the oil inlet and the oil outlet in the shell, and a second oil way is formed between the oil inlet and the oil outlet;
when the oil supply pressure of the oil supply pipe is larger than zero and smaller than a preset first oil pressure P1, the piston abuts against the annular bulge to block the oil inlet, the side wall of the valve core is not attached to the inner wall of the diverging part, and at the moment, the first oil way is smooth, and the second oil way is closed;
when the oil supply pressure is larger than a preset first oil pressure P1 and smaller than a preset second oil pressure P2, the piston compresses the reset spring to move, the oil inlet is communicated with the first oil way, the side wall of the valve core is not attached to the inner wall of the diverging part, and at the moment, the first oil way is smooth, and the second oil way is also smooth;
when the oil supply pressure is greater than a preset second oil pressure P2, the piston continues to compress the return spring to move, the oil inlet is communicated with the first oil way, the side wall of the valve core is attached and sealed with the inner wall of the diverging part, and at the moment, the first oil way is sealed and the second oil way is unblocked.
2. The multi-mode fuel injection rod of the afterburner or ramjet of claim 1, wherein the oil inlet and the oil outlet are annular.
3. The multi-mode fuel injection rod of the afterburner or ram of claim 1, wherein the oil inlet and the oil outlet are blind holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311273997.3A CN117404685A (en) | 2023-09-28 | 2023-09-28 | Multi-mode oil injection rod of stress application or stamping combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311273997.3A CN117404685A (en) | 2023-09-28 | 2023-09-28 | Multi-mode oil injection rod of stress application or stamping combustion chamber |
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| Publication Number | Publication Date |
|---|---|
| CN117404685A true CN117404685A (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311273997.3A Pending CN117404685A (en) | 2023-09-28 | 2023-09-28 | Multi-mode oil injection rod of stress application or stamping combustion chamber |
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| CN (1) | CN117404685A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117738797A (en) * | 2024-02-21 | 2024-03-22 | 中国航发四川燃气涡轮研究院 | Main oil way valve |
-
2023
- 2023-09-28 CN CN202311273997.3A patent/CN117404685A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117738797A (en) * | 2024-02-21 | 2024-03-22 | 中国航发四川燃气涡轮研究院 | Main oil way valve |
| CN117738797B (en) * | 2024-02-21 | 2024-04-16 | 中国航发四川燃气涡轮研究院 | Main oil way valve |
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