Distributed exhaust device and method for air exhaust and underwater exhaust of multi-mode power system

Abstract

The invention provides a distributed exhaust device and method for air exhaust and underwater exhaust of a multi-mode power system, and belongs to the technical field of engine exhaust. The problem that an existing engine is single in exhaust mode is solved. The exhaust manifold comprises an inner cavity, an outer cavity, a flow guide column, a side flow guide plate, an outer cavity partition plate, an outer shell and a tail baffle from inside to outside, the outer cavity is arranged on the periphery of the inner cavity and composed of a plurality of channels distributed in the circumferential direction, the outer shell is arranged outside the outer cavity, the flow guide column is arranged at an exhaust inlet, and the flow guide column is connected with the annular wall of the inner cavity and the outer shell. The side flow guide plates are connected with the flow guide columns, when air flow enters from the exhaust inlet and is guided by the flow guide columns, the air flow continues to flow along the side flow guide plates, and a tail baffle capable of being opened and closed is installed at the tail end of the air flow channel of the outer cavity. According to the distributed exhaust method, different exhaust modes that the engine exhausts all around when flying in the air and exhausts locally when sailing underwater can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of engine exhaust, and particularly relates to a distributed exhaust device and method for air exhaust and underwater exhaust of a multi-mode power system. Background Art

[0002] With the development of aerospace technology, higher requirements are put forward for the performance and adaptability of engines. For example, power systems with amphibious capabilities or performing special underwater tasks require engines to operate stably in different environments. However, the existing engine exhaust systems are mainly designed for the air environment and are difficult to meet the special requirements of underwater exhaust.

[0003] In the air, the engine exhaust system discharges high-temperature and high-pressure gas at high speed through a specific nozzle design, generating a reaction force to push the aircraft forward. Traditional engine exhaust technologies are relatively mature, but their functions are relatively single and are often only applicable to the air working environment. This exhaust method cannot flexibly adjust the exhaust mode according to the dynamic changes of different engine operating conditions, different positions, and different environments, such as switching from air flight to underwater navigation. Therefore, an exhaust method for different exhaust requirements is needed to solve these problems.

[0004] In addition, the research on underwater exhaust of power systems is relatively less. Some existing research attempts to design special exhaust structures, but in practical applications, due to the long-term influence of underwater high pressure and water flow impact on the check valve, it is prone to failure phenomena such as poor sealing or jamming, thus reducing the reliability of the exhaust system. In addition, some research efforts are dedicated to developing active underwater exhaust systems, which assist in exhaust by adding additional pumps or compressors. However, this not only increases the complexity and cost of the system but also introduces more fault points. Therefore, it is of great significance to develop a system and method that can take into account the air and underwater exhaust requirements of power systems. Summary of the Invention

[0005] In view of this, in order to solve the problem of the single existing engine exhaust method, the present invention provides a distributed exhaust device and method for air exhaust and underwater exhaust of a multi-mode power system, which can flexibly switch the exhaust mode according to different working environments and operating condition requirements, ensuring that the engine can operate stably and efficiently under various complex conditions, especially meeting the special requirements of underwater exhaust.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A distributed exhaust device for air exhaust and underwater exhaust of a multi-mode power system includes an inner cavity, an outer cavity, a flow guiding column, side flow guiding plates, an outer cavity partition plate, a housing, and a tail baffle from inside to outside.

[0007] The outer periphery of the inner cavity is an outer cavity, which is composed of several circumferentially distributed channels. The outside of the outer cavity is a housing. The guide column is arranged at the exhaust inlet, and the guide column connects the annular wall of the inner cavity and the housing. The side guide plate is connected to the guide column. When the air flow enters from the exhaust inlet and is guided by the guide column, it will continue to flow along the side guide plate. The end of the air flow channel of the outer cavity is equipped with a tail baffle that can open and close.

[0008] Furthermore, the outer cavity is composed of sector channels evenly distributed circumferentially.

[0009] Furthermore, the channels in the outer cavity are separated by an outer cavity partition plate, and the side guide plate connects the guide column and the outer cavity partition plate.

[0010] Furthermore, the thickness of the guide column is 1.5 - 2 times the thickness of the outer cavity partition plate.

[0011] Furthermore, the tail baffle is fixed on the tail baffle positioning rod through a tail baffle mounting ring.

[0012] Furthermore, the push rod connects the cylinder and the tail baffle mounting ring, and can achieve linear reciprocation, thereby realizing the opening and closing of the tail baffle.

[0013] Furthermore, the push rod is fixed through a push rod fixing pin.

[0014] Furthermore, the push rod fixing pin and the tail baffle positioning rod are fixed through a steering shaft. There are two through holes on the cross-section of the steering shaft. The central circular hole is the position of the tail baffle positioning rod, and the eccentric circular hole is the position of the push rod fixing pin.

[0015] An exhaust method for a distributed exhaust device for air exhaust and underwater exhaust of a multi-mode power system

[0016] In the air working mode, the annular wall of the inner cavity is accurately docked with the engine exhaust port. At this time, when facing the large-flow exhaust of the power system in the air, the radial position of the exhaust tail baffle is adjusted to the maximum by using the push rod, so that the air flow cross-sectional area of the circumferentially distributed outer cavity is increased to the maximum;

[0017] Then the air flow enters from the front end of the outer cavity. When passing through the guide column, due to the structure and position setting of the guide column, the air flow is split. These split air flows accelerate along the gradually shrinking side guide plate and flow into the 4 circumferentially evenly distributed outer cavities.

[0018] Finally, the air flow is discharged into the atmosphere, completing the entire gas discharge process.

[0019] An exhaust method for a distributed exhaust device for air exhaust and underwater exhaust of a multi-mode power system

[0020] In the underwater working mode, when facing the small-flow exhaust of the power system underwater, the radial air flow starts to flow from the front end of the outer chamber. The main steam flow according to the incoming flow direction flows out along the air flow channel of the same outer chamber. The tail baffle at the end in the outer chamber where the main steam enters is in the open state, and at the same time, the tail baffles of the remaining outer chambers are all in the closed state.

[0021] Compared with the prior art, the beneficial effects of the distributed exhaust method for the air exhaust and underwater exhaust of the multi-mode power system described in the present invention are as follows:

[0022] 1. The distributed exhaust method of the present invention can achieve different exhaust modes of full-circumference exhaust during the engine's flight in the air and partial exhaust during underwater navigation.

[0023] 2. The present invention gradually reduces the cross-sectional area of the air flow channel through the designed guide columns and side guide plates to accelerate the air flow in each exhaust channel.

[0024] 3. Through the specially designed method for opening and closing the tail baffle, the exhaust method of the present invention has a control mechanism for mode switching, effectively preventing water from flowing back into the engine, improving the reliability of the engine during underwater operation, and reducing the risk of failures caused by water entering the engine.

[0025] 4. The present invention ensures that the structure of the present invention is simple and highly compact, and has great application potential in the exhaust method of multi-mode engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0027] Figure 1 is a schematic structural diagram of the exhaust method in the present invention;

[0028] Figure 2 is a front view of the exhaust method in the present invention;

[0029] Figure 3 is a cross-sectional view of the outer chamber channel;

[0030] Figure 4 is a schematic diagram of the air working mode of the exhaust method in Example 1 of the present invention;

[0031] Figure 5 is a schematic diagram of the underwater working mode of the exhaust method in Example 2 of the present invention;

[0032] Figure 6 is a left view of the tail baffle drive structure of the exhaust method in the present invention;

[0033] Figure 7 Top view of the tail baffle drive structure for the exhaust method in the present invention;

[0034] The reference numerals in the drawings are respectively: 1 - inner cavity; 2 - inner cavity ring wall; 3 - outer cavity; 4 - flow guiding column; 5 - side flow guiding plate; 6 - outer cavity partition plate; 7 - outer housing; 8 - tail baffle; 81 - tail baffle mounting ring; 82 - tail baffle positioning rod; 9 - push rod; 91 - push rod fixing pin; 92 - steering shaft; 10 - cylinder; 11 - cylinder seat. Detailed implementation manners

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments.

[0036] Refer to Figure 1-7 In this embodiment, a distributed exhaust device for multi - mode power system air exhaust and underwater exhaust includes, from inside to outside, an inner cavity 1, an outer cavity 3, a flow guiding column 4, a side flow guiding plate 5, an outer cavity partition plate 6, an outer housing 7 and a tail baffle 8.

[0037] The outer periphery of the inner cavity 1 is the outer cavity 3. The outer cavity 3 is composed of a number of circumferentially distributed channels. The outside of the outer cavity 3 is the outer housing 7. The flow guiding column 4 is arranged at the exhaust inlet. The flow guiding column 4 connects the inner cavity ring wall 2 and the outer housing 7. The side flow guiding plate 5 is connected to the flow guiding column 4. When the air flow enters from the exhaust inlet and is guided by the flow guiding column 4, it will continue to flow along the side flow guiding plate 5. An openable and closable tail baffle 8 is installed at the end of the air flow channel of the outer cavity 3.

[0038] The inner cavity 1 extends from its front starting position to the rear end. Throughout its entire length, its radial cross - section always remains the same, presenting a regular straight cylindrical channel form. This structural feature endows the inner cavity 1 with high consistency and stability in terms of spatial form.

[0039] The inner cavity ring wall 2 is a straight cylindrical wall surface, separating the inner cavity 1 and the outer cavity 3 to form two independent channels. Among them, the inner cavity 1, as an independent spatial region, has its own specific functions and uses; while the outer cavity 3 forms another relatively independent channel structure. The two are spatially isolated from each other and each undertakes different working processes. This unique structural design enables different media or substances to flow, transmit or undergo specific physical and chemical reactions respectively in these two independent channels, avoiding interference and mixing with each other, thereby effectively improving the operation efficiency and stability of the entire device, and providing a solid structural foundation for its efficient operation under various complex working conditions.

[0040] The outer chamber 3 is composed of circumferentially evenly distributed sector channels, each sector is independently provided with an exhaust channel, and the cross-sectional area and shape of the channel are designed according to the air flow characteristics of the intake area corresponding to the sector. The present invention takes the sector shape as an example.

[0041] The guide column 4 is arranged at the entrance of the exhaust channel. The guide column 4 is not only a simple structural component, but also an important link connecting the inner chamber ring wall 2 and the outer shell 7. Its connection method is tight and stable, ensuring the integrity and stability of the entire structure. The thickness of the guide column 4 is about 1.5 to 2 times the thickness of the outer chamber partition plate 6. The thicker guide column 4 can better guide the airflow entering from the exhaust inlet, so that it flows along a predetermined path, avoids airflow turbulence and backflow, and thus effectively improves the exhaust efficiency. At the same time, such a thickness design also enhances the structural strength of the guide column 4 itself, so that it can remain stable when it is subjected to the impact of high-speed airflow and the force generated by the internal and external pressure difference, and will not be easily deformed or damaged, thereby ensuring the long-term stable operation of the entire exhaust system.

[0042] The side guide plate 5 connects the guide column 4 with the outer chamber partition plate 6, and adopts a circumferentially contracting smooth transition surface. When the airflow enters from the exhaust inlet, it will continue to flow along the side guide plate 5 after being initially guided by the guide column 4. The side guide plate 5 shows a circumferential contraction trend, the original channel space of the outer chamber 3 gradually narrows, and the channel cross-sectional area is correspondingly reduced, which can further accelerate the airflow. The smooth transition surface can greatly reduce the resistance and turbulence caused by the sudden change of direction of the airflow during the flow process, so that the airflow can transition from the guide column to the outer chamber partition plate area in a smoother and more stable state, and then flow in the outer chamber in an orderly manner. The smooth transition surface can only truly play its role in optimizing the flow of airflow if it ensures that the various parameters such as the curvature, radian and surface roughness of the surface meet the precise standards. At the same time, the design of the smooth transition surface also helps to improve the mechanical properties of the entire structure, reduce the risk of structural damage caused by stress concentration, extend the service life of the equipment, and ensure that the system always maintains a stable and reliable working state during long-term, high-intensity operation.

[0043] The outer chamber partition plate 6 is circumferentially vertical, perpendicular to the circumferential direction of the outer chamber 3, and distributed at specific intervals and angles, so as to evenly and reasonably divide the outer chamber channel into a plurality of relatively independent sub-channels.

[0044] The outer shell 7 presents a specific annular wall structure, which surrounds and defines the outer chamber 3 in an envelope form, thereby forming a comprehensive enclosure for the outer chamber 3.

[0045] The tail baffle 8 is the end of the airflow channel of the outer chamber 3, and its cross section is a fan-shaped flat plate that wraps the outer chamber channel.

[0046] The tailgate mounting ring 81 is fixed on the tailgate 8, connecting the tailgate 8 and the tailgate positioning rod 82, and is a mounting ring with a circular cross-section.

[0047] The tailgate positioning rod 82 is a mounting rod with a circular cross-section, connecting the tailgate 8 and the steering shaft 92, and is used to realize the reasonable configuration and intelligent adjustment of the distributed exhaust passage.

[0048] The steering shaft 92 has a circular cross-section and its length can be changed according to the magnitude of the force. There are two through holes on the cross-section. The central circular hole is the position of the tailgate positioning rod 82, and the eccentric circular hole is the position of the push rod fixing pin 91.

[0049] The push rod fixing pin 91 has a circular cross-section and is located at the eccentric position of the steering shaft 92, and is used to fix the push rod 9, converting the linear motion of the push rod 9 into circular motion.

[0050] The cross-section of the push rod 9 is circular, connecting the cylinder 10 and the tailgate mounting ring 81. It is a linear reciprocating mechanical structure that can realize the opening and closing of the tailgate 8. Thus, it ensures that in the dynamic mode of the power system, the exhaust process can be adjusted efficiently, stably and precisely according to the changes of the real-time working conditions, so as to meet the exhaust requirements in different working scenarios and improve the performance and stability of the whole power system.

[0051] The cylinder 10 provides axial thrust for the push rod 9 and is applied in the mode conversion stage.

[0052] The cylinder seat 11 is installed on the outer housing 7 to fix the cylinder 10.

[0053] The adjustment process of the tailgate 8 is as described below. For the drive structure, see the appendix Figure 5 、 6 。According to the pre-set complex algorithm, the opening and closing state of each tailgate 8 is precisely regulated by the cooperation of the cylinder 11 and the push rod 9. Specifically, the cylinder 11 provides the necessary driving force for the whole regulation process. Under the action of the gas pressure of the cylinder 11, the push rod 9 starts to perform regular linear motion. This motion is transmitted to the steering shaft 92 through the tight connection with the push rod fixing pin 91. Under the action of the eccentric position of the eccentric push rod fixing pin 91, the steering shaft 92 drives the tailgate mounting ring 81, the tailgate positioning rod 82, and the tailgate 8 to perform circular motion together.

[0054] Embodiment 1

[0055] The exhaust method of the distributed exhaust device for the multi-mode power system for air exhaust and underwater exhaust:

[0056] In the air working mode, by the appendix Figure 2As shown, the inner cavity ring wall 2 is accurately docked with the engine exhaust port. At this time, when facing the large flow of exhaust gas in the air of the power system, the push rod 9 is used to adjust the radial position of the exhaust tail baffle 8 to the maximum, so that the air flow cross-sectional area of the circumferentially distributed outer cavity 3 is increased to the maximum. With such a structural arrangement, the radial air flow starts its unique flow path. First, the air flow enters from the front end of the outer cavity 3. When passing through the guide column 4, due to the structure and position arrangement of the guide column 4, the air flow is split. These split air flows are accelerated along the gradually shrinking side guide plate 5 and flow into the 4 outer cavities 3 evenly distributed in the circumferential direction. Finally, after passing through this series of flow processes, the air flow is smoothly discharged into the atmosphere, completing the entire gas discharge process.

[0057] Embodiment 2

[0058] Exhaust method of the distributed exhaust device for air exhaust and underwater exhaust of the multi-mode power system:

[0059] In the underwater working mode, according to the appendix Figure 3 Expanding the process description, at this time, when facing the small flow of exhaust gas in the water of the power system, the radial air flow starts to flow from the front end of the outer cavity 3. According to the main air flow in the incoming flow direction, it mainly flows out along the air flow channel of the same outer cavity 3. It should be noted here that while the tail baffle 8 at the end in the outer cavity 3 into which the main air flow enters is in the open state, the tail baffles 8 of the remaining outer cavities 3 are all in the closed state. Such an arrangement can effectively prevent the air flow from dispersing in unnecessary paths, ensuring that the main air flow is concentrated and discharged from a specific outer cavity 3, so as to meet the special requirements of the engine during low-flow exhaust and maintain the normal operation of the engine in a specific situation.

[0060] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention.

Claims

1. A distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system, characterized in that: The invention comprises, from inside to outside, an inner chamber (1), an outer chamber (3), a guide column (4), a side guide plate (5), an outer chamber partition plate (6), an outer shell (7) and a tail baffle (8), The outer periphery of the inner chamber (1) is an outer chamber (3), and the outer chamber (3) is composed of a plurality of channels distributed in the circumferential direction, each channel region being provided with an exhaust channel, and the outer side of the outer chamber (3) is provided with an outer shell (7), and the guide column (4) is provided at the entrance of the exhaust channel, and the guide column (4) connects the inner chamber annular wall 2 and the outer shell (7), and the side guide plate (5) is connected to the guide column (4), and when the airflow enters from the exhaust entrance, it is guided by the guide column (4) and then continues to flow along the side guide plate (5), and a tail baffle (8) that can be opened and closed is installed at the end of the airflow channel of the outer chamber (3).

2. The distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system according to claim 1 is characterized by: The outer chamber (3) is composed of sector channels evenly distributed in the circumferential direction.

3. The distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system according to claim 1 is characterized by: The channels in the outer chamber (3) are separated by an outer chamber partition plate (6), and the side guide plate (5) connects the guide column (4) to the outer chamber partition plate (6).

4. The distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system according to claim 3 is characterized by: The thickness of the guide column (4) is 1.5-2 times the thickness of the outer chamber partition plate (6).

5. The distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system according to claim 1 is characterized by: The tail baffle (8) is fixed on the tail baffle positioning rod (82) via a tail baffle mounting ring (81).

6. The distributed exhaust device for aerial exhaust and underwater exhaust of the multi-mode power system according to claim 5 is characterized by: The push rod (9) is connected to the cylinder (10) and the tail baffle mounting ring (81), and can realize linear reciprocation, thereby realizing the opening and closing of the tail baffle (8).

7. The distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system according to claim 6 is characterized by: The push rod (9) is fixed by a push rod fixing pin (91).

8. The distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system according to claim 7 is characterized by: The push rod fixing pin (91) and the tailgate positioning rod (82) are fixed via a steering shaft (92). The cross section of the steering shaft (92) is provided with two through holes, wherein the central circular hole is the position of the tailgate positioning rod (82), and the eccentric circular hole is the position of the push rod fixing pin (91).

9. A method for a distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system as claimed in claim 8, characterized in that: In the aerial working mode, the inner chamber annular wall (2) is precisely connected to the engine exhaust port. When facing the large-flow exhaust of the power system in the air, the radial position of the exhaust tail baffle (8) is adjusted to the maximum by using the push rod (9), so that the air flow cross-sectional area of ​​the circumferentially distributed outer chamber (3) is increased to the maximum; Then the airflow enters from the front end of the outer chamber (3), and when passing through the guide column (4), due to the structure and position setting of the guide column (4), the airflow is split, and the split airflow is accelerated along the gradually shrinking side guide plate (5) and flows into the four outer chambers (3) evenly distributed in the circumferential direction. Finally, the gas flow is discharged into the atmosphere, completing the entire gas emission process.

10. A method for a distributed exhaust device for aerial exhaust and underwater exhaust of a multi-mode power system as claimed in claim 8, characterized in that: In the underwater working mode, when facing the underwater low-flow exhaust of the power system, the radial airflow starts to flow from the front end of the outer chamber (3), and the main steam flow flows out along the airflow channel of the same outer chamber (3) according to the incoming flow direction. The tail baffle (8) at the end of the outer chamber (3) into which the main steam flows is in an open state. At the same time, the tail baffles (8) of the other outer chambers (3) are all in a closed state.

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