Liquid fuel gasification pressure stabilizing device and aero-engine with same

Abstract

The invention discloses a liquid fuel gasification pressure stabilizing device and an aero-engine with the same. The exhaust casing is provided with an exhaust flow channel, the vaporizer is arranged on the peripheral face of the exhaust casing in the axial direction of the exhaust casing, the gas collection cylinder is connected to the outer wall of the vaporizer and extends in the axial direction of the exhaust casing, and the pressure detector is connected with an engine fuel regulation and control system. A fuel inlet is formed in the gasifier, a gas collecting cavity is formed in the gas collecting cylinder, the gasifier is communicated with the gas collecting cavity, the gasifier is used for enabling liquid fuel entering the gasifier to be heated and gasified under the action of high-temperature exhaust gas in the exhaust flow channel to form gaseous fuel and discharging the gaseous fuel into the gas collecting cavity, and a fuel outlet is further formed in the wall face of the gas collecting cavity. The pressure detector is arranged in the gas collection cavity and used for detecting the pressure in the gas collection cavity so that the engine fuel regulation and control system can correspondingly control the flow of the liquid fuel entering the gasifier, and then the pressure of the gas fuel in the gas collection cavity can be correspondingly regulated and controlled. The device can be used on the aero-engine, and the combustion efficiency of the liquid fuel in the aero-engine is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engines and gas turbines, in particular, to a liquid fuel gasification pressure stabilizing device. Furthermore, the present application also relates to an aero-engine comprising the above-mentioned liquid fuel gasification pressure stabilizing device. BACKGROUND

[0002] It is well known that gaseous fuel is easier to mix evenly with air, burns more fully and has higher combustion efficiency, while liquid fuel needs to be atomized to achieve the effect of full mixing with air, and its combustion efficiency is greatly affected by atomization. In order to improve fuel storage efficiency, aircraft generally selects liquid fuel with large energy density for aero-engines. The nozzles of traditional fuel aero-engines have been designed very complicatedly to improve the atomization effect of liquid fuel, but the benefits of atomization effect have reached a theoretical bottleneck, which limits the further improvement of the combustion efficiency of aero-engines.

[0003] Currently, there is no engineering case of using a liquid fuel gasifier in the field of aero-engines, as well as ground gas turbines and marine gas turbines. The following introduces the commonly used liquid fuel gasifier scheme in industry: Patent one: CN117889451A, an alcohol-based liquid fuel gasifier, comprising a box body, a combustion heating structure for adjusting the uniform speed of the flame according to the injection amount of alcohol-based liquid fuel is arranged at the bottom of the box body, the combustion heating structure comprises a speed-adjustable flame divider cover, a spiral gasification pipe connected with the box body is arranged at the upper end of the flame divider cover, a connecting pipe is arranged at the lower end of the gasification pipe, a hydraulic pump connected with the connecting pipe is arranged at one end of the box body, a liquid inlet pipe is arranged at one end of the hydraulic pump, a pipeline stretching structure matched with the combustion heating structure is arranged at the upper end of the box body, and a cleaning structure matched with the pipeline stretching structure is also arranged at the upper end of the box body. This scheme effectively solves the problem that the heating area of the gasification pipeline in the prior art is small, but the utilization rate of the flame cannot be adjusted according to the amount of alcohol-based fuel, resulting in reduced gasification efficiency.

[0004] Patent two: CN202328230U, a liquid fuel gasifier, which is composed of a gasification device, a combustion device, a sound reduction device, a fire ring, a valve body assembly and a fixing frame; the gasification device is arranged above the combustion device, and the gasification device is arranged in the sound reduction device, and the combustion device is partially or entirely arranged in the sound reduction device; the gasification device is composed of a gasification pipe and a gas resistance, and the composition structure is that the gas resistance is inserted into the gasification pipe, and then a spiral spring-shaped columnar body or a conical body is formed; the gasification pipe is a metal hollow pipe or a non-metal high-temperature-resistant hollow pipe; the sound reduction device is an annular columnar or conical structure, and the sound reduction device is arranged in the fire ring and surrounds the gasification device and the combustion device. This scheme effectively solves the problem of complete gasification of liquid fuel, makes the combustion sufficient and low in energy consumption, saves energy by more than 60%, and effectively controls the temperature of the gasification pipe and solves the problem of carbon deposition.

[0005] But the above-mentioned industrial commonly used liquid fuel gasifier scheme, when applied to the aero-engine, has the following shortcomings: 1) The industrial commonly used liquid fuel gasifier generally utilizes the combustion of the gasified fuel to directly provide heating heat source, and the aero-engine cannot provide a separate combustion heating source for the gasifier due to the weight, space and other limitations, so that it greatly limits its use in the aero-engine; 2) The aero-engine is generally horizontally arranged, which is different from the up-down structure of the industrial commonly used liquid fuel gasifier, and the existing method of utilizing the low gas density to automatically float in the vertical spiral pipe will not be applicable; 3) The aero-engine fuel control system has requirements for the pressure of the gasified fuel, and the existing industrial commonly used liquid fuel gasifier does not have the function of pressurizing and stabilizing, so it cannot be directly applied. SUMMARY

[0006] The present application provides a kind of liquid fuel gasification pressure stabilizing device and the aero-engine with it to solve the technical problems that the existing liquid fuel gasification device cannot be directly used in aero-engine.

[0007] The technical scheme adopted by the present application is as follows: A kind of liquid fuel gasification pressure stabilizing device, comprising: an exhaust case with an exhaust flow passage arranged through along the axial direction, a gasifier arranged on the outer circumferential surface of the exhaust case along the axial direction of the exhaust case, a gas collecting cylinder connected to the outer wall of the gasifier and extending along the axial direction of the exhaust case, and a pressure detector connected to the engine fuel control system;Fuel inlet is provided on the gasifier and communicated with the external fuel supply source for supplying liquid fuel, the gas collecting cylinder has a gas collecting cavity extending along the length direction thereof, the gasifier is communicated with the gas collecting cavity, the gasifier is used to heat and gasify the entering liquid fuel to form gaseous fuel under the action of high-temperature exhaust gas in the exhaust flow passage and discharge into the gas collecting cavity, the wall surface of the gas collecting cavity is also provided with a fuel outlet penetrating the wall surface, so as to supply the gaseous fuel in the gas collecting cavity to the outside;The pressure detector is arranged in the gas collecting cavity and used to detect the pressure in the gas collecting cavity, so as to control the flow of liquid fuel entering the gasifier and adjust the pressure of gaseous fuel in the gas collecting cavity.

[0008] Further, the exhaust case is cylindrical;The gasifier comprises a plurality of groups of gasification ring pipes arranged in sequence along the axial direction of the exhaust case, the gasification ring pipe is annular, is clamped on the outer circle of the exhaust case, and the gasification ring pipe is a hollow pipe communicated along the circumferential direction;The first group of gasification ring pipes arranged in the axial direction is provided with a fuel inlet, and each group of gasification ring pipes is communicated with the gas collecting cavity respectively, so as to supply oil to the gasification ring pipes in sequence along the axial arrangement direction through the gas collecting cavity.

[0009] Further, the gas collecting cylinder is located above the fixed exhaust manifold and extends upward along the axial direction of the exhaust manifold from the inlet end to the outlet end, so that the gas collecting cavity extends upward along the axial direction of the exhaust manifold.

[0010] Further, the first group of gasification ring pipes located at the lowest position of the gas collecting cavity comprises a ring-shaped ring pipe body and a vertical air pipe connected with the highest position of the ring pipe body; the lowest position of the ring pipe body is provided with a fuel inlet; and the top end of the air pipe is connected with the bottom surface of the gas collecting cavity.

[0011] Further, the ring pipe bodies of the other groups of gasification ring pipes are the same as the first group of gasification ring pipes and each comprises a ring pipe body and a vertical air pipe and liquid supplement pipe connected with the ring pipe body; the top ends of the air pipe and liquid supplement pipe are connected with the bottom surface of the gas collecting cavity, and the position of the liquid supplement pipe of the ring pipe body of the same group connected with the bottom surface of the gas collecting cavity is lower than that of the air pipe, so that the liquid fuel in the gas collecting cavity is first supplemented into the ring pipe body through the top end of the liquid supplement pipe; and the air pipe is used for supplying the gaseous fuel formed by heating and gasification into the gas collecting cavity.

[0012] Further, the air pipe is a vertical pipe, and the bottom end of the air pipe is connected with the top surface of the highest position of the ring pipe body; the liquid supplement pipe is in an "L" shape, and the horizontal pipe of the liquid supplement pipe is connected with the side wall surface of the highest position of the ring pipe body, and the top end of the vertical pipe of the liquid supplement pipe is connected with the bottom surface of the gas collecting cavity.

[0013] Further, the inner diameter of the air pipe is smaller than that of the ring pipe body; and the inner diameter of the liquid supplement pipe is smaller than that of the air pipe.

[0014] Further, the fuel outlet is located on the top surface of the upward end of the gas collecting cavity; the liquid fuel gasification and pressure stabilizing device further comprises a defoaming mesh plate used for defoaming the gaseous fuel, and the defoaming mesh plate is horizontally arranged in the gas collecting cavity to divide the gas collecting cavity into a gas collecting part and a defoaming part connected with each other, and the fuel outlet is connected with the defoaming part.

[0015] Further, the liquid fuel gasification and pressure stabilizing device further comprises a temperature detector used for detecting the temperature of the gaseous fuel, and the temperature detector is arranged in the gas collecting cavity and connected with the engine fuel control system; the fuel outlet is further connected with the engine fuel control system and the exhaust flow channel through pipelines, and a gas release valve is arranged in the pipelines and connected with the engine fuel control system, so that the gaseous fuel is discharged into the exhaust flow channel when the pressure or temperature of the gaseous fuel in the gas collecting cavity exceeds the set value of the system; and the oil supply source comprises a liquid oil tank, an oil supply pipeline connected with the liquid oil tank, and a fuel pump arranged in the oil supply pipeline and controlled by the engine fuel control system.

[0016] According to another aspect of the present application, there is also provided an aero-engine having the liquid fuel gasification pressure stabilizing device according to any one of the above.

[0017] The present application has the following advantages: The present application is based on the principle of liquid gasification, makes full use of the exhaust heat source of the aero-engine, and considers the fuel inlet requirements of the fuel control system of the aero-engine, and designs a "liquid fuel gasification pressure stabilizing device". Compared with the commonly used liquid fuel gasification scheme in the industry, the device has the following advantages: 1) In the device, the gasifier is directly fixed to the outer peripheral surface of the exhaust case, so that the high-temperature exhaust gas passing through the exhaust flow passage in the exhaust case heats and gasifies the liquid fuel in the gasifier, without the need for self-heating of the gaseous fuel after gasification, thereby greatly improving the gasification efficiency of the liquid fuel and meeting the use requirements on the aero-engine, and further improving the combustion efficiency of the liquid fuel in the aero-engine; 2) In the device, the gasifier and the gas collecting cylinder are arranged along the axial direction of the exhaust case, i.e., the design is integrated with the horizontally arranged exhaust device of the aero-engine, which greatly improves the overall performance of the aero-engine while optimizing the system structure design, and has higher efficiency than the independent traditional liquid fuel gasification scheme in the industry; 3) In the device, through the self-feedback design of the pressure detector and the engine fuel control system, the gaseous fuel in the gas collecting cavity is stabilized in pressure, and the pressure of the gaseous fuel discharged at the same time meets the pressure stabilization function required by the fuel inlet of the engine fuel control system, while the existing commonly used liquid fuel gasifier does not have the function of pressurization and pressure stabilization.

[0018] 4) The traditional aero-engine or ground gas turbine adopts a regenerative cycle to improve the efficiency of the engine, which uses the waste heat of the exhaust gas to heat the air entering the combustion chamber, while the present application uses the waste heat of the exhaust gas to heat the fuel, which has the effect of the traditional regenerative cycle, and at the same time, the gasification of the fuel reduces the physical structure of the traditional engine fuel and improves the combustion efficiency, and the benefits are much greater than those of the traditional regenerative cycle.

[0019] In addition to the objects, features, and advantages described above, the present application has other objects, features, and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings, and their description, are presented to explain the present application and are not intended to limit the present application unduly. Figure 1is a space structure schematic diagram of the liquid fuel gasification pressure stabilizing device of the preferred embodiment of the present application; Figure 2 is Figure 1 a sectional view schematic diagram of the main view structure; Figure 3 is Figure 2 a vertical cross section schematic diagram; Figure 4 is Figure 2 a partial structure schematic diagram; Figure 5 is a working principle diagram of the liquid fuel gasification pressure stabilizing device of the preferred embodiment of the present application.

[0021] Legend: 1, exhaust casing; 101, exhaust flow channel; 11, casing body; 12, exhaust flow cone; 13, flow cone support plate; 2, gasifier; 201, fuel inlet; 21, gasification ring pipe; 211, ring pipe body; 212, air pipe; 213, liquid supplement pipe; 3, gas collecting cylinder; 301, gas collecting cavity; 302, fuel outlet; 4, defoaming mesh plate. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following.

[0023] Referring to Figure 1 and Figure 2 , the preferred embodiment of the present application provides a liquid fuel gasification pressure stabilizing device, comprising: an exhaust casing 1 having an exhaust flow channel 101 disposed through along the axial direction, a gasifier 2 arranged on the outer circumferential surface of the exhaust casing 1 extending along the axial direction of the exhaust casing 1, a gas collecting cylinder 3 connected to the outer wall of the gasifier 2 and extending along the axial direction of the exhaust casing 1, and a pressure detector connected to the engine fuel control system. The gasifier 2 is provided with a fuel inlet 201 in communication with an external fuel supply source for supplying liquid fuel, and the gas collecting cylinder 3 has a gas collecting cavity 301 disposed extending along the length direction thereof, the gasifier 2 is in communication with the gas collecting cavity 301, the gasifier 2 is used for heating and gasifying the entering liquid fuel to form gaseous fuel under the action of high temperature exhaust gas in the exhaust flow channel 101 and discharging into the gas collecting cavity 301, and the wall surface of the gas collecting cavity 301 is further provided with a fuel outlet 302 disposed through the wall surface for supplying the gaseous fuel in the gas collecting cavity 301 to the outside. The pressure detector is arranged in the gas collecting cavity 301 for detecting the pressure in the gas collecting cavity 301 and further making the engine fuel control system control the liquid fuel flow entering the gasifier 2 accordingly, and further adjusting the pressure of the gaseous fuel in the gas collecting cavity 301.

[0024] In operation, the oil supply source supplies liquid fuel into the gasifier 2 through the fuel inlet 201. Since the gasifier 2 is directly installed on the outer circumferential surface of the exhaust casing 1, and the inlet of the exhaust flow channel 101 in the exhaust casing 1 is directly connected to the high-temperature exhaust gas of the engine, the high-temperature exhaust gas is discharged from the tail end of the exhaust casing 1 after passing through the exhaust flow channel 101, so that the liquid fuel in the gasifier 2 is heated and gasified to form gaseous fuel under the action of the high-temperature exhaust gas in the exhaust flow channel 101, and the gaseous fuel is discharged into the gas collecting cavity 301 through the outlet of the gasifier 2 connected to the gas collecting cavity 301, and the gaseous fuel in the gas collecting cavity 301 is finally supplied to the outside of the engine through the fuel outlet 302. At the same time, the pressure detector detects the pressure in the gas collecting cavity 301 in real time. When the pressure in the gas collecting cavity 301 is lower than the system set value, the engine fuel control system makes the oil supply source supply more liquid fuel into the gasifier 2 for gasification. When the pressure detector detects that the pressure in the gas collecting cavity 301 meets the system set value, the gaseous fuel stored in the gas collecting cavity 301 is discharged to the outside through the fuel outlet 302, so that the gaseous fuel is stably supplied.

[0025] Based on the liquid gasification principle, the exhaust heat source of the aero-engine is fully utilized, and the fuel inlet requirement of the fuel control system of the aero-engine is considered, and a "liquid fuel gasification pressure stabilizing device" is designed. Compared with the commonly used liquid fuel gasification scheme in industry, the device has the following advantages: 1) In the device, the gasifier 2 is directly fixed on the outer circumferential surface of the exhaust casing 1, so that the liquid fuel in the gasifier 2 is heated and gasified by the high-temperature exhaust gas passing through the exhaust flow channel 101 in the exhaust casing 1, without the need for self-heating of the gaseous fuel after gasification, thereby greatly improving the gasification efficiency of the liquid fuel and meeting the use requirements on the aero-engine, and further improving the combustion efficiency of the liquid fuel in the aero-engine. 2) In the device, the gasifier 2 and the gas collecting cylinder 3 are arranged along the axial direction of the exhaust casing 1, that is, they are designed to be integrated with the horizontally arranged exhaust device of the aero-engine, which greatly improves the comprehensive performance of the aero-engine and optimizes the structural design of the system, and has higher efficiency than the independent traditional liquid fuel gasification scheme in industry. 3) In the device, the pressure detector and the engine fuel control system are designed to be self-feedback, to stabilize the pressure of the gaseous fuel in the gas collecting cavity 301 and the pressure of the discharged gaseous fuel, and the existing industrial commonly used liquid fuel gasifier does not have the function of pressurization and pressure stabilization.

[0026] 4) The traditional aero-engine or ground gas turbine, in order to improve the engine efficiency and adopt the regenerative cycle, which is to use the exhaust heat of the exhaust gas to heat the air into the combustion chamber, and the scheme of the present application is to use the exhaust heat to heat the fuel, which has the effect of the traditional regenerative cycle, and the gasification of the fuel reduces the traditional engine fuel material structure and improves the combustion efficiency, which is much more than the traditional regenerative cycle.

[0027] Optionally, as shown in Figure 1 and Figure 2 The exhaust manifold 1 includes a hollow cylindrical manifold body 11, an exhaust flow cone 12 arranged in the channel of the manifold body 11 in the axial direction, and a plurality of flow cone support plates 13 arranged in sequence and spaced apart in the circumferential direction and connected between the manifold body 11 and the exhaust flow cone 12. The gap between the manifold body 11 and the exhaust flow cone 12 forms an exhaust flow passage 101. The gasifier 2 is installed on the outer circle of the manifold body 11.

[0028] Optionally, as shown in Figure 2As shown, the gasifier 2 comprises a plurality of groups of gasification annular pipes 21 arranged along the axial direction of the exhaust manifold 1 in sequence, the gasification annular pipes 21 are annular, clamped on the outer circle of the exhaust manifold 1, and the gasification annular pipes 21 are hollow pipes communicating along the circumferential direction. The first group of gasification annular pipes 21 arranged along the axial direction is provided with a fuel inlet 201, and each group of gasification annular pipes 21 respectively communicates with a gas collection chamber 301, so that the gasification annular pipes 21 sequentially enter the oil along the axial arrangement direction through the gas collection chamber 301. In this alternative, each group of gasification annular pipes 21 does not directly communicate, at the beginning of work, liquid fuel enters the first group of gasification annular pipes 21 through the fuel inlet 201, and the gaseous fuel produced after heating and gasification enters the communicating gas collection chamber 301. When the pressure in the gas collection chamber 301 does not meet the pressure requirement of the fuel inlet of the engine fuel control system, liquid fuel continues to enter through the fuel inlet 201, fills the first group of gasification annular pipes 21, and then overflows into the gas collection chamber 301. Then, the second group of gasification annular pipes 21 and the gas collection chamber 301 are communicated through the port to enter the second group of gasification annular pipes 21 for heating and gasification. When liquid fuel continues to enter through the fuel inlet 201, liquid fuel will sequentially enter each group of gasification annular pipes 21 along the axial arrangement direction of the gasification annular pipes 21, that is, the working mode of "making the gasification annular pipes 21 sequentially enter the oil along the axial arrangement direction through the gas collection chamber 301". Since each group of gasification annular pipes 21 is annular, and when the pressure in the gas collection chamber 301 meets the requirement, only the last group of gasification annular pipes 21 may not be filled with liquid fuel. Therefore, the circumferentially arranged gasification annular pipes 21 and the exhaust manifold 1 are uniformly heat-exchanged, on the one hand, it will not cause stress concentration and local cracks in the exhaust manifold 1 due to uneven circumferential heat exchange, on the other hand, it will not cause the risk of local liquid fuel high-temperature carbonization due to the circumferential non-filling of the gasification annular pipes 21, and the liquid fuel in the gasification annular pipes 21 is uniformly heated; in addition, the plurality of groups of gasification annular pipes 21 are arranged along the axial direction in sequence and sequentially enter the oil, if the rear section of the exhaust manifold 1 deforms along the axial direction due to the absence of liquid fuel in the corresponding position of the gasification annular pipes 21, the exhaust manifold 1 itself has an axial expansion and contraction amount when designed, thereby being unaffected by uneven axial heat exchange.

[0029] In this alternative, as shown in Figure 2 The gas collection cylinder 3 is located directly above the fixed exhaust manifold 1, and gradually extends upward along the axial direction of the exhaust manifold 1 from the inlet end to the outlet end of the exhaust manifold 1, thereby making the gas collection chamber 301 gradually extend upward along the axial direction of the exhaust manifold 1. The top of each group of gasification annular pipes 21 extends upward to communicate with the upwardly extending bottom surface in the gas collection chamber 301, thereby making the liquid fuel in the gas collection chamber 301 sequentially enter the gasification annular pipes 21 arranged along the axial direction. As shown in Figure 2As shown, the top of each group of gasification annular pipes 21 extends vertically upward and then communicates with the bottom surface of the gas collection cavity 301, and the bottom surface of the gas collection cavity 301 gradually rises along the axial direction, so that the communication position of each gasification annular pipe 21 with the bottom surface of the gas collection cavity 301 gradually rises along the axial direction, thereby enabling the liquid fuel to sequentially enter each gasification annular pipe 21 by the action of the gas collection cavity 301.

[0030] In this alternative, as shown in Figure 2 , the first group of gasification annular pipes 21 located at the lowest position of the gas collection cavity 301 includes an annular pipe body 211 and a gas passage pipe 212 vertically arranged and having a bottom end communicating with the highest position of the pipe body 211. The lowest position of the pipe body 211 is provided with a fuel inlet 201. The top end of the gas passage pipe 212 communicates with the bottom surface of the gas collection cavity 301. In operation, the liquid fuel from the fuel supply source first enters the first group of gasification annular pipes 21 through the fuel inlet 201, and then sequentially enters the second group of gasification annular pipes 21, the third group of gasification annular pipes 21, and so on by the action of the gas collection cavity 301.

[0031] In this alternative, as shown in Figures 2-4 , the remaining groups of gasification annular pipes 21 except the first group of gasification annular pipes 21 are identical in structure and each includes an annular pipe body 211 and a gas passage pipe 212 and a liquid supplement pipe 213 vertically arranged and having bottom ends respectively communicating with the pipe body 211. The top ends of the gas passage pipe 212 and the liquid supplement pipe 213 respectively communicate with the bottom surface of the gas collection cavity 301, and the position of the liquid supplement pipe 213 of the pipe body 211 of the same group communicating with the bottom surface of the gas collection cavity 301 is lower than that of the gas passage pipe 212, so that the liquid fuel in the gas collection cavity 301 is first supplemented into the pipe body 211 through the top end of the liquid supplement pipe 213. The gas passage pipe 212 is used for the gaseous fuel generated by gasification to enter the gas collection cavity 301. In this alternative, the gas passage pipe 212 is used for discharging the gaseous fuel generated in the gasification annular pipe 21; the liquid supplement pipe 213 is used for supplementing the liquid fuel overflowing from the previous group of gasification annular pipes 21 into the gas collection cavity 301 into the next group of gasification annular pipes 21; and the gas collection cylinder 3 is fixed to the top ends of the gas passage pipes 212 and the liquid supplement pipes 213 arranged along the axial direction in sequence.

[0032] In a specific embodiment of this alternative, as shown in Figure 4 , the gas passage pipe 212 is a vertical pipe having a bottom end communicating with the top surface of the highest position of the pipe body 211. The liquid supplement pipe 213 is in the shape of "L", and its horizontal pipe communicates with the side wall surface of the highest position of the pipe body 211, and its vertical pipe has a top end communicating with the bottom surface of the gas collection cavity 301. As shown in Figure 2 and Figure 4As shown, in actual design, the gas collection cavity 301 is lifted upward along the engine axial end to be not less than 10°, so that, except the first group of gasification ring pipes 21, the liquid supplement passage orifice on the bottom surface of the gas collection cavity 301 is lower than the gas passage orifice, and the higher the liquid supplement passage orifice position is along the engine axial gasification ring pipe 21.

[0033] Preferably, the inner diameter of the vent pipe 212 is smaller than the inner diameter of the ring pipe body 211, so as to avoid that the vent aperture is too large to cause a large amount of bubbles in the ring pipe body 211 to pass through the vent pipe 212 at the same time or that the bubbles are too large to break the liquid too violently, and a large amount of liquid droplets splash into the gas collection cavity 301, which exceeds the capacity of the defoaming screen plate 4 and enters the fuel outlet 302. The inner diameter of the liquid supplement pipe 213 is smaller than the inner diameter of the vent pipe 212; because the density of liquid is much larger than the density of gas, under the same mass flow condition, the volume flow of liquid is small, so the liquid supplement passage in the liquid supplement pipe 213 is smaller than the inner diameter of the vent pipe 212.

[0034] Preferably, as shown, Figure 2 The fuel outlet 302 is located on the top surface of the upward end of the gas collection cavity 301. The liquid fuel gasification pressure stabilizing device further comprises a defoaming screen plate 4 for defoaming the discharged gaseous fuel, the defoaming screen plate 4 is horizontally arranged in the gas collection cavity 301 to divide the gas collection cavity 301 into a gas collection part and a defoaming part which are communicated only through the gas collection cavity 301, and the fuel outlet 302 is communicated with the defoaming part. In the preferred scheme, the defoaming screen plate 4 is horizontally arranged at a position which is 3 times the outlet aperture distance downward from the fuel outlet 302 in the gas collection cavity 301, and the grid size is about 1mm×1mm, which is used to eliminate excessive bubbles discharged from the gasification ring pipe 21 and avoid the bubbles from gathering at the fuel outlet 302 to affect the discharge gas to carry impurities.

[0035] Preferably, the liquid fuel gasification pressure stabilizing device further comprises a temperature detector for detecting the temperature of the gaseous fuel, the temperature detector is arranged in the gas collection cavity 301 and connected with the engine fuel control system. The fuel outlet 302 is further connected with the engine fuel control system and the exhaust flow channel 101 through pipelines, and a gas release valve is arranged in the pipeline, the gas release valve is connected with the engine fuel control system, so that when the pressure or temperature of the gaseous fuel in the gas collection cavity 301 exceeds the system set value, the gas release valve is opened to discharge the gaseous fuel into the exhaust flow channel 101. The oil supply source comprises a liquid oil tank, an oil delivery pipeline connected with the liquid oil tank, and a fuel pump arranged in the oil delivery pipeline, the fuel pump is controlled by the engine fuel control system.

[0036] The working principle of the device of the present application is as shown in Figure 5As shown: the engine fuel control system controls the fuel pump to pump liquid fuel from the liquid tank, through the fuel inlet 201 of the device into the first set of gasification annular pipes 21 of the gasifier 2, the high-temperature gas in the exhaust flow channel 101 transmits heat to the liquid fuel in the first set of gasification annular pipes 21 through the inner wall of the engine case body 11, the liquid fuel is gasified by heat to form gaseous fuel and enters the gas collection chamber 301 through the air pipe 212; if the pressure detector in the gas collection chamber 301 detects that the pressure in the gas collection chamber 301 is not enough, the engine fuel control system controls the fuel pump to pump more liquid fuel into the fuel inlet 201, and if the gasification power of the first set of gasification annular pipes 21 is not enough, the liquid fuel will fill the first set of gasification annular pipes 21 and enter the gas collection chamber 301 from the air pipe 212, the liquid level of the gas collection chamber 301 first reaches the liquid supplement pipe 213 of the second set of gasification annular pipes 21 which is the lowest in position, and then flows into the second set of gasification annular pipes 21 to continue heat exchange and gasification with the high-temperature gas in the exhaust flow channel 101, and the gaseous fuel in the second set of gasification annular pipes 21 rises into the gas collection chamber 301 through the air pipe 212; because the liquid supplement pipe 213 enters from the front side of the gasification annular pipe 21, and the gaseous fuel is discharged through the air pipe 212 at the top of the gasification annular pipe 21, it can be ensured that the liquid supplement and the gas discharge do not interfere with each other; if the pressure detector in the gas collection chamber 301 detects that the pressure in the gas collection chamber 301 is still not enough, the liquid will continue to enter the third set of gasification annular pipes 21 after filling the second set of gasification annular pipes 21, and until the pressure of the gaseous fuel discharged from the fuel outlet 302 is higher than the requirement set by the engine fuel control system, the engine fuel control system will control the supply into the aero-engine as required.

[0037] The large volume of the gas collection chamber 301 can store enough gaseous fuel for the engine to use, avoiding the response of the fuel pump not being timely when the state of the engine rises and falls; in addition to the pressure detector, the gas collection chamber 301 is also provided with a temperature detector, when the pressure or temperature of the gaseous fuel is too high and exceeds the bearing requirement set by the engine fuel control system, the excess high-temperature and high-pressure gaseous fuel is discharged through the pipeline to the exhaust flow channel 101 for direct combustion through the bleed valve controlled by the engine fuel control system, so as to avoid the adverse effects of high fuel pressure or temperature on the engine fuel control system.

[0038] Optionally, the preferred embodiment of the present application also provides an aero-engine with the liquid fuel gasification pressure stabilizing device as claimed in any one of the preceding claims, so that the aero-engine of the present application can heat and gasify the liquid fuel in the gasifier 2 by the high-temperature exhaust gas passing through the exhaust flow passage 101 in the exhaust casing 1, without using the gasified gaseous fuel for self-heating, thereby greatly improving the gasification efficiency of the liquid fuel and meeting the use requirements on the aero-engine; and the gasifier 2 and the gas collecting cylinder 3 are arranged in the axial direction of the exhaust casing 1, that is, are designed in combination with the horizontally arranged aero-engine exhaust device, thereby greatly improving the comprehensive performance of the aero-engine and optimizing the system structure design, and the efficiency is higher than that of the conventional liquid fuel gasification scheme in the industry.

[0039] The preferred embodiments of the present application have been described above with the preferred embodiments thereof, but the present application is not limited to the preferred embodiments and can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid fuel gasification pressure stabilizing device characterized by comprising: The application relates to a liquid fuel gasification pressure stabilizing device. The device comprises: an exhaust manifold (1) provided with an exhaust flow channel (101) extending in the axial direction, a vaporizer (2) arranged on the outer circumferential surface of the exhaust manifold (1) and extending along the axial direction of the exhaust manifold (1), a gas collecting cylinder (3) connected to the outer wall of the vaporizer (2) and extending along the axial direction of the exhaust manifold (1), and a pressure detector connected to an engine fuel control system. The vaporizer (2) is provided with a fuel inlet (201) communicated with an external fuel supply source, the gas collecting cylinder (3) is provided with a gas collecting cavity (301) extending along the length direction of the gas collecting cylinder (3), the vaporizer (2) is communicated with the gas collecting cavity (301), the vaporizer (2) is used for heating and gasifying the entering liquid fuel into gaseous fuel under the action of high-temperature exhaust gas in the exhaust flow channel (101) and discharging the gaseous fuel into the gas collecting cavity (301), the wall surface of the gas collecting cavity (301) is provided with a fuel outlet (302) extending through the wall surface, and the gaseous fuel in the gas collecting cavity (301) is discharged outwards. The pressure detector is arranged in the gas collecting cavity (301) and is used for detecting the pressure in the gas collecting cavity (301) and then making the engine fuel control system control the liquid fuel flow entering the vaporizer (2) correspondingly and then making the engine fuel control system control the pressure of the gaseous fuel in the gas collecting cavity (301) correspondingly.

2. The liquid fuel gasification pressure stabilizing device according to claim 1, wherein the exhaust manifold (1) is in a cylindrical shape. The vaporizer (2) comprises a plurality of groups of vaporizing ring pipes (21) arranged in sequence along the axial direction of the exhaust manifold (1), the vaporizing ring pipes (21) are in annular shapes, are clamped on the outer circle of the exhaust manifold (1), and are hollow pipes communicated along the circumferential direction. The first group of vaporizing ring pipes (21) arranged in the axial direction is provided with the fuel inlet (201), and each group of vaporizing ring pipes (21) is communicated with the gas collecting cavity (301) so that the vaporizing ring pipes (21) are sequentially filled with liquid fuel along the axial arrangement direction.

3. The liquid fuel gasification pressure stabilizing device according to claim 2, wherein the gas collecting cylinder (3) is located directly above the exhaust manifold (1) after being fixed, extends upwardly along the axial direction of the exhaust manifold (1) from the air inlet end to the air outlet end of the exhaust manifold (1), and then the gas collecting cavity (301) extends upwardly along the axial direction of the exhaust manifold (1). The top of each group of vaporizing ring pipes (21) extends upwardly so as to be communicated with the bottom surface of the gas collecting cavity (301), and then the liquid fuel in the gas collecting cavity (301) sequentially enters the vaporizing ring pipes (21) arranged in the axial direction.

4. The liquid fuel gasification pressure stabilizing device according to claim 3, wherein the first group of vaporizing ring pipes (21) located at the lowest position of the gas collecting cavity (301) comprises an annular ring pipe body (211) and a gas pipe (212) vertically arranged and communicated with the highest position of the ring pipe body (211). The lowest position of the ring pipe body (211) is provided with the fuel inlet (201). The top end of the gas pipe (212) is communicated with the bottom surface of the gas collecting cavity (301). ​ ​ ​ 5. The liquid fuel gasification pressure stabilizing device according to claim 3, wherein, each of the gasification ring pipes (21) except the first group of gasification ring pipes (21) comprises a ring pipe body (211) and a gas vent pipe (212) and a liquid supplement pipe (213) vertically arranged and respectively communicated with the bottom of the ring pipe body (211) ; the top of the gas vent pipe (212) and the top of the liquid supplement pipe (213) are respectively communicated with the bottom of the gas collection cavity (301), and the position of the liquid supplement pipe (213) of the ring pipe body (211) in the same group communicated with the bottom of the gas collection cavity (301) is lower than the position of the gas vent pipe (212) communicated with the bottom of the gas collection cavity (301), so that the liquid fuel in the gas collection cavity (301) is firstly supplemented into the ring pipe body (211) through the top of the liquid supplement pipe (213) ; the gas vent pipe (212) is used for the gaseous fuel formed by heating and gasification to enter the gas collection cavity (301).

6. The liquid fuel gasification pressure stabilizing device according to claim 5, wherein, the gas vent pipe (212) is a vertical pipe, and the bottom of the gas vent pipe (212) is communicated with the top of the highest position of the ring pipe body (211) ; the liquid supplement pipe (213) is in the shape of "L", and the horizontal pipe of the liquid supplement pipe (213) is communicated with the side wall of the highest position of the ring pipe body (211), and the top of the vertical pipe of the liquid supplement pipe (213) is communicated with the bottom of the gas collection cavity (301).

7. The liquid fuel gasification pressure stabilizing device according to claim 5, wherein, the inner diameter of the gas vent pipe (212) is smaller than the inner diameter of the ring pipe body (211) ; the inner diameter of the liquid supplement pipe (213) is smaller than the inner diameter of the gas vent pipe (212).

8. The liquid fuel gasification pressure stabilizing device according to claim 3, wherein, the fuel outlet (302) is located on the top of the top end of the gas collection cavity (301) ; the liquid fuel gasification pressure stabilizing device further comprises a defoaming mesh plate (4) for defoaming the gaseous fuel, and the defoaming mesh plate (4) is horizontally arranged in the gas collection cavity (301) to divide the gas collection cavity (301) into a gas collection part and a defoaming part communicated with each other, and the fuel outlet (302) is communicated with the defoaming part.

9. The liquid fuel gasification pressure stabilizing device according to claim 1, wherein, the liquid fuel gasification pressure stabilizing device further comprises a temperature detector for detecting the temperature of the gaseous fuel, and the temperature detector is arranged in the gas collection cavity (301) and connected with the engine fuel control system; the fuel outlet (302) is further connected with the engine fuel control system and the exhaust flow channel (101) through pipes, and a gas release valve is arranged in the pipes, and the gas release valve is connected with the engine fuel control system, so that when the pressure or temperature of the gaseous fuel in the gas collection cavity (301) exceeds the system set value, the gas release valve is opened to release the gaseous fuel into the exhaust flow channel (101) ; the oil supply source comprises a liquid oil tank, an oil supply pipeline connected with the liquid oil tank, and a fuel pump arranged in the oil supply pipeline, and the fuel pump is controlled by the engine fuel control system.

10. An aeroengine characterised in that, The liquid fuel gasification pressure stabilizing device according to any one of claims 1-9.

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