Liquid fuel dispensing tank

Abstract

The application discloses a liquid fuel distribution groove, wherein an external fuel passage and an internal fuel passage are respectively separated by a blocking boss and a blocking area; a first fuel supply pipe can supply fuel to the internal fuel passage and the external fuel passage simultaneously; a second through hole is only in fluid communication with the external fuel passage; fuel supplied by the first fuel supply pipe flows into the internal fuel passage through a first through hole and flows forward through each atomizer connecting pipe distributed in a circumferential direction; fuel flowing into the external fuel passage through the first through hole flows reversely and finally flows into a second fuel supply pipe through the second through hole. The liquid fuel distribution groove can adjust fuel temperature simultaneously in the process of supplying fuel to a liquid fuel atomizer, plays a preheating or cooling role, and can also adjust fuel quality, and has simple structure and low manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of gas turbine technology, and in particular to a liquid fuel distribution tank. Background Technology

[0002] A gas turbine is a rotary power machine that uses a continuously flowing gas as its working fluid to convert the heat energy of the working fluid into mechanical work. Compared with traditional internal combustion engines, it has a series of advantages such as simple structure, small size, and light weight for the same power output, and is widely used in energy, power, shipbuilding, military and other fields. A gas turbine is a prime mover that generates power by burning fossil fuels.

[0003] In a gas turbine, the function of the fuel nozzle is to provide sufficient gaseous or liquid fuel to the combustion chamber, allowing the injected fuel to burn completely and release energy. When using liquid fuel, modern gas turbines often use more than one atomizer per nozzle to ensure uniform mixing and atomization of the injected fuel with air. The fuel distribution duct connects the main fuel supply line to each individual atomizer, supplying fuel to the latter.

[0004] With the miniaturization of gas turbines and the widespread adoption of technologies such as regenerative gas turbines, the temperature resistance issues of various parts of the gas turbine have become increasingly prominent. For example, when using a regenerative cycle, the air supply temperature in the combustion chamber may be 200°C higher than that of a conventional cycle. If the liquid fuel supply system, immersed in high-temperature air, does not dissipate heat properly, the fuel inside is prone to coking and carbon buildup, leading to a deterioration in fuel quality, affecting the downstream spray quality, and consequently reducing the overall performance of the gas turbine. This also increases the cost of maintenance and repair of the fuel supply system and shortens the service life of the gas turbine. On the other hand, when the gas turbine is cold-started, all components are in a cold state, and the fuel inside the flow channel cannot receive sufficient wall heat transfer and radiant heating. Its viscosity remains at a high level, which also increases the difficulty of atomization, increases the spray particle size, and affects combustion efficiency.

[0005] Traditional fuel distribution troughs typically have a simple annular structure, simply connecting the main fuel supply line to each atomizer. They lack adequate heat dissipation and cooling design between the fuel passage and surrounding metal components. During high-temperature operation of the gas turbine, this can easily lead to fuel coking due to poor heat dissipation, and thermal deformation of the fuel passage can cause changes in the fuel distribution ratio among the atomizers, affecting spray consistency. Furthermore, the fuel nozzles are deeply embedded inside the gas turbine, close to the flame tube, receiving intense heat radiation and conduction. External ventilation is insufficient for cooling, and there is no separate internal cooling pipeline supplying coolant, making heat dissipation difficult. All these factors make traditional simple annular fuel distribution troughs unsuitable for fuel supply systems of small gas turbines with regenerative thermal cycles and high power density. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a liquid fuel distribution tank that can simultaneously regulate the fuel temperature during the process of supplying fuel to the liquid fuel atomizer, thereby playing a role in preheating or cooling, and also has the function of adjusting fuel quality. It has a simple structure and low manufacturing cost.

[0007] To solve the above-mentioned technical problems, the liquid fuel distribution tank provided by the present invention includes a shell end cap 42, a shell base 41, and a core 50;

[0008] The end cap 42, the base 41, and the core 50 are all circular rings.

[0009] The housing end cap 42 is sealed and fastened to the housing base 41 to form the housing 40;

[0010] A groove with a blocking area 501 is formed in the radial middle of the upper side surface of the core 50.

[0011] A blocking protrusion 502 is formed on the lower side of the bottom of the core 50;

[0012] The core 50 is placed inside the housing 40, and its upper side is sealed and fixed to the lower side of the housing end cap 42.

[0013] The groove on the upper side of the core 50 and the end cap 42 of the shell define an internal fuel channel 62, and the annular internal fuel channel 62 is blocked by the blocking area 501.

[0014] The core 50 has gaps with the near-axial side, far-axial side, and bottom of the housing base 41, as well as the near-axial side wall, far-axial side wall, and bottom plate.

[0015] The core 50, the housing base 41 and the housing end cap 42 together define the external fuel passage 61, and the annular external fuel passage 61 is blocked by the blocking boss 502.

[0016] The blocking region 501 and the blocking protrusion 502 are misaligned in the circumferential direction. Between the blocking region 501 and the blocking protrusion 502 along the circumferential direction, one segment is the adjacent segment 503 and the other segment is the distant segment 504. The central angle corresponding to the adjacent segment 503 is less than 30 degrees. 0 The central angle corresponding to segment 504 is greater than 90 degrees. 0 ;

[0017] The first through hole 63 is provided in the adjacent section 503, connecting the external fuel passage 61 and the internal fuel passage 62;

[0018] The second through hole 64 is located in the remote section 504, connecting to the external fuel passage 61 and is isolated from the internal fuel passage 62;

[0019] The first oil supply pipe 20 is fixedly connected to the housing end cap 42 and fluid-sealedly connected to the first through hole 63;

[0020] The second oil supply pipe 21 is fixedly connected to the end cap 42 of the housing and fluid-sealedly connected to the second through hole 64;

[0021] The bottom of the core 50 has multiple atomizing interfaces 51 formed circumferentially.

[0022] The base plate of the housing 41 has a plurality of atomizing holes 43 that correspond one-to-one with the plurality of atomizing interfaces 51;

[0023] After the core 50 is fixedly connected to the housing base 41, multiple atomizer connecting tubes 70 are respectively sealed and assembled to the corresponding atomizing interface 51 and atomizing hole 43.

[0024] Each atomizer connecting tube 70 is used to connect to the atomizer 80 respectively.

[0025] Preferably, the central angles corresponding to the blocking region 501 and the blocking protrusion 502 are both less than 30°. 0 .

[0026] Preferably, the first oil supply pipe 20 and the second oil supply pipe 21 are detachably fixed to the housing end cap 42.

[0027] Preferably, the first oil supply pipe 20 is fixedly connected to the housing end cover 42 and fluidly seals the first through hole 63 through the first fuel hole opened on the housing end cover 42;

[0028] The second oil supply pipe 21 is fixedly connected to the housing end cap 42 and is fluid-sealed to the second through hole 64 through the second fuel hole opened on the housing end cap 42.

[0029] The first fuel hole and the first through hole 63 coincide in the circumferential position of the core 50;

[0030] The second fuel hole and the second through hole 64 coincide in the circumferential position of the core 50.

[0031] Preferably, a ring of downward protruding ribs 420 is formed in the radial middle of the lower side surface of the end cap 42 of the housing;

[0032] A T-shaped cross-section groove with a blocking area 501 is formed in the radial middle of the upper side of the core 50;

[0033] The core 50 is placed inside the housing 40, and its upper side is sealed and fixed to the lower side of the housing end cap 42. A ring of lower ribs 420 of the housing end cap 42 is sealed and embedded in the upper part of a ring of "T"-shaped cross-section grooves of the core 50.

[0034] The internal fuel passage 62 is defined between a "T"-shaped cross-section groove on the upper side of the core 50 and a lower protruding rib 420 on the end cap 42 of the shell.

[0035] The first through hole 63 passes radially through the lower rib 420 and the upper part of the near-axial and far-axial sidewalls of the "T"-shaped groove of the core 50, connecting the external fuel passage 61 on the near-axial and far-axial sides of the core 50, and connecting the internal fuel passage 62 axially.

[0036] The second through hole 64 passes radially through the lower rib 420 and the upper part of the near-axial and far-axial sidewalls of the "T"-shaped cross-section groove of the core 50, connecting the external fuel passage 61 on the near-axial and far-axial sides of the core 50, and is isolated from the internal fuel passage 62.

[0037] Preferably, the first through hole 63 is divided into a near-axis section, an intermediate section and a far-axis section in the radial direction;

[0038] The near-axial section and far-axial section of the first through hole 63 are formed by splicing semi-circular holes opened on the core 50 and the shell end cap 42.

[0039] The middle section of the first through hole 63 is formed on the lower rib 420 of the end cap 42 of the housing;

[0040] The second through hole 64 is divided into a near-axis section, a middle section and a far-axis section in the radial direction;

[0041] The near-axial section and far-axial section of the second through hole 64 are formed by splicing semi-circular holes opened on the core 50 and the shell end cover 42, and the middle section of the second through hole 64 is formed on the lower rib 420 of the shell end cover 42.

[0042] Preferably, the axial cross-sectional height h of the internal fuel passage 62 gradually decreases along the fuel flow direction, while the width remains constant.

[0043] Preferably, the atomizing interface 51 has an internal thread;

[0044] The atomizing circular hole 43 has the same inner diameter as the atomizing interface 51 and is formed with an internal thread.

[0045] After the core 50 is fixedly connected to the housing base 41, the atomizing hole 43 and the atomizing interface 51 remain concentric.

[0046] Multiple atomizer connecting tubes 70 are respectively threaded and sealed to the corresponding atomizing interface 51 and atomizing round hole 43.

[0047] Preferably, the bottom of the core 50 has a plurality of atomizing interfaces 51 uniformly formed along the circumference.

[0048] Preferably, the first fuel supply pipe 20 and the second fuel supply pipe 21 are respectively connected to the fuel main pipe 23 via external connecting pipe 22;

[0049] A first oil supply pipe control valve 31 and a second oil supply pipe control valve 32 are respectively installed on the external connecting pipe 22 that connects the first oil supply pipe 20 and the second oil supply pipe 21.

[0050] In the liquid fuel distribution tank of the present invention, the external fuel channel 61 and the internal fuel channel 62 are respectively separated by the blocking boss 502 and the blocking area 501, forming an incomplete annular cavity. The liquid fuel flows unidirectionally and in opposite directions inside the external fuel channel 61 and the internal fuel channel 62. The first fuel supply pipe 20 can supply fuel to both the internal fuel channel 62 and the external fuel channel 62 at the same time. The second through hole 64 is fluidly connected only to the external fuel channel 61, so that the second fuel supply pipe 21 can be used to supply fuel and return fuel from the external fuel channel 61. The fuel supplied by the first fuel supply pipe 20 flows into the internal fuel channel 62 through the first through hole 63 and flows forward through the circumferentially distributed atomizer connecting pipes 70, and is sprayed out through the atomizer 80. The fuel flowing into the external fuel channel 61 through the first through hole 63 flows in the reverse direction, and finally flows into the second fuel supply pipe 21 through the second through hole 64 and flows out from there. Because the longer the fuel stays in the nozzle, the more heat conduction and radiation it receives from the metal wall, resulting in a higher temperature, it is known that the fuel temperature at the ends of the internal fuel channel 62 and the external fuel channel 61 is higher than the corresponding beginning (i.e., the inlet) fuel temperature. Furthermore, because the internal flow directions are opposite, the cold fuel near the beginning of the internal fuel channel 62 is heated by the hot fuel at the end of the external channel 61, while the hot fuel at the end of the internal fuel channel 62 is cooled by the cold fuel near the beginning of the external channel 61. This sufficient heat exchange between the two channels ensures good uniformity of liquid fuel temperature in the internal fuel channel 62, guaranteeing the quality of fuel injected by each atomizer 80 and preventing excessively cold or sticky fuel, as well as overheating and coking. This liquid fuel distribution groove can simultaneously regulate fuel temperature during the fuel supply to the liquid fuel atomizer, serving as a preheating or cooling function. It can also adjust fuel quality, has a simple structure, and low manufacturing cost. When used as a fuel distribution groove for gas turbine nozzles, it effectively solves the problems of excessively cold fuel supply during cold starts and excessively hot fuel supply inside the nozzle during long-term operation of small gas turbines. Attached Figure Description

[0051] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1a This is a full sectional view of a liquid fuel distribution tank according to an embodiment of the present invention, through the axis of the first fuel supply pipe;

[0053] Figure 1b This is a full sectional view of a liquid fuel distribution tank according to an embodiment of the present invention, passing through the axis of the second fuel supply pipe;

[0054] Figure 2a This is a top perspective view of a cross-section through the axis of the first fuel pipe in an embodiment of the liquid fuel distribution tank of the present invention.

[0055] Figure 2b This is a top perspective view of a cross-section through the axis of the second fuel pipe in one embodiment of the liquid fuel distribution tank of the present invention;

[0056] Figure 2c This is a top perspective view of a cross-section of the liquid fuel distribution tank of the present invention through the axes of the two atomizers, according to an embodiment of the present invention.

[0057] Figure 3a This is a top perspective view of the core of an embodiment of the liquid fuel distribution tank of the present invention;

[0058] Figure 3b This is a lower perspective view of the core of a liquid fuel distribution tank according to an embodiment of the present invention;

[0059] Figure 4a This is a top view of the housing of the core of an embodiment of the liquid fuel distribution tank of the present invention;

[0060] Figure 4b This is a lower perspective view of the housing of the core of an embodiment of the liquid fuel distribution tank of the present invention.

[0061] Explanation of reference numerals in the attached figures:

[0062] 42 Shell end cap; 41 Shell base; 50 Core; 40 Shell; 501 Blocking area; 502 Blocking boss; 62 Internal fuel passage; 61 External fuel passage; 503 Adjacent section; 504 Distant section; 63 First through hole; 64 Second through hole; 51 Atomizing interface; 43 Atomizing round hole; 70 Atomizer connecting pipe; 80 Atomizer; 420 Lower rib; 20 First fuel supply pipe; 21 Second fuel supply pipe; 22 External connecting pipe; 23 Fuel main pipe; 31 First fuel supply pipe control valve; 32 Second fuel supply pipe control valve. Detailed Implementation

[0063] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0064] Example 1

[0065] like Figure 1a , 1b As shown in 2a, 2b, 2c, 4a, 4b, the liquid fuel distribution tank includes a housing end cap 42, a housing base 41, and a core 50;

[0066] The end cap 42, the base 41, and the core 50 are all circular rings.

[0067] The housing end cap 42 is sealed and fastened to the housing base 41 to form the housing 40;

[0068] like Figure 3a , Figure 3b As shown, a groove with a blocking area 501 is formed in the radial middle of the upper side surface of the core 50.

[0069] A blocking protrusion 502 is formed on the lower side of the bottom of the core 50;

[0070] The core 50 is placed inside the housing 40, and its upper side is sealed and fixed to the lower side of the housing end cap 42.

[0071] The groove on the upper side of the core 50 and the end cap 42 of the shell define an internal fuel channel 62, and the annular internal fuel channel 62 is blocked by the blocking area 501.

[0072] The core 50 has gaps with the near-axial side, far-axial side, and bottom of the housing base 41, as well as the near-axial side wall, far-axial side wall, and bottom plate.

[0073] The core 50, the housing base 41 and the housing end cap 42 together define the external fuel passage 61, and the annular external fuel passage 61 is blocked by the blocking boss 502.

[0074] The blocking region 501 and the blocking protrusion 502 are misaligned in the circumferential direction. Between the blocking region 501 and the blocking protrusion 502 along the circumferential direction, one segment is the adjacent segment 503 and the other segment is the distant segment 504. The central angle corresponding to the adjacent segment 503 is less than 30 degrees. 0 The central angle corresponding to segment 504 is greater than 90 degrees. 0 ;

[0075] The first through hole 63 is provided in the adjacent section 503, connecting the external fuel passage 61 and the internal fuel passage 62;

[0076] The second through hole 64 is located in the remote section 504, connecting to the external fuel passage 61 and is isolated from the internal fuel passage 62;

[0077] The first oil supply pipe 20 is fixedly connected to the housing end cap 42 and fluid-sealedly connected to the first through hole 63;

[0078] The second oil supply pipe 21 is fixedly connected to the end cap 42 of the housing and fluid-sealedly connected to the second through hole 64;

[0079] The bottom of the core 50 has multiple atomizing interfaces 51 formed circumferentially.

[0080] The base plate of the housing 41 has a plurality of atomizing holes 43 that correspond one-to-one with the plurality of atomizing interfaces 51;

[0081] After the core 50 is fixed to the housing base 41 (e.g., by brazing), the multiple atomizer connecting tubes 70 are respectively sealed and assembled to the corresponding atomization interface 51 and atomization hole 43.

[0082] Each atomizer connecting tube 70 is used to connect to the atomizer 80 respectively.

[0083] Preferably, the central angles corresponding to the blocking region 501 and the blocking protrusion 502 are both less than 30°. 0 .

[0084] Preferably, the first oil supply pipe 20 and the second oil supply pipe 21 are detachably fixed to the housing end cap 42.

[0085] The liquid fuel distribution tank of Example 1, such as Figure 3a , 4aAs shown, the external fuel channel 61 and the internal fuel channel 62 are respectively separated by the blocking boss 502 and the blocking area 501, forming an incomplete annular cavity. Liquid fuel flows unidirectionally and in opposite directions inside the external fuel channel 61 and the internal fuel channel 62. The first fuel supply pipe 20 can supply fuel to both the internal fuel channel 62 and the external fuel channel 62 simultaneously. The second through hole 64 is fluidly connected only to the external fuel channel 61, so that the second fuel supply pipe 21 can be used to supply fuel and return fuel from the external fuel channel 61. The fuel supplied by the first fuel supply pipe 20 flows into the internal fuel channel 62 through the first through hole 63. The fuel flows forward through the circumferentially distributed atomizer connecting pipes 70 and is sprayed out through the atomizer 80. The fuel flowing into the external fuel channel 61 through the first through hole 63 flows in the reverse direction and finally flows into the second fuel supply pipe 21 through the second through hole 64 and flows out from there. Because the longer the fuel stays in the nozzle, the more heat conduction and radiation it receives from the metal wall, resulting in a higher temperature, it is known that the fuel temperature at the ends of the internal fuel channel 62 and the external fuel channel 61 is higher than the corresponding beginning (i.e., the inlet) fuel temperature. Furthermore, because the internal flow directions are opposite, the cold fuel near the beginning of the internal fuel channel 62 is heated by the hot fuel at the end of the external channel 61, while the hot fuel at the end of the internal fuel channel 62 is cooled by the cold fuel near the beginning of the external channel 61. This sufficient heat exchange between the two channels ensures good uniformity of liquid fuel temperature in the internal fuel channel 62, guaranteeing the quality of fuel injected by each atomizer 80 and preventing excessively cold or sticky fuel, as well as overheating and coking. This liquid fuel distribution groove can simultaneously regulate fuel temperature during the fuel supply to the liquid fuel atomizer, serving as a preheating or cooling function. It can also adjust fuel quality, has a simple structure, and low manufacturing cost. When used as a fuel distribution groove for gas turbine nozzles, it effectively solves the problems of excessively cold fuel supply during cold starts and excessively hot fuel supply inside the nozzle during long-term operation of small gas turbines.

[0086] Example 2

[0087] Based on the liquid fuel distribution tank of Embodiment 1, the first fuel supply pipe 20 is fixedly connected to the housing end cap 42 and fluidly connected to the first through hole 63 through the first fuel hole opened on the housing end cap 42.

[0088] The second oil supply pipe 21 is fixedly connected to the housing end cap 42 and is fluid-sealed to the second through hole 64 through the second fuel hole opened on the housing end cap 42.

[0089] The first fuel hole and the first through hole 63 coincide in the circumferential position of the core 50;

[0090] The second fuel hole and the second through hole 64 coincide in the circumferential position of the core 50.

[0091] Example 3

[0092] Based on the fuel distribution groove of Embodiment 1, a ring of downward protruding ribs 420 is formed in the radial middle of the lower side of the housing end cap 42;

[0093] A T-shaped cross-section groove with a blocking area 501 is formed in the radial middle of the upper side of the core 50;

[0094] The core 50 is placed inside the housing 40, and its upper side is sealed and fixed to the lower side of the housing end cap 42. A ring of lower ribs 420 of the housing end cap 42 is sealed and embedded in the upper part of a ring of "T"-shaped cross-section grooves of the core 50.

[0095] The internal fuel passage 62 is defined between a "T"-shaped cross-section groove on the upper side of the core 50 and a lower protruding rib 420 on the end cap 42 of the shell.

[0096] The first through hole 63 passes radially through the lower rib 420 and the upper part of the near-axial and far-axial sidewalls of the "T"-shaped groove of the core 50, connecting the external fuel passage 61 on the near-axial and far-axial sides of the core 50, and connecting the internal fuel passage 62 axially.

[0097] The second through hole 64 passes radially through the lower rib 420 and the upper part of the near-axial and far-axial sidewalls of the "T"-shaped cross-section groove of the core 50, connecting the external fuel passage 61 on the near-axial and far-axial sides of the core 50, and is isolated from the internal fuel passage 62.

[0098] Example 4

[0099] Based on the fuel distribution tank 40 of Embodiment 3, such as Figure 1a , 1b As shown in 2a, 2b, 3a, and 3b, the first through hole 63 is divided into a near-axis section, a middle section, and a far-axis section in the radial direction.

[0100] The near-axial section and far-axial section of the first through hole 63 are formed by splicing semi-circular holes opened on the core 50 and the shell end cap 42.

[0101] The middle section of the first through hole 63 is formed on the lower rib 420 of the end cap 42 of the housing;

[0102] The second through hole 64 is divided into a near-axis section, a middle section and a far-axis section in the radial direction;

[0103] The near-axial section and far-axial section of the second through hole 64 are formed by splicing semi-circular holes opened on the core 50 and the shell end cover 42, and the middle section of the second through hole 64 is formed on the lower rib 420 of the shell end cover 42.

[0104] In the fourth embodiment, when processing the first through hole 63 or the second through hole 64 in the fuel distribution groove 40, the corresponding semi-circular holes are first processed on the core 50 and the shell end cap 42, and the middle section of the corresponding through hole is processed on the lower rib 420 of the shell end cap 42. After the core 50 and the shell base 41 are fixedly connected, the shell end cap 42 is directly fixed to both (e.g., by brazing), thus forming the corresponding first through hole 63 and second through hole 64, thereby eliminating the later drilling process and simplifying the processing and manufacturing of the fuel distribution groove.

[0105] Example 5

[0106] Based on the fuel distribution tank 40 of Embodiment 1, such as Figure 1b , 3a As shown, the axial cross-sectional height h of the internal fuel passage 62 gradually decreases along the fuel flow direction, while the width remains constant.

[0107] The axial cross-sectional height h of the internal fuel passage 62 gradually decreases linearly along the fuel flow direction, while the cross-sectional width remains unchanged. This allows the cross-sectional area of ​​the internal fuel passage 62 to decrease linearly.

[0108] Because the fuel flows unidirectionally within the internal fuel channel 62, and the flow rate decreases accordingly each time it passes through an atomizer 80, this design ensures that the flow velocity of the fuel is similar throughout the internal fuel channel 62, thereby ensuring good spray consistency among the atomizers 80.

[0109] Example 6

[0110] Based on the fuel distribution tank 40 of Embodiment 1, such as Figure 2c , 3b As shown in 4b, the atomizing interface 51 has an internal thread;

[0111] The atomizing circular hole 43 has the same inner diameter as the atomizing interface 51 and is formed with an internal thread.

[0112] After the core 50 is fixed to the housing base 41 (e.g., by brazing), the atomizing hole 43 and the atomizing interface 51 remain concentric.

[0113] Multiple atomizer connecting tubes 70 are respectively threaded and sealed to the corresponding atomizing interface 51 and atomizing round hole 43.

[0114] Preferably, the bottom of the core 50 has a plurality of atomizing interfaces 51 uniformly formed along the circumference.

[0115] In Embodiment Six, the fuel in the fuel distribution slot 40 and the external channel 61 will not leak through the atomizing hole 43 on the bottom plate of the housing base 41, while also facilitating the disassembly of the atomizer connecting pipe 70.

[0116] Example 7

[0117] Based on the fuel distribution tank 40 of Embodiment 1, such as Figure 2b As shown, the first fuel supply pipe 20 and the second fuel supply pipe 21 are respectively connected to the fuel main pipe 23 via the external connecting pipe 22;

[0118] A first oil supply pipe control valve 31 and a second oil supply pipe control valve 32 are respectively installed on the external connecting pipe 22 that connects the first oil supply pipe 20 and the second oil supply pipe 21.

[0119] In the fuel distribution tank 40 of Embodiment 7, the first fuel supply pipe 20 and the second fuel supply pipe 21 are controlled by the first fuel supply pipe control valve 31 and the second fuel supply pipe control valve 32, respectively, to control the fuel supply pressure or fuel supply flow. By controlling the fuel supply pressure of the first fuel supply pipe 20 and the second fuel supply pipe 21 through the control valves 31 and 32, the fuel distribution valve can operate in one of the following three states: a) the first fuel supply pipe 20 supplies fuel and the second fuel supply pipe 21 returns fuel; b) the second fuel supply pipe 21 supplies fuel and the first fuel supply pipe 20 is blocked; c) the first and second fuel supply pipes 20 and 21 supply fuel simultaneously. In state a), the fuel flowing through the external fuel channel 61 is not supplied to the atomizer 80, but flows directly out from the second fuel supply pipe 21. This can remove the heat from the outside and prevent the fuel in the internal fuel channel 62 from overheating and coking. This not only prevents the fuel in the internal channel 62 from overheating and coking, but also provides a certain amount of preheating for the fuel therein. In state b), the fuel supplied to all atomizers 80 needs to first flow through the external fuel channel 61, and then be distributed to each atomizer 80 through the internal fuel channel 62. At this time, the fuel flow path is doubled, which can provide good preheating for the subcooled fuel in the internal fuel channel 62. When the supplied fuel is subcooled, it can ensure that the fuel absorbs more heat from the outside and reduces the fuel viscosity. In state c), the fuel supply ratio of the two fuel supply pipes can be continuously adjusted to modulate the fuel temperature at the atomizer outlet. The preheating-cooling effect of the fuel distribution slot can be dynamically adjusted, and the fuel supply temperature can be adjusted as needed to dynamically adapt to different operating conditions of the gas turbine.

[0120] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A liquid fuel distribution tank, characterized in that, It includes a housing end cap (42), a housing base (41), and a core (50); The end cap (42), the base (41), and the core (50) of the housing are all annular; The end cap (42) of the housing is sealed and fastened to the housing base (41) to form the housing (40); The upper side surface of the core (50) has a groove with a blocking area (501) formed in the radial middle along the circumferential direction; A blocking protrusion (502) is formed on the lower side of the bottom of the core (50); The core (50) is placed inside the housing (40), and its upper side is sealed and fixed to the lower side of the housing end cap (42); The groove on the upper side of the core (50) defines an internal fuel passage (62) between the shell end cap (42) and the annular internal fuel passage (62) is blocked by the blocking area (501); The core (50) has gaps with the near-axial side, far-axial side and bottom of the housing base (41) and the near-axial side wall, far-axial side wall and bottom plate; The core (50), the housing base (41) and the housing end cap (42) together define the external fuel passage (61), and the annular external fuel passage (61) is blocked by the blocking boss (502); The blocking area (501) and the blocking protrusion (502) are misaligned in the circumferential direction. Between the blocking area (501) and the blocking protrusion (502) in the circumferential direction, one segment is the adjacent segment (503) and the other segment is the distant segment (504). The central angle corresponding to the adjacent segment (503) is less than 30 degrees. 0 The central angle corresponding to the segment (504) is greater than 90 degrees. 0 ; The first through hole (63) is provided in the adjacent section (503) and connects the external fuel passage (61) and the internal fuel passage (62); The second through hole (64) is located in the far section (504), connecting to the external fuel passage (61) and is isolated from the internal fuel passage (62); The first oil supply pipe (20) is fixedly connected to the housing end cap (42) and fluid-sealedly connected to the first through hole (63); The second oil supply pipe (21) is fixedly connected to the end cap (42) of the housing and fluid-sealedly connected to the second through hole (64); The core (50) has multiple atomizing ports (51) formed circumferentially at its bottom; The base plate of the housing (41) has a plurality of atomizing holes (43) corresponding one-to-one with the plurality of atomizing interfaces (51); After the core (50) is fixed to the housing base (41), multiple atomizer connecting pipes (70) are sealed and assembled to the corresponding atomizing interface (51) and atomizing hole (43) respectively. Each atomizer connecting tube (70) is used to connect to the atomizer (80) respectively.

2. The liquid fuel distribution tank according to claim 1, characterized in that, The central angles corresponding to the blocking region (501) and the blocking protrusion (502) are both less than 30°. 0 .

3. The liquid fuel distribution tank according to claim 1, characterized in that, The first oil supply pipe (20) and the second oil supply pipe (21) are detachably fixed to the housing end cap (42).

4. The liquid fuel distribution tank according to claim 1, characterized in that, The first oil supply pipe (20) is fixedly connected to the housing end cap (42) and fluid-sealedly connected to the first through hole (63) through the first fuel hole opened on the housing end cap (42); The second oil supply pipe (21) is fixedly connected to the housing end cap (42) and fluid-sealedly connected to the second through hole (64) through the second fuel hole opened on the housing end cap (42); The first fuel hole and the first through hole (63) coincide in the circumferential position of the core (50); The second fuel hole and the second through hole (64) coincide in the circumferential position of the core (50).

5. The liquid fuel distribution tank according to claim 1, characterized in that, A ring of downward protruding ribs (420) is formed in the radial middle of the lower side of the end cap (42) of the housing; A "T"-shaped cross-section groove with a blocking area (501) is formed in the radial middle of the upper side of the core (50); The core (50) is placed inside the housing (40), and its upper side is sealed and fixed to the lower side of the housing end cap (42). A ring of lower ribs (420) of the housing end cap (42) is sealed and embedded in the upper part of a ring of "T"-shaped cross-section groove of the core (50). The internal fuel passage (62) is defined by a "T"-shaped cross-section groove on the upper side of the core (50) and a lower rib (420) on the end cap (42) of the shell. The first through hole (63) passes radially through the lower rib (420) and the upper part of the near-axial and far-axial sidewalls of the "T"-shaped groove of the core (50), connecting the external fuel passage (61) of the near-axial and far-axial sides of the core (50), and connecting the internal fuel passage (62) axially. The second through hole (64) passes radially through the lower rib (420) and the upper part of the near-axis and far-axis sidewalls of the "T"-shaped groove of the core (50), connecting the external fuel passage (61) of the near-axis and far-axis sides of the core (50), and is isolated from the internal fuel passage (62).

6. The liquid fuel distribution tank according to claim 5, characterized in that, The first through hole (63) is divided into a near-axis section, a middle section and a far-axis section in the radial direction; The near-axial section and far-axial section of the first through hole (63) are formed by splicing semi-circular holes opened on the core (50) and the shell end cap (42); The middle section of the first through hole (63) is formed on the lower rib (420) of the end cap (42) of the housing; The second through hole (64) is divided into a near-axis section, a middle section and a far-axis section in the radial direction; The near-axial section and far-axial section of the second through hole (64) are formed by splicing semi-circular holes opened on the core (50) and the shell end cap (42), and the middle section of the second through hole (64) is formed on the lower rib (420) of the shell end cap (42).

7. The liquid fuel distribution tank according to claim 1, characterized in that, The axial cross-sectional height of the internal fuel passage (62) gradually decreases along the fuel flow direction, while the width remains constant.

8. The liquid fuel distribution tank according to claim 1, characterized in that, The atomizing interface (51) is formed with internal threads; The atomizing circular hole (43) has the same inner diameter as the atomizing interface (51) and is formed with an internal thread; After the core (50) is fixed to the housing base (41), the atomizing hole (43) and the atomizing interface (51) remain concentric; Multiple atomizer connecting tubes (70) are respectively threaded and sealed to the corresponding atomizing interface (51) and atomizing hole (43).

9. The liquid fuel distribution tank according to claim 1, characterized in that, The core (50) has multiple atomizing interfaces (51) uniformly formed circumferentially at its bottom.

10. The liquid fuel distribution tank according to claim 1, characterized in that, The first oil supply pipe (20) and the second oil supply pipe (21) are respectively connected to the fuel main pipe (23) via external connecting pipe (22); A first oil supply pipe control valve (31) and a second oil supply pipe control valve (32) are respectively installed on the external connecting pipe (22) that connects the first oil supply pipe (20) and the second oil supply pipe (21).

Images