Dual-fuel nozzle, debugging device and debugging method

Abstract

The present disclosure provides a dual-fuel nozzle, a debugging device and a debugging method, the dual-fuel nozzle comprising: a secondary oil circuit, comprising: a secondary oil circuit adapter, comprising a first tube shell; a swirl core, the third end of which is connected to the second end of the first tube shell, the side surface of the third end is provided with a slot, and the outer side surface is provided with a first swirl groove; a secondary oil circuit cap, which is provided on the swirl core, the secondary oil circuit cap is provided with a secondary nozzle, and the outer side surface is provided with a second swirl groove; a main oil circuit, comprising: a main oil circuit adapter, comprising a second tube shell; a main oil circuit cap, one end of which is connected to the fifth end of the second tube shell, and the other end is provided with a main nozzle; a gaseous fuel circuit, comprising: an outer gas cover, which is provided on the main oil circuit cap, the sixth end of the outer gas cover is suitable for connecting to a gas pipeline, the inner side wall of the outer gas cover and the outer side wall of the main oil circuit cap form a gaseous fuel channel, and the seventh end of the outer gas cover is provided with a gaseous fuel nozzle.

Description

Technical Field

[0001] The present disclosure relates to the field of nozzle testing, and in particular to a dual-fuel nozzle, a flow rate debugging device, and a debugging method. Background Art

[0002] Natural gas, as a high-calorific-value fuel, is a premium fuel for gas turbine power generation. However, with rising natural gas prices, natural gas-fueled gas turbines are gradually losing market share. Many industrial sectors, such as the petroleum and chemical industries, produce large quantities of medium- and low-calorific-value gaseous fuels, such as coke oven gas, blast furnace gas, and chemical exhaust, while producing their primary products. These byproducts are being actively utilized by companies to generate electricity and generate profits. However, due to the quality issues and unstable gas production of these medium- and low-calorific-value gaseous fuels, gas turbines rely on liquid fuels (such as diesel) for ignition and normal operation. This requires gas turbines to use dual-fuel nozzles, igniting with the higher-calorific-value liquid fuel for startup and then switching to the medium- and low-calorific-value fuel. This allows for the efficient combustion of gases with varying calorific values ​​and compositions without compromising performance. Furthermore, emissions must be minimized while ensuring stable combustion to meet environmental standards.

[0003] Most existing dual-fuel nozzles utilize a complex casting or forging process, followed by machining, requiring high precision and a complex process flow. The nozzle is assembled from a housing and precision components (swirl core, auxiliary nozzle, and main nozzle) that control flow and other characteristics. To ensure flow rates, these precision components require flow pre-tuning before welding. If the pre-tuning fails, disassembly and polishing of the nozzle or swirl trough are necessary. After completion, the nozzle must be reassembled and re-tuned, requiring multiple cycles of flow tuning, a significant workload. Summary of the Invention

[0004] In order to solve the above technical problems, the embodiments of the present disclosure provide a dual-fuel nozzle, a debugging device and a debugging method, which can provide a dual-fuel nozzle with a simple structure, a debugging device and a debugging method with simple adjustment and assembly, which can quickly complete flow debugging and reduce workload.

[0005] According to an embodiment of one aspect of the present disclosure, there is provided a dual-fuel nozzle, comprising:

[0006] Auxiliary oil circuit, including:

[0007] The auxiliary oil circuit adapter comprises a first tube shell, wherein a first end of the first tube shell is suitable for connecting to the auxiliary oil guide pipe;

[0008] A swirl core, the third end of which is connected to the second end of the first tube shell, the side of the swirl core close to the third end is provided with a groove, and the outer side of the swirl core is provided with a first swirl groove;

[0009] A secondary oil circuit cap is provided on the swirl core, wherein the inner side wall of the secondary oil circuit cap and the outer side wall of the swirl core enclose a first swirl chamber, the secondary oil circuit cap is provided with a secondary nozzle, and the outer side surface of the secondary oil circuit cap is provided with a second swirl groove;

[0010] Main oil circuit, including:

[0011] A main oil circuit adapter includes a second tube shell, the second tube shell is sleeved on a portion of the first tube shell near the first end, and the fourth end of the second tube shell is suitable for connecting to the main oil pipe;

[0012] A main oil circuit cap, one end of which is connected to the fifth end of the second tube shell and the other end of which is provided with a main nozzle, wherein the inner side surface of the main oil circuit cap and the outer side surface of the auxiliary oil circuit cap form a second swirl chamber;

[0013] Gaseous fuel circuit, including:

[0014] The outer gas hood is arranged on the main oil circuit cap cover, the sixth end of the outer gas hood is suitable for connecting to the gas pipeline, the inner wall of the outer gas hood and the outer wall of the main oil circuit cap cover are arranged to form a gaseous fuel channel, and the seventh end of the outer gas hood is provided with a gaseous fuel nozzle.

[0015] According to some embodiments of the present disclosure, the gaseous fuel circuit further comprises:

[0016] An inner air cover is mounted on the main oil circuit cap, with a plurality of partition blocks spaced apart on the outer side of the inner air cover. The partition blocks are provided with a purge air passage. The inner side of the inner air cover and the outer side of the main oil circuit cap form an annular passage for the purge air and an annular nozzle is formed at the front end to assist in atomizing the fuel in the main oil circuit and removing carbon deposits.

[0017] The inner side wall of the outer air hood abuts against the upper surface of the partition block, and the outer side surface of the outer air hood is provided with a purge air inlet adapted to the purge air channel at intervals, and the inner side wall of the outer air hood and the outer side wall of the inner air hood enclose the gaseous fuel channel.

[0018] According to some embodiments of the present disclosure, the main nozzle is in the shape of a bell mouth.

[0019] According to some embodiments of the present disclosure, a first solder filling groove is provided on the first tube shell for brazing connection with the nozzle housing, and a second solder filling groove is provided on the second tube shell for brazing connection with the nozzle housing.

[0020] According to some embodiments of the present disclosure, a circular boss is provided on the first tube shell, and the side surface of the circular boss is sealedly connected to the end surface of the root of the auxiliary oil circuit cap to seal the auxiliary oil circuit channel.

[0021] According to some embodiments of the present disclosure, a positioning plate is provided on the first tube shell, and the positioning plate is suitable for limiting the axial position of the secondary oil circuit adapter, wherein a notch is provided on the positioning plate for allowing the main oil circuit fuel to pass through.

[0022] According to another embodiment of the present disclosure, a dual-fuel nozzle debugging device is provided, comprising:

[0023] As the aforementioned dual fuel nozzle;

[0024] Auxiliary oil flow debugging components, including:

[0025] The auxiliary oil inlet base is a cylindrical structure, one end of which is sealingly sleeved on the first end of the first tube shell, and the other end of which is provided with an auxiliary oil inlet nozzle for connecting to the oil supply system, and the side surface of the auxiliary oil inlet base away from the auxiliary oil inlet nozzle is provided with an external thread;

[0026] a restriction ring, sleeved on the circular boss of the first tube shell, wherein a sealing ring is provided in a space defined by the restriction ring, the auxiliary oil circuit cap, and the first tube shell;

[0027] The auxiliary pressure cover is a cylindrical structure. The inner side surface of one end of the auxiliary pressure cover is provided with an internal thread that is compatible with the external thread on the auxiliary oil inlet base. The auxiliary pressure cover is threadedly connected to the auxiliary oil inlet base. The other end of the auxiliary pressure cover extends radially inward to form a secondary end plate. The inner side surface of the secondary end plate abuts against the front end of the auxiliary oil circuit cap to press the auxiliary oil circuit cap against the sealing ring to form a sealed connection with the first tube shell.

[0028] According to some embodiments of the present disclosure, the debugging device further includes a main oil circuit flow debugging component, and the main oil circuit flow debugging component includes:

[0029] a main oil inlet base having a cylindrical structure, one end of which is sealedly connected to the first end of the first tube shell, and the other end of which is sealedly connected to the fourth end of the second tube shell; a main oil inlet nozzle is provided on the main oil inlet base, and the main oil inlet nozzle is used to connect to the oil supply system; an external thread is provided on the outer surface of the end of the main oil inlet base near the fourth end; and

[0030] The main pressure cover is a cylindrical structure. The inner side surface of one end of the main pressure cover is provided with an internal thread that is compatible with the external thread on the main oil inlet base. The main pressure cover is threadedly connected to the main oil inlet base. The other end of the main pressure cover extends radially inward to form a main end plate. The inner side surface of the main end plate abuts against the main oil circuit cap so that the main oil circuit cap forms a sealed connection with the second tube shell. The main pressure cover and the main oil circuit cap are sealed.

[0031] According to some embodiments of the present disclosure, the debugging device further includes a gaseous fuel line flow debugging component, and the gaseous fuel line flow debugging component includes:

[0032] The ring tube has an air inlet nozzle at one end and the other end of the ring tube is sealed and connected to the outer air cover.

[0033] A central plug, the outer wall of which is sealedly connected to the inner wall of the inner air cover, the end away from the gaseous fuel nozzle extends radially outward to form a support plate, the support plate is sealed to the inner wall of the annular tube, the outer wall of the central plug, the annular tube, the support plate and the outer air cover jointly define an annular fuel flow channel, the support plate and the air inlet nozzle form a fuel chamber in the annular tube, and the support plate is provided with a flow hole connecting the fuel chamber and the fuel flow channel.

[0034] According to another embodiment of the present disclosure, a method for debugging the flow rate of a dual-fuel nozzle is provided. The method is applicable to the aforementioned dual-fuel nozzle and includes:

[0035] Flow debugging of auxiliary oil circuit, including:

[0036] S101: Connect the auxiliary oil circuit flow debugging component to the auxiliary oil circuit of the dual-fuel nozzle;

[0037] S102: Connect the auxiliary oil inlet nozzle of the auxiliary oil inlet base to the oil supply system and start the oil supply system;

[0038] S103: Adjust the oil supply pressure so that the oil pressure at the auxiliary oil inlet nozzle reaches the preset value and record the fuel flow rate;

[0039] S104: If the fuel flow rate is within the qualified range, the debugging is qualified; if the fuel flow rate is less than the minimum value of the qualified range, the first swirl groove and the slot are ground, and operations S101 to S104 are repeated; if the fuel flow rate is greater than the maximum value of the qualified range, the machine is scrapped;

[0040] Flow debugging of the main oil circuit, including:

[0041] S201: Connect the main oil circuit flow debugging component to the main oil circuit of the dual-fuel nozzle;

[0042] S202: Connect the main oil inlet nozzle of the main oil inlet base to the oil supply system and start the oil supply system;

[0043] S203: Adjust the oil supply pressure so that the oil pressure at the main oil inlet nozzle reaches the preset value, and record the fuel pressure.

[0044] Oil flow rate;

[0045] S204: If the fuel flow rate is within the qualified range, the debugging is qualified; if the fuel flow rate is less than the minimum value of the qualified range, the second swirl groove is ground and operations S101 to S104 are performed again; if the fuel flow rate is greater than the maximum value of the qualified range, the machine is scrapped;

[0046] as well as

[0047] Gas flow debugging, including:

[0048] S301: Connecting the gaseous fuel path flow rate debugging component to the gaseous fuel path of the dual-fuel nozzle;

[0049] S302, connecting the air inlet nozzle to the air supply system and turning on the air supply system;

[0050] S303: Adjust the air supply pressure so that the air pressure at the air inlet nozzle reaches a preset value and record the air flow rate;

[0051] S304: If the air flow rate is within the qualified range, the debugging is qualified; if the air flow rate is less than the minimum value of the qualified range, the gaseous fuel nozzle is ground and operations S301 to S304 are performed again; if the air flow rate is greater than the maximum value of the qualified range, it is scrapped.

[0052] The dual-fuel nozzle according to the embodiment of the present disclosure can be installed and debugged quickly and conveniently, thereby improving the accuracy and work efficiency of debugging the flow rates of the main and auxiliary oil circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic structural diagram of a secondary oil circuit of a dual-fuel nozzle according to an exemplary embodiment of the present disclosure;

[0054] Figure 2 is a structural schematic diagram of a main oil circuit of a dual-fuel nozzle according to an exemplary embodiment of the present disclosure;

[0055] Figure 3 is a schematic structural diagram of a gaseous fuel path of a dual-fuel nozzle according to an exemplary embodiment of the present disclosure;

[0056] Figure 4 yes Figure 1 A cross-sectional view of the auxiliary oil circuit flow rate debugging assembly of the auxiliary oil circuit shown;

[0057] Figure 5 yes Figure 2 A cross-sectional view of the main oil flow debugging assembly of the main oil circuit shown; and

[0058] Figure 6 yes Figure 3 A cross-sectional view of the gaseous fuel flow debugging assembly of the secondary oil circuit is shown.

[0059] In the above drawings, the meanings of the reference numerals are as follows:

[0060] 1- auxiliary oil circuit;

[0061] 11- auxiliary oil circuit adapter;

[0062] 111-first solder filling tank;

[0063] 112-positioning plate;

[0064] 113-Gap;

[0065] 114-round shoulder;

[0066] 12- swirl core;

[0067] 121-slot;

[0068] 122-first swirl trough;

[0069] 13- auxiliary oil circuit cap;

[0070] 131- second swirl trough;

[0071] 132- auxiliary nozzle; 2- main oil circuit;

[0072] 21-main oil circuit adapter;

[0073] 211-second solder filling tank;

[0074] 22-main oil circuit cap;

[0075] 221-main nozzle; 3-gaseous fuel path;

[0076] 31-Inner air hood;

[0077] 311-purge air channel;

[0078] 312-Gaseous fuel channel;

[0079] 313-annular nozzle;

[0080] 32-external air cover;

[0081] 321-purge air channel;

[0082] 322-gaseous fuel nozzle; 4-auxiliary oil flow debugging component;

[0083] 41- auxiliary oil inlet base;

[0084] 411- auxiliary oil inlet nozzle;

[0085] 412-Inner side of auxiliary oil inlet base;

[0086] 413-first external thread;

[0087] 414-end face;

[0088] 42- auxiliary gland;

[0089] 421-secondary end plate;

[0090] 422-first internal thread;

[0091] 43-restriction ring;

[0092] 44-first sealing ring;

[0093] 45- second sealing ring;

[0094] 5- Main oil flow debugging component;

[0095] 51-main oil inlet base;

[0096] 511-main oil inlet nozzle;

[0097] 512-Oil pipeline;

[0098] 513-first medial surface;

[0099] 514-second medial surface;

[0100] 515-second external thread;

[0101] 52-main gland;

[0102] 521-main end plate;

[0103] 522-inner side of main gland;

[0104] 523-second internal thread;

[0105] 53-third sealing ring;

[0106] 54- fourth sealing ring;

[0107] 55-fifth sealing ring; 6-gaseous fuel flow rate debugging component;

[0108] 61-ring tube;

[0109] 601- fuel chamber;

[0110] 602- fuel flow channel;

[0111] 62-Center plug;

[0112] 63-air intake nozzle;

[0113] 64-support plate;

[0114] 65-flow hole;

[0115] 66-sixth sealing ring;

[0116] 67-seventh sealing ring;

[0117] 68-fixing screw; and

[0118] 69-Rubber pad. DETAILED DESCRIPTION

[0119] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0120] However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known technologies are omitted to avoid unnecessarily confusing the concepts of the present disclosure.

[0121] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The term "comprising" used herein indicates the presence of features, steps, operations, but does not exclude the presence or addition of one or more other features.

[0122] When expressions such as “at least one of A, B, and C, etc.” are used, they should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art (e.g., “a system having at least one of A, B, and C” should include but is not limited to systems having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, and C, etc.). When expressions such as “at least one of A, B, or C, etc.” are used, they should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art (e.g., “a system having at least one of A, B, or C” should include but is not limited to systems having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, and C, etc.).

[0123] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0124] Figure 1 is a schematic structural diagram of a secondary oil circuit of a dual-fuel nozzle according to an exemplary embodiment of the present disclosure; Figure 2 is a structural schematic diagram of a main oil circuit of a dual-fuel nozzle according to an exemplary embodiment of the present disclosure; Figure 3 Schematic diagram of the structure of a gaseous fuel path of a dual-fuel nozzle according to an exemplary embodiment of the present disclosure.

[0125] In order to solve the above technical problems, the present invention discloses an embodiment of one aspect, such as Figures 1 to 3 As shown, a dual-fuel nozzle is provided, comprising an auxiliary oil circuit 1, a main oil circuit 2 and a gaseous fuel circuit 3. The auxiliary oil circuit 1 comprises an auxiliary oil circuit adapter 11, a swirl core 12 and an auxiliary oil circuit cap 13. The auxiliary oil circuit adapter 11 comprises a first tube shell, the first end of which is suitable for connecting to the auxiliary oil guide pipe. The third end of the swirl core 12 is connected to the second end of the first tube shell. A groove 121 is provided on the side of the swirl core 12 near the third end, and a first swirl groove 122 is provided on the outer side of the swirl core 12. The auxiliary oil circuit cap 13 is provided on the swirl core 12. The inner side wall of the auxiliary oil circuit cap 13 and the outer side wall of the swirl core 12 enclose a first swirl chamber. A secondary nozzle 132 is provided on the auxiliary oil circuit cap 13, and a second swirl groove 131 is provided on the outer side of the auxiliary oil circuit cap 13. The main oil circuit 2 comprises a main oil circuit adapter 21 and a main oil circuit cap 22. The main oil circuit adapter 21 includes a second tube shell, which is mounted on a portion of the first tube shell near the first end. The fourth end of the second tube shell is suitable for connecting to the main oil pipe. One end of the main oil circuit cap 22 is connected to the fifth end of the second tube shell, and the other end is provided with a main nozzle 221. The inner side surface of the main oil circuit cap 22 and the outer side surface of the auxiliary oil circuit cap 13 enclose a second swirl chamber. The gaseous fuel circuit 3 includes an outer gas cover 32, which is mounted on the main oil circuit cap 22. The sixth end of the outer gas cover 32 is suitable for connecting to the gas pipeline. The inner side wall of the outer gas cover 32 and the outer side wall of the main oil circuit cap 22 enclose a gaseous fuel channel 312. The seventh end of the outer gas cover 32 is provided with a gaseous fuel nozzle 312.

[0126] According to some embodiments of the present disclosure, auxiliary oil circuit 1 is primarily used for ignition, main oil circuit 2 is used to increase the engine load to a certain power level, switch to gaseous fuel operation, or use the main oil circuit alone to achieve a certain intermediate load (or full load) state. Gaseous fuel circuit 3 is primarily used to provide gaseous fuel, which is used alone to achieve full load operation of the engine. Gaseous fuels include, but are not limited to, natural gas and coke oven gas.

[0127] In this embodiment, through the structure and connection method of the auxiliary oil circuit 1, the main oil circuit 2 and the gaseous fuel circuit 3, installation and debugging can be completed quickly and conveniently, thereby improving the accuracy and work efficiency of the main and auxiliary oil circuit flow debugging.

[0128] According to some embodiments of the present disclosure, the gaseous fuel circuit 3 also includes an inner air hood 31, which is arranged on the main oil circuit cap 22, and a plurality of partition blocks are arranged at intervals on the outer side surface of the inner air hood 31, and a purge air channel 311 is arranged on the partition block. The inner side surface of the inner air hood 31 and the outer side surface of the main oil circuit cap 22 are arranged to form an annular channel for purge air and an annular nozzle 313 is formed at the front end to assist the atomization of the main oil circuit fuel and remove carbon deposits; wherein, the inner side wall of the outer air hood 32 is against the upper surface of the partition block, and the outer side surface of the outer air hood 32 is arranged at intervals with a purge air inlet adapted to the purge air channel 311, and the inner side wall of the outer air hood 32 and the outer side wall of the inner air hood 31 are arranged to form a gaseous fuel channel 312.

[0129] In this embodiment, the dual-fuel nozzle provided by the present disclosure adapts to a wide range of fuel flow changes, while taking into account the fuel atomization quality under high and low loads, and can effectively solve problems such as ignition difficulty, unstable combustion, and decreased combustion efficiency under low load.

[0130] According to some embodiments of the present disclosure, slots 121 are used to allow fuel from the secondary oil circuit to pass through. First swirl grooves 122 are used to accelerate and rotate the fuel from the secondary oil circuit, generating tangential momentum. This allows the fuel to form a fine atomization due to centrifugal force when it is sprayed. Second swirl grooves 131 are used to generate tangential momentum and rotational acceleration for the fuel from the primary oil circuit, which is then sprayed out of the primary nozzle 221.

[0131] According to some embodiments of the present disclosure, the main nozzle 221 is shaped like a bell mouth.

[0132] According to some embodiments of the present disclosure, a first solder filling groove 111 is provided on the first tube shell for brazing connection with the nozzle housing, and a second solder filling groove 211 is provided on the second tube shell for brazing connection with the nozzle housing.

[0133] According to some embodiments of the present disclosure, a circular boss 113 is provided on the first tube housing. The side surface of the circular boss 114 is sealedly connected to the end surface of the base of the auxiliary oil circuit cap 13 to seal the auxiliary oil circuit. Optionally, the circular boss 114 and the auxiliary oil circuit cap 13 are connected by argon arc welding to seal the auxiliary oil circuit.

[0134] According to some embodiments of the present disclosure, a positioning plate 112 is provided on the first tube shell, and the positioning plate 112 is suitable for limiting the axial position of the auxiliary oil circuit adapter 11, wherein a notch 113 is provided on the positioning plate 112 for allowing the main oil circuit fuel to pass through.

[0135] According to some optional embodiments of the present disclosure, the notch 113 is a half-moon-shaped notch.

[0136] Figure 4 yes Figure 1 A cross-sectional view of the auxiliary oil circuit flow rate debugging assembly of the auxiliary oil circuit shown; Figure 5 yes Figure 2 A cross-sectional view of the main oil circuit flow debugging assembly of the main oil circuit is shown; Figure 6 yes Figure 3 A cross-sectional view of the gaseous fuel flow debugging assembly of the secondary oil circuit is shown.

[0137] According to another embodiment of the present disclosure, a dual fuel nozzle debugging device is also provided. Figures 4 to 6 As shown, the debugging device includes the aforementioned dual-fuel nozzle, the secondary oil path flow debugging component 4, the main oil path flow debugging component 5 and the gaseous fuel path flow debugging component 6.

[0138] According to some embodiments of the present disclosure, the secondary oil circuit flow rate debugging assembly 4 includes a secondary oil inlet base 41 , a restriction ring 43 and a secondary pressure cover 42 .

[0139] The auxiliary oil inlet base 41 is a cylindrical structure. One end of the auxiliary oil inlet base 41 is sealingly sleeved on the first end of the first tube shell. Optionally, a first sealing ring 44 is provided between the auxiliary oil inlet base 41 and the first end of a tube shell. The other end of the auxiliary oil inlet base 41 is provided with an auxiliary oil inlet nozzle 411 for connecting to the oil supply system. A first external thread 413 is provided on the side of the auxiliary oil inlet base 41 away from the auxiliary oil inlet nozzle 411.

[0140] A restriction ring 43 is mounted on the circular shoulder 113 of the first housing. A second sealing ring 45 is located within the space defined by the restriction ring 43, the auxiliary oil circuit cap 13, and the first housing. The restriction ring 43 is positioned outside the circular shoulder 114 of the auxiliary oil circuit adapter 11 to limit radial deformation of the second sealing ring 45 and prevent it from rupturing or slipping.

[0141] The auxiliary pressure cover 42 is a cylindrical structure. The inner side surface of one end of the auxiliary pressure cover 42 is provided with a first internal thread 422 that is compatible with the first external thread 413 on the auxiliary oil inlet base 41. The auxiliary pressure cover 42 is screwed to the auxiliary oil inlet base 41. The other end of the auxiliary pressure cover 42 extends radially inward to form a secondary end plate 421. The inner side surface of the secondary end plate 421 abuts against the front end of the auxiliary oil circuit cap 13, so as to abut the auxiliary oil circuit cap 13 against the second sealing ring 45 to form a sealed connection with the first tube shell.

[0142] According to some embodiments of the present disclosure, the end surface 414 of the secondary oil inlet base 41 presses against the positioning plate 112 of the secondary oil circuit adapter 11 to define the axial position of the secondary oil circuit adapter 11 .

[0143] According to some embodiments of the present disclosure, the inner surface 412 of the auxiliary oil inlet base forms a cylindrical sealing surface with the auxiliary oil circuit adapter 11, and the first sealing ring 44 is arranged in the solder filling groove 111 on the auxiliary oil circuit adapter 11, and is deformed and sealed by being extruded by the inner surface 412 of the auxiliary oil inlet base.

[0144] In this embodiment, thanks to the presence of two sealing surfaces, fuel enters the commissioning device from secondary oil inlet nozzle 411, then passes through secondary oil circuit adapter 11, through slots 121 and first swirl grooves 122 on swirl core 12, and ultimately is ejected from secondary nozzle 132. The secondary oil circuit flow rate commissioning assembly features a simple principle, reliable sealing, and easy assembly and disassembly, significantly improving the efficiency of secondary oil circuit flow rate commissioning.

[0145] According to some embodiments of the present disclosure, the debugging device further includes a main oil circuit flow debugging component 5 , and the main oil circuit flow debugging component 5 includes a main oil inlet base 51 and a main pressure cover 52 .

[0146] The main oil inlet base 51 is a cylindrical structure, with one end sealed to the first end of the first tubular housing and the other end sealed to the fourth end of the second tubular housing. A main oil inlet nozzle 511 is provided on the main oil inlet base 51 for connection to the oil supply system. A second external thread 515 is provided on the outer surface of the end of the main oil inlet base 51 near the fourth end. Optionally, an oil delivery pipe 512 is provided between the main oil inlet nozzle 511 and the main oil inlet base 51, connecting the two.

[0147] The main pressure cover 52 is a cylindrical structure. The inner side surface of one end of the main pressure cover 52 is provided with a second internal thread 523 that is compatible with the second external thread 515 on the main oil inlet base. The main pressure cover 52 is screwed to the main oil inlet base 51. The other end of the main pressure cover 52 extends radially inward to form a main end plate 521. The inner side surface of the main end plate 521 abuts against the main oil circuit cap cover 22 so that the main oil circuit cap cover 22 forms a sealed connection with the second tube shell. The main pressure cover 52 and the main oil circuit cap cover 22 are sealed.

[0148] According to some embodiments of the present disclosure, the first inner side surface 513 of the main oil inlet base 51 near the oil inlet nozzle 511 forms a cylindrical sealing surface with the auxiliary oil circuit adapter 11, and the two are sealed by the third sealing ring 53. The third sealing ring 53 is arranged in the first solder filling groove 111 on the auxiliary oil circuit adapter 11, and is deformed and sealed by the extrusion of the first inner side surface 513.

[0149] According to some embodiments of the present disclosure, the second inner side surface 514 of the main oil inlet base 51 at one end away from the oil inlet nozzle 511 forms a cylindrical sealing surface with the main oil circuit adapter 21, and the two are sealed by relying on the fourth sealing ring 54. The fourth sealing ring 54 is arranged on the second solder filling groove 211 on the main oil circuit adapter 21, and is deformed and sealed by the extrusion of the second inner side surface 514.

[0150] According to some embodiments of the present disclosure, the main oil inlet base 51 and the main gland 52 are threaded together to tightly press the main oil circuit cap 22 against the main oil circuit adapter 21, simultaneously deforming the fifth sealing ring 55 between the main oil circuit cap 22 and the main oil circuit adapter 21 to form a seal. The inner surface 522 of the main gland is used to limit radial deformation of the fifth sealing ring 55 and prevent it from rupturing or slipping.

[0151] In this embodiment, due to the presence of three sealing surfaces, the fuel enters the main oil circuit flow debugging assembly from the main oil inlet nozzle 511, then enters the cavity formed between the outer wall of the auxiliary oil circuit adapter 11 and the main oil inlet base 51, and passes through the main oil circuit adapter 21, the semi-lunar notch 113 and the second swirl groove 131 on the outside of the auxiliary oil circuit cap 13, and is finally ejected from the trumpet-shaped main nozzle 221 on the main oil circuit cap 22.

[0152] According to some embodiments of the present disclosure, the debugging device further includes a gaseous fuel line flow debugging component 6 , and the gaseous fuel line flow debugging component 6 includes an annular tube 61 and a center plug 62 .

[0153] One end of the ring tube 61 is provided with an air inlet nozzle 63, and the other end of the ring tube 61 is sealedly connected to the outer air cover 32.

[0154] The outer wall of the center plug 62 is sealed with the inner wall of the inner gas cover 31. The end of the center plug 62 away from the gaseous fuel nozzle 322 extends radially outward to form a support plate 64. The support plate 64 is sealed with the inner wall of the annular tube 61. The outer wall of the center plug 62, the annular tube 61, the support plate 64 and the outer gas cover 32 jointly define an annular fuel flow channel 602. The support plate 64 and the air inlet nozzle 63 form a fuel chamber 601 in the annular tube 61. The support plate 64 is provided with a flow hole 65 connecting the fuel chamber 601 and the fuel flow channel 602.

[0155] According to some embodiments of the present disclosure, a sixth sealing ring 66 and a seventh sealing ring 67 are respectively provided in the side wall grooves of the ring tube 61 and the center plug 62. The ring tube 61 forms a cylindrical sealing surface with the outer wall of the outer air cover 32, and is sealed by the sixth sealing ring 66; the center plug 62 forms a cylindrical sealing surface with the inner wall of the inner air cover 31, and is sealed by the seventh sealing ring 67.

[0156] According to some embodiments of the present disclosure, a fixing screw 68 is installed in the threaded hole of the ring tube 61 to press the outer air cover 32 and fix its axial position; the rubber pad 69 is used to protect the outer wall of the outer air cover 32 to prevent metal indentations.

[0157] In this embodiment, air is used instead of gaseous fuel during gas flow adjustment. Due to the presence of two cylindrical sealing surfaces, air enters the fuel chamber 601 from the air inlet nozzle 63, flows through the flow hole 65 into the fuel flow channel 602, and is ultimately ejected from the gaseous fuel nozzle 322.

[0158] According to another embodiment of the present disclosure, a method for debugging the flow of a dual-fuel nozzle is also provided, which is applicable to the dual-fuel nozzle as described above. The debugging method includes flow debugging of the secondary oil circuit, flow debugging of the main oil circuit and flow debugging of the gas circuit.

[0159] Flow debugging of auxiliary oil circuit, including:

[0160] S101: Connect the auxiliary oil circuit flow debugging component to the auxiliary oil circuit of the dual-fuel nozzle;

[0161] S102: Connect the auxiliary oil inlet nozzle of the auxiliary oil inlet base to the oil supply system and start the oil supply system;

[0162] S103: Adjust the oil supply pressure so that the oil pressure at the auxiliary oil inlet nozzle reaches the preset value and record the fuel flow rate;

[0163] S104: If the fuel flow rate is within the qualified range, the debugging is qualified; if the fuel flow rate is less than the minimum value of the qualified range, the first swirl groove and the slot are ground, and operations S101 to S104 are performed again; if the fuel flow rate is greater than the maximum value of the qualified range, the machine is scrapped.

[0164] Flow debugging of the main oil circuit, including:

[0165] S201: Connect the main oil circuit flow debugging component to the main oil circuit of the dual-fuel nozzle;

[0166] S202: Connect the main oil inlet nozzle of the main oil inlet base to the oil supply system and start the oil supply system;

[0167] S203: Adjust the fuel supply pressure so that the fuel pressure at the main fuel inlet nozzle reaches a preset value and record the fuel flow rate;

[0168] S204: If the fuel flow rate is within the qualified range, the debugging is qualified; if the fuel flow rate is less than the minimum value of the qualified range, the second swirl groove is ground and operations S101 to S104 are performed again; if the fuel flow rate is greater than the maximum value of the qualified range, it is scrapped.

[0169] Gas flow debugging, including:

[0170] S301: Connecting the gaseous fuel path flow rate debugging component to the gaseous fuel path of the dual-fuel nozzle;

[0171] S302, connecting the air inlet nozzle to the air supply system and turning on the air supply system;

[0172] S303: Adjust the air supply pressure so that the air pressure at the air inlet nozzle reaches a preset value and record the air flow rate;

[0173] S304: If the air flow rate is within the qualified range, the debugging is qualified; if the air flow rate is less than the minimum value of the qualified range, the gaseous fuel nozzle is ground and operations S301 to S304 are performed again; if the air flow rate is greater than the maximum value of the qualified range, it is scrapped.

[0174] The dual-fuel nozzle according to the embodiment of the present disclosure can be installed and debugged quickly and conveniently, thereby improving the accuracy and work efficiency of debugging the flow rates of the main and auxiliary oil circuits.

[0175] The embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It should be noted that any implementations not depicted or described in the drawings or the main text of the specification are known to those skilled in the art and are not described in detail. Furthermore, the definitions of the various components described above are not limited to the specific structures, shapes, or methods described in the embodiments; those skilled in the art may easily modify or replace them.

[0176] It should also be noted that, in the specific embodiments of the present disclosure, unless otherwise indicated, the numerical parameters in this specification and the appended claims are approximate values ​​and can vary depending on the desired properties obtained through the content of the present disclosure. Specifically, all numbers used in the specification and claims to express the size, range conditions, etc. of the composition should be understood to be modified by the term "about" in all cases. Generally, the meaning of the expression is to include a variation of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments of the specific quantity.

[0177] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways, even if such combinations and / or couplings are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or couplings are intended to fall within the scope of this disclosure.

[0178] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above are only specific embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A dual fuel nozzle debugging device, characterized in that: include: Dual fuel nozzles, including: Auxiliary oil circuit, including: The auxiliary oil circuit adapter comprises a first tube shell, wherein a first end of the first tube shell is suitable for connecting to the auxiliary oil guide pipe; A swirl core, the third end of which is connected to the second end of the first tube shell, the side of the swirl core close to the third end is provided with a groove, and the outer side of the swirl core is provided with a first swirl groove; A secondary oil circuit cap is provided on the swirl core, wherein the inner side wall of the secondary oil circuit cap and the outer side wall of the swirl core enclose a first swirl chamber, the secondary oil circuit cap is provided with a secondary nozzle, and the outer side surface of the secondary oil circuit cap is provided with a second swirl groove; Main oil circuit, including: A main oil circuit adapter includes a second tube shell, the second tube shell is sleeved on a portion of the first tube shell near the first end, and the fourth end of the second tube shell is suitable for connecting to the main oil pipe; A main oil circuit cap, one end of which is connected to the fifth end of the second tube shell and the other end of which is provided with a main nozzle, wherein the inner side surface of the main oil circuit cap and the outer side surface of the auxiliary oil circuit cap form a second swirl chamber; Gaseous fuel circuit, including: an outer gas hood, which is mounted on the main oil circuit cap, wherein the sixth end of the outer gas hood is adapted to be connected to a gas pipeline, the inner sidewall of the outer gas hood and the outer sidewall of the main oil circuit cap forming a gaseous fuel channel, and the seventh end of the outer gas hood is provided with a gaseous fuel nozzle; Auxiliary oil flow debugging components, including: The auxiliary oil inlet base is a cylindrical structure, one end of which is sealingly sleeved on the first end of the first tube shell, and the other end of which is provided with an auxiliary oil inlet nozzle for connecting to the oil supply system, and the side surface of the auxiliary oil inlet base away from the auxiliary oil inlet nozzle is provided with an external thread; a restriction ring, sleeved on the circular boss of the first tube shell, wherein a sealing ring is provided in a space defined by the restriction ring, the auxiliary oil circuit cap, and the first tube shell; The auxiliary pressure cover is a cylindrical structure. The inner side surface of one end of the auxiliary pressure cover is provided with an internal thread that is compatible with the external thread on the auxiliary oil inlet base. The auxiliary pressure cover is threadedly connected to the auxiliary oil inlet base. The other end of the auxiliary pressure cover extends radially inward to form a secondary end plate. The inner side surface of the secondary end plate abuts against the front end of the auxiliary oil circuit cap to press the auxiliary oil circuit cap against the sealing ring to form a sealed connection with the first tube shell.

2. The debugging device according to claim 1, characterized in that: The gaseous fuel path also includes: An inner air cover is mounted on the main oil circuit cap, with a plurality of partition blocks spaced apart on the outer side of the inner air cover. The partition blocks are provided with a purge air passage. The inner side of the inner air cover and the outer side of the main oil circuit cap form an annular passage for the purge air and an annular nozzle is formed at the front end to assist in atomizing the fuel in the main oil circuit and removing carbon deposits. The inner side wall of the outer air hood abuts against the upper surface of the partition block, and the outer side surface of the outer air hood is provided with a purge air inlet adapted to the purge air channel at intervals, and the inner side wall of the outer air hood and the outer side wall of the inner air hood enclose the gaseous fuel channel.

3. The debugging device according to claim 1, wherein: The main nozzle is in a trumpet-shaped shape.

4. The debugging device according to claim 1, wherein: The first tube shell is provided with a first solder filling groove for brazing connection with the nozzle housing, and the second tube shell is provided with a second solder filling groove for brazing connection with the nozzle housing.

5. The debugging device according to claim 1, characterized in that: A circular boss is provided on the first tube shell, and the side surface of the circular boss is sealedly connected to the end surface of the root of the auxiliary oil circuit cap to seal the auxiliary oil circuit channel.

6. The debugging device according to claim 1, characterized in that: A positioning plate is provided on the first tube shell, and the positioning plate is suitable for limiting the axial position of the auxiliary oil circuit adapter, wherein a notch is provided on the positioning plate for allowing the main oil circuit fuel to pass through.

7. The debugging device according to claim 1, characterized in that: It also includes a main oil circuit flow debugging component, which includes: a main oil inlet base having a cylindrical structure, one end of which is sealedly connected to the first end of the first tube shell, and the other end of which is sealedly connected to the fourth end of the second tube shell; a main oil inlet nozzle is provided on the main oil inlet base, and the main oil inlet nozzle is used to connect to the oil supply system; an external thread is provided on the outer surface of the end of the main oil inlet base near the fourth end; and The main pressure cover is a cylindrical structure. The inner side surface of one end of the main pressure cover is provided with an internal thread that is compatible with the external thread on the main oil inlet base. The main pressure cover is threadedly connected to the main oil inlet base. The other end of the main pressure cover extends radially inward to form a main end plate. The inner side surface of the main end plate abuts against the main oil circuit cap so that the main oil circuit cap forms a sealed connection with the second tube shell. The main pressure cover and the main oil circuit cap are sealed.

8. The debugging device according to claim 1, wherein: The gaseous fuel line flow rate debugging component is also included, and the gaseous fuel line flow rate debugging component includes: The ring tube has an air inlet nozzle at one end and the other end of the ring tube is sealed and connected to the outer air cover. A central plug, the outer wall of which is sealedly connected to the inner wall of the inner air cover, the end away from the gaseous fuel nozzle extends radially outward to form a support plate, the support plate is sealed to the inner wall of the annular tube, the outer wall of the central plug, the annular tube, the support plate and the outer air cover jointly define an annular fuel flow channel, the support plate and the air inlet nozzle form a fuel chamber in the annular tube, and the support plate is provided with a flow hole connecting the fuel chamber and the fuel flow channel.

9. A method for debugging the flow rate of a dual-fuel nozzle, characterized in that: Based on the debugging device of the dual-fuel nozzle according to any one of claims 1 to 8, the debugging method includes: Flow debugging of auxiliary oil circuit, including: S101: Connect the auxiliary oil circuit flow debugging component to the auxiliary oil circuit of the dual-fuel nozzle; S102: Connect the auxiliary oil inlet nozzle of the auxiliary oil inlet base to the oil supply system and start the oil supply system; S103: Adjust the oil supply pressure so that the oil pressure at the auxiliary oil inlet nozzle reaches the preset value and record the fuel flow rate; S104: If the fuel flow rate is within the qualified range, the debugging is qualified; if the fuel flow rate is less than the minimum value of the qualified range, the first swirl groove and the slot are ground, and operations S101 to S104 are repeated; if the fuel flow rate is greater than the maximum value of the qualified range, the machine is scrapped; Flow debugging of the main oil circuit, including: S201: Connect the main oil circuit flow debugging component to the main oil circuit of the dual-fuel nozzle; S202: Connect the main oil inlet nozzle of the main oil inlet base to the oil supply system and start the oil supply system; S203: Adjust the fuel supply pressure so that the fuel pressure at the main fuel inlet nozzle reaches a preset value and record the fuel flow rate; S204: If the fuel flow rate is within the qualified range, the debugging is qualified; if the fuel flow rate is less than the minimum value of the qualified range, the second swirl groove is ground and operations S101 to S104 are performed again; if the fuel flow rate is greater than the maximum value of the qualified range, the machine is scrapped; and Gas flow debugging, including: S301: Connecting the gaseous fuel path flow rate debugging component to the gaseous fuel path of the dual-fuel nozzle; S302, connecting the air inlet nozzle to the air supply system and turning on the air supply system; S303: Adjust the air supply pressure so that the air pressure at the air inlet nozzle reaches a preset value and record the air flow rate; S304: If the air flow rate is within the qualified range, the debugging is qualified; if the air flow rate is less than the minimum value of the qualified range, the gaseous fuel nozzle is ground and operations S301 to S304 are performed again; if the air flow rate is greater than the maximum value of the qualified range, it is scrapped.

Images