Flow adjusting device, dual-fuel nozzle and flow adjusting method

Abstract

The invention discloses a flow adjusting device, a dual-fuel nozzle and a flow adjusting method, the flow adjusting device comprises a body provided with a first flow channel and a mounting cavity, the first flow channel is provided with a first oil inlet and an oil outlet, the first oil inlet is used for communicating with a liquid fuel channel, and the oil outlet communicates with the mounting cavity; the valve body is arranged at the oil outlet; the movable sealing plug is arranged in the mounting cavity; the elastic assembly is arranged in the mounting cavity, one end of the elastic assembly abuts against the valve body in the flowing direction of the fuel, and the other end of the elastic assembly abuts against the movable sealing plug in the flowing direction of the fuel; and the position of the movable sealing plug in the mounting cavity is adjustable in the flowing direction of the fuel, so that the supporting force of the elastic assembly on the valve body is adjustable. According to the nozzle, the flow adjusting device is arranged, the effect of adjusting the flow can be achieved by adjusting the position of the movable sealing plug, the nozzle does not need to be repeatedly polished and repaired when the flow is adjusted, and scrapping caused when the nozzle is polished and repaired is avoided.

Description

Technical Field

[0001] The present application relates to the field of gas turbines, and in particular to a flow regulating device, a dual-fuel nozzle and a flow regulating method. Background Art

[0002] With the continuous development of gas turbine technology, dual-fuel nozzles are becoming more and more commonly used. The dual-fuel nozzle structure includes a gas fuel channel, a liquid fuel channel, and a nozzle. At present, most dual-fuel nozzles are processed by precision machining, first fine-machining each part, and then welding and assembling.

[0003] However, in order to ensure the flow characteristics of the nozzle, flow pre-debugging is required before welding. If it is unqualified, the nozzle or swirl groove of the nozzle needs to be polished or selected until it is qualified. This method of welding and assembly after debugging not only requires a large workload, but also the flow characteristics of the nozzle may deviate due to welding deformation and flow channel loss after welding. However, the nozzle cannot be disassembled at this time, and the nozzle can only be polished again. Repeated polishing and repairing can easily cause the nozzle to lose its precise flow characteristics. Moreover, when the shapes, sizes and precisions of the nozzles on the nozzles are inconsistent, the injection angle and uniformity of the fuel will also be inconsistent, which will also lead to problems such as reduced combustion efficiency and increased pollutant emissions. In addition, during the polishing process, it is easy to polish the nozzle too large or damage the parts, resulting in a high risk of scrapping. Summary of the invention

[0004] The present application proposes a flow regulating device, a dual-fuel nozzle and a flow regulating method, aiming to solve the problem that when the current dual-fuel nozzle adjusts the nozzle flow by first debugging and then welding and assembling, it is easy to cause the nozzle to lose its flow characteristics and have a high risk of scrapping.

[0005] In an embodiment of the present application, a flow regulating device is provided, the flow regulating device is used to be installed in a liquid fuel channel of a dual-fuel nozzle, and the flow regulating device includes:

[0006] A body, wherein a first flow channel and a mounting cavity are provided in the body, wherein the first flow channel is provided with a first oil inlet and an oil outlet, wherein the first oil inlet is used to communicate with the liquid fuel channel, and the oil outlet is communicated with the mounting cavity;

[0007] a valve body, the valve body being arranged at the oil outlet;

[0008] A movable sealing plug, the movable sealing plug being arranged in the installation cavity;

[0009] An elastic component, wherein the elastic component is arranged in the installation cavity, and along the flow direction of the fuel, one end of the elastic component abuts against the valve body, and the other end abuts against the movable sealing plug;

[0010] Along the flow direction of the fuel, the position of the movable sealing plug in the installation cavity is adjustable, so that the supporting force of the elastic component on the valve body can be adjusted.

[0011] In the embodiment of the present application, the movable sealing plug is provided with an external thread, the inner side wall of the installation cavity is provided with an internal thread adapted to the external thread, and the movable sealing plug is threadedly connected to the installation cavity;

[0012] Along the fuel flow direction, at least one second flow channel is provided on the movable sealing plug.

[0013] In the embodiment of the present application, an operating groove is provided at one end of the movable sealing plug away from the elastic component.

[0014] In the embodiment of the present application, a first mounting hole is provided at one end of the movable sealing plug close to the elastic component, and one end of the elastic component close to the movable sealing plug is provided in the first mounting hole.

[0015] In an embodiment of the present application, the valve body is a ball valve, the flow regulating device also includes a ball seat, the ball valve is arranged at the oil outlet, the ball seat is arranged between the ball valve and the elastic component, one end of the ball seat supports the ball valve, and the other end abuts against the elastic component.

[0016] In the embodiment of the present application, the end of the ball seat close to the ball valve is provided with a concave arc surface, and the ball valve is arranged in the arc surface;

[0017] One end of the ball seat close to the elastic component is provided with a second mounting hole, and one end of the elastic component close to the ball seat is arranged in the second mounting hole.

[0018] In an embodiment of the present application, the diameter of the ball seat is the same as the inner diameter of the installation cavity, and the ball seat is sleeved on the inner wall of the installation cavity so that the ball seat can slide along the inner wall of the installation cavity.

[0019] In the embodiment of the present application, at least one third flow channel is provided on the ball seat along the fuel flow direction.

[0020] In the embodiment of the present application, the valve body is a conical valve, the end of the conical valve close to the oil outlet is a conical end, the conical end is arranged at the oil outlet, and the end of the conical valve away from the oil outlet abuts against the elastic component.

[0021] In the embodiment of the present application, a sealing seat is provided at one end of the conical valve away from the oil outlet, the sealing seat is slidably arranged on the inner wall of the mounting cavity, and the elastic component abuts against the sealing seat;

[0022] A fourth flow channel is provided inside the conical valve, a flow channel outlet connected to the fourth flow channel is provided at one end of the sealing seat facing the elastic component, and a flow channel inlet connected to the fourth flow channel is provided on the side wall of the conical valve located between the sealing seat and the oil outlet.

[0023] In the embodiment of the present application, the oil outlet is provided with an adapting surface, and the adapting surface is adapted to the valve body.

[0024] In the embodiment of the present application, an oil filter is provided in the first flow channel.

[0025] In the embodiment of the present application, a sealing groove is provided on the outer side wall of the body, and the sealing groove is used to install a sealing ring so that the body is sealed and installed in the liquid fuel channel.

[0026] In an embodiment of the present application, the outer side wall of the body is provided with a groove section, and along the axial direction of the body, the groove section is located between the sealing groove and the first oil inlet, and the bottom wall of the groove section is provided with at least one second oil inlet, and the second oil inlet is connected to the first flow channel.

[0027] In an embodiment of the present application, an annular protrusion is provided at one end of the body close to the oil inlet, and the annular protrusion is used to fit with an annular groove in the liquid fuel channel.

[0028] The present application also proposes a dual-fuel nozzle, comprising:

[0029] a shell, wherein a liquid fuel passage and a gas fuel passage are provided in the shell;

[0030] The liquid fuel passage is provided with a flow regulating device as described in any one of the above items, and the outlet of the liquid fuel passage is provided with a swirler and a liquid fuel nozzle in sequence;

[0031] An orifice plate is arranged in the gas fuel channel, and the orifice plate is used to adjust the flow rate of the gas fuel. A gas fuel nozzle is arranged at the outlet of the gas fuel channel.

[0032] In the embodiment of the present application, the liquid fuel channel is further provided with a liquid fuel channel clamp ring on the outside of the flow regulating device;

[0033] The gas fuel channel is further provided with a gas fuel channel clamp ring on the outer side of the orifice plate.

[0034] The present application also proposes a liquid flow rate regulation method, which is applied to any of the above-mentioned dual-fuel nozzles, and the method comprises:

[0035] determining an effective area of ​​the liquid fuel nozzle and a measured flow rate of the liquid fuel at the liquid fuel nozzle;

[0036] determining an actual pressure difference between an actual pressure of the liquid fuel after flowing out of the valve body and an actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle based on a measured flow rate of the liquid fuel at the liquid fuel nozzle and an effective area of ​​the liquid fuel nozzle;

[0037] determining an actual pressure of the liquid fuel after flowing out of the valve body based on the actual pressure difference and the actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle;

[0038] The position of the movable sealing plug is adjusted based on the actual pressure of the liquid fuel after flowing out of the valve body and the theoretical pressure of the liquid fuel after flowing out of the valve body.

[0039] In the embodiment of the present application, adjusting the position of the movable sealing plug based on the actual pressure of the liquid fuel after flowing out of the valve body and the theoretical pressure of the liquid fuel after flowing out of the valve body includes:

[0040] If the actual pressure of the liquid fuel after flowing out of the valve body is greater than the theoretical pressure of the liquid fuel after flowing out of the valve body, adjusting the movable sealing plug to be close to the valve body;

[0041] If the actual pressure of the liquid fuel after flowing out of the valve body is less than the theoretical pressure of the liquid fuel after flowing out of the valve body, adjusting the movable sealing plug away from the valve body;

[0042] If the actual pressure of the liquid fuel after flowing out of the valve body is equal to the theoretical pressure of the liquid fuel after flowing out of the valve body, there is no need to adjust the position of the movable sealing plug.

[0043] In the embodiment of the present application, the adjustment distance of the movable sealing plug is determined by the following formula:

[0044] △X=(P2–P3)*S / K;

[0045] Among them, △X represents the compression amount that the elastic component needs to adjust, K represents the stiffness of the elastic component, S represents the area on which the liquid fuel pressure acts on the valve body, P2 is the actual pressure of the liquid fuel after flowing out of the valve body, and P3 is the theoretical pressure of the liquid fuel after flowing out of the valve body.

[0046] The present application also proposes a gas flow rate regulation method, which is applied to any of the above-mentioned dual-fuel nozzles, and the method comprises:

[0047] determining an effective area of ​​the gas fuel nozzle and a measured flow rate of the gas fuel at the gas fuel nozzle;

[0048] determining an actual pressure difference between an actual pressure of the gas fuel after flowing out of the orifice plate and an actual pressure after flowing out of the gas fuel nozzle based on a measured flow rate of the gas fuel at the gas fuel nozzle and an effective area of ​​the gas fuel nozzle;

[0049] determining the actual pressure of the gas fuel after flowing out of the orifice plate based on the actual pressure difference and the actual pressure of the gas fuel after flowing out of the gas fuel nozzle;

[0050] Based on the actual pressure of the gas fuel after flowing out of the orifice plate and the theoretical pressure of the gas fuel after flowing out of the orifice plate, the effective area of ​​the throttling hole on the orifice plate is adjusted.

[0051] In an embodiment of the present application, adjusting the effective area of ​​the throttle hole on the orifice plate based on the actual pressure of the gas fuel after flowing out of the orifice plate and the theoretical pressure of the gas fuel after flowing out of the orifice plate includes:

[0052] If the actual pressure of the gas fuel after flowing out of the orifice plate is greater than the theoretical pressure of the gas fuel after flowing out of the orifice plate, reducing the effective area of ​​the throttling hole on the orifice plate;

[0053] If the actual pressure of the gas fuel after flowing out of the orifice plate is less than the theoretical pressure of the gas fuel after flowing out of the orifice plate, increasing the effective area of ​​the throttling hole on the orifice plate;

[0054] If the actual pressure of the gas fuel after flowing out of the orifice plate is equal to the theoretical pressure of the gas fuel after flowing out of the orifice plate, the effective area of ​​the throttling hole on the orifice plate is kept unchanged.

[0055] The present application sets a flow regulating device. When in use, the flow regulating device is arranged in the liquid fuel channel. By adjusting the position of the movable sealing plug in the installation cavity, the flow rate of the liquid fuel at the oil outlet position of the first flow channel can be adjusted. The liquid fuel flows through the oil outlet and flows out of the installation cavity, and is finally sprayed out at the liquid fuel nozzle. If the flow rate at the oil outlet is large, the flow rate at the liquid fuel nozzle is large, and if the flow rate at the oil outlet is small, the flow rate at the liquid fuel nozzle is small. That is, the flow characteristics of the liquid fuel at the liquid fuel nozzle can also be adjusted based on the movable sealing plug. Therefore, when adjusting the flow characteristics at the liquid fuel nozzle, it can be adjusted based on the flow regulating device without repeatedly repairing the liquid fuel nozzle. It is not only convenient to adjust, but also can avoid the scrapping caused by repairing the liquid fuel nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0057] Figure 1 It is a structural schematic diagram of a flow regulating device in one embodiment of the present application;

[0058] Figure 2 It is a schematic diagram of the structure of the main body in one embodiment of the present application;

[0059] Figure 3 This is a schematic diagram of the structure of a movable sealing plug in one embodiment of the present application;

[0060] Figure 4 It is a schematic diagram of the structure of a ball seat in one embodiment of the present application;

[0061] Figure 5 This is a schematic diagram of adjusting the movable sealing plug downward in one embodiment of the present application;

[0062] Figure 6 This is a schematic diagram of adjusting the movable sealing plug upward in one embodiment of the present application;

[0063] Figure 7 is a schematic structural diagram of a dual-fuel nozzle in an embodiment of the present application;

[0064] Figure 8 It is a structural schematic diagram of a flow regulating device in another embodiment of the present application;

[0065] Fig. 9 is a step diagram of a liquid fuel flow rate regulation method in an embodiment of the present application;

[0066] Fig.10 1 is a step diagram of a gas fuel flow rate regulation method in an embodiment of the present application.

[0067] Reference numerals:

[0068] 1: Flow regulating device;

[0069] 2: Oil filter;

[0070] 3: body, 3-1: first flow channel, 3-2: second oil inlet, 3-3: sealing groove, 3-4: internal thread, 3-5: first oil inlet, 3-6: oil outlet, 3-7: matching surface, 3-8: mounting cavity, 3-9: groove section, 3-10: annular protrusion;

[0071] 4: ball valve;

[0072] 5: ball seat, 5-1: third flow channel, 5-2: second mounting hole, 5-3: arc surface;

[0073] 6: Elastic component;

[0074] 7: movable sealing plug, 7-1: second flow channel, 7-2: first mounting hole, 7-3: external thread, 7-4: operating groove;

[0075] 8: Gas fuel channel clamp ring;

[0076] 9: orifice plate, 9-1: throttle hole;

[0077] 10: housing, 10-1: mounting seat, 10-2: gas fuel channel, 10-3: liquid fuel channel;

[0078] 11: Liquid fuel channel collar;

[0079] 12: sealing ring;

[0080] 13: cyclone;

[0081] 14: Liquid fuel nozzle;

[0082] 15: gas fuel nozzle;

[0083] 16: conical valve, 16-1: conical end, 16-2: sealing seat, 16-3: fourth flow channel, 16-4: flow channel inlet, 16-5: flow channel outlet.

[0084] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0085] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0086] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0087] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0088] like Figure 1 , Figure 2 , Figure 7 As shown, the embodiment of the present application provides a flow regulating device 1, which is used to be installed in a liquid fuel channel 10-3 of a dual-fuel nozzle. The flow regulating device 1 includes:

[0089] A body 3, wherein a first flow channel 3-1 and a mounting cavity 3-8 are provided in the body 3, wherein the first flow channel 3-1 is provided with a first oil inlet 3-5 and an oil outlet 3-6, wherein the first oil inlet 3-5 is used to communicate with the liquid fuel channel 10-3, and the oil outlet 3-6 is communicated with the mounting cavity 3-8;

[0090] A valve body, the valve body being arranged at the oil outlet 3-6;

[0091] A movable sealing plug 7, wherein the movable sealing plug 7 is arranged in the installation cavity 3-8;

[0092] An elastic component 6, wherein the elastic component 6 is disposed in the installation cavity 3-8, and along the flow direction of the fuel, one end of the elastic component 6 abuts against the valve body, and the other end abuts against the movable sealing plug 7;

[0093] Along the flow direction of the fuel, the position of the movable sealing plug 7 in the installation cavity 3-8 is adjustable, so that the supporting force of the elastic component 6 on the valve body can be adjusted.

[0094] Reference Figure 1 , Figure 2 , Figure 7As shown, in the embodiment of the present application, the flow regulating device 1 is installed in the liquid fuel channel 10-3, and is used to regulate the flow of the liquid fuel. The flow regulating device 1 includes a body 3, which is roughly cylindrical in shape, and the outer diameter of the body 3 is roughly the same as the inner diameter of the liquid fuel channel 10-3. The body 3 is installed in the liquid fuel channel 10-3, and a first flow channel 3-1 and a mounting cavity 3-8 are provided inside the body 3. The first flow channel 3-1 is provided with a first oil inlet 3-5 and an oil outlet 3-6, and the oil outlet 3-6 is connected to the mounting cavity 3-8. After the body 3 is installed in the liquid fuel channel 10-3, the liquid fuel in the liquid fuel channel 10-3 enters the first flow channel 3-1 from the first oil inlet 3-5, and then flows out from the oil outlet 3-6 and enters the mounting cavity 3-8. After flowing out from the mounting cavity 3-8, it flows to the liquid fuel nozzle 14 of the liquid fuel channel 10-3.

[0095] In the embodiment of the present application, the valve body may be of various types, such as Figure 1 The ball valve 4 shown, or Figure 8 The conical valve 16 shown in the figure, etc., the present application does not limit the specific type of the valve body. Among them, the valve body is arranged at the oil outlet 3-6, one end of the valve body close to the oil outlet 3-6 is used to seal the oil outlet 3-6, and the other end is mutually abutted with the elastic component 6, the elastic component 6 applies a supporting force to the valve body toward the oil outlet 3-6, and the liquid fuel in the first flow channel 3-1 applies pressure to the valve body toward the elastic component 6. When the pressure applied by the liquid fuel in the first flow channel 3-1 to the valve body is greater than the supporting force applied by the elastic component 6 to the valve body, the valve body opens the oil outlet 3-6, and the liquid fuel flows out from the oil outlet 3-6.

[0096] like Figure 1 , Figure 2 As shown, in the embodiment of the present application, the valve body is a ball valve 4 as an example, wherein the ball valve 4 is arranged at the oil outlet 3-6, and the outer surface of the ball valve 4 is a spherical surface and is arranged at the oil outlet 3-6. When the outer surface of the ball valve 4 closes the oil outlet 3-6, the liquid fuel located in the first flow channel 3-1 cannot flow out from the oil outlet 3-6. When the ball valve 4 is away from the oil outlet 3-6, the oil outlet 3-6 is opened, and the liquid fuel can flow out from the oil outlet 3-6. Moreover, as the ball valve 4 gradually moves away from the oil outlet 3-6, the space opened by the oil outlet 3-6 gradually increases, and the flow rate of the liquid fuel flowing out of the oil outlet 3-6 gradually increases.

[0097] Continue to refer to Figure 1 , Figure 2 , Figure 7 ,exist Figure 1 , Figure 2In the orientation shown, the liquid fuel flows from top to bottom, the first flow channel 3-1 is located at the top, the installation cavity 3-8 is located at the bottom, the elastic component 6 is arranged below the ball valve 4, and a movable sealing plug 7 is arranged below the elastic component 6. The movable sealing plug 7 presses the elastic component 6 upward, so that the elastic component 6 can provide an upward supporting force to the ball valve 4, and the supporting force supports the ball valve 4 to close the oil outlet 3-6. Figure 1 When the position shown is set in the liquid fuel channel 10-3, after the liquid fuel enters the first flow channel 3-1, the liquid fuel applies downward pressure to the ball valve 4, and the elastic component 6 applies upward pressure to the ball valve 4. The pressure applied by the liquid fuel on the ball valve 4 is greater than the pressure applied by the elastic component 6 on the ball valve 4. Therefore, the upper and lower pressure difference can cause the elastic component 6 to be compressed downward. When the elastic component 6 is compressed downward, the ball valve 4 moves downward to open the oil outlet 3-6, and the liquid fuel flows out from the oil outlet 3-6. The greater the pressure difference between the pressure exerted downward on the ball valve 4 by the liquid fuel in the first flow channel 3-1 and the pressure exerted upward on the ball valve 4 by the elastic component 6, the farther the ball valve 4 moves downward under the pressure of the liquid fuel in the first flow channel 3-1, the larger the space released at the oil outlet 3-6, and the larger the flow rate; the smaller the pressure difference between the pressure exerted downward on the ball valve 4 by the liquid fuel in the first flow channel 3-1 and the pressure exerted upward on the ball valve 4 by the elastic component 6, the smaller the distance the ball valve 4 moves downward under the pressure of the liquid fuel in the first flow channel 3-1, the smaller the space released at the oil outlet 3-6, and the smaller the flow rate.

[0098] Under the premise that the oil supply power of the oil supply device to the liquid fuel channel 10-3 remains unchanged, the pressure of the liquid fuel in the first flow channel 3-1 is fixed, that is, the pressure exerted by the liquid fuel in the first flow channel 3-1 on the ball valve 4 is fixed. Figure 1In the shown position, the upper and lower positions of the movable sealing plug 7 in the installation cavity 3-8 are adjustable. The closer the movable sealing plug 7 is to the top, the greater the compression of the elastic component 6, the greater the pressure applied upward by the elastic component 6 to the ball valve 4, the smaller the pressure applied downward by the liquid fuel in the first flow channel 3-1 to the ball valve 4, and the pressure difference between the pressure applied upward by the elastic component 6 to the ball valve 4, the smaller the flow rate of the oil outlet 3-6; the closer the movable sealing plug 7 is to the bottom, the smaller the compression of the elastic component 6, the smaller the pressure applied upward by the elastic component 6 to the ball valve 4, the greater the pressure applied downward by the liquid fuel in the first flow channel 3-1 to the ball valve 4, and the pressure difference between the pressure applied upward by the elastic component 6 to the ball valve 4, the greater the flow rate of the oil outlet 3-6. Therefore, the elastic force of the elastic component 6 can be changed by adjusting the position of the movable sealing plug 7 in the installation cavity 3-8, thereby changing the pressure of the liquid fuel on the ball valve 4 and the pressure difference between the pressure of the elastic component 6 on the ball valve 4, thereby playing a role in adjusting the flow rate of the liquid fuel at the oil outlet 3-6.

[0099] like Figure 8 As shown, taking the valve body as a conical valve 16 as an example, in an embodiment of the present application, the valve body is a conical valve 16, the end of the conical valve 16 close to the oil outlet 3-6 is a conical end 16-1, the conical end 16-1 is arranged at the oil outlet 3-6, and the end of the conical valve 16 away from the oil outlet 3-6 is in contact with the elastic component 6.

[0100] like Figure 8 As shown, the conical valve 16 has a conical end 16-1, the outer surface of which is a conical surface. When installed, the conical end 16-1 extends into the first flow channel 3-1, and the conical surface of the conical end 16-1 is sealed with the oil outlet 3-6. Figure 8 In the shown orientation, the lower end of the conical valve 16 abuts against the elastic component 6, and the elastic component 6 applies a supporting force upward to the conical valve 16, so that the conical end 16-1 can seal the oil outlet 3-6, and the liquid fuel in the first flow channel 3-1 applies pressure downward to the conical end 16-1. When the pressure exerted downward on the conical valve 16 by the liquid fuel in the first flow channel 3-1 is greater than the pressure exerted upward on the conical valve 16 by the elastic component 6, the conical end 16-1 opens the oil outlet 3-6, and the supporting force exerted by the elastic component 6 on the conical valve 16 can also be adjusted by the movable sealing plug 7, that is, when the valve body is a conical valve 16, the elastic force of the elastic component 6 can also be changed by adjusting the position of the movable sealing plug 7 in the installation cavity 3-8, thereby changing the pressure of the liquid fuel on the conical valve 16, and the pressure difference between the pressure of the elastic component 6 on the conical valve 16, thereby playing a role in adjusting the flow rate of the liquid fuel at the oil outlet 3-6.

[0101] The embodiment of the present application is provided with a flow regulating device 1. When in use, the flow regulating device 1 is arranged in the liquid fuel channel 10-3, and the position of the movable sealing plug 7 in the installation cavity 3-8 in the liquid fuel flow direction is adjusted (i.e., the position of the movable sealing plug 7 in the liquid fuel flow direction is adjusted). Figure 1 , Figure 8 The upper and lower positions of the orientation shown in the figure can adjust the flow rate of the liquid fuel at the oil outlet 3-6 position of the first flow channel 3-1. After the liquid fuel flows through the oil outlet 3-6, it flows out from the installation cavity 3-8 and is finally sprayed out at the liquid fuel nozzle 14. If the flow rate at the oil outlet 3-6 is large, the flow rate at the liquid fuel nozzle 14 is large, and if the flow rate at the oil outlet 3-6 is small, the flow rate at the liquid fuel nozzle 14 is small. That is, the flow characteristics of the liquid fuel at the liquid fuel nozzle 14 can also be adjusted based on the movable sealing plug 7. Therefore, when adjusting the flow characteristics at the nozzle, it can be adjusted based on the flow regulating device 1 without repeatedly polishing the liquid fuel nozzle 14 of the nozzle. This not only facilitates adjustment, but also avoids scrapping caused by polishing the liquid fuel nozzle 14.

[0102] like Figure 1 , Figure 2 , Figure 3 As shown, in the embodiment of the present application, the movable sealing plug 7 can be a screw plug, a screw rod or other equipment, which is arranged in the installation cavity 3-8, and its position in the direction of the liquid fuel flowing in the installation cavity can be adjusted, such as Figure 1 The upper and lower positions of the orientation shown can be adjusted. For example, in the embodiment of the present application, the outer side of the movable sealing plug 7 is provided with an external thread 7-3, the inner side wall of the installation cavity 3-8 is provided with an internal thread 3-4 adapted to the external thread 7-3, and the movable sealing plug 7 is threadedly connected to the installation cavity 3-8; along the fuel flow direction, the movable sealing plug 7 is provided with at least one second flow channel 7-1.

[0103] Reference Figure 3 , Figure 7 In the embodiment of the present application, the movable sealing plug 7 can form a threaded connection with the internal thread 3-4 of the installation cavity 3-8 based on its own external thread 7-3, thereby playing a supporting role for the elastic component 6. In addition, since the movable sealing plug 7 is threadedly connected to the installation cavity 3-8, the position of the movable sealing plug 7 in the installation cavity 3-8 can be adjusted by twisting the movable sealing plug 7, thereby facilitating the adjustment of the size of the supporting force of the elastic component 6 on the valve body. In addition, after the movable sealing plug 7 is threadedly connected to the installation cavity 3-8, a sealed connection is formed between the movable sealing plug 7 and the inner side wall of the installation cavity 3-8. Therefore, in the embodiment of the present application, at least one second flow channel 7-1 is also provided on the movable sealing plug 7, so that after the liquid fuel enters the installation cavity 3-8 from the oil outlet 3-6, it can flow out from at least one second flow channel 7-1 on the movable sealing plug 7, and then flow to the liquid fuel nozzle 14.

[0104] It should be noted that the embodiment of the present application does not limit the number of the second flow channels 7-1. In addition, when there are multiple second flow channels 7-1, the diameters of the multiple second flow channels 7-1 can be the same and can be evenly distributed along the circumference of the movable sealing plug 7, so that the liquid fuel can flow out evenly from each second flow channel 7-1 to ensure the stability of the fuel supply.

[0105] like Figure 3 As shown, in the embodiment of the present application, an operating groove 7-4 is provided at one end of the movable sealing plug 7 away from the elastic component 6. The operating groove 7-4 may be a "one" or "cross" shaped groove, or may be an inner hexagonal groove or an inner triangular groove, so that during adjustment, the position of the movable sealing plug 7 in the installation cavity 3-8 may be conveniently adjusted by using a screwdriver of a corresponding type.

[0106] like Figure 1 , Figure 3 As shown, in the embodiment of the present application, the end of the movable sealing plug 7 close to the elastic component 6 is provided with a first mounting hole 7-2, and the end of the elastic component 6 close to the movable sealing plug 7 is arranged in the first mounting hole 7-2. In the embodiment of the present application, the elastic component 6 can be a spring, and a first mounting hole 7-2 having a substantially same outer diameter as the spring is provided at the end of the movable sealing plug 7 close to the elastic component 6. During installation, the end of the spring close to the movable sealing plug 7 can be arranged in the first mounting hole 7-2. The first mounting hole 7-2 can limit the spring, so that when adjusting the position of the movable sealing plug 7, the spring can be prevented from moving radially, so that it can always maintain a vertical state, thereby providing a stable supporting force for the valve body.

[0107] One end of the elastic component 6 close to the valve body abuts against the valve body. Figure 1 , Figure 4 As shown, when the valve body is a ball valve 4, in order to enable the elastic component to stably abut against the ball valve 4, a ball seat 5 is also provided in the embodiment of the present application. The ball seat 5 is provided between the ball valve 4 and the elastic component 6. One end of the ball seat 5 supports the ball valve 4, and the other end abuts against the elastic component 6.

[0108] Among them, in the embodiment of the present application, the ball seat 5 is roughly cylindrical, and an end of the ball seat 5 close to the ball valve 4 is provided with a concave arc surface 5-3, and the arc surface 5-3 is roughly contoured to the outer surface of the ball valve 4, so that the ball valve 4 can be set in the arc surface 5-3 to support and fix the ball valve 4.

[0109] In addition, continue to refer to Figure 4In the embodiment of the present application, a second mounting hole 5-2 may be provided at one end of the ball seat 5 close to the elastic component 6, and the end of the elastic component 6 close to the ball seat 5 may be arranged in the second mounting hole 5-2. For example, in the embodiment of the present application, if the elastic component 6 is a spring, the end of the spring close to the ball seat 5 may be arranged in the second mounting hole 5-2, and the second mounting hole 5-2 may limit the spring, so that when the position of the movable sealing plug 7 is adjusted, the spring may be kept in a vertical state at all times, and the spring may be prevented from bending in its radial direction, so that the spring may exert a stable supporting force on the ball seat 5 and the ball valve 4.

[0110] Continue to refer to Figure 1 , Figure 4 In the embodiment of the present application, the diameter of the ball seat 5 is the same as the inner diameter of the installation cavity 3-8, and the ball seat 5 is sleeved on the inner wall of the installation cavity 3-8 so that the ball seat 5 can slide along the inner wall of the installation cavity 3-8. In the embodiment of the present application, when the position of the movable sealing plug 7 is adjusted, the elastic component 6 is further compressed, or the elastic force of the elastic component 6 is released. When the elastic component 6 is compressed, the supporting force of the elastic component 6 on the ball seat 5 increases. Figure 1 In the position shown, the ball seat 5 has a tendency to move upward, and the diameter of the ball seat 5 is substantially the same as or slightly smaller than the inner diameter of the mounting cavity 3-8, so the ball seat 5 can only slide along the inner wall of the mounting cavity 3-8 toward the oil outlet 3-6, and will not move radially toward the mounting cavity 3-8, thereby ensuring that the ball valve 4 is firmly fixed to the oil outlet 3-6. In addition, when the liquid fuel in the first flow channel 3-1 applies pressure to the ball valve 4 and opens the oil outlet 3-6, Figure 1 In the position shown, the ball seat 5 will move downward, and the diameter of the ball seat 5 is substantially the same as or slightly smaller than the inner diameter of the mounting cavity 3-8, so the ball seat 5 can only slide downward along the inner wall of the mounting cavity 3-8, and will not move radially in the mounting cavity 3-8, so that when the oil outlet 3-6 is discharging oil, the ball valve 4 can also be ensured to be firmly located at the oil outlet 3-6. When the oil supply is stopped, the liquid fuel pressure in the first flow channel 3-1 decreases, and the elastic component 6 supports the ball seat 5 to move toward the oil outlet 3-6 again, and the ball seat 5 can still only slide upward along the inner wall of the mounting cavity 3-8, so that the ball valve 4 can re-close the oil outlet 3-6. That is, a ball seat 5 is set, and the outer diameter of the ball seat 5 is set to be the same as or slightly smaller than the inner diameter of the installation cavity 3-8, and an arc surface 5-3 is set on the ball seat 5, and the ball valve 4 is set in the arc surface 5-3, so that no matter whether the ball valve 4 moves upward or downward, the ball valve 4 can be firmly fixed at the oil outlet 3-6 position.

[0111] Continue to refer to Figure 4In the embodiment of the present application, along the fuel flow direction, at least one third flow channel 5-1 is provided on the ball seat 5. Figure 1 As shown, the outer diameter of the ball seat 5 is approximately the same as or slightly smaller than the inner diameter of the mounting cavity 3-8, so a sealed state can be formed between the outer wall of the ball seat 5 and the inner wall of the mounting cavity 3-8, or there is only a small gap. At this time, the liquid fuel cannot pass through the ball seat 5 after flowing out from the oil outlet 3-6. Therefore, the embodiment of the present application also provides at least one third flow channel 5-1 on the ball seat 5, so that the liquid fuel can flow to the movable sealing plug 7 through each third flow channel 5-1.

[0112] like Figure 4 As shown, in the embodiment of the present application, the third flow channel 5-1 runs through the ball seat 5, and three third flow channels 5-1 are provided on the ball seat 5. The three third flow channels 5-1 are evenly arranged along the circumference of the ball seat 5, and the three third flow channels 5-1 are of the same size, so that the liquid fuel can flow evenly from the ball seat 5 to the movable sealing plug 7. In addition, it should be noted that the embodiment of the present application does not limit the number of the third flow channels 5-1. In other embodiments, more or fewer third flow channels 5-1 can be provided. In addition, the shape of the third flow channel 5-1 is not limited to Figure 4 As shown, in other embodiments, the third flow channel 5 - 1 may also be in other shapes.

[0113] After introducing how the ball valve 4 is connected to the elastic component 6 when the valve body is a ball valve 4, next, how the cone valve 16 is connected to the elastic component 6 when the valve body is a cone valve 16 is described.

[0114] like Figure 8 As shown, in the embodiment of the present application, a sealing seat 16-2 is provided at one end of the conical valve 16 away from the oil outlet 3-6, and the sealing seat 16-2 is slidably arranged on the inner wall of the mounting cavity 3-8, and the elastic component 6 abuts against the sealing seat 16-2;

[0115] A fourth flow channel 16-3 is provided inside the conical valve 16, and a flow channel outlet 16-5 connected to the fourth flow channel 16-3 is provided at one end of the sealing seat 16-2 facing the elastic component 6, and a flow channel inlet 16-4 connected to the fourth flow channel 16-3 is provided on the side wall of the conical valve 16 located between the sealing seat 16-2 and the oil outlet 3-6.

[0116] exist Figure 8In the orientation shown, the conical end 16-1 of the conical valve 16 is located at the upper end, and the sealing seat 16-2 is located at the lower end. The sealing seat 16-2 is roughly truncated cone-shaped. The diameter of the sealing seat 16-2 can be the same as the inner diameter of the mounting cavity 3-8, or can be slightly smaller than the inner diameter of the mounting cavity 3-8, so that the conical valve 16 can slide up and down along the inner wall of the mounting cavity 3-8 through the sealing seat 16-2. For example, when the oil outlet 3-6 is closed, the conical valve 16 slides upward along the inner wall of the mounting cavity 3-8 through the sealing seat 16-2; when the oil outlet 3-6 is opened, the conical valve 16 slides downward along the inner wall of the mounting cavity 3-8 through the sealing seat 16-2. Since the diameter of the sealing seat 16-2 is roughly the same as the inner diameter of the mounting cavity 3-8, whether sliding upward or downward, it can ensure that the conical valve 16 slides axially along the mounting cavity 3-8, and ensure that the oil outlet 3-6 can be stably opened or closed.

[0117] Continue to refer to Figure 8 ,exist Figure 8 In the position shown, the lower end of the sealing seat 16-2 is in contact with the elastic component 6. Taking the elastic component as a single spring as an example, the sealing seat 16-2 can be coaxially arranged with the spring so that the spring can evenly apply a supporting force to the sealing seat 16-2. In addition, a fixing groove ( Figure 8 (not shown) to improve the installation firmness between the spring and the sealing seat 16-2.

[0118] Continue to refer to Figure 8 ,exist Figure 8 In the orientation shown, the outer diameter of the portion of the conical valve 16 located above the sealing seat 16-2 is smaller than the outer diameter of the sealing seat 16-2, that is, at the position above the sealing seat 16-2, there is an accommodation space between the outer side wall of the conical valve 16 and the inner side wall of the installation cavity 3-8. When the conical valve 16 opens the oil outlet 3-6, the liquid fuel flows out from the oil outlet 3-6 and enters the accommodation space. In order to guide the liquid fuel out, a fourth flow channel 16-3 can be provided inside the conical valve 16, and the flow channel inlet 16-4 of the fourth flow channel 16-3 is provided on the side wall of the conical valve 16 located above the sealing seat 16-2, and the flow channel outlet 16-5 is provided on one end of the sealing seat 16-2 close to the elastic component 6. Thus, the liquid fuel flows out from the oil outlet 3-6, flows into the fourth flow channel 16-3 from the flow channel inlet 16-4, and flows out from the flow channel outlet 16-5, and then enters the second flow channel 7-1 on the sealing movable plug 7.

[0119] The above is a connection method between the valve body, the ball valve 4, the cone valve 16 and the elastic component 6. Next, the installation method between the valve body and the oil outlet 3-6 is explained.

[0120] like Figure 1 , Figure 8 As shown, in the embodiment of the present application, the oil outlet 3-6 is provided with an adapting surface 3-7, and the adapting surface 3-7 is adapted to the valve body.

[0121] Among them, Figure 1 As shown, taking the valve body as a ball valve 4 as an example, when the valve body is a ball valve 4, the outer surface of the ball valve 4 is a spherical surface, so the adapter surface 3-7 can be an arc surface, which is arranged on the inner wall of the first flow channel 3-1 at the position of the oil outlet 3-6, and the arc surface is connected to the inner wall of the first flow channel 3-1. The arc surface is roughly contoured to the spherical surface of the ball valve 4, and the ball valve 4 is at least partially arranged in the arc surface. The arc surface can stabilize the ball valve 4 and prevent the ball valve 4 from deviating from the oil outlet 3-6.

[0122] like Figure 8 As shown, taking the valve body as a conical valve 16 as an example, when the valve body is a conical valve 16, the outer surface of the conical end 16-1 of the conical valve 16 is a conical surface, therefore, the adapting surface 3-7 can be a conical surface, which is arranged on the inner wall of the first flow channel 3-1 at the position of the oil outlet 3-6, the conical surface is connected to the inner wall of the first flow channel 3-1, the conical surface is roughly contoured with the conical end 16-1 of the conical valve 16, the conical end 16-1 of the conical valve 16 is arranged inside the conical surface, the conical surface can stabilize the conical end 16-1 of the conical valve 16, and prevent the conical valve 16 from deviating from the oil outlet 3-6.

[0123] like Figure 5 , Figure 6 As shown, Figure 5 Taking the valve body as a ball valve 4 as an example, the schematic diagram of adjusting the movable sealing plug 7 in the direction away from the ball valve 4 is shown. By twisting the movable sealing plug 7, the movable sealing plug 7 is moved away from the ball valve 4, the elastic force of the elastic component 6 is released, and the supporting force of the elastic component 6 on the ball seat 5 is reduced, thereby reducing the pressure of the ball seat 5 on the ball valve 4, increasing the pressure difference between the pressure of the liquid fuel on the ball valve 4 in the first flow channel 3-1 and the pressure of the ball seat 5 on the ball valve 4, thereby increasing the flow rate of the oil outlet 3-6. Figure 6 Taking the valve body as a ball valve 4 as an example, the schematic diagram of adjusting the movable sealing plug 7 towards the direction close to the ball valve 4 is shown. By twisting the movable sealing plug 7, the movable sealing plug 7 is brought close to the ball valve 4, the elastic force of the elastic component 6 is increased, and the supporting force of the elastic component 6 on the ball seat 5 is reduced, thereby reducing the pressure of the ball seat 5 on the ball valve 4, and reducing the pressure difference between the pressure of the liquid fuel on the ball valve 4 in the first flow channel 3-1 and the pressure of the ball seat 5 on the ball valve 4, thereby reducing the flow rate of the oil outlet 3-6.

[0124] like Figure 1As shown, in the embodiment of the present application, an oil filter 2 is provided in the first flow channel 3-1. The oil filter 2 is provided in the first flow channel 3-1, and the fuel enters the first flow channel 3-1 from the liquid fuel channel 10-3 and is first filtered by the oil filter 2, and then passes through the oil outlet 3-6, so as to prevent impurities from accumulating at the oil outlet 3-6 and clogging the oil outlet 3-6.

[0125] like Figure 2 , Figure 7 As shown, in the embodiment of the present application, a sealing groove 3-3 is provided on the outer wall of the body 3, and the sealing groove 3-3 is used to install a sealing ring 12, so that the body 3 is sealed and installed in the liquid fuel channel 10-3. When the flow regulating device 1 is installed in the liquid fuel channel 10-3, a sealing ring 12 is provided in the sealing groove 3-3, and the gap between the outer side of the body 3 and the liquid fuel channel 10-3 can be closed by the sealing ring 12, and all liquid fuel passes through the first flow channel 3-1, thereby ensuring the accuracy of flow regulation.

[0126] like Figure 2 , Figure 7 As shown, in the embodiment of the present application, the outer wall of the body 3 is provided with a groove section 3-9, and along the axial direction of the body 3, the groove section 3-9 is located between the sealing groove 3-3 and the oil inlet, and the bottom wall of the groove section 3-9 is provided with at least one second oil inlet 3-2, and the second oil inlet 3-2 is connected to the first flow channel 3-1. Among them, the outer diameter of the body 3 at the groove section 3-9 is smaller than the outer diameter of other positions of the body 3, so when the flow regulating device 1 is installed in the liquid fuel channel 10-3, a section of accommodating space will be formed between the groove section 3-9 and the inner side wall of the liquid fuel channel 10-3. In the axial direction of the body 3, the groove section 3-9 is located between the first oil inlet 3-5 and the sealing groove 3-3, so this section of accommodating space is also located between the first oil inlet 3-5 and the sealing groove 3-3, so when the fuel in the liquid fuel channel 10-3 seeps into the groove section 3-9 from the gap between the body 3 and the inner side wall of the liquid fuel channel 10-3, it can be collected in the accommodating space. The body 3 is also provided with a second oil inlet 3-2 on the groove section 3-9, and the collected fuel can re-enter the first flow channel 3-1 through the second oil inlet 3-2.

[0127] like Figure 1 , Figure 7 As shown, in the embodiment of the present application, an annular protrusion 3-10 is provided at one end of the body 3 close to the first fuel inlet 3-5, and the annular protrusion 3-10 is used to fit with the annular groove in the liquid fuel channel 10-3. The annular protrusion 3-10 is provided on the body 3 to fit with the annular groove in the liquid fuel channel 10-3, so that the flow regulating device 1 can be firmly set in the liquid fuel channel 10-3.

[0128] The present application sets a flow regulating device 1. When in use, the flow regulating device 1 is set in the liquid fuel channel 10-3. By adjusting the position of the movable sealing plug 7 in the installation cavity 3-8, the flow rate of the liquid fuel at the oil outlet 3-6 position of the first flow channel 3-1 can be adjusted. The liquid fuel flows through the oil outlet 3-6 and then flows out from the installation cavity 3-8, and finally is sprayed out at the liquid fuel nozzle 14. If the flow rate at the oil outlet 3-6 is large, the flow rate at the liquid fuel nozzle 14 is large, and if the flow rate at the oil outlet 3-6 is small, the flow rate at the liquid fuel nozzle 14 is small. That is, the flow characteristics of the liquid fuel at the liquid fuel nozzle 14 can also be adjusted based on the movable sealing plug 7. Therefore, when adjusting the flow characteristics at the liquid fuel nozzle 14, it can be adjusted based on the flow regulating device 1 without repeatedly repairing the liquid fuel nozzle 14. This not only facilitates adjustment, but also avoids the scrapping caused by repairing the liquid fuel nozzle 14.

[0129] like Figure 7 As shown, the present application also proposes a dual-fuel nozzle. In this embodiment, the dual-fuel nozzle includes:

[0130] A housing 10, wherein a liquid fuel passage 10-3 and a gas fuel passage 10-2 are provided in the housing 10;

[0131] The liquid fuel channel 10-3 is provided with the flow regulating device 1 described in any of the above embodiments, and the outlet of the liquid fuel channel 10-3 is provided with a swirler 13 and a liquid fuel nozzle 14;

[0132] The gas fuel channel 10 - 2 is provided with an orifice plate 9 for adjusting the flow of the gas fuel. The outlet of the gas fuel channel 10 - 2 is provided with a gas fuel nozzle 15 .

[0133] like Figure 7 As shown, the flow regulating device 1 is arranged in the liquid fuel channel 10-3, such as the inlet position of the liquid fuel channel 10-3. After the liquid fuel enters the liquid fuel channel 10-3, it flows through the flow regulating device 1. After passing through the flow regulating device 1, it can flow to the swirler 13 according to the required flow rate, and then it can be ejected from the liquid fuel nozzle 14 through the swirler 13. The orifice plate 9 has a throttle hole 9-1. The gas fuel flow rate can be adjusted by changing the size of the throttle hole 9-1. After the gas fuel enters the gas fuel channel 10-2, it passes through the orifice plate 9 and flows to the gas fuel nozzle 15 according to the required flow rate after flow regulation. Therefore, when adjusting the flow characteristics of the liquid fuel nozzle 14, it can be adjusted through the flow regulating device 1, and when adjusting the flow characteristics of the gas fuel nozzle 15, it can be adjusted through the orifice plate 9. The adjustment process is relatively convenient, and there is no need to repeatedly polish and repair the nozzle, which can avoid scrapping caused by polishing and repair.

[0134] like Figure 7As shown, in the embodiment of the present application, the liquid fuel channel 10-3 is further provided with a liquid fuel channel clamp 11 on the outside of the flow regulating device 1; the gas fuel channel 10-2 is further provided with a gas fuel channel clamp 8 on the outside of the orifice plate 9. The liquid fuel channel clamp 11 is provided on the outside of the flow regulating device 1 to ensure the sealing of the liquid fuel channel 10-3 for oil supply, and the gas fuel channel clamp 8 is provided on the outside of the orifice plate 9 to ensure the sealing of the gas fuel channel 10-2 for gas supply.

[0135] like Figure 7 As shown, in the embodiment of the present application, a mounting seat 10-1 is further provided on the outer wall of the shell 10, and a mounting hole is provided on the mounting seat 10-1. Through the mounting hole on the mounting seat 10-1, the dual-fuel nozzle can be installed on equipment such as a gas turbine.

[0136] like Fig. 9 As shown, the present application also proposes a liquid flow rate regulation method, which is applied to the dual-fuel nozzle described in any of the above embodiments, and the method includes the following steps S110-S140:

[0137] Step S110: Determine the effective area of ​​the liquid fuel nozzle and the measured flow rate of the liquid fuel at the liquid fuel nozzle.

[0138] In the embodiment of the present application, after the flow rate regulating device is installed on the dual-fuel nozzle to be regulated, liquid fuel is supplied to the liquid fuel passage and sprayed out from the liquid fuel nozzle.

[0139] The effective area of ​​the liquid fuel nozzle can be obtained based on the theoretical value when the liquid nozzle is designed, represented by A1, and the actual flow rate of the liquid fuel at the liquid fuel nozzle can be measured by a flow meter, represented by W1.

[0140] Step S120: Determine the actual pressure difference between the actual pressure of the liquid fuel after flowing out of the valve body and the actual pressure after flowing out of the liquid fuel nozzle based on the measured flow rate of the liquid fuel at the liquid fuel nozzle and the effective area of ​​the liquid fuel nozzle.

[0141] In step S120, the actual pressure difference between the actual pressure of the liquid fuel after flowing out of the valve body and the actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle can be calculated based on the following formula (1):

[0142]

[0143] Wherein, ρ1 is the density of the liquid fuel, and ΔP1 is the actual pressure difference between the actual pressure of the liquid fuel after flowing out of the valve body and the actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle.

[0144] Step S130: determining the actual pressure of the liquid fuel after flowing out of the valve body based on the actual pressure difference and the actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle.

[0145] Generally speaking, the actual pressure of the liquid fuel at the liquid fuel nozzle is normal pressure, which is represented by P0.

[0146] In step S130, the actual pressure of the liquid fuel after flowing out of the valve body can be determined based on the following formula (2):

[0147] △P1=P2-P0 (2)

[0148] Wherein, P2 is the actual pressure of the liquid fuel after flowing out of the valve body.

[0149] Step S140: adjusting the position of the movable sealing plug based on the actual pressure of the liquid fuel after flowing out of the valve body and the theoretical pressure of the liquid fuel after flowing out of the valve body.

[0150] Among them, the theoretical pressure of the liquid fuel after flowing out of the valve body can be calculated according to the design characteristics of the valve body, represented by P3. Then, after obtaining P2 and P3, the position of the movable sealing plug can be adjusted based on the size of P2 and P3.

[0151] Normally, when selecting a valve body, most of the time, the appropriate valve body is selected based on the delivery power of the liquid fuel source and the theoretical flow rate required by the liquid fuel nozzle, so that the liquid fuel delivered by the liquid fuel source can be ejected from the liquid fuel nozzle at the required theoretical flow rate after losing a part of the pressure when passing through the valve body. However, in reality, the pressure loss of the liquid fuel passing through the valve body is not completely consistent with the theoretical pressure loss of the valve body, that is, the actual flow rate of the liquid fuel nozzle is not necessarily the theoretical flow rate, so the actual flow rate needs to be adjusted.

[0152] In the embodiment of the present application, in the above step S140, the actual pressure P2 of the liquid fuel after flowing out of the valve body can be obtained. If the actual pressure of the liquid fuel after flowing out of the valve body is greater than the theoretical pressure of the liquid fuel after flowing out of the valve body, that is, P2>P3, it means that the actual pressure loss of the liquid fuel in the flow regulating device is less than the theoretical pressure loss, that is, the actual flow rate of the liquid fuel nozzle is greater than the required theoretical flow rate at this time. Then, if the theoretical flow rate is to be achieved, the actual pressure loss of the liquid fuel through the valve body can be increased by increasing the supporting force of the elastic component on the valve body, that is, adjusting the movable sealing plug to a position close to the valve body.

[0153] If the actual pressure of the liquid fuel after flowing out of the valve body is less than the theoretical pressure of the liquid fuel after flowing out of the valve body, that is, P2<P3, it means that the actual pressure loss of the liquid fuel in the flow regulating device is greater than the theoretical pressure loss, that is, the actual flow rate of the liquid fuel nozzle at this time is less than the required theoretical flow rate. Then, if the theoretical flow rate is to be achieved, the actual pressure loss of the liquid fuel passing through the valve body can be reduced by reducing the supporting force of the elastic component on the valve body, that is, adjusting the movable sealing plug to a position away from the valve body.

[0154] If the actual pressure of the liquid fuel after flowing out of the valve body is equal to the theoretical pressure of the liquid fuel after flowing out of the valve body, that is, P2=P3, it means that the actual pressure loss of the liquid fuel in the flow regulating device is exactly the theoretical pressure loss, that is, the actual flow rate of the liquid fuel nozzle at this time is the required theoretical flow rate. At this time, there is no need to adjust the position of the movable sealing plug.

[0155] In the embodiment of the present application, the adjustment distance of the movable sealing plug can be determined by the following formula (3):

[0156] △X=(P2 – P3)*S / K (3)

[0157] Among them, △X represents the compression amount that the elastic component needs to be adjusted, K represents the stiffness of the elastic component, S represents the area of ​​the valve body on which the liquid fuel pressure acts, wherein, if the valve body is a ball valve, S is the contact area between the liquid fuel and the ball valve, if the valve body is a conical valve 16, S is the contact area between the liquid fuel and the conical end 16-1 of the conical valve 16, P2 is the actual pressure of the liquid fuel after flowing out of the valve body, and P3 is the theoretical pressure of the liquid fuel after flowing out of the valve body.

[0158] The above formula (3) can be used to determine the amount of compression that the elastic component needs to adjust, and the amount of compression that the elastic component needs to adjust is the specific distance that the movable sealing plug needs to adjust. In addition, if △X is a positive value, it means that the actual flow rate of the liquid fuel nozzle is too large and needs to be reduced. In this case, the movable sealing plug needs to be adjusted close to the valve body to increase the support force of the elastic component on the valve body, thereby increasing the actual pressure loss of the liquid fuel passing through the valve body; if △X is a negative value, it means that the actual flow rate of the liquid fuel nozzle is too small and needs to be increased. In this case, the movable sealing plug needs to be adjusted away from the valve body to reduce the support force of the elastic component on the valve body, thereby reducing the actual pressure loss of the liquid fuel passing through the valve body.

[0159] The flow regulation method in the embodiment of the present application can adjust the flow of the liquid fuel nozzle by adjusting the position of the movable sealing plug. The adjustment process does not require the liquid fuel nozzle to be repaired, which not only facilitates adjustment but also avoids the scrapping caused by the repair of the liquid fuel nozzle.

[0160] like Fig.10 As shown, the present application also proposes a gas flow rate regulation method, which is applied to the dual-fuel nozzle described in any of the above embodiments, and the method includes the following steps S210-S240:

[0161] Step S210: Determine the effective area of ​​the gas fuel nozzle and the measured flow rate of the gas fuel at the gas fuel nozzle.

[0162] In the embodiment of the present application, the gas fuel is supplied to the gas fuel passage of the dual-fuel nozzle to be adjusted and is ejected from the gas fuel port.

[0163] Among them, the effective area of ​​the gas fuel nozzle can be obtained based on the theoretical value when the gas fuel nozzle is designed, represented by A2, and the actual flow rate of the gas fuel at the gas fuel nozzle can be obtained by actual measurement with a flow meter, represented by W2.

[0164] Step S220: Determine the actual pressure difference between the actual pressure of the gas fuel after flowing out of the orifice plate and the actual pressure after flowing out of the gas fuel nozzle based on the measured flow rate of the gas fuel at the gas fuel nozzle and the effective area of ​​the gas fuel nozzle.

[0165] In step S220, the actual pressure difference between the actual pressure of the gas fuel after flowing out of the orifice plate and the actual pressure of the gas fuel after flowing out of the gas fuel nozzle can be calculated based on the following formula (4):

[0166]

[0167] Wherein, ρ2 is the density of the gas fuel, and ΔP2 is the actual pressure difference between the actual pressure of the gas fuel after flowing out of the orifice plate and the actual pressure of the gas fuel after flowing out of the gas fuel nozzle.

[0168] Step S230: determining the actual pressure of the gas fuel after flowing out of the orifice plate based on the actual pressure difference and the actual pressure of the gas fuel after flowing out of the gas fuel nozzle.

[0169] Generally speaking, the actual pressure of the gas fuel at the gas fuel nozzle is normal pressure, which is represented by P6.

[0170] In step S130, the actual pressure of the gas fuel after flowing out of the orifice plate can be determined based on the following formula (5):

[0171] △P2=P5-P6 (5)

[0172] Wherein, P5 is the actual pressure of the gas fuel after flowing out of the orifice plate.

[0173] Step S240: adjusting the size of the throttling hole on the orifice plate based on the actual pressure of the gas fuel after flowing out of the orifice plate and the theoretical pressure of the gas fuel after flowing out of the orifice plate.

[0174] Among them, the theoretical pressure of the gas fuel after flowing out of the orifice plate can be calculated based on the design characteristics of the orifice plate, represented by P7. After obtaining P5 and P7, the size of the throttling hole on the orifice plate can be adjusted based on the size of P5 and P7.

[0175] Generally, when selecting an orifice plate, the selection is mostly based on the delivery power of the gas fuel source and the theoretical flow rate required by the gas fuel nozzle, so that the gas fuel delivered by the gas fuel source loses a part of the pressure when passing through the orifice plate, and can be ejected from the gas fuel nozzle at the required theoretical flow rate. However, in reality, the pressure loss of the gas fuel passing through the orifice plate is not completely consistent with the theoretical pressure loss of the orifice plate, that is, the actual flow rate of the gas fuel nozzle is not necessarily the theoretical flow rate, so the actual flow rate needs to be adjusted.

[0176] In an embodiment of the present application, the actual pressure of the gas fuel after flowing out of the orifice plate can be obtained in the above step S240. If the actual pressure of the gas fuel after flowing out of the orifice plate is greater than the theoretical pressure of the gas fuel after flowing out of the orifice plate, that is, P5>P7, it means that the actual pressure loss of the gas fuel after passing through the orifice plate is less than the theoretical pressure loss, that is, the actual flow rate of the gas fuel nozzle is greater than the theoretical flow rate at this time. Then, if the theoretical flow rate is to be achieved, the effective area of ​​the throttling hole on the orifice plate can be reduced to increase the actual pressure loss of the gas fuel through the orifice plate.

[0177] If the actual pressure of the gas fuel after flowing out of the orifice plate is less than the theoretical pressure of the gas fuel after flowing out of the orifice plate, that is, P5<P7, it means that the actual pressure loss of the gas fuel after passing through the orifice plate is greater than the theoretical pressure loss, that is, the actual flow rate of the gas fuel nozzle is less than the theoretical flow rate at this time. Then, if the theoretical flow rate is to be achieved, the actual pressure loss of the gas fuel through the orifice plate can be reduced by increasing the effective area of ​​the throttling hole.

[0178] If the actual pressure of the gas fuel after flowing out of the orifice plate is equal to the theoretical pressure of the gas fuel after flowing out of the orifice plate, that is, P5=P7, it means that the actual pressure loss of the gas fuel after passing through the orifice plate is exactly the theoretical pressure loss, that is, the actual flow rate of the gas fuel nozzle is exactly the theoretical flow rate, and there is no need to adjust the effective area of ​​the throttling hole.

[0179] In the embodiment of the present application, when it is necessary to reduce the effective area of ​​the throttling hole, the hole can be blocked or the orifice plate with a smaller effective area of ​​the throttling hole can be replaced; when it is necessary to increase the effective area of ​​the throttling hole, the throttling hole can be repaired or the orifice plate with a larger effective area of ​​the throttling hole can be replaced.

[0180] The gas flow rate regulation method in the embodiment of the present application is to calculate the actual pressure of the gas fuel after passing through the orifice plate, determine the actual pressure loss, and then adjust the effective area of ​​the throttle hole on the orifice plate according to the actual pressure loss and the theoretical pressure loss. The regulation method is simple. The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present application.

[0181] Through the above description, the embodiments of the present application propose the following technical solutions, but are not limited thereto:

[0182] 1. A flow regulating device, the flow regulating device is used to be installed in a liquid fuel channel of a dual-fuel nozzle, the flow regulating device comprising:

[0183] A body, wherein a first flow channel and a mounting cavity are provided in the body, wherein the first flow channel is provided with a first oil inlet and an oil outlet, wherein the first oil inlet is used to communicate with the liquid fuel channel, and the oil outlet is communicated with the mounting cavity;

[0184] a valve body, the valve body being arranged at the oil outlet;

[0185] A movable sealing plug, the movable sealing plug being arranged in the installation cavity;

[0186] An elastic component, wherein the elastic component is arranged in the installation cavity, and along the flow direction of the fuel, one end of the elastic component abuts against the valve body, and the other end abuts against the movable sealing plug;

[0187] Along the flow direction of the fuel, the position of the movable sealing plug in the installation cavity is adjustable, so that the supporting force of the elastic component on the valve body can be adjusted.

[0188] 2. The flow regulating device as described in technical solution 1, wherein the movable sealing plug is provided with an external thread, the inner side wall of the installation cavity is provided with an internal thread adapted to the external thread, and the movable sealing plug is threadedly connected to the installation cavity;

[0189] Along the fuel flow direction, at least one second flow channel is provided on the movable sealing plug.

[0190] 3. In the flow regulating device as described in Technical Solution 1 or 2, an operating groove is provided at the end of the movable sealing plug away from the elastic component.

[0191] 4. In the flow regulating device as described in any one of technical solutions 1 to 3, a first mounting hole is provided at one end of the movable sealing plug close to the elastic component, and one end of the elastic component close to the movable sealing plug is provided in the first mounting hole.

[0192] 5. In the flow regulating device as described in any one of technical solutions 1-4, the valve body is a ball valve, and the flow regulating device also includes a ball seat. The ball valve is arranged at the oil outlet, and the ball seat is arranged between the ball valve and the elastic component. One end of the ball seat supports the ball valve, and the other end abuts against the elastic component.

[0193] 6. The flow regulating device according to any one of technical solutions 1 to 5, wherein the end of the ball seat close to the ball valve is provided with a concave arc surface, and the ball valve is arranged in the arc surface;

[0194] One end of the ball seat close to the elastic component is provided with a second mounting hole, and one end of the elastic component close to the ball seat is arranged in the second mounting hole.

[0195] 7. In the flow regulating device as described in any one of technical solutions 1 to 6, the diameter of the ball seat is the same as the inner diameter of the installation cavity, and the ball seat is sleeved on the inner wall of the installation cavity so that the ball seat can slide along the inner wall of the installation cavity.

[0196] 8. In the flow regulating device as described in any one of technical solutions 1 to 7, at least one third flow channel is provided on the ball seat along the fuel flow direction.

[0197] 9. In the flow regulating device as described in any one of technical solutions 1 to 8, the valve body is a conical valve, the end of the conical valve close to the oil outlet is a conical end, the conical end is arranged at the oil outlet, and the end of the conical valve away from the oil outlet is in contact with the elastic component.

[0198] 10. The flow regulating device as described in any one of technical solutions 1 to 9, wherein a sealing seat is provided at one end of the conical valve away from the oil outlet, the sealing seat is slidably arranged on the inner wall of the mounting cavity, and the elastic component abuts against the sealing seat;

[0199] A fourth flow channel is provided inside the conical valve, a flow channel outlet connected to the fourth flow channel is provided at one end of the sealing seat facing the elastic component, and a flow channel inlet connected to the fourth flow channel is provided on the side wall of the conical valve located between the sealing seat and the oil outlet.

[0200] 11. In the flow regulating device as described in any one of technical solutions 1 to 10, the oil outlet is provided with an adapting surface, and the adapting surface is adapted to the valve body.

[0201] 12. In the flow regulating device as described in any one of technical solutions 1 to 11, an oil filter is provided in the first flow channel.

[0202] 13. In the flow regulating device as described in any one of technical solutions 1 to 12, a sealing groove is provided on the outer side wall of the main body, and the sealing groove is used to install a sealing ring so that the main body is sealed and installed in the liquid fuel channel.

[0203] 14. In the flow regulating device as described in any one of technical solutions 1 to 13, the outer wall of the main body is provided with a groove section, and along the axial direction of the main body, the groove section is located between the sealing groove and the first oil inlet, and the bottom wall of the groove section is provided with at least one second oil inlet, and the second oil inlet is connected to the first flow channel.

[0204] 15. In the flow regulating device as described in any one of technical solutions 1 to 14, an annular protrusion is provided at one end of the main body close to the oil inlet, and the annular protrusion is used to adapt to the annular groove in the liquid fuel channel.

[0205] 16. A dual fuel nozzle comprising:

[0206] a shell, wherein a liquid fuel passage and a gas fuel passage are provided in the shell;

[0207] The liquid fuel channel is provided with a flow regulating device as described in any one of technical solutions 1 to 15, and the outlet of the liquid fuel channel is provided with a swirler and a liquid fuel nozzle in sequence;

[0208] An orifice plate is arranged in the gas fuel channel, and the orifice plate is used to adjust the flow rate of the gas fuel. A gas fuel nozzle is arranged at the outlet of the gas fuel channel.

[0209] 17. As described in the dual-fuel nozzle of technical solution 16, the liquid fuel channel is further provided with a liquid fuel channel clamp ring on the outside of the flow regulating device;

[0210] The gas fuel channel is further provided with a gas fuel channel clamp ring on the outer side of the orifice plate.

[0211] 18. A liquid flow rate regulation method, applied to a dual-fuel nozzle as described in any one of technical solutions 16-17, the method comprising:

[0212] determining an effective area of ​​the liquid fuel nozzle and a measured flow rate of the liquid fuel at the liquid fuel nozzle;

[0213] determining an actual pressure difference between an actual pressure of the liquid fuel after flowing out of the valve body and an actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle based on a measured flow rate of the liquid fuel at the liquid fuel nozzle and an effective area of ​​the liquid fuel nozzle;

[0214] determining an actual pressure of the liquid fuel after flowing out of the valve body based on the actual pressure difference and the actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle;

[0215] The position of the movable sealing plug is adjusted based on the actual pressure of the liquid fuel after flowing out of the valve body and the theoretical pressure of the liquid fuel after flowing out of the valve body.

[0216] 19. The liquid flow rate regulating method according to technical solution 18, wherein the position of the movable sealing plug is adjusted based on the actual pressure of the liquid fuel after flowing out of the valve body and the theoretical pressure of the liquid fuel after flowing out of the valve body, comprising:

[0217] If the actual pressure of the liquid fuel after flowing out of the valve body is greater than the theoretical pressure of the liquid fuel after flowing out of the valve body, adjusting the movable sealing plug to be close to the valve body;

[0218] If the actual pressure of the liquid fuel after flowing out of the valve body is less than the theoretical pressure of the liquid fuel after flowing out of the valve body, adjusting the movable sealing plug away from the valve body;

[0219] If the actual pressure of the liquid fuel after flowing out of the valve body is equal to the theoretical pressure of the liquid fuel after flowing out of the valve body, there is no need to adjust the position of the movable sealing plug.

[0220] 20. In the liquid flow rate regulating method according to technical solution 18 or 19, the regulating distance of the movable sealing plug is determined by the following formula:

[0221] △X=(P2–P3)*S / K;

[0222] Among them, △X represents the compression amount that the elastic component needs to adjust, K represents the stiffness of the elastic component, S represents the area on which the liquid fuel pressure acts on the valve body, P2 is the actual pressure of the liquid fuel after flowing out of the valve body, and P3 is the theoretical pressure of the liquid fuel after flowing out of the valve body.

[0223] 21. A gas flow regulation method, applied to a dual-fuel nozzle as described in any one of technical solutions 16-17, the method comprising:

[0224] determining an effective area of ​​the gas fuel nozzle and a measured flow rate of the gas fuel at the gas fuel nozzle;

[0225] determining an actual pressure difference between an actual pressure of the gas fuel after flowing out of the orifice plate and an actual pressure after flowing out of the gas fuel nozzle based on a measured flow rate of the gas fuel at the gas fuel nozzle and an effective area of ​​the gas fuel nozzle;

[0226] determining the actual pressure of the gas fuel after flowing out of the orifice plate based on the actual pressure difference and the actual pressure of the gas fuel after flowing out of the gas fuel nozzle;

[0227] Based on the actual pressure of the gas fuel after flowing out of the orifice plate and the theoretical pressure of the gas fuel after flowing out of the orifice plate, the effective area of ​​the throttling hole on the orifice plate is adjusted.

[0228] 22. The gas flow regulating method according to technical solution 21, wherein the effective area of ​​the throttling hole on the orifice plate is adjusted based on the actual pressure of the gas fuel after flowing out of the orifice plate and the theoretical pressure of the gas fuel after flowing out of the orifice plate, comprising:

[0229] If the actual pressure of the gas fuel after flowing out of the orifice plate is greater than the theoretical pressure of the gas fuel after flowing out of the orifice plate, reducing the effective area of ​​the throttling hole on the orifice plate;

[0230] If the actual pressure of the gas fuel after flowing out of the orifice plate is less than the theoretical pressure of the gas fuel after flowing out of the orifice plate, increasing the effective area of ​​the throttling hole on the orifice plate;

[0231] If the actual pressure of the gas fuel after flowing out of the orifice plate is equal to the theoretical pressure of the gas fuel after flowing out of the orifice plate, the effective area of ​​the throttling hole on the orifice plate is kept unchanged.

Claims

1. A flow regulating device, characterized in that: The flow regulating device is used to be installed in the liquid fuel channel of the dual-fuel nozzle, and the flow regulating device includes: A body, wherein a first flow channel and a mounting cavity are provided in the body, wherein the first flow channel is provided with a first oil inlet and an oil outlet, wherein the first oil inlet is used to communicate with the liquid fuel channel, and the oil outlet is communicated with the mounting cavity; a valve body, the valve body being arranged at the oil outlet; A movable sealing plug, the movable sealing plug being arranged in the installation cavity; An elastic component, wherein the elastic component is arranged in the installation cavity, and along the flow direction of the fuel, one end of the elastic component abuts against the valve body, and the other end abuts against the movable sealing plug; Along the flow direction of the fuel, the position of the movable sealing plug in the installation cavity is adjustable, so that the supporting force of the elastic component on the valve body can be adjusted.

2. The flow regulating device according to claim 1, characterized in that: The movable sealing plug is provided with an external thread, the inner side wall of the installation cavity is provided with an internal thread adapted to the external thread, and the movable sealing plug is threadedly connected in the installation cavity; Along the fuel flow direction, at least one second flow channel is provided on the movable sealing plug.

3. The flow regulating device according to claim 1, characterized in that: An operating groove is provided at one end of the movable sealing plug away from the elastic component.

4. The flow regulating device according to claim 1, characterized in that: A first mounting hole is provided at one end of the movable sealing plug close to the elastic component, and one end of the elastic component close to the movable sealing plug is arranged in the first mounting hole.

5. The flow regulating device according to claim 1, characterized in that: The valve body is a ball valve, and the flow regulating device also includes a ball seat. The ball valve is arranged at the oil outlet, and the ball seat is arranged between the ball valve and the elastic component. One end of the ball seat supports the ball valve, and the other end abuts against the elastic component.

6. The flow regulating device according to claim 5, characterized in that: The ball seat is provided with a concave arc surface at one end close to the ball valve, and the ball valve is arranged in the arc surface; One end of the ball seat close to the elastic component is provided with a second mounting hole, and one end of the elastic component close to the ball seat is arranged in the second mounting hole.

7. The flow regulating device according to claim 5, characterized in that: The diameter of the ball seat is the same as the inner diameter of the installation cavity, and the ball seat is sleeved on the inner side wall of the installation cavity so that the ball seat can slide along the inner side wall of the installation cavity.

8. A dual fuel nozzle, characterized in that: include: a shell, wherein a liquid fuel passage and a gas fuel passage are provided in the shell; The liquid fuel passage is provided with a flow regulating device as claimed in any one of claims 1 to 7, and the outlet of the liquid fuel passage is provided with a swirler and a liquid fuel nozzle in sequence; An orifice plate is arranged in the gas fuel channel, and the orifice plate is used to adjust the flow rate of the gas fuel. A gas fuel nozzle is arranged at the outlet of the gas fuel channel.

9. A method for regulating liquid flow, applied to the dual-fuel nozzle as claimed in claim 8, the method comprising: determining an effective area of ​​the liquid fuel nozzle and a measured flow rate of the liquid fuel at the liquid fuel nozzle; determining an actual pressure difference between an actual pressure of the liquid fuel after flowing out of the valve body and an actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle based on a measured flow rate of the liquid fuel at the liquid fuel nozzle and an effective area of ​​the liquid fuel nozzle; determining an actual pressure of the liquid fuel after flowing out of the valve body based on the actual pressure difference and the actual pressure of the liquid fuel after flowing out of the liquid fuel nozzle; The position of the movable sealing plug is adjusted based on the actual pressure of the liquid fuel after flowing out of the valve body and the theoretical pressure of the liquid fuel after flowing out of the valve body.

10. A gas flow regulation method, applied to the dual-fuel nozzle as claimed in claim 8, the method comprising: determining an effective area of ​​the gas fuel nozzle and a measured flow rate of the gas fuel at the gas fuel nozzle; determining an actual pressure difference between an actual pressure of the gas fuel after flowing out of the orifice plate and an actual pressure after flowing out of the gas fuel nozzle based on a measured flow rate of the gas fuel at the gas fuel nozzle and an effective area of ​​the gas fuel nozzle; determining the actual pressure of the gas fuel after flowing out of the orifice plate based on the actual pressure difference and the actual pressure of the gas fuel after flowing out of the gas fuel nozzle; Based on the actual pressure of the gas fuel after flowing out of the orifice plate and the theoretical pressure of the gas fuel after flowing out of the orifice plate, the effective area of ​​the throttling hole on the orifice plate is adjusted.

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