Flow measurement device and method

Abstract

The application relates to a flow measuring device and method. The flow measuring device comprises a clamping assembly, a displacement adjusting assembly and a detection assembly. The clamping assembly comprises a clamping body, an oil inlet channel and an air inlet channel. The oil inlet channel and the air inlet channel are arranged on the clamping body, and the oil inlet channel is connected with an oil channel of a dual fuel nozzle, and the air inlet channel is connected with an air channel of the dual fuel nozzle. The displacement adjusting assembly comprises an oil needle lift adjusting piece and an air needle lift adjusting piece arranged in the clamping assembly. The oil needle lift adjusting piece is used for adjusting the movement of an oil needle of the dual fuel nozzle, and the air needle lift adjusting piece is used for adjusting the movement of an air needle of the dual fuel nozzle. The detection assembly is used for detecting the fuel flow of the oil channel and the gas flow of the air channel respectively. The fuel flow and the gas flow of the dual fuel nozzle can be measured through one-time assembly. The lift adjusting is continuous and convenient, and the accuracy of the oil and gas flow measurement is improved.

Description

Technical Field

[0001] This application relates to the field of internal combustion engine technology, and in particular to flow measurement devices and methods. Background Technology

[0002] Traditional nozzle structures typically include a needle valve body and a needle valve. The needle valve body is slidably fitted onto the outside of the needle valve, and the two are coupled together, allowing only one type of fuel to be injected. In contrast, high-pressure direct injection dual-fuel injectors, also known as diesel-ignition gas injectors, use dual-fuel nozzles. These nozzles consist of a gas needle, a fuel needle, and a needle valve body, arranged coaxially from the inside out. A fuel passage connects the fuel and fuel needles, while a fuel passage connects the fuel needle and the needle valve body, enabling the injection of both fuel (oil and gas).

[0003] Measuring the fuel injection volume of a dual-fuel nozzle requires mounting the entire nozzle onto a fuel injection measurement fixture for adjustment and measurement. Similarly, measuring the air injection volume requires mounting the entire nozzle onto an air injection measurement fixture for adjustment and measurement. This process involves multiple complex disassemblies and reassemblies to complete the fuel-air flow measurement, resulting in complex operations, low measurement efficiency, and the need to replace the dual-fuel nozzle with different fixtures, which easily introduces measurement errors.

[0004] Therefore, the aforementioned dual-fuel nozzle has the problem of needing to be mounted on different fixtures for oil and gas flow measurement, which is inconvenient to operate. Summary of the Invention

[0005] Therefore, it is necessary to provide a flow measurement device and method to address the problem that dual-fuel nozzles require mounting on different fixtures for oil and gas flow measurement, which is inconvenient to operate.

[0006] An embodiment of the first aspect of this application provides a flow measurement device for measuring the flow rate of a dual-fuel nozzle, the flow measurement device comprising:

[0007] A clamping assembly for clamping and fixing the dual-fuel nozzle, the clamping assembly including a clamping body, an oil inlet channel and an air inlet channel, the oil inlet channel and the air inlet channel being disposed on the clamping body, and the oil inlet channel being connected to the oil passage of the dual-fuel nozzle, and the air inlet channel being connected to the air passage of the dual-fuel nozzle;

[0008] A displacement adjustment assembly includes an oil needle lift adjustment member and an air needle lift adjustment member disposed within the clamping assembly. The oil needle lift adjustment member is used to adjust the movement of the oil needle of the dual-fuel nozzle, and the air needle lift adjustment member is used to adjust the movement of the air needle of the dual-fuel nozzle.

[0009] The detection component is used to detect the flow rate of fuel injected from the oil circuit and the flow rate of gas injected from the gas circuit, respectively.

[0010] In one embodiment, both the oil needle lift adjustment member and the air needle lift adjustment member are rod-shaped structures. The air needle lift adjustment member is sleeved on the outside of the oil needle lift adjustment member, and the air needle lift adjustment member and the oil needle lift adjustment member can slide relative to each other. The air needle lift adjustment member and the clamping body can slide relative to each other.

[0011] In one embodiment, the inner wall of the air needle lift adjustment component and the outer wall of the oil needle lift adjustment component are threaded together.

[0012] The outer wall of the air needle lift adjustment component is threadedly connected to the clamping body.

[0013] In one embodiment, the displacement adjustment assembly further includes an oil needle displacement detector and an air needle displacement detector, wherein the oil needle displacement detector is disposed on the oil needle lift adjustment assembly, and the air needle displacement detector is disposed on the air needle lift adjustment assembly.

[0014] In one embodiment, the displacement adjustment component further includes:

[0015] The first oil return mechanism includes a first oil return chamber and a first oil return channel that are connected to each other. The first oil return chamber is disposed between the outer wall of the oil needle lift adjustment member and the inner wall of the air needle lift adjustment member. The first oil return channel passes through the air needle lift adjustment member and the clamping body.

[0016] The second oil return mechanism includes a second oil return chamber and a second oil return channel that are connected to each other. The second oil return chamber is located between the outer wall of the air needle lift adjustment member and the inner wall of the clamping body. The second oil return channel passes through the air needle lift adjustment member and connects the second oil return chamber with the first oil return chamber.

[0017] In one embodiment, the detection component includes an adapter disposed at the injection position of the dual-fuel nozzle. The adapter includes a fuel volume chamber and a gas volume chamber that are independently disposed. When the fuel needle moves open, the fuel volume chamber is connected to the fuel circuit, and fuel in the fuel circuit is injected into the fuel volume chamber. When the gas needle moves open, the gas volume chamber is connected to the gas circuit, and gas in the gas circuit is injected into the gas volume chamber.

[0018] In one embodiment, the detection component further includes a fuel flow meter and a gas flow meter, the fuel flow meter being disposed at the outlet of the fuel volume chamber and the gas flow meter being disposed at the outlet of the gas volume chamber.

[0019] In one embodiment, the clamping assembly further includes a communicating sealing oil channel and a sealing oil cavity, the sealing oil cavity being disposed between the outer wall of the gas needle and the inner wall of the needle valve body of the dual fuel nozzle, and the sealing oil channel penetrating the clamping body and the needle valve body.

[0020] In one embodiment, the clamping assembly further includes a fastening cap, the ends of the clamping body and the dual-fuel nozzle abutting each other, and the fastening cap being detachably connected circumferentially to the outside of the connection position between the clamping body and the dual-fuel nozzle.

[0021] An embodiment of the second aspect of this application provides a flow measurement method, based on the flow measurement device described above, the flow measurement method comprising:

[0022] Reset the oil needle and air needle to their original positions, and mark them as zero.

[0023] Fuel is introduced into the fuel inlet channel and fuel line. While keeping the needle valve lift adjustment component in place, the needle valve lift adjustment component is adjusted to the lift position to be tested, and the fuel injection flow rate of the dual-fuel nozzle at the corresponding lift position is measured; or...

[0024] Gas is introduced into the intake channel and gas path. The gas needle lift adjustment component is adjusted to drive the oil needle lift adjustment component to the lift position to be tested, and the jet flow rate of the dual fuel nozzle at the corresponding lift position to be tested is tested.

[0025] In one embodiment, before introducing the gas into the intake passage and the gas path, the method further includes: introducing fuel into the fuel inlet passage and the fuel path, and introducing sealing oil into the sealing oil chamber.

[0026] The aforementioned flow measurement device can measure the flow rate of fuel oil and gas from dual-fuel nozzles with a single assembly. Furthermore, by adjusting the fuel needle lift adjustment component and the gas needle lift adjustment component, it can measure the flow rate at different needle lifts. Lift adjustment is continuous and convenient, greatly reducing the number of assembly steps for the dual-fuel nozzle. The device features a simple structure, easy disassembly and assembly, convenient operation, high reliability, and saves equipment space and testing time. Moreover, in the same assembly, the matching states of the fuel inlet channel and fuel circuit, the fuel inlet channel and fuel circuit, the connection state of the fuel needle lift adjustment component and the fuel needle, and the connection state of the gas needle lift adjustment component and the gas needle can be kept largely consistent, reducing the impact on fuel and gas flow measurement and improving the accuracy of fuel and gas flow measurement. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the internal structure of the flow measurement device according to an embodiment of this application.

[0028] Figure 2This is a schematic diagram showing the connection between the clamping assembly and the dual fuel nozzle of the flow measurement device according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the detection component of the flow measurement device according to an embodiment of this application.

[0030] In the picture:

[0031] 1-Clamping assembly; 11-Clamping body; 12-Oil inlet channel; 13-Air inlet channel; 14-Sealing oil channel; 15-Sealing oil cavity; 16-Fastening cap;

[0032] 2-Displacement adjustment assembly; 21-Oil needle lift adjustment component; 22-Air needle lift adjustment component; 23-Oil needle displacement detection component; 24-Air needle displacement detection component; 25-First oil return mechanism; 251-First oil return chamber; 252-First oil return channel; 26-Second oil return mechanism; 261-Second oil return chamber; 262-Second oil return channel; 27-First seal; 28-Second seal;

[0033] 3-Detection component; 31-Adapter; 311-Fuel volume chamber; 312-Gas volume chamber; 32-Fuel flow meter; 33-Gas flow meter; 34-Oil-gas separator; 35-Oil tank;

[0034] 4-Dual fuel nozzle; 41-Fuel needle; 42-Gas needle; 43-Needle valve body; 44-Fuel passage; 45-Gas passage; 46-Receiving cavity; 47-Fuel injection hole; 48-Gas injection hole. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] See Figure 1 , Figure 1A schematic diagram of the internal structure of a flow measurement device according to an embodiment of this application is shown. The flow measurement device provided in this embodiment is used to measure the flow rate of a dual-fuel nozzle 4. The flow measurement device includes a clamping assembly 1, a displacement adjustment assembly 2, and a detection assembly 3. The clamping assembly 1 can clamp and fix the dual-fuel nozzle 4. The clamping assembly 1 includes a clamping body 11, an oil inlet channel 12, and an air inlet channel 13. The oil inlet channel 12 and the air inlet channel 13 are independently arranged on the clamping body 11. After the clamping assembly 1 is clamped and fixed to the dual-fuel nozzle 4, the oil inlet channel 12 is connected to the oil passage 44 of the dual-fuel nozzle 4 to facilitate the introduction of fuel oil. The air inlet channel 13 is connected to the air passage 45 of the dual-fuel nozzle 4 to facilitate the introduction of natural gas.

[0042] The displacement adjustment component 2 is disposed within the clamping component 1. The displacement adjustment component 2, supported by the clamping component 1, adjusts the lift of the dual-fuel nozzle 4. The displacement adjustment component 2 includes an oil needle lift adjustment component 21 and an air needle lift adjustment component 22. These two components can be independently disposed within the clamping component 1. The oil needle lift adjustment component 21 connects to the oil needle 41 of the dual-fuel nozzle 4 to adjust the movement of the oil needle 41, thereby adjusting the oil needle 41 to different lift positions to be tested. The air needle lift adjustment component 22 connects to the air needle 42 of the dual-fuel nozzle 4 to adjust the movement of the air needle 42, thereby adjusting the air needle 42 to different lift positions to be tested.

[0043] The detection component 3 can be set at the injection position of the dual fuel nozzle 4 to detect the fuel flow rate injected from the fuel line 44 and the gas flow rate injected from the gas line 45 respectively.

[0044] With this configuration, the dual-fuel nozzle 4 is mounted on the clamping assembly 1, and the fuel inlet channel 12 is connected to the fuel line 44, and the air intake channel 13 is connected to the air line 45. When it is necessary to measure the fuel injection flow rate, the needle lift adjustment component 22 and the needle 42 remain in the same position, while the fuel needle lift adjustment component 21 adjusts the needle 41 to move to different lift positions to be detected, allowing fuel to be introduced into the fuel inlet channel 12 and the fuel line 44. The detection assembly 3 can then detect the fuel flow rate injected from the fuel line 44 corresponding to this lift position. When it is necessary to measure the gas injection flow rate, the needle lift adjustment component 22 can adjust the needle lift adjustment component 21 to move together, so that the needle 42 and the fuel needle 41 can move together to different lift positions to be detected, allowing gas to be introduced into the air intake channel 13 and the air line 45. The detection assembly 3 can then detect the gas flow rate injected from the air line 45 corresponding to this lift position.

[0045] This embodiment allows for the measurement of fuel and gas flow rates of the dual-fuel nozzle 4 through a single assembly. Furthermore, by adjusting the fuel needle lift adjuster 21 and the gas needle lift adjuster 22, flow rates at different lifts of the fuel needle 41 and gas needle 42 can be measured. The lift adjustment is continuous and convenient, significantly reducing the number of assembly steps for the dual-fuel nozzle 4. The structure is simple, easy to assemble and disassemble, convenient to operate, highly reliable, and saves equipment space and testing time. Moreover, in the same assembly, the coordination states of the fuel inlet channel 12 and fuel line 44, the air inlet channel 13 and air line 45, the connection state of the fuel needle lift adjuster 21 and fuel needle 41, and the connection state of the gas needle lift adjuster 22 and gas needle 42 can be largely consistent, reducing the impact on fuel and gas flow rate measurement, improving the accuracy of fuel and gas flow rate measurement, and solving the problem that the dual-fuel nozzle 4 requires assembly on different fixtures for fuel and gas flow rate measurement, which is inconvenient to operate.

[0046] In this embodiment, the engagement method between the needle lift adjuster 21 and the needle 41 can be selected according to actual usage needs. Optionally, the needle lift adjuster 21 and the needle 41 can only be press-fitted. During the upward movement of the needle lift adjuster 21, the needle 41 can be pushed upward by the fuel pressure in the oil passage 44 and move upward with the needle lift adjuster 21. During the downward movement of the needle lift adjuster 21, the needle 41 is directly pushed downward by the needle lift adjuster 21. Optionally, the needle lift adjuster 21 and the needle 41 can be detachably connected, and the needle lift adjuster 21 can also directly drive the needle 41 to move up and down. Similarly, the matching method between the needle lift adjustment component 22 and the needle 42 can be selected according to actual usage needs. Optionally, the needle lift adjustment component 22 and the needle 42 can only be in press-fit contact. During the upward movement of the needle lift adjustment component 22, the needle 42 can be pushed upward with the needle lift adjustment component 22 under the pressure of the gas in the gas passage 45; during the downward movement of the needle lift adjustment component 22, the needle 42 is directly pushed downward by the needle lift adjustment component 22. Optionally, the needle lift adjustment component 22 and the needle 42 can be detachably connected, and the needle lift adjustment component 22 can also directly drive the needle 42 to move up and down.

[0047] See Figure 1In some embodiments, both the oil needle lift adjuster 21 and the air needle lift adjuster 22 are rod-shaped structures. The air needle lift adjuster 22 has a hollow inner cavity to facilitate its fitting with the oil needle lift adjuster 21, i.e., the air needle lift adjuster 22 is fitted onto the outside of the oil needle lift adjuster 21. Furthermore, the air needle lift adjuster 22 and the oil needle lift adjuster 21 can slide relative to each other, allowing the oil needle lift adjuster 21 to slide axially relative to the air needle lift adjuster 22, thereby adjusting the lift of the oil needle 41. The air needle lift adjuster 22 can also slide relative to the clamping body 11, i.e., the air needle lift adjuster 22 can slide axially relative to the clamping body 11, thereby adjusting the lift of the air needle 42.

[0048] It should be noted that the displacement adjustment assembly 2 may also include a first drive mechanism and a second drive mechanism. The first drive mechanism is used to drive the oil needle lift adjustment component 21 to move axially up and down, so as to adjust the axial relative position between the oil needle 41 lifting adjustment component and the air needle lift adjustment component 22, making the adjustment operation more convenient and faster. The driving method of the first drive mechanism can be, but is not limited to, electric, hydraulic or pneumatic. Optionally, the first drive mechanism can be mounted on the clamp 11. The first drive mechanism may include a motor and an electric push rod that are connected in a transmission relationship. The electric push rod can be connected in a transmission relationship with the oil needle lift adjustment component 21. The motor drives the electric push rod to move, and the oil needle lift adjustment component 21 can move with the electric push rod, thereby realizing the adjustment of the relative position. Of course, the first drive mechanism may also include a motor and a lead screw nut cooperation structure, with the nut connected in a transmission relationship with the oil needle lift adjustment component 21, or the first drive mechanism may also include a hydraulic cylinder or a pneumatic cylinder, both of which can move and adjust the oil needle lift adjustment component 21.

[0049] The second drive mechanism is used to drive the air needle lift adjustment component 22 to move axially up and down, so as to adjust the axial relative position between the air needle lift adjustment component 22 and the clamping body 11, making the adjustment operation more convenient and faster. The driving method of the second drive mechanism can be, but is not limited to, electric, hydraulic or pneumatic drive. The specific driving method of the second drive mechanism for the air needle lift adjustment component 22 can be referred to the driving method of the first drive mechanism for the oil needle lift adjustment component 21, as the driving methods of the two are similar and will not be described again here.

[0050] See Figure 1In some embodiments, the inner wall of the air needle lift adjusting component 22 and the outer wall of the oil needle lift adjusting component 21 are threaded together. This means that the relative position between the oil needle lift adjusting component 21 and the air needle lift adjusting component 22 can be adjusted by rotating the oil needle lift adjusting component 21. This is convenient, and the threaded fit provides high adjustment accuracy. Similarly, the outer wall of the air needle lift adjusting component 22 and the clamping body 11 are threaded together. This also means that the relative position between the air needle lift adjusting component 22 and the clamping body 11 can be adjusted by rotating the air needle lift adjusting component 22. This is convenient, and the threaded fit allows for adjustment of one thread pitch per revolution, providing high adjustment accuracy.

[0051] See Figure 1 In some embodiments, the displacement adjustment assembly 2 further includes an oil needle displacement detector 23 and an air needle displacement detector 24. The oil needle displacement detector 23 is disposed on the oil needle lift adjustment assembly 21 and is used to detect the lift of the oil needle lift adjustment assembly 21 in real time. The air needle displacement detector 24 is disposed on the air needle lift adjustment assembly 22 and is used to detect the lift of the air needle lift adjustment assembly 22 in real time. With this configuration, the reset of the oil needle lift adjustment assembly 21 and the air needle lift adjustment assembly 22, as well as the different lifts, can be detected by the corresponding detectors to determine whether they have moved to the correct position. This makes the lift adjustment of the oil needle 41 and the air needle 42 more precise and improves the flow measurement accuracy of the dual-fuel nozzle 4.

[0052] In this embodiment, the oil needle displacement detection element 23 and the air needle displacement detection element 24 can be, but are not limited to, displacement sensors, capable of detecting the lift of the oil needle lift adjustment element 21 and the air needle lift adjustment element 22. Alternatively, the oil needle displacement detection element 23 and the air needle displacement detection element 24 can be, but are not limited to, displacement scale markings. These markings can also display the numerical value of the lift of the oil needle lift adjustment element 21 and the air needle lift adjustment element 22. The displacement scale markings are scale lines that display the relative movement position, and the values ​​on the scale lines correspond one-to-one with the lift position of the corresponding oil needle displacement detection element 23 or air needle displacement detection element 24. Specifically, the displacement scale markings can be set on the outer wall of the oil needle lift adjustment element 21. By reading the scale markings on the oil needle lift adjustment element 21 that extend beyond the end of the air needle lift adjustment element 22, the lift of the oil needle 41 can be read, making adjustment convenient.

[0053] See Figure 1In some embodiments, the displacement adjustment assembly 2 further includes a first oil return mechanism 25, which includes a first oil return chamber 251 and a first oil return channel 252 that are connected to each other. The first oil return chamber 251 is disposed between the outer wall of the oil needle lift adjustment member 21 and the inner wall of the air needle lift adjustment member 22. If the fuel in the oil passage 44 leaks at the mating surfaces of the oil needle 41 and the air needle 42, the leaked fuel can flow into the first oil return chamber 251 for storage. The first oil return channel 252 penetrates the side wall of the air needle lift adjustment member 22 and the clamp body 11 to connect the first oil return chamber 251 with the oil return storage member outside the clamp body 11, so as to recover the fuel output in the first oil return chamber 251 to the outside of the clamp body 11, which greatly reduces the leakage and turbulence of fuel between the oil needle 41 and the air needle 42.

[0054] In this embodiment, the end of the needle lift adjusting member 21 near the needle 41 can be referred to as the first connecting end. A groove can be formed circumferentially on the side of the first connecting end. The groove surrounds and cooperates with the inner wall of the needle lift adjusting member 22 and the end of the needle 41 to form the first return oil chamber 251. The end of the needle lift adjusting member 21 away from the needle 41 is referred to as the first adjusting end. A first sealing member 27 is provided between the side of the first adjusting end and the inner wall of the needle lift adjusting member 22. The first sealing member 27 can be, but is not limited to, a sealing ring, which can further block and seal the fuel in the return oil chamber, reducing fuel leakage from between the needle lift adjusting member 21 and the needle lift adjusting member 22. Similarly, the end of the needle lift adjustment component 22 that is away from the needle 42 is called the second adjustment end. A second sealing component 28 is provided between the side of the second adjustment end and the inner wall of the clamp body 11. The second sealing component 28 may be, but is not limited to, a sealing ring, which can seal the needle lift adjustment component 22 and the clamp body 11.

[0055] See Figure 1 In some embodiments, the displacement adjustment assembly 2 further includes a second oil return mechanism 26. The second oil return mechanism 26 includes a second oil return chamber 261 and a second oil return channel 262 that are connected. The second oil return chamber 261 is disposed between the outer wall of the needle lift adjustment member 22 and the inner wall of the clamping body 11. If the fuel in the oil passage 44 leaks at the mating surface on the side of both the needle 42 and the needle valve body 43, the leaked fuel can flow into the second oil return chamber 261. The second oil return channel 262 passes through the needle lift adjustment member 22 and connects the second oil return chamber 261 with the first oil return chamber 251, so that the fuel in the second oil return chamber 261 can flow into the first oil return chamber 251 and then be output to the outside of the clamping body 11.

[0056] See Figure 1 and Figure 3In some embodiments, the detection component 3 includes an adapter 31, which is positioned at the injection location of the dual-fuel nozzle 4 to facilitate the measurement of the fuel and gas injected by the dual-fuel nozzle 4. The adapter 31 includes a fuel volume chamber 311 and a gas volume chamber 312, which are independently configured. The fuel volume chamber 311 is connected to the fuel passage 44, and the gas volume chamber 312 is connected to the gas passage 45. This configuration allows fuel injected from the fuel passage 44 of the dual-fuel nozzle 4 to enter the fuel volume chamber 311. By measuring the fuel flow rate in the fuel volume chamber 311, the corresponding fuel injection quantity of the fuel passage 44 can be obtained. Similarly, gas injected from the gas passage 45 of the dual-fuel nozzle 4 can enter the gas volume chamber 312. By measuring the gas flow rate in the gas volume chamber 312, the corresponding gas injection quantity of the gas passage 45 can be obtained. In this embodiment, by using the adapter 31, the injected fuel and gas can be separately measured after a single assembly, greatly reducing mutual interference between the two measurement processes.

[0057] In this embodiment, the fuel volume chamber 311 and the gas volume chamber 312 can be adaptively designed according to the fuel and gas injection positions of the dual-fuel nozzle 4. For example, the dual-fuel nozzle 4 is provided with multiple fuel injection holes 47 and gas injection holes 48. The fuel injection holes 47 are the outlets of the fuel passage 44, and the gas injection holes 48 are the outlets of the gas passage 45. The multiple gas injection holes 48 are arranged around the fuel injection holes 47. Then, the fuel volume chamber 311 is connected to the multiple fuel injection holes 47, and the gas volume chamber 312 can be arranged on the outer circumference of the fuel volume chamber 311, and the gas volume chamber 312 is connected to the multiple gas injection holes 48.

[0058] In some embodiments, the detection component 3 further includes a fuel flow meter 32 and a gas flow meter 33. The fuel flow meter 32 is disposed at the outlet of the fuel volume chamber 311 to measure the fuel flow rate of the fuel volume chamber 311, thereby obtaining the fuel injection flow rate value of the fuel line 44. Specifically, a fuel line may be connected to the outlet of the fuel volume chamber 311, and the fuel flow meter 32 may be connected in series on the fuel line. The gas flow meter 33 is disposed at the outlet of the gas volume chamber 312 to measure the gas flow rate of the gas volume chamber 312, thereby obtaining the gas injection flow rate value of the gas line 45. Specifically, a gas line may be connected to the outlet of the gas volume chamber 312, and the gas flow meter 33 may be connected in series on the gas line.

[0059] In this embodiment, the detection component 3 further includes an oil-gas separator 34, which can be connected in series between the outlet of the gas volume chamber 312 and the gas flow meter 33. The oil-gas separator 34 can separate the fuel oil mixed in the gas, making the gas flow test more accurate and also protecting the gas flow meter 33 from interference from liquid fuel oil, which would reduce the test accuracy. The detection component 3 also includes an oil tank 35, and the outlet of the fuel flow meter 32 and the oil outlet of the oil-gas separator 34 can be connected to the oil tank 35, which can store the outflowing fuel oil.

[0060] In some embodiments, the clamping assembly 1 further includes a communicating sealing oil channel 14 and a sealing oil chamber 15. The sealing oil chamber 15 is disposed between the outer wall of the gas needle 42 and the inner wall of the needle valve body 43 of the dual-fuel nozzle 4, and is used to seal the mating side of the gas needle 42 and the needle valve body 43. The sealing oil channel 14 passes through the clamping body 11 and the needle valve body 43, and is used to introduce sealing oil into the sealing oil chamber 15. With this configuration, when measuring the gas flow rate in the gas path 45, the sealing oil can enter the sealing oil chamber 15 through the sealing oil channel 14, so as to seal the mating side of the gas needle 42 and the needle valve body 43, greatly reducing gas leakage between the gas needle 42 and the needle valve body 43, and improving the accuracy of gas flow rate measurement.

[0061] The sealing oil cavity 15 can be, but is not limited to, an annular groove. Multiple sealing oil cavities 15 can be arranged along the axial direction of the gas needle 42, and adjacent sealing oil cavities 15 are connected. A receiving cavity 46 can be provided between the gas needle 42 and the oil needle 41, which can store fuel to a certain extent and fill fuel to provide a certain sealing effect when measuring gas flow.

[0062] See Figure 1-2 In some embodiments, the clamping assembly 1 further includes a fastening cap 16, with the ends of the clamping body 11 and the dual-fuel nozzle 4 abutting each other to form an end-face seal, reducing leakage of fuel and gas at their end faces. The fastening cap 16 is detachably connected to the outer circumferential direction of the connection position between the clamping body 11 and the dual-fuel nozzle 4, that is, the fastening cap 16 can be sleeved on the outer circumferential direction of the clamping body 11 and the needle valve body 43. One end of the fastening cap 16 is connected to the clamping body 11, and the other end of the fastening cap 16 is connected to the needle valve body 43 to fasten the connection between the two.

[0063] The connection between the fastening cap 16 and the clamping body 11, and between the fastening cap 16 and the needle valve body 43, can be, but is not limited to, threaded connection, snap-fit ​​connection, or magnetic connection. The fastening cap 16 can be, but is not limited to, a nozzle fastening cap. Optionally, one end of the fastening cap 16 can be provided with an inwardly bent flange, and the side of the needle valve body 43 can be provided with a recess. After one end of the fastening cap 16 is connected to the needle valve body 43 through the snap-fit ​​structure formed by the flange and the recess, the other end of the fastening cap 16 is threadedly connected to the clamping body 11. The connection is convenient to use and is firmly and tightly fixed. The inner diameter of the clamping body 11 is larger than the outer diameter of the air needle 42, so that the air needle 42 can be moved into the inner cavity of the clamping body 11 for flow measurement at different lifts. The clamping body 11 allows the air needle 42 to move at the designed test lift without being limited by assembly errors or the diameter tolerance of the mating parts.

[0064] See Figure 1-2 Another embodiment of this application provides a flow measurement method based on the above-described flow measurement device. The flow measurement method includes:

[0065] Reset the oil needle 41 and air needle 42 to zero, so as to determine the reference standard for subsequent adjustment of the oil needle 41 and air needle 42. At this time, the end positions of both oil needle 41 and air needle 42, and the end positions of both air needle 42 and needle valve body 43 can form seat seals, and the readings of the oil needle displacement detection element 23 and air needle displacement detection element 24 of the displacement adjustment assembly 2 are reset to zero.

[0066] Fuel is introduced into the fuel inlet channel 12 and the fuel line 44. The position of the needle lift adjustment component 22 remains unchanged. The fuel needle lift adjustment component 21 is adjusted to the lift position to be tested. The fuel injection flow of the dual fuel nozzle 4 at the corresponding lift position is tested. That is, the fuel needle lift adjustment component 21 can adjust the fuel needle 41 to different lifts. The fuel injection flow of the fuel line 44 at different lifts can be measured separately with one assembly.

[0067] Alternatively, gas can be introduced into the intake passage 13 and the gas path 45, and the gas needle lift adjustment component 22 can be adjusted to drive the oil needle lift adjustment component 21 to the lift position to be tested. The jet flow rate of the dual fuel nozzle 4 of the gas needle 42 at the corresponding lift position to be tested can be tested. The gas needle lift adjustment component 22 can adjust the gas needle 42 to different lifts. The jet flow rate of the gas path 45 at different lifts can be measured separately with one assembly.

[0068] This configuration allows for a single assembly of the dual-fuel nozzle 4 with the clamping assembly 1. By adjusting the oil needle lift adjustment component 41 and the air needle lift adjustment component 22 to different lift positions, the fuel injection flow rate and air jet flow rate of the dual-fuel nozzle 4 at different lift levels can be measured separately. This significantly reduces the number of assembly steps for the dual-fuel nozzle 4 and simplifies operation. Furthermore, in the same assembly, the matching states of the fuel inlet channel 12 and the fuel passage 44, the matching states of the air inlet channel 13 and the air passage 45, the connection state of the oil needle lift adjustment component 21 and the oil needle 41, and the connection state of the air needle lift adjustment component 22 and the air needle 42 can be kept largely consistent, reducing the impact on fuel and air flow rate measurement and improving the accuracy of fuel and air flow rate measurement.

[0069] In some embodiments, before introducing the gas into the intake passage 13 and the gas path 45, the following is also included:

[0070] Fuel is introduced into the inlet channel 12 and the oil passage 44, and sealing oil is introduced into the sealing oil chamber 15, so as to reduce the leakage of gas from the oil needle 41 and the gas needle 42, the gas needle 42 and the needle valve body 43, and the needle valve body 43 and the clamp body 11, thereby improving the measurement accuracy of gas flow.

[0071] In summary, the flow measurement process of the oil needle 41 is explained in conjunction with the flow measurement device:

[0072] First, the lift adjustment rod of the air needle 42 moves down, causing the air needle 42 to come into contact with the needle valve body 43, forming a seat seal. The lift adjustment rod of the oil needle 41 moves down, causing the oil needle 41 to come into contact with the air needle 42, forming a seat seal. At this time, the readings of the oil needle displacement detection element 23 and the air needle displacement detection element 24 of the displacement adjustment assembly 2 are reset to zero.

[0073] Then, open the oil inlet channel 12, and fuel can flow into the oil inlet channel 12 and oil line 44 in sequence. By reading the stroke data of the oil needle displacement detection element 23, the lift of the oil needle 41 adjustment rod is adjusted to different lift positions to be tested for the oil needle 41 flow test. It can be continuously adjusted. During this process, the position of the air needle lift adjustment element 22 remains unchanged. When the oil needle 41 is lifted, fuel is injected from the fuel injection hole 47 into the fuel volume chamber 311, and then passes through the fuel flow meter 32. By reading the data of the fuel flow meter 32, the flow rate of the oil needle 41 at this lift position to be tested can be obtained. The tested fuel can be introduced into the oil tank 35.

[0074] The flow measurement process of the air needle 42 is explained in conjunction with the flow measurement device:

[0075] First, the lift adjustment rod of the air needle 42 moves down, causing the air needle 42 to come into contact with the needle valve body 43, forming a seat seal. The lift adjustment rod of the oil needle 41 moves down, causing the oil needle 41 to come into contact with the air needle 42, forming a seat seal. At this time, the readings of the oil needle displacement detection element 23 and the air needle displacement detection element 24 of the displacement adjustment assembly 2 are reset to zero.

[0076] Then, the sealing oil passage 14 and the oil inlet passage 12 are opened first, and the sealing oil enters the sealing oil chamber 15 through the sealing oil passage 14 to form a seal between the air needle 42 and the needle valve body 43. At the same time, fuel enters the oil passage 44 from the oil inlet passage 12 to form a seal between the oil needle 41 and the air needle 42. Then the intake passage 13 can be opened, and the gas can flow into the intake passage 13 and the gas passage 45 in sequence. By reading the stroke data of the needle displacement detection element 24, the lift of the needle 42 lift adjustment rod can be adjusted to different lift positions to be tested for the flow test of the needle 42. It can be continuously adjusted. During this process, the oil needle lift adjustment element 21 and the needle lift adjustment element 22 are kept moving synchronously. When the needle 42 is lifted, the gas is injected from the gas injection hole 48 into the gas volume chamber 312, and then flows into the oil-gas separator 34. Then it passes through the gas flow meter 33. By reading the data of the gas flow meter 33, the flow rate of the needle 42 at this lift position can be obtained. The tested gas can be discharged to the atmosphere, and the fuel separated by the oil-gas separator 34 can be introduced into the oil tank 35.

[0077] The inlet pressure of the oil inlet channel 12 is the same as that of the sealing oil channel 14. The inlet pressure of the air inlet channel 13 can be less than that of the oil inlet channel 12 and the sealing oil channel 14. The pressure difference between the oil and the air can be, but is not limited to, 5 bar.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A flow measuring device for flow measuring of a dual fuel nozzle (4), characterized in that, The flow measuring device comprises: A clamping assembly (1) for clamping and fixing the dual fuel nozzle (4), the clamping assembly (1) comprising a clamping body (11), an oil inlet channel (12) and an air inlet channel (13), the oil inlet channel (12) and the air inlet channel (13) being arranged on the clamping body (11), and the oil inlet channel (12) being in communication with an oil channel (44) of the dual fuel nozzle (4), and the air inlet channel (13) being in communication with an air channel (45) of the dual fuel nozzle (4); A displacement adjusting assembly (2) comprising an oil needle lift adjusting member (21) and an air needle lift adjusting member (22) arranged in the clamping assembly (1), the oil needle lift adjusting member (21) being used for adjusting the movement of an oil needle (41) of the dual fuel nozzle (4), and the air needle lift adjusting member (22) being used for adjusting the movement of an air needle (42) of the dual fuel nozzle (4); A detection assembly (3) for detecting the fuel flow of the oil channel (44) and the fuel gas flow of the air channel (45) respectively, the detection assembly (3) comprising an adapter (31) arranged at a spraying position of the dual fuel nozzle (4), the adapter (31) comprising a fuel volume cavity (311) and a fuel gas volume cavity (312) arranged independently, when the oil needle (41) is moved to open, the fuel volume cavity (311) is in communication with the oil channel (44), and the fuel in the oil channel (44) is sprayed into the fuel volume cavity (311), when the air needle (42) is moved to open, the fuel gas volume cavity (312) is in communication with the air channel (45), and the fuel gas in the air channel (45) is sprayed into the fuel gas volume cavity (312).

2. The flow measuring device of claim 1, wherein, The oil needle lift adjusting member (21) and the air needle lift adjusting member (22) are both rod-shaped structures, the air needle lift adjusting member (22) is arranged outside the oil needle lift adjusting member (21), and the air needle lift adjusting member (22) and the oil needle lift adjusting member (21) can slide relative to each other, and the air needle lift adjusting member (22) and the clamping body (11) can slide relative to each other.

3. The flow measuring device of claim 2, wherein, The inner wall of the air needle lift adjusting member (22) and the outer wall of the oil needle lift adjusting member (21) are in threaded connection; The outer wall of the air needle lift adjusting member (22) and the clamping body (11) are in threaded connection.

4. The flow measuring device of claim 1, wherein, The displacement adjusting assembly (2) further comprises an oil needle displacement detection member (23) arranged on the oil needle lift adjusting member (21) and an air needle displacement detection member (24) arranged on the air needle lift adjusting member (22).

5. The flow measuring device of claim 2, wherein, The displacement adjusting assembly (2) further comprises: A first oil return mechanism (25) includes a first oil return cavity (251) and a first oil return channel (252) in communication, the first oil return cavity (251) is arranged between the outer wall of the oil needle lift adjuster (21) and the inner wall of the air needle lift adjuster (22), and the first oil return channel (252) penetrates the air needle lift adjuster (22) and the clamp body (11); A second oil return mechanism (26) includes a second oil return cavity (261) and a second oil return channel (262) in communication, the second oil return cavity (261) is arranged between the outer wall of the air needle lift adjuster (22) and the inner wall of the clamp body (11), and the second oil return channel (262) penetrates the air needle lift adjuster (22), and the second oil return channel (262) communicates the second oil return cavity (261) with the first oil return cavity (251).

6. The flow measuring device of claim 1, wherein, The double fuel nozzle (4) is provided with a plurality of fuel injection holes (47) and gas injection holes (48), the fuel injection holes (47) are outlets of the oil path (44), the gas injection holes (48) are outlets of the gas path (45), a plurality of the gas injection holes (48) are arranged in the circumferential direction of the fuel injection hole (47), the fuel volume cavity (311) is in communication with a plurality of the fuel injection holes (47), the gas volume cavity (312) is arranged in the outer circumferential direction of the fuel volume cavity (311), and the gas volume cavity (312) is in communication with a plurality of the gas injection holes (48).

7. The flow measuring device of claim 1, wherein, The detection assembly (3) further includes a fuel flowmeter (32) and a gas flowmeter (33), the fuel flowmeter (32) is arranged at the outlet position of the fuel volume cavity (311), and the gas flowmeter (33) is arranged at the outlet position of the gas volume cavity (312).

8. The flow measuring device of claim 1, wherein, The clamp assembly (1) further includes a sealing oil channel (14) and a sealing oil cavity (15) in communication, the sealing oil cavity (15) is arranged between the outer wall of the air needle (42) and the inner wall of the needle valve body (43) of the double fuel nozzle (4), and the sealing oil channel (14) penetrates the clamp body (11) and the needle valve body (43).

9. The flow measuring device of claim 1, wherein, The clamp assembly (1) further includes a fastening cap (16), the ends of the clamp body (11) and the double fuel nozzle (4) abut each other, and the fastening cap (16) is detachably connected to the outer circumferential direction of the connection position of the clamp body (11) and the double fuel nozzle (4).

10. A flow measurement method characterized by, The flow measurement device according to any one of claims 1-9, the flow measurement method comprising: Resetting the oil needle (41) and the air needle (42) to zero position; Passing fuel into the oil inlet channel (12) and the oil path (44), keeping the position of the air needle lift adjuster (22) unchanged, adjusting the oil needle lift adjuster (21) to the lift position to be detected, and testing the fuel injection flow of the double fuel nozzle (4) corresponding to the oil needle (41) at the lift position to be detected; or The gas is introduced into the gas inlet channel (13) and the gas path (45), the gas needle lift adjusting member (22) drives the oil needle lift adjusting member (21) to the lift position to be detected, and the gas injection flow of the double fuel nozzle (4) corresponding to the lift position to be detected is tested.

11. The flow measuring method of claim 10, wherein, Before the gas is introduced into the gas inlet channel (13) and the gas path (45), the method further comprises: The fuel is introduced into the fuel inlet channel (12) and the fuel path (44), and the sealing oil is introduced into the sealing oil cavity (15).

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