Fuel nozzle air flow measuring device
By designing a fuel nozzle air flow measurement device including a pressure cylinder and a standard orifice plate, the problem of large air flow measurement error in the prior art is solved, and a higher measurement accuracy and a more compact structure are achieved.
Patent Information
- Application Number
- CN202421386324.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-17
AI Technical Summary
When measuring the air flow of fuel nozzles, the prior art has large errors and low data reliability, which affects the design and processing quality of the combustion chamber.
A fuel nozzle air flow measurement device is designed, including a pressure cylinder and a standard orifice plate. The pressure in the pressure cylinder is measured by a pressure sensor, and combined with the air outlet size of the standard orifice plate, the air flow is accurately measured.
It improves the accuracy of air flow measurement, the overall structure is compact, easy to assembly, reduces measurement errors, and improves the combustion chamber design and processing quality.
Smart Images
Figure CN222800330U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a fuel nozzle air flow measurement device. Background Art
[0002] The fuel nozzle is a key component of the combustion chamber and a key structure for organizing combustion. The fuel nozzle sprays fuel into the combustion chamber, and air enters the combustion chamber through structures such as the vortex finder on the fuel nozzle. The air includes auxiliary atomization air, nozzle residual oil purge air, combustion air, and local structure cooling air.
[0003] The flow rate of auxiliary atomizing air affects the atomization performance of the fuel nozzle, and thus affects the ignition and flameout performance of the combustion chamber; the nozzle residual oil purge air blows away the fuel remaining at the nozzle and inside the fuel nozzle after the fuel supply is stopped, to prevent fuel stagnation and coking or carbon deposition; the participating combustion air affects the flow field and temperature field of the main combustion zone, and thus affects the combustion efficiency, outlet temperature distribution and pollutant generation; the local structure cooling air affects the cooling effect, and thus affects the service life and safety of the hot end structure of the combustion chamber.
[0004] During the design and processing of the combustion chamber, the air flow of the fuel nozzle needs to be measured to detect whether the design is correct or whether the processed hardware meets the design requirements. After the combustion chamber is tested or used, the air flow of the fuel nozzle needs to be re-measured to confirm whether the fuel nozzle can continue to be used.
[0005] Since the air flow in each part of the fuel nozzle is relatively small, the measurement error is large and the data reliability is low, it will affect the design and processing quality of the combustion chamber. Utility Model Content
[0006] In view of the above problems in the prior art, the utility model proposes a fuel nozzle air flow measurement device, which has a compact structure and can effectively improve the measurement accuracy.
[0007] Specifically, the utility model proposes a fuel nozzle air flow measurement device, comprising:
[0008] The pressure cylinder is in a hollow cylindrical shape, and a first mounting seat and a second mounting seat communicating with the interior of the pressure cylinder are provided on the outer wall of the pressure cylinder, the first mounting seat is used to install a pressure sensor, and the second mounting seat is used to install a fuel nozzle, the pressure sensor is used to measure the pressure in the pressure cylinder, and the fuel nozzle is communicated with the interior of the pressure cylinder through the second mounting seat;
[0009] A standard orifice plate is arranged at one end of the pressure cylinder, and an air outlet hole is opened at the center of the standard orifice plate.
[0010] According to an embodiment of the utility model, a first flange is provided at the other end of the pressure cylinder, and the pressure cylinder is connected to the air intake pipeline of the fuel nozzle through the first flange.
[0011] According to an embodiment of the utility model, a second flange is provided at one end of the pressure cylinder, and the standard orifice plate is fixed to the pressure cylinder through the second flange.
[0012] According to an embodiment of the present utility model, the first flange and the second flange are respectively connected and fixed to the air intake pipeline and the standard orifice plate by bolts.
[0013] According to an embodiment of the utility model, the fuel nozzle air flow measurement device also includes a gasket, which is arranged between the first flange and the intake pipe, and between the second flange and the standard orifice plate, and the gasket is used to improve the sealing performance.
[0014] According to an embodiment of the utility model, a plurality of first mounting seats are provided on the outer wall of the pressure cylinder.
[0015] According to one embodiment of the present utility model, the first mounting seat is arranged between the other end of the pressure cylinder and the second mounting seat.
[0016] According to an embodiment of the present invention, the air outlet hole is a straight hole.
[0017] According to an embodiment of the present invention, the air outlet is outwardly expanded.
[0018] According to an embodiment of the utility model, different standard orifice plates are selected according to the air intake flow rate of the fuel nozzle, and different standard orifice plates have air outlet holes of different sizes.
[0019] The utility model provides a fuel nozzle air flow measurement device, in which a standard orifice plate is arranged at one end of a pressure cylinder, and the air flow can be measured accurately. The overall structure is compact and easy to assemble.
[0020] It should be understood that the above general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The accompanying drawings are included to provide a further understanding of the present invention, and they are included and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with this specification serve to explain the principles of the present invention. In the accompanying drawings:
[0022] Figure 1 The schematic diagram of the structure of a fuel nozzle air flow measurement device according to an embodiment of the utility model is shown.
[0023] Figure 2 A cross-sectional view of a fuel nozzle air flow measurement device according to an embodiment of the utility model is shown.
[0024] The above drawings include the following reference numerals:
[0025] Air flow measurement device 100
[0026] Pressure cylinder 101
[0027] Standard orifice plate 102
[0028] First mounting seat 103
[0029] Second mounting seat 104
[0030] Vent 105
[0031] First flange 106
[0032] Second flange 107 DETAILED DESCRIPTION
[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.
[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually merely illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0037] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.
[0039] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.
[0040] Figure 1 The schematic diagram of the structure of a fuel nozzle air flow measurement device according to an embodiment of the utility model is shown. Figure 2 The cross-sectional view of a fuel nozzle air flow measurement device according to an embodiment of the present invention is shown. As shown in the figure, a fuel nozzle air flow measurement device 100 mainly includes a pressure cylinder 101 and a standard orifice plate 102 .
[0041] The pressure cylinder 101 is in a hollow cylindrical shape. A first mounting seat 103 and a second mounting seat 104 are provided on the outer wall of the pressure cylinder 101 and are connected to the inside of the pressure cylinder 101. The first mounting seat 103 is used to mount a pressure sensor, and the pressure sensor measures the pressure inside the pressure cylinder 101 through the first mounting seat 103. The fuel nozzle is connected to the inside of the pressure cylinder 101 through the second mounting seat 104, and the gas entering the pressure cylinder 101 enters the fuel nozzle through the second mounting seat 104.
[0042] The standard orifice plate 102 is disposed at one end of the pressure cylinder 101. An air outlet hole 105 is provided at the center of the standard orifice plate 102.
[0043] The other end of the pressure cylinder 101 is the air inlet side of the pressure cylinder 101, into which the measuring air is introduced, and the standard orifice plate 102 is the exhaust side of the pressure cylinder 101. The air in the pressure cylinder 101 enters the atmosphere through the air outlet 105 of the standard orifice plate 102. The interior of the pressure cylinder 101 is connected to the fuel nozzle through the second mounting seat 104 to provide air to the fuel nozzle. The pressure sensor can measure the pressure inside the pressure cylinder 101, that is, the air inlet pressure of the fuel nozzle, that is, the upstream static pressure of the fuel nozzle. The pressure value can be directly read through the pressure sensor.
[0044] Preferably, the other end of the pressure cylinder 101 is provided with a first flange 106. The pressure cylinder 101 is communicated with the air intake pipeline of the fuel nozzle through the first flange 106.
[0045] Preferably, a second flange 107 is provided at one end of the pressure cylinder 101 . The standard orifice plate 102 is fixed to the pressure cylinder 101 via the second flange 107 .
[0046] Preferably, the first flange 106 and the second flange 107 are respectively connected and fixed to the air intake pipeline and the standard orifice plate 102 by bolts.
[0047] Preferably, the fuel nozzle air flow measurement device 100 further includes a gasket (not shown). The gasket is arranged between the first flange 106 and the air intake pipe, and between the second flange 107 and the standard orifice plate 102. The gasket is used to improve the sealing performance between the two connecting parts.
[0048] Preferably, a plurality of first mounting seats 103 are provided on the outer wall of the pressure cylinder 101 for mounting a plurality of pressure sensors. More preferably, the first mounting seat 103 is arranged between the other end of the pressure cylinder 101 and the second mounting seat 104. From the air inlet and outlet direction of the pressure cylinder 101, the pressure sensor is arranged upstream of the fuel nozzle to improve the measurement accuracy of the pressure sensor.
[0049] Preferably, the air outlet holes 105 of the standard orifice plate 102 are straight holes.
[0050] Optionally, the air outlet holes 105 of the standard orifice plate 102 are outwardly expanded.
[0051] Preferably, different standard orifice plates 102 are selected according to the size of the intake flow rate of the fuel nozzle. Different standard orifice plates 102 have outlet holes 105 of different sizes. Specifically, the standard orifice plate 102 has a series of specifications, and the specification parameter is the aperture of the outlet hole 105. For the intake structure with a small intake flow rate of the fuel nozzle, a standard orifice plate 102 with a small aperture of the outlet hole 105, that is, a small flow area, is selected to increase the pressure difference and reduce the measurement inaccuracy caused by the low incoming air flow rate and pressure; for the intake structure with a large air flow rate, a standard orifice plate 102 with a large aperture of the outlet hole 105, that is, a large flow area, is selected to reduce the demand for the air supply pressure of the air source.
[0052] When testing the air flow rate of the fuel nozzle, select a standard orifice plate 102 of corresponding specifications according to the intake air flow rate of the fuel nozzle. Fix the standard orifice plate 102 to one end of the pressure cylinder 101 through the second flange 107. Assemble the pressure sensor and the fuel nozzle to the first mounting seat 103 and the second mounting seat 104. Connect the intake pipeline to the other end of the pressure cylinder 101 through the first flange 106.
[0053] After the fuel nozzle air flow measurement device 100 is installed, the air supply device is started to supply air to the air flow measurement device 100, and the air tightness of the air flow measurement device 100 is tested. After confirming that the air flow measurement device 100 is leak-free, the flow measurement test can be officially started.
[0054] Generally, after air supply, the air flow and pressure difference measurement data are observed, and the air flow and pressure difference are recorded after the data is stable, so as to calculate the air flow area of the intake structure on the fuel nozzle. Selecting the standard orifice plate 102 of corresponding specifications according to the design flow of the intake structure to be measured can effectively improve the measurement accuracy and reduce the demand for the air supply pressure of the air source. As mentioned above, for an intake structure with a small air flow, a standard orifice plate 102 with a small flow area is selected to increase the pressure difference and reduce the measurement inaccuracy caused by the low incoming air flow and pressure; for a structure with a large air flow, a standard orifice plate 102 with a large flow area is selected to reduce the demand for the air supply pressure of the air source.
[0055] When the air flow measurement device 100 provided by the utility model is used to carry out large-scale air flow measurement, the flow area can be quickly judged by the indication of the pressure sensor to see whether it meets the requirements, thereby greatly improving the measurement efficiency. The air flow measurement device 100 has a compact structure and is easy to carry, and can meet the requirement of using the same device when the fuel nozzle carries out multiple air flow measurements. The same measurement device can be used when the fuel nozzle is shipped after processing and when it is retested after the test is completed, eliminating the error introduced by the difference of the air flow measurement device 100.
[0056] The utility model provides a fuel nozzle air flow measurement device, which has the following advantages:
[0057] 1. Select standard orifice plates of different specifications according to the designed intake flow rate of the fuel nozzle and increase the air pressure flowing through the pressure cylinder. This can improve the measured values of air flow and pressure and avoid inaccurate measurements caused by too low flow and pressure.
[0058] 2. When measuring in large quantities, with a fixed air flow rate, it is only necessary to quickly determine whether the flow area of the intake structure of the fuel nozzle meets the requirements based on the indication of the pressure sensor, without having to measure the air flow rate under multiple pressure differences and then calculate the flow area, thereby improving the measurement efficiency.
[0059] 3. The air flow measurement device has a simple overall structure and small size, is easy to process and carry, and can be used for multiple measurements of the fuel nozzle using the same device, eliminating the measurement error introduced by the test equipment.
[0060] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.
Claims
1. A fuel nozzle air flow measurement device, characterized in that: include: The pressure cylinder is in a hollow cylindrical shape, and a first mounting seat and a second mounting seat communicating with the interior of the pressure cylinder are provided on the outer wall of the pressure cylinder, the first mounting seat is used to install a pressure sensor, and the second mounting seat is used to install a fuel nozzle, the pressure sensor is used to measure the pressure in the pressure cylinder, and the fuel nozzle is communicated with the interior of the pressure cylinder through the second mounting seat; A standard orifice plate is arranged at one end of the pressure cylinder, and an air outlet hole is opened at the center of the standard orifice plate.
2. The fuel nozzle air flow measurement device according to claim 1, characterized in that: A first flange is disposed at the other end of the pressure cylinder, and the pressure cylinder is communicated with the air intake pipeline of the fuel nozzle through the first flange.
3. The fuel nozzle air flow measurement device according to claim 2, characterized in that: A second flange is provided at one end of the pressure cylinder, and the standard orifice plate is fixed to the pressure cylinder via the second flange.
4. The fuel nozzle air flow measurement device according to claim 3, characterized in that: The first flange and the second flange are respectively connected and fixed to the air intake pipeline and the standard orifice plate by bolts.
5. The fuel nozzle air flow measurement device according to claim 4, characterized in that: It also includes a gasket, which is arranged between the first flange and the air intake pipeline, and between the second flange and the standard orifice plate, and the gasket is used to improve the sealing performance.
6. The fuel nozzle air flow measurement device according to claim 1, characterized in that: A plurality of first mounting seats are arranged on the outer wall of the pressure cylinder.
7. The fuel nozzle air flow measurement device according to claim 1, characterized in that: The first mounting seat is arranged between the other end of the pressure cylinder and the second mounting seat.
8. The fuel nozzle air flow measurement device according to claim 1, characterized in that: The air outlet hole is a straight hole.
9. The fuel nozzle air flow measurement device according to claim 1, characterized in that: The air outlet is outwardly expanded.
10. The fuel nozzle air flow measurement device according to claim 1, characterized in that: Different standard orifice plates are selected according to the air intake flow rate of the fuel nozzle, and different standard orifice plates have air outlet holes of different sizes.