A device and method for detecting the atomization performance of a large-flow fuel nozzle

Abstract

The present invention discloses a device and method for detecting the atomization performance of a large-flow fuel nozzle, which is used for detecting the atomization particle size of a large-flow fuel nozzle. The detection device includes: an atomization particle size detection chamber having a detection chamber; a laser particle analyzer arranged at both ends of the detection chamber; an atomization particle size test fixture having a double-layer oil tank assembly and a baffle, which is arranged above the interior of the detection chamber; the baffle of the test fixture is arranged on the center dividing line of the nozzle. The detection method includes: the fuel nozzle sprays fuel into the detection chamber, and the double-layer oil tank assembly below the fuel receives half of the sprayed fuel particles and guides them to the non-detection area in the baffle. The channel between the baffles is the fuel nozzle atomization particle size detection area, and the laser particle analyzer emits a laser signal through the fuel particles through the channel between the baffles to perform atomization particle size detection. This method can effectively improve the accuracy of atomization particle size testing under dense spray conditions.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a device and method for detecting the atomization performance of a large-flow fuel nozzle. Background Art

[0002] Fuel nozzles are widely used in aircraft engines and gas turbines. Their function is to atomize (or vaporize) the fuel, accelerate mixture formation, ensure stable combustion, and improve combustion efficiency. The quality of a fuel nozzle's atomization performance significantly impacts the subsequent combustion of the liquid fuel in the combustion chamber. Atomized particle size is a key evaluation indicator of fuel nozzle atomization performance. Certain operating conditions require a high flow rate of liquid spray, such as large industrial fuel burners that can output over 3,000 kg / h and produce a dense mist. For such large-scale equipment, nozzles generally utilize multiple nozzle holes and a medium atomization method to disperse the medium into the finest droplets possible. Factors influencing medium atomization include nozzle structure, flow rate, and medium viscosity. To ensure optimal performance, the atomized particle size typically ranges from a few microns to several hundred microns.

[0003] In engineering applications, atomized particle size is typically measured using instruments based on the principles of interference of reflected and refracted light or diffraction and scattered light. Most existing methods employ laser particle analyzers to measure the atomized particle size of fuel nozzles. Under certain operating conditions or when using a single fuel nozzle in certain gas turbines, the oil mist is dense, preventing the laser emitted by the testing equipment from penetrating the mist and causing the fuel atomized particle size test to fail.

[0004] Patent application publication number CN111879670A discloses an atomization performance testing system and method. This system utilizes a nozzle that sprays horizontally, with a mist baffle blocking the majority of the oil mist. The system then measures the atomization performance of the fuel nozzle by detecting a small portion of the oil mist. However, this patent only measures the atomization performance of the fuel nozzle by allowing a small portion of the oil mist to enter the testing chamber. However, this small amount of oil mist is difficult to measure in terms of the overall atomization performance of the fuel nozzle, which can lead to significant distortion in the atomization performance test results. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a device and method for detecting the atomization performance of a large-flow fuel nozzle, which can effectively detect the atomization performance of a large-flow fuel nozzle.

[0006] In one aspect of the present invention, a device for detecting the atomization performance of a large-flow fuel nozzle is provided, comprising:

[0007] Atomization particle size testing room, laser particle analyzer and atomization test tooling;

[0008] The atomized particle size detection chamber comprises a detection chamber, an exhaust device, and an oil return pipe. The detection chamber is a vertically placed hollow chamber with a mounting hole on the top and transparent windows on both sides of the detection chamber. The bottom of the detection chamber is provided with an exhaust device and an oil return pipe.

[0009] The laser particle analyzer comprises a laser emitter, a laser receiver and a computer. The laser emitter is installed on one side of the detection chamber and faces the transparent window, and the laser receiver is installed next to the transparent window on the other side of the detection chamber.

[0010] The atomization test fixture comprises a nozzle mounting seat, a mounting plate, a double-layer oil tank assembly, and a baffle; the atomization test fixture is mounted on the top of the detection chamber through the mounting plate, and the channel between the baffles on both sides is aligned with the laser emitter; the upper end of the nozzle mounting seat is connected to the fuel nozzle using a connecting structure 1, and the lower end is fixed to the upper end surface of the center seat hole of the mounting plate using a connecting structure 2; the double-layer oil tank assembly is fixed to the lower end surface of the center seat hole of the mounting plate through a connecting structure 3; the baffle is fixed together with the double-layer oil tank assembly so that its upper end surface is in contact with the lower end surface of the mounting plate; the double-layer oil tank assembly includes an upper oil tank, a lower oil tank and an oil pipe, one side of the upper oil tank is an inclined surface with a knife edge, and the other side is a vertical surface with a vertical mounting edge; the installation position of the oil tank assembly is adjustable so that the knife edge on its side is aligned with the symmetrical center of the fuel nozzle nozzle.

[0011] Furthermore, the nozzle mounting seat is a cylindrical structure with a disc-shaped structure at the upper end, and its inner hole is clearance-fitted with the outer cylindrical surface of the fuel nozzle; the mounting edge at the lower end is provided with a boss, and its outer cylindrical surface is clearance-fitted with the inner diameter of the center seat hole of the mounting disk.

[0012] Furthermore, the mounting plate is disc-shaped and is clamped in the mounting hole on the top of the inspection chamber through the upper portion of the mounting edge. Two handles are also symmetrically installed on the upper portion of the mounting edge; a center seat hole is provided in the center of the bottom plane; and multiple ventilation holes are evenly distributed along the circumference of the outer periphery of the center seat hole.

[0013] Furthermore, the upper oil tank is a semi-closed long oil tank.

[0014] Furthermore, the other side of the upper oil tank is a vertical surface with a vertical mounting edge. The mounting edge is equipped with two U-shaped grooves for adjusting the installation position of the double-layer oil tank assembly. The bottom of the upper oil tank has two sets of through holes, one at each end, into which two oil pipes are inserted and welded. Several oil holes in the middle connect to the lower oil tank.

[0015] Furthermore, the lower oil trough is a semi-I-shaped trough structure, the inner width of the trough is slightly wider than the upper oil trough, and is sleeved under the upper oil trough, with one side surface being welded and fixed to the vertical surface of the upper oil trough with the mounting edge.

[0016] Furthermore, the baffle is composed of two arc-shaped columnar thin plates, which are fixed together by welding four rectangular thin plates and two oil pipes of the double-layer oil tank assembly.

[0017] Furthermore, the side surface of the double-layer oil tank assembly is knife-edge-shaped, and the knife-edge maintains a sharp edge; the side surface of the double-layer oil tank assembly forms an angle of 45° with the end surface of the fuel nozzle.

[0018] Furthermore, an exhaust device is installed at the lower part of the detection chamber to promptly extract the mist generated after the fuel nozzle is sprayed out of the detection chamber.

[0019] In another aspect of the present invention, a method for testing the atomization performance of a high-flow fuel nozzle is provided, comprising the following steps: assembling the testing device, adjusting the installation position of the double-layer oil tank assembly so that the side edge is aligned with the symmetrical center of the fuel nozzle nozzle; starting the fuel nozzle to spray fuel particles; the double-layer oil tank assembly installed below the nozzle of the high-flow fuel nozzle receives half of the fuel particles sprayed by the fuel nozzle and guides them to a non-test area within the baffles on both sides, and the remaining half of the fuel particles enter the fuel nozzle atomization particle size detection area formed by the channel between the baffles on both sides; and performing atomization particle size detection on the fuel nozzle atomization particle size detection area using a particle analyzer.

[0020] The present invention has the following advantages:

[0021] 1. After adding the atomization particle size test fixture, the oil mist is evenly divided into two parts from the nozzle through the double-layer oil tank assembly, which can ensure the consistency and proportional relationship between the measured oil mist and the actual oil mist, and greatly reduce the concentration of the detected oil mist, which is conducive to the laser of the laser particle analyzer to effectively penetrate the oil mist for detection, effectively ensuring the accuracy of the test data and preventing distortion.

[0022] 2. Fuel particles sprayed from a fuel nozzle are generally evenly distributed in a conical shape. Using a double-layer oil tank assembly to block half of the fuel particles and measuring the atomized particle size of the remaining half of the fuel particles can also represent the atomization performance of the entire fuel nozzle.

[0023] 3. During testing, the exhaust device can promptly extract the mist from the testing chamber, effectively preventing the mist from affecting the atomization particle size detection of the fuel nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a fuel nozzle atomization particle size detection device.

[0025] Figure 2 It is a schematic diagram of the decomposition of the atomization particle size test tooling.

[0026] Figure 3 This is a schematic diagram of the double-layer oil tank assembly.

[0027] Figure 4 It is the main cross-sectional view of the atomization particle size test fixture.

[0028] Figure 5 It is the right sectional view of the atomization particle size test fixture.

[0029] Figure 6 This is a bottom view of the atomization particle size test tooling.

[0030] Figure 7 It is a cross-sectional view of the double-layer oil tank assembly.

[0031] In the figure: 10 detection chamber, 11 exhaust device, 12 oil return pipe; 20 laser transmitter, 21 laser receiver, 22 computer; 30 nozzle mounting seat, 31 screw one, 32 screw two; 40 mounting plate, 41 handle, 42 screw three; 50 double-layer oil tank assembly, 51 upper oil tank, 52 lower oil tank, 53 oil pipe; 60 baffle, 61 fixing plate; 70 fuel nozzle, 71 oil inlet pipe, 72 compressed air pipe, A is the vent hole; the fitting clearance between B and C is H8 / g7; the clearance of D is 1~3mm; E is the detection area; F is the mark on the mounting plate; G is the knife edge. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to examples and drawings.

[0033] Example 1

[0034] like Figure 1 In this embodiment, the fuel nozzle atomization particle size detection device primarily comprises: an atomization particle size detection chamber, a laser particle analyzer, and an atomization particle size test fixture. The atomization particle size detection chamber comprises a detection chamber 10, an exhaust device 11, and an oil return pipe 12; the laser particle analyzer comprises a laser emitter 20, a laser receiver 21, and a computer 22; and the atomization test fixture comprises a nozzle mounting base 30, a mounting plate 40, a double-layer oil tank assembly 50, and a baffle 60. The atomization test fixture is mounted above the detection chamber 10, with the laser emitter 20 and laser receiver 21 mounted on either side of the detection chamber 10. The computer 22 is connected to the laser receiver 21.

[0035] like Figure 2 、 Figure 3 、 Figure 7 In this embodiment, the atomization particle size test fixture's structural screw 1 31 secures the fuel nozzle to the nozzle mounting base 30, which is then connected to the mounting plate 40 via screw 2 32. The baffle 60 is welded to the oil pipe 53 on the double-layer oil tank assembly 50 via four fixing plates 61. The passage between the two baffles 60 is perpendicular to the blade edge G of the double-layer oil tank assembly 50.

[0036] like Figure 2 、 Figure 5, screw three 42 will double oil tank assembly 50 is installed on the lower end surface of the mounting plate 40, as shown Figure 7 The distance between the knife edge G of the double-layer oil tank assembly 50 and the fuel nozzle is 1 to 3 mm. Figure 6 , the two engraved lines F on the lower end surface of the mounting plate 40 are aligned. Figure 2 、 Figure 6 The bottom surface of the mounting plate 40 is evenly provided with a plurality of vent holes A along the circumference.

[0037] like Figure 1 、 Figure 3 、 Figure 7 The upper oil tank 51 is a semi-enclosed, elongated oil tank. One side features an inclined surface with a sharpened blade G; the other side features a vertical surface with a vertical mounting edge. The mounting edge has two U-shaped grooves for securing the double-layer oil tank assembly 50 to the lower end surface of the center seat hole of the mounting plate 40. The mounting position of the double-layer oil tank assembly 50 can be adjusted as needed. The bottom of the upper oil tank 51 has two sets of through holes, one at each end, into which two oil pipes 53 are inserted and welded. Several oil holes in the center connect to the lower oil tank 52. The lower oil tank 52 is a semi-I-shaped groove structure, slightly wider than the upper oil tank 51. It fits underneath the upper oil tank 51, with one side welded to the vertical surface with the mounting edge of the upper oil tank 51. Fuel flowing from the center hole at the bottom of the upper oil tank 51 flows into the inspection chamber 10 through the ends of the semi-I-shaped groove of the lower oil tank 52.

[0038] like Figure 1 、 Figure 4 In this embodiment, the head of the fuel nozzle 70 is equipped with an oil inlet pipe 71 and a compressed air pipe 72. Its mounting edge is connected to the upper end of the nozzle mounting base 30 with a small gap H8 / g7 to ensure the nozzle head of the fuel nozzle 70 is coaxial with the nozzle mounting base 30. The lower end of the nozzle mounting base 30 is connected to the center seat hole of the mounting plate 40 with a small gap H8 / g7 to ensure the nozzle head of the fuel nozzle 70 is coaxial with the center seat hole of the mounting plate 40. The double-layer oil tank assembly 50 and the baffle 60 are mounted on the lower end surface of the mounting plate 40. The upper mounting edge of the mounting plate 40 is clamped to the top of the inspection chamber 10.

[0039] Example 2

[0040] like Figure 2 , Figure 4 As shown, the implementation of Example 2 is generally consistent with that of Example 1. The difference lies in the addition of a handle 41. Two handles 41 are symmetrically mounted on the mounting edge of the mounting plate, making it easier and faster to adjust the channel (detection area E) between the two side baffles 60 so that it is aligned with the laser particle analyzer.

[0041] Example 3

[0042] Based on the various embodiments of the atomization performance testing device described above, this embodiment also provides corresponding testing method embodiments. The high-flow fuel nozzle atomization performance testing method primarily involves installing the fuel nozzle 70 on an atomization particle size test fixture. Adjusting the blade edge of the double-layered oil tank assembly 50 to align with the symmetrical center of the fuel nozzle orifice, such that the double-layered oil tank assembly 50 covers half of the fuel nozzle orifice and the blade edge is perpendicular to the channel between the two side baffles. The atomization particle size test fixture and the fuel nozzle are then installed on top of the test chamber 10, with the channel between the two side baffles 60 aligned with the laser particle analyzer.

[0043] When the fuel nozzle 70 is connected to the fuel and atomizing compressed air, the switch is turned on, and the fuel will be converted into atomized fuel particles and enter the device. At the same time, the exhaust device 11 at the bottom of the detection chamber 10 is activated to promptly remove the mist. At this time, half of the fuel particles sprayed by the fuel nozzle 70 enter the detection area, and the other half of the fuel particles are guided to the non-detection area within the baffles on both sides through the double-layer oil tank assembly 50. The laser particle analyzer analyzes the half of the fuel particles that enter the detection area, and the atomized particle size results of the high-flow fuel nozzle can be detected.

[0044] Thus far, various embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details well known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0045] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A device for detecting the atomization performance of a large-flow fuel nozzle, characterized in that: include: Atomization particle size testing room, laser particle analyzer and atomization test tooling; The atomized particle size detection chamber comprises a detection chamber (10), an exhaust device (11), and an oil return pipe (12); the detection chamber (10) is a vertically placed hollow chamber; a mounting hole is provided at the top of the detection chamber (10); transparent windows are provided on both sides of the detection chamber (10); and an exhaust device (11) and an oil return pipe (12) are provided at the bottom of the detection chamber (10); The laser particle analyzer comprises a laser emitter (20), a laser receiver (21), and a computer (22); the laser emitter (20) is installed on one side of the detection chamber and faces the transparent window, and the laser receiver (21) is installed on the other side of the detection chamber next to the transparent window; The atomization test fixture comprises a nozzle mounting seat (30), a mounting plate (40), a double-layer oil tank assembly (50), and a baffle (60); the atomization test fixture is mounted on the top of the detection chamber (10) via the mounting plate (40), and the channel between the baffles (60) on both sides is aligned with the laser emitter (20); the upper end of the nozzle mounting seat (30) is connected to the fuel nozzle using a connecting structure 1, and the lower end is fixed to the upper end surface of the center seat hole of the mounting plate (40) using a connecting structure 2; the double-layer oil tank assembly (50) is fixed to the upper end surface of the center seat hole of the mounting plate (40) via a connecting structure 3. The baffle (60) is fixed to the lower end surface of the central seat hole of the mounting plate (40); the baffle (60) is fixed to the double-layer oil tank assembly (50) so that its upper end surface is in contact with the lower end surface of the mounting plate (40); the double-layer oil tank assembly (50) includes an upper oil tank (51), a lower oil tank (52) and an oil pipe (53); one side of the upper oil tank (51) is an inclined surface with a knife edge, and the other side is a vertical surface with a vertical mounting edge; the mounting position of the oil tank assembly (50) is adjustable so that the knife edge on its side is aligned with the symmetrical center of the nozzle of the fuel nozzle (70); The mounting plate (40) is disc-shaped and is mounted on the mounting hole at the top of the detection chamber through the upper portion of the mounting edge. Two handles (41) are also symmetrically mounted on the upper portion of the mounting edge. A central seat hole is provided in the center of the bottom plane. A plurality of vent holes are evenly distributed along the circumference of the outer periphery of the central seat hole. The baffle (60) is composed of two arc-shaped columnar thin plates, which are welded and fixed together with two oil pipes (53) of the double-layer oil tank assembly (50) through four rectangular thin plates; The side surface of the double-layer oil tank component (50) is knife-edge shaped, and the knife edge maintains a sharp edge; the side surface of the double-layer oil tank component (50) forms an angle of 45 degrees with the end surface of the fuel nozzle (70).

2. The atomization performance detection device for a large flow fuel nozzle according to claim 1, characterized in that: The nozzle mounting seat (30) is a cylindrical structure, the upper end of which is a disc-shaped structure, and the inner hole thereof is clearance-matched with the outer cylindrical surface of the fuel nozzle (70); the mounting edge of the lower end is provided with a boss, and the outer cylindrical surface of the boss is clearance-matched with the inner diameter of the center seat hole of the mounting plate (40).

3. The atomization performance detection device for a large flow fuel nozzle according to claim 1, characterized in that: The upper oil tank (51) is a semi-enclosed long oil tank.

4. The atomization performance detection device for a large flow fuel nozzle according to claim 1, characterized in that: The other side of the upper oil tank (51) is a vertical surface with a vertical mounting edge. The mounting edge is provided with two U-shaped grooves for adjusting the mounting position of the double-layer oil tank assembly. The bottom of the upper oil tank (51) is provided with two groups of through holes, wherein each end has an oil hole, and two oil pipes are respectively inserted into the oil holes and welded and fixed; and several oil holes in the middle are connected to the lower oil tank.

5. The atomization performance detection device for a large flow fuel nozzle according to claim 1, characterized in that: The lower oil groove (52) is a semi-I-shaped groove structure, with a groove width wider than the upper oil groove (51), and is sleeved below the upper oil groove (51), with one side surface being welded and fixed to the vertical surface of the upper oil groove (51) with a mounting edge.

6. The atomization performance detection device for a large flow fuel nozzle according to claim 1, characterized in that: The lower part of the detection chamber (10) is equipped with an exhaust device (11) to timely extract the mist generated after the fuel nozzle (70) sprays out of the detection chamber (10).

7. A method for detecting the atomization performance of a large flow fuel nozzle based on the device for detecting the atomization performance of a large flow fuel nozzle according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: assembling the detection device, adjusting the installation position of the double-layer oil tank assembly (50) so that the blade on the side thereof is aligned with the symmetrical center of the nozzle of the fuel nozzle (70); starting the fuel nozzle (70) so that the nozzle sprays fuel particles; A double-layer oil tank assembly (50) installed below the nozzle of a large-flow fuel nozzle (70) receives half of the fuel particles sprayed by the fuel nozzle (70) and guides them to a non-detection area within the baffles (60) on both sides, while the remaining half of the fuel particles enter a fuel nozzle atomization particle size detection area formed by a channel between the baffles (60) on both sides; and a particle analyzer is used to perform atomization particle size detection on the fuel nozzle atomization particle size detection area.

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