Device and method for detecting atomization performance of high-flow fuel nozzle

Abstract

The invention discloses an atomization performance detection device and method for a high-flow fuel nozzle, and the device is used for the atomization particle size detection of the high-flow fuel nozzle, and the device comprises an atomization particle size detection chamber which is provided with a detection cabin; the laser particle analyzers are arranged at the two ends of the detection bin; the atomization particle size test tool is provided with a double-layer oil groove assembly and a baffle plate and is arranged at the upper part in the detection bin; and the baffle plate of the test tool is arranged on the center parting line of the nozzle. The detection method comprises the steps that the fuel nozzle sprays fuel into the detection bin, half of sprayed fuel particles are received by the double-layer oil tank assembly below the fuel and led to non-detection areas in the baffles, and a channel between the baffles is a fuel nozzle atomization particle size detection area; a laser particle analyzer emits a laser signal to penetrate through the fuel particles from a channel between the baffles for atomization particle size detection. The method can effectively improve the atomization particle size test precision under the dense spraying working condition.

Description

Technical Field

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

[0002] Fuel nozzles are widely used in aircraft engines, gas turbines, etc. Their function is to atomize (or vaporize) the fuel, accelerate the formation of the mixture, ensure stable combustion and improve combustion efficiency. The quality of the fuel nozzle atomization performance will have a great impact on the subsequent combustion effect of the liquid fuel in the combustion chamber. The atomization particle size is one of the important evaluation indicators of the fuel nozzle atomization performance. Under certain working conditions, a large flow of liquid spray is required. For example, some large industrial fuel burners can output more than 3000kg / h of oil, and the liquid mist is relatively dense. For such large equipment, the nozzle structure generally adopts a multi-spray hole and medium atomization method to disperse the medium into fine droplets as much as possible. Factors affecting the medium atomization effect include nozzle structure, flow rate, medium viscosity, etc. In order to ensure the use effect, the atomization particle size is usually required to be between a few microns and hundreds of microns.

[0003] In engineering applications, instruments based on the principle of reflection, refraction light interference or diffraction scattered light are generally used to detect the atomization particle size. Most of the existing detection methods use laser particle analyzers to detect the atomization particle size of fuel nozzles. Under certain working conditions or when some gas turbines use a single fuel nozzle, the oil mist is relatively dense, so that the laser emitted by the detection equipment cannot penetrate the oil mist, resulting in failure of the fuel atomization particle size detection.

[0004] The invention application with publication number CN111879670A discloses an atomization performance detection system and detection method, which uses a nozzle to spray horizontally and a liquid mist baffle to block most of the oil mist, and reflects the atomization performance of the fuel nozzle by detecting a small part of the oil mist. The above patent only allows a small part of the oil mist to enter the detection chamber to participate in the atomization performance detection, but the detection of a small part of the oil mist is difficult to reflect the overall atomization performance of the fuel nozzle, which is easy to cause a large distortion of the atomization performance detection result. 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 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 atomization 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, a mounting hole is provided on the top of the detection chamber, transparent windows are provided on both sides of the detection chamber, and an exhaust device and an oil return pipe are provided at the bottom of the detection chamber;

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

[0010] The atomization particle size test tool comprises a nozzle mounting seat, a mounting plate, a double-layer oil tank assembly, and a baffle; the atomization particle size test tool 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 fits 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 symmetrical to the 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-matched with the outer cylindrical surface of the fuel nozzle; a boss is provided at the mounting edge at the lower end, and its outer cylindrical surface of the boss is clearance-matched 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 detection 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] In another aspect of the present invention, a method for detecting the atomization particle size of a large-flow fuel nozzle is provided, comprising the following steps: assembling the detection tooling, adjusting the installation position of the double-layer oil tank assembly so that the blade on its side is symmetrical to the center of the nozzle of the fuel nozzle; starting the fuel nozzle so that the nozzle sprays fuel particles; the double-layer oil tank assembly installed below the nozzle of the large-flow fuel nozzle receives half of the fuel particles sprayed by the fuel nozzle and guides them to the non-detection area in the baffles on both sides, and the remaining half of the fuel particles enter the fuel nozzle atomization particle size detection area composed of 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.

[0014] Furthermore, the upper oil tank is a semi-closed long oil tank.

[0015] Furthermore, the oil tank is a vertical surface with a vertical mounting edge, and the mounting edge is provided with two U-shaped grooves for adjusting the mounting position of the double-layer oil tank assembly. Two groups of through holes are provided at the bottom of the upper oil tank, wherein each end has an oil hole, and two oil pipes are respectively inserted into the oil holes and fixed by welding; and several oil holes in the middle are connected to the lower oil tank.

[0016] Furthermore, the lower oil groove is a semi-I-shaped groove structure, the inner width of the groove is slightly wider than the upper oil groove, and is sleeved under the upper oil groove, and one side surface is welded and fixed to the vertical surface of the upper oil groove with a mounting edge.

[0017] Furthermore, the baffle is composed of two arc-shaped columnar thin plates, which are welded and fixed together with two oil pipes of the double-layer oil tank assembly through four rectangular thin plates.

[0018] Furthermore, the side surface of the double-layer oil tank component is knife-edge-shaped, and the knife-edge maintains a sharp edge; the side surface of the double-layer oil tank component forms an angle of about 45° with the end surface of the fuel nozzle.

[0019] Furthermore, an exhaust device is installed at the lower part of the detection chamber to timely extract the mist generated by the fuel nozzle after spraying out of the detection chamber.

[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 detection data and preventing distortion.

[0022] 2. The fuel particles sprayed by the fuel nozzle are generally evenly distributed in a cone shape. Using a double-layer oil tank assembly to block half of the fuel particles and detecting the atomization particle size obtained by detecting the remaining half of the fuel particles can also characterize the atomization performance of the entire fuel nozzle.

[0023] 3. During the test, the exhaust device can extract the mist out of the test chamber in time, which can effectively avoid the influence of the mist on 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 It is a schematic diagram of the decomposition of the double-layer oil tank assembly.

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

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

[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 a 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 a vent hole; the matching clearance of B and C is H8 / g7; the clearance of D is 1-3mm; E is the detection area; F is the engraved line of the mounting plate; G is the knife edge. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with examples and drawings.

[0033] Embodiment 1

[0034] like Figure 1 In this embodiment, the fuel nozzle atomization particle size detection device mainly includes: an atomization particle size detection chamber, a laser particle analyzer, and an atomization particle size test tool. Among them, the atomization particle size detection chamber has a detection chamber 10, an exhaust device 11, and an oil return pipe 12; the laser particle analyzer has a laser transmitter 20, a laser receiver 21, and a computer 22; the atomization particle size test tool has a nozzle mounting seat 30, a mounting plate 40, a double-layer oil tank assembly 50, and a baffle 60. The atomization particle size test tool is installed above the detection chamber 10, the laser transmitter 20 and the laser receiver 21 are installed on both sides of the detection chamber 10, and the computer 22 is connected to the laser receiver 21.

[0035] like Figure 2 , Figure 3 , Figure 7 In this embodiment, the structural screw 1 31 of the atomization particle size test fixture fixes the fuel nozzle on the nozzle mounting seat 30, and the nozzle mounting seat 30 is connected to the mounting plate 40 through the screw 2 32. After the baffle 60 is welded to the oil pipe 53 on the double-layer oil tank assembly 50 through four fixing plates 61, the channel between the two baffles 60 is perpendicular to the knife edge G of the double-layer oil tank assembly 50.

[0036] like Figure 2 , Figure 5, screw three 42 is used to fit the double-layer oil tank assembly 50 on the lower end surface of the mounting plate 40, as shown in FIG. 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 ventilation holes A along the circumference.

[0037] like Figure 1 , Figure 3 , Figure 7 The upper oil tank 51 is a semi-enclosed long oil tank, one side of which is an inclined surface with a knife edge G, and the knife edge G maintains a sharp edge; the other side is a vertical surface with a vertical mounting edge, and the mounting edge is provided with two U-shaped grooves, which are used to fix the double-layer oil tank assembly 50 on the lower end surface of the central seat hole of the mounting plate 40, and the installation position of the double-layer oil tank assembly 50 can be adjusted as needed. Two groups of through holes are provided at the bottom of the upper oil tank 51, wherein there is an oil hole at each end, and two oil pipes 53 are respectively inserted into the oil holes and welded and fixed; there are several oil holes in the middle that are connected to the lower oil tank 52. The lower oil tank 52 is a semi-I-shaped groove structure, which is slightly wider than the upper oil tank 51, and is sleeved under the upper oil tank 51, and one side thereof is welded and fixed to the vertical surface of the upper oil tank 51 with the mounting edge. The fuel flowing down from the middle oil hole at the bottom of the upper oil tank 51 flows into the detection chamber 10 from the two 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, and its mounting edge is connected to the upper end of the nozzle mounting seat 30 with a small gap H8 / g7 to ensure that the nozzle of the fuel nozzle 70 is coaxial with the nozzle mounting seat 30. The lower end of the nozzle mounting seat 30 is connected to the central seat hole of the mounting plate 40 with a small gap H8 / g7 to ensure that the nozzle of the fuel nozzle 70 is coaxial with the central seat hole of the mounting plate 40. The double-layer oil tank assembly 50 and the baffle 60 are installed on the lower end surface of the mounting plate 40. The upper mounting edge of the mounting plate 40 is clamped on the top of the detection chamber 10.

[0039] Embodiment 2

[0040] like Figure 2 , Figure 4 As shown, the implementation of Example 2 is substantially the same as that of Example 1. The difference is that a handle 41 is added, and two handles 41 are symmetrically installed on the mounting edge of the mounting plate, so that the channel (detection area E) between the baffles 60 on both sides can be adjusted more conveniently and quickly to align it with the laser particle analyzer.

[0041] Embodiment 3

[0042] Based on the above-mentioned embodiments of the atomization performance detection device, this embodiment also provides a corresponding detection method embodiment. The large-flow fuel nozzle atomization performance detection method mainly includes installing the fuel nozzle 70 on the atomization particle size test fixture, adjusting the blade of the double-layer oil tank assembly 50 to align with the symmetric center of the fuel nozzle nozzle, so that the double-layer oil tank assembly 50 covers half of the fuel nozzle nozzle, and the blade edge is perpendicular to the channel between the baffles on both sides; installing the atomization particle size test fixture together with the fuel nozzle on the top of the detection chamber 10, and aligning the channel between the baffles 60 on both sides with the laser particle analyzer.

[0043] When the fuel nozzle 70 is connected to the fuel and the atomizing compressed air, the switch is turned on, and the fuel will be transformed 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 started to remove the mist in time. 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 in the baffles on both sides through the double-layer oil tank assembly 50. The laser particle analyzer is used to analyze half of the fuel particles entering the detection area, and the atomization particle size result of the large-flow fuel nozzle can be detected.

[0044] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0045] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by 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 transmitter (20), a laser receiver (21), and a computer (22); the laser transmitter (20) is installed on one side of the detection chamber and faces the transparent window, and the laser receiver (21) is installed next to the transparent window on the other side of the detection chamber; The atomization particle size test tool comprises a nozzle mounting seat (30), a mounting plate (40), a double-layer oil tank assembly (50), and a baffle (60); the atomization particle size test tool (3) is mounted on the top of the detection chamber (10) through 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 central seat hole of the mounting plate (40) using a connecting structure 2; the double-layer oil tank assembly (50) is connected to the upper end surface of the central seat hole of the mounting plate (40) through a connecting structure 1; the double-layer oil tank assembly (50) is connected to the upper end surface of the central seat hole of the mounting plate (40) through a connecting structure 2; the double-layer oil tank assembly (50) is connected to the upper end surface of the central seat hole of the mounting plate (40) through a connecting structure 3 ... The structure three is fixed to the lower end surface of the central seat hole of the mounting plate (40); the baffle plate (60) is fixed together with the double-layer oil tank assembly (50) so that its upper end surface is fitted to 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 symmetrical to the center of the nozzle of its fuel nozzle (70).

2. The atomization particle size 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 at 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 central seat hole of the mounting plate (40).

3. The atomization particle size detection device for a large flow fuel nozzle according to claim 1, characterized in that: 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 ventilation holes are evenly distributed along the circumference of the outer periphery of the central seat hole.

4. A method for detecting the atomization performance of a large flow fuel nozzle according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: assembling the detection tooling, adjusting the installation position of the double-layer oil tank assembly (50) so that the knife edge on its side faces the symmetric 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 in the baffles (60) on both sides, and 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 the atomization particle size detection area of ​​the fuel nozzle atomization particle size detection area is subjected to a particle analyzer.

5. The method for detecting the atomization performance of a large flow fuel nozzle according to claim 4, characterized in that: The upper oil tank (51) is a semi-enclosed long oil tank.

6. The method for detecting the atomization performance of a large flow fuel nozzle according to claim 4, characterized in that: The other side of the oil tank 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 fixed by welding; and a plurality of oil holes in the middle are connected with the lower oil tank.

7. The method for detecting the atomization performance of a large flow fuel nozzle according to claim 4, characterized in that: The lower oil groove (52) is a semi-I-shaped groove structure, the inner width of which is 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.

8. The method for detecting the atomization performance of a large flow fuel nozzle according to claim 4, characterized in that: The baffle (60) is composed of two arc-shaped columnar thin plates, and is welded and fixed together with two oil pipes (53) of the double-layer oil tank assembly (50) through four rectangular thin plates.

9. The method for detecting the atomization performance of a large flow fuel nozzle according to claim 4, characterized in that: The side surface of the double-layer oil tank component (50) is in the shape of a knife edge, and the knife edge maintains a sharp edge; the side surface of the double-layer oil tank component (50) forms an angle of about 45° with the end surface of the fuel nozzle (70).

10. The method for detecting the atomization performance of a large flow fuel nozzle according to claim 4, characterized in that: The lower part of the detection chamber (10) is provided with an exhaust device (11) to timely extract the mist generated after the fuel nozzle (70) sprays out of the detection chamber (10).

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