High-sensitivity measuring device for detecting atomization angle of fuel nozzle

Abstract

The utility model relates to the technical field of aeroengine fuel nozzle atomization angle detection, in particular to a high-sensitivity measuring device for detecting the atomization angle of a fuel nozzle, which comprises a mounting plate, a nozzle and two high-sensitivity measuring components are arranged on the mounting plate, the central sections of the nozzle and the two high-sensitivity measuring components are overlapped, and the measured atomization angle is ensured to be the maximum angle. The high-sensitivity measuring assembly comprises a probe seat, a rotating shaft is rotationally connected to the probe seat, a probe is fixedly connected to the rotating shaft, the probe is in threaded connection with a first end of a screw, a second end of the screw is fixedly connected with a pull pressure sensor, the probe rotates on the rotating shaft, so that a lever structure is formed, the force of oil drops impacting the probe is amplified, and the oil drops are detected. The detection sensitivity of the pull pressure sensor is improved, so that the measurement of the atomization angle of the nozzle is more accurate, and the possibility of explosion caused by contact between combustible spray generated by the nozzle and an electrical element in the testing process is reduced by filling the linear displacement sensor protection shell and the stepping motor protection shell with positive pressure gas.

Description

Technical Field

[0001] The utility model relates to the technical field of atomization angle detection of a fuel nozzle of an aviation engine, in particular to a highly sensitive measuring device for detecting the atomization angle of a fuel nozzle. Background Art

[0002] The characteristics of fuel nozzles include flow rate, spray cone angle, etc. The size of the spray cone angle affects the combustion effect of the fuel inside the flame tube, so it is necessary to detect and determine the size of the spray cone angle. The measurement accuracy of the nozzle's atomization angle directly determines whether the nozzle's performance meets the requirements, which is related to the performance of the engine.

[0003] The patent with the announcement number CN113720277B relates to an automatic measurement mechanism and method for the atomization angle of a fuel nozzle, including a measuring device, the measuring device is provided with two groups, the two groups of measuring devices are respectively located on opposite sides of the nozzle, the measuring device includes a probe slidably connected to the test installation panel and a driving device driving the probe to approach or move away from the nozzle, the driving device is configured to stop when oil drops fall on the probe. It has the effect of increasing the measurement accuracy and improving the consistency of the detection results when detecting the atomization angle of the nozzle.

[0004] The above patent has the advantage of contacting the probe when detecting the oil droplets sprayed from the nozzle. However, since the impact force of the oil droplets on the probe is small, the probe cannot detect whether it has contacted the oil droplets sprayed from the nozzle. Therefore, a highly sensitive measuring device is required to more accurately measure the angle of nozzle atomization. Utility Model Content

[0005] The utility model aims to provide a high-sensitivity measuring device for detecting the atomization angle of a fuel nozzle, thereby solving the problem that the atomization angle of the nozzle cannot be measured with high sensitivity in the prior art.

[0006] The utility model is realized through the following technical scheme: a highly sensitive measuring device for detecting the atomization angle of a fuel nozzle, comprising a mounting plate, on which a nozzle and two highly sensitive measuring components are arranged, and the central cross sections overlap, so as to ensure that the measured atomization angle is the maximum angle, and the highly sensitive measuring component comprises a probe seat, on which a rotary shaft is rotatably connected, on which a probe is fixedly connected, on which a first end of a screw is threadedly connected, and on which a tension and pressure sensor is fixedly connected the second end of the screw.

[0007] In order to better implement the utility model, further, the end of the tension and pressure sensor away from the probe is also fixedly connected to the first end of a screw, the second end of the screw is threadedly connected to the mounting bracket, and the mounting bracket is fixedly connected to the probe seat.

[0008] In order to better realize the utility model, further, a guide rail slider is fixedly installed on the mounting plate, and the probe seat is slidably connected to the guide rail slider.

[0009] In order to better realize the utility model, further, a stepper motor is fixedly mounted on the mounting plate, a gear is provided at the output end of the stepper motor, a rack is fixedly connected to the probe seat, and the rack is meshed with the gear of the stepper motor.

[0010] In order to better implement the utility model, further, a first end of a connecting piece is fixedly connected to the probe seat, a second end of the connecting piece is fixedly connected to an input end of the linear displacement sensor, and the linear displacement sensor is fixedly mounted on a mounting plate.

[0011] In order to better implement the utility model, further, the probe is divided into two parts by the rotating axis, and the distance of the part close to the tension and pressure sensor, that is, the distance from the tension and pressure sensor to the rotating axis is much smaller than the distance from the rotating axis on the probe to the end of the probe away from the tension and pressure sensor.

[0012] In order to better realize the utility model, further, a linear displacement sensor protective shell and a stepper motor protective shell are installed on the mounting plate, the linear displacement sensor protective shell is mounted on the linear displacement sensor, the stepper motor protective shell is mounted on the stepper motor, and the linear displacement sensor protective shell and the stepper motor protective shell are filled with positive pressure gas.

[0013] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0014] 1. The utility model forms a lever structure by rotating the probe on the rotary shaft, amplifies the force of the oil droplet impacting the probe, improves the detection sensitivity of the tension pressure sensor, and thus makes the measurement of the nozzle atomization angle more accurate.

[0015] 2. The utility model fills the linear displacement sensor protective shell and the stepper motor protective shell with positive pressure gas, thereby reducing the possibility of explosion caused by the combustible spray generated by the nozzle contacting the electrical components during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the mounting plate of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the probe of the utility model;

[0019] Figure 4 This is a schematic diagram of the atomization angle of the nozzle of the utility model;

[0020] Among them, 1-mounting plate; 2-high-sensitivity measuring component; 3-nozzle; 21-probe; 22-probe seat; 23-screw; 24-tension pressure sensor; 25-mounting frame; 26-rotating shaft; 27-guide rail slider; 28-connecting piece; 29-linear displacement sensor; 210-stepping motor; 211-rack; 212-linear displacement sensor protective shell; 213-stepping motor protective shell. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] like Figures 1 to 4 As shown, a highly sensitive measuring device for detecting the atomization angle of a fuel nozzle comprises a mounting plate 1, on which a nozzle 3 and two highly sensitive measuring components 2 are arranged, and the central sections overlap to ensure that the measured atomization angle is the maximum angle, and the highly sensitive measuring component 2 comprises a probe seat 22, on which a rotary shaft 26 is rotatably connected, on which a probe 21 is fixedly connected, on which a first end of a screw rod 23 is threadedly connected, and on which a tension pressure sensor 24 is fixedly connected at the second end of the screw rod 23. The tension pressure sensor 24 is of explosion-proof type and can meet the requirements of the use environment.

[0024] The end of the tension and pressure sensor 24 away from the probe 21 is also fixedly connected to the first end of a screw rod 23 , and the second end of the screw rod 23 is threadedly connected to a mounting bracket 25 , and the mounting bracket 25 is fixedly connected to the probe seat 22 .

[0025] A guide rail slider 27 is fixedly mounted on the mounting plate 1 , and the probe seat 22 is slidably connected to the guide rail slider 27 .

[0026] A stepper motor 210 is fixedly mounted on the mounting plate 1 , a gear is disposed at the output end of the stepper motor 210 , a rack 211 is fixedly connected to the probe seat 22 , and the rack 211 meshes with the gear of the stepper motor 210 .

[0027] When in use, the mounting plate 1 is provided with a groove, through which the mounting plate 1 is inserted into the nozzle 3, thereby fixing the connection between the mounting plate 1 and the nozzle 3, thereby ensuring stability during detection. The stepper motor 210 is started, and the gear on the stepper motor 210 drives the rack 211 to slide on the mounting plate 1, so that the rack 211 drives the probe seat 22 to slide on the guide slider 27, thereby driving the probe 21 to move toward the direction of the nozzle 3.

[0028] like Figure 2 and Figure 3 As shown, when the front end of the probe 21 contacts the oil droplets sprayed from the nozzle 3, the oil droplets exert a downward force on the probe 21, so that the probe 21 tends to rotate clockwise on the rotating shaft 26, so that the probe 21 lifts the screw 23 close to one end of the stepper motor 210, and the screw 23 pulls the tension pressure sensor 24, so that the tension detected by the tension pressure sensor 24 increases, so that the tension pressure sensor 24 feeds back the data to the PLC controller through the transmitter. After receiving the signal, the PLC controller sends a stop signal to the driver of the stepper motor 210, the stepper motor 210 stops moving, and then the probe 21 stops moving, thereby realizing the automatic detection of the nozzle spray angle edge by the high-sensitivity measurement component 011.

[0029] like Figure 2 like Figure 3 As shown, in the initial state, the probe 21 has a torque F1×L1=F high-sensitivity measuring component 2×L high-sensitivity measuring component 2, L1>L high-sensitivity measuring component 2, forming a lever mechanism, that is, the length of the rod on the right side of the rotating shaft 26 on the probe 21 is much longer than the length of the rod on the left side of the rotating shaft 26, so that the probe 21 itself will have a tendency to rotate clockwise on the rotating shaft 26 due to its own gravity, so that the probe 21 pulls the tension pressure sensor 24 through the screw 23, so that the tension pressure sensor 24 has a tension value in the initial state, so that during detection, the weight F1 of the oil droplet will be amplified by the lever mechanism, and the tension pressure sensor 24 will easily detect this value, and then sense the numerical difference of the tension change to determine whether it has contacted the oil droplet sprayed from the nozzle 3.

[0030] Since the stepper motor 210 drives the probe holder 22 to move at a consistent speed each time the detection is performed, and stops automatically at the moment when the oil drop falls onto the tip of the probe 21, the measurement accuracy is greatly increased, and the repeatability accuracy of the measurement result is improved.

[0031] Embodiment 2:

[0032] like Figure 2 As shown, a first end of a connecting piece 28 is fixedly connected to the probe seat 22 , a second end of the connecting piece 28 is fixedly connected to an input end of a linear displacement sensor 29 , and the linear displacement sensor 29 is fixedly mounted on the mounting plate 1 .

[0033] The probe 21 is divided into two parts by the rotating axis 26 , and the distance of the part close to the tension and pressure sensor 24 , i.e. the distance from the tension and pressure sensor 24 to the rotating axis 26 , is much smaller than the distance from the rotating axis 26 to the end of the probe 21 away from the tension and pressure sensor 24 .

[0034] When in use, the linear displacement sensor 29 is also connected to the PLC controller. When the probe 21 moves, the input end of the linear displacement sensor 29 is pulled by the connecting piece 28, so that the distance moved by the probe 21 is detected by the displacement distance of the input end. When the linear displacement sensor 29 detects that the probe 21 has moved, the data is transmitted to the PLC controller. When the probe 21 no longer moves, that is, the movement of the input end detected on the linear displacement sensor 29 no longer changes, the linear displacement sensor 29 no longer transmits data to the PLC controller. Therefore, when the PLC controller cannot receive the data on the linear displacement sensor 29, the PLC controller starts to calculate the atomization angle of the nozzle 3 through the movement amount of the probe 21 that the linear displacement sensor 29 has detected.

[0035] like Figure 4 As shown, the distance, height, atomization angle and calculation formula are stored in the PLC controller, where the distance S is the difference between the farthest horizontal distance between the probe 21 and the central axis of the nozzle 3 and the distance traveled when the probe 21 contacts the oil droplets at the edge of the atomization angle of the nozzle 3, that is, the horizontal distance between the position where the probe 21 contacts the oil droplets and the central axis of the nozzle 3; the height H is the vertical distance between the horizontal plane of the injection point at the outlet of the nozzle 3 and the axis where the probe 21 is located, and the atomization angle α is the atomization angle of the nozzle 3.

[0036] When the two linear displacement sensors 29 detect the movement of the two probes 21 respectively, the detected values ​​are transmitted to the PLC controller. The PLC controller can obtain the distance S1 between the probe 21 and the central axis of the nozzle 3 by calculating the moving distance S, wherein the nozzle 3 is a cylindrical nozzle, so the central axis of the nozzle 3 is the axis of the nozzle 3; the same method can also be used to obtain the distance S between the other probe 21 and the central axis of the nozzle 3. The high-sensitivity measurement component 2, and then according to the known distance between the injection point of the nozzle 3 and the axis of the probe 21, that is, the preset height H, the atomization angle α of the nozzle 3 can be calculated by the preset formula. The specific preset formula is:

[0037] α=α1+αhigh-sensitivity measurement component 2=arctan(S1 / H)+arctan(Shigh-sensitivity measurement component 2 / H).

[0038] After the PLC controller calculates the atomization angle α of the nozzle 3, it compares the atomization angle α of the nozzle 3 with the pre-stored standard nozzle atomization angle. If the atomization angle α ≥ the standard nozzle atomization angle, it is determined that the nozzle 3 meets the requirements; otherwise, it is determined that the nozzle 3 does not meet the requirements. In this way, the automatic measurement of the nozzle atomization angle is realized, and the measurement result is more accurate and convenient.

[0039] A linear displacement sensor protective shell 212 and a stepper motor protective shell 213 are installed on the mounting plate 1. The linear displacement sensor protective shell 212 is sleeved on the linear displacement sensor 29, and the stepper motor protective shell 213 is sleeved on the stepper motor 210. The linear displacement sensor protective shell 212 and the stepper motor protective shell 213 are filled with positive pressure gas.

[0040] By adopting the above technical solution, electrical components such as the stepper motor 210 and the linear displacement sensor 29 can be protected, thereby reducing the possibility of explosion caused by the combustible spray generated by the nozzle 3 contacting the electrical components during the test.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A highly sensitive measuring device for detecting the atomization angle of a fuel nozzle, comprising a mounting plate (1), characterized in that: The mounting plate (1) is provided with a nozzle (3) and two high-sensitivity measuring components (2), and the central cross sections overlap to ensure that the measured atomization angle is the maximum angle. The high-sensitivity measuring component (2) comprises a probe seat (22), a rotary shaft (26) is rotatably connected to the probe seat (22), a probe (21) is fixedly connected to the rotary shaft (26), a first end of a screw rod (23) is threadedly connected to the probe (21), and a tension pressure sensor (24) is fixedly connected to the second end of the screw rod (23).

2. A highly sensitive measuring device for detecting the atomization angle of a fuel nozzle according to claim 1, characterized in that: The end of the tension and pressure sensor (24) away from the probe (21) is also fixedly connected to the first end of a screw rod (23), the second end of the screw rod (23) is threadedly connected to a mounting frame (25), and the mounting frame (25) is fixedly connected to the probe seat (22).

3. A highly sensitive measuring device for detecting the atomization angle of a fuel nozzle according to claim 1, characterized in that: A guide rail slider (27) is fixedly mounted on the mounting plate (1), and the probe seat (22) is slidably connected to the guide rail slider (27).

4. A highly sensitive measuring device for detecting the atomization angle of a fuel nozzle according to claim 1, characterized in that: A stepper motor (210) is fixedly mounted on the mounting plate (1), a gear is provided at the output end of the stepper motor (210), a rack (211) is fixedly connected to the probe seat (22), and the rack (211) meshes with the gear of the stepper motor (210).

5. A highly sensitive measuring device for detecting the atomization angle of a fuel nozzle according to claim 4, characterized in that: The probe seat (22) is fixedly connected to a first end of a connecting piece (28), a second end of the connecting piece (28) is fixedly connected to an input end of a linear displacement sensor (29), and the linear displacement sensor (29) is fixedly mounted on the mounting plate (1).

6. A highly sensitive measuring device for detecting the atomization angle of a fuel nozzle according to claim 1, characterized in that: The probe (21) is divided into two parts by the rotating shaft (26), and the distance of the part close to the tension and pressure sensor (24), that is, the distance from the tension and pressure sensor (24) to the rotating shaft (26) is much smaller than the distance from the rotating shaft (26) on the probe (21) to the end of the probe (21) far from the tension and pressure sensor (24).

7. A highly sensitive measuring device for detecting the atomization angle of a fuel nozzle according to claim 1, characterized in that: A linear displacement sensor protection shell (212) and a stepper motor protection shell (213) are mounted on the mounting plate (1); the linear displacement sensor protection shell (212) is sleeved on the linear displacement sensor (29); the stepper motor protection shell (213) is sleeved on the stepper motor (210); and the linear displacement sensor protection shell (212) and the stepper motor protection shell (213) are filled with positive pressure gas.

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