Nozzle flow measuring tool

Abstract

The utility model provides a flow measuring tool for a nozzle, which comprises a flow guide seat provided with an accommodating cavity for accommodating the front end of the nozzle, and a main oil guide channel and an auxiliary oil guide channel both communicated with the accommodating cavity; the main oil quantity measurer is arranged corresponding to the main oil guiding channel and is used for measuring oil liquid output by a main oil spraying opening of the nozzle through the main oil guiding channel; and the auxiliary oil quantity measurer is arranged corresponding to the auxiliary oil guide channel and is used for measuring the oil liquid output by the auxiliary oil injection port of the nozzle through the auxiliary oil guide channel. Therefore, the quantity of oil output by the main oil injection port of the nozzle can be measured through the main oil quantity measurer, the quantity of oil output by the auxiliary oil injection port of the nozzle can be measured through the auxiliary oil quantity measurer, and then the flow characteristics of the main oil injection port and the auxiliary oil injection port of the nozzle can be conveniently and accurately known at the same time; therefore, the flow measuring tool and the nozzle can be quickly aligned and installed, and the main oil guide channel and the main oil injection port as well as the auxiliary oil guide channel and the auxiliary oil injection port can be quickly aligned.

Description

Technical Field

[0001] This utility model relates to the field of engine testing, specifically to a nozzle flow measurement fixture. Background Technology

[0002] The fuel nozzle of an aircraft engine is a key component that supplies fuel and organizes combustion in the combustion chamber. The fuel flow characteristics of the nozzle directly affect the fuel supply pattern, combustion efficiency, emissions, and outlet temperature distribution. At the same time, the fuel flow characteristics also indicate whether the nozzle will experience fuel coking and blockage after long-term service. A qualified fuel flow characteristic is crucial. Therefore, the fuel flow of the nozzle needs to be measured both when the nozzle leaves the factory and during post-service maintenance.

[0003] Since current aircraft engine nozzles typically employ a multi-path design, including a main fuel injection port and auxiliary fuel injection ports, with multiple main fuel injection ports surrounding the auxiliary fuel injection ports, it has become a challenge to conveniently and accurately measure the flow characteristics of both the main and auxiliary fuel injection ports simultaneously. Utility Model Content

[0004] This utility model is made to solve the above-mentioned technical problems, and its purpose is to provide a nozzle flow measurement tool that can measure the flow rate of a nozzle.

[0005] This utility model discloses a nozzle flow measurement fixture, comprising: a flow guide seat with a receiving cavity for accommodating the nozzle tip, and a main oil channel and a secondary oil channel both connected to the receiving cavity; a main oil quantity measuring device corresponding to the main oil channel for measuring the oil output from the main injection port of the nozzle through the main oil channel; and a secondary oil quantity measuring device corresponding to the secondary oil channel for measuring the oil output from the secondary injection port of the nozzle through the secondary oil channel. Thus, on one hand, the main oil quantity measuring device can measure the oil output from the main injection port of the nozzle, and the secondary oil quantity measuring device can measure the oil output from the secondary injection port of the nozzle, thereby conveniently and accurately obtaining the flow characteristics of both the main and secondary injection ports simultaneously. On the other hand, by accommodating the nozzle tip in the receiving cavity, the flow measurement fixture can be quickly aligned with the nozzle, thereby enabling quick alignment between the main oil channel and the main injection port, and between the secondary oil channel and the secondary injection port, improving the installation efficiency of the device.

[0006] Optionally, the nozzle tip is provided with a non-coplanar front end face and a first stepped surface, the auxiliary injection port is located on the front end face, and the main injection port is located on the first stepped surface; the bottom surface of the accommodating cavity corresponds to the front end face of the nozzle, and the bottom surface of the cavity has an opening connecting to the auxiliary oil guide channel; the peripheral wall of the accommodating cavity is provided with a second stepped surface that is not coplanar with the bottom surface of the cavity, the second stepped surface corresponds to the first stepped surface, and the second stepped surface has an opening connecting to the main oil guide channel. In this way, the heights of the second stepped surface and the bottom surface of the cavity are not identical, thereby better isolating the oil sprayed from the main injection port and the auxiliary injection port of the nozzle, preventing mutual flow from affecting the measurement results.

[0007] Optionally, one of the bottom surface of the accommodating cavity and the second stepped surface is used to abut against the nozzle tip, thereby limiting the nozzle position.

[0008] Optionally, the bottom surface of the accommodating cavity is used to abut against the front end face of the nozzle; a gap is reserved between the second stepped surface of the accommodating cavity and the first stepped surface of the nozzle, which can prevent installation interference and ensure effective tight fit between the bottom surface of the cavity and the front end face of the nozzle.

[0009] Optionally, the first and second circumferential surfaces of the accommodating cavity are both used for clearance fitting with the nozzle; wherein the first circumferential surface, the second stepped surface, and the second circumferential surface are arranged sequentially in a direction away from the bottom surface of the cavity. This avoids interference or over-constraint during assembly, improving the convenience and reliability of tooling assembly and disassembly.

[0010] Optionally, multiple main oil channels are arranged around the secondary oil channels, and there is a one-to-one correspondence between the main oil channels, the main oil quantity measuring device, and the main fuel injector, so as to realize independent measurement of the oil quantity of each main fuel injector.

[0011] Optionally, the diameter of the secondary oil guide channel is larger than the diameter of the secondary oil injection port. This can avoid throttling during oil flow, which would affect the test results, ensure smooth fuel outflow, and improve the accuracy of flow rate testing.

[0012] Optionally, the main fuel passage includes a first main fuel passage and a second main fuel passage connected sequentially along a path away from the receiving cavity; the diameters of the main fuel injector, the first main fuel passage, and the second main fuel passage increase in that order. This further avoids abnormalities such as throttling, further ensures smooth fuel flow, and improves the accuracy of flow rate testing.

[0013] Optionally, it also includes a conduit, through which the main oil passage is connected to the main oil quantity measuring device, and / or, through which the secondary oil passage is connected to the secondary oil quantity measuring device, thereby facilitating oil measurement.

[0014] Optionally, the guide seat includes a base portion and a first protrusion and a second protrusion both disposed on the base portion; the receiving cavity is disposed on the base portion; the main oil channel is respectively connected to the receiving cavity and an opening disposed on the first protrusion; the secondary oil channel is respectively connected to the receiving cavity and an opening disposed on the second protrusion; the first protrusion corresponds to the main oil quantity measuring device, and the second protrusion corresponds to the secondary oil quantity measuring device. The arrangement of the first and second protrusions allows the guide seat to exhibit different external features, thereby enabling the main oil quantity measuring device and the main oil channel to quickly align, and the secondary oil quantity measuring device and the secondary oil channel to quickly align, thus facilitating oil discharge.

[0015] The beneficial effects of this utility model are as follows:

[0016] This application discloses a nozzle flow measurement fixture, comprising: a flow guide seat, having a receiving cavity for accommodating the nozzle tip, and a main oil channel and a secondary oil channel both connected to the receiving cavity; a main oil quantity measuring device corresponding to the main oil channel, used to measure the oil output from the main injection port of the nozzle through the main oil channel; and a secondary oil quantity measuring device corresponding to the secondary oil channel, used to measure the oil output from the secondary injection port of the nozzle through the secondary oil channel.

[0017] Thus, on the one hand, the fuel output from the main injection port of the nozzle can be measured by the main fuel quantity measuring device, and the fuel output from the auxiliary injection port of the nozzle can be measured by the auxiliary fuel quantity measuring device, thereby conveniently and accurately obtaining the flow characteristics of the main injection port and the auxiliary injection port of the nozzle simultaneously; on the other hand, the nozzle tip is housed in the receiving cavity, so that the flow measurement fixture and the nozzle can be aligned and installed more quickly, thereby enabling the alignment between the main fuel channel and the main injection port, and between the auxiliary fuel channel and the auxiliary injection port more quickly, improving the installation efficiency of the device of this application. Attached Figure Description

[0018] The above-described features and advantages of this invention can be better understood after reading the following detailed description of the embodiments of this disclosure in conjunction with the accompanying drawings. In the drawings, the components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0019] Figure 1 This is a diagram of the combustion chamber structure;

[0020] Figure 2 This is a structural diagram of the flow measurement tooling of this utility model;

[0021] Figure 3 This is a plan view of the flow measurement fixture of this utility model;

[0022] Figure 4This is an internal diagram of the flow measurement fixture of this utility model;

[0023] Figure 5 This is a schematic diagram of the flow measurement fixture for measuring the flow rate of the nozzle.

[0024] Figure 6 This is another schematic diagram of the flow measurement fixture of this utility model measuring nozzle flow;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1-Outer annular cavity air, 2-Head air intake, 3-Inner annular cavity air,

[0027] 10-Nozzle, 11-Main injection port, 12-Secondary injection port, 20-Flame tube, 30-Jet housing

[0028] 100-flow guide seat,

[0029] 110 - Base portion, 120 - First protrusion, 130 - Second protrusion,

[0030] 101-Main oil channel, 1011-First main oil channel, 1012-Second main oil channel, 102-Secondary guide oil channel, 103-Bottom surface of cavity, 107-Receiving cavity,

[0031] 104 - Second step surface, 105 - First perimeter surface, 106 - Second perimeter surface

[0032] 200-Main Oil Quantity Measuring Instrument

[0033] 300-Auxiliary oil level gauge

[0034] 400-catheter. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0036] It should be noted that these and other accompanying drawings are merely examples and are not drawn to scale, and should not be used as a limitation on the scope of protection of this utility model.

[0037] The combustion chamber structure of an aircraft engine is as follows Figure 1As shown, the system includes a fuel nozzle 10, a flame tube 20, and a casing 30. The nozzle 10 is fixedly connected to the casing 30, and its front end connects to the flame tube 20. The airflow entering the combustion chamber is divided into three streams: outer annular air 1, head intake air 2, and inner annular air 3. After being compressed by the compressor, the air enters the combustion chamber, mixes with the fuel output from the fuel line of the nozzle 10, and then burns in the flame tube 20. The resulting high-temperature combustion gas flows backward to drive the turbine and perform work.

[0038] The nozzle 10 typically employs a multi-orifice design, including a main injection port 11 and a secondary injection port 12. Multiple main injection ports 11 are usually arranged around the secondary injection ports 12. Therefore, conveniently and accurately measuring the fuel flow characteristics of both the main injection port 11 and the secondary injection ports 12 simultaneously becomes a challenge. This led to the development of the technical solution in this application, which is described below in conjunction with... Figures 2-6 To elaborate.

[0039] like Figures 4-6 As shown, this application discloses a nozzle flow measurement fixture, including a guide seat 100, a main oil quantity measuring device 200, and a secondary oil quantity measuring device 300. The nozzle 10 is as follows... Figure 5 As shown, the nozzle 10 is provided with a main oil passage and a secondary oil passage. The front end of the nozzle 10 is provided with a main fuel injection port 11 that connects to the main oil passage and a secondary fuel injection port 12 that connects to the secondary oil passage. The fuel delivered by the main oil passage is injected into the flame tube 20 through the main fuel injection port 11, and the fuel delivered by the secondary oil passage is injected into the flame tube 20 through the secondary fuel injection port 12. Several main fuel injection ports 11 are usually arranged around the secondary fuel injection ports 12 to ensure the uniformity of fuel injection.

[0040] The guide seat 100 is provided with a receiving cavity 107, a main oil channel 101 and a secondary oil channel 102; the receiving cavity 107 is used to receive the front end of the nozzle 10, and the main oil channel 101 and the secondary oil channel 102 are both connected to the receiving cavity 107.

[0041] The main oil quantity measuring device 200 is set corresponding to the main oil channel 101 and is used to measure the oil output from the main injection port 11 of the nozzle 10 through the main oil channel 101; the auxiliary oil quantity measuring device 300 is set corresponding to the auxiliary oil channel 102 and is used to measure the oil output from the auxiliary injection port 12 of the nozzle 10 through the auxiliary oil channel 102.

[0042] The main oil quantity measuring device 200 and the auxiliary oil quantity measuring device 300 can be configured as measuring cylinders or other devices for measuring oil. In this way, on the one hand, the main oil quantity measuring device 200 can measure the oil quantity output from the main injection port 11 of the nozzle 10, and the auxiliary oil quantity measuring device 300 can measure the oil quantity output from the auxiliary injection port 12 of the nozzle 10, thereby conveniently and accurately obtaining the flow characteristics of the main injection port and the auxiliary injection port of the nozzle simultaneously. On the other hand, the front end of the nozzle 10 is housed in the receiving cavity 107, so that the flow measurement fixture can be quickly aligned and installed with the nozzle 10, thereby enabling quick alignment between the main oil passage 101 and the main injection port 11, and between the auxiliary oil passage 102 and the auxiliary injection port 12, improving the installation efficiency of the device of this application.

[0043] Optionally, the nozzle 10 has a non-coplanar front end face and a first stepped surface at its front end, the auxiliary fuel injection port 12 is located on the front end face, and the main fuel injection port 11 is located on the first stepped surface.

[0044] The bottom surface 103 of the accommodating cavity 107 corresponds to the front end face of the nozzle 10, and the bottom surface 103 has an opening communicating with the secondary oil guide channel 102. The peripheral wall of the accommodating cavity 107 is provided with a second stepped surface 104 that is not coplanar with the bottom surface 103. The second stepped surface 104 corresponds to the first stepped surface and has an opening communicating with the main oil guide channel 101. The taper of the second stepped surface 104 is consistent with that of the first stepped surface.

[0045] In this way, the heights of the second step surface 104 and the bottom surface 103 of the cavity can be made different, thereby better isolating the oil sprayed from the main oil injection port 11 and the auxiliary oil injection port 12 of the nozzle 10 and preventing them from flowing together and affecting the measurement results.

[0046] Optionally, one of the cavity bottom surface 103 and the second stepped surface 104 of the accommodating cavity 107 is used to abut against the front end of the nozzle 10, thereby limiting the nozzle 10.

[0047] Optionally, the bottom surface 103 of the accommodating cavity 107 is used to abut against the front end surface of the nozzle 10, and a gap is reserved between the second step surface 104 of the accommodating cavity 107 and the first step surface of the nozzle 10. This can prevent installation interference and ensure effective tight fit between the bottom surface 103 of the cavity and the front end surface of the nozzle 10.

[0048] Optionally, the gap between the second step surface 104 and the first step surface of the nozzle 10 is ≤0.5mm, thereby preventing oil leakage between the main injection port 11 and the auxiliary injection port 12, and thus ensuring the accuracy of oil quantity measurement.

[0049] Optionally, a certain clamping force F can be applied to the nozzle 10 by using a screw or clamping block to ensure that the bottom surface 103 of the cavity and the front end of the nozzle 10 are tightly fitted together, so that the measuring fixture and the nozzle 10 are not easily separated, and the test is effective and reliable.

[0050] Optionally, the first circumferential surface 105 and the second circumferential surface 106 of the accommodating cavity 107 are both used for clearance fit with the nozzle 10; wherein, the first circumferential surface 105, the second stepped surface 104, and the second circumferential surface 106 are arranged sequentially in a direction away from the bottom surface 103 of the cavity, and their diameters increase progressively. In this way, interference or over-constraint during the assembly process can be avoided, and the convenience and reliability of tooling assembly and disassembly can be improved.

[0051] Optionally, multiple main oil channels 101 are arranged around the secondary oil channels 102, and the main oil channels 101, the main oil quantity measuring device 200 and the main fuel injector 11 correspond one-to-one to realize independent measurement of the oil quantity of each main fuel injector 11.

[0052] Optionally, the diameter of the main oil passage 101 is larger than the diameter of the main fuel injector 11; the diameter of the secondary oil passage 102 is larger than the diameter of the secondary fuel injector 12. This can avoid throttling during oil flow and thus avoid affecting the test results, ensuring smooth fuel outflow and improving the accuracy of flow rate testing.

[0053] Optionally, the main fuel passage 101 includes a first main fuel passage 1011 and a second main fuel passage 1012 connected sequentially in a direction away from the receiving cavity 107; the first main fuel passage 1011 corresponds to the main fuel injection port 11 of the nozzle 10, and the second main fuel passage 1012 corresponds to the main fuel quantity measuring device 200. The diameters of the main fuel injection port 11, the first main fuel passage 1011, and the second main fuel passage 1012 increase in sequence. This further avoids abnormalities such as throttling, further ensures smooth fuel flow, and improves the accuracy of flow rate testing.

[0054] Optionally, the flow measurement fixture also includes a conduit 400, through which the main oil channel 101 is connected to the main oil quantity measuring device 200, and / or, through which the secondary oil channel 102 is connected to the secondary oil quantity measuring device 300, thereby facilitating oil measurement.

[0055] Optionally, such as Figures 2-4As shown, the guide seat 100 includes a base portion 110, and a first protrusion 120 and a second protrusion 130 both disposed on the base portion 110. A receiving cavity 107 is disposed on the base portion 110; the main oil channel 101 connects the receiving cavity 107 and an opening on the first protrusion 120; the secondary oil channel 102 connects the receiving cavity 107 and an opening on the second protrusion 130.

[0056] The first protrusion 120 is provided corresponding to the main fuel quantity measuring device 200 so that the fuel flowing out of the main fuel injection port 11 is introduced into the main fuel quantity measuring device 200. The second protrusion 130 is provided corresponding to the auxiliary fuel quantity measuring device 300 so that the auxiliary fuel injection port 12 is introduced into the auxiliary fuel quantity measuring device 300.

[0057] By setting the first protrusion 120 and the second protrusion 130, the guide seat 100 presents different features on its surface, thereby enabling the main oil quantity measuring device 200 and the main oil channel 101 to quickly correspond and connect, and the auxiliary oil quantity measuring device 300 and the auxiliary oil channel 102 to quickly correspond and connect, thus facilitating oil discharge.

[0058] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible variations and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A flow measurement fixture for a nozzle, characterized in that, include: The guide seat (100) is provided with a receiving cavity (107) for receiving the front end of the nozzle (10), and a main oil passage (101) and a secondary oil passage (102) that are both connected to the receiving cavity (107); A main oil quantity measuring device (200) is provided corresponding to the main oil channel (101) for measuring the oil output from the main injection port (11) of the nozzle (10) through the main oil channel (101); A secondary oil quantity measuring device (300) is provided corresponding to the secondary oil guide channel (102) for measuring the oil output from the secondary oil injection port (12) of the nozzle (10) through the secondary oil guide channel (102).

2. The flow measurement fixture according to claim 1, characterized in that, The nozzle (10) has a non-coplanar front end surface and a first stepped surface at its front end. The auxiliary oil injection port (12) is located on the front end surface, and the main oil injection port (11) is located on the first stepped surface. The bottom surface (103) of the accommodating cavity (107) corresponds to the front end surface of the nozzle (10), and the bottom surface (103) of the cavity is provided with an opening that connects to the auxiliary oil guide channel (102); The periphery of the accommodating cavity (107) is provided with a second stepped surface (104) that is not coplanar with the bottom surface (103) of the cavity. The second stepped surface (104) corresponds to the first stepped surface and has an opening that connects to the main oil passage (101).

3. The flow measurement fixture according to claim 2, characterized in that, One of the cavity bottom surface (103) and the second stepped surface (104) of the accommodating cavity (107) is used to abut the front end of the nozzle (10).

4. The flow measurement fixture according to claim 3, characterized in that, The bottom surface (103) of the accommodating cavity (107) is used to abut against the front end surface of the nozzle (10); A gap is reserved between the second step surface (104) of the accommodating cavity (107) and the first step surface of the nozzle (10).

5. The flow measurement fixture according to claim 3, characterized in that, The first circumferential surface (105) and the second circumferential surface (106) of the accommodating cavity (107) are both used to fit with the nozzle (10) with a clearance. The first peripheral surface (105), the second stepped surface (104), and the second peripheral surface (106) are arranged sequentially in a direction away from the cavity bottom surface (103).

6. The flow measurement fixture according to claim 1, characterized in that, Multiple main oil channels (101) are arranged around the secondary oil channels (102). There is a one-to-one correspondence between the main oil passage (101), the main oil quantity measuring device (200), and the main oil injection port (11).

7. The flow measurement fixture according to claim 1, characterized in that, The diameter of the secondary oil guide channel (102) is larger than the diameter of the secondary oil injection port (12).

8. The flow measurement fixture according to claim 1, characterized in that, The main oil passage (101) includes a first main oil passage (1011) and a second main oil passage (1012) that are sequentially connected along a path away from the receiving cavity (107); The diameters of the main fuel injector (11), the first main fuel channel (1011), and the second main fuel channel (1012) increase sequentially.

9. The flow measurement fixture according to claim 1, characterized in that, It also includes a catheter (400), The main oil passage (101) is connected to the main oil quantity measuring device (200) through the conduit (400), and / or the secondary oil passage (102) is connected to the secondary oil quantity measuring device (300) through the conduit (400).

10. The flow measurement fixture according to claim 1, characterized in that, The flow guide seat (100) includes a base portion (110), and a first protrusion (120) and a second protrusion (130) both provided on the base portion (110); The accommodating cavity (107) is provided in the base portion (110); The main oil passage (101) is connected to the accommodating cavity (107) and the opening provided on the first protrusion (120); The secondary oil guide channel (102) is connected to the accommodating cavity (107) and the opening provided on the second protrusion (130); The first protrusion (120) is provided corresponding to the main oil quantity measuring device (200), and the second protrusion (130) is provided corresponding to the auxiliary oil quantity measuring device (300).

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