Double-row-hole oil-throwing disc fuel flow measuring device

Abstract

The utility model discloses a kind of double-row hole oil flinger fuel flow measuring devices, including support frame, outer collector, inner collector. Outer collector is installed in support frame;Inner collector is fixed in outer collector;Outer collector and inner collector are including oil collection end and outlet end, and the oil collection end of outer collector protrudes in the oil collection end of inner collector;Outer collector is close to inner collector, and fuel flow channel is left between the two, double-row hole oil flinger is closely attached to inner collector;The second row hole of double-row hole oil flinger is located in the oil collection end of inner collector, and the first row hole of double-row hole oil flinger is located in the oil collection end of outer collector;Double-row hole oil flinger one end is communicated with hollow shaft. The utility model is compact by modularization design, oil mist is isolated from source, without modification test bed, significantly improve the measurement accuracy and fuel collection rate, and easy to operate, data is reliable.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine component testing technology, and in particular to a fuel flow measurement device with a double-row orifice oil slinger. Background Technology The dual-row orifice slinger is a core component of the combustion system in small and medium-sized gas turbine engines. It atomizes fuel into fine droplets through centrifugal force generated by high-speed rotation, providing a foundation for efficient and stable combustion. Even with identical geometric areas on both sides of the orifice, uneven flow distribution can occur in actual operation due to factors such as unstable flow. Therefore, accurately measuring the actual flow rate of both orifices is crucial for evaluating the performance of the dual-row orifice slinger and optimizing the operational stability of the combustion chamber.

[0002] In existing technologies, a common measurement method involves installing a partition inside the protective cover of a dual-row orifice oil slinger atomization test bench, dividing the space into two chambers to collect oil mist ejected from the orifices on both sides of the dual-row orifice oil slinger. The flow distribution on both sides is indirectly assessed by measuring the mass of fuel collected in each chamber. However, this approach has several significant drawbacks: First, because the partition is far from the high-speed rotating dual-row orifice oil slinger, atomized fuel droplets disperse randomly in the space, causing some oil mist that should belong to one side to drift to the other chamber, resulting in cross-contamination of data and poor accuracy and reliability of the measurement results. Furthermore, the inner wall area of ​​the test bench's protective cover is large, and a large amount of oil mist adheres to the inner wall, failing to be effectively collected, resulting in adhesion loss and introducing systematic errors. In addition, this partition structure needs to be integrated and installed during the initial design and construction of the test bench. For existing test benches without this pre-installed structure, retrofitting is not only difficult but also permanently damages the original structure, rendering it unusable for other normal atomization experiments. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a measuring device that can accurately and completely measure the fuel flow on both sides of the double-row orifice oil slinger and has good compatibility with existing test benches.

[0004] To achieve the above objectives, this utility model provides a dual-row orifice slinger fuel flow measuring device, which includes: Support frame; An outer collector, which is mounted on the support frame; An inner collector is fixed inside the outer collector; both the outer collector and the inner collector include an oil collecting end and an outlet end, and the oil collecting end of the outer collector protrudes from the oil collecting end of the inner collector. The outer collector is close to the inner collector, and a fuel flow channel is left between them; the double-row hole oil slinger is in close contact with the inner collector. The second row of holes of the double-row hole oil slinger is located inside the oil collection end of the inner collector, and the first row of holes of the double-row hole oil slinger is located inside the oil collection end of the outer collector. One end of the double-row hole oil slinger is connected to a hollow shaft.

[0005] In one embodiment, the oil collecting ends of the outer collector and the inner collector are respectively provided with a first arc-shaped baffle and a second arc-shaped baffle; The inner edge of the first arc-shaped baffle is aligned with the left edge of the fuel injection trajectory of the first row of holes of the double-row-hole oil slinger; the inner edge of the second arc-shaped baffle is aligned with the left edge of the fuel injection trajectory of the second row of holes of the double-row-hole oil slinger; to ensure that the conical oil mist generated by the double rows of holes of the double-row-hole oil slinger is completely and independently introduced into the outer collector and the inner collector respectively.

[0006] In one embodiment, the support frame is used to adjust the relative position of the outer collector / inner collector and the double-row oil slinger.

[0007] In one embodiment, the inner collector and the outer collector are connected by a fixing screw.

[0008] In one embodiment, the outer collector and the inner collector are cylindrical in shape, and both the outer collector and the inner collector are inclined downward from the oil collection end to the outlet end.

[0009] In one embodiment, the device further includes two high-precision measuring cups, which are disposed on the support frame and located below the outlet ends of the outer collector and the inner collector, respectively.

[0010] The above-described technical solutions in the embodiments of this utility model have at least the following technical effects or advantages: The dual-row orifice oil slinger fuel flow measuring device provided in this embodiment of the utility model adopts a double-layer compact collector structure, which is closely attached to the dual-row orifice oil slinger, physically isolating the oil mist on both sides from the source, completely eliminating cross-contamination, and ensuring that the measurement data can truly reflect the actual flow of each row of orifices.

[0011] Furthermore, because the outer and inner collectors are closely attached to the double-row orifice oil slinger, the distance between the fuel sprayed from the double-row orifice oil slinger and the outer / inner collector is very short (the fuel is sprayed outward in a cone shape from the double-row orifice), resulting in a smaller fuel diffusion range. This significantly reduces the area of ​​fuel sprayed onto the outer / inner collector (i.e., the fuel adhesion area), thereby enabling efficient collection of atomized fuel, significantly reducing adhesion loss, and improving measurement accuracy.

[0012] Furthermore, this utility model is an independent modular device that does not require any permanent modification to the existing test bench, and can be used immediately after installation, thus protecting the integrity and multifunctionality of the original test bench. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the structure of the double-row-hole oil slinger fuel flow measuring device provided in this embodiment of the utility model; Figure 2 A plan view of the fuel flow measurement device with a double-row orifice oil slinger provided in this embodiment of the utility model; Figure 3 A schematic diagram of the structure of the double-row hole oil slinger and the first arc-shaped baffle / second arc-shaped baffle provided in the embodiment of this utility model.

[0015] The labels for the various figures are as follows: 1. Double-row hole oil slinger; 2. Hollow shaft; 3. Outer collector; 4. Inner collector; 5. Fixing screw connection; 6. Support frame; 7. Measuring cup; 11. First row of holes; 12. Second row of holes; 31. First arc-shaped baffle; 41. Second arc-shaped baffle. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Please see Figures 1 to 3 This application provides a fuel flow measuring device with a dual-row orifice slinger 1, including a support frame 6, an outer collector 3 mounted on the support frame 6, and an inner collector 4 fixed inside the outer collector 3. Both collectors have an oil collection end and an outlet end. The key structure is that the outer collector 3 and the inner collector 4 are tightly fitted and nested together, forming an independent fuel flow channel between them. During installation, the dual-row orifice slinger 1 is tightly attached to the inner collector 4, with its first row of orifices 11 corresponding to the inside of the oil collection end of the outer collector 3, and its second row of orifices 12 corresponding to the inside of the oil collection end of the inner collector 4.

[0021] The compact, double-layered collector structure in this embodiment effectively isolates the oil mist ejected from the drain holes on both sides of the oil slinger at the source. Compared to the prior art method of using partitions for long-distance separation, this design eliminates cross-contamination of oil mist, ensuring that the fuel flowing from each collector outlet originates uniquely from its corresponding drain hole, thereby fundamentally improving the accuracy and reliability of measurement data.

[0022] To ensure complete fuel collection, the outer collector 3 is equipped with a first arc-shaped baffle 31 at its collecting end, and the inner collector 4 is equipped with a second arc-shaped baffle 41 at its collecting end. During alignment, the inner edge of the first arc-shaped baffle 31 is precisely aligned with the edge of the injection trajectory of the first row of holes 11, and the inner edge of the second arc-shaped baffle 41 is precisely aligned with the edge of the injection trajectory of the second row of holes 12.

[0023] These two arc-shaped baffles act like precise "diffusers," ensuring that the cone-shaped oil mist generated by the high-speed rotation of the oil slinger is completely and without loss, and guided into their respective collection channels without interference. This effectively solves the problem of incomplete collection caused by fuel dispersion and adhesion in the prior art, greatly reducing measurement errors and improving fuel collection rate and measurement accuracy.

[0024] The entire collector assembly (outer collector 3 and inner collector 4) is mounted on the support frame 6. This support frame 6 has an adjustment function, allowing for easy adjustment of the collector assembly's position relative to the double-row oil slinger 1, both front-to-back and vertically. Specifically, the support frame 6 can be equipped with an adjustment structure using a screw-slider mechanism, and the outer collector 3 can be mounted onto the slider of this mechanism to achieve position adjustment of the collector assembly.

[0025] The adjustable support frame 6 gives the device excellent flexibility and compatibility. Operators can easily and precisely align it during installation (step S1) to accommodate different sizes of oil-slinging pans or test benches. This makes the device a standalone modular unit, requiring no permanent modification to existing test benches, achieving "install and use immediately," and protecting the original functionality and integrity of the test bench.

[0026] like Figure 1 As shown, the inner collector 4 and the outer collector 3 are connected by fixing screws 5. The screw connection method is simple and reliable, which can ensure that the two collectors maintain a stable relative position during the test, ensuring the independence of the collection channel, and is easy to disassemble and clean, thus improving the maintenance convenience of the device.

[0027] In one embodiment, both the outer collector 3 and the inner collector 4 are designed as cylindrical structures, and during installation, they are inclined downwards from the oil collection end to the outlet end (the specific inclination angle can be set according to requirements). This allows gravity to be used to ensure that the fuel oil captured and condensed into liquid on the inner wall of the collector flows smoothly along the inclined inner wall to the outlet end, without accumulating inside the collector. This ensures that all collected fuel oil is discharged and measured in a timely manner, avoiding measurement errors caused by liquid residue.

[0028] In one embodiment, the device further includes two high-precision measuring cups 7, which are mounted on the support frame 6 and located directly below the outlet ends of the outer collector 3 and the inner collector 4, respectively.

[0029] These two measuring cups 7 are the tools for final data acquisition. By using the high-precision measuring cups 7, the volume or mass of fuel flowing out from the two independent channels can be accurately measured, providing accurate raw data for subsequent calculations of the actual flow rate, total flow rate, and flow distribution ratio of the two side outlets.

[0030] This utility model also provides a complete measurement method, including four core steps: S1: Installation and alignment: Install the measuring device near the oil slinger and adjust its position so that the inner collector 4 is precisely aligned with the fuel injection area of ​​the second row of holes 12 of the oil slinger and the outer collector 3 is precisely aligned with the fuel injection area of ​​the first row of holes 11 of the oil slinger, so as to ensure that the oil mist sprayed from both sides can be completely and without crosstalk guided into the corresponding collection channels respectively. S2: Start-up and fuel supply. Start the oil slinger to reach the preset speed, and then start supplying fuel to the oil slinger. The inner collector 4 and the outer collector 3 respectively collect the fuel atomized from the two side outlets and finally flow into the corresponding measuring cup 7.

[0031] S3: Fuel Cut-off and Emptying. After a predetermined time, the fuel supply is stopped, but the oil slinger continues to rotate for a period of time to use centrifugal force to completely throw the residual fuel in the device into the collector.

[0032] Specifically, after a predetermined period of stable fuel supply, the fuel supply system is first shut off to cut off the fuel supply. At this time, the motor continues to run without immediate power cut-off, allowing the slinger to continue rotating for approximately 30 seconds due to inertia. This design aims to use centrifugal force to completely eject the fuel remaining in the fuel lines, the slinger's cavity, and the channels, ensuring that all of it enters the collector and is measured by the measuring cup 7. This avoids residual fuel causing errors in the current measurement results or contaminating the next experiment.

[0033] S4: Measurement and Analysis. After the oil slinger stops, measure the amount of fuel flowing out of the outlets of the two collection channels respectively, and calculate and analyze the fuel flow rate and distribution of the double-row holes accordingly.

[0034] First, safely disconnect the motor power. Then, accurately record the fuel volume collected in the two measuring cups 7 or weigh its mass. Based on these two sets of data, the actual fuel flow rate and its ratio between the left and right drain holes of the oil slinger can be calculated, providing accurate and reliable data support for evaluating the uniformity of flow distribution, the consistency of atomization quality, and the working stability of the combustion chamber.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fuel flow measurement device with a double-row orifice oil slinger, characterized in that, The dual-row orifice oil slinger fuel flow measurement device includes: Support frame; An outer collector, which is mounted on the support frame; An inner collector is fixed inside the outer collector; both the outer collector and the inner collector include an oil collecting end and an outlet end, and the oil collecting end of the outer collector protrudes from the oil collecting end of the inner collector. The outer collector is close to the inner collector, and a fuel flow channel is left between them; the double-row hole oil slinger is in close contact with the inner collector. The second row of holes of the double-row hole oil slinger is located inside the oil collection end of the inner collector, and the first row of holes of the double-row hole oil slinger is located inside the oil collection end of the outer collector. One end of the double-row hole oil slinger is connected to a hollow shaft.

2. The fuel flow measurement device with a double-row orifice oil slinger as described in claim 1, characterized in that: The oil collecting ends of the outer collector and the inner collector are respectively provided with a first arc-shaped baffle and a second arc-shaped baffle; The inner edge of the first arc-shaped baffle is aligned with the left edge of the fuel injection trajectory of the first row of holes of the double-row-hole oil slinger; the inner edge of the second arc-shaped baffle is aligned with the left edge of the fuel injection trajectory of the second row of holes of the double-row-hole oil slinger; to ensure that the conical oil mist generated by the double rows of holes of the double-row-hole oil slinger is completely and independently introduced into the outer collector and the inner collector respectively.

3. The fuel flow measurement device with a double-row orifice oil slinger as described in claim 1, characterized in that: The support frame is used to adjust the relative position of the outer / inner collector and the double-row oil slinger.

4. The fuel flow measurement device with a double-row orifice oil slinger as described in claim 1, characterized in that: The inner collector and the outer collector are connected by fixing screws.

5. The fuel flow measurement device with a double-row orifice oil slinger as described in claim 1, characterized in that: The outer collector and the inner collector are cylindrical in shape, and both the outer collector and the inner collector are inclined downward from the oil collection end to the outlet end.

6. The fuel flow measurement device with a double-row orifice oil slinger as described in claim 1, characterized in that: It also includes two high-precision measuring cups, which are mounted on the support frame and located below the outlet ends of the outer collector and the inner collector, respectively.

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