An apparatus for testing fuel manifold flow and individual nozzle flow and atomization

Abstract

The utility model provides a kind of device for testing fuel main pipe flow and single nozzle flow and atomization, the device for testing fuel main pipe flow and single nozzle flow and atomization includes: tooling, the tooling includes rigid base and nozzle mounting seat, the nozzle mounting seat is detachably installed on rigid base, when using, it can be taken off alone to carry out single nozzle flow and atomization test, and fuel main pipe and direct jet nozzle overall can also be assembled to carry out fuel flow unevenness test;Direct jet nozzle, the direct jet nozzle is installed on nozzle mounting seat;Fuel main pipe assembly, the fuel main pipe assembly is connected with direct jet nozzle, so that fuel tester equipment can test new model aeroengine fuel main pipe and nozzle test, realize fuel main pipe overall flow test and single nozzle flow and atomization test mode switching, improve the versatility of tester, simple operation, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aviation engine fuel system testing technology, and is a device for testing the flow rate of the fuel main and the flow rate and atomization of individual nozzles. Background Technology

[0002] The performance and reliability of an aero-engine largely depend on the accuracy and efficiency of the fuel supply system. As the core components of the fuel system, the uniformity of flow distribution and atomization quality of the fuel manifold and nozzles directly affect the working stability of the engine. During the research, development, testing, and final production stages of aero-engines, the fuel manifold and nozzles need to undergo rigorous testing. Among these tests, the flow distribution test of the manifold and the flow and atomization performance test of the nozzles are the most important test items.

[0003] However, existing fuel testers have certain limitations and are difficult to adapt to the testing requirements of fuel manifolds and nozzles of newly added aero-engine models. Furthermore, different specialized equipment or complex modifications are usually required when conducting manifold flow tests and individual nozzle tests. The test mode switching is cumbersome, resulting in low versatility of the tester and reduced testing efficiency. Utility Model Content

[0004] This invention addresses the limitations of existing fuel testers, which are difficult to adapt to the testing requirements of new types of aircraft engine fuel manifolds and nozzles. Furthermore, different specialized equipment or complex modifications are usually required when conducting manifold flow tests and individual nozzle tests, and the switching of test modes is cumbersome, resulting in low versatility of the tester and reduced testing efficiency. Therefore, this invention provides a device for testing fuel manifold flow, individual nozzle flow, and atomization.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0006] This utility model provides a device for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle. The device for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle includes:

[0007] The tooling includes a rigid base and a nozzle mounting seat. The nozzle mounting seat is detachably mounted on the rigid base. In use, it can be removed individually for flow and atomization tests of a single nozzle, or it can be assembled to conduct fuel flow non-uniformity tests on the entire fuel main and direct injection nozzles.

[0008] A direct-fire nozzle, which is mounted on a nozzle mounting base;

[0009] A fuel manifold assembly connected to a direct injection nozzle.

[0010] Furthermore, the number of nozzle mounting seats is six, and the six nozzle mounting seats are arranged in a ring on the tooling surface.

[0011] Furthermore, the rigid base has mounting holes at its bottom.

[0012] Furthermore, the nozzle orifice of the direct-fire nozzle faces into the nozzle mounting hole of the nozzle mounting base, and the nozzle orifice of the direct-fire nozzle is inserted perpendicularly to the mounting surface of the tooling.

[0013] Furthermore, the angle deviation between the center line of the mist cone atomized by the direct nozzle and the center line of the nozzle is ≤1.5°. In the single nozzle test, the spray cone angle is measured by taking any two mutually perpendicular vertical planes, and the deviation is ≤5°.

[0014] Furthermore, the fuel manifold assembly includes a connecting nut, a fuel manifold, an interface fixture, and an inlet port. The fuel manifold is connected to the external threaded connector protruding from the nozzle mounting seat via the nut. The fuel manifold is connected to the inlet port, which is mounted on the bottom side of the interface fixture.

[0015] Furthermore, the fuel main nozzle head is in full contact with the concave surface of the direct injection nozzle.

[0016] Furthermore, the interface fixture is fixedly connected to the rigid base by hexagonal screws.

[0017] Furthermore, the number of fuel mains is six, and the end of each fuel main is connected to the fuel inlet.

[0018] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0019] The positive and progressive effects of this utility model are as follows:

[0020] The aforementioned device for testing the flow rate of the fuel main and individual nozzles, as well as atomization, can be disassembled for individual nozzle flow and atomization tests, or assembled to conduct fuel flow non-uniformity tests on the entire fuel main and direct-fire nozzles. This allows the fuel testing equipment to test the fuel main and nozzles of newly added aero-engine models, enabling switching between overall fuel main flow testing and individual nozzle flow and atomization testing modes. This improves the versatility of the testing equipment, simplifies operation, increases testing efficiency, and enhances its overall functionality. Furthermore, its reasonable structural design, convenient maintenance, and low overall cost make it a promising candidate for widespread application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 application.

[0022] Figure 1 This is a three-dimensional structural diagram of the device for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle according to this utility model.

[0023] Figure 2 This is a schematic diagram of the direct nozzle structure of the device for testing the flow rate of the fuel main and the flow rate of a single nozzle and atomization according to this utility model.

[0024] Figure 3 This is a schematic diagram of the main structure of the device for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle according to this utility model.

[0025] Figure 4 This is a side view of the device for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle according to this utility model.

[0026] Figure 5 This is a bottom-view structural diagram of the device for testing the flow rate of the fuel main and individual nozzles and atomization according to this utility model.

[0027] Explanation of reference numerals in the attached figures

[0028] 1. Tooling; 11. Rigid base; 12. Nozzle mounting base; 2. Fuel main pipe assembly; 21. Connecting nut; 22. Fuel main pipe; 23. Interface tooling; 24. Fuel inlet port; 3. Direct injection nozzle. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0031] like Figure 1-5As shown, the device for testing the flow rate of the fuel main and individual nozzles, as well as atomization, includes: a fixture 1, which includes a rigid base 11 and a nozzle mounting base 12. The nozzle mounting base 12 is detachably mounted on the rigid base 11. In use, it can be removed individually for single-nozzle flow and atomization tests, or it can be assembled to perform a fuel flow non-uniformity test on the fuel main 22 and direct-injection nozzle 3 as a whole; a direct-injection nozzle 3, which is mounted on the nozzle mounting base 12; and a fuel main 22 assembly 2, which is connected to the direct-injection nozzle 3. This allows the fuel testing equipment to test the fuel main 22 and nozzles of newly added aero-engine models, enabling switching between overall fuel main 22 flow test and individual nozzle flow and atomization test modes. This improves the versatility of the testing equipment, simplifies operation, increases testing efficiency, and enhances the overall versatility of the fuel testing equipment. The equipment also features a reasonable structural design, convenient maintenance, low overall cost, and promising prospects for widespread application.

[0032] The number of nozzle mounting seats 12 is six, and the six nozzle mounting seats 12 are arranged in a ring on the surface of the tooling 1.

[0033] The rigid base 11 has mounting holes at its bottom.

[0034] The nozzle orifice of the direct-fire nozzle 3 faces the nozzle mounting hole of the nozzle mounting base 12, and the nozzle orifice of the direct-fire nozzle 3 is inserted perpendicularly to the mounting surface of the tooling 1.

[0035] The angle deviation between the center line of the mist cone atomized by the direct-fire nozzle 3 and the center line of the nozzle outlet is ≤1.5°. In the single-nozzle test, the spray cone angle is measured by taking any two mutually perpendicular vertical planes, and the deviation is ≤5°.

[0036] The mounting base can be removed separately. When conducting flow and atomization tests on a single nozzle, align the nozzle orifice of the direct nozzle 3 with the nozzle mounting hole of the nozzle mounting base 12. Connect the nozzle outlet to the tester's return oil pipe and the nozzle inlet to the tester's supply oil pipe. Then, fix the nozzle mounting base 12 on the tester bracket, tighten the tooling 1 by rotating the nut, adjust the tester's oil supply pressure to the specified value, and observe for fuel leakage. If there is no leakage, record the flow data after 3 minutes. At the same time, observe the atomization. The requirements are that the angle deviation between the center line of the mist cone and the center line of the nozzle should be ≤1.5°, the spray cone angle deviation measured by any two mutually perpendicular vertical planes should be ≤5°, and the fuel spray quality should not have any streaks upon visual inspection.

[0037] The fuel main pipe assembly 22 includes a connecting nut 21, a fuel main pipe 22, an interface fixture 231, and an inlet port 24. The fuel main pipe 22 is connected to the external threaded connector protruding from the nozzle mounting seat 12 via the nut. The fuel main pipe 22 is connected to the inlet port 24, which is installed on the bottom side of the interface fixture 231.

[0038] When the six nozzle mounting seats 12 are assembled on the rigid base 11, a fuel flow non-uniformity test can be performed on the fuel main pipe 22 and the direct injection nozzle 3. During the test, the nozzle orifice is placed facing the nozzle mounting hole of the fuel main pipe 22 flow test fixture 1, perpendicular to the mounting surface of the fixture 1. The six clamping nuts on the fuel main pipe 22 are aligned with the protruding external threaded joints of the six mounting seats on the fuel main pipe 22 flow test fixture 1. The sleeve nuts on the fuel main pipe 22 are tightened symmetrically with a 3 / 8” open wrench to ensure that the nozzle head of the fuel main pipe 22 is in full contact with the concave surface of the direct injection nozzle 3. Then, the six return oil pipes of the fuel tester are installed on the six oil outlet ports on the back of the fuel tester. The fuel main pipe 22 inlet port 24 fixture 231 is fixed to the rigid base 11 with two M5 hexagon socket screws. Then, the fuel tester inlet pipe port is installed on the other end of the fuel main pipe 22 port fixture 231. Finally, the flow test is performed according to the pressure given in the technical requirements.

[0039] The nozzle head of the fuel main 22 is in full contact with the concave surface of the direct injection nozzle 3.

[0040] The interface fixture 231 is fixedly connected to the rigid base 11 by an internal hex screw.

[0041] The number of fuel mains 22 is six, and the end of each fuel main is connected to the fuel inlet 24.

[0042] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0043] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. An apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle, characterized in that, The device for testing the fuel main flow rate, individual nozzle flow rate, and atomization includes: The tooling (1) includes a rigid base (11) and a nozzle mounting seat (12). The nozzle mounting seat (12) is detachably mounted on the rigid base (11). When in use, it can be removed individually to perform flow and atomization tests on a single nozzle, or it can be assembled to perform fuel flow non-uniformity tests on the fuel main pipe (22) and the direct injection nozzle (3) as a whole. A direct-fire nozzle (3) is mounted on a nozzle mounting base (12); Fuel manifold assembly (2), which is connected to direct injection nozzle (3).

2. The apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle as described in claim 1, characterized in that: The number of nozzle mounting seats (12) is six, and the six nozzle mounting seats (12) are arranged in a ring on the surface of the tooling (1).

3. The apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle as described in claim 1, characterized in that: The rigid base (11) has mounting holes at its bottom.

4. The apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle as described in claim 1, characterized in that: The nozzle orifice of the direct-fire nozzle (3) faces the nozzle mounting hole of the nozzle mounting base (12), and the nozzle orifice of the direct-fire nozzle (3) is inserted perpendicularly to the mounting surface of the tooling (1).

5. The apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle as described in claim 1, characterized in that: The angle deviation between the center line of the mist cone atomized by the direct nozzle (3) and the center line of the nozzle is ≤1.5°. In the single nozzle test, the spray cone angle is measured by taking two mutually perpendicular vertical planes, and the deviation is ≤5°.

6. The apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle as described in claim 1, characterized in that: The fuel manifold assembly (2) includes a connecting nut (21), a fuel manifold (22), an interface fixture (23), and an inlet port (24). The fuel manifold (22) is connected to the external threaded connector protruding from the nozzle mounting seat (12) via a nut. The fuel manifold (22) is connected to the inlet port (24), and the inlet port (24) is installed on the bottom side of the interface fixture (23).

7. The apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle as described in claim 6, characterized in that: The nozzle head of the fuel main (22) is in full contact with the concave surface of the direct injection nozzle (3).

8. The apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle as described in claim 6, characterized in that: The interface fixture (23) is fixedly connected to the rigid base (11) by an internal hex screw.

9. The apparatus for testing the flow rate of the fuel main and the flow rate and atomization of a single nozzle as described in claim 6, characterized in that: The number of fuel mains (22) is six, and the end of the fuel mains (22) is connected to the fuel inlet (24).

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