A mixed fan-shaped test device with adjustable inner and outer area ratio

Abstract

The application provides a mixed fan-shaped test device with adjustable inner and outer area ratio, which comprises a cooling water jacket, a mixer inner casing and a mixer outer casing; one end of the cooling water jacket is connected with a mixer front mounting edge, and the other end is connected with a mixer rear mounting edge; the upper end surface of the cooling water jacket is provided with a cooling water jacket water outlet flange, and the lower end surface is provided with a cooling water jacket water inlet flange; the mixer outer casing is connected with the mixer rear mounting edge, and the mixer inner casing is connected with the mixer front mounting edge; a plurality of mixer adjusting pieces are arranged on the mixer inner casing, a connecting rod is arranged on each mixer adjusting piece, and a threaded pull rod is arranged on the connecting rod. The threaded pull rod is moved up and down to drive the mixer adjusting piece to rotate through the principle of three-hinge mechanism, the area of the inner and outer flow passages of the mixer outlet is changed, and the function of adjustable inner and outer area ratio is realized.

Description

Technical Field

[0001] This invention relates to a sector-shaped test device for a mixer with an adjustable inner and outer bypass area ratio, belonging to the field of afterburner for aero-engines. Background Technology

[0002] The mixer is mainly used in aero-engine turbofan engines. Its function is to mix the two airflows with different pressures, temperatures, and velocities, namely the inner and outer bypass streams. This mixing process reduces the speed and increases the pressure of the airflow, resulting in uniform airflow parameters that create favorable conditions for combustion in the afterburner. Compared to traditional aero-engine turbofan engines, its thermodynamic cycle remains constant, the main engine cycle parameters vary within a small range, and a mixer with a fixed inner and outer bypass area meets the engine's operational requirements. When conducting afterburner sector tests, only a fixed mixer structure is needed to meet the test requirements.

[0003] With the development of aero-engine technology, higher requirements have been placed on both overall performance and economy, leading to the emergence of variable cycle engines, which have become a focus of attention for major aviation powers. Variable cycle engines break with traditional engine design concepts, exhibiting excellent overall performance and economy across the entire engine envelope. This broadens the range of variation in the engine's main cycle parameters, rendering fixed-area mixers inadequate for operational requirements.

[0004] Therefore, a mixer with a variable inner and outer bypass area ratio has become an important technology to solve this problem. Thus, in the variable cycle afterburner sector test, in order to truly simulate the performance of the afterburner under different operating conditions, the inner and outer bypass area ratio of the mixer should be able to change with the change of the main engine cycle parameters. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a mixer sector test device with adjustable inner and outer culvert area ratio, which can meet the requirements for sector test of variable cycle afterburner.

[0006] The present invention is achieved through the following technical solutions.

[0007] This invention provides a fan-shaped test device for a mixer with an adjustable inner and outer duct area ratio, comprising a cooling water jacket, an inner mixer casing, and an outer mixer casing; one end of the cooling water jacket is connected to the front mounting edge of the mixer, and the other end is connected to the rear mounting edge of the mixer; the upper end face of the cooling water jacket is provided with a cooling water jacket outlet flange, and the lower end face is provided with a cooling water jacket inlet flange; the outer mixer casing is connected to the rear mounting edge of the mixer, and the inner mixer casing is connected to the front mounting edge of the mixer; the inner mixer casing is provided with multiple mixer adjusting plates, each mixer adjusting plate is provided with a connecting rod, and the connecting rod is provided with a threaded pull rod.

[0008] The inner casing of the mixer is connected to the front mounting edge of the mixer by bolts and self-locking nuts.

[0009] The front mounting edge of the mixer, the outlet flange of the cooling water jacket, the cooling water jacket, the rear mounting edge of the mixer, the inlet flange of the cooling water jacket, and the outer casing of the mixer constitute a closed cooling system.

[0010] The mixer inner casing is provided with a mounting hole, and the mixer adjusting plate is hinged to the mounting hole through a long shaft and a long shaft bushing, which is the first hinge point.

[0011] The mixer adjustment plate can rotate around the mounting hole.

[0012] The connecting rod is hinged to the mixer adjusting plate via a short shaft, a short shaft bushing, and a washer, which is the second hinge point.

[0013] The threaded tie rod is hinged to the connecting rod via a short shaft, a short shaft bushing, and a washer, forming the third hinge point.

[0014] The threaded tie rod is connected to the mixer outer casing via an adjusting nut and a clamping nut.

[0015] The moving distance of the threaded rod corresponds uniquely to the deflection angle of the mixer adjusting plate, and the threaded rod is provided with an angle scale for the deflection angle of the mixer adjusting plate.

[0016] The deflection angle range of the mixer adjustment plate is 0° to 30°.

[0017] The beneficial effects of this invention are as follows: by utilizing the principle of a three-hinge mechanism, the pull rod with threads moves up and down, driving the pull rod to rotate the mixer adjusting plate, thereby changing the area of ​​the inner and outer channels at the mixer outlet and realizing the function of adjustable inner and outer area ratio. Attached Figure Description

[0018] Figure 1 This is an exploded view of the present invention;

[0019] Figure 2 This is an isometric view of the present invention;

[0020] Figure 3 This is a schematic diagram of the drive mechanism of the present invention.

[0021] Figure 4 This is an isometric view of the mixer adjustment plate of the present invention;

[0022] Figure 5 This is an isometric view of the inner casing of the mixer of the present invention;

[0023] Figure 6 This is the right view of the present invention;

[0024] Figure 7This is a schematic diagram of the mixer adjustment plate of the present invention in the AA direction at 30°;

[0025] Figure 8 This is a schematic diagram of the mixer adjustment plate of the present invention at 0°.

[0026] Figure 9 This is a cross-sectional view along direction AA of the mixer adjustment plate of the present invention at 30°;

[0027] Figure 10 This is a cross-sectional view along direction AA when the mixer adjustment plate of the present invention is at 0°;

[0028] Figure 11 This is a schematic diagram showing the connection of the threaded tie rod, adjusting nut, and clamping nut;

[0029] In the diagram: 1-Mixer front mounting side, 2-Cooling water jacket outlet flange, 3-Cooling water jacket, 4-Mixer rear mounting side, 5-Cooling water jacket inlet flange, 6-Threaded tie rod, 7-Adjusting nut, 8-Pressure nut, 9-Mixer inner casing, 10-Mixer outer casing, 11-Mixer adjusting plate, 12-Connecting rod, 13-Bolt, 14-Self-locking nut, 15-Long shaft, 16-Long shaft bushing, 17-Short shaft, 18-Short shaft bushing, 19-Washer. Detailed Implementation

[0030] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0031] Example 1

[0032] like Figures 1-11 As shown, a fan-shaped test device for a mixer with an adjustable inner and outer duct area ratio includes a cooling water jacket 3, an inner mixer casing 9, and an outer mixer casing 10. One end of the cooling water jacket 3 is connected to the front mounting edge 1 of the mixer, and the other end is connected to the rear mounting edge 4 of the mixer. The upper end face of the cooling water jacket 3 is provided with a cooling water jacket outlet flange 2, and the lower end face is provided with a cooling water jacket inlet flange 5. The outer mixer casing 10 is connected to the rear mounting edge 4 of the mixer, and the inner mixer casing 9 is connected to the front mounting edge 1 of the mixer. The inner mixer casing 9 is provided with multiple mixer adjusting plates 11, each mixer adjusting plate 11 is provided with a connecting rod 12, and the connecting rod 12 is provided with a threaded pull rod 6.

[0033] The inner casing 9 of the mixer is connected to the front mounting edge 1 of the mixer by bolts 13 and self-locking nuts 14.

[0034] The front mounting side 1 of the mixer, the outlet flange 2 of the cooling water jacket, the cooling water jacket 3, the rear mounting side 4 of the mixer, the inlet flange 5 of the cooling water jacket, and the outer casing 10 of the mixer constitute a closed cooling system.

[0035] The inner casing 9 of the mixer is provided with a mounting hole, and the mixer adjusting plate 11 is hinged to the mounting hole through the long shaft 15 and the long shaft bushing 16, which is the first hinge point.

[0036] The mixer adjustment plate 11 can rotate around the mounting hole.

[0037] The connecting rod 12 is hinged to the mixer adjusting plate 11 via a short shaft 17, a short shaft bushing 18, and a washer 19, which is the second hinge point.

[0038] The threaded tie rod 6 is hinged to the connecting rod 12 via a short shaft 17, a short shaft bushing 18, and a washer 19, which is the third hinge point.

[0039] The threaded pull rod 6 is connected to the mixer outer casing 10 via adjusting nut 7 and clamping nut 8.

[0040] The moving distance of the threaded pull rod 6 and the deflection angle of the mixer adjusting plate 11 are uniquely correlated, that is, one moving distance corresponds to one deflection angle.

[0041] The threaded pull rod 6 is provided with an angular scale for the deflection angle of the mixer adjustment plate 11, making the deflection angle of the mixer adjustment plate 11 visible.

[0042] The deflection angle range of the mixer adjustment plate 11 is 0° to 30°.

[0043] Furthermore, by tightening the adjusting nut 7, the threaded pull rod 6 can be moved up and down, thereby driving the connecting rod 6 to drive the mixer adjusting plate 11 to rotate. The moving distance of the pull rod 6 and the deflection angle of the mixer adjusting plate 11 are uniquely correlated, so that the mixer adjusting plate can be infinitely adjusted in the range of 0° to 30°, which can meet the usage requirements of the bypass ratio in the range of 0.2 to 1.5 and meet the requirements of the variable cycle afterburner sector test.

[0044] Example 2

[0045] like Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 8 The inner casing 9 of the mixer is fixed to the front mounting side 1 of the mixer by bolts 13 and self-locking nuts 14. Mounting holes are provided on it to provide mounting positions for the mixer adjusting plate 11.

[0046] Specifically, by using the mixer adjusting plate 11 to deflect at different angles to change the area of ​​the inner and outer channels at the mixer outlet, the function of adjusting the ratio of inner and outer areas can be achieved.

[0047] like Figure 1 , Figure 2 , Figure 7 and Figure 8The front mounting side 1 of the mixer, the outlet flange 2 of the cooling water jacket, the cooling water jacket 3, the rear mounting side 4 of the mixer, the inlet flange 5 of the cooling water jacket, and the outer casing 10 of the mixer form a closed cooling system. Cooling water enters from the inlet flange 5 of the cooling water jacket and flows out from the outlet flange 2 of the cooling water jacket, carrying away excess heat from the outer casing 10 of the mixer and reducing the operating temperature of the outer casing 10 of the mixer so that its operating temperature does not exceed the allowable operating temperature.

[0048] like Figure 1 , Figure 4 , Figure 7 , Figure 8 , Figure 10 and Figure 11 The mixer adjusting plate 11 is hinged to the inner casing 9 of the mixer via a long shaft 15 and a long shaft bushing 16, and can rotate around the mounting hole to achieve the function of adjustable inner and outer area ratio.

[0049] Furthermore, the mixer regulating plate 11 optimizes the gap with the mixer inner casing 9, and the external low-temperature air flows out from the gap to wrap around the mixer regulating plate 11, forming a cooling air film so that its operating temperature does not exceed the allowable operating temperature.

[0050] Specifically, the mixer regulating plate 11 and the mixer inner casing 9 are designed with topology optimization according to the operating conditions, and local structural reinforcement is carried out to meet the usage requirements.

[0051] Specifically, there are three mixer adjustment plates 11, which are evenly distributed circumferentially.

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The following components form a three-hinge mechanism with an adjustable ratio of inner and outer casing area: threaded pull rod 6, adjusting nut 7, clamping nut 8, inner casing 9, outer casing 10, adjusting plate 11, connecting rod 12, bolt 13, self-locking nut 14, long shaft 15, long shaft bushing 16, short shaft 17, short shaft bushing 18, and washer 19. The long shaft 15 and long shaft bushing 16 hinge the adjusting plate 11 to the inner casing 9, forming the first hinge point; the short shaft 17 and short shaft bushing 18 hinge the connecting rod 12 to the adjusting plate 11, forming the second hinge point; and the short shaft 17, short shaft bushing 18, and washer 19 hinge the threaded pull rod 6 to the connecting rod 12, forming the third hinge point.

[0053] Specifically, using the principle of a three-hinge mechanism, the threaded rod 6 moves up and down, driving the connecting rod 12 to rotate the mixer adjusting plate 11, thereby changing the area of ​​the inner and outer culverts at the mixer outlet and realizing the function of adjustable inner and outer culvert area ratio.

[0054] Furthermore, by utilizing the three-hinge-point limiting principle, after the mixer adjusting plate 11 is adjusted to the design requirements, the threaded pull rod 6 is locked. The three hinge points are fixed so that the mixer adjusting plate 11 does not rotate under the action of pneumatic force, thus ensuring stable operation.

[0055] Furthermore, the threaded pull rod 6 is fixed to the outer casing 10 of the mixer via the adjusting nut 7 and the clamping nut 8. By tightening the adjusting nut 7, the threaded pull rod 6 can move up and down, thereby driving the connecting rod 12 to drive the mixer adjusting plate 11 to rotate, thus realizing the function of adjustable inner and outer duct area ratio of the mixer outlet. At the same time, the three-hinge point limiting principle is used, that is, after the mixer adjusting plate is adjusted to the design requirements, the threaded pull rod is locked. The three hinge points are fixed so that the mixer adjusting plate does not rotate under the action of aerodynamic force, thus ensuring stable operation.

[0056] In summary, this invention differs from traditional mixers. This invention can change the ratio of the inner and outer duct area at the outlet according to different operating conditions, and can be infinitely adjusted between 0° and 30° to meet the requirements for use within the duct ratio range of 0.2 to 1.5, and meet the requirements for the sector test of the variable cycle afterburner.

Claims

1. A sector-shaped test device for a mixer with an adjustable inner and outer duct area ratio, comprising a cooling water jacket (3), an inner mixer casing (9), and an outer mixer casing (10), characterized in that: One end of the cooling water jacket (3) is connected to the front mounting edge (1) of the mixer, and the other end is connected to the rear mounting edge (4) of the mixer; the upper end face of the cooling water jacket (3) is provided with a cooling water jacket outlet flange (2), and the lower end face is provided with a cooling water jacket inlet flange (5); the outer casing (10) of the mixer is connected to the rear mounting edge (4) of the mixer, and the inner casing (9) of the mixer is connected to the front mounting edge (1) of the mixer; the inner casing (9) of the mixer is provided with multiple mixer adjusting plates (11), each mixer adjusting plate (11) is provided with a connecting rod (12), and the connecting rod (12) is provided with a threaded pull rod (6); The mixer inner casing (9) is provided with a mounting hole. The mixer adjusting plate (11) is hinged to the mounting hole through a long shaft (15) and a long shaft bushing (16), which is the first hinge point. The mixer adjusting plate (11) can rotate around the mounting hole. The connecting rod (12) is hinged to the mixer adjusting plate (11) through a short shaft (17), a short shaft bushing (18) and a washer (19), which is the second hinge point. The threaded pull rod (6) is hinged to the connecting rod (12) through a short shaft (17), a short shaft bushing (18) and a washer (19), which is the third hinge point. The threaded pull rod (6) is connected to the mixer outer casing (10) through an adjusting nut (7) and a clamping nut (8).

2. The adjustable culvert area ratio mixer sector test device as described in claim 1, characterized in that: The inner casing (9) of the mixer is connected to the front mounting edge (1) of the mixer by bolts (13) and self-locking nuts (14).

3. The adjustable culvert area ratio mixer sector test device as described in claim 1, characterized in that: The front mounting side (1) of the mixer, the outlet flange (2) of the cooling water jacket, the cooling water jacket (3), the rear mounting side (4) of the mixer, the inlet flange (5) of the cooling water jacket, and the outer casing (10) of the mixer form a closed cooling system.

4. The adjustable culvert area ratio mixer sector test device as described in claim 1, characterized in that: The moving distance of the threaded rod (6) is uniquely related to the deflection angle of the mixer adjustment plate (11), and the threaded rod (6) is provided with an angle scale for the deflection angle of the mixer adjustment plate (11).

5. The adjustable culvert area ratio mixer sector test device as described in claim 1, characterized in that: The deflection angle range of the mixer adjustment plate (11) is 0°~30°.

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