An exhaust ejecting structure capable of realizing stepless adjustment of an ejecting ratio

Abstract

The application provides an exhaust injection structure capable of realizing stepless adjustment of an injection ratio, and belongs to the technical field of impeller machines or aero-engine test. The exhaust injection structure comprises an exhaust cylinder, an injection cylinder and an injection ratio adjustment structure. The injection ratio adjustment structure comprises a static plate assembly and a plurality of adjustment dynamic plates. The static plate assembly is fixedly arranged at the leading edge of the injection cylinder. The plurality of adjustment dynamic plates are uniformly arranged in the circumferential direction of the center of the static plate assembly. The adjustment dynamic plates can slide relative to the static plate assembly in the radial direction. A plurality of circular-arc passage areas for adjusting the injection ratio are formed between the adjustment dynamic plates and the exhaust cylinder. Compared with the automatic adjustment mechanism in the prior art, the exhaust injection structure of the application can realize stepless adjustment of the exhaust injection ratio in the case that the adjustment mechanism fails to be processed. The structure is simple, reliable in operation, the arrangement and position consistency of the adjustment dynamic plates are good, and the circumferential uniformity of the injection airflow is ensured.

Description

Technical Field

[0001] This application belongs to the field of turbomachinery / aircraft engine testing technology, and specifically relates to an exhaust ejector structure that can achieve stepless adjustment of the ejector ratio. Background Technology

[0002] When conducting tests on turbine components or ground tests on the entire aero-engine / gas turbine, it is necessary to adjust the ejector ratio at the outlet to achieve changes in the outlet state.

[0003] Existing technologies adjust the ejector ratio by using either plug-in or open ejectors to control the outlet airflow. However, these methods rely on complex automatic ejector ratio adjustment mechanisms. While these mechanisms can adjust the ejector ratio, they suffer from the following drawbacks:

[0004] 1) The design and debugging cycle of the automatic ejector ratio adjustment mechanism is too long, which often makes it difficult to meet the timeliness requirements;

[0005] 2) The automatic ejector ratio adjustment mechanism has a complex control system and insufficient reliability.

[0006] 3) The cost of the automatic ejector ratio adjustment mechanism is high, which increases the cost of testing. Summary of the Invention

[0007] The purpose of this application is to provide an exhaust ejector structure that enables stepless adjustment of the ejector ratio, in order to solve or mitigate at least one of the problems in the prior art.

[0008] The technical solution of this application is: an exhaust ejector structure capable of stepless adjustment of the ejector ratio, the exhaust ejector structure comprising:

[0009] Exhaust pipe;

[0010] ejector tube; and

[0011] An ejector ratio adjustment structure includes a stationary plate assembly and multiple adjusting movable plates. The stationary plate assembly is fixedly disposed at the front edge of the ejector tube, and the multiple adjusting movable plates are evenly arranged circumferentially around the center of the stationary plate assembly. The adjusting movable plates can slide relative to the stationary plate assembly in the radial direction, and a multi-arc channel area for ejector ratio adjustment is formed between the adjusting movable plates and the exhaust tube.

[0012] Furthermore, both the exhaust pipe and the ejector tube have a gradually increasing conical structure. The ejector tube at least partially covers the exhaust pipe, and the ejector tube has a uniformly enlarged diameter compared to the exhaust pipe, thereby forming a uniform gap between the ejector tube and the exhaust pipe.

[0013] Furthermore, the stationary plate assembly includes an annular stationary plate and several triangular slide plates. The annular stationary plate is fixedly mounted on the front edge of the ejector tube. The triangular slide plates are fixedly connected to the annular stationary plate via connectors. The triangular slide plates are evenly distributed circumferentially around the center of the annular stationary plate, with one vertex pointing towards the center, thereby forming an installation space for the adjusting plate between two adjacent triangular slide plates. The sides of the triangular slide plates pointing towards the center form guide sides, guiding the radial movement of the adjusting plate.

[0014] Furthermore, the number of the triangular slide plates is the same as the number of the adjusting plates.

[0015] Furthermore, the adjustable plates are configured to be six or eight.

[0016] Furthermore, the triangular slide plate is an isosceles triangle, and the vertex between the two equal sides of the isosceles triangle points to the center of the circle, so that the two equal sides of the triangular slide plate form the guide sides for adjusting the sliding of the movable plate.

[0017] Furthermore, the height of the triangular slide plate is greater than the radial width of the annular stationary plate, and the bottom edge of the triangular slide plate overlaps with the outer edge of the annular stationary plate.

[0018] Furthermore, the guide edge of the triangular slide plate is provided with graduations.

[0019] Furthermore, the adjusting plate is a petal-shaped structure composed of two concentric arcs and parallel sides. The adjusting plate has strip holes parallel to the sides. By passing a connector through the strip holes and the through holes provided on the annular stationary plate, the radial position adjustment of the adjusting plate relative to the stationary plate assembly can be achieved.

[0020] Furthermore, the adjusting plate is provided with three strip-shaped holes, which are distributed on both sides and the middle of the adjusting plate.

[0021] Compared with the automatic adjustment mechanism in the prior art, the exhaust ejector structure of this application can achieve stepless adjustment of the exhaust ejector ratio in the event of failure of the adjustment mechanism. The structure is simple, reliable in operation, and the arrangement and position of the adjustment plate are consistent, ensuring the circumferential uniformity of the ejector airflow. Attached Figure Description

[0022] To more clearly illustrate the technical solutions provided in this application, the accompanying drawings will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application.

[0023] Figure 1 This is a schematic diagram of the exhaust ejector structure in this application.

[0024] Figure 2 This is a schematic diagram showing the positions of the stationary plate assembly and the adjusting moving plate in this application.

[0025] Figure 3 This is a schematic diagram of the static plate assembly in this application.

[0026] Figure 4 This is a schematic diagram of the adjusting plate in this application.

[0027] Figure 5 This is a schematic diagram showing the connection between the stationary plate assembly and the adjusting moving plate in this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0029] In order to overcome the problems of long design cycle, complex control system and high cost of existing automatic ejector ratio adjustment mechanisms, this application proposes an exhaust ejector structure that is simple in structure, reliable in operation and low in cost, and can realize stepless adjustment of ejector ratio.

[0030] like Figure 1 As shown, the exhaust ejector structure provided in this application includes: an exhaust pipe 1, an ejector tube 2, and an ejector ratio adjustment structure 3. Both the exhaust pipe 1 and the ejector tube 2 are generally tapered structures with gradually increasing diameters. The ejector tube 2 covers the middle and rear side of the exhaust pipe 1, and the ejector tube 2 has a uniformly enlarged diameter compared to the exhaust pipe 1, thereby forming a roughly uniform gap G between the ejector tube 2 and the exhaust pipe 1. The ejector ratio adjustment structure 3 is fixed to the leading edge of the ejector tube 2 and can be adjusted radially, so that the ejected airflow Q2 entering the gap G can flow through and mix with the main airflow Q1 flowing from the exhaust pipe 1 to form a mixed airflow Q3.

[0031] like Figure 2 As shown, the ejector ratio adjustment structure 3 includes a stationary plate assembly 32 and a plurality of adjusting movable plates 31. The plurality of adjusting movable plates 31 are evenly arranged circumferentially around the center of the stationary plate assembly 32, and the adjusting movable plates 31 are capable of sliding relative to the stationary plate assembly 32 in the radial direction. In some embodiments of this application, the adjusting movable plates 31 may be set to six or eight. For example, in the embodiment illustrated in this application, there are six adjusting movable plates 31.

[0032] Specifically, such as Figure 3As shown, the stationary plate assembly 32 includes an annular stationary plate 33 and several triangular slide plates 34. The annular stationary plate 33 is welded onto the leading edge of the ejector tube 2, and the triangular slide plates 34 are fixedly connected to the annular stationary plate 33 via connectors. The number of triangular slide plates 34 is the same as the number of adjusting plates 31. The triangular slide plates 34 are evenly distributed circumferentially around the center of the annular stationary plate 33, with any vertex pointing towards the center, thus forming an installation space for the adjusting plate 31 between two adjacent triangular slide plates 34. The sides of the triangular slide plates 34 pointing towards the center form guide sides, guiding the radial movement of the adjusting plate 31.

[0033] like Figure 4 and Figure 5 As shown, the adjusting plate 31 is petal-shaped, consisting of two concentric arcs and parallel sides. It has strip-shaped holes 35 parallel to the sides. By connecting a member through the strip-shaped holes 35 and the through holes on the annular stationary plate 33, the radial position of the adjusting plate 31 relative to the stationary plate assembly 32 can be adjusted, thereby adjusting the ejection ratio. In this embodiment of the application, the adjusting plate 31 has three strip-shaped holes 35, distributed on both sides and in the middle, for the connecting member to fix it to the stationary plate assembly 33.

[0034] In a preferred embodiment of this application, the triangular slide plate 34 in the stationary plate assembly 32 is an isosceles triangle, with the vertex between its two equal sides pointing to the center of the circle, so that the two equal sides of the triangular slide plate 34 form the guide sides for adjusting the sliding of the movable plate 31.

[0035] Furthermore, the height of the triangular slide plate 34 is greater than the radial width of the annular stationary plate 33, and the bottom edge of the triangular slide plate 34 is set to overlap with the outer edge of the annular stationary plate 33, so that the vertex of the triangular slide plate 34 extends beyond the inner edge of the annular stationary plate 33.

[0036] In a preferred embodiment of this application, a scale is provided on the guide edge of the triangular slide plate 34, thereby ensuring that the radial positions of the multiple adjusting plates 31 on the stationary plate assembly 32 have good consistency.

[0037] In the exhaust ejector structure provided in this application, the ejector ratio is adjusted by moving the adjusting plate 31 and the exhaust pipe 1 to form a multi-arc channel area. The multi-arc channel area is adjusted by radially sliding the adjusting plate 31, thereby adjusting the distance between it and the exhaust pipe 1. After moving the adjusting plate 31 to the desired position, the positioning is achieved by tightening the connecting piece that passes through the bolt holes on the stationary plate assembly 32 and the strip hole on the adjusting plate 31.

[0038] Compared with the automatic adjustment mechanism in the prior art, the exhaust ejector structure of this application can achieve stepless adjustment of the exhaust ejector ratio in the event of failure of the adjustment mechanism. The structure is simple, reliable in operation, and the arrangement and position of the adjustment plate are consistent, ensuring the circumferential uniformity of the ejector airflow.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An exhaust-ejection structure capable of realizing stepless adjustment of an ejection ratio, characterized by comprising: The exhaust ejector structure includes: Exhaust pipe (1); The ejector tube (2), the exhaust tube (1) and the ejector tube (2) are both generally tapered structures that gradually increase in size. The ejector tube (2) at least partially covers the exhaust tube (1), and the ejector tube (2) has a uniformly enlarged diameter compared to the exhaust tube (1), thereby forming a uniform gap (G) between the ejector tube (2) and the exhaust tube (1); and The ejection ratio adjustment structure (3) includes a stationary plate assembly (32) and multiple adjusting moving plates (31). The stationary plate assembly (32) is fixedly disposed on the front edge of the ejector tube (2). The multiple adjusting moving plates (31) are evenly arranged circumferentially around the center of the stationary plate assembly (32). The adjusting moving plates (31) can slide relative to the stationary plate assembly (32) in the radial direction. A multi-arc channel area for ejection ratio adjustment is formed between the adjusting moving plates (31) and the exhaust pipe (1). The stationary plate assembly (32) includes an annular stationary plate (33) and several triangular slide plates (34). The annular stationary plate (33) is fixedly mounted on the front edge of the ejector tube (2). The triangular slide plates (34) are connected to the annular stationary plate (33) by means of connectors. The fixed plate (33) is fixedly connected, wherein the triangular slide plate (34) is evenly distributed around the center of the annular fixed plate (33), with one vertex pointing to the center, thereby forming an installation space for the adjusting plate (31) between two adjacent triangular slide plates (34). The sides of the vertex pointing to the center in the triangular slide plate (34) form guide sides to guide the movement of the adjusting plate (31) in the radial direction. The adjusting plate (31) is a petal-shaped structure composed of two arcs with the same center and parallel sides. The adjusting plate (31) has a strip hole (35) parallel to the side. By passing the connector through the strip hole (35) and the through hole provided on the annular fixed plate (33), the radial position adjustment of the adjusting plate (31) relative to the fixed plate assembly (32) can be realized.

2. The exhaust-ejection structure capable of stepless adjustment of ejection ratio according to claim 1, characterized in that, The number of triangular slide plates (34) is the same as the number of adjusting plates (31).

3. The exhaust-ejection structure capable of stepless adjustment of ejection ratio according to claim 2, characterized in that, The adjusting plates (31) are configured to be six or eight.

4. The exhaust-ejection structure capable of stepless adjustment of ejection ratio according to claim 2, characterized in that, The triangular slide plate (34) is an isosceles triangle. The vertex between the two equal sides of the isosceles triangle points to the center of the circle, so that the two equal sides of the triangular slide plate (34) form the guiding sides for the sliding of the adjusting plate (31).

5. The exhaust-ejection structure capable of stepless adjustment of ejection ratio according to claim 2 or 4, characterized in that, The height of the triangular slide plate (34) is greater than the radial width of the annular stationary plate (33), and the bottom edge of the triangular slide plate (34) overlaps with the outer edge of the annular stationary plate (33).

6. The exhaust ejector structure capable of stepless adjustment of the ejector ratio as described in claim 1, characterized in that, The guide edge of the triangular slide plate (34) is marked with scale.

7. The exhaust ejector structure capable of stepless adjustment of the ejector ratio as described in claim 1, characterized in that, The adjusting plate (31) is provided with three strip holes (35), which are distributed on both sides and the middle of the adjusting plate (31).

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