Cartridge receiver mounting structure

Abstract

The invention relates to the technical field of aero-engines, and provides a cartridge receiver mounting structure which comprises a plurality of mounting parts, a combustion chamber cartridge receiver and a shock absorber, the mounting parts are arranged on the combustion chamber cartridge receiver according to the preset circumferential direction, the adjacent mounting parts are connected with each other, and each mounting part is provided with a plurality of weight reduction grooves and connecting holes. The weight reduction grooves are evenly distributed in the mounting part, the connecting holes are located in the edge area of the mounting part, the connecting part of the shock absorber is matched with the connecting holes, a plurality of force transmission ribs are formed between the weight reduction grooves, a plurality of first annular ribs are formed between the weight reduction grooves and the adjacent connecting holes, and the force transmission ribs are connected with the first annular ribs. The installation parts are located on the same face, the multiple installation parts jointly support the engine, the failure of any installation part cannot cause the failure of the installation function of the engine, and therefore the installation failure risk of the engine is reduced. The weight reduction grooves, the force transmission ribs and the annular ribs are reasonably arranged, so that the strength of the mounting part can be improved, and the mass of the mounting part is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engines, and in particular relates to a casing installation structure. Background Art

[0002] Aircraft engines have high requirements for mounting joints. On the one hand, the mounting joints need to have high strength to bear the load of the engine. On the other hand, the mounting joints need to reduce the mass as much as possible to meet the requirements of engine weight reduction. Existing aircraft engines usually use two or more mounting planes, and each mounting plane is provided with several mounting joints, and the engine is installed on the aircraft through these mounting joints. These mounting joints can bear the load from the engine without harmful deformation, and the mounting joints ensure that the engine can always be fixed on the aircraft under various flight conditions. For some turboprop engines with rear output, the engine can only be connected to the aircraft through a single mounting surface, and the existing engine installation form cannot meet this requirement. However, the risk of installation failure of engines with multiple mounting planes is greater. Since the engines with multiple mounting planes have two mounting planes at the front and rear ends, when the mounting joints of any of the mounting planes fail, the engine will be separated from the aircraft, causing flight failures. In terms of weight reduction of the mounting joints, the existing engine casing mounting joints generally do not include weight reduction structures, and the mass of the mounting joints is large, which makes the overall mass of the engine large. In addition, it is also necessary to consider whether the structural strength of the mounting joints meets the actual usage. Summary of the invention

[0003] In view of the above problems, the present invention proposes a casing mounting structure, comprising: a plurality of mounting parts, a combustion chamber casing and a shock absorber, wherein the plurality of mounting parts are respectively arranged on the combustion chamber casing according to a preset circumferential direction, and adjacent mounting parts are connected to each other, and a plurality of weight reducing grooves and connecting holes are provided on each of the mounting parts, the weight reducing grooves are evenly distributed on the mounting parts, and the connecting holes are located on the edge area of ​​the mounting parts, the connecting parts of the shock absorber cooperate with each of the connecting holes, a plurality of force transmission ribs are formed between each of the weight reducing grooves, a plurality of first annular ribs are formed between each of the weight reducing grooves and the adjacent connecting holes, and the force transmission ribs are connected to the first annular ribs.

[0004] Optionally, the mounting portion includes a mounting surface, a positioning hole is provided in a central area of ​​the mounting surface, and a plurality of connecting holes are provided at edge corners of the mounting surface, each of the weight reducing grooves is circumferentially arranged around the positioning hole and forms a second annular rib, a plurality of the force transmission ribs are respectively circumferentially connected to the second annular rib, and the mounting surface is arranged on the combustion chamber casing.

[0005] Optionally, the mounting portion further includes a plurality of reinforcing ribs, the mounting surfaces on adjacent mounting portions are connected via the reinforcing ribs, and the bottom surfaces of the reinforcing ribs are arranged on the combustion chamber casing.

[0006] Optionally, the reinforcing rib and the mounting surface form an arch structure or a trapezoidal structure.

[0007] Optionally, the width of the force transmission rib, the first annular rib and the second annular rib is not less than 4 mm.

[0008] Optionally, the plurality of weight-reducing grooves are symmetrical with respect to the radial direction of the positioning hole on the mounting surface.

[0009] Optionally, the weight-reducing groove has a depth between 6 and 20 mm.

[0010] Optionally, the weight-reducing groove has an irregular shape of a quadrilateral, a pentagon, a hexagon, a heptagon, a circle or an arc.

[0011] Optionally, the number of the weight reduction grooves is between 4 and 8.

[0012] Optionally, the edges in each of the weight-reducing grooves are rounded.

[0013] Compared with the prior art, the casing mounting structure of the present invention has at least the following advantages: multiple mounting parts are respectively arranged on the combustion chamber casing according to a preset circumferential direction, that is, the mounting parts are on the same plane, and the installation of a single mounting surface is realized, so that the failure of any mounting part will not cause the failure of the engine mounting function, thereby reducing the risk of engine installation failure. Since multiple weight-reducing grooves are arranged on each mounting part, the weight of the mounting part is reduced, and the weight-reducing grooves are arranged along the circumference of the mounting part, so that the weight-reducing grooves are arranged reasonably, so that the force transmission ribs and the first annular ribs formed can improve the strength of the mounting part and reduce the mass of the mounting part.

[0014] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the casing installation structure in an embodiment of the present invention is shown;

[0017] Figure 2A side view of the casing mounting structure in an embodiment of the present invention is shown perpendicular to the casing mounting surface;

[0018] Figure 3 shows a spatial distribution diagram of a casing installation structure in an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of adjacent mounting parts of a casing mounting structure in an embodiment of the present invention is shown.

[0020] In the figure, 1, mounting portion; 2, combustion chamber casing; 11, mounting surface; 12, reinforcing rib; 111, weight-reducing groove; 112, positioning hole; 113, connecting hole; 114, force-transmitting rib; 115, first annular rib; 116, second annular rib. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1As shown, the present invention provides a casing mounting structure, comprising: a plurality of mounting portions 1, a combustion chamber casing 2 and a shock absorber, wherein the plurality of mounting portions 1 are respectively arranged on the combustion chamber casing 2 according to a preset circumferential direction, and adjacent mounting portions 1 are connected to each other, and a plurality of weight reducing grooves 111 and connecting holes 113 are provided on each mounting portion 1, wherein the plurality of weight reducing grooves 111 are evenly distributed on the mounting portion 1, and the connecting holes 113 are located on the edge area of ​​the mounting portion 1, and the connecting portions of the shock absorber cooperate with the connecting holes 113, and a plurality of force transmission ribs 114 are formed between the weight reducing grooves 111, and a plurality of first annular ribs 115 are formed between each weight reducing groove 111 and the adjacent connecting holes 113, and the force transmission ribs 114 are connected to the first annular ribs 115, and the sizes of the weight reducing grooves 111 may be different, and the groove depths may be the same. Since the mounting portion 1 is on the same plane, the installation of a single mounting surface 11 is realized, so that the failure of any mounting portion 1 in the mounting portion 1 will not cause the failure of the engine installation function, reducing the risk of engine installation failure. Since a plurality of weight-reducing grooves 111 are provided on each mounting portion 1, the weight reduction of the mounting portion 1 is achieved, and the weight-reducing grooves 111 are reasonably arranged on the mounting portion 1, so that the formed force transmission ribs 114 and the first annular ribs 115 can improve the strength of the mounting portion. It should be noted that the mounting portion 1 is designed as an integral whole with the combustion chamber casing 2 to ensure the strength of the mounting portion 1. Multiple mounting portions 1 are arranged on the same cross section of the combustion chamber casing 2 with a certain angular arrangement relationship, and the cross-sectional position can be selected based on the comprehensive consideration of the engine center of gravity and other factors. Optionally, there are four mounting portions 1. Optionally, a plurality of weight-reducing holes are provided on each mounting portion 1, and the plurality of weight-reducing holes are arranged along the circumference of the mounting portion 1, and the size of each weight-reducing hole is the same. Although the weight-reducing holes can also reduce weight, they are not as effective as the weight-reducing grooves 111 , and their structural strength is not as high as that of the weight-reducing grooves 111 .

[0023] In one embodiment, the mounting portion 1 includes a mounting surface 11, a positioning hole 112 is provided in the central area of ​​the mounting surface 11, and the positioning hole 112 is used to facilitate the positioning and installation of the engine, and a plurality of connecting holes 113 are provided near the edge corners of the mounting surface 11. Specifically, there are four connecting holes 113, and the connecting holes 113 are arranged on the four corners of the mounting surface 11. Each weight-reducing groove 111 is circumferentially arranged along the edge area of ​​the mounting surface 11. By reasonably arranging the weight-reducing grooves 111, not only the weight of the entire structure can be reasonably reduced, but also the structural strength of the mounting portion 1 will not be affected. Figure 3As shown, each weight-reducing groove 111 is circumferentially arranged around the positioning hole 112 to form a second annular rib 116, and a plurality of force-transmitting ribs 114 are circumferentially connected to the second annular rib 116, respectively. The mounting surface 11 is arranged on the combustion chamber casing 2, and the shock absorber is conveniently fixed on the mounting surface 11 through the connecting hole 113. It should be noted that the positioning hole 112 can accurately locate the installation of the engine, and at the same time, the load on the mounting part 1 can be transmitted to the aircraft shock absorber through the center pin, reducing the load borne by the screws on the mounting part 1, avoiding the occurrence of screw fracture failure, and fixing the shock absorber through the screws and the connecting hole 113. In addition, the force transmission direction on the mounting surface is from the positioning hole 112 to the connecting hole 113. The force transmission ribs 114 on the mounting surface 11 can maintain the continuity of the force flow of the structural force transmission, and at the same time make the force transmission path as short as possible, optimize the structural layout of the mounting part 1, reduce the mass of the mounting part 1, obtain higher structural stiffness and strength, and improve the structural efficiency. Specifically, the force can be transmitted to each force transmission rib 114 through the second annular rib 116, and then transmitted to the first annular rib 115 through the force transmission rib 114, and finally transmitted to the reinforcing rib and the combustion chamber casing 2 through the first annular rib 115 and the connecting hole 113, so that the force is more evenly distributed and the overall structural strength is improved.

[0024] like Figure 4 As shown, in one embodiment, the mounting portion 1 further includes a plurality of reinforcing ribs 12, and the mounting surfaces 11 on adjacent mounting portions 1 are connected by the reinforcing ribs 12, and the bottom surface of the reinforcing ribs 12 is arranged on the combustion chamber casing 2. Optionally, the width of the force transmission rib 114, the first annular rib 115, and the second annular rib 116 is not less than 4 mm, and the strength of the entire structure can be improved by the appropriate width of the force transmission rib 114, the first annular rib 115, and the second annular rib 116. The reinforcing ribs 12 of adjacent mounting portions 1 can be designed as one body, and the reinforcing ribs 12 can evenly release the load on the mounting surface 11 to the combustion chamber casing 2, reduce the local stress concentration of the mounting portion 1, and improve the strength of the combustion chamber casing 2.

[0025] In one embodiment, the reinforcing rib 12 and the mounting surface 11 form an arched structure or a trapezoidal structure. It should be noted that the arched structure or the trapezoidal structure can improve the overall structural strength of the mounting portion 1. It should be noted that the angle formed by the tangent line at the connection between the reinforcing rib and the combustion chamber casing is maintained at 8°-20°, and the angle should not be too large or too small. A too large angle will cause stress concentration at the connection, and a too small angle will cause the reinforcing rib to be too long, which is not conducive to weight reduction.

[0026] In one embodiment, each mounting surface 11 has four to eight weight-reducing grooves 111. The weight of the entire structure is reduced by the four to eight weight-reducing grooves 111. Optionally, the number of weight-reducing grooves 111 of the present invention is six.

[0027] In one embodiment, the six weight-reducing grooves 111 are symmetrical with respect to the radial direction of the positioning hole 112 on the mounting surface 11. Optionally, the six weight-reducing grooves 111 are symmetrical with respect to each other.

[0028] In one embodiment, the depth of the weight-reducing groove 111 is 6 to 20 mm. The wall thickness of the receiver corresponding to the position point where the groove is the deepest should meet the design requirements. Optionally, the depth of the weight-reducing groove 111 can be adjusted based on the height of the mounting surface 11 of the mounting portion 1. For example, when the size of the receiver is small, the height of the mounting surface 11 of the receiver mounting portion 1 will also be small, and the depth of the weight-reducing groove 111 of the mounting portion 1 is about 6 to 10 mm; when the size of the receiver is large, the height of the mounting surface 11 of the receiver mounting portion 1 will be large, and the depth of the weight-reducing groove 111 of the mounting portion 1 is about 10 to 20 mm.

[0029] In one embodiment, the weight-reducing groove 111 is an irregular quadrilateral, pentagon, hexagon, heptagon, circle or arc. It should be noted that the weight-reducing grooves 111 of different shapes and structures need to be provided with grooves of different sizes, and these grooves can reduce the number of the overall structure. The weight-reducing groove 111 can reduce the weight of the mounting part 1 by about 25% to 35%, which greatly reduces the mass of the mounting part 1.

[0030] In one embodiment, the edges in each weight-reducing groove 111 are chamfered. By adopting a chamfered design, stress concentration can be avoided and the structural strength is improved. Optionally, five force-transmitting ribs 114 are formed between each adjacent weight-reducing groove 111, and the connecting hole 113 and the positioning hole 112 on the mounting surface 11 are connected by the force-transmitting ribs 114. Five force-transmitting ribs 114 are arranged on each mounting surface 11. The force-transmitting ribs 114 are long strips, and the width of the force-transmitting ribs 114 is generally 4 to 5 mm. The center line of the force-transmitting rib 114 coincides with the line connecting the center of the connecting hole 113 and the center of the positioning hole 112. The force-transmitting rib 114 can effectively transmit the load at the connecting hole 113 to the positioning hole 112.

[0031] In summary, the mounting portion 1 of the present invention can meet the needs of a single mounting plane of the engine and can reduce the risk of engine installation failure. The existing mounting node is connected to the casing body through a transition surface, and the mounting surface 11 of the present invention is connected to the casing body through a reinforcing rib 12. The reinforcing rib 12 structure can reduce the mass of the mounting node while ensuring the strength of the mounting portion 1. Through a plurality of weight-reducing grooves 111, the weight of the mounting portion 1 is reduced, that is, the mass of the mounting portion 1 is reduced.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casing installation structure, characterized in that: include: A plurality of mounting parts (1), a combustion chamber casing (2) and a shock absorber, wherein the plurality of mounting parts (1) are respectively arranged on the combustion chamber casing (2) according to a preset circumferential direction, and adjacent mounting parts (1) are connected to each other. A plurality of weight-reducing grooves (111) and connecting holes (113) are provided on each mounting part (1), wherein the weight-reducing grooves (111) are evenly distributed on the mounting part (1), and the connecting holes (113) are located on the edge area of ​​the mounting part (1). The connecting parts of the shock absorber cooperate with the connecting holes (113), and a plurality of force-transmitting ribs are formed between the weight-reducing grooves (111), and a plurality of first annular ribs are formed between each weight-reducing groove (111) and the adjacent connecting holes (113), and the force-transmitting ribs are connected to the first annular ribs.

2. The casing mounting structure according to claim 1, characterized in that: The mounting portion (1) comprises a mounting surface (11), a positioning hole (112) is provided in a central area of ​​the mounting surface (11), and a plurality of connecting holes (113) are provided at edge corners of the mounting surface (11), each of the weight-reducing grooves (111) is circumferentially arranged around the positioning hole (112) to form a second annular rib, a plurality of the force-transmitting ribs are circumferentially connected to the second annular rib, and the mounting surface (11) is arranged on the combustion chamber casing (2).

3. The casing mounting structure according to claim 2, characterized in that: The mounting portion (1) further comprises a plurality of reinforcing ribs (12), the mounting surfaces (11) on adjacent mounting portions (1) are connected via the reinforcing ribs (12), and the bottom surfaces of the reinforcing ribs (12) are arranged on the combustion chamber casing (2).

4. The casing mounting structure according to claim 3, characterized in that: The reinforcing rib (12) and the mounting surface (11) form an arch structure or a trapezoidal structure.

5. The casing mounting structure according to claim 2, characterized in that: The width of the force transmission rib, the first annular rib and the second annular rib is not less than 4 mm.

6. The casing mounting structure according to claim 5, characterized in that: The plurality of weight-reducing grooves (111) are symmetrical with respect to the radial direction of the positioning hole (112) on the mounting surface (11).

7. The casing mounting structure according to claim 1, characterized in that: The depth of the weight-reducing groove (111) is between 6 and 20 millimeters.

8. The casing mounting structure according to claim 1, characterized in that: The weight-reducing groove (111) is in the shape of an irregular quadrilateral, pentagon, hexagon, heptagon, circle or arc.

9. The casing mounting structure according to claim 1, characterized in that: The number of the weight-reducing grooves (111) is between 4 and 8.

10. The casing mounting structure according to claim 1, characterized in that: The edges in each of the weight-reducing grooves (111) are all rounded.

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