A low-profile outer ring block dropout inhibiting structure

Abstract

The application belongs to the field of low-pressure turbine guide vane design and relates to a structure for preventing low-guide outer ring blocks from falling off, which comprises a low-guide casing, outer ring blocks and an anti-falling ring. The low-guide casing is coaxially arranged with the outer ring blocks, and the end portions of the low-guide casing and the outer ring blocks are attached to each other. Sealing pieces are arranged between the low-guide casing and the outer ring blocks for sealing. A plurality of groups of first biasing holes are formed in the end portion of the low-guide casing in the circumferential direction, and a connecting bolt is threadedly connected in each group of first biasing holes. The anti-falling ring is supported by the low-guide casing and is used to press the outer ring blocks, thereby effectively preventing the outer ring blocks from falling off in the axial direction. The structure avoids the risk that the sealing pieces are easily lost or fall off, avoids the sealing pieces from falling into the engine and causing quality accidents and safety hazards, reduces the cost of assembly, disassembly, rework or intentional disassembly of the outer ring blocks, and greatly improves the assembly efficiency of the engine. The structure has a light weight and can be manually installed.

Description

Technical Field

[0001] This application belongs to the field of low-pressure turbine guide design, and specifically relates to a structure for suppressing the detachment of the low-pressure outer ring block. Background Technology

[0002] During the assembly of a fourth-generation aircraft's low-pressure turbine guide, the outer ring block is prone to detachment during the flipping process, and the sealing strips between the outer ring blocks are easily lost, affecting the engine's quality and test run safety.

[0003] Existing structures such as Figure 1 As shown, the specific disadvantages are as follows:

[0004] (1) The outer ring block of the low-pressure turbine guide is prone to fall off during the disassembly and assembly process, resulting in rework of the assembly.

[0005] (2) After the outer ring block falls off, the sealing piece is easily lost and falls into other parts, affecting the engine assembly quality and performance safety.

[0006] Therefore, how to prevent the low-conductivity outer ring block from falling off is a problem that needs to be solved. Summary of the Invention

[0007] The purpose of this application is to provide a structure that suppresses the detachment of low-conductivity outer ring blocks, thereby solving the problem that existing low-conductivity outer ring blocks are prone to detachment.

[0008] The technical solution of this application is: a structure for preventing the low-conductivity outer ring block from detaching, including a low-conductivity housing, an outer ring block, and an anti-detachment ring; the low-conductivity housing and the outer ring block are coaxially arranged and the ends of the low-conductivity housing and the outer ring block are in contact; a sealing plate for sealing is provided between the low-conductivity housing and the outer ring block; the ends of the low-conductivity housing are provided with multiple sets of first bias holes along the circumferential direction, and each set of first bias holes is internally threaded with a connecting bolt;

[0009] The outer ring block is provided with an L-shaped connecting ring at its end. The anti-detachment ring is also L-shaped in cross-section. The anti-detachment ring is placed on the connecting ring and has multiple sets of second offset holes along its circumference. Each set of second offset holes corresponds to a connecting bolt. The connecting bolts are threaded into the second offset holes to fix the low-conductivity casing and the anti-detachment ring to each other.

[0010] Preferably, the anti-detachment ring is fitted with the stop of the connecting ring.

[0011] Preferably, the number of the second bias holes is 96 groups, and the angular deviation between adjacent second bias holes is 3°.

[0012] Preferably, the anti-detachment ring includes a vertical plate and a horizontal plate, the second offset hole is formed on the vertical plate, and the width of the horizontal plate is much larger than the width of the vertical plate.

[0013] Preferably, the width of the vertical plate is 2mm, and the outer surface of the horizontal plate is flush with the end of the connecting ring.

[0014] Preferably, the outer surface of the anti-detachment ring is manufactured using a knurling process, and the modulus of the knurling is 0.4.

[0015] This application's structure for suppressing the detachment of the low-guide outer ring block effectively prevents the outer ring block from detaching axially, as the anti-detachment ring is supported by the low-guide casing and simultaneously presses against the outer ring block. This avoids the risk of the sealing plate easily falling off and being lost or dropped, preventing the sealing plate from falling into the engine and causing quality accidents and safety hazards. It also reduces the efficiency and cost of assembly disassembly and rework or intentionally removing the outer ring block, greatly improving engine assembly efficiency. The structure is lightweight and can be installed manually. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the background technology structure;

[0018] Figure 2 This is a cross-sectional view of the overall structure of this application;

[0019] Figure 3 This is a schematic diagram of the circumferential partial structure of the anti-detachment ring in this application;

[0020] Figure 4 This is a schematic cross-sectional view of the anti-detachment ring structure of this application.

[0021] 1. Low-profile casing; 2. Outer ring block; 3. Anti-detachment ring; 4. Connecting ring; 5. Connecting bolt; 6. Second offset hole; 7. Vertical plate; 8. Horizontal plate. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] A structure for suppressing the expulsion of low-conductivity outer ring blocks, such as Figures 2-3It includes a low-conductivity housing 1, an outer ring block 2, and an anti-detachment ring 3. The low-conductivity housing 1 and the outer ring block 2 are coaxially arranged and the ends of the low-conductivity housing 1 and the outer ring block 2 are in contact. A sealing plate for sealing is provided between the low-conductivity housing 1 and the outer ring block 2. Multiple sets of first bias holes are opened circumferentially at the ends of the low-conductivity housing 1, and a connecting bolt 5 is threaded into each set of first bias holes.

[0024] The outer ring block 2 is provided with a connecting ring 4 with an L-shaped cross section at its end. The anti-detachment ring 3 also has an L-shaped cross section. The anti-detachment ring 3 is placed on the connecting ring 4 and the anti-detachment ring 3 has multiple sets of second bias holes 6 along the circumference. Each set of second bias holes 6 is provided with a connecting bolt 5. Each second bias hole 6 is provided with a connecting bolt 5. The connecting bolt 5 and the second bias hole 6 are threaded together to fix the low-conductivity casing 1 and the anti-detachment ring 3 to each other.

[0025] Through this design, the anti-detachment ring 3 is supported by the low-profile casing 1 and simultaneously presses against the outer ring block 2, thereby effectively preventing the outer ring block 2 from detaching axially. This avoids the risk of the sealing plate easily falling off and being lost or dropped, preventing the sealing plate from falling into the engine and causing quality accidents and safety hazards. It also reduces the efficiency and cost of assembly disassembly and rework or intentionally removing the outer ring block 2, greatly improving the assembly efficiency of the engine. This structure is lightweight and can be installed manually.

[0026] Preferably, the anti-detachment ring 3 is fitted with the stop of the connecting ring 4, thereby enabling effective centering of the anti-detachment ring 3.

[0027] Preferably, the number of second bias holes 6 is 96 sets, and the angular deviation between adjacent second bias holes 6 is 3°, so as to ensure the tightness of the connection by using a sufficient number of second bias holes 6.

[0028] Preferably, combined with Figure 4 The anti-detachment ring 3 includes a vertical plate 7 and a horizontal plate 8. The second offset hole 6 is opened on the vertical plate 7. The width of the horizontal plate 8 is much larger than the width of the vertical plate 7. The horizontal plate 8 cooperates with the connecting ring 4 to ensure stronger load-bearing strength under the same mass.

[0029] Preferably, the width of the vertical plate 7 is 2mm, and the outer surface of the horizontal plate 8 is flush with the end of the connecting ring 4.

[0030] Preferably, the outer surface of the anti-detachment ring 3 is manufactured using a knurling process with a knurling modulus of 0.4, thereby ensuring strong friction between the anti-detachment ring 3 and the connecting ring 4.

[0031] Finally, it should be noted that the accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0032] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A structure for suppressing the ejection of a low-conductivity outer ring block, characterized in that: It includes a low-conductivity housing (1), an outer ring block (2), and an anti-detachment ring (3); the low-conductivity housing (1) and the outer ring block (2) are coaxially arranged and the ends of the low-conductivity housing (1) and the outer ring block (2) are in contact; a sealing plate for sealing is provided between the low-conductivity housing (1) and the outer ring block (2); multiple sets of first bias holes are opened in the circumferential direction at the end of the low-conductivity housing (1), and a connecting bolt (5) is threaded into each set of first bias holes; The outer ring block (2) is provided with a connecting ring (4) with an L-shaped cross-section at its end. The anti-detachment ring (3) also has an L-shaped cross-section. The anti-detachment ring (3) is placed on the connecting ring (4) and the anti-detachment ring (3) has multiple sets of second offset holes (6) circumferentially. Each set of second offset holes (6) corresponds to a connecting bolt (5). Each second offset hole (6) corresponds to a connecting bolt (5). The connecting bolt (5) and the second offset hole (6) are threaded together to fix the low-conductivity casing (1) and the anti-detachment ring (3) to each other.

2. The structure for suppressing the ejection of the low-conductivity outer ring block as described in claim 1, characterized in that: The anti-detachment ring (3) and the connecting ring (4) are fitted together.

3. The structure for suppressing the ejection of the low-conductivity outer ring block as described in claim 1, characterized in that: The number of the second bias holes (6) is 96 sets, and the angular deviation between adjacent second bias holes (6) is 3°.

4. The structure for suppressing the ejection of the low-conductivity outer ring block as described in claim 1, characterized in that: The anti-detachment ring (3) includes a vertical plate (7) and a horizontal plate (8), the second offset hole (6) is opened on the vertical plate (7), and the width of the horizontal plate (8) is much larger than the width of the vertical plate (7).

5. The structure for suppressing the ejection of the low-conductivity outer ring block as described in claim 4, characterized in that: The width of the vertical plate (7) is 2mm, and the outer surface of the horizontal plate (8) is flush with the end of the connecting ring (4).

6. The structure for suppressing the ejection of the low-conductivity outer ring block as described in claim 1, characterized in that: The outer surface of the anti-detachment ring (3) is manufactured using a knurling process, and the knurling modulus is 0.4.

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