A new assembly and disassembly device for adjustable blades of aircraft engine intake casing

Abstract

The present application belongs to the field of aero-engine technology, and particularly relates to an assembly and disassembly device for adjustable blades of an air intake casing of a novel aero-engine. The present application belongs to the field of aero-engine technology, and particularly relates to an assembly and disassembly device for adjustable blades of an air intake casing of a novel aero-engine; comprising: a connecting ring and a plurality of fixed clips mounted on the connecting ring and sliding circumferentially along the connecting ring; the fixed clip has a supporting base, the supporting base has a through groove, the two side walls of the through groove are respectively hinged with a support arm, and springs are respectively installed between the groove walls and the support arms, and the two support arms approach each other under the action of the springs to form a movable clamp; the damage of the machine parts is effectively avoided, the working strength and service life of the machine parts are ensured, the use cost, maintenance cost and human resource cost are reduced, and the assembly and disassembly efficiency is significantly improved.

Description

Technical Field

[0001] The present application belongs to the field of aero-engine technology, and in particular relates to a novel assembly and disassembly device for adjustable blades of an aero-engine air intake casing. Background Art

[0002] Aircraft engine inlets are generally designed with adjustable stator blade structures. During engine operation, the air intake volume of the inlet is controlled by adjusting the angle of the adjustable stator blades. If the assembly tightness of the adjustable stator blades is too large during assembly, the resistance force of the adjustable stator blades will be increased, causing the actual rotation angle of the adjustable stator blades to be inconsistent with the designed angle during engine operation, seriously affecting engine performance.

[0003] The intake casing components are divided into casing, adjustable stator blades, stator inner ring and inner and outer bushings. The casing is designed as a circumferential fixed support plate structure. During assembly, the adjustable stator blades are installed above the fixed support plate, and the contact position is a circular arc segment fit. First, insert the outer end of the adjustable stator blade into the outer hole of the casing, and install the outer bushing and inner bushing. When all the adjustable stator blades are installed, install the stator inner ring. When assembling the stator inner ring, since the outer end of the adjustable stator blade is supported by the casing and the outer bushing, and the inner section is in a free state, if the adjustable stator blades tilt to the left or right, the inner section will be tilted, making it impossible to install the stator inner ring in place. Therefore, multiple people are required to manually straighten all the circumferential adjustable stator blades to a vertical state and keep them still (3-4 people are required) until the stator inner ring is installed.

[0004] Disadvantages of existing technical solutions:

[0005] (1) When assembling and disassembling the adjustable blades of the air intake casing, multiple people (3-4 people) are required to manually straighten the adjustable blades and keep them in place, which increases the waste of human resources;

[0006] (2) At the same time, the number of adjustable blades in the air intake casing is generally 17 or more. It is impossible to ensure that all adjustable stator blades are installed in the same posture by manual alignment, which will inevitably lead to inconsistent tightness after assembly. If a single blade is stuck, it needs to be disassembled and reassembled, which greatly reduces the assembly efficiency.

[0007] (3) When assembling and disassembling the adjustable stator blades, even 3-4 people cannot fix all the adjustable blades by hand, which is greatly affected by the technical level of the operators, resulting in the risk that the adjustable stator blades may fall left and right or collide with each other, causing damage to the adjustable stator blades. Summary of the Invention

[0008] In order to solve the above problems, the present application provides a novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing, comprising: a connecting ring and a plurality of fixing clips mounted on the connecting ring and sliding circumferentially along the connecting ring;

[0009] The fixed clamp has a supporting base, which has a through slot. The two side walls of the through slot are respectively hinged with a support arm, and springs are respectively installed between the slot walls and the support arms. Under the action of the springs, the two support arms approach each other to form a movable clamp.

[0010] Preferably, the connecting ring has a detachable sector, and after the sector is removed from the connecting ring, a port for installing or removing the fixing clip is formed.

[0011] Preferably, the support base has a mounting through hole, the curvature of the hole axis of the mounting through hole is the same as the curvature of the connecting ring, and the connecting ring passes through the mounting through hole so that the support base slides circumferentially on the connecting ring.

[0012] Preferably, the two side walls of the through groove have a single-ear structure, the inner wall surface of the single-ear structure has a first mounting groove, the support arm has a second mounting groove for accommodating the single-ear structure, and the spring is a V-shaped spring, which has a first force arm and a second force arm, the first force arm is overlapped on the bottom of the first mounting groove, and the second force arm is overlapped on the bottom of the second mounting groove.

[0013] Preferably, the cross section of the connecting ring is the same as the cross section of the mounting through hole, and the cross section of the mounting through hole includes an oblate circle, a triangle or a rectangle.

[0014] Preferably, the lower end surface of the support base is perpendicular to the center plane of the through slot.

[0015] Preferably, the single-ear structure is hinged to the support arm via a connecting pin, and the center hole of the spring is sleeved on the connecting pin.

[0016] Preferably, the movable clamp is made of fluoroplastic material.

[0017] Preferably, the end of the movable clamp forms an arc end surface for easy insertion of the adjustable blade.

[0018] Preferably, the through groove has an opening angle from the groove bottom to the groove opening, and the opening angle becomes larger in the single-ear structure.

[0019] The present application can fix all the adjustable blades to be fixed through a dedicated assembly and disassembly device, replacing the manual fixation by multiple people. Only one person is required to operate and install, thus reducing human resource costs; all the adjustable stator blades can be kept in a vertical state at the same time, ensuring the consistency of assembly quality and avoiding the risk of rework; and the risk of damage to the parts caused by the adjustable blades tilting left and right and colliding with each other can be effectively avoided. The present application can be applied to the fixation of adjustable mechanisms in all fields such as aircraft engines and gas turbines, effectively avoiding the low-level quality problem of damage to the parts caused by the assembly and disassembly process, thereby reducing the use cost, maintenance cost, and human resource cost of the parts, greatly improving the assembly and disassembly efficiency, that is, significantly improving the assembly and disassembly efficiency, while being convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the assembly and disassembly device;

[0021] Figure 2a It is the front view of the connecting ring; Figure 2b It is the intention to connect the ring side;

[0022] Figure 3 It is a half-section view of the fixed clip;

[0023] Figure 4 yes Figure 3 AA cross-sectional view of the fixed clip;

[0024] Figure 5 yes Figure 3 Cross-sectional view of the fixed clip BB;

[0025] Figure 6 It is a schematic diagram of the fixing of the adjustable stator blades;

[0026] Figure 7 This is a schematic diagram of the assembly of adjustable stator blades;

[0027] Figure 8 This is a half-section diagram of the adjustable stator blade assembly;

[0028] Figure 9 It is a partial view of the half-section diagram of the adjustable stator blade assembly;

[0029] Figure 10 This is a structural diagram of the adjustable mechanism of the air intake casing. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the implementation of this application will be described in more detail below in conjunction with the drawings in the implementation of this application. In the drawings, the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and should not be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in conjunction with the drawings.

[0031] like Figure 7-10 As shown, the air intake casing components include a casing 10, adjustable stator blades 11, a stator inner ring 12, an inner sleeve 13 and an outer sleeve 14. The casing is designed as a circumferential fixed support plate 15 structure. During assembly, the adjustable stator blades 11 are installed above the fixed support plate 15, and the contact position is a circular arc segment fit. First, insert the outer end of the adjustable stator blade 11 into the outer hole of the casing, and install the outer sleeve 14 and the inner sleeve 13. When all the adjustable stator blades 11 are installed, install the stator inner ring 12. When the stator inner ring 12 is assembled, since the outer end of the adjustable stator blade 11 is supported by the casing and the outer sleeve 14, and the inner section is in a free state, the device of the present application is used to fix the inner section of the adjustable stator blade 11 close to the stator inner ring 12; the assembly and disassembly device of the adjustable blade of the intake casing of the present application mainly includes two parts: a connecting ring 1 and a fixing clamp 2. The number of the fixing clamps 2 is consistent with the number of the adjustable stator blades 11. The connecting ring 1 passes through all the fixing clamps 2, and the fixing clamp 2 can move freely along the circumference of the connecting ring 1. A part of the fan segment 3 on the connecting ring 1 is designed as a detachable structure, which is connected by screws 4. Figure 1 、 Figure 2a as well as Figure 2b As shown, it is convenient to replace the fixing clip 2 according to the adjustable stator blades of different types of engines. After the connecting ring 1 removes the sector segment 3, a port for installing or removing the fixing clip 2 is formed. The number of the fixing clips 2 on the connecting ring 1 can be increased or decreased through the port. The fixing clip 2 has a movable clip 6. The free end of each adjustable stator blade 11 is inserted into a fixing clip 2. After all the circumferential adjustable stator blades 11 are installed, the stator inner ring 12 is assembled.

[0032] Among them, such as Figure 3-Figure 5As shown, the fixed clip 2 has a support base 5, and the support base 5 has a through groove. The two side groove walls of the through groove are respectively hinged with a support arm, and a spring 7 is installed between the groove wall and the support arm. Under the action of the spring 7, the two support arms approach each other to form a movable clamp 6; the support base 5 has a mounting hole, and the curvature of the hole axis of the mounting hole is the same as the curvature of the connecting ring 1. The connecting ring 1 passes through the mounting hole to enable the support base 5 to slide circumferentially on the connecting ring 1; in order to facilitate the sliding of the fixed clip 2 on the connecting ring 1 without deflection, the cross section of the connecting ring 1 is the same as the cross section of the mounting hole, and the cross section of the mounting hole includes an oblate, triangular or rectangular shape.

[0033] The groove walls on both sides of the through groove have a single-ear structure, and the inner wall surface of the single-ear structure has a first mounting groove, and the support arm has a second mounting groove for accommodating the single-ear structure. The spring 7 adopts a V-shaped spring, which has a first force arm and a second force arm, the first force arm is overlapped on the groove bottom of the first mounting groove, and the second force arm is overlapped on the groove bottom of the second mounting groove; the single-ear structure and the support arm are hinged through a connecting pin 8, and the center hole of the spring 7 is sleeved on the connecting pin 8, which can make the torque application of the spring 7 more stable; the through groove of the support base 5 has an opening angle from the groove bottom to the groove mouth, and the opening angle becomes larger in the single-ear structure. In a specific embodiment, the through groove is a V-shaped opening groove to adapt to the fixed support plate of the air intake casing. The increase in the opening angle of the single-ear structure can increase the range of motion of the movable clamp 6, so that it can adapt to more models of adjustable stator blades 11. The schematic diagram of the adjustable stator blade fixing is shown in Figure 6 shown.

[0034] The present application can fix all the adjustable blades to be fixed through a dedicated assembly and disassembly device, replacing the manual fixation of multiple people, and only one person is required to operate and install, thereby reducing human resource costs; all adjustable stator blades can be kept in a vertical state at the same time, ensuring the consistency of assembly quality and avoiding the risk of rework; and effectively avoiding the risk of damage to the parts caused by the adjustable blades tilting left and right and colliding with each other. The present application can be applied to the fixation of adjustable mechanisms in all fields such as aircraft engines and gas turbines, effectively avoiding the low-level quality problem of damage to the parts caused by the assembly and disassembly process, thereby reducing the use cost and maintenance cost of the parts (damage caused by the previous solution required repair or return to the factory, while the current solution can effectively avoid damage to the parts), and human resource costs (this process previously required 3-4 people, while the current solution can complete it with 1 person), greatly improving the assembly and disassembly efficiency (this process previously required 60 minutes, while the current solution requires 10 minutes), that is, significantly improving the assembly and disassembly efficiency, while being convenient to use.

[0035] The above description is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing, characterized in that: include: A connecting ring (1) and a plurality of fixing clips (2) mounted on the connecting ring (1) and sliding along the circumference of the connecting ring (1); The fixed clamp (2) has a supporting base (5), the supporting base (5) has a through slot, the two side slot walls of the through slot are respectively hinged with a support arm, and a spring (7) is respectively installed between the slot wall and the support arm. Under the action of the spring (7), the two support arms approach each other to form a movable clamp (6); Insert the outer end of the adjustable stator blade (11) into the outer hole of the casing, and install the outer bushing (14) and the inner bushing (13). When all the adjustable stator blades (11) are installed, install the stator inner ring (12). When the stator inner ring (12) is assembled, since the outer end of the adjustable stator blade (11) is supported by the casing and the outer bushing (14), and the inner section is in a free state, the fixing clip (2) is used to fix the inner section of the adjustable stator blade (11) close to the stator inner ring (12).

2. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 1, characterized in that: The connecting ring (1) has a detachable sector segment (3). After the sector segment (3) is removed from the connecting ring (1), a port for installing or removing the fixed clamp (2) is formed.

3. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 2, characterized in that: The support base (5) has a mounting through hole, the curvature of the axis of the mounting through hole is the same as the curvature of the connecting ring (1), and the connecting ring (1) passes through the mounting through hole so that the support base (5) slides circumferentially on the connecting ring (1).

4. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 1, characterized in that: The groove walls on both sides of the through groove have a single-ear structure, the inner wall surface of the single-ear structure has a first mounting groove, the support arm has a second mounting groove for accommodating the single-ear structure, and the spring (7) adopts a V-shaped spring, which has a first force arm and a second force arm, the first force arm is overlapped on the groove bottom of the first mounting groove, and the second force arm is overlapped on the groove bottom of the second mounting groove.

5. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 3, characterized in that: The cross section of the connecting ring (1) is the same as the cross section of the mounting through hole, and the cross section of the mounting through hole includes an oblate circle, a triangle or a rectangle.

6. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 1, characterized in that: The lower end surface of the support base (5) is perpendicular to the central plane of the through groove.

7. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 4, characterized in that: The single ear structure is hinged to the support arm via a connecting pin (8), and the center hole of the spring (7) is sleeved on the connecting pin (8).

8. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 1, characterized in that: The movable clamp (6) is made of fluoroplastic material.

9. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 1, characterized in that: The end of the movable clamp (6) forms an arc end surface for easy insertion of the adjustable blade.

10. The novel assembly and disassembly device for adjustable blades of an aircraft engine air intake casing according to claim 4, characterized in that: The through slot has an opening angle from the slot bottom to the slot opening, and the opening angle becomes larger in the single-ear structure.

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