Assembly tooling and assembly method for elastic energy storage sealing ring at the front neck of aero-engine air duct

Abstract

The present invention discloses an assembly tooling and an assembly method for an elastic energy storage seal ring at the front neck of an aero-engine air duct, belonging to the technical field of design and manufacturing of assembly process equipment for aero-engine production. An assembly tooling and an assembly method for an elastic energy storage seal ring at the front neck of an aero-engine air duct are provided, which can effectively improve the assembly success rate and thus improve the assembly efficiency. The assembly tooling includes an introduction and expansion assembly and an auxiliary filling assembly. The elastic energy storage seal ring is assembled into the second groove of the front neck of the air duct through the introduction and expansion assembly with the cooperation of the auxiliary filling assembly and is evenly adhered to the inside of the second groove. The assembly method is to heat the elastic energy storage seal ring in lubricating oil at 80-120 °C for not less than 1 minute, and then gradually expand and install it into the inside of the second groove and evenly adhere to it with the cooperation of an expansion introduction pipe and a split rubber filling ring.

Description

Technical Field

[0001] The present invention relates to an assembly tooling, in particular to an assembly tooling for an elastic energy storage seal ring at the front neck of an aero-engine air duct, belonging to the technical field of design and manufacturing of assembly process equipment for aero-engine production. The present invention also relates to an assembly method for assembling an elastic energy storage seal ring by using the said assembly tooling. Background Art

[0002] The assembly of an aero-engine is an important part in the maintenance of an aero-engine. Before assembling the air duct, it is necessary to install an elastic energy storage seal ring at the front neck of the air duct. The structure of the elastic energy storage seal ring is relatively complex, with a metal spring inside and fluoroplastics wrapped outside, which makes the shrinkage performance of the elastic energy storage seal ring worse. If it cannot closely adhere to the groove of the air duct after installation, it is easily sheared during assembly, making it unable to play the roles of sealing and vibration damping. In the prior art, the success rate of assembly is only 30%, that is, 4 more elastic energy storage seal rings are needed for assembling one engine. Each time an energy storage seal ring is installed, it is necessary to wait for 24 hours until it completely shrinks before assembly. Each unqualified assembly will increase the repair cycle by one day. This not only seriously increases the cost, but also affects the progress of the entire assembly line. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide an assembly tooling for an elastic energy storage seal ring at the front neck of an aero-engine air duct that can effectively improve the assembly success rate and thus improve the assembly efficiency. The present invention also provides an assembly method for assembling an elastic energy storage seal ring by using the said assembly tooling.

[0004] The technical solution adopted to solve the above technical problem is: an assembly tooling for an elastic energy storage seal ring at the front neck of an aero-engine air duct, the said assembly tooling includes an introduction and expansion assembly and an auxiliary filling assembly, and the elastic energy storage seal ring is assembled into the second groove of the front neck of the air duct through the said introduction and expansion assembly with the cooperation of the auxiliary filling assembly and is evenly adhered to the inside of the second groove.

[0005] Furthermore, the said auxiliary filling assembly consists of a group of rubber filling rings, and the outer diameter of the rubber filling ring filled in the first groove is adapted to the outer diameter of the corresponding position of the front neck of the air duct.

[0006] The preferred mode of the above solution is that the said rubber filling ring is a split rubber filling ring.

[0007] Furthermore, the said assembly tooling also includes a transition splicing assembly, and the outer surface of the access end of the said introduction and expansion assembly is connected to the outer surface of the end of the front neck of the air duct through the said transition splicing assembly to form a detachable whole.

[0008] Preferably, the transition splicing component is composed of an inner sleeve, and the outer diameter of the inner sleeve is respectively adapted to the inner diameter of the front neck end of the air duct and the inner diameter of the splicing end of the introduction and expansion component.

[0009] Furthermore, the inner sleeve is fixedly connected to the inner wall of the introduction and expansion component.

[0010] Preferably, the introduction and expansion component is composed of an expansion introduction pipe with a conical outer surface. A splicing step with an inner diameter adapted to the outer diameter of the inner sleeve is arranged on the inner side of the large end of the expansion introduction pipe. The inner sleeve is fixedly connected to the expansion introduction pipe by inserting one end into the splicing step of the expansion introduction pipe.

[0011] Furthermore, there is an equal-diameter splicing section at one end of the expansion introduction pipe connected to the front neck of the air duct.

[0012] Furthermore, along the circumferential direction of the inner sleeve, a plurality of friction-reducing grooves extending in the length direction are arranged on the outer surface of the inner sleeve.

[0013] For the assembly method of assembling the elastic energy storage sealing ring using the described assembly tooling, the assembly method first manufactures the expansion introduction pipe and the inner sleeve, and inserts the inner sleeve into the expansion introduction pipe to form an integral body. Then, the elastic energy storage sealing ring is heated in lubricating oil at 80 - 120 °C for no less than 1 minute. At the same time, a split rubber packing ring is filled in the first groove of the front neck of the air duct. Next, the expansion introduction pipe is installed at the end of the front neck of the air duct through the inner sleeve. Finally, the qualified heated elastic energy storage sealing ring is expanded through the conical end of the expansion introduction pipe and introduced into the second groove, and the split rubber packing ring, the expansion introduction pipe, and the inner sleeve are removed to complete the assembly of the elastic energy storage sealing ring on the front neck of the air duct.

[0014] The beneficial effects of the present invention are as follows: The technical solution provided by this application sets up an assembly tooling including an introduction and expansion component and an auxiliary filling component, and assembles the elastic energy storage sealing ring into the second groove of the front neck of the air duct through the introduction and expansion component with the cooperation of the auxiliary filling component and evenly adheres to the inside of the second groove. Specifically, first manufacture the expansion introduction pipe and the inner sleeve of the introduction and expansion component, and insert the inner sleeve into the expansion introduction pipe to form an integral body. Then heat the elastic energy storage sealing ring in lubricating oil at 80-120°C for no less than 1 minute. At the same time, fill the auxiliary filling component composed of split rubber filling rings in the first groove of the front neck of the air duct. Then install the expansion introduction pipe to the end of the front neck of the air duct through the inner sleeve. Finally, expand the heated qualified elastic energy storage sealing ring through the conical end of the expansion introduction pipe and introduce it into the second groove, and remove the split rubber filling ring, the expansion introduction pipe and the inner sleeve to complete the assembly work of the elastic energy storage sealing ring on the front neck of the air duct. In this way, it solves the problem that the prior art has no reliable assembly tooling and can only use means for assembly, resulting in not only doubling the waste of elastic energy storage sealing rings, but also extremely low assembly efficiency, achieving the purpose of effectively improving the assembly success rate and further improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic diagram of the assembly tooling for the elastic energy storage sealing ring of the front neck of the aero-engine air duct of the present invention in an assembled state;

[0016] Figure 2 FIG. is a schematic diagram of the structure of the auxiliary filling component involved in the present invention;

[0017] Figure 3 FIG. is a schematic diagram of the structure of the introduction and expansion component involved in the present invention.

[0018] The marks in the figure are: introduction and expansion component 1, auxiliary filling component 2, front neck of air duct 3, second groove 4, elastic energy storage sealing ring 5, transition splicing component 6, equal-diameter splicing section 7, friction-reducing groove 8. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Such as Figure 1 、 Figure 2 And Figure 3Shown is an assembly tooling for the elastic energy storage seal ring at the front neck of an aero-engine air duct provided by the present invention, which can effectively improve the assembly success rate and thus submit the assembly efficiency, as well as an assembly method for assembling the elastic energy storage seal ring using the said assembly tooling. The said assembly tooling includes an introduction and expansion assembly 1 and an auxiliary filling assembly 2. The elastic energy storage seal ring 5 is assembled into the second groove 4 of the front neck of the air duct through the introduction and expansion assembly 1 with the cooperation of the auxiliary filling assembly 2 and is uniformly attached to the inside of the second groove 4. The technical solution provided by this application solves the problem that the prior art has no reliable assembly tooling and can only use means for assembly, resulting in not only doubling the waste of elastic energy storage seal rings but also extremely low assembly efficiency, by setting up an assembly tooling including an introduction and expansion assembly and an auxiliary filling assembly, enabling the elastic energy storage seal ring to be assembled into the second groove of the front neck of the air duct through the introduction and expansion assembly with the cooperation of the auxiliary filling assembly and being uniformly attached to the inside of the second groove. Specifically, first, make the expansion introduction pipe and the inner sleeve of the introduction and expansion assembly, and insert the inner sleeve into the expansion introduction pipe to form an integral body. Then, heat the elastic energy storage seal ring in lubricating oil at 80 - 120 °C for no less than 1 minute. At the same time, fill the first groove of the front neck of the air duct with an auxiliary filling assembly composed of split rubber filling rings. Next, install the expansion introduction pipe to the end of the front neck of the air duct through the inner sleeve. Finally, expand and introduce the qualified heated elastic energy storage seal ring into the second groove through the conical end of the expansion introduction pipe, and remove the split rubber filling ring, the expansion introduction pipe, and the inner sleeve to complete the assembly of the elastic energy storage seal ring at the front neck of the air duct. In this way, the purpose of effectively improving the assembly success rate and thus submitting the assembly efficiency is achieved.

[0020] In the above embodiment, in order to reduce the assembly cost and at the same time maximize the operation convenience, the auxiliary filling assembly 2 described in this application is composed of a group of rubber filling rings, and the outer diameter of the rubber filling ring filled in the first groove 6 is adapted to the outer diameter at the corresponding position of the front neck 3 of the air duct. At this time, the rubber filling ring is a split rubber filling ring.

[0021] Furthermore, in combination with the structural characteristics of the front neck of the air duct, in order to facilitate the accurate and rapid assembly of the introduction and expansion assembly 1 of the present application onto the air duct and to be able to quickly disassemble it after the elastic energy storage sealing ring is assembled, the assembly tooling described in the present application further includes a transition splicing assembly 6. The outer surface of the access end of the introduction and expansion assembly 1 is correspondingly connected to the outer surface of the front neck end of the air duct through the transition splicing assembly 6 to form a detachable whole. At this time, the transition splicing assembly 6 is composed of an inner sleeve. The outer diameter of the inner sleeve is respectively adapted to the inner diameter of the front neck end of the air duct and the inner diameter of the splicing end of the introduction and expansion assembly 1. The inner sleeve is fixedly connected to the inner wall of the introduction and expansion assembly 1. At this time, the introduction and expansion assembly 1 is preferably composed of an expansion introduction pipe with a conical outer surface. A splicing step with an inner diameter adapted to the outer diameter of the inner sleeve is provided inside the large end of the expansion introduction pipe. The inner sleeve is fixedly connected to the expansion introduction pipe by inserting one end of the splicing step of the expansion introduction pipe.

[0022] At the same time, in order to avoid burrs that may damage the elastic energy storage sealing ring during the assembly of the expansion introduction pipe, a section of equal-diameter splicing section 7 is provided at one end of the expansion introduction pipe connected to the front neck 3 of the air duct. And along the circumferential direction of the inner sleeve, a plurality of friction-reducing grooves 8 extending in the length direction are provided on the outer surface of the inner sleeve to reduce the weight of the tooling itself and facilitate assembly and disassembly.

[0023] In summary, the following advantages are also achieved by using the technical solution provided by the present application to assemble the elastic energy storage sealing ring of the front neck of the air duct.

[0024] 1) Improve the installation convenience of the air duct sealing ring, shorten the assembly time from the original 20 minutes to 10 minutes, and the efficiency is increased by 50%;

[0025] 2) Solve the problems of sealing ring flanging and shearing, improve the qualified rate of the elastic energy storage sealing ring from 31% to over 90%, and greatly save the repair cost. Specific embodiments

[0027] The purpose of the present application is to overcome the deficiencies of the prior art. By designing a guiding tool for the elastic energy storage sealing ring of the air duct, the elastic energy storage sealing ring expands uniformly during the introduction process, preventing the fluoroplastics from flanging or shrinking unevenly during the introduction, avoiding shearing during the assembly process, reducing the consumption of spare parts, shortening the assembly time, and improving the assembly quality.

[0028] The purpose of the present application is achieved through the following technical solutions:

[0029] To address the above technical problems, the present application provides a guiding tool for the elastic sealing ring of an aero-engine air duct. Since the sealing ring has poor shrinkage performance, if it cannot be evenly stressed and expanded during insertion, it may cause the sealing ring to fail to closely adhere to the groove of the air duct during the shrinkage process, resulting in shear during assembly. Analyzing the structural characteristics of the air duct, the outermost diameter is slightly larger than the diameter of the sealing ring, and during the insertion process, it may cause cutting damage to the edge part of the front neck of the air duct, leading to the scrapping of the sealing ring.

[0030] Considering the structure of the air duct, a guiding surface is required to cooperate with the inner circle of the front neck of the air duct to ensure that the guiding tool does not rotate or shift during use. The connection between the guiding tool and the front neck adopts a covering connection to achieve a seamless connection with the air duct. The rear end of the guiding tool adopts an inclined surface and frustum structure, and a round chamfer is made at the connection with the thin wall to ensure uniform stress on the sealing ring during insertion and prevent flanging.

[0031] The technical solution of the present application will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present application is not limited to the following description.

[0032] Embodiment 1

[0033] A guiding tool for the elastic energy storage sealing ring of an aero-engine air duct, which includes the following steps when in use:

[0034] S1. Fix the air duct on a special vehicle frame and install the guiding tool.

[0035] S2. Assemble 2 semi-circular washers in the first groove of the air duct.

[0036] S3. Heat the elastic energy storage sealing ring in lubricating oil at (80 - 120) °C for about 1 minute, and insert the sealing ring with the opening facing down into the second groove.

[0037] S4. Assemble the elastic energy storage sealing ring in the second groove of the air duct.

[0038] S5. Remove the 2 semi-circular washers and assemble the elastic energy storage sealing ring in the first groove of the air duct.

[0039] S6. Remove the guiding tool.

[0040] The above is only the preferred implementation mode of the present application. It should be understood that the present application is not limited to the form disclosed herein, should not be regarded as an exclusion of other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the protection scope of the appended claims of the present application.

Claims

1. Assembly tooling for the elastic energy storage sealing ring at the front neck of an aero-engine air duct, characterized in that: The described assembly tooling includes an introduction and expansion component (1) and an auxiliary filling component (2). The elastic energy storage sealing ring (5) is assembled into the second groove (4) of the front neck of the air duct through the introduction and expansion component (1) with the cooperation of the auxiliary filling component (2) and is evenly attached to the inside of the second groove (4). The described auxiliary filling component (2) consists of a group of rubber filling rings. The outer diameter of the rubber filling ring filled in the first groove is adapted to the outer diameter of the corresponding position of the front neck (3) of the air duct. The described assembly tooling further includes a transition splicing component (6). The outer surface of the access end of the introduction and expansion component (1) is connected to the outer surface of the end of the front neck of the air duct through the transition splicing component (6) to form a detachable whole. The described transition splicing component (6) consists of an inner sleeve. The outer diameter of the inner sleeve is respectively adapted to the inner diameter of the end of the front neck of the air duct and the inner diameter of the splicing end of the introduction and expansion component (1). The inner sleeve is fixedly connected to the inner wall of the introduction and expansion component (1). The described introduction and expansion component (1) consists of an expansion introduction pipe with a conical outer surface. A splicing step with an inner diameter adapted to the outer diameter of the inner sleeve is arranged on the inner side of the large end of the expansion introduction pipe. The inner sleeve is fixedly connected to the expansion introduction pipe by inserting one end into the splicing step of the expansion introduction pipe.

2. The assembly tooling for the elastic energy storage sealing ring at the front neck of the aero-engine air duct according to claim 1, characterized in that: The described rubber filling ring is a split rubber filling ring.

3. The assembly tooling for the elastic energy storage sealing ring at the front neck of the aeroengine air duct according to claim 1 or 2, characterized in that: There is an equal-diameter splicing section (7) at one end of the expansion introduction pipe connected to the front neck (3) of the air duct.

4. The assembly tooling for the elastic energy storage sealing ring at the front neck of the aero-engine air duct according to claim 3, characterized in that: Along the circumferential direction of the inner sleeve, a plurality of friction-reducing grooves (8) extending in the length direction are arranged on the outer surface of the inner sleeve.

5. The assembly method of the elastic energy storage sealing ring using the assembly tooling described in claim 4, characterized in that: The described assembly method first manufactures the expansion introduction pipe and the inner sleeve, and inserts the inner sleeve into the expansion introduction pipe to form a whole. Then, the elastic energy storage sealing ring is heated in lubricating oil at 80 - 120 °C for not less than 1 minute. At the same time, the split rubber filling ring is filled in the first groove of the front neck of the air duct. Then, the expansion introduction pipe is installed at the end of the front neck of the air duct through the inner sleeve. Finally, the qualified heated elastic energy storage sealing ring is expanded through the conical end of the expansion introduction pipe and introduced into the second groove, and the split rubber filling ring, the expansion introduction pipe and the inner sleeve are removed to complete the assembly of the elastic energy storage sealing ring of the front neck of the air duct.

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