Semi-composite material mounting seat for turbofan engine case

Abstract

The utility model discloses a turbofan engine case semi-composite material mounting seat in the technical field, which comprises a composite material mechanism and a titanium alloy mechanism, the composite material mechanism comprises a composite material mounting seat, an integrally formed connecting column is arranged in the middle of the composite material mounting seat, and an internal thread taper cylinder is arranged in the connecting column; the titanium alloy mechanism is in threaded connection with the interior of the internal thread taper cylinder, the titanium alloy mechanism comprises a titanium alloy sleeve column, and a groove ring is formed in the middle of the titanium alloy sleeve column; the utility model has the advantages of weight reduction, low cost and the like, and the material cost of the mounting seat and the rivet and the labor cost of the riveting process can be saved by integral forming; the internal thread taper cylinder and the titanium alloy sleeve column are in threaded connection, the contact face of the titanium alloy sleeve column and the internal thread taper cylinder is coated with the sealant, the interior of the groove ring is fully coated with the sealant, and the connection stability and the connection sealing performance between the titanium alloy sleeve column and the internal thread taper cylinder can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite casings of large turbofan engines, in particular to a semi-composite material mounting seat for a turbofan engine casing. Background Art

[0002] The casing mounting bracket is mainly used to install the accessories required for the turbofan engine.

[0003] The operating conditions and vibration characteristics of turbofan engines are relatively complex. When considering the strength of the casing mounting bracket, it is also necessary to consider issues such as vibration characteristics and fatigue life.

[0004] The casing mount also needs to meet certain high temperature resistance requirements. Usually, titanium alloy is used as the material for the engine considering the requirements of temperature resistance and weight reduction.

[0005] The current casing mounting base can no longer meet the requirements for the development of new turbofan engine casings due to its high density, heavy weight and expensive processing cost.

[0006] The density of the composite receiver mounting base is 1.6-1.9g / cm 3 It is much smaller than 5.4 g / cm3 of titanium alloy. 3 The density of titanium alloy is 1 / 3 of that of titanium alloy, which has an absolute advantage in weight reduction, improves the thrust-to-weight ratio of the turbofan engine, and reduces the manufacturing cost of the turbofan engine.

[0007] Conventional receiver mountings utilize a metal structure, constructed from a cast titanium alloy and riveted to the composite housing. After assembly, the metal mountings achieve end and internal precision consistent with existing outer casings through combined machining. While the technology is mature and manufacturing is straightforward, secondary riveting is required, and the titanium alloy mountings and riveting process are relatively expensive. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides a semi-composite material mounting seat for a turbofan engine casing.

[0009] The purpose of the utility model is achieved as follows: a semi-composite material mounting seat for a turbofan engine casing, comprising a composite structure and a titanium alloy structure, wherein the composite structure includes a composite mounting seat, an integrally formed connecting column is provided in the middle of the composite mounting seat, and an internally threaded tapered cylinder is provided in the connecting column;

[0010] The titanium alloy mechanism is threadedly connected to the interior of the internal thread cone. The titanium alloy mechanism includes a titanium alloy sleeve. The outer wall of the titanium alloy sleeve is provided with thread teeth corresponding to the internal thread cone. A groove ring is provided in the middle of the titanium alloy sleeve.

[0011] Specifically, the outer shape of the titanium alloy sleeve is set to be a frustum, and the titanium alloy sleeve is threadedly connected to the interior of the internal threaded cone through thread teeth.

[0012] Specifically, the inner diameter of the upper end of the internal threaded cone is the same as the diameter of the top end of the titanium alloy sleeve, and the inner diameter of the lower end of the internal threaded cone is the same as the diameter of the bottom end of the titanium alloy sleeve.

[0013] Specifically, the titanium alloy sleeve is smeared with sealant on the contact surface of the threaded connection with the internal threaded cone, and the interior of the groove ring is fully coated with sealant.

[0014] Specifically, a threaded connection groove is provided at the top end of the titanium alloy sleeve, and a hexagonal socket is provided at the bottom end of the titanium alloy sleeve.

[0015] Specifically, it also includes a composite shell mold and a composite mounting seat mold. A pad is fixedly adhered to the bottom of the composite shell mold, a sedimentation tank is opened in the middle of the composite shell mold, and a through screw hole is opened in the center of the sedimentation tank.

[0016] Specifically, the composite mounting seat mold includes a frustum mold, which is fixed to the center of the upper surface of the composite shell mold by a hexagon socket bolt, and the composite structure is integrally cast by the composite shell mold and the composite mounting seat mold.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model replaces the traditional titanium alloy receiver mounting seat with a composite mounting seat. The integrated molding solution with the composite receiver has the advantages of weight reduction and low cost. The integrated molding can save the material cost of the mounting seat and rivets and the labor cost of the riveting process.

[0019] A threaded connection is made between the internal thread cone and the titanium alloy sleeve, and sealant is applied on the contact surface of the titanium alloy sleeve and the internal thread cone, and the inside of the groove ring is filled with sealant, which can improve the connection stability and sealing performance between the titanium alloy sleeve and the internal thread cone. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1This is a side view of the connection between the composite structure and the titanium alloy structure of the utility model;

[0022] Figure 2 This is a bottom view of the connection between the composite structure and the titanium alloy structure of the utility model;

[0023] Figure 3 This is a cross-sectional view of the connection between the composite structure and the titanium alloy structure of the utility model;

[0024] Figure 4 It is a structural diagram of the titanium alloy mechanism of the utility model;

[0025] Figure 5 This is a bottom view of the composite structure of the utility model;

[0026] Figure 6 It is a structural diagram of the composite shell mold, composite mounting seat mold and composite mechanism of the utility model;

[0027] Figure 7 This is a structural cross-sectional view of the composite shell mold, composite mounting seat mold and composite mechanism of the utility model;

[0028] Figure 8 This is a bottom view of the composite shell mold of the utility model;

[0029] Figure 9 It is a structural schematic diagram of the composite mounting seat mold of the utility model.

[0030] In the figure, 1. composite structure; 101. composite mounting seat; 102. connecting column; 103. internal threaded cone; 2. titanium alloy structure; 201. titanium alloy sleeve; 202. threaded connection groove; 203. groove ring; 204. hexagonal socket; 3. composite shell mold; 4. pad; 5. composite mounting seat mold; 501. frustum mold; 502. hexagonal socket bolt; 6. settlement trough; 7. through screw hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-9As shown, a semi-composite material mounting seat for a turbofan engine casing includes a composite structure 1 and a titanium alloy structure 2. The composite structure 1 includes a composite mounting seat 101. An integrally formed connecting column 102 is provided in the middle of the composite mounting seat 101. An internally threaded tapered cylinder 103 is provided in the connecting column 102.

[0033] The titanium alloy mechanism 2 is threadedly connected to the interior of the internal threaded cone 103. The titanium alloy mechanism 2 includes a titanium alloy sleeve 201. The outer wall of the titanium alloy sleeve 201 is provided with thread teeth corresponding to the internal threaded cone 103. A groove ring 203 is provided in the middle of the titanium alloy sleeve 201.

[0034] In this embodiment, preferably, the shape of the titanium alloy sleeve 201 is set to be a frustum, and the titanium alloy sleeve 201 is threadedly connected to the interior of the internal threaded cone 103 through thread teeth;

[0035] It should be noted that the titanium alloy sleeve 201 and the internal threaded cone 103 are configured in a frustum shape, so as to maintain a stable threaded connection of the titanium alloy sleeve 201 inside the internal threaded cone 103 and maintain a stable connection of the titanium alloy sleeve 201.

[0036] In this embodiment, preferably, the inner diameter of the upper end of the internal threaded cone 103 is the same as the diameter of the top end of the titanium alloy sleeve 201, and the inner diameter of the lower end of the internal threaded cone 103 is the same as the diameter of the bottom end of the titanium alloy sleeve 201;

[0037] It should be noted that the diameters of the internally threaded cone 103 and the titanium alloy sleeve 201 at the upper and lower ends are the same, so that the titanium alloy sleeve 201 can be stably connected to the internally threaded cone 103 .

[0038] In this embodiment, preferably, the titanium alloy sleeve 201 is coated with sealant on the contact surface of the threaded connection with the internal threaded cone 103, and the interior of the groove ring 203 is coated with sealant;

[0039] It should be noted that the setting of the sealant facilitates improving the connection stability and sealing between the titanium alloy sleeve 201 and the internal threaded cone 103 .

[0040] In this embodiment, preferably, a threaded connection groove 202 is provided at the top end of the titanium alloy sleeve 201, and a hexagonal socket 204 is provided at the bottom end of the titanium alloy sleeve 201;

[0041] It should be noted that the setting of the threaded connection groove 202 facilitates installation and connection, and the direction of the teeth inside the threaded connection groove 202 is opposite to the direction of the teeth of the internal threaded cone 103, which ensures that the connecting threads of the composite structure 1 and the titanium alloy structure 2 cannot loosen during use.

[0042] In this embodiment, preferably, it further includes a composite shell mold 3 and a composite mounting seat mold 5. A backing plate 4 is fixedly adhered to the bottom of the composite shell mold 3. A sedimentation tank 6 is opened in the middle of the composite shell mold 3. The composite shell mold 3 has a through screw hole 7 opened in the center of the sedimentation tank 6.

[0043] It should be noted that the setting of the backing plate 4 facilitates the protection and support of the composite shell mold 3 and facilitates the connection, and the setting of the sedimentation tank 6 and the through screw hole 7 facilitates the connection of the hexagon socket bolt 502.

[0044] In this embodiment, preferably, the composite mounting seat mold 5 includes a frustum mold 501, and the frustum mold 501 is fixed to the center of the upper surface of the composite shell mold 3 by a hexagon socket bolt 502. The composite structure 1 is integrally cast by the composite shell mold 3 and the composite mounting seat mold 5.

[0045] It should be noted that the hexagon socket bolts 502 are used to fix the composite mounting seat mold 5 on the composite shell mold 3. The cooperation between the composite mounting seat mold 5 and the composite shell mold 3 realizes the integral casting of the composite structure 1.

[0046] The specific operation process of this application:

[0047] The composite mounting seat mold 5 is installed and connected to the composite shell mold 3 by the hexagon socket bolt 502, and the composite mechanism 1 is integrally cast by the matched composite mounting seat mold 5 and the composite shell mold 3. Then, the hexagon socket bolt 502 is removed, so that the composite mounting seat mold 5 and the composite mechanism 1 can be separated from the composite shell mold 3, and then the composite mechanism 1 is removed from the composite mounting seat mold 5. Then, the titanium alloy mechanism 2 is threadedly connected to the internal threaded cone 103 of the composite mechanism 1, and the titanium alloy sleeve 201 is coated with sealant on the contact surface of the threaded connection to the internal threaded cone 103, and the interior of the groove ring 203 is coated with sealant. The setting of sealant facilitates improving the connection stability and sealing between the titanium alloy sleeve 201 and the internal threaded cone 103. During installation, a threaded connection groove 202 is provided at the top of the titanium alloy sleeve 201, and an inner hexagonal groove 204 is provided at the bottom of the titanium alloy sleeve 201. The setting of the threaded connection groove 202 facilitates installation and connection, and the direction of the teeth inside the threaded connection groove 202 is opposite to the direction of the teeth of the internal threaded cone 103, so as to ensure that the connecting threads of the composite structure 1 and the titanium alloy structure 2 cannot loosen during use, so that the titanium alloy sleeve 201 is threadedly connected through the inner hexagonal groove 204 to maintain the stability of the connection.

[0048] The above embodiments are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A turbofan engine casing semi-composite material mounting seat, characterized by: Comprising a composite structure (1) and a titanium alloy structure (2), the composite structure (1) comprising a composite mounting seat (101), an integrally formed connecting column (102) being provided in the middle of the composite mounting seat (101), and an internally threaded conical cylinder (103) being provided in the interior of the connecting column (102); The titanium alloy mechanism (2) is threadedly connected to the interior of the internal thread cone (103), and the titanium alloy mechanism (2) comprises a titanium alloy sleeve (201). The outer wall of the titanium alloy sleeve (201) is provided with thread teeth corresponding to the internal thread cone (103), and a groove ring (203) is provided in the middle of the titanium alloy sleeve (201).

2. The turbofan engine casing semi-composite material mounting seat according to claim 1, characterized in that: The outer shape of the titanium alloy sleeve (201) is configured as a frustum, and the titanium alloy sleeve (201) is threadedly connected to the interior of the internally threaded conical cylinder (103) via thread teeth.

3. The turbofan engine casing semi-composite material mounting seat according to claim 1, characterized in that: The inner diameter of the upper end of the internal threaded cone (103) is the same as the diameter of the top end of the titanium alloy sleeve (201), and the inner diameter of the lower end of the internal threaded cone (103) is the same as the diameter of the bottom end of the titanium alloy sleeve (201).

4. The turbofan engine casing semi-composite material mounting seat according to claim 1, characterized in that: The titanium alloy sleeve (201) is smeared with sealant on the contact surface where it is threadedly connected to the internal thread cone (103), and the interior of the groove ring (203) is fully coated with sealant.

5. The turbofan engine casing semi-composite material mounting seat according to claim 1, characterized in that: A threaded connection groove (202) is provided at the top end of the titanium alloy sleeve (201), and an inner hexagonal groove (204) is provided at the bottom end of the titanium alloy sleeve (201).

6. The turbofan engine casing semi-composite material mounting seat according to claim 1, characterized in that: It also includes a composite shell mold (3) and a composite mounting seat mold (5), wherein a backing plate (4) is fixedly adhered to the bottom of the composite shell mold (3), a sedimentation trough (6) is provided in the middle of the composite shell mold (3), and a through screw hole (7) is provided in the center of the sedimentation trough (6) of the composite shell mold (3).

7. The turbofan engine casing semi-composite material mounting seat according to claim 6, characterized in that: The composite mounting seat mold (5) includes a frustum mold (501), and the frustum mold (501) is fixedly attached to the center of the upper surface of the composite shell mold (3) by means of a hexagon socket bolt (502). The composite structure (1) is integrally cast by means of the composite shell mold (3) and the composite mounting seat mold (5).

Images