Turbine guide vane assembly assembly device

Abstract

The present invention discloses an assembly device for a turbine guide vane assembly, comprising an assembly base, a protective clamp, and a claw structure. The assembly base comprises a positioning inner hole that cooperates with the first end of the inner ring of the inner casing, a first supporting surface that contacts the end face of the lower mounting groove of the inner casing, and a second supporting surface that contacts the end face of the lower mounting edge of the turbine guide vane. The protective clamp contacts the blades of the turbine guide vane to fix the positions of multiple turbine guide vanes. The claw structure comprises at least two claws, each comprising a force-applying end and a clamping end extending from the force-applying end toward a groove portion along the axial direction of the inner casing. The clamping end is a T-shaped structure comprising a vertical portion, a first transverse portion, and a second transverse portion. The inner surface of the vertical portion is a limiting cylindrical surface that cooperates with the outer circumference of the second end of the inner ring. The end face of the first transverse portion near the second end of the inner ring is a limiting supporting surface that abuts the inner ring end face. The second transverse portion engages with a groove in the groove portion when the claw moves radially outward along the inner casing. The assembly device improves assembly efficiency by over 30%.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine guide vane assembly assembly, in particular to a turbine guide vane assembly assembly device. Background Art

[0002] A certain type of aircraft engine high pressure turbine guide vane assembly as shown in the instruction manual Figure 1 , Attachment Figure 2 As shown, it includes a high-pressure turbine guide vane and a guide vane inner casing assembly, wherein the high-pressure turbine guide vane includes a U-shaped groove, an upper mounting edge, and a lower mounting edge; the guide vane inner casing assembly includes an inner casing and a positioning pin, and the inner casing has an upper mounting groove and a lower mounting groove.

[0003] During the assembly process of the high-pressure turbine guide vane assembly, multiple high-pressure turbine guide vanes need to be installed on the guide vane inner casing assembly in sequence, with the upper mounting edge and the lower mounting edge aligned with the upper mounting groove and the lower mounting groove respectively, and the mounting edges inserted into the mounting grooves; at the same time, every other U-shaped groove on the high-pressure turbine guide vane is aligned with the positioning pin on the inner casing assembly and inserted to fix the angular relationship.

[0004] The traditional assembly process of the high-pressure turbine guide vane assembly does not have a dedicated tooling design. The assembly workers need to install multiple high-pressure turbine guide vanes on the guide vane inner casing assembly by themselves and then tie them together with ropes, as shown in the attached manual. Figure 3 As shown, after the high-pressure turbine guide vane assembly is formed, it is integrally installed into the high-pressure turbine stator assembly.

[0005] Since there are assembly gaps between each high-pressure turbine guide vane and between the guide vane and the inner casing of the guide vane, the use of the above-mentioned rope bundling method for assembly will result in problems such as inaccurate positioning of components, low assembly efficiency, high difficulty in operation, and difficulty in pulling out the rope after the high-pressure turbine guide vane assembly is installed into the high-pressure turbine stator assembly.

[0006] Patent announcement number CN205097094U discloses an assembly fixture for a high-pressure turbine guide vane of an aircraft engine. The fixture consists of a base, a bearing, screws, a cover plate, a shaft, a support plate, a nut, and a positioning ring. The bearing is located at the center of the base; the cover plate is fixed to the base by screws; one end of the shaft is located in the bearing, and the other end is provided with a support plate; the positioning ring is fixed to the support plate by a nut. Although the patented technical solution is also intended to facilitate the assembly of the turbine guide vane, it is primarily designed to address the large size and heavy weight of the turbine guide vane. The assembly fixture is designed to reduce labor intensity and eliminate assembly safety hazards, but does not consider the positioning accuracy and convenience of the various components of the turbine guide vane during assembly. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a turbine guide vane assembly assembly device that improves the positioning accuracy and assembly efficiency of parts.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] A turbine guide assembly assembly device, the turbine assembly includes a guide inner casing assembly and multiple turbine guides, the guide inner casing assembly includes an inner casing and a positioning pin, the inner casing includes an upper mounting groove, a lower mounting groove, an inner ring and a groove portion located between the upper mounting groove and the inner ring, the turbine guide includes an upper mounting edge and a lower mounting edge, the lower mounting edge is provided with a U-shaped groove that is inserted and matched with the positioning pin on the inner casing, the assembly device includes an assembly base, a protective clamp and a claw structure; the assembly base is used to support the guide inner casing assembly and the turbine guide, the assembly base includes a positioning inner hole that is in contact with the first end portion of the inner ring of the inner casing, a first supporting surface that is in contact with the end face of the lower mounting groove of the inner casing, and a second supporting surface that is in contact with the end face of the lower mounting edge of the turbine guide; the protective clamp is an annular non-rigid part The protective clamp contacts the blades of the turbine guide so as to fix the position of multiple turbine guides assembled on the guide inner casing assembly; the claw structure is used to assist the assembled turbine guide assembly to be installed into the turbine stator assembly, and the claw structure includes at least two claws, the claw including a force-applying end and a clamping end extending from the force-applying end along the axial direction of the inner casing toward the groove portion, the clamping end is a T-shaped structure including a vertical portion, a first transverse portion and a second transverse portion, and there is space between the groove portion and the inner ring of the inner casing for the vertical portion to be inserted, the inner surface of the vertical portion is a limiting cylindrical surface that can cooperate with the outer periphery of the second end portion of the inner ring, the end face of the first transverse portion close to the second end portion of the inner ring is a limiting support surface that can fit with the end face of the inner ring, and the second transverse portion can be embedded in the groove of the groove portion when the claw moves radially outward along the inner casing.

[0010] Furthermore, the protective clamp is designed to extend from the exhaust side to the intake side of the turbine guide vane.

[0011] Furthermore, the contact end between the protective clamp and the turbine guide vane is a serrated structure.

[0012] Furthermore, the protective clamp is a nylon ring.

[0013] Furthermore, the claw structure includes a mounting ring, the force-applying end of the claw is provided with a bending structure hooked on the mounting ring, a waist hole is opened on the bending structure, and a connecting hole corresponding to the position of the waist hole is provided on the mounting ring. The claw structure also includes a connecting piece arranged in the waist hole and the connecting hole to stably connect the claw and the mounting ring.

[0014] Furthermore, when the connecting piece is located at the end of the waist hole close to the center of the receiver, the limiting cylindrical surface of the vertical portion is gap-matched with the outer periphery of the second end of the inner ring.

[0015] Furthermore, the number of the claws is three.

[0016] Furthermore, the three claws are evenly distributed on the mounting ring.

[0017] Furthermore, a handle is provided on the mounting ring for easy manual operation.

[0018] Furthermore, the handle is a crossbar that is colinear with the diameter of the mounting ring.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The assembly base is designed to position the inner casing to limit the radial movement of the inner casing. The first support surface and the second support surface provided on the assembly base are in contact with the inner casing and the lower end surface of the turbine guide respectively. The turbine guide can be gradually pushed toward the inner casing along the second support surface so that its U-shaped groove can be smoothly embedded in the positioning pin of the inner casing assembly; the protective clamp contacts the blades of multiple turbine guides to ensure that the turbine guide assembly does not become loose when assembled to the turbine stator assembly; after the clamping end of the claw in the claw structure is quickly positioned on the inner casing through the first transverse part, it is moved radially outward along the inner casing so that the second transverse part is smoothly inserted into the groove of the groove part, which facilitates the smooth grasping of the turbine guide assembly as a whole and installation on the turbine stator assembly.

[0021] The assembly device has a simple structure and is easy and reliable to operate. It can significantly reduce the operational difficulty of the assembly steps, shortening the original assembly time from 15 minutes to less than 10 minutes, and improving the assembly efficiency by at least 30%. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the parts of the turbine guide vane assembly of the present invention;

[0023] Figure 2 This is a schematic diagram of the assembly of parts of the turbine guide vane assembly of the present invention;

[0024] Figure 3 Schematic diagram of the assembly of the turbine guide vane assembly and the turbine stator assembly of the present invention;

[0025] Figure 4 This is a front view of the assembly device according to Example 1 of the present invention;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the assembly device according to Example 1 of the present invention;

[0027] Figure 6A top view of the clamping claw according to embodiment 1 of the present invention;

[0028] Figure 7 for Figure 6 Middle BB cross-section. DETAILED DESCRIPTION

[0029] In order to clearly illustrate the technical features of this solution, the technical solution is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0031] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] Example 1

[0035] like Figure 1 and Figure 2 The turbine assembly shown in FIG. 1 includes a guide inner casing assembly 1 and a plurality of turbine guides 2. The guide inner casing assembly 1 includes an inner casing 11 and a positioning pin 12. The inner casing includes an upper mounting groove 13, a lower mounting groove 14, an inner ring 15, and a groove portion 16 located between the upper mounting groove and the inner ring (the inner ring and the groove portion are shown in FIG. 1 ). Figure 4 As shown), the turbine guide 2 includes an upper mounting edge 21 and a lower mounting edge 22. The lower mounting edge 22 is provided with a U-shaped groove 23 that is inserted and matched with the positioning pin on the inner casing. Figure 3 As shown, the guide inner casing assembly 1 and the plurality of turbine guides 2 are assembled and need to be installed as a whole into the turbine stator assembly 3 .

[0036] Figure 4 and Figure 5 An assembly device for assembling the turbine guide vane assembly is shown. The assembly device includes an assembly base 4 , a protective clamp 5 and a claw structure 6 .

[0037] Among them, the assembly base 4 is used to support the guide inner casing assembly and the turbine guide, and the assembly base 4 includes a positioning inner hole 41 that cooperates with the first end of the inner casing inner ring 15, a first supporting surface 42 that contacts the end face of the lower mounting groove of the inner casing, and a second supporting surface 43 that contacts the end face of the lower mounting edge of the turbine guide; the positioning inner hole 41 is used to limit the radial movement of the inner casing 11, ensuring that the inner casing does not move during the assembly process, which is convenient for workers to assemble. After the inner casing 11 is placed on the assembly base 4, it is only necessary to place the turbine guide 2 on the second supporting surface 43 of the assembly base, align its U-shaped groove 23 with the positioning pin 12 on the inner casing assembly and push it radially along the inner casing 11 until the upper mounting edge 21 and the lower mounting edge 22 of the turbine guide are respectively inserted into the upper mounting groove 13 and the lower mounting groove 14 of the inner casing, and the U-shaped groove 23 is inserted into the positioning pin 12, thus completing the installation of a turbine guide assembly; the above operation is simple and can ensure the accurate positioning of each component.

[0038] like Figure 5 As shown, the protective clamp 5 is an annular, non-rigid component, preferably made of nylon to prevent scratching of components. The protective clamp contacts the blades of the turbine guide vanes to secure the position of multiple turbine guide vanes assembled on the guide vane inner casing assembly. After the multiple turbine guide vanes 2 are fully installed and the protective clamp 5 is attached, the turbine guide vanes 2 will not fall out when the turbine guide vane assembly 1 is lifted and installed into the turbine stator assembly 3. After the turbine guide vane assembly 1 and the turbine stator assembly 3 are installed, the protective clamp 5 can also be easily removed, avoiding the problem of difficulty in extracting the rope after the turbine guide vane assembly is installed into the turbine stator assembly during traditional assembly.

[0039] In order to increase the effective protection area of the protective clamp, the protective clamp 5 extends from the exhaust side of the turbine guide vane to the intake side; in addition, in order to avoid workpieces, the contact end between the protective clamp and the turbine guide vane is a serrated structure 51 that acts as an avoidance groove.

[0040] The claw structure 6 is used to assist in lifting the assembled turbine guide assembly and installing it into the turbine stator assembly, which can solve the problem of low efficiency and difficulty in installation when workers directly grab parts for installation in traditional operations. Figure 5 As shown, the claw structure includes a mounting ring 61 and three claws 62, and the three claws are evenly distributed on the mounting ring; the claw 62 includes a force-applying end and a clamping end extending from the force-applying end along the axial direction of the inner casing toward the groove portion; Figure 7As shown, the clamping end is a T-shaped structure including a vertical portion 621, a first transverse portion 622 and a second transverse portion 623. There is a space between the groove portion 16 of the inner casing and the inner ring 15 for the vertical portion to be inserted. The inner surface of the vertical portion 621 is a limiting cylindrical surface 6211 that can cooperate with the outer periphery of the second end portion of the inner ring. The end surface of the first transverse portion 622 close to the second end portion of the inner ring is a limiting support surface 6221 that can fit with the end surface of the inner ring. The second transverse portion 623 can be embedded in the groove of the groove portion 16 when the claw 62 moves radially outward along the inner casing 11.

[0041] like Figure 5 and Figure 6 As shown, the force-applying end of the claw 62 is provided with a bending structure 624 hooked on the mounting ring 61, a waist hole 6241 is provided on the bending structure 624, and a connecting hole corresponding to the position of the waist hole is provided on the mounting ring 61. The claw structure also includes a connecting piece 625 arranged in the waist hole and the connecting hole to stably connect the claw and the mounting ring. The connecting piece is generally a screw.

[0042] The limiting cylindrical surface 6211 on the vertical portion is used to determine the center position of the claw structure. When the claw moves radially inward along the mounting ring to the minimum position, the limiting cylindrical surface forms a positioning cylindrical surface that cooperates with the outer peripheral clearance of the second end of the inner ring of the inner casing, thereby achieving rough positioning of the claw structure. The limiting support surface 6221 on the first transverse portion is used to support the claw structure on the inner casing 11. On the one hand, this limiting support surface 6221 can determine the height position of the claw structure within the turbine guide assembly. When the claw is supported on the inner casing, the claw can just move radially outward to hook the inner casing, eliminating the need for workers to visually determine whether the claw has reached the working position, which facilitates operation. On the other hand, the three claws are supported in the same plane, making the process of pushing the claw to move more convenient and smoother.

[0043] When the screw is loosened, the claw can slide radially along the mounting ring, so that the second transverse portion of the clamping end of the claw extends into or out of the groove of the inner receiver groove, making it easier to hook or disengage the inner receiver.

[0044] like Figure 5 As shown, the mounting ring 61 is also provided with a handle 63 for facilitating manual operation. The handle of this embodiment is a cross bar that is collinear with the diameter of the mounting ring. Both ends of the cross bar are fixed to the mounting ring by screws. The cross bar is arranged radially to facilitate workers to lift the turbine guide assembly with uniform force, and the turbine guide assembly will not be deflected, which is beneficial to subsequent assembly operations.

[0045] Example 2

[0046] The difference between this embodiment and embodiment 1 is that: the number of claws in the claw structure is three, the three claws are unevenly distributed on the mounting ring, and the positions of the three claws on the mounting ring form an isosceles triangle structure.

[0047] Example 3

[0048] The difference between this embodiment and embodiment 1 is that the number of claws in the claw structure is three, the three claws are unevenly distributed on the mounting ring, and the positions of the three claws on the mounting ring form a right-angled triangle structure.

[0049] Example 4

[0050] The difference between this embodiment and embodiment 1 is that the number of claws in the claw structure is four, and the four claws are evenly distributed on the mounting ring.

[0051] Example 5

[0052] The difference between this embodiment and embodiment 1 is that the handle on the mounting ring is arranged on the upper surface of the mounting ring, the handle is a "door" shaped structure, there are two handles, and the two handles are symmetrically arranged on the mounting ring.

[0053] Obviously, the above embodiments are merely examples for the purpose of clearly illustrating the technical solutions of the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A turbine guide assembly assembly device, the turbine assembly comprising a guide inner casing assembly and a plurality of turbine guides, the guide inner casing assembly comprising an inner casing and a positioning pin, the inner casing comprising an upper mounting groove, a lower mounting groove, an inner ring, and a groove portion located between the upper mounting groove and the inner ring, the turbine guide comprising an upper mounting edge and a lower mounting edge, the lower mounting edge being provided with a U-shaped groove that engages with the positioning pin on the inner casing, characterized in that: The assembly device includes an assembly base, a protective clamp and a claw structure; the assembly base is used to support the guide inner casing assembly and the turbine guide, and the assembly base includes a positioning inner hole that cooperates with the first end of the inner ring of the inner casing, a first supporting surface that contacts the end face of the lower mounting groove of the inner casing, and a second supporting surface that contacts the end face of the lower mounting edge of the turbine guide; the protective clamp is an annular non-rigid part, and the protective clamp contacts the blades of the turbine guide so as to fix the position of multiple turbine guides assembled on the guide inner casing assembly; the claw structure is used to assist in the assembly of the turbine guide assembly The turbine stator assembly is installed, and the claw structure includes at least two claws, the claw including a force-applying end and a clamping end extending from the force-applying end along the axial direction of the inner casing toward the groove portion, the clamping end is a T-shaped structure including a vertical portion, a first transverse portion and a second transverse portion, and there is space between the groove portion and the inner ring of the inner casing for the vertical portion to be inserted, the inner surface of the vertical portion is a limiting cylindrical surface that can cooperate with the outer periphery of the second end portion of the inner ring, the end face of the first transverse portion close to the second end portion of the inner ring is a limiting support surface that can fit with the end face of the inner ring, and the second transverse portion can be embedded in the groove of the groove portion when the claw moves radially outward along the inner casing.

2. The turbine guide vane assembly assembly according to claim 1, wherein: The protective clamp is designed to extend from the exhaust side to the intake side of the turbine guide.

3. The turbine guide vane assembly assembly according to claim 1, wherein: The contact end between the protective clamp and the turbine guide vane is a sawtooth structure.

4. The turbine guide vane assembly assembly according to claim 1, wherein: The protective clamp is a nylon ring.

5. The turbine guide vane assembly assembly according to claim 1, wherein: The claw structure includes a mounting ring, a force-applying end of the claw is provided with a bending structure hooked on the mounting ring, a waist hole is opened on the bending structure, and a connecting hole corresponding to the position of the waist hole is provided on the mounting ring. The claw structure also includes a connecting piece arranged in the waist hole and the connecting hole to stably connect the claw and the mounting ring.

6. The turbine guide vane assembly assembly according to claim 5, characterized in that: When the connecting piece is located at the end of the waist hole close to the center of the casing, the limiting cylindrical surface of the vertical portion is in clearance fit with the outer periphery of the second end of the inner ring.

7. The turbine guide vane assembly assembly according to claim 5, characterized in that: The number of the claws is three.

8. The turbine guide vane assembly assembly according to claim 7, characterized in that: The three claws are evenly distributed on the mounting ring.

9. The turbine guide vane assembly assembly according to claim 5, characterized in that: The mounting ring is also provided with a handle for easy manual operation.

10. The turbine guide vane assembly assembly according to claim 9, characterized in that: The handle is a crossbar that is colinear with the diameter of the mounting ring.

Images