Guider of air turbine starter

Abstract

The utility model provides a guider of an air turbine starter, which belongs to the field of turbine guiders and comprises a guider body, an inner ring is arranged on an inner ring of the guider body, an outer ring is arranged on an outer ring of the guider body, a plurality of fixing blocks are annularly arranged on the inner wall of the inner ring, and an annular groove is arranged on the outer side of the inner ring. The fixing grooves in the inner fixing ring are clamped with the fixing blocks on the inner wall of the inner ring, the connecting pins are inserted into the connecting holes and the hole grooves, threaded fixation of the inner fixing ring and the inner ring is completed, and the inner fixing ring is matched with the fixing holes in the surface to be in threaded fixation with a connecting structure of the air turbine starter. Therefore, the requirement for auxiliary fixing in the guider body is met conveniently, and the flexibility of the guider body in the installation process is improved.

Description

Technical Field

[0001] This utility model relates to the field of turbine guides, specifically a guide for an air turbine starter. Background Technology

[0002] An air turbine starter (hereinafter referred to as a starter) is a small-sized turbine starter that uses compressed air to drive the rotor of an engine gas generator during ground and air starting. A search reveals a guide for an air turbine starter disclosed in application number CN202322451729.8, which describes a guide body and multiple sets of blades. The inner ring of the guide body is an inner ring, and the outer ring is an outer ring. The outer ring of the outer ring is a mounting edge, and the axial shape of the mounting edge is five arc-shaped segments and one straight edge. The blades are axially evenly installed between the inner and outer flow channel surfaces. Two sets of stepped surfaces are provided at the rear of the guide body, and the rear center of the guide body is hollow. The leading edge of the blade is the airflow inlet. The guide is precision cast as a whole and adopts a simple one-ring structure. The bolt mounting holes make the assembly of the guide body with the starter convenient and quick. The cavity can reduce the overall weight. The overall flow organization is good, the strength is reliable, and it also has good corrosion resistance and wear resistance. However, the above description still has the following defects in actual use: the bolt fixing method can improve the convenience of installation, but the inner ring structure lacks an auxiliary fixing structure, which cannot adapt to the structural connection of some turbine starters. At the same time, the blade is not easy to disassemble and replace after long-term use. Therefore, it is necessary to design a guide for air turbine starters with strong practicality. Utility Model Content

[0003] The purpose of this invention is to provide a guide for an air turbine starter to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a guide for an air turbine starter, comprising: a guide body, wherein an inner ring is provided on the inner circumference of the guide body, an outer ring is provided on the outer circumference of the guide body, a plurality of fixing blocks are provided on the inner wall of the inner ring, and an annular groove is provided on the outer side of the inner ring.

[0005] An inner fixing ring has several fixing grooves on its side. The inner walls of the fixing grooves are engaged with the surfaces of several fixing blocks. The inner wall of the inner fixing ring has several arc-shaped slots. The inner walls of the arc-shaped slots have several connecting holes. The inner walls of the connecting holes are threaded to the slots on the surfaces of the fixing blocks via connecting pins. The surface of the inner fixing ring has several fixing holes.

[0006] The blade assembly includes a mounting ring installed on the inner wall of an annular groove. The mounting ring has several T-shaped elastic steels on its side. Each of the T-shaped elastic steels has a through groove at its other end. The edges of the T-shaped elastic steels have limiting protrusions. The surfaces of the T-shaped elastic steels are engaged with several snap-fit ​​grooves on the inner wall of the blade ring. The outer side of the blade ring has several stationary blades.

[0007] As a preferred embodiment of this utility model: the inner wall edge of the annular groove of the inner ring is provided with a threaded groove, the inner wall of the threaded groove is threadedly connected with a flow guide cap, the edge of the inner wall of the flow guide cap is provided with a first limiting ring, and one side of the first limiting ring is rotatably connected to the inner wall of the inner ring.

[0008] As a preferred embodiment of this utility model: a second limiting ring is fixedly connected to the inner wall of the other end of the inner ring, and the first limiting ring and the second limiting ring have the same thickness.

[0009] As a preferred embodiment of this utility model, a flow guiding cavity is provided between the outer wall of the inner ring and the inner wall of the outer ring.

[0010] As a preferred embodiment of the present invention, each of the aforementioned stationary blades is provided with an airflow inlet and an airflow outlet.

[0011] As a preferred embodiment of this utility model, the outer ring has a plurality of bolt mounting holes on its surface.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) By engaging several fixing slots on the inner fixing ring with several fixing blocks on the inner wall of the inner ring, and inserting several connecting pins into several connecting holes and slots, the inner fixing ring and the inner ring are threadedly fixed. Several fixing holes on the mating surface of the inner fixing ring are threadedly fixed to the connection structure of the air turbine starter, thereby facilitating the fulfillment of the requirements for auxiliary fixing inside the guide body and improving the flexibility of the guide body installation process.

[0014] (2) By applying partial pressure to the blade ring, several snap-fit ​​grooves on the inner wall of the blade ring are inserted and snapped into several T-shaped elastic steels. With the limiting protrusions on the edges of several T-shaped elastic steels, the blade ring and the mounting ring are limited and fixed, thus completing the installation and fixing of several stationary blades on the side of the inner ring and the blade ring. The inner wall of the flow guide cap is threaded and fixed to the threaded groove of the inner ring. With the first limiting ring, the blade ring is limited. Conversely, when the stationary blades need to be disassembled and replaced, the flow guide cap is removed and the operator uses a pry bar to remove the blade ring, thus improving the convenience of the device for installing and replacing stationary blades. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the inner fixing ring structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the blade assembly structure of this utility model.

[0018] In the diagram: 1. Guide body; 2. Inner ring; 21. Fixing block; 22. Annular groove; 23. Hole groove; 24. Flow guide cap; 25. First limiting ring; 26. Second limiting ring; 3. Outer ring; 31. Bolt mounting hole; 4. Inner fixing ring; 41. Fixing groove; 42. Arc-shaped slot; 43. Connecting hole; 44. Connecting pin; 45. Fixing hole; 5. Blade assembly; 51. Mounting ring; 52. T-shaped elastic steel; 53. Through groove; 54. Limiting protrusion; 55. Blade ring; 56. Snap-fit ​​groove; 57. Stationary blade. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Please see Figures 1-3 A guide for an air turbine starter includes: a guide body 1, an inner ring 2 is provided on the inner ring of the guide body 1, an outer ring 3 is provided on the outer ring of the guide body 1, a plurality of fixing blocks 21 are arranged in a ring on the inner wall of the inner ring 2, and an annular groove 22 is provided on the outer side of the inner ring 2.

[0021] Please see Figure 2 The inner fixing ring 4 has several fixing grooves 41 on its side. The inner walls of the fixing grooves 41 are engaged with the surfaces of several fixing blocks 21. The inner wall of the inner fixing ring 4 has several arc-shaped slots 42. The inner walls of the arc-shaped slots 42 have several connecting holes 43. The inner walls of the connecting holes 43 are threaded to the slots 23 on the surfaces of the fixing blocks 21 by connecting pins 44. The surface of the inner fixing ring 4 has several fixing holes 45.

[0022] In practical use: several fixing grooves 41 on the inner fixing ring 4 are engaged with several fixing blocks 21 on the inner wall of the inner ring 2, and several connecting pins 44 are inserted into several connecting holes 43 and slots 23 to complete the threaded fixation of the inner fixing ring 4 and the inner ring 2. Several fixing holes 45 on the mating surface of the inner fixing ring 4 are threadedly fixed to the connection structure of the air turbine starter, which facilitates the auxiliary fixation requirements inside the guide body 1, improves the flexibility of the guide body 1 installation process, and can be disassembled when the inner fixing ring 4 is not needed. After the first limiting ring 25 and the second limiting ring 26 are installed, they will limit the protruding parts of several fixing blocks 21 to avoid affecting the installation of the inner ring 2 itself.

[0023] Please see Figure 3 The blade assembly 5 includes a mounting ring 51 installed on the inner wall of the annular groove 22. The mounting ring 51 has several T-shaped elastic steels 52 on its side. The other end of each T-shaped elastic steel 52 is provided with a through groove 53. The edge of the T-shaped elastic steel 52 is provided with a limiting protrusion 54. The surface of the T-shaped elastic steel 52 is engaged with several snap-fit ​​grooves 56 provided on the inner wall of the blade ring 55. The outer side of the blade ring 55 is provided with several stationary blades 57.

[0024] The inner wall edge of the annular groove 22 of the inner ring 2 is provided with a threaded groove, and the inner wall of the threaded groove is threadedly connected to a flow guide cap 24. The edge of the inner wall of the flow guide cap 24 is provided with a first limiting ring 25, and one side of the first limiting ring 25 is rotatably connected to the inner wall of the inner ring 2.

[0025] In practical use: The operator applies partial pressure to the blade ring 55 using tools, causing several snap-fit ​​grooves 56 on the inner wall of the blade ring 55 to interlock with several T-shaped elastic steels 52. The limiting protrusions 54 on the edges of the T-shaped elastic steels 52 limit and fix the blade ring 55 to the mounting ring 51, thus completing the installation and fixation of the inner ring 2 and several stationary blades 57 on the side of the blade ring 55. The inner wall of the flow guide cap 24 is threaded to the threaded groove of the inner ring 2. The first limiting ring 25 limits the blade ring 55. Conversely, when it is necessary to disassemble and replace the stationary blades 57, the flow guide cap 24 is removed, and the operator uses a pry bar to remove the blade ring 55, improving the convenience of installing and replacing the stationary blades 57.

[0026] Please see Figure 2 , Figure 3 The inner wall of the other end of the inner ring 2 is fixedly connected to a second limiting ring 26, and the first limiting ring 25 and the second limiting ring 26 have the same thickness.

[0027] In practical use: the first limiting ring 25 and the second limiting ring 26 have the same thickness and are made of the same material, which facilitates the auxiliary limiting of several fixing blocks 21 on the inner wall of the inner ring 2, and avoids the protrusion of the fixing blocks 21 from affecting the installation and fixation of the connection structure between the inner ring 2 and the air turbine starter.

[0028] Please see Figure 1 A flow guide cavity is set between the outer wall of inner ring 2 and the inner wall of outer ring 3.

[0029] Each of the stationary blades 57 is equipped with an airflow inlet and an airflow outlet.

[0030] In practical use: the outer surface of the inner ring 2 is provided with an outer flow channel surface, the inner wall of the outer ring 3 is provided with an inner flow channel surface, and the area between the inner flow channel surface and the outer flow channel surface is a guide cavity. The airflow inlets and airflow outlets provided on several stationary blades 57 cooperate with each other to realize the air guiding performance of the internal structure of the guide body 1.

[0031] Please see Figure 2 The outer ring 3 has several bolt mounting holes 31 on its surface.

[0032] In practical use: the several bolt mounting holes 31 on the surface of the outer ring 3, together with several fixing bolts, facilitate the threaded fixing of the guide body 1 to the external connection structure of the air turbine starter, so as to facilitate its installation and disassembly.

[0033] In use, several fixing grooves 41 on the inner fixing ring 4 are engaged with several fixing blocks 21 on the inner wall of the inner ring 2, and several connecting pins 44 are inserted into several connecting holes 43 and slots 23 to complete the threaded fixation of the inner fixing ring 4 and the inner ring 2. Several fixing holes 45 on the mating surface of the inner fixing ring 4 are threadedly fixed to the connection structure of the air turbine starter, which facilitates the auxiliary fixation requirements inside the guide body 1. The inner fixing ring 4 can be disassembled when it is not needed. After the first limiting ring 25 and the second limiting ring 26 are installed, they will limit the protruding parts of several fixing blocks 21 to prevent the installation of the inner ring 2 from being affected. The operator uses tools to fix the blades. Applying partial pressure to the blade ring 55 causes several snap-fit ​​grooves 56 on the inner wall of the blade ring 55 to interlock with several T-shaped elastic steels 52. The limiting protrusions 54 on the edges of the T-shaped elastic steels 52 limit and fix the blade ring 55 to the mounting ring 51, thus completing the installation and fixation of the inner ring 2 and several stationary blades 57 on the side of the blade ring 55. The inner wall of the flow guide cap 24 is threaded to the threaded groove of the inner ring 2. The first limiting ring 25 limits the blade ring 55. Conversely, when it is necessary to disassemble and replace the stationary blades 57, the flow guide cap 24 is removed, and the operator uses a pry bar to remove the blade ring 55, improving the convenience of installing and replacing the stationary blades 57.

[0034] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 guide for an air turbine starter, characterized in that, include: The guide body (1) has an inner ring (2) on its inner ring and an outer ring (3) on its outer ring. The inner wall of the inner ring (2) is provided with a number of fixing blocks (21) and an annular groove (22) is provided on the outer side of the inner ring (2). An inner fixing ring (4) has several fixing grooves (41) on its side. The inner walls of the several fixing grooves (41) are engaged with the surfaces of several fixing blocks (21). The inner wall of the inner fixing ring (4) has several arc-shaped slots (42). The inner walls of the several arc-shaped slots (42) have several connecting holes (43). The inner walls of the several connecting holes (43) are threadedly connected to the slots (23) on the surfaces of the several fixing blocks (21) by connecting pins (44). The surface of the inner fixing ring (4) has several fixing holes (45). The blade assembly (5) includes a mounting ring (51) installed on the inner wall of the annular groove (22). The mounting ring (51) has several T-shaped elastic steels (52) on its side. The other end of each of the T-shaped elastic steels (52) is provided with a through groove (53). The edge of each T-shaped elastic steel (52) is provided with a limiting protrusion (54). The surface of each T-shaped elastic steel (52) is engaged with several snap-fit ​​grooves (56) provided on the inner wall of the blade ring (55). The outer side of the blade ring (55) is provided with several stationary blades (57).

2. The guide for an air turbine starter according to claim 1, characterized in that: The inner wall edge of the annular groove (22) of the inner ring (2) is provided with a threaded groove, and the inner wall of the threaded groove is threadedly connected to a flow guide cap (24). The edge of the inner wall of the flow guide cap (24) is provided with a first limiting ring (25), and one side of the first limiting ring (25) is rotatably connected to the inner wall of the inner ring (2).

3. The guide for an air turbine starter according to claim 2, characterized in that: The inner wall of the other end of the inner ring (2) is fixedly connected to a second limiting ring (26), and the first limiting ring (25) and the second limiting ring (26) have the same thickness.

4. The guide for an air turbine starter according to claim 1, characterized in that: A flow guide cavity is set between the outer wall of the inner ring (2) and the inner wall of the outer ring (3).

5. The guide for an air turbine starter according to claim 1, characterized in that: Each of the aforementioned stationary blades (57) is provided with an airflow inlet and an airflow outlet.

6. The guide for an air turbine starter according to claim 1, characterized in that: The outer ring (3) has several bolt mounting holes (31) on its surface.

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