Positioning tool for machining arc end sealing groove of turbine retaining ring of medium and small gas turbine

Abstract

The utility model relates to a positioning tool, in particular to a positioning tool for machining arc end sealing grooves of turbine retaining rings of medium and small gas turbines. The utility model solves the problem that the existing small and medium-sized gas turbine retaining ring arc end cannot be directly clamped by simple tools such as a vise and the like when a radiant surface sealing groove is processed, so that the relative position accuracy of electric spark slotting of the sealing groove is ensured. A positioning plate is installed on a positioning seat and forms a vertical structure, a first cylindrical pin and a second cylindrical pin are horizontally inserted into the positioning plate, the face A1 of the arc end of a protective ring abuts against the first cylindrical pin, the face B of the arc end of the protective ring abuts against the second cylindrical pin, the face F of the arc end of the protective ring is fixed to the positioning plate, and a large pressing plate is installed on the face D of the arc end of the protective ring in a pressed mode. At the moment, the A2 face of the arc end of the protective ring swings to the position parallel to the bottom face of the positioning base, the A2 face of the plane to be machined of the arc end of the protective ring faces upwards, and then the sealing groove in the plane A2 to be machined can be machined. The tool is used for positioning the sealing groove at the arc end of the turbine retaining ring.

Description

Technical Field

[0001] The utility model relates to a positioning tool, in particular to a positioning tool used for machining arc end sealing grooves of turbine retaining rings of small and medium-sized combustion engines, belonging to the field of tooling. Background Art

[0002] Small and medium-sized gas turbines can be used in industrial power generation, ship power, pipeline boosting, distributed power generation and combined heat and power, etc. With the continuous development of small and medium-sized gas turbines, they are composed of about 20,000 parts, each of which plays a vital role in the performance of the entire gas turbine. Even the smallest parts and even the processing accuracy have an important impact on the performance of the entire gas turbine.

[0003] Among them, the turbine retaining ring of small and medium-sized gas turbines is composed of multiple annular arc ends. During assembly, the gaps between the arc ends need to be installed with sealing sheets to ensure the sealing effect. However, due to the irregular shape of the arc ends, it is impossible to ensure the relative position of the electric spark slotting of the sealing groove accurately by direct clamping with simple tools such as vises. This can easily affect the final molding size of the product and make it difficult to meet the assembly and sealing requirements.

[0004] In summary, the existing arc end of the turbine guard ring of small and medium-sized gas turbines cannot be directly clamped by simple tools such as vises when processing the radial surface sealing groove to ensure the accurate relative position of the electric spark grooving of the sealing groove. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that when machining the radial surface sealing groove of the turbine guard ring arc end of the existing small and medium-sized gas engine, it is impossible to rely on simple tools such as vises to directly clamp and ensure the accurate relative position of the electric spark grooving of the sealing groove, and further provide a positioning tool for machining the sealing groove of the turbine guard ring arc end of the small and medium-sized gas engine.

[0006] The technical solution of the utility model is:

[0007] A positioning tool for machining sealing grooves at arc ends of turbine retaining rings of small and medium-sized gas engines comprises a positioning seat, a positioning plate, a first cylindrical pin, a small pressure plate, a large pressure plate and a second cylindrical pin; the positioning plate is mounted on the positioning seat and forms a vertical structure, the first cylindrical pin and the second cylindrical pin are horizontally inserted on the positioning plate, the A1 surface of the arc end of the retaining ring is abutted against the first cylindrical pin, the B surface of the arc end of the retaining ring is abutted against the second cylindrical pin, the F surface of the arc end of the retaining ring is fixed on the positioning plate, and the large pressure plate is pressed on the D surface of the arc end of the retaining ring; at this time, the A2 surface of the arc end of the retaining ring is swung to a position parallel to the bottom surface of the positioning seat, and the surface A2 of the arc end of the retaining ring to be machined faces upward, so that the sealing groove on the surface A2 to be machined can be machined.

[0008] Furthermore, it also includes a plurality of screws, and the positioning plate is mounted on the positioning seat by means of the plurality of screws.

[0009] Preferably, keyways are symmetrically processed on two end surfaces on one side of the positioning plate.

[0010] Furthermore, it also includes a first bolt and a second bolt, the bolt head of the first bolt is against the positioning plate, the threaded portion of the first bolt is screwed on the small pressure plate, and the second bolt is screwed and passes through the small pressure plate and then screwed into the positioning plate.

[0011] Preferably, the first bolt is a hexagonal head full-thread bolt.

[0012] Preferably, the second bolt is a stud bolt, and the second bolt is fastened by a first flat washer and a first hexagonal nut.

[0013] Furthermore, the small pressure plate is pressed tightly against the C surface of the arc end of the guard ring.

[0014] Furthermore, it also includes a third bolt, a second flat washer and a second hexagonal nut. The lower part of the third bolt is against the keyway of the positioning plate, and the upper part of the third bolt is screwed through the large pressure plate and then tightened through the second flat washer and the second hexagonal nut.

[0015] Furthermore, it also includes a wedge block, which is inserted between the E surface of the arc end of the guard ring and the keyway of the positioning plate.

[0016] Compared with the prior art, the utility model has the following effects:

[0017] 1. The utility model can ensure the accurate position and phase of the sealing groove of the end face of the arc end of the guard ring during processing, and the arc end is installed stably. It cooperates with the sealing groove electrode to perform electric spark processing together, thereby ensuring the final molding size of the product.

[0018] 2. The utility model fixes and limits the arc end of the special-shaped guard ring on multiple planes to firmly fix it, thereby ensuring that the position and phase of the end face sealing groove of the radiation surface of the guard ring arc end are accurate during processing, and the arc end is installed stably. It can be used in an EDM machine with a sealing groove electrode to process the sealing groove of the arc end of the turbine guard ring of small and medium-sized gas engines.

[0019] 3. The utility model uses a large cylindrical pin on the positioning plate to locate the radiation surface on one side of the retaining ring arc end, and two small cylindrical pins to locate the outer circle of the retaining ring arc end, ensuring the uniqueness of the turbine retaining ring arc end in the tooling positioning position. The upper end surface D of the upper part of the retaining ring is located through two positioning points of a large pressure plate, and the two small pressure plates respectively press the lower upper end surface C of the positioning outer circle located by the two small cylindrical pins.

[0020] Since the arc end of the guard ring is an asymmetric structure, only one side of the bottom surface is fixed, and it is easy to tip over when pressed. Therefore, two keyways are opened on the positioning plate to pass the radiation surface, and auxiliary pads are installed in the keyways to prevent tipping and deformation. The overall positioning plate is processed symmetrically on both sides, and can be used symmetrically and universally to process the radiation surfaces on both sides of the arc end of the guard ring. The overall tool structure can ensure the accurate and stable positioning of the arc end of the guard ring, which can meet the installation and processing requirements.

[0021] 4. The positioning tool of the utility model has a simple structure, is easy to assemble and operate, and can meet the product process and technical requirements. Through the positioning tool, the position and phase of the end face sealing groove of the arc end radiation surface of the guard ring can be accurately processed, and the arc end can be installed stably. It can be used in an electric spark forming machine with a sealing groove electrode to process the sealing groove of the arc end radiation surface of the turbine guard ring of small and medium-sized gas engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the front view of the utility model; Figure 2 yes Figure 1 Rotated view along AA. DETAILED DESCRIPTION

[0023] Specific implementation method 1: Combination Figure 1 to Figure 2 The present embodiment is described, and the present embodiment includes a positioning seat 1, a positioning plate 3, a first cylindrical pin 4, a small pressure plate 5, a large pressure plate 6 and a second cylindrical pin 11; the positioning plate 3 is installed on the positioning seat 1 and forms a vertical structure, the first cylindrical pin 4 and the second cylindrical pin 11 are horizontally inserted on the positioning plate 3, the A1 surface of the arc end of the guard ring is abutted on the first cylindrical pin 4, the B surface of the arc end of the guard ring is abutted on the second cylindrical pin 11, the F surface of the arc end of the guard ring is fixed on the positioning plate 3, and the large pressure plate 6 is pressed on the D surface of the arc end of the guard ring. At this time, the A2 surface of the arc end of the guard ring is swung to a position parallel to the bottom surface of the positioning seat 1, and the plane A2 to be processed of the arc end of the guard ring faces upward, so that the sealing groove on the plane A2 to be processed can be processed.

[0024] When this embodiment is used, first fix the positioning plate 3 to the positioning seat 1 by the hexagon socket head screw 2 to form a vertical structure. Install the first cylindrical pin 4 and the second cylindrical pin 11 on the positioning plate 3. The arc end of the product guard ring is placed on the positioning plate 3, and the A1 surface of the arc end of the guard ring is positioned against the first cylindrical pin 4, and the B surface of the arc end of the guard ring is positioned against the second cylindrical pin 11. In this way, the A2 surface of the arc end of the guard ring can be placed parallel to the bottom surface of the positioning seat 1, and the sealing groove on the A2 plane can be processed.

[0025] Specific implementation method 2: Combination Figure 1 To explain this embodiment, this embodiment further includes a plurality of screws 2 , and the positioning plate 3 is mounted on the positioning seat 1 through the plurality of screws 2 .

[0026] Such arrangement is convenient for disassembly and assembly and can be reused. Other components and connection relationships are the same as those of the first embodiment.

[0027] Specific implementation method three: Combination Figure 2 To explain this embodiment, key grooves are symmetrically processed on two end surfaces of one side of the positioning plate 3 of this embodiment.

[0028] In this way, the positioning plate 3 in this embodiment is symmetrically designed. When processing the A1 plane, the other side elevation can be used for fixing, without changing the positions of the first cylindrical pin 4 and the second cylindrical pin 11, and the other components can be symmetrically installed to complete the processing of the sealing groove on the A1 plane. The other components and connection relationships are the same as those of the specific embodiment one or two.

[0029] Specific implementation method four: Combination Figure 2 To illustrate this embodiment, this embodiment also includes a first bolt 7 and a second bolt 10. The bolt head of the first bolt 7 is against the positioning plate 3, the threaded portion of the first bolt 7 is screwed onto the small pressure plate 5, and the second bolt 10 is screwed through the small pressure plate 5 and then screwed into the positioning plate 3.

[0030] In this arrangement, the first bolt 7 precisely limits the distance between the small pressure plate 5 and the positioning plate 3, and the second bolt 10 starts to press the C surface of the arc end of the guard ring. Other components and connection relationships are the same as those of the first, second or third specific embodiments.

[0031] Specific implementation method five: Combination Figure 2 The present embodiment will be described. The first bolt 7 of the present embodiment is a hexagonal head fully threaded bolt.

[0032] In this configuration, the bolt head plays a role in positioning and limiting, and the threaded portion plays a role in connecting and adjusting the distance between the small pressing plate 5 and the positioning plate 3. Other components and connection relationships are the same as those of the first, second, third or fourth embodiments.

[0033] Specific implementation method six: Combination Figure 2 To explain this embodiment, the second bolt 10 of this embodiment is a stud bolt, and the second bolt 10 is fastened by a first flat washer 8 and a first hexagonal nut 9 .

[0034] Such arrangement facilitates the connection and compression. Other components and connection relationships are the same as those of the first, second, third, fourth or fifth specific embodiments.

[0035] Specific implementation method seven: Combination Figure 2 To explain this embodiment, the small pressure plate 5 of this embodiment is pressed tightly against the C surface of the arc end of the guard ring.

[0036] In this configuration, the small pressure plate 5 is used to press the arc end C surface of the guard ring, and the small pressure plate 5 is fixed to the positioning plate 3 by means of hexagonal full-thread bolts, flat washers, hexagonal nuts, and stud bolts. Other components and connection relationships are the same as those of the specific embodiments one, two, three, four, five or six.

[0037] Specific implementation method eight: Combination Figure 2 To illustrate this embodiment, this embodiment further includes a third bolt 13, a second flat washer 14 and a second hexagonal nut 15.

[0038] The lower portion of the third bolt 13 is abutted against the keyway of the positioning plate 3 , and the upper portion of the third bolt 13 is screwed through the large pressing plate 6 and then tightened through the second flat washer 14 and the second hexagonal nut 15 .

[0039] In this configuration, the large pressing plate 6 is used to press the arc end D surface of the guard ring. The large pressing plate 6 has two pressing points and is fixed to the positioning plate 3 by the third bolt 13, the second flat washer 14, and the second hexagonal nut 15. Other components and connection relationships are the same as those of the specific embodiments one, two, three, four, five or six.

[0040] Specific implementation method nine: Combination Figure 2 To explain this embodiment, this embodiment further includes a wedge block 12 , which is inserted between the E surface of the arc end of the guard ring and the keyway of the positioning plate 3 .

[0041] In this arrangement, since the arc end of the guard ring is an atypical structure, only the F surface of the bottom surface can be fixed on the plane of the positioning plate 3, and the arc end of the guard ring is prone to tipping over when the D surface is pressed. A keyway structure is provided on the positioning plate 3, and an auxiliary pad 12 can be installed to support the E surface of the arc end of the guard ring, so that the overall structure is stable when the end surface of the guard ring is installed on the positioning tool. Other components and connection relationships are the same as those of the specific embodiments one, two, three, four, five or six.

[0042] Combination Figure 1 and Figure 2 Explain the working principle of the utility model:

[0043] When the utility model is used, the positioning plate 3 is first fixed to the positioning seat 1 by the hexagon socket head screw 2 to form a vertical structure. The first cylindrical pin 4 and the second cylindrical pin 11 are installed on the positioning plate 3. The arc end of the product guard ring is placed on the positioning plate 3, the A1 surface is positioned against the first cylindrical pin 4, and the B surface of the arc end of the guard ring is positioned against the second cylindrical pin 11, so that the A2 surface of the arc end of the guard ring can be placed parallel to the bottom surface of the positioning seat 1, and the sealing groove on the A2 plane is processed.

[0044] The fixing method of the arc end of the guard ring is: use a small pressure plate 5 to press the C surface of the arc end of the guard ring, and the small pressure plate 5 is installed and fixed on the positioning plate 3 through a hexagonal head full-thread bolt 7, a flat washer 18, a hexagonal nut 19, and a first stud bolt 10.

[0045] The large pressing plate 6 is used to press the arc end D surface of the guard ring. The large pressing plate 6 has two pressing points and is fixed on the positioning plate 3 by the third bolt 13 , the second flat washer 14 , and the second hexagonal nut 15 .

[0046] Since the arc end of the guard ring is an asymmetric structure, only the F surface of the bottom surface can be fixed on the plane of the positioning plate 3, and the arc end of the guard ring is prone to tipping over when the D surface is pressed. A keyway structure is provided on the positioning plate 3, and an auxiliary pad 12 can be installed to support the E surface of the arc end of the guard ring, so that the overall structure is stable when the end surface of the guard ring is installed on the positioning tool.

[0047] The tool positioning plate 3 is symmetrically designed. When processing the A1 plane, the other side vertical surface can be used for fixing without changing the positions of the first cylindrical pin 4 and the second cylindrical pin 11. The other components can be symmetrically installed to complete the processing of the sealing groove on the A1 plane.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A positioning tool for machining the arc end sealing groove of the turbine guard ring of small and medium-sized gas turbines, characterized in that: It comprises a positioning seat (1), a positioning plate (3), a first cylindrical pin (4), a small pressing plate (5), a large pressing plate (6) and a second cylindrical pin (11); The positioning plate (3) is mounted on the positioning seat (1) to form a vertical structure. The first cylindrical pin (4) and the second cylindrical pin (11) are horizontally inserted on the positioning plate (3). The A1 surface of the arc end of the guard ring is against the first cylindrical pin (4). The B surface of the arc end of the guard ring is against the two second cylindrical pins (11). The F surface of the arc end of the guard ring is fixed on the positioning plate (3). The large pressing plate (6) is pressed onto the D surface of the arc end of the guard ring. At this time, the A2 surface of the arc end of the guard ring is swung to a position parallel to the bottom surface of the positioning seat (1), and the surface A2 to be processed of the arc end of the guard ring faces upward, so that the sealing groove on the surface A2 to be processed can be processed.

2. A positioning tool for machining the arc end sealing groove of a turbine shroud of a small and medium-sized gas engine according to claim 1, characterized in that: It also includes a plurality of screws (2), and the positioning plate (3) is mounted on the positioning seat (1) via the plurality of screws (2).

3. A positioning tool for machining the sealing groove at the arc end of the turbine guard ring of a small and medium-sized gas engine according to claim 2, characterized in that: Keyways are symmetrically processed on two end surfaces of one side of the positioning plate (3).

4. A positioning tool for machining the arc end sealing groove of a turbine shroud of a small and medium-sized gas engine according to claim 3, characterized in that: It also includes a first bolt (7) and a second bolt (10), The bolt head of the first bolt (7) is abutted against the positioning plate (3), the threaded portion of the first bolt (7) is screwed onto the small pressure plate (5), and the second bolt (10) is screwed through the small pressure plate (5) and then screwed into the positioning plate (3).

5. A positioning tool for machining the sealing groove at the arc end of the turbine shroud of a small and medium-sized gas engine according to claim 4, characterized in that: The first bolt (7) is a hexagonal head full-thread bolt.

6. A positioning tool for machining the sealing groove at the arc end of the turbine shroud of a small and medium-sized gas engine according to claim 5, characterized in that: The second bolt (10) is a stud bolt, and the second bolt (10) is fastened by a first flat washer (8) and a first hexagonal nut (9).

7. A positioning tool for machining the sealing groove at the arc end of the turbine shroud of a small and medium-sized gas engine according to claim 4, characterized in that: The small pressing plate (5) is pressed tightly against the C surface of the arc end of the guard ring.

8. A positioning tool for machining the sealing groove at the arc end of the turbine shroud of a small and medium-sized gas engine according to claim 7, characterized in that: It also includes a third bolt (13), a second flat washer (14) and a second hexagonal nut (15), The lower part of the third bolt (13) is abutted against the keyway of the positioning plate (3), and the upper part of the third bolt (13) is screwed through the large pressing plate (6) and then tightened through the second flat washer (14) and the second hexagonal nut (15).

9. A positioning tool for machining the sealing groove at the arc end of the turbine shroud of a small and medium-sized gas engine according to claim 8, characterized in that: It also includes a wedge block (12) which is inserted between the E surface of the arc end of the guard ring and the keyway of the positioning plate (3).

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