Adjustable gas turbine power turbine snap ring

Abstract

The utility model relates to the technical field of gas turbines, and discloses an adjustable gas turbine power turbine snap ring which comprises a snap ring body and further comprises a connecting piece, an opening is formed in the snap ring body, the first end of the connecting piece is fixedly connected with the first end of the snap ring body, and a first lock head is arranged at the end of the second end of the connecting piece. The end portion of the second end of the clamping ring body is provided with a second lock head matched with the first lock head, and the second end of the clamping ring body is provided with a sliding way matched with the second end of the connecting piece. The high-pressure secondary rear baffle can be conveniently installed, the stability and reliability of the high-pressure secondary rear baffle after installation can be guaranteed, and the service life of a power turbine of the gas turbine is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbines, in particular to an adjustable gas turbine power turbine clamping ring. Background Art

[0002] The primary function of a gas turbine's power turbine is to convert the energy of the high-temperature, high-pressure gas entering the gas turbine into mechanical energy for the power turbine. Gas turbine power turbines typically operate in a high-temperature, high-pressure environment. Due to their high speed and high power density, the power turbine's structural design demands higher standards, placing greater emphasis on material compatibility, and requiring structural reliability, stable operation, and a long service life.

[0003] At present, the high-pressure second-stage turbine disc includes an integrally formed turbine disc shaft and turbine disc. The front end of the turbine disc shaft is equipped with three grate discs. The front end face of the turbine disc is equipped with a high-pressure second-stage rear baffle through a retaining ring. The retaining ring presses the high-pressure second-stage rear baffle against the front end face of the turbine disc. Two axial grooves are provided on the side of the high-pressure second-stage rear baffle close to the turbine disc. The axial grooves can maintain good sealing with the turbine disc during operation. The corners of the inner diameter of the high-pressure second-stage rear baffle maintain a tight secondary circumferential fit with the inner side of the turbine disc.

[0004] There are at least the following problems in the prior art: the high-pressure secondary rear baffle of the micro gas turbine does not meet the operating stability requirements after being assembled with an ordinary clamping ring, the reliability of the structure cannot be guaranteed, the service life is greatly reduced, and it may even affect the normal operation of other structures. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model develops an adjustable gas turbine power turbine retaining ring. The utility model can facilitate the installation of the high-pressure secondary rear baffle, and ensure the stability and reliability of the high-pressure secondary rear baffle after installation, thereby effectively improving the service life of the gas turbine power turbine.

[0006] The technical solution to the technical problem solved by the utility model is: an adjustable gas turbine power turbine clamping ring, including a clamping ring body and a connecting piece, the clamping ring body is provided with an opening, the first end of the connecting piece is fixedly connected to the first end of the clamping ring body, the end of the second end of the connecting piece is provided with a first locking head, the end of the second end of the clamping ring body is provided with a second locking head that cooperates with the first locking head, and the second end of the clamping ring body is provided with a slide that cooperates with the second end of the connecting piece.

[0007] As an optimization, a baffle is provided on the inner side of the slideway. By providing the baffle, the sliding trajectory of the connecting piece can be determined when it is retracted, preventing the connecting piece from being directly folded inward and damaged.

[0008] As an optimization, bosses are provided on the first side of the retaining ring body and the first side of the connector, and the inner sides of the bosses are chamfered. The bosses allow the disc to abut against the sidewalls of the circumferential groove of the turbine disc when retracted, and to slide out along the sidewalls of the circumferential groove of the turbine disc when extended. The chamfers ensure that the bosses slide into the circumferential groove of the turbine disc when retracted, eliminating the need for inward adjustment.

[0009] As an optimization, a support plate is provided on the second side of the clamping ring body. By providing the support plate, it can abut against the inner side of the high-pressure secondary rear baffle when it is expanded and restored, thereby tensioning the high-pressure secondary rear baffle.

[0010] As an optimization, the second side of the retaining ring body and the second side of the connecting member are both chamfered. The chamfers ensure that after the boss expands outward and separates from the sidewall of the turbine disk's circumferential groove, the chamfers can intersect and slide outward along the chamfered structure on the high-pressure second-stage rear baffle, defining the expansion trajectory of the retaining ring body.

[0011] As an optimization, the outer wall of the retaining ring body is provided with several groups of grooves. The grooves are arranged to correspond with the notches on the circumferential groove of the turbine disk, making it easier to adjust the shape of the complete retaining ring with the help of auxiliary tools.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By setting a connecting piece, the clamping ring body can be closed and cooperated with the clamping ring body to form a complete clamping ring, and it can be freely adjusted so that the clamping ring body can shrink inward and expand outward to restore. In the retracted state, the high-pressure secondary rear baffle can be conveniently installed so that the high-pressure secondary rear baffle passes through the complete clamping ring and contacts the front end face of the turbine disc. In the expanded state, the complete clamping ring can tension and lock the high-pressure secondary rear baffle, and press the high-pressure secondary rear baffle against the front end face of the turbine disc to ensure the operational stability and reliability after assembly; by setting the first lock head and the second lock head, the shape of the complete clamping ring can be determined to avoid excessive expansion; by setting the slideway, the sliding trajectory of the connecting piece can be determined, so that the clamping ring body can undergo stable elastic deformation to avoid inelastic deformation of the connecting piece and the clamping ring body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Figure 2 for Figure 1 A partial enlarged view of area A in the middle.

[0016] Figure 3 for Figure 1 A partial enlarged view of area B in the middle.

[0017] Figure 4This is a cross-sectional view of an embodiment of the utility model after installation.

[0018] Figure 5 for Figure 4 A partial enlarged view of the middle C area.

[0019] Figure 6 This is a schematic diagram of the mounting process of the retaining ring body, turbine disc and high-pressure secondary rear baffle in one embodiment of the present invention.

[0020] In the figure: 1. Snap ring body; 2. Connector; 3. First lock head; 4. Second lock head; 5. Slide; 6. Baffle; 7. Boss; 8. Chamfer; 9. Support plate; 10. Chamfer; 11. Groove; 12. Turbine disc; 13. High-pressure secondary rear baffle. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0022] Example 1

[0023] Figures 1 to 6 An embodiment of the present invention is as follows: Figures 1 to 6 As shown, an adjustable gas turbine power turbine clamping ring includes a clamping ring body 1 and a connecting member 2. The clamping ring body 1 is provided with an opening. The first end of the connecting member 2 is fixedly connected to the first end of the clamping ring body 1. The clamping ring body 1 and the connecting member 2 are integrally formed. The end of the second end of the connecting member 2 is provided with a first lock head 3, the end of the second end of the clamping ring body 1 is provided with a second lock head 4 that cooperates with the first lock head 3, and the second end of the clamping ring body 1 is provided with a slide 5 that cooperates with the second end of the connecting member 2.

[0024] By providing the connecting piece 2, the clasp ring body 1 can be closed and cooperated with the clasp ring body 1 to form a complete clasp ring, which can be freely adjusted so that the clasp ring body 1 can be retracted inwardly and expanded outwardly to restore. In the retracted state, the high-pressure secondary rear baffle 13 can be easily installed so that the high-pressure secondary rear baffle 13 passes through the complete clasp ring and contacts the front end surface of the turbine disk 12. In the expanded state, the complete clasp ring can tighten and lock the high-pressure secondary rear baffle 13 and press the high-pressure secondary rear baffle 13 against the front end surface of the turbine disk 12, ensuring the operational stability and reliability after assembly, ensuring the connection between the high-pressure secondary rear baffle 13 and the turbine disk 12 and maintaining a high degree of coaxiality, and having a good sealing effect, which can ensure that the energy of the high-temperature and high-pressure gas at the turbine inlet is efficiently converted into kinetic energy of the power turbine and output mechanical energy; by providing the first lock head 3 and the second lock head 4, the shape of the complete clasp can be determined to avoid excessive expansion; by providing the slideway 5, the sliding trajectory of the connecting piece 2 can be determined, so that the clasp ring body 1 undergoes stable elastic deformation and avoids inelastic deformation of the connecting piece 2 and the clasp ring body 1.

[0025] like Figure 2 As shown, a baffle 6 is provided on the inner side of the slideway 5. By providing the baffle 6, the sliding track of the connecting member 2 when it is retracted can be determined, thereby preventing the connecting member 2 from being directly folded inward and damaged.

[0026] like Figure 3 As shown, the first side of the retaining ring body 1 and the first side of the connecting member 2 are both provided with a boss 7, and the inner side of the boss 7 is provided with a chamfer 8. The provision of the boss 7 allows for better fit with the turbine disk 12. When the retaining ring body 1 is retracted, it abuts against the sidewall of the circumferential groove of the turbine disk 12, and when extended, it can slide out along the sidewall of the circumferential groove of the turbine disk 12. The provision of the chamfer 8 ensures that the boss 7 can slide into the circumferential groove of the turbine disk 12 when retracted, without the need for special inward pushing and adjustment.

[0027] like Figure 2 and Figure 3 As shown, a support plate 9 is provided at the inner side wall edge of the second side of the clamping ring body 1. By providing the support plate 9, it can abut against the inner side of the high-pressure secondary rear baffle 13 when it is expanded and restored, thereby tensioning the high-pressure secondary rear baffle 13.

[0028] like Figure 3 As shown, the second side of the retaining ring body 1 and the second side of the connecting member 2 are both provided with chamfers 10. The provision of the chamfers 10 allows, after the boss 7 is expanded outward and separated from the sidewall of the circumferential groove of the turbine disk 12, the chamfers 10 to be tangential to the chamfer structure on the high-pressure secondary rear baffle 13 and to continue sliding outward along the chamfer structure. When the chamfer 10 is separated from the chamfer structure on the high-pressure secondary rear baffle 13, the retaining ring body 1 is inserted between the turbine disk 12 and the high-pressure secondary rear baffle 13, and they fit tightly together.

[0029] like Figure 3 As shown, the lowest point of the chamfer 10 is aligned with the highest point of the fillet 8. This ensures that the boss 7 can extend from the circumferential groove of the turbine disk 12 without getting stuck.

[0030] like Figure 1 and Figure 3 As shown, the outer wall of the retaining ring body 1 is provided with a plurality of grooves 11. By providing the grooves 11, they can correspond to the notches on the circumferential groove of the turbine disk 12, making it convenient to adjust the shape of the complete retaining ring with the help of auxiliary tools.

[0031] like Figure 4 、 Figure 5 and Figure 6As shown, when in use, first use the installation tool to install the complete snap ring into the circumferential groove of the turbine disk 12. The complete snap ring in the expanded state cannot fall out of the circumferential groove; then pass the auxiliary tool through the notch and probe into the groove 11, and compress the snap ring body 1, separate the first lock head 3 and the second lock head 4, and the connecting piece 2 slides along the baffle in the slideway 5, so that the snap ring body 1 is completely retracted into the circumferential groove of the turbine disk 12. At this time, the boss 7 abuts the side wall of the circumferential groove of the turbine disk 12; then pass the high-pressure secondary rear baffle 13 through the complete snap ring and abut against the turbine disk 12. At this time, release the auxiliary tool, and the snap ring body 1 begins to expand outward and recover. The snap ring body 1 first slides out along the side wall of the circumferential groove of the turbine disk 12 through the boss 7, as shown in FIG. Figure 6 As shown, the clamping ring body 1 continues to slide outward through the chamfer 10 and the chamfer structure on the high-pressure secondary rear baffle 13. When the chamfer 10 is separated from the chamfer structure on the high-pressure secondary rear baffle 13, the clamping ring body 1 is inserted between the turbine disc 12 and the high-pressure secondary rear baffle 13; until the first lock head 3 and the second lock head 4 abut, the clamping ring body 1 locks the high-pressure secondary rear baffle 13 and presses it on the turbine disc 12, and the support plate 9 tensions the high-pressure secondary rear baffle 13 from the inside to the outside, so that the high-pressure secondary rear baffle 13 and the turbine disc 12 meet the sealing requirements; the utility model can facilitate the installation of the high-pressure secondary rear baffle 13, and ensure the stability and reliability of the high-pressure secondary rear baffle 13 after installation, thereby effectively improving the service life of the gas turbine power turbine.

[0032] The descriptions of the orientation or relative position relationship of the structure in the present invention, such as the orientation or relative position relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

Claims

1. An adjustable gas turbine power turbine retaining ring, comprising a retaining ring body (1), characterized in that: The invention also includes a connecting piece (2), an opening is provided on the snap ring body (1), a first end of the connecting piece (2) is fixedly connected to the first end of the snap ring body (1), a first locking head (3) is provided at the end of the second end of the connecting piece (2), a second locking head (4) matched with the first locking head (3) is provided at the end of the second end of the snap ring body (1), and a slideway (5) matched with the second end of the connecting piece (2) is provided at the second end of the snap ring body (1).

2. The adjustable gas turbine power turbine retaining ring according to claim 1, characterized in that: A baffle (6) is provided on the inner side of the slideway (5).

3. The adjustable gas turbine power turbine retaining ring according to claim 2, characterized in that: A boss (7) is provided on the first side of the clamping ring body (1) and the first side of the connecting piece (2), and a chamfer (8) is provided on the inner side of the boss (7).

4. The adjustable gas turbine power turbine retaining ring according to claim 3, characterized in that: A support plate (9) is provided on the second side of the clamping ring body (1).

5. The adjustable gas turbine power turbine retaining ring according to any one of claims 1 to 4, characterized in that: The second side of the clamping ring body (1) and the second side of the connecting piece (2) are both provided with chamfers (10).

6. The adjustable gas turbine power turbine retaining ring according to claim 5, characterized in that: A plurality of groups of grooves (11) are provided on the outer side wall of the ring body (1).

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