Axial locking structure for compressor blade

Abstract

The invention discloses a compressor blade axial locking structure, and relates to the technical field of gas turbine design. The impeller specifically comprises an impeller disc, blades, a check ring and a locking part between the impeller disc and the check ring, the root of each blade is a tenon, a plurality of mortises matched with the tenons are formed in the outer edge of the impeller disc, and the blades and the impeller disc are installed in a matched mode. The check ring is installed on the axial air outlet side of the wheel disc and used for limiting axial movement of the blades, the locking part is used for detachably connecting the check ring and the wheel disc, the locking part comprises a check ring locking block or a check ring hole on the check ring, and further comprises a lock head and a spring, and the outer edge, close to the check ring, of the wheel disc is provided with straight holes which are perpendicularly communicated with each other. And the wheel disc is detachably connected with the check ring by matching with the locking part. The axial locking structure of the compressor blade is easy to machine, few in assembly parts, convenient to disassemble and assemble and easy to repair after being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine design, and in particular to an axial locking structure for compressor blades. Background Art

[0002] During operation, the compressor blades of a heavy-duty gas turbine are connected to the mortise and tenon grooves on the outer edge of the disc via a tenon joint, transferring the loads acting on the blades to the disc. The tenon-mortise joint structure must not only possess sufficient strength and appropriate rigidity to avoid excessive stress concentration, but also be simple for easy machining, assembly, disassembly, and replacement.

[0003] Axial dovetail joints are widely used in heavy-duty gas turbine compressor blades, steam turbine blades, and aircraft engine fans. The dovetail joint is mounted on the disc through a corresponding groove on the outer edge of the disc. This dovetail joint-groove structure requires a locking mechanism to restrict axial movement while also ensuring ease of assembly and disassembly.

[0004] Currently common locking structures include: (1) processing ear pieces before and after the tenon groove of the wheel disc, and limiting the axial displacement of the tenon by installing front and rear baffles, but the ear pieces need to be processed in a circle and the structure is complex and difficult to process; (2) opening a keyway perpendicular to the tenon groove on the wheel disc and the blade root, inserting a locking block into the keyway to limit the axial displacement of the tenon, but the keyway and the locking block are difficult to process, and the last two locking blocks need to be bent using specific tools, which makes disassembly and assembly inconvenient; (3) using a spring 4 at the bottom of the tenon to lift the stop pin to limit the axial displacement of the tenon. This method has a simple structure, but the tenon and tenon groove of each blade need to be drilled, and each blade needs to be locked separately. There are many locking parts, and installation and removal are troublesome.

[0005] Existing patent CN116263170A discloses a vibration-damping and axial locking structure for compressor blades and disks. The disk is provided with a circumferential through-groove and non-through-grooves on either side of the blade root. When the rotor blades are installed on the disk, the non-through-grooves cooperate with the circumferential through-grooves to form locking grooves. This technical solution employs a graphic shape for the through-grooves, making fabrication difficult. Each blade is individually locked, making installation and removal cumbersome.

[0006] Existing patent CN115419470A discloses a rotor blade axial limit structure, including a wheel disc, a rotor blade, and a limit collar. A tenon groove is provided on the tenon of the rotor blade. The groove on the wheel disc and the tenon groove on the rotor blade are aligned in the axial direction to form a complete annular groove structure; the limit collar is clamped into the annular groove structure. In this technical solution, a groove is machined on each blade and a groove is machined on the wheel disc, which is difficult to process.

[0007] In summary, the above-mentioned existing patents are all aimed at solving the problems in the prior art of the compressor blade axial locking structure being difficult to manufacture, having many locking parts, and being inconvenient to disassemble and assemble. Summary of the Invention

[0008] The present invention provides an axial locking structure for compressor blades, which solves the problems in the prior art of difficult processing, many locking parts and inconvenient assembly and disassembly of the axial locking structure for compressor blades.

[0009] To achieve the above objectives, the present invention proposes an axial locking structure for compressor blades. The specific technical solution is as follows:

[0010] A compressor blade axial locking structure includes a wheel disc, blades, a retaining ring and a locking part between the wheel disc and the retaining ring, wherein the blades are mounted on the outer edge of the wheel disc, the retaining ring is mounted on the axial air outlet side of the wheel disc, the retaining ring is used to limit the axial movement of the blades, the locking part is used to detachably connect the retaining ring and the wheel disc, and a hole and a groove that cooperate with the locking part are opened on the side of the outer edge of the wheel disc close to the retaining ring.

[0011] Furthermore, the locking part includes a first locking portion and a second locking portion, the first locking portion is arranged on the retaining ring, and the second locking portion is arranged on the wheel disc, and the first locking portion and the second locking portion are detachably connected.

[0012] Furthermore, the first locking portion includes a retaining ring locking block provided on one side of the retaining ring, and the second locking portion includes an elastic component and a locking head.

[0013] Furthermore, a locking groove is provided on one side of the retaining ring lock block close to the axis, and a locking head hole is provided on the locking head.

[0014] Furthermore, a slot is provided on one side of the retaining ring lock block close to the axis, and the lock head is convex.

[0015] Furthermore, the retaining ring locking block is provided with a through locking block hole along the circumferential direction, and the locking head is convex.

[0016] Furthermore, a straight groove is provided on the retaining ring locking block and passes through the retaining ring in the axial direction.

[0017] Furthermore, mutually perpendicular holes are opened on one side of the outer edge of the wheel disc close to the retaining ring, and the mutually perpendicular holes are used to insert the first locking part and the second locking part respectively, and the first locking part and the second locking part are clamped to each other in the mutually perpendicular holes.

[0018] Furthermore, the mutually perpendicular holes include radial holes and axial holes.

[0019] Furthermore, the mutually perpendicular holes also include circumferential holes.

[0020] Furthermore, the first locking portion includes a retaining ring hole radially extending through the retaining ring, and the second locking portion includes a spring and a locking head.

[0021] Furthermore, a straight hole is provided from one side of the retaining ring hole to the edge of the retaining ring, and the lock head is convex in shape.

[0022] Furthermore, a radial hole is provided on the outer edge of the wheel disc near the side of the retaining ring, a circumferential groove is provided on the wheel disc and the blade heel, the spring and the lock head are arranged in the radial hole, and the retaining ring is inserted into the circumferential groove.

[0023] Furthermore, the axial width of the retaining ring is less than one tenth of the axial width of the wheel disc.

[0024] Furthermore, the retaining ring includes a segmented retaining ring and a full-ring retaining ring, the segmented retaining ring includes at least two segments, and the full-ring retaining ring is annular.

[0025] Furthermore, the number of the first locking parts on the segmented retaining ring is at least 1, and the number of the first locking parts on the full-ring retaining ring is at least 2.

[0026] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0027] 1. The present invention proposes an axial locking structure for compressor blades. The retaining ring and locking parts have simple structures. At the same time, the holes on the wheel are all straight holes, which are easy to process.

[0028] 2. The present invention proposes an axial locking structure for compressor blades. The number of locking parts between the retaining ring and the wheel disc can be increased or decreased according to the magnitude of the axial force of the blades. At least two sets of locking parts are provided to limit the axial movement of the blades on the entire rotor. The number of locking parts is reduced, the assembly amount is reduced, and disassembly and installation are facilitated.

[0029] 3. The present invention proposes an axial locking structure for compressor blades. When the retaining ring and the locking head are damaged, the locking parts of the damaged part can be replaced or converted into a segmented retaining ring according to the actual situation, thereby simplifying the repair process and eliminating the need to reprocess the retaining ring.

[0030] 4. The present invention proposes an axial locking structure for compressor blades, which adjusts the thickness of the retaining ring or processes grooves on the front end of the wheel disc and the moving blade for installing the retaining ring to avoid interference between the retaining ring and the adjacent rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 A schematic diagram of an axial locking structure for compressor blades provided by the present invention;

[0033] Figure 2 Schematic diagram of the structure of the retaining ring in Example 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the wheel opening in Example 1 of the present invention;

[0035] Figure 4 This is a schematic structural diagram of the lock in Example 1 of the present invention;

[0036] Figure 5 This is a schematic diagram of the installation of the compressor blade axial locking structure in Example 1 of the present invention;

[0037] Figure 6 This is a schematic structural diagram of the lock in Example 2 of the present invention;

[0038] Figure 7 This is a schematic diagram of the installation of the compressor blade axial locking structure in Example 2 of the present invention;

[0039] Figure 8 This is a schematic diagram of the structure of the wheel opening in Example 3 of the present invention;

[0040] Figure 9 This is a schematic structural diagram of the lock in Example 3 of the present invention;

[0041] Figure 10 Schematic diagram of the structure of the retaining ring in Example 3 of the present invention;

[0042] Figure 11 This is a schematic diagram of the installation of the compressor blade axial locking structure in Example 3 of the present invention;

[0043] Figure 12 Schematic diagram of the structure of the lock ring in Example 4 of the present invention;

[0044] Figure 13 This is a schematic diagram of the structure of the wheel opening in Example 4 of the present invention;

[0045] Figure 14 This is a schematic diagram of the installation of the compressor blade axial locking structure in Example 4 of the present invention.

[0046] Figure markings: 1-wheel disc, 2-blade, 3-retaining ring, 4-spring, 5-locking head, 11-radial hole, 12-axial hole, 13-circumferential hole, 14-axial groove, 31-retaining ring locking block, 32-slot, 33-locking block hole, 34-retaining ring hole, 51-locking head hole, 52-locking head hole. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below with reference to specific examples. These examples should not be construed as limiting the scope of protection claimed in the present invention.

[0048] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] In order to solve the problems in the prior art that compressor blades need to be axially locked and their locking structures are difficult to manufacture, have many locking parts, and are inconvenient to disassemble and assemble, the present invention proposes an axial locking structure for compressor blades.

[0050] Example 1

[0051] This embodiment proposes a compressor blade axial locking structure, see Figure 1 As shown, it includes a disc 1, blades 2, a retaining ring 3, and a locking component between the disc 1 and the retaining ring 3. The root of the blade 2 is configured as a tenon, and the outer edge of the disc 1 is provided with multiple tenons that match the tenons. The blades 2 and the disc 1 are assembled together through the tenons and the tenons. The retaining ring 3 is installed on the axial outlet side of the disc 1 to limit the axial movement of the blades 2 caused by the high-temperature airflow. The locking component is used to detachably connect the retaining ring 3 and the disc 1. The locking component includes a retaining ring lock block 31, a lock head 54, and a spring 45.

[0052] For details, see Figure 2 As shown, a retaining ring locking block 31 is provided on one side of the retaining ring 3, and a retaining groove 32 is provided on the radially inner side of the retaining ring locking block 31. Retaining ring 3 is used to limit the axial movement of blade 1. Therefore, its radius is greater than the distance from the bottom of the tenon of blade 2 to the center of the disc 1, and less than the distance from the top of the tenon of blade 2 to the center of the disc 1. Retaining ring 3 is installed in the gap between the impeller and the stationary impeller. Due to limited installation space, the thickness of retaining ring 3 needs to be less than the gap distance. If the gap is too small, grooves can be machined on the edges of the disc and blades to facilitate the installation of retaining ring 3.

[0053] Optionally, since the rotor can be a full-section rotor or a segmented rotor, the retaining ring 3 can be configured as a segmented or full-circle type. If configured as a segmented type, the retaining ring 3 can be divided into at least two sections; if configured as a full-circle type, the retaining ring 3 can be a single ring or a non-single ring, and only needs to block the tenons of all blades 2 in the axial direction.

[0054] Optionally, the number of retaining ring locking blocks 31 on the retaining ring 3 can be increased or decreased based on the magnitude of the blade axial force. A full-ring retaining ring has a minimum of two retaining ring locking blocks 31, while a segmented retaining ring has a minimum of one retaining ring locking block 31. The retaining ring locking blocks are welded vertically to the side of the retaining ring 3 closest to the wheel disc 1.

[0055] Optionally, the retaining ring 3 and the retaining ring locking block 31 are two independent parts. If the retaining ring locking block 31 is damaged, the damaged retaining ring locking block 31 can be cut off separately and the intact retaining ring locking block 31 can be re-welded; the retaining ring at the damaged part can also be cut off, and a section of the retaining ring can be reprocessed and welded to the original retaining ring. The removed retaining ring can be re-welded with the retaining ring locking block 31 and used as a segmented retaining ring.

[0056] For details, see Figure 3 As shown, radial holes 11 and axial holes 11 are opened on the outer edge of the wheel disc 1. Both radial holes 11 and axial holes 11 are straight holes, which are easy to process. The radial holes 11 and axial holes 11 are perpendicular to each other, and the axial hole 11 corresponds to the middle of the radial holes 11. Figure 4 As shown, the lock 5 is shaped like a rectangular parallelepiped, slightly smaller than the radial hole 11 of the wheel disc 1 and capable of being inserted into the radial hole 11. A through lock hole 51 is defined in the middle of the lock 5. The spring 4 and lock 5 are sequentially placed in the radial hole 11 of the wheel disc 1. The length of the spring 4 and the height of the lock 5 must be appropriately configured. When the lock 5 is not pressed, the height of the lock hole 51 is higher than the axial hole 11 of the wheel disc 1. When the lock 5 is pressed, the lock hole 51 and the axial hole 11 of the wheel disc 1 are aligned. The lock hole 51 is slightly larger than the retaining ring lock block, allowing the retaining ring lock block to pass through it. At the same time, the retaining ring lock block has a wider slot width than the lock hole 51, allowing the lock 5 and retaining ring lock block to engage with each other.

[0057] The installation method of the above locking structure is as follows: after all blades 2 are installed on the wheel disc, press the lock head 5 and the spring 4 is compressed, so that the lock head hole 51 on the lock head 5 is aligned with the axial hole 11 of the wheel disc 1, and the retaining ring locking block of the retaining ring 3 is inserted into the axial hole 11. At this time, the card groove on the retaining ring locking block is aligned with the lock head hole 51 on the lock head 5, and the lock head 5 spring 4 is released to push the lock head 5 up. The lock head hole 51 on the lock head 5 and the card groove on the retaining ring locking block are stuck with each other. The lock head 5 limits the axial movement of the retaining ring 3, and the retaining ring 1 limits the radial movement of the lock head 5. For the installation status, refer to Figure 5 shown.

[0058] Example 2

[0059] This embodiment also proposes an axial locking structure for compressor blades. The technical solution of this locking structure differs from that of embodiment 1 in the following aspects:

[0060] See Figure 6As shown, the lock head 5 is convex in shape, with its lower end slightly smaller than the radial hole 11 of the wheel disc 1, allowing it to be inserted into the radial hole 11. The spring 4 and the lock head 5 are sequentially placed in the radial hole 11 of the wheel disc 1. The length of the spring 4 and the height of the lock head 5 are appropriately set. When the spring 4 is uncompressed, the top of the lock head 5 is higher than the axial hole 11 of the wheel disc 1. After compression, the top of the lock head 5 is lower than the bottom of the axial hole 11 of the wheel disc 1.

[0061] Optionally, a small concave point is provided at the top center of the lock head 5 , and a hard, slender bar can be placed at the small concave point to press the lock head 5 .

[0062] Specifically, a slot is provided on the retaining ring lock block of the retaining ring 3, and the slot is used to pass the elongated strip of the pressing lock head 5. The width of the slot is greater than the width of the elongated strip of the pressing lock head 5.

[0063] The installation method of the above locking structure is as follows: After all blades 2 are installed on the wheel disc, use a thin strip to press the lock head 5 so that the top of the lock head 5 is lower than the bottom of the axial hole 11 of the wheel disc 1, and insert the retaining ring 3 into the axial hole 11 of the wheel disc 1. At this time, the slot on the retaining ring lock block is aligned with the lock head 5. Release the thin strip pressing the lock head 5, and the spring 4 will push the lock head 5 up, and the top of the lock head 5 will be inserted into the slot of the retaining ring lock block. Figure 7 shown.

[0064] Example 3

[0065] This embodiment also proposes an axial locking structure for compressor blades. The technical solution of this locking structure differs from that of embodiment 1 in the following aspects:

[0066] See Figure 8 As shown, the outer edge of the wheel disc 1 is further provided with a circumferential hole 13, which is perpendicular to the radial holes 11 and the circumferential hole 13. In addition, the radial hole 11 is a long hole provided along the circumferential direction.

[0067] See Figure 9 As shown, the lock head 5 is convex in shape, with a lock head hole 52 defined on one side of its lower half. The lower half is slightly smaller than the circumferential hole 13 of the wheel disc 1 to ensure that the lock head 5 can be inserted sideways into the circumferential hole 13. The spring 4 and lock head 5 are sequentially inserted into the circumferential hole 13 of the wheel disc 1, with the side defining the lock head hole 52 facing the outer edge of the wheel disc. When the spring 4 is uncompressed, the top of the lock head 5 is higher than the axial hole 11 of the wheel disc. After compression, the top of the lock head 5 is lower than the axial hole 11 of the wheel disc.

[0068] See Figure 10As shown, a lock block hole 33 is opened circumferentially on the retaining ring lock block. The width of the lock block hole 33 is larger than the width of the convex portion of the lock head 5 and smaller than the width of the lock body of the lower half of the lock head 5. The convex portion of the lock head 5 can be inserted into the lock block hole 33, and the lock head 5 and the retaining ring lock block can engage with each other.

[0069] The installation method of the above-mentioned locking structure is as follows: after all the blades 2 are installed on the wheel disc 1, the spring 4 and the lock head 5 are placed in the circumferential hole 13 of the wheel disc 1; the slender strip is inserted through the radial hole 11 of the wheel disc 1, and the slender strip is inserted into the lock head hole 52 of the lock head 5, and the lock head 5 is moved circumferentially by the slender strip, and the spring 4 is compressed so that the top of the convex part of the lock head 5 is lower than the axial hole 11 of the wheel disc 1; the retaining ring lock block 31 is inserted into the axial hole 11 of the wheel disc 1, and the lock block hole 33 of the retaining ring lock block 31 is aligned with the convex part of the lock head 5; the slender strip is loosened, and the spring 4 pushes the lock head 5 out, and the convex part of the lock head 5 is inserted into the lock block hole of the retaining ring lock block 31. For the installation status, refer to Figure 11 shown.

[0070] Example 4

[0071] This embodiment also proposes an axial locking structure for compressor blades. The technical solution of this locking structure differs from that of embodiment 1 in the following aspects:

[0072] See Figure 12 As shown, the retaining ring 3 is not provided with a retaining ring locking block, and a retaining ring hole 33 is provided on the retaining ring 3 that penetrates in the radial direction, and a straight hole 35 is provided on one side of the retaining ring hole 33 to the edge of the retaining ring. The number of retaining ring holes 33 is the same as that of the retaining ring locking block. Figure 13 As shown, the wheel disc 1 does not have an axial hole 11, and an axial groove is provided on the wheel disc 1 and the blade root along the circumferential direction. The axial groove is connected to the middle of the radial hole 11 of the wheel disc 1, and the retaining ring 3 can be inserted into the wheel disc 1 and the blade root of the blade 2 from the axial groove.

[0073] The arrangement of the lock head 5 and the spring 4 in this embodiment is the same as that in embodiment 2. The length of the spring 4 is appropriate. When not compressed, the top of the lock head 5 is higher than the axial groove of the wheel disc 1. After compression, the top of the lock head 5 is aligned with the bottom of the axial groove of the wheel disc 1.

[0074] Optionally, the retaining ring hole 33 is located in the middle of the retaining ring 3, and the size of the retaining ring hole 33 is slightly larger than the top of the lock head 5, so that the top of the lock head 5 can pass through the retaining ring hole 33, and the top of the lock head 5 can engage with each other.

[0075] Optionally, the axial width of the retaining ring 3 should be less than 1 / 10 of the axial width of the wheel disc 1 to prevent the axial grooves on the wheel disc 1 and the blade roots of the blades 2 from being too deep, thereby affecting the stress of the wheel disc 1 and the blade roots of the blades 2.

[0076] The installation method of the above locking structure is as follows: After all blades 2 are installed on the wheel disc 1, the spring 4 and the lock head 5 are placed in the radial hole 11 of the wheel disc 1; use a slender strip to press the lock head 5, the spring 4 is compressed so that the top of the lock head 5 is lower than the bottom of the axial hole 11 of the wheel disc 1, and the retaining ring 3 is inserted into the axial groove of the wheel disc 1. At this time, the retaining ring hole 33 on the retaining ring is aligned with the lock head 5. Release the slender strip pressing the lock head 5, the spring 4 pushes the lock head 5 up, and the top of the lock head 5 is inserted into the retaining ring hole 33 of the retaining ring. Figure 14 shown.

[0077] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0078] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0079] It should be noted that, in the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

Claims

1. A compressor blade axial locking structure, characterized by: It includes a wheel disc, blades, a retaining ring and a locking part between the wheel disc and the retaining ring. The blades are installed on the outer edge of the wheel disc, and the retaining ring is installed on the axial air outlet side of the wheel disc. The retaining ring is used to limit the axial movement of the blades. The locking part is used to detachably connect the retaining ring and the wheel disc. A hole and a groove that match the locking part are opened on the side of the outer edge of the wheel disc close to the retaining ring.

2. The compressor blade axial locking structure according to claim 1, characterized in that: The locking part includes a first locking portion and a second locking portion, the first locking portion is arranged on the retaining ring, and the second locking portion is arranged on the wheel disc, and the first locking portion and the second locking portion are detachably connected.

3. The compressor blade axial locking structure according to claim 2, characterized in that: The first locking portion includes a retaining ring locking block provided on one side of the retaining ring, and the second locking portion includes an elastic component and a locking head.

4. The compressor blade axial locking structure according to claim 3, characterized in that: A locking groove is provided on one side of the retaining ring lock block close to the axis, and a locking hole is provided on the locking head.

5. The compressor blade axial locking structure according to claim 3, characterized in that: A locking groove is provided on one side of the retaining ring lock block close to the axis, and the locking head is convex.

6. The compressor blade axial locking structure according to claim 3, characterized in that: The retaining ring locking block is provided with a through locking block hole along the circumferential direction, and the locking head is convex.

7. The compressor blade axial locking structure according to any one of claims 5 or 6, characterized in that: The retaining ring locking block is provided with a straight groove which penetrates along the axial direction.

8. The compressor blade axial locking structure according to any one of claims 2 to 6, characterized in that: The outer edge of the wheel disc is provided with mutually perpendicular holes on one side close to the retaining ring. The mutually perpendicular holes are used to insert the first locking part and the second locking part respectively. The first locking part and the second locking part are clamped to each other in the mutually perpendicular holes.

9. The compressor blade axial locking structure according to claim 8, characterized in that: The mutually perpendicular holes include radial holes and axial holes.

10. The compressor blade axial locking structure according to claim 9, characterized in that: The mutually perpendicular holes also include circumferential holes.

11. The compressor blade axial locking structure according to claim 2, characterized in that: The first locking portion includes a retaining ring hole radially extending through the retaining ring, and the second locking portion includes a spring and a locking head.

12. The compressor blade axial locking structure according to claim 11, characterized in that: A straight hole is provided from one side of the retaining ring hole to the edge of the retaining ring, and the shape of the lock head is convex.

13. The compressor blade axial locking structure according to claim 12, characterized in that: A radial hole is provided on the outer edge of the wheel disc near the side of the retaining ring, a circumferential groove is provided on the wheel disc and the blade heel, the spring and the lock head are arranged in the radial hole, and the retaining ring is inserted into the circumferential groove.

14. The compressor blade axial locking structure according to claim 11, characterized in that: The axial width of the retaining ring is less than one tenth of the axial width of the wheel disc.

15. The compressor blade axial locking structure according to claim 2, characterized in that: The retaining ring includes a segmented retaining ring and a full-ring retaining ring. The segmented retaining ring includes at least two segments, and the full-ring retaining ring is annular.

16. The compressor blade axial locking structure according to claim 15, characterized in that: The number of the first locking parts on the segmented retaining ring is at least one, and the number of the first locking parts on the full-ring retaining ring is at least two.

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