Novel nut structure

Abstract

The utility model belongs to the technical field of fasteners, and particularly discloses a novel nut structure which comprises a nut body, a chambering port and an anti-rotation hook head, the nut body is communicated with the chambering port, internal threads are arranged on the inner side of the nut body, the chambering port is fixedly connected to one end of the nut body, and the anti-rotation hook head is fixedly connected with the chambering port. The anti-rotation hook head is fixedly connected to the outer side of the nut body and extends towards one end of the reaming port, circumferential limiting of the nut body and rotation limiting of the nut body can be achieved, the reaming port can be used for reaming after assembly to achieve interference fit, axial movement is limited, single-side fixing is achieved, and after double-side fixing is matched, the anti-rotation hook head can be used for fixing the nut body. When the gas turbine is assembled or repaired, the gas turbine can be disassembled from the other side, so that space limitation on the side where the chambering port is located is avoided, and disassembly, assembly and maintenance are not affected, the assembly space is effectively limited, the number of disassembled parts in the assembly or maintenance process is reduced, time is saved, assemblability and maintainability are guaranteed, and the maintenance cost of the gas turbine is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and in particular relates to a novel nut structure. Background Art

[0002] Gas turbine hot-end components are subject to high temperatures, high-speed friction, and high-velocity airflow. Long-term use can easily lead to damage to blades and other components, necessitating component replacement and rebalancing of rotating parts. Gas turbines typically use fasteners, such as bolts and nuts, to connect components and ensure complete assembly. Currently, most domestic installations use standard fasteners. However, for products with limited space, lack of maneuvering space, or requiring frequent bolt removal, conventional fasteners are inefficient and no longer meet operational requirements. Utility Model Content

[0003] In view of the problem that gas turbines in the prior art need a fastener that can improve the efficiency of assembly and disassembly, a new nut structure is proposed. This utility model provides the following technical solutions:

[0004] A new type of nut structure includes a nut body, a reaming port and an anti-rotation hook head. The nut body and the reaming port are connected to each other. An internal thread is provided on the inner side of the nut body. The reaming port is fixedly connected to one end of the nut body. The anti-rotation hook head is fixedly connected to the outer side of the nut body and extends toward one end of the reaming port.

[0005] Preferably, the reaming port is coaxially arranged with the nut body.

[0006] Preferably, the reaming port is integrally formed with the nut body.

[0007] Preferably, a positioning protrusion is fixedly connected to the outer side of the nut body, and the positioning protrusion is arranged at one end of the nut body close to the reaming port.

[0008] Preferably, the positioning protrusion is integrally formed with the nut body.

[0009] Preferably, the positioning protrusion is arranged in a ring shape.

[0010] Preferably, the outer side surface of the positioning protrusion is bent in a hexagonal shape.

[0011] Preferably, the anti-rotation hook head is fixedly connected to the positioning protrusion.

[0012] Preferably, the anti-rotation hook head includes a bent portion and a straight portion, both ends of the bent portion are respectively connected to the positioning protrusion and the straight portion, and the expansion port is axially protruded from the straight portion.

[0013] Preferably, the extending direction of the straight portion is parallel to the axial direction of the nut body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The unique design of anti-rotation hook and positioning convex structure reduces the number of parts to be disassembled during assembly or maintenance, saving time;

[0016] 2. The integral molding of the expansion port and the nut body, as well as the secure connection of the anti-rotation hook, enhance the overall structural strength of the nut and the stability during assembly;

[0017] 3. By reducing the complexity and time of assembly and maintenance, the overall maintenance cost of the gas turbine is indirectly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structural diagram of the present utility model;

[0019] Figure 2 It is a rear view structural diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the use state of the utility model;

[0021] In the accompanying drawings, 1. nut body; 2. internal thread; 3. reaming port; 4. anti-rotation hook; 41. bending portion; 42. straight portion; 5. positioning protrusion; 6. part A; 7. fastening nut B; 8. part C; 9. flaring section D; 10. part D; 11. part E. DETAILED DESCRIPTION

[0022] The directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only used with reference to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the invention of the utility model.

[0023] Example 1

[0024] like Figure 1-3As shown, a new type of nut structure includes a nut body 1, a reaming port 3 and an anti-rotation hook head 4, the nut body 1 and the reaming port 3 are connected to each other, and an internal thread 2 is provided on the inner side of the nut body 1, the reaming port 3 is fixedly connected to one end of the nut body 1, and the anti-rotation hook head 4 is fixedly connected to the outer side of the nut body 1 and extends to one end of the reaming port 3, which can realize circumferential limitation of the nut body 1 and restrict its rotation, and the reaming port 3 can be used for reaming after assembly to achieve interference fit, thereby limiting axial movement, thereby achieving unilateral fixation, and after bilateral fixation, it can be disassembled from the other side, thereby avoiding space limitation on the side where the reaming port 3 is located, affecting disassembly and maintenance. Therefore, the utility model effectively limits the assembly space, reduces the number of parts disassembled during assembly or maintenance, saves time and ensures assemblability and maintainability, thereby reducing the maintenance cost of the gas engine.

[0025] Specifically, the reaming port 3 is coaxially arranged with the nut body 1 , and the reaming port 3 and the nut body 1 are integrally formed, which can improve the overall structural strength.

[0026] Specifically, a positioning protrusion 5 is fixedly connected to the outside of the nut body 1. The positioning protrusion 5 is arranged at one end of the nut body 1 close to the expansion port 3, providing a stable connection basis for the anti-rotation hook head 4, and also helping to improve the positioning accuracy of the nut during the assembly process.

[0027] Specifically, the positioning protrusion 5 is integrally formed with the nut body 1 , and the positioning protrusion 5 is annular. The anti-rotation hook 4 is fixedly connected to the positioning protrusion 5 , which not only simplifies the manufacturing process but also improves the overall structural strength of the nut.

[0028] Specifically, the anti-rotation hook head 4 includes a bent portion 41 and a straight portion 42, the two ends of the bent portion 41 are respectively connected to the positioning protrusion 5 and the straight portion 42, and the reaming port 3 is axially protruding from the straight portion 42; the extension direction of the straight portion 42 is parallel to the axial direction of the nut body 1, so that the anti-rotation hook head 4 can effectively prevent the nut from loosening during rotation, thereby improving the stability and reliability of assembly.

[0029] like Figure 3As shown, after the rotor assembly is assembled, the imbalance of the rotor assembly needs to be adjusted by replacing part C8. During the assembly process, due to the structural limitations of parts A6 and C8, the fastening nut B7 cannot be directly tightened with a wrench. The utility model is installed and replaced at the fastening nut B7, and the axial limit is achieved by forming a flared section D9 through the reaming port 3, and the limit in the circumferential direction is achieved by the anti-rotation hook head 4. Only parts D10 and E11 need to be disassembled, which greatly reduces the number of parts disassembled during assembly or maintenance, saves time, and ensures assemblability and maintainability, thereby reducing the maintenance cost of the gas turbine; improving assembly efficiency, reducing the failure rate caused by loose nuts, and further extending the service life of the equipment.

[0030] Example 2

[0031] The difference from Example 1 is that the outer side surface of the positioning protrusion 5 is bent in a hexagonal shape, which can correspond to the hexagonal nut and is easy to cooperate with the wrench, further improving the assembly efficiency and maintenance convenience.

Claims

1. A new type of nut structure, characterized in that: The invention comprises a nut body (1), a reaming port (3) and an anti-rotation hook head (4); the nut body (1) and the reaming port (3) are communicated with each other; an internal thread (2) is provided on the inner side of the nut body (1); the reaming port (3) is fixedly connected to one end of the nut body (1); and the anti-rotation hook head (4) is fixedly connected to the outer side of the nut body (1) and extends toward one end of the reaming port (3).

2. The novel nut structure according to claim 1 is characterized in that: The reaming port (3) is coaxially arranged with the nut body (1).

3. The novel nut structure according to claim 2, characterized in that: The reaming port (3) and the nut body (1) are integrally formed.

4. The novel nut structure according to claim 1, characterized in that: A positioning protrusion (5) is fixedly connected to the outside of the nut body (1), and the positioning protrusion (5) is arranged at one end of the nut body (1) close to the reaming port (3).

5. The novel nut structure according to claim 4 is characterized in that: The positioning protrusion (5) and the nut body (1) are integrally formed.

6. The novel nut structure according to claim 4, characterized in that: The positioning protrusion (5) is arranged in a ring shape.

7. The novel nut structure according to claim 4, characterized in that: The outer side surface of the positioning protrusion (5) is bent in a hexagonal shape.

8. The novel nut structure according to claim 4, characterized in that: The anti-rotation hook head (4) is fixedly connected to the positioning protrusion (5).

9. The novel nut structure according to claim 4, characterized in that: The anti-rotation hook head (4) comprises a bent portion (41) and a straight portion (42), the two ends of the bent portion (41) are respectively connected to the positioning protrusion (5) and the straight portion (42), and the reaming port (3) is arranged to protrude axially from the straight portion (42).

10. The novel nut structure according to claim 9, characterized in that: The extending direction of the straight portion (42) is parallel to the axial direction of the nut body (1).

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