Reaming tool for power turbine case of gas turbine

Abstract

The utility model discloses a reaming tool for a power turbine case of a gas turbine, which comprises a supporting rod, a bearing rod and a top rod, the supporting rod is cylindrical, the surface of one end part of the supporting rod is smooth, the other end part of the supporting rod is provided with one end of the bearing rod through a deep groove ball bearing, and the top rod is provided with a top hole. The other end of the bearing rod is rotationally connected with one end of the ejector rod, and the other end of the ejector rod is connected with the reamer; according to the utility model, the power turbine case is fixed on the supporting platform, the reaming tool is placed between the power turbine case and the supporting platform, and the supporting rod of the reaming tool is placed on the supporting platform, so that the reamer of the reaming tool is positioned at the to-be-cut part of the power turbine case; therefore, under the condition that the supporting platform provides counter-acting force for the reaming tool, the bearing rod and the top rod are separated by rotating the bearing rod or the top rod, and the reamer is driven by the top rod to conduct reaming cutting work on the power turbine case.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbines, in particular to a reaming tool for a power turbine casing of a gas turbine. Background Art

[0002] A gas turbine is an internal combustion engine that burns fuel to produce high-temperature, high-pressure gases, which are then used to rotate a power turbine to generate mechanical energy. This mechanical energy can be directly used to drive a generator to generate electricity for a variety of applications such as aircraft, ships, trains and industrial equipment.

[0003] The power turbine is one of the three core components of a gas turbine. The power turbine consists of a rotor part and a stator part. The stator part includes a power turbine support ring and a guide. The power turbine support ring is mainly used to support and fix the power turbine to ensure its stability and reliability when running at high speed. The guide is also called a nozzle, which guides the direction of the airflow, and the stator blades are also assembled on the guide. The stator part of the power turbine plays a vital role in ensuring the correct guidance of the airflow and withstanding extreme working environments. The end face pin hole on the power turbine support ring must be processed as a component to ensure the geometric tolerance with the bearing position, and the position tolerance is not greater than 0.03. The power turbine support ring is large in size and has a diameter of more than 2 meters. The end face pin hole is required to have a position tolerance of no more than 0.03 when the aperture is 2 meters. The precision requirement is high, and most gantry machine tools cannot meet the requirements. Therefore, the component power turbine support ring and the 4th to 6th stage guide are combined for processing. The component combination processing has a large volume, requires a large gantry machine tool, and has a high cost. Therefore, a gas turbine power turbine casing end face surface processing tool is used for manual reaming. Utility Model Content

[0004] In view of the above problems in the prior art, the utility model provides a reaming tool for a gas turbine power turbine casing, which solves the problem that the existing power turbine component assembly processing has a large volume, requires a large gantry machine tool, and is relatively costly.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] Provided is a reaming tool for a gas turbine power turbine casing, which comprises a support rod, a bearing rod and a push rod. The support rod is cylindrical, and the surface of one end of the support rod is flat, and the other end of the support rod is mounted with one end of the bearing rod through a deep groove ball bearing, the other end of the bearing rod is rotatably connected to one end of the push rod, and the other end of the push rod is connected to a reamer.

[0007] The utility model fixes a power turbine casing on a supporting platform, and simultaneously places a reaming tool between the power turbine casing and the supporting platform, and a supporting rod of the reaming tool is placed on the supporting platform, so that a reamer of the reaming tool is located at a position to be cut on the power turbine casing, so that when the supporting platform provides a reaction force for the reaming tool, the bearing rod or the push rod is rotated to separate the bearing rod and the push rod is driven by the push rod to perform reaming and cutting work on the power turbine casing.

[0008] Furthermore, a mounting groove is provided on the other end of the support rod, and one end of the bearing rod is interference-fitted in the mounting groove through a deep groove ball bearing.

[0009] Furthermore, a first clamping portion is provided at the other end of the bearing rod, and a second clamping portion is provided at one end of the push rod, and the first clamping portion is rotatably connected to the second clamping portion.

[0010] Furthermore, a threaded hole is provided on the first clamping part, and a stud is provided on the second clamping part. The stud is inserted into the threaded hole and connected to the threaded hole through threads.

[0011] Furthermore, a conical portion is provided at the end of the push rod connected to the reamer, and the tip of the conical portion is connected to the bottom of the reamer.

[0012] Furthermore, the end of the push rod connected to the reamer is provided with a limiting hole that fits with the bottom of the reamer, and the bottom of the reamer is embedded in the limiting hole.

[0013] The utility model discloses a reaming tool for a gas turbine power turbine casing, which has the following beneficial effects:

[0014] The utility model fixes a power turbine casing on a supporting platform, and simultaneously places a reaming tool between the power turbine casing and the supporting platform, and a supporting rod of the reaming tool is placed on the supporting platform, so that a reamer of the reaming tool is located at a position to be cut on the power turbine casing, so that when the supporting platform provides a reaction force for the reaming tool, the bearing rod or the push rod is rotated to separate the bearing rod and the push rod, and the reamer is driven by the push rod to perform reaming and cutting work on the power turbine casing, thereby eliminating the need for using a large gantry machine tool, greatly reducing costs, improving processing efficiency, reducing the turnover times of large components, and indirectly shortening assembly time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a reaming tool for a gas turbine power turbine casing.

[0016] Figure 2 The utility model is a schematic diagram of the internal structure of a reaming tool for a gas turbine power turbine casing.

[0017] Figure 3 It is a structural schematic diagram of another reaming tool of the utility model.

[0018] Figure 4 The utility model is a schematic diagram of the use of a reaming tool for a gas turbine power turbine casing.

[0019] Among them, 1. support rod; 11. mounting groove; 2. bearing rod; 21. first clamping part; 22. threaded hole; 3. push rod; 31. second clamping part; 32. stud; 33. tapered part; 34. limiting hole; 4. deep groove ball bearing; 5. reamer; 6. power turbine casing; 7. support platform. DETAILED DESCRIPTION

[0020] The specific implementation modes of the present invention are described to facilitate the understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all utility model creations utilizing the concept of the present invention are protected.

[0021] refer to Figure 1-Figure 4 , which is a structural schematic diagram of a reaming tool for a gas turbine power turbine casing in this embodiment, is intended to solve the problem that the existing power turbine component combination processing has a large volume, requires a large gantry machine tool, and has a high cost. The specific structure in this embodiment will be described in detail below.

[0022] A reaming tool for a gas turbine power turbine casing comprises a support rod 1, a bearing rod 2 and a top rod 3.

[0023] Specifically, the support rod 1 is cylindrical, and the surface of one end of the support rod 1 is flat. The other end of the support rod 1 is installed with one end of a bearing rod 2 through a deep groove ball bearing 4. The other end of the bearing rod 2 is rotatably connected to one end of a push rod 3, and the other end of the push rod 3 is connected to a reamer 5.

[0024] In this embodiment, the utility model fixes the power turbine casing 6 on the support platform 7, and at the same time places a reaming tool between the power turbine casing 6 and the support platform 7, and the support rod 1 of the reaming tool is placed on the support platform, so that the reamer 5 of the reaming tool is located at the position to be cut on the power turbine casing 6, so that when the support platform 7 provides a reaction force for the reaming tool, the bearing rod 2 and the push rod 3 are separated by rotating the bearing rod 2 or the push rod 3, and the reamer 5 is driven by the push rod 3 to perform reaming and cutting work on the power turbine casing 6, thereby eliminating the need for a large gantry machine tool, greatly reducing costs, improving processing efficiency, reducing the turnover times of large components, and indirectly shortening assembly time.

[0025] Specifically, a mounting groove 11 is formed on the other end of the support rod 1 , and one end of the bearing rod 2 is interference-fitted into the mounting groove 11 through a deep groove ball bearing 4 .

[0026] In this embodiment, a mounting groove 11 is opened on the other end of the support rod 1, and the deep groove ball bearing 4 is interference mounted in the mounting groove 11. One end of the bearing rod 2 is interference mounted on the deep groove ball bearing 4, so that the support rod 1 fixes the bearing rod 2 while allowing the bearing rod 2 to rotate relative to the support rod 1.

[0027] Specifically, the other end of the bearing rod 2 is provided with a first clamping portion 21 , and one end of the push rod 3 is provided with a second clamping portion 31 , and the first clamping portion 21 is rotatably connected to the second clamping portion 31 .

[0028] In this embodiment, the first clamping portion 21 of the bearing rod 2 and the second clamping portion 31 of the push rod 3 are rotatably connected, so that the operator holds the first clamping portion 21 or the second clamping portion 31 to rotate the first clamping portion 21 relative to the second clamping portion 31, thereby making the bearing rod 2 and the push rod 3 approach each other or move away from each other. In this embodiment, the first clamping portion 21 and the second clamping portion 31 are both regular hexagons, so that the operator can hold them with a wrench.

[0029] Specifically, a threaded hole 22 is formed on the first clamping portion 21 , and a stud 32 is provided on the second clamping portion 31 . The stud 32 is inserted into the threaded hole 22 and connected to the threaded hole 22 by threads.

[0030] In this embodiment, the stud 32 on the second clamping part 31 is inserted into the threaded hole 22 on the first clamping part 21, so that the bearing rod 2 and the top rod 3 are rotatably connected. The operator holds the first clamping part 21 or the second clamping part 31 to make the bearing rod 2 and the top rod 3 approach or move away from each other through the cooperation of the stud 32 and the threaded hole 22.

[0031] Furthermore, this embodiment provides two connection modes for connecting the push rod 3 to the reamer 5:

[0032] The first connection mode is that a conical portion 33 is provided at the end of the push rod 3 connected to the reamer 5 , and the tip of the conical portion 33 is connected to the bottom of the reamer 5 .

[0033] In this embodiment, a conical portion 33 is provided at the end of the push rod 3 connected to the reamer 5, and the tip of the conical portion 33 is in contact with the bottom of the reamer 5, so that when the push rod 3 rotates and moves away from the bearing rod 2, when the push rod 3 is rotated by the second clamping portion 31, the threads move relatively, and when the reamer 5 is driven to move upward by the push rod 3, the reamer 5 is driven to rotate to perform reaming and cutting work on the power turbine casing 6, so that the cutting amount of the reamer 5 will not be too large during cutting, causing the reamer to get stuck. If the reamer gets stuck, the smoothness of the hole will be reduced and the reamer 5 will be damaged.

[0034] The second connection mode is that the end of the push rod 3 connected to the reamer 5 is provided with a limiting hole 34 which fits with the bottom of the reamer 5 , and the bottom of the reamer 5 is embedded in the limiting hole 34 .

[0035] In this embodiment, a limiting hole 34 is provided at the end portion where the push rod 3 is connected to the reamer 5. The limiting hole 34 is a rectangular hole that fits with the bottom of the reamer 5, so that the bottom of the reamer 5 is embedded in the limiting hole 34. When the push rod 3 is rotated by the second clamping portion 31, the threads move relatively, so that the push rod 3 drives the reamer 5 to rotate, and drives the reamer 5 to move upward to perform reaming and cutting work on the power turbine casing 6, so that the reamer 5 can cut quickly and efficiently.

[0036] The working principle of a reaming tool for a gas turbine power turbine casing in this scheme is:

[0037] In practical application, the utility model refers to Figure 1-Figure 4 First, fix the power turbine casing 6 on the supporting platform 7, and place the reaming tool between the power turbine casing 6 and the supporting platform 7.

[0038] Then, the bottom of the support rod 1 of the reaming tool is supported on the support platform 7, so that the reamer 5 of the reaming tool is located at the part to be cut on the power turbine casing 6, and the relative pin hole position of the reamer 5 is compared and fine-tuned to meet the requirements.

[0039] Finally, with the support platform 7 providing a reaction force for the reaming tool, when the push rod 3 is rotated by the second clamping portion 31, the threads move relatively, so that the push rod 3 drives the reamer 5 to rotate and move upward to perform reaming and cutting work on the power turbine casing 6, thereby eliminating the need for a large gantry machine tool, greatly reducing costs, improving processing efficiency, reducing the turnover times of large components, and indirectly shortening assembly time.

[0040] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A reaming tool for a gas turbine power turbine casing, characterized in that: It comprises a support rod (1), a bearing rod (2) and a top rod (3); The support rod (1) is cylindrical, and the surface of one end of the support rod (1) is flat; the other end of the support rod (1) is mounted with one end of the bearing rod (2) via a deep groove ball bearing (4); The other end of the bearing rod (2) is rotatably connected to one end of the push rod (3); the other end of the push rod (3) is connected to the reamer (5); A first clamping portion (21) is provided at the other end of the bearing rod (2), and a second clamping portion (31) is provided at one end of the push rod (3), and the first clamping portion (21) is rotatably connected to the second clamping portion (31); a threaded hole (22) is provided on the first clamping portion (21), and a stud (32) is provided on the second clamping portion (31), and the stud (32) is inserted into the threaded hole (22) and is connected to the threaded hole (22) by a thread.

2. The reaming tool for a gas turbine power turbine casing according to claim 1, characterized in that: The other end of the support rod (1) is provided with a mounting groove (11), and one end of the bearing rod (2) is interference-mounted in the mounting groove (11) via a deep groove ball bearing (4).

3. The reaming tool for a gas turbine power turbine casing according to claim 1, characterized in that: The end of the push rod (3) connected to the reamer (5) is provided with a tapered portion (33), and the tip of the tapered portion (33) is connected to the bottom of the reamer (5).

4. The reaming tool for a gas turbine power turbine casing according to claim 1, characterized in that: The end of the push rod (3) connected to the reamer (5) is provided with a limiting hole (34) that fits with the bottom of the reamer (5), and the bottom of the reamer (5) is embedded in the limiting hole (34).

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