Shrinking tool for machining annular collecting chamber

Abstract

The utility model relates to a hole shrinkage tool for machining an annular collecting chamber, and belongs to the field of gas turbine machining tools. The technical problems that time and labor are consumed and the overall performance and the service life of the annular flow collecting chamber are easily affected in an existing treatment mode that holes exceeding the flow standard in the annular flow collecting chamber are reprocessed or blocked through filling materials are solved. The hole shrinkage tool for machining the annular collecting chamber comprises a positioning pin, a punching body, a compression spring and a set screw, the outline of the punching body is in a nail shape, the punching body comprises a hollow cavity penetrating through the punching body in the longitudinal direction and further comprises a punching opening formed in the front end of the punching body, the positioning pin is installed in the hollow cavity in a sliding mode in the longitudinal direction of the punching body, and the lower portion of the positioning pin extends out of the punching opening. One end of the compression spring is connected with the top face of the positioning pin, the other end of the compression spring is connected with the bottom face of the set screw, and the set screw is in threaded connection with the inner wall of the hollow cavity. And the hole shrinkage degree of the small hole is controlled by knocking the punching body. The machining device is used for machining the annular collecting chamber.

Description

Technical Field

[0001] The utility model relates to a shrinkage tool for machining an annular collecting chamber, belonging to the field of gas turbine machining tools. Background Art

[0002] In the existing gas turbine design, the task of the annular collecting chamber is to ensure that the bearing lubricating oil is sprayed evenly and accurately to the designated location. The Φ1.5 small holes on the annular collecting chamber are usually formed by CNC machine tools, a process that requires extremely high precision because the size of the small holes directly affects the injection flow of the lubricating oil. Ideally, these small holes should strictly comply with the design specifications to ensure that the lubricating oil can be evenly and accurately distributed to the bearing surface.

[0003] However, in the actual production process, due to the limitations of mechanical processing, including the accuracy of the machine tool, tool wear, the technical level of the operator and other factors, the size of the small hole often has a certain error. These errors may be small, but they may have a significant impact on the flow and distribution of the lubricating oil. If the small hole is too large, it may cause excessive flow of lubricating oil, increasing the consumption of lubricating oil. It may also cause additional resistance in the bearing due to excessive oil, affecting the efficiency of the gas turbine. On the contrary, if the small hole is too small, the flow of lubricating oil may not be enough to meet the lubrication needs of the bearing, causing premature wear or even damage to the bearing. At present, for holes that exceed the flow standard, reprocessing or plugging with filling materials are usually adopted. These methods are not only time-consuming and labor-intensive, but may also affect the overall performance and service life of the annular collecting chamber.

[0004] In summary, the existing treatment method of reprocessing or plugging the holes on the annular collecting chamber that exceed the flow standard with filling materials is time-consuming and labor-intensive and easily affects the overall performance and service life of the annular collecting chamber. Summary of the invention

[0005] The purpose of the utility model is to solve the technical problems that the existing treatment method of reprocessing or sealing the holes that exceed the flow standard on the annular collecting chamber is time-consuming and labor-intensive and easily affects the overall performance and service life of the annular collecting chamber, and thus provides a shrinking tool for processing annular collecting chambers.

[0006] The technical solution of the utility model is a shrinkage tool for processing an annular collecting chamber, comprising a locating pin, a punch body, a compression spring and a set screw, the contour shape of the punch body is a nail shape, the punch body comprises a hollow cavity penetrating along the longitudinal direction of the punch body, the punch body also comprises a punching notch arranged at the front end of the punch body, the locating pin is slidably installed in the hollow cavity along the longitudinal direction of the punch body, the lower part of the locating pin extends out of the punching notch, one end of the compression spring is connected to the top surface of the locating pin, the other end of the compression spring is connected to the bottom surface of the set screw, and the set screw is threadedly connected to the inner wall of the hollow cavity.

[0007] As another improvement of the present invention, the positioning pin includes a pin body and a pin head fixed at the lower part of the pin body. The pin head is shaped like a truncated cone. The lower bottom surface size of the truncated cone-shaped pin head is smaller than the upper bottom surface size of the pin head. The external hole contacts the side of the pin head to clamp the pin head.

[0008] As another improvement of the present invention, the angle between the generatrix of the truncated cone-shaped pin head and the vertical direction ranges from 9 degrees to 11 degrees.

[0009] As another improvement of the present invention, the diameter of the external hole is 1.5 mm, and the diameter of the upper bottom surface of the truncated cone-shaped pin head ranges from 1.6 mm to 1.8 mm.

[0010] As another improvement of the utility model, the punching opening at the front end of the punch body is in the shape of a truncated cone, and the upper bottom surface size of the truncated cone-shaped punching opening is smaller than the lower bottom surface size of the punching opening.

[0011] As another improvement of the present invention, the angle between the generatrix of the truncated cone punch and the vertical direction is in the range of 9 degrees to 11 degrees.

[0012] As another improvement of the present invention, the set screw is a slotted flat head set screw.

[0013] Beneficial effects of the utility model:

[0014] 1. The utility model adopts a nail-shaped punch body, and the punching opening at the tip of the punch body is accurately positioned by a positioning pin. The punch body is struck, and the punch body squeezes the material around the small hole on the annular collecting chamber, thereby achieving the purpose of reducing the diameter of the small hole on the annular collecting chamber.

[0015] 2. The utility model strikes the punch body, and the punch body squeezes the material around the small hole on the annular collecting chamber, thereby reducing the diameter of the small hole on the annular collecting chamber, making it closer to the design specification, thereby ensuring that the lubricating oil can be sprayed onto the bearing at the expected flow rate and pressure. This solves the problem of excessive lubricating oil flow caused by machining accuracy limitations in the prior art, thereby improving the overall performance of the gas turbine.

[0016] 3. When using the utility model, operators can easily get started and complete a large number of Φ1.5 small hole correction and shrinkage work in a short time, significantly improving production efficiency. In addition, since the use of this tool reduces the dependence on high-precision machine tools, it also greatly saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the overall structure of a shrinkage tool for machining an annular collecting chamber.

[0018] Figure 2 It is a schematic diagram of the structure of the punch body.

[0019] Figure 3 It is a schematic diagram of the structure of the positioning pin. DETAILED DESCRIPTION

[0020] Specific implementation method 1: Combination Figures 1 to 3 The present embodiment is described. The present embodiment is a shrinking tool for processing an annular collecting chamber, which includes a positioning pin 1, a punch 2, a compression spring 3 and a set screw 4. The outline of the punch 2 is a nail shape, one end of the punch 2 is flat, and the other end of the punch 2 is conical. The punch 2 includes a hollow cavity that passes through the punch 2 in the longitudinal direction. The punch 2 also includes a punch 5 arranged at the front end of the punch 2. The positioning pin 1 is slidably installed in the hollow cavity along the longitudinal direction of the punch 2. The lower part of the positioning pin 1 extends out of the punch 5. One end of the compression spring 3 is connected to the top surface of the positioning pin 1, and the other end of the compression spring 3 is connected to the bottom surface of the set screw 4. The set screw 4 is threadedly connected to the inner wall of the upper part of the hollow cavity. The positioning pin 1 guides the punch to accurately align with the small hole that needs to be corrected, and the set screw 4 is rotated to compress the compression spring 3. The positioning pin 1 is stuck on the small hole, and the punch 5 is in close contact with the material around the small hole. The punch 2 is struck, and the punch 2 squeezes the material around the small hole, thereby achieving the purpose of reducing the diameter of the small hole. The positioning pin ensures that the punch can be correctly aligned with the target position, so as to perform accurate shrinking operation; when the punch is knocked against the small hole, the punch mouth will squeeze the material inward, so as to achieve the purpose of reducing the diameter of the small hole. The material of the punch requires high hardness and durability to withstand the high pressure generated during the extrusion process; the compression spring provides the necessary pressure to ensure that the positioning pin can accurately guide the punch, while preventing the punch from generating excessive force when squeezing the small hole outward and damaging the edge of the small hole.

[0021] The operation process of this embodiment becomes very convenient. Users do not need to go through cumbersome procedures or spend a lot of time to master the use of the tool, which significantly reduces processing time and provides great flexibility for those occasions that require quick repairs or adjustments. This embodiment is highly adaptable. When working, by simply replacing positioning pins of different sizes and adjusting the size of the punching mouth of the punch body, it can be applied to various small hole sizes to perform shrinkage work. This means that whether in production or maintenance, as long as the size of the small hole changes, the tool can be quickly adjusted to adapt to different needs, greatly improving the practicality of the tool and ensuring good tooling versatility.

[0022] This embodiment is used to correct and improve the size of the small holes in the annular collecting chamber to make it closer to the design specifications, thereby ensuring that the lubricating oil can be sprayed onto the bearing at the expected flow rate and pressure. This is to solve the problem of excessive lubricating oil flow caused by machining precision limitations in the prior art, thereby improving the overall performance of the gas turbine. This embodiment can not only ensure the performance of the annular collecting chamber of the gas turbine, but also help to improve maintenance efficiency and reduce operation and maintenance costs. The design of the tool takes into account the convenience of user operation and reduces dependence on complex equipment or high-precision machine tools, so that high-quality maintenance work can be completed even without the support of advanced equipment. Therefore, this invention has significant economic value and practical significance for gas turbine manufacturers and the maintenance industry.

[0023] Specific implementation method 2: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the first embodiment is that the positioning pin 1 includes a pin body 6 and a pin head 7 fixed to the lower part of the pin body 6. The pin head 7 is in the shape of a truncated cone. The lower bottom surface size of the truncated cone-shaped pin head 7 is smaller than the upper bottom surface size of the pin head 7. The external hole contacts the side of the pin head 7 to clamp the pin head 7. The external hole is the small hole on the annular collecting chamber. The other components and connection methods are the same as those of the first embodiment.

[0024] Specific implementation method three: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the first embodiment is that the angle between the generatrix of the truncated cone-shaped pin head 7 and the vertical direction is in the range of 9 to 11 degrees. The other components and connection methods are the same as those of the first or second embodiment.

[0025] Specific implementation method four: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the first embodiment is that the diameter of the external hole is 1.5 mm, and the diameter of the upper bottom surface of the truncated cone-shaped pin head 7 ranges from 1.6 mm to 1.8 mm. The external hole is the small hole on the annular collecting chamber. The other components and connection methods are the same as any one of the first to third embodiments.

[0026] Specific implementation method five: Combination Figures 1 to 3 This embodiment is described, and the difference between this embodiment and the specific embodiment 1 is that the shape of the punching opening 5 at the front end of the punch body 2 is truncated cone, and the upper bottom surface size of the truncated cone-shaped punching opening 5 is smaller than the lower bottom surface size of the punching opening 5. Other components and connection methods are the same as any one of the specific embodiments 1 to 4.

[0027] Specific implementation method six: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the first embodiment is that the angle between the generatrix of the truncated cone-shaped punching hole 5 and the vertical direction is in the range of 9 to 11 degrees. The other components and connection methods are the same as any one of the first to fifth embodiments.

[0028] Specific implementation method seven: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the first embodiment is that the set screw 4 is a slotted flat head set screw 4. The slotted flat head set screw is the fixed part of the tool, which is used to compress the compression spring to ensure the stability of the entire tool during operation. The slotted flat head set screw design allows the user to adjust the pressure of the compression spring as needed to adapt to different working conditions and material properties. The other components and connection methods are the same as any one of the first to sixth embodiments.

[0029] Combination Figures 1 to 3 Explain the working principle of the utility model:

[0030] First, the positioning pin needs to be inserted into the target small hole to ensure that the entire tool can accurately align with the small hole, laying the foundation for the subsequent shrinking work. Then, the operator needs to tighten the compression spring by turning the set screw. Push the punch at the top of the punch body to make close contact with the material around the small hole. This design allows the punch body to maintain constant pressure during the hammering process to ensure that the material around the small hole is evenly squeezed. Next, the operator needs to manually use a hammer to hammer the punch body in the direction of the small hole. This action causes the groove of the punch body to accurately and slightly squeeze the material around the small hole, thereby achieving the shrinking effect. By adjusting the force and number of hammering, the operator can accurately control the shrinkage degree of the small hole according to actual needs during the flow test.

[0031] 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 shrinkage tool for machining an annular collecting chamber, characterized in that The invention comprises a positioning pin (1), a punch body (2), a compression spring (3) and a set screw (4); the outline shape of the punch body (2) is a nail shape; the punch body (2) comprises a hollow cavity which passes through the punch body (2) in the longitudinal direction; the punch body (2) further comprises a punching notch (5) arranged at the front end of the punch body (2); the positioning pin (1) is slidably installed in the hollow cavity in the longitudinal direction of the punch body (2); the lower part of the positioning pin (1) extends out of the punching notch (5); one end of the compression spring (3) is connected to the top surface of the positioning pin (1); the other end of the compression spring (3) is connected to the bottom surface of the set screw (4); and the set screw (4) is threadedly connected to the inner wall of the upper part of the hollow cavity.

2. A shrinkage tool for machining an annular collecting chamber according to claim 1, characterized in that: The positioning pin (1) comprises a pin body (6) and a pin head (7) fixed at the lower part of the pin body (6); the pin head (7) is in the shape of a truncated cone; the size of the lower bottom surface of the truncated cone-shaped pin head (7) is smaller than the size of the upper bottom surface of the pin head (7); and the external hole contacts the side surface of the pin head (7) so as to clamp the pin head (7).

3. A shrinkage tool for machining annular collecting chamber according to claim 2, characterized in that: The included angle between the generatrix of the truncated cone-shaped pin head (7) and the vertical direction is in the range of 9 degrees to 11 degrees.

4. A shrinkage tool for machining annular collecting chamber according to claim 2, characterized in that: The diameter of the external hole is 1.5 mm, and the diameter of the upper bottom surface of the truncated cone-shaped pin head (7) ranges from 1.6 mm to 1.8 mm.

5. The shrinkage tool for machining annular collecting chamber according to claim 1, characterized in that: The punching opening (5) at the front end of the punch body (2) is in the shape of a truncated cone, and the upper bottom surface size of the truncated cone-shaped punching opening (5) is smaller than the lower bottom surface size of the punching opening (5).

6. A shrinkage tool for machining annular collecting chamber according to claim 5, characterized in that: The included angle between the generatrix of the truncated cone-shaped punching notch (5) and the vertical direction is in the range of 9 degrees to 11 degrees.

7. A shrinkage tool for machining annular collecting chamber according to claim 1, characterized in that: The set screw (4) is a slotted flat head set screw (4).

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