Thickness grinding tool for sealing strip of gas turbine
By designing a front and rear pressure plate structure, combined with spring pressure and screw drive, the deformation problem during the grinding of gas turbine sealing strips was solved, achieving precise thickness control and high yield, and improving work efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI HAIYE ELECTROMECHANICAL EQUIP CO LTD
- Filing Date
- 2025-05-17
- Publication Date
- 2026-04-21
AI Technical Summary
In the existing technology, gas turbine sealing strips are prone to deformation during grinding due to improper clamping, and it is difficult to control the thickness tolerance, resulting in low yield and low work efficiency.
By employing a front and rear pressure plate structure, combined with spring pressure and lead screw drive, and through the micro-movement of the product guide groove and grinding wheel, the workpiece is ensured not to deform during the grinding process, thus achieving precise thickness control.
This improved the yield and efficiency of gas turbine sealing strips, prevented surface burning of workpieces, and ensured that the thickness was within tolerance.
Smart Images
Figure CN224144345U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of gas turbine sealing strip processing technology, and in particular to a tooling for grinding the thickness of gas turbine sealing strips. Background Technology
[0002] A gas turbine is an internal combustion power machine that uses a continuously flowing gas as a working fluid to drive an impeller to rotate at high speed, converting the energy of fuel into useful work. It is a type of rotating impeller thermal engine. The sealing strips of a gas turbine are made of stainless steel and nickel-based alloy materials.
[0003] When grinding stainless steel and nickel-based alloy materials, magnetic chucks cannot be used to hold the material for grinding. Side clamping is also not recommended for very thin materials, as it can easily deform the material and result in inconsistent grinding thickness after release. Currently, side clamping for grinding easily deforms the workpiece, causing it to exceed tolerance requirements after release. Furthermore, the clamping force is difficult to control. During grinding, the gas turbine sealing strip is prone to warping and deformation due to heat. The workpiece is also not easily able to fully conform to the tooling surface during clamping. Further improvements are needed.
[0004] To address the aforementioned issues, this application provides a tooling for grinding the thickness of gas turbine sealing strips. Utility Model Content
[0005] To address the shortcomings of existing technologies, this application provides a grinding fixture for gas turbine sealing strip thickness, which has the advantages of improving yield and work efficiency, thereby solving the problems mentioned in the background technology.
[0006] To achieve the aforementioned advantages of improved yield and work efficiency, the specific technical solution adopted in this application is as follows:
[0007] A tooling for grinding the thickness of a gas turbine sealing strip includes a fixed block connecting plate and a base. The base is fixedly installed on the top surface of the fixed block connecting plate, and a lead screw is threaded through one end of the fixed block connecting plate. A guide rail slider is threaded onto the surface of the lead screw. The top surface of the guide rail slider is fixedly connected to the connecting block. A product guide groove is opened on the top surface of the base, and a sealing strip product is slidably inserted into the inner side of the product guide groove. One end of the sealing strip product is fixedly connected to the other end of the connecting block through a connecting threaded pin.
[0008] A grinding wheel is provided above the base, and a front fixed plate and a rear fixed plate are fixedly installed on both sides of the grinding wheel on the top surface of the base, respectively. The front fixed plate and the rear fixed plate are rotatably connected to a front pressure plate and a rear pressure plate by a front rotating pin and a rear rotating pin, respectively. A front spring pressure plate and a rear spring pressure plate are fixedly installed on the outer side of the front pressure plate and the rear pressure plate on the top surface of the base, respectively. The front spring pressure plate and the rear spring pressure plate abut against the other end of the top surface of the front pressure plate and the rear pressure plate by a front pressure rod pin and a rear pressure rod pin, respectively.
[0009] Furthermore, the bottom surface of the other end of the front pressure plate and the rear pressure plate are provided with rounded corners, and the surfaces of the front pressure plate and the rear pressure plate are provided with assembly holes for the front rotating pin and the rear rotating pin to pass through. The surface of the rear pressure plate is provided with a vertical assembly hole for the connecting threaded pin to pass through.
[0010] By adopting the above technical solution, during grinding, the front and rear pressure plates press the workpiece downwards by spring pressure, which improves the stability of workpiece movement and grinding.
[0011] Furthermore, a handwheel handle is fixedly installed at the other end of the lead screw.
[0012] By adopting the above technical solution, turning the handwheel handle can drive the lead screw to rotate, thereby moving the workpiece. The workpiece can be moved left and right without stopping by manually turning the handwheel handle, which avoids the formation of a scorched surface on the workpiece and improves the yield and work efficiency.
[0013] Furthermore, the grinding wheel is used in conjunction with a drive mechanism and a lifting mechanism.
[0014] Furthermore, the top surface of the base is provided with front and rear fixing block mounting slots, and the front fixing plate and the rear fixing plate are respectively located in the front and rear fixing block mounting slots.
[0015] By adopting the above technical solution, a front fixed plate and a rear fixed plate are fixedly installed on the top surface of the base, and the front fixed plate and the rear fixed plate are rotatably connected to a front pressure plate and a rear pressure plate through a front rotating pin and a rear rotating pin, respectively. A front spring pressure plate and a rear spring pressure plate are fixedly installed on the outer side of the front pressure plate and the rear pressure plate on the top surface of the base, respectively. The front spring pressure plate and the rear spring pressure plate abut against the other end of the top surface of the front pressure plate and the rear pressure plate through a front pressure rod pin and a rear pressure rod pin, respectively. The two ends of the front pressure rod pin and the rear pressure rod pin can move up and down through springs. The surfaces of the front spring pressure plate 7 and the rear spring pressure plate 8 are provided with guide grooves for the front pressure rod pin and the rear pressure rod pin 10 to move up and down. The springs use their elasticity to press the front pressure rod pin and the rear pressure plate tightly against the front pressure plate and the rear pressure plate, thereby pressing the workpiece.
[0016] Furthermore, a fixing groove is provided on the top surface of the base.
[0017] Furthermore, the depth of the guide groove of the product is 0.1-0.2 mm less than the thickness of the workpiece.
[0018] By adopting the above technical solution, the depth of the product guide groove is 0.1-0.2mm less than the workpiece thickness. First, the grinding wheel is moved longitudinally away, and the workpiece passes through the front and rear pressure plates. Then, the workpiece is fixedly connected to the connecting plate by connecting threaded pins. Subsequently, the grinding wheel moves above the workpiece and begins to descend for grinding. Each descent distance does not exceed 0.02mm. Turning the handwheel crank can drive the lead screw to rotate, thus moving the workpiece. By slowly moving the grinding wheel downwards, the workpiece is ground to the designed thickness. This device avoids the problem of workpiece deformation caused by side clamping. The vertical micro-movement of the grinding wheel ensures the accuracy of the feed and guarantees that the workpiece thickness is within the tolerance range.
[0019] Furthermore, the bottom surface of the guide rail slider slides against the top surface of one end of the fixed block connecting plate.
[0020] In summary, compared with the prior art, this application provides a grinding fixture for the thickness of gas turbine sealing strips, which has the following beneficial effects:
[0021] 1. This application uses a front pressure plate and a rear pressure plate. When grinding gas turbine sealing strips, the workpiece can be placed inside the product guide groove. The depth of the product guide groove is 0.1-0.2mm less than the workpiece thickness. First, the grinding wheel is moved longitudinally away, and the workpiece passes through the front pressure plate and the rear pressure plate. Then, the workpiece is fixedly connected to the connecting plate by connecting threaded pins. Then, the grinding wheel moves above the workpiece and begins to descend for grinding. Each descent distance does not exceed 0.02mm. Turning the handwheel crank can drive the lead screw to rotate, thus moving the workpiece. By slowly moving the grinding wheel downwards, the workpiece is fed until the designed thickness of the workpiece is reached. This device avoids the problem of deformation caused by side clamping of the workpiece. The vertical micro-movement of the grinding wheel ensures the accuracy of the feed and ensures that the workpiece thickness is within the tolerance range.
[0022] 2. The workpiece is moved left and right by manually cranking the handwheel handle without stopping, which avoids the formation of a scorched surface on the workpiece, improves the yield rate and work efficiency. At the same time, during grinding, the front and rear pressure plates press the workpiece downward with spring pressure, which improves the stability of workpiece movement and grinding. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is the overall assembly drawing of the gas turbine sealing strip thickness grinding fixture proposed in this application;
[0025] Figure 2 This is an assembly drawing of the fixing device for the gas turbine sealing strip thickness grinding fixture proposed in this application;
[0026] Figure 3 This is an enlarged view of the rear pressure plate of the gas turbine sealing strip thickness grinding fixture proposed in this application;
[0027] Figure 4 This is an enlarged view of the base of the gas turbine sealing strip thickness grinding fixture proposed in this application.
[0028] In the picture:
[0029] 1. Base; 2. Grinding wheel; 3. Front pressure plate; 4. Rear pressure plate; 5. Front fixed plate; 6. Rear fixed plate; 7. Front spring pressure plate; 8. Rear spring pressure plate; 9. Front pressure rod pin; 10. Rear pressure rod pin; 11. Connecting threaded pin; 12. Sealing strip product; 13. Front rotating pin; 14. Rear rotating pin; 15. Lead screw; 16. Guide rail slider; 17. Handwheel crank; 18. Fixed block connecting plate; 19. Front and rear fixed block mounting grooves; 20. Fixed groove; 21. Product guide groove; 22. Connecting block. Detailed Implementation
[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0031] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0033] This application discloses a tooling for grinding the thickness of gas turbine sealing strips. Please refer to [link / reference]. Figure 1 and Figure 2 The system includes a fixed block connecting plate 18 and a base 1. The base 1 is fixedly mounted on the top surface of the fixed block connecting plate 18, and a lead screw 15 is threaded through one end of the fixed block connecting plate 18. A guide rail slider 16 is threaded onto the surface of the lead screw 15, which is a common moving mechanism. The top surface of the guide rail slider 16 is fixedly connected to the connecting block 22. The top surface of the base 1 has a product guide groove 21, and a sealing strip product 12 is slidably inserted into the inner side of the product guide groove 21. The sealing strip product 12 is only for illustrative purposes and is easy to understand. One end of the sealing strip product 12 is fixedly connected to the other end of the connecting block 22 through a connecting threaded pin 11.
[0034] The grinding wheel 2 serves as the grinding component. It is positioned above the base 1, with a front fixed plate 5 and a rear fixed plate 6 fixedly mounted on both sides of the grinding wheel 2 on the top surface of the base 1. The front fixed plate 5 and the rear fixed plate 6 are rotatably connected to the front pressure plate 3 and the rear pressure plate 4 via the front rotating pin 13 and the rear rotating pin 14, respectively. The front pressure plate 3 and the rear pressure plate 4 are fixedly mounted on the outer sides of the top surface of the base 1 via the front pressure rod pin 9 and the rear pressure rod pin 10, respectively. The front pressure rod pin 9 and the rear pressure rod pin 10 move up and down through springs at both ends. The surfaces of the front pressure plate 7 and the rear pressure plate 8 are provided with guide grooves for the front pressure rod pin 9 and the rear pressure rod pin 10 to move up and down. The springs press the front pressure rod pin 9 and the rear pressure plate 4 together with the spring force, thereby pressing the workpiece.
[0035] Please refer to Figure 2 and Figure 3 The bottom surfaces of the front pressure plate 3 and the rear pressure plate 4 are both provided with rounded corners to facilitate the workpiece to pass through. The surfaces of the front pressure plate 3 and the rear pressure plate 4 are provided with assembly holes for the front rotating pin 13 and the rear rotating pin 14 to pass through. The surface of the rear pressure plate 4 is provided with vertical assembly holes for the connecting threaded pin 11 to pass through, which facilitates the assembly and installation by the staff.
[0036] Please refer to Figure 4 The top surface of the base 1 has a front and rear fixing block mounting groove 19. The front fixing plate 5 and the rear fixing plate 6 are respectively located in the front and rear fixing block mounting groove 19. The top surface of the base 1 has a fixing groove 20, which is a common assembly structure.
[0037] Please refer to Figure 2 and Figure 4 The depth of the product guide groove 21 is 0.1-0.2mm less than the workpiece thickness. This value is set to facilitate stable placement of the workpiece, thereby improving grinding accuracy.
[0038] Therefore, when grinding gas turbine sealing strips, the workpiece can be placed inside the product guide groove 21. The depth of the product guide groove 21 is 0.1-0.2mm less than the thickness of the workpiece. First, the grinding wheel 2 is moved longitudinally away, and the workpiece passes through the front pressure plate 3 and the rear pressure plate 4. Then, the workpiece is fixedly connected to the connecting plate by connecting threaded pins 11. Then, the grinding wheel 2 is moved above the workpiece and begins to descend for grinding. Each descent distance does not exceed 0.02mm. The workpiece can be moved by controlling the screw 15 to rotate. The grinding wheel 2 is slowly moved downwards until the workpiece is ground to the designed thickness. This device avoids the problem of deformation caused by side clamping of the workpiece.
[0039] In addition, the vertical micro-movement of the grinding wheel 2 ensures the accuracy of the feed and keeps the workpiece thickness within the tolerance range. At the same time, during grinding, the spring pressure of the front pressure plate 3 and the rear pressure plate 4 presses the workpiece downward, improving the stability of workpiece movement and grinding.
[0040] Optimized, please refer to Figure 1 and Figure 2 A handwheel handle 17 is fixedly installed at the other end of the lead screw 15 for easy rotation. The grinding wheel 2 is used in conjunction with a drive mechanism and a lifting mechanism, which are common drive structures in this field and are not shown in the figure. The drive mechanism can be, for example, an electric motor, and the lifting mechanism can be, for example, an electric cylinder. By manually turning the handwheel handle 17, the workpiece can be moved left and right without stopping, avoiding the formation of a scorched surface on the workpiece, improving the yield and work efficiency. Moreover, the manual turning of the handwheel handle 17 allows the operator to judge the actual working conditions and adjust the speed of the workpiece's left and right movement, thus facilitating control.
[0041] Please see Figure 1 and Figure 2 The bottom surface of the guide rail slider 16 slides against the top surface of one end of the fixed block connecting plate 18. The fixed block connecting plate 18 provides support for the guide rail slider 16 during its movement, thereby improving the stability of the guide rail slider 16's movement.
[0042] In summary, the implementation principle of the gas turbine sealing strip thickness grinding fixture in this embodiment is as follows: When grinding the gas turbine sealing strip, the workpiece can be placed inside the product guide groove 21. The depth of the product guide groove 21 is 0.1-0.2mm less than the thickness of the workpiece. First, the grinding wheel 2 is moved longitudinally away, and the workpiece passes through the front pressure plate 3 and the rear pressure plate 4. Then, the workpiece is fixedly connected to the connecting plate by connecting threaded pins 11. Then, the grinding wheel 2 is moved above the workpiece and begins to descend for grinding. Each descent distance does not exceed 0.02mm. Turning the handwheel handle 17 can drive the lead screw 15 to rotate, thereby moving the workpiece. By slowly moving the grinding wheel 2 downward, it is fed until the workpiece is ground to the designed thickness.
[0043] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A gas turbine seal strip thickness grinding tool characterized by: The device includes a fixed block connecting plate (18) and a base (1). The base (1) is fixedly installed on the top surface of the fixed block connecting plate (18), and a screw rod (15) is threaded through one end of the fixed block connecting plate (18). A guide rail slider (16) is threaded onto the surface of the screw rod (15). The top surface of the guide rail slider (16) is fixedly connected to the connecting block (22). A product guide groove (21) is opened on the top surface of the base (1), and a sealing strip product (12) is slidably inserted into the inner side of the product guide groove (21). One end of the sealing strip product (12) is fixedly connected to the other end of the connecting block (22) through a connecting threaded pin (11). A grinding wheel (2) is provided above the base (1), and a front fixing plate (5) and a rear fixing plate (6) are fixedly installed on both sides of the grinding wheel (2) on the top surface of the base (1). The front fixing plate (5) and the rear fixing plate (6) are rotatably connected to the front pressure plate (3) and the rear pressure plate (4) through the front rotating pin (13) and the rear rotating pin (14), respectively. The front pressure plate (3) and the rear pressure plate (4) are fixedly installed on the outer side of the base (1) on the top surface of the base (1) through the front pressure plate (3) and the rear pressure plate (8), respectively. The front pressure plate (7) and the rear pressure plate (8) abut against the other end of the top surface of the front pressure plate (3) and the rear pressure plate (4) through the front pressure rod pin (9) and the rear pressure rod pin (10), respectively.
2. The gas turbine seal strip thickness grinding tooling of claim 1, characterized by: The bottom surface of the other end of the front pressure plate (3) and the rear pressure plate (4) are provided with rounded corners, and the surfaces of the front pressure plate (3) and the rear pressure plate (4) are provided with assembly holes for the front rotating pin (13) and the rear rotating pin (14) to pass through. The surface of the rear pressure plate (4) is provided with a vertical assembly hole for the connecting threaded pin (11) to pass through.
3. The gas turbine seal strip thickness grinding tooling of claim 1, characterized by: A handwheel handle (17) is fixedly installed at the other end of the lead screw (15).
4. The gas turbine seal strip thickness grinding tooling of claim 1, characterized by: The grinding wheel (2) is used in conjunction with a drive mechanism and a lifting mechanism.
5. The gas turbine seal strip thickness grinding tooling of claim 1, characterized by: The base (1) has a front and rear fixing block mounting groove (19) on its top surface, and the front fixing plate (5) and the rear fixing plate (6) are respectively located in the front and rear fixing block mounting groove (19).
6. The gas turbine seal strip thickness grinding tooling of claim 1, characterized by: The base (1) has a fixing groove (20) on its top surface.
7. The gas turbine seal strip thickness grinding tooling of claim 1, characterized by: The depth of the product guide groove (21) is 0.1-0.2 mm less than the thickness of the workpiece.
8. The gas turbine seal strip thickness grinding tooling of claim 1, characterized by: The bottom surface of the guide rail slider (16) slides against the top surface of one end of the fixed block connecting plate (18).