A turbine blade internal flow passage abrasive grain flow polishing clamp

Abstract

The utility model relates to abrasive particle flow polishing technical field, a turbine blade internal flow channel abrasive particle flow polishing clamp, include: bottom cover for supporting turbine blade and tenon opposite one end, bottom cover is equipped with for leading out abrasive guide exit, the sleeve of bottom open, the sleeve is placed on the bottom cover, the top cover is equipped with the inlet in the corresponding position with sleeve, for leading into the air inlet on tenon with abrasive, the fixed support spare of fixedly being equipped with in the inside of sleeve is equipped with with tenon tooth groove cooperation's analog groove to and is equipped with two support surface for supporting the air inlet side and exhaust side of tenon, and movable support spare is used for supporting the back of tenon side, and its both sides are closely contacted with fixed support spare, and the sleeve is equipped with the gap, and the movable support spare is slidably arranged in the gap and is locked through locking part, the utility model discloses can replace the present mode to the surface treatment of turbine blade internal flow channel through the mode of abrasive particle flow polishing, improves the surface quality of turbine blade internal flow channel.

Description

Technical Field

[0001] This utility model relates to the field of abrasive flow polishing technology, and more specifically, to an abrasive flow polishing fixture for the internal flow channel of a turbine blade. Background Technology

[0002] Due to cooling requirements, turbine blades are designed with a hollow structure. During the casting process, burrs can easily appear on the hole walls and inside the channels, affecting the surface integrity of the blade's internal cavity and thus weakening its fatigue performance. Therefore, surface treatment is typically performed on the internal channels of turbine blades. Common surface treatment methods for turbine blade internal channels include hydraulic grinding and vibratory finishing. However, hydraulic grinding requires frequent adjustments to the spray angle and pressure, making it difficult to achieve high-volume, rapid processing. Vibratory finishing machines have requirements for abrasive particle size, and are generally ineffective for channels with small diameters (0.3–0.7 mm).

[0003] Currently, abrasive flow polishing of the internal surfaces of workpieces is increasingly used across various industries. Applying abrasive flow polishing to the surface treatment of the internal flow channels of turbine blades would effectively address the shortcomings of existing surface treatment methods. Abrasive flow equipment typically includes an upper abrasive cylinder and a lower abrasive cylinder. During operation, a fixture that fixes the workpiece and forms a sealed chamber is clamped between the upper and lower abrasive cylinders. Therefore, if abrasive flow polishing is to be used on the internal flow channels of turbine blades, providing a fixture for fixing the turbine blades and forming a sealed chamber is a problem that urgently needs to be solved in this field. Utility Model Content

[0004] The purpose of this invention is to provide a turbine blade internal flow channel abrasive flow polishing fixture, which replaces the existing method to perform surface treatment on the turbine blade internal flow channel by abrasive flow polishing, thereby improving the surface quality of the turbine blade internal flow channel.

[0005] This utility model is achieved through the following technical solution:

[0006] A turbine blade internal flow channel abrasive flow polishing fixture, comprising:

[0007] The bottom cover is used to support the end of the turbine blade opposite to the tenon, and the bottom cover is provided with an outlet for discharging abrasive.

[0008] A sleeve with an open bottom, placed on the bottom cover;

[0009] The top cover and the sleeve are provided with inlet ports at corresponding positions for guiding the abrasive into the air inlet on the tenon;

[0010] The fixed support is fixed inside the sleeve. It has a contour groove that mates with the tenon tooth groove and has two support surfaces for supporting the air intake side and the exhaust side of the tenon.

[0011] And a movable support for supporting the back side of the tenon, with its two sides in close contact with the fixed support. The sleeve has a notch, and the movable support is slidably disposed at the notch and locked by a locking component.

[0012] Optionally, the locking component includes a support base, a locking screw, and a handle. The support base is fixedly connected to the outside of the sleeve, the locking screw is threadedly connected to the support base, the handle is located at the outer end of the locking screw, and the inner end of the locking screw is rotatably connected to the movable support.

[0013] Optionally, the movable support member has protruding sliders on both sides, and the fixed support member has a groove that cooperates with the sliders.

[0014] Optionally, the movable support member has a T-shaped groove extending through the height direction at one end near the locking screw, and the inner end of the locking screw has a T-shaped head that mates with the T-shaped groove.

[0015] Optionally, the fixed support includes a toothed positioning block, an intake-side support block, and an exhaust-side support block, which are respectively fixedly connected to the sleeve, and the toothed positioning block is in close contact with the intake-side support block and the exhaust-side support block respectively; the contour groove is provided on the toothed positioning block, and the support surface is provided on the intake-side support block and the exhaust-side support block.

[0016] Optionally, the bottom cover is provided with a bottom positioning groove that mates with the lower end of the sleeve, and the top cover is provided with a top positioning groove that mates with the upper end of the sleeve.

[0017] Optionally, the top surface of the top cover, the bottom surface of the bottom cover, and the top and bottom surfaces of the sleeve are all provided with annular sealing grooves, and annular sealing rings are provided in the annular sealing grooves.

[0018] Optionally, the contact surface between the fixing support and the inner wall of the sleeve is coated with glass glue.

[0019] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, a sealed cavity is formed by the sleeve and the bottom cover, and the turbine blade is supported and fixed by the bottom cover, the movable support and the fixed support. In practical application, the bottom cover is placed on the lower abrasive cylinder of the abrasive flow device, the top cover is in contact with the upper abrasive cylinder of the abrasive flow device, and the entire clamp is clamped between the upper abrasive cylinder and the lower abrasive cylinder, so that the surface treatment of the internal flow channel of the turbine blade can be replaced by the existing method by abrasive flow polishing, thereby improving the surface quality of the internal flow channel of the turbine blade. Attached Figure Description

[0020] Figure 1 This is an enlarged structural schematic diagram of a turbine blade in the prior art;

[0021] Figure 2 A schematic diagram of the structure of an abrasive flow polishing fixture for the internal flow channel of a turbine blade provided by this utility model;

[0022] Figure 3 A front view of an abrasive flow polishing fixture for the internal flow channel of a turbine blade provided by this utility model;

[0023] Figure 4 A front sectional view of an abrasive flow polishing fixture for the internal flow channel of a turbine blade provided by this utility model;

[0024] Figure 5 for Figure 3 AA section view in the middle;

[0025] Figure 6 for Figure 3 BB section view in the middle;

[0026] Figure 7 This is an enlarged structural diagram of the movable support component;

[0027] Figure 8 This is an enlarged structural diagram of the toothed positioning block;

[0028] Reference numerals: 1-bottom cover, 101-support part, 102-outlet, 2-top cover, 201-inlet, 3-sleeve, 4-toothed positioning block, 401-contour groove, 5-inlet side support block, 6-exhaust side support block, 7-movable support, 701-slider, 702-T-slot, 8-support seat, 9-locking screw, 10-handle, 11-turbine blade, 1101-back side, 1102-inlet side, 1103-exhaust side, 1104-toothed groove, 1105-inlet. Detailed Implementation

[0029] refer to Figures 2-6 A turbine blade internal flow channel abrasive flow polishing fixture includes a bottom cover 1, a sleeve 3, a top cover 2, a fixed support and a movable support 7.

[0030] The bottom cover 1 is used to support one end of the turbine blade 11 opposite to the tenon. Specifically, the bottom cover 1 has a support part 101 on its top, and the top surface of the support part 101 is designed according to the turbine blade 11 (its structure is shown in the figure below). Figure 1 The end of the sleeve 3 opposite the tenon is designed with a contoured shape. The bottom of the sleeve 3 is open, and the sleeve 3 is placed on the bottom cover 1.

[0031] The fixed support is fixed inside the sleeve 3, and it has a contour groove 401 that mates with the tenon tooth groove 1104 (see reference). Figure 8It has two support surfaces for supporting the intake side 1102 and exhaust side 1103 of the tenon; the movable support 7 is used to support the back side 1101 of the tenon, and its two sides are in close contact with the fixed support. The sleeve 3 has a notch, and the movable support 7 is slidably set at the notch and locked by the locking component, so as to keep the movable support 7 away from the turbine blade 11, thereby facilitating the disassembly and assembly of the turbine blade 11.

[0032] In practical applications, the turbine blade 11 is inserted into the fixed space inside the sleeve 3. The contour groove 401 on the fixed support engages with the toothed groove 1104 on the tenon. The support surface on the fixed support presses the intake side 1102 and exhaust side 1103 of the tenon against each other. Then, the movable support 7 presses the back side 1101 of the tenon and locks it with the locking component. Finally, the sleeve 3 is placed on the bottom cover 1, thus completing the installation of the turbine blade 11. In practical applications, the bottom cover 1 is placed on the lower abrasive cylinder of the abrasive flow equipment, and the top cover 2 is in contact with the upper abrasive cylinder of the abrasive flow equipment. The entire fixture is clamped between the upper and lower abrasive cylinders. The top cover 2 and the sleeve 3 are provided with inlet ports 201 at corresponding positions for introducing abrasive into the air inlet 1105 at the end of the tenon. The bottom cover 1 is provided with an outlet port 102 for discharging abrasive. In this way, the surface treatment of the internal flow channel of the turbine blade 11 can be replaced by abrasive flow polishing, thereby improving the surface quality of the internal flow channel of the turbine blade 11.

[0033] Preferably, after the turbine blade 11 is installed, its tenon end is parallel to the bottom cover 1. This is easily understood, and can be controlled by adjusting the specific orientation of the contour groove 401 on the fixed support. Furthermore, it is easy to understand that to ensure the abrasive completely enters the air inlet 1105 at the tenon end, the tenon end must be flush with the top surface of the movable support 7 and the top surface of the fixed support. At the same time, the top surfaces of the movable support 7 and the fixed support should abut against the inner top surface of the sleeve 3.

[0034] Furthermore, it is easy to understand that if there are holes on the tenon that do not require polishing, they are sealed with plastic plugs (such as rubber plugs), and the plugs are pressed tightly on the corresponding side by the fixed support or the movable support 7.

[0035] In this embodiment, the bottom cover 1 is provided with a bottom positioning groove that mates with the lower end of the sleeve 3, and the top cover 2 is provided with a top positioning groove that mates with the upper end of the sleeve 3. This arrangement facilitates the quick and accurate assembly of the bottom cover 1, the sleeve 3 and the top cover 2, thereby improving assembly efficiency.

[0036] In this embodiment, the top surface of the top cover 2, the bottom surface of the bottom cover 1, and the top and bottom surfaces of the sleeve 3 are all provided with annular sealing grooves, and annular sealing rings are provided in the annular sealing grooves, thereby improving the sealing between the bottom cover 1 and the sleeve 3, between the top cover 2 and the sleeve 3, between the upper abrasive cylinder and the top cover 2, and between the lower abrasive cylinder and the bottom cover 1, and preventing abrasive leakage.

[0037] In this embodiment, the fixed support is a split type, which facilitates processing and assembly. It includes a toothed positioning block 4, an intake-side support block 5, and an exhaust-side support block 6, all of which are fixedly connected to the sleeve 3. Specifically, the toothed positioning block 4, the intake-side support block 5, and the exhaust-side support block 6 are all connected to the sleeve 3 by screws. Based on this, a contoured groove 401 is provided on the toothed positioning block 4, and the support surface is provided on the intake-side support block 5 and the exhaust-side support block 6. The toothed positioning block 4 is in close contact with the intake-side support block 5 and the exhaust-side support block 6 respectively. In practical applications, the contact surfaces between the toothed positioning block 4 and the intake-side support block 5, between the toothed positioning block 4 and the exhaust-side support block 6, and between the toothed positioning block 4, the intake-side support block 5, the exhaust-side support block 6, and the interior of the sleeve 3 are all coated with silicone sealant to improve sealing. It should be understood that the split type of the fixed support is only an option and not a limitation; in other embodiments, the fixed support can of course be a single piece.

[0038] In this embodiment, the locking component has the following specific structure: it includes a support base 8, a locking screw 9, and a handle 10. The support base 8 is fixedly connected to the outside of the sleeve 3. The locking screw 9 is threadedly connected to the support base 8. The handle 10 is located at the outer end of the locking screw 9, and the inner end of the locking screw 9 is rotatably connected to the movable support member 7. Thus, rotating the handle 10 causes the locking screw 9 to screw in or out, thereby causing the movable support member 7 to press against or move away from the tenon's back side 1101. It should be understood that the above-described structure of the locking component is only an option and not a limitation. In other embodiments, other structures can be used, such as the movable support member 7 contacting the back side 1101 of the tenon and being secured by a screw. After removing or loosening the screw, the movable support member 7 can move away from the tenon.

[0039] Further, refer to Figure 7 In this embodiment, the movable support 7 has protruding sliders 701 on both sides, and the fixed support has grooves that cooperate with the sliders 701. Based on the above-mentioned split structure of the fixed support, the grooves are provided on the intake side support block 5 and the exhaust side support block 6. It is worth noting that the cooperation between the sliders 701 and the grooves allows the movable support 7 to be supported, preventing the movable support 7 from shifting downward.

[0040] In this embodiment, the inner end of the locking screw 9 is rotatably connected to the movable support 7 as follows: the movable support 7 has a T-shaped groove 702 extending through the height direction at one end near the locking screw 9, and the inner end of the locking screw 9 has a T-shaped head that mates with the T-shaped groove 702. It should be understood that the above-described rotatable connection method is only an option and not a limitation. In other embodiments, other methods can be used to achieve the rotatable connection, such as connecting the inner end of the locking screw 9 to the movable support 7 via a bearing.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A turbine blade internal flow channel abrasive polishing fixture, characterized in that, include: The bottom cover is used to support the end of the turbine blade opposite to the tenon, and the bottom cover is provided with an outlet for discharging abrasive. A sleeve with an open bottom, placed on the bottom cover; The top cover and the sleeve are provided with inlet ports at corresponding positions for guiding the abrasive into the air inlet on the tenon; The fixed support is fixed inside the sleeve. It has a contour groove that mates with the tenon tooth groove and has two support surfaces for supporting the air intake side and the exhaust side of the tenon. And a movable support for supporting the back side of the tenon, with its two sides in close contact with the fixed support. The sleeve has a notch, and the movable support is slidably disposed at the notch and locked by a locking component.

2. The turbine blade internal flow channel abrasive polishing fixture according to claim 1, characterized in that, The locking component includes a support base, a locking screw, and a handle. The support base is fixedly connected to the outside of the sleeve, the locking screw is threadedly connected to the support base, the handle is located at the outer end of the locking screw, and the inner end of the locking screw is rotatably connected to the movable support.

3. The turbine blade internal flow channel abrasive polishing fixture according to claim 2, characterized in that, The movable support has protruding sliders on both sides, and the fixed support has grooves that cooperate with the sliders.

4. The turbine blade internal flow channel abrasive polishing fixture according to claim 2, characterized in that, The movable support member has a T-shaped groove extending through the height direction at one end near the locking screw, and the inner end of the locking screw has a T-shaped head that mates with the T-shaped groove.

5. The turbine blade internal flow channel abrasive polishing fixture according to claim 1, characterized in that, The fixed support includes a toothed positioning block, an intake-side support block, and an exhaust-side support block, which are fixedly connected to the sleeve respectively, and the toothed positioning block is in close contact with the intake-side support block and the exhaust-side support block respectively; the contour groove is provided on the toothed positioning block, and the support surface is provided on the intake-side support block and the exhaust-side support block.

6. The turbine blade internal flow channel abrasive flow polishing fixture according to any one of claims 1-5, characterized in that, The bottom cover is provided with a bottom positioning groove that mates with the lower end of the sleeve, and the top cover is provided with a top positioning groove that mates with the upper end of the sleeve.

7. The turbine blade internal flow channel abrasive polishing fixture according to any one of claims 1-5, characterized in that, The top surface of the top cover, the bottom surface of the bottom cover, and the top and bottom surfaces of the sleeve are all provided with annular sealing grooves, and annular sealing rings are provided in the annular sealing grooves.

8. The turbine blade internal flow channel abrasive flow polishing fixture according to any one of claims 1-5, characterized in that, The contact surface between the fixed support and the inner wall of the sleeve is coated with glass glue.

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