An engine blade film hole fluid polishing device

Abstract

The application discloses an engine blade film hole fluid polishing device and relates to the field of film hole polishing.The device comprises a supporting base, a conveying component arranged above the supporting base, and a clamping component for clamping an engine blade and slidingly arranged on the supporting base.The conveying component comprises a first rotating plate, one side of the first rotating plate is provided with a second rotating plate, and the first rotating plate and the second rotating plate are provided with a first cladding block and a second cladding block.The device is matched with a ring valve control mechanism through an openable and closable half-cylinder structure, independent cavity-by-cavity polishing of a blade leading edge cavity, a middle cavity and a trailing edge cavity is realized, only a target cavity is kept open, and the rest of the cavities are completely closed, fine grinding of each cavity is completed under the condition of constant pressure, constant flow and constant speed, defects of excessive polishing of some cavities and insufficient polishing of some cavities caused by traditional whole polishing are avoided from the source, uniformity of roughness of inner walls of the cavities is ensured, and geometric precision and surface integrity of an edge of a film hole outlet are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of film pore polishing, specifically to a fluid polishing device for film pores of engine blades. Background Technology

[0002] Turbine blades are core hot-end components of aero-engine propulsion systems, and their service performance directly determines the engine's thrust-to-weight ratio, fuel efficiency, and operational reliability. Modern high-performance aero-engines typically operate at turbine inlet temperatures exceeding the melting point limits of high-temperature alloy substrates. Therefore, film cooling technology has become the mainstream solution for turbine blade thermal protection. This involves machining multiple independent cooling chambers inside the blade, including leading-edge chambers, multiple intermediate chambers, and trailing-edge chambers, and correspondingly machining hundreds of micron-sized film cooling holes on the blade surface. Cooling airflow enters the internal chambers from the blade inlet, exits through the film cooling holes, and forms a continuous and uniform insulating film layer on the blade surface. This achieves thermal isolation between the high-temperature combustion gases and the blade substrate, ensuring stable operation of the blade in ultra-high-temperature environments.

[0003] The machining quality of film cooling orifices is a core factor affecting the film cooling effect. The inner wall roughness, outlet edge roundness, and orifice shape consistency directly determine the uniformity of the cooling airflow and the wall insulation effect, and also directly impact the high-temperature fatigue life and service safety of the blades. Currently, high-performance aero-engines require high-precision machining of film cooling orifices with an inner wall roughness Ra≤0.2μm and an orifice diameter tolerance of ±0.005mm, placing extremely high demands on the controllability and consistency of the polishing process.

[0004] Currently, fluid polishing technology is commonly used for the finishing of film cooling holes, relying on a fluid medium carrying abrasive particles to flow through the channels to achieve micro-cutting polishing. However, existing fluid polishing processes mostly adopt a whole-flow grinding method, where the abrasive fluid enters from the blade inlet and flows through all internal chambers and corresponding film cooling holes simultaneously, making it impossible to achieve independent pressure and flow control for different independent chambers. Due to significant differences in flow resistance, number of film cooling holes, and hole diameters among different chambers, whole-flow grinding is prone to problems such as over-grinding of the leading edge chamber with lower flow resistance and out-of-tolerance film cooling hole diameters, under-grinding of the middle chamber with higher flow resistance and substandard inner wall roughness, and uneven removal of edge burrs and out-of-tolerance precision in the trailing edge slit due to abrupt changes in the flow channel cross-section. At the same time, the flow field driving force of whole-flow grinding is limited, and abrasive particles are easily left at the turning holes of the S-shaped cooling flow channel, causing defects such as film cooling hole blockage, hole diameter deviation, and poor consistency of processing within the same batch of blades. This cannot meet the high-precision batch processing requirements of high-performance aero-engine turbine blades and has become a technical bottleneck restricting the processing efficiency and service performance of film cooling blades. Summary of the Invention

[0005] The purpose of this invention is to provide a fluid polishing device for the air film pores of engine blades to solve the problems mentioned in the background art.

[0006] A fluid polishing device for the film coating holes of an engine blade includes a support base, a conveying component above the support base, and a clamping component for clamping the engine blade slidably mounted on the support base. The conveying component includes a first rotating plate, a second rotating plate on one side of the first rotating plate, a first covering block and a second covering block between the first and second rotating plates, the first covering block and the second covering block being spliced ​​together to form a cylindrical body, the engine blade being located at the center of the cylindrical body, a first supporting slider being fixedly mounted on one end of the first covering block near the second rotating plate, a second supporting slider being fixedly mounted on one end of the second covering block near the second rotating plate, both the first and second supporting sliders being slidably engaged on the second rotating plate, a matching sliding rod being fixedly mounted on one side of the first rotating plate near the second rotating plate, and both the first and second covering blocks being slidably connected to the matching sliding rod at the ends near the first rotating plate, and multiple communicating grooves being formed on both the first and second covering blocks.

[0007] Furthermore, a housing component is fixedly installed above the support base. The housing component includes a protective housing. The second rotating plate is movably engaged in the middle of the protective housing. A flow housing is slidably engaged inside the protective housing. Multiple sealing blocks are also movably engaged inside the protective housing. The flow housing and multiple sealing blocks are evenly distributed in a circle. The flow housing has an opening. A return pipe is fixedly installed outside the protective housing. The flow housing is connected to the return pipe.

[0008] Furthermore, multiple evenly distributed third piston rods are fixedly installed on both the flow housing and the sealing block. Multiple sealed chambers that cooperate with the third piston rods are opened on the protective housing. The third piston rods are slidably locked inside the sealed chambers. Multiple pipe supports corresponding to the sealed chambers are fixedly installed on the outside of the protective housing. A main pipe is fixedly installed on each of the multiple pipe supports. The multiple main pipes are connected to the output end of an external hydraulic press after being combined by a pipe.

[0009] Furthermore, two locking sliders, perpendicularly distributed to the first and second support sliders, are slidably mounted on the side of the second rotating plate away from the first rotating plate. The locking sliders are slidably mounted on the second rotating plate. Fixing frames are fixedly mounted on both the first and second support sliders. Connecting arms rotatably connect the locking sliders and their corresponding fixing frames. A center block is fixedly mounted in the middle of the side of the second rotating plate away from the first rotating plate. Threaded rods are rotatably mounted on both sides of the center block corresponding to the locking sliders. The locking sliders are threadedly fitted onto the outside of the corresponding threaded rods. A secondary bevel gear is fixedly mounted at the end of the threaded rod. A main bevel gear is provided on the side of the second rotating plate away from the first rotating plate. Both secondary bevel gears mesh with the main bevel gear. The main bevel gear is rotatably mounted on a protective housing. A servo motor for driving the main bevel gear is fixedly mounted on the protective housing.

[0010] Furthermore, the protective housing has multiple annularly distributed slots at one end near the servo motor. Limiting springs are fixedly installed inside the slots, and limiting balls are fixedly installed at the ends of the limiting springs. The second rotating plate has an annular groove that cooperates with the limiting balls.

[0011] Furthermore, the clamping component includes a movable frame, on which a rotating bracket is fixedly mounted. A first pressure cylinder is fixedly mounted in the middle of the rotating bracket. A clamping head is rotatably mounted on one end of the first pressure cylinder. The clamping head has a clamping opening. Baffles are rotatably mounted on both sides of the clamping head. A connecting frame is fixedly connected between the two baffles.

[0012] Furthermore, the first pressure cylinder has a feeding port, and an annular sealing sleeve is rotatably installed on the first pressure cylinder at a position corresponding to the feeding port. The annular sealing sleeve has an opening groove corresponding to the feeding port. A first piston rod is slidably installed inside the first pressure cylinder, and a first piston head is fixedly installed at one end of the first piston rod inside the first pressure cylinder.

[0013] Furthermore, a second pressure cylinder is fixedly installed on the movable frame, a second piston rod slides inside the second pressure cylinder, a second piston head is fixedly installed at one end of the second piston rod located inside the second pressure cylinder, a side sealing cavity is integrally formed on the side of the second pressure cylinder near the return pipe, a return inner cylinder is fixedly installed on the return pipe, the return inner cylinder is slidably locked inside the side sealing cavity, and a conveying groove is connected between the second pressure cylinder and the side sealing cavity.

[0014] Furthermore, a hydraulic cylinder is fixedly installed on the movable frame, and a connecting rod is fixedly installed on the drive end of the hydraulic cylinder. The second piston rod and the movable frame are both fixedly installed on the connecting rod. A waste bin is fixedly installed on the movable frame, and the waste bin is located below the clamping head.

[0015] Furthermore, a pressure switch is fixedly installed inside the protective housing, a pointer is fixedly installed on the first rotating plate, and a plurality of position slots corresponding to the communicating groove are opened at one end of the protective housing near the first rotating plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This device, through the cooperation of an openable semi-cylindrical structure and an annular valve control mechanism, enables independent, chamber-by-chamber grinding of the leading edge, middle, and trailing edge chambers of the blade. Only the flow channel corresponding to the target chamber is kept open, while the remaining chambers are completely closed. This ensures that each chamber is finely ground under constant pressure, constant flow, and constant speed conditions, thus avoiding the defects of over-grinding and under-grinding of some chambers caused by traditional whole-process grinding. It also ensures that the roughness of the inner wall of each chamber is uniform and consistent, and significantly improves the geometric accuracy and surface integrity of the gas film vent outlet edge. 2. This device adopts a coaxial linkage dual-piston structure, which simultaneously realizes positive pressure pushing and negative pressure suction when injecting abrasive, forming a bidirectional circulating flow field in the air film hole to enhance the abrasive cutting effect; during the grinding process, the reciprocating motion of the piston can realize bidirectional scouring, and the reverse suction of abrasive and the cleaning of the channel can be completed without disassembling the blades, which not only improves grinding efficiency and hole diameter accuracy, but also completely avoids hole diameter deviation and channel blockage caused by abrasive residue; 3. This device can intuitively identify the current grinding chamber position through the corresponding cooperation of the positioning pointer and the annular marking groove, making the entire operation process visible; with the spring-loaded design of the elastic locking pin, the physical "click" feedback serves as a confirmation signal for precise positioning, eliminating the need for additional testing to determine the clamping status, greatly improving the transparency of operation and positioning accuracy, and avoiding leakage and displacement problems caused by incorrect cavity grinding and improper clamping. 4. This device integrates blade clamping, abrasive injection, online cleaning and waste liquid recycling functions through a clamping mechanism. After grinding, the cleaning liquid can be injected directly without disassembling the blade. Pulse-style deep cleaning of the channel and blade surface is achieved by alternating positive and negative pressure. The cleaning waste liquid and residual abrasive can be directly guided to the recycling tank for unified collection, reducing positioning errors caused by multiple process transfers and secondary clamping, greatly shortening the processing cycle of a single blade, and reducing the intensity of manual operation. 5. This device adopts a two-stage progressive clamping scheme of semi-cylinder flexible pre-clamping and outer ring hydraulic rigid locking. First, the connecting rod drives the semi-cylinder to close and complete the pre-positioning of the blade without damage. Then, the hydraulic drive drives the annular pad to shrink synchronously and complete the overall locking of the cylinder. The clamping process is uniformly stressed, which not only avoids blade deformation during clamping, but also ensures that there is no displacement of the cylinder and no leakage in the flow channel during the grinding process. The locking state is maintained synchronously when the chamber switches and rotates, and the positioning accuracy and sealing reliability are significantly improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention from one perspective; Figure 2 This is a structural schematic diagram of the invention from another perspective; Figure 3 This is a schematic diagram of the conveying component in this invention; Figure 4 This is a schematic diagram of the structure of the first and second covering blocks in this invention; Figure 5 This is a schematic diagram of the threaded rod and the secondary bevel gear in this invention; Figure 6 This is a cross-sectional view of the protective shell in this invention; Figure 7 This is a schematic diagram of the outer shell component in this invention; Figure 8 This is a schematic diagram of the clamping component in this invention; Figure 9 This is a schematic diagram of the clamping head in this invention; Figure 10 This is a schematic diagram of the structure of the second pressure cylinder in this invention; Figure 11 This is a schematic diagram of the structure of an engine blade in the prior art; Figure 12 This is a schematic diagram of the cross-sectional structure of an engine blade in the prior art.

[0018] In the diagram: 1. Support base; 2. Clamping component; 3. Conveying component; 4. Housing component; 5. Servo motor; 21. Moving frame; 22. First pressure cylinder; 23. Clamping head; 24. Hydraulic cylinder; 25. Second pressure cylinder; 26. Waste bin; 31. First rotating plate; 32. Second rotating plate; 33. First covering block; 34. Second covering block; 35. Main bevel gear; 41. Protective housing; 42. Flow housing; 43. Pipe support; 44. Limiting spring; 45. Pressure switch; 211. Rotating bracket; 221. First piston rod; 222. Feed port; 223. Annular sealing sleeve; 224. Opening groove; 23 1. Clamping port; 232. Baffle; 233. Connecting frame; 241. Connecting rod; 251. Second piston rod; 252. Side sealing cavity; 253. Conveying trough; 311. Matching slide rod; 312. Pointer; 321. Locking slider; 322. Center block; 323. Threaded rod; 324. Secondary bevel gear; 325. Connecting arm; 331. First support slider; 332. Connecting trough; 341. Second support slider; 342. Fixing frame; 411. Positioning groove; 421. Sealing block; 422. Return pipe; 423. Return inner cylinder; 424. Third piston rod; 431. Main pipe; 441. Limiting ball. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-12 This invention provides a technical solution for a fluid polishing device for the film pores of engine blades: The device includes a support base 1, a conveying component 3 above the support base 1, a clamping component 2 for clamping engine blades slidably mounted on the support base 1, and a housing component 4 fixedly mounted above the support base 1. The conveying component 3 includes a first rotating plate 31, a second rotating plate 32 on one side of the first rotating plate 31, a first covering block 33 and a second covering block 34 between the first rotating plate 31 and the second rotating plate 32, the first covering block 33 and the second covering block 34 being joined to form a cylindrical body. The engine blade is located at... At the center of the cylindrical body, a first supporting slider 331 is fixedly installed on one end of the first covering block 33 near the second rotating plate 32, and a second supporting slider 341 is fixedly installed on one end of the second covering block 34 near the second rotating plate 32. Both the first supporting slider 331 and the second supporting slider 341 are slidably locked on the second rotating plate 32. A matching slide rod 311 is fixedly installed on one side of the first rotating plate 31 near the second rotating plate 32. The ends of the first covering block 33 and the second covering block 34 near the first rotating plate 31 are slidably connected to the matching slide rod 311. Multiple communicating grooves 332 are opened on both the first covering block 33 and the second covering block 34.

[0021] Engine blades often need to withstand high temperatures, so many film cooling pores are created on them to form a protective film on the blades, such as... Figure 11 and 12As shown, the engine blade consists of a leading edge cavity, multiple intermediate cavities, and a trailing edge cavity. Each cavity has one or more air film holes. The air film holes corresponding to the leading edge cavity are evenly distributed on the pressure and suction surfaces at the leading edge of the blade. The air film holes corresponding to intermediate cavity one are linearly arranged along the pressure surface of the blade. The air film holes corresponding to intermediate cavity two are distributed in the middle region of the suction surface. The trailing edge cavity often does not have air film holes. Instead, it has a trailing edge slit to guide the cooling airflow to be smoothly discharged along the trailing edge of the blade. Alternatively, multiple trailing edge slots can be opened to guide the airflow to form a uniform jet at the trailing edge of the blade. The leading edge cavity, intermediate cavity one, intermediate cavity two, and trailing edge cavity are connected sequentially through turning holes to form an S-shaped cooling channel. Cooling air enters the leading edge cavity through the air inlet at the bottom of the mounting base. After heat exchange in stages through the S-shaped channel, it is discharged through the trailing edge slit or trailing edge slot. When the airflow passes through, it is sprayed onto the blade surface through the air film holes of the corresponding cavity to form a continuous and stable air film layer. When using this device, the mounting base of the blade to be ground is first clamped by the clamping component 2. At this time, the conveying component 3 is located outside the outer shell component 4. Then, the clamping component 2 is pushed to send the blade into the conveying component 3, and the clamping component 2 is pushed to drive the conveying component 3 into the inner shell component 4. In the initial state, the first covering block 33 and the second covering block 34 are located at diagonal positions respectively. When the conveying component 3 is completely inside the outer shell component 4, the first covering block 33 and the second covering block 34 will gradually move towards the center along the diagonal position under the control of the outer shell component 4. Finally, the first covering block 33 and the second covering block 34 completely wrap the blade. The first covering block 33 and the second covering block 34 are provided with multiple connecting grooves 332. Each connecting groove 332 is connected to the air film of the corresponding chamber of the blade. After the conveying component 3 fully enters the outer casing component 4, the outer casing component 4 will close multiple connecting slots 332, leaving only one connecting slot 332 open. The clamping component 2 will continuously inject fluid abrasive into the engine blade. The closed connecting slot 332 means that the corresponding film gas hole is closed. The film gas hole connected by the only open connecting slot 332 becomes the only channel, which can then perform precise fluid flushing and abrasive grinding on the specific chamber that needs to be ground. When one chamber is ground, the outer casing component 4 will open another connecting slot 332 and close all other connecting slots 332, thereby performing independent and controllable chamber-by-chamber grinding of the leading edge chamber, middle chamber one, middle chamber two and trailing edge chamber in sequence. This ensures that each chamber undergoes constant pressure, constant flow, and constant speed precision processing, guaranteeing uniform roughness of the inner wall of each chamber. This significantly improves the geometric accuracy and surface integrity of the air film outlet edge. Furthermore, it allows for precise grinding only of the chambers that require grinding, preventing over-grinding that could reduce the precision of the air film outlet.

[0022] The outer casing component 4 includes a protective housing 41. A pointer 312 is fixedly installed on the first rotating plate 31. The protective housing 41 has multiple position slots 411 corresponding to the communicating groove 332 at one end near the first rotating plate 31. The protective housing 41 has multiple ring-shaped slots at one end near the servo motor 5. A limit spring 44 is fixedly installed inside the slot. A limit ball 441 is fixedly installed at the end of the limit spring 44. The second rotating plate 32 has an annular groove that cooperates with the limit ball 441.

[0023] When the conveying component 3 enters the housing component 4, the pointer 312 points to one of the position slots 411. The corresponding chamber is marked with pigment on the outside of the position slot 411. When the corresponding chamber is polished, the conveying component 3 will rotate as a whole, which will drive the pointer 312 to rotate until the pointer 312 is aligned with the next position slot 411. This indicates that the device has reached the positioning state of the next chamber to be polished. This allows for real-time observation of the specific position being polished by the device, greatly improving the transparency of operation and the controllability of the process. When the conveying component 3 is about to fully enter, the second rotating plate 32 will first contact the multiple limiting balls 441. The lower half of the limiting balls 441 passes through the slot and extends into the interior of the protective housing 41. If the conveying component 3 is pushed further at this time, the second rotating plate 32 will push the multiple limiting balls 441 upward along the inner wall of the slot, and the limiting spring 44 will be compressed. When the conveying component 3 is fully inside the protective housing 41, under the elastic restoring force of the limiting spring 44, the limiting balls 441 will re-embed into the bottom of the slot, and the limiting balls 441... The lower end will be inserted into the annular groove on the second rotating plate 32. When it is fully inserted, the limiting ball 441 will rebound quickly under the action of the limiting spring 44, which will also produce a knocking effect. This crisp "click" sound is the physical confirmation signal of accurate positioning. In order to facilitate the entry of the conveying component 3, the position of the second rotating plate 32 near the limiting ball 441 is rounded. The inner sides of the annular groove are also rounded. The radius of the rounded corners on both sides of the annular groove is smaller than that of the rounded corners of the second rotating plate 32, ensuring smooth sliding and secure engagement.

[0024] The second rotating plate 32 is movably locked in the middle of the protective housing 41. A flow housing 42 is slidably locked inside the protective housing 41. Multiple sealing blocks 421 are also movably locked inside the protective housing 41. The flow housing 42 and the multiple sealing blocks 421 are evenly distributed in a circle. The flow housing 42 has an opening. A return pipe 422 is fixedly installed on the outside of the protective housing 41. The flow housing 42 is connected to the return pipe 422. A pressure switch 45 is fixedly installed inside the protective housing 41. Multiple evenly distributed third piston rods 424 are fixedly installed on both the flow housing 42 and the sealing blocks 421. Multiple sealed chambers that cooperate with the third piston rods 424 are opened on the protective housing 41. The third piston rods 424 are slidably locked inside the sealed chambers. Multiple pipe supports 43 corresponding to the sealed chambers are fixedly installed on the outside of the protective housing 41. A main pipe 431 is fixedly installed on each of the multiple pipe supports 43. The multiple main pipes 431 are connected to the output end of the external hydraulic press after being combined by the pipes.

[0025] Once the conveying component 3 is fully inside the protective housing 41, the second rotating plate 32 will press the pressure switch 45. The pressure switch 45 generates a pressure signal, which is processed by the signal processor and then sent to the control center outside the device. The control center receives the pressure signal in real time and sends a control signal to control the external hydraulic press to work. The external hydraulic press delivers hydraulic oil into the main pipe 431. The hydraulic oil is pushed into the sealed chamber, and the third piston rod 424 is pushed towards the center, thereby causing the sealing block 421 and the flow housing 42 to move towards the center synchronously. The multiple flow shells 42 and sealing blocks 421 completely cover the cylindrical body formed by the first covering block 33 and the second covering block 34. In the initial state, the flow shell 42 is connected to the connecting groove 332 corresponding to the leading edge cavity of the blade. Since there are no openings on the other sealing blocks 421, the other connecting grooves 332 are all in a closed state. As the clamping component 2 continuously injects fluid abrasive into the blade, the fluid abrasive can only enter the connecting groove 332 through the corresponding cavity on the blade and finally exit the device along the flow shell 42 and the return pipe 422 to achieve grinding. Once a chamber is finished being polished, the conveying component 3 will be rotated as a whole, which will in turn drive the engine blades to rotate as a whole, thereby rotating the next connecting groove 332 to the position of the flow housing 42, while the other connecting grooves 332 will enter the closed state in sequence, thus achieving segmented precision polishing.

[0026] Two locking sliders 321, perpendicular to the first support slider 331 and the second support slider 341, are slidably mounted on the side of the second rotating plate 32 away from the first rotating plate 31. The locking sliders 321 are slidably mounted on the second rotating plate 32. Fixing brackets 342 are fixedly mounted on both the first support slider 331 and the second support slider 341. Connecting arms 325 rotatably connect the locking sliders 321 and their corresponding fixing brackets 342. A center block 322 is fixedly mounted in the center of the side of the second rotating plate 32 away from the first rotating plate 31. Both sides of block 322 and locking slider 321 are rotatably mounted with threaded rods 323. Locking slider 321 is sleeved on the outside of the corresponding threaded rod 323 through threaded engagement. A secondary bevel gear 324 is fixedly mounted at the end of the threaded rod 323. A main bevel gear 35 is provided on the side of the second rotating plate 32 away from the first rotating plate 31. Both secondary bevel gears 324 mesh with the main bevel gear 35. The main bevel gear 35 is rotatably mounted on the protective housing 41. A servo motor 5 for driving the main bevel gear 35 to rotate is fixedly mounted on the protective housing 41.

[0027] After the conveying component 3 is fully inside the protective housing 41, the two secondary bevel gears 324 mesh with the main bevel gear 35. Then, the servo motor 5 drives the main bevel gear 35 to rotate, which in turn drives the two secondary bevel gears 324 to rotate. The rotation of the secondary bevel gears 324 drives the two threaded rods 323 to rotate. When the threaded rods 323 rotate, they drive the two locking sliders 321 to move away from each other diagonally through the threads. Then, the locking sliders 321 drive the two fixing frames 342 to move closer to each other through the connecting arm 325. As a result, the first covering block 33 and the second covering block 34 are driven to move closer to each other and clamp the blade. It should be noted that only after the first covering block 33 and the second covering block 34 completely cover the blade will the external hydraulic press drive the sealing block 421 to contract synchronously with the flow housing 42 to clamp the first covering block 33 and the second covering block 34. When the first support slider 331 and the second support slider 341 are in their minimum positions, the locking slider 321 cannot move further, and the threaded rod 323 cannot rotate further. At this time, the servo motor 5 can rotate to drive the two secondary bevel gears 324 to revolve, thereby driving the entire conveying component 3 to rotate, which is used to change the grinding position. At this time, the sealing block 421 and the flow housing 42 lock the first covering block 33 and the second covering block 34, so the servo motor 5 can synchronously drive the conveying component 3 to rotate forward and reverse. After processing is completed, the external hydraulic press first drives the sealing block 421 and the flow housing 42 to reset, releasing the first covering block 33 and the second covering block 34. Then, the servo motor 5 rotates in the opposite direction, driving the two locking sliders 321 to move closer to each other. The locking sliders 321 drive the fixing frame 342 to move away from each other through the connecting arm 325, causing the first covering block 33 and the second covering block 34 to slowly open, and the blades are released from the clamp. Because there is a certain friction between the conveying component 3 and the outer shell component 4, and the clamping component 2 also has a certain limiting force on the engine blades, the servo motor 5 can drive the secondary bevel gear 324 to rotate even without the limiting effect of the sealing block 421 and the flow housing 42. At this time, the conveying component 3 exits the protective housing 41 chamber as a whole, completing a single grinding cycle.

[0028] The clamping component 2 includes a movable frame 21, on which a rotating bracket 211 is fixedly mounted. A first pressure cylinder 22 is fixedly mounted in the middle of the rotating bracket 211. A clamping head 23 is rotatably mounted at one end of the first pressure cylinder 22. The clamping head 23 has a clamping port 231. Baffles 232 are rotatably mounted on both sides of the clamping head 23. A connecting frame 233 is fixedly connected between the two baffles 232. A feeding port 222 is opened on the first pressure cylinder 22. An annular sealing sleeve 223 is rotatably mounted on the first pressure cylinder 22 at a position corresponding to the feeding port 222. An opening groove 224 corresponding to the feeding port 222 is opened on the annular sealing sleeve 223. A first piston rod 221 is slidably mounted inside the first pressure cylinder 22. A first piston head is fixedly mounted at one end of the first piston rod 221 inside the first pressure cylinder 22.

[0029] Please see Figure 8 and Figure 9 When using it, first insert the mounting seat of the engine blade into the inside of the clamping port 231. At this time, the pre-set discharge port inside the clamping head 23 is connected to the air hole on the blade mounting seat. It should be noted that the clamping port 231 restricts the mounting seat quite tightly. When installing, you need to use a rubber hammer to tap it until it is fully fitted to ensure that the air passage is sealed without leakage. Then rotate the connecting bracket 233 to move the two baffles 232 to both sides of the mounting seat to prevent the mounting seat from shifting or loosening due to pressure during grinding. Before polishing, rotate the annular sealing sleeve 223 to align the opening groove 224 with the loading port 222. Then, add fluid abrasive to the inside of the first pressure cylinder 22 through the loading port 222 and the opening groove 224. Then, rotate the annular sealing sleeve 223 to make the opening groove 224 and the loading port 222 misaligned and sealed to prevent fluid abrasive leakage. Subsequently, the first piston rod 221 is driven to compress the abrasive inside the first pressure cylinder 22, so that it enters the engine blade through the clamping head 23, thereby performing precision flushing and polishing on the corresponding air film holes of the blade.

[0030] A second pressure cylinder 25 is fixedly installed on the movable frame 21. A second piston rod 251 slides inside the second pressure cylinder 25. A second piston head is fixedly installed at one end of the second piston rod 251 inside the second pressure cylinder 25. A side sealing cavity 252 is integrally formed on the side of the second pressure cylinder 25 near the return pipe 422. A return inner cylinder 423 is fixedly installed on the return pipe 422. The return inner cylinder 423 is slidably locked inside the side sealing cavity 252. A conveying groove 253 connects the second pressure cylinder 25 and the side sealing cavity 252. A hydraulic cylinder 24 is fixedly installed on the movable frame 21. A connecting rod 241 is fixedly installed at the drive end of the hydraulic cylinder 24. The second piston rod 251 and the movable frame 21 are both fixedly installed on the connecting rod 241.

[0031] After the engine blades are installed, the moving frame 21 is moved to push the engine blades into the conveying component 3. Then, the moving frame 21 is pushed to drive the conveying component 3 into the housing component 4. The housing component 4 will then drive the conveying component 3 to lock the engine blades. At this time, grinding is required. The hydraulic cylinder 24 drives the connecting rod 241 to move, and the connecting rod 241 will push the first piston rod 221 to move. Then, the first piston head will push the fluid abrasive inside the first pressure cylinder 22 into the engine blades for grinding. When the connecting rod 241 is driven forward by the hydraulic cylinder 24, it will simultaneously drive the second piston rod 251 forward. The second piston head moves along with it, thereby generating a negative pressure inside the second pressure cylinder 25. The negative pressure inside the second pressure cylinder 25 will actively draw in the fluid abrasive inside the return pipe 422. Thus, during grinding, it can not only inject the abrasive into the blade film aperture with positive pressure at the same time, but also assist the transport of the fluid abrasive through negative pressure, which facilitates the bidirectional circulation of the fluid abrasive in the blade film aperture. When the fluid abrasive inside the first pressure cylinder 22 has completely entered the engine blade, the return pipe 422, and the second pressure cylinder 25, the hydraulic cylinder 24 drives the connecting rod 241 to move in the opposite direction. At this time, the negative pressure inside the first pressure cylinder 22 will reverse the suction of the residual abrasive in the blade film aperture, while the positive pressure inside the second pressure cylinder 25 will press the stored abrasive back into the cavity of the first pressure cylinder 22. This achieves bidirectional grinding of the film aperture, resulting in higher grinding precision and significantly improved grinding efficiency, while effectively avoiding hole diameter deviation caused by abrasive residue.

[0032] After grinding, a lot of abrasive residue often remains inside the engine blades. At this time, there is no need to remove the blades. Simply inject cleaning fluid into the first pressure cylinder 22, and then start the hydraulic cylinder 24 to reciprocate. This will drive the cleaning fluid to clean the engine blades in a reciprocating manner, thoroughly washing away the abrasive residue remaining on the air film pores and blade surface. Under the alternating positive and negative pressure, the cleaning fluid penetrates into the micron-level pores in a pulse-like manner, dissolving and encapsulating the residue. After cleaning is completed, the waste liquid is discharged and the blades are dried. A waste bin 26 is fixedly installed on the movable frame 21, and the waste bin 26 is located below the clamping head 23.

[0033] After grinding and cleaning, the moving frame 21 is first moved to remove the engine blades from the conveying component 3 and the outer casing component 4. Then, the connecting frame 233 is rotated in the opposite direction to drive the baffle 232 to release the mounting seat of the engine blades. The engine blades are then removed from the clamping head 23. The clamping head 23 is then rotated to the vertical direction, and the hydraulic cylinder 24 is driven to move the connecting rod 241 forward. This causes the first piston rod 221 and the first piston head to squeeze the cleaning fluid or fluid abrasive inside the first pressure cylinder 22, causing it to flow out along the preset holes on the clamping head 23 into the waste bin 26 for storage, which facilitates later recycling.

[0034] In a second embodiment of this device, the opening slot 224 and the feeding port 222 can be omitted. Then, a fluid abrasive feed pipe and a discharge pipe are installed on the first pressure cylinder 22. Solenoid valves are installed on both the feed pipe and the discharge pipe, which are automatically opened and closed by the control system according to the grinding stage. The feed pipe is connected to the abrasive storage tank, and the discharge pipe is connected to the waste recycling system. The precise opening and closing of the solenoid valve, in conjunction with the reciprocating stroke of the hydraulic cylinder 24, ensures zero leakage and zero cross-contamination of the abrasive in each stage of feeding, circulation, and recycling. The control system monitors the displacement of the hydraulic cylinder 24, the pressure inside the first pressure cylinder 22, and the status of the solenoid valve in real time, and dynamically adjusts the feed rate and circulation frequency to ensure that the abrasive flow error of each grinding cycle is ≤0.3% and the pressure fluctuation is controlled within ±1kPa, thereby ensuring the high precision requirements of stable air film orifice roundness tolerance of ±0.005mm and surface roughness Ra≤0.2μm.

[0035] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A fluid polishing device for air film pores of engine blades, comprising a support base (1), characterized in that: A conveying component (3) is provided above the support base (1). A clamping component (2) for clamping engine blades is slidably installed on the support base (1). The conveying component (3) includes a first rotating plate (31). A second rotating plate (32) is provided on one side of the first rotating plate (31). A first covering block (33) and a second covering block (34) are provided between the first rotating plate (31) and the second rotating plate (32). The first covering block (33) and the second covering block (34) are spliced ​​to form a cylindrical body. The engine blade is located at the center of the cylindrical body. A clamping component (2) is fixedly installed at one end of the first covering block (33) near the second rotating plate (32). The first support slider (331) and the second covering block (34) are fixedly installed at one end near the second rotating plate (32). The first support slider (331) and the second support slider (341) are both slidably locked on the second rotating plate (32). The first rotating plate (31) is fixedly installed on one side near the second rotating plate (32). The first covering block (33) and the second covering block (34) are slidably connected to the matching slide rod (311) at one end near the first rotating plate (31). The first covering block (33) and the second covering block (34) are both provided with multiple communicating grooves (332).

2. The fluid polishing device for the gas film pores of engine blades according to claim 1, characterized in that: A housing component (4) is fixedly installed above the support base (1). The housing component (4) includes a protective housing (41). The second rotating plate (32) is movably locked in the middle of the protective housing (41). A flow housing (42) is slidably locked inside the protective housing (41). A plurality of sealing blocks (421) are also movably locked inside the protective housing (41). The flow housing (42) and the plurality of sealing blocks (421) are evenly distributed in a circular shape. The flow housing (42) has an opening. A return pipe (422) is fixedly installed outside the protective housing (41). The flow housing (42) is connected to the return pipe (422).

3. The fluid polishing device for the film pores of engine blades according to claim 1 or 2, characterized in that: Multiple evenly distributed third piston rods (424) are fixedly installed on the flow housing (42) and the sealing block (421). Multiple sealed chambers that cooperate with the third piston rods (424) are opened on the protective housing (41). The third piston rods (424) are slidably locked inside the sealed chambers. Multiple pipe supports (43) corresponding to the sealed chambers are fixedly installed on the outside of the protective housing (41). A main pipe (431) is fixedly installed on each of the multiple pipe supports (43). The multiple main pipes (431) are connected to the output end of the external hydraulic press after being combined by the pipes.

4. The fluid polishing device for air film pores of engine blades according to claim 1, characterized in that: Two locking sliders (321) are slidably mounted on the side of the second rotating plate (32) away from the first rotating plate (31), and are perpendicular to the first support slider (331) and the second support slider (341). The locking sliders (321) are slidably mounted on the second rotating plate (32). Fixing frames (342) are fixedly mounted on both the first support slider (331) and the second support slider (341). Connecting arms (325) are rotatably connected between the locking sliders (321) and the corresponding fixing frames (342). A center block (322) is fixedly mounted in the middle of the side of the second rotating plate (32) away from the first rotating plate (31). (322) Threaded rods (323) are rotatably installed on both sides corresponding to the locking slider (321). The locking slider (321) is sleeved on the outside of the corresponding threaded rod (323) through threaded engagement. A secondary bevel gear (324) is fixedly installed at the end of the threaded rod (323). A main bevel gear (35) is provided on the side of the second rotating plate (32) away from the first rotating plate (31). Both secondary bevel gears (324) mesh with the main bevel gear (35). The main bevel gear (35) is rotatably installed on the protective housing (41). A servo motor (5) for driving the main bevel gear (35) to rotate is fixedly installed on the protective housing (41).

5. The fluid polishing device for the gas film pores of engine blades according to claim 2, characterized in that: The protective housing (41) has multiple ring-shaped slots at one end near the servo motor (5). A limit spring (44) is fixedly installed inside the slot. A limit ball (441) is fixedly installed at the end of the limit spring (44). An annular groove that cooperates with the limit ball (441) is opened on the second rotating plate (32).

6. The fluid polishing device for the gas film pores of engine blades according to claim 1, characterized in that: The clamping component (2) includes a movable frame (21), on which a rotating bracket (211) is fixedly installed. A first pressure cylinder (22) is fixedly installed in the middle of the rotating bracket (211). A clamping head (23) is rotatably installed at one end of the first pressure cylinder (22). The clamping head (23) has a clamping opening (231). Baffles (232) are rotatably installed on both sides of the clamping head (23). A connecting frame (233) is fixedly connected between the two baffles (232).

7. The fluid polishing device for the gas film pores of engine blades according to claim 6, characterized in that: The first pressure cylinder (22) has a feeding port (222). A ring-shaped sealing sleeve (223) is rotatably installed on the first pressure cylinder (22) at the position corresponding to the feeding port (222). The ring-shaped sealing sleeve (223) has an opening groove (224) corresponding to the feeding port (222). A first piston rod (221) is slidably installed inside the first pressure cylinder (22). A first piston head is fixedly installed at one end of the first piston rod (221) inside the first pressure cylinder (22).

8. The fluid polishing device for the gas film pores of engine blades according to claim 6, characterized in that: A second pressure cylinder (25) is fixedly installed on the movable frame (21). A second piston rod (251) slides inside the second pressure cylinder (25). A second piston head is fixedly installed at one end of the second piston rod (251) inside the second pressure cylinder (25). A side sealing cavity (252) is integrally formed on the side of the second pressure cylinder (25) near the return pipe (422). A return inner cylinder (423) is fixedly installed on the return pipe (422). The return inner cylinder (423) is slidably locked inside the side sealing cavity (252). A conveying groove (253) connects the second pressure cylinder (25) and the side sealing cavity (252).

9. The fluid polishing device for air film pores of engine blades according to claim 6, characterized in that: A hydraulic cylinder (24) is fixedly installed on the movable frame (21). A connecting rod (241) is fixedly installed on the driving end of the hydraulic cylinder (24). The second piston rod (251) and the movable frame (21) are both fixedly installed on the connecting rod (241). A waste bin (26) is fixedly installed on the movable frame (21). The waste bin (26) is located below the clamping head (23).

10. The fluid polishing device for the gas film pores of engine blades according to claim 2, characterized in that: A pressure switch (45) is fixedly installed inside the protective housing (41), and a pointer (312) is fixedly installed on the first rotating plate (31). The protective housing (41) has multiple position slots (411) corresponding to the connecting groove (332) at one end near the first rotating plate (31).

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