Plasma spraying system applied to turbine blade

Abstract

The plasma spraying system applied to the turbine blade is characterized in that the plasma spraying system comprises a spraying room, a spraying device and a rotating disc set, the spraying room comprises a closed working area, and the closed working area is divided into an operation area and a preparation area through a partition wall; the spraying device comprises a manipulator and a plasma spray gun; the rotating disc set comprises a main rotating disc and an auxiliary rotating disc set. The rotating axis of the main rotating disc is located at the separation position of the operation area and the preparation area. An auxiliary rotating disc group is mounted on the main rotating disc and comprises at least two self-rotating discs, and each self-rotating disc is configured to rotate around the axis of the self-rotating disc; an annular sealing check ring is arranged on the edge of the main turntable; an arc-shaped sealing groove is formed in the partition wall; the plasma spray gun is in an ignition state in the process that the main rotating disc drives the self-rotating disc to switch the stations between the operation area and the preparation area. According to the embodiment, the plasma spraying operation efficiency can be improved, the service life of the electrode of the plasma spray gun is prolonged, and the operation safety is enhanced.

Description

Technical Field

[0001] This disclosure relates to the field of gas turbine technology, and more specifically to a plasma spraying system applied to turbine blades. Background Technology

[0002] Plasma spraying is a surface treatment technology used to prepare protective or functional coatings on workpiece surfaces. In plasma spraying operations on precision components such as turbine blades, the traditional method typically involves sequential operations within a single, enclosed spray booth. Currently, the common approach is as follows: First, the operator installs and secures the workpiece to be sprayed and then leaves the work area. The plasma spray gun is then activated for spraying. After the spraying of a single workpiece is completed, the plasma spray gun is turned off. Once the work area has fully cooled and dust has settled, the operator enters or opens the work area, removes the sprayed workpiece, and installs a new workpiece to be sprayed. The spray gun is then reignited for the next round of operations.

[0003] However, in practice, it has been found that the following technical problems are frequently encountered when using traditional plasma spraying methods: Frequent ignition and shutdown significantly shorten the lifespan of plasma spray gun electrodes, leading to frequent shutdowns for electrode replacement and increased costs. Furthermore, a significant amount of time is spent on workpiece replacement, cooling, and ventilation of the work area during each of the two workpiece coating tasks, resulting in low equipment utilization. During workpiece replacement, personnel still need to enter or come into close contact with the work area, and residual heat radiation and dust can cause burns to operators.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background of the present disclosure concept, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The summary portion of this disclosure is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description portion. This summary portion is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] Some embodiments of this disclosure propose a plasma spraying system for turbine blades to address the technical problems mentioned in the background section above.

[0007] In a first aspect, some embodiments of this disclosure provide a plasma spraying system for turbine blades, characterized in that the plasma spraying system includes a spray booth, a spraying device, and a turntable assembly. The spray booth includes a sealed working area, which is divided into a working area and a preparation area by a partition wall. The working area is the area for spraying the turbine blades, and the preparation area is the area for switching between placed turbine blades. The spraying device includes a robotic arm and a plasma spray gun. The robotic arm is mounted on the ground in front of the working area, and its end is connected to the plasma spray gun. The turntable assembly includes a main turntable and an auxiliary turntable assembly. The main turntable is fixed to the partition wall, and the rotation axis of the main turntable is... Located at the separation point between the aforementioned work area and the aforementioned preparation area; the aforementioned main turntable is equipped with the aforementioned auxiliary turntable assembly, the aforementioned auxiliary turntable assembly including at least two rotating discs, each rotating disc being configured to rotate around its included axis; the edge of the aforementioned main turntable is provided with an annular sealing ring, the aforementioned partition wall is provided with an arc-shaped sealing groove, the aforementioned arc-shaped sealing groove and the aforementioned annular sealing ring form a dynamic sealing structure, the aforementioned main turntable and the aforementioned auxiliary turntable assembly can pass through the aforementioned arc-shaped sealing groove when rotating, the aforementioned dynamic sealing structure is used to block dust; the aforementioned plasma spray gun is in an ignition state during the process of the aforementioned main turntable driving the aforementioned rotating discs to switch positions between the aforementioned work area and the aforementioned preparation area, the duration of a single position switch of the aforementioned main turntable is less than or equal to a preset duration.

[0008] Optionally, a protective door is installed on the outer wall of the preparation area, and a test piece fixing structure is provided in the work area.

[0009] Optionally, the horizontal distance between the above-mentioned test piece fixing structure and the center of the above-mentioned work area is 200~300mm, and the distance between the above-mentioned test piece fixing structure and the inner wall of the above-mentioned work area is greater than or equal to 150mm. The above-mentioned test piece fixing structure is used to fix the sprayed test piece.

[0010] Optionally, the plasma spraying system further includes a linkage control structure, which is used to control the closing of the protective door when the main turntable rotates.

[0011] Optionally, the rotation of the aforementioned rotary tables is driven by a drive motor, and each of the rotary tables in the aforementioned auxiliary rotary table group is equipped with a quick-change workpiece fixture, which adopts a three-point positioning structure.

[0012] Optionally, the top of the spray booth is equipped with an exhaust system, which is configured to operate continuously throughout the process.

[0013] Optionally, the inner wall of the spray booth is covered with a heat-insulating and reflective coating, and a high-temperature resistant exhaust pipe is installed on the top of the spray booth. The heat-insulating and reflective coating is a composite gradient coating, which includes a base layer, a middle layer, and an outer layer. The base layer is a high-temperature resistant ceramic base layer bonded to the inner wall of the spray booth. The middle layer is an aluminum coating. The outer layer is a coating made of an anti-condensation material. The total thickness of the heat-insulating and reflective coating is 0.5~1.2mm. The high-temperature resistant exhaust pipe is a stainless steel water-cooled jacketed pipe. The inner wall of the high-temperature resistant exhaust pipe is lined with a wear-resistant ceramic lining. The jacket of the stainless steel water-cooled jacketed pipe is provided with at least five annular turbulence-inducing ribs. The outer edges of the turbulence-inducing ribs are in close contact with the inner wall of the stainless steel water-cooled jacketed pipe to form a turbulence chamber. The wear-resistant ceramic lining is chromium oxide-based ceramic. The heat-insulating and reflective coating is prepared using a supersonic flame spraying process.

[0014] Optionally, the end effector of the aforementioned robotic arm is rigidly connected to a stabilizing chamber; the stabilizing chamber is horn-shaped; the stabilizing chamber is divided into a protection zone and a suction zone by a partition, the protection zone being located in front of the partition and the suction zone being located behind the partition; an annular air collection chamber is welded to the wall of the stabilizing chamber; a micro-jet orifice array with a predetermined number of rings is provided on the side wall of the protection zone near the partition, the micro-jet orifice array radially penetrating the wall of the stabilizing chamber; the micro-jet orifice array is connected to the annular air collection chamber, the annular air collection chamber being connected to a compressed air source through a pipeline; the suction zone is flexibly connected to an exhaust device through a corrugated pipe; a first predetermined number of guide vanes are installed in the working area, all of which are radially arranged and are airfoil-shaped; a flow-rectifying grid is provided on the side of the partition wall near the edge of the main turntable, the blade direction of the flow-rectifying grid is at a predetermined angle to the tangential direction of the main turntable.

[0015] Optionally, an end face gear is installed at the bottom of the rotation shaft of the aforementioned rotary disk, and the tooth profile of the end face gear is a bidirectional involute tooth profile; the connection between the main rotary disk and the loading / unloading stations in the aforementioned working area and the aforementioned preparation area is respectively provided with end face gear meshing seats; each of the aforementioned end face gear meshing seats includes a rigid base and a floating pressure plate, and the aforementioned floating pressure plate is connected to the aforementioned rigid base through an elastic element to form a floating support structure; the meshing surface of the aforementioned floating pressure plate is provided with a toothed structure, and the aforementioned toothed structure meshes with the toothed structure of the aforementioned end face gear; the rotation shaft of the aforementioned rotary disk is installed in the mounting hole of the aforementioned main rotary disk through a linear bearing, so that the aforementioned rotary disk can float up and down; the aforementioned working area is provided with a first cylinder, and the aforementioned preparation area is provided with a second cylinder, and the aforementioned linkage control structure is configured to: in response to detecting a rotation signal of the rotary disk in the aforementioned working area, control the piston rod of the aforementioned first cylinder to extend; and in response to detecting a rotation signal of the rotary disk in the aforementioned preparation area, control the piston rod of the aforementioned second cylinder to extend.

[0016] Optionally, the outer shell of the aforementioned stable chamber is welded with a predetermined number of heat dissipation fins; each of the aforementioned heat dissipation fins is internally connected to a cooling water pipe, which is connected in parallel to the main cooling water circuit of the aforementioned stable chamber; a measuring bracket is installed on the aforementioned partition wall, the installation position of the measuring bracket being directly opposite the opening of the aforementioned stable chamber; the measuring bracket is equipped with at least three laser rangefinders, the measuring beams of the aforementioned laser rangefinders being focused on the edge of the opening of the aforementioned stable chamber; a second predetermined number of annular heat sinks are fitted onto the rear cavity of the aforementioned plasma spray gun, and a thermal pad is sandwiched between each adjacent heat sink; the thermal pad is encapsulated with... The heat pipe extends to a cooling fan at its end; the measuring bracket is also equipped with a water-cooled base, on which an infrared temperature sensor is mounted; a compressed air nozzle is connected to the rear of the water-cooled base, and the outlet of the compressed air nozzle is directly opposite the observation window of the infrared temperature sensor; the stable cabin is mounted on the end of the robotic arm via a micro-motion platform, which includes three independently extendable adjusting screws, each driven by a servo motor. The adjusting screws are configured to automatically adjust the spatial angle and position of the horn-shaped stable cabin based on the feedback signal from the laser rangefinder sensor.

[0017] In a second aspect, some embodiments of this disclosure provide an electronic device, including: one or more processors; and a storage device having one or more programs stored thereon, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method described in any of the implementations of the first aspect above.

[0018] The various embodiments disclosed above have the following beneficial effects: The plasma spraying system applied to turbine blades according to some embodiments of this disclosure can improve spraying efficiency, extend the electrode life of the plasma spray gun, and enhance operational safety. The reasons for the low spraying efficiency, low electrode life of the plasma spray gun, and low operational safety in the prior art are as follows: frequent ignition and shutdown significantly shorten the electrode life of the plasma spray gun, leading to frequent shutdowns for electrode replacement and increased costs; in every two workpieces sprayed, a significant amount of time is spent between workpiece replacement, cooling, and ventilation of the work area, resulting in low equipment utilization; during workpiece replacement, personnel still need to enter or be in close contact with the work area, and residual heat radiation and dust can cause burns to operators. Based on this, some embodiments of the plasma spraying system for turbine blades disclosed herein are characterized in that the plasma spraying system includes a spray booth, a spraying device, and a turntable assembly. The spray booth includes a sealed working area, which is divided into a work area and a preparation area by a partition wall. The work area is the area for spraying the turbine blades, and the preparation area is the area for switching between placed turbine blades. The spraying device includes a robotic arm and a plasma spray gun. The robotic arm is mounted on the ground of the work area, and its end is connected to the plasma spray gun. The turntable assembly includes a main turntable and an auxiliary turntable assembly. The main turntable is fixed to the partition wall, and its rotation axis is located on the upper... The separation between the work area and the preparation area is as follows: the main turntable is equipped with the auxiliary turntable assembly, which includes at least two rotating discs, each of which is configured to rotate around its included axis; the edge of the main turntable is provided with an annular sealing ring, and the partition wall is provided with an arc-shaped sealing groove, which, together with the annular sealing ring, forms a dynamic sealing structure. The main turntable and the rotating disc assembly can pass through the arc-shaped sealing groove when rotating, and the dynamic sealing structure is used to block dust; the plasma spray gun is in an ignition state during the process of the main turntable driving the rotating discs to switch positions between the work area and the preparation area, and the duration of a single position switch of the main turntable is less than or equal to a preset duration. Because the spray booth is divided into a work area and a preparation area, and the rotation axis of the main turntable is located at the partition wall between the work area and the preparation area, the auxiliary turntable of the main turntable can switch positions between the work area and the preparation area. Thus, while the workpiece is being sprayed in the work area, another workpiece can be loaded, unloaded and prepared in the preparation area, realizing parallel operation of spraying and workpiece change. This can reduce the waiting time required for spraying operations and improve the utilization rate of spraying operations.Furthermore, because the plasma spray gun remains ignited during the station switching process driven by the main turntable, and the single switching time of the main turntable is less than the preset value, the plasma spray gun can maintain continuous and stable operation for a long time, reducing electrode wear caused by thermal cycling, thereby extending the electrode life of the plasma spray gun. Also, because the dynamic sealing structure of the plasma spray gun and turntable assembly connected to the end effector of the robotic arm, as well as the exhaust device on the top of the spray booth, effectively isolates the sprayed powder from high-temperature radiation in a closed working area, the risk of operators coming into contact with high-temperature workpieces, inhaling dust, or suffering heat radiation burns can be reduced, thus enhancing operational safety. Attached Figure Description

[0019] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and elements are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the structure of a plasma spraying system applied to turbine blades according to the present disclosure; Figure 2 This is a schematic diagram of the structure of an electronic device suitable for implementing some embodiments of the present disclosure; Figure 3 According to the disclosed internal test image of the plasma spray gun used in the plasma spraying system for turbine blades; Figure 4 An internal test image of the work area in the spray booth of the plasma spraying system applied to turbine blades, according to this disclosure; Figure 5 An internal test image of the preparation area in the spray booth of the plasma spraying system for turbine blades, as disclosed herein. Detailed Implementation

[0021] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0022] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0023] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0024] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0025] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0026] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the structure of a plasma spraying system applied to turbine blades according to the present disclosure. Figure 1 It may include a partition wall 1, a plasma spray gun 2, an auxiliary turntable 3, a robotic arm 4, a main turntable 5, and a spray booth 6.

[0028] Figure 2 This is a schematic diagram of the structure of an electronic device suitable for implementing some embodiments of the present disclosure.

[0029] Figure 3 Based on the internal test images of the plasma spray gun used in the plasma spraying system for turbine blades disclosed herein, the feasibility of the plasma spray gun in practical applications can be characterized.

[0030] Figure 4 Based on the internal test diagram of the work area included in the spray booth of the plasma spraying system for turbine blades disclosed herein, the feasibility of spraying turbine blades in the work area can be characterized.

[0031] Figure 5 Based on the internal test diagram of the preparation area in the spray booth of the plasma spraying system for turbine blades disclosed herein, the feasibility of switching turbine blades in the preparation area can be characterized.

[0032] In some embodiments, the plasma spraying system described above may include a spray booth 6, a spraying device, and a turntable assembly. The spray booth 6 provides a sealed, isolated working environment to accommodate the spraying by the plasma spray gun 2 and ensure user safety. The spraying device is used to perform plasma spraying on turbine blades. The turntable assembly is used to carry and transport the turbine blades to be sprayed.

[0033] In some embodiments, the spray booth 6 may include a sealed working area. This sealed working area can be divided into a work area and a preparation area by a partition wall 1. The work area is for spraying the turbine blades. The preparation area is for switching the placed turbine blades. The sealed working area can be constructed by welding steel plates to achieve a sealed environment. The partition wall 1 is connected to the body of the spray booth 6 by continuous full welding to ensure good airtightness between the work area and the preparation area. The partition wall 1 can be made of steel plates with reinforcing ribs. The sealed working area can be rectangular in shape. Users can replace the sprayed turbine blades with unsprayed turbine blades in the preparation area.

[0034] In some embodiments, the spraying device may include a robotic arm 4 and a plasma spray gun 2. The robotic arm 4 may be mounted on the ground in front of the work area. The end of the robotic arm 4 may be connected to the plasma spray gun 2. The robotic arm 4 may be a six-axis articulated robot. The plasma spray gun 2 may be an atmospheric plasma rotary spray gun. The head end of the robotic arm 4 may be bolted to a base, which may be cast and fixed to the ground in front of the work area. The end of the robotic arm 4 may be connected to the plasma spray gun 2 via a quick-connect coupling.

[0035] In some embodiments, the turntable assembly may include a main turntable 5 and an auxiliary turntable assembly. The main turntable 5 may be fixed to the partition wall 1. The rotation axis of the main turntable 5 may be located at the separation point between the work area and the preparation area. The main turntable 5 may be a CNC rotary table. The main turntable 5 may be fixed to the partition wall 1 via a mounting bracket. The separation point may represent the center plane of the partition wall 1. The center plane may represent a plane parallel to two opposing surfaces of the partition wall 1 and located at the midpoint of the thickness of the partition wall 1.

[0036] In some embodiments, the auxiliary turntable assembly may be mounted on the main turntable 5. The auxiliary turntable assembly may include at least two rotating discs. Each rotating disc is configured to rotate about its included axis. The two rotating discs are symmetrically arranged on the main turntable 5. Both rotating discs can be mounted on the main turntable 5 via a rotation shaft at their bottom. Specifically, the rotation shaft can be mounted in the mounting hole of the main turntable 5 via a linear bearing. The rotating disc can be a single-axis positioner.

[0037] In some embodiments, the edge of the main turntable 5 may be provided with an annular sealing ring. The partition wall 1 may be provided with an arc-shaped sealing groove. The arc-shaped sealing groove and the annular sealing ring can form a dynamic sealing structure. The main turntable 5 and the auxiliary turntable assembly can pass through the arc-shaped sealing groove during rotation. The dynamic sealing structure can be used to block dust. The annular sealing ring can be a ring-shaped sealing ring. The inner diameter of the sealing ring can be 80 mm, the outer diameter can be 90 mm, and the thickness can be 5 mm. The width of the arc-shaped sealing groove can be 6 mm, and the depth can be 4 mm. The annular sealing ring can be fixed to the edge of the main turntable 5 by welding. The arc-shaped sealing groove can be formed by milling during the prefabrication of the partition wall 1. The shape of the annular sealing ring is adapted to the shape of the arc-shaped sealing groove. The width of the arc-shaped sealing groove can be greater than the target thickness. The target thickness can represent the sum of the thickness of the annular sealing ring and the thickness of the auxiliary turntable assembly, so that the main turntable 5 and the auxiliary turntable assembly can pass through the arc-shaped sealing groove when rotating.

[0038] In some embodiments, the plasma spray gun 2 can be in an ignition state during the process of the main turntable 5 driving the self-rotating disk to switch positions between the working area and the preparation area. The duration of a single position switch by the main turntable 5 is less than or equal to a preset duration. The preset duration can be 3 seconds. This preset duration can reduce electrode wear caused by frequent start-stop of the plasma spray gun 2, thereby extending the service life of the plasma spray gun 2 and shortening the production cycle of the plasma spraying system, thus improving the equipment utilization rate and spraying production efficiency of the plasma spraying system.

[0039] Optionally, a protective door can be installed on the outer wall of the preparation area. The work area can be equipped with a test piece fixing structure. The protective door can be an electrically operated sliding door. The outer wall of the preparation area can be the side of the spray booth 6 facing the plasma spray gun 2 and away from it. The protective door can be welded to the outer wall of the preparation area. The protective door is used to isolate personnel in the preparation area from the work area. The test piece fixing structure can be an adjustable claw-type clamp. The test piece fixing structure can be used to fix the test piece. The aforementioned test piece can be a pre-prepared metal sheet of the same or similar material as the turbine blade substrate to be coated. Before coating the turbine blade, the test piece is used to test whether the coating effect of the plasma spray gun 2 meets the requirements. This reduces waste of the turbine blade. If the coating effect of the plasma spray gun 2 on the turbine blade meets the requirements, then the plasma spray gun 2 will proceed with the coating. The requirements for the coating effect are not specifically limited and can be adjusted according to actual needs. The test piece fixing structure can be installed in the work area via a detachable mounting arm. Specifically, one end of the mounting arm can be fixed to the side wall of the work area via a flange, and the other end of the mounting arm can be connected to the test piece fixing structure. The outer wall of the preparation area can represent the wall surface of the preparation area building.

[0040] Optionally, the horizontal distance between the aforementioned specimen fixing structure and the center of the aforementioned working area can be 200~300mm. The distance between the aforementioned specimen fixing structure and the inner wall of the aforementioned working area can be greater than or equal to 150mm. The specimen fixing structure can be located on the aforementioned main turntable 5. The aforementioned turbine blades can be mounted and fixed on the aforementioned auxiliary turntable 3. The aforementioned horizontal distance and the turbine blades fixed on the aforementioned auxiliary turntable 3 ensure that both the specimen and the turbine blades are within the main process area of ​​the plasma jet, thereby reflecting the typical process conditions of the aforementioned main process area. This allows the test results of the obtained specimens to be used to evaluate the stability of the process. The aforementioned main process area can be a cylindrical space formed with the rotation axis of the aforementioned main turntable 5 as the center and the radius of the aforementioned main turntable 5 as the boundary. The radius of the aforementioned main turntable 5 can be 1400mm. The radius of the auxiliary turntable 3 in the aforementioned auxiliary turntable group is not limited; the diameter of the aforementioned auxiliary turntable 3 only needs to be smaller than the radius of the aforementioned main turntable 5. The aforementioned typical process conditions represent the deposition environment formed by setting the plasma power, main gas flow rate, and powder delivery rate within the main process area of ​​the plasma spraying system. Maintaining a distance of at least 150 mm between the specimen fixing structure and the inner wall of the work area reduces the impact of airflow disturbance, dust deposition, and temperature field inhomogeneity on the specimen coating caused by the inner wall of the spray booth 6. The inner wall of the work area can characterize the sidewall of the work area.

[0041] Optionally, the plasma spraying system may further include a linkage control structure. This linkage control structure can be used to control the closing of the protective door when the main turntable 5 rotates. The linkage control structure may include a safety door switch installed on the protective door and a programmable logic controller (PLC). The safety door switch may be a non-contact coded safety door switch. The PLC may be communicatively connected to the safety door switch. The PLC and the safety door switch may be connected via hardwiring. In operation, the safety door switch detects the closing status of the protective door and outputs a safety coded signal to the PLC. The PLC is configured to allow the main turntable 5 to start rotating when it continuously receives a valid safety coded signal indicating that the safety door is safely closed; and to stop the rotation of the main turntable 5 when the received valid safety coded signal is interrupted or invalid. The safety coded signal may be a sequence of current pulses with an amplitude of ±12mA. The aforementioned effective security coding signal can be a signal whose amplitude of the aforementioned current pulse sequence is within the range of ±10mA to ±14mA, whose pulse width is less than 1 microsecond, and whose device unique code is consistent with the preset code and whose cyclic redundancy check code calculation result is correct after decoding.

[0042] Optionally, the rotation of the aforementioned rotary tables can all be driven by a drive motor. Each rotary table in the aforementioned auxiliary rotary table group can be equipped with a quick-change workpiece fixture. The aforementioned quick-change workpiece fixture can all adopt a three-point positioning structure. Specifically, the aforementioned quick-change workpiece fixture can include a quick-change interface for quick connection with the aforementioned rotary table, and a clamp for clamping the turbine blades. The aforementioned clamp uses a three-point positioning method to fix the aforementioned turbine blades, thereby achieving rapid and stable clamping of the aforementioned turbine blades. Here, the reference points of the aforementioned three-point positioning structure are not specifically limited and can be adjusted according to actual conditions; it is sufficient to fix the turbine blades through three points.

[0043] Optionally, an exhaust system can be installed on the top of the spray booth 6. This exhaust system is configured for continuous operation. The exhaust system can be a centrifugal fan. First, an installation opening can be pre-drilled in the top of the spray booth 6, and a rigid mounting base can be welded to it. Then, the bottom of the exhaust system can be connected to the mounting base via a spring shock absorber to absorb vibrations generated during operation. The exhaust system is used to promptly remove dust and exhaust gases generated by the plasma spraying system during spraying operations and to maintain necessary ventilation and negative pressure in the work area.

[0044] Optionally, the inner wall of the spray booth 6 can be covered with a heat-insulating and reflective coating. A high-temperature resistant exhaust duct can be installed on the top of the spray booth 6. The heat-insulating and reflective coating can be a composite gradient coating. The composite gradient coating can include a base layer, a middle layer, and an outer layer. The base layer can be a high-temperature resistant ceramic base layer bonded to the inner wall of the spray booth 6. The middle layer can be an aluminum coating. The outer layer can be a coating made of an anti-condensation material. The total thickness of the heat-insulating and reflective coating can be 0.5~1.2mm. The high-temperature resistant exhaust duct can be a stainless steel water-cooled jacketed duct. The inner wall of the high-temperature resistant exhaust duct can be lined with a wear-resistant ceramic lining. The jacket of the stainless steel water-cooled jacketed duct can have at least five annular turbulence-inducing ribs. The outer edges of the turbulence-inducing ribs can be in close contact with the inner wall of the stainless steel water-cooled jacketed duct to form a turbulent flow chamber. The wear-resistant ceramic lining can be chromium oxide-based ceramic. The heat-insulating and reflective coating can be prepared using a supersonic flame spraying process. The aforementioned anti-condensation material can be carbon resin. The air inlet of the aforementioned high-temperature exhaust pipe can be fixed to the exhaust port pre-reserved on the top of the spray booth 6 via a flange connection. The aforementioned high-temperature exhaust pipe can be fixed to the roof of the spray booth 6 via a bracket or hanger. The aforementioned turbulence ribs can be installed within the jacket of the stainless steel water-cooled jacketed pipe via continuous welds. The total thickness of the aforementioned heat-insulating reflective coating can provide sufficient thermal resistance. The aforementioned heat-insulating reflective coating can be used to reflect the radiant heat generated during spraying and reduce the temperature of the inner wall of the spray booth 6. The aforementioned high-temperature exhaust pipe can withstand and continuously discharge high-temperature exhaust gas. The wear-resistant ceramic lining on the inner wall of the aforementioned high-temperature exhaust pipe can reduce the scouring, wear, and corrosion caused by solid particles generated during the plasma spray gun 2 spraying. The aforementioned turbulence chamber can increase the heat exchange rate between the cooling water of the aforementioned stainless steel water-cooled jacketed pipe and the inner wall of the aforementioned stainless steel water-cooled jacketed pipe by forcibly generating turbulence, ensuring the stable operation of the aforementioned plasma spraying system. The above-mentioned heat-insulating and reflective coating is prepared by supersonic flame spraying process (supersonic flame spraying technology), which can enable the heat-insulating and reflective coating to maintain its integrity in a long-term and high-temperature environment, and reduce the possibility of the heat-insulating and reflective coating peeling and failing easily.

[0045] In addressing the aforementioned technical problems in the application scenario—specifically, in a large-scale, continuous coating remanufacturing production line for heavy turbine blades—the following technical problem often arises: Air disturbances (such as lateral shear flow) generated during the high-speed rotation of the main rotary table and station switching continuously act on the plasma jet, causing geometrical deviations and thermodynamic fluctuations. This results in excessive coating thickness variations between the leading and trailing edges of the blades, discrete coating bonding strength, and powder contamination of adjacent cleaning stations due to airflow. Based on the following requirements for this application scenario: adapting to and overcoming persistent, periodically recurring complex airflow interference, and ensuring stable coating quality without sacrificing production cycle time and continuity, we have decided to adopt the following solution: Optionally, the end effector of the aforementioned robotic arm can be rigidly connected to a stabilizing chamber. The stabilizing chamber can be horn-shaped. The stabilizing chamber is divided into a protection zone and a suction zone by a partition. The protection zone can be located in front of the partition. The suction zone can be located behind the partition. An annular air collection chamber can be welded onto the wall of the stabilizing chamber. A predetermined number of micro-jet orifice arrays can be provided on the side wall of the protection zone near the partition. The micro-jet orifice array can radially penetrate the wall of the stabilizing chamber. The micro-jet orifice array communicates with the annular air collection chamber, which can be connected to a compressed air source through a pipeline. The suction zone can be flexibly connected to the exhaust device through a bellows. A first predetermined number of guide vanes can be installed in the working area. The first predetermined number of guide vanes are all radially arranged. The shape of the guide vanes in the first predetermined number of guide vanes can all be airfoil-shaped. A flow-rectifying grid can be provided on the side of the partition wall near the edge of the rotating disk. The blade direction of the aforementioned rectifying grid can be at a preset angle to the tangent direction of the aforementioned main turntable. The aforementioned annular gas collection chamber can represent an annular cavity disposed on the wall of the aforementioned stabilizer. The front of the aforementioned partition faces the aforementioned working area. The aforementioned stabilizer can be bolted to the flange at the end of the aforementioned robotic arm via its rear flange. The aforementioned stabilizer can be used to collect and guide the high-temperature exhaust gas and splashed particles generated during plasma spraying. The aforementioned micro-jet orifice array can be formed by laser drilling or electrical discharge machining. The aforementioned micro-jet orifice array can be a preset number of micro-jet orifices arranged in a circumferentially interlaced spiral pattern. The preset number of turns can be 3 to 5 turns. The preset number can be 60. All of the aforementioned micro-jet orifices can be orifices with a large inlet and a small outlet. The aforementioned circumferentially interlaced spiral arrangement can reduce interference between adjacent jets. The aforementioned micro-jet orifices can be conical structures with a taper of (1:5) to (1:10) and an aperture of 0.3 to 0.8 mm. This conical structure accelerates compressed air as it passes through the orifice, creating a high-speed jet and enhancing the air curtain's resistance to the shear force of the lateral airflow. The micro-jet orifice array and the annular air-collecting chamber allow compressed air to enter the annular air-collecting chamber and then be ejected uniformly and stably through the micro-jet orifice array, forming an air curtain around the jet from the plasma spray gun. This prevents the lateral airflow generated by the rotation of the main turntable from impacting the jet. The aforementioned piping is a polyurethane flexible hose with a filter. The corrugated pipe allows the piping to extend, contract, and bend without leakage as the stabilizing chamber moves with the robotic arm. The compressed air source can be a device capable of providing a continuous, stable, and clean supply of compressed gas. For example, the compressed air source can be compressed air supplied by a pre-installed compressed air network within the factory building housing the plasma spray booth system. The guide plate can be bolted to the side wall of the work area. The aforementioned baffle plate can be used to guide and stabilize the airflow field within the aforementioned spray booth 6.The aforementioned first preset quantity can be 6. The aforementioned rectifier grille type can be a grille wing. The aforementioned rectifier grille can be used to cut and straighten the airflow generated when the aforementioned main turntable rotates at high speed. The aforementioned preset angle can be 45°. The aforementioned first preset quantity of guide plates can all be fixed to the aforementioned working area by bolts. The mounting axis of the aforementioned guide plates points to the rotation center of the aforementioned main turntable to guide the airflow to flow centripetally and stably. The aforementioned rectifier grille can be welded to the aforementioned partition wall.

[0046] The above-described technical solution, as an inventive point of this disclosure, solves technical problem two: the coating thickness at the leading and trailing edges of the blade is out of tolerance, the coating bonding strength is discrete, and the powder is carried away by the airflow, contaminating the cleaning work of adjacent stations. The reasons for this are as follows: air disturbances (such as lateral shear flow) generated during the high-speed rotation of the main turntable when switching stations continuously act on the plasma jet, causing geometrical shifts and thermodynamic fluctuations in the plasma jet, which in turn leads to the coating thickness at the leading and trailing edges of the blade being out of tolerance, the coating bonding strength being discrete, and the powder being carried away by the airflow, contaminating the cleaning work of adjacent stations. To achieve this effect, the compressed gas in the plasma spraying system disclosed herein can be uniformly ejected from the micro-jet orifice array through the annular gas collection chamber, forming a stable air curtain around the plasma jet emitted by the plasma spray gun. This isolates the surrounding hot air containing dust from back-seeping, thereby protecting the area of ​​the plasma jet from interference. Furthermore, because the aforementioned suction zone can utilize the continuous negative pressure generated by the bellows, it can actively and directionally remove waste heat and dust generated during the spraying process, reducing the disorderly diffusion of dust. Additionally, because the aforementioned work area is equipped with six radially arranged airfoil guides, it can guide the airflow within the spray booth to form a stable flow field converging from the periphery to the center. Moreover, the pre-angled flow straightening grille can smooth out the lateral turbulent airflow generated by the turbine blades' rotation, thereby reducing the continuous effect of air disturbances generated during station switching on the plasma jet, which could lead to excessive coating thickness at the leading and trailing edges of the blades.

[0047] In addressing the aforementioned technical problems in the application scenario—specifically, the continuous production and delivery cycle of hot channel blades for heavy-duty gas turbines—often presents the following technical problem: Under the extreme production cycle driven by delivery cycle pressure, the main turntable needs to start, stop, and rotate at a higher frequency and in a shorter time. The resulting transient centrifugal force and start-stop impact vibration are transmitted to the turntable and the quick-change tooling, causing elastic sliding or wobbling of the blade relative to the tooling positioning surface by several micrometers to tens of micrometers. This results in localized excessively thin coatings or missed areas, as well as inconsistent coating thickness among different blades in the same batch. Based on the following requirements for this application scenario: adapting to positioning accuracy under high-frequency start-stop rotation, meeting the zero-discretion requirements of key coating indicators in large-volume continuous operations, and ensuring absolute stability of the entire batch's quality output within the delivery cycle, we have decided to adopt the following solution: Optionally, an end-face gear plate is mounted at the bottom of the rotating shaft of the aforementioned rotary disk, and the tooth profile of the end-face gear plate is a bidirectional involute tooth profile; end-face gear plate meshing seats are respectively provided at the connection points between the main rotary disk and the loading / unloading stations in the aforementioned working area and the aforementioned preparation area; each end-face gear plate meshing seat includes a rigid base and a floating pressure plate, and the floating pressure plate is connected to the rigid base through an elastic element to form a floating support structure; the meshing surface of the floating pressure plate is provided with a toothed structure, and the toothed structure meshes with the toothed structure of the end-face gear plate; the rotating shaft of the aforementioned rotary disk is installed in the mounting hole of the aforementioned main rotary disk through a linear bearing, so that the aforementioned rotary disk can float up and down; a first cylinder is provided in the aforementioned working area, and a second cylinder is provided in the aforementioned preparation area. The end-face gear plate can be mounted to the bottom of the aforementioned rotary disk via a flange. The end-face gear plate meshing seat can be provided at the connection points between the aforementioned main rotary disk and the loading / unloading stations in the aforementioned working area and the aforementioned preparation area via a flange. The aforementioned end-face gear plate is used for rigid locking when engaging with the aforementioned end-face gear plate meshing seat, thereby reducing rotation or angular deviation that occurs during the operation of the aforementioned rotary disk. The aforementioned elastic element can be a helical compression spring. The aforementioned elastic element is used to ensure that when the aforementioned cylinder lifts the aforementioned rotary disk and the aforementioned end-face gear plate engages with the aforementioned floating pressure plate, the clamping force is evenly distributed, thereby achieving a tight fit across the entire tooth surface. The aforementioned first cylinder can be mounted in the aforementioned working area via a flange, and the aforementioned second cylinder can be mounted in the aforementioned preparation area via a flange. Both the aforementioned first cylinder and the aforementioned second cylinder can be guide cylinders. The aforementioned first cylinder is used to extend its piston rod and lift the aforementioned rotary disk upward when the aforementioned rotary disk rotates to the aforementioned spraying station in the aforementioned working area. The aforementioned second cylinder is used to extend its piston rod and lift the aforementioned rotary disk upward when the aforementioned rotary disk rotates to the aforementioned loading / unloading station in the aforementioned preparation area. A non-contact proximity switch is fixedly installed on the aforementioned partition wall at the positions of the aforementioned preset spraying station in the aforementioned working area and the aforementioned preset loading / unloading station in the aforementioned preparation area. On the main turntable, at the corresponding mounting position of the self-rotating disc, a metal sensor is fixedly installed. The non-contact proximity switch and the metal sensor are used to detect the rotational position of the self-rotating disc. The preset loading and unloading stations can characterize the positions on the auxiliary turntable assembly used to place turbine blades.

[0048] The above-mentioned linkage control structure is configured as follows: In response to the detected rotation signal of the rotary table in the work area, the piston rod of the first cylinder is extended. In operation, when the main rotary table rotates, it moves a rotary table that has already been painted from the work area to the preparation area, and simultaneously moves a rotary table loaded with a new workpiece from the preparation area to the work area. During this process, the rotary table entering the preparation area enters the sensing area of ​​a non-contact proximity switch at a preset loading / unloading position in the preparation area. The non-contact proximity switch is triggered and sends a high-level switching signal to the linkage control structure. This high-level switching signal can be defined as the rotation signal of the rotary table in the work area.

[0049] In response to the detected rotation signal of the rotary table in the preparation area, the piston rod of the second cylinder is extended. In operation, when the main rotary table rotates, it moves a rotary table that has already been painted from the work area to the preparation area, and simultaneously moves a rotary table loaded with a new workpiece from the preparation area to the work area. During this process, the rotary table entering the work area enters the sensing area of ​​a non-contact proximity switch at a preset loading / unloading position in the work area. The non-contact proximity switch is triggered and sends a high-level switching signal to the linkage control structure. This high-level switching signal can be defined as the rotation signal of the rotary table in the preparation area.

[0050] The above-described technical solution, as an inventive point of this disclosure, solves technical problem three: localized thin coatings or missed areas, and poor coating thickness consistency among different blades in the same batch. The reasons for these issues are as follows: Under the extreme production cycle driven by delivery cycle pressure, the main turntable needs to start, stop, and rotate at a higher frequency and in a shorter time. The resulting transient centrifugal force and start-stop impact vibration are transmitted to the turntable and the quick-change tooling, causing the blades to elastically slide or wobble relative to the tooling positioning surface by several micrometers to tens of micrometers, resulting in localized thin coatings or missed areas, and poor coating thickness consistency among different blades in the same batch. To achieve this effect, in the plasma spraying system of this disclosure, the end-face toothed disk and the end-face toothed disk meshing seat ensure that the turbine blades will not rotate circumferentially during spraying or loading / unloading, even if affected by the reaction force generated during plasma spraying. This reduces the uneven coating thickness of the turbine blades after spraying due to workpiece drift. Furthermore, because the aforementioned floating support structure allows the elastic element to provide continuous and uniform clamping force when the first and second cylinders drive the floating pressure plate to press down and lock, the toothed surface of the floating pressure plate can adaptively and tightly fit with the toothed surface of the end face gear, thus ensuring reliability even under high-frequency and long-cycle use. Also, when switching workstations, the first and second cylinders retract, and the rotary table disengages from the end face gear meshing seat under neutral action, facilitating free rotation of the main rotary table. When the rotary table rotates to the target workstation, the piston rod of the corresponding cylinder extends, lifting the rotary table upwards, thus rigidly locking the end face gear with the upper floating pressure plate meshing seat. Therefore, it reduces the possibility of jamming, incomplete positioning, or mis-locking that may occur when relying on friction or simple pin positioning.

[0051] In addressing the technical problems mentioned above, and considering the application scenario where plasma spraying systems operate continuously under high loads for more than a critical time (e.g., 6 hours), the following technical problem often arises: the working state of key high-temperature components such as the plasma spray gun and stabilization chamber undergoes slow, subtle, and irreversible time-shift drift, causing the actual physical parameters of the spraying process to gradually deviate from the set window, resulting in poor coating quality. Based on the following requirements for this application scenario—adaptability to extreme continuous operation conditions, long-term stable high-precision output of the process system, and consistency of coating quality between the first and last coats—we have decided to adopt the following solution: Optionally, a predetermined number of heat dissipation fins are welded onto the outer shell of the aforementioned stable chamber; each of the aforementioned heat dissipation fins is internally connected to a cooling water pipe, which is connected in parallel to the main cooling water circuit of the aforementioned stable chamber; a measuring bracket is installed on the aforementioned partition wall, and the installation position of the measuring bracket is directly opposite the opening of the aforementioned stable chamber; the measuring bracket is equipped with at least three laser rangefinders, and the measuring beam of each of the at least three laser rangefinders is focused on the edge of the opening of the aforementioned stable chamber; a second predetermined number of annular heat sinks are fitted onto the rear cavity of the aforementioned plasma spray gun, and a thermal pad is sandwiched between each adjacent heat sink; The aforementioned thermal pad encapsulates a heat pipe, the end of which extends to a cooling fan. The aforementioned measuring bracket is also equipped with a water-cooled base, on which an infrared temperature sensor is mounted. A compressed air nozzle is connected to the rear of the water-cooled base, with its outlet facing the observation window of the infrared temperature sensor. The aforementioned stable chamber is mounted on the end effector of the aforementioned robotic arm via a micro-motion platform. The micro-motion platform may include three independently extendable adjusting screws, each driven by a servo motor. These adjusting screws are configured to adjust the spatial angle and position of the stable chamber based on feedback signals from the aforementioned laser rangefinder. The preset number of rotations can be 5. The second preset quantity can be 8 pieces. The heat dissipation fins can be continuous straight fins. The heat dissipation fins can be used to increase the heat dissipation area. The main cooling water channel of the stable chamber can be a flow channel machined inside the outer shell of the stable chamber. The aforementioned laser rangefinder can be threaded onto the aforementioned measuring bracket. The laser rangefinder can be used to measure the spatial coordinates of the edge of the opening of the stable chamber. The laser rangefinder sensor described above can be a laser triangulation displacement sensor. The cooling fan can be mounted on the rear cavity of the plasma spray gun via a mounting bracket, with its outlet facing the annular heat sink to blow cooling air onto it. The cooling fan can be used to air-cool the annular heat sink. In operation, firstly, the programmable logic controller (PLC) can determine the current pose of the stable chamber based on the distance to the edge of the opening of the stable chamber acquired by the laser rangefinder sensor, using a triangulation algorithm. The current pose of the stable chamber can be the spatial position and angle of the opening plane. Then, the PLC can determine the deviation between the current pose and the preset target pose by comparing the current pose of the stable chamber with the preset target pose. The target pose can be the preset spatial position and angle where the opening plane of the stable chamber should be. Subsequently, the PLC can calculate the required extension / retraction displacement of each of the adjusting screws based on the deviation and the three-dimensional model of the micro-motion platform using inverse kinematics.Finally, the programmable logic controller (PLC) can issue pulse sequence commands to the servo motors driving their respective regulating screws. These pulse sequence commands can include controlling the direction, speed, and displacement of the servo motors.

[0052] The above-described technical solution, as an inventive point of this disclosure, solves technical problem four: the actual physical parameters of the spraying process gradually deviate from the set window, resulting in poor coating quality. Solving this problem reduces the slow, subtle, and irreversible time-shifting of the working state of key high-temperature components such as the plasma spray gun and the stabilization chamber, which causes the actual physical parameters of the spraying process to gradually deviate from the set window, leading to poor coating quality. To achieve this effect, the plasma spraying system of this disclosure can continuously monitor the spatial pose of the stabilization chamber opening edge by directly facing the aforementioned measuring bracket and the aforementioned laser rangefinder, thereby converting the difficult-to-measure thermal expansion and dynamic offset into recognizable digital signals. Because the aforementioned micro-motion platform can adjust the spatial angle and three-dimensional position of the stabilization chamber in real time, the jet can always be aligned with the blades to be sprayed. Furthermore, because the aforementioned heat dissipation fins, parallel cooling water channels, annular heat sinks, heat pipes, and cooling fans can effectively dissipate the large amount of heat generated by the plasma spray gun and the stabilization chamber during continuous operation, the thermal expansion caused by excessive temperature rise in the plasma spray gun and the stabilization chamber can be reduced. The water-cooled base and compressed air nozzle mentioned above enable the infrared temperature sensor to work stably for a long time in a high-temperature dust environment, accurately monitoring the temperature of the jet, thereby keeping the process window stable for a long time.

[0053] The various embodiments disclosed above have the following beneficial effects: The plasma spraying system applied to turbine blades according to some embodiments of this disclosure can improve spraying efficiency, extend the electrode life of the plasma spray gun, and enhance operational safety. The reasons for the low spraying efficiency, low electrode life of the plasma spray gun, and low operational safety in the prior art are as follows: frequent ignition and shutdown significantly shorten the electrode life of the plasma spray gun, leading to frequent shutdowns for electrode replacement and increased costs; in every two workpieces sprayed, a significant amount of time is spent between workpiece replacement, cooling, and ventilation of the work area, resulting in low equipment utilization; during workpiece replacement, personnel still need to enter or be in close contact with the work area, and residual heat radiation and dust can cause burns to operators. Based on this, some embodiments of the plasma spraying system for turbine blades disclosed herein are characterized in that the spraying system includes a spray booth, a spraying device, and a turntable assembly. The spray booth includes a sealed working area, which is divided into a work area and a preparation area by a partition wall. The work area is the area for spraying the turbine blades, and the preparation area is the area for switching between placed turbine blades. The spraying device includes a robotic arm and a plasma spray gun. The robotic arm is mounted on the ground of the work area, and its end is connected to the plasma spray gun. The turntable assembly includes a main turntable and an auxiliary turntable assembly. The main turntable is provided with the sidewall of the spray booth, and the rotation axis of the main turntable is located on the upper... The separation between the work area and the preparation area is as follows: the main turntable is equipped with the auxiliary turntable assembly, which includes at least two rotating discs, each configured to rotate around its included axis; the edge of the main turntable is provided with an annular sealing ring, and the partition wall is provided with an arc-shaped sealing groove, which, together with the annular sealing ring, forms a dynamic sealing structure. The main turntable and the auxiliary turntable assembly can pass through the arc-shaped sealing groove when rotating, and the dynamic sealing structure is used to block dust; the plasma spray gun is in an ignition state during the process of the main turntable driving the rotating discs to switch positions between the work area and the preparation area, and the duration of a single position switch of the main turntable is less than or equal to a preset duration. Because the spray booth is divided into a work area and a preparation area, and the rotation axis of the main turntable is located at the partition wall between the work area and the preparation area, the auxiliary turntable of the main turntable can switch positions between the work area and the preparation area. Thus, while the workpiece is being sprayed in the work area, another workpiece can be loaded, unloaded and prepared in the preparation area, realizing parallel operation of spraying and workpiece change. This can reduce the waiting time required for spraying operations and improve the utilization rate of spraying operations.Furthermore, because the plasma spray gun remains ignited during the station switching process driven by the main turntable, and the single switching time of the main turntable is less than the preset value, the plasma spray gun can maintain continuous and stable operation for a long time, reducing electrode wear caused by thermal cycling, thereby extending the electrode life of the plasma spray gun. Also, because the dynamic sealing structure of the plasma spray gun and turntable assembly connected to the end effector of the robotic arm, as well as the exhaust device on the top of the spray booth, effectively isolates the sprayed powder from high-temperature radiation in a closed working area, the risk of operators coming into contact with high-temperature workpieces, inhaling dust, or suffering heat radiation burns can be reduced, thus enhancing operational safety.

[0054] The following is for reference. Figure 3 It shows a schematic diagram of the structure of an electronic device 300 (e.g., a computing device) suitable for implementing some embodiments of the present disclosure. Figure 3 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments of this disclosure.

[0055] like Figure 3 As shown, the electronic device 300 may include a processing unit 301 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 302 or a program loaded from a storage device 303 into a random access memory (RAM) 303. The RAM 303 also stores various programs and data required for the operation of the electronic device 300. The processing unit 301, ROM 302, and RAM 303 are interconnected via a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0056] Typically, the following devices can be connected to I / O interface 305: input devices 306 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 307 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 308 including, for example, magnetic tapes, hard disks, etc.; and communication devices 309. Communication device 309 allows electronic device 300 to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 3 An electronic device 300 with various devices is shown; however, it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed alternatively. Figure 3 Each box shown can represent a device or multiple devices as needed.

[0057] In particular, according to some embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, some embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication device 309, or installed from storage device 308, or installed from ROM 302. When the computer program is executed by processing device 301, it performs the functions defined in the methods of some embodiments of this disclosure.

[0058] It should be noted that, in some embodiments of this disclosure, the computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In some embodiments of this disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In some embodiments of this disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0059] In some implementations, clients and servers can communicate using any currently known or future-developed network protocol such as HTTP (Hypertext Transfer Protocol) and can interconnect with digital data communication (e.g., communication networks) of any form or medium. Examples of communication networks include local area networks (“LANs”), wide area networks (“WANs”), the Internet (e.g., the Internet of Things), and peer-to-peer networks (e.g., ad hoc peer-to-peer networks), as well as any currently known or future-developed networks.

[0060] The aforementioned computer-readable medium may be included in the aforementioned electronic device; or it may exist independently and not assembled into the electronic device. The aforementioned computer-readable medium carries one or more programs that, when executed by the electronic device, cause the electronic device to: control the piston rod of the first cylinder to extend in response to detecting a rotation signal of the rotary table in the working area; and control the piston rod of the second cylinder to extend in response to detecting a rotation signal of the rotary table in the preparation area.

[0061] Computer program code for performing operations of some embodiments of this disclosure can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0062] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0063] The functions described above in this document can be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), system-on-a-chip (SoCs), complex programmable logic devices (CPLDs), and so on.

[0064] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A plasma spraying system for turbine blades, characterized in that, The plasma spraying system includes a spray booth, a spraying device, and a rotary table assembly, wherein, The spray booth includes a closed working area, which is divided into a work area and a preparation area by a partition wall. The work area is the area for spraying the turbine blades, and the preparation area is the area for switching the placed turbine blades. The spraying device includes a robotic arm and a plasma spray gun. The robotic arm is installed on the ground in front of the work area, and the end of the robotic arm is connected to the plasma spray gun. The turntable assembly includes a main turntable and an auxiliary turntable assembly. The main turntable is fixed to the partition wall, and the rotation axis of the main turntable is located at the separation point between the work area and the preparation area. The auxiliary turntable assembly is mounted on the main turntable, and the auxiliary turntable assembly includes at least two self-rotating disks, each of which is configured to rotate about its included axis. The edge of the main turntable is provided with an annular sealing ring, and the partition wall is provided with an arc-shaped sealing groove. The arc-shaped sealing groove and the annular sealing ring form a dynamic sealing structure. The main turntable and the auxiliary turntable assembly can pass through the arc-shaped sealing groove when rotating. The dynamic sealing structure is used to block dust. The plasma spray gun is in an ignition state during the process of the main turntable driving the self-rotating disk to switch positions between the work area and the preparation area, and the duration of a single position switch by the main turntable is less than or equal to a preset duration.

2. The plasma spraying system for turbine blades according to claim 1, characterized in that, The preparation area is equipped with a protective door on its outer wall, and the work area is equipped with a test piece fixing structure.

3. The plasma spraying system for turbine blades according to claim 2, characterized in that, The horizontal distance between the test piece fixing structure and the center of the work area is 200~300mm, and the distance between the test piece fixing structure and the inner wall of the work area is greater than or equal to 150mm. The test piece fixing structure is used to fix the sprayed test piece.

4. The plasma spraying system for turbine blades according to claim 2, characterized in that, The plasma spraying system also includes a linkage control structure, which is used to control the protective door to close when the main turntable rotates.

5. The plasma spraying system for turbine blades according to claim 1, characterized in that, The rotation of each of the rotating disks is driven by a drive motor. Each of the rotating disks in the auxiliary rotating disk group is equipped with a quick-change fixture for the workpiece, and the quick-change fixture for the workpiece adopts a three-point positioning structure.

6. The plasma spraying system for turbine blades according to claim 1, characterized in that, The top of the spray booth is equipped with an exhaust system, which is configured to operate continuously throughout the entire process.

7. The plasma spraying system for turbine blades according to claim 1, characterized in that, The inner wall of the spray booth is covered with a heat-insulating and reflective coating, and the top of the spray booth is equipped with a high-temperature resistant exhaust pipe. The heat-insulating and reflective coating is a composite gradient coating, which includes a base layer, a middle layer, and an outer layer. The bottom layer is a high-temperature resistant ceramic base layer bonded to the inner wall of the spray booth, the middle layer is an aluminum coating, the outer layer is a coating made of anti-condensation material, and the total thickness of the heat-insulating and reflective coating is 0.5~1.2mm. The high-temperature resistant exhaust pipe is a stainless steel water-cooled jacketed pipe, and the inner wall of the high-temperature resistant exhaust pipe is lined with wear-resistant ceramic. The stainless steel water-cooled jacketed pipe has at least five annular turbulence ribs inside the jacket. The outer edges of the turbulence ribs are in close contact with the inner wall of the stainless steel water-cooled jacketed pipe to form a turbulence chamber. The wear-resistant ceramic lining is chromium oxide-based ceramic, and the heat-insulating and reflective coating is prepared using a supersonic flame spraying process.

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