CN-122013091-A - Plasma spraying system applied to turbine blade

CN122013091ACN 122013091 ACN122013091 ACN 122013091ACN-122013091-A

Abstract

The embodiment of the disclosure discloses a plasma spraying system applied to turbine blades, which is characterized by comprising a spraying room, a spraying device and a turntable group, wherein the spraying room comprises a closed working area, 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 turntable group comprises a main turntable and an auxiliary turntable group, the rotation axis of the main turntable is positioned at the separation position of the operation area and the preparation area, the auxiliary turntable group is arranged on the main turntable and comprises at least two self-turntables, each self-turntable is configured to rotate around the axis of the self-turntable, an annular sealing check ring is arranged at the edge of the main turntable, an arc sealing groove is arranged on the partition wall, and the plasma spray gun is in an ignition state in the process that the main turntable drives the self-turntables to switch stations between the operation area and the preparation area. The embodiment can improve the plasma spraying operation efficiency, prolong the service life of the electrode of the plasma spray gun and enhance the operation safety.

Inventors

QIAN YUANJI
JIN HAOTIAN
ZHENG JIANLIN
TANG KAI
NIU XINLEI

Assignees

江苏源清动力技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260319

Claims (7)

1. A plasma spraying system applied to turbine blades is characterized in that the plasma spraying system comprises a spraying room, a spraying device and a turntable assembly, wherein, The spraying room comprises a closed working area, wherein the closed working area is divided into an operation area and a preparation area by a partition wall, the operation area is an area for spraying the turbine blades, and the preparation area is an area for switching the placed turbine blades; The spraying device comprises a manipulator and a plasma spray gun, wherein the manipulator is arranged on the ground at the front side of the working area, and the tail end of the manipulator is connected with the plasma spray gun; the turntable assembly comprises a main turntable and an auxiliary turntable assembly, the main turntable is fixed on the partition wall, and the rotation axis of the main turntable is positioned at the partition position of the operation area and the preparation area; The auxiliary turntable assembly is mounted on the main turntable and comprises at least two self-turntables, and each self-turntable is configured to rotate around an axis included by the self-turntables; The edge of the main turntable is provided with an annular sealing check ring, the partition wall is provided with an arc-shaped sealing groove, the arc-shaped sealing groove and the annular sealing check ring form a dynamic sealing structure, the main turntable and the auxiliary turntable group can pass through the arc-shaped sealing groove when rotating, and the dynamic sealing structure is used for blocking dust; The plasma spray gun is in an ignition state in the process that the main rotary table drives the rotary table to switch stations between the operation area and the preparation area, and the single station switching time of the main rotary table is less than or equal to the preset time.
2. The plasma spray system for turbine blades as claimed in claim 1, wherein a protective door is installed on an outer wall of the preparation area, and the operation area is provided with a test piece fixing structure.
3. The plasma spraying system for turbine blades according to claim 2, wherein a horizontal distance between the test piece fixing structure and a center of the working area is 200-300 mm, a distance between the test piece fixing structure and an inner wall of the working area is 150mm or more, and the test piece fixing structure is used for fixing a spraying test piece.
4. The plasma spray system for a turbine blade of claim 2, further comprising a coordinated control structure for controlling the closing of the guard gate as the main rotor disk rotates.
5. The plasma spraying system for turbine blades according to claim 1, wherein the self-rotating disks are driven by a driving motor, the self-rotating disks included in the auxiliary rotating disk set are provided with workpiece quick-change tools, and the workpiece quick-change tools are all of three-point positioning structures.
6. The plasma spray system for turbine blades of claim 1, wherein an exhaust device is mounted on top of the spray booth, the exhaust device configured to run continuously throughout.
7. The plasma spraying system applied to the turbine blade according to claim 1, wherein a heat-insulating reflective coating is paved on the inner wall of the spraying room, and a high-temperature-resistant exhaust pipeline is installed at the top of the spraying room; the heat-insulating reflective coating is a composite gradient coating, and the composite gradient coating comprises a bottom layer, a middle layer and an outer layer; the bottom layer is a high-temperature-resistant ceramic bottom layer combined with the inner wall of the spraying room, the middle layer is an aluminum coating, the outer layer is a coating formed by coating anti-condensation materials, and the total thickness of the heat-insulating reflective coating is 0.5-1.2 mm; The high-temperature-resistant exhaust pipeline is a stainless steel water cooling jacket type pipeline, and the inner wall of the high-temperature-resistant exhaust pipeline is provided with a wear-resistant ceramic lining; At least five annular turbulence fins are arranged in the jacket of the stainless steel water cooling jacket type pipeline, and the outer edges of the turbulence fins are in close contact with the inner wall of the stainless steel water cooling jacket type pipeline to form a turbulence cavity; the wear-resistant ceramic lining is chromium oxide-based ceramic, and the heat-insulating reflective coating is prepared by adopting a supersonic flame spraying process.

Description

Plasma spraying system applied to turbine blade Technical Field The embodiment of the disclosure relates to the technical field of gas turbines, in particular to a plasma spraying system applied to turbine blades. Background Plasma spraying is a surface treatment technique for preparing protective or functional coatings on the surface of a workpiece. In the plasma spraying operation of precision parts such as turbine blades, conventional operation is usually performed sequentially in a single, closed spray booth. At present, a common mode is that firstly, an operator installs and fixes a workpiece to be sprayed, then the workpiece is removed from a working area, a plasma spray gun is started for spraying, then, after the spraying operation of a single workpiece is completed, the plasma spray gun is extinguished, after the working area is sufficiently cooled and dust is settled, the operator enters or opens the working area, the sprayed workpiece is detached, a new workpiece to be sprayed is installed, and then, the next operation is performed by re-ignition. However, in practice, it has been found that when using conventional plasma spray modes of operation, the following technical problems are often faced: The frequent ignition and flameout can greatly shorten the service life of the electrode of the plasma spray gun, so that the electrode needs to be frequently stopped and replaced, and the cost is increased; in the spraying task of every two workpieces, a lot of time is required to be consumed between the replacement of the workpieces and the cooling and ventilation of the working area, so that the utilization rate of equipment is low, and in the workpiece replacement stage, personnel still need to enter or closely contact the working area, and the residual heat radiation and dust can cause burn to operators. The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosed concept and, therefore, it may contain information that does not form the prior art that is known to those of ordinary skill in the art in this country. Disclosure of Invention The disclosure is in part intended to introduce concepts in a simplified form that are further described below in the detailed description. The disclosure is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. Some embodiments of the present disclosure propose a plasma spray system applied to turbine blades to address the technical issues mentioned in the background section above. In a first aspect, some embodiments of the present disclosure provide a plasma spraying system applied to turbine blades, where the plasma spraying system includes a spray booth, a spraying device, and a turntable assembly, where the spray booth includes a closed working area divided by a partition wall into an operation area and a preparation area, the operation area is an area for spraying the turbine blades, the preparation area is an area for switching the turbine blades, the spraying device includes a robot and a plasma spray gun, the robot is mounted on a ground surface in front of the operation area, a tip of the robot 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, a rotation axis of the main turntable is located at a separation position between the operation area and the preparation area, the auxiliary turntable assembly includes at least two self-rotating disks each configured to be a rotation axis around the self-rotating area, an annular seal ring is provided at an edge of the main turntable, the self-rotating ring is provided with a seal ring, and the seal ring is rotatably mounted at a position equal to a position of the arc-shaped seal ring, and the seal ring is rotatably mounted at a position corresponding to a position of the arc-shaped seal groove, and the seal ring is rotatably mounted at a position corresponding to a position of the arc-shaped seal ring. Optionally, a protective door is installed on the outer wall of the preparation area, and the operation area is provided with a test piece fixing structure. Optionally, a horizontal distance between the test piece fixing structure and a center of the operation area is 200-300 mm, a distance between the test piece fixing structure and an inner wall of the operation area is greater than or equal to 150mm, and the test piece fixing structure is used for fixing the spraying test piece. Optionally, the plasma spraying system further includes a linkage control structure, where the linkage control structure is used to control the protection door to close when the main turntable rotates. Optionally, the rotation of the self-rotating disc is driven by a driving motor, the self-rotating disc included by the auxiliar