CN120555941A - Spraying tool and spraying method for atmospheric plasma coating of flame tube of combustion chamber - Google Patents

Abstract

The invention relates to the technical field of aeroengine spraying tools, and provides a spraying tool for an atmospheric plasma coating of a flame tube of a combustion chamber, which is used for blocking an O-shaped air film ring groove of a protective flame tube through an O-shaped filling ring, so that no coating and other residues exist in the gap of the air film ring groove in the spraying operation of the atmospheric plasma coating of the flame tube of the combustion chamber, and the exceeding of the gap size of the air film ring groove is avoided; according to the O-shaped filling ring, the depth of the O-shaped filling ring inserted into the O-shaped air film annular groove is limited by the limiting part, the filling ring is prevented from entering the O-shaped air film annular groove too deeply, and after spraying is finished, the O-shaped filling ring is prevented from being removed to form surplus materials. The invention also provides a spraying method of the atmospheric plasma coating of the flame tube of the combustion chamber, which realizes the interval spraying and cooling of the single flame tube, and the continuous circulation of a plurality of flame tubes for spraying, thereby improving the overall spraying operation efficiency of the flame tube and avoiding the problem of overheat burning of the single flame tube.

Description

Spraying tool and spraying method for atmospheric plasma coating of flame tube of combustion chamber

Technical Field

The invention relates to the technical field of aero-engine tools and discloses a spraying tool and a spraying method for an atmospheric plasma coating of a flame tube of a combustion chamber.

Background

The flame tube of the combustion chamber of the aeroengine is required to adopt atmospheric plasma spraying to prepare a high-temperature heat-insulating coating so as to reduce the temperature of parts on the inner wall, the structure of the flame tube is generally a small-diameter horn-shaped structure, and the inner wall is formed by welding a plurality of sections of thin-wall sheet metal parts. In order to reduce the temperature of the inner wall during operation, the inner wall of the flame tube is also required to be fully provided with a plurality of air film holes which are distributed in the joint area of each section of sheet metal part, and in order to ensure the relative uniformity of air flow, the air film holes are generally welded and combined to form an O-ring air film groove.

Because the whole structure of the flame tube part is a small-diameter horn-shaped structure, the opening at one end is bigger and the opening at the other end is smaller. Because the diameter of the small opening end is very small, the size and the shape of the spray gun need to be comprehensively considered during spraying, because the spray gun can only spray from the large opening end to the small opening end of the part, and the air film groove faces the large opening end, after the coating is sprayed by atmospheric plasma, the inner and outer layer wall surfaces of the air film groove inevitably can be sprayed with the coating, once the out-of-tolerance of the gap of the air film groove is small, the cooling air flow is insufficient during working, and the service life of the part is influenced.

If the gap of the air film groove is corrected after spraying, and the gap of the air film groove meets the tolerance range, the sprayed coating is a zirconia ceramic coating, and cracks and chipping of the coating are very easy to occur during correction. Therefore, the gap of the air film groove is difficult to ensure without considering the influences of sand blowing, spraying temperature and impact force in the spraying process. Meanwhile, the components are sprayed in the inner cavity close to the seal, so that the heat dissipation effect is poor during spraying, and parts are easy to overheat during continuous spraying, so that the parts are burnt out. And the intermittent spraying efficiency is low, and the processing time period is long. After the air plasma spraying of the O-shaped ring groove on the complex inner wall of parts such as the flame tube of the combustion chamber of the aeroengine, the air film gap is ensured not to be reduced, and meanwhile, the spraying processing efficiency is improved, so that the technical problem which is urgently needed to be solved in engineering application is solved.

Disclosure of Invention

The invention aims to provide a flame tube atmospheric plasma coating spraying tool for a combustion chamber, which can ensure that no coating and other residues exist in a gas film groove gap in the flame tube atmospheric plasma coating spraying operation of the combustion chamber, and avoid the over-poor size of the gas film groove gap.

The invention aims to provide a spraying method of an atmospheric plasma coating of a combustor flame tube, which can prevent the overheating of the combustor flame tube and improve the spraying operation efficiency in the spraying operation of the atmospheric plasma coating of the combustor flame tube.

In order to achieve the technical effects, the technical scheme adopted by the invention is as follows:

the utility model provides a combustor flame tube atmosphere plasma coating spraying frock, its is used for shutoff protection the O type air film annular of flame tube inner wall, the spraying frock includes:

the cross section of the O-shaped filling ring is conical, one end of the O-shaped filling ring is a narrow end, the other end of the O-shaped filling ring is a wide end, and when the O-shaped filling ring is installed, the O-shaped filling ring faces towards and is inserted into the O-shaped air film ring groove through the narrow end;

And the limiting part is arranged at the wide end and is abutted against the inner wall of the O-shaped air film annular groove and used for limiting the insertion depth of the O-shaped filling ring when the O-shaped filling ring is inserted into the O-shaped air film annular groove.

Further, the limiting part comprises a limiting ring, the limiting ring is arranged on the inner wall of the wide end of the O-shaped air film annular groove, the limiting ring and the O-shaped filling ring form a limiting step, and the inner wall of the annular groove of the O-shaped air film annular groove is abutted to the limiting step.

Further, the anti-accumulation notch is arranged at the outer edge of the wide end and is used for preventing spraying paint from accumulating at the joint of the outer edge of the wide end and the outer wall of the annular groove of the O-shaped air film annular groove.

Further, the anti-accumulation notch is a step structure arranged at the outer edge of the wide end of the O-shaped filling ring, the bottom edge of the step structure is abutted with the outer wall of the annular groove of the O-shaped air film annular groove, and the inclination angle of the step structure is the same as the injection angle of the outlet of the atmospheric plasma spray gun.

Further, the O-shaped filling ring is an O-shaped silica gel filling ring.

A spraying method of an atmospheric plasma coating of a flame tube of a combustion chamber comprises the following steps:

s1, installing the spraying tool into an O-shaped air film ring groove of a flame tube;

S2, carrying out sand blasting treatment on the inner wall of the flame tube;

S3, fixing a plurality of flame tubes on a spraying clamp one by one;

s4, the spraying clamp is started to rotate, and the inner wall of the flame tube is sprayed by the atmospheric plasma spray gun and moves circularly along a preset route;

The method comprises the steps that an atmospheric plasma spray gun moves downwards from a starting point to a lowest point to be spray, the atmospheric plasma spray gun is reset upwards from the lowest point to the starting point to be cool, the atmospheric plasma spray gun moves to the position above a first flame tube and takes the atmospheric plasma spray gun as the starting point, after the spray and the cool are sequentially completed from the first flame tube, the atmospheric plasma spray gun is transversely moved to the next flame tube, the spray and the cool are sequentially completed again, the steps are repeated until the last flame tube completes the cool, the atmospheric plasma spray gun is transversely moved to the starting point to be more than the steps, and the spray is completed until the inner walls of all the flame tubes are circularly moved.

And further, the preparation method of the spraying tool comprises the steps of pouring raw materials into a filling ring mold, taking out the prepared semi-finished product from the mold after the raw materials are solidified, and cutting and trimming the semi-finished product to obtain the spraying tool.

Further, the filling ring mold comprises a cover plate and a base, wherein the cover plate is provided with a first cavity wall, the base is provided with a second cavity wall, and after the cover plate is fixed with the base, the first cavity wall and the second cavity wall surround to form a cavity for forming the spraying tool.

The O-shaped filling ring is used for blocking the O-shaped air film ring groove of the protective flame tube, no coating and other residues are arranged in the gap of the air film ring groove in the spraying operation of the atmospheric plasma coating of the flame tube of the combustion chamber, and the excessive size of the gap of the air film ring groove is avoided.

Before the inner wall of the flame tube is sprayed with the atmospheric plasma coating, the O-shaped gas film ring grooves for protecting the flame tube are blocked by the O-shaped filling rings, a plurality of flame tubes are fixed on the spraying clamp one by one, each flame tube rotates during spraying, the atmospheric plasma spray gun moves circularly along a preset route, the single flame tube is sprayed and cooled at intervals, and a plurality of flame tubes continuously circulate for spraying, so that the whole spraying operation efficiency of the flame tube is improved, and the problem of overheating and burning of the single flame tube is avoided.

Drawings

FIG. 1 is a schematic illustration of an O-ring packing installed in an O-ring groove of a flame tube during spraying in an embodiment;

FIG. 2 is an enlarged schematic view of the O-ring groove and O-ring of FIG. 1;

FIG. 3 is a schematic structural view of an O-ring;

FIG. 4 is a schematic cross-sectional view of an O-ring;

FIG. 5 is a schematic structural view of a packing ring mold for preparing an O-ring packing ring;

FIG. 6 is a schematic diagram of the preset path of an atmospheric plasma spray gun during spraying of a flame tube atmospheric plasma coating;

FIG. 7 is a schematic illustration of a flame tube clamped to a spray fixture.

The device comprises a 1-O-shaped filling ring, a 11-limiting ring, a 111-limiting step, a 12-annular anti-accumulation notch, a 4-spraying clamp, a 41-mandrel, a 42-shielding cover, 43-fixing screws, a 5-filling ring mold, a 51-cover plate, a 52-base, a 6-flame tube, a 61-O-shaped air film annular groove, a 62-groove inner wall, a 63-annular groove outer wall and a 7-atmosphere plasma spray gun.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.

Examples

Referring to fig. 1-5, a spraying fixture for an atmospheric plasma coating of a combustor flame tube 6 is used for blocking and protecting an O-shaped air film ring groove 61 on the inner wall of the flame tube 6, and the spraying fixture comprises:

the cross section of the O-shaped filling ring 1 is conical, the sharp end of the O-shaped filling ring 1 is a narrow end, the wide end of the O-shaped filling ring 1 is a wide end, and the O-shaped filling ring 1 is inserted with the narrow end facing the O-shaped air film annular groove 61 when being installed;

And the limiting part is arranged at the wide end, can be abutted with the inner wall 62 of the O-shaped air film annular groove 61 and is used for limiting the insertion depth of the O-shaped filling ring 1 when the O-shaped filling ring 1 is inserted into the O-shaped air film annular groove 61.

In the spraying operation of the atmospheric plasma coating of the combustor flame tube 6, the effective blocking protection of the O-shaped air film annular groove 61 is realized through the cooperation of the O-shaped filling ring 1 and the limiting part, so that no coating and other residues exist in the gap of the air film annular groove, and the gap size of the air film annular groove is prevented from being out of tolerance. Moreover, the conical design of the O-shaped filling ring 1 enables the O-shaped filling ring 1 to be smoothly inserted into the O-shaped air film annular groove 61, and the arrangement of the limiting part ensures that the O-shaped filling ring 1 cannot be excessively inserted, so that the O-shaped filling ring 1 cannot be taken out.

As shown in fig. 1 and 2, in some embodiments, the limiting portion includes a limiting ring 11, the limiting ring 11 is disposed on the inner wall of the wide end of the O-shaped air film ring groove 61, the limiting ring 11 and the O-shaped filling ring 1 form a limiting step 111, and when the O-shaped filling ring 1 is installed, the inner wall 62 of the O-shaped air film ring groove 61 abuts against the limiting step 111. In this embodiment, the depth of the O-shaped filling ring 1 inserted into the O-shaped air film annular groove 61 is effectively limited by the design of the limiting step 111, so that the O-shaped filling ring 1 can be smoothly taken out after the spraying is finished. Meanwhile, the limit ring 11 is tightly matched with the O-shaped filling ring 1, so that spraying materials can be prevented from penetrating into a gap between the O-shaped air film annular groove 61 and the O-shaped filling ring 1, and the blocking protection effect is further improved. It should be noted that, if the width of the stop collar 11 is smaller than or equal to the thickness of the inner wall 62 of the O-type air film groove 61, if the width of the stop collar 11 is larger than the inner wall 62 of the O-type air film groove 61, the stop collar 11 will extend to the inner side of the inner wall 62 of the O-type air film groove 61, and during the spraying operation, the inner wall 62 of the O-type air film groove 61 is partially shielded and has no coating.

As shown in fig. 1 and 2, in some embodiments, the spraying tool further includes an anti-stacking notch 12, where the anti-stacking notch 12 is disposed at the outer edge of the wide end, and the anti-stacking notch 12 is used to prevent the spraying paint from stacking at the contact position between the outer edge of the wide end and the outer wall 63 of the O-type air film ring groove 61. The outer ring edge of the O-shaped filling ring 1 is abutted with the ring groove outer wall 63 of the O-shaped air film ring groove 61, and in the spraying process, paint is easily accumulated at the abutted position, so that the O-shaped filling ring 1 is difficult to take out after spraying. According to the embodiment, through the design of the anti-accumulation notch, paint accumulation easily occurring in the spraying process is avoided, and the problem that the O-shaped filling ring 1 is difficult to take out after spraying is avoided.

In some embodiments, the anti-stacking notch 12 is a step structure disposed at the outer edge of the wide end of the O-shaped filling ring 1, the bottom edge of the step structure abuts against the outer wall 63 of the O-shaped air film ring groove 61, and the inclination angle of the step structure is the same as the injection angle of the atmospheric plasma spray gun outlet. The edge of the transition between the step structure and the top end of the O-shaped filling ring 1 is an A edge, the edge of the transition between the step structure and the circumferential curved surface of the O-shaped filling ring 1 is a B edge, when the O-shaped filling ring 1 is installed in the O-shaped air film annular groove 61, the B edge is abutted against the annular groove outer wall 63, a gap is reserved between the A edge and the annular groove outer wall 63, then the inclination angle of the step structure is the inclination angle of the connecting line of the A edge and the B edge, in the embodiment, the inclination angle of the connecting line of the A edge and the B edge is 45 degrees relative to the horizontal plane, as shown in fig. 4, because the spraying angle of an outlet of the atmospheric plasma spray gun 7 is also 45 degrees obliquely downwards, a spraying shadow zone is just formed in the annular anti-accumulation notch 12 during spraying, the fact that the annular groove outer wall 63 cannot be partially uncoated due to shielding of the top end of the O-shaped filling ring 1 can be ensured, the fact that the coating is not accumulated at the contact position of the annular groove outer wall 63 of the O-shaped filling ring 1 and the O-shaped air film annular groove 61 can be avoided, the top end of the O-shaped filling ring 1 is not contacted with the annular groove outer wall 63, the O-shaped filling ring is convenient for taking out the O-shaped filling ring 1 after the spraying is finished, and the coating cannot damage the coating is avoided.

In certain embodiments, the O-ring 1 is an O-ring filled with silicone. According to the characteristic of the spraying of the atmospheric plasma coating, the O-shaped filling ring 1 for protecting the O-shaped air film ring groove 61 can resist the high temperature and the scouring of the atmospheric plasma spraying in the spraying process, and after the spraying, the O-shaped filling ring 1 can be not adhered to the flame tube 6 and is easy to take out. If the O-ring 1 is made of metal, it is difficult to remove the O-ring 1 from the liner 6 after the O-ring 1 is coated, and if the O-ring 1 is forcibly removed, the partial coating of the liner 6 may be peeled off. Therefore, the embodiment selects the temperature-resistant silica gel with the atmospheric plasma spraying as the material for manufacturing the O-shaped filling ring 1, and the temperature-resistant silica gel has the advantages of 200 ℃ temperature resistance, proper hardness, certain plasticity, convenient filling, non-sticky spraying coating and the like.

Based on the same inventive concept, the embodiment also provides a spraying method of the atmospheric plasma coating of the combustor basket 6, comprising the following steps:

S1, installing O-shaped silica gel filling rings of the spraying tool into O-shaped air film annular grooves 61 of a plurality of flame tubes 6.

S2, the flame tubes 6 are aligned one by one the inner wall is subjected to sand blasting treatment.

S3, fixing a plurality of flame tubes 6 on a spraying fixture 4 one by one, wherein the spraying fixture 4 is provided with a plurality of flame tubes 6 which are sequentially arranged, for example, 6 flame tubes are arranged in a straight line, the spraying fixture 4 can rotate at the same rotating speed, as shown in figure 7, the spraying fixture 4 comprises a mandrel 41 and a bowl-shaped shielding cover 42, the mandrel 41 is arranged on a base 52, the mandrel 41 is connected with a motor through a transmission mode such as a gear or a belt to realize the rotation of the mandrel 41, each spraying fixture 4 can be matched with one motor, or all the spraying fixtures 4 can be driven by one motor, when the flame tubes 6 are clamped, the flame tubes 6 are arranged on the mandrel 41 in a small-caliber mode, the shielding cover 42 is arranged in the flame tubes 6 and connected with the mandrel 41, and finally, a fixing screw 43 is locked with the mandrel 41, so that the shielding cover 42 and the mandrel 41 lock the flame tubes 6.

S4, the spraying clamp 4 is started to rotate, the atmospheric plasma spray gun 7 sprays the inner wall of the flame tube 6 and circularly moves along a preset route, and the atmospheric plasma spray gun 7 adopts the 2086A spray gun of the existing Praxair company and is matched with the existing spraying system.

As shown in fig. 6, when the atmospheric plasma spray gun 7 sprays the single flame tube 6, the spraying action is set as the action of moving the atmospheric plasma spray gun 7 downwards from the starting point to the lowest point, such as the actions 1,4, 7,10, 13 and 16 in fig. 6, during the spraying action, the atmospheric plasma spray gun 7 sprays the inner wall of the flame tube 6, then the atmospheric plasma spray gun 7 is reset upwards from the lowest point to the starting point, such as the actions 2, 5, 8, 11, 14 and 17 in fig. 6, during the cooling action, the atmospheric plasma spray gun 7 stops spraying, and the sprayed area of the flame tube 6 enters the cooling time. As shown in fig. 6, when the atmospheric plasma spray gun 7 sprays a batch of flame tubes 6, the preset route when the atmospheric plasma spray gun 7 sprays is that the atmospheric plasma spray gun 7 reaches the upper side of the first flame tube 6 and starts from the upper side of the first flame tube 6, the spraying action 1 and the cooling action 2 are finished successively from the first flame tube 6, namely, the first spraying of the first flame tube 6 is finished, then the atmospheric plasma spray gun 7 carries out the traversing action 3 along the arrangement direction of the spraying clamp 4, the traversing preset distance is carried out to the second flame tube 6, then the spraying action 4 and the cooling action 5 are finished successively, the first spraying of the second flame tube 6 is finished, and the steps are repeated until the last flame tube 6 finishes the cooling action, the atmospheric plasma spray gun 7 resets to the corresponding starting point above the first flame tube 6 through the traversing action 18, and the actions are recycled until the inner walls of all the flame tubes 6 finish spraying. The atmospheric plasma spray gun 7 is realized in one cycle, a single flame tube 6 is sprayed once, and a plurality of flame tubes 6 are continuously sprayed in a circulating way.

S5, closing the atmospheric plasma spray gun 7 and all the spraying clamps 4, taking out the O-shaped silica gel filling ring of the sprayed flame tube 6, taking the flame tube 6 off the mandrel 41, and waiting for clamping and spraying of the next batch of flame tubes 6 which are not sprayed.

In the embodiment, before the inner wall of the flame tube 6 is sprayed with the atmospheric plasma coating, the O-shaped filling ring 1 is utilized to seal and protect the O-shaped air film annular groove 61 of the flame tube 6, so that no coating and other residues exist in the air film annular groove gap, and the air film annular groove gap size is prevented from exceeding. In addition, in the embodiment, the flame barrels 6 are fixed on the spraying fixture 4 one by one, each flame barrel 6 rotates during spraying, the atmospheric plasma spray gun 7 moves circularly along a preset route, the single flame barrel 6 is sprayed and cooled at intervals, the plurality of flame barrels 6 continuously circulate for spraying, the whole spraying operation efficiency of the flame barrels 6 is improved, the spraying temperature of the inner wall of the flame barrel 6 is controlled within a reasonable temperature range, and the problem of overheat burning caused by continuous spraying of the single flame barrel 6 is avoided.

In some embodiments, as shown in fig. 5, the filling ring mold 5 includes a cover plate 51 and a base 52, the cover plate 51 is provided with a first cavity wall, the base 52 is provided with a second cavity wall, and after the cover plate 51 is fixed with the base 52 through bolts, the first cavity wall and the second cavity wall enclose a cavity for forming the spraying tool, and the cavity is a cavity with a top annular seam. The preparation method of the O-shaped filling ring 1 of the spraying tool comprises the steps of pouring raw materials into a filling ring mold 5 through a circumferential seam, taking out the prepared O-shaped filling ring 1 of the spraying tool from the mold after the raw materials are solidified, and then flattening the top of the O-shaped filling ring 1 to ensure that the connecting line of an edge A and an edge B is 45 degrees. It should be noted that, in this embodiment, the O-shaped silica gel filling ring is made of a heat-resistant silica gel material, so the raw material of the filling mold is a corresponding heat-resistant silica gel raw material, and in the process of forming the O-shaped silica gel filling ring, air bubbles can be removed by vacuumizing if necessary. Since the O-type silicone packing ring is used in a large amount, which is a consumable, the packing ring mold 5 can be manufactured by 3D printing to reduce the cost and shorten the manufacturing cycle.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (8)

Translated fromChinese

1.一种燃烧室火焰筒大气等离子涂层喷涂工装，用于封堵保护所述火焰筒(6)内壁的O型气膜环槽(61)，其特征在于，所述喷涂工装包括：1. A combustion chamber flame tube atmospheric plasma coating spraying tool, used for sealing and protecting the O-type air film ring groove (61) on the inner wall of the flame tube (6), characterized in that the spraying tool comprises:O型填充环(1)，所述O型填充环(1)的横截面呈锥形，其一端为窄端，另一端为宽端，所述O型填充环(1)在安装时，以所述窄端用于插入所述O型气膜环槽(61)；An O-type filling ring (1), wherein the cross section of the O-type filling ring (1) is tapered, with one end being a narrow end and the other end being a wide end. When the O-type filling ring (1) is installed, the narrow end is used to be inserted into the O-type air film ring groove (61);限位部，所述限位部设于所述宽端，所述限位部与O型气膜环槽(61)的环槽内壁(62)抵接，用于在所述O型填充环(1)插入O型气膜环槽(61)时，限定O型填充环(1)的插入深度。A limiting portion is provided at the wide end, the limiting portion abuts against the inner wall (62) of the O-type air film ring groove (61), and is used to limit the insertion depth of the O-type filling ring (1) when the O-type filling ring (1) is inserted into the O-type air film ring groove (61).2.根据权利要求1所述的燃烧室火焰筒大气等离子涂层喷涂工装，其特征在于，所述限位部包括限位环(11)，所述限位环(11)设在所述O型气膜环槽(61)的宽端内壁，所述限位环(11)与O型填充环(1)构成限位台阶(111)，所述O型气膜环槽(61)的环槽内壁(62)与所述限位台阶(111)抵接。2. The combustion chamber flame tube atmospheric plasma coating spraying tool according to claim 1 is characterized in that the limiting part includes a limiting ring (11), the limiting ring (11) is arranged on the wide end inner wall of the O-type air film ring groove (61), the limiting ring (11) and the O-type filling ring (1) form a limiting step (111), and the inner wall (62) of the ring groove of the O-type air film ring groove (61) abuts against the limiting step (111).3.根据权利要求1所述的燃烧室火焰筒大气等离子涂层喷涂工装，其特征在于，还包括：3. The combustion chamber flame tube atmospheric plasma coating spraying tool according to claim 1, characterized in that it also includes:防堆积缺口，所述防堆积缺口设于所述宽端外边缘，所述防堆积缺口用于防止喷涂涂料堆积在所述宽端外边缘与O型气膜环槽(61)的环槽外壁(63)的抵接处。An anti-accumulation notch is provided at the outer edge of the wide end, and is used to prevent the spray paint from accumulating at the junction of the outer edge of the wide end and the outer wall (63) of the O-type air film ring groove (61).4.根据权利要求3所述的燃烧室火焰筒大气等离子涂层喷涂工装，其特征在于，所述防堆积缺口为设置于所述O型填充环(1)的宽端外边缘的台阶结构，所述台阶结构的底面边缘与所述O型气膜环槽(61)的环槽外壁(63)抵接，且所述台阶结构的倾角与大气等离子喷枪出口的喷射角度相同。4. The combustion chamber flame tube atmospheric plasma coating spraying tool according to claim 3 is characterized in that the anti-accumulation notch is a step structure arranged on the outer edge of the wide end of the O-type filling ring (1), the bottom edge of the step structure abuts against the outer wall (63) of the O-type air film ring groove (61), and the inclination angle of the step structure is the same as the injection angle of the atmospheric plasma spray gun outlet.5.根据权利要求1所述的燃烧室火焰筒大气等离子涂层喷涂工装，其特征在于，所述O型填充环(1)为O型硅胶填充环。5. The combustion chamber flame tube atmospheric plasma coating spraying tool according to claim 1, characterized in that the O-type filling ring (1) is an O-type silicone filling ring.6.一种燃烧室火焰筒大气等离子涂层喷涂方法，其特征在于，包括以下步骤：6. A method for spraying a combustion chamber flame tube atmospheric plasma coating, characterized in that it comprises the following steps:S1.将如权利要求1-5任一所述的喷涂工装安装到火焰筒(6)的O型气膜环槽(61)中；S1. Install the spray tool as described in any one of claims 1-5 into the O-shaped air film ring groove (61) of the flame tube (6);S2.对所述火焰筒(6)内壁进行吹砂处理；S2. Sandblasting the inner wall of the flame tube (6);S3.将若干所述火焰筒(6)逐个固定在喷涂夹具(4)上；S3. The plurality of flame tubes (6) are fixed one by one on the spray fixture (4);S4.所述喷涂夹具(4)开启自转，大气等离子喷枪(7)对所述火焰筒(6)内壁进行喷涂，并沿预设路线循环运动；S4. The spray fixture (4) is turned on and rotated, and the atmospheric plasma spray gun (7) sprays the inner wall of the flame tube (6) and circulates along a preset route;其中，设所述大气等离子喷枪(7)从起始点向下移动至最低点为喷涂动作，所述大气等离子喷枪(7)从所述最低点向上复位至所述起始点为冷却动作，所述预设路线为：所述大气等离子喷枪(7)移动到第一个火焰筒(6)的上方并以此为起始点，自所述第一个火焰筒(6)开始，依次完成所述喷涂动作和所述冷却动作后，然后大气等离子喷枪(7)横移至下一个火焰筒(6)，再次依次完成所述喷涂动作和所述冷却动作，如此重复，直至最后一个火焰筒(6)完成所述冷却动作后，所述大气等离子喷枪(7)横移复位至起始点，循环以上动作，直至所有所述火焰筒(6)内壁完成喷涂。Wherein, it is assumed that the atmospheric plasma spray gun (7) moves downward from the starting point to the lowest point as a spraying action, and the atmospheric plasma spray gun (7) resets upward from the lowest point to the starting point as a cooling action, and the preset route is: the atmospheric plasma spray gun (7) moves to the top of the first flame tube (6) and takes it as the starting point, starting from the first flame tube (6), completing the spraying action and the cooling action in sequence, and then the atmospheric plasma spray gun (7) moves horizontally to the next flame tube (6), and completes the spraying action and the cooling action in sequence again, and repeats this until the last flame tube (6) completes the cooling action, and the atmospheric plasma spray gun (7) moves horizontally and resets to the starting point, and the above actions are repeated until the inner walls of all the flame tubes (6) are sprayed.7.根据权利要求6所述的燃烧室火焰筒大气等离子涂层喷涂方法，其特征在于，所述喷涂工装的制备方法是：向填充环模具(5)内灌注原料，待原料固化后，从模具中取出制得的半成品，然后对所述半成品切削修整，得到所述喷涂工装。7. The method for spraying atmospheric plasma coating on a combustion chamber flame tube according to claim 6 is characterized in that the preparation method of the spraying tool is: pouring raw materials into a filling ring mold (5), and after the raw materials are solidified, taking out the semi-finished product from the mold, and then cutting and trimming the semi-finished product to obtain the spraying tool.8.根据权利要求7所述的燃烧室火焰筒大气等离子涂层喷涂方法，其特征在于，所述填充环模具(5)包括盖板(51)和底座(52)，所述盖板(51)设有第一型腔壁，所述底座(52)设有第二型腔壁，所述盖板(51)与所述底座(52)固定后，所述第一型腔壁与所述第二型腔壁合围构成用于成型所述喷涂工装的型腔。8. The combustion chamber flame tube atmospheric plasma coating spraying method according to claim 7 is characterized in that the filling ring mold (5) includes a cover plate (51) and a base (52), the cover plate (51) is provided with a first cavity wall, and the base (52) is provided with a second cavity wall. After the cover plate (51) and the base (52) are fixed, the first cavity wall and the second cavity wall are combined to form a cavity for forming the spraying tooling.