A method and system for partitioned sand control of a monolithic axial flow vane disc

Abstract

The present application relates to a kind of integral axial flow blade disc partition sand prevention method and system, belong to the field of aero-engine compressor blade disc, comprising the following steps: using ultrasonic cleaning blade disc body blade and removing oxide layer;For the damage difference of different regions of blade, first damage area of blade basin, second damage area of blade basin, first damage area of blade back, second damage area of blade back, blade top damage area and undamaged area are divided on blade;The present application is by dividing region on blade and stage to damaged area spray anti-erosion coating, under the condition that first damage area of blade basin and first damage area of blade back thickness is 12 μm ~ 20 μm and second damage area of blade basin, second damage area of blade back and blade top damage area thickness is 6 μm ~ 10 μm, can greatly improve the anti-erosion ability of blade disc body, while also guarantee the aerodynamic performance and strength demand of blade disc body.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of aero-engine compressor blade disc, and particularly relates to a partition sand prevention method for a whole axial blade disc. BACKGROUND

[0002] When an aerial vehicle serves across regions, the engine thereof will inevitably suck in particles such as sand and dust, especially in plains and deserts. The compressor, especially the rotor blade disc thereof as the inlet of the engine, is seriously eroded by sand particles at high speed rotation, thereby causing the performance of the engine to decrease and even causing reliability risks such as fatigue damage, which greatly restricts the actual use value of the aerial vehicle.

[0003] In order to alleviate this situation, there are currently three common methods:

[0004] 1) Thickening the blade profile of the blade disc, that is, increasing the thickness of the eroded part of the blade profile to improve the anti-erosion ability;

[0005] 2) Replacing the material of the whole blade disc with a wear-resistant material, that is, replacing the eroded material such as titanium alloy with a high-temperature alloy material;

[0006] 3) Coating the blade of the blade disc with an anti-erosion coating, that is, coating the blade and the disc body surface with a hard coating without distinction, so as to improve the anti-erosion ability of sand and dust through the hard coating.

[0007] However, when the method 1) is adopted, sand and dust are easily eroded at the blade tip leading edge due to the influence of centrifugal force after high-speed rotation, but this area is sensitive to aerodynamic performance, and after thickening, the aerodynamic performance decreases obviously, and at the same time, after thickening the blade tip leading edge, the stress of the blade root and the deformation of the blade profile are difficult to control, thereby affecting the strength of the blade disc. When the method 2) is adopted, the strength of the high-temperature alloy is lower than that of the titanium alloy, so it is difficult to meet the strength requirement. When the method 3) is adopted, the hardness of the hard coating is greatly different from that of the substrate, and has high bonding force, which causes the material performance of the blade body to decrease, thereby affecting the strength requirement of the body. SUMMARY

[0008] In view of the above problems, the present application provides a partition sand prevention method for a whole axial blade disc, which greatly improves the anti-erosion ability of the blade disc under the premise of guaranteeing the aerodynamic performance and strength requirement of the blade disc.

[0009] The technical scheme adopted by the present application is as follows:

[0010] A partition sand prevention method for a whole axial blade disc, comprising the following steps:

[0011] cleaning the blades of the blade disc body by ultrasonic waves and removing the oxide layer;

[0012] The first damage area of the blade basin, the second damage area of the blade basin, the first damage area of the blade back, the second damage area of the blade back, the damage area of the blade top and the undamaged area are divided on the blade according to the damage difference of different areas of the blade;

[0013] The anti-erosion coating is sprayed on the first damage area of the blade basin and the first damage area of the blade back, the spraying thickness is 6-10 μm, and the deposition speed is ≤1 μm / h;

[0014] The anti-erosion coating is further sprayed on the second damage area of the blade basin, the second damage area of the blade back, the damage area of the blade top and the first damage area of the blade basin and the first damage area of the blade back which have been sprayed with the anti-erosion coating, the spraying thickness is 6-10 μm, and the deposition speed is ≤1 μm / h;

[0015] The undamaged area is subjected to mechanical shot peening or laser strengthening treatment;

[0016] The surface state of the anti-erosion coating is checked, and the adjacent anti-erosion coatings and the transition of the anti-erosion coating and the undamaged area are checked.

[0017] Further, the difference of the joint of the anti-erosion coatings of the first damage area of the blade basin and the second damage area of the blade basin, the first damage area of the blade back and the second damage area of the blade back, the damage area of the blade top and the first damage area of the blade basin, the damage area of the blade top and the first damage area of the blade back, the damage area of the blade top and the second damage area of the blade basin, the damage area of the blade top and the second damage area of the blade back is ≤10 μm.

[0018] Further, the damage area of the blade basin includes the first damage area of the blade basin and the second damage area of the blade basin, and the wear degree of the first damage area of the blade basin is greater than that of the second damage area of the blade basin and the damage area of the blade top.

[0019] Further, the damage area of the blade back includes the first damage area of the blade back and the second damage area of the blade back, and the wear degree of the first damage area of the blade back is greater than that of the second damage area of the blade back and the damage area of the blade top.

[0020] Further, the second damage area of the blade basin, the second damage area of the blade back and the undamaged area which have been sprayed with the anti-erosion coating are sprayed with the anti-erosion coating, and meet the following height conditions:

[0021] H1 is 50%-70% of H;

[0022] H2 is 50%-70% of H;

[0023] H3 is 80%-95% of H;

[0024] Wherein, H is the height of the blade, H1 is the height of the second damage area of the blade basin, H2 is the height of the undamaged area, and H3 is the height of the second damage area of the blade back.

[0025] Further, the first damage area of the blade pressure surface, the first damage area of the blade suction surface and the damage area of the blade suction surface after spraying the anti-erosion coating meet the following length conditions:

[0026] L1 is 40% to 60% of L;

[0027] L2 is 20% to 40% of L;

[0028] L3 is 40% to 60% of L;

[0029] L is the chord length of the blade; L1 is the chord length of the first damage area of the blade pressure surface; L2 is the chord length of the first damage area of the blade suction surface; and L3 is the chord length of the damage area of the blade suction surface.

[0030] Further, the first damage area of the blade pressure surface, the first damage area of the blade suction surface and the second damage area of the blade suction surface after spraying the anti-erosion coating meet the following angle conditions:

[0031] a1° is 60° to 80°;

[0032] a2° is 70° to 90°;

[0033] a3° is 10° to 40°;

[0034] a4° is 10° to 40°;

[0035] a5° is 20° to 40°;

[0036] a6° is 10° to 30°;

[0037] a1° is the angle between the first damage area of the blade pressure surface and the blade tip; a2° is the angle between the second damage area of the blade pressure surface and the blade trailing edge; a3° is the angle between the first damage area of the blade pressure surface and the blade leading edge; a4° is the angle between the second damage area of the blade pressure surface and the hub of the blade disc body; a5° is the angle between the first damage area of the blade suction surface and the blade tip; and a6° is the angle between the second damage area of the blade suction surface and the blade tip.

[0038] Further, the first damage area of the blade pressure surface, the first damage area of the blade suction surface and the second damage area of the blade suction surface after spraying the anti-erosion coating meet the following rounding conditions:

[0039] R1 is 15 to 30 mm;

[0040] R2 is 10 to 30 mm;

[0041] R1 is the rounding diameter of the first damage area of the blade pressure surface; and R2 is the rounding diameter of the second damage area of the blade pressure surface.

[0042] Further, the surface roughness of the anti-erosion coating is less than or equal to Ra 0.8 microns.

[0043] The whole axial blade disc partition sand prevention system comprises:

[0044] The cleaning module is used for cleaning the blades of the blade disc body by using ultrasonic waves and removing the oxide layer.

[0045] The area partition module is used for partitioning the first damage area of the blade basin, the second damage area of the blade basin, the first damage area of the blade back, the second damage area of the blade back, the damage area of the blade top and the undamaged area on the blade according to the damage difference of different areas of the blade.

[0046] The initial spraying module is used for spraying the anti-erosion coating on the first damage area of the blade basin and the first damage area of the blade back; the spraying thickness is 6-10 microns; and the deposition speed is less than or equal to 1 micron per hour.

[0047] The re-spraying module is used for spraying the anti-erosion coating on the second damage area of the blade basin, the second damage area of the blade back, the damage area of the blade top and the first damage area of the blade basin and the first damage area of the blade back which have been sprayed with the anti-erosion coating; the spraying thickness is 6-10 microns; and the deposition speed is less than or equal to 1 micron per hour.

[0048] The strengthening treatment module is used for strengthening the undamaged area.

[0049] The inspection module is used for inspecting the surface state of the anti-erosion coating, the adjacent anti-erosion coating and the transition of the anti-erosion coating and the undamaged area.

[0050] Compared with the prior art, the present application has the following advantages:

[0051] 1) The present application can greatly improve the anti-erosion ability of the blade disc body by partitioning the blade and spraying the anti-erosion coating on the damaged area in stages, while meeting the thickness requirements of the first damage area of the blade basin and the first damage area of the blade back (12-20 microns) and the thickness requirements of the second damage area of the blade basin, the second damage area of the blade back and the damage area of the blade top (6-10 microns), and guaranteeing the aerodynamic performance and strength requirements of the blade disc body.

[0052] 2) The present application can effectively reduce the influence of the coating on the mechanical properties of the substrate by spraying the anti-erosion coating on the subdivided area of the blade, and guarantee the aerodynamic performance of the blade disc body.

[0053] 3) The present application can quickly partition the blade and subsequently spray the anti-erosion coating on the partitioned area by using ultrasonic waves to clean the blade disc body and remove the oxide layer, thereby improving the spraying efficiency.

[0054] 4) The present application divides the damage difference of different areas of the blade, so as to spray the anti-erosion coating with different thicknesses in a targeted manner, so as to improve the anti-erosion ability of the blade disc body.

[0055] 5) The deposition rate in the present application is ≤1 μm / h, which can ensure that the blade after spraying the anti-erosion coating meets the inspection requirements, that is, the height condition, length condition, angle condition and rounding condition inspection requirements.

[0056] 6) The present application checks the surface state of the anti-erosion coating, checks the adjacent anti-erosion coating and the transition of the anti-erosion coating and the undamaged area, so as to ensure the aerodynamic performance and strength requirement of the blade disc body, and greatly improve the anti-erosion ability of the blade disc body.

[0057] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structures indicated in the specification, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0059] Figure 1 A flow chart of a whole axial blade disc partition sand prevention method is shown;

[0060] Figure 2 A block diagram of a whole axial blade disc partition sand prevention system is shown;

[0061] Figure 3 A structural schematic diagram of a blade disc body is shown;

[0062] Figure 4 A schematic diagram of a blade basin damage area on a blade disc body is shown;

[0063] Figure 5 A schematic diagram of the included angles of a blade basin first damage area and a blade basin second damage area with a blade is shown;

[0064] Figure 6 A schematic diagram of a blade back damage area on a blade disc body is shown;

[0065] Figure 7A schematic diagram showing the included angle between the first damage area of the suction surface and the blade and the included angle between the second damage area of the suction surface and the blade is shown.

[0066] Figure 8 A schematic diagram showing the first damage area of the suction surface on the blade disc body is shown.

[0067] Reference signs: 1, blade disc body 1; 11, hub; 2, blade; 21, suction surface; 22, pressure surface; 23, trailing edge; 24, blade basin; 25, leading edge; 3, blade basin damage area; 31, first damage area of the blade basin; 32, second damage area of the blade basin; 4, suction surface damage area; 41, first damage area of the suction surface; 42, second damage area of the suction surface; 5, pressure surface damage area; 6, undamaged area. DETAILED DESCRIPTION

[0068] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0069] Embodiment one

[0070] Figure 1 A flow chart of a partitioned sand prevention method for a whole axial blade disc is shown. Figure 3 A structural schematic diagram of the blade disc body is shown. Figure 8 A schematic diagram showing the first damage area of the suction surface on the blade disc body is shown. Referring to Figure 1 , 3 , 8, a partitioned sand prevention method for a whole axial blade disc, comprising the following steps:

[0071] The blade 2 of the blade disc body 1 is cleaned by ultrasonic waves and the oxide layer is removed;

[0072] The blade basin first damage area 31, the blade basin second damage area 32, the first damage area of the suction surface 41, the second damage area of the suction surface 42, the pressure surface damage area 5 and the undamaged area 6 are divided on the blade 2 according to the damage difference of different areas of the blade 2;

[0073] The blade basin first damage area 31 and the first damage area of the suction surface 41 are sprayed with an anti-erosion coating; the spraying thickness is 6 μm-10 μm; the deposition speed is ≤1 μm / h;

[0074] Then, the anti-erosion coating is sprayed on the second damage area 32 of the blade concave, the second damage area 42 of the blade back, the damage area 5 of the blade top, and the first damage area 31 and the first damage area 41 of the blade concave and the blade back which have been sprayed with the anti-erosion coating; the spraying thickness is 6-10 microns; the deposition speed is less than or equal to 1 micrometer per hour;

[0075] The non-damage area 6 is subjected to mechanical shot blasting or laser strengthening treatment.

[0076] The surface state of the anti-erosion coating is inspected, and the adjacent anti-erosion coating and the transition part between the anti-erosion coating and the non-damage area 6 are also inspected.

[0077] Specifically, the surface quality of the blade 2 is improved after the mechanical shot blasting or laser strengthening treatment, thereby improving the fatigue resistance of the blade 2.

[0078] Specifically, the material of the anti-erosion coating can be selected from, but is not limited to, one or a mixture of TiN, ZrN, and Cr-CrAlN, which can greatly improve the anti-erosion ability of the blade disc body 1 under the premise of meeting the aerodynamic performance and strength requirements of the blade disc body 1.

[0079] Specifically, after the anti-erosion coating is sprayed, the arc ion plating deposition is adopted, and the deposition temperature of the anti-erosion coating is less than or equal to 500 degrees Celsius, thereby improving the anti-erosion ability of the blade disc.

[0080] Specifically, the material of the blade disc body 1 can be selected from, but is not limited to, TC4 and TC11 titanium alloy, thereby ensuring the service life of the blade disc body 1.

[0081] Specifically, the thickness of the same position of the plurality of blades 2 on the blade disc body 1 is less than or equal to ±2 microns, thereby effectively reducing the influence of the coating on the mechanics of the substrate.

[0082] Specifically, the first damage area 31 of the blade concave and the second damage area 32 of the blade concave are located at the blade concave 24 of the blade 2.

[0083] Specifically, the first damage area 41 of the blade back and the second damage area 42 of the blade back are located at the blade back 21 of the blade 2.

[0084] Specifically, the damage area 5 of the blade top is located at the blade top 22 of the blade 2.

[0085] Specifically, the blade concave 24 and the blade back 21 of the blade 2 both have the non-damage area 6.

[0086] In some embodiments, the difference between the anti-erosion coating of the ablated area of the leading edge 5 and the ablated area of the leading edge 31, the ablated area of the leading edge 5 and the ablated area of the leading edge 41, the ablated area of the leading edge 5 and the ablated area of the trailing edge 32, the ablated area of the leading edge 5 and the ablated area of the trailing edge 42 is less than or equal to 10 microns. The difference of less than or equal to 10 microns ensures the aerodynamic performance and strength requirements of the blade disc body 1, while greatly improving the anti-erosion ability of the blade disc body 1.

[0087] Specifically, the anti-erosion coating of the ablated area of the leading edge 5 and the ablated area of the leading edge 31, the ablated area of the leading edge 5 and the ablated area of the leading edge 41, the ablated area of the leading edge 5 and the ablated area of the trailing edge 32, the ablated area of the leading edge 5 and the ablated area of the trailing edge 42 is continuous. This achieves the purpose of protection.

[0088] Figure 4 A schematic diagram of the ablated area of the leading edge on the blade disc body is shown. As shown in Figure 4 some embodiments, the ablated area of the leading edge 3 includes a first ablated area of the leading edge 31 and a second ablated area of the leading edge 32, and the wear degree of the first ablated area of the leading edge 31 is greater than that of the second ablated area of the leading edge 32 and the ablated area of the leading edge 5.

[0089] In some embodiments, the thickness of the anti-erosion coating sprayed on the first ablated area of the leading edge 31 is 8 microns. This ensures the aerodynamic performance and strength requirements of the blade disc body 1, while greatly improving the anti-erosion ability of the blade disc body 1.

[0090] In some embodiments, the thickness of the anti-erosion coating sprayed on the second ablated area of the leading edge 32 is 6 microns. This ensures the aerodynamic performance and strength requirements of the blade disc body 1, while greatly improving the anti-erosion ability of the blade disc body 1.

[0091] Figure 6 A schematic diagram of the ablated area of the trailing edge on the blade disc body is shown. As shown in Figure 6 some embodiments, the ablated area of the trailing edge 4 includes a first ablated area of the trailing edge 41 and a second ablated area of the trailing edge 42, and the wear degree of the first ablated area of the trailing edge 41 is greater than that of the second ablated area of the trailing edge 42 and the ablated area of the leading edge 5.

[0092] In some embodiments, the thickness of the anti-erosion coating sprayed on the first ablated area of the leading edge 31 is 8 microns. This ensures the aerodynamic performance and strength requirements of the blade disc body 1, while greatly improving the anti-erosion ability of the blade disc body 1.

[0093] In some embodiments, the thickness of the anti-erosion coating sprayed on the second damaged area 32 of the blade basin is 7 μm; while ensuring the aerodynamic performance and strength requirements of the blade disc body 1, the anti-erosion capability of the blade disc body 1 is greatly improved.

[0094] In some embodiments, the second damaged area 32 of the blade basin, the second damaged area 42 of the blade back and the undamaged area 6 after spraying the anti-erosion coating meet the following height conditions:

[0095] H1 is 50% to 70% of H;

[0096] H2 is 50% to 70% of H;

[0097] H3 is 80% to 95% of H;

[0098] Wherein, H is the height of the blade 2; H1 is the height of the second damaged area 32 of the blade basin; H2 is the height of the undamaged area 6; H3 is the height of the second damaged area 42 of the blade back; the blade 2 after spraying the anti-erosion coating meets the height conditions, which can play a protective role and greatly improve the anti-erosion capability of the blade disc body 1 while ensuring the aerodynamic performance and strength requirements of the blade disc body 1.

[0099] In some embodiments, the first damaged area 31 of the blade basin, the first damaged area 41 of the blade back and the damaged area 4 of the blade back after spraying the anti-erosion coating meet the following length conditions:

[0100] L1 is 40% to 60% of L;

[0101] L2 is 20% to 40% of L;

[0102] L3 is 40% to 60% of L;

[0103] Wherein, L is the chord length of the blade 2; L1 is the chord length of the first damaged area 31 of the blade basin; L2 is the chord length of the first damaged area 41 of the blade back; L3 is the chord length of the damaged area 4 of the blade back. The blade 2 after spraying the anti-erosion coating meets the length conditions, which can play a protective role and greatly improve the anti-erosion capability of the blade disc body 1 while ensuring the aerodynamic performance and strength requirements of the blade disc body 1.

[0104] Figure 5 The schematic diagram showing the included angle between the first damaged area of the blade basin and the blade is shown. Figure 7 The schematic diagram showing the included angle between the first damaged area of the blade back and the blade is shown. Referring to Figure 5 、 6In some embodiments, the first damage area 31 of the blade disc, the first damage area 41 of the blade back and the second damage area 42 of the blade back after spraying the anti-erosion coating meet the following angle conditions:

[0105] a1° is 60°-80°;

[0106] a2° is 70°-90°;

[0107] a3° is 10°-40°;

[0108] a4° is 10°-40°;

[0109] a5° is 20°-40°;

[0110] a6° is 10°-30°;

[0111] Wherein, a1° is the angle between the first damage area 31 of the blade disc and the tip 22 of the blade 2; a2° is the angle between the second damage area 32 of the blade disc and the trailing edge 23 of the blade 2; a3° is the angle between the first damage area 31 of the blade disc and the leading edge 25 of the blade 2; a4° is the angle between the second damage area 32 of the blade disc and the hub 11 of the blade disc body 1; a5° is the angle between the first damage area 41 of the blade back and the tip 22 of the blade 2; a6° is the angle between the second damage area 42 of the blade back and the tip 22 of the blade 2. The blade 2 after spraying the anti-erosion coating meets the angle conditions, which can play a protective role, and can greatly improve the anti-erosion ability of the blade disc body 1 while ensuring the aerodynamic performance and strength requirements of the blade disc body 1.

[0112] In some embodiments, the first damage area 31 of the blade disc, the first damage area 41 of the blade back and the second damage area 42 of the blade back after spraying the anti-erosion coating meet the following rounding conditions:

[0113] R1 is 15-30 mm;

[0114] R2 is 10-30 mm;

[0115] Wherein, R1 is the rounding diameter of the first damage area 31 of the blade disc; R2 is the rounding diameter of the second damage area 32 of the blade disc. The blade 2 after spraying the anti-erosion coating meets the rounding conditions, which can play a protective role, and can greatly improve the anti-erosion ability of the blade disc body 1 while ensuring the aerodynamic performance and strength requirements of the blade disc body 1.

[0116] In some embodiments, the surface roughness of the anti-erosion coating is ≤Ra0.8μm, which ensures the aerodynamic performance of the blade disc body 1 and improves the anti-erosion ability of the blade disc body 1.

[0117] Figure 2A block diagram of a whole axial flow blade disc partition sand prevention system is shown. As shown in Figure 2 A whole axial flow blade disc partition sand prevention system comprises:

[0118] A cleaning module is configured to clean the blades 2 of the blade disc body 1 by ultrasonic waves and remove the oxide layer;

[0119] A region partition module is configured to partition the blade pan first damage area 31, the blade pan second damage area 32, the blade back first damage area 41, the blade back second damage area 42, the blade top damage area 5 and the undamaged area 6 on the blades 2 according to the damage difference of different areas of the blades 2;

[0120] An initial spraying module is configured to spray the anti-erosion coating on the blade pan first damage area 31 and the blade back first damage area 41; the spraying thickness is 6-10 μm; and the deposition speed is ≤1 μm / h;

[0121] A re-spraying module is configured to spray the anti-erosion coating on the blade pan second damage area 32, the blade back second damage area 42, the blade top damage area 5, and the blade pan first damage area 31 and the blade back first damage area 41 which have been sprayed with the anti-erosion coating; the spraying thickness is 6-10 μm; and the deposition speed is ≤1 μm / h;

[0122] A strengthening treatment module is configured to perform the strengthening treatment on the undamaged area 6;

[0123] An inspection module is configured to inspect the surface state of the anti-erosion coating, the adjacent anti-erosion coating and the transition between the anti-erosion coating and the undamaged area 6.

[0124] Embodiment 2

[0125] The embodiment performs a comparative experiment on the performance of the blade disc body 1 with the anti-erosion coating and the blade disc body 1 without the anti-erosion coating. The performance comparison table of the blade disc body 1 with the anti-erosion coating and the blade disc body 1 without the anti-erosion coating is shown in Table 1.

[0126]

[0127] Table 1

[0128] According to the performance comparison table of the blade disc body 1 with the anti-erosion coating and the blade disc body 1 without the anti-erosion coating, the anti-erosion performance of the blade 2 with the anti-erosion coating is improved by 3.6 times than that of the blade 2 without the anti-erosion coating, and the mechanical properties of the substrate are not affected, and the simulation results also show that the aerodynamic performance is not affected.

[0129] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood that modifications can be made to the foregoing embodiments, or additional implementations can be implemented, without departing from the spirit and scope of the inventive subject matter. Accordingly, the present application is not limited to the implementations described herein, but is intended to be defined by the claims set forth below, and equivalents thereof.

Claims

1. A method for zonal sand control of a monoblock axial flow vane disc, characterized in that, The method comprises the following steps: cleaning the blades (2) of the blade disc body (1) by ultrasonic waves and removing the oxide layer; dividing the blade basin first damage area (31), the blade basin second damage area (32), the blade back first damage area (41), the blade back second damage area (42), the blade top damage area (5) and the undamaged area on the blade (2) according to the damage difference of different areas of the blade (2); spraying the anti-erosion coating on the blade basin first damage area (31) and the blade back first damage area (41) in sections; the spraying thickness is 6-10 μm; the deposition speed is ≤1 μm / h; spraying the anti-erosion coating on the blade basin second damage area (32), the blade back second damage area (42), the blade top damage area (5) and the blade basin first damage area (31) and the blade back first damage area (41) sprayed with the anti-erosion coating in sections; the spraying thickness is 6-10 μm; the deposition speed is ≤1 μm / h; carrying out mechanical shot blasting or laser strengthening treatment on the undamaged area (6); checking the surface state of the anti-erosion coating; checking the adjacent anti-erosion coatings and the transition of the anti-erosion coating and the undamaged area (6).

2. The integral axial vane disc zonal sand control method of claim 1, wherein: The difference at the joint of the anti-erosion coatings of the blade basin first damage area (31) and the blade basin second damage area (32), the blade back first damage area (41) and the blade back second damage area (42), the blade top damage area (5) and the blade basin first damage area (31), the blade top damage area (5) and the blade back first damage area (41), the blade top damage area (5) and the blade basin second damage area (32), the blade top damage area (5) and the blade back second damage area (42) is ≤10 μm.

3. The integral axial vane disc zonal sand control method of claim 2, wherein: The abrasion degree of the blade basin first damage area (31) is greater than that of the blade basin second damage area (32) and the blade top damage area (5).

4. The integral axial vane disc zonal sand control method of claim 2, wherein: The abrasion degree of the blade back first damage area (41) is greater than that of the blade back second damage area (42) and the blade top damage area (5).

5. The integral axial vane disc zonal sand control method of claim 4, wherein: The blade basin second damage area (32), the blade back second damage area (42) and the undamaged area (6) sprayed with the anti-erosion coating after spraying the anti-erosion coating meet the following height conditions: H1 is 50%-70% of H; H2 is 50%-70% of H; H3 is 80%-95% of H; wherein, H is the height of the blade (2); H1 is the height of the blade basin second damage area (32); H2 is the height of the undamaged area (6); H3 is the height of the blade back second damage area (42).

6. The integral axial vane disc zoned sand control method of claim 4, wherein: The blade basin first damage area (31), the blade back first damage area (41) and the blade damage area (4) sprayed with the anti-erosion coating meet the following length conditions: L1 is 40%-60% of L; L2 is 20%-40% of L; L3 is 40%-60% of L; wherein, L is the chord length of the blade (2); L1 is the chord length of the blade basin first damage area (31); L2 is the chord length of the blade back first damage area (41); L3 is the chord length of the blade damage area (4).

7. The integral axial vane disc zoned sand control method of claim 4, wherein: The first damage area (31) of the blade disc, the first damage area (41) of the blade back and the second damage area (42) of the blade back after spraying the anti-erosion coating meet the following angle conditions: a1° is 60°-80°; a2° is 70°-90°; a3° is 10°-40°; a4° is 10°-40°; a5° is 20°-40°; a6° is 10°-30°; Wherein, a1° is the angle between the first damage area (31) of the blade disc and the tip (22) of the blade (2); a2° is the angle between the second damage area (32) of the blade disc and the trailing edge (23) of the blade (2); a3° is the angle between the first damage area (31) of the blade disc and the leading edge (25) of the blade (2); a4° is the angle between the second damage area (32) of the blade disc and the hub (11) of the blade disc body (1); a5° is the angle between the first damage area (41) of the blade back and the tip (22) of the blade (2); a6° is the angle between the second damage area (42) of the blade back and the tip (22) of the blade (2).

8. The integral axial vane disc zoned sand control method of claim 4, wherein: The first damage area (31) of the blade disc, the first damage area (41) of the blade back and the second damage area (42) of the blade back after spraying the anti-erosion coating meet the following rounding conditions: R1 is 15-30 mm; R2 is 10-30 mm; Wherein, R1 is the rounding diameter of the first damage area (31) of the blade disc; R2 is the rounding diameter of the second damage area (32) of the blade disc.

9. The integral axial vane disc zoned sand control method of any one of claims 1-8, wherein: The surface roughness of the anti-erosion coating is ≤Ra0.8 μm.

10. A zonal sand control system for a monoblock axial flow vane disc, characterized by, It comprises: A cleaning module for cleaning the blade (2) of the blade disc body (1) by ultrasonic waves and removing the oxide layer; A region division module for dividing the first damage area (31) of the blade disc, the second damage area (32) of the blade disc, the first damage area (41) of the blade back, the second damage area (42) of the blade back, the tip damage area (5) and the undamaged area (6) on the blade (2) according to the damage difference of different areas of the blade (2); An initial spraying module for spraying the anti-erosion coating on the first damage area (31) of the blade disc and the first damage area (41) of the blade back; the spraying thickness is 6 μm-10 μm; the deposition speed is ≤1 μm / h; A re-spraying module for spraying the anti-erosion coating on the second damage area (32) of the blade disc, the second damage area (42) of the blade back, the tip damage area (5) and the first damage area (31) of the blade disc and the first damage area (41) of the blade back which have been sprayed with the anti-erosion coating; the spraying thickness is 6 μm-10 μm; the deposition speed is ≤1 μm / h; A strengthening treatment module for strengthening the undamaged area (6); An inspection module for inspecting the surface state of the anti-erosion coating, the adjacent anti-erosion coating and the transition of the anti-erosion coating and the undamaged area (6).

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