Corrosion-resistant steam turbine blade

Abstract

A corrosion-resistant steam turbine blade comprises a blade root. The top of the blade root is integrally connected with an outer blade, a filling groove is formed in the outer blade, the filling groove is filled with an inner blade, and the outer wall of the inner blade is in clearance fit with the filling groove; a through hole is formed along the bottom of the inner blade and is communicated with the overflow hole; an overflow hole is formed in the outer blade along the through hole of the inner blade; a liquid conveying hole is transversely formed in the blade root and is in liquid supply butt joint with a through hole formed in the bottom of the inner blade. According to the corrosion-resistant steam turbine blade capable of autonomously diffusing corrosion-resistant protective liquid along with rotating centrifugal force, maintenance of the corrosion-resistant blade supplied internally and externally is completed through a combined structure of the inner blade and the outer blade, and meanwhile maintenance and replacement of the inner blade and the outer blade can be completed in a targeted mode so that the service life of the blade can be prolonged; and the cost is saved. And meanwhile, a real-time maintenance structure in the use process can reduce the maintenance period and the maintenance labor cost.

Description

Technical Field

[0001] The utility model belongs to the technical field, and specifically relates to a corrosion-resistant steam turbine blade. Background Art

[0002] Steam turbines and compressors operate in harsh environments such as high temperature, high humidity, high salt spray, and solid particle erosion for a long time. The protection of key components such as blades and rotors has received extensive attention. At present, phosphate metal aluminum powder coatings are usually used to protect the blades and rotors of steam turbines and industrial compressors.

[0003] Therefore, the present application adopts a corrosion-resistant steam turbine blade that can autonomously diffuse corrosion-resistant protective liquid with the centrifugal force of rotation. The blade is a combination of inner and outer blades to complete the maintenance of the corrosion-resistant blades. At the same time, the maintenance and replacement of the inner and outer blades can be completed in a targeted manner to extend the service life of the blades and save costs. At the same time, the real-time maintenance structure during use can reduce the maintenance cycle and maintenance labor costs. Summary of the invention

[0004] In order to achieve the above object, the technical solution of the utility model is as follows:

[0005] A corrosion-resistant steam turbine blade, comprising a blade root; an outer blade is integrally connected to the top of the blade root, a filling groove is built into the outer blade, an inner blade is filled in the filling groove, and an outer wall of the inner blade is gap-matched with the filling groove;

[0006] The inner blade is provided with a through hole along the bottom, and the through hole is connected with the overflow hole;

[0007] The outer blades are provided with overflow holes along the positions of the through holes of the inner blades;

[0008] The blade root is transversely provided with an infusion hole, and the infusion hole is connected with the through hole provided along the bottom of the inner blade for liquid supply.

[0009] Furthermore, the outer blades are provided with drainage grooves along both sides of the overflow hole.

[0010] Furthermore, a bottle head is inserted into the infusion hole, and the bottle head is filled with corrosion-resistant filling liquid. A screw joint is retained on the outer ring of the infusion end at the root of the bottle head, and the screw joint is screwed to the inner part of the infusion hole.

[0011] Furthermore, the inner blade body is provided with three groups of second mounting holes, and the outer blade body is provided with three groups of first mounting holes along the mounting positions of the second mounting holes;

[0012] Countersunk wedges are synchronously inserted into the first mounting hole and the second mounting hole.

[0013] Furthermore, the countersunk wedge includes a wedge head and a packaging sheet; each group of wedge heads is inserted into the corresponding first mounting hole and second mounting hole, a packaging sheet is installed on the top of the wedge head, a protrusion is retained at the bottom of the packaging sheet, and the groove on the top of the wedge head is adhered to the protrusion.

[0014] The beneficial effects of the utility model are:

[0015] Compared with the prior art, the present application adopts a corrosion-resistant steam turbine blade that can autonomously diffuse corrosion-resistant protective liquid with the centrifugal force of rotation. The blade is a combination of inner and outer blades to complete the maintenance of the corrosion-resistant blades inside and outside. At the same time, the maintenance and replacement of the inner and outer blades can be completed in a targeted manner to extend the service life of the blades and save costs. At the same time, the real-time maintenance structure during use can reduce the maintenance cycle and maintenance labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a corrosion-resistant steam turbine blade.

[0017] Figure 2 This is a partial cross-sectional view of a corrosion-resistant steam turbine blade of the utility model.

[0018] List of Figure Symbols:

[0019] 1 is the outer blade, 2 is the first mounting hole, 3 is the drainage groove, 4 is the countersunk wedge, 5 is the blade root, 6 is the infusion hole, 8 is the bottle head, 9 is the screw joint, 10 is the overflow hole, 11 is the inner blade, 12 is the second mounting hole, 13 is the packaging sheet, 14 is the start, 15 is the wedge head, and 16 is the filling groove. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. It should be understood that the following specific implementations are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0021] like Figure 1 and Figure 2 As shown, a corrosion-resistant steam turbine blade includes a blade root; the top of the blade root 5 is integrally connected to an outer blade 1, the outer blade 1 has a filling groove 16 built in, the filling groove 16 is filled with an inner blade 11, and the outer wall of the inner blade 11 is in clearance with the filling groove 16; wherein, the inner blade 11 can be installed in the filling groove 16 of the outer blade 1, and the inner blade 11 is a channel structure for supplying corrosion-resistant liquid internally. Since the interior of the channel needs to be cleaned and replaced, the installation structure of the inner blade 11 can be freely replaced without delaying the normal use of the blade. Since the holes need to be aligned, the manufacturing precision of the inner blade 11 and the outer blade 1 is relatively high.

[0022] The inner blade 11 is provided with a through hole along the bottom, and the through hole is connected to the overflow hole 10; the outer blade 1 is provided with an overflow hole 10 along the position of the through hole of the inner blade 11; wherein, the two groups of overflow holes 10 are located at the same position, and the corrosion-resistant liquid can be gradually seeped out by centrifugal force, so as to adhere to the surface of the outer blade 1 to form a corrosion-resistant protective layer.

[0023] The blade root 5 is laterally provided with an infusion hole 6, which is connected to the through hole provided along the bottom of the inner blade 11. The infusion hole 6 can be subsequently installed with a bottle head 8, and a certain amount of corrosion-resistant liquid is retained inside the bottle head 8, which can be continuously supplied and used during the use period and protect the outer blade 1.

[0024] like Figure 1 and Figure 2 As shown, the outer blade 1 is provided with drainage grooves 3 along both sides of the overflow hole 10. The drainage grooves 3 can assist the drainage of the corrosion-resistant liquid to ensure that the corrosion-resistant liquid covers the outer blade 1 in multiple directions.

[0025] like Figure 1 and Figure 2 As shown, a bottle head 8 is inserted into the infusion hole 6, and the bottle head 8 is filled with corrosion-resistant filling liquid. A screw joint 9 is retained on the outer ring of the infusion end at the root of the bottle head 8, and the screw joint 9 is screwed to the infusion hole 6. The bottle head 8 is inserted into the infusion hole 6, and the connection structure is further reinforced by the screw joint 9 of the infusion end to ensure stable supply of corrosion-resistant liquid.

[0026] like Figure 1 and Figure 2 As shown, the inner blade 11 has three groups of second mounting holes 12, and the outer blade 1 has three groups of first mounting holes 2 along the mounting positions of the second mounting holes 12; countersunk wedges 4 are synchronously inserted into the first mounting holes 2 and the second mounting holes 12. The first mounting holes 2 and the second mounting holes 12 in the same group jointly restrict a group of countersunk wedges 4, and the inner blade 11 is fixed in the built-in filling groove 16 of the outer blade 1 through the countersunk wedges 4.

[0027] like Figure 1 and Figure 2 As shown, the countersunk wedge block 4 includes a wedge block head 15 and a packaging sheet 13; each group of wedge block heads 15 is inserted into the corresponding first mounting hole 2 and second mounting hole 12, and a packaging sheet 13 is installed on the top of the wedge block head 15, and a protrusion 14 is retained at the bottom of the packaging sheet 13, and the top groove of the wedge block head 15 is adhered to the protrusion 14. Among them, the wedge block head 15 serves as a limiting plug-in main structure to install the wedge block of the countersunk structure into the first mounting hole 2 and the second mounting hole 12. At the same time, in order to further fix the installation position of the wedge block head 15, the present application adopts a structure in which the packaging sheet 13 cooperates with the protrusion 14, which expands the adhesion area, thereby further enhancing the installation stability of the countersunk wedge block 4.

[0028] It should be noted that the above content only illustrates the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications all fall within the protection scope of the claims of the utility model.

Claims

1. A corrosion-resistant steam turbine blade, comprising a blade root; wherein: The top of the blade root (5) is integrally connected to an outer blade (1), the outer blade (1) is internally provided with a filling groove (16), the filling groove (16) is filled with an inner blade (11), and an outer wall of the inner blade (11) is clearance-matched with the filling groove (16); The inner blade (11) is provided with a through hole along the bottom, and the through hole is connected to the overflow hole (10); The outer blade (1) is provided with an overflow hole (10) along the through hole of the inner blade (11); The blade root (5) is provided with a liquid infusion hole (6) in the transverse direction, and the liquid infusion hole (6) is connected to a through hole provided along the bottom of the inner blade (11) for liquid supply.

2. The corrosion-resistant steam turbine blade according to claim 1, characterized in that: The outer blade (1) is provided with drainage grooves (3) along both sides of the overflow hole (10).

3. The corrosion-resistant steam turbine blade according to claim 1, characterized in that: A bottle head (8) is inserted into the infusion hole (6), and the bottle head (8) is filled with corrosion-resistant filling liquid. A screw joint (9) is retained on the outer ring of the infusion end at the root of the bottle head (8), and the screw joint (9) is internally screwed to the infusion hole (6).

4. The corrosion-resistant steam turbine blade according to claim 1, characterized in that: The inner blade (11) is provided with three groups of second mounting holes (12) on its blade body, and the outer blade (1) is provided with three groups of first mounting holes (2) along the mounting positions of the second mounting holes (12); Countersunk wedges (4) are synchronously inserted into the first mounting hole (2) and the second mounting hole (12).

5. The corrosion-resistant steam turbine blade according to claim 4, characterized in that: The countersunk wedge (4) comprises a wedge head (15) and a packaging sheet (13); each group of wedge heads (15) is inserted into the corresponding first mounting hole (2) and second mounting hole (12); a packaging sheet (13) is installed on the top of the wedge head (15); a protrusion (14) is retained on the bottom of the packaging sheet (13); and the groove on the top of the wedge head (15) is adhered to the protrusion (14).

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