Corrosion process shielding clamp for gas turbine blade

Abstract

The invention provides a corrosion process shielding clamp for gas turbine blades, which is simple and quick to use, can improve the production efficiency and has good shielding property on corrosive liquid. The blade crown protecting block comprises a blade crown protecting block body and a blade root protecting block body, the blade crown protecting block body comprises a blade crown inner arc protecting block body and a blade crown back arc protecting block body, and the blade crown inner arc protecting block body and the blade crown back arc protecting block body are in Haff connection through a first tension bolt and are spliced to form a blade crown protecting cavity. A cavity body of the blade crown protection cavity is matched with the blade crown, and a gap is reserved between the cavity wall of the blade crown protection cavity and the blade crown. The blade root protection block comprises a blade root inner arc protection block and a blade root back arc protection block, the blade root inner arc protection block and the blade root back arc protection block are in Haff connection through a second draw-in bolt and are spliced to form a blade root protection cavity, and a gap is formed between the cavity wall of the blade root protection cavity and the blade root; and a cavity body of the blade root protection cavity is matched with the blade crown.

Description

Technical Field

[0001] The invention relates to the technical field of tooling fixtures, and in particular to a corrosion process shielding fixture for combustion engine blades. Background Art

[0002] like Figure 1 A gas turbine blade is shown, which includes a blade body 13, a blade crown 12 is arranged at the top of the blade body, and a blade root 14 is arranged at the bottom of the blade body 13. There is a corrosion process in the processing of the gas turbine blade, which needs to be corroded by a corrosion liquid mixed with ferric chloride, hydrochloric acid and nitric acid. Since the blade crown and the blade root have been machined to the required size, they need to be shielded during the corrosion process of the blade body to prevent them from being corroded and damaging the product precision.

[0003] A common method of masking the corrosive liquid on leaf crowns and roots is to apply peelable masking glue to the masking area, and then wait for the peelable masking glue to solidify to form a masking layer. The solidification time of the peelable masking glue takes at least eight hours. After the corrosion is completed, the peelable masking glue needs to be torn off, which greatly reduces production efficiency. Summary of the invention

[0004] In view of the disadvantage that the existing corrosion process masking method for gas turbine blades requires waiting at least eight hours for the peelable masking glue to solidify, which greatly reduces the production efficiency, the present invention provides a corrosion process masking fixture for gas turbine blades, which is simple and quick to use, can improve production efficiency, and has good shielding properties against corrosive liquid.

[0005] A corrosion process shielding fixture for a gas turbine blade, characterized in that it includes a blade crown protection block and a blade root protection block, the blade crown protection block includes a blade crown inner arc protection block and a blade crown back arc protection block, the blade crown inner arc protection block and the blade crown back arc protection block are connected by a first tightening bolt, the blade crown inner arc protection block and the blade crown back arc protection block are assembled to form a blade crown protection cavity, the cavity body of the blade crown protection cavity matches the blade crown, and a spacing is left between the cavity wall of the blade crown protection cavity and the blade crown; the blade root protection block includes a blade root inner arc protection block and a blade root back arc protection block, the blade root inner arc protection block and the blade root back arc protection block are connected by a second tightening bolt, the blade root inner arc protection block and the blade root back arc protection block are assembled to form a blade root protection cavity, there is a spacing between the cavity wall of the blade root protection cavity and the blade root, and the cavity body of the blade root protection cavity matches the blade crown.

[0006] It is further characterized by: The half surface edges of the blade crown protection block and the blade root protection block are both provided with grooves; The blade crown protection cavity, the blade root protection cavity and the groove are filled with foamed silica gel strips; There are at least two first tension bolts, which are respectively installed at two ends of the blade crown protection block; there are at least two second tension bolts, which are respectively installed at two ends of the blade root protection block; the two ends of the blade crown protection block and the blade root protection block are recessed toward the half surface to form a fixing groove; The materials of the blade crown protection block, the blade root protection block, the first tension bolt, and the second tension bolt are all acid-resistant resin.

[0007] After adopting the present invention, the blade crown protection block and the blade root protection block can block the corrosive liquid and ensure a higher shielding property of the corrosive liquid. During installation, it is only necessary to assemble the blade crown inner arc protection block and the blade crown back arc protection block, assemble the blade root inner arc protection block and the blade root back arc protection block, and then screw on the first tightening bolt and the second tightening bolt to complete the installation. After the corrosion process is completed, the first tightening bolt and the second tightening bolt can be screwed off to complete the disassembly. The use process is simple and fast, which greatly improves the production efficiency. The blade crown protection block, the blade root protection block, the first tightening bolt, and the second tightening bolt are all made of acid-resistant resin to prevent the fixture itself from being corroded by the corrosive liquid, and further ensure a higher shielding property of the corrosive liquid. The blade crown protection cavity, the blade root protection cavity, and the groove are filled with foamed silicone strips, the material of which will not be corroded by the corrosive liquid, and at the same time, the sealing of the blade crown protection block and the blade root protection block can be improved, and the shielding property of the corrosive liquid is improved from the perspective of improving the sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the gas turbine blade; Figure 2 It is a schematic diagram of the axonometric view of the present invention; Figure 3 A schematic diagram of a front view of a blade root protection block of the present invention; Figure 4 It is a schematic diagram of a blade root protection block of the present invention from the left side; Figure 5 It is a schematic diagram of the front view of the leaf crown protection block of the present invention; Figure 6 It is a schematic diagram of the blade crown protection block of the present invention from the left side. DETAILED DESCRIPTION

[0009] See Figures 2 to 6 A corrosion process masking fixture for a combustion engine blade includes a blade crown protection block 15 and a blade root protection block 16. The blade crown protection block 15 includes a blade crown inner arc protection block 4 and a blade crown back arc protection block 3. The blade crown inner arc protection block 4 and the blade crown back arc protection block 3 are connected by a first tightening bolt 5. The blade crown inner arc protection block 4 and the blade crown back arc protection block 3 are assembled to form a blade crown protection cavity 7. The cavity of the blade crown protection cavity 7 matches the blade crown 12 and plays a role in positioning the blade crown 12.

[0010] There is a gap between the cavity wall of the blade crown protection cavity 7 and the blade crown 12; the blade root protection block 16 includes a blade root inner arc protection block 1 and a blade root back arc protection block 2, which are connected by a second tension bolt 9, and the blade root inner arc protection block 1 and the blade root back arc protection block 2 are assembled to form a blade root protection cavity 17. The cavity body of the blade root protection cavity 17 matches the blade root 14, and plays a role in positioning the blade root 14. There is a gap between the cavity wall of the blade root protection cavity 17 and the blade root 14.

[0011] There are at least two first tension bolts 5, which are respectively installed at the two ends of the blade crown protection block 15, and there are at least two second tension bolts 9, which are respectively installed at the two ends of the blade root protection block 16. The two ends of the blade crown protection block 15 and the blade root protection block 16 are recessed toward the half surface to form a fixing groove, which plays a fixing role for the first tension bolt 5 and the second tension bolt 9, thereby preventing the first tension bolt 5 and the second tension bolt 9 from shaking.

[0012] The distance between the cavity wall of the blade crown protection cavity 7 and the blade crown 12 and the distance between the cavity wall of the blade root protection cavity 17 and the blade root 14 are 1-2 mm, and preferably 1 mm in this embodiment.

[0013] The half surface edges of the blade crown protection block 15 and the blade root protection block 16 are both provided with grooves 8, the width of the groove 8 is 4-5 mm, and the depth is 7-9 mm. In this embodiment, the width is preferably 4.5 mm, and the depth is 8 mm.

[0014] The blade crown protection cavity 7 , the blade root protection cavity 17 and the groove 8 are filled with foamed silicone strips 11 , the material of which will not be corroded by the corrosive liquid and can improve the sealing performance of the blade crown protection block 15 and the blade root protection block 16 .

[0015] The materials of the blade crown protection block 15, the blade root protection block 16, the first tension bolt 5, and the second tension bolt 9 are all acid-resistant resins, which can prevent the fixture itself from being corroded by corrosive liquid.

[0016] When in use, it is only necessary to assemble the inner arc protection block 4 of the blade crown and the back arc protection block 3 of the blade crown at the blade crown 12, and tighten the first tensioning bolt 5 and the first nut 6 to complete the installation of the blade crown protection block 15, and assemble the inner arc protection block 1 of the blade root and the back arc protection block 2 of the blade root at the blade root 14, and tighten the second tensioning bolt 9 and the second nut 10 to complete the installation of the blade root protection block 16. After the corrosion process is completed, the first tensioning bolt 5, the first nut 6, the second tensioning bolt 9 and the second nut 10 can be unscrewed to disassemble the blade crown protection block 15 and the blade root protection block 16. The entire installation and disassembly process of the present invention is convenient and quick, greatly improves the production efficiency, and has good shielding properties against the corrosion liquid.

[0017] In the figure, 6 is a first nut and 10 is a second nut.

Claims

1. A corrosion process masking fixture for gas turbine blades, characterized in that: It includes a blade crown protection block and a blade root protection block, the blade crown protection block includes a blade crown inner arc protection block and a blade crown back arc protection block, the blade crown inner arc protection block and the blade crown back arc protection block are connected by a first tightening bolt, the blade crown inner arc protection block and the blade crown back arc protection block are assembled to form a blade crown protection cavity, the cavity body of the blade crown protection cavity matches the blade crown, and a spacing is left between the cavity wall of the blade crown protection cavity and the blade crown; the blade root protection block includes a blade root inner arc protection block and a blade root back arc protection block, the blade root inner arc protection block and the blade root back arc protection block are connected by a second tightening bolt, the blade root inner arc protection block and the blade root back arc protection block are assembled to form a blade root protection cavity, there is a spacing between the cavity wall of the blade root protection cavity and the blade root, and the cavity body of the blade root protection cavity matches the blade crown.

2. The corrosion process masking fixture for gas turbine blades according to claim 1 is characterized in that: The half surface edges of the blade crown protection block and the blade root protection block are both provided with grooves.

3. The corrosion process masking fixture for gas turbine blades according to claim 2 is characterized in that: The blade crown protection cavity, the blade root protection cavity and the groove are filled with foamed silicone strips.

4. The corrosion process masking fixture for gas turbine blades according to claim 3 is characterized in that: There are at least two first tensioning bolts, which are respectively installed at the two ends of the blade crown protection block, and there are at least two second tensioning bolts, which are respectively installed at the two ends of the blade root protection block. The two ends of the blade crown protection block and the blade root protection block are recessed toward the half surface to form a fixing groove.

5. The corrosion process masking fixture for gas turbine blades according to claim 4 is characterized in that: The materials of the blade crown protection block, the blade root protection block, the first tension bolt, and the second tension bolt are all acid-resistant resin.

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