A main shaft device for a gas turbine

Abstract

The application relates to the technical field of gas turbine main shafts, and discloses a main shaft device for a gas turbine, which comprises a dismounting mechanism, the outer portion of the dismounting mechanism is provided with a protection mechanism, the dismounting mechanism comprises a main shaft, the outer portion of the main shaft is fixedly connected with a mounting block, a first threaded hole is formed in one end of the mounting block, a sliding groove is formed in one end of the mounting block, a sliding block is movably connected to one end of the sliding groove, a second threaded hole is formed in one end of the sliding block, a rotating shaft is arranged at one end of the mounting block, the outer portion of the rotating shaft is provided with a fixing block, a third threaded hole is formed in one end of the fixing block, and the outer wall of the fixing block is attached to the mounting block; the main shaft device for the gas turbine is convenient to use, the turbine blade can be conveniently installed and dismounted through the dismounting mechanism, the mounting block is welded to the outer portion of the main shaft, the integrity of the main shaft is not damaged, and compared with the threaded hole and the open slot, the strength rigidity is better.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas turbine main shafts, and particularly relates to a main shaft device for a gas turbine. BACKGROUND

[0002] The gas turbine is an internal combustion power machine taking continuous flow gas as working medium to drive the impeller to rotate at high speed and convert the energy of fuel into useful work, and is a rotary impeller type heat engine, wherein the main shaft device is one of key components of the gas turbine.

[0003] In the design process of the main shaft device, the convenience of turbine blade disassembly and assembly needs to be considered. The public number CN213360816U discloses a main shaft device for a gas turbine, which comprises a main shaft in a stepped shape, an opening slot is formed on the main shaft along the length direction, the opening slots are uniformly arranged along the circumferential direction of the main shaft, a plurality of threaded holes are uniformly formed in the opening slots along the length direction, and the threaded holes are used for fixed installation of turbine blades. The main shaft device for the gas turbine has simple structure and can realize free disassembly and assembly of the turbine blades.

[0004] However, this technology opens threaded holes and opening slots on the main shaft structure, which destroys the integrity of the main shaft structure and reduces the strength and rigidity of the main shaft to some extent. SUMMARY

[0005] In view of the above technical deficiencies, the application provides a main shaft device for a gas turbine, which is convenient for installation of turbine blades and adopts a welding mounting block mode without damaging the integrity of the main shaft, and has better strength and rigidity compared with the mode of opening threaded holes and opening slots.

[0006] The purpose of the application is achieved as follows:

[0007] The main shaft device for the gas turbine comprises a disassembly and assembly mechanism and a protection mechanism, and the disassembly and assembly mechanism is externally provided with the protection mechanism.

[0008] When the turbine blade needs to be disassembled and assembled, the turbine blade is conveniently disassembled and assembled through the disassembly and assembly mechanism, and the main shaft is then anticorrosion treated through the protection mechanism, so that the operation of conveniently installing the turbine blade and anticorrosion treatment is completed.

[0009] The disassembly and assembly mechanism comprises a main shaft, a mounting block, a first threaded hole, a sliding block, a second threaded hole, a rotating shaft and a fixing block, the outer portion of the main shaft is fixedly connected with the mounting block, one end of the mounting block is provided with the first threaded hole, one end of the mounting block is provided with a sliding groove, one end of the sliding groove is movably connected with the sliding block, one end of the sliding block is provided with the second threaded hole, one end of the mounting block is provided with the rotating shaft, the outer portion of the rotating shaft is provided with the fixing block, and one end of the fixing block is provided with a third threaded hole.

[0010] When the turbine blade needs to be installed, at this time, the mounting block is welded outside the main shaft, then the turbine blade mounting end is placed in the groove of the mounting block, then the slider in the sliding groove is slid to make the sliders on both sides fit, thereby preliminarily fixing the turbine blade with the sliders, then the size of the two sliders is adapted to the size of the mounting block, thereby the turbine blade can be fixed and installed by the bolts passing through the second threaded hole and the first threaded hole, then the fixed block is rotated with the shaft, the two ends of the fixed block are respectively fitted with the outer walls of the mounting block and the slider, and the fixed block is fixed on the outer wall of the slider through the third threaded hole, and the slider is fixed to avoid shaking, and when disassembled, only the bolts need to be removed, thereby the operation of installing and disassembling the turbine blade is completed, and the effect of convenient disassembly is achieved.

[0011] The protection mechanism comprises a corrosion-resistant coating, a galvanized layer and a polyethylene coating, the outer part of the corrosion-resistant coating is provided with the galvanized layer, and the outer part of the galvanized layer is provided with the polyethylene coating.

[0012] When protection is needed, the polyethylene coating on the outermost layer protects the galvanized layer and preliminarily protects the main shaft from corrosion, after the polyethylene coating is damaged, the galvanized layer forms a dense oxide film with air to protect the main shaft for the second time, and after the galvanized layer is damaged, the corrosion-resistant coating protects the main shaft from corrosion, thereby the operation of protecting the main shaft is completed, and the service life of the main shaft is improved.

[0013] Preferably, the mounting block is provided with a plurality of mounting blocks arranged in a ring array.

[0014] Through the above technical solution, the plurality of mounting blocks are arranged in a ring array, thereby the plurality of turbine blades can be better installed.

[0015] Preferably, the mounting block is provided with a plurality of first threaded holes arranged in a rectangular array.

[0016] Through the above technical solution, the mounting block is provided with a plurality of first threaded holes arranged in a rectangular array, thereby the mounting effect is better.

[0017] Preferably, the sliding groove is provided with a plurality of sliding grooves arranged at the top and the bottom of one end of the slider.

[0018] Preferably, the slider is provided with a plurality of sliders with a size adapted to half the size of the mounting block.

[0019] Preferably, the second threaded hole is provided with a plurality of second threaded holes arranged in a rectangular array.

[0020] Preferably, the anticorrosive coating is arranged on the outer part of the main shaft, and the fixing block is attached to the outer wall of the mounting block.

[0021] Advantages:

[0022] Firstly, the turbine blade is preliminarily fixed by the sliding blocks through the sliding of the sliding blocks in the sliding grooves, and then the turbine blade is fixed and mounted by the two sliding blocks through the bolts passing through the second threaded holes and the first threaded holes. When disassembling, only the bolts need to be removed, thereby completing the operation of mounting and disassembling the turbine blade, achieving the effect of convenient mounting and dismounting, not damaging the integrity of the main shaft, and having better strength and rigidity compared with the threaded hole and the open slot.

[0023] Secondly, the outermost polyethylene coating protects the galvanized layer and preliminarily protects the main shaft from corrosion, and then the galvanized layer forms a dense oxide film with the air to protect the main shaft for the second time. When the polyethylene coating is damaged, the galvanized layer is damaged, and then the anticorrosive coating protects the main shaft from corrosion, thereby completing the operation of protecting the main shaft and improving the service life of the main shaft. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective view of the dismounting mechanism of the application;

[0025] Figure 2 It is a perspective view of the mounting block of the application;

[0026] Figure 3 It is a sectional view of the application;

[0027] Figure 4 It is a sectional view of the protection mechanism of the application;

[0028] Figure 5 It is an enlarged view of A of the application.

[0029] Wherein: 1, dismounting mechanism; 2, protection mechanism; 11, main shaft; 12, mounting block; 13, first threaded hole; 14, sliding block; 15, second threaded hole; 16, rotating shaft; 17, fixing block; 21, anticorrosive coating; 22, galvanized layer; 23, polyethylene coating. DETAILED DESCRIPTION

[0030] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings.

[0031] The main shaft device for gas turbine in the specific embodiment, as shown in a kind of main shaft device for gas turbine, comprising: dismounting mechanism 1 and protection mechanism 2, dismounting mechanism 1 outside is provided with protection mechanism 2; Figures 1-5

[0032] When the turbine blade needs to be disassembled, the turbine blade is disassembled through the dismounting mechanism 1 at this time, and the main shaft 11 is then anticorrosion through the protection mechanism 2, so that the operation of conveniently installing the turbine blade and anticorrosion is completed.

[0033] The dismounting mechanism 1 comprises a main shaft 11, a mounting block 12, a first threaded hole 13, a sliding block 14, a second threaded hole 15, a rotating shaft 16 and a fixing block 17, the outer part of the main shaft 11 is fixedly connected with the mounting block 12, one end of the mounting block 12 is provided with the first threaded hole 13, one end of the mounting block 12 is provided with a sliding groove, one end of the sliding block 14 movably connected with the sliding groove, one end of the sliding block 14 is provided with the second threaded hole 15, the mounting block 12 is provided with the rotating shaft 16 at one end, the outer part of the rotating shaft 16 is provided with the fixing block 17, and one end of the fixing block 17 is provided with a third threaded hole.

[0034] When the turbine blade needs to be installed, the mounting block 12 is welded on the outer part of the main shaft 11 at this time, then the turbine blade installation end is placed in the recess of the mounting block 12, then the sliding block 14 in the sliding groove is slid to make the two sliding blocks 14 adhere to each other, so that the sliding block 14 preliminarily fixes the turbine blade, then the sizes of the two sliding blocks 14 are matched with the size of the mounting block 12, so that the turbine blade can be fixedly installed by the bolt passing through the second threaded hole 15 and the first threaded hole 13, then the fixing block 17 is rotated by the rotating shaft 16, so that the two ends of the fixing block 17 respectively adhere to the outer walls of the mounting block 12 and the sliding block 14, and the fixing block 17 is fixed on the outer wall of the sliding block 14 through the third threaded hole, and the sliding block 14 is fixed to avoid the shaking of the sliding block 14, and when disassembled, only the bolt needs to be removed, so that the operation of installing and disassembling the turbine blade is completed, the effect of convenient disassembly is achieved, destructive operation is not needed for the main shaft 11, and the strength of the main shaft 11 is guaranteed.

[0035] The protection mechanism 2 comprises a corrosion-resistant coating 21, a galvanized layer 22 and a polyethylene coating 23, the outer part of the corrosion-resistant coating 21 is provided with the galvanized layer 22, and the outer part of the galvanized layer 22 is provided with the polyethylene coating 23.

[0036] When protection is needed, the outermost polyethylene coating 23 protects the galvanized layer 22 and preliminarily anticorrosion protects the main shaft 11 at this time, after the polyethylene coating 23 is damaged, the galvanized layer 22 forms a dense oxide film with air to secondarily protect the main shaft 11, and after the galvanized layer 22 is damaged, the corrosion-resistant coating 21 is used to anticorrosion protect the main shaft 11, so that the operation of protecting the main shaft 11 is completed, and the effect of improving the service life of the main shaft 11 is achieved.

[0037] ​Specifically, the mounting block 12 is provided with a plurality of mounting blocks 12 arranged in a ring array.

[0038] Through the above technical solution, by arranging the plurality of mounting blocks 12 in a ring array, the plurality of turbine blades can be better installed.

[0039] Specifically, the mounting block 12 is provided with a plurality of mounting blocks 12 arranged in a ring array.

[0040] Through the above technical solution, by arranging the plurality of mounting blocks 12 in a ring array, the plurality of turbine blades can be better installed.

[0041] Specifically, the sliding groove is provided with a plurality of sliding grooves, and the plurality of sliding grooves are respectively arranged at the top and bottom of one end of the sliding block 14.

[0042] Through the above technical solution, by arranging the plurality of sliding grooves respectively at the top and bottom of one end of the sliding block 14, the sliding block 14 can be better moved.

[0043] Specifically, the sliding block 14 is provided with a plurality of sliding blocks 14, and the plurality of sliding blocks 14 are adapted in size to half the size of the mounting block 12.

[0044] Through the above technical solution, by arranging the plurality of sliding blocks 14 in size to half the size of the mounting block 12, the sliding blocks 14 combined together can be consistent in size with the mounting block 12, and the turbine blades can be better fixed.

[0045] Specifically, the second threaded hole 15 is provided with a plurality of second threaded holes 15 arranged in a rectangular array.

[0046] Through the above technical solution, by arranging the plurality of second threaded holes 15 in a rectangular array, the second threaded hole 15 is opposite to the first threaded hole 13, and the mounting block 12 and the sliding block 14 can be connected and fixed.

[0047] Specifically, the corrosion-resistant coating 21 is arranged on the outside of the main shaft 11, and the fixing block 17 is attached to the outer wall of the mounting block 12.

[0048] Through the above technical solution, by arranging the corrosion-resistant coating 21 on the outside of the main shaft 11, the main shaft 11 can be protected, and by attaching the fixing block 17 to the outer wall of the mounting block 12, the fixing block 17 can better fix the mounting block 12 and the sliding block 14.

[0049] In use, the mounting block 12 is welded to the outside of the main shaft 11, and the turbine blade mounting end is placed in the groove of the mounting block 12. The slider 14 in the sliding groove makes the sliders on both sides fit together, thus initially fixing the turbine blade. The size of the two sliders 14 is adapted to the size of the mounting block 12, and the turbine blade is fixed by bolts passing through the second threaded hole 15 and the first threaded hole 13. The fixing block 17 is rotated by the rotating shaft 16, so that the two ends of the fixing block 17 fit with the outer wall of the mounting block 12 and the slider 14 respectively. The fixing block 17 is fixed to the outer wall of the slider 14 through the third threaded hole. At the same time, the slider 14 is fixed to prevent the slider 14 from shaking. Disassembly can be completed by simply removing the bolts, thus completing the installation and disassembly of the turbine blade, achieving the effect of convenient installation and disassembly.

[0050] It should be noted that, although specific embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these specific embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A main shaft assembly for a gas turbine, comprising: The disassembly and assembly mechanism (1) and the protective mechanism (2) are characterized in that: the disassembly and assembly mechanism (1) is provided with a protective mechanism (2) on its exterior; The disassembly and assembly mechanism (1) includes: a main shaft (11), a mounting block (12), a first threaded hole (13), a slider (14), a second threaded hole (15), a rotating shaft (16), and a fixing block (17). The mounting block (12) is welded to the outside of the main shaft (11). The mounting block (12) has a first threaded hole (13) at one end and a sliding groove at one end. The slider (14) is movably connected to one end of the sliding groove. The second threaded hole (15) is opened at one end of the slider (14). The rotating shaft (16) is installed at one end of the mounting block (12). The fixing block (17) is provided on the outside of the rotating shaft (16). The fixing block (17) has a third threaded hole at one end. The protective mechanism (2) includes: an anti-corrosion coating (21), a galvanized layer (22) and a polyethylene coating (23), wherein the anti-corrosion coating (21) is provided with a galvanized layer (22) on the outside, and the galvanized layer (22) is provided with a polyethylene coating (23) on the outside; Multiple mounting blocks (12) are provided, and the multiple mounting blocks (12) are arranged in a ring array; The mounting block (12) is concave, and multiple first threaded holes (13) are provided, with the multiple first threaded holes (13) arranged in a rectangular array. Multiple second threaded holes (15) are provided, and the multiple second threaded holes (15) are arranged in a rectangular array; When it is necessary to install the turbine blade, the mounting block (12) is welded to the outside of the main shaft (11), and the turbine blade mounting end is placed in the groove of the mounting block (12). The slider (14) in the sliding groove is used to make the sliders (14) on both sides fit together, so that the slider (14) initially fixes the turbine blade. The size of the two sliders (14) is adapted to the size of the mounting block (12), and the turbine blade is fixedly installed by passing the bolt through the second threaded hole (15) and the first threaded hole (13). The fixing block (17) is rotated by the rotating shaft (16) so that the two ends of the fixing block (17) fit with the outer wall of the mounting block (12) and the slider (14) respectively. The fixing block (17) is fixed to the outer wall of the slider (14) through the third threaded hole.

2. The main shaft assembly for a gas turbine according to claim 1, characterized in that: The anti-corrosion coating (21) is applied to the outside of the main shaft (11), and the fixing block (17) is attached to the outer wall of the mounting block (12).

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