CN216240816U

CN216240816U - Novel double-layer blade of steam turbine

Info

Publication number: CN216240816U
Application number: CN202123013663.1U
Authority: CN
Inventors: 吴纯杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-04-08
Anticipated expiration: 2031-12-02

Abstract

The utility model discloses a novel double-layer blade of a steam turbine, which belongs to the technical field of steam turbines, wherein the damage of the blade leads to the whole scrapping treatment, and the blade root is easy to break due to the axial stress of the blade; the upper blade and the lower blade are single blades, and can be detachably arranged in the mounting sleeve, so that the assembly and the maintenance are convenient.

Description

Novel double-layer blade of steam turbine

Technical Field

The utility model relates to the technical field of steam turbines, in particular to a novel double-layer blade of a steam turbine.

Background

The power blade of steam turbine often forms with main shaft formula processing production as an organic whole, because of the technological requirement height, high in manufacturing cost, 1, often in actual use, often be in the blade damage condition and take place, lead to whole scrapping treatment, 2, double-deck blade in the past is two independent whole to assemble with the main shaft, because of the axial atress of blade, lead to the blade to use often to appear root rupture phenomenon easily, for this we propose a novel double-deck blade of steam turbine and be used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a novel double-layer blade for a steam turbine to solve the above problems.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a novel double-deck blade of steam turbine, includes the main shaft, the main shaft bottom mounting is equipped with the installation axle, install the external fixation of axle and cup jointed the installation cover, installation cover surface joint has blade subassembly and a plurality of joint spare, joint spare both sides fixedly connected with fixed subassembly, fixed subassembly and main shaft threaded connection, blade subassembly and joint spare joint, installation cover, blade subassembly all with fixed subassembly fixed connection.

According to a preferable technical scheme of the utility model, a plurality of fan-shaped blocks are fixedly arranged on the outer surface of the installation shaft, a first arc-shaped connecting block is fixedly arranged on the upper surface of each fan-shaped block, the inner arc surface of each first arc-shaped connecting block is fixedly connected with the outer surface of the installation shaft, two sides of each first arc-shaped connecting block are clamped with the installation sleeve, a first screw hole is formed in the surface of each fan-shaped block, and a fixing component is connected with the inner threads of the first screw hole.

As a preferred technical scheme of the utility model, the mounting sleeve is in a circular barrel shape, the outer surface of the mounting sleeve is provided with a plurality of first clamping grooves and second clamping grooves, clamping and connecting pieces are clamped in the first clamping grooves, blade assemblies are clamped in the second clamping grooves, a plurality of first sector-shaped mounting blocks and second sector-shaped mounting blocks are fixedly arranged on the outer surface of the mounting sleeve, the first sector-shaped mounting blocks and the second sector-shaped mounting blocks are respectively arranged in two layers, any one first sector-shaped mounting block is arranged between the two second sector-shaped mounting blocks, the surface of the first sector-shaped mounting block at the upper end is fixedly provided with a second arc-shaped connecting block, the inner arc surface of the second arc-shaped connecting block is fixedly connected with the outer surface of the mounting shaft, the surface of the first sector-shaped mounting block is provided with a second screw hole, the second screw hole is connected with a fixing assembly in a threaded manner, and any one second arc-shaped connecting block is clamped between the two first arc-shaped connecting blocks, the first fan-shaped mounting block is externally clamped and connected with a clamping piece.

As a preferred technical solution of the present invention, the first and second slots are both fan-shaped, the first and second slots are both provided with two layers, and any one of the first slots is disposed between the two second slots.

As a preferred technical scheme of the utility model, the blade assembly comprises an upper blade and a lower blade, one ends of the upper blade and the lower blade are clamped in the second clamping grooves, the upper blade and the lower blade are clamped between the clamping pieces, and the upper blade and the lower blade are fixedly connected with the fixing assembly.

As a preferred technical scheme of the present invention, the clamping member is fan-shaped, the inner arc surface of the clamping member is fixedly provided with a fan-shaped connecting block, a first clamping block set and a second clamping block set, the upper surface of the fan-shaped connecting block is fixedly connected to the bottom surface of the fan-shaped block, the first clamping block set and the second clamping block set are clamped with a first fan-shaped mounting block, the fan-shaped connecting block, the first clamping block set and the second clamping block set are all provided with through holes, and the through holes are internally threaded and connected with the fixing component.

As a preferable technical solution of the present invention, the fixing assembly includes a first bolt and a second bolt, the first bolt has a first screw hole, a first upper blade and a second lower blade, the first bolt has a bottom screw hole, the second bolt has a second screw hole, and a through hole, the four fixing bars are respectively and fixedly connected to the upper and lower surfaces of any one of the upper and lower blades, the fixing bar has a third bolt, and the bottom screw hole of the third bolt is connected to the inside of the engaging member.

Compared with the prior art, the utility model has the beneficial effects that:

1. the main shaft is clamped with the first fan-shaped mounting block of the fixed mounting sleeve through the fan-shaped block of the mounting shaft, and is clamped with the blade assembly through the mounting sleeve, and the root of the fixed blade is reinforced through the clamping piece and the fixed assembly, so that the firmness of the blade structure is improved;

2. the upper blade and the lower blade are single blades, and can be detachably arranged in the mounting sleeve, so that the assembly and the maintenance are convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention,

figure 2 is a schematic view of the principal axis of the structure of the present invention,

figure 3 is a schematic view of a structural blade assembly of the present invention,

figure 4 is a schematic view of a structural mounting sleeve of the present invention,

figure 5 is a schematic view of a structural fixing assembly of the present invention,

fig. 6 is a schematic view of the structural clip of the present invention.

In the figure: 1. a main shaft; 11. installing a shaft; 12. a sector block; 121. a first arc-shaped connecting block; 122. a first screw hole; 2. installing a sleeve; 21. a first card slot; 22. a second card slot; 23. a first sector mounting block; 231. a second arc-shaped connecting block; 232. a second screw hole; 24. a second sector mounting block; 3. a blade assembly; 31. an upper blade; 32. a lower blade; 4. a clamping piece; 41. a fan-shaped connecting block; 42. a first clip group; 43. a second clip group; 44. perforating; 5. a fixing assembly; 52. a first bolt; 53. a second bolt; 54. a fixing strip; 55. and a third bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1 to 6, the present invention provides a novel double-layer blade for a steam turbine, comprising a main shaft 1, the bottom end of the main shaft 1 is fixedly provided with an installation shaft 11, the installation shaft 11 is fixedly sleeved with an installation sleeve 2, the installation shaft 11 and the installation sleeve 2 are fixedly installed, the outer surface of the installation sleeve 2 is clamped with a blade assembly 3 and a plurality of clamping pieces 4, the blade assembly 3 is fixedly clamped and arranged through the mounting sleeve 2, the blade assembly 3 is fixedly clamped and arranged through the clamping piece 4, the compressive strength of the root part of the blade is increased, the fixing assemblies 5 are fixedly connected with the two sides of the clamping piece 4, so that the blade assembly 3 is fixedly installed by the fixing assembly 5, the fixing assembly 5 is threadedly coupled with the main shaft 1,

blade subassembly

3 and 4 joints of joint spare, installation cover 2, blade subassembly 3 all with 5 fixed connection of fixed subassembly to constitute complete double-deck blade.

Further, installation axle 11 external fixed surface is equipped with a plurality of fans 12, surface mounting is equipped with first arc connecting block 121 on the fan 12, the 11 surface of arc fixed connection installation axle in first arc connecting block 121, first arc connecting block 121 both sides joint installation cover 2 to

installation axle

11 and 2 fixed connection of installation cover, first screw 122 has been seted up on fan 12 surface, first screw 122 female connection fixed component 5, fixed component 5 is by fixed mounting.

Further, the mounting sleeve 2 is in a circular barrel shape, the outer surface of the mounting sleeve 2 is provided with a plurality of first clamping grooves 21 and a plurality of second clamping grooves 22, the clamping piece 4 is clamped in the first clamping groove 21, the blade assembly 3 is clamped in the second clamping groove 22, the outer surface of the mounting sleeve 2 is fixedly provided with a plurality of first fan-shaped mounting blocks 23 and second fan-shaped mounting blocks 24, the first fan-shaped mounting blocks 23 and the second fan-shaped mounting blocks 24 are respectively arranged in two layers, any one of the first fan-shaped mounting blocks 23 is arranged between the two second fan-shaped mounting blocks 24, the first fan-shaped mounting blocks 23 and the second fan-shaped mounting blocks 24 are distributed in a staggered mode, the clamping piece 4 can be clamped with the first fan-shaped mounting blocks 23 for use, the first fan-shaped mounting blocks 23 at the upper end are fixedly provided with second arc-shaped connecting blocks 231 on the surface, the 11 surfaces of cambered surface fixed connection installation axle in the second arc connecting block 231, second screw 232 has been seted up on 23 surface surfaces of first fan-shaped installation piece, the fixed subassembly 5 of second screw 232 internal thread connection, arbitrary one second arc connecting block 231 joint between two first arc connecting blocks 121, the joint union piece 4 is connected in the joint outside 23 first fan-shaped installation pieces, and fixed subassembly 5 makes 3 fixed mounting of blade subassembly, and joint piece 4 can realize fixedly to a plurality of joint pieces 4 carry out evenly distributed around 2 rounds of installation cover.

Further, first draw-in groove 21, second draw-in groove 22 all are fan-shaped, first draw-in groove 21, second draw-in groove 22 all are provided with two-layerly, and arbitrary first draw-in groove 21 is located between two second draw-in grooves 22 to make joint 4 and blade subassembly 3 can joint each other, and realize fixed mounting.

Further, blade assembly 3 is including last blade 31, lower blade 32, go up blade 31 and the equal joint of lower blade 32 one end in second draw-in groove 22, go up blade 31, lower blade 32 can form double-deck blade to can realize single card dismantlement, go up blade 31, the equal joint of lower blade 32 between joint spare 4, go up blade 31, the equal fixed connection fixed component 5 of lower blade 32 to go up blade 31, lower blade 32 by fixed mounting.

Further, joint spare 4 is fan-shaped, fixed fan-shaped connecting block 41, first splint group 42 and the second splint group 43 of being equipped with of cambered surface in joint spare 4, fixed surface connects in fan-shaped 12 bottom surfaces on the fan-shaped connecting block 41 to joint spare 4 and installation cover 2 fixed connection, the first fan-shaped installation piece 23 of equal joint between first splint group 42 and the second splint group 43, all seted up perforation 44 in fan-shaped connecting block 41, first splint group 42 and the second splint group 43, perforation 44 female connection fixed subassembly 5 to first splint group 42 and the first fan-shaped installation piece 23 of second splint group 43 joint enable joint spare 4 and installation cover 2 to strengthen fixedly.

Further, the fixing assembly 5 comprises a first bolt 52 and a second bolt 53, the first bolt 52 is threaded through by a fixing bar 54, the bottom end of the first bolt 52 is threaded through the first screw hole 122, the upper blade 31 and the lower blade 32, so that the upper blade 31, the lower blade 32 and the mounting sleeve 2 are fixed by the first bolt 52, the second bolt 53 is threaded through the second screw hole 232 and the through hole 44, the four fixing strips 54 are respectively fixedly connected to the upper and lower surfaces of any one of the upper blade 31 or the lower blade 32, the fixing strip 54 is provided with a third bolt 55 by screw thread, the bottom end of the third bolt 55 is connected in the clamping piece 4 by screw thread, so that the clamping piece 4 is fixedly connected with the mounting sleeve 2 by the second bolt 53, the fixing strip 54, the upper blade 31 and the lower blade 32 can then be fixedly mounted on the clip 4 by means of the third screw 55.

The working principle is as follows: the double-layer blade comprises a plurality of single detachable upper blades 31 and lower blades 32, and is divided into two layers to be clamped and installed on the outer surface of the installation sleeve 2, then the clamping is carried out through the clamping piece 4, and the fixed installation is carried out through the fixing component 5, so that the pressure resistance of the root part of each blade is improved, concretely, the bottom end of the main shaft 1 is fixedly connected with the installation shaft 11, a plurality of fan-shaped blocks 12 are uniformly and fixedly installed on the outer surface of the installation shaft 11, a first arc-shaped connecting block 121 fixedly connected with the upper surface of each fan-shaped block 12 is fixedly connected with the outer surface of the installation shaft 11, a plurality of first fan-shaped installing blocks 23 are uniformly and fixedly installed on the outer surface of the upper end of the installation sleeve 2, any one fan-shaped block 12 is arranged between the first fan-shaped installing blocks 23, any two plurality of first arc-shaped connecting blocks 121 are clamped between two second arc-shaped connecting blocks 231, thereby the installation sleeve 2 is fixedly connected with the installation shaft 11, two layers of a plurality of first clamping grooves 21 and a second clamping groove 22 are arranged in the installation sleeve 2, any one first clamping groove 21 is arranged between the two second clamping grooves 22, one ends of the upper blade 31 and the lower blade 32 are clamped in the second clamping grooves 22, then the clamping pieces 4 are clamped in the first clamping grooves 21, the clamping pieces 4 are uniformly distributed around the installation sleeve 2 in a circle, meanwhile, the clamping pieces 4 are clamped between the blades, the upper surface of the fan-shaped connecting block 41 is fixedly connected to the bottom surface of the fan-shaped block 12, so that the clamping pieces 4 are fixedly connected with the installation sleeve 2, the first clamping block group 42 and the second clamping block group 43 are clamped with the first fan-shaped installation block 23, the clamping pieces 4 and the installation sleeve 2 can be fixedly enhanced, then the upper blade 31, the lower blade 32 and the installation sleeve 2 are fixed through the first bolts 52, the clamping pieces 4 are fixedly connected with the installation sleeve 2 through the second bolts 53, then the fixing strips 54, the upper blade 31 and the lower blade 32 can be fixedly installed on the clamping pieces 4 through the third bolts 55, therefore, the firmness of the root structure of the blade can be realized, each blade can be detachably mounted, and the blade is convenient to assemble and maintain.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel double-deck blade of steam turbine, includes main shaft (1), its characterized in that: the utility model discloses a fixed mounting structure of a motor, including main shaft (1), installation axle (11) outer fixed cover has connect installation cover (2), installation cover (2) surface joint has blade subassembly (3) and a plurality of joint spare (4), joint spare (4) both sides fixedly connected with fixed subassembly (5), fixed subassembly (5) and main shaft (1) threaded connection, blade subassembly (3) and joint spare (4) joint, installation cover (2), blade subassembly (3) all with fixed subassembly (5) fixed connection.

2. The new double-layer blade of steam turbine as claimed in claim 1, wherein: installation axle (11) external fixed surface is equipped with a plurality of sectorial blocks (12), surface mounting is equipped with first arc connecting block (121) on sectorial block (12), cambered surface fixed connection installation axle (11) surface in first arc connecting block (121), first arc connecting block (121) both sides joint installation cover (2), first screw (122) have been seted up on sectorial block (12) surface, first screw (122) female connection fixed subassembly (5).

3. The new double-layer blade of steam turbine as claimed in claim 2, wherein: the installation sleeve (2) is in a circular barrel shape, a plurality of first clamping grooves (21) and second clamping grooves (22) are formed in the outer surface of the installation sleeve (2), clamping pieces (4) are clamped in the first clamping grooves (21), blade assemblies (3) are clamped in the second clamping grooves (22), a plurality of first fan-shaped installation blocks (23) and second fan-shaped installation blocks (24) are fixedly arranged on the outer surface of the installation sleeve (2), the first fan-shaped installation blocks (23) and the second fan-shaped installation blocks (24) are respectively arranged in two layers, any one first fan-shaped installation block (23) is arranged between the two second fan-shaped installation blocks (24), a second arc-shaped connection block (231) is fixedly arranged on the surface of the first fan-shaped installation block (23) at the upper end, the inner arc-shaped surface of the second arc-shaped connection block (231) is fixedly connected with the outer surface of the installation shaft (11), a second screw hole (232) is formed in the surface of the first fan-shaped installation block (23), the second screw hole (232) is connected with the fixing component (5) through internal threads, any one of the second arc-shaped connecting blocks (231) is clamped between the two first arc-shaped connecting blocks (121), and the first fan-shaped mounting block (23) is externally clamped and connected with the clamping piece (4).

4. The new double-layer blade for steam turbines as claimed in claim 3, wherein: the first clamping groove (21) and the second clamping groove (22) are both fan-shaped, the first clamping groove (21) and the second clamping groove (22) are both provided with two layers, and any one first clamping groove (21) is arranged between the two second clamping grooves (22).

5. The new double-layer blade for steam turbines as claimed in claim 3, wherein: blade subassembly (3) are including last blade (31), lower blade (32), go up blade (31) and lower blade (32) one end equal joint in second draw-in groove (22), go up blade (31), lower blade (32) equal joint between joint spare (4), go up blade (31), lower blade (32) equal fixed connection fixed subassembly (5).

6. The new double-layer blade for steam turbine as claimed in claim 5, wherein: joint spare (4) are fan-shaped, fixed being equipped with fan-shaped connecting block (41), first splint group (42) and second splint group (43) of cambered surface in joint spare (4), fixed surface connects in fan-shaped piece (12) bottom surface on fan-shaped connecting block (41), first fan-shaped installation piece (23) of equal joint between first splint group (42) and second splint group (43), all seted up in fan-shaped connecting block (41), first splint group (42) and the second splint group (43) and perforated (44), fixed subassembly (5) of perforation (44) female connection.

7. The new double-layer blade for steam turbine as claimed in claim 6, wherein: fixed subassembly (5) is including first bolt (52), second bolt (53), first bolt (52) screw thread runs through has fixed strip (54), first bolt (52) bottom screw thread runs through first screw (122), goes up blade (31) and lower blade (32), second bolt (53) screw thread runs through second screw (232), perforation (44), four fixed strip (54) fixed connection respectively in arbitrary one go up the upper and lower surface of blade (31) or lower blade (32), fixed strip (54) screw thread is provided with third bolt (55), third bolt (55) bottom threaded connection is in joint spare (4).