CN209800029U

CN209800029U - Moving blade of steam turbine

Info

Publication number: CN209800029U
Application number: CN201822017679.1U
Authority: CN
Inventors: 郑卫民; 陈志刚; 赵长发
Original assignee: Zaoyang Dayuan Energy Co Ltd
Current assignee: Zaoyang Dayuan Energy Co Ltd
Priority date: 2018-12-04
Filing date: 2018-12-04
Publication date: 2019-12-17
Anticipated expiration: 2028-12-04

Abstract

The utility model discloses a steam turbine moving blade, which comprises a blade root and an inner radial surface, wherein the upper end of the blade root is provided with an inner radial surface, the blade root is connected with the inner radial surface by welding, the upper end of the inner radial surface is provided with a blade body, the surface end of the blade body is provided with an inner arc, and the surface side of one end of the blade body away from the inner arc is provided with a back arc. And simultaneously, the degree of saving materials can be achieved to the greatest extent, and the steam inlet efficiency is increased.

Description

Moving blade of steam turbine

Technical Field

The utility model belongs to the technical field of the steam turbine is relevant, concretely relates to steam turbine moving blade.

Background

The steam turbine is the main device of electricity generation now, leaks gas easily at the junction of nozzle and cylinder, leads to the steam turbine throttle to have failure often in the speed governing, and present treatment mode all adopts the mode of "stifled" to solve basically, and the stifled not just careless, if adopts corresponding equipment will reveal steam and carry the nozzle again, can effectively solve the problem of the steam turbine often gas leakage, can solve the problem that the speed governing is malfunctioning because of leaking gas not enough again.

The prior moving blade technology has the following problems: the existing turbine blade has the defects of short service life, possibility of damaging the moving blade in serious conditions, incapability of being used in the frequency-adjustable twisted blade of the turbine and high production cost due to the fact that the existing turbine blade is large in impact force, small in borne centrifugal force and poor in flow guide effect when in use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steam turbine moving blade to the impact force of proposing in solving above-mentioned background art is great, and the centrifugal force of bearing is less, and the water conservancy diversion effect is not good, consequently the shorter problem of life.

In order to achieve the above object, the utility model provides a following technical scheme: a moving blade of a steam turbine comprises a blade root and an inner radial surface, wherein the upper end of the blade root is provided with the inner radial surface, the blade root is connected with the inner radial surface through welding, the upper end of the inner radial surface is provided with a blade body, the surface end of the blade body is provided with an inner arc, the surface side of one end, away from the inner arc, of the blade body is provided with a back arc, the upper end of the left side of the blade body is provided with an air inlet edge, the lower end of the right side of the blade body is provided with an air outlet edge, the upper end of the right side of the blade body is provided with a blade shroud, the inside of the blade shroud is provided with a connecting hole, the blade body comprises a reinforcing convex edge, a surrounding band, a main body, a positioning groove and a connecting plate, the positioning groove is arranged inside the upper end of the connecting plate, the main body is provided with a reinforcing convex edge, the upper end and the lower end, the blade shroud comprises a large blade, a flow guiding arc groove, a reinforcing alloy layer, a small blade and an embedding groove, wherein the flow guiding arc groove is formed in the upper end of the large blade, the embedding groove is formed in the flow guiding arc groove, the reinforcing alloy layer is arranged in the embedding groove, the small blade is arranged at the right end of the reinforcing alloy layer, the blade shroud is fixedly connected with a connecting hole through the flow guiding arc groove, the included angle between one side edge of the large blade and the vertical plane is twenty-two to twenty-seven degrees, and the included angle between the other side edge of the large blade and the vertical plane is thirty-five to forty degrees.

preferably, the upper end and the lower end of the main body are respectively provided with one surrounding belt, the number of the surrounding belts is two, and the two surrounding belts are symmetrically arranged at the upper end and the lower end of the main body respectively.

Preferably, the locating grooves are of a semicircular structure, the number of the locating grooves is two, and the two locating grooves are symmetrically arranged at the left end and the right end of the connecting plate respectively and are arranged in a staggered manner from top to bottom.

Preferably, the inner arc is a hollow arc-shaped concave surface structure, the outer surface of the inner arc is provided with a plurality of flow guide convex edges, and the flow guide convex edges are of arc-shaped structures.

Preferably, the number of the blade roots is two, and the two blade roots are symmetrically arranged on the left side and the right side of the lower end of the inner radial surface respectively.

Compared with the prior art, the utility model provides a steam turbine moving blade possesses following beneficial effect: the utility model relates to a be equipped with water conservancy diversion arc chute between big blade and the lobular among the steam turbine moving blade, be equipped with the caulking groove in the water conservancy diversion arc chute, be equipped with the enhancement alloy-layer in the caulking groove, the whole erosion resistance of turning round the blade can be guaranteed to the enhancement alloy-layer that sets up, increase of service life, it can be that wear-resisting material on the market makes to strengthen the alloy-layer, and it is less to utilize the erosion that the enhancement alloy-layer received when making rotatory, admission efficiency is higher, consequently, long service life is longer, low in production cost, moreover, the steam turbine moving blade is simple in structure, and reasonable, simultaneously big blade one side is twenty-two to twenty-seven degrees with the contained angle of vertical plane, another big blade side is thirty-five to forty degrees with the contained angle of vertical plane, two angles set up like this, make the efficiency of admission highest, and.

drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

FIG. 1 is a schematic structural view of a moving blade of a steam turbine according to the present invention;

FIG. 2 is a schematic structural view of the back side of a moving blade of a steam turbine according to the present invention;

Fig. 3 is a schematic view of the blade structure provided by the present invention;

Fig. 4 is a schematic view of the tip shroud structure proposed by the present invention;

In the figure: 1. a blade root; 2. an inner radial surface; 3. an inner arc; 4. an air inlet edge; 5. a leaf body; 51. a reinforcing bead; 52. a shroud ring; 53. a main body; 54. positioning a groove; 55. a connecting plate; 6. a leaf shroud; 61. a large leaf; 62. a diversion arc groove; 63. reinforcing the alloy layer; 64. a small blade; 65. caulking grooves; 7. connecting holes; 8. an air outlet edge; 9. a back arc.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a turbine moving blade comprises a blade root 1 and an inner radial surface 2, the upper end of the blade root 1 is provided with the inner radial surface 2, the blade root 1 is connected with the inner radial surface 2 through welding, the upper end of the inner radial surface 2 is provided with a blade body 5, the surface end of the blade body 5 is provided with an inner arc 3, the surface side of one end, far away from the inner arc 3, of the blade body 5 is provided with a back arc 9, the upper end of the left side of the blade body 5 is provided with an air inlet edge 4, the lower end of the right side of the blade body 5 is provided with an air outlet edge 8, the upper end surface of a main body 53 is integrally X-shaped, so that the efficiency of steam inlet and steam outlet is higher, the upper end of the right side of the blade body 5 is provided with a blade shroud 6, the inside of the blade shroud 6 is provided with a connecting hole 7, the blade body 5 comprises a reinforcing rib 51, a shroud 52, a main body 53, a positioning groove 54 and a connecting, the service life of the moving blade can be prolonged through the arranged reinforcing convex edge 51, the upper end and the lower end of the reinforcing convex edge 51 are respectively provided with a shroud 52, the blade body 5 is fixedly connected with the inner radial surface 2 through a connecting plate 55 through a bolt, the blade shroud 6 comprises a large blade 61, a flow guide arc groove 62, a reinforcing alloy layer 63, a small blade 64 and an embedded groove 65, the upper end of the large blade 61 is provided with the flow guide arc groove 62, the embedded groove 65 is arranged inside the flow guide arc groove 62, the reinforcing alloy layer 63 is arranged inside the embedded groove 65, the erosion received by the reinforcing alloy layer during rotation is small, the right end of the reinforcing alloy layer 63 is provided with the small blade 64, the blade shroud 6 is fixedly connected with the connecting hole 7 through the flow guide arc groove 62, the included angle between one side edge of the large blade 61 and the vertical plane is twenty-two-seven degrees, the included angle between the other side edge of the large blade 61 and the vertical plane is thirty, so that the efficiency of the admission can be maximized and at the same time the greatest saving in material can be achieved.

Further, the upper end and the lower end of the main body 53 are respectively provided with one surrounding belt 52, so that the reinforcing ribs 51 can be protected to a certain extent, the damage is avoided, the number of the surrounding belts 52 is two, and the two surrounding belts 52 are symmetrically arranged at the upper end and the lower end of the main body 53 respectively.

Further, the constant head tank 54 is semicircular structure, and the constant head tank 54 is provided with two altogether, makes the constant head tank 54 align when needing the installation to can make the more convenient of installation, two constant head tanks 54 are the symmetry respectively and set up at the left and right sides both ends of connecting plate 55 and the setting of stagger joint from top to bottom.

Further, inner arc 3 is inside hollow circular-arc concave surface type structure, and the surface of inner arc 3 is equipped with a plurality of water conservancy diversion beads and a plurality of water conservancy diversion beads are convex structure to can lead the steam flow through the water conservancy diversion bead, increase admission efficiency.

Further, the two blade roots 1 are arranged, so that the fixation can be more compact, and the two blade roots 1 are symmetrically arranged on the left side and the right side of the lower end of the inner radial surface 2 respectively.

The utility model discloses a theory of operation and use flow: the utility model discloses after installing, the upper and lower both ends of main part 53 all are equipped with a shroud 52, the shroud 52 sub-unit connection that is located the lower extreme has polylith connecting plate 55, connecting plate 55 becomes parallel arrangement, and it has curved constant head tank 54 to open on the both sides face of connecting plate 55, and the middle part of main part 53 is equipped with and twists round the enhancement bead 51 of leaf body cross arrangement, and the upper end terminal surface of main part 53 wholly is the X type, and it has two great big blades 61 of width and the less little blade 64 of two widths. The outer surface of the main body 53 is provided with an inner arc 3, the outer surface of the inner arc 3 is provided with a plurality of guide convex edges which are arc-shaped, so that the air flow can be guided through the guide convex edges to increase the steam inlet efficiency, the included angle between one side edge of one large blade 61 and the vertical plane is twenty-two to twenty-seven degrees, the included angle between one side edge of the other large blade 61 and the vertical plane is thirty-five to forty degrees, so that the steam inlet efficiency is highest, and the most material-saving degree can be achieved at the same time, a guide arc groove 62 is arranged between the large blade 61 and the small blade 64, an embedded groove 65 is arranged in the guide arc groove 62, a reinforcing alloy layer 63 is arranged in the embedded groove 65, the arranged reinforcing alloy layer 63 can ensure the erosion resistance of the whole twisted blade and prolong the service life, the reinforcing alloy layer 63 can be made of commercially available wear-resistant materials, and the erosion suffered by the reinforcing alloy layer 63 during, the admission efficiency is higher, therefore life is longer, during the use, will the utility model discloses pack into the rotor of steam turbine in can.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A steam turbine moving blade, includes blade root (1) and internal radial surface (2), its characterized in that: the blade is characterized in that an inner radial surface (2) is arranged at the upper end of the blade root (1), the blade root (1) is connected with the inner radial surface (2) in a welding mode, a blade body (5) is arranged at the upper end of the inner radial surface (2), an inner arc (3) is arranged at the surface end of the blade body (5), a back arc (9) is arranged on the surface side of one end, away from the inner arc (3), of the blade body (5), an air inlet edge (4) is arranged at the upper end of the left side of the blade body (5), an air outlet edge (8) is arranged at the lower end of the right side of the blade body (5), a blade shroud (6) is arranged at the upper end of the right side of the blade body (5), a connecting hole (7) is formed in the blade shroud (6), the blade body (5) comprises a reinforcing rib (51), a surrounding belt (52), a main body (53), a positioning groove (54) and a connecting plate (55, the upper end of the connecting plate (55) is provided with a main body (53), the inside of the main body (53) is provided with a reinforcing convex edge (51), the upper end and the lower end of the reinforcing convex edge (51) are respectively provided with a surrounding belt (52), the blade body (5) is fixedly connected with the inner radial surface (2) through the connecting plate (55) by bolts, the blade shroud (6) comprises a large blade (61), a flow guide arc groove (62), a reinforcing alloy layer (63), a small blade (64) and an embedded groove (65), the upper end of the large blade (61) is provided with the flow guide arc groove (62), the embedded groove (65) is arranged inside the flow guide arc groove (62), the reinforcing alloy layer (63) is arranged inside the embedded groove (65), the right end of the reinforcing alloy layer (63) is provided with the small blade (64), and the blade shroud (6) is fixedly connected with the connecting hole (7) through the flow guide arc groove (62), the included angle between one side edge of the large blade (61) and the vertical plane is twenty-two to twenty-seven degrees, and the included angle between the other side edge of the large blade (61) and the vertical plane is thirty-five to forty degrees.

2. the turbine moving blade according to claim 1, wherein: the upper end and the lower end of the main body (53) are respectively provided with one surrounding belt (52), the number of the surrounding belts (52) is two, and the two surrounding belts (52) are symmetrically arranged at the upper end and the lower end of the main body (53) respectively.

3. the turbine moving blade according to claim 1, wherein: the positioning grooves (54) are of a semicircular structure, the number of the positioning grooves (54) is two, and the two positioning grooves (54) are symmetrically arranged at the left end and the right end of the connecting plate (55) respectively and are arranged in a staggered manner from top to bottom.

4. The turbine moving blade according to claim 1, wherein: the inner arc (3) is of a hollow arc-shaped concave surface structure, and the outer surface of the inner arc (3) is provided with a plurality of flow guide convex edges which are of arc-shaped structures.

5. The turbine moving blade according to claim 1, wherein: the blade root (1) is provided with two, two blade roots (1) are respectively symmetrically arranged on the left side and the right side of the lower end of the inner radial surface (2).