CN217107289U - Runner blade for mixed-flow water turbine - Google Patents

Abstract

The utility model discloses a runner blade for a mixed flow water turbine, which relates to the technical field of runner blades and comprises an upper bracket, wherein the lower end of the upper bracket is provided with a lower bracket, a blade body is arranged between the lower bracket and the upper bracket, the outer surface of the upper bracket is provided with a hollow column, the inner part of the hollow column is provided with an internal rotation structure, the outer surface of the lower bracket is provided with an external rotation structure, the internal rotation structure comprises a supporting plate arranged on the outer surface of the inner wall of the hollow column, the outer surface of the inner wall of the hollow column is provided with an external spacing strip near the upper end of the supporting plate, the upper end of the supporting plate is provided with a bearing, the utility model solves the problems that the rotating axis of the runner blade of the existing mixed flow water turbine is large in internal abrasion, the installation of the internal bearing is inconvenient, the internal bearing is not beneficial to long-term use, and the lower bracket part also follows the blade to rotate at high speed, the abrasion is large, and the durability is poor.

Description

Runner blade for mixed-flow water turbine

Technical Field

The utility model relates to a runner blade technical field specifically is a runner blade for mixed-flow water turbine.

Background

A runner blade for francis turbine is a runner blade for francis turbine, and the inside wearing and tearing of runner blade pivoted axle center of current francis turbine are great, and the installation of inconvenient inner bearing is unfavorable for permanent use, and secondly, the blade is carried out high-speed rotation along with lower support part equally, and wearing and tearing are great, and the durability is relatively poor, and for this reason, the staff in the field has provided a runner blade for francis turbine.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a runner blade for francis turbine, the inside wearing and tearing in runner blade pivoted axle center of having solved current francis turbine are great, and the installation of inconvenient inside bearing, are unfavorable for using for a long time, and the lower carriage part is the same to be followed the blade and is carried out high-speed rotation, and wearing and tearing are great, the relatively poor problem of durability.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a runner blade for a mixed-flow water turbine comprises an upper support, wherein a lower support is arranged at the lower end of the upper support, a blade body is arranged between the lower support and the upper support, a hollow column is arranged on the outer surface of the upper support, an internal rotation structure is arranged inside the hollow column, and an external rotation structure is arranged on the outer surface of the lower support;

the internal rotation structure is including setting up in the backup pad of hollow post inner wall surface, the upper end department that the inner wall surface of hollow post is close to the backup pad is provided with outer spacing, the upper end of backup pad is provided with the bearing, the spread groove has been seted up to the surface of bearing, the inner wall surface of bearing is provided with interior spacing.

As a further technical scheme of the utility model, outer rotating-structure includes that the multiunit symmetry is seted up in the inside spacing groove of lower carriage, the inside of spacing groove is provided with the pivot, is provided with the gyro wheel between the pivot of two sets of symmetry spacing inslots.

As a further technical scheme of the utility model, the backup pad is hollow columnar structure, the quantity of outer spacing is three groups and distributes for cyclic annular array, outer spacing and spread groove phase-match, and the two position looks one-to-one.

As a further technical scheme of the utility model, the quantity of interior spacing is three groups and distributes for cyclic annular array, interior spacing is bellied stripe structure, the external diameter size of bearing equals with the internal diameter size of hollow post, the internal diameter of bearing is less than the internal diameter of backup pad.

As a further technical scheme of the utility model, the quantity of pivot is a plurality of groups, and is a set of the quantity that the gyro wheel corresponds spacing groove and pivot is two sets of, the pivot is cylindrical cell body form.

As a further technical scheme of the utility model, be connected for rotating between pivot and the lower carriage, the gyro wheel is cylindric gyro wheel form and edge corner is the fillet structure, the one-third part of gyro wheel exposes in the outside of lower carriage.

As a further technical scheme of the utility model, the quantity of blade body specifically is 14 blade bodies of group for a plurality of groups, the thickness of blade body is 5mm, and the edge of blade body is cambered surface fillet structure.

Advantageous effects

The utility model provides a runner blade for mixed-flow water turbine. Compared with the prior art, the method has the following beneficial effects:

1. the utility model provides a runner blade for francis turbine, effect through interior revolution mechanic, during the installation, the user can be gone into the position of connecting groove on the bearing corresponding to outer spacing department card, can carry out the bearing to whole bearing through the backup pad, thereby can make things convenient for the installation of bearing in hollow post, and on the same way, protruding setting through interior spacing can conveniently be connected with other components, through bearing pivoted characteristic, can make whole blade body and be connected the component when rotating more smooth and easy, thereby make things convenient for the inside rotation of equipment, the effect of use is better.

2. The utility model provides a runner blade for francis turbine, through the effect of outer rotating-structure, when using, through the rotation of lower carriage, can make the gyro wheel carry on spacingly to the position of lower carriage, thereby avoid the lower carriage to produce the rotational friction between pivoted in-process and other hydraulic turbine components, thereby can reduce the loss of use of lower carriage, the effect of cooperation rotating-structure can make true blade body and coupling assembling more durable, and life is longer, and the effect of use is better.

Drawings

FIG. 1 is a schematic structural view of a runner blade for a francis turbine;

FIG. 2 is a partial schematic structural view of a turbine runner blade bearing assembly and disassembly for a francis turbine;

fig. 3 is a partial structural view of an outer turning structure of runner blades for a francis turbine.

In the figure: 1. an upper bracket; 2. a lower bracket; 3. a blade body; 4. a hollow column; 5. a rotating structure; 51. a support plate; 52. an outer limit strip; 53. a bearing; 54. connecting grooves; 55. an inner limiting strip; 6. an outer rotating structure; 61. a limiting groove; 62. a rotating shaft; 63. and a roller.

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, the present invention provides a runner blade for a francis turbine, which has a technical scheme: the utility model provides a runner blade for francis turbine, includes upper bracket 1, and the lower extreme of upper bracket 1 is provided with lower carriage 2, is provided with blade body 3 between lower carriage 2 and the upper bracket 1, and the surface of upper bracket 1 is provided with hollow post 4, and the inside of hollow post 4 is provided with interior rotation structure 5, and the surface of lower carriage 2 is provided with outer rotation structure 6.

Referring to fig. 2, the inner rotating structure 5 includes a supporting plate 51 disposed on an outer surface of an inner wall of the hollow column 4, an outer limiting strip 52 is disposed on an upper end of the outer surface of the inner wall of the hollow column 4 near the supporting plate 51, a bearing 53 is disposed on an upper end of the supporting plate 51, a connecting groove 54 is disposed on an outer surface of the bearing 53, an inner limiting strip 55 is disposed on an outer surface of an inner wall of the bearing 53, the supporting plate 51 is a hollow column 4-shaped structure, the outer limiting strips 52 are distributed in three groups and in an annular array, the outer limiting strips 52 are matched with the connecting groove 54 and are located in one-to-one correspondence, the inner limiting strips 55 are distributed in three groups and in an annular array, the inner limiting strips 55 are in a protruding strip-shaped structure, an outer diameter of the bearing 53 is equal to an inner diameter of the hollow column 4, an inner diameter of the bearing 53 is smaller than an inner diameter of the supporting plate 51, when the hollow column is installed, a user can insert the connecting groove 54 on the bearing 53 corresponding to the outer limiting strip 52, can carry out the bearing to whole bearing 53 through backup pad 51 to can make things convenient for the installation of bearing 53 in hollow post 4, on the same way, the protruding setting through interior spacing 55 can conveniently be connected with other components, through bearing 53 pivoted characteristic, can make whole blade body 3 and be connected the component when rotating more smooth and easy, thereby make things convenient for the inside rotation of equipment.

Referring to fig. 3, the outer rotating structure 6 includes a plurality of sets of limiting grooves 61 symmetrically formed in the lower bracket 2, a rotating shaft 62 is disposed in each limiting groove 61, a plurality of sets of rollers 63 are disposed between the rotating shafts 62 in the two sets of limiting grooves 61, the number of the rotating shafts 62 is two, one set of rollers 63 corresponds to each limiting groove 61 and each rotating shaft 62, the rotating shafts 62 are cylindrical groove-shaped, the rotating shafts 62 are rotatably connected with the lower bracket 2, each roller 63 is cylindrical roller 63-shaped, a corner of an edge of each roller is a rounded corner structure, one third of each roller 63 is exposed outside the lower bracket 2, the number of the blade bodies 3 is a plurality of sets, specifically 14 sets of blade bodies 3, the thickness of each blade body 3 is 5mm, and the edge of each blade body 3 is a cambered rounded corner structure, when in use, the position of the lower bracket 2 can be limited by the rollers 63 through rotation of the lower bracket 2, thereby avoid the lower carriage 2 to produce between pivoted in-process and other hydraulic turbine components and rotate friction to can reduce the use loss of lower carriage 2, cooperation revolution mechanic 5's effect can make true blade body 3 and coupling assembling more durable, and life is longer.

The utility model discloses a theory of operation: when using, during the installation, the user can be gone up the position of spread groove 54 with bearing 53 and be located the card to go into corresponding to outer spacing 52, can carry out the bearing to whole bearing 53 through backup pad 51, thereby can make things convenient for the installation of bearing 53 in hollow post 4, when using, rivers can flow to blade body 3, can lead rivers to the below under blade body 3's effect, and meanwhile, bearing 53 can rotate, gyro wheel 63 is spacing to the position of lower carriage 2 simultaneously, thereby avoid lower carriage 2 to produce the rotating friction between pivoted in-process and other hydraulic turbine components, thereby can reduce the loss of use of lower carriage 2, cooperation revolution mechanic 5's effect, can make true blade body 3 and coupling assembling more durable, long service life, the effect of use is better.

It should be noted that, the protruding setting through interior spacing 55 can be conveniently connected with other components, through bearing 53 pivoted characteristic, can make whole blade body 3 and be connected the component when rotating more smooth and easy, thereby make things convenient for the inside rotation of equipment, the effect of use is better, simultaneously through 14 blade body 3's of group effect, under the unchangeable condition of appearance size, reduce blade thickness, increase blade quantity simultaneously, the area of crossing water remains unchanged, so the output of runner increases, can make the wear resistance of this runner strengthen by a wide margin, the efficiency of outputting power improves.

Claims (7)

1. A runner blade for a mixed-flow water turbine comprises an upper support (1) and is characterized in that a lower support (2) is arranged at the lower end of the upper support (1), a blade body (3) is arranged between the lower support (2) and the upper support (1), a hollow column (4) is arranged on the outer surface of the upper support (1), an inner rotating structure (5) is arranged inside the hollow column (4), and an outer rotating structure (6) is arranged on the outer surface of the lower support (2);

the internal rotation structure (5) is including setting up in backup pad (51) of hollow post (4) inner wall surface, the upper end department that the inner wall surface of hollow post (4) is close to backup pad (51) is provided with outer spacing (52), the upper end of backup pad (51) is provided with bearing (53), spread groove (54) have been seted up to the surface of bearing (53), the inner wall surface of bearing (53) is provided with interior spacing (55).

2. Runner blade for a francis turbine according to claim 1, characterised in that the outer turning structure (6) comprises a plurality of sets of symmetrical limiting grooves (61) formed in the lower frame (2), the limiting grooves (61) are provided with rotating shafts (62), and rollers (63) are arranged between the rotating shafts (62) in the two sets of symmetrical limiting grooves (61).

3. Runner blade for a francis turbine according to claim 1, wherein the supporting plate (51) is a hollow cylindrical structure, the number of the outer limiting strips (52) is three, and the outer limiting strips are distributed in an annular array, the outer limiting strips (52) are matched with the connecting grooves (54), and the positions of the outer limiting strips and the connecting grooves are in one-to-one correspondence.

4. The runner blade for the francis turbine according to claim 3, wherein the number of the inner limiting strips (55) is three groups and is distributed in an annular array, the inner limiting strips (55) are of a raised strip-shaped structure, the outer diameter of the bearing (53) is equal to the inner diameter of the hollow column (4), and the inner diameter of the bearing (53) is smaller than the inner diameter of the support plate (51).

5. The runner blade for the francis turbine according to claim 2, wherein the number of the rotating shafts (62) is several groups, the number of the roller (63) corresponding to one group of the limiting grooves (61) and the number of the rotating shafts (62) are two groups, and the rotating shafts (62) are cylindrical groove bodies.

6. The runner blade for the francis turbine according to claim 5, wherein the rotating shaft (62) is rotatably connected with the lower bracket (2), the roller (63) is cylindrical and has a roller shape with round corners, and one third of the roller (63) is exposed outside the lower bracket (2).

7. Runner blade for a francis turbine according to claim 1, characterised in that the number of the blade bodies (3) is several groups, in particular 14 groups of blade bodies (3), the thickness of the blade bodies (3) is 5mm, and the edge of the blade bodies (3) is of a cambered fillet structure.

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