CN203476587U

CN203476587U - Guide vane limiting device

Info

Publication number: CN203476587U
Application number: CN201320595941.5U
Authority: CN
Inventors: 陈立春
Original assignee: FUJIAN NANDIAN Co Ltd
Current assignee: FUJIAN NANDIAN Co Ltd
Priority date: 2013-09-26
Filing date: 2013-09-26
Publication date: 2014-03-12
Anticipated expiration: 2023-09-26

Abstract

The utility model relates to a guide vane limiting device applied to a water turbine water guiding mechanism and used for limiting the largest rotation angle of a guide vane. The guide vane limiting device comprises a guide vane arm and a guide vane sleeve; a guide vane shaft is sleeved with the guide vane arm and the guide vane sleeve, an annular groove is formed in the side face of the lower end of the guide vane arm, and the upper end face of the guide vane sleeve is respectively provided with an axial thrust plate I and an axial thrust plate II through inner hexagon socket screws; the edge of the axial thrust plate I and the edge of the axial thrust plate II are clamped in the annular groove; the guide vane limiting device is characterized in that a rotating limiting block is welded to the inner portion of the annular groove; a central angle expanding between the rotating limiting block and the axial thrusting plate I and a central angle expanding between the rotating limiting block and the axial thrusting plate II are the largest angle of forward rotation of the guide vane shaft pushed by the guide vane arm and the largest angle of backward rotation of the guide vane shaft pushed by the guide vane arm respectively. The guide vane limiting device has the advantages that stopping blocks on the guide vane arm and limiting blocks corresponding to the stopping blocks on the guide vane sleeve are omitted, the structure and operation are simple, the problem that the positions of the limiting blocks are difficult to guarantee is solved, and the part manufacturing cost and the machining cost are saved.

Description

Stator limit stoper

Technical field

The utility model relates to stator limit stoper, is applied to the maximum rotation angle of turbine gate mechanism restriction stator.

Background technique

On turbine gate mechanism, in order to limit the maximum possible rotation amplitude of stator, its structure (with reference to Fig. 1～Fig. 3) is on guide vane lever (7), to stretch out a block (12), and at the upper corresponding limiting stopper (16) of setting of guide vane sleeve (10).Operating process is to adjust front limit piece (16) and the same positioning pin hole that drills and reams of guide vane sleeve (10) at water distributor, squeezes into afterwards locating stud (15) and locks bolt (14).After water distributor is adjusted, remove limiting stopper (16) after having determined confined planes, and after repair confined planes, ressemble confinement block (16), to limit the tram of guide vane lever (7)., there is following shortcoming in this structure of prior art: its bad assurance in prevent surface processing difficulties position of the block that the first, guide vane lever stretches out.The second, due to limiting stopper before water distributor assembling with guide vane sleeve drill and ream together definite position after stator adjustment limiting stopper position by incorrect.Therefore limiting stopper need be split out and carry out separately repair.If after water distributor assembling with guide vane sleeve with drilling and reaming, though limiting stopper correct position, clamping location processing difficulties.Three, fabricating cost is high.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, provides a kind of fabricating cost low, the easy stator limit stoper of processing and assembling.

Stator limit stoper, comprises guide vane lever and guide vane sleeve; Guide vane lever and guide vane sleeve are all enclosed within on guide vane teunnion, and guide vane lever lower end side is with annular groove, and installation shaft is distinguished to thrust plate I and axial thrust plate II by socket head screw in guide vane sleeve upper-end surface; The edge of the edge of axial thrust plate I and axial thrust plate II is all entrapped among annular groove; It is characterized in that a rotary spacing piece of welding in annular groove; The central angle of being opened between rotary spacing piece and axial thrust plate I, and the central angle of being opened between axial thrust plate II is respectively that guide vane lever promotes the maximum angle that guide vane teunnion is done positive and negative rotation.

The utlity model has following advantage: cancelled block on guide vane lever and on guide vane sleeve corresponding limiting stopper, structure operation is simple, solved limiting stopper position and be difficult to assurance problem, saves that part is made and the problem such as processing cost.

Accompanying drawing explanation

Accompanying drawing 1 is stator limit device structure sectional view in prior art.

In figure, 1 is end cap, the 2nd, and guide vane teunnion, the 3rd, bolt I, the 4th, minute half bond, the 5th, break pin, the 6th, connecting plate, the 7th, guide vane lever, the 8th, socket head screw, the 9th, axial thrust plate I, the 10th, guide vane sleeve, the 11st, top cover, the 12nd, block, the 13rd, annular groove.

Fig. 2 is that the A of Fig. 1 is to view.

In figure, 12 is blocks, the 7th, and guide vane lever, the 6th, connecting plate, the 5th, break pin, the 4th, minute half bond, the 3rd, bolt, the 1st, end cap, the 14th, bolt II, the 15th, locating stud, the 16th, limiting stopper.

Fig. 3 is that the B-B of Fig. 1 is to sectional view.

In figure, 2 is guide vane teunnions, the 4th, and minute half bond, the 9th, axial thrust plate I, the 8th, socket head screw, the 7th, guide vane lever, the 14th, bolt II, the 15th, locating stud, the 16th, limiting stopper, the 12nd, block, the 10th, guide vane sleeve.

Fig. 4 is the utility model structure sectional view.In figure, retained the major part in stator limit stoper in prior art, these parts have adopted identical reference numerals:

In figure, 1 is end cap, the 2nd, and guide vane teunnion, the 3rd, bolt I, the 4th, minute half bond, the 5th, break pin, the 6th, connecting plate, the 7th, guide vane lever, the 8th, socket head screw, the 9th, axial thrust plate I, the 10th, guide vane sleeve, the 11st, top cover.

Fig. 5 is that the A of Fig. 4 is to view.

In figure, 1 is end cap, the 3rd, and bolt I, the 4th, minute half bond, the 5th, break pin, the 6th, connecting plate, the 7th, guide vane lever.

Fig. 6 is that the B-B of Fig. 4 is to sectional view.

In figure, 7 is guide vane levers, the 8th, and socket head screw, the 9th, axial thrust plate I, the 4th, minute half bond, the 2nd, guide vane teunnion, the 10th, guide vane sleeve, the 17th, rotary spacing piece.

Embodiment

The utility model is further described below in conjunction with accompanying drawing.Stator limit stoper, comprises guide vane lever (7) and guide vane sleeve (10); It is upper that guide vane lever (7) and guide vane sleeve (10) are all enclosed within guide vane teunnion (2), and guide vane lever (7) lower end side is with annular groove, and socket head screw (8) difference installation shaft is passed through to thrust plate I (9) and axial thrust plate II in guide vane sleeve (10) upper-end surface; The edge of the edge of axial thrust plate I (9) and axial thrust plate II is all entrapped among annular groove; A welding rotary spacing piece (17) in annular groove; The central angle of being opened between rotary spacing piece (17) and axial thrust plate I (9), and the central angle of being opened between axial thrust plate II is respectively that guide vane lever (7) promotes the maximum angle that guide vane teunnion (2) is done positive and negative rotation.

Rotary spacing piece (17), is fan-shaped, and two sides has bevel for welding.Its install operation process is after water distributor is adjusted, position on demand and guide vane lever welding, polishing welding seams after welding.

Guide vane lever (7) can rotate around guide vane teunnion center line together by minute same guide vane teunnion of half bond (4) (2).Simultaneously, because axial thrust plate I (9) and axial thrust plate II are fixed on guide vane sleeve (10) end face, its edge snaps in again among the annular groove of guide vane lever lower end side, and the same guide vane lever of guide vane sleeve (10) (7) is axially also just connecting as one, on the top cover being fixed (11).When water distributor promotes guide vane lever (7) and adjusts the direction of stator or opening degree, guide vane lever (7) rotates.And the scope that the amplitude peak of positive and negative rotation is limited in axial thrust plate I (9) and axial thrust plate II by rotary spacing piece (17) decides.So successfully realize the spacing of stator, also just cancelled the block that stretches out from guide vane lever in prior art and be the limiting stopper of block setting, solved the problem of prevent surface difficult processing.Stator limit structure cylinder list in the utility model device, fabricating cost has also just been reduced.

Claims

1. stator limit stoper, comprises guide vane lever (7) and guide vane sleeve (10); It is upper that guide vane lever (7) and guide vane sleeve (10) are all enclosed within guide vane teunnion (2), and guide vane lever (7) lower end side is with annular groove, and socket head screw (8) difference installation shaft is passed through to thrust plate I (9) and axial thrust plate II in guide vane sleeve (10) upper-end surface; The edge of the edge of axial thrust plate I (9) and axial thrust plate II is all entrapped among annular groove; It is characterized in that a welding rotary spacing piece (17) in annular groove; The central angle of being opened between rotary spacing piece (17) and axial thrust plate I (9), and the central angle of being opened between axial thrust plate II is respectively that guide vane lever (7) promotes the maximum angle that guide vane teunnion (2) is done positive and negative rotation.