CN218882412U

CN218882412U - Through-flow turbine stator spindle nose seal structure

Info

Publication number: CN218882412U
Application number: CN202223075833.3U
Authority: CN
Inventors: 姚海宁; 郑成明; 杨启丰
Original assignee: Fujian Huide Power Generation Equipment Co ltd
Current assignee: Fujian Huide Power Generation Equipment Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-04-18
Anticipated expiration: 2032-11-21

Abstract

The utility model provides a through-flow turbine stator spindle nose seal structure, include: a guide vane; the guide vane sleeve is arranged on a first sealing ring at the top of the guide vane, the first sealing ring is arranged on the inner side of the guide vane sleeve, and a second sealing ring is arranged on the outer side of the guide vane; the inner wear plate is fixedly mounted on the guide vane sleeve through bolts, the top of the first sealing ring is located inside the guide vane sleeve, and a third sealing ring is arranged on the left side of the top of the inner wear plate. The utility model provides a pair of through-flow turbine stator spindle nose seal structure adopts multiple sealed inside and outside "O" type sealing washer sealed, the interior wear plate increases the inside and outside seal structure that "O" type sealing washer and stator sleeve external diameter "O" type sealing washer constitute and adopts polyvinyl chloride packing to seal between outer wear plate and the guide vane axle respectively for floating ring, when a sealed inefficacy back, still has two sealed rigorously still, can effectively prevent the infiltration to reach high-efficient extension seal life's function.

Description

Through-flow turbine stator spindle nose seal structure

Technical Field

The utility model relates to a through-flow turbine field especially relates to a through-flow turbine stator spindle nose seal structure.

Background

The through-flow turbine is a novel unit for developing low-head hydraulic resources, is suitable for heads below 25m, is a horizontal-shaft turbine with a straight-line runner, is similar to an axial flow turbine in runner shape, and has a fixed blade and a rotating blade.

The hydraulic turbine water distributor of the hydropower station is maintained for a long time, and the sealing is invalid due to the abrasion of the sealing structure and the sealing piece, the abrasion and the corrosion of the guide vane shaft head and the like, so that the problem of serious water leakage of the guide vane shaft head is caused.

Therefore, it is necessary to provide a sealing structure for a through-flow turbine guide vane shaft head to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a through-flow turbine stator spindle nose seal structure has solved power station turbine water distributor and has failed the maintenance year by year, because of reasons such as seal structure and sealing member wearing and tearing, stator spindle nose wearing and tearing corrosion, makes sealed inefficacy, leads to the sealed problem of seriously leaking of stator spindle nose to appear.

In order to solve the technical problem, the utility model provides a pair of through-flow turbine stator spindle nose seal structure, include: a guide vane;

a guide vane sleeve disposed at the top of the guide vane

The first sealing ring is arranged on the inner side of the guide vane sleeve, and a second sealing ring is arranged on the outer side of the guide vane;

the inner wear plate is fixedly mounted inside the guide vane sleeve through a bolt and positioned at the top of the first sealing ring, and a third sealing ring is arranged on the left side of the top of the inner wear plate;

the fourth sealing washer, the fourth sealing washer set up in the telescopic outside of stator just is located the top of second sealing washer, the telescopic inside of stator just is located the top of third sealing washer is provided with the oiliness bearing, the top of oiliness bearing is provided with the packing, the telescopic top of stator is provided with outer wear plate.

Preferably, the top of the guide vane sleeve is provided with a guide vane arm at the top of the outer wear plate.

Preferably, the inside fixed mounting of interior wear plate has solid fixed ring, gu fixed ring's top fixed mounting has the magnetic ring.

Preferably, the inner wear plate is provided with a slot on the outer side of the fixed ring.

Preferably, the bottom fixed mounting of slot inside has the sealing ring, the top of interior wear plate is provided with the apron.

Preferably, the bottom of the cover plate is fixedly provided with a sealing insertion column.

Preferably, the bottom of the cover plate is fixedly provided with a fixed iron column at the inner side of the sealed inserting column.

Compared with the prior art, the utility model provides a pair of through-flow turbine stator spindle nose seal structure has following beneficial effect:

the utility model provides a through-flow turbine stator spindle nose seal structure, through first sealing washer, the second sealing washer, interior wear plate, the third sealing washer, the fourth sealing washer, the oiliness bearing, the stator sleeve, the packing, mutually support between the outer wear plate isotructure adopts multiple sealing to seal for floating ring inside and outside "O" type sealing washer respectively, interior wear plate increases the inside and outside seal structure and the outer wear plate that "O" type sealing washer external diameter "O" type sealing washer is constituteed and the guide vane axle between adopt polyvinyl chloride packing to seal, when a sealed inefficacy back, it is sealed tight still to have the twofold, can effectively prevent the infiltration to reach the function of high-efficient extension seal life.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of a through-flow turbine guide vane spindle nose sealing structure provided by the present invention;

fig. 2 is a schematic structural view of a second embodiment of a through-flow turbine guide vane spindle nose sealing structure provided by the present invention;

FIG. 3 is a schematic view of the top of the magnet ring shown in FIG. 2;

fig. 4 is a schematic structural diagram of an external perspective of the cover plate shown in fig. 2.

Reference numbers in the figures: 1. a first sealing ring, 2, a second sealing ring, 3, an inner wear plate, 4, a third sealing ring, 5, a fourth sealing ring, 6, an oil-containing bearing, 7, a guide vane sleeve, 8, a packing, 9, an outer wear plate, 10 and a guide vane arm,

11. the magnetic ring comprises a fixing ring 12, a magnetic ring 13, slots 14, a sealing ring 15, a cover plate 16, sealing insertion columns 17 and fixing iron columns.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

First embodiment

Please refer to fig. 1, wherein fig. 1 is a schematic structural diagram of a first embodiment of a through-flow turbine guide vane spindle nose sealing structure according to the present invention. A through-flow turbine stator spindle nose seal structure includes: a guide vane;

a guide vane sleeve 7, the guide vane sleeve 7 set in the top of the guide vane

The first sealing ring 1 is arranged on the inner side of the guide vane sleeve 7, and the outer side of the guide vane is provided with a second sealing ring 2;

the inner wear plate 3 is fixedly mounted inside the guide vane sleeve 7 through bolts and is positioned at the top of the first sealing ring 1, and a third sealing ring 4 is arranged on the left side of the top of the inner wear plate 3;

fourth sealing washer 5, fourth sealing washer 5 set up in the outside of stator sleeve 7 and being located the top of second sealing washer 2, the inside of stator sleeve 7 just is located the top of third sealing washer 4 is provided with oiliness bearing 6, the top of oiliness bearing 6 is provided with packing 8, the top of stator sleeve 7 is provided with outer wear plate 9.

The oil-impregnated bearing 6, i.e., the porous bearing, is made of a metal powder as a main raw material, and the oil-impregnated bearing 6 is a sintered body produced by a powder metallurgy method, and is inherently porous, and has technical advantages such as the number, size, shape, and distribution of pores can be relatively freely adjusted in the production process.

An all-dimensional inner and outer sealing structure is adopted, an O-shaped sealing ring is arranged on the outer diameter of the floating ring, and the O-shaped sealing ring is additionally arranged on the outer diameter of the guide vane sleeve 7, so that a water leakage channel is thoroughly blocked, and gapless sealing is formed.

The outer wear plate 9 is redesigned and processed, and polyvinyl chloride packing is adopted between the outer wear plate 9 and the guide vane shaft for sealing, so that the outer wear plate has the characteristic of simple operation of disassembling, reinstalling and replacing the packing under the condition that all the seals are invalid.

The shaft sleeve is replaced by an oil-containing copper sleeve, so that the guide vane shaft and the shaft sleeve are compactly matched, the sealing failure caused by gaps is eliminated, and the stability and the flexibility of the guide vane mechanism rotating wheel are ensured.

The top of the guide vane sleeve 7 is located at the top of the outer wear plate 9, and a guide vane arm 10 is arranged at the top of the guide vane sleeve.

The utility model provides a pair of through-flow turbine stator spindle nose seal structure's theory of operation as follows:

the sealing operation between the structures is carried out through the mutual matching between the structures such as the first sealing ring 1, the second sealing ring 2, the third sealing ring 4 and the fourth sealing ring 5, the friction bearing of the joint between the structures is carried out through the matching between the inner wear plate 3 and the outer wear plate 9, and meanwhile, the gap in the guide vane sleeve 7 is filled through the packing 8.

through the mutual cooperation of the structures such as the first sealing ring 1, the second sealing ring 2, the inner wear plate 3, the third sealing ring 4, the fourth sealing ring 5, the oil-containing bearing 6, the guide vane sleeve 7, the packing 8, the outer wear plate 9 and the like, multiple sealing is adopted to respectively seal the inner O-shaped sealing ring and the outer O-shaped sealing ring of the floating ring, the inner O-shaped sealing ring added on the inner wear plate 6 and the outer O-shaped sealing ring of the outer diameter of the guide vane sleeve 7, and polyvinyl chloride packing is adopted to seal between the outer wear plate 9 and the guide vane shaft.

Second embodiment

Referring to fig. 2, 3 and 4, a second embodiment of the present application provides another sealing structure for a through-flow turbine vane head based on the sealing structure for a through-flow turbine vane head provided by the first embodiment of the present application. The second embodiment is only the preferred mode of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.

Specifically, the difference of a through-flow turbine stator spindle nose seal structure that the second embodiment of this application provided lies in, a through-flow turbine stator spindle nose seal structure, the inside fixed mounting of interior wear plate 3 has solid fixed ring 11, gu fixed ring 11's top fixed mounting has magnetic ring 12.

The inside of interior wear-resisting plate 3 just is located the slot 13 has been seted up to the outside of solid fixed ring 11.

The inside bottom fixed mounting of slot 13 has sealing ring 14, the top of interior wear plate 3 is provided with apron 15.

The fixing iron post 17 can be inserted into the inner part of the inner wear plate 3 to contact with the magnetic ring 12 thereof, and the cover plate 15 is stably fixed on the top of the inner wear plate 3 by the magnetic attraction force generated when the fixing iron post 17 contacts with the magnetic ring 12.

And a sealing inserting column 16 is fixedly arranged at the bottom of the cover plate 15.

And a fixed iron column 17 is fixedly arranged at the bottom of the cover plate 15 and positioned on the inner side of the sealing insertion column 16.

The seal insert 16 and the insert groove 13 are adapted to make the inner part of the inner wear plate 3 in a sealed state when the bottom of the seal insert 16 is in contact with the top of the seal ring 14 and in a tight contact state.

the magnetic attraction force is generated by covering the top opening of the inner wear plate 3 with its cover plate 15 and inserting its seal insert 16 into the inside of the insert groove 13 while its fixing iron 17 enters the inside of the inner wear plate 3 and the bottom of the fixing iron 17 contacts the magnetic ring 12 fixedly mounted on the fixing ring 11.

So as to limit the cover plate 15 on the top of the inner wear plate 3, and at the same time, make the sealing insert 16 stably inserted in the inner of the slot 13, and closely contact with the top of the sealing ring 14, so as to make the inner of the inner wear plate 3 in a sealing state.

through mutually supporting between the structures such as solid fixed ring 11, magnetic ring 12, slot 13, sealing ring 14, apron 15, sealed post 16 of inserting, fixed iron prop 17 thereby sealing up the space of wearing plate 3 inside in it, avoid the in-process that uses external water to get into and lead to inside structure to appear rustting influence later stage dismantlement work.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. The utility model provides a through-flow turbine stator spindle nose seal structure which characterized in that includes: a guide vane;

a guide vane sleeve disposed at the top of the guide vane

2. The through-flow turbine stator head seal structure of claim 1, characterized in that the top of the stator sleeve and the top of the outer wear plate are provided with a stator arm.

3. The through-flow turbine stator head seal structure of claim 1, characterized in that the inside of the inner wear plate is fixedly provided with a fixed ring, and the top of the fixed ring is fixedly provided with a magnetic ring.

4. The through-flow turbine guide vane spindle head sealing structure of claim 3, characterized in that a slot is formed inside the inner wear plate and outside the fixing ring.

5. The through-flow turbine stator shaft head seal structure of claim 4, characterized in that a seal ring is fixedly mounted at the bottom inside the slot, and a cover plate is arranged at the top of the inner wear plate.

6. The sealing structure of the through-flow turbine guide vane shaft head as claimed in claim 5, wherein the bottom of the cover plate is fixedly provided with a sealing insert post.

7. The sealing structure for the head of the through-flow turbine guide vane shaft of claim 6, wherein a fixing iron post is fixedly installed at the bottom of the cover plate and on the inner side of the sealing insert post.