CN216742821U

CN216742821U - Novel sealing device

Info

Publication number: CN216742821U
Application number: CN202123182415.XU
Authority: CN
Inventors: 付建平; 孙克学; 吴永胜; 黄强; 张建华; 李立乡; 高寒
Original assignee: Jiangsu Turbine Electric Power Technology Co ltd
Current assignee: Jiangsu Turbine Electric Power Technology Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-06-14
Anticipated expiration: 2031-12-17

Abstract

The utility model discloses a novel sealing device, with the cooperation of air preheater casing for sealed inside and outside frequent rotation that runs through in air preheater casing and the dead axle of beating, include: the sealing base is fixedly connected with the air preheater shell, a cover plate is fixedly connected right above the sealing base, a sealing cavity is arranged between the cover plate and the sealing base, the sealing cavity is integrally annularly arranged, a floating sealing assembly matched with the end shaft is arranged in the sealing cavity, the floating sealing assembly is integrally arranged in a disc shape, and the outer diameter of the floating sealing assembly is smaller than the inner diameter of the sealing cavity; the lower surface of the sealing cavity is provided with a sealing channel matched with the floating sealing assembly, a first packing is fixedly connected in the sealing channel, the first packing is slightly higher than the lower surface of the sealing cavity to form packing seal with the floating sealing assembly, a rotation stopping pin is arranged between the floating sealing assembly and the sealing base and matched with the floating sealing assembly, and small-range radial motion is achieved while axial motion is reduced.

Description

Novel sealing device

Technical Field

The utility model relates to a novel sealing device especially relates to sealing device between boiler and air preheater dead axle part sound.

Background

At present, a sealing seat is used for a rotor end shaft of a power station boiler and an air preheater, the sealing seat is used for sealing a movable part penetrating through the inner side and the outer side of an air preheater shell, because the position temperature reaches 400 ℃, the pressure difference exists between the inner side and the outer side, a large amount of smoke dust is contained in a sealing medium, the linkage part penetrating through the inner side and the outer side is frequently rotated or moved, a copper ring is mostly adopted in a conventional sealing mode, the copper ring is easily worn out to form a gap by the shaft diameter of frequent activity, once the gap exists, the smoke dust with high internal pressure can outwards leak through a dynamic gap and a static gap, a large amount of fine sand-shaped smoke dust is carried in leaked air, the copper ring is repeatedly flushed, the leakage gap is gradually increased, the leakage is more serious, the field environment is seriously influenced, and the unit efficiency and safety are even influenced. At present, because the environment of the part is poor, a large amount of smoke dust is contained in sealed air, a movable shaft frequently acts, and the common seal cannot be used for long-term sealing, so that the part is leaked for a long time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can effectively solve above-mentioned technical problem's novel sealing device.

In order to achieve the purpose of the utility model, the following technical proposal is adopted: the utility model provides a novel sealing device, cooperates with the air preheater casing for the sealed end shaft that runs through in the interior and exterior frequent rotation of air preheater casing and beat, a serial communication port, include: the sealing base is fixedly connected with the air preheater shell, a cover plate is fixedly connected right above the sealing base, a sealing cavity is arranged between the cover plate and the sealing base, the sealing cavity is integrally and annularly arranged, a floating sealing assembly matched with an end shaft is arranged in the sealing cavity, the floating sealing assembly is integrally and discoidally arranged, and the outer diameter of the floating sealing assembly is smaller than the inner diameter of the sealing cavity; the sealing chamber lower surface is equipped with one and floating seal assembly complex sealed channel, fixedly connected with a first packing in the sealed channel, a first packing be a little higher than the sealing chamber lower surface with floating seal assembly forms the packing and seals.

Preferably, the floating seal assembly comprises: the end shaft is provided with a floating sealing ring, a brush type sealing ring and a buffer spring from bottom to top in sequence, and the floating sealing ring and the brush type sealing ring are connected with the end shaft through elastic connecting pieces; the floating sealing ring is fixedly connected with the brush type sealing ring through a screw.

Preferably, the elastic connection member comprises: and the second packing is arranged between the floating sealing ring and the end shaft and is used for realizing the elastic connection of the floating sealing ring and the end shaft.

Preferably, the elastic connection member includes: the brush teeth are arranged between the end shaft and the brush sealing rings, and the brush sealing rings are elastically connected with the end shaft through the brush teeth.

Preferably, a rotation stopping pin is fixedly connected in the sealing cavity, and the floating sealing ring is provided with a stopping groove matched with the rotation stopping pin.

Preferably, the cover plate and the bottom plate are both composed of two semicircular assembling plates, and the two semicircular assembling plates are fixedly connected with the bolt hangers through locking bolts.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. through apron and seal base and the elastic fit of floating seal subassembly, improve holistic leakproofness, do not influence the activity between sound simultaneously, can stop the air current and leak from fit clearance, can make sealed the effect of keeping stable for a long time.

2. The cover plate and the sealing base are designed into two halves, so that the installation and later-period maintenance are facilitated.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below.

Fig. 1 is a sectional view of the overall structure of the novel sealing device according to the embodiment of the present invention;

fig. 2 is a plan view of the overall structure of the novel sealing device according to the embodiment of the present invention.

Description of the figures

1. The air preheater comprises an air preheater shell 2, a sealing base 3, a cover plate 4, a first screw 5, a floating sealing ring 6, a brush type sealing ring 7, a brush type tooth 8, an end shaft 9, a buffer spring 10, a second packing 11, a second screw 12 and a first packing.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 and 2, a novel sealing device, which is matched with an air preheater housing 1 and used for sealing an end shaft 8 which frequently rotates and jumps inside and outside the air preheater housing 1, comprises: and the sealing base 2 is fixedly connected with the air preheater shell 1, and a cover plate 3 is fixedly connected right above the sealing base 2 through a first screw 4.

In order to facilitate installation and replacement, the cover plate 3 which is inconvenient to be sleeved and the sealing base 2 are respectively composed of two semicircular assembling plates, and the two semicircular assembling plates are fixedly connected with the bolt hangers through locking bolts.

A sealing cavity is arranged between the cover plate 3 and the sealing base 2, the sealing cavity is integrally arranged in an annular mode, and the outer side wall of the end shaft 8 is sleeved with the sealing base 2 and the cover plate 3.

The sealing cavity is internally matched with a floating sealing assembly, the sealing base 2 and the cover plate 3 are elastically matched with the end shaft 8 through the floating sealing assembly, the floating sealing assembly adopts a combined floating sealing structure, the floating sealing assembly is integrally arranged in a disc shape, the outer diameter of the floating sealing assembly is smaller than the inner diameter of the sealing cavity, and the floating sealing assembly is smaller than the inner diameter of the sealing cavity and can radially move in the sealing cavity within a small range when being matched with the end shaft 8.

The sealing cavity is internally and fixedly connected with a rotation stopping pin, the floating sealing ring 5 is provided with a locking groove matched with the rotation stopping pin, the locking groove can be set to be a strip-shaped groove perpendicular to the rotation center of the end shaft 8, the rotation stopping pin can move towards the rotation center of the end shaft 8 or move away from the rotation center along the locking groove, and the locking groove and the rotation stopping pin are matched to realize the eccentric movement of the floating sealing assembly and simultaneously do not rotate along with the end shaft 8.

The floating seal assembly includes: by supreme floating seal ring 5, brush sealing ring 6 and buffer spring 9 of being equipped with in proper order down, floating seal ring 5 and brush sealing ring 6 are connected through elastic connection spare between 8 with the end axle, and floating seal ring 5 passes through second screw 11 fixed connection with brush sealing ring 6.

The elastic connecting piece includes: install in the second packing 10 between floating seal ring 5 and end shaft 8, the second packing 10 realizes floating seal ring 5 and 8 elastic connection of end shaft, thereby brush sealing ring 6 passes through

second screw

11 and 5 cooperations of floating seal ring compaction second packing 10.

The elastic connecting piece includes: the brush teeth 7 are arranged between the end shaft 8 and the brush sealing ring 6, and the brush teeth 7 realize elastic connection between the brush sealing ring 6 and the end shaft 8.

The lower surface of the sealing chamber is provided with a sealing channel matched with the floating sealing assembly, a first packing 12 is fixedly connected in the sealing channel, and the first packing 12 is slightly higher than the lower surface of the sealing chamber and matched with the floating sealing assembly to realize that the bottom of the sealing chamber is sealed.

As shown in fig. 1 and 2, in operation, the sealing base 2 is fixedly connected with the air preheater shell 1, the first packing 12 is placed in the sealing groove, the floating sealing ring 5 is placed on the first packing 12, and the floating sealing ring 5 and the brush type sealing ring 6 are fixed and compacted by the second screw 11 to form the second packing 10.

And finally, the cover plate 3 is fixedly connected with the sealing base 2 through the first screws 4, and the floating sealing assembly and the first disk root 12 are driven to be compacted by the spring through adjusting the first screws 4.

Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.

Claims

1. The utility model provides a novel sealing device, cooperates with the air preheater casing for the sealed end shaft that runs through in the interior and exterior frequent rotation of air preheater casing and beat, a serial communication port, include: the sealing base is fixedly connected with the air preheater shell, a cover plate is fixedly connected right above the sealing base, a sealing cavity is arranged between the cover plate and the sealing base, the sealing cavity is integrally and annularly arranged, a floating sealing assembly matched with an end shaft is arranged in the sealing cavity, the floating sealing assembly is integrally and discoidally arranged, and the outer diameter of the floating sealing assembly is smaller than the inner diameter of the sealing cavity; the sealing chamber lower surface is equipped with one and floating seal assembly complex sealed channel, fixedly connected with a first packing in the sealed channel, a first packing be a little higher than the sealing chamber lower surface with floating seal assembly forms the packing and seals.

2. The novel seal of claim 1, wherein said floating seal assembly comprises: the end shaft is provided with a floating sealing ring, a brush type sealing ring and a buffer spring from bottom to top in sequence, and the floating sealing ring and the brush type sealing ring are connected with the end shaft through elastic connecting pieces; the floating sealing ring is fixedly connected with the brush type sealing ring through a screw.

3. The novel sealing device of claim 2, wherein the resilient connector comprises: and the second packing is arranged between the floating sealing ring and the end shaft and is used for realizing the elastic connection of the floating sealing ring and the end shaft.

4. The novel sealing device of claim 2, wherein the resilient connector comprises: the brush teeth are arranged between the end shaft and the brush sealing rings, and the brush sealing rings are elastically connected with the end shaft through the brush teeth.

5. The novel sealing device as claimed in claim 2, wherein a rotation stop pin is fixedly connected in the sealing chamber, and the floating sealing ring is provided with a stop groove matched with the rotation stop pin.

6. The novel sealing device as claimed in claim 1, wherein the cover plate and the bottom plate are both composed of two semicircular assembling plates, and the two semicircular assembling plates are fixedly connected with the bolt lugs through locking bolts.