CN210218689U

CN210218689U - Sealing structure of stirrer of slurry tower of slurry pool

Info

Publication number: CN210218689U
Application number: CN201920789061.9U
Authority: CN
Inventors: Shengji Zou; 邹盛基
Original assignee: Dongguan Jinzhou Paper Industry Co Ltd
Current assignee: Dongguan Jinzhou Paper Industry Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-03-31
Anticipated expiration: 2029-05-28

Abstract

The utility model relates to a liquid and thick liquids stirring machine tool field, concretely relates to thick liquid pond thick liquid tower agitator seal structure, include the packing seal to thick liquid pond thick liquid tower and agitator spindle seal, the packing seal includes the filler box body, is close to the one end that the axle sleeve that packs in the outside of agitator spindle and is located the inside of thick liquid pond thick liquid tower and is equipped with the distance pipe, and thick liquid pond thick liquid tower agitator seal structure still includes labyrinth seal, and labyrinth seal is including the quiet ring that has first wall body and inlay the rotating ring that has the second wall body in quiet intra-annular, forms the clearance between first wall body and the second wall body, and the clearance is labyrinth passageway shape. The stirrer main shaft has a double-layer sealing effect through labyrinth sealing and filler sealing, the sealing effect is enhanced, and a bearing point is added to the stirrer main shaft due to the addition of labyrinth ring sealing, so that the rotating bearing protection effect is achieved when the radial runout of the main shaft is large or blades are accidentally broken, and the temporary halt caused by mechanical equipment faults is reduced.

Description

Sealing structure of stirrer of slurry tower of slurry pool

Technical Field

The utility model relates to a liquid and thick liquids stirring machine tool field especially relates to a thick liquid pond thick liquid tower agitator seal structure.

Background

The sealing of the slurry pool and slurry tower stirrers in the papermaking industry mostly adopts a packing chamber with packing and a water ring cooling and sealing device, so that leakage is easy to occur in the production and use processes, the liquid level is more serious when the slurry tower with the liquid level being more than 10 meters is used, the slurry in the pool tower is greatly lost from the sealing position of the stirrers, and the field working environment is severe. There are three possible causes of leakage: firstly, the radial run-out of the rotating main shaft is large due to factors such as unbalance of rotor blades in the slurry stirring process, and the packing sealing difficulty is increased; secondly, the equipment maintainer repeatedly replaces or pre-tightens the packing under the leakage condition, thereby vicious circle quickening the abrasion of the shaft sleeve; thirdly, in order to achieve the stirring effect and ensure the effective length of the shaft extension of the driving shaft, the main shaft rotates to generate inevitable elastic deformation. Due to the superposition of the three conditions, the sealing effect of the slurry pool and the slurry tower stirrer in the papermaking industry is extremely poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims at providing a thick liquid pond thick liquid tower agitator seal structure can solve the problem that the sealed effect of the thick liquid pond of papermaking trade among the prior art, thick liquid tower agitator is not good.

Based on this, the utility model provides a thick liquid pond thick liquid tower agitator seal structure.

The utility model provides a thick liquid pond thick liquid tower agitator seal structure, includes to thick liquid pond thick liquid tower and agitator main shaft seal's packing seal, packing seal is including establishing in proper order the packing axle sleeve in the outside of agitator main shaft, pack and the filler box body the outside of agitator main shaft is close to the packing axle sleeve is located the one end of the inside of thick liquid pond thick liquid tower is equipped with the distance pipe, thick liquid pond thick liquid tower agitator seal structure still includes labyrinth seal, labyrinth seal including the quiet ring that has first wall body with inlay in the quiet intra-annular movable ring that has the second wall body, quiet ring is established the outside of the filler box body, the movable ring is established the outside of distance pipe, first wall body with form the clearance between the second wall body, the clearance is labyrinth passageway shape.

Further, the labyrinth passage comprises at least three annular sealing teeth which are arranged close to the foreign object inlet and are arranged in sequence.

Furthermore, the labyrinth passage also comprises a sealing groove which is arranged at one end of the annular sealing tooth far away from the intrusion port of the foreign object, and the sealing groove changes direction at least four times.

Further, the sealing groove comprises at least five connected sub-channels with different extending directions, and the tail ends of the sub-channels are provided with foreign matter outflow ports.

Furthermore, an included angle between the extending directions of the two connected sub-channels is a right angle.

Further, a depth direction of a foreign object invasion port of the labyrinth passage and a depth direction of the foreign object outflow port are both in accordance with an axial direction of the agitator main shaft.

Furthermore, the movable ring is fixed on the distance tube through screws, and the fixed ring is fixed on the stuffing box body through screws.

The utility model has the advantages that: the stirrer main shaft has a double-layer sealing effect through labyrinth sealing and filler sealing, the sealing effect is enhanced, meanwhile, the labyrinth sealing further improves the sealing effect through annular sealing teeth and a channel type sealing groove, and due to the addition of labyrinth ring sealing, the stirrer main shaft is provided with one more supporting point, so that the rotating supporting protection effect is achieved when the radial runout of the main shaft is large or blades are accidentally broken, and the temporary halt caused by mechanical equipment faults is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

The device comprises a stirrer main shaft 1, a slurry pool slurry tower 2, a packing seal 3, a packing shaft sleeve 31, a packing 32, a packing box 33, a distance pipe 4, a labyrinth seal 5, a static ring 51, a first wall body 511, a moving ring 52, a second wall body 521, a labyrinth passage 53, a foreign matter invasion port 531, an annular seal tooth 532, a seal groove 533 and a foreign matter outflow port 534.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 and fig. 2, a sealing structure of a slurry tank and slurry tower stirrer comprises a slurry tank and slurry tower 2 and a stirrer spindle 1 fixed on the side wall of the slurry tank and slurry tower 2, wherein a filler seal 3 is arranged at the joint of the stirrer spindle 1 and the slurry tank and slurry tower 2 to seal the side walls of the stirrer spindle 1 and the slurry tank and slurry tower 2, the filler seal 3 comprises a filler shaft sleeve 31, a filler 32 and a filler box 33 which are sequentially arranged on the outer side of the stirrer spindle 1, one end of the stirrer spindle 1 located inside the slurry tank and slurry tower 2 is connected with a stirring blade, a distance tube 4 is arranged between the stirring blade located outside the stirrer spindle 1 and one end of the filler shaft sleeve 31 located inside the slurry tank and slurry tower 2, and the distance tube 4 is sleeved on the stirrer spindle 1; the side of the packing seal 3 close to the inside of the pulp chest tower 2 is also provided with a labyrinth seal 5, the labyrinth seal 5 comprises a static ring 51 with a first wall body 511 and a movable ring 52 embedded in the static ring 51 and provided with a second wall body 521, the static ring 51 is arranged on the outer side of the packing box body 33, the movable ring 52 is arranged on the outer side of the distance tube 4, furthermore, the movable ring 52 is provided with a threaded hole which is fixed on the distance tube 4 through a screw, the static ring 51 is also provided with a threaded hole which is fixed on the packing box body 33 through a screw, the movable ring 52 and the static ring 51 are in a rotating body shape, the side of the static ring 51 close to the movable ring 52 is the first wall body 511, the side of the movable ring 52 close to the static ring 51 is the second wall body 521, and a gap is formed between the first wall body 511 and the second wall body 521, and the gap is. The working principle is as follows: the labyrinth seal is between the seal cavity and the rotary main shaft, a series of regular throttling gaps and expansion cavities are formed by a group of seal tooth sheets, and a step-by-step throttling effect is generated through viscous friction of a medium and energy conversion, so that the seal is realized.

The labyrinth passage 53 includes at least three annular seal teeth 532 arranged in series near the foreign object intrusion port 531, in the present embodiment, the number of the annular seal teeth 532 is plural, and in other embodiments, the number of the annular seal teeth 532 may be increased or decreased as required.

The labyrinth passage 53 further includes a sealing groove 533 disposed at the downstream of the annular sealing tooth 532, which is turned at least four times, the sealing groove 533 is communicated with an end of the annular sealing tooth 532 away from the foreign object invasion port 531, the sealing groove 533 includes at least five connected sub-passages with different extending directions, an included angle between the extending directions of the two connected sub-passages is a right angle, and the end of the sub-passage is a foreign object outflow port 534.

The depth direction of the foreign object invasion port 531 of the labyrinth passage 53 and the depth direction of the foreign object outflow port 534 are both coincident with the axial direction of the mixer main shaft 1. The three annular seal teeth 532 are arranged in sequence along the depth direction of the foreign object intruding port 531. The depth direction of the first sub-channel of the 6 sub-channels is perpendicular to the depth direction of the foreign object invasion port 531, the depth direction of the second sub-channel is perpendicular to the depth direction of the first sub-channel (i.e. parallel to the depth direction of the foreign object invasion port 531 and consistent with the axial direction of the main shaft 1 of the stirrer), the depth direction of the third sub-channel is perpendicular to the depth direction of the second sub-channel, and so on, the depth direction of the sixth sub-channel of the 6 sub-channels is consistent with the depth direction of the foreign object outflow port 534 and the axial direction of the main shaft 1 of the stirrer.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a thick liquid pond thick liquid tower agitator seal structure, includes to thick liquid pond thick liquid tower and agitator main shaft seal's packing seal, the packing seal is including establishing in proper order the packing axle sleeve, the packing and the packing letter body in the outside of agitator main shaft, be close to the packing axle sleeve is located the one end of the inside of thick liquid pond thick liquid tower is equipped with distance tube, its characterized in that: slurry pond thick liquid tower agitator seal structure still includes labyrinth seal, labyrinth seal including the quiet ring that has first wall body with inlay in the quiet intra-annular rotating ring that has the second wall body, quiet ring is established the outside of stuffing box body, the rotating ring is established the outside of distance pipe, first wall body with form the clearance between the second wall body, the clearance is labyrinth passageway shape.

2. The sealing structure of the agitator of the pulp-pool pulp tower according to claim 1, characterized in that: the labyrinth passage comprises at least three annular sealing teeth which are arranged at the position close to the foreign object intrusion port and are arranged in sequence.

3. The sealing structure of the agitator of the pulp-pool pulp tower according to claim 2, characterized in that: the labyrinth passage also comprises a sealing groove which is arranged at one end of the annular sealing tooth, which is far away from the intrusion port of the foreign object, and the sealing groove changes direction at least four times.

4. The seal structure of the agitator of the stock chest and the stock tower according to claim 3, wherein: the sealing groove comprises at least five connected sub-channels with different extending directions, and the tail ends of the sub-channels are foreign matter outflow ports.

5. The seal structure of the agitator of the stock chest and the stock tower according to claim 4, wherein: and an included angle between the extending directions of the two connected sub-channels is a right angle.

6. The sealing structure of the agitator of the slurry pool and the slurry tower according to any one of claims 1 to 5, characterized in that: the depth direction of the foreign object invasion port of the labyrinth passage and the depth direction of the foreign object outflow port are both consistent with the axial direction of the stirrer main shaft.

7. The sealing structure of the agitator of the slurry pool and the slurry tower according to any one of claims 1 to 5, characterized in that: the movable ring is fixed on the distance tube through screws, and the static ring is fixed on the stuffing box body through screws.