CN215058949U - Lower bearing sealing device of vertical mill powder concentrator - Google Patents

Abstract

The utility model discloses a vertical mill powder concentrator lower bearing sealing device belongs to powder concentrator equipment field. It comprises a lower bearing seat; the rotating shaft is matched and rotatably connected with the lower bearing seat; the rotary table is in transmission connection with the top end of the rotating shaft; the rotary table further comprises an upper sealing cover which is a cylindrical cover body with openings at two ends, the outer side of the rotary shaft is vertically sleeved with the upper sealing cover, the top of the upper sealing cover is fixedly connected with the bottom surface of the rotary table, and a gap is reserved between the bottom of the upper sealing cover and the top surface of the lower bearing seat. The utility model discloses a setting of going up the sealed cowling can completely cut off most dust, and the probability in greatly reduced dust gets into the bearing frame has improved sealed effect from this, and then has prolonged the effective life who immediately grinds selection powder machine lower bearing, has simple structure, reasonable in design, easily manufacturing's advantage.

Description

Lower bearing sealing device of vertical mill powder concentrator

Technical Field

The utility model belongs to selection powder machine equipment field, more specifically say, relate to a bearing sealing device under vertical mill selection powder machine.

Background

The vertical mill is a grinding equipment widely used in building material, chemical and iron and steel industries, and is mainly used for grinding, drying and sorting cement raw materials, clinker, raw coal, water granulated slag produced in blast furnace ironmaking in iron and steel plants, and the like. At present, the vertical mill at home and abroad mostly adopts a dynamic and static high-efficiency cage-shaped powder concentrator on a separation device, the powder concentrator mainly comprises a transmission device, a rotating shaft and a cage-shaped rotor, bearing devices are arranged at two ends of the rotating shaft, an upper bearing device is supported at the upper part of a shell and bears the weight of the whole rotor, a lower bearing device is arranged in the shell of the powder concentrator, and a bearing seat of the lower bearing device is fixed by a plurality of support connecting rods. Because the environment temperature in the shell is generally 90-120 ℃, the dust concentration is very high, and the hardness of dust is higher, the working condition environment of the lower bearing device of the powder concentrator is abnormal and severe.

The existing vertical mill powder concentrator lower bearing structure is shown in figure 1, and comprises a lower bearing seat 100, a rotating shaft 200 which is connected with the lower bearing seat 100 in a matched and rotating mode and a rotating disc 300 which is connected to the top end of the rotating shaft 200 in a transmission mode, the lower bearing runs in a dust environment for a long time, dust is easily fed into the lower bearing seat 100, equipment faults are caused, production and running are affected, and maintenance are difficult, a rubber sealing ring is usually arranged on the lower bearing seat 100, but the rubber sealing ring is found in actual production and is easy to age in a high-temperature environment, dust airflow in a mill has certain scouring, the service life of the rubber sealing ring is short, and the sealing effect is not ideal.

Through retrieval, the Chinese patent publication number: CN 103016549B; the publication date is as follows: 22/04/2015; the lower bearing protecting device of the vertical mill powder concentrator comprises a radial labyrinth seal, an oil seal and an annular air duct formed among a bearing seat, a lower cover and an oil storage pool and surrounding the bearing, wherein an air inlet pipe communicated with the annular air duct is fixedly connected to the bearing seat, an annular air outlet communicated with the annular air duct is formed between the lower cover and the oil storage pool, and the air inlet pipe is communicated with the atmosphere; the oil storage pool is fixedly connected to the bearing seat. This application has reduced the temperature of lower bearing department through setting up annular wind channel, though can reduce the ageing that rubber seal got off to a certain extent, improves certain sealed effect, but whole sealed effect is still not ideal.

Disclosure of Invention

In order to solve the above problems, the utility model adopts the following technical proposal.

A lower bearing sealing device of a vertical mill powder concentrator, which comprises,

a lower bearing seat;

the rotating shaft is matched and rotatably connected with the lower bearing seat;

the rotary table is in transmission connection with the top end of the rotating shaft;

further comprising:

the upper sealing cover is a cylindrical cover body with openings at two ends, the outer side of the rotating shaft is vertically sleeved with the upper sealing cover, the top of the upper sealing cover is fixedly connected with the side wall of the rotating shaft, and a gap is reserved between the bottom of the upper sealing cover and the top surface of the lower bearing seat.

The one end welded fastening of going up the sealed cowling is on the carousel bottom surface, and the other end leaves the clearance with the step top surface, prevents to influence the relative rotation of step and rotation axis, through the setting of last sealed cowling, can completely cut off most dust, and greatly reduced dust gets into the probability in the bearing frame, has improved sealed effect from this, and then has prolonged the effective life who immediately grinds selection powder machine lower bearing.

Further, still include the lower sealed cowling, it is the cylindric cover body of both ends open-ended, and the rotation axis outside is located to vertical cover, and the bottom and the lower bearing frame top surface fixed connection of lower sealed cowling leave the clearance between lower sealed cowling lateral wall and the last sealed cowling lateral wall.

The lower sealing cover is also fixedly arranged on the top surface of the lower bearing seat, the arrangement of the lower sealing cover is matched with the upper sealing cover, the distance and the difficulty of dust entering the rotating shaft and the lower bearing seat are increased, and therefore the sealing effect is further enhanced.

Further, the outer diameter of the lower sealing cover is smaller than the inner diameter of the upper sealing cover;

and a gap is reserved between the top of the lower sealing cover and the bottom of the upper sealing cover.

Go up the sealed cowling with down the sealed cowling in wherein, the dust is wanted to enter into between step and rotating shaft, the route greatly increased that needs pass through, the dust need be earlier through the clearance of last sealed cowling lower extreme and step top surface, then pass through the clearance between last sealed cowling and lower sealed cowling, then pass through the clearance at lower sealed cowling top and last sealed cowling top, pass through the clearance between lower sealed cowling and rotating shaft again, between the step and rotating shaft can be reachd to the side, through the setting of this scheme, sealing performance obtains very big promotion.

Further, a sealing layer is filled between the outer side wall of the lower sealing cover and the inner side wall of the upper sealing cover.

The sealing layer can be for the wool felt scribble fill under after lubricating grease the space between sealed cowling lateral wall and the last sealed cowling inside wall and form, also can be that the immersion oil packing forms, through the sealing layer of this scheme, can be under the circumstances that does not influence the pivoted, the entering of isolated dust.

Further, still include the sealing ring, it includes:

the lower ring piece is sleeved outside the rotating shaft and fixedly connected with the top surface of the lower bearing seat;

the felt ring is sleeved on the outer side of the rotating shaft and is in contact with the outer side wall of the rotating shaft, and the felt ring is arranged on the top surface of the lower ring piece;

and the upper ring piece is sleeved on the outer side of the rotating shaft, and the fastening piece penetrates through the upper ring piece and the felt ring to fixedly connect the upper ring piece, the felt ring and the lower ring piece.

The sealing ring has set up another sealing measure between step bearing and rotating shaft, and the felt circle contacts with the rotation axis, can not influence the rotation effect, but can effectual isolated dust enter into the bearing frame, and the sealed cowling, lower sealed cowling are gone up in the cooperation, and sealed effect further increases.

Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the lower bearing sealing device of the vertical mill powder concentrator of the utility model can isolate most of dust through the arrangement of the upper sealing cover, thereby greatly reducing the probability of the dust entering the bearing seat, improving the sealing effect and further prolonging the effective service life of the lower bearing of the vertical mill powder concentrator;

(2) the lower bearing sealing device of the vertical mill powder concentrator of the utility model has the advantages that the lower sealing cover is arranged to be matched with the upper sealing cover, so that the distance and the difficulty of dust entering between the rotating shaft and the lower bearing seat are increased, and the sealing effect is further strengthened;

(3) the lower bearing sealing device of the vertical mill powder concentrator of the utility model can isolate the dust from entering without influencing the rotation by filling the sealing layer, thereby greatly improving the sealing effect;

(4) the lower bearing sealing device of the vertical mill powder concentrator of the utility model is characterized in that the sealing ring is provided with another sealing measure between the lower bearing seat and the rotating shaft, and the sealing effect is further increased by matching the upper sealing cover and the lower sealing cover;

(5) the utility model discloses simple structure, reasonable in design easily makes.

Drawings

FIG. 1 is a schematic view of a lower bearing structure of a vertical mill powder concentrator in the prior art;

FIG. 2 is a schematic view of a lower bearing sealing device of the vertical mill powder concentrator according to embodiment 1;

FIG. 3 is a schematic view of a lower bearing sealing device of the vertical mill powder concentrator according to embodiment 3;

FIG. 4 is a schematic view of a lower bearing sealing device of the vertical mill powder concentrator according to embodiment 4;

FIG. 5 is a schematic view of a lower bearing structure of the vertical mill powder concentrator provided with a sealing ring;

fig. 6 is a schematic view of the sealing ring of the present invention;

FIG. 7 is an enlarged view taken at A in FIG. 5;

in the figure:

100. a lower bearing seat;

200. a rotating shaft;

300. a turntable;

1. an upper sealing cover;

2. a lower seal cap; 20. a sealing layer;

3. a seal ring; 30. a lower ring member; 31. a felt loop; 32. an upper ring member; 33. a fastener.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

The lower bearing sealing device of the vertical mill powder concentrator of the embodiment comprises,

a lower bearing housing 100;

a rotating shaft 200 which is connected with the lower bearing block 100 in a matching and rotating manner;

a turntable 300 which is connected to the top end of the rotating shaft 200 in a transmission manner;

further comprising:

the upper sealing cover 1 is a cylindrical cover body with openings at two ends, the outer side of the rotating shaft 200 is vertically sleeved with the upper sealing cover 1, the top of the upper sealing cover 1 is fixedly connected with the side wall of the rotating shaft 200, and a gap is reserved between the bottom of the upper sealing cover 1 and the top surface of the lower bearing pedestal 100.

The existing lower bearing structure of the vertical mill powder concentrator is shown in fig. 1, because the lower bearing seat 100 and the rotating shaft 200 can not be fixed in relative rotation, and dust can easily enter the bearing seat from the rotating shaft 200 to the lower bearing seat 100, therefore, the embodiment is provided with the upper sealing cover 1, as shown in fig. 2, one end of the upper sealing cover 1 is welded and fixed on the side wall of the rotating shaft 200, a gap is reserved between the other end and the top surface of the lower bearing seat 100, the influence on the relative rotation of the lower bearing seat 100 and the rotating shaft 200 is prevented, most of dust can be isolated through the arrangement of the upper sealing cover 1, the probability of dust entering the bearing seat is greatly reduced, the sealing effect is improved, and the effective service life of the lower bearing of the vertical mill powder concentrator is prolonged.

Example 2

The lower bearing sealing device of the vertical mill powder concentrator of the embodiment is further improved on the basis of the embodiment 1, and further comprises a lower sealing cover 2 which is a cylindrical cover body with two open ends and is vertically sleeved outside the rotating shaft 200, the bottom of the lower sealing cover 2 is fixedly connected with the top surface of the lower bearing seat 100, and a gap is reserved between the side wall of the lower sealing cover 2 and the side wall of the upper sealing cover 1.

The lower sealing cover 2 is also fixedly arranged on the top surface of the lower bearing pedestal 100, the arrangement of the lower sealing cover 2 is matched with the upper sealing cover 1, the distance and difficulty of dust entering the rotating shaft 200 and the lower bearing pedestal 100 are increased, and therefore the sealing effect is further enhanced.

Example 3

The sealing device for the lower bearing of the vertical mill powder concentrator is further improved on the basis of the embodiment 2, and the outer diameter of the lower sealing cover 2 is smaller than the inner diameter of the upper sealing cover 1;

and a gap is reserved between the top of the lower sealing cover 2 and the bottom of the upper sealing cover 1.

As shown in fig. 3, the upper sealing cover 1 covers the lower sealing cover 2 therein, the dust is required to enter between the lower bearing seat 100 and the rotating shaft 200, the path that the dust needs to pass through is greatly increased, the dust needs to pass through the gap between the lower end of the upper sealing cover 1 and the top surface of the lower bearing seat 100, then pass through the gap between the upper sealing cover 1 and the lower sealing cover 2, then pass through the gap between the top of the lower sealing cover 2 and the top of the upper sealing cover 1, and then pass through the gap between the lower sealing cover 2 and the rotating shaft 200, so as to reach between the lower bearing seat 100 and the rotating shaft 200, and the sealing performance is greatly improved by the arrangement of the embodiment.

Example 4

The sealing device for the lower bearing of the vertical mill powder concentrator in the embodiment is further improved on the basis of the embodiment 3, and a sealing layer 20 is filled between the outer side wall of the lower sealing cover 2 and the inner side wall of the upper sealing cover 1.

As shown in fig. 4, the sealing layer 20 of this embodiment may be formed by coating wool felt with grease and then filling up a gap between the outer side wall of the lower sealing cover 2 and the inner side wall of the upper sealing cover 1, or may be formed by oil-impregnated packing, and by the sealing layer 20 of this embodiment, dust can be isolated from entering without affecting rotation.

Further, the sealing layer 20 is also filled in the gap between the lower seal cover 2 and the rotary shaft 200, and the sealing effect can be further enhanced.

Example 5

The vertical mill powder concentrator lower bearing sealing device of this embodiment is further improved on the basis of embodiment 4, and further includes a sealing ring 3, which includes:

the lower ring piece 30 is sleeved outside the rotating shaft 200, and the lower ring piece 30 is fixedly connected with the top surface of the lower bearing seat 100;

the felt ring 31 is sleeved outside the rotating shaft 200 and is in contact with the outer side wall of the rotating shaft 200, and the felt ring 31 is arranged on the top surface of the lower ring piece 30;

and the upper ring piece 32 is sleeved on the outer side of the rotating shaft 200, and the fastening piece 33 penetrates through the upper ring piece 32 and the felt ring 31 to tightly connect the upper ring piece 32, the felt ring 31 and the lower ring piece 30.

As shown in fig. 5, 6 and 7, in the seal ring 3 of the present embodiment, another sealing measure is provided between the lower bearing seat 100 and the rotating shaft 200, and the felt ring 31 is in contact with the rotating shaft 200, which does not affect the rotating effect, but can effectively prevent dust from entering the bearing seat, and the sealing effect is further increased by matching with the upper seal cover 1 and the lower seal cover 2.

Further, the fastening member 33 of the present embodiment is a bolt, the bolt penetrates through the upper ring member 32, the felt ring 31 and the lower ring member 30 to fasten the three members, and the lower ring member 30 is also fixedly connected to the top surface of the lower bearing seat 100 by the bolt.

The sealing device for the lower bearing of the vertical mill powder concentrator is applied to actual production, runs for two years, and is disassembled to confirm that the bearing seat is full of grease and no dust enters.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims (5)

1. A lower bearing sealing device of a vertical mill powder concentrator, which comprises,

a lower bearing seat;

the rotating shaft is matched and rotatably connected with the lower bearing seat;

the rotary table is in transmission connection with the top end of the rotating shaft;

it is characterized by also comprising:

the upper sealing cover is a cylindrical cover body with openings at two ends, the outer side of the rotating shaft is vertically sleeved with the upper sealing cover, the top of the upper sealing cover is fixedly connected with the side wall of the rotating shaft, and a gap is reserved between the bottom of the upper sealing cover and the top surface of the lower bearing seat.

2. The lower bearing sealing device of the vertical mill powder concentrator according to claim 1, characterized in that: the lower sealing cover is a cylindrical cover body with openings at two ends, the outer side of the rotating shaft is vertically sleeved with the lower sealing cover, the bottom of the lower sealing cover is fixedly connected with the top surface of the lower bearing seat, and a gap is reserved between the side wall of the lower sealing cover and the side wall of the upper sealing cover.

3. The lower bearing sealing device of the vertical mill powder concentrator according to claim 2,

the outer diameter of the lower sealing cover is smaller than the inner diameter of the upper sealing cover;

and a gap is reserved between the top of the lower sealing cover and the bottom of the upper sealing cover.

4. The lower bearing sealing device of the vertical mill powder concentrator according to claim 3, characterized in that: and a sealing layer is filled between the outer side wall of the lower sealing cover and the inner side wall of the upper sealing cover.

5. A lower bearing sealing device of a vertical mill powder concentrator as claimed in any one of claims 1 to 4, further comprising a sealing ring, comprising:

the lower ring piece is sleeved outside the rotating shaft and fixedly connected with the top surface of the lower bearing seat;

the felt ring is sleeved on the outer side of the rotating shaft and is in contact with the outer side wall of the rotating shaft, and the felt ring is arranged on the top surface of the lower ring piece;

and the upper ring piece is sleeved on the outer side of the rotating shaft, and the fastening piece penetrates through the upper ring piece and the felt ring to fixedly connect the upper ring piece, the felt ring and the lower ring piece.

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