CN106946001B

CN106946001B - Bearing seat for coal feeder

Info

Publication number: CN106946001B
Application number: CN201710296172.1A
Authority: CN
Inventors: 张兆根
Original assignee: Guangzhou Kam Hing Textile Dyeing Co ltd
Current assignee: Guangzhou Kam Hing Textile Dyeing Co ltd
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2023-05-12
Anticipated expiration: 2037-04-28
Also published as: CN106946001A

Abstract

The invention discloses a bearing seat for a coal feeder, which comprises a body connected with the coal feeder, wherein the body is provided with a shaft hole for accommodating a rotating shaft of the coal feeder, one end of the shaft hole, which is opposite to the coal feeder, is provided with a bearing hole, the wall of the shaft hole is provided with a first annular groove surrounding the rotating shaft, the first annular groove is arranged on one side of the bearing hole, which is opposite to the coal feeder, graphite is filled in the first annular groove, and the graphite is attached to the radial outer surface of the rotating shaft. The bearing seat for the coal feeder prevents coal dust from entering the bearing, prolongs the service life of the bearing, avoids the locking or breaking of a rotating shaft and ensures the normal operation of the coal feeder.

Description

Bearing seat for coal feeder

Technical Field

The invention relates to a bearing seat, in particular to a bearing seat for a coal feeder.

Background

In the prior art, a thermal power plant mostly burns a large amount of coal to heat water into high-temperature and high-pressure water vapor, and then the water vapor pushes blades of a generator to rotate to generate electricity. In order to improve the combustion speed and the utilization efficiency of coal, coal blocks are firstly ground into coal dust and then conveyed to a boiler for combustion by a coal feeder. Fig. 1 shows a conventional coal feeder, which comprises a cylindrical machine body 40, wherein a feed inlet 41, a discharge outlet 42 and a rotating shaft 9 for conveying coal dust are arranged on the machine body 40, a blade 44 is arranged on the rotating shaft 9, the rotating shaft 9 rotates to drive the blade 44 to move, and the blade 44 conveys the coal dust from the feed inlet 41 to the discharge outlet 42. One end of the rotating shaft 9 is connected with the power piece 43, the other end is connected with a bearing seat arranged on the machine body 40, and a bearing 10 is arranged in the bearing seat under normal conditions. The bearing 10 supports the rotation shaft 9 while not affecting the rotation of the rotation shaft 9. However, the pulverized coal formed by grinding the coal briquette is fine and has high temperature, when the pulverized coal enters the bearing seat, the movement resistance of the bearing can be increased, the abrasion is accelerated, the service life is shortened, and even the rotating shaft can be blocked or broken.

Disclosure of Invention

The invention aims to solve the technical problems, and provides a bearing seat for a coal feeder, which is used for preventing coal dust from entering the bearing.

The invention is realized by the following technical scheme:

the utility model provides a bearing frame for feeder, is including the body of connecting the feeder, and the body is provided with the shaft hole of the rotation axis of holding feeder, and the one end that the shaft hole was dorsad to the feeder is provided with the bearing hole, and the pore wall in shaft hole is provided with the first annular of encircling the rotation axis, and first annular sets up in bearing hole one side towards the feeder, and first annular intussuseption is filled with graphite, graphite and the laminating of the radial surface of rotation axis.

Preferably, the hole wall of the shaft hole is provided with a first concave part surrounding the rotating shaft, a sealing ring sleeved on the rotating shaft is arranged in the first concave part, and the first concave part is arranged between the bearing hole and the first annular groove.

Further, a second concave portion is provided at a side of the first concave portion facing the bearing hole, and the second concave portion is used for storing lubricating grease.

Further, the outer surface of the body is provided with an oil filling hole communicated with the second concave part.

Further, the oil filling hole is connected with an oil storage box, the oil storage box comprises a cylindrical inner shell and an outer shell, the outer shell is sleeved on the outer side of the inner shell, the inner shell and the outer shell are connected through threads, and the inner shell or the outer shell is provided with an oil pipe connected with the oil filling hole.

Preferably, the body is provided with a closing cap covering the shaft hole, and the closing cap is connected with the body through threads.

Further, the closing cover is provided with an annular protrusion extending into the bearing hole 4, and the annular protrusion is abutted with the end face edge of the bearing.

The beneficial effects are that: compared with the prior art, the bearing hole is arranged at one end of the shaft hole far away from the coal feeder, so that the bearing is convenient to disassemble, assemble and maintain; the first annular groove and graphite are arranged in the shaft hole, so that coal dust is prevented from entering the bearing, abrasion of the bearing is reduced, the service life of the bearing is prolonged, and the service life of the coal feeder is further prolonged; the first annular groove and the graphite also reduce the heat transferred by the pulverized coal to the lubricating grease in the bearing, so that the lubricating grease is at a normal lubricating temperature; the first annular groove and graphite are arranged to lubricate the surface of the rotating shaft, so that the phenomenon that the rotating shaft is blocked or dead due to the fact that coal dust enters between the rotating shaft and the shaft hole is avoided.

In addition, the first concave part and the sealing ring are arranged, so that graphite, coal dust or scraps are prevented from penetrating into lubricating grease of the bearing, and the service life of the lubricating grease is prolonged; the second concave part is arranged, and the lubricating grease is stored in the second concave part, so that the lubricating requirement of the bearing is met, the heat generated by the running of the bearing can be absorbed, the maintenance period of the bearing is prolonged, and the maintenance work is reduced; by arranging the oil filling hole, lubricating grease is conveniently filled, and the filling operation of the lubricating grease is simplified; by arranging the oil storage box, more lubricating grease can be stored, and metal scraps generated by bearing operation can be collected; by arranging the sealing cover, the influence of external dust on the bearing is avoided; through setting up annular arch, conveniently press people in the bearing hole with the bearing.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the invention, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

FIG. 1 is a schematic view of a conventional coal feeder;

FIG. 2 is a schematic diagram of a first embodiment of the present invention;

FIG. 3 is a schematic diagram of a second embodiment of the present invention;

FIG. 4 is a schematic view of a third embodiment of the present invention;

FIG. 5 is a schematic view of a fourth embodiment of the present invention;

fig. 6 is a schematic partial structure of an expansion scheme of the fourth embodiment of fig. 5.

Detailed Description

As shown in fig. 1, an existing coal feeder comprises a cylindrical machine body 40, wherein a feed inlet 41, a discharge outlet 42 and a rotating shaft 9 for conveying coal dust are arranged on the machine body 40, a blade 44 is arranged on the rotating shaft 9, the rotating shaft 9 rotates to drive the blade 44 to move, and the blade 44 conveys the coal dust from the feed inlet 41 to the discharge outlet 42. One end of the rotating shaft 9 is connected with the power piece 43, the other end is connected with a bearing seat arranged on the machine body 40, and a bearing 10 is arranged in the bearing seat under normal conditions. The bearing 10 supports the rotation shaft 9 while not affecting the rotation of the rotation shaft 9.

In order to solve the problem that the coal powder permeates into the bearing 10 to affect the work of the rotating shaft 9, as shown in fig. 2, a bearing seat for a coal feeder is provided, which comprises a body 1 connected with the coal feeder, wherein the body 1 can be square or cylindrical, the body 1 is provided with a plane attached to the coal feeder, poor sealing between the body 1 and the coal feeder is avoided, and the coal powder is scattered to the outer space of the coal feeder to cause environmental pollution.

The shaft hole 2 is arranged on the joint plane of the body 1 and the coal feeder, the shaft hole 2 is used for supporting the rotating shaft 9 of the coal feeder, in other words, the body 1 is provided with the shaft hole 2 for accommodating the rotating shaft 9 of the coal feeder.

A bearing 10 fitted around the rotary shaft 9 is provided in the shaft hole 2, and the bearing 10 allows the rotary shaft 9 to freely rotate.

The end of the shaft bore 2 facing away from the coal feeder is provided with a bearing bore 4 for receiving the bearing 10, i.e. a bearing bore 4 for mounting the bearing 10. The distance between the bearing 10 and the pulverized coal is increased, so that the pulverized coal penetrating into the bearing 10 is reduced, and the heat transferred from the pulverized coal to the bearing 10 is reduced.

Meanwhile, the inner diameter of the bearing hole 4 is larger than that of the shaft hole 2, so that the bearing 10 is fixed, and the bearing 10 is prevented from moving along the axis direction of the rotating shaft 9.

The body 1 can be further provided with a closing cover 3 for covering the shaft hole 2, so that the influence of external dust on the operation of the bearing 10 is avoided. The edge of the closing cap 3 is provided with a through hole for installing a bolt, and the closing cap 3 is connected with the body 1 in a threaded connection mode.

The closing cap 3 can be provided with an annular bulge 31 extending into the bearing hole 4, and the annular bulge 31 is abutted with the end surface edge of the bearing 10, so that the bearing 10 can be conveniently pressed into the bearing hole 4.

Only a narrow gap which movably sleeves the shaft hole 2 on the rotating shaft 9 is reserved between the inner surface of the shaft hole 2 and the radial outer surface of the rotating shaft 9, the gap is 1-1.5 mm, and the coal dust entering amount is small.

Further, the first shaft 91 is disposed at one end of the rotation shaft 9 facing the body 1, so that the first shaft 91 extends into the shaft hole 2, and a gap of about 1mm is reserved between the end surface of the rotation shaft 9 and the body 1, so that a labyrinth is formed between the rotation shaft 9, the first shaft 91 and the body 1, and coal dust is difficult to enter the bearing 10.

As a further development of the above solution, the wall of the shaft hole 2 may be provided with a first ring groove 5 surrounding the rotation shaft 9, the first ring groove 5 is filled with graphite, and the first ring groove 5 is arranged at one side of the bearing hole 4 facing the coal feeder. The graphite can be granular, and can be plugged into the first annular groove 5 in a paste shape in advance, and can also be formed by splicing a plurality of semi-rings made of graphite.

Graphite surrounds the surface at rotation axis 9, can make the buggy volume that gets into bearing 10 reduce on the one hand, and the heat transfer of separation buggy to the lubricating grease in the bearing 10 simultaneously, and on the other hand graphite good lubricating property can not exert an influence to the rotation of rotation axis 9, and the scratch and the damage on rotation axis 9 surface also significantly reduce.

With the long-term use of the coal feeder, the abrasion inevitably exists between the rotating shaft 9 and the shaft hole 2, in order to prevent ultrafine scraps generated by the abrasion from penetrating into the bearing 10, as shown in fig. 3, as a further development of the scheme, a first concave part 6 can be further arranged in the shaft hole 2, a sealing ring or an oil seal sleeved on the rotating shaft 9 can be arranged in the first concave part 6, and the first concave part 6 is arranged between the bearing hole 4 and the first annular groove 5. The sealing ring can prevent chips from penetrating into the bearing 10, and prevent lubricating grease of the bearing 10 from leaking out to pollute pulverized coal, and simultaneously make the bearing 10 under-lubricate.

Of course, the arrangement of the sealing ring is not affected by the arrangement of graphite in the first annular groove 5, and depends on the actual condition of the coal feeder.

As a further development of the above, as shown in fig. 4, the side of the first recess 6 facing the bearing hole 4 may be provided with a second recess 7, the second recess 7 being intended for storing lubricating grease. The second concave part 7 stores additional lubricating grease, which not only meets the lubricating requirement of the bearing 10, but also can absorb heat generated by the operation of the bearing 10 and accommodate scraps generated by the operation of the bearing 10, so that the bearing 10 is in a normal working state, thereby prolonging the maintenance period of the bearing 10 and reducing maintenance work.

As shown in fig. 5, as a further development of the above scheme, the outer surface of the body 1 may be provided with an oil filling hole 8 communicating with the second recess 7, so as to facilitate filling of the lubricating grease, simplify the filling operation of the lubricating grease, and detach the bearing housing for adding the lubricating grease to the bearing 10. The oil filling hole 8 may be closed by a plug.

As shown in fig. 6, as a further development of the above scheme, the oil filling hole 8 is connected with an oil storage box 11, the oil storage box 11 includes a cylindrical inner shell 12 and an outer shell 13, the outer shell 13 is sleeved on the outer side of the inner shell 12, the inner shell 12 and the outer shell 13 are connected through threads, the inner shell 12 or the outer shell 13 can be provided with an oil pipe connected with the oil filling hole 8, grease can be injected into the oil filling hole 8 by rotating the outer shell 13 or the inner shell 12, or the grease can be pumped out, and the replacement of the failed grease is completed.

The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and any modifications or equivalent substitutions without departing from the spirit and scope of the present invention should be covered in the scope of the technical solution of the present invention.

Claims

1. The bearing seat for the coal feeder comprises a body (1) connected with the coal feeder, wherein the body (1) is provided with a shaft hole (2) for accommodating a rotating shaft (9) of the coal feeder, and is characterized in that one end of the shaft hole (2) back to the coal feeder is provided with a bearing hole (4), the body (1) is provided with a closing cover (3) for closing the shaft hole (2),

the sealing cover (3) is in threaded connection with the body (1), the sealing cover (3) is provided with an annular bulge (31) extending into the bearing hole (4), the annular bulge (31) is in butt joint with the edge of the end face of the bearing (10), the hole wall of the shaft hole (2) is provided with a first annular groove (5) encircling the rotary shaft (9), the first annular groove (5) is arranged on one side, facing the coal feeder, of the bearing hole (4), graphite is filled in the first annular groove (5), and the graphite is attached to the radial outer surface of the rotary shaft (9); the pore wall of shaft hole (2) is provided with first concave part (6) around rotation axis (9), is provided with the sealing washer of suit in rotation axis (9) in first concave part (6), and first concave part (6) set up between bearing hole (4) and first annular (5), one side of first concave part (6) towards bearing hole (4) is provided with second concave part (7), and second concave part (7) are used for storing lubricating grease, body (1) surface still is provided with oil filler point (8) of intercommunication second concave part (7), oil filler point (8) are connected with oil storage box (11), and oil storage box (11) include tubular inner shell (12) and shell (13), and shell (13) suit is in the outside of inner shell (12), and inner shell (12) and shell (13) pass through threaded connection, and inner shell (12) or shell (13) are provided with the oil pipe that is connected with oil filler point (8), reserve narrow and small gap between the radial surface of shaft hole (2) and rotation axis (9), and this gap is 1 ~ 1.5mm.