【DESCRIPTION】
【Technical Field】
The present disclosure relates to a driving part
sealing device for sealing a structure (container) into
which a driving shaft is inserted, and more particularly,
to a driving part sealing device for effectively sealing a
structure (container) such as a bin or hopper into which a
driving shaft of a screw feeder is inserted, while
absorbing vibrations (shaking) of the driving shaft and
suppressing abrasion thereof by absorbing rotations
(rotational force) and providing sealing through an
alternately arranged ring structure.
【Background Art】
Most ironworks use a blast furnace method to produce
molten iron. In the blast furnace method, sintered iron
ore is inserted into a blast furnace together with coke
made of bituminous coal and is reduced to iron. However,
the blast furnace method requires raw-material pretreatment
equipment such as sintering equipment, incurring
considerable equipment construction and maintenance costs.
In addition, separate equipment is required for the
treatment of contaminants.
3
Therefore, research has been conducted to develop
processes for producing molten iron using steam coal as a
fuel and reductant and fine iron ore accounting for 80% or
more of the global output of iron ore as an iron source
without pre-treating the fine iron ore, and many efforts
have been made to put the processes to practical use and
improve the efficiency of the processes.
For example, US Patent No. 5,534,046 discloses an
apparatus for producing molten iron using steam coal and
fine iron ore. In short, the apparatus includes: multistage
fluidized reduction furnaces in which bubble
fluidized beds are formed; and a melter-gasifier connected
to the fluidized reduction furnaces. While fine iron ore
and sub raw materials kept at room temperature are inserted
into the first fluidized reduction furnace and transferred
to the following fluidized reduction furnaces, a hightemperature
reducing gas is supplied to the fluidized
reduction furnaces from the melter-gasifier so as to heat,
fire, and reduce the fine iron ore and sub raw materials,
and then the reduced fine iron ore and sub raw materials
are supplied to the melter-gasifier.
Here, the fine iron ore and sub raw materials reduced
in the fluidized reduction furnace may be agglomerated into
lumps before being supplied to the melter-gasifier to
4
improve the air and liquid permeability of a coal layer of
the melter-gasifier.
For example, US Patent No. 5,666,638 discloses an
apparatus in which reduced fine iron ore and sub raw
materials are agglomerated into lumps (briquettes) and then
supplied to a melter-gasifier.
In detail, a screw feeder is disposed in a bin (or
hopper) so that desired amounts of reduced iron ore and sub
raw materials can be supplied from the bin to a lump iron
ore manufacturing apparatus using the screw feeder, and a
sealing structure is formed on a bin structure in which a
driving shaft of the screw feeder is inserted for sealing
of the inside of the bin and thus keeping the inside of the
bin under high-pressure, high-temperature conditions.
In a molten iron producing apparatus including a lump
iron ore manufacturing unit (not shown), a shaft of a screw
feeder of a bin of the lump iron manufacturing unit may be
sealed with a sealing member such as an O-ring. However,
since the O-ring is a line-contact sealing member, sealing
may not be stably maintained.
Particularly, when the shaft of the screw feeder is
rotated by an external driving unit such as a motor, the
sealing member may be considerably vibrated (shaken) and
thus may be damaged and shortened in lifespan, thereby
5
causing problems such as poor sealing, frequent replacement
of the sealing member, and a low operational rate of the
screw feeder.
【Disclosure】
【Technical Problem】
An aspect of the present disclosure may provide a
driving part sealing device for effectively sealing a
structure (container) such as a bin or hopper into which a
driving shaft of a screw feeder is inserted, while
absorbing vibrations (shaking) of the driving shaft and
suppressing abrasion by absorbing rotations (rotational
force) and providing sealing through an alternately
arranged ring structure.
【Technical Solution】
According to an aspect of the present disclosure, a
sealing device for a driving part may include: a structure
mounting member mounted on a structure and receiving the
driving part therein; a driving part fixing member
disposed on the structure mounting member and fixed to the
driving part for sealing the driving part inserted
thereinto; and a rotation absorbing part provided between
the driving part fixing member and the structure mounting
member for absorbing rotations using a relational structure.
The structure mounting member may be a structure
6
mounting ring coupled to the structure.
The driving part fixing member may include a
plurality of driving part fixing rings assembled to
transmit rotational force through a rotation transmitting
part.
The rotation transmitting part may include at least
one of: a first rotation transmitting part including a pin
inserted into at least one pin hole formed in the driving
part fixing rings; and a second rotation transmitting part
including a protrusion inserted into at least one recess
formed in the driving part fixing rings.
The first and second rotation transmitting parts may
be sequentially arranged on the driving part fixing rings.
The sealing device may further include a guide groove
and a guide ring provided on the driving part fixing rings,
or stepped portions formed on edge portions of the driving
part fixing rings making contact with each other.
The rotation absorbing part may include rings
arranged alternately on the driving part fixing member and
the structure mounting member so as to absorb rotation of
the driving part.
The rings of the rotation absorbing part may include
at least one convex ring and at least one concave ring
arranged at corresponding positions, and the convex ring
7
and the concave ring may be correspondingly arranged on one
of the driving part fixing rings of the driving part fixing
member and the structure mounting ring adjacent to the
driving part fixing ring.
The sealing device may further include a vibration
absorbing part disposed between the driving part fixing
rings to absorb vibrations or shaking when the driving part
is rotated.
The vibration absorbing part may be a coil spring
disposed in a hole formed in the driving part fixing rings,
and the coil spring may be adjusted in elasticity by using
a pressing bolt inserted into the driving part fixing rings.
The sealing device may further include a clamping
part connected between the driving part fixing member and
the structure mounting member or the structure for being
used when the sealing device is installed on the structure.
The clamping part may include: a clamping bar
horizontally fixed to an upper side of the driving part
fixing member; and a clamping bolt inserted into the
clamping bar and coupled to the clamping bar and the
structure mounting member or the structure.
A fastener fixed to the driving part may be coupled
to at least one of the driving part fixing rings of the
driving part fixing member, and at least one sealing member
8
may be provided on at least one of the structure mounting
member and the driving part fixing member for sealing
between the driving part and the sealing device.
The sealing device may further include at least one
of a lubricant supply unit and a gas supply unit connected
to the rotation absorbing part for suppressing abrasion or
maintaining sealing.
The structure may be a bin or hopper including a
screw feeder, and the driving part may be a driving shaft
of the screw feeder.
Additional aspects will be set forth in part in the
description which follows and, in part, will be apparent
from the description, or may be learned by practice of the
embodiments.
【Advantageous Effects】
According to embodiments of the present disclosure,
the sealing device may effectively seal a structure to
which a driving part such as a driving shaft is connected
and may reduce abrasion of sealing components to increase
the lifespan of the sealing device or the structure.
For example, the sealing device may be used in a
container such as a bin or hopper including a screw feeder
or a pressure-resistant structure in which a large amount
of dust is generated at high temperature, so as to provide
9
stable sealing between the container or structure and a
screw feeder driving part (shaft) inserted into the
container or structure.
In addition, the sealing device may absorb
operational vibrations and suppress abrasion by absorbing
rotations using an alternately arranged ring structure.
Therefore, the sealing device of the present
disclosure may provide improved sealing and abrasionsuppressing
effects.
【Description of Drawings】
FIG. 1 is a view illustrating a molten iron producing
apparatus including a lump iron ore manufacturing unit as
an exemplary unit in which a driving part sealing device is
installed according to an embodiment of the present
disclosure.
FIG. 2 is a view illustrating a bin (hopper)
including a screw feeder and disposed in the lump iron ore
manufacturing unit shown in FIG. 1, the driving part
sealing device of the embodiment of the present disclosure
being installed on the screw feeder.
FIG. 3 is a view illustrating the driving part
sealing device installed on the screw feeder of the bin
according to the embodiment of the present disclosure.
FIG. 4 is a perspective view illustrating an
10
assembled state of the driving part sealing device
according to the embodiment of the present disclosure.
FIG. 5 is an exploded perspective view illustrating
the driving part sealing device shown in FIG. 4 according
to the embodiment of the present disclosure.
FIG. 6 is a cross-sectional view illustrating the
driving part sealing device shown in FIG. 4 according to
the embodiment of the present disclosure.
【Best Mode】
Hereinafter, embodiments of the present disclosure
will be described with reference to the accompanying
drawings.
FIGS. 1 to 3 are schematic views illustrating a
molten iron producing apparatus 100 for producing molten
iron using steam coal and fine iron ore. The molten iron
producing apparatus 100 includes a lump iron ore
manufacturing unit 130, and a driving part sealing device 1
(refer to portion A of FIG. 3) of the present disclosure is
installed on a screw feeder 136 of a bin 138 of the lump
iron ore manufacturing unit 130.
For example, as shown in FIG. 1, the molten iron
producing apparatus 100 for producing molten iron using
steam coal and fine iron ore may include a plurality of
reducing furnaces 110, the lump iron ore manufacturing unit
11
130, a lump iron ore storage tank 150, and a melting
furnace 170. The structure of the molten iron producing
apparatus 100 is known in the related art.
As described above, iron reduced in the reducing
furnaces 110 is agglomerated into lumps 130a (refer to FIG.
2) in the lump iron ore manufacturing unit 130 so as to
improve gas permeability in the melting furnace 170.
As shown in FIGS. 2 and 3, the lump iron ore
manufacturing unit 130 includes: a storage tank 132 into
which fine iron ore reduced in the reducing furnaces 110 is
transferred by a pressure difference; an agglomeration
machine 134 configured to agglomerate fine iron ore into
lumps 130a by pressing the fine iron ore; the bin 138
disposed above the agglomeration machine 134 and including
the screw feeder 136 to uniformly feed fine iron ore to the
agglomeration machine 134; and a crusher 140 configured to
crush lumps 130a into desired sizes. In the lump iron ore
manufacturing unit 130, iron ore lumps 130a are transferred
from the agglomeration machine 134 to a conveyer 143
through a distributor 141 and a screen 142.
Referring to FIG. 1, fine iron ore is transferred by
a high-pressure gas within a temperature range of 600°C to
700°C along the reducing furnaces 110, the lump iron ore
manufacturing unit 130, the lump iron ore storage tank 150,
12
and the melting furnace 170.
The lump iron ore storage tank 150 temporarily stores
iron ore lumps and supplies the iron ore lumps to the
melting furnace 170. In addition, the molten iron
producing apparatus 100 may further include a dust
collecting unit 190.
FIG. 3 illustrates the bin 138 and the agglomeration
machine 134. The screw feeder 136 is disposed in the bin
138.
The driving part sealing device 1 is disposed in a
structural part (for example, portion A in FIG. 3) of the
bin 138 into which a driving shaft 136a of the screw feeder
136 is inserted. The driving part sealing device 1 will be
described in detail with reference to FIGS. 4 to 6.
Since (fine) iron ore and steam coal are transferred
in the molten iron producing apparatus 100 by a difference
in gas pressure, the driving part sealing device 1 of the
embodiment of the present disclosure is disposed in a
portion of the bin 138 into which the driving shaft 136a of
the screw feeder 136 is inserted, so as to provide sealing
against high-pressure and high-temperature environments.
Particularly, the driving part sealing device 1 may absorb
vibrations or shaking (chattering) of the driving shaft
136a and may effectively absorb the rotations of the
13
driving shaft 136a to reduce wearing.
The driving part sealing device 1 will now be
described in more detail with reference to FIGS. 4 to 6
according to the embodiment of the present disclosure.
In the following description of the embodiment of the
present disclosure given with reference to FIGS. 1 to 3,
the driving part sealing device 1 is disposed on the
driving shaft 136a of the screw feeder 136 installed in the
bin 138 of the lump iron ore manufacturing unit 130 of the
molten iron producing apparatus 100 so as to seal the bin
138. However, the driving part sealing device 1 of the
embodiment of the present disclosure is not limited thereto.
For example, the driving part sealing device 1 may be
used to seal a (airtight) container such as a bin or hopper
into which a screw feeder is installed to uniformly
discharge a stock such as powder or grain by using
compressed air or gas.
The driving part sealing device 1 of the embodiment
of the present embodiment is not limited as being disposed
on a driving shaft of a screw feeder. For example, the
driving part sealing device 1 of the embodiment of the
present disclosure may be disposed on a structural part of
an airtight container into which a driving unit (driving
shaft) is inserted, so as to seal an internal gas or powder
14
atmosphere of the container.
That is, it may be understood that the driving part
sealing device 1 is used to seal a structure 10 in which a
driving part 12 is disposed. In the following description,
the structure 10 is the bin 138, and the driving part 12 is
the driving shaft 136a of the screw feeder 136.
Referring to FIGS. 4 to 6, the driving part sealing
device 1 of the embodiment of the present disclosure may
include: a structure mounting member 20 through which the
driving part 12 shaped like a rod or pipe may be inserted;
a driving part fixing member 30 placed on the structure
mounting member 20 to fix and seal the driving part 12
inserted thereinto; and a rotation absorbing part 40
disposed between the structure mounting member 20 and the
driving part fixing member 30 to absorb the rotation of the
driving part 12.
According to the embodiment of the present disclosure,
the driving part fixing member 30 is fixed to the driving
part 12 inserted into the structure 10 and is rotated
together with the driving part 12 when the driving part 12
is rotated. The structure mounting member 20 is mounted on
the structure 10, and the rotation absorbing part 40 is
formed between the structure mounting member 20 and the
driving part fixing member 30 to absorb the rotation of the
15
driving part 12 and the driving part fixing member 30 while
providing stable sealing. Particularly, the rotation
absorbing part 40 has an alternating structure (described
later in detail) for providing stable sealing while
reducing abrasion.
According to the embodiment of the present disclosure,
the structure mounting member 20 of the driving part
sealing device 1 is detachably mounted on the structure 10
such as the bin 138 as shown in FIGS. 4 to 6. The
structure mounting member 20 may be a mounting ring having
a driving part opening 22 through which the driving part 12
is inserted.
In the following description, the structure mounting
member 20 is taken as a structure mounting ring.
The structure mounting ring 20 has a circular ring
shape with the driving part opening 22, and the driving
part 12 such as the driving shaft 136a of the screw feeder
136 is inserted into the opening 22 and a driving part
opening 14 formed in the structure 10.
A plurality of bolt holes 20a are formed along the
circumference of the structure mounting ring 20, and thus
bolts 24 may be inserted into the bolt holes 20a and
coupled to a bracket or base 10a of the structure 10 to
detachably fix the structure mounting ring 20 to the
16
structure 10.
As shown in FIGS. 4 to 6, the driving part fixing
member 30 of the driving part sealing device 1 may include
a plurality of driving part fixing rings by which
rotational force can be transmitted through a rotation
transmitting part 50 (described later).
In detail, for example, the driving part fixing
member 30 may include first, second, and third fixing rings
32, 34, and 36 sequentially arranged in a downward
direction along the driving part 12. The number of the
first to third fixing rings 32, 34, and 36 may be varied.
In the embodiment shown in FIGS. 4 to 6, the driving
part fixing member 30 includes the first to third fixing
rings 32, 34, and 36. However, the third fixing ring 36
may not be used, or may be formed of a material different
from a material used to form the structure mounting ring 20.
For example, the first and second fixing rings 32 and
34 may be provided to install a vibration absorbing part 60
(described later). In addition, the second and third
fixing rings 34 and 36 may be provided as a single part.
If the third fixing ring 36 is formed of the same
material as that used to form the structure mounting ring
20, when the driving part sealing device 1 of the
embodiment is used in the bin 138 of the lump iron ore
17
manufacturing unit 130 of the molten iron producing
apparatus 100 shown in FIGS. 1 to 3, the third fixing ring
36 and the structure mounting ring 20 may be easily
affected by a high temperature environment inside the bin
138 because the third fixing ring 36 and the structure
mounting ring 20 have the same melting point. Therefore,
the third fixing ring 36 may be formed of a material
capable of easily dissipating heat such as copper, and the
structure mounting ring 20 may be formed of a material
different from the material of the third fixing ring 36.
In this case, the second and third fixing rings 34 and 36
may be provided as individual parts.
That is, in the embodiment of the present disclosure,
the driving part fixing member 30 may include the first and
second fixing rings 32 and 34 in which the vibration
absorbing part 60 is disposed, and may further include the
third fixing ring 36 formed of a material different from a
material of the structure mounting ring 20.
If the driving part fixing member 30 includes only
the first and second fixing rings 32 and 34, the rotation
transmitting part 50 (described later in more detail) may
include a first rotation transmitting part 52, and if the
driving part fixing member 30 includes all the first to
third fixing rings 32, 34, and 36, the rotation
18
transmitting part 50 may include first and second rotation
transmitting parts 52 and 54.
In other words, the driving part fixing member 30 of
the embodiment of the present disclosure may include only
the first and second fixing rings 32 and 34 or all the
first to third fixing rings 32, 34, and 36.
In the case in which the driving part sealing device
1 is used for the bin 138 of the molten iron producing
apparatus 100 shown in FIGS. 1 to 3, the first to third
fixing rings 32, 34, and 36 of the driving part fixing
member 30 may include cooling structures for circulating a
coolant.
The following description of the embodiment of the
present disclosure will be given for the case in which the
driving part fixing member 30 includes all the first to
third fixing rings 32, 34, and 34.
The first to third fixing rings 32, 34, and 36 are
brought into contact with each other and are fixed. For
example, the first and second fixing rings 32 and 34 or the
first to third fixing rings 32, 34, and 36 are brought into
contact with each other and assembled as shown in FIG. 4.
In this state, fasteners such as set bolts 16 are inserted
into screw holes 32b formed at regular intervals in a ridge
of the first fixing ring 32 and fixed to the driving part
19
12 such as the driving shaft 136a inserted into the first
to third fixing rings 32, 34, and 36.
After the first fixing ring 32 is fixed to the
driving part 12, the first to third fixing rings 32, 34,
and 36 are sequentially brought into contact with each
other and assembled, and the third fixing ring 36 is
disposed on the structure mounting ring 20. This contact
state (assembled state) of the structure mounting ring 20
and the first to third fixing rings (driving part fixing
rings) 32, 34, and 36 may be maintained because the
position of the driving part 12 such as the driving shaft
136a is fixed in the structure 10.
At this time, while inserting the driving part 12
into the structure 10, the structure mounting ring 20 and
the fixing rings 32, 34, and 36 of the driving part sealing
device 1 may be easily assembled and mounted on the
structure 10 by using a clamping part 70 (to be described
later).
As shown in FIGS. 4 to 6, in the embodiment of the
present disclosure, the rotation transmitting part 50 may
include the first rotation transmitting part 52, and the
first rotation transmitting part 52 may include pins 52b
inserted into pin holes 52a formed in the first and second
fixing rings 32 and 34 of the driving part fixing member 30.
20
In addition, the rotation transmitting part 50 may
include the second rotation transmitting part 54, and the
second rotation transmitting part 54 may include
protrusions 54a and recesses 54b formed at positions
corresponding to those of the second and third fixing rings
34 and 36.
The number of the first and second rotation
transmitting parts 52 and 54 may be varied according to the
number of the first to third fixing rings 32, 34, and 36.
In other words, the rotation transmitting part 50 may
include only one of the first and second rotation
transmitting parts 52 and 54 or more rotation transmitting
parts.
For example, if the driving part fixing member 30
includes only the first and second fixing rings 32 and 34,
the rotation transmitting part 50 may include only one of
the first and second rotation transmitting parts 52 and 54.
In this case, if the vibration absorbing part 60 is
considered, the rotation transmitting part 50 may only
include the first rotation transmitting part 52 having a
predetermined length.
Penetration openings 38 are formed in inner center
portions of the first to third fixing rings 32, 34 and 36
so that the driving part 12 such as the driving shaft 136a
21
may be inserted into the penetration openings 38.
In the embodiment of the present disclosure, if the
driving part 12 to which the first fixing ring 32 is fixed
using the set bolts 16 as shown in FIGS. 5 and 6 is rotated,
the first fixing ring 32 is rotated together with the
driving part 12. At this time, the rotation of the first
fixing ring 32 is transmitted to the second fixing ring 34
because the second fixing ring 34 is connected to the first
fixing ring 32 through the pins 52b.
In addition, the rotation of the second fixing ring
34 is also transmitted to the third fixing ring 36 because
the protrusions 54a formed at regular intervals on the
bottom side of the second fixing ring 34 are inserted into
the recesses 54b formed on the topside of the third fixing
ring 36 as shown in FIGS. 5 and 6.
Therefore, as shown in FIGS. 4 and 6, if the driving
part 12 such as the driving shaft 136a of the screw feeder
136 is rotated, the rotation of the driving part 12 is
sequentially transmitted to the first and second fixing
rings 32 and 34 or the first to third fixing rings 34 and
36 of the driving part fixing member 30, and thus the
driving part 12 and the driving part fixing member 30 may
be rotated together.
In addition, a guide groove 38a may be formed in the
22
bottom side of the first fixing ring 32, and a guide ring
38b may be formed on the topside of the second fixing ring
34. Alternatively, stepped portions may be formed on edge
portions of the first and second fixing rings 32 and 34 (a
stepped portion 33 of the second fixing ring 34 is shown in
FIG. 5). In addition, a packing 80' may be disposed
between peripheral portions of the first and second fixing
rings 32 and 34 to block contaminants such as dust.
Sealing members 80 such as O-rings may be disposed in
the penetration opening 38 of the third fixing ring 36, and
O-ring grooves 82 may be formed in the third fixing ring 36
as shown in FIG. 5.
Owing to the packing 80' disposed between the first
and second fixing rings 32 and 34, the sealing members 80
disposed between the third fixing ring 36 and the driving
part 12, and surface contact between the second and third
fixing rings 34 and 36, sealing may be stably maintained to
hermetically keep the structure 10 without the leakage of
high-pressure gas or dust from the inside of the structure
10.
In addition, sealing members 80 such as O-rings may
be disposed between the structure mounting ring 20 and the
base (or bracket) 10a welded to the structure 10.
As shown in FIGS. 4 to 6, in the driving part sealing
23
device 1 of the embodiment of the present disclosure, the
vibration absorbing part 60 may be disposed between at
least the first and second fixing rings 32 and 34 of the
first to third fixing rings 34 and 36 so as to absorb
vibrations or shaking while the driving part 12 is rotated.
For example, the vibration absorbing part 60 may
include a plurality of coil springs arranged along the
circumference of the second fixing ring 34.
In addition, the vibration absorbing part 60 may
include support plates 60a fixed to the topsides of the
coil springs, and the elasticity of the coil springs may be
adjusted by using pressing bolts 64 inserted into coupling
holes 32c formed at regular intervals along the
circumference of the first fixing ring 32.
That is, the elasticity of the coil springs may be
adjusted by tightening or loosening the pressing bolts 64,
so as to control vibration (shaking) absorbing ability of
the first and second fixing rings 32 and 34.
For example, when the driving part 12 such as the
driving shaft 136a of the screw feeder 136 installed in the
bin 138 is rotated as shown in FIG. 3, fine iron ore may be
discharged from the bin 138 by the rotation of the screw
feeder 136, and while the fine iron ore is discharged, the
driving shaft 136a may be vibrated (shaken). At this time,
24
the coil springs of the vibration absorbing part 60
disposed between the first and second fixing rings 32 and
34 may absorb the vibrations. Therefore, problems of the
related art such as vibration or sealing errors caused by
vibration may be prevented. That is, the driving part
sealing device 1 of the embodiment of the present
disclosure may effectively prevent sealing errors caused by
vibration of a driving shaft or may effectively protect a
driving shaft or a structure.
As shown in FIGS. 4 and 5, the driving part sealing
device 1 of the embodiment of the present disclosure may
further include the clamping part 70. The clamping part 70
may be used to maintain the assembled state of the
structure mounting ring 20 and the first to third fixing
rings 34 and 36 of the driving part fixing member 30 when
the driving part sealing device 1 is installed on the
structure 10. In addition, since the clamping part 70
fixes the first fixing ring 32 to the driving part 12, the
driving part sealing device 1 may be easily installed on
the structure 10.
For example, the clamping part 70 may be coupled
between the driving part fixing member 30 and the structure
mounting ring 20 to be mounted on the structure 10 to
maintain the assembled state of the driving part sealing
25
device 1 until the first fixing ring 32 is fixed to the
driving part 12.
The clamping part 70 may include: horizontally
extending clamping members (bars) 72 coupled to some of the
pressing bolts 64 fixed to the first fixing ring 32; and
clamping bolts 74 inserted into ends of the clamping
members 72 and vertically coupled to the structure mounting
ring 20 (or the structure 10).
The clamping bolts 74 inserted into the clamping
members 72 may be screwed in the structure mounting ring 20,
and the clamping members 72 may be fixed to the first
fixing ring 32 by the pressing bolts 64. Therefore, the
first to third fixing rings 34 and 36 may be clamped to the
structure mounting ring 20 in a tightly contact (assembled)
state.
After the driving part sealing device 1 is installed
on the structure 10 (in this state, the driving part 12
protrudes from the structure 10 through the driving part
sealing device 1, and the first fixing ring 32 is fixed to
the driving part 12 using the set bolts 16), the clamping
part 70 may be easily detached from the driving part
sealing device 1 by separating the clamping members 72
after slightly loosening the pressing bolts 64 and
unscrewing the clamping bolts 74.
26
Next, as shown in FIGS. 5 and 6, the rotation
absorbing part 40 of the driving part sealing device 1 may
include one or more convex rings 42 and one or more concave
rings 44 that are alternately arranged at corresponding
positions on the bottom side of the third fixing ring 36 of
the driving part fixing member 30 and the topside of the
structure mounting ring 20, so that the rotation of the
third fixing ring 36 may not be transmitted to the
structure mounting ring 20.
The convex rings 42 and the concave rings 44 may be
rings and grooves in which the rings are insertable, and
rotation may not be transmitted therebetween.
In the embodiment of the present disclosure, the
terms "convex rings" and "concave rings" are used to denote
alternately insertable structures. Referring to an actual
structure shown in FIG. 6, rings are arranged at
predetermined intervals on the bottom side of the third
fixing ring 36 in one piece with the third fixing ring 36,
and rings are arranged at predetermined intervals on a
central projection 26 of the structure mounting ring 20 in
one piece with the central projection 26.
Since the convex rings 42 formed on the bottom side
of the third fixing ring 36 are separate from the concave
rings 44 formed on the topside of the structure mounting
27
member (ring) 20, rotation may not be transmitted
therebetween. In addition, since the convex rings 42 and
the concave rings 44 are sequentially arranged in radial
directions with regard to the third fixing ring 36 and the
structure mounting ring 20, sealing between the convex
rings 42 and the concave rings 44 may be reliable.
As shown in FIGS. 5 and 6, the rotation absorbing
part 40 may include at least one of a lubricant supply
inlet 90 and a gas supply inlet 92 in the central
projection 26 of the structure mounting ring 20 (the
lubricant supply inlet 90 may be favored), so as to reduce
friction between the convex rings 42 and the concave rings
44 and improve sealing.
Referring to FIG. 6, a lubricant such as grease may
be supplied through the lubricant supply inlet 90 to an
innermost region between the convex rings 42 and the
concave rings 44, and then the lubricant be smoothly
distributed to the outermost convex ring 42 and concave
ring 44 by pressure.
In this way, the lubricant such as grease may be
uniformly distributed between the convex rings 42 and the
concave rings 44 of the rotation absorbing part 40, and
thus the interface between the convex rings 42 and the
concave rings 44 may be sealed. In addition, the convex
28
rings 42 and the concave rings 44 may be worn or damaged
less when the driving part 12 rotates.
In this way, the lubricant such as grease may block a
gap between the convex rings 42 and the concave rings 44 of
the rotation absorbing part 40 for sealing therebetween.
Along with this, inert gas such as nitrogen gas may
be supplied through the gas supply inlet 92 to form a gas
curtain layer for effectively preventing the leakage of gas
or dust.
In addition, as shown in FIG. 6, when the structure
mounting ring 20 of the embodiment of the present
disclosure is mounted on the structure 10 (such as the bin
138) or the base 10a attached to an outer wall of the bin
138, the sealing members 80 may be disposed between the
lowermost fixing ring of the driving part fixing member 30
(that is, the second or third fixing ring 34 or 36) and the
structure 10 or the base 10a. In this way, a gap between
metal plates may be sealed.
【Industrial Applicability】
An aspect of the present disclosure provides a
driving part sealing device capable of absorbing vibration
(shaking) and effectively sealing a structure such as a bin
or hopper through which a driving shaft (of a screw feeder)
is inserted. In addition, alternating ring structures
29
additionally included in the driving part sealing device
may prevent transmission of rotation and may provide
improved sealing while reducing abrasion.
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We Claim:
【Claim 1】
A sealing device for a driving part, the sealing
device comprising:
a structure mounting member mounted on a structure
and receiving the driving part therein;
a driving part fixing member disposed on the
structure mounting member and fixed to the driving part for
sealing the driving part inserted thereinto; and
a rotation absorbing part provided between the
driving part fixing member and the structure mounting
member for absorbing rotation using a relational structure.
【Claim 2】
The sealing device of claim 1, wherein the structure
mounting member is a structure mounting ring coupled to the
structure.
【Claim 3】
The sealing device of claim 1, wherein the driving
part fixing member comprises a plurality of driving part
fixing rings assembled to transmit rotational force through
a rotation transmitting part.
【Claim 4】
The sealing device of claim 3, wherein the rotation
transmitting part comprises at least one of:
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a first rotation transmitting part comprising a pin
inserted into at least one pin hole formed in the driving
part fixing rings; and
a second rotation transmitting part comprising a
protrusion inserted into at least one recess formed in the
driving part fixing rings.
【Claim 5】
The sealing device of claim 4, wherein the first and
second rotation transmitting parts are sequentially
arranged on the driving part fixing rings.
【Claim 6】
The sealing device of claim 3, further comprising a
guide groove and a guide ring provided on the driving part
fixing rings, or stepped portions formed on edge portions
of the driving part fixing rings making contact with each
other.
【Claim 7】
The sealing device of any one of claims 1 to 6,
wherein the rotation absorbing part comprises rings
arranged alternately on the driving part fixing member and
the structure mounting member so as to absorb rotation of
the driving part.
【Claim 8】
The sealing device of claim 7, wherein the rings of
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the rotation absorbing part comprise at least one convex
ring and at least one concave ring arranged at
corresponding positions, and
the convex ring and the concave ring are
correspondingly arranged on one of the driving part fixing
rings of the driving part fixing member and a structure
mounting ring, the structure mounting ring being the
structure mounting member and adjacent to the driving part
fixing ring.
【Claim 9】
The sealing device of claim 3, further comprising a
vibration absorbing part disposed between the driving part
fixing rings to absorb vibrations or shaking when the
driving part is rotated.
【Claim 10】
The sealing device of claim 9, wherein the vibration
absorbing part is a coil spring disposed in a hole formed
in the driving part fixing rings, and the coil spring is
adjusted in elasticity by using a pressing bolt inserted
into the driving part fixing rings.
【Claim 11】
The sealing device of any one of claims 1 to 6,
further comprising a clamping part connected between the
driving part fixing member and the structure mounting
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member or the structure for being used when the sealing
device is installed on the structure.
【Claim 12】
The sealing device of claim 11, wherein the clamping
part comprises:
a clamping bar horizontally fixed to an upper side of
the driving part fixing member; and
a clamping bolt inserted into the clamping bar and
coupled to the clamping bar and the structure mounting
member or the structure.
【Claim 13】
The sealing device of any one of claims 1 to 6,
wherein a fastener fixed to the driving part is coupled to
at least one of the driving part fixing rings of the
driving part fixing member, and
at least one sealing member is provided on at least
one of the structure mounting member and the driving part
fixing member for sealing between the driving part and the
sealing device.
【Claim 14】
The sealing device of any one of claims 1 to 6,
further comprising at least one of a lubricant supply unit
and a gas supply unit connected to the rotation absorbing
part for suppressing abrasion or maintaining sealing.
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【Claim 15】
The sealing device of any one of claims 1 to 6,
wherein the structure is a bin or hopper comprising a screw
feeder, and
the driving part is a driving shaft of the screw
feeder.