CN111365519A - Hot-blast door shaft sealing device of boiler coal pulverizer - Google Patents
Hot-blast door shaft sealing device of boiler coal pulverizer Download PDFInfo
- Publication number
- CN111365519A CN111365519A CN202010276102.1A CN202010276102A CN111365519A CN 111365519 A CN111365519 A CN 111365519A CN 202010276102 A CN202010276102 A CN 202010276102A CN 111365519 A CN111365519 A CN 111365519A
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- sleeve
- door shaft
- tensioning
- sealing
- sleeved
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/023—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles
- F16K41/026—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles for rotating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
- F16J15/4476—Labyrinth packings with radial path
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
Abstract
The invention discloses a sealing device for a hot air door shaft of a boiler coal mill, which comprises: the door shaft sleeve fixing seat is sleeved on the door shaft; the wear-resistant sleeve is sleeved on the door shaft, and the bottom of the wear-resistant sleeve is embedded in the upper barrel opening of the door shaft sleeve fixing seat; the inner sealing sleeve is sleeved at the top of the wear-resistant sleeve and is fixedly connected with the door shaft sleeve fixing seat, and a plurality of sealing rings are embedded on the outer peripheral wall of the inner sealing sleeve at intervals; the top of the outer sealing sleeve is sleeved on the door spindle, and the bottom of the outer sealing sleeve is sleeved outside the sealing ring; the tensioning assembly is sleeved on the door shaft, and the bottom end of the tensioning assembly is embedded in the upper barrel opening of the outer sealing sleeve and is fixedly connected with the outer sealing sleeve; a labyrinth seal structure is formed among the inner seal sleeve, the seal ring and the outer seal sleeve, and the seal effect is good.
Description
Technical Field
The invention relates to the technical field of sealing devices, in particular to a sealing device for a hot air door shaft of a coal mill of a boiler.
Background
At present, adopt graphite packing gland packing to seal mostly between the wind channel door of coal pulverizer and the door-hinge, but use a period back when the wind channel door, because open and shut frequently, the inside high temperature medium that is in the wind channel in addition, because high temperature causes the inside moisture evaporation of graphite packing gland packing to lose elasticity, make the graphite packing gland packing at door-hinge position easily appear ageing and the phenomenon of deformation, graphite packing gland packing's life has been shortened, and then can produce the clearance between door-hinge and the graphite packing gland packing, under the effect of wind channel pressure, the medium in the wind channel spills over from the door-hinge clearance, thereby the condition of leaking out and leaking the ash appears.
Therefore, how to provide a hot blast door shaft sealing device of a boiler coal mill with long service life and good sealing effect is a problem that needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides the sealing device for the hot blast door shaft of the coal mill of the boiler, which has the advantages of long service life and good sealing effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a kind of boiler coal pulverizer hot-blast door spindle sealing means, comprising:
the door shaft sleeve fixing seat is sleeved on the door shaft;
the wear-resistant sleeve is sleeved on the door shaft, and the bottom of the wear-resistant sleeve is embedded in an upper barrel opening of the door shaft sleeve fixing seat;
the inner sealing sleeve is sleeved at the top of the wear-resistant sleeve and is fixedly connected with the door spindle sleeve fixing seat, and a plurality of sealing rings are embedded on the outer peripheral wall of the inner sealing sleeve at intervals;
the top of the outer sealing sleeve is sleeved on the door spindle, and the bottom of the outer sealing sleeve is sleeved outside the sealing ring;
the tensioning assembly is sleeved on the door shaft, the bottom end of the tensioning assembly is embedded in the upper barrel opening of the outer sealing sleeve, and the tensioning assembly is fixedly connected with the outer sealing sleeve;
and a labyrinth seal structure is formed among the inner seal sleeve, the seal ring and the outer seal sleeve.
According to the technical scheme, compared with the prior art, the invention discloses and provides the sealing device for the hot air door shaft of the boiler coal mill, the outer sealing sleeve is connected to the door shaft in a tensioning mode through the tensioning assembly in a tensioning mode and rotates along with the door shaft, the sealing rings are arranged on the outer side of the inner sealing sleeve, when the door shaft rotates, the outer sealing sleeve rotates relative to the inner sealing sleeve, and a labyrinth sealing structure is formed among the inner sealing sleeve, the sealing rings and the outer sealing sleeve, so that the sealing effect is good.
Furthermore, a lap joint edge is arranged in the upper barrel opening of the door shaft sleeve fixing seat, and the bottom end of the wear-resistant sleeve is inserted in the upper barrel opening of the door shaft sleeve fixing seat and is abutted to the lap joint edge.
The beneficial effect who adopts above-mentioned technical scheme to produce is, the installation of easy wear-resisting sleeve to set up wear-resisting sleeve, can avoid door-hinge sleeve fixing base and inner seal sleeve direct and door-hinge contact and wearing and tearing, only need change wear-resisting sleeve in the later maintenance can, need not to change door-hinge sleeve fixing base and inner seal sleeve, reduce the maintenance cost.
Furthermore, a mounting groove is formed in the bottom end of the inner sealing sleeve, and the top of the door spindle sleeve fixing seat is inserted into the mounting groove and fixedly connected with the inner sealing sleeve through a first connecting bolt.
Adopt above-mentioned technical scheme to produce beneficial effect be, easily on the interior seal sleeve installs door-hinge sleeve fixing base.
Further, the outer sealing sleeve comprises: first barrel and second barrel, first barrel cover is established on the door-hinge, just tight subassembly bottom inlays to be established last nozzle department of first barrel, tight subassembly with first barrel fixed connection rises, the last nozzle inboard of second barrel with first barrel is outer along a body coupling, the second barrel cover is established the sealing ring outside, the internal seal sleeve the sealing ring with form between the second barrel labyrinth seal structure.
Further, the tight subassembly that rises includes:
the tensioning sleeve is sleeved on the door shaft, the bottom of the tensioning sleeve is embedded in the upper cylinder opening of the first cylinder, and the tensioning sleeve is fixedly connected with the top end of the first cylinder;
the wedge-shaped piston ring is sleeved on the door shaft and embedded in the tensioning sleeve;
and the pressing sleeve is positioned above the tensioning sleeve, sleeved on the door shaft and fixedly connected with the tensioning sleeve, and the bottom end of the pressing sleeve is in compression joint with the top end of the tensioning sleeve and the top end of the wedge-shaped tensioning ring.
The technical scheme has the beneficial effects that the wedge-shaped piston ring is compressed by the compression sleeve to expand, the expansion sleeve is compressed by the wedge-shaped piston ring, the expansion sleeve is compressed by the expansion sleeve, the expansion sleeve compresses the upper barrel body, and the outer sealing sleeve is fixedly connected to the door shaft in an expansion way and rotates together with the door shaft.
Furthermore, the tensioning sleeve is fixedly connected with the top end of the first cylinder body through a second connecting bolt, and the pressing sleeve is fixedly connected with the top end of the tensioning sleeve through a third connecting bolt.
Furthermore, a tensioning boss is integrally formed in the middle of the bottom end of the tensioning sleeve, the tensioning boss is embedded in the upper barrel opening of the first barrel, and the outer edge of the tensioning boss is abutted to the inner edge of the upper barrel opening of the first barrel.
Adopt the beneficial effect that above-mentioned technical scheme produced to be through rising tight boss with the external seal sleeve expansion joint fix on the door-hinge.
Furthermore, the inner wall of the tensioning sleeve is matched with the outer wall of the wedge-shaped piston ring in shape.
Furthermore, the door hinge sleeve further comprises a pressing sleeve, wherein the pressing sleeve is sleeved on the door hinge sleeve fixing seat and fixedly connected with the bottom end of the second cylinder body through a fourth connecting bolt.
Further, the door frame further comprises an upper cover plate, the upper cover plate is sleeved on the door shaft and located above the pressing sleeve, and the upper cover plate is fixedly connected with the pressing sleeve through a fifth connecting bolt.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hot blast door shaft sealing device of a coal mill of a boiler provided by the invention.
Fig. 2 is an enlarged schematic view of a part a in fig. 1.
Fig. 3 is a structural schematic diagram of the inner sealing sleeve.
Wherein: 1-a door shaft sleeve fixing seat, 101-a lap joint edge, 2-a wear-resistant sleeve, 3-an inner sealing sleeve, 301-a mounting groove, 4-a sealing ring, 5-an outer sealing sleeve, 51-a first cylinder, 52-a second cylinder, 6-a tensioning assembly, 61-a tensioning sleeve, 611-a tensioning boss, 62-a wedge-shaped tensioning ring, 63-a pressing sleeve, 7-a labyrinth structure, 8-a first connecting bolt, 9-a second connecting bolt, 10-a third connecting bolt, 11-a lower pressing sleeve, 12-a fourth connecting bolt, 13-an upper cover plate and 14-a fifth connecting bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a sealing device for a hot air door shaft of a boiler coal mill, which comprises:
the door shaft sleeve fixing seat 1 is sleeved on the door shaft;
the wear-resistant sleeve 2 is sleeved on the door shaft, and the bottom of the wear-resistant sleeve 2 is embedded in the upper barrel opening of the door shaft sleeve fixing seat 1;
the inner sealing sleeve 3 is sleeved at the top of the wear-resistant sleeve 2 and is fixedly connected with the door shaft sleeve fixing seat 1, a plurality of sealing rings 4 are embedded on the outer peripheral wall of the inner sealing sleeve 3 at intervals, and the sealing rings can adopt split rings;
the top of the outer sealing sleeve 5 is sleeved on the door spindle, and the bottom of the outer sealing sleeve 5 is sleeved on the outer side of the sealing ring 4;
the tensioning assembly 6 is sleeved on the door shaft, the bottom end of the tensioning assembly 6 is embedded in the upper barrel opening of the outer sealing sleeve 5, and the tensioning assembly 6 is fixedly connected with the outer sealing sleeve 5;
wherein a labyrinth seal structure 7 is formed among the inner seal sleeve 3, the seal ring 4 and the outer seal sleeve 5.
Be provided with overlap joint along 101 in the last nozzle of door axle sleeve fixing base 1, in the last nozzle of door axle sleeve fixing base 1 was pegged graft to 2 bottoms of wear-resisting sleeve, and along 101 butts with the overlap joint.
Mounting groove 31 has been seted up to 3 bottoms of inner seal sleeve, and 1 tops of door-hinge sleeve fixing base are pegged graft in mounting groove 301, and through first connecting bolt 8 and 3 fixed connection of inner seal sleeve.
The outer sealing sleeve 5 comprises: the first barrel 52 is sleeved on the door shaft, the bottom of the tensioning assembly 6 is embedded at the upper barrel opening of the first barrel 51, the tensioning assembly 6 is fixedly connected with the first barrel 51, the inner side of the upper barrel opening of the second barrel 52 is integrally connected with the outer edge of the first barrel 51, the second barrel 52 is sleeved on the outer side of the sealing ring 4, and a labyrinth sealing structure 7 is formed among the inner sealing sleeve 3, the sealing ring 4 and the second barrel 52.
The tensioning assembly 6 comprises:
the tensioning sleeve 61 is sleeved on the door shaft, the bottom of the tensioning sleeve 61 is embedded in the upper opening of the first cylinder 51, and the tensioning sleeve 61 is fixedly connected with the top end of the first cylinder 51;
the wedge-shaped piston ring 62 is sleeved on the door shaft, and the wedge-shaped piston ring 62 is embedded in the tensioning sleeve 61;
and the pressing sleeve 63 is positioned above the tensioning sleeve 61, sleeved on the door shaft and fixedly connected with the tensioning sleeve 61, and the bottom end of the pressing sleeve 63 is in pressure connection with the top end of the tensioning sleeve 61 and the top end of the wedge-shaped tensioning ring 62.
The tensioning sleeve 61 is fixedly connected with the top end of the first barrel 51 through a second connecting bolt 9, and the pressing sleeve 63 is fixedly connected with the top end of the tensioning sleeve 61 through a third connecting bolt 10.
The middle part of the bottom end of the tensioning sleeve 61 is integrally formed with a tensioning boss 611, the tensioning boss 611 is embedded in the upper opening of the first cylinder 51, and the outer edge of the tensioning boss 611 abuts against the inner edge of the upper opening of the first cylinder 51.
The inner wall of the tensioning sleeve 61 is matched with the outer wall of the wedge-shaped tensioning ring 62 in shape.
The hot air door shaft sealing device of the boiler coal mill further comprises a lower pressing sleeve 11, wherein the lower pressing sleeve 11 is sleeved on the door shaft sleeve fixing seat 1 and is fixedly connected with the bottom end of the second barrel 52 through a fourth connecting bolt 12.
The sealing device for the hot air door shaft of the coal mill of the boiler further comprises an upper cover plate 13, the upper cover plate 13 is sleeved on the door shaft and is located above the pressing sleeve 63, and the upper cover plate 13 and the pressing sleeve 63 are fixedly connected through a fifth connecting bolt 14.
The sealing principle is as follows: the door shaft sleeve fixing seat in the hot blast door shaft sealing device of the boiler coal mill is welded on the door shaft flange seat and is fixedly connected with the inner sealing sleeve, the outer sealing sleeve is fixed on the door shaft through a tensioning assembly in a tensioning manner and rotates along with the door shaft, when the door shaft rotates, the outer sealing sleeve rotates compared with the inner sealing sleeve, and then a closure gap and an expansion cavity can be formed between the sealing ring and the inner sealing sleeve, namely, a labyrinth sealing structure, and when a sealed medium passes through the gap of a labyrinth, a throttling effect is generated to achieve the purpose of leakage resistance.
Meanwhile, all parts in the device can be made of metal materials such as stainless steel, and the device is high-temperature resistant, high in strength and long in service cycle.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a hot-blast door shaft sealing device of boiler coal pulverizer which characterized in that includes:
the door shaft sleeve fixing seat (1), the door shaft sleeve fixing seat (1) is sleeved on the door shaft;
the wear-resistant sleeve (2) is sleeved on the door shaft, and the bottom of the wear-resistant sleeve (2) is embedded in the upper barrel opening of the door shaft sleeve fixing seat (1);
the inner sealing sleeve (3) is sleeved on the top of the wear-resistant sleeve (2) and is fixedly connected with the door spindle sleeve fixing seat (1), and a plurality of sealing rings (4) are embedded on the outer peripheral wall of the inner sealing sleeve (3) at intervals;
the top of the outer sealing sleeve (5) is sleeved on the door spindle, and the bottom of the outer sealing sleeve (5) is sleeved on the outer side of the sealing ring (4);
the tensioning assembly (6) is sleeved on the door shaft, the bottom end of the tensioning assembly (6) is embedded in the upper barrel opening of the outer sealing sleeve (5), and the tensioning assembly (6) is fixedly connected with the outer sealing sleeve (5);
wherein a labyrinth seal structure (7) is formed among the inner seal sleeve (3), the seal ring (4) and the outer seal sleeve (5).
2. The sealing device for the hot blast door shaft of the boiler coal mill according to claim 1, wherein a lapping edge (101) is arranged in the upper opening of the door shaft sleeve fixing seat (1), and the bottom end of the wear-resistant sleeve (2) is inserted into the upper opening of the door shaft sleeve fixing seat (1) and is abutted against the lapping edge (101).
3. The sealing device for the hot blast door shaft of the boiler coal mill according to claim 1, wherein the bottom end of the inner sealing sleeve (3) is provided with a mounting groove (31), the top of the door shaft sleeve fixing seat (1) is inserted into the mounting groove (301), and is fixedly connected with the inner sealing sleeve (3) through a first connecting bolt (8).
4. The sealing device for the hot blast door shaft of the boiler coal mill according to claim 1, wherein the outer sealing sleeve (5) comprises: first barrel (51) and second barrel (52), first barrel (52) cover is established on the door-hinge, just tight subassembly (6) bottom inlays and establishes last barrel head department of first barrel (51), tight subassembly (6) with first barrel (51) fixed connection rises, the last barrel head of second barrel (52) inside with first barrel (51) outer fringe body coupling, second barrel (52) cover is established the sealing ring (4) outside, interior sealing sleeve (3) sealing ring (4) with form between second barrel (52) labyrinth seal structure (7).
5. The sealing device for the hot blast door shaft of the boiler coal mill according to claim 4, wherein the tensioning assembly (6) comprises:
the tensioning sleeve (61) is sleeved on the door shaft, the bottom of the tensioning sleeve (61) is embedded in an upper barrel opening of the first barrel body (51), and the tensioning sleeve (61) is fixedly connected with the top end of the first barrel body (51);
the wedge-shaped piston ring (62) is sleeved on the door shaft, and is embedded in the tensioning sleeve (61);
the compressing sleeve (63) is located above the tensioning sleeve (61), sleeved on the door shaft and fixedly connected with the tensioning sleeve (61), and the bottom end of the compressing sleeve (63) is in pressure connection with the top end of the tensioning sleeve (61) and the top end of the wedge-shaped tensioning ring (62).
6. The sealing device for the hot blast door shaft of the boiler coal mill according to claim 5, characterized in that the tensioning sleeve (61) is fixedly connected with the top end of the first cylinder (51) through a second connecting bolt (9), and the pressing sleeve (63) is fixedly connected with the top end of the tensioning sleeve (61) through a third connecting bolt (10).
7. The sealing device for the hot blast door shaft of the boiler coal mill according to claim 5, wherein a tensioning boss (611) is integrally formed in the middle of the bottom end of the tensioning sleeve (61), the tensioning boss (611) is embedded in the upper opening of the first cylinder (51), and the outer edge of the tensioning boss (611) abuts against the inner edge of the upper opening of the first cylinder (51).
8. The sealing device for the hot blast door shaft of the boiler coal mill according to claim 5, characterized in that the inner wall of the cylinder of the tensioning sleeve (61) is matched with the outer wall of the wedge-shaped piston ring (62) in shape.
9. The sealing device for the hot blast door spindle of the coal mill of the boiler according to any one of claims 4 to 8, characterized by further comprising a lower pressing sleeve (11), wherein the lower pressing sleeve (11) is sleeved on the door spindle sleeve fixing seat (1) and is fixedly connected with the bottom end of the second cylinder (52) through a fourth connecting bolt (12).
10. The sealing device for the hot blast door shaft of the coal mill of the boiler according to any one of the claims 5 to 8, characterized by further comprising an upper cover plate (13), wherein the upper cover plate (13) is sleeved on the door shaft and is located above the pressing sleeve (63), and the upper cover plate (13) is fixedly connected with the pressing sleeve (63) through a fifth connecting bolt (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010276102.1A CN111365519A (en) | 2020-04-09 | 2020-04-09 | Hot-blast door shaft sealing device of boiler coal pulverizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010276102.1A CN111365519A (en) | 2020-04-09 | 2020-04-09 | Hot-blast door shaft sealing device of boiler coal pulverizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111365519A true CN111365519A (en) | 2020-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010276102.1A Pending CN111365519A (en) | 2020-04-09 | 2020-04-09 | Hot-blast door shaft sealing device of boiler coal pulverizer |
Country Status (1)
| Country | Link |
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| CN (1) | CN111365519A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115264070A (en) * | 2022-09-28 | 2022-11-01 | 常州市迅驰干燥设备有限公司 | Large axial float double-end-face mechanical sealing device |
-
2020
- 2020-04-09 CN CN202010276102.1A patent/CN111365519A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115264070A (en) * | 2022-09-28 | 2022-11-01 | 常州市迅驰干燥设备有限公司 | Large axial float double-end-face mechanical sealing device |
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