CN114263744B - Sealing structure suitable for under slag water complex environment - Google Patents
Sealing structure suitable for under slag water complex environment Download PDFInfo
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- CN114263744B CN114263744B CN202111558220.2A CN202111558220A CN114263744B CN 114263744 B CN114263744 B CN 114263744B CN 202111558220 A CN202111558220 A CN 202111558220A CN 114263744 B CN114263744 B CN 114263744B
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- 238000007789 sealing Methods 0.000 title claims abstract description 137
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 239000002893 slag Substances 0.000 title abstract description 35
- 239000010687 lubricating oil Substances 0.000 claims abstract description 15
- 239000013049 sediment Substances 0.000 claims abstract 2
- 239000003921 oil Substances 0.000 claims description 8
- 229920000459 Nitrile rubber Polymers 0.000 claims description 5
- 239000002245 particle Substances 0.000 abstract description 10
- 238000002955 isolation Methods 0.000 abstract description 4
- 230000006837 decompression Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Landscapes
- Sealing Of Bearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides a seal structure suitable for under sediment water complex environment, includes casing, axle and interior guide pulley, and the solid cover of interior guide pulley is at the left end tip of axle, and the right end tip of axle penetrates in the casing, has set gradually water seal chamber, airtight chamber and lubricating oil chamber from a left side to the right side between axle and the casing, is provided with the bearing in the lubricating oil chamber, and the axle passes through bearing and casing normal running fit, and the water pressure in the water seal chamber is 0.45MPa, and the atmospheric pressure is higher than water seal intracavity water pressure 0.02MPa ~0.05MPa in the airtight chamber. The bearing between the shaft and the shell is protected through the mode of the water seal structure and the air seal structure, even if the sealing framework of the water seal structure is damaged, the air seal structure is further arranged between the bearing and the water seal structure, the pressure of the air seal structure is higher than that of the water seal structure, secondary isolation is achieved, and maintenance is timely carried out when a large decompression state occurs through the water seal structure, so that slag water entering the bearing is avoided, and the bearing is effectively prevented from being damaged by particles in the slag water.
Description
Technical Field
The invention relates to a slag dragging machine, in particular to a sealing structure suitable for a complex slag-water environment.
Background
In chemical production or petrochemical industry, the slag scooping machine is used as key equipment in a slag discharging system, and the operation of the slag scooping machine is related to the normal operation of the slag discharging system.
The original design of the inner guide wheel of the slag dragging machine is that a water seal is added between a bearing and a chain wheel, both sides of the sealing water are sealed with a sealing framework of a shaft, the inner guide wheel is soaked in slag water for a long time due to poor working environment of the inner guide wheel, the shaft is rusted and sealed ageing causes water seal leakage, oil is deteriorated after the water leaks into a bearing cavity, finally the bearing is damaged and the inner guide wheel is blocked, and the abrasion of a chain to the inner guide wheel is aggravated after the blocking. During the operation of the system, the inner guide wheel needs to be stopped for emptying the inner slag water during the replacement and maintenance of the inner guide wheel, and the stable operation of the whole set of device is seriously affected.
Therefore, the improvement of the sealing mode of the guide wheel in the slag dragging machine is required, and the long-period stable operation of the slag dragging machine in severe environments such as slag-water mixing is ensured.
Disclosure of Invention
Aiming at the requirements in the prior art, the invention provides a sealing structure suitable for a slag-water complex environment.
The utility model provides a seal structure suitable for under slag water complex environment, includes casing, axle and interior guide pulley, interior guide pulley's solid cover is in the left end tip of axle, the right end tip of axle penetrates in the casing water seal chamber, airtight chamber and lubricating oil chamber have set gradually from a left side to the right side between axle and the casing be provided with the bearing in the lubricating oil chamber, the axle passes through the bearing with casing normal running fit, the water pressure in the water seal chamber is 0.35MPa ~ 0.55MPa, the atmospheric pressure is higher than the pressure range of water pressure in the water seal chamber is 0.02MPa ~0.05MPa.
Further: an interference fit sealing framework is arranged between the shell and the shaft, and a water sealing cavity or an air sealing cavity is formed among the two sealing frameworks, the shell and the shaft.
Further: the sealing framework is made of nitrile rubber, and the nitrile rubber has the characteristics of high temperature resistance, wear resistance and corrosion resistance.
Further: the middle part of the shaft is sleeved with a sealing sleeve, the outer diameter of the left end part of the sealing sleeve is larger than the outer diameter of the right end part of the sealing sleeve, the right end part of the sealing sleeve is sleeved in the shell and in interference fit with the shell, the left end part of the sealing sleeve is bonded with the left end face of the shell and fixedly connected through a screw, a first sealing framework is in interference fit between the shaft and the shell, a water sealing cavity is formed among the two first sealing frameworks, the sealing sleeve and the shaft, and a water inlet channel communicated with the water sealing cavity is formed in the side wall of the sealing sleeve; the shaft and the shell are in interference fit with a second sealing framework, an airtight cavity is formed among the two second sealing frameworks, the shell and the shaft, an air inlet channel communicated with the airtight cavity is formed in the shell, and an oil inlet channel communicated with the lubricating oil cavity is formed in the shell.
In order to realize pressure maintaining and pressure stabilizing of the airtight cavity, water is filled into the airtight cavity after the air pressure in the airtight cavity is prevented from being smaller than the water pressure of the water sealing cavity, and the method is further characterized in that: the middle part of the shaft is sleeved with a sealing sleeve, the outer diameter of the left end part of the sealing sleeve, the outer diameter of the middle part of the sealing sleeve and the outer diameter of the right end part of the sealing sleeve are sequentially reduced in a step mode, the middle part and the right end part of the sealing sleeve are sleeved in the shell, the middle part of the sealing sleeve is in interference fit with the shell, the left end part of the sealing sleeve is in fit with the left end face of the shell and is fixedly connected with the left end face of the shell through a screw, a first sealing framework is in interference fit between the shaft and the shell, a water sealing cavity is formed among the two first sealing frameworks, the sealing sleeve and the shaft, and a water inlet channel communicated with the water sealing cavity is formed in the side wall of the sealing sleeve; the novel lubricating oil cavity sealing device comprises a shaft, a first sealing framework, a second sealing framework, a sealing sleeve, a shell and a shaft, wherein the shaft is in interference fit with the shell, the second sealing framework, the first sealing framework, the second sealing framework, the sealing sleeve, the shell and the shaft form a sealing cavity, an annular gap pressure maintaining belt is formed between the shell and the right end of the sealing sleeve, an air inlet channel communicated with the annular gap pressure maintaining belt is formed in a position, corresponding to the right end of the sealing sleeve, on the shell, and an oil inlet channel communicated with the lubricating oil cavity is formed in the shell.
Further: the thickness of the annular gap pressure maintaining belt in the radial direction of the sealing sleeve is 0.5 mm-2 mm, and the length of the annular gap pressure maintaining belt in the axial direction of the sealing sleeve is 20 mm-30 mm.
Further: the right side cover of axle is equipped with sealed lid, sealed lid with casing is fixed and sealing connection.
The invention has the beneficial effects that: the bearing between the shaft and the shell is protected through the mode of the water seal structure and the air seal structure, even if the sealing framework of the water seal structure is damaged, the air seal structure is further arranged between the bearing and the water seal structure, the pressure of the air seal structure is higher than that of the water seal structure, secondary isolation is achieved, and maintenance is timely carried out when a large decompression state occurs through the water seal structure, so that slag water entering the bearing is avoided, and the bearing is effectively prevented from being damaged by particles in the slag water.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of the present invention;
fig. 3 is a schematic structural view of a third embodiment of the present invention.
In the figure, 1, an inner guide wheel; 2. a shaft; 3. a housing; 31. an air intake passage; 32. an oil inlet passage; 4. a bearing; 5. sealing cover; 6. sealing the sleeve; 61. a water inlet channel; 71. a water seal chamber; 72. an airtight cavity; 73. a lubrication oil chamber; 8. sealing the framework; 81. a first sealing skeleton; 82. a second sealing skeleton; 9. an annular gap pressure maintaining belt.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. The terms left, middle, right, upper, lower, etc. in the examples of the present invention are merely relative concepts or references to the normal use state of the product, and should not be construed as limiting.
First embodiment:
the utility model provides a seal structure suitable for under slag water complex environment, shown in fig. 1, includes casing, axle and interior guide pulley 1, interior guide pulley 1's solid cover is in the left end tip of axle 2, the right-hand member tip of axle 2 penetrates in the casing 3 be provided with water seal chamber 71, airtight chamber 72 and lubricating oil chamber 73 in proper order from left to right between axle 2 and the casing 3 be provided with bearing 4 in the lubricating oil chamber 73, axle 2 pass through bearing 4 with casing 3 normal running fit, the water pressure in the water seal chamber 71 is 0.35MPa ~ 0.55MPa, the pressure range of the interior atmospheric pressure of airtight chamber 72 is higher than the interior water pressure of water seal chamber 71 is 0.02MPa ~0.05MPa. An interference fit seal skeleton 8 is arranged between the shell 73 and the shaft 2, and the water seal cavity 71 or the air seal cavity 72 is formed among the two seal skeletons 8, the shell 3 and the shaft 2. The sealing framework 8 is made of nitrile rubber, and the nitrile rubber has the characteristics of high temperature resistance, wear resistance and corrosion resistance.
The working principle of the invention is as follows: the invention is arranged at the lower part of the slag extractor and is sunk into slag water, then the inner ring of the chain plate in the slag extractor is meshed with the inner guide wheel, the driving motor in the slag extractor drives the chain plate to rotate, and the inner guide wheel and the shaft follow the chain plate to be driven, so that the scraping plate arranged on the outer ring of the chain plate can carry sundries in the slag water into the slag water.
Second embodiment:
other technical features are that under the same condition as the first embodiment, as shown in fig. 2, a sealing sleeve 6 is sleeved in the middle of the shaft 2, the outer diameter of the left end part of the sealing sleeve 6 is larger than that of the right end part of the sealing sleeve, the right end part of the sealing sleeve 6 is sleeved in the shell 3 and is in interference fit with the shell 3, the left end part of the sealing sleeve 6 is bonded with the left end face of the shell 3 and is fixedly connected through a screw, a first sealing skeleton 81 is in interference fit between the shaft 2 and the shell 3, a water sealing cavity 71 is formed among the two first sealing skeletons 81, the sealing sleeve 6 and the shaft 2, and a water inlet channel 61 communicated with the water sealing cavity 71 is formed on the side wall of the sealing sleeve 6; the shaft 2 and the shell 3 are in interference fit with a second sealing framework 82, the two second sealing frameworks 82, the shell 3 and the shaft 2 form an airtight cavity 72, an air inlet channel 31 communicated with the airtight cavity 72 is formed in the shell 3, and an oil inlet channel 32 communicated with the lubricating oil cavity 73 is formed in the shell 3. The right side of the shaft 2 is covered with a sealing cover 5, and the sealing cover 5 is fixedly and hermetically connected with the shell 3.
Sealing water adopted at present cannot enter and exit, and enters the water sealing cavity 71 through the water inlet channel 6, and the pressure is controlled to be 0.45MPa. The airtight cavity is not provided with a loop, and the air pressure in the airtight cavity is kept to be higher than the water pressure in the water sealing cavity 71 by 0.02-0.05 MPa all the time. When the water seal cavity leaks, the added air seal cavity can play a secondary isolation role, and the water seal cavity is maintained in time under the condition of large decompression of the water seal cavity, so that slag water particles are effectively prevented from entering the bearing and damaging the bearing.
Compared with the prior art:
if a single water seal structure is adopted, the inner guide wheel side seal works in slag water due to the working environment, fine slag particles abrade a seal framework and a shaft, the seal framework is damaged after long-time abrasion, the slag water particles can enter a water seal cavity after the seal framework is damaged and damage the seal close to the bearing side, and after the bearing side seal is damaged, part of slag water particles in the water seal cavity can enter a bearing box to damage a bearing.
If a single air seal structure is adopted, an original sealed water source is replaced by an air source, the bearing is generally operated for about 3 months, the bearing is generally blocked, the rear cover of the bearing is opened, slag water exists in the bearing box, the damage form of the sealing skeleton is the same as that of the original water seal structure through disassembly and inspection, the single air seal structure cannot thoroughly isolate the slag water, after long-time operation, the inner guide wheel side sealing skeleton is damaged, a large amount of slag particles can be accumulated between the sealing skeleton and a shaft, part of slag particles can be blown to the bearing side sealing skeleton at the other end by air in the air seal structure, and then damaged, and the bearing is blocked after entering the bearing.
The invention adopts a mode of combining the water seal structure and the air seal structure, so that the bearing can be better protected, even if the sealing framework of the water seal structure is damaged, as the air seal structure is added between the bearing and the water seal structure, the pressure in the air seal structure is higher than the pressure in the water seal structure, and secondary isolation is realized, so that slag water particles can not enter the bearing cavity to damage the bearing; the water seal cavity is maintained timely under the condition that the water seal cavity is greatly out of pressure, so that the mode of combining the water seal structure and the air seal structure can effectively avoid that slag water particles cannot enter the bearing.
Third embodiment:
other technical features in the same case as the second embodiment, in order to achieve pressure maintaining and pressure stabilizing of the airtight chamber, water is prevented from being poured into the airtight chamber after the air pressure in the airtight chamber is smaller than the water pressure in the water sealing chamber, as shown in fig. 3, a sealing sleeve 6 is sleeved in the middle of the shaft 2, the outer diameter of the left end part of the sealing sleeve 6, the outer diameter of the middle part of the sealing sleeve 6 and the outer diameter of the right end part of the sealing sleeve are sequentially reduced in a stepped manner, the middle part and the right end part of the sealing sleeve 6 are sleeved in the housing 3, the middle part of the sealing sleeve 6 is in interference fit with the housing 3, the left end part of the sealing sleeve 6 is in engagement with the left end surface of the housing 3 and is fixedly connected through a screw, a first sealing skeleton 81 is in interference fit between the shaft 2 and the housing 3, the sealing sleeve 71 is formed among the two first sealing skeletons 81, the sealing sleeve 6 and the shaft 2, and a water inlet channel 61 communicated with the water sealing cavity 71 is formed in the side wall of the sealing sleeve 6; the shaft 2 and the shell 3 are in interference fit with a second seal skeleton 82, one first seal skeleton 81, one second seal skeleton 82, a seal sleeve 6, the shell 3 and the shaft 2 form an airtight cavity 72, an annular gap pressure maintaining belt 9 is formed between the shell 3 and the right end part of the seal sleeve 6, an air inlet channel 31 communicated with the annular gap pressure maintaining belt 9 is formed on the shell 3 at a position corresponding to the right end part of the seal sleeve 6, and an oil inlet channel 32 communicated with the lubricating oil cavity 73 is formed on the shell 3. The thickness of the annular gap pressure maintaining belt 9 in the radial direction of the sealing sleeve 6 is 0.5 mm-2 mm, and the length of the annular gap pressure maintaining belt 9 in the axial direction of the sealing sleeve 6 is 20 mm-30 mm.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. Sealing structure suitable for under sediment water complex environment, its characterized in that: the device comprises a shell, a shaft and an inner guide wheel, wherein the inner guide wheel is fixedly sleeved at the left end part of the shaft, the right end part of the shaft penetrates into the shell, a water sealing cavity, an air sealing cavity and a lubricating oil cavity are sequentially arranged between the shaft and the shell from left to right, a bearing is arranged in the lubricating oil cavity, the shaft is in running fit with the shell through the bearing, the water pressure in the water sealing cavity is 0.35-0.55 MPa, and the pressure range of the air pressure in the air sealing cavity higher than the water pressure in the water sealing cavity is 0.02-0.05 MPa;
the middle part of the shaft is sleeved with a sealing sleeve, the outer diameter of the left end part of the sealing sleeve, the outer diameter of the middle part of the sealing sleeve and the outer diameter of the right end part of the sealing sleeve are sequentially reduced in a step mode, the middle part and the right end part of the sealing sleeve are sleeved in the shell, the middle part of the sealing sleeve is in interference fit with the shell, the left end part of the sealing sleeve is in fit with the left end face of the shell and is fixedly connected with the left end face of the shell through a screw, a first sealing framework is in interference fit between the shaft and the shell, a water sealing cavity is formed among the two first sealing frameworks, the sealing sleeve and the shaft, and a water inlet channel communicated with the water sealing cavity is formed in the side wall of the sealing sleeve; the novel lubricating oil cavity sealing device comprises a shaft, a first sealing framework, a second sealing framework, a sealing sleeve, a shell and a shaft, wherein the shaft is in interference fit with the shell, the second sealing framework, the first sealing framework, the second sealing framework, the sealing sleeve, the shell and the shaft form a sealing cavity, an annular gap pressure maintaining belt is formed between the shell and the right end of the sealing sleeve, an air inlet channel communicated with the annular gap pressure maintaining belt is formed in a position, corresponding to the right end of the sealing sleeve, on the shell, and an oil inlet channel communicated with the lubricating oil cavity is formed in the shell.
2. The sealing structure suitable for use in a complex slag-water environment according to claim 1, wherein: the thickness of the annular gap pressure maintaining belt in the radial direction of the sealing sleeve is 0.5 mm-2 mm, and the length of the annular gap pressure maintaining belt in the axial direction of the sealing sleeve is 20 mm-30 mm.
3. The sealing structure suitable for use in a complex slag-water environment according to claim 1, wherein: the sealing framework is made of nitrile rubber.
4. The sealing structure suitable for use in a complex slag-water environment according to claim 1, wherein: the right side cover of axle is equipped with sealed lid, sealed lid with casing is fixed and sealing connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111558220.2A CN114263744B (en) | 2021-12-20 | 2021-12-20 | Sealing structure suitable for under slag water complex environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111558220.2A CN114263744B (en) | 2021-12-20 | 2021-12-20 | Sealing structure suitable for under slag water complex environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114263744A CN114263744A (en) | 2022-04-01 |
| CN114263744B true CN114263744B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111558220.2A Active CN114263744B (en) | 2021-12-20 | 2021-12-20 | Sealing structure suitable for under slag water complex environment |
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| Country | Link |
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| CN (1) | CN114263744B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2111929U (en) * | 1991-11-23 | 1992-08-05 | 江苏省东台船用配件厂 | Water lubrication trailing axle sealing device |
| CN201436476U (en) * | 2009-06-20 | 2010-04-07 | 青岛达能环保设备有限公司 | External diversion type internal guide pulley mechanism for water sealing bearing |
| JP2011220465A (en) * | 2010-04-12 | 2011-11-04 | Kemel Co Ltd | Shaft seal device |
| CN204921880U (en) * | 2015-08-07 | 2015-12-30 | 大唐略阳发电有限责任公司 | Guide pulley combination bearing in external dragveyer |
| CN205037323U (en) * | 2015-04-27 | 2016-02-17 | 青岛正大正电力环保设备有限公司 | Dragveyer is with interior guide pulley of heavy load |
| CN205956384U (en) * | 2016-08-22 | 2017-02-15 | 东台船用配件有限公司 | Ship stern axle air formula oil lubrication sealing device |
| CN206410150U (en) * | 2017-01-16 | 2017-08-15 | 青岛达能环保设备股份有限公司 | Submerged slag conveyor external bearings Mechanical Sealed Type inner guide pulley device |
| CN208221363U (en) * | 2018-04-04 | 2018-12-11 | 青岛海洲电力设备有限公司 | Intelligent submerged slag conveyor inner guide pulley |
| CN212838980U (en) * | 2020-08-07 | 2021-03-30 | 新能凤凰（滕州）能源有限公司 | External slag extractor inner guide wheel with sealed structure and bearing |
-
2021
- 2021-12-20 CN CN202111558220.2A patent/CN114263744B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2111929U (en) * | 1991-11-23 | 1992-08-05 | 江苏省东台船用配件厂 | Water lubrication trailing axle sealing device |
| CN201436476U (en) * | 2009-06-20 | 2010-04-07 | 青岛达能环保设备有限公司 | External diversion type internal guide pulley mechanism for water sealing bearing |
| JP2011220465A (en) * | 2010-04-12 | 2011-11-04 | Kemel Co Ltd | Shaft seal device |
| CN205037323U (en) * | 2015-04-27 | 2016-02-17 | 青岛正大正电力环保设备有限公司 | Dragveyer is with interior guide pulley of heavy load |
| CN204921880U (en) * | 2015-08-07 | 2015-12-30 | 大唐略阳发电有限责任公司 | Guide pulley combination bearing in external dragveyer |
| CN205956384U (en) * | 2016-08-22 | 2017-02-15 | 东台船用配件有限公司 | Ship stern axle air formula oil lubrication sealing device |
| CN206410150U (en) * | 2017-01-16 | 2017-08-15 | 青岛达能环保设备股份有限公司 | Submerged slag conveyor external bearings Mechanical Sealed Type inner guide pulley device |
| CN208221363U (en) * | 2018-04-04 | 2018-12-11 | 青岛海洲电力设备有限公司 | Intelligent submerged slag conveyor inner guide pulley |
| CN212838980U (en) * | 2020-08-07 | 2021-03-30 | 新能凤凰（滕州）能源有限公司 | External slag extractor inner guide wheel with sealed structure and bearing |
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| CN114263744A (en) | 2022-04-01 |
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