CN105972214A - Dynamic sealing structure for gas-solid two-phase materials - Google Patents
Dynamic sealing structure for gas-solid two-phase materials Download PDFInfo
- Publication number
- CN105972214A CN105972214A CN201610525480.2A CN201610525480A CN105972214A CN 105972214 A CN105972214 A CN 105972214A CN 201610525480 A CN201610525480 A CN 201610525480A CN 105972214 A CN105972214 A CN 105972214A
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- Prior art keywords
- gas
- solid
- transmission shaft
- seal receptacle
- sealing structure
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a dynamic sealing structure for gas-solid two-phase materials, and aims to solve the problem that the gas-solid two-phase materials in an equipment cavity leaks during a conventional industrial process. Specifically, a gas material leaks outward at first, and then a solid material is driven to leak outwards along with the gas material. The solid material driven by a transmission shaft causes abrasion, and a conventional sealing structure is damaged by the abrasion. According to the technical scheme adopted by the dynamic sealing structure, a pneumatic blowback chamber is formed inside the high-pressure side of a sealing seat; a girth weld is arranged in the circumferential direction of the transmission shaft between the pneumatic blowback chamber and the equipment cavity; compressed air in the pneumatic blowback chamber is utilized for blowing materials which are about to be blown back to the equipment cavity through the girth weld; an oil pool is formed inside the low-pressure side of the sealing seat and filled with lubricating grease or lubricating oil; and an oil seal is arranged between the sealing seat and the transmission shaft, and used for preventing the lubricating grease or the lubricating oil in the oil pool from leaking outward. By adoption of the dynamic sealing structure disclosed by the invention, the problem about dynamic sealing of the gas-solid two-phase materials can be thoroughly solved; the user is convenient; the pressure-proof function can be achieved; and no leakage is generated.
Description
Technical field
The present invention relates to movable sealing field, a kind of for gas-solid two phase materials can pressure No leakage movable sealing structure.
Background technology
The machinery equipment used in process industrial is generally provided with sealing device, bad sealing can cause leakage, leakage can cause damage of the waste of the energy, the loss of logistics, the pollution of environment, the decline of product quality, equipment etc., serious leakage accident can affect the healthy of personnel, even lead to fire, set off an explosion, cause stopping production, bring huge personal safety and economic loss.
Most sealing device is directed to the sealing of liquid, gas material, water pump, oil pump, valve etc. are had for the sealing of liquid is conventional, having gas compressor, valve etc. for what Gaseous materials sealed, the kind of sealing has packing seal, mechanical seal and non-contacting seal.In actual application, having the material that gas-solid two-phase is complicated, in such as coal dust pumping procedure, its material is the material that a kind of coal dust mixes with gas；In some coal dust disintegrating apparatus, also there will be the similar dynamic sealing device being required for gas-solid two phase materials.The leakage of gas-solid two phase materials in equipment cavity, is first that Gaseous materials leaks out, and then drives solid material to continue past external leakage, and solid material is under the drive of power transmission shaft, because abrasion can produce destruction to sealing structure.For the movable sealing of gas-solid two phase materials of this complexity, market lacking the technology of successful Application, current technology all can not solve this problem well.As being arranged on the sealing structure of the coal powder spiral delivery pump below Pulverized Coal Bin in " a kind of long-distance pulverized coal conveying equipment " of Patent No. ZL201010260361.1, in " being applied to the pulverized coal preparation system of middle-size and small-size industrial coal powder boiler " of Patent No. 201310673846.7, raw coal is broken and is used for the pulverized coal conveying sealing structure etc. to the helix powder feeding machine of Pulverized Coal Bin.
Summary of the invention
The technical problem to be solved is the defect overcoming above-mentioned prior art to exist, it is provided that a kind of for gas-solid two phase materials can pressure No leakage movable sealing structure.
For this, the present invention adopts the following technical scheme that: a kind of movable sealing structure for gas-solid two phase materials, including the power transmission shaft being arranged on equipment and the seal receptacle being enclosed within power transmission shaft, one end of seal receptacle is that high-pressure side is connected with equipment cavity, directly contacting the material sealed, the other end of seal receptacle is low-pressure side；Described power transmission shaft is arranged on the center of seal receptacle, it is characterised in that
Described seal receptacle is on high-tension side is internally formed a strength blowback room, being provided with along the circumferentially disposed circumferential weld of power transmission shaft between this strength blowback room and equipment cavity, strength blowback room utilizes its interior compressed gas to be intended in the cavity that equipment is returned in the material blowback of leakage by circumferential weld；
Described seal receptacle low-pressure side be internally formed an oil sump, fill grease or lubricating oil in oil sump, between seal receptacle and power transmission shaft, be provided with oil sealing, grease or lubricating oil in preventing oil sump leak out.
The movable sealing structure of the present invention material from leakage that material is caused by drive axis in the cavity of water-tight equipment.Gas-solid two phase materials in equipment first passes through circumferential weld and enters strength blowback room, and under the drive of the compressed gas of blowback, material is returned by blowback in the cavity of equipment again.
Oil sealing in oil sump under the protection of grease, can stop grease to External leakage well, thus play effective sealing function；And use high voltage bearing oil sealing, higher pressure can be born, thereby ensure that the blowback compressed gas in strength blowback room does not exist leakage in the outside of seal receptacle, it is ensured that purge gas is all blown in the cavity of equipment.
Further, forming a packing seal room between strength blowback room and oil sump in described seal receptacle, filler is filled in this packing seal room.Having a small amount of material to be also possible to enter at packing seal room by strength blowback room, now the filler in packing seal room plays the effect that material leaks outward that again cuts off.
Further, it is positioned on the seal receptacle at packing seal room and has a replacement mouth, at this replacement mouth, be provided with a sealing lid being connected on seal receptacle outer wall.Filler is changed by replacement mouth.
Further, described filler comprises flexible filler.
Further, described seal receptacle arranges lubricating oil inlet, in filler, inject lubricating oil by lubricating oil inlet, make to be formed between filler and power transmission shaft oil film, play sealing function.
Further, described strength blowback room is provided with a compressed gas access port, and the compressed gas for blowback enters from this access port.
Further, the structure of described circumferential weld can also have following two kinds of situations:
1) on the power transmission shaft described in, fixing connection one is positioned at the dynamic ring catch at gas outlet, strength blowback room, forms a plurality of groove on the dynamic ring catch of equipment cavity side；A quiet ring catch it is provided with in the housing of described equipment, the a plurality of convex tendon used with the groove fit on dynamic ring catch is formed on this quiet ring catch, forming described circumferential weld between quiet ring catch and power transmission shaft, between groove and convex tendon and between dynamic ring catch and seal receptacle, this circumferential weld is labyrinth shape.In the case of seal failure, the material flowed out in equipment cavity body is played and stops the effect slowed down by labyrinth shape circumferential weld, reduces the leakage of material.
2) on the power transmission shaft described in, fixing connection one collar stop, forms described circumferential weld between collar stop and seal receptacle, and this circumferential weld is in folding shape.In the case of seal failure, the circumferential weld of folding shape also can play and stop the effect slowed down, and reduces the leakage of material.
Further, use flange and bolt to be connected between end and the housing of equipment of described seal receptacle, between two flanges, be provided with gasket seal.
In the sealing structure of the present invention, first protection is strength blowback room；Second protection is packing seal room, and a small amount of solid particle is also possible to enter packing seal room by strength blowback room, and now the effect that material leaks outward that again cuts off is played in packing seal room.Being filled with flexible filler etc. in packing seal room, and can fill lubricating oil, lubricating oil makes to be formed between filler and power transmission shaft one layer of oil film, effectively stops gas-solid two phase materials to continue toward External leakage.
In the sealing structure of the present invention, 3rd road protection is mounted in the combinative structure of the outermost oil sump of seal receptacle and oil sealing, this section of combinative structure is by grease and oil sealing collaborative work, even if ensureing also will not produce with the presence of high pressure leakage in equipment, in the structure design of whole sealing, it is not have solid particle to leak in oil sump during this oil sump and the combinative structure work of oil sealing, is the most also not result in sealing structural damage.
In the sealing structure of the present invention, the 3rd road protection, because there being above two road protection to increase the pressure loss, alleviates the resistance to pressure request of oil sealing, also allows for sealing structure long-time stable work.
The present invention can thoroughly solve the movable sealing problem of gas-solid two phase materials, easy to use, can be pressure, will not produce leakage.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2-3 is the other two kinds of structural representations flow direction of compressed gas (arrow in figure represent) of circumferential weld of the present invention.
Fig. 4 is the enlarged drawing in A portion in Fig. 2.
Fig. 5 is the structural representation of oil sump of the present invention and oil sealing.
Fig. 6 is the structural representation of packing seal room of the present invention.
In figure, 1-power transmission shaft, 2-seal receptacle, 3-oil sealing, 4-oil sump, 5-packing seal room, 6-strength blowback room, 7-seals lid, 8-circumferential weld, 9-compressed gas access port, 10-equipment, 11-filler, 12-collar stop, and the quiet ring catch of 13-, 14-moves ring catch.
Detailed description of the invention
Embodiments of the invention are provided, to describe technical scheme in detail below in conjunction with Figure of description.
The movable sealing structure of the coal powder spiral pump as shown in Fig. 1,4-5, in order to ensure that pressure is that 30kpa fineness is the coal dust of 200 mesh and the gas-solid two-phase material pressure of air squeezes into Pulverized Coal Bin or burner by coal dust pump, whole process No leakage, pollution-free, the movable sealing structure of whole coal dust pump is made up of three roads protection.
Movable sealing structure for gas-solid two phase materials installs power transmission shaft 1 on device 10, seal receptacle 2 it is cased with on power transmission shaft 1, power transmission shaft 1 is arranged on the center of seal receptacle 2, arrange one in seal receptacle 2 and be formed close to the strength blowback room 6 that equipment 10 cavity is arranged, there is a compressed gas access port 9 strength blowback room 6, is formed along the circumferentially disposed circumferential weld 8 of power transmission shaft between seal receptacle 2 and power transmission shaft 1.Strength blowback room 6 utilizes its interior compressed gas to be returned in the cavity of equipment 10 by the material blowback that circumferential weld 8 is intended to leak.
Being formed in described seal receptacle 2 and be positioned at the packing seal room 5 outside strength blowback room 6, filler 11 is filled in this packing seal room 5.It is positioned on the seal receptacle 2 at packing seal room 5 and has replacement mouth, at this replacement mouth, be provided with the sealing lid 7 being connected on seal receptacle outer wall.Described filler comprises flexible filler, and seal receptacle 2 arranges lubricating oil inlet, injects lubricating oil by lubricating oil inlet in filler 11, makes to be formed between filler 11 and power transmission shaft 1 oil film.
Being provided with one in described seal receptacle 2 and be positioned at the oil sump 4 outside packing seal room 5, fill grease or lubricating oil, be provided with oil sealing 3 between seal receptacle 2 and power transmission shaft 1 in oil sump 4, grease or lubricating oil in preventing oil sump 4 leak out.
Described circumferential weld can also use following structure: on power transmission shaft, fixing connection is positioned at the dynamic ring catch 12 at gas outlet, strength blowback room 6, forms a plurality of groove on the dynamic ring catch 14 of equipment cavity side；Quiet ring catch 13 it is provided with in the housing of described equipment, the a plurality of convex tendon used with the groove fit on dynamic ring catch 14 is formed on this quiet ring catch 13, circumferential weld 8 is formed between quiet ring catch 13 and power transmission shaft, between groove and convex tendon and between dynamic ring catch 14 and seal receptacle 2, this circumferential weld 8 is in labyrinth shape, as shown in Figure 2,4.
Described circumferential weld can also use following structure: fixing connection one collar stop 12 on described power transmission shaft, formation circumferential weld 8 between collar stop 12 and seal receptacle, this circumferential weld 8 is in folding shape, as shown in Figure 3.
Use flange and bolt to be connected between end and the housing of equipment of described seal receptacle 2, between two flanges, be provided with gasket seal.
The above, be only presently preferred embodiments of the present invention, and not the structure to the present invention makees any pro forma restriction.Every any simple modification, equivalent variations and modification made above example according to the technical spirit of the present invention, each falls within protection scope of the present invention.
Claims (9)
1. the movable sealing structure for gas-solid two phase materials, including the power transmission shaft (1) being arranged on equipment (10) and the seal receptacle (2) being enclosed within power transmission shaft, one end of seal receptacle (2) is that high-pressure side is connected with equipment (10) cavity, directly contacting the material sealed, the other end of seal receptacle (2) is low-pressure side；Described power transmission shaft (1) is arranged on the center of seal receptacle (2), it is characterised in that
Described seal receptacle (2) is on high-tension side is internally formed a strength blowback room (6), being provided with along the circumferentially disposed circumferential weld (8) of power transmission shaft between this strength blowback room (6) and equipment (10) cavity, strength blowback room (6) utilizes its interior compressed gas to be intended in the cavity that equipment (10) are gone back in the material blowback of leakage by circumferential weld (8)；
Described seal receptacle (2) low-pressure side be internally formed an oil sump (4), fill grease or lubricating oil in oil sump (4), between seal receptacle (2) and power transmission shaft (1), be provided with oil sealing (3), be used for preventing the grease in oil sump (4) or lubricating oil from leaking out.
Movable sealing structure for gas-solid two phase materials the most according to claim 1, it is characterized in that, forming a packing seal room (5) being positioned between strength blowback room (6) and oil sump (4) in described seal receptacle (2), filler (11) is filled in this packing seal room (5).
Movable sealing structure for gas-solid two phase materials the most according to claim 2, it is characterized in that, it is positioned on the seal receptacle (2) at packing seal room (5) place and has a replacement mouth, at this replacement mouth, be provided with a sealing lid (7) being connected on seal receptacle outer wall.
Movable sealing structure for gas-solid two phase materials the most according to claim 2, it is characterised in that described filler comprises flexible filler.
Movable sealing structure for gas-solid two phase materials the most according to claim 4, it is characterized in that, on described seal receptacle (2), lubricating oil inlet is set, in filler (11), injects lubricating oil by lubricating oil inlet, make to be formed between filler (11) and power transmission shaft (1) oil film.
6. according to the movable sealing structure for gas-solid two phase materials described in any one of claim 1-5, it is characterised in that described strength blowback room (6) is provided with a compressed gas access port (9).
7. according to the movable sealing structure for gas-solid two phase materials described in any one of claim 1-5, it is characterized in that, on described power transmission shaft, fixing connection one is positioned at the dynamic ring catch (14) at strength blowback room (6) gas outlet, and the dynamic ring catch (14) near equipment cavity side is upper forms a plurality of groove；A quiet ring catch (13) it is provided with in the housing of described equipment, this quiet ring catch (13) is upper forms a plurality of convex tendon used with the groove fit on dynamic ring catch (14), forming described circumferential weld (8) between quiet ring catch (13) and power transmission shaft, between groove and convex tendon and between dynamic ring catch (14) and seal receptacle (2), this circumferential weld (8) is in labyrinth shape.
8. according to the movable sealing structure for gas-solid two phase materials described in any one of claim 1-5, it is characterized in that, on described power transmission shaft, fixing connection one collar stop (12), forms described circumferential weld (8) between collar stop (12) and seal receptacle, and this circumferential weld (8) is in folding shape.
9. according to the movable sealing structure for gas-solid two phase materials described in any one of claim 1-5, it is characterised in that use flange and bolt to be connected between end and the housing of equipment of described seal receptacle (2), be provided with gasket seal between two flanges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525480.2A CN105972214A (en) | 2016-07-05 | 2016-07-05 | Dynamic sealing structure for gas-solid two-phase materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525480.2A CN105972214A (en) | 2016-07-05 | 2016-07-05 | Dynamic sealing structure for gas-solid two-phase materials |
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| Publication Number | Publication Date |
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| CN105972214A true CN105972214A (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610525480.2A Pending CN105972214A (en) | 2016-07-05 | 2016-07-05 | Dynamic sealing structure for gas-solid two-phase materials |
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| CN (1) | CN105972214A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314101A (en) * | 2017-08-12 | 2017-11-03 | 江苏星宇电机有限公司 | A kind of reducing motor of anti-oil leak |
| CN110793588A (en) * | 2019-11-19 | 2020-02-14 | 重庆前卫科技集团有限公司 | Direct drive set and method of assembling same |
| CN111926144A (en) * | 2020-09-02 | 2020-11-13 | 苏州大学 | Rotary joint for converter powder injection and powder conveying pipe grinding treatment method |
| CN113027808A (en) * | 2021-05-13 | 2021-06-25 | 毅飞泵业（福州）有限公司 | Centrifugal pump |
| CN114001159A (en) * | 2020-07-28 | 2022-02-01 | 上海汽车集团股份有限公司 | Sealing device of air compressor |
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| JP2012036926A (en) * | 2010-08-04 | 2012-02-23 | Nippon Pillar Packing Co Ltd | Double seal structure |
| CN102691796A (en) * | 2011-03-23 | 2012-09-26 | 刘森钢 | Axial blowing device of high-speed electric spindle |
| CN204061914U (en) * | 2014-07-31 | 2014-12-31 | 营口桃仙制药设备有限公司 | A kind of sealing mechanism |
| CN205745288U (en) * | 2016-07-05 | 2016-11-30 | 杭州全合科技有限公司 | A kind of movable sealing structure for gas-solid two phase materials |
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| CN101639124A (en) * | 2009-08-11 | 2010-02-03 | 湖北宜都运机机电设备有限责任公司 | Nitrogen sealing device |
| CN201593608U (en) * | 2010-02-03 | 2010-09-29 | 洛阳芳华机械制造有限公司 | Two-stage seal floating shaft seal of transmission shaft of coal pulverizer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314101A (en) * | 2017-08-12 | 2017-11-03 | 江苏星宇电机有限公司 | A kind of reducing motor of anti-oil leak |
| CN110793588A (en) * | 2019-11-19 | 2020-02-14 | 重庆前卫科技集团有限公司 | Direct drive set and method of assembling same |
| CN114001159A (en) * | 2020-07-28 | 2022-02-01 | 上海汽车集团股份有限公司 | Sealing device of air compressor |
| CN111926144A (en) * | 2020-09-02 | 2020-11-13 | 苏州大学 | Rotary joint for converter powder injection and powder conveying pipe grinding treatment method |
| CN113027808A (en) * | 2021-05-13 | 2021-06-25 | 毅飞泵业（福州）有限公司 | Centrifugal pump |
| CN113027808B (en) * | 2021-05-13 | 2022-12-20 | 毅飞泵业（福州）有限公司 | Centrifugal pump |
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Application publication date: 20160928 |