CN116576255B - Bioreactor (mixing) shaft sealing device - Google Patents
Bioreactor (mixing) shaft sealing device Download PDFInfo
- Publication number
- CN116576255B CN116576255B CN202310857309.1A CN202310857309A CN116576255B CN 116576255 B CN116576255 B CN 116576255B CN 202310857309 A CN202310857309 A CN 202310857309A CN 116576255 B CN116576255 B CN 116576255B
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- Prior art keywords
- mounting seat
- sealing
- ring
- mount pad
- stirring shaft
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- 238000007789 sealing Methods 0.000 title claims abstract description 92
- 238000002156 mixing Methods 0.000 title claims description 4
- 238000003756 stirring Methods 0.000 claims abstract description 48
- 230000017525 heat dissipation Effects 0.000 claims abstract description 31
- 125000006850 spacer group Chemical group 0.000 claims abstract description 13
- 239000011148 porous material Substances 0.000 claims description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 55
- 239000010687 lubricating oil Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 description 30
- 238000009434 installation Methods 0.000 description 11
- 238000009837 dry grinding Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000008827 biological function Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108010093096 Immobilized Enzymes Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 210000001822 immobilized cell Anatomy 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/38—Caps; Covers; Plugs; Pouring means
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/02—Stirrer or mobile mixing elements
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M37/00—Means for sterilizing, maintaining sterile conditions or avoiding chemical or biological contamination
- C12M37/04—Seals
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3296—Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Zoology (AREA)
- Mechanical Engineering (AREA)
- Microbiology (AREA)
- Sustainable Development (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Clinical Laboratory Science (AREA)
- Sealing Of Bearings (AREA)
Abstract
The invention discloses a stirring shaft sealing device of a bioreactor, which comprises a stirring shaft, wherein a first mounting seat is sleeved on the periphery of the stirring shaft, a sealing ring is embedded at the inner bottom end of the first mounting seat, a second mounting seat is sleeved inside the first mounting seat, a bearing assembly is embedded at the inner bottom end of the second mounting seat, a third mounting seat is connected at the bottom end of the second mounting seat, a heat dissipation assembly is arranged at the bottom end of the third mounting seat, and the stirring shaft sequentially penetrates through the first mounting seat, the second mounting seat and the third mounting seat from top to bottom. According to the invention, the sealing effect is achieved through the sealing lips on the upper side and the lower side of the sealing ring and the spacer ring in the middle, so that the leakage of liquid in the reaction kettle can be effectively avoided; meanwhile, after the sealing ring is used for a long time, the oil ring in the groove is extruded through the stirring shaft, so that lubricating oil in the oil ring is extruded, and the sealing lip and the spacer ring are lubricated through the oil delivery hole.
Description
Technical Field
The invention relates to the field of bioreactors, in particular to a sealing device for a stirring shaft of a bioreactor.
Background
The bioreactor is a device system for performing biochemical reaction in vitro by utilizing biological functions of enzymes or organisms (such as microorganisms), and is a biological function simulator such as a fermentation tank, immobilized enzymes or immobilized cell reactors. Has important application in the aspects of wine, medicine production, concentrated jam, fruit juice fermentation and organic pollutant degradation.
At present, a stirring shaft of a biological reaction kettle is generally in rotary connection with the outside of the reaction kettle by adopting a sealing ring and a bearing in a matched mode, and a sealed part is fixed by means of a locking sleeve, so that the situation that the sealing part falls off after the stirring shaft rotates for a long time is avoided. The sealing mode is rotary sealing, namely the actual effect of preventing the intercommunication of liquid, impurities and the like in the internal and external environments of the reaction kettle under the condition that the rotating shaft (namely the stirring shaft) rotates. In general, the inner diameter of the sealing ring lip is smaller than the diameter of the shaft neck, and axial working pressure is generated on the outer surface of the shaft neck, but dry grinding is generated between the sealing ring lip and the stirring shaft after oil film on the sealing ring is completely lost, so that the sealing performance is ineffective.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a sealing device for a stirring shaft of a bioreactor.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a stirring shaft sealing device of a bioreactor, which comprises a stirring shaft, wherein a first mounting seat is sleeved on the periphery of the stirring shaft, a sealing ring is embedded at the inner bottom end of the first mounting seat, a second mounting seat is sleeved in the first mounting seat, a bearing assembly is embedded at the inner bottom end of the second mounting seat, a third mounting seat is connected at the bottom end of the second mounting seat, a dust-proof assembly is arranged at the bottom end of the third mounting seat, and the stirring shaft sequentially penetrates through the first mounting seat, the second mounting seat and the third mounting seat from top to bottom.
As a preferable technical scheme of the invention, the upper end and the lower end of the inner side of the sealing ring are respectively provided with a raised sealing lip, the middle part of the inner side of the sealing ring is provided with a raised spacing ring, the middle part of the outer side of the sealing ring is provided with a groove, the inside of the groove is provided with an oil ring, the inner side of the oil ring is connected with an oil delivery nozzle, the inside of the sealing ring is transversely provided with a first oil delivery pore canal, and the inside of the spacing ring is longitudinally provided with a second oil delivery pore canal.
As a preferable technical scheme of the invention, the oil delivery nozzle is communicated with the first oil delivery pore canal, the first oil delivery pore canal is communicated with the second oil delivery pore canal, the oil ring is made of flexible ABS plastic material, the sealing lips are triangular bulges, the spacing ring is trapezoidal bulges, and the sealing lips and the spacing ring are tangential to the outer wall of the stirring shaft.
As a preferable technical scheme of the invention, the bearing assembly comprises a first bearing, a second bearing, a graphite oil seal and a sealing piece, wherein the graphite oil seal is clamped between the first bearing and the second bearing, the sealing piece is arranged at the top end of the first bearing and the bottom end of the second bearing, the periphery of the bearing assembly is coated with a heat conducting piece, a plurality of first heat dissipation pore channels are formed in the second mounting seat, and one end of each first heat dissipation pore channel is communicated with a second heat dissipation pore channel.
As a preferable technical scheme of the invention, a plurality of third heat dissipation pore canals are longitudinally formed in the third mounting seat, the third heat dissipation pore canals are distributed in a ring in an outward diffusion manner, the third heat dissipation pore canals of the outer ring are butted with the second heat dissipation pore canals, the periphery of the heat conducting fin is butted with the second heat dissipation pore canals, and the bottom ends of the heat conducting fin are butted with the inner ring of the third heat dissipation pore canals.
As a preferable technical scheme of the invention, the dustproof assembly comprises an impeller, an outer protective cover and an inner protective cover, wherein the impeller is sleeved on the outer peripheral surface of the stirring shaft, the outer protective cover is arranged at the bottom end of the third mounting seat, a plurality of first openings are formed in the surface of the outer protective cover, the inner protective cover is sleeved inside the outer protective cover, a plurality of second openings are formed in the surface of the inner protective cover, the bottom end of the inner protective cover is connected with a rotary drum, the rotary drum penetrates to the bottom end of the outer protective cover, a limiting piece is arranged on the outer side of the rotary drum, and the limiting piece is positioned at the bottom end of the outer protective cover.
As a preferable technical scheme of the invention, the first mounting seat is fixedly connected with the second mounting seat and the third mounting seat through the screw, the section of the third mounting seat is of a convex structure, and the top end of the periphery of the first mounting seat is provided with a trapezoid snap ring structure for positioning and mounting.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the sealing effect is achieved through the sealing lips on the upper side and the lower side of the sealing ring and the spacer ring in the middle, so that the leakage of liquid in the reaction kettle can be effectively avoided; meanwhile, after the sealing ring is used for a long time, the oil ring in the groove is extruded through the stirring shaft, so that lubricating oil in the oil ring is extruded, and the sealing lip and the spacer ring are lubricated through the oil delivery hole, namely, the sealing effect is prevented from being influenced by dry grinding between the sealing ring and the stirring shaft, and the practical service life of the sealing ring is prolonged; the bearing is sealed through the graphite oil seal and the sealing piece, the inner space of the bearing is isolated, the lubricating oil on the bearing is prevented from evaporating, the bearing can bear radial load, and the shaking of the outer end part of the stirring shaft is prevented; meanwhile, the air in the protective cover is driven by the impeller connected with the stirring shaft, so that heat generated by the bearing during operation is conducted out through the heat conducting fin and then rapidly dissipated, deformation caused by long-time working overheat of the bearing is avoided, the inner protective cover is driven to rotate by the rotary drum, openings on the inner protective cover and the outer protective cover are staggered, and accordingly the bottom leakage part of the dustproof assembly is closed, and dust is prevented from entering the interior during idle; meanwhile, the installation seats are sequentially sleeved and connected, so that the installation is convenient.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a cross-sectional view of the overall structure of the present invention;
FIG. 2 is a schematic view of a seal ring cut-off structure of the present invention;
FIG. 3 is a schematic cross-sectional view of an oil ring of the present invention;
fig. 4 is an enlarged view of the a portion structure in fig. 2;
FIG. 5 is a schematic cross-sectional view of a bearing assembly of the present invention;
FIG. 6 is an exploded schematic view of the bearing assembly of the present invention;
FIG. 7 is a schematic cross-sectional view of a second mount of the present invention;
FIG. 8 is a schematic cross-sectional view of a third mount of the present invention;
FIG. 9 is a top view of a third mount of the present invention;
FIG. 10 is a schematic cross-sectional view of a dust assembly of the present invention;
FIG. 11 is a schematic view of the outer shield of the present invention detached from the inner shield;
in the figure: 1. a stirring shaft; 2. a first mount; 3. a seal ring; 4. a second mounting base; 5. a bearing assembly; 6. a third mount; 7. a dust-proof assembly; 31. a sealing lip; 32. a spacer ring; 33. a groove; 34. an oil ring; 35. an oil delivery nozzle; 36. a first oil delivery duct; 37. the second oil delivery duct; 51. a first bearing; 52. a second bearing; 53. a graphite oil seal; 54. a sealing sheet; 55. a heat conductive sheet; 56. a first heat dissipation duct; 57. the second heat dissipation pore canal; 61. a third heat dissipation duct; 71. an impeller; 72. an outer shield; 73. an inner shield; 74. a first opening; 75. a second opening; 76. a rotating drum; 77. and a limiting piece.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Examples
As shown in fig. 1-11, the invention provides a stirring shaft sealing device of a bioreactor, which comprises a stirring shaft 1, wherein a first mounting seat 2 is sleeved on the periphery of the stirring shaft 1, a sealing ring 3 is embedded at the inner bottom end of the first mounting seat 2, a second mounting seat 4 is sleeved in the first mounting seat 2, a bearing assembly 5 is embedded at the inner bottom end of the second mounting seat 4, a third mounting seat 6 is connected at the bottom end of the second mounting seat 4, a dustproof assembly 7 is arranged at the bottom end of the third mounting seat 6, and the stirring shaft 1 sequentially penetrates through the first mounting seat 2, the second mounting seat 4 and the third mounting seat 6 from top to bottom.
Further, both ends all are provided with bellied seal lip 31 about the inboard of sealing washer 3, and the inboard middle part of sealing washer 3 is provided with bellied spacer ring 32, and open at the outside middle part of sealing washer 3 has recess 33, and the internally mounted of recess 33 has oil ring 34, and the inboard of oil ring 34 is connected with defeated oil mouth 35, and the inside of sealing washer 3 transversely is provided with first defeated oil duct 36, and the inside of spacer ring 32 vertically is provided with second defeated oil duct 37.
The oil delivery nozzle 35 is communicated with a first oil delivery pore canal 36, the first oil delivery pore canal 36 is communicated with a second oil delivery pore canal 37, the oil ring 34 is made of flexible ABS plastic, the sealing lip 31 is a triangular bulge, the spacing ring 32 is a trapezoid bulge, and the sealing lip 31 and the spacing ring 32 are tangent to the outer wall of the stirring shaft 1.
The bearing assembly 5 comprises a first bearing 51, a second bearing 52, a graphite oil seal 53 and a sealing sheet 54, the graphite oil seal 53 is clamped between the first bearing 51 and the second bearing 52, the sealing sheet 54 is arranged at the top end of the first bearing 51 and the bottom end of the second bearing 52, the heat conducting sheet 55 is coated on the periphery of the bearing assembly 5, a plurality of first heat dissipation pore passages 56 are formed in the second mounting seat 4, and one end of each first heat dissipation pore passage 56 is communicated with a second heat dissipation pore passage 57.
A plurality of third heat dissipation pore canals 61 are longitudinally formed in the third mounting seat 6, the third heat dissipation pore canals 61 are distributed in a ring-shaped outward diffusion mode, the third heat dissipation pore canals 61 of the outer ring are butted with the second heat dissipation pore canals 57, the periphery of the heat conducting fin 55 is butted with the second heat dissipation pore canals 57, and the bottom ends of the heat conducting fin 55 are butted with the inner ring of the third heat dissipation pore canals 61.
The dustproof assembly 7 comprises an impeller 71, an outer protective cover 72 and an inner protective cover 73, wherein the impeller 71 is sleeved on the outer peripheral surface of the stirring shaft 1, the outer protective cover 72 is installed at the bottom end of the third installation seat 6, a plurality of first openings 74 are formed in the surface of the outer protective cover 72, the inner protective cover 73 is sleeved inside the outer protective cover 72, a plurality of second openings 75 are formed in the surface of the inner protective cover 73, the bottom end of the inner protective cover 73 is connected with a rotary drum 76, the rotary drum 76 penetrates through the bottom end of the outer protective cover 72, a limiting piece 77 is arranged on the outer side of the rotary drum 76, and the limiting piece 77 is located at the bottom end of the outer protective cover 72.
The first installation seat 2 is fixedly connected with the second installation seat 4 and the third installation seat 6 through a screw rod, the section of the third installation seat 6 is of a convex structure, and the top end of the periphery of the first installation seat 2 is provided with a trapezoid clamping ring structure for positioning and installation.
Specifically, first, the first mounting seat 2, the sealing ring 3, the second mounting seat 4, the bearing assembly 5 and the third mounting seat 6 are sleeved on the periphery of the stirring shaft 1, the mounting seats are fixedly connected through a screw rod, then the impeller 71 in the dustproof assembly 7 is fixed on the stirring shaft through a machine meter screw, and the whole sealing device is fixed outside the reaction kettle through a locking sleeve to avoid falling after the outer protective cover 72 is covered; when the stirring shaft 1 rotates, the sealing lips 31 and the spacing rings 32 on the upper side and the lower side of the sealing ring 3 play a sealing role, and as the sealing ring 3 is provided with a thin oil film in the initial stage of use, the oil film can play a sealing role, and meanwhile, dry grinding can not be generated between the sealing ring 3 and the stirring shaft 1; after a certain period of use, the oil films on the sealing lip 31 and the spacing ring 32 gradually decrease, the friction between the oil films and the stirring shaft 1 increases, and as the friction increases, the outward extrusion force generated on the sealing lip 31 and the spacing ring 32 when the stirring shaft 1 rotates increases, the sealing lip 31 at the upper end and the lower end and the spacing ring 32 in the middle are subjected to outward extrusion, so that the groove 33 areas at the two sides of the sealing ring 3 are extruded; the oil ring 34 in the groove 33 is extruded and deformed, so that the internal lubricating oil is extruded from the oil delivery nozzle 35 to reach the position of the spacer ring 32 through the first oil delivery pore canal 36, and then discharged through the second oil delivery pore canal 37 on the spacer ring 32, the lubricating oil flows to the area between the sealing lip 31 and the spacer ring 32, so that dry grinding can not be generated between the sealing ring 3 and the stirring shaft 1, the service life of the sealing ring is prolonged, the sealing effect is ensured, the friction force between the sealing ring 3 and the stirring shaft 1 is reduced after lubrication, and the oil ring 34 rebounds to enable the extruded lubricating oil to be sucked back into the oil ring 34 in a countercurrent manner, so that excessive lubrication oil leakage is avoided; the graphite oil seal 53 is arranged between the first bearing 51 and the second bearing 52, the sealing effect is achieved by matching with the sealing sheets 54 on two sides, meanwhile, air is arranged in the bearings, when the stirring shaft 1 rotates, the air is compressed to generate thrust, the first bearing 51 and the second bearing 52 bear radial load, at the moment, the graphite oil seal 53 and the sealing sheets 54 play a role in sealing, the pressure in the bearings is guaranteed, and the lubricating oil on the bearings is prevented from evaporating; the heat generated by the bearing in the high-speed rotation process is firstly dissipated to the first heat dissipation pore canal 56 and the third heat dissipation pore canal 61 through the heat conducting fin 55, and the hot air of the first heat dissipation pore canal 56 enters the dust prevention component 7 through the second heat dissipation pore canal 57; the stirring shaft 1 drives the impeller 71 to rotate, and the impeller 71 rotates to stir the air in the inner protective cover 73, so that the air inside and outside can flow in an accelerating way, and the inner bearing assembly 5 is cooled; after the use, the rotary drum 76 is rotated, so that the rotary drum 76 drives the inner shield 73 to rotate, the positions of the second opening 75 and the first opening 74 on the outer shield 72 are staggered by the rotation of the inner shield 73, and the inner shield 73 and the outer shield 72 form a sealed space, so that long-time idle dust is prevented from entering the interior.
According to the invention, the sealing effect is achieved through the sealing lips on the upper side and the lower side of the sealing ring and the spacer ring in the middle, so that the leakage of liquid in the reaction kettle can be effectively avoided; meanwhile, after the sealing ring is used for a long time, the oil ring in the groove is extruded through the stirring shaft, so that lubricating oil in the oil ring is extruded, and the sealing lip and the spacer ring are lubricated through the oil delivery hole, namely, the sealing effect is prevented from being influenced by dry grinding between the sealing ring and the stirring shaft, and the practical service life of the sealing ring is prolonged; the bearing is sealed through the graphite oil seal and the sealing piece, the inner space of the bearing is isolated, the lubricating oil on the bearing is prevented from evaporating, the bearing can bear radial load, and the shaking of the outer end part of the stirring shaft is prevented; meanwhile, the air in the protective cover is driven by the impeller connected with the stirring shaft, so that heat generated by the bearing during operation is conducted out through the heat conducting fin and then rapidly dissipated, deformation caused by long-time working overheat of the bearing is avoided, the inner protective cover is driven to rotate by the rotary drum, openings on the inner protective cover and the outer protective cover are staggered, and accordingly the bottom leakage part of the dustproof assembly is closed, and dust is prevented from entering the interior during idle; meanwhile, the installation seats are sequentially sleeved and connected, so that the installation is convenient.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The utility model provides a bioreactor (mixing) shaft sealing device, includes (1) stirring shaft, its characterized in that, the periphery of (1) stirring shaft has cup jointed first mount pad (2), the inside bottom of first mount pad (2) is inlayed and is equipped with sealing washer (3), the inside of first mount pad (2) has cup jointed second mount pad (4), the inside bottom of second mount pad (4) is inlayed and is equipped with bearing assembly (5), the bottom of second mount pad (4) is connected with third mount pad (6), dustproof subassembly (7) are installed to the bottom of third mount pad (6), stirring shaft (1) is from top to bottom passed first mount pad (2), second mount pad (4) and third mount pad (6) in proper order, both ends all are provided with bellied sealing lip (31) about the inboard of sealing washer (3), the inboard middle part of sealing washer (3) is provided with bellied ring (32), the outside middle part of sealing washer (3) is equipped with recess (33), the bottom of second mount pad (34) is connected with oil delivery ring (34), the inside of oil delivery ring (35) is provided with vertical spacer channel (37), the oil delivery nozzle (35) is communicated with the first oil delivery pore canal (36), the first oil delivery pore canal (36) is communicated with the second oil delivery pore canal (37), the oil ring (34) is made of flexible ABS plastic material, the sealing lips (31) are triangular bulges, the spacing ring (32) is trapezoidal bulges, the sealing lips (31) and the spacing ring (32) are tangential to the outer wall of the stirring shaft (1), the bearing assembly (5) comprises a first bearing (51), a second bearing (52), a graphite oil seal (53) and sealing fins (54), the graphite oil seal (53) is clamped between the first bearing (51) and the second bearing (52), the sealing fins (54) are arranged at the top end of the first bearing (51) and the bottom end of the second bearing (52), the outer periphery of the bearing assembly (5) is coated with heat conducting fins (55), a plurality of first heat dissipation pore canals (56) are arranged inside the second mounting seat (4), one end of the first heat dissipation pore canal (56) is tangential to the outer ring (61) and is provided with a third heat dissipation pore canal (61) which is distributed in a longitudinal direction, the periphery of conducting strip (55) offsets with second heat dissipation pore (57), the bottom of conducting strip (55) offsets with the inner circle of third heat dissipation pore (61), dustproof subassembly (7) include impeller (71), outer protection casing (72) and interior protection casing (73), impeller (71) cup joint in the periphery surface of (mixing) shaft (1), outer protection casing (72) are installed in the bottom of third mount pad (6), open on the surface of outer protection casing (72) has a plurality of first openings (74), interior protection casing (73) cup joint in the inside of outer protection casing (72), open on the surface of interior protection casing (73) has a plurality of second openings (75), the bottom of interior protection casing (73) is connected with rotary drum (76), rotary drum (76) run through to the bottom of outer protection casing (72), the outside of rotary drum (76) is provided with spacing piece (77), and spacing piece (77) are located the bottom of outer protection casing (72).
2. The stirring shaft sealing device for the bioreactor according to claim 1, wherein the first mounting seat (2) is fixedly connected with the second mounting seat (4) and the third mounting seat (6) through a screw, the section of the third mounting seat (6) is of a convex structure, and a trapezoid clamping ring structure for positioning and mounting is arranged at the top end of the periphery of the first mounting seat (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310857309.1A CN116576255B (en) | 2023-07-13 | 2023-07-13 | Bioreactor (mixing) shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310857309.1A CN116576255B (en) | 2023-07-13 | 2023-07-13 | Bioreactor (mixing) shaft sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| CN116576255A (en) | 2023-08-11 |
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