CN109356880B - Shaft seal and fan - Google Patents

Shaft seal and fan Download PDF

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Publication number
CN109356880B
CN109356880B CN201811501400.5A CN201811501400A CN109356880B CN 109356880 B CN109356880 B CN 109356880B CN 201811501400 A CN201811501400 A CN 201811501400A CN 109356880 B CN109356880 B CN 109356880B
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CN
China
Prior art keywords
sealing
seal
shell
main shaft
air outlet
Prior art date
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Active
Application number
CN201811501400.5A
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Chinese (zh)
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CN109356880A (en
Inventor
郝德华
陆仲麟
刘艳华
吴玲
林立庆
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Jinan Fan Factory Co ltd
Original Assignee
Jinan Fan Factory Co ltd
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Publication date
Application filed by Jinan Fan Factory Co ltd filed Critical Jinan Fan Factory Co ltd
Priority to CN201811501400.5A priority Critical patent/CN109356880B/en
Publication of CN109356880A publication Critical patent/CN109356880A/en
Application granted granted Critical
Publication of CN109356880B publication Critical patent/CN109356880B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/122—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention provides a shaft seal and a fan, which relate to the technical field of rotating shaft sealing, and comprise a seal shell, a seal assembly and an air source assembly, wherein the seal shell is sleeved on a fan main shaft, one side of the seal shell is connected with the outer wall of the fan shell, the seal assembly is clamped between the seal shell and the fan main shaft, the seal assembly is connected with the seal shell, one end of the seal assembly, which is far away from the seal shell, is abutted with the fan main shaft, the air source assembly is connected with the seal shell through an adjusting bracket, the air outlet end of the air source assembly is communicated with a seal cavity, and air generated by the air source assembly enters the seal cavity through the air outlet end, so that the technical problem that the existing power seal shaft seal must depend on an external power source and has large application limitation is solved, the optimization of a shaft seal structure is realized, the independence is good, and the application range is wide.

Description

Shaft seal and fan
Technical Field
The invention relates to the technical field of rotating shaft sealing, in particular to a shaft seal and a fan.
Background
Shaft seals are one of the components commonly used for fans or various rotating devices, and generally function to seal a gap between a rotating member (a rotating shaft) and a stationary member (a housing), so that a medium in the housing cannot leak to the outside through the gap between the rotating member and the stationary member; common shaft seal types are packing seals, mechanical seals and dynamic seals.
The existing mechanical seal is formed by adopting an aluminum alloy or polytetrafluoroethylene material between a shaft seal and a rotating shaft, and the filler seal is formed by arranging a rubber ring or an oil-immersed packing between the shaft seal and the rotating shaft, wherein a sealing medium such as gas or liquid is generally required to be stored in a sealing cavity formed between a power seal shaft seal and the rotating shaft, and the sealing structure has the advantages of reliable power sealing performance, low price, convenience in maintenance and wider application range.
However, the sealing cavity of the existing dynamic sealing shaft seal is required to be communicated with an external air source or a liquid source at any time so as to ensure the positive pressure environment in the sealing cavity, so that the structure of the shaft seal is complex, and the use cost of the shaft seal is increased by external additional equipment.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a shaft seal and a fan, so as to solve the technical problems that the existing power seal shaft seal is required to depend on an external power source and has large application limitation.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the shaft seal provided by the invention comprises a seal shell, a seal assembly and a gas source assembly;
the sealing shell is sleeved on the fan main shaft, one side of the sealing shell is connected with the outer wall of the fan shell, the sealing component is clamped between the sealing shell and the fan main shaft and is connected with the sealing shell, one end of the sealing component, which is far away from the sealing shell, is abutted against the fan main shaft, and a sealing cavity is formed among the sealing shell, the sealing component and the fan main shaft in a surrounding manner;
the air source assembly is connected with the sealing shell through the adjusting bracket, the air outlet end of the air source assembly is communicated with the sealing cavity, and the air source assembly is in transmission connection with the fan main shaft, so that the air source assembly generates air and enters the sealing cavity through the air outlet end, a high-pressure environment is formed in the sealing cavity, and the air in the fan shell is prevented from leaking out along the fan main shaft.
Further, the seal housing includes a first seal housing and a second seal housing;
one side of the first sealing shell and one side of the second sealing shell are connected with the outer wall of the fan shell, the fan main shaft is clamped between the first sealing shell and the second sealing shell, the first sealing shell is connected with the second sealing shell through a connecting component, a sealing component is arranged between the first sealing shell and the second sealing shell and between the second sealing shell and the fan main shaft, and a sealing cavity is formed by enclosing the first sealing shell, the second sealing shell, the sealing component and the fan main shaft;
the air source assembly is connected with the outer surface of the first sealing shell through the adjusting bracket.
Further, the first sealing shell comprises a connecting end and a fixed end;
the air source assembly is connected with the connecting end through the adjusting bracket, the sealing assembly is arranged between the connecting end and the fixing end and the fan main shaft, a sealing cavity is formed between the connecting end, the fixing end, the fan main shaft and the sealing assembly in a surrounding mode, and an air outlet end of the air source assembly penetrates through the fixing end and is communicated with the sealing cavity.
Further, the seal assembly includes a first seal portion and a second seal portion;
the first sealing part is clamped between the connecting end and the fan main shaft and connected with the connecting end, and the first sealing part is abutted with the fan main shaft so as to seal the connecting end and the fan main shaft;
the second sealing part is clamped between the fixed end and the fan main shaft and connected with the fixed end, and the second sealing part is abutted with the fan main shaft so as to seal the space between the fixed end and the fan main shaft.
Further, the air source assembly comprises a driving wheel and an air outlet device;
the air outlet device is fixed on the connecting end through the adjusting bracket, the air outlet end of the air outlet device passes through the fixed end and is communicated with the sealing cavity, the driving wheel is coaxially connected with the air outlet device, and the driving wheel is matched with the main shaft of the fan, so that the main shaft of the fan drives the air outlet device to generate an air source through the driving wheel.
Further, the air outlet device comprises an air outlet shell, a rotating wheel and an air guide pipe;
the air outlet shell is fixed on the connecting end through the adjusting bracket, an accommodating cavity is formed in the air outlet shell, the rotating wheel is arranged in the accommodating cavity and is connected with the inner wall of the air outlet shell through the connecting shaft, and the driving wheel is coaxially connected with the rotating wheel so as to drive the rotating wheel to rotate, so that high-pressure gas is generated in the accommodating cavity;
the air guide pipe is arranged on the air outlet shell and is communicated with the accommodating cavity, and one end, far away from the air outlet shell, of the air guide pipe penetrates through the fixed end and is communicated with the sealing cavity so as to transmit high-pressure gas in the accommodating cavity into the sealing cavity.
Further, the adjusting bracket comprises a first connecting part, a second connecting part and a connecting piece;
the first connecting portion is connected with one side of the connecting end, which is close to the fixed end, the second connecting portion is connected with the air outlet device, one end of the second connecting portion, which is far away from the air outlet device, stretches into the first connecting portion, the second connecting portion can slide along the first connecting portion to adjust the distance between the driving wheel and the fan main shaft, and the connecting piece passes through the first connecting portion to be abutted with the second connecting portion, so that the second connecting portion is fixed in the first connecting portion to fix the air outlet device on the connecting end.
Further, the first sealing portion and the second sealing portion are provided as a packing seal and a mechanical seal, respectively.
Further, the rotating wheel of the air outlet device is set to be a radial impeller.
The fan provided by the invention comprises a shaft seal.
By combining the technical scheme, the invention has the beneficial effects that:
the shaft seal provided by the invention comprises a seal shell, a seal assembly and a gas source assembly; the sealing shell is sleeved on the fan main shaft, one side of the sealing shell is connected with the outer wall of the fan shell, the sealing component is clamped between the sealing shell and the fan main shaft and is connected with the sealing shell, one end of the sealing component, which is far away from the sealing shell, is abutted against the fan main shaft, and a sealing cavity is formed among the sealing shell, the sealing component and the fan main shaft in a surrounding manner; the air source assembly is connected with the sealing shell through the adjusting bracket, the air outlet end of the air source assembly is communicated with the sealing cavity, and the air source assembly is in transmission connection with the fan main shaft, so that the air source assembly generates air and enters the sealing cavity through the air outlet end to form a high-pressure environment in the sealing cavity, and the air in the fan shell is prevented from leaking out along the fan main shaft; the fan main shaft is sleeved with the sealing shell, one side of the sealing shell is connected with the outer wall of the fan main shaft, the sealing assembly is clamped between the sealing shell and the fan main shaft and connected with the sealing shell, one end of the sealing assembly, which is far away from the sealing shell, is abutted against the fan main shaft, the air source assembly is connected with the sealing shell through the adjusting bracket, the air outlet end of the air source assembly is communicated with the sealing cavity, and air generated by the air source assembly enters the sealing cavity through the air outlet end, so that the technical problem that the existing power sealing shaft seal must rely on an external power source and has large application limitation is solved, the optimization of a shaft structure is realized, the independence is good, and the application range is wide.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
For a clearer description of embodiments of the invention or of solutions in the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a shaft seal according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a shaft seal provided in an embodiment of the present invention;
fig. 3 is a schematic view of a shaft seal according to an embodiment of the present invention.
Icon: 100-sealing the shell; 110-a first sealed housing; a 111-connection terminal; 112-a fixed end; 120-a second sealed housing; 200-a seal assembly; 210-a first seal; 220-a second seal; 230-sealing the cavity; 300-an air source assembly; 310-a driving wheel; 320-an air outlet device; 321-an air outlet shell; 322-rotating wheels; 323-wind guide pipe; 400-adjusting the bracket; 410-a first connection; 420-a second connection; 430-a connector; 500-fan housing; 510-fan spindle.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that unless explicitly specified and limited otherwise, terms such as "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
FIG. 1 is a schematic view of the overall structure of a shaft seal according to the present embodiment; FIG. 2 is a cross-sectional view of the shaft seal provided in this embodiment; fig. 3 is a schematic structural diagram of the shaft seal according to the present embodiment at a first view angle, wherein the first view angle is a front view of the air outlet device 320.
As shown in fig. 1-3, the present embodiment provides a shaft seal comprising a seal housing 100, a seal assembly 200, and a gas source assembly 300; the sealing shell 100 is sleeved on the fan main shaft 510, one side of the sealing shell 100 is connected with the outer wall of the fan shell 500, the sealing assembly 200 is clamped between the sealing shell 100 and the fan main shaft 510, the sealing assembly 200 is connected with the sealing shell 100, one end, away from the sealing shell 100, of the sealing assembly 200 is abutted against the fan main shaft 510, and a sealing cavity 230 is formed between the sealing shell 100, the sealing assembly 200 and the fan main shaft 510 in a surrounding manner; the air source assembly 300 is connected with the seal housing 100 through the adjusting bracket 400, the air outlet end of the air source assembly 300 is communicated with the seal cavity 230, and the air source assembly 300 is in transmission connection with the fan main shaft 510, so that the air source assembly 300 generates air and enters the seal cavity 230 through the air outlet end, so that a high-pressure environment is formed in the seal cavity 230, and the air in the fan housing 500 is prevented from being discharged along the fan main shaft 510.
Specifically, the seal housing 100 is provided with a through shaft hole, and the seal housing 100 is sleeved on the fan main shaft 510 through the through shaft hole; the outer wall of the fan housing 500 is welded with a plurality of studs, one side of the seal housing 100 is correspondingly provided with a plurality of stud holes, a plurality of groups of rubber sealing rings are arranged between the seal housing 100 and the outer wall of the fan housing 500, and the plurality of studs correspondingly penetrate through the plurality of stud holes and are fixed through bolts so as to realize sealing between the fan housing 500 and the seal housing 100; the sealing assembly 200 is clamped between the sealing shell 100 and the fan main shaft 510, one end of the sealing assembly 200 is connected with the sealing shell 100, one end of the sealing assembly 200, which is far away from the sealing shell 100, is abutted against the fan main shaft 510, and a sealing cavity 230 is formed between the sealing shell 100, the sealing assembly 200 and the fan main shaft 510 in a surrounding manner; the air source assembly 300 is fixed on the outer wall of the sealed housing 100 through the adjusting bracket 400, the air outlet end of the air source assembly 300 is communicated with the sealed cavity 230, the air source assembly 300 is in transmission connection with the fan main shaft 510, and the fan main shaft 510 can drive relevant components in the air source assembly 300 to rotate so as to form a high-pressure environment in the sealed cavity 230, so that gas in the fan housing 500 is prevented from being discharged from the matched position of the fan main shaft 510 and the fan housing 500.
The shaft seal provided by the embodiment comprises a seal shell 100, a seal assembly 200 and a gas source assembly 300; the sealing shell 100 is sleeved on the fan main shaft 510, one side of the sealing shell 100 is connected with the outer wall of the fan shell 500, the sealing assembly 200 is clamped between the sealing shell 100 and the fan main shaft 510, the sealing assembly 200 is connected with the sealing shell 100, one end, away from the sealing shell 100, of the sealing assembly 200 is abutted against the fan main shaft 510, and a sealing cavity 230 is formed between the sealing shell 100, the sealing assembly 200 and the fan main shaft 510 in a surrounding manner; the air source assembly 300 is connected with the sealed housing 100 through the adjusting bracket 400, the air outlet end of the air source assembly 300 is communicated with the sealed cavity 230, and the air source assembly 300 is in transmission connection with the fan main shaft 510, so that the air source assembly 300 generates air and enters the sealed cavity 230 through the air outlet end to form a high-pressure environment in the sealed cavity 230, and the air in the fan housing 500 is prevented from leaking out along the fan main shaft 510; the fan main shaft 510 is sleeved with the sealing shell 100, one side of the sealing shell 100 is connected with the outer wall of the fan shell 500, the sealing assembly 200 is clamped between the sealing shell 100 and the fan main shaft 510, the sealing assembly 200 is connected with the sealing shell 100, one end of the sealing assembly 200, which is far away from the sealing shell 100, is abutted against the fan main shaft 510, the air source assembly 300 is connected with the sealing shell 100 through the adjusting bracket 400, the air outlet end of the air source assembly 300 is communicated with the sealing cavity 230, and the air generated by the air source assembly 300 enters the sealing cavity 230 through the air outlet end, so that the technical problem that the existing power sealing shaft seal must rely on an external power source and has large application limitation is solved, the optimization of the sealing structure is realized, the independence is good, and the application range is wide.
Further, the seal housing 100 in the shaft seal provided in this embodiment includes the first seal housing 110 and the second seal housing 120; one side of the first sealing shell 110 and one side of the second sealing shell 120 are connected with the outer wall of the fan shell 500, the fan main shaft 510 is clamped between the first sealing shell 110 and the second sealing shell 120, the first sealing shell 110 is connected with the second sealing shell 120 through a connecting component, a sealing component 200 is arranged between the first sealing shell 110 and the second sealing shell 120 and between the first sealing shell 120 and the fan main shaft 510, and a sealing cavity 230 is formed between the first sealing shell 110, the second sealing shell 120, the sealing component 200 and the fan main shaft 510 in a surrounding manner; air source assembly 300 is coupled to the outer surface of first seal housing 110 by adjustment bracket 400.
Specifically, the seal housing 100 is configured as a split type combined structure, and includes a first seal housing 110 and a second seal housing 120, the air source assembly 300 is connected to the outer surface of the first seal housing 110 through an adjusting bracket 400, and the first seal housing 110 and the second seal housing 120 cooperate to form the seal housing 100; the same sides of the first sealing shell 110 and the second sealing shell 120 are connected with the outer wall of the fan shell 500, semi-cylindrical shaft holes are formed in the matching surfaces of the first sealing shell 110 and the second sealing shell 120, a main shaft of the fan is clamped in a cylindrical shaft hole formed by the first sealing shell 110 and the second sealing shell 120 in a matched mode, the first sealing shell 110 is connected with the second sealing shell 120 through a connecting component, in the alternative scheme of the embodiment, preferably, the connecting component is a flange surface and a bolt, and the combining surface of the first sealing shell 110 and the second sealing shell 120 is a flange surface and is fixed into a whole through the bolt; seal assemblies 200 are arranged between the first seal housing 110 and the second seal housing 120 and the fan main shaft 510, the seal assemblies 200 are respectively connected with one ends of the first seal housing 110 and the second seal housing 120, which are close to the fan main shaft 510, and a seal cavity 230 is formed between the first seal housing 110, the second seal housing 120, the seal assemblies 200 and the fan main shaft 510.
Further, the first sealing case 110 includes a connection end 111 and a fixed end 112; the connecting end 111 and the fixed end 112 are both arranged along the outer circumferential direction of the fan main shaft 510, one side of the connecting end 111 is connected with the outer wall of the fan housing, the fixed end 112 is connected with one side of the connecting end 111 away from the fan housing, the air source assembly 300 is connected with the connecting end 111 through the adjusting bracket 400, the sealing assembly 200 is arranged between the connecting end 111 and the fixed end 112 and the fan main shaft 510, a sealing cavity 230 is arranged between the connecting end 111, the fixed end 112, the fan main shaft 510 and the sealing assembly 200 in a surrounding manner, and the air outlet end of the air source assembly 300 penetrates through the fixed end 112 and is communicated with the sealing cavity 230.
Specifically, the first seal housing 110 includes a connection end 111 and a fixed end 112, and equivalently, the second seal housing 120 has the same structure as the first seal housing 110, and the second seal housing 120 also includes a connection end 111 and a fixed end 112, and this embodiment takes the structure of the first seal housing 110 as an example for illustration; the connecting end 111 and the fixed end 112 are all arranged along the outer circumferential direction of the fan main shaft 510, the connecting end 111 and the fixed end 112 are integrally formed, one side of the connecting end 111 is connected with the outer wall of the fan shell, the fixed end 112 is connected with one side of the connecting end 111 far away from the fan shell, the air source assembly 300 is connected with the outer wall of the connecting end 111 through the adjusting bracket 400, a sealing cavity 230 is enclosed between the connecting end 111, the fixed end 112, the fan main shaft 510 and the sealing assembly 200, an opening is arranged on the fixed end 112, and the air outlet end of the air source assembly 300 penetrates through the opening and is communicated with the sealing cavity 230.
Further, the seal assembly 200 includes a first seal 210 and a second seal 220; the first sealing part 210 is clamped between the connecting end 111 and the fan main shaft 510, the first sealing part 210 is connected with the connecting end 111, and the first sealing part 210 is abutted against the fan main shaft 510 so as to seal the connecting end 111 and the fan main shaft 510; the second sealing part 220 is clamped between the fixed end 112 and the fan main shaft 510, the second sealing part 220 is connected with the fixed end 112, and the second sealing part 220 is abutted against the fan main shaft 510 so as to seal the space between the fixed end 112 and the fan main shaft 510; wherein the first sealing portion 210 and the second sealing portion 220 are provided as a packing seal and a mechanical seal, respectively.
Specifically, the seal assembly 200 includes a first seal portion 210 and a second seal portion 220, where the first seal portion 210 is set to be a packing seal, preferably, the packing seal is set to be a rubber seal ring or an oil-immersed asbestos packing, the first seal portion 210 is clamped between the connection end 111 and the fan main shaft 510, an annular groove is formed on a circumferential surface of the connection end 111 matched with the fan rotating shaft, the first seal portion 210 is embedded into the annular groove, the depth of the annular groove is smaller than the diameter of the cross section of the first seal portion 210, and one side of the first seal portion 210 away from the connection end 111 is abutted against the outer surface of the fan main shaft 510 to realize sealing between the first seal portion 210 and the fan main shaft 510; the second sealing portion 220 is clamped between the fixed end 112 and the fan main shaft 510, the second sealing portion 220 is configured as a mechanical seal, in an alternative scheme of this embodiment, preferably, the second sealing portion 220 is configured as an aluminum alloy or polytetrafluoroethylene sealing block, the second sealing portion 220 is clamped between the fixed end 112 and the fan main shaft 510, one end of the second sealing portion 220 is inlaid into the fixed end 112, and one side of the second sealing portion 220 away from the fixed end 112 is abutted with the fan main shaft 510 so as to realize sealing between the fixed end 112 and the fan main shaft 510, so that a sealed cavity is enclosed among the connecting end 111, the fixed end 112, the second sealing portion 220, the fan main shaft 510 and the first sealing portion 210.
The shaft seal provided in this embodiment is clamped between the first seal housing 110 and the second seal housing 120 through the fan main shaft 510, the connection end 111 and the fixed end 112 are all arranged along the outer circumferential direction of the fan main shaft 510, the first seal portion 210 is clamped between the connection end 111 and the fan main shaft 510, the first seal portion 210 is connected with the connection end 111, the second seal portion 220 is clamped between the fixed end 112 and the fan main shaft 510, the second seal portion 220 is connected with the fixed end 112, one sides, far away from the seal housing 100, of the first seal portion 210 and the second seal portion 220 are all abutted against the outer surface of the fan main shaft 510, and a sealed cavity is effectively formed between the connection end 111, the fixed end 112, the second seal portion 220, the fan main shaft 510 and the first seal portion 210 in a surrounding manner.
On the basis of the above embodiment, further, the air source assembly 300 in the shaft seal provided in this embodiment includes a driving wheel 310 and an air outlet device 320; the air outlet device 320 is fixed on the connecting end 111 through the adjusting bracket 400, the air outlet end of the air outlet device 320 passes through the fixed end 112 to be communicated with the sealing cavity 230, the driving wheel 310 is coaxially connected with the air outlet device 320, and the driving wheel 310 is matched with the fan main shaft 510, so that the fan main shaft 510 drives the air outlet device 320 to generate an air source through the driving wheel 310.
The air outlet device 320 comprises an air outlet shell 321, a rotating wheel 322 and an air guide pipe 323; the air outlet shell 321 is fixed on the connecting end 111 through the adjusting bracket 400, a containing cavity is arranged in the air outlet shell 321, the rotating wheel 322 is arranged in the containing cavity, the rotating wheel 322 is connected with the inner wall of the air outlet shell 321 through a connecting shaft, and the driving wheel 310 is coaxially connected with the rotating wheel 322 so as to drive the rotating wheel 322 to rotate, so that high-pressure gas is generated in the containing cavity; the air guide pipe 323 is arranged on the air outlet shell 321, and the air guide pipe 323 is communicated with the accommodating cavity, and one end of the air guide pipe 323, which is far away from the air outlet shell 321, passes through the fixed end 112 and is communicated with the sealing cavity 230 so as to transmit high-pressure gas in the accommodating cavity into the sealing cavity 230; wherein the rotating wheel 322 of the air outlet device 320 is configured as a radial impeller.
Specifically, the air source assembly 300 includes a driving wheel 310 and an air outlet device 320, and the air outlet device 320 includes an air outlet casing 321, a rotating wheel 322 and an air guide pipe 323; the air outlet shell 321 is fixed on the outer wall of the connecting end 111 through the adjusting bracket 400, an accommodating cavity is formed in the air outlet shell 321, a rotating shaft is arranged in the accommodating cavity, two ends of the rotating shaft are connected with the inner wall of the air outlet shell 321, the rotating wheel 322 is fixed on the rotating shaft through a deep groove ball bearing, the driving wheel 310 is arranged on one side of the air outlet shell 321, the driving wheel 310 is coaxially connected with the rotating shaft in the air outlet shell 321, the driving wheel 310 is meshed with the fan main shaft 510, preferably, meshing surfaces of the driving wheel 310 and the fan main shaft 510 are provided with meshing teeth, so that the fan main shaft 510 drives the rotating wheel 322 in the air outlet shell 321 to rotate through the driving wheel 310 to generate a high-pressure air source in the accommodating cavity, and in addition, the impeller of the rotating wheel 322 is set to be a radial impeller, so that equal amount of high-pressure air can be generated in the forward and backward rotation process of the rotating wheel 322; the air guide pipe 323 is disposed on the outer wall of the air outlet casing 321, and the air guide pipe 323 is communicated with the accommodating cavity in the air outlet casing 321, in an alternative scheme of this embodiment, preferably, the air guide pipe 323 is configured as a stainless steel corrugated hose, one end of the air guide pipe 323 far away from the air outlet casing 321 is provided with an external thread, and the external thread can be matched with an internal threaded hole formed in the fixed end 112, so that high-pressure gas in the accommodating cavity is transmitted into the sealing cavity 230 of the sealing casing 100 through the air guide pipe 323.
Further, the adjusting bracket 400 in the shaft seal provided in the present embodiment includes a first connecting portion 410, a second connecting portion 420 and a connecting member 430; the first connecting portion 410 is connected with one side of the connecting end 111, which is close to the fixed end 112, the second connecting portion 420 is connected with the air outlet device 320, one end, away from the air outlet device 320, of the second connecting portion 420 extends into the first connecting portion 410, the second connecting portion 420 can slide along the first connecting portion 410 to adjust the distance between the driving wheel 310 and the fan main shaft 510, and the connecting piece 430 passes through the first connecting portion 410 to abut against the second connecting portion 420, so that the second connecting portion 420 is fixed in the first connecting portion 410, and the air outlet device 320 is fixed on the connecting end 111.
Specifically, the adjustment bracket 400 includes a first connection part 410, and a connection member 430; the first connecting part 410 is welded on one side of the connecting end 111, which is close to the fixed end 112, the second connecting part 420 is fixed on one side of the air outlet shell 321 of the air outlet device 320, which is far away from the driving wheel 310, a chute is enclosed between the first connecting part 410 and the connecting end 111, one end of the second connecting part 420, which is far away from the air outlet shell 321, can extend into the chute, and the second connecting part 420 can move in the chute along the direction perpendicular to the axis of the fan main shaft 510 so as to adjust the distance between the driving wheel 310 and the fan main shaft 510, so as to adapt to the fan main shafts 510 with different shaft diameters; the connecting piece 430 is configured as a bolt, the first connecting portion 410 is provided with a plurality of bolt holes, the plurality of bolts are correspondingly screwed into the plurality of bolt holes, and the screwed-out end of the bolt is abutted with one end, away from the air outlet casing 321, of the second connecting portion 420, so that the first connecting portion 410 is pressed against the outer wall of the connecting end 111, and the air outlet device 320 is fixed on the connecting end 111.
The shaft seal provided by the embodiment is fixed on the outer wall of the connecting end 111 through the air outlet shell 321, the rotating wheel 322 is arranged on the rotating shaft in the air outlet shell 321, the driving wheel 310 is coaxially connected with the rotating wheel 322, and the air guide pipe 323 communicates the accommodating cavity in the air outlet shell 321 with the sealing cavity 230 in the sealing shell 100, so that the shaft seal provided by the embodiment does not depend on an external air source, and has the advantages of good energy conservation and wide application range; the first connecting portion 410 is connected with one side of the connecting end 111 near the fixed end 112, the second connecting portion 420 is connected with the air outlet device 320, and the second connecting portion 420 can slide along the first connecting portion 410, so that the distance between the driving wheel 310 and the fan main shaft 510 can be conveniently adjusted, and the fan main shaft 510 with different shaft diameters can be adapted.
On the basis of the above embodiment, further, the fan provided in this embodiment includes a shaft seal.
Because the technical effect of the fan provided in this embodiment is the same as that of the shaft seal provided above, the description thereof will not be repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (7)

1. A shaft seal, comprising: a seal housing, a seal assembly, and a gas source assembly;
the sealing component is clamped between the sealing shell and the fan spindle, and is connected with the sealing shell, one end of the sealing component, which is far away from the sealing shell, is abutted with the fan spindle, and a sealing cavity is formed between the sealing shell and the fan spindle in a surrounding manner;
the air source assembly is connected with the sealing shell through the adjusting bracket, the air outlet end of the air source assembly is communicated with the sealing cavity, and the air source assembly is in transmission connection with the fan main shaft, so that the air source assembly generates air and enters the sealing cavity through the air outlet end to form a high-pressure environment in the sealing cavity, and the air in the fan shell is prevented from being discharged along the fan main shaft;
the seal housing comprises a first seal housing and a second seal housing;
one side of the first sealing shell and one side of the second sealing shell are connected with the outer wall of the fan shell, the fan main shaft is clamped between the first sealing shell and the second sealing shell, the first sealing shell is connected with the second sealing shell through a connecting component, the sealing component is arranged between the first sealing shell and the second sealing shell and between the second sealing shell and the fan main shaft, and a sealing cavity is formed by enclosing the first sealing shell, the second sealing shell, the sealing component and the fan main shaft;
the air source assembly is connected with the outer surface of the first sealing shell through the adjusting bracket;
the first sealing shell comprises a connecting end and a fixed end;
the connecting end and the fixed end are arranged along the outer circumferential direction of the fan main shaft, one side of the connecting end is connected with the outer wall of the fan shell, the fixed end is connected with one side of the connecting end away from the fan shell, the air source component is connected with the connecting end through the adjusting bracket, the sealing component is arranged between the connecting end and the fixed end and the fan main shaft, the sealing cavity is formed by surrounding the connecting end, the fixed end, the fan main shaft and the sealing component, and the air outlet end of the air source component penetrates through the fixed end and is communicated with the sealing cavity;
the air source assembly comprises a driving wheel and an air outlet device;
the air outlet device is fixed on the connecting end through the adjusting bracket, the air outlet end of the air outlet device penetrates through the fixed end to be communicated with the sealing cavity, the driving wheel is coaxially connected with the air outlet device, and the driving wheel is matched with the fan main shaft, so that the fan main shaft drives the air outlet device to generate an air source through the driving wheel.
2. The shaft seal of claim 1 wherein said seal assembly includes a first seal and a second seal;
the first sealing part is clamped between the connecting end and the fan main shaft and is connected with the connecting end, and the first sealing part is abutted with the fan main shaft so as to seal the connecting end and the fan main shaft;
the second sealing part is clamped between the fixed end and the fan main shaft and is connected with the fixed end, and the second sealing part is abutted to the fan main shaft so as to seal the fixed end and the fan main shaft.
3. The shaft seal of claim 1 wherein said air outlet means comprises an air outlet housing, a rotating wheel and an air guide tube;
the air outlet shell is fixed on the connecting end through the adjusting bracket, a containing cavity is arranged in the air outlet shell, the rotating wheel is arranged in the containing cavity and is connected with the inner wall of the air outlet shell through a connecting shaft, and the driving wheel is coaxially connected with the rotating wheel so as to drive the rotating wheel to rotate, so that high-pressure gas is generated in the containing cavity;
the air guide pipe is arranged on the air outlet shell and is communicated with the accommodating cavity, and one end, far away from the air outlet shell, of the air guide pipe penetrates through the fixed end and is communicated with the sealing cavity so as to transmit high-pressure gas in the accommodating cavity into the sealing cavity.
4. The shaft seal of claim 1 wherein said adjustment bracket includes a first connection, a second connection and a connection;
the first connecting portion with the link is close to one side of stiff end is connected, the second connecting portion with air-out device is connected, the second connecting portion keep away from air-out device's one end stretches into in the first connecting portion, just the second connecting portion can follow first connecting portion slides, in order to adjust the drive wheel with distance between the fan main shaft, the connecting piece passes first connecting portion with second connecting portion butt, so that the second connecting portion is fixed in the first connecting portion, in order to fix air-out device on the link.
5. The shaft seal of claim 2 wherein said first seal portion and said second seal portion are provided as a packing seal and a mechanical seal, respectively.
6. A shaft seal according to claim 3, wherein the rotating wheel of the air outlet means is provided as a radial impeller.
7. A fan comprising a shaft seal according to any one of claims 1-6.
CN201811501400.5A 2018-12-10 2018-12-10 Shaft seal and fan Active CN109356880B (en)

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Application Number Priority Date Filing Date Title
CN201811501400.5A CN109356880B (en) 2018-12-10 2018-12-10 Shaft seal and fan

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Application Number Priority Date Filing Date Title
CN201811501400.5A CN109356880B (en) 2018-12-10 2018-12-10 Shaft seal and fan

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CN109356880A CN109356880A (en) 2019-02-19
CN109356880B true CN109356880B (en) 2024-04-02

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203161301U (en) * 2013-03-18 2013-08-28 玉锋实业集团有限公司 Wheel axle sealing device for steam turbine
CN105351245A (en) * 2015-12-04 2016-02-24 天津市天鼓机械制造有限公司 Mechanical sealing medium supplying control device for roots blower
CN105604963A (en) * 2015-12-24 2016-05-25 江苏金通灵流体机械科技股份有限公司 Coal gas pressurizing machine
CN205304454U (en) * 2015-12-02 2016-06-08 中国长江动力集团有限公司 Novel turbine electricity generation atmoseal device
CN209212644U (en) * 2018-12-10 2019-08-06 济南风机厂有限责任公司 Axle envelope and blower

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203161301U (en) * 2013-03-18 2013-08-28 玉锋实业集团有限公司 Wheel axle sealing device for steam turbine
CN205304454U (en) * 2015-12-02 2016-06-08 中国长江动力集团有限公司 Novel turbine electricity generation atmoseal device
CN105351245A (en) * 2015-12-04 2016-02-24 天津市天鼓机械制造有限公司 Mechanical sealing medium supplying control device for roots blower
CN105604963A (en) * 2015-12-24 2016-05-25 江苏金通灵流体机械科技股份有限公司 Coal gas pressurizing machine
CN209212644U (en) * 2018-12-10 2019-08-06 济南风机厂有限责任公司 Axle envelope and blower

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