CN214366870U - Fan shaft sealing device of centrifugal fan - Google Patents
Fan shaft sealing device of centrifugal fan Download PDFInfo
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- CN214366870U CN214366870U CN202120318535.9U CN202120318535U CN214366870U CN 214366870 U CN214366870 U CN 214366870U CN 202120318535 U CN202120318535 U CN 202120318535U CN 214366870 U CN214366870 U CN 214366870U
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Abstract
The utility model relates to a centrifugal fan technical field is a centrifugal fan's fan shaft sealing device, it includes the axle sleeve, preceding semi-ring casing and latter half ring casing, the axle sleeve is installed in preceding semi-ring casing and the internal rotation of latter half ring casing, latter half ring casing is equipped with back gas groove, install semi-annular after first back installation semi-annular and the second, be equipped with first preceding installation semi-annular on the preceding semi-ring casing, install semi-annular and preceding gas groove before the second, first preceding installation semi-annular and first back installation semi-annular make up and form first installation annular, installation semi-annular makes up and forms second installation annular after installation semi-annular and the second before the second, be equipped with three lamella formula graphite sealing rings in first installation annular and the second installation annular, be equipped with the sealing washer in the axle sleeve, be equipped with the installation screw on the latter half ring casing. The utility model discloses a set up three lamella formula graphite sealing rings and let in compressed air formation malleation in preceding air pocket and the back air pocket in the axle sleeve outside, set up the sealing washer in the axle sleeve, and then can effectively avoid waste gas to leak outward.
Description
Technical Field
The utility model relates to a centrifugal fan technical field is a centrifugal fan's fan shaft seal device.
Background
The centrifugal fan is widely applied to ventilation facilities of factory and mining enterprises and large-scale public places such as medicine, chemical industry, textile chemical fiber, heating and ventilation, electric power, building materials, automobile coating and the like. When the common centrifugal fan conveys air media, the requirement on the sealing property of the shaft seal is not high; however, under the working condition of conveying hazardous and harmful gas media, certain strict requirements are imposed on the sealing performance of the shaft seal. The existing centrifugal fan generally comprises a motor, a fan shell and a wind wheel, wherein the wind wheel is rotatably arranged in the fan shell through a fan shaft, a motor shaft is rotatably connected with the fan shaft, but the fan shaft sealing structure of the existing centrifugal fan is unreliable, and the air pressure inside the fan shell is high, so that the waste gas inside the fan shell is easy to leak out from the space between the fan shaft and the fan shell, the field waste gas is diffused, and the health of workers is seriously damaged.
Disclosure of Invention
The utility model provides a centrifugal fan's fan axle sealing device has overcome above-mentioned prior art not enough, and it can effectively be solved current centrifugal fan and have that the leakproofness is not good between fan axle and the fan casing, leads to the problem that waste gas leaks outward.
The technical scheme of the utility model is realized through following measure: a fan shaft sealing device of a centrifugal fan comprises a shaft sleeve, a front semi-ring shell and a rear semi-ring shell, wherein the front semi-ring shell and the rear semi-ring shell are detachably and fixedly installed together, a mounting channel which is communicated from left to right is formed in the middle of the front semi-ring shell and the rear semi-ring shell, the shaft sleeve is rotatably installed in the mounting channel, a semi-annular rear gas groove with a forward opening is formed in the middle of the inner wall of the rear semi-ring shell, a first rear mounting semi-ring groove and a second rear mounting semi-ring groove which are communicated with the rear gas groove and have forward openings are respectively formed in the inner wall of the rear semi-ring shell corresponding to the left side and the right side of the rear gas groove, a rear mounting flange is arranged on the outer side of the right end of the rear semi-ring shell, a first front mounting semi-ring groove with a backward opening is formed in the front semi-ring shell corresponding to the position of the first rear mounting semi-ring groove, a second front mounting semi-ring groove with a backward opening is formed in the front semi-ring shell corresponding to the position of the second rear mounting semi-ring groove, the front half ring shell corresponding to the rear gas groove position is provided with a front gas groove with a backward opening, the front half ring shell corresponding to the rear half mounting flange position is provided with a front half mounting flange, a first front mounting half ring groove and a first rear mounting half ring groove are combined to form a first mounting ring groove, a second front mounting half ring groove and a second rear mounting half ring groove are combined to form a second mounting ring groove, the first mounting ring groove and the second mounting ring groove are internally provided with three-flap type graphite sealing rings capable of forming sealing fit with the outer side wall of the shaft sleeve, the left end and the right end of the inner wall of the shaft sleeve are respectively provided with a sealing ring capable of forming sealing with the fan shaft, and the rear half ring shell corresponding to the rear gas groove position is provided with a mounting screw hole communicated with the rear gas groove and used for mounting a gas pipe joint.
The following are further optimization or/and improvement of the technical scheme of the utility model:
the upper portion and the lower portion of the rear semi-ring shell corresponding to the left position of the first rear mounting semi-ring groove and the upper portion and the lower portion of the rear semi-ring shell corresponding to the right position of the second rear mounting semi-ring groove can be provided with bolt mounting counter bores, the front semi-ring shell corresponding to the bolt mounting counter bores is provided with connecting threaded holes, and the front semi-ring shell and the rear semi-ring shell are detachably and fixedly mounted together through connecting bolts penetrating through the bolt mounting counter bores and screwed in the connecting threaded holes.
But above-mentioned preceding half mounting flange along its circumferencial direction equipartition has three bolt mounting hole, and back half mounting flange has three bolt mounting hole along its circumferencial direction equipartition.
The utility model has the advantages of reasonable and compact structure, convenient to use, it forms the malleation through set up two three lamella formula graphite sealing rings in the axle sleeve outside and let in compressed air in preceding air duct and the back air duct, sets up two can form sealed sealing washer with the fan axle in the axle sleeve, and then can effectively avoid waste gas to leak outward, and guarantee staff's is healthy.
Drawings
Fig. 1 is a schematic sectional view of the preferred embodiment of the present invention.
Fig. 2 is a right-view structural diagram of the preferred embodiment of the present invention.
The codes in the figures are respectively: 1 is the axle sleeve, 2 is preceding semi-ring casing, 3 is back semi-ring casing, 4 is back gas groove, 5 is first back installation semi-ring groove, 6 is second back installation semi-ring groove, 7 is preceding semi-mounting flange, 8 is latter half mounting flange, 9 is three lamella formula graphite sealing ring, 10 is the installation screw, 11 is the bolt installation counter bore, 12 is connecting screw hole, 13 is connecting bolt, 14 is the bolt mounting hole, 15 is the sealing washer, 16 is the fan axle, 17 is the fan casing.
Detailed Description
The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.
In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention will be further described with reference to the following examples and drawings:
as shown in attached figures 1 and 2, the fan shaft sealing device of the centrifugal fan comprises a shaft sleeve 1, a front half ring shell 2 and a rear half ring shell 3, wherein the front half ring shell 2 and the rear half ring shell 3 are detachably and fixedly installed together, a left through installation channel and a right through installation channel are formed in the middle of the front half ring shell 2 and the rear half ring shell 3, the shaft sleeve 1 is rotatably installed in the installation channel, a semi-ring-shaped rear air groove 4 with a forward opening is formed in the middle of the inner wall of the rear half ring shell 3, a first rear installation semi-ring groove 5 and a second rear installation semi-ring groove 6 which are communicated with the rear air groove 4 and have a forward opening are respectively arranged on the inner wall of the rear half ring shell 3 corresponding to the left side and the right side of the rear air groove 4, a rear half installation flange 8 is arranged on the outer side of the right end of the rear half ring shell 3, a first front installation semi-ring groove with a backward opening is arranged on the front half ring shell 2 corresponding to the position of the first rear installation semi-ring groove 5, and a second front half ring groove 2 corresponding to the position of the second rear installation semi-ring groove 6 is provided with a backward opening The groove, be equipped with the preceding gas groove that the opening is backward on the preceding semi-ring casing 2 that corresponds 4 positions in back gas groove, be equipped with preceding semi-mounting flange 7 on the preceding semi-ring casing 2 that corresponds 8 positions in the back semi-mounting flange, first preceding installation semi-ring groove and the combination of first back installation semi-ring groove 5 form first installation annular, the combination of second preceding installation semi-ring groove and second back installation semi-ring groove 6 forms second installation annular, all be equipped with in first installation annular and the second installation annular and form sealed complex three lamella formula graphite sealing ring 9 with 1 outside wall of axle sleeve, both ends respectively are equipped with one and can form sealed sealing washer 15 with fan shaft 16 about 1 inner wall of axle sleeve, be equipped with the installation screw 10 that is used for installing the trachea joint with back gas groove 4 intercommunication on the back semi-ring casing 3 that corresponds 4 positions in back gas groove.
According to the requirement, the three-petal type graphite sealing ring 9 is a known technology, and can adopt M104K series products in Shanghai Motian, wherein the front half mounting flange 7 and the front half-ring shell 2 are arranged integrally, and the rear half mounting flange 8 and the rear half-ring shell 3 are arranged integrally; when the exhaust fan sealing ring is used, the fan shaft 16 is arranged in the shaft sleeve 1, the sealing ring 15 is in sealing fit with the fan shaft 16, the front half-ring shell 2 and the rear half-ring shell 3 are fixed on the fan shell 17 through the front half mounting flange 7 and the rear half mounting flange 8, sealing gaskets are arranged between the front half mounting flange 7 and the rear half mounting flange 8 and the fan shell 17, air pipe joints are arranged in the mounting screw holes 10 on the rear half-ring shell 3, compressed air is introduced into the rear air groove 4 and the front air groove, the air pressure in the rear air groove 4 and the front air groove is greater than the pressure of exhaust gas conveyed by the fan, the fan shaft 16 drives the shaft sleeve 1 to rotate, as the sealing ring 15 is in sealing fit with the fan shaft 16 and the three-flap type graphite sealing ring 9 is in sliding sealing fit with the shaft sleeve 1, the exhaust gas cannot leak out from the space between the fan shaft and the fan shell, and when the three-flap type graphite sealing ring 9 on the shaft sleeve 1 is worn and the sealing performance between the shaft sleeves is weakened, because the gas pressure in the back gas groove 4 and the front gas groove is greater than the pressure of the waste gas conveyed by the fan, the waste gas can not enter the front gas groove and the back gas groove, namely can not pass through the gap between the shaft sleeve 1 and the front semi-ring shell 2 and the back semi-ring shell 3, namely the waste gas can not leak out from the space between the fan shaft and the fan shell. The utility model has the advantages of reasonable and compact structure, convenient to use, it forms the malleation through set up two three-petal formula graphite seal ring 9 in the 1 outside of axle sleeve and let in compressed air in preceding air duct and back air duct 4, sets up two in axle sleeve 1 and can form sealed sealing washer 15 with fan axle 16, and then can effectively avoid waste gas to leak outward, ensures that the staff's is healthy.
The fan shaft sealing device of the centrifugal fan can be further optimized or/and improved according to actual requirements:
as shown in fig. 1 and 2, the upper portion and the lower portion of the rear half ring housing 3 corresponding to the left position of the first rear mounting half ring groove 5 and the upper portion and the lower portion of the rear half ring housing 3 corresponding to the right position of the second rear mounting half ring groove 6 are both provided with bolt mounting counter bores 11, the front half ring housing 2 corresponding to the bolt mounting counter bores 11 is provided with connecting threaded holes 12, and the front half ring housing 2 and the rear half ring housing 3 are detachably and fixedly mounted together through connecting bolts 13 penetrating through the bolt mounting counter bores 11 and screwed in the connecting threaded holes 12. Through set up bolt installation counter bore 11 on rear half ring casing 3, set up connecting thread hole 12 on preceding half ring casing 2, accessible connecting bolt 13 is quick can dismantle fixed mounting together with preceding half ring casing 2 and rear half ring casing 3.
As shown in attached figures 1 and 2, three bolt mounting holes 14 are uniformly distributed on the front half mounting flange 7 in the circumferential direction, and three bolt mounting holes 14 are uniformly distributed on the rear half mounting flange 8 in the circumferential direction. According to the requirements, threaded holes which correspond to the bolt mounting holes 14 in the front half mounting flange 7 and the rear half mounting flange 8 one by one are formed in the fan shell, and the front half mounting flange 7 and the rear half mounting flange 8 are fixedly mounted on the fan shell through bolts which penetrate through the bolt mounting holes 14 and are screwed in the threaded holes.
Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.
Claims (3)
1. A fan shaft sealing device of a centrifugal fan is characterized by comprising a shaft sleeve, a front semi-ring shell and a rear semi-ring shell, wherein the front semi-ring shell and the rear semi-ring shell are detachably and fixedly installed together, a left-right through installation channel is formed in the middle of the front semi-ring shell and the rear semi-ring shell, the shaft sleeve is rotatably installed in the installation channel, a semi-annular rear air groove with a forward opening is formed in the middle of the inner wall of the rear semi-ring shell, a first rear installation semi-ring groove and a second rear installation semi-ring groove which are communicated with the rear air groove and have forward openings are respectively formed in the inner wall of the rear semi-ring shell corresponding to the left side and the right side of the rear air groove, a rear installation semi-ring flange is arranged on the outer side of the right end of the rear semi-ring shell corresponding to the position of the first rear installation semi-ring groove, a first front installation semi-ring groove with a rearward opening is formed in the front semi-ring shell corresponding to the position of the second rear installation semi-ring groove, the front half ring shell corresponding to the rear gas groove position is provided with a front gas groove with a backward opening, the front half ring shell corresponding to the rear half mounting flange position is provided with a front half mounting flange, a first front mounting half ring groove and a first rear mounting half ring groove are combined to form a first mounting ring groove, a second front mounting half ring groove and a second rear mounting half ring groove are combined to form a second mounting ring groove, the first mounting ring groove and the second mounting ring groove are internally provided with three-flap type graphite sealing rings capable of forming sealing fit with the outer side wall of the shaft sleeve, the left end and the right end of the inner wall of the shaft sleeve are respectively provided with a sealing ring capable of forming sealing with the fan shaft, and the rear half ring shell corresponding to the rear gas groove position is provided with a mounting screw hole communicated with the rear gas groove and used for mounting a gas pipe joint.
2. The fan shaft sealing device for the centrifugal fan according to claim 1, wherein the upper portion and the lower portion of the rear half ring housing corresponding to the left position of the first rear mounting half ring groove and the upper portion and the lower portion of the rear half ring housing corresponding to the right position of the second rear mounting half ring groove are both provided with bolt mounting counter bores, the front half ring housing corresponding to the bolt mounting counter bores is provided with connection screw holes, and the front half ring housing and the rear half ring housing are detachably and fixedly mounted together by means of connection bolts penetrating through the bolt mounting counter bores and screwed into the connection screw holes.
3. The fan shaft sealing device of the centrifugal fan as claimed in claim 1, wherein the front half mounting flange has three bolt mounting holes uniformly distributed along a circumferential direction thereof, and the rear half mounting flange has three bolt mounting holes uniformly distributed along a circumferential direction thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120318535.9U CN214366870U (en) | 2021-02-04 | 2021-02-04 | Fan shaft sealing device of centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120318535.9U CN214366870U (en) | 2021-02-04 | 2021-02-04 | Fan shaft sealing device of centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214366870U true CN214366870U (en) | 2021-10-08 |
Family
ID=77963016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120318535.9U Active CN214366870U (en) | 2021-02-04 | 2021-02-04 | Fan shaft sealing device of centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214366870U (en) |
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2021
- 2021-02-04 CN CN202120318535.9U patent/CN214366870U/en active Active
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