CN210265251U - Sealing device of waste gas conveying fan - Google Patents
Sealing device of waste gas conveying fan Download PDFInfo
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- CN210265251U CN210265251U CN201921182021.4U CN201921182021U CN210265251U CN 210265251 U CN210265251 U CN 210265251U CN 201921182021 U CN201921182021 U CN 201921182021U CN 210265251 U CN210265251 U CN 210265251U
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- fan
- seal body
- shaft seal
- main shaft
- air outlet
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Abstract
A sealing device of a waste gas conveying fan comprises a shaft seal body sleeved on a fan main shaft, a flexible connecting ring is further sleeved on the fan main shaft, two ends of the flexible connecting ring are respectively connected with the shaft seal body and the outer wall of a fan shell, one end of the shaft seal body, far away from the flexible connecting ring, is connected with a bearing seat, a circle of annular groove is formed in the inner wall of the shaft seal body, two ends of the annular groove are respectively sleeved with a filler ring, an annular oil cavity is formed by matching the inner wall of the ring groove and the outer wall of the fan main shaft, two ends of the oil cavity are sealed by two packing rings, an oil inlet hole communicated with the oil cavity is formed in the side wall of the upper half part of the shaft seal body, an air outlet hole is formed in the side wall of the lower half part of the shaft seal body, the air outlet hole is positioned at one side of the oil cavity close to the fan shell, a return pipe is connected to the air outlet hole, one end of the return pipe, far away from the air outlet hole, is connected to the, so that the gas leaked from the gap between the fan shell and the main shaft of the fan to the shaft seal body flows back into the fan shell.
Description
Technical Field
The utility model relates to a fan field sealing device especially relates to a sealing device of waste gas conveying fan.
Background
The fan relies on the mechanical energy of motor input, improve gas pressure and carry the gas mechanical device to the assigned position, by extensive application in each trade, especially in trade that can produce waste gas such as printing, contain higher content printing waste gas, adsorbent, desorbent etc. in the medium that its main draught fan carried, mostly exist with gas-liquid mixture state, because organic gas composition is comparatively complicated in this type of waste gas, most all are flammable and explosive, so the fan that is used for carrying this type of gas all requires can not have the medium to leak out, require very high to the leakproofness of fan. The packing class of the continuous pressing mode that conventional fan adopted usually is sealed, the packing winding is on the fan main shaft, with the gas of leakage in the clearance of reduction between fan casing and the fan main shaft, but current fan sealing device is difficult to guarantee the sealed effect of fan in long-time operation, produce the leakage phenomenon easily, and be difficult to in time discover and lead to the degree of leaking comparatively seriously behind waste gas leakage usually, make the analytic liquid outflow polluted environment in the waste gas, inflammable and explosive's gas still has great potential safety hazard simultaneously.
SUMMERY OF THE UTILITY MODEL
The problem of leakage is not enough and be difficult to in time discover for solving the sealed effect of current fan, the utility model provides a sealing device of waste gas conveying fan.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a sealing device of a waste gas conveying fan comprises a shaft seal body sleeved on a fan main shaft, wherein the shaft seal body is positioned on the outer side of a fan shell, a flexible connecting ring is further sleeved on the fan main shaft, two ends of the flexible connecting ring are respectively connected with the shaft seal body and the outer wall of the fan shell, one end of the shaft seal body, far away from the flexible connecting ring, is connected with a bearing seat of the fan main shaft, a ring groove is formed in the inner wall of the shaft seal body, a packing ring is sleeved on each end of the ring groove along the axial direction of the fan main shaft, an annular oil cavity is formed between the shaft seal body and the fan main shaft by matching the inner wall of the ring groove and the outer wall of the fan main shaft, two ends of the oil cavity are sealed by the two packing rings, an oil inlet hole communicated with the oil cavity is formed in the side wall of the upper half part of the shaft seal, the air outlet is connected with a return pipe, and one end of the return pipe, which is far away from the air outlet, is connected to the inner cavity of the fan shell, so that gas which leaks to the shaft seal body from a gap between the fan shell and the main shaft of the fan flows back into the fan shell.
Preferably, the axes of the oil inlet hole and the air outlet hole are both vertically arranged, and the axes of the oil inlet hole and the air outlet hole are both intersected with the axis of the main shaft of the fan.
Preferably, the return pipe is formed by connecting a plurality of sections of pipelines in series through a pipe joint and a flange.
According to the technical scheme, the beneficial effects of the utility model are that:
the utility model provides a sealing device of waste gas conveying fan has add the oil pocket in the inside of the shaft seal body to two drilled packing rings have been installed at the both ends of oil pocket, through the sealed structure of two-stage filler, the sealing performance of the shaft seal body has been promoted, and when the damaged inefficacy messenger waste gas of drilled packing ring begins to leak, the oil of oil intracavity will spill in following the drilled packing ring, thereby personnel just can in time discover that the bearing seal became invalid and shut down the restoration, make the waste gas in the fan can not leak in a large number, eliminated the potential safety hazard.
The shaft seal body is connected with a return pipe through the air outlet hole, the return pipe is connected to the inner cavity of the fan shell, when the fan operates, air in the fan shell is continuously blown away by the fan, negative pressure can exist in the fan shell, when waste gas leaks to the space between the shaft seal body and the fan main shaft from the gap between the fan shell and the fan main shaft, the leaked waste gas flows into the return pipe to flow back into the fan shell due to the negative pressure generated by the communication between the return pipe and the inner cavity of the fan shell, the waste gas leaked from the fan shell is further reduced, and the sealing performance is greatly improved.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
FIG. 3 is a schematic front view at A in FIG. 1;
fig. 4 is a schematic front view of fig. 3 at B.
The labels in the figure are: 1. the fan comprises a fan main shaft, 2, a shaft seal body, 3, a fan shell, 4, a flexible connecting ring, 5, a bearing seat, 6, a packing ring, 7, an oil cavity, 8, an oil inlet hole, 9, an air outlet hole, 10 and a return pipe.
Detailed Description
Referring to the drawings, the specific embodiments are as follows:
the utility model provides a sealing device of fan is carried to waste gas, establish the shaft seal body 2 on fan main shaft 1 including the cover, shaft seal body 2 is located the 3 outsides of fan casing, still the cover is equipped with flexible go-between 4 on fan main shaft 1, the both ends of flexible go-between 4 respectively with shaft seal body 2 and 3 outer wall connections of fan casing, the one end that flexible go-between 4 was kept away from to shaft seal body 2 is connected with a bearing frame 5 of fan main shaft 1, flexible go-between 4 adoption is resistant oily, high temperature resistant and anticorrosive macromolecular material stamping forming.
The annular groove is formed in the inner wall of the shaft seal body 2, the annular groove is respectively sleeved with a packing ring 6 along the two axial ends of the fan main shaft 1, the packing ring 6 is made of a heat insulation and heat preservation adsorption material, an annular oil cavity 7 is formed between the shaft seal body 2 and the fan main shaft 1 through the matching of the inner wall of the annular groove and the outer wall of the fan main shaft 1, the two ends of the oil cavity 7 are sealed through the two packing rings 6, and an oil inlet hole 8 communicated with the oil cavity 7 is formed in the side wall of the upper half part of the shaft seal body 2.
The lateral wall of the lower half part of the shaft seal body 2 is provided with an air outlet hole 9, the air outlet hole 9 is positioned on one side of the oil cavity 7 close to the fan shell 3, the air outlet hole 9 is connected with a return pipe 10, the return pipe 10 is formed by mutually connecting multiple sections of pipelines in series through a pipe joint and a flange, and one end of the return pipe 10 far away from the air outlet hole 9 is connected to the inner cavity of the fan shell 3, so that gas leaking to the shaft seal body 2 from a gap between the fan shell 3 and the fan spindle 1 flows back into the fan shell 3. In order to facilitate the outflow of oil inlet and waste gas, the axis of the oil inlet hole 8 and the axis of the air outlet hole 9 are vertically arranged, and the axis of the oil inlet hole 8 and the axis of the air outlet hole 9 are intersected with the axis of the fan main shaft 1.
Claims (3)
1. The utility model provides a sealing device of waste gas conveying fan, establishes the shaft seal body (2) on fan main shaft (1) including the cover, and shaft seal body (2) are located fan casing (3) outside, its characterized in that: the fan main shaft (1) is also sleeved with a flexible connecting ring (4), two ends of the flexible connecting ring (4) are respectively connected with the shaft seal body (2) and the outer wall of the fan shell (3), one end of the shaft seal body (2) far away from the flexible connecting ring (4) is connected with a bearing seat (5) of the fan main shaft (1), the inner wall of the shaft seal body (2) is provided with a ring groove, the ring groove is respectively sleeved with a packing ring (6) along two axial ends of the fan main shaft (1), an annular oil cavity (7) is formed between the shaft seal body (2) and the fan main shaft (1) by matching the inner wall of the ring groove and the outer wall of the fan main shaft (1), two ends of the oil cavity (7) are sealed by the two packing rings (6), the side wall of the upper half part of the shaft seal body (2) is provided with an oil inlet hole (8) communicated with the oil cavity (7), the side wall of the lower half part of the shaft seal, the air outlet hole (9) is located on one side, close to the fan shell (3), of the oil cavity (7), the return pipe (10) is connected to the air outlet hole (9), one end, far away from the air outlet hole (9), of the return pipe (10) is connected to the inner cavity of the fan shell (3), and therefore gas leaking to the shaft seal body (2) from a gap between the fan shell (3) and the fan spindle (1) flows back into the fan shell (3).
2. The sealing device of an exhaust gas conveying fan according to claim 1, wherein: the axial line of the oil inlet hole (8) and the axial line of the air outlet hole (9) are both vertically arranged, and the axial line of the oil inlet hole (8) and the axial line of the air outlet hole (9) are both intersected with the axial line of the fan main shaft (1).
3. The sealing device of an exhaust gas conveying fan according to claim 1, wherein: the return pipe (10) is formed by mutually connecting a plurality of sections of pipelines in series through a pipe joint and a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921182021.4U CN210265251U (en) | 2019-07-25 | 2019-07-25 | Sealing device of waste gas conveying fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921182021.4U CN210265251U (en) | 2019-07-25 | 2019-07-25 | Sealing device of waste gas conveying fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210265251U true CN210265251U (en) | 2020-04-07 |
Family
ID=70014391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921182021.4U Active CN210265251U (en) | 2019-07-25 | 2019-07-25 | Sealing device of waste gas conveying fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210265251U (en) |
-
2019
- 2019-07-25 CN CN201921182021.4U patent/CN210265251U/en active Active
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Address after: 471000 Luoyang, Henan, Luoyang, China (Henan) free trade test zone, Luoyang section, Hi-tech Development Zone, Riverside Road No. 20 Patentee after: Luoyang Beibo sanyuanliu Fan Technology Co., Ltd Address before: 471000 Luoyang, Henan, Luoyang, China (Henan) free trade test zone, Luoyang section, Hi-tech Development Zone, Riverside Road No. 20 Patentee before: LUOYANG NORTHGLASS TAIXIN FAN TECHNOLOGY Co.,Ltd. |