CN219299523U - Roots blower sealing device - Google Patents
Roots blower sealing device Download PDFInfo
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- CN219299523U CN219299523U CN202320368075.XU CN202320368075U CN219299523U CN 219299523 U CN219299523 U CN 219299523U CN 202320368075 U CN202320368075 U CN 202320368075U CN 219299523 U CN219299523 U CN 219299523U
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- sealing
- air inlet
- seal
- roots blower
- wallboard
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Abstract
The utility model discloses a Roots blower sealing device which comprises a sealing seat and a rotating shaft, wherein the sealing seat is arranged on the inner side of a wallboard of a blower, the rotating shaft is supported on the wallboard through a bearing, a sealing component is arranged between the sealing seat and the rotating shaft, the sealing component is arranged on the inner side of the wallboard in the axial direction, the sealing component comprises a sealing sleeve, the outer circle of the sealing sleeve is matched with the sealing seat, the inner hole of the sealing sleeve is matched with the rotating shaft, and the sealing sleeve is in sealing connection with the rotating shaft and rotates along with the rotating shaft. Compared with the sealing structure in the prior art, the sealing structure has good sealing performance, basically ensures zero leakage of medium, is suitable for working conditions with different pressures, has long service life, does not need frequent replacement, is simple to maintain and has low cost, and the problems of high mechanical and filler sealing or dry gas sealing cost and frequent replacement and maintenance cost are solved.
Description
Technical Field
The utility model relates to the technical field of blowers, in particular to a Roots blower sealing device, which is applied to a gas sealing device for conveying special gas by the Roots blower.
Background
Since the Roots blower usually adopts labyrinth seal to convey air, but the leakage amount of the labyrinth seal is larger, the labyrinth seal is obviously unsuitable for conveying flammable and explosive gas, and the mechanical seal or dry gas seal can basically prevent the leakage of the gas, but has high cost, so that a sealing device with good sealing effect and low manufacturing cost is required to be developed to fill the blank of the part.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a Roots blower sealing device. Compared with the sealing structure in the prior art, the sealing structure has good sealing performance, basically ensures zero leakage of medium, is suitable for working conditions with different pressures, has long service life, does not need frequent replacement, is simple to maintain and has low cost, and the problems of high mechanical and filler sealing or dry gas sealing cost and frequent replacement and maintenance cost are solved.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a roots fan sealing device, includes sealing seat, pivot, and the wallboard inboard of fan is located to the sealing seat, the pivot passes through the bearing and supports on the wallboard, be equipped with sealing member between sealing seat and the pivot, sealing member locates the axial inboard of wallboard, sealing member includes the seal cover, and the excircle of seal cover cooperates with sealing seat, hole and pivot cooperation, seal cover and pivot sealing connection and rotate along with the pivot.
The inner hole of the wallboard is provided with a sealing ring, and the sealing ring is sleeved on the outer circle of one end of the sealing sleeve, which is close to the wallboard.
The sealing sleeve is provided with an annular groove at the excircle position matched with the sealing seat, a sealing ring is arranged on the annular groove, an air inlet is arranged on the side wall of the sealing seat, the axis of the air inlet is perpendicular to the axis of the rotating shaft, the annular groove is symmetrically arranged along the axial direction of the sealing sleeve by the axis of the air inlet, and the air inlet is connected with a sealing gas container with preset pressure through a pipeline.
The annular grooves are provided with two or more, and each annular groove is provided with a sealing ring.
The annular grooves and the sealing rings are provided with an even number.
The sealing sleeve is provided with an annular air inlet groove on the outer circle of the corresponding position of the air inlet.
An air outlet is arranged on the sealing sleeve at the other side opposite to the air inlet, the air outlet is matched with the annular air inlet groove, and the air outlet is connected with the sealing gas container through a pipeline.
The sealing gas is nitrogen.
The sealing ring adopts a self-tensioning sealing ring with a notch.
The sealing ring adopts a cast iron material structure.
The beneficial effects of the utility model are as follows:
1. the sealing device comprises a sealing seat and a rotating shaft, wherein a sealing component is arranged between the sealing seat and the rotating shaft, the sealing component is arranged on the inner side of a wallboard in the axial direction, the sealing component comprises a sealing sleeve, the outer circle of the sealing sleeve is matched with the sealing seat, an inner hole is matched with the rotating shaft, the sealing sleeve is in sealing connection with the rotating shaft and rotates along with the rotating shaft, an annular groove is arranged at the outer circle position of the sealing sleeve matched with the sealing seat, a sealing ring is arranged on the annular groove, an air inlet is arranged on the side wall of the sealing seat, the axis of the air inlet is perpendicular to the axis of the rotating shaft, the annular groove is symmetrically arranged along the axis of the sealing sleeve in the axial direction of the sealing sleeve, and the air inlet is connected with a sealing gas container with preset pressure through a pipeline. Compared with the traditional labyrinth seal, the utility model has good sealing performance and basically ensures zero leakage of the medium; compared with the working condition that the packing seal is only suitable for the working condition that the pressure is lower, the utility model can be suitable for the working condition that the pressure is different, the service life of the utility model is long, frequent replacement is not needed, the utility model has simple maintenance and low cost, and the problems of high cost and frequent replacement maintenance cost of the mechanical and packing seal or dry gas seal are solved.
2. The seal cover is equipped with the ring channel in the excircle position with seal seat complex, be equipped with the sealing ring on the ring channel, be equipped with the air inlet on the seal seat lateral wall, the air inlet is connected with the sealed gas container of predetermined pressure through the pipeline, is equipped with the gas outlet on the seal cover of the opposite side of air inlet, and the gas outlet cooperates with annular air inlet, and the gas outlet passes through the pipeline to be connected with sealed gas container to collect the sealed gas of revealing, like nitrogen gas, carry out sealed gas's cyclic utilization.
3. The utility model is especially suitable for the air sealing device for conveying inflammable and explosive gas by the Roots blower, the pressure of the sealing medium is convenient to adjust, the pressure and the flow of the sealing gas are always higher than the pressure of the conveying medium by adjusting the pressure and the flow of the sealing gas, the application range is wider, and the sealing gas led back from the outlet can be repeatedly used, thereby further reducing the operation cost.
4. The sealing gas is nitrogen, the temperature of the nitrogen used for sealing is low, and the temperature of the sealing part, the impeller shaft, the bearing and other parts can be reduced to a certain extent, so that the whole operation of the fan is more stable.
5. The self-tensioning sealing ring with the notch is adopted, the sealing ring is made of cast iron material, the cost is low, and the sealing ring can be automatically compensated after being worn, so that the service life is long.
6. According to the self-tensioning sealing ring with the notch, the sealing is carried out by utilizing the blocking and throttling principle, the sealing ring is attached to the inner hole of the sealing seat by means of self elasticity, the pre-tensioning sealing is formed at the outer circle part of the sealing ring, gas can only leak downstream through the gap between the sealing ring and the annular groove, the sealing effect is better, and medium gas in a fan cavity can be effectively prevented from leaking from a tiny gap along the leakage direction.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is an enlarged view of a portion of the first seal of FIG. 1;
FIG. 3 is an enlarged partial schematic view of the leakage gas and sealing nitrogen flow path of FIG. 2.
In the figure:
a seal seat 1, an air inlet 11 and an air outlet 12;
a seal ring 2;
the sealing sleeve 3, the annular groove 31 and the annular air inlet groove 32;
a rotating shaft 4;
a medium gas 6;
a fan cavity 7;
a leakage direction 8;
sealing part 9, sealing part one 91 and sealing part two 92;
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments.
As shown in fig. 1-3, a sealing device for a Roots blower comprises a sealing seat 1 and a rotating shaft 4, wherein the sealing seat 1 is arranged on the inner side of a wallboard 10 of the blower, and the rotating shaft 4 is supported on the wallboard 10 through a bearing 101. In this embodiment, the rotating shaft 4 includes a plurality of shafts that need to be sealed and leak-proof by the Roots blower, and the sealing portion 9 on each shaft includes portions that need to be sealed at different positions on the shaft, such as a sealing portion 91 and a sealing portion two 92 in the figure.
The sealing component comprises a sealing sleeve 3, the outer circle of the sealing sleeve 3 is matched with the sealing seat 1, the inner hole is matched with the rotating shaft 4, and the sealing sleeve 3 is in sealing connection with the rotating shaft 4 and rotates along with the rotating shaft 4.
The inner hole of the wallboard 10 is provided with a sealing ring 102, and the sealing ring 102 is sleeved on the outer circle of one end of the sealing sleeve 3 close to the wallboard 10.
The sealing sleeve 3 is provided with an annular groove 31 at the outer circle position matched with the sealing seat 1, and the annular groove is provided with a sealing ring 2.
The sealing ring 2 adopts a self-tensioning sealing ring with a notch. The sealing ring is made of cast iron. The sealing ring made of cast iron is low in cost, and can be automatically compensated after being worn, so that the service life is long.
Two or more annular grooves 31 are provided, and a seal ring 2 is provided on each annular groove, respectively.
The annular grooves 31, the sealing rings 2 are provided with an even number.
The side wall of the sealing seat 1 is provided with an air inlet 11, the axis of the air inlet is perpendicular to the axis of the rotating shaft, the annular grooves 31 are symmetrically arranged along the axial direction of the sealing sleeve 3 along the axis of the air inlet, and the air inlet 11 is connected with a nitrogen container with preset pressure through a pipeline.
The sealing sleeve 3 is provided with an annular air inlet groove 32 on the outer circle of the corresponding position of the air inlet 11.
The sealing sleeve 3 on the other side opposite to the air inlet 11 is provided with an air outlet 12, the air outlet 12 is matched with the annular air inlet groove 32, and the air outlet 12 is connected with a nitrogen container through a pipeline to collect leaked nitrogen and recycle the nitrogen.
The present utility model uses self-expanding sealing rings with cuts to seal using occlusion and throttling principles. As shown in the figure, when in use, a plurality of sealing rings 2 are sleeved into the annular groove 31 of the shaft sleeve 3, the sealing rings are attached to the inner hole of the sealing seat 1 by means of self elasticity, and a pre-tightening seal is formed at the outer circle part of the sealing rings. The gas can only leak downstream through the gap between the sealing ring and the annular groove. When the sealing device works, the upstream sealing ring is tightly attached to the upstream end face of the annular groove 31 under the pressure action of the high-pressure nitrogen 5 at the outer side, the downstream sealing ring is tightly attached to the downstream end face of the annular groove 31, the high-pressure nitrogen 5 entering the gap fills the back clearance space, so that the sealing between the outer circle of the sealing ring and the inner hole of the sealing seat is further enhanced, and meanwhile, the high-pressure nitrogen forms a gas seal to prevent the medium gas 6 in the fan cavity 7 from leaking from the micro clearance along the leakage direction 8. The nitrogen 5 is introduced from the bottom air inlet 11 and discharged from the upper air outlet 12, and can be recycled. Meanwhile, the temperature of the high-pressure nitrogen is lower, the temperature of a sealing part of the fan can be effectively reduced, and the sealing service life is prolonged.
The utility model is especially suitable for the air sealing device for conveying inflammable and explosive gas by the Roots blower, the pressure of the sealing medium is convenient to adjust, the pressure and the flow of the sealing nitrogen can be adjusted by the pressure regulating valve of the nitrogen auxiliary system, so that the pressure of the sealing nitrogen is always higher than the pressure of the conveying medium, the application range is wider, the nitrogen guided back from the outlet can be repeatedly used, and the running cost is further reduced. Meanwhile, the temperature of nitrogen used for sealing is low, and the temperature of the sealing part, the impeller shaft, the bearing and other parts can be reduced to a certain extent, so that the whole operation of the fan is more stable.
In the description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", etc. refer to the orientation or positional relationship based on that shown in the drawings, and are merely for the purpose of describing the present utility model and do not require that the present utility model must be constructed or operated in a specific orientation, and thus should not be construed as limiting the present utility model. "connected" and "connected" in the present utility model are to be understood broadly, and may be, for example, connected or detachably connected; the connection may be direct or indirect through intermediate members, and the specific meaning of the terms may be understood in detail by those skilled in the art.
The foregoing has been described in what is considered to be the preferred embodiments of the utility model, and the description of specific examples is only intended to provide a better understanding of the principles of the utility model. It will be apparent to those skilled in the art that modifications and equivalents may be made in accordance with the principles of the utility model, and such modifications and equivalents are considered to fall within the scope of the utility model.
Claims (10)
1. The utility model provides a roots fan sealing device, includes sealing seat, pivot, and the wallboard inboard of fan is located to the sealing seat, the pivot passes through the bearing to be supported on the wallboard, characterized by, be equipped with sealing member between sealing seat and the pivot, sealing member locates the axial inboard of wallboard, sealing member includes the seal cover, and the excircle of seal cover cooperates with sealing seat, hole and pivot cooperation, seal cover and pivot sealing connection and rotate along with the pivot.
2. The Roots blower sealing device according to claim 1, wherein the inner hole of the wallboard is provided with a sealing ring, and the sealing ring is sleeved on the outer circle of the sealing sleeve close to one end of the wallboard.
3. The Roots blower sealing device according to claim 1, wherein the sealing sleeve is provided with an annular groove at an outer circle position matched with the sealing seat, the annular groove is provided with a sealing ring, the side wall of the sealing seat is provided with an air inlet, the axis of the air inlet is perpendicular to the axis of the rotating shaft, the annular groove is symmetrically arranged along the axial direction of the sealing sleeve along the axis of the air inlet, and the air inlet is connected with a sealed gas container with preset pressure through a pipeline.
4. A Roots blower seal as claimed in claim 3, wherein there are two or more annular grooves, each of which is provided with a sealing ring.
5. The Roots blower seal device according to claim 4, wherein said annular groove, seal ring is provided in an even number.
6. The Roots blower sealing device according to claim 3, wherein the sealing sleeve is provided with an annular air inlet groove on the outer circle of the corresponding position of the air inlet.
7. The Roots blower sealing device as set forth in claim 6, wherein a sealing sleeve on the opposite side of the air inlet is provided with an air outlet which is engaged with the annular air inlet groove, the air outlet being connected with the sealing gas container through a pipe.
8. The Roots blower seal of claim 6, wherein said sealing gas is nitrogen.
9. The Roots blower seal of claim 3, wherein said seal ring is a self-expanding seal ring with a slit.
10. The Roots blower seal of claim 9, wherein said seal ring is of cast iron construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320368075.XU CN219299523U (en) | 2023-03-02 | 2023-03-02 | Roots blower sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320368075.XU CN219299523U (en) | 2023-03-02 | 2023-03-02 | Roots blower sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219299523U true CN219299523U (en) | 2023-07-04 |
Family
ID=86982175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320368075.XU Active CN219299523U (en) | 2023-03-02 | 2023-03-02 | Roots blower sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219299523U (en) |
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2023
- 2023-03-02 CN CN202320368075.XU patent/CN219299523U/en active Active
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