CN111622980B - Mechanical seal foreign matter abrasion-proof structure - Google Patents
Mechanical seal foreign matter abrasion-proof structure Download PDFInfo
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- CN111622980B CN111622980B CN202010326922.7A CN202010326922A CN111622980B CN 111622980 B CN111622980 B CN 111622980B CN 202010326922 A CN202010326922 A CN 202010326922A CN 111622980 B CN111622980 B CN 111622980B
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- mechanical seal
- sealing
- pump cover
- mechanical
- flow channel
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- 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
- F04D29/086—Sealings especially adapted for liquid pumps
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- 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
- F04D29/106—Shaft sealings especially adapted for liquid pumps
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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 discloses a mechanical seal foreign matter abrasion prevention structure, which relates to the technical field of submersible pumps, and adopts the technical scheme that the mechanical seal foreign matter abrasion prevention structure comprises a volute, a pump cover connected with the upper end of the volute, and a driving shaft inserted in the pump cover, wherein the driving shaft is connected with an impeller body positioned in the volute, one end, penetrating out of the pump cover, of the driving shaft is sleeved with a mechanical seal body, the top end of the volute is provided with a mechanical seal seat used for fixing the mechanical seal body, a mechanical seal cavity is formed between the pump cover and the impeller body, the upper end opening of the mechanical seal cavity is positioned on one side, far away from the driving shaft, of the mechanical seal body, the mechanical seal cavity comprises a connecting seal flow passage and a seal ring flow passage which are mutually connected, and the inner diameter of the upper end of the seal ring flow passage is smaller than the inner diameter of the lower end of the seal ring flow passage. The invention has the effects of preventing sundries from being accumulated and invading into the mechanical sealing body, avoiding damage to the mechanical sealing body and simultaneously prolonging the service life of the abrasion structure.
Description
Technical Field
The invention relates to the technical field of submersible pumps, in particular to a mechanical seal foreign matter abrasion prevention structure.
Background
The mechanical seal is a shaft seal device which is kept attached by the relatively sliding end faces under the action of fluid pressure, elasticity or magnetic force of a compensation mechanism and the like and is matched with auxiliary seal to achieve leakage resistance.
The mechanical seal mainly comprises a rotating component (a movable ring which rotates along with a shaft and can move axially), a static component (a static ring which is arranged on a shell and does not rotate), a pressing element (a spring), a sealing element and the like. The pressure of the dynamic ring pressing element (spring) makes the end surface of the dynamic ring pressed against the end surface of the static ring, thereby forming a tiny axial gap and achieving the purpose of sealing.
However, when foreign matter exists between the dynamic ring and the static ring of the mechanical seal, the foreign matter generates friction on the sealing surface due to the rotation of the rotating assembly (dynamic ring), thereby causing the sealing surface to be worn and causing the sealing failure. Meanwhile, the submersible pump runs below the water surface, and the medium is basically rainwater, sewage and the like containing solid particles and other foreign matters, so that if the solid particles and other foreign matters in the medium enter between the movable ring and the static ring of the mechanical seal, the abrasion of the mechanical seal is accelerated, the service life of the mechanical seal is influenced, and the improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a mechanical seal foreign matter abrasion prevention structure which has the effect of effectively preventing foreign matters such as solid particles from entering a seal surface.
In order to realize the purpose, the invention provides the following technical scheme:
the mechanical seal foreign matter abrasion-proof structure comprises a volute, a pump cover and a drive shaft, wherein the pump cover is connected with the upper end of the volute, the drive shaft is inserted in the pump cover, the drive shaft is connected with an impeller body located in the volute, a mechanical seal body is sleeved at one end, penetrating out of the pump cover, of the drive shaft, a mechanical seal seat used for fixing the mechanical seal body is arranged at the top end of the volute, a mechanical seal cavity is formed between the pump cover and the impeller body, an upper end opening of the mechanical seal cavity is located on one side, away from the drive shaft, of the mechanical seal body, the mechanical seal cavity comprises a connecting seal flow channel and a seal ring flow channel which are connected with each other, and the inner diameter of the upper end of the seal ring flow channel is smaller than that of the lower end of the seal ring flow channel.
Through adopting above-mentioned technical scheme, when the drive shaft drives the impeller body and rotates, form mechanical seal chamber between impeller body in the rotation and the pump cover, and the sealing ring runner in mechanical seal chamber is the shape that the internal diameter of upper end is less than the lower extreme, when effectively avoiding debris such as solid particle to get into the mechanical seal intracavity, make debris such as solid particle that get into the mechanical seal intracavity throw away from this sealed runner down under the effect of centrifugal force through the pivoted impeller body, thereby effectively prevent debris such as solid particle from piling up and invading inside the mechanical seal body, prolong the life of this mechanical seal anti-foreign matter abrasion structure when avoiding causing the harm to the mechanical seal body.
The invention is further configured to: the sealing ring runner includes that at least twice slope seal runner and be used for connecting twice is corresponding the arc seal runner of slope seal runner, the sealed runner of arc kickup and downside side diameter are less than upside side diameter.
Through adopting above-mentioned technical scheme, when the drive shaft drives the impeller body and rotates, form the mechanical seal chamber between impeller body in the rotation and the pump cover, and the sealed runner of arc kickup and downside side diameter are less than upside side diameter, when effectively avoiding debris such as solid particle to get into the mechanical seal intracavity, make debris such as solid particle that get into the mechanical seal intracavity throw away from this mechanical seal intracavity along tangential direction under the effect of centrifugal force through the pivoted impeller body, thereby effectively prevent that debris such as solid particle from piling up and invading inside the mechanical seal body, prolong the life of this mechanical seal anti-foreign matter erosion structure when avoiding causing the harm to the mechanical seal body.
The invention is further configured to: the inclined sealing flow channel is provided with three channels, the arc sealing flow channel is provided with two channels, and the two channels are respectively positioned between the two corresponding inclined sealing flow channels.
By adopting the technical scheme, under the interval connection of the three inclined sealing runners and the two arc-shaped sealing runners, the cleaning capability of the sealing ring runners on solid particles and other impurities entering the mechanical sealing cavity is obviously improved, so that the service life of the mechanical sealing foreign matter abrasion-proof structure is prolonged, and the use reliability is ensured.
The invention is further configured to: the connecting sealing flow channel comprises a transverse sealing flow channel, and two ends of the transverse sealing flow channel are respectively communicated with the inclined sealing flow channel and the inner part of the volute.
By adopting the technical scheme, the stable and effective sealing effect is achieved, and impurities such as solid particles are effectively prevented from entering the mechanical sealing cavity.
The invention is further configured to: the connection sealing runner is a cross star sealing runner, and the cross star sealing runner comprises a transverse sealing runner and a plurality of concentric annular angle grooves which are arranged at equal intervals along the diameter direction of the transverse sealing runner.
Through adopting above-mentioned technical scheme, the sealed runner of cross star who has horizontal sealed runner and a plurality of annular angular groove has the effect that effectively prevents debris such as solid particle and invades along the lateral wall invasion of sealing ring runner to effectively prevent debris such as solid particle from piling up and invading inside the mechanical seal body and cause the harm to the mechanical seal body, show the life of extension this mechanical seal foreign matter erosion prevention structure.
The invention is further configured to: and a plurality of concentric annular angular grooves which are arranged at equal intervals are arranged at the corresponding part of the lower side of the pump cover and the corresponding part of the upper side of the impeller body.
Through adopting above-mentioned technical scheme, further promote the sealed runner of cross star to the effect that prevents debris such as solid particle from invading along the lateral wall of sealing ring runner to effectively prevent debris such as solid particle from piling up and invading inside the mechanical seal body and cause the harm to the mechanical seal body, show the life who prolongs this mechanical seal foreign matter erosion prevention structure.
The invention is further configured to: the annular angle groove positioned at the corresponding part of the pump cover and the annular angle groove positioned at the corresponding part of the impeller body are vertically symmetrical.
Through adopting above-mentioned technical scheme, the annular angle groove of longitudinal symmetry is used for blockking the continuous removal of debris such as fixed granule to reach the purpose that effectively prevents debris such as solid particle from piling up and invading inside the mechanical seal body and cause the harm to the mechanical seal body when preventing debris such as solid particle from invading along the lateral wall of sealing ring runner, show the life of extension this mechanical seal prevents foreign matter erosion structure.
The invention is further configured to: the longitudinal section of the annular angle groove is in an isosceles triangle shape, and the included angle of the bottom is larger than 0 degree and smaller than 180 degrees.
Through adopting above-mentioned technical scheme, annular angle groove possesses the effect that blocks the continuous removal of debris such as fixed granule, and has the effect of the processing of being convenient for.
In conclusion, the invention has the following beneficial effects: the cross star sealing flow channel with the transverse sealing flow channel and the annular corner grooves effectively prevents sundries such as solid particles from invading along the side wall of the sealing ring flow channel, so that the mechanical sealing body is prevented from being damaged due to the fact that the sundries such as the solid particles are accumulated and invaded into the mechanical sealing body, and the service life of the mechanical sealing foreign matter abrasion preventing structure is prolonged remarkably; and the sundries such as solid particles and the like entering the mechanical seal cavity are thrown out of the mechanical seal cavity along the tangential directions of the inclined seal flow channel and the arc seal flow channel under the action of centrifugal force through the inclined seal flow channel and the arc seal flow channel, so that the sundries such as the solid particles and the like are effectively prevented from being accumulated and invading into the mechanical seal body, the damage to the mechanical seal body is avoided, and meanwhile, the service life of the mechanical seal foreign body abrasion preventing structure is prolonged.
Drawings
FIG. 1 is a schematic structural view of the present embodiment;
fig. 2 is an enlarged schematic view of a portion a of fig. 1.
Description of the reference numerals: 1. a volute; 2. an impeller body; 3. a mechanical seal seat; 4. a pump cover; 5. a drive shaft; 6. a mechanical seal body; 7. a seal ring flow channel; 71. inclining the sealing flow channel; 72. an arc-shaped sealing flow channel; 8. the cross star seals the flow channel; 81. transversely sealing the flow channel; 82. an annular corner groove.
Detailed Description
In order to make the technical solution and advantages of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1, a mechanical seal structure for preventing foreign matter from being abraded comprises a scroll 1, a pump cover 4 connected with the upper end of the scroll 1, and a driving shaft 5 inserted into the pump cover 4. The driving shaft 5 is connected with the impeller body 2 positioned in the scroll 1, and the impeller body 2 rotates in the scroll 1 and plays a role of conducting media under the driving of the driving shaft 5. One end of the driving shaft 5, which penetrates out of the pump cover 4, is sleeved with a mechanical sealing body 6, and the top end of the volute 1 is provided with a mechanical sealing seat 3 for fixing the mechanical sealing body 6, so that the purpose of effectively sealing the inner end and the outer end of the driving shaft 5 is achieved.
As shown in fig. 1 and 2, a mechanical seal cavity is formed between the pump cover 4 and the impeller body 2. The opening at the upper end of the mechanical sealing cavity is positioned at one side of the mechanical sealing body 6, which is far away from the driving shaft 5, and is positioned between the mechanical sealing seat 3 and the pump cover 4. The mechanical seal cavity comprises a connecting seal flow channel and a seal ring flow channel 7 which are connected with each other, and the inner diameter of the upper end of the seal ring flow channel 7 is smaller than that of the lower end. Therefore, when the driving shaft 5 drives the impeller body 2 to rotate, a mechanical seal cavity is formed between the rotating impeller body 2 and the pump cover 4, and the inner diameter of the seal ring flow channel 7 of the mechanical seal cavity is smaller than that of the lower end, so that impurities such as solid particles are effectively prevented from entering the mechanical seal cavity, and simultaneously, the impurities such as the solid particles entering the mechanical seal cavity are thrown out from the seal flow channel under the action of centrifugal force through the rotating impeller body 2, thereby effectively preventing the impurities such as the solid particles from being accumulated and invading into the mechanical seal body 6, and prolonging the service life of the mechanical seal foreign matter abrasion prevention structure while avoiding damage to the mechanical seal body 6.
It should be mentioned that the sealing ring flow passage 7 includes at least two inclined sealing flow passages 71 and an arc-shaped sealing flow passage 72 for connecting the two corresponding inclined sealing flow passages 71. In the present embodiment, three inclined sealing runners 71 are provided and two arc-shaped sealing runners 72 are provided, and the two arc-shaped sealing runners 72 are respectively located between the two corresponding inclined sealing runners 71. The arcuate seal channel 72 curves upwardly and has a lower side diameter that is less than an upper side diameter. Therefore, when the driving shaft 5 drives the impeller body 2 to rotate, a mechanical seal cavity is formed between the rotating impeller body 2 and the pump cover 4, the arc-shaped seal flow channel 72 is bent upwards, the diameter of the side surface of the lower side of the arc-shaped seal flow channel is smaller than that of the side surface of the upper side of the arc-shaped seal flow channel, so that impurities such as solid particles entering the mechanical seal cavity can be effectively prevented from entering the mechanical seal cavity, and simultaneously, the impurities such as the solid particles can be thrown out of the mechanical seal cavity along the tangential direction of the arc-shaped seal flow channel 72 under the action of centrifugal force through the rotating impeller body 2, thereby effectively preventing the impurities such as the solid particles from being accumulated and invading into the mechanical seal body 6, prolonging the service life of the mechanical seal structure for preventing the impurities from being abraded and ensuring the use reliability while avoiding causing damage to the mechanical seal body 6.
As shown in fig. 2, the connecting sealed flow path includes a transverse sealed flow path 81. Two ends of the transverse sealing flow channel 81 are respectively communicated with the corresponding inclined sealing flow channel 71 and the interior of the scroll 1, so that a stable and effective sealing effect is achieved, and impurities such as solid particles are effectively prevented from entering the mechanical sealing cavity. It should be noted that the connection sealing flow passage is a cross star sealing flow passage 8. The cross star sealing runner 8 comprises a transverse sealing runner 81 and a plurality of concentric annular angular grooves 82 which are arranged at equal intervals along the diameter direction of the transverse sealing runner 81, so that the cross star sealing runner 8 with the transverse sealing runner 81 and the annular angular grooves 82 has the effect of effectively preventing sundries such as solid particles from invading along the side wall of the sealing ring runner 7, thereby effectively preventing the sundries such as the solid particles from being accumulated and invading into the mechanical sealing body 6 to damage the mechanical sealing body 6 and simultaneously obviously prolonging the service life of the mechanical sealing foreign matter erosion preventing structure. The longitudinal section of annular angle groove 82 is isosceles triangle shape, and the contained angle of bottom is greater than 0 and is less than 180, and then makes annular angle groove 82 possess the effect that blocks the continuous removal of debris such as fixed granule, and has the effect of the processing of being convenient for.
In order to further improve the effect of the cross-shaped sealing flow passage 8 on preventing impurities such as solid particles from invading along the side wall of the sealing ring flow passage 7, a plurality of concentric annular angular grooves 82 which are arranged at equal intervals are arranged at corresponding positions on the lower side of the pump cover 4 and at corresponding positions on the upper side of the impeller body 2, so that the impurities such as the solid particles are effectively prevented from being accumulated and invading into the mechanical sealing body 6 to damage the mechanical sealing body 6, and meanwhile, the service life of the mechanical sealing structure for preventing the impurities from being abraded is remarkably prolonged. Furthermore, the annular angle groove 82 at the corresponding part of the pump cover 4 and the annular angle groove 82 at the corresponding part of the impeller body 2 are vertically symmetrical, and the continuous movement of impurities such as fixed particles is blocked by the vertically symmetrical annular angle grooves 82, so that the aim of effectively preventing the impurities such as solid particles from being accumulated and invading into the mechanical sealing body 6 to damage the mechanical sealing body 6 is achieved when the impurities such as the solid particles are prevented from invading along the side wall of the sealing ring flow channel 7, and the service life of the mechanical sealing structure for preventing the impurities from being abraded is remarkably prolonged.
In summary, the cross-shaped star seal flow channel 8 with the transverse seal flow channel 81 and the plurality of annular corner grooves 82 effectively prevents impurities such as solid particles from invading along the side wall of the seal ring flow channel 7, so that the mechanical seal body 6 is effectively prevented from being damaged due to the fact that the impurities such as the solid particles are accumulated and invaded into the mechanical seal body 6, and the service life of the mechanical seal foreign matter abrasion preventing structure is remarkably prolonged; and the impurities such as solid particles entering the mechanical seal cavity are thrown out of the mechanical seal cavity along the tangential direction of the inclined seal channel 71 and the arc seal channel 72 under the action of centrifugal force under the driving of the impeller body 2 through the inclined seal channel 71 and the arc seal channel 72, so that the impurities such as the solid particles are effectively prevented from being accumulated and invading into the mechanical seal body 6, the damage to the mechanical seal body 6 is avoided, and the service life of the mechanical seal structure for preventing the abrasion of the impurities is prolonged.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but all technical solutions that fall under the spirit of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the present invention may occur to those skilled in the art without departing from the principle of the present invention, and such modifications and embellishments should also be considered as within the scope of the present invention.
Claims (5)
1. The utility model provides a mechanical seal prevents foreign matter erosion structure, including volute (1), with pump cover (4) that volute (1) upper end is connected and peg graft in drive shaft (5) in pump cover (4), drive shaft (5) are connected with and are located impeller body (2) in volute (1), drive shaft (5) are followed mechanical seal body (6) have been cup jointed to the one end that wears out in pump cover (4), the top of volute (1) is provided with and is used for fixing mechanical seal seat (3) of mechanical seal body (6), pump cover (4) with form mechanical seal chamber between impeller body (2), the upper end opening in mechanical seal chamber is located mechanical seal body (6) are kept away from one side of drive shaft (5), its characterized in that: the mechanical sealing cavity comprises a connecting sealing flow passage and a sealing ring flow passage (7) which are connected with each other, and the inner diameter of the upper end of the sealing ring flow passage (7) is smaller than that of the lower end;
The sealing ring flow channel (7) comprises at least two inclined sealing flow channels (71) and an arc-shaped sealing flow channel (72) used for connecting the two corresponding inclined sealing flow channels (71), wherein the arc-shaped sealing flow channel (72) is bent upwards, and the diameter of the lower side surface is smaller than that of the upper side surface;
the connecting sealing flow channel comprises a transverse sealing flow channel (81), and two ends of the transverse sealing flow channel (81) are respectively communicated with the corresponding inclined sealing flow channel (71) and the interior of the volute (1);
the connecting sealing runner is a cross star sealing runner (8), and the cross star sealing runner (8) comprises a transverse sealing runner (81) and a plurality of concentric annular corner grooves (82) which are arranged at equal intervals along the diameter direction of the transverse sealing runner (81).
2. A mechanical seal foreign-body abrasion preventing structure according to claim 1, wherein: the inclined sealing flow channels (71) are provided with three channels, the arc-shaped sealing flow channels (72) are provided with two channels, and the two channels of the arc-shaped sealing flow channels (72) are respectively located between the corresponding three inclined sealing flow channels (71).
3. A mechanical seal foreign-body abrasion preventing structure according to claim 1, wherein: and a plurality of concentric annular angular grooves (82) which are arranged at equal intervals are arranged at the corresponding part on the lower side of the pump cover (4) and the corresponding part on the upper side of the impeller body (2).
4. A mechanical seal foreign-body abrasion preventing structure according to claim 3, wherein: the annular angle groove (82) positioned at the corresponding part of the pump cover (4) and the annular angle groove (82) positioned at the corresponding part of the impeller body (2) are vertically symmetrical.
5. A mechanical seal foreign-body abrasion preventing structure according to claim 4, wherein: the longitudinal section of the annular angle groove (82) is in an isosceles triangle shape, and the included angle of the bottom is larger than 0 degree and smaller than 180 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010326922.7A CN111622980B (en) | 2020-04-23 | 2020-04-23 | Mechanical seal foreign matter abrasion-proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010326922.7A CN111622980B (en) | 2020-04-23 | 2020-04-23 | Mechanical seal foreign matter abrasion-proof structure |
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| Publication Number | Publication Date |
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| CN111622980A CN111622980A (en) | 2020-09-04 |
| CN111622980B true CN111622980B (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010326922.7A Active CN111622980B (en) | 2020-04-23 | 2020-04-23 | Mechanical seal foreign matter abrasion-proof structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115059622B (en) * | 2022-06-27 | 2023-07-11 | 南京科技职业学院 | Submersible sewage pump with sand prevention function |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4721313A (en) * | 1986-09-12 | 1988-01-26 | Atlas Copco Comptec, Inc. | Anti-erosion labyrinth seal |
| CN102444625A (en) * | 2010-09-30 | 2012-05-09 | 株式会社神户制钢所 | Foreign matter adhesion prevention structure on back surface of impeller of centrifugal compressor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6713596A (en) * | 1967-10-06 | 1969-04-09 | ||
| US4386786A (en) * | 1982-02-08 | 1983-06-07 | Merck & Co., Inc. | Adjustable pump seal with tapered conical members |
| EP0721546B1 (en) * | 1993-09-25 | 1998-12-02 | KSB Aktiengesellschaft | Turbo-machine with reduced attrition |
| CN2644727Y (en) * | 2003-09-24 | 2004-09-29 | 宜兴市宙斯泵业有限公司 | Modified sealing device for pump |
| CN2913692Y (en) * | 2006-01-13 | 2007-06-20 | 赵志强 | Centrifugal pump |
| CN201428643Y (en) * | 2009-07-09 | 2010-03-24 | 西安泵阀总厂有限公司 | Sealed cycle structure of medium self-flushing machine |
| CN203023116U (en) * | 2012-12-18 | 2013-06-26 | 辽宁长志泵业有限公司 | Vertical type single-stage and single-suction chemical centrifugal pump |
| CN206478037U (en) * | 2017-01-10 | 2017-09-08 | 江苏建安泵业制造有限公司 | A kind of mechanical sealing structure for pump for conveying particle and resisting medium |
-
2020
- 2020-04-23 CN CN202010326922.7A patent/CN111622980B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4721313A (en) * | 1986-09-12 | 1988-01-26 | Atlas Copco Comptec, Inc. | Anti-erosion labyrinth seal |
| CN102444625A (en) * | 2010-09-30 | 2012-05-09 | 株式会社神户制钢所 | Foreign matter adhesion prevention structure on back surface of impeller of centrifugal compressor |
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| CN111622980A (en) | 2020-09-04 |
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