CN215567944U - Non-contact labyrinth mechanical sealing element - Google Patents
Non-contact labyrinth mechanical sealing element Download PDFInfo
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- CN215567944U CN215567944U CN202121888170.XU CN202121888170U CN215567944U CN 215567944 U CN215567944 U CN 215567944U CN 202121888170 U CN202121888170 U CN 202121888170U CN 215567944 U CN215567944 U CN 215567944U
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Abstract
The utility model relates to the technical field of mechanical seal, and discloses a non-contact labyrinth mechanical seal, which comprises: a rotating shaft; the rotating shaft is rotatably arranged in the stator in a penetrating way, the stator is provided with an extending end, and the extending end is provided with a sewage outlet; the rotor is sleeved on the rotating shaft and positioned at one end of the stator, a zigzag interception gap is arranged between the stator and the rotor, and the interception gap is communicated with the sewage discharge outlet; the rotor is provided with an expansion cavity communicated with the closure gap, and an opening and closing piece is arranged in the expansion cavity and used for opening or closing the closure gap. The utility model has the advantages that the zigzag cutoff clearance is arranged between the stator and the rotor which are not in contact with each other, the leakage is prevented by utilizing the labyrinth seal principle, the abrasion between parts can be reduced, and the service life of the mechanical sealing element is prolonged.
Description
Technical Field
The utility model relates to the technical field of mechanical sealing, in particular to a non-contact labyrinth mechanical sealing element.
Background
Mechanical seals are widely used in pumps, compressors, mixing machines and other equipment, and have the function of isolating leakage paths between rotating parts (such as shafts) and static structural cavities and preventing harmful media in the cavities from leaking to the outside; the mechanical seal is typically comprised of a moving component fixed to the shaft and a stationary component fixed to the housing.
The bearing is a common component in mechanical seal, and the common protection method of the bearing is to adopt contact seal (framework oil seal or dust ring), which is sealed by contacting with the main shaft, so that lubricating oil is not lost or tissue pollutants enter the bearing cavity, the service life of the bearing is short, and seal abrasion and main shaft abrasion can occur, thus causing seal failure.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a non-contact labyrinth mechanical seal which can reduce wear of parts and increase the service life of the mechanical seal.
To achieve the above object, the present invention provides a non-contact labyrinth mechanical seal, comprising:
a rotating shaft;
the rotating shaft is rotatably arranged in the stator in a penetrating mode, the stator is provided with an extending end, and a sewage discharge outlet is formed in the extending end;
the rotor is sleeved on the rotating shaft and is positioned at one end of the stator, a zigzag interception gap is arranged between the stator and the rotor, and the interception gap is communicated with the sewage discharge outlet;
the rotor is provided with an expansion cavity communicated with the closure gap, an opening and closing piece is arranged in the expansion cavity, and the opening and closing piece is used for opening or closing the closure gap.
According to the non-contact labyrinth mechanical seal, one end of the rotor, which is close to the stator, is provided with the seal teeth, one end of the stator, which is close to the rotor, is provided with the tooth grooves, the seal teeth are arranged in the tooth grooves, and the intercepting gap is arranged between the seal teeth and the tooth grooves.
According to the non-contact labyrinth mechanical seal, the expansion cavity is arranged on the inner side of the seal tooth, and the opening and closing piece is arranged as a first seal ring;
when the rotating shaft stops, the first sealing ring is attached to the inner wall of the expansion cavity and attached to the inner wall of the tooth groove; when the rotating shaft rotates, the first sealing ring is attached to the inner wall of the expansion cavity and separated from the inner wall of the tooth groove.
According to the non-contact labyrinth mechanical sealing element, one end of the stator, which is close to the rotor, is provided with an annular bulge, the annular bulge is positioned on the outer side of the sealing tooth, the rotor is provided with an annular groove, and the end part of the annular bulge is arranged in the annular groove.
According to the non-contact labyrinth mechanical seal, the outer side of the seal tooth is provided with the liquid accumulation groove; the sewage draining port is arranged on the annular bulge and is positioned on the outer side of the liquid accumulating tank.
According to the non-contact labyrinth mechanical seal, the inner side of the stator is provided with a backflow groove, and one end of the backflow groove, which is far away from the rotor, is provided with a backflow port.
According to the non-contact labyrinth mechanical sealing element, a first sealing groove is formed in the outer side of the stator, and a second sealing ring is arranged in the first sealing groove.
According to the non-contact labyrinth mechanical seal, the outer side of the stator is also provided with a limit ring.
According to the non-contact labyrinth mechanical sealing element, the inner side of the rotor is provided with a second sealing groove, and two third sealing rings are arranged in the second sealing groove.
The utility model has the following beneficial effects:
1. a zigzag cutoff gap is arranged between the stator and the rotor which are not in contact with each other, leakage is prevented by using the labyrinth seal principle, the abrasion of parts can be reduced, and the service life of a mechanical sealing element is prolonged;
2. the inner side of the stator is provided with the backflow groove, and lubricating oil can enter the cavity again through the backflow groove, so that the waste of the lubricating oil is avoided;
3. the annular bulge arranged on the stator can isolate the pollutants on the outer side, and is provided with a sewage outlet through centrifugal force, so that the pollutants can be discharged from the sewage outlet.
Drawings
FIG. 1 is a cross-sectional view of the overall construction of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
in the figure: 100. a rotating shaft; 200. a stator; 210. a tooth socket; 220. an annular projection; 221. a sewage draining outlet; 230. a reflux tank; 231. a return port; 240. a first seal groove; 241. a second seal ring; 250. a limiting ring; 300. a rotor; 310. a seal tooth; 311. expanding the cavity; 312. a liquid accumulation tank; 320. opening and closing the piece; 321. a first seal ring; 330. an annular groove; 340. a second seal groove; 341. a third seal ring; 400. a shut-off gap.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
1-2, a non-contact labyrinth mechanical seal, comprising:
the rotating shaft 100, the rotating shaft 100 is rotatably mounted inside the bearing housing, the mechanical sealing element is mounted at the joint of the rotating shaft 100 and the bearing housing, and sealing is guaranteed; the stator 200, the rotating shaft 100 is rotatably arranged in the stator 200 in a penetrating way, the stator 200 is provided with an extending end, the extending end is provided with a sewage outlet 221, wherein, the stator 200 is arranged on the bearing box and is fixed, and pollutants in the stator 200 can be discharged from the sewage outlet 221; the rotor 300, the rotor 300 cover is established on the pivot 100 to be located the one end of stator 200, is equipped with tortuous shutoff clearance 400 between stator 200 and the rotor 300, and shutoff clearance 400 communicates with drain 221, and lubricating oil produces the throttling effect when passing through tortuous shutoff clearance 400 to prevent the purpose of revealing, and stator 200 and rotor 300 are not contact each other, can reduce the wearing and tearing between each part, improve the life of sealing member. The rotor 300 is provided with an expansion cavity 311 communicated with the shut-off gap 400, the expansion cavity 311 is provided with an opening member 320 therein, and the opening member 320 is used for opening or closing the shut-off gap 400. it should be noted that, when the rotating shaft 100 stops, the opening member 320 closes the shut-off gap 400, and when the rotating shaft 100 rotates, the opening member 320 opens the shut-off gap 400. By arranging the zigzag cutoff gap 400 between the stator 200 and the rotor 300 which are not in contact with each other, when lubricating oil passes through the cutoff gap 400, throttling effect can be generated, then the lubricating oil enters the expansion cavity 311 to consume gas speed energy, and resistance is generated by passing through the cutoff gap 400 and the expansion cavity 311 to prevent gas from leaking outwards, so that the purpose of sealing is achieved; the zigzag cutoff gap 400 is arranged between the stator 200 and the rotor 300 which are not in contact with each other, leakage is prevented by using the labyrinth sealing principle, abrasion of parts can be reduced, and the service life of the sealing element is prolonged.
The end of the rotor 300 close to the stator 200 is provided with a sealing tooth 310, the end of the stator 200 close to the rotor 300 is provided with a tooth slot 210, the sealing tooth 310 is arranged in the tooth slot 210, the shut-off gap 400 is arranged between the sealing tooth 310 and the tooth slot 210, a zigzag throttling gap can be formed through the cooperation of the sealing tooth 310 and the tooth slot 210, and the sealing performance when the rotating shaft 100 stops can be ensured through the opening piece 320 in the expansion cavity 311.
The expansion cavity 311 is disposed inside the seal teeth 310, the opening element 320 is a first seal ring 321, when the rotating shaft 100 rotates, the rotor 300 can drive the first seal ring 321 to rotate, the diameter of the first seal ring 321 is increased under the action of centrifugal force, and at this time, the first seal ring 321 can be separated from the stator 200.
When the rotating shaft 100 stops, the first sealing ring 321 is attached to the inner wall of the expansion cavity 311 and the inner wall of the tooth groove 210, at this time, the cut-off gap 400 between the stator 200 and the rotor 300 is closed, and the first sealing ring 321 can ensure the sealing performance when the rotating shaft 100 stops; when the rotating shaft 100 rotates, the first sealing ring 321 is attached to the inner wall of the expansion cavity 311 and separated from the inner wall of the tooth socket 210, the rotating shaft 100 rotates to drive the first sealing ring 321 to rotate, the diameter of the first sealing ring 321 is increased under the action of centrifugal force, the first sealing ring 321 is separated from the inner wall of the tooth socket 210, the stator 200 and the rotor 300 are guaranteed to be in a non-contact state under the working state, abrasion of parts is reduced, and the service life of a sealing element is prolonged.
The end of the stator 200 close to the rotor 300 is provided with an annular protrusion 220, the annular protrusion 220 is positioned outside the seal teeth 310, the rotor 300 is provided with an annular groove 330, the end of the annular protrusion 220 is arranged in the annular groove 330, and the annular protrusion 220 can enable the outside contaminants to be limited to the outside.
The outer side of the sealing tooth 310 is provided with a liquid accumulating groove 312; the drain 221 sets up on annular bulge 220 to be located the outside of hydrops groove 312, hydrops groove 312 is used for holding the inside pollutant of bearing box, when pivot 100 rotates, can produce centrifugal force, can throw away the pollutant through centrifugal force, makes the pollutant discharge through drain 221.
The inside of stator 200 is equipped with return groove 230, and return groove 230 is kept away from the one end of rotor 300 and is equipped with backward flow mouth 231, and lubricating oil can get into the cavity again through return groove 230, has avoided the waste of lubricating oil.
The first sealing groove 240 is arranged on the outer side of the stator 200, the second sealing ring 241 is arranged in the first sealing groove 240, and the second sealing ring 241 can ensure the sealing performance of the joint of the stator 200 and the bearing box.
The stator 200 is further provided with a limiting ring 250 on the outer side, and the limiting ring 250 can prevent the mechanical sealing element from retracting into the bearing box.
In the present embodiment, the first sealing groove 240 is disposed at an end of the stator 200 away from the rotor 300, and the limit ring 250 is disposed at an end of the stator 200 close to the rotor 300.
The inboard of rotor 300 is equipped with second seal groove 340, is equipped with two third sealing washer 341 in the second seal groove 340, and the leakproofness of rotor 300 and pivot 100 junction can be guaranteed to third sealing washer 341 to install two third sealing washers 341 in second seal groove 340, increased area of contact, thereby increase mechanical seal's axle holding power, make sealed effect better.
The utility model provides a non-contact labyrinth mechanical sealing element, wherein a rotor 300 is provided with a sealing tooth 310, a stator 200 is provided with a tooth groove 210, the sealing tooth 310 is arranged in the tooth groove 210, so that the rotor 300 and the stator 200 surround to form a zigzag intercepting gap 400, the rotor 300 is provided with an expansion cavity 311, the expansion cavity 311 is internally provided with a first sealing ring 321, when a rotating shaft 100 stops, the first sealing ring 321 is attached to the inner wall of the tooth groove 210, the intercepting gap 400 is closed, the sealing performance when the rotating shaft 100 stops is ensured, and when the rotating shaft 100 rotates, the first sealing ring 321 can be expanded under the action of centrifugal force so as to be separated from the inner wall of the tooth groove 210; by arranging the zigzag cutoff gap 400 between the stator 200 and the rotor 300 which are not in contact with each other, when lubricating oil passes through the cutoff gap 400, throttling effect can be generated, then the lubricating oil enters the expansion cavity 311 to consume gas velocity energy, and resistance is generated when the lubricating oil passes through the cutoff gap 400 and the expansion cavity 311, so that gas is prevented from leaking outwards, and the purpose of sealing is achieved; namely, the leakage is prevented by utilizing the labyrinth seal principle, the abrasion between parts can be reduced, and the service life of the mechanical seal is prolonged.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Claims (9)
1. A non-contacting labyrinth mechanical seal, comprising:
a rotating shaft;
the rotating shaft is rotatably arranged in the stator in a penetrating mode, the stator is provided with an extending end, and a sewage discharge outlet is formed in the extending end;
the rotor is sleeved on the rotating shaft and is positioned at one end of the stator, a zigzag interception gap is arranged between the stator and the rotor, and the interception gap is communicated with the sewage discharge outlet;
the rotor is provided with an expansion cavity communicated with the closure gap, an opening and closing piece is arranged in the expansion cavity, and the opening and closing piece is used for opening or closing the closure gap.
2. A non-contact labyrinth mechanical seal as set forth in claim 1, wherein said rotor has seal teeth at an end thereof adjacent said stator, said stator has tooth slots at an end thereof adjacent said rotor, said seal teeth being disposed in said tooth slots, and said flow cutoff gap being disposed between said seal teeth and said tooth slots.
3. A non-contact labyrinth mechanical seal as set forth in claim 2, wherein said expansion cavity is disposed inside said seal tooth, said opening element being provided as a first seal ring;
when the rotating shaft stops, the first sealing ring is attached to the inner wall of the expansion cavity and attached to the inner wall of the tooth groove; when the rotating shaft rotates, the first sealing ring is attached to the inner wall of the expansion cavity and separated from the inner wall of the tooth groove.
4. A non-contact labyrinth mechanical seal as set forth in claim 2, wherein said stator is provided with an annular projection at an end thereof adjacent to said rotor, and said annular projection is located outside said seal teeth, and said rotor is provided with an annular groove in which an end portion of said annular projection is disposed.
5. A non-contact labyrinth mechanical seal as set forth in claim 4, wherein a liquid accumulation groove is provided on the outer side of said seal tooth; the sewage draining port is arranged on the annular bulge and is positioned on the outer side of the liquid accumulating tank.
6. A non-contact labyrinth mechanical seal as set forth in claim 1, wherein said stator is provided with a return groove on an inner side thereof, and a return port is provided at an end of said return groove remote from said rotor.
7. A non-contact labyrinth mechanical seal as set forth in claim 1, wherein said stator is provided with a first seal groove on its outside, and said first seal groove is provided with a second seal ring therein.
8. A non-contact labyrinth mechanical seal as set forth in claim 1, wherein a retainer ring is further provided on the outside of said stator.
9. A non-contact labyrinth mechanical seal as set forth in claim 1, wherein said rotor is provided on its inside with a second seal groove having two third seal rings disposed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121888170.XU CN215567944U (en) | 2021-08-12 | 2021-08-12 | Non-contact labyrinth mechanical sealing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121888170.XU CN215567944U (en) | 2021-08-12 | 2021-08-12 | Non-contact labyrinth mechanical sealing element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215567944U true CN215567944U (en) | 2022-01-18 |
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ID=79835215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121888170.XU Active CN215567944U (en) | 2021-08-12 | 2021-08-12 | Non-contact labyrinth mechanical sealing element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215567944U (en) |
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2021
- 2021-08-12 CN CN202121888170.XU patent/CN215567944U/en active Active
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