CN114294421B - Piston ring sealing device for rotating shaft - Google Patents
Piston ring sealing device for rotating shaft Download PDFInfo
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- CN114294421B CN114294421B CN202111640232.XA CN202111640232A CN114294421B CN 114294421 B CN114294421 B CN 114294421B CN 202111640232 A CN202111640232 A CN 202111640232A CN 114294421 B CN114294421 B CN 114294421B
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Abstract
The invention discloses a piston ring sealing device for a rotating shaft. The piston ring sealing device comprises: the shell is sleeved outside the rotating shaft and is spaced from the rotating shaft; the magnetism isolating ring is sleeved outside the rotating shaft and is positioned in the shell; the first expansion ring seat is sleeved on the outer surface of the rotating shaft and is positioned between the magnetism isolating ring and the rotating shaft, an annular first installation groove is defined by the first expansion ring seat and a shaft shoulder of the rotating shaft, and the end part of the first installation groove, which is close to the magnetism isolating ring, is open; and the first piston ring sealing ring is arranged in the first mounting groove, and the outer peripheral surface of the first piston ring sealing ring, which is opposite to the magnetism isolating ring, is abutted against the magnetism isolating ring, wherein the first piston ring sealing ring is provided with a first piston ring gap, and a magnetic sealing body is arranged in the first piston ring gap. According to the piston ring sealing device for the rotating shaft, the magnetic sealing body is arranged at the first piston ring gap to prevent the sealing medium at the first piston ring gap from leaking, so that the sealing effect of the piston ring sealing device on the rotating shaft is improved.
Description
Technical Field
The invention relates to the technical field of piston ring sealing, in particular to a piston ring sealing device for a rotating shaft.
Background
In the related art, the rotating shaft is usually sealed by using a piston ring sealing device, but the piston ring has a gap which becomes a main leakage channel of the piston ring sealing device in stable operation, and the structural characteristics of the piston ring sealing make the piston ring sealing device difficult to realize zero leakage sealing of a sealing medium in operation, so that the use scene of the piston ring sealing device is limited.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the above-mentioned technical problems of the prior art. To this end, the present invention provides a piston ring sealing device for a rotating shaft, which can prevent leakage of a sealing medium.
The piston ring sealing device for the rotating shaft according to the embodiment of the invention comprises: the shell is sleeved outside the rotating shaft and is spaced apart from the rotating shaft; the magnetism isolating ring is sleeved outside the rotating shaft and positioned in the shell, and the outer surface of the magnetism isolating ring is in contact with the shell; the first expansion ring seat is sleeved on the outer surface of the rotating shaft and is positioned between the magnetism isolating ring and the rotating shaft, an annular first installation groove is defined by the first expansion ring seat and a shaft shoulder of the rotating shaft, and the end part of the first installation groove, which is close to the magnetism isolating ring, is open; the first piston ring sealing ring is arranged in the first mounting groove, the outer peripheral surface of the first piston ring sealing ring, which is opposite to the magnetism isolating ring, is abutted against the magnetism isolating ring, and the first piston ring sealing ring is provided with a first piston ring notch which is provided with a magnetic sealing body.
According to the piston ring sealing device for the rotating shaft, the magnetic sealing body is arranged at the first piston ring gap to prevent the sealing medium at the first piston ring gap from leaking, so that the sealing effect of the piston ring sealing device on the rotating shaft is improved.
According to some embodiments of the invention, the first piston ring notch has a first end face and a second end face which are opposite to each other, and the first end face and/or the second end face is/are provided with a magnetic adsorbing member for adsorbing the magnetic sealing body to the first piston ring notch.
Furthermore, the first terminal surface with the second terminal surface is followed the axial direction interval of pivot is equipped with a plurality ofly the magnetism adsorbs the piece, just a plurality of first terminal surface the magnetism adsorb the piece with a plurality of second terminal surface the magnetism adsorbs the piece just to setting up.
According to some embodiments of the invention, the magnetic seal is configured as a magnetic fluid.
According to some embodiments of the invention, the first piston ring seat is configured as a first piston ring seat having magnetic isolation properties.
According to some embodiments of the invention the width of the first mounting groove is larger than the width of the first piston ring sealing ring.
Further, in the axial direction of the rotating shaft, the distance between the side wall of the first mounting groove, which is far away from the shaft shoulder, and the first piston ring sealing ring is H, and the relation is satisfied: h is more than or equal to 0.05mm and less than or equal to 0.5mm.
According to some embodiments of the invention, the first expansion ring seat comprises: the magnetic isolation ring comprises an annular first body and an annular second body, wherein the first body is sleeved on the outer surface of the rotating shaft, one end of the second body is connected with the first body, and the other end of the second body extends towards the magnetic isolation ring.
According to some embodiments of the present invention, the number of the first expansion ring seats is multiple, the multiple first expansion ring seats are sequentially arranged in an axial direction of the rotating shaft, the first installation groove is defined between any two adjacent first expansion ring seats, the first expansion ring seat close to a shaft shoulder of the rotating shaft and the shaft shoulder of the rotating shaft define the first installation groove, the number of the first expansion ring sealing rings is multiple, and the multiple first expansion ring sealing rings correspond to the multiple first installation grooves one to one.
According to some embodiments of the invention, the piston ring sealing device for a rotating shaft further comprises: the second piston ring seat is sleeved on the outer surface of the rotating shaft and located on one side, away from the shaft shoulder, of the magnetic isolating ring and between the rotating shaft, the second piston ring seat is located on one side, away from the shaft shoulder, of the first piston ring seat, the second piston ring seat is adjacent to the first piston ring seat, a second installation groove is defined by the first piston ring seat, the second installation groove is close to the end portion of the magnetic isolating ring, the end portion of the magnetic isolating ring is open, the second piston ring sealing ring is arranged in the second installation groove, and the second piston ring sealing ring is provided with a second piston ring gap.
Furthermore, the second expansion ring seats and the second expansion ring sealing rings are multiple, the second expansion ring seats are sequentially arranged in the axial direction of the rotating shaft, the second mounting groove is defined between any two adjacent second expansion ring seats, and the second expansion ring sealing rings correspond to the second mounting grooves one to one.
According to some embodiments of the invention, the piston ring sealing device for a rotating shaft further comprises: and the positioning component is sleeved on the outer surface of the rotating shaft and is positioned on one side of the second expansion ring seat, which is far away from the shaft shoulder of the rotating shaft.
Further, the positioning assembly comprises: the gasket is arranged between the nut and the second piston ring seat.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural view of a piston ring seal according to an embodiment of the invention;
fig. 2 is an enlarged view of fig. 1 at a.
Reference numerals:
the magnetic sealing device comprises a shell 1, a magnetism isolating ring 2, a first expansion ring seat 3, a first expansion ring sealing ring 4, a magnetic sealing body 41, a magnetic adsorption piece 42, a first expansion ring gap 43, a first end face 431, a second end face 432, a second expansion ring seat 5, a second expansion ring sealing ring 6, a second expansion ring gap 61, a positioning component 7, a nut 71, a gasket 72, a shaft ring 8 and a rotating shaft 10.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "width", "left", "right", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that 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 explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically connected, electrically connected or can communicate with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
A piston ring sealing device for a rotating shaft according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 2.
Referring to fig. 1 and 2, a piston ring sealing apparatus for a rotating shaft includes: the magnetic isolation ring comprises a shell 1, a magnetic isolation ring 2, a first expansion ring seat 3 and a first expansion ring sealing ring 4, wherein the shell 1 is sleeved outside a rotating shaft 10 and is spaced apart from the rotating shaft 10, the magnetic isolation ring 2 is sleeved outside the rotating shaft 10 and is located in the shell 1, the outer surface of the magnetic isolation ring 2 is in contact with the shell 1, the magnetic isolation ring 2 can extend along the length direction of the shell 1, the magnetic isolation ring 2 can be made of magnetic isolation materials such as aluminum and copper, the magnetic isolation ring 2 can also be made of non-magnetic stainless steel, the magnetic isolation ring 2 can effectively isolate magnetic interference of a magnetic sealing body 41 to the shell 1 and other devices, and optionally, the magnetic isolation ring 2 is a layer of coating film arranged on the inner wall of the shell 1. The first expansion ring seat 3 is sleeved on the outer surface of the rotating shaft 10 and is positioned between the magnetism isolating ring 2 and the rotating shaft 10, the first expansion ring seat 3 and the shaft shoulder of the rotating shaft 10 define an annular first installation groove, the end part of the first installation groove close to the magnetism isolating ring 2 is open, namely, the opening of the first installation groove faces the magnetism isolating ring 2, the first installation groove and the magnetism isolating ring 2 define an annular space, the first expansion ring sealing ring 4 is arranged in the first installation groove, and the outer peripheral surface of the first expansion ring sealing ring 4 opposite to the magnetism isolating ring 2 is abutted against the magnetism isolating ring 2, wherein the first expansion ring sealing ring 4 is provided with a first expansion ring gap 43, the first expansion ring gap 43 is provided with a magnetic sealing body 41, and it can be understood that the first expansion ring sealing ring 4 is elastically deformed after being arranged in the first installation groove, the first piston ring gap 43 becomes smaller, the peripheral surface of the first piston ring sealing ring 4 is tightly attached to the magnetism isolating ring 2 under the action of elastic force, meanwhile, under the action of the pressure difference of the two sides of the first piston ring sealing ring 4, the first piston ring sealing ring 4 can be tightly attached to the side wall of the first installation groove at the low pressure side in the space of the first installation groove to form a main sealing surface, in addition, as the magnetic sealing body 41 is filled in the gap of the first piston ring gap 43, the magnetic sealing body 41 can be adsorbed at the first piston ring gap 43, and the magnetic sealing body 41 can block the first piston ring gap 43, so that the first piston ring sealing ring 4 generates the whole sealing effect, and the leakage of the sealing medium at the first piston ring gap 43 is avoided.
According to the piston ring sealing device for the rotating shaft of the embodiment of the invention, the magnetic sealing body 41 is arranged at the first piston ring gap 43 to prevent the leakage of the sealing medium at the first piston ring gap 43, so that the sealing effect of the piston ring sealing device on the rotating shaft 10 is improved.
In some embodiments of the present invention, referring to fig. 2, the first piston ring notch 43 has a first end face 431 and a second end face 432 opposite to each other, the first end face 431 and/or the second end face 432 are provided with a magnetic absorption member 42, and the magnetic absorption member 42 is configured to absorb the magnetic sealing body 41 to the first piston ring notch 43, so that the magnetic sealing body 41 fills the first piston ring notch 43, and the leakage of the sealing medium at the first piston ring notch 43 is avoided.
In some embodiments of the present invention, the first end surface 431 and the second end surface 432 are provided with the magnetic adsorption member 42. In other embodiments of the present invention, the first end 431 is provided with the magnetic attraction member 42. In other embodiments of the present invention, the second end surface 432 is provided with a magnetic attraction member 42.
In some embodiments of the present invention, the first piston ring seal 4 has magnetism to attract the magnetic seal body 41. In other embodiments of the present invention, the first piston ring seal 4 has no magnetism, and the magnetic attraction member 42 at the end face of the first piston ring notch 43 has magnetism to attract the magnetic seal body 41.
In some embodiments of the present invention, the first end surface 431 and the second end surface 432 are each provided with at least one magnetic adsorbing member 42.
In some embodiments of the present invention, referring to fig. 2, the magnetic attraction piece 42 on the first end surface 431 may extend toward the second end surface 432, the magnetic attraction piece 42 on the second end surface 432 may extend toward the first end surface 431, the first end surface 431 and the second end surface 432 are provided with a plurality of magnetic attraction pieces 42 at intervals along the axial direction of the rotating shaft 10, and the plurality of magnetic attraction pieces 42 of the first end surface 431 and the plurality of magnetic attraction pieces 42 of the second end surface 432 are arranged in an opposite manner, so that the plurality of magnetic attraction pieces 42 uniformly attract the magnetic sealing body 41, the stability of the magnetic sealing body 41 is enhanced, the attraction effect of the magnetic attraction pieces 42 on the magnetic sealing body 41 is increased, and the magnetic sealing body 41 is firmly attracted to the first expanded ring notch 43.
In some embodiments of the present invention, 3 to 10 magnetic attraction members 42 are symmetrically disposed on the first end surface 431 and the second end surface 432.
In some embodiments of the present invention, the magnetic-adsorbing members 42 may be pole teeth, and the magnetic-adsorbing members 42 may also be magnetic pole shoes, which may be embedded and inlaid at the first end surface 431 and the second end surface 432.
In some embodiments of the present invention, the magnetic sealing body 41 is configured as a magnetic fluid, the magnetic fluid can solve the problem of sealing leakage at the first piston ring gap 43 to improve the sealing effect of the first piston ring sealing ring 4, and meanwhile, the magnetic fluid can also be used as a lubricating medium, a part of the magnetic fluid can enter the shaft shoulder contacting the first piston ring sealing ring 4 or the end surface of the first piston ring seat 3, and the magnetic fluid can perform cooling and lubricating actions on the friction between the first piston ring sealing ring 4 and the contact surface thereof, thereby being beneficial to increasing the reliability of the first piston ring sealing ring 4 and the first piston ring seat 3, increasing the service life of the first piston ring sealing ring 4 and the first piston ring seat 3, and also being beneficial to reducing the temperature rise of the first piston ring sealing ring 4 under the friction action, reducing the size change of the first piston ring gap 43 caused by the temperature change, and further being beneficial to ensuring the sealing effect of the first piston ring sealing ring 4.
In some embodiments of the present invention, the first ring-expanding base 3 is configured as the first ring-expanding base 3 having magnetic isolation performance, so as to prevent magnetic interference of the magnetic sealing body 41 and the magnetic adsorbing member 42 to other devices.
In some embodiments of the present invention, the width of the first installation groove is greater than the width of the first piston ring 4, so as to avoid the first piston ring 4 from contacting and rubbing with the side walls of the two sides of the first installation groove at the same time, thereby facilitating to reduce the wear of the first piston ring 4 and the first installation groove, where the width of the first installation groove is the width of the first installation groove in the axial direction of the rotating shaft 10, and the width of the first piston ring 4 is the width of the first piston ring 4 in the axial direction of the rotating shaft 10.
In some embodiments of the present invention, referring to fig. 1, in the axial direction of the rotating shaft 10, the distance between the side wall of the first installation groove far from the shaft shoulder and the first piston ring sealing ring 4 is H, and the following relation is satisfied: h is more than or equal to 0.05mm and less than or equal to 0.5mm, namely, a gap of 0.05mm-0.5mm is formed between the side wall of the first mounting groove far away from the shaft shoulder and the first piston ring sealing ring 4 in the axial direction of the rotating shaft 10, so that friction is prevented between the first piston ring sealing ring 4 and the side wall of the first mounting groove far away from the shaft shoulder. The side wall of the first mounting groove, which is far away from the shaft shoulder, can be the side wall of the first mounting groove, which is just opposite to the shaft shoulder.
In some embodiments of the present invention, the first expansion ring seat 3 includes: the outer surface of the rotating shaft 10 is sleeved with the first body, one end of the second body is connected with the first body, the other end of the second body extends towards the magnetism isolating ring 2, it can be understood that the first body forms the bottom wall of the first mounting groove, the second body forms the side wall of one side of the first mounting groove, and the second body can be used for axially limiting the first piston ring sealing ring 4 so that the first piston ring is located in the first mounting groove in a sealing mode, and the first piston ring sealing ring 4 is prevented from being separated from the first piston ring sealing ring.
In some embodiments of the present invention, the number of the first expansion ring seats 3 is multiple, the multiple first expansion ring seats 3 are sequentially arranged in the axial direction of the rotating shaft 10, a first installation groove is defined between any two adjacent first expansion ring seats 3, the first expansion ring seat 3 close to the shaft shoulder of the rotating shaft 10 and the shaft shoulder of the rotating shaft 10 define the first installation groove, the number of the first expansion ring sealing rings 4 is multiple, and the multiple first expansion ring sealing rings 4 correspond to the multiple first installation grooves one to one. That is to say, be provided with a plurality of first ring seat 3 that rise on the pivot 10, a plurality of first mounting grooves are injectd to a plurality of first ring seat 3 that rise, are equipped with a first piston ring sealing ring 4 in every first mounting groove, from this, promote sealed effect through a plurality of first piston ring sealing rings 4.
In some embodiments of the present invention, referring to fig. 1, the piston ring sealing device for a rotating shaft further comprises: the second expansion ring seat 5 is arranged on the outer surface of the rotating shaft 10 in a sleeved mode and located between the magnetism isolating ring 2 and the rotating shaft 10, the second expansion ring seat 5 is located on one side, away from a shaft shoulder, of the first expansion ring seat 3 in the axial direction of the rotating shaft 10, a second installation groove is defined by the second expansion ring seat 5 and the adjacent first expansion ring seat 3, the end portion, close to the magnetism isolating ring 2, of the second installation groove is open, the second expansion ring sealing ring 6 is arranged in the second installation groove, the second expansion ring sealing ring 6 is provided with a second expansion ring notch 61, a magnetic sealing body 41 is not arranged at the second expansion ring notch 61, the second expansion ring sealing ring 6 can be arranged on the high-pressure side of the first expansion ring sealing ring 4, the pressure difference of the two sides of the first expansion ring sealing ring 4 can be reduced by the second expansion ring sealing ring 6, the pressure resistance of the first expansion ring sealing ring 4 is improved, and the magnetic sealing body 41 is prevented from being separated from the first expansion ring notch 43 of the first expansion ring sealing ring 4 under the condition that the pressure difference of the two sides is large.
It can be understood that the environmental pressure of the two sides of the first expansion ring seat 3 in the axial direction of the rotating shaft 10 is different, one side of the first expansion ring seat 3 is a high-pressure side, the other side of the first expansion ring seat 3 is a low-pressure side, the second expansion ring seat 5 can be arranged on the high-pressure side of the first expansion ring seat 3, so that the pressure difference of the two sides of the first expansion ring seat 3 in the axial direction of the rotating shaft 10 is reduced through the second expansion ring seal ring 6 on the second expansion ring seat 5, thereby being beneficial to improving the pressure-resistant capability of the magnetic seal body 41 on the first expansion ring seal ring 4, meanwhile, because the second expansion ring gap 61 on the second expansion ring seal ring 6 is difficult to realize complete sealing, the first expansion ring seal ring 4 can further seal the medium which cannot play a sealing role on the second expansion ring seal ring 6, thereby being beneficial to improving the sealing effect.
In some embodiments of the present invention, the number of the second expansion ring seats 5 and the number of the second expansion ring sealing rings 6 are multiple, the multiple second expansion ring seats 5 are sequentially arranged in the axial direction of the rotating shaft 10, a second installation groove is defined between any two adjacent second expansion ring seats 5, the multiple second expansion ring sealing rings 6 correspond to the multiple second installation grooves 5 one by one, that is, the rotating shaft 10 is provided with the multiple second expansion ring seats 5, the multiple second expansion ring seats 5 define the multiple second installation grooves, and each second installation groove is provided with one second expansion ring sealing ring 6, so that the impact of the high-pressure side sealing medium on the magnetic sealing body 41 on the first expansion ring sealing ring 4 is further reduced by the multiple second expansion ring sealing rings 6, the pressure resistance of the first expansion ring sealing ring 4 is increased, and the sealing effect is favorably improved.
In some embodiments of the present invention, the second piston ring seal 6 and the first piston ring seal 4 may be used in a mixture of a plurality of stages to enhance the sealing effect, and preferably, the total number of the second piston ring seal 6 and the first piston ring seal 4 does not exceed four stages.
In some embodiments of the present invention, the piston ring sealing device for a rotating shaft further comprises: the positioning component 7 is sleeved on the outer surface of the rotating shaft 10, and the positioning component 7 is located on one side of the second piston ring seat 5, which is far away from the shaft shoulder of the rotating shaft 10. The positioning assembly 7 can limit the second expansion ring seat 5 and the first expansion ring seat 3 in the axial direction of the rotating shaft 10, so that when the rotating shaft 10 rotates, the second expansion ring seat 5 and the first expansion ring seat 3 are prevented from moving axially, and the first expansion ring sealing ring 4 is prevented from being separated from the first mounting groove and the second expansion ring sealing ring 6 is prevented from being separated from the second mounting groove.
In some embodiments of the invention, the positioning assembly 7 comprises: the nut 71 and the gasket 72, the gasket 72 is arranged between the nut 71 and the second ring-expanding seat 5, the first ring-expanding seat 3, the second ring-expanding seat 5 and the positioning component 7 can be sequentially sleeved on the rotating shaft 10, the nut 71 is installed at the end part of the rotating shaft 10 far away from the shaft shoulder, the nut 71 can directly or indirectly apply pressing force to the shaft shoulder to the second ring-expanding seat 5 through the gasket 72, so that the axial end surface of the second ring-expanding seat 5 is attached to the first ring-expanding seat 3 adjacent to the second ring-expanding seat, and the axial end surface of the first ring-expanding seat 3 close to the shaft shoulder is attached to the shaft shoulder of the rotating shaft 10, so as to prevent the second ring-expanding seat 5 and the first ring-expanding seat 3 from axial movement in the rotating process of the rotating shaft 10.
In some embodiments of the present invention, referring to fig. 1, a collar 8 is further disposed between the positioning assembly 7 and the second piston ring seat 5, the collar 8 is sleeved on the rotating shaft 10, the collar 8 can space the positioning assembly 7 from the second piston ring seat 5, and the nut 71 can apply pressing force to the shoulder of the second piston ring seat 5 through the gasket 72 and the collar 8.
In some embodiments of the present invention, referring to fig. 1, three-stage piston ring sealing rings, i.e. two first piston ring sealing rings 4 and one second piston ring sealing ring 6, are arranged in sequence from right to left at the shoulder of the rotating shaft 10, and two first piston ring seats 3 and one second piston ring seat 5 are respectively matched with the three-stage piston ring sealing rings, each piston ring sealing ring can be tightly attached to the right end surface of the mounting groove under the action of the pressure difference between the left side and the right side, wherein the second piston ring sealing ring 6 on the high-pressure side can reduce the pressure difference between the two first piston ring sealing rings 4 on the right side thereof to increase the pressure resistance of each first piston ring sealing ring 4, so as to prevent the magnetic sealing body 41 from being separated from the first piston ring gap 43 of the first piston ring sealing ring 4 under the condition that the pressure difference between the two sides is large, and at the same time, the second piston ring gap 61 on the second piston ring sealing ring 6 on the high-pressure side can hardly achieve complete sealing of the piston ring, and the sealing of the piston ring 6 can not achieve zero sealing medium leakage.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. A piston ring seal for a rotating shaft, comprising:
the shell is sleeved outside the rotating shaft and is spaced apart from the rotating shaft;
the magnetism isolating ring is sleeved outside the rotating shaft and positioned in the shell, and the outer surface of the magnetism isolating ring is in contact with the shell;
the first expansion ring seat is sleeved on the outer surface of the rotating shaft and is positioned between the magnetism isolating ring and the rotating shaft, an annular first installation groove is defined by the first expansion ring seat and a shaft shoulder of the rotating shaft, and the end part of the first installation groove, which is close to the magnetism isolating ring, is open;
the first piston ring sealing ring is arranged in the first mounting groove, the outer peripheral surface, opposite to the magnetism isolating ring, of the first piston ring sealing ring is abutted to the magnetism isolating ring, the first piston ring sealing ring is provided with a first piston ring gap, and a magnetic sealing body is arranged in the first piston ring gap;
the piston ring sealing device further comprises: the second piston ring seat is sleeved on the outer surface of the rotating shaft and located on one side, away from the shaft shoulder, of the magnetism isolating ring and between the rotating shafts, the axial direction of the rotating shafts enables the second piston ring seat to be located on one side, away from the shaft shoulder, of the first piston ring seat, the second piston ring seat is adjacent to the first piston ring seat, a second installation groove is defined jointly by the first piston ring seat, the second installation groove is close to the end portion of the magnetism isolating ring and is open, the second piston ring sealing ring is arranged in the second installation groove, the second piston ring sealing ring is provided with a second piston ring notch, and a magnetic sealing body is not arranged in the second piston ring notch.
2. The piston ring sealing device for a rotating shaft according to claim 1, wherein the first piston ring notch has a first end face and a second end face which are opposite to each other, and the first end face and/or the second end face is provided with a magnetic adsorbing member for adsorbing the magnetic sealing body to the first piston ring notch.
3. The piston ring sealing device for a rotating shaft according to claim 2, wherein a plurality of said magnetic adsorbing members are provided at intervals on said first end surface and said second end surface along an axial direction of said rotating shaft, and said plurality of said magnetic adsorbing members on said first end surface are disposed opposite to said plurality of said magnetic adsorbing members on said second end surface.
4. The piston ring sealing device for a rotating shaft according to any one of claims 1 to 3, wherein the magnetic sealing body is configured as a magnetic fluid.
5. The piston ring seal for a rotating shaft according to claim 1, wherein said first piston ring seat is configured as a first piston ring seat having magnetism isolating performance.
6. The piston ring sealing device for a rotating shaft according to claim 1, wherein a width of said first mounting groove in an axial direction is larger than a width of said first piston ring sealing ring in an axial direction.
7. The piston ring sealing device for a rotating shaft according to claim 6, wherein a distance between a side wall of the first mounting groove away from the shaft shoulder and the first piston ring sealing ring in an axial direction of the rotating shaft is H, and a relation is satisfied: h is more than or equal to 0.05mm and less than or equal to 0.5mm.
8. The piston ring seal for a rotating shaft according to claim 1, wherein said first piston ring seat comprises: the magnetic isolation ring comprises an annular first body and an annular second body, wherein the first body is sleeved on the outer surface of the rotating shaft, one end of the second body is connected with the first body, and the other end of the second body extends towards the magnetic isolation ring.
9. The piston ring sealing device for the rotating shaft according to claim 1, wherein the number of the first piston ring seats is plural, the plural first piston ring seats are sequentially arranged in the axial direction of the rotating shaft, the first mounting groove is defined between any two adjacent first piston ring seats, the first piston ring seat close to the shaft shoulder of the rotating shaft and the shaft shoulder of the rotating shaft define the first mounting groove, the number of the first piston ring sealing rings is plural, and the plural first piston ring sealing rings and the plural first mounting grooves are in one-to-one correspondence.
10. The piston ring sealing device for a rotating shaft according to claim 1, wherein the number of the second piston ring seats and the number of the second piston ring sealing rings are plural, the plural second piston ring seats are sequentially arranged in an axial direction of the rotating shaft, the second mounting groove is defined between any two adjacent second piston ring seats, and the plural second piston ring sealing rings correspond to the plural second mounting grooves one to one.
11. The piston ring seal for a rotating shaft according to claim 1, further comprising: and the positioning assembly is sleeved on the outer surface of the rotating shaft and is positioned on one side, far away from the shaft shoulder of the rotating shaft, of the second expansion ring seat.
12. The piston ring seal for a rotating shaft of claim 11 wherein said positioning assembly comprises: the gasket is arranged between the nut and the second piston ring seat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111640232.XA CN114294421B (en) | 2021-12-29 | 2021-12-29 | Piston ring sealing device for rotating shaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111640232.XA CN114294421B (en) | 2021-12-29 | 2021-12-29 | Piston ring sealing device for rotating shaft |
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| CN114294421A CN114294421A (en) | 2022-04-08 |
| CN114294421B true CN114294421B (en) | 2023-03-31 |
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| CN109780219B (en) * | 2019-03-08 | 2020-09-29 | 石家庄学院 | Split type shell structure, magnetic liquid sealing device and shell sealing method |
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