CN216112169U - Step shaft single-end-face mechanical sealing structure - Google Patents
Step shaft single-end-face mechanical sealing structure Download PDFInfo
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- CN216112169U CN216112169U CN202122309530.2U CN202122309530U CN216112169U CN 216112169 U CN216112169 U CN 216112169U CN 202122309530 U CN202122309530 U CN 202122309530U CN 216112169 U CN216112169 U CN 216112169U
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- ring
- seat
- gland
- static
- mechanical seal
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- 238000007789 sealing Methods 0.000 title claims abstract description 61
- 230000003068 static effect Effects 0.000 claims abstract description 33
- 210000004907 gland Anatomy 0.000 claims abstract description 32
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008094 contradictory effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model provides a mechanical sealing structure of a single end face of a stepped shaft, belonging to the technical field of mechanical sealing and comprising: the movable ring assembly comprises a movable ring seat and a movable ring, and the movable ring is in linkage connection with the movable ring seat; the static ring assembly comprises a static ring seat and a static ring, the static ring is connected with the dynamic ring, and the static ring seat is connected with the static ring; the gland, its with quiet ring seat is connected, the gland is provided with throw-away collar and elastic component, the throw-away collar with quiet ring linkage is connected, the one end of elastic component with the gland is connected, the other end of elastic component with the throw-away collar is connected, the elastic component promotes quiet ring with the rotating ring is contradicted and is connected. The utility model has the beneficial effects that: the mechanical seal structure can be suitable for mechanical seal of the step shaft, and is compact in overall structure, short in occupied shaft body length and high in practicability.
Description
Technical Field
The utility model belongs to the technical field of mechanical sealing, and relates to a mechanical sealing structure for a single end face of a stepped shaft.
Background
The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.
The utility model provides an application number is 201921829819.3's chinese utility model discloses a single-ended mechanical seal device, including first sealing washer, its characterized in that: the right side of the first sealing ring is provided with a movable ring, the inner of the movable ring is provided with a shaft sleeve, the right side of the movable ring is provided with a stationary ring, the right side of the stationary ring is provided with a second sealing ring, the outer side of the second sealing ring is connected with a push ring, the push ring is positioned on the inner side of the left side of the flange, the inner side of the right side of the flange is provided with a third sealing ring, the third sealing ring is positioned on the outer side of the left side of the throttle ring, the right side of the throttle ring is provided with a first screw, the outer end of the first screw is provided with a driving sleeve, the outer side of the driving sleeve is provided with a second screw, the outer side of the second screw is respectively provided with a third screw and a limiting block, the left surface of the flange is provided with a gasket, the inner side of the movable ring is provided with a spring, and the inner left end of the shaft sleeve is provided with a fourth sealing ring.
The single-end-face mechanical seal in the prior art cannot be applied to the step shaft, the whole structure is not compact enough, and the shaft body occupied by the whole mechanical seal structure is long, so that the mechanical seal has a large improvement space for solving the problems.
Disclosure of Invention
The utility model aims to provide a mechanical sealing structure of a single end face of a stepped shaft, aiming at the problems in the prior art.
The purpose of the utility model can be realized by the following technical scheme: a stepped shaft single end face mechanical seal structure comprising:
the movable ring assembly comprises a movable ring seat and a movable ring, and the movable ring is in linkage connection with the movable ring seat;
the static ring assembly comprises a static ring seat and a static ring, and the static ring is connected with the static ring seat;
the gland, its with quiet ring seat is connected, the gland is provided with throw-out collar and elastic component, quiet ring with the throw-out collar linkage is connected, the one end of elastic component with the gland is connected, the other end of elastic component with the throw-out collar is connected, and the elastic component passes through the throw-out collar promotes quiet ring with the rotating ring is contradicted and is connected.
Preferably, a first special-shaped sealing ring is arranged between the stationary ring and the stationary ring seat, an inner ring surface of the first special-shaped sealing ring is in surface contact with the stationary ring, and an outer ring surface of the first special-shaped sealing ring is in surface contact with the stationary ring seat.
The preferred still includes sealed dish, sealed dish cover is established on the gland, sealed dish with be provided with second abnormal shape sealing washer between the gland, the inner circle face of second abnormal shape sealing washer with quiet ring seat forms the face contact, the outer circle face of second abnormal shape sealing washer with sealed dish forms the face contact.
Preferably, the movable ring seat is of a bowl-shaped structure and is provided with an abutting end face, and the abutting end face is provided with a sealing gasket.
Preferably, the movable ring seat is provided with a driving pin, and the driving pin is connected with the movable ring.
Preferably, the push ring is provided with a protruding part, the gland is provided with a locking groove, and the protruding part is connected with the locking groove.
Preferably, the push ring is provided with a stop pin, and the stop pin is connected with the stationary ring.
Preferably, the elastic member is a wave spring.
Compared with the prior art, the utility model has the beneficial effects that:
1. the mechanical seal structure can be suitable for mechanical seal of the step shaft, and is compact in overall structure, short in occupied shaft body length and high in practicability.
2. The special-shaped sealing ring is used for replacing an O-shaped ring, the line contact sealing of the O-shaped ring is improved to surface contact sealing, so that a larger sealing surface is provided, and even if the contact surface is uneven, the better sealing effect can be ensured due to the existence of the larger sealing surface.
3. The rotating ring seat is provided with the conflict terminal surface, thereby can will compress tightly the axial displacement that the piece set up restriction rotating ring seat on the terminal surface of contradicting, thereby prevent that the rotating ring seat from taking place axial displacement under the exogenic action and appearing leaking to make this mechanical seal structure's leakproofness better, still be provided with sealed the pad on the terminal surface of contradicting in addition, when compressing tightly the piece setting on the terminal surface of contradicting, sealed pad can guarantee to compress tightly the leakproofness between piece and the rotating ring seat.
4. Through the cooperation of the push ring and the wave spring, the axial movement of the static ring can be prevented, and the static ring is pressed on the movable ring, so that the sealing performance between the static ring and the movable ring is better.
5. The bulge of the push ring is connected with the locking groove of the gland, and the gland is static during working, so that the gland can limit the rotation of the push ring, and meanwhile, the stop pin on the push ring is connected with the static ring, so that the push ring can limit the rotation of the static ring, and the sealing performance between the movable ring and the static ring is better.
Drawings
Fig. 1 is a schematic view of a stepped shaft single-end-face mechanical seal structure of the present invention.
Fig. 2 is an enlarged schematic view of a portion a of fig. 1.
Fig. 3 is a cross sectional view of the matching part of the gland and the push ring of the mechanical sealing structure with the single end surface of the stepped shaft.
In the figure, 100, step axis; 100a, a first step shaft; 100b, a second step shaft; 100c, a third step axis; 100d, a fourth step shaft; 110. a rotating ring assembly; 111. a movable ring seat; 112. a moving ring; 113. a drive pin; 114. an abutting end face; 115. a gasket; 120. a stationary ring assembly; 121. a stationary ring seat; 122. a stationary ring; 130. sealing the disc; 140. A first profiled sealing ring; 150. a second special-shaped sealing ring; 160. a gland; 161. a locking groove; 170. a push ring; 171. a boss portion; 172. a retaining pin; 180. an elastic member.
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.
As shown in fig. 1 and 2, a single-end mechanical sealing structure of a stepped shaft 100 includes: the moving ring assembly 110 includes a moving ring seat 111 and a moving ring 112, and the moving ring 112 is connected to the moving ring seat 111 in a linkage manner.
Preferably, the step shaft 100 includes a first step shaft 100a, a second step shaft 100b, a third step shaft 100c and a fourth step shaft 100d, the movable ring seat 111 is sleeved on the first step shaft 100a and the second step shaft 100b, the movable ring 112 is embedded on the movable ring seat 111, and the second step shaft 100b passes through the movable ring 112. The rotating ring seat 111 may rotate with the rotation of the step shaft 100, and the rotating ring 112 may rotate with the rotation of the rotating ring seat 111, so that the rotating ring 112 rotates together with the step shaft 100.
And the static ring assembly 120 comprises a static ring seat 121 and a static ring 122, wherein the static ring 122 is connected with the dynamic ring 112, and the static ring seat 121 is connected with the static ring 122.
Preferably, an end surface of the stationary ring 122 is connected with an end surface of the movable ring 112 in an abutting manner to form a sealing abutting surface, the sealing abutting surface can ensure that no leakage occurs between the movable ring 112 and the stationary ring 122, the second stepped shaft 100b penetrates through the stationary ring 122, and the stationary ring 122 is embedded in the stationary ring seat 121 and a sealing ring is arranged between the stationary ring and the stationary ring seat 121.
The gland 160 is connected with the stationary ring seat 121, the gland 160 is provided with a push ring 170 and an elastic member 180, the stationary ring 122 is connected with the push ring 170 in a linkage manner, one end of the elastic member 180 is connected with the gland 160, the other end of the elastic member 180 is connected with the push ring 170, and the elastic member 180 pushes the stationary ring 122 to be connected with the movable ring 112 in an abutting manner.
Preferably, the gland 160 is sleeved on the fourth step shaft 100d, the second step shaft 100b penetrates through the elastic member 180 and the push ring 170, the push ring 170 is located in the gland 160, the gland 160 can limit the rotation of the push ring 170, one end of the elastic member 180 is connected and fixed with the gland 160, the other end of the elastic member is connected with the push ring 170 in an abutting manner, and meanwhile, the elastic member 180 is always in a compressed state and can apply an axial pushing force to the push ring 170, wherein the axial pushing force is towards the stationary ring 122 as shown in the figure.
Because the push ring 170 is connected to the stationary ring 122 in an interference manner, the elastic member 180 also applies an axial pushing force to the stationary ring 122 toward the stationary ring 122 as shown in the figure, so that the stationary ring 122 is tightly abutted against the movable ring 112, thereby ensuring that no leakage problem occurs between the stationary ring 122 and the movable ring 112.
The mechanical seal is realized through the connection and the arrangement of the parts, meanwhile, the single-end-face mechanical seal can be suitable for the step shaft 100, the overall structure is compact, the occupied shaft body length can be reduced, and the practicability is higher.
As shown in fig. 1 and 2, in addition to the above-mentioned embodiment, a first special-shaped seal ring 140 is disposed between the stationary ring 122 and the stationary ring seat 121, and the first special-shaped seal ring 140 has an inner ring surface and an outer ring surface, wherein the inner ring surface is in contact with the outer surface of the stationary ring 122, the outer ring surface is in contact with the inner surface of the stationary ring seat 121, and the first special-shaped seal ring 140 is in surface contact with both the stationary ring 122 and the stationary ring seat 121.
As shown in fig. 1 and fig. 2, on the basis of the above embodiment, the sealing device further includes a sealing disc 130, the sealing disc 130 is sleeved on the gland 160, and a second special-shaped sealing ring 150 is disposed between the sealing disc 130 and the gland 160.
Preferably, the second seal ring 150 has an inner ring surface and an outer ring surface, wherein the inner ring surface is in interference connection with the stationary ring seat 121, the outer ring surface is in interference connection with the seal disc 130, and the second seal ring 150 is in surface contact with both the stationary ring seat 121 and the seal disc 130.
It should be noted that, in the mechanical sealing structure, the first special-shaped sealing ring 140 and the second special-shaped sealing ring 150 are used to replace the O-rings, so as to seal between the stationary ring 122 and the stationary ring seat 121 and between the stationary ring seat 121 and the sealing disc 130, and successfully improve the line contact sealing of the original O-rings into the surface contact sealing, so as to form a larger sealing surface, greatly improve the sealing effect, and simultaneously reduce the precision requirement of the surfaces of the matching parts, and even if the contact surfaces are uneven, the mechanical sealing structure can also achieve effective sealing.
As shown in fig. 1, in addition to the above embodiment, the movable ring seat 111 is formed in a bowl shape, and an abutting end surface 114 is provided at an end portion thereof, and a gasket 115 is further provided on the abutting end surface 114.
It should be pointed out that, axial movement may occur to the rotating ring seat 111 under the impact of a medium, thereby causing the medium to leak, and the rotating ring seat 111 is locked on the stepped shaft 100 by the mechanical seal structure through a nut, an abutting end face 114 is provided on the rotating ring seat 111, the lock nut is sleeved and fixed on the first stepped shaft 100a, and meanwhile, the end face of the lock nut is provided on the abutting end face 114, so that the axial movement of the rotating ring seat 111 is limited, and the sealing performance of the mechanical seal structure is better.
Meanwhile, the lock nut is connected with the sealing gasket 115 in an interference manner, so that the medium cannot leak between the stepped shaft 100 and the movable ring seat 111.
As shown in fig. 1 and 2, in addition to the above embodiment, the movable ring seat 111 is provided with a driving pin 113, and the driving pin 113 is connected to the movable ring 112.
Preferably, one end of the driving pin 113 is fixed on the movable ring seat 111, and the other end thereof is connected with the movable ring 112 in an interlocking manner. In actual operation, the movable ring seat 111 rotates along with the rotation of the step shaft 100, and the movable ring seat 111 drives the movable ring 112 to rotate through the driving pin 113.
As shown in fig. 1, 2 and 3, in the above embodiment, the push ring 170 is provided with a protrusion 171, the gland 160 is provided with a locking groove 161, and the protrusion 171 is connected with the locking groove 161 to limit the rotation of the push ring 170.
As shown in fig. 1 and fig. 2, on the basis of the above embodiment, the push ring 170 is provided with a stop pin 172, the stop pin 172 is connected with the stationary ring 122, preferably, one end of the stop pin 172 is fixedly connected with the push ring 170, and the other end is connected with the stationary ring 122 in an interlocking manner.
In actual operation, the gland 160 remains stationary with respect to the step shaft 100, and therefore the gland 160 can restrict the rotation of the push ring 170 by the connection of the locking groove 161 and the projection 171, that is, the push ring 170 also remains stationary with respect to the step shaft 100 in actual operation.
Meanwhile, one end of the stop pin 172 is fixed on the push ring 170, and the other end of the stop pin 172 is linked with the stationary ring 122, so that the stationary push ring 170 can limit the rotation of the stationary ring 122 through the stop pin 172, and finally the stationary ring 122 is kept stationary relative to the step shaft 100.
Preferably, the elastic member 180 is provided as a wave spring. Under the same parameter condition, the wave spring needs smaller installation space compared with the common spring, so that the structure of the mechanical seal is more compact and reasonable.
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.
Claims (8)
1. The utility model provides a step axle single-end face mechanical seal structure which characterized in that includes:
the movable ring assembly comprises a movable ring seat and a movable ring, and the movable ring is in linkage connection with the movable ring seat;
the static ring assembly comprises a static ring seat and a static ring, and the static ring is connected with the static ring seat;
the gland, its with quiet ring seat is connected, the gland is provided with throw-out collar and elastic component, quiet ring with the throw-out collar linkage is connected, the one end of elastic component with the gland is connected, the other end of elastic component with the throw-out collar is connected, and the elastic component passes through the throw-out collar promotes quiet ring with the rotating ring is contradicted and is connected.
2. A stepped shaft single-ended mechanical seal according to claim 1, wherein: a first special-shaped sealing ring is arranged between the static ring and the static ring seat, the inner ring surface of the first special-shaped sealing ring is in surface contact with the static ring, and the outer ring surface of the first special-shaped sealing ring is in surface contact with the static ring seat.
3. A stepped shaft single-ended mechanical seal according to claim 2, wherein: still include sealed dish, sealed dish cover is established on the gland, sealed dish with be provided with second abnormal shape sealing washer between the gland, the inner circle face of second abnormal shape sealing washer with quiet ring seat forms the face contact, the outer circle face of second abnormal shape sealing washer with sealed dish forms the face contact.
4. A stepped shaft single-ended mechanical seal according to claim 1, wherein: the movable ring seat is of a bowl-shaped structure and is provided with an abutting end face, and a sealing gasket is arranged on the abutting end face.
5. A stepped shaft single-ended mechanical seal according to claim 4, wherein: the movable ring seat is provided with a transmission pin, and the transmission pin is connected with the movable ring.
6. A stepped shaft single-ended mechanical seal according to claim 1, wherein: the push ring is provided with a protruding part, the gland is provided with a locking groove, and the protruding part is connected with the locking groove so as to limit the rotation of the push ring.
7. A stepped shaft single-ended mechanical seal according to claim 6, wherein: the push ring is provided with a stop pin, and the stop pin is connected with the stationary ring.
8. A stepped shaft single-ended mechanical seal according to claim 1, wherein: the elastic piece is a wave spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122309530.2U CN216112169U (en) | 2021-09-23 | 2021-09-23 | Step shaft single-end-face mechanical sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122309530.2U CN216112169U (en) | 2021-09-23 | 2021-09-23 | Step shaft single-end-face mechanical sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216112169U true CN216112169U (en) | 2022-03-22 |
Family
ID=80688109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122309530.2U Active CN216112169U (en) | 2021-09-23 | 2021-09-23 | Step shaft single-end-face mechanical sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216112169U (en) |
-
2021
- 2021-09-23 CN CN202122309530.2U patent/CN216112169U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Chuangwei Machinery Co.,Ltd. Assignor: NINGBO DONGLIAN MECHANICAL SEAL Co.,Ltd. Contract record no.: X2023980053451 Denomination of utility model: A stepped shaft single end mechanical seal structure Granted publication date: 20220322 License type: Common License Record date: 20231221 |
|
| EE01 | Entry into force of recordation of patent licensing contract |