CN112963537A - Self-locking stern shaft sealing device - Google Patents
Self-locking stern shaft sealing device Download PDFInfo
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- CN112963537A CN112963537A CN202110222261.8A CN202110222261A CN112963537A CN 112963537 A CN112963537 A CN 112963537A CN 202110222261 A CN202110222261 A CN 202110222261A CN 112963537 A CN112963537 A CN 112963537A
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- rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a self-locking stern shaft sealing device which comprises a stern shaft body, a front end cover, a rear gland, a sealing assembly, an adjusting mechanism and a self-locking mechanism, wherein the front end cover is arranged on the stern shaft body; according to the invention, the self-locking mechanism of the driving threaded cylinder is additionally arranged, the regular polygon insertion block is inserted into the regular polygon insertion groove at the outer end of the radial floating rod through the elastic abutting action of the self-locking spring, and the driving threaded cylinder cannot rotate at the outer end of the radial floating rod when being subjected to external force due to the insertion positioning structure of the regular polygon insertion block and the regular polygon insertion groove, so that the abutting tightness of the extrusion ring body and the sealing ring body is ensured, and the sealing abutting structure is more stable.
Description
Technical Field
The invention relates to a self-locking stern shaft sealing device.
Background
At present, in the ship industry, in order to prevent seawater and lake water from permeating into a ship body along a stern shaft tube, the stern shaft must be strictly sealed to ensure the safety of the ship, the existing sealing device for the stern shaft is generally sealed through sealing rings at a plurality of joints, but the existing sealing rings are extruded and positioned through a gland, so that a tight sealing structure is formed between the sealing rings and the stern shaft, the sealing performance of the structure is unreliable, in addition, the sealing performance of the stern shaft is affected once the gland is slightly loosened, the sealing performance is unreliable, and meanwhile, the stability of a sealing abutting structure needs to be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention solves the problems that: the self-locking stern shaft sealing device has the advantages of stable sealing abutting structure, adjustable sealing abutting degree and reliable sealing performance.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a self-locking stern shaft sealing device comprises a stern shaft body, a front end cover, a rear gland, a sealing assembly, an adjusting mechanism and a self-locking mechanism; the front end cover and the rear gland are both in annular structures; one end of the rear gland is sleeved and mounted on the outer side of the periphery of one end of the front end cover; the screw shaft body is rotatably connected to the inner parts of the front end cover and the rear gland in a penetrating manner; the sealing assembly is arranged on the periphery of the inner part of the rear gland; the sealing assembly comprises a sealing ring body, a radial floating rod, a positioning sleeve, an extrusion sleeve, a pressing elastic body, a sliding plate and an extrusion ring body; a driving groove is respectively arranged at the upper part and the lower part in the middle of the inner part of the rear gland; the middle of the driving groove is respectively provided with a radial floating rod in a radial sliding and penetrating way; the outer end of the radial floating rod extends to the outside of the rear gland, and the inner end of the radial floating rod extends to the inside of the rear gland; two sides of the inner end of the radial floating rod are respectively provided with a positioning sleeve in a sliding and abutting mode; two sealing ring bodies are respectively arranged on two sides of the interior of the rear gland; the peripheral outer side of the stern shaft body is in sealed butt joint with the peripheral inner side of the sealing ring body; the inner ends of the sealing ring bodies are respectively abutted and provided with an extrusion ring body; a sliding plate is respectively arranged at the upper part and the lower part of the inner end of the extrusion ring body; the outer end of the sliding plate is slidably clamped at the end part of the driving groove; the inner sides of the sliding plates are respectively provided with an extrusion sleeve; a pressing elastic body is sleeved and mounted between the positioning sleeve and the extrusion sleeve respectively; the pressing elastic body axially pushes the sliding plate, the sliding plate drives the extrusion ring body to extrude the periphery of the inner end of the sealing ring body, and the sealing ring body is radially and tightly pressed on the outer side of the periphery of the stern shaft body after being extruded by the extrusion ring body; the radial floating rod drives the positioning sleeve to axially extrude and press the elastic body outwards when moving radially towards the inner part of the rear gland; the outer ends of the radial floating rods are respectively provided with an adjusting mechanism; the adjusting mechanism comprises a driving threaded cylinder, a rotary clamping and connecting rod, a guide limiting rod and a sealing ring; the periphery of the outer end of the radial floating rod is provided with an external thread ring surface; the external thread ring surface of the radial floating rod is in threaded rotation connection with a driving thread cylinder; the periphery of the middle outer part of the rear gland is provided with an annular clamping groove; the outer parts of two sides of the driving threaded cylinder are respectively provided with a rotary clamping and connecting rod; the rotary clamping rod is rotatably clamped on the annular clamping groove; a sealing ring is arranged between the outer side of the periphery of the radial floating rod and the rear gland; two sides of the radial floating rod are respectively provided with a limiting sliding chute; two sides of the inner middle part of the rear gland are respectively provided with a guide limiting rod; the radial floating rod is connected to the guide limiting rod in a sliding and clamping manner through limiting sliding grooves on two sides; the outer end of the radial floating rod is provided with a regular polygon insertion groove; the middle of the driving threaded cylinder is provided with a cross-connecting channel; the self-locking mechanism comprises a drawing rod, a self-locking spring and a regular polygon insertion block; a drawing rod is slidably clamped and mounted in a penetrating channel in the middle of the driving threaded cylinder; the outer end of the pull rod extends to the outer side of the driving threaded cylinder, and the inner end of the pull rod is provided with a regular polygon insertion block; the regular polygon splicing block is spliced in the regular polygon splicing groove at the outer end of the radial floating rod; the self-locking spring is sleeved on the drawing rod and is positioned inside the driving threaded barrel; two ends of the self-locking spring respectively elastically abut against the inner wall of the driving threaded cylinder and the regular polygon insertion block.
Furthermore, two sides of the cross-connecting channel are respectively provided with a guide sliding chute; two sides of the drawing rod are respectively provided with a guide latch; the pull rod is connected to the guide sliding chutes on two sides of the cross-connecting channel in a sliding and clamping mode through the guide clamping teeth on two sides.
Furthermore, wedge-shaped driving blocks are respectively arranged on two sides of the inner end of the radial floating rod; the inner end of the positioning sleeve is provided with a wedge-shaped driven surface; two sides of the inner end of the radial floating rod are respectively abutted to a wedge-shaped driven surface of the inner end of the positioning sleeve through wedge-shaped driving blocks; and the wedge-shaped driving block drives the positioning sleeve to axially extrude outwards to press the elastic body when moving radially towards the inner part of the rear gland.
Furthermore, the periphery of the inner end of the sealing ring body is provided with an abutting wedge-shaped ring surface; the periphery of the outer end of the extrusion ring body is provided with an extrusion wedge-shaped ring surface; the extrusion ring body is pressed against the abutting wedge-shaped ring surface on the periphery of the inner end of the sealing ring body through the extrusion wedge-shaped ring surface on the periphery of the outer end.
Further, the outer end of the sliding plate is provided with a sliding clamping and connecting rod; the inner sides of two ends of the driving groove are respectively provided with an extension block; the extending blocks are respectively provided with a sliding clamping groove; the sliding plate is slidably clamped on the sliding clamping groove of the extension block through a sliding clamping rod at the outer end.
Furthermore, a front end annular folded edge is arranged on the periphery of one end of the front end cover; a rear end annular folded edge is arranged on the periphery of one end of the rear gland; the rear end annular folded edge and the front end annular folded edge are connected through a plurality of screws.
Furthermore, polytetrafluoroethylene coatings are coated in the sliding clamping grooves at the two ends of the driving groove.
The invention has the advantages of
According to the invention, the self-locking mechanism of the driving threaded cylinder is additionally arranged, the regular polygon insertion block is inserted into the regular polygon insertion groove at the outer end of the radial floating rod through the elastic abutting action of the self-locking spring, and the driving threaded cylinder cannot rotate at the outer end of the radial floating rod when being subjected to external force due to the insertion positioning structure of the regular polygon insertion block and the regular polygon insertion groove, so that the abutting tightness of the extrusion ring body and the sealing ring body is ensured, and the sealing abutting structure is more stable.
The adjusting mechanism is additionally arranged, the radial floating rod is driven to move in the driving groove in the radial direction by rotating the driving threaded barrel, when the radial floating rod moves in the radial direction towards the inner part of the rear gland, the positioning sleeve is driven to move in the axial direction and extrude the abutting elastic body, and when the abutting elastic body is extruded, the extrusion sleeve can bear the extrusion force of the abutting elastic body through the force transmission effect, so that the extrusion elastic force acting on the sliding plate is enhanced, the extrusion force of the extrusion ring body acting on the sealing ring body is improved, the sealing abutting degree of the sealing ring body and the stern shaft body is further enhanced, and the sealing abutting force can be adjusted according to the actual situation.
The invention adds a sealing component on the traditional structure, the invention respectively arranges a driving groove at the upper and lower parts in the middle of the back gland, a radial floating rod is respectively installed in the middle of the driving groove in a radial sliding and penetrating way, a pressing elastomer is respectively sleeved and installed between the positioning sleeve of the radial floating rod and the extrusion sleeve of the sliding plate, thus when the pressing elastomer axially pushes the sliding plate, the sliding plate drives the extrusion ring body to extrude the periphery of the inner end of the sealing ring body, the sealing ring body is radially pressed on the outer side of the periphery of the stern shaft body after being extruded by the extrusion ring body, thus the sealing ring body is extruded by the second weight, the sealing structure of the sealing ring body and the stern shaft body is greatly improved, in addition, the extrusion ring body can axially slide in the back gland through the sliding plate, thus the sealing ring body can be elastically extruded by the extrusion ring body when the stern shaft body is adapted to different diameters and radially expanded and contracted, the self-adaptive sealing abutting structure shape is realized, and the structural design is more flexible.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of the seal assembly of the present invention.
Fig. 3 is a partially enlarged schematic view of the present invention.
Fig. 4 is an enlarged schematic view of the adjusting mechanism of the present invention.
Fig. 5 is an enlarged schematic structural view of the self-locking mechanism of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, a self-locking stern shaft sealing device comprises a stern shaft body 5, a front end cover 1, a rear gland 2, a sealing assembly 3, an adjusting mechanism 6 and a self-locking mechanism 7; the front end cover 1 and the rear gland 2 are both in annular structures; one end of the rear gland 2 is sleeved and mounted on the outer side of the periphery of one end of the front end cover 1; the screw shaft body 5 is rotatably connected to the inner parts of the front end cover 1 and the rear gland 2 in a penetrating manner; the sealing assembly 3 is arranged on the periphery of the inner part of the rear gland 2; the sealing assembly 3 comprises a sealing ring body 32, a radial floating rod 31, a positioning sleeve 33, an extrusion sleeve 35, a pressing elastic body 34, a sliding plate 36 and an extrusion ring body 37; a driving groove 21 is respectively arranged at the upper part and the lower part of the middle part in the rear gland 2; a radial floating rod 31 is respectively installed in the middle of the driving groove 21 in a sliding and penetrating manner in the radial direction; the outer end of the radial floating rod 31 extends to the outside of the rear gland 2, and the inner end of the radial floating rod extends to the inside of the rear gland 2; two sides of the inner end of the radial floating rod 31 are respectively provided with a positioning sleeve 33 in a sliding and abutting mode; two sealing ring bodies 32 are respectively arranged on two sides of the interior of the rear gland 2; the peripheral outer side of the stern shaft body 5 is in sealing and abutting connection with the peripheral inner side of the sealing ring body 32; the inner ends of the sealing ring bodies 32 are respectively connected with and provided with an extrusion ring body 37; the upper end and the lower end of the extrusion ring body 37 are respectively provided with a sliding plate 36; the outer end of the sliding plate 36 is slidably clamped at the end part of the driving groove 21; the inner sides of the sliding plates 36 are respectively provided with an extrusion sleeve 35; a pressing elastic body 34 is sleeved and mounted between the positioning sleeve 33 and the extrusion sleeve 35 respectively; the pressing elastic body 34 axially pushes the sliding plate 36, the sliding plate 36 drives the extrusion ring body 37 to extrude the periphery of the inner end of the sealing ring body 32, and the sealing ring body 32 is radially compressed on the outer side of the periphery of the stern shaft body 5 after being extruded by the extrusion ring body 37; when the radial floating rod 31 moves radially towards the inner part of the rear gland 2, the positioning sleeve 33 is driven to extrude and press the elastic body 34 axially towards the outer side; the outer ends of the radial floating rods 31 are respectively provided with an adjusting mechanism 6; the adjusting mechanism 6 comprises a driving threaded cylinder 61, a rotary clamping rod 62, a guide limiting rod 64 and a sealing ring 65; the periphery of the outer end of the radial floating rod 31 is provided with an external thread ring surface 313; the external thread ring surface 313 of the radial floating rod 31 is in threaded rotation connection with a driving thread cylinder 61; the periphery of the middle outer part of the rear gland 2 is provided with an annular clamping groove 24; the outer parts of two sides of the driving threaded cylinder 61 are respectively provided with a rotary clamping rod 62; the rotary clamping rod 62 is rotatably clamped on the annular clamping groove 24; a sealing ring 65 is arranged between the outer side of the periphery of the radial floating rod 31 and the rear gland 2; two sides of the radial floating rod 31 are respectively provided with a limiting sliding chute 312; two sides of the middle inner part of the rear gland 2 are respectively provided with a guide limiting rod 64; the radial floating rod 31 is slidably clamped on the guide limit rod 64 through the limit sliding grooves 312 on the two sides; the outer end of the radial floating rod 31 is provided with a regular polygon inserting groove 314; the middle of the driving threaded cylinder 61 is provided with a cross-connecting channel 611; the self-locking mechanism 7 comprises a drawing rod 71, a self-locking spring 72 and a regular polygon insertion block 73; a pull rod 71 is slidably clamped and mounted in a penetrating channel 611 in the middle of the driving threaded cylinder 61; the outer end of the pull rod 71 extends to the outer side of the driving threaded cylinder 61, and the inner end of the pull rod 71 is provided with a regular polygon insertion block 73; the regular polygon plug block 73 is plugged in the regular polygon plug groove 314 at the outer end of the radial floating rod 31; the self-locking spring 72 is sleeved on the pull rod 71 and is positioned inside the driving threaded barrel 61; two ends of the self-locking spring 72 respectively elastically press between the inner wall of the driving threaded cylinder 61 and the regular polygon plug-in block 73. The regular polygon insertion groove 314 and the regular polygon insertion block 73 are matched and inserted in size to realize limiting, the regular polygon insertion groove can be a regular hexagon, a regular octagon and the like, the more the number of sides is, the smaller the rotation adjusting angle of the driving threaded cylinder 61 is when the pulling rod 71 is pulled outwards, and the more convenient the adjustment is, the higher the precision is.
As shown in fig. 1 to 5, further, two sides of the penetrating channel 611 are respectively provided with a guiding sliding groove 612; two sides of the drawing rod 71 are respectively provided with a guide latch 711; the drawing rod 71 is slidably engaged with the guide sliding grooves 612 on both sides of the cross-connecting channel 611 through the guide latch 711 on both sides. Further, two sides of the inner end of the radial floating rod 31 are respectively provided with a wedge-shaped driving block 311; the inner end of the positioning sleeve 33 is provided with a wedge-shaped driven surface 331; two sides of the inner end of the radial floating rod 31 are respectively abutted on a wedge-shaped driven surface 331 of the inner end of the positioning sleeve 33 through a wedge-shaped driving block 311; when the wedge-shaped driving block 311 moves radially towards the inside of the rear gland 2, the positioning sleeve 33 is driven to extrude and press the elastic body 34 axially towards the outer side. More preferably, the periphery of the inner end of the sealing ring body 32 is provided with an abutting wedge-shaped ring surface 321; the periphery of the outer end of the extrusion ring body 37 is provided with an extrusion wedge-shaped ring surface; the said squeezing ring 37 is pressed against the abutment wedge ring 321 around the inner end of the sealing ring 32 by the squeezing wedge ring around the outer end. Further preferably, the outer end of the sliding plate 36 is provided with a sliding clamping rod 361; the inner sides of two ends of the driving groove 21 are respectively provided with an extending block 23; the extending blocks 23 are respectively provided with a sliding clamping groove 231; the sliding plate 36 is slidably engaged with the sliding engaging groove 231 of the extension block 23 by a sliding engaging rod 361 at the outer end. Furthermore, a front end annular folded edge 11 is arranged on the periphery of one end of the front end cover 1; a rear annular folded edge 22 is arranged on the periphery of one end of the rear gland 2; the rear end annular flange 22 and the front end annular flange 11 are connected by a plurality of screws 4. Further, polytetrafluoroethylene coatings are coated in the sliding clamping grooves 231 at the two ends of the driving groove 21.
According to the invention, the self-locking mechanism of the driving threaded barrel 61 is additionally arranged, the regular polygon insertion block 73 is inserted into the regular polygon insertion groove 314 at the outer end of the radial floating rod 31 under the elastic abutting action of the self-locking spring 72, and the driving threaded barrel 61 cannot rotate at the outer end of the radial floating rod 31 when external force is applied due to the insertion positioning structure of the regular polygon insertion block 73 and the regular polygon insertion groove 314, so that the abutting tightness of the extrusion ring body 37 and the sealing ring body 32 is ensured, and the sealing abutting structure is more stable.
The adjusting mechanism 6 is additionally arranged, the radial floating rod 31 is driven to move radially in the driving groove 21 by rotating the driving threaded barrel 61, when the radial floating rod 31 moves radially towards the inside of the rear gland 2, the positioning sleeve 33 is driven to move axially and extrude the abutting elastomer 34, when the abutting elastomer 34 is extruded, the extrusion sleeve 35 can be extruded by the abutting elastomer 34 through the force transmission effect, the extrusion elastic force acting on the sliding plate 36 is enhanced, the extrusion force acting on the sealing ring body 32 by the extrusion ring body 37 is improved, the sealing abutting degree of the sealing ring body 32 and the stern shaft body 5 is further enhanced, and the sealing abutting force can be adjusted according to the actual situation.
The sealing assembly 3 is additionally arranged on the traditional structure, the driving groove 21 is respectively arranged at the upper part and the lower part in the middle of the back gland 2, the radial floating rod 31 is respectively installed in the middle of the driving groove 21 in a sliding and penetrating manner in the radial direction, the abutting elastic body 34 is respectively installed between the positioning sleeve 33 of the radial floating rod 31 and the extrusion sleeve 35 of the sliding plate 36 in a sleeved manner, so that when the abutting elastic body 34 axially pushes the sliding plate 36, the sliding plate 36 drives the extrusion ring body 37 to extrude the periphery of the inner end of the sealing ring body 32, and the sealing ring body 32 is radially compressed on the outer side of the periphery of the stern shaft body 5 after being extruded by the extrusion ring body 37, so that the sealing ring body 32 is extruded by the second weight, and the sealing structure of the sealing ring body 32 and the stern shaft body 5 is.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A self-locking stern shaft sealing device is characterized by comprising a stern shaft body, a front end cover, a rear gland, a sealing assembly, an adjusting mechanism and a self-locking mechanism; the front end cover and the rear gland are both in annular structures; one end of the rear gland is sleeved and mounted on the outer side of the periphery of one end of the front end cover; the screw shaft body is rotatably connected to the inner parts of the front end cover and the rear gland in a penetrating manner; the sealing assembly is arranged on the periphery of the inner part of the rear gland; the sealing assembly comprises a sealing ring body, a radial floating rod, a positioning sleeve, an extrusion sleeve, a pressing elastic body, a sliding plate and an extrusion ring body; a driving groove is respectively arranged at the upper part and the lower part in the middle of the inner part of the rear gland; the middle of the driving groove is respectively provided with a radial floating rod in a radial sliding and penetrating way; the outer end of the radial floating rod extends to the outside of the rear gland, and the inner end of the radial floating rod extends to the inside of the rear gland; two sides of the inner end of the radial floating rod are respectively provided with a positioning sleeve in a sliding and abutting mode; two sealing ring bodies are respectively arranged on two sides of the interior of the rear gland; the peripheral outer side of the stern shaft body is in sealed butt joint with the peripheral inner side of the sealing ring body; the inner ends of the sealing ring bodies are respectively abutted and provided with an extrusion ring body; a sliding plate is respectively arranged at the upper part and the lower part of the inner end of the extrusion ring body; the outer end of the sliding plate is slidably clamped at the end part of the driving groove; the inner sides of the sliding plates are respectively provided with an extrusion sleeve; a pressing elastic body is sleeved and mounted between the positioning sleeve and the extrusion sleeve respectively; the pressing elastic body axially pushes the sliding plate, the sliding plate drives the extrusion ring body to extrude the periphery of the inner end of the sealing ring body, and the sealing ring body is radially and tightly pressed on the outer side of the periphery of the stern shaft body after being extruded by the extrusion ring body; the radial floating rod drives the positioning sleeve to axially extrude and press the elastic body outwards when moving radially towards the inner part of the rear gland; the outer ends of the radial floating rods are respectively provided with an adjusting mechanism; the adjusting mechanism comprises a driving threaded cylinder, a rotary clamping and connecting rod, a guide limiting rod and a sealing ring; the periphery of the outer end of the radial floating rod is provided with an external thread ring surface; the external thread ring surface of the radial floating rod is in threaded rotation connection with a driving thread cylinder; the periphery of the middle outer part of the rear gland is provided with an annular clamping groove; the outer parts of two sides of the driving threaded cylinder are respectively provided with a rotary clamping and connecting rod; the rotary clamping rod is rotatably clamped on the annular clamping groove; a sealing ring is arranged between the outer side of the periphery of the radial floating rod and the rear gland; two sides of the radial floating rod are respectively provided with a limiting sliding chute; two sides of the inner middle part of the rear gland are respectively provided with a guide limiting rod; the radial floating rod is connected to the guide limiting rod in a sliding and clamping manner through limiting sliding grooves on two sides; the outer end of the radial floating rod is provided with a regular polygon insertion groove; the middle of the driving threaded cylinder is provided with a cross-connecting channel; the self-locking mechanism comprises a drawing rod, a self-locking spring and a regular polygon insertion block; a drawing rod is slidably clamped and mounted in a penetrating channel in the middle of the driving threaded cylinder; the outer end of the pull rod extends to the outer side of the driving threaded cylinder, and the inner end of the pull rod is provided with a regular polygon insertion block; the regular polygon splicing block is spliced in the regular polygon splicing groove at the outer end of the radial floating rod; the self-locking spring is sleeved on the drawing rod and is positioned inside the driving threaded barrel; two ends of the self-locking spring respectively elastically abut against the inner wall of the driving threaded cylinder and the regular polygon insertion block.
2. The self-locking stern shaft sealing device according to claim 1, wherein two sides of the cross-connecting channel are respectively provided with a guide chute; two sides of the drawing rod are respectively provided with a guide latch; the pull rod is connected to the guide sliding chutes on two sides of the cross-connecting channel in a sliding and clamping mode through the guide clamping teeth on two sides.
3. The self-locking stern shaft sealing device according to claim 1, wherein wedge-shaped driving blocks are respectively arranged on two sides of the inner end of the radial floating rod; the inner end of the positioning sleeve is provided with a wedge-shaped driven surface; two sides of the inner end of the radial floating rod are respectively abutted to a wedge-shaped driven surface of the inner end of the positioning sleeve through wedge-shaped driving blocks; and the wedge-shaped driving block drives the positioning sleeve to axially extrude outwards to press the elastic body when moving radially towards the inner part of the rear gland.
4. The self-locking stern shaft seal according to claim 1 wherein the inner end of the seal ring body is provided with an abutting wedge-shaped annulus around its periphery; the periphery of the outer end of the extrusion ring body is provided with an extrusion wedge-shaped ring surface; the extrusion ring body is pressed against the abutting wedge-shaped ring surface on the periphery of the inner end of the sealing ring body through the extrusion wedge-shaped ring surface on the periphery of the outer end.
5. The self-locking stern shaft seal according to claim 1 wherein the outer end of the sliding plate is provided with a sliding clamping rod; the inner sides of two ends of the driving groove are respectively provided with an extension block; the extending blocks are respectively provided with a sliding clamping groove; the sliding plate is slidably clamped on the sliding clamping groove of the extension block through a sliding clamping rod at the outer end.
6. The self-locking stern shaft sealing device according to claim 1, wherein a front end annular flange is arranged around one end of the front end cover; a rear end annular folded edge is arranged on the periphery of one end of the rear gland; the rear end annular folded edge and the front end annular folded edge are connected through a plurality of screws.
7. The self-locking stern shaft seal according to claim 5 wherein the sliding grooves at both ends of the driving groove are coated with Teflon.
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CN202110222261.8A CN112963537A (en) | 2021-02-28 | 2021-02-28 | Self-locking stern shaft sealing device |
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CN202110222261.8A CN112963537A (en) | 2021-02-28 | 2021-02-28 | Self-locking stern shaft sealing device |
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CN202110222261.8A Withdrawn CN112963537A (en) | 2021-02-28 | 2021-02-28 | Self-locking stern shaft sealing device |
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- 2021-02-28 CN CN202110222261.8A patent/CN112963537A/en not_active Withdrawn
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CN113356782A (en) * | 2021-06-28 | 2021-09-07 | 江苏力克石油机械有限公司 | Embedded connection type oil pipe leaking stoppage sealer |
CN113323598A (en) * | 2021-06-30 | 2021-08-31 | 江苏力克石油机械有限公司 | Locking fastening formula sucker rod anticreep ware |
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CN113895923A (en) * | 2021-10-27 | 2022-01-07 | 领先科技(东台)有限公司 | Multi-point butt interlocking type motor turnover mechanism |
CN113926897A (en) * | 2021-10-27 | 2022-01-14 | 领先科技(东台)有限公司 | Wheel-changing pressing type motor top pressing forming mechanism |
CN113895923B (en) * | 2021-10-27 | 2023-10-24 | 领先科技(东台)有限公司 | Multi-point abutting interlocking type motor turnover mechanism |
CN113926897B (en) * | 2021-10-27 | 2024-04-12 | 领先科技(东台)有限公司 | Alternating pressing type motor pressing forming mechanism |
CN113839508A (en) * | 2021-10-29 | 2021-12-24 | 领先科技(东台)有限公司 | Stable positioning type motor |
CN113839508B (en) * | 2021-10-29 | 2024-06-18 | 领先科技(东台)有限公司 | Stable positioning motor |
CN114165169A (en) * | 2021-12-10 | 2022-03-11 | 江苏和信石油机械有限公司 | Interlocking type radial adjustable drill rod for rescue |
CN114165169B (en) * | 2021-12-10 | 2023-06-27 | 江苏和信石油机械有限公司 | Interlocking type radial adjustable drill rod for rescue |
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