CN111268082A - Ship propulsion device - Google Patents
Ship propulsion device Download PDFInfo
- Publication number
- CN111268082A CN111268082A CN202010073560.5A CN202010073560A CN111268082A CN 111268082 A CN111268082 A CN 111268082A CN 202010073560 A CN202010073560 A CN 202010073560A CN 111268082 A CN111268082 A CN 111268082A
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- China
- Prior art keywords
- sealing
- bushing
- cylindrical groove
- ring
- driving shaft
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
- B63H2023/327—Sealings specially adapted for propeller shafts or stern tubes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The utility model provides a ship propulsion device, which belongs to the technical field of ship propulsion. The driving shaft is inserted into the driving main body, a bushing in the sealing structure is sleeved on the driving shaft and is in sealing fit with the driving shaft, at least two sealing rings are superposed in a cylindrical groove of the sealing seat coaxial with the bushing, and one sealing ring with the minimum distance from the bottom surface of the cylindrical groove is sealed with the outer wall of the bushing. The driving shaft and the driving main body are sealed by the bushing, the sealing seat and at least two sealing rings. The minimum distance between the sealing ring adjacent to the first sealing ring and the bottom surface of the cylindrical groove is larger than the minimum distance between the end surface of one end, close to the cylindrical groove, of the bushing and the bottom surface of the cylindrical groove, after the service life of the first sealing ring is over, the bushing is pushed to the driving main body, a good sealing ring adjacent to the first sealing ring is sealed with the outer wall of the bushing, sealing between the bushing and the sealing seat is completed, the driving shaft does not need to be detached from the driving main body, and maintenance operation is simplified.
Description
Technical Field
The present disclosure relates to a ship propulsion technology, and more particularly to a ship propulsion device.
Background
A marine propulsion device is a device for propelling a ship in water. The ship propulsion device at least comprises a driving main body, a driving shaft, a sealing structure and a propeller, wherein one end of the driving shaft is inserted into a jack on the driving main body, the other end of the driving shaft is connected with the propeller, and the sealing structure is arranged between the driving shaft and the driving main body for sealing. Generally, the sealing structure at least comprises a sealing ring coaxially sleeved on the driving shaft, and the sealing ring seals the driving shaft and the insertion hole so as to prevent water flow from entering the driving main body.
However, in the sealing structure, the service life of the sealing ring is limited, the driving shaft needs to be detached from the driving main body after the sealing ring is damaged, the driving shaft is installed on the driving main body after the replaced sealing ring is installed on the driving shaft, and the maintenance operation of the sealing structure in the ship propulsion device is complicated.
Disclosure of Invention
The disclosed embodiment provides a ship propulsion device, which can simplify maintenance operation when a sealing structure of the ship propulsion device is maintained. The technical scheme is as follows:
the embodiment of the disclosure provides a ship propulsion device, which comprises a driving main body, a driving shaft, a sealing structure and a propeller, wherein one end of the driving shaft is inserted into a jack of the driving main body, the other end of the driving shaft is connected with the propeller, the sealing structure seals the driving shaft and the driving main body,
the sealing structure comprises a bushing, a sealing seat and at least two sealing rings, the bushing is coaxially sleeved on the driving shaft and is in sealing fit with the driving shaft, the sealing seat is sleeved on the bushing and is in sealing connection with the driving main body, a cylindrical groove coaxial with the bushing is arranged on the sealing seat, the at least two sealing rings are superposed in the cylindrical groove, the at least two sealing rings are coaxially arranged with the cylindrical groove, and the sealing ring with the minimum distance from the bottom surface of the cylindrical groove is sealed with the outer wall of the bushing,
the sealing ring with the minimum distance of the bottom surface of the cylindrical groove is a first sealing ring, and the minimum distance between the sealing ring adjacent to the first sealing ring and the bottom surface of the cylindrical groove is greater than the minimum distance between the end surface of one end, close to the cylindrical groove, of the bushing and the bottom surface of the cylindrical groove.
Optionally, one end of the bushing, which is far away from the driving body, extends out of the sealing seat, and a threaded through hole is formed in the radial direction of one end of the bushing, which is far away from the driving body, and a set screw is connected in the threaded through hole in a threaded manner.
Optionally, the total length of the at least two sealing rings in the axial direction of the bushing is less than the length of the bushing.
Optionally, a sealed space is enclosed among the insertion hole, the driving shaft, the bushing, the at least two sealing rings and the sealing seat, and the sealed space is filled with pressure oil.
Optionally, the sealing structure further comprises a gravity oil tank, the gravity oil tank is communicated with the sealing space, and the minimum height of the gravity oil tank is higher than the maximum height of the sealing seat.
Optionally, the sealing structure further comprises a support ring, the support ring is coaxially arranged between every two adjacent sealing rings, and the inner diameter of the support ring is larger than the outer diameter of the bushing.
Optionally, the sealing structure further comprises an annular cover, the annular cover is detachably connected with the sealing seat, the annular cover is arranged on one side, away from the bottom surface of the cylindrical groove, of the at least two sealing rings, and the annular cover abuts against one sealing ring which is farthest away from the bottom surface of the cylindrical groove.
Optionally, the sealing structure further comprises a dustproof ring, the dustproof ring is coaxially sleeved on the bushing, and the dustproof ring abuts against one surface, far away from the cylindrical groove, of the sealing seat.
Optionally, the inner wall of the dust ring is provided with a coaxial annular protrusion, and the outer wall of the liner is provided with an annular groove corresponding to the annular protrusion.
Optionally, the bushing has a chamfer on an outer wall proximate an end of the cylindrical slot.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise: in the ship propelling device, a driving shaft is inserted into a driving main body, a bushing in a sealing structure is sleeved on the driving shaft and is in sealing fit with the driving shaft, at least two sealing rings are superposed in a cylindrical groove of a sealing seat coaxial with the bushing, and one sealing ring with the minimum distance from the bottom surface of the cylindrical groove is sealed with the outer wall of the bushing to complete the sealing between the bushing and the sealing seat, and the sealing seat is also in sealing connection with the driving main body. The driving shaft and the driving main body are sealed through the bushing, the sealing seat and at least two sealing rings. And because the minimum distance between one sealing ring adjacent to the first sealing ring and the bottom surface of the cylindrical groove is larger than the minimum distance between the end surface of one end of the bushing close to the cylindrical groove and the bottom surface of the cylindrical groove, so that the other of the at least two sealing rings other than the first sealing ring is not in sealing contact with the bushing, the one sealing ring (i.e. the first sealing ring) with the smallest distance from the bottom surface of the cylindrical groove directly plays a sealing role, so after the service life of the first sealing ring expires and leakage occurs between the bushing and the sealing seat, the bushing can be pushed towards the drive body in the axial direction of the bushing so that a perfect sealing ring adjacent to the first sealing ring can seal with the outer wall of the bushing, completing the sealing between the bushing and the sealing seat, without the need to remove the drive shaft from the drive body, the maintenance operation when the seal structure of the marine propulsion device is maintained is simplified.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a simplified schematic illustration of a marine propulsion unit provided by an embodiment of the present disclosure;
fig. 2 is a simplified structural schematic diagram of another state of the marine propulsion device provided by the embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a simplified schematic structural diagram of a ship propulsion device according to an embodiment of the present disclosure, and as shown in fig. 1, the ship propulsion device includes a driving body 1, a driving shaft 2, a sealing structure 3, and a propeller 4. One end of the driving shaft 2 is inserted into an insertion hole 11 of the driving body 1, the other end of the driving shaft 2 is connected with the propeller 4, and the sealing structure 3 seals the driving shaft 2 and the driving body 1.
The sealing structure 3 comprises a bushing 31, a sealing seat 32 and at least two sealing rings 33, the bushing 31 is coaxially sleeved on the driving shaft 2 and is in sealing fit with the driving shaft 2, the sealing seat 32 is sleeved on the bushing 31, the sealing seat 32 is provided with a cylindrical groove 321 coaxial with the bushing 31, the at least two sealing rings 33 are superposed in the cylindrical groove 321, the at least two sealing rings 33 are all coaxially arranged with the cylindrical groove 321, and one sealing ring 33 with the minimum distance from the bottom surface 321a of the cylindrical groove 321 is sealed with the outer wall of the bushing 31.
The first seal ring 33 that is the smallest distance from the bottom 321a of the cylindrical groove 321 is the first seal ring, and the smallest distance D between the bottom 321a of the cylindrical groove 321 and the first seal ring 33 adjacent to the first seal ring is greater than the smallest distance D between the end surface of the end of the bushing 31 near the cylindrical groove 321 and the bottom 321a of the cylindrical groove 321.
In the ship propulsion device, a driving shaft 2 is inserted into a driving body 1, a bushing 31 in a sealing structure 3 is sleeved on the driving shaft 2 and is in sealing fit with the driving shaft 2, at least two sealing rings 33 are overlapped in a cylindrical groove 321 of a sealing seat 32 coaxial with the bushing 31, one sealing ring 33 with the smallest distance with the bottom surface 321a of the cylindrical groove 321 is sealed with the outer wall of the bushing 31, the sealing between the bushing 31 and the sealing seat 32 is completed, and the sealing seat 32 is also in sealing connection with the driving body 1. The driving shaft 2 and the driving body 1 are sealed by a bushing 31, a sealing seat 32 and at least two sealing rings 33. And since the minimum distance D between one of the seal rings 33 adjacent to the first seal ring and the bottom 321a of the cylindrical groove 321 is greater than the minimum distance D between the end surface of the end of the bushing 31 close to the cylindrical groove 321 and the bottom 321a of the cylindrical groove 321, the other seal rings 33 of the at least two seal rings 33 except the first seal ring do not make sealing contact with the bushing 31, and the seal ring 33 (i.e. the first seal ring) with the minimum distance from the bottom 321a of the cylindrical groove 321 directly performs a sealing function, after the first seal ring has expired and leakage occurs between the bushing 31 and the seal seat 32, the bushing 31 can be pushed toward the driving body 1 along the axial direction of the bushing 31, so that one intact seal ring 33 adjacent to the first seal ring can be sealed with the outer wall of the bushing 31, and the seal between the bushing 31 and the seal seat 32 is completed without removing the driving shaft 2 from the driving body 1, the maintenance operation when the sealing structure 3 of the ship propulsion device is maintained is simplified.
In the sealing structure 3, at least two of the seal rings 33 may have a function of partially sealing the seal ring 33 having a lifetime expired although the seal ring 33 has a leakage, and may be fitted with the seal ring 33 perfectly sealed with the bush 31, so that the sealing property between the bush 31 and the seal holder 32 may be enhanced.
It should be noted that the bushing 31 and the driving shaft 2 may be in an interference fit.
The connection between the bush 31 and the drive shaft 2 is relatively tight, but when it is necessary to adjust the position of the bush 31 relative to the drive shaft 2, the position of the bush 31 relative to the drive shaft 2 may be adjusted by a structure such as a tool.
It should be noted that the outer wall of the sealing ring 33 and the side wall of the cylindrical groove 321 may be in interference fit. To ensure a stable mounting of the sealing ring 33.
Alternatively, at least two of the sealing rings 33 may be lip-shaped sealing rings, and the lips of the lip-shaped sealing rings face in the direction of the drive body 1.
At least two sealing rings 33 are lip-shaped sealing rings, and the lip of the lip-shaped sealing ring has a good sealing effect towards the direction of the driving main body 1.
In the embodiment provided by the present disclosure, the number of the sealing rings 33 may be 2, but in other implementations provided by the present disclosure, the number of the sealing rings 33 may also be 3 or 4 or other numbers, which is not limited by the present disclosure.
As shown in fig. 1, one end of the bushing 31 away from the driving body 1 extends out of the sealing seat 32, and a threaded through hole 311 is formed in the radial direction of one end of the bushing 31 away from the driving body 1, and a set screw 34 is screwed into the threaded through hole 311.
The end of the bush 31 remote from the driving body 1 extends out of the sealing seat 32, which facilitates the pushing and adjusting of the position of the bush 31. And the radial thread through hole 311 at one end of the bush 31 far away from the driving body 1 is matched with the set screw 34, the set screw 34 can be rotated until the set screw 34 is abutted against the outer wall of the driving shaft 2 in the bush 31, and the friction force exerted on the driving shaft 2 by the set screw 34 can keep the axial position of the bush 31 relative to the driving shaft 2, so that the position of the bush 31 is prevented from being frequently moved. When the position of the bush 31 needs to be adjusted to match the bush 31 with the intact sealing ring 33, the set screw 34 may be removed, and the bush 31 and the driving shaft 2 may be fixed by the set screw 34 after the bush 31 is pushed. The bush 31 is easily attached and detached and adjusted.
When the bushing 31 is provided with the set screw 34, the fit between the bushing 31 and the driving shaft 2 may be a clearance fit, the bushing 31 itself may rotate relative to the driving shaft 2, and the set screw 34 fixes the bushing 31 and the driving shaft 2.
When the fit between the bush 31 and the driving shaft 2 is a clearance fit and the bush 31 and the driving shaft 2 are fixedly connected by the set screw 34, the position of the bush 31 is conveniently adjusted.
Optionally, when the fit between the lining sleeve 31 and the drive shaft 2 is a clearance fit, an annular sealing ring 35 is arranged between the lining sleeve 31 and the drive shaft 2, and the annular sealing ring 35 seals the inner wall of the lining sleeve 31 and the outer wall of the drive shaft 2. Ensuring the tightness between the drive shaft 2 and the bush 31.
Illustratively, the total length of the at least two seal rings 33 in the axial direction of the bush 31 may be smaller than the length of the bush 31.
The total length of at least two sealing rings 33 in the axial direction of the bushing 31 is smaller than the length of the bushing 31, and when the bushing 31 is adjusted to seal with one sealing ring 33 farthest from the bottom 321a of the cylindrical groove 321, the bushing 31 can be in sealing contact with all the sealing rings 33 in the cylindrical groove 321, and the sealing effect is good.
As shown in fig. 1, the outer wall of the bush 31 near one end of the cylindrical groove 321 has a chamfer 312.
The outer wall of the end of the bush 31 close to the cylindrical groove 321 has a chamfer 312, so that when the bush 31 is pushed toward the driving body 1 along the axial direction of the bush 31, the bush 31 smoothly enters the sealing ring 33 adjacent to the first sealing ring, the sealing ring 33 is not damaged, and the stable use of the sealing ring 33 is ensured.
As shown in fig. 1, a sealed space a may be enclosed among the insertion hole 11, the driving shaft 2, the bushing 31, the at least two sealing rings 33, and the sealing seat 32, and the sealed space a may be filled with pressure oil.
A sealing space A is defined between the jack 11, the driving shaft 2, the bushing 31, the at least two sealing rings 33 and the sealing seat 32, pressure oil is filled in the sealing space A, the pressure oil in the sealing space A can apply certain pressure to the sealing ring 33 sealed with the outer wall of the bushing 31, and the pressure from one side of the propeller 4, which is received by the sealing ring 33, can be offset by the pressure, so that the sealing ring 33 can work in an environment with stable pressure, and the accelerated damage of the sealing ring 33 is avoided. When the seal ring 33 is a lip seal, the pressure oil can also press the lip portion of the seal ring 33 against the bush 31, thereby improving the sealing effect of the lip seal.
As shown in fig. 1, the seal structure 3 may further include a gravity oil tank 36, the gravity oil tank 36 communicating with the seal space a, and a minimum height of the gravity oil tank 36 is higher than a maximum height of the seal holder 32.
The gravity oil tank 36 can supplement pressure oil to the sealed space a in time to ensure that the sealed space a is filled with the pressure oil.
As shown in fig. 1, the seal holder 32 may have a drain hole 322 communicating with the seal space a, and a plug 323 is provided in the drain hole 322.
The oil discharge hole 322 can facilitate oil to be discharged, when the bushing 31 needs to be adjusted, the plug 323 can be detached, when the bushing 31 is pushed to the driving body 1, oil can be pushed into the oil discharge hole 322, and after the position of the bushing 31 is adjusted, the plug 323 is installed on the oil discharge hole 322, so that resistance to the bushing 31 during position adjustment is reduced.
As shown in fig. 1, the sealing structure 3 further includes a support ring 37, and the support ring 37 is coaxially disposed between two adjacent sealing rings 33, and an inner diameter of the support ring 37 is larger than an outer diameter of the bushing 31.
The support ring 37 can support the seal ring 33 to ensure the stable operation of the seal ring 33, and the inner diameter of the support ring 37 is larger than the outer diameter of the bushing 31, so that the movement of the bushing 31 is not affected.
As shown in fig. 1, the sealing structure 3 further includes an annular cover 38, the annular cover 38 is detachably connected to the sealing seat 32, the annular cover 38 is disposed on a side of at least two sealing rings 33 away from the bottom 321a of the cylindrical groove 321, and the annular cover 38 abuts against one sealing ring 33 farthest from the bottom 321a of the cylindrical groove 321.
The annular cover 38 can support the one of the seal rings 33 farthest from the bottom 321a of the cylindrical groove 321, and ensure that the one of the seal rings 33 farthest from the bottom 321a of the cylindrical groove 321 can be used stably.
On the basis that the end of the bushing 31 far away from the driving body 1 extends out of the sealing seat 32, the sealing structure 3 may further include a dust ring 39, the dust ring 39 is coaxially sleeved on the bushing 31, and the dust ring 39 abuts against a surface of the sealing seat 32 far away from the cylindrical groove 321.
The dust ring 39 can prevent dust from entering between the bushing 31 and the sealing seat 32, ensure that the sealing ring 33 is used in a dust-free environment, and prevent the sealing ring 33 from being aged due to the influence of dust impurities.
As shown in fig. 1, the inner wall of the dust ring 39 may have a coaxial annular protrusion 391, and the outer wall of the bush 31 may have an annular groove 313 corresponding to the annular protrusion 391.
The inner wall of the dust ring 39 is provided with a coaxial annular protrusion 391, the outer wall of the lining 31 is provided with an annular groove 313 corresponding to the annular protrusion 391, and the dust ring 39 can be fixed with the lining 31 more tightly, so that the dust-proof effect is ensured.
As shown in fig. 1, the outer wall of the bush 31 has a plurality of annular grooves 313 arranged at equal intervals in the axial direction of the bush 31.
The plurality of annular grooves 313 arranged at equal intervals can ensure that the dustproof ring 39 can be installed on the corresponding annular groove 313 after the position of the bushing 31 relative to the driving shaft 2 is adjusted, and the dustproof effect is ensured.
As shown in fig. 1, the driving shaft 2 may have a limit shoulder 21 for abutting against an end surface of the bushing 31 near one end of the driving body 1.
When the position of the bush 31 is adjusted until the bush 31 seals with the one seal ring 33 farthest from the bottom 321a of the cylindrical groove 321, the end surface of the bush 31 near the end of the driving body 1 may abut against the stopper shoulder 21, and the stopper shoulder stops the bush 31, so that the bush 31 does not continue to be pushed in the axial direction.
As shown in fig. 1, the sealing seat 32 and the drive body 1 may be sealed by an annular sealing ring 35. Ensuring the tightness between the sealing seat 32 and the drive body 1.
Fig. 2 is a simplified structural schematic diagram of another state of the boat propulsion device according to the embodiment of the present disclosure, as shown in fig. 2, in which the seal ring 33 adjacent to the first seal ring is sealed with the bush 31, and the bush 31 is pushed toward the driving body 1 by a part of the distance from the state shown in fig. 1.
Before pushing the bush 31, the axial thickness of the seal ring 33 may be measured, and the bush 31 is pushed by the axial thickness of one seal ring 33, so that the bush 31 can be sealed with another intact seal ring 33.
The above description is meant to be illustrative of the principles of the present disclosure and not to be taken in a limiting sense, and any modifications, equivalents, improvements and the like that are within the spirit and scope of the present disclosure are intended to be included therein.
Claims (10)
1. A ship propulsion device comprises a driving main body (1), a driving shaft (2), a sealing structure (3) and a propeller (4), wherein one end of the driving shaft (2) is inserted into an insertion hole (11) formed in the driving main body (1), the other end of the driving shaft (2) is connected with the propeller (4), the driving shaft (2) and the driving main body (1) are sealed by the sealing structure (3),
the sealing structure (3) comprises a bushing (31), a sealing seat (32) and at least two sealing rings (33), the bushing (31) is coaxially sleeved on the driving shaft (2) and is in sealing fit with the driving shaft (2), the sealing seat (32) is sleeved on the bushing (31), the sealing seat (32) is in sealing connection with the driving main body (1), a cylindrical groove (321) coaxial with the bushing (31) is formed in the sealing seat (32), the at least two sealing rings (33) are overlapped in the cylindrical groove (321), the at least two sealing rings (33) are coaxially arranged with the cylindrical groove (321), one sealing ring (33) with the smallest distance from the bottom surface (321a) of the cylindrical groove (321) is sealed with the outer wall of the bushing (31),
the sealing ring (33) with the smallest distance to the bottom surface (321a) of the cylindrical groove (321) is a first sealing ring (33), and the smallest distance (D) between the sealing ring (33) adjacent to the first sealing ring (33) and the bottom surface (321a) of the cylindrical groove (321) is larger than the smallest distance (D) between the end surface of one end, close to the cylindrical groove (321), of the bushing (31) and the bottom surface (321a) of the cylindrical groove (321).
2. Marine propulsion arrangement according to claim 1, characterised in that the end of the bushing (31) remote from the drive body (1) protrudes beyond the sealing seat (32), the end of the bushing (31) remote from the drive body (1) having a threaded through hole (311) in the radial direction, the threaded through hole (311) being internally threaded with a set screw (34).
3. Marine propulsion arrangement according to claim 1, characterised in that the total length of the at least two sealing rings (33) in the axial direction of the bushing (31) is smaller than the length of the bushing (31).
4. A ship propulsion device according to any one of claims 1-3, characterised in that a sealed space (a) is enclosed between the socket (11), the drive shaft (2), the bushing (31), the at least two sealing rings (33) and the sealing seat (32), the sealed space (a) being filled with pressure oil.
5. Marine propulsion arrangement according to claim 4, characterised in that the sealing structure (3) further comprises a gravity tank (36), the gravity tank (36) communicating with the sealing space (A), the minimum height of the gravity tank (36) being higher than the maximum height of the sealing seat (32).
6. Marine propulsion arrangement according to any one of claims 1-3, characterised in that the sealing structure (3) further comprises a support ring (37), the support ring (37) being coaxially arranged between each two adjacent sealing rings (33), the inner diameter of the support ring (37) being larger than the outer diameter of the bushing (31).
7. Marine propulsion arrangement according to any one of claims 1-3, characterised in that the sealing structure (3) further comprises an annular cover (38), the annular cover (38) being detachably connected to the sealing seat (32), the annular cover (38) being arranged on the side of the at least two sealing rings (33) facing away from the bottom surface (321a) of the cylindrical groove (321), the annular cover (38) abutting against the one sealing ring (33) which is furthest away from the bottom surface (321a) of the cylindrical groove (321).
8. Marine propulsion arrangement according to claim 2, characterised in that the sealing structure (3) further comprises a dust ring (39), the dust ring (39) is coaxially sleeved on the bushing (31), and the dust ring (39) abuts against a face of the sealing seat (32) remote from the cylindrical groove (321).
9. Marine propulsion arrangement according to claim 8, characterised in that the dust ring (39) has a coaxial annular protrusion (391) on its inner wall and the bushing (31) has an annular groove (313) on its outer wall corresponding to the annular protrusion (391).
10. A ship propulsion device according to any one of claims 1-3, characterised in that the outer wall of the bushing (31) near one end of the cylindrical groove (321) has a chamfer (312).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073560.5A CN111268082A (en) | 2020-01-22 | 2020-01-22 | Ship propulsion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073560.5A CN111268082A (en) | 2020-01-22 | 2020-01-22 | Ship propulsion device |
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| Publication Number | Publication Date |
|---|---|
| CN111268082A true CN111268082A (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010073560.5A Pending CN111268082A (en) | 2020-01-22 | 2020-01-22 | Ship propulsion device |
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| CN (1) | CN111268082A (en) |
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| CN106628092A (en) * | 2017-03-07 | 2017-05-10 | 合肥倍豪海洋装备技术有限公司 | Sealing system for full-rotary steering oar |
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|---|---|---|---|---|
| US3773336A (en) * | 1970-06-10 | 1973-11-20 | Howaldtswerke Deutsche Werft | Seals for rotatable members |
| US4008897A (en) * | 1973-09-28 | 1977-02-22 | Howaldtswerke-Deutsche Werft Aktiengesellschaft Hamburg Und Kiel | Seals for rotating shafts, especially for stern tube seals for ships |
| US4174672A (en) * | 1976-12-20 | 1979-11-20 | Cox James H | Ship's propeller shaft sealing assembly |
| US6152454A (en) * | 1995-12-21 | 2000-11-28 | Eurocopter | Sealing device for rotating shaft |
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Application publication date: 20200612 |