CN111268082A - Ship propulsion device - Google Patents

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

ship propulsion

technical field

The present disclosure relates to the technical field of ship propulsion, in particular to a ship propulsion device.

Background technique

Ship propulsion is a device used to propel a ship in water. The ship propulsion device at least includes a driving main body, a driving shaft, a sealing structure and a propeller. One end of the driving shaft is inserted into a socket on the driving main body, the other end of the driving shaft is connected to the propeller, and a sealing structure is installed between the driving shaft and the driving main body for sealing. Usually, the sealing structure includes at least a sealing ring coaxially sleeved on the driving shaft, and the sealing ring seals the driving shaft and the insertion hole to prevent water from entering the inside of the driving body.

However, in this sealing structure, the service life of the sealing ring is limited. After the sealing ring is damaged, the drive shaft needs to be removed from the driving body. After installing the replaced sealing ring on the driving shaft, the driving shaft is installed on the driving body. The maintenance operation of the sealing structure in the propulsion device is cumbersome.

SUMMARY OF THE INVENTION

The embodiments of the present disclosure provide a marine propulsion device, which can simplify the maintenance operation when repairing the sealing structure of the marine propulsion device. The technical solution is as follows:

An embodiment of the present disclosure provides a marine propulsion device, the marine propulsion device includes a driving main body, a driving shaft, a sealing structure and a propeller, one end of the driving shaft is inserted into a socket of the driving main body, and the The other end of the drive shaft is connected to the propeller, the sealing structure seals the drive shaft and the drive main body,

The sealing structure includes a bushing, a sealing seat and at least two sealing rings, the bushing is coaxially sleeved on the drive shaft and is in sealing cooperation with the driving shaft, and the sealing seat is sleeved on the bushing on the sleeve, the sealing seat is sealingly connected with the driving main body, the sealing seat has a cylindrical groove coaxial with the bushing, and the at least two sealing rings are stacked in the cylindrical groove, The at least two sealing rings are arranged coaxially with the cylindrical groove, and the sealing ring with the smallest distance from the bottom surface of the cylindrical groove is sealed with the outer wall of the bushing,

The one sealing ring with the smallest distance from the bottom surface of the cylindrical groove is the first sealing ring, and the smallest distance between the sealing ring adjacent to the first sealing ring and the bottom surface of the cylindrical groove is the first sealing ring. The distance is greater than the minimum distance between the end surface of the bushing near one end of the cylindrical groove and the bottom surface of the cylindrical groove.

Optionally, one end of the bushing away from the driving main body protrudes from the sealing seat, the end of the bushing away from the driving main body has a threaded through hole in the radial direction, and the threaded through hole is internally threadedly connected with a threaded through hole. Set screws.

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 sealing space is enclosed between the insertion hole, the driving shaft, the bushing, the at least two sealing rings and the sealing seat, and the sealing space is filled with pressure oil.

Optionally, the sealing structure further includes 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 includes a support ring, the support ring is coaxially disposed between two adjacent seal rings, and the inner diameter of the support ring is larger than the outer diameter of the bushing.

Optionally, the sealing structure further includes an annular cover, the annular cover is detachably connected to the sealing seat, and the annular cover is disposed on the side of the at least two sealing rings away from the bottom surface of the cylindrical groove , the annular cover abuts against the sealing ring farthest from the bottom surface of the cylindrical groove.

Optionally, the sealing structure further includes a dust ring, the dust ring is coaxially sleeved on the bushing, and the dust ring is in contact with the side of the sealing seat away from the cylindrical groove .

Optionally, the inner wall of the dust ring has a coaxial annular protrusion, and the outer wall of the bushing has an annular groove corresponding to the annular protrusion.

Optionally, an outer wall of one end of the bushing close to the cylindrical groove has a chamfer.

The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure at least include: in the marine propulsion device, the drive shaft is inserted into the drive main body, the bushing in the sealing structure is sleeved on the drive shaft and is in sealing cooperation with the drive shaft, and the seal seat is connected with the bushing. At least two sealing rings are stacked in the coaxial cylindrical groove of the sleeve, and the sealing ring with the smallest 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 Sealed connection with the drive body. A bushing, a sealing seat and at least two sealing rings are used for sealing between the driving shaft and the driving body. And because the minimum distance between a 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 the bushing near one end of the cylindrical groove and the bottom surface of the cylindrical groove, at least The other sealing rings except the first sealing ring among the two sealing rings are not in sealing contact with the bushing, and the sealing ring with the smallest distance from the bottom surface of the cylindrical groove (ie the first sealing ring) directly plays a sealing role, Then, after the service life of the first sealing ring expires and there is leakage between the bushing and the sealing seat, the bushing can be pushed toward the driving body along the axial direction of the bushing, so that a good seal adjacent to the first sealing ring The sealing ring can be sealed with the outer wall of the bushing to complete the sealing between the bushing and the sealing seat without removing the drive shaft from the driving main body, which simplifies the maintenance operation when repairing the sealing structure of the marine propulsion device.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a simplified structural schematic diagram of a ship propulsion device provided by an embodiment of the present disclosure;

FIG. 2 is a simplified structural schematic diagram of another state of the ship propulsion device provided by the embodiment of the present disclosure.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

FIG. 1 is a simplified schematic structural diagram of a marine propulsion device provided by an embodiment of the present disclosure. As shown in FIG. 1 , the marine propulsion device includes a driving main body 1 , a driving shaft 2 , a sealing structure 3 and a propeller 4 . One end of the drive shaft 2 is inserted into the insertion hole 11 of the drive body 1 , the other end of the drive shaft 2 is connected to the propeller 4 , and the sealing structure 3 seals the drive shaft 2 and the drive body 1 .

The sealing structure 3 includes a bushing 31 , a sealing seat 32 and at least two sealing rings 33 , the bushing 31 is coaxially sleeved on the drive shaft 2 and is in sealing cooperation with the driving shaft 2 , the sealing seat 32 is sleeved on the bushing 31 , The sealing seat 32 has a cylindrical groove 321 coaxial with the bushing 31, at least two sealing rings 33 are stacked in the cylindrical groove 321, and at least two sealing rings 33 are arranged coaxially with the cylindrical groove 321, The sealing ring 33 with the smallest distance from the bottom surface 321 a of the groove 321 is sealed with the outer wall of the bushing 31 .

The sealing ring 33 with the smallest distance from the bottom surface 321a of the cylindrical groove 321 is the first sealing ring, and the minimum distance D between the sealing ring 33 adjacent to the first sealing ring and the bottom surface 321a of the cylindrical groove 321 is greater than The minimum distance d between the end surface of the bushing 31 close to one end of the cylindrical groove 321 and the bottom surface 321 a of the cylindrical groove 321 .

In the marine propulsion device, the drive shaft 2 is inserted into the drive body 1, the bushing 31 in the sealing structure 3 is sleeved on the drive shaft 2 and is sealingly matched with the drive shaft 2, and the seal seat 32 is in the cylindrical groove coaxial with the bushing 31. At least two sealing rings 33 are stacked in the 321, and the 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 to complete the sealing between the bushing 31 and the sealing seat 32, and the sealing seat 32 is also sealingly connected to the drive body 1 . The sealing between the drive shaft 2 and the drive body 1 is completed by the bushing 31 , the sealing seat 32 and at least two sealing rings 33 . And because the minimum distance D between a sealing ring 33 adjacent to the first sealing ring and the bottom surface 321a of the cylindrical groove 321 is greater than the end surface of the bushing 31 close to one end of the cylindrical groove 321 and the bottom surface 321a of the cylindrical groove 321 The minimum distance d between the at least two sealing rings 33 except the first sealing ring 33 is not in sealing contact with the bushing 31, and the one with the smallest distance from the bottom surface 321a of the cylindrical groove 321 is sealed The ring 33 (that is, the first sealing ring) directly plays a sealing role, then after the leakage between the bushing 31 and the sealing seat 32 occurs after the service life of the first sealing ring expires, the bushing can be removed along the axial direction of the bushing 31 The sleeve 31 is pushed toward the driving body 1, so that a good sealing ring 33 adjacent to the first sealing ring can be sealed with the outer wall of the bushing 31, and the sealing between the bushing 31 and the sealing seat 32 is completed, without the need for the driving The shaft 2 is removed from the drive body 1, which simplifies the maintenance operation when the sealing structure 3 of the marine propulsion device is repaired.

And in this sealing structure 3, among at least two sealing rings 33, although the sealing ring 33 after the service life expires has leakage, it can still play a role of partial sealing, and the sealing ring that is well sealed with the bushing 31. 33 is matched, and the sealing performance between the bushing 31 and the sealing seat 32 can also be strengthened.

It should be noted that the bushing 31 and the drive shaft 2 may be an interference fit.

The connection between the bushing 31 and the driving shaft 2 is relatively tight, but when the position of the bushing 31 relative to the driving shaft 2 needs to be adjusted, the position of the bushing 31 relative to the driving shaft 2 can also 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 an interference fit. In order to ensure the stable installation of the sealing ring 33 .

Optionally, at least two sealing rings 33 can be lip-shaped sealing rings, and the lips of the lip-shaped sealing rings face the direction of the driving body 1 .

At least two sealing rings 33 are both lip-shaped sealing rings, and the lip of the lip-shaped sealing ring has a better sealing effect in the direction of the driving body 1 .

In the embodiment provided by the present disclosure, the number of the sealing rings 33 may be 2, but in other implementation manners provided by the present disclosure, the number of the sealing rings 33 may also be 3 or 4 or other numbers. There is no restriction on this publicly.

As shown in FIG. 1 , one end of the bushing 31 away from the driving main body 1 protrudes from the sealing seat 32 , the end of the bushing 31 away from the driving main body 1 has a threaded through hole 311 in the radial direction, and the threaded through hole 311 is threadedly connected with a set screw 34.

One end of the bushing 31 away from the driving main body 1 protrudes from the sealing seat 32 , which can facilitate the pushing and adjustment of the position of the bushing 31 . And the threaded through hole 311 in the radial direction of the end of the bushing 31 away from the driving main body 1 is matched with the set screw 34, and the set screw 34 can be rotated until the set screw 34 is in contact with the outer wall of the drive shaft 2 in the bushing 31, and the screw is tightened. The frictional force exerted by the set screw 34 on the drive shaft 2 can maintain the axial position of the bushing 31 relative to the drive shaft 2 , preventing the bushing 31 from moving frequently. When it is necessary to adjust the position of the bushing 31 to make the bushing 31 cooperate with the intact sealing ring 33 , the set screw 34 can also be removed, push the bushing 31 and then use the set screw 34 to connect the bushing 31 and the The drive shaft 2 is fixed. It is easy to disassemble and adjust the bushing 31 .

It should be noted that when the bushing 31 is provided with the set screw 34, the fit between the bushing 31 and the drive shaft 2 can be a clearance fit, the bushing 31 itself can rotate relative to the drive shaft 2, and the set screw 34 will The bush 31 is fixed to the drive shaft 2 .

When the fit between the bushing 31 and the drive shaft 2 is a clearance fit and the bushing 31 and the drive shaft 2 are fixedly connected by the set screw 34 , the adjustment of the position of the bushing 31 is more convenient.

Optionally, when the fit between the bushing 31 and the drive shaft 2 is clearance fit, there is an annular sealing ring 35 between the bushing 31 and the driving shaft 2 , and the annular sealing ring 35 seals the inner wall of the bushing 31 and the drive shaft 2 . outer wall. The tightness between the drive shaft 2 and the bushing 31 is ensured.

Exemplarily, the total length of the at least two sealing rings 33 in the axial direction of the bushing 31 may be smaller than the length of the bushing 31 .

The total length of the at least two sealing rings 33 in the axial direction of the bushing 31 is less than the length of the bushing 31. When the bushing 31 is adjusted to seal with the sealing ring 33 farthest from the bottom surface 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 one end of the bushing 31 close to the cylindrical groove 321 has a chamfer 312 .

The outer wall of one end of the bushing 31 close to the cylindrical groove 321 has a chamfer 312, so that when the bushing 31 is pushed toward the driving body 1 along the axial direction of the bushing 31, the bushing 31 can smoothly enter and be adjacent to the first sealing ring inside the sealing ring 33 without causing damage to the sealing ring 33 and ensuring the stable use of the sealing ring 33 .

As shown in FIG. 1 , a sealing space A can be enclosed between the insertion hole 11 , the drive shaft 2 , the bushing 31 , at least two sealing rings 33 and the sealing seat 32 , and the sealing space A is filled with pressure oil.

The socket 11, the drive shaft 2, the bushing 31, at least two sealing rings 33 and the sealing seat 32 form a sealing space A, the sealing space A is filled with pressure oil, and the pressure oil in the sealing space A can be opposite to the bushing The sealing ring 33 sealed by the outer wall of 31 exerts a certain pressure, which can offset the pressure from the propeller 4 side that the sealing ring 33 will receive, so that the sealing ring 33 can work in a relatively stable pressure environment, avoiding the sealing ring 33 Accelerated damage occurs. When the sealing ring 33 is a lip-shaped sealing ring, the pressure oil can also press the lip of the sealing ring 33 against the bushing 31 to improve the sealing effect of the lip-shaped sealing ring.

As shown in FIG. 1 , the sealing structure 3 may further include a gravity oil tank 36 which communicates with the sealing space A, and the minimum height of the gravity oil tank 36 is higher than the maximum height of the sealing seat 32 .

The gravity oil tank 36 can replenish pressure oil into the sealed space A in time to ensure that the sealed space A is filled with pressure oil.

As shown in FIG. 1 , the sealing seat 32 may have an oil discharge hole 322 communicating with the sealing space A, and a plug 323 is formed in the oil discharge hole 322 .

The oil drain hole 322 can facilitate the discharge of oil. When the bushing 31 needs to be adjusted, the blockage 323 can also be removed. When the bushing 31 is pushed toward the driving body 1, the oil can be pushed into the oil drain hole 322. After the position adjustment is completed, the plug 323 is installed on the oil discharge hole 322 to reduce the resistance that the bushing 31 will receive when the position is adjusted.

As shown in FIG. 1 , the sealing structure 3 further includes a support ring 37 , a support ring 37 is coaxially disposed between two adjacent seal rings 33 , and the inner diameter of the support ring 37 is larger than the outer diameter of the bushing 31 .

The support ring 37 can support the sealing ring 33 to ensure stable operation of the sealing ring 33 .

As shown in FIG. 1 , the sealing structure 3 further includes an annular cover 38 , which is detachably connected to the sealing seat 32 , and the annular cover 38 is disposed on the side of the at least two sealing rings 33 away from the bottom surface 321 a of the cylindrical groove 321 . The cover 38 abuts against a sealing ring 33 that is farthest from the bottom surface 321 a of the cylindrical groove 321 .

The annular cover 38 can support the sealing ring 33 farthest from the bottom surface 321 a of the cylindrical groove 321 , ensuring that the sealing ring 33 farthest from the bottom surface 321 a of the cylindrical groove 321 can be used stably.

On the basis that the end of the bushing 31 away from the driving main body 1 protrudes from the sealing seat 32 , the sealing structure 3 may further include a dustproof ring 39 , the dustproof ring 39 is coaxially sleeved on the bushing 31 , and the dustproof ring 39 and The side of the sealing seat 32 away from the cylindrical groove 321 abuts against each other.

The dustproof 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 bushing 31 may have an annular groove 313 corresponding to the annular protrusion 391 .

The inner wall of the dustproof ring 39 has a coaxial annular protrusion 391, and the outer wall of the bushing 31 has an annular groove 313 corresponding to the annular protrusion 391. The dustproof ring 39 can be more closely fixed with the dust effect.

As shown in FIG. 1 , in the axial direction of the bushing 31 , the outer wall of the bushing 31 has a plurality of annular grooves 313 arranged at equal intervals.

The plurality of annular grooves 313 arranged at equal intervals can ensure that the dustproof ring 39 can be installed on the corresponding annular grooves 313 after adjusting the position of the bushing 31 relative to the drive shaft 2 to ensure the dustproof effect.

As shown in FIG. 1 , the drive shaft 2 may have a limiting shoulder 21 for abutting against the end face of the bushing 31 at one end of the drive body 1 .

When the position of the bushing 31 is adjusted until the bushing 31 is sealed with the sealing ring 33 farthest from the bottom surface 321a of the cylindrical groove 321, the end face of the bushing 31 at one end of the bushing 31 close to the driving body 1 can abut against the limiting shaft shoulder 21 , the bushing 31 is limited by the shaft shoulder, and the bushing 31 will not continue to advance in the axial direction.

As shown in FIG. 1 , an annular sealing ring 35 can be used for sealing between the sealing seat 32 and the driving body 1 . The sealing between the sealing seat 32 and the driving body 1 is ensured.

FIG. 2 is a simplified structural schematic diagram of another state of the marine propulsion device provided by the embodiment of the present disclosure. As shown in FIG. 2 , the sealing ring 33 adjacent to the first sealing ring is sealed with the bushing 31 at this time, and the bushing 31 is advanced a certain distance towards the drive body 1 relative to the state shown in FIG. 1 .

Before pushing the bushing 31, the axial thickness of the sealing ring 33 can be measured first, and the bushing 31 can be pushed by the distance of the axial thickness of one sealing ring 33, so that the bushing 31 can be sealed with another intact sealing ring 33 .

The above are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure. Inside.

Claims (10)

1. A marine propulsion device comprising a drive main body (1), a drive shaft (2), a sealing structure (3) and a propeller (4), and one end of the drive shaft (2) is inserted in the In the insertion hole (11) of the drive main body (1), the other end of the drive shaft (2) is connected to the propeller (4), and the sealing structure (3) seals the drive shaft (2) with the propeller (4). Said drive body (1), It is characterized in that the sealing structure (3) comprises a bushing (31), a sealing seat (32) and at least two sealing rings (33), and the bushing (31) is coaxially sleeved on the drive shaft (32). 2) and sealingly fit with the drive shaft (2), the seal seat (32) is sleeved on the bushing (31), the seal seat (32) is sealed with the drive body (1) connected, the sealing seat (32) has a cylindrical groove (321) coaxial with the bushing (31), and the at least two sealing rings (33) are stacked on the cylindrical groove (321) Inside, the at least two sealing rings (33) are arranged coaxially with the cylindrical groove (321), and the sealing ring ( 33) sealing with the outer wall of the bushing (31), The one sealing ring (33) with the smallest distance from the bottom surface (321a) of the cylindrical groove (321) is the first sealing ring (33), and the one adjacent to the first sealing ring (33) is the first sealing ring (33). The minimum distance (D) between the sealing ring (33) and the bottom surface (321a) of the cylindrical groove (321) is greater than the end surface of the bushing (31) close to one end of the cylindrical groove (321) The minimum distance (d) from the bottom surface (321a) of the cylindrical groove (321). 2. The marine propulsion device according to claim 1, characterized in that, one end of the bushing (31) away from the driving body (1) protrudes from the sealing seat (32), and the bushing (31) extends out of the sealing seat (32). ) is provided with a threaded through hole (311) in the radial direction at one end away from the driving body (1), and a set screw (34) is threadedly connected to the threaded through hole (311). 3. The marine propulsion device according to claim 1, wherein the total length of the at least two sealing rings (33) in the axial direction of the bushing (31) is smaller than that of the bushing (31) length. 4. The marine propulsion device according to any one of claims 1 to 3, wherein the insertion hole (11), the drive shaft (2), the bushing (31), the at least two A sealing space (A) is enclosed between the sealing rings (33) and the sealing seat (32), and the sealing space (A) is filled with pressure oil. 5. The marine propulsion device according to claim 4, wherein the sealing structure (3) further comprises a gravity oil tank (36), and the gravity oil tank (36) communicates with the sealed space (A), so that the The minimum height of the gravity oil tank (36) is higher than the maximum height of the sealing seat (32). 6. The marine propulsion device according to any one of claims 1 to 3, characterized in that, the sealing structure (3) further comprises a support ring (37), and between the two adjacent sealing rings (33) The support rings (37) are coaxially arranged between them, and the inner diameter of the support rings (37) is larger than the outer diameter of the bushing (31). 7. The marine propulsion device according to any one of claims 1 to 3, characterized in that, the sealing structure (3) further comprises an annular cover (38), the annular cover (38) and the sealing seat (38). 32) Removable connection, the annular cover (38) is arranged on the side of the at least two sealing rings (33) away from the bottom surface (321a) of the cylindrical groove (321), the annular cover (38) It abuts against the one of the sealing rings (33) farthest from the bottom surface (321a) of the cylindrical groove (321). 8 . The marine propulsion device according to claim 2 , wherein the sealing structure ( 3 ) further comprises a dust ring ( 39 ), and the dust ring ( 39 ) is coaxially sleeved on the bushing. 9 . (31), and the dust ring (39) is in contact with the side of the sealing seat (32) away from the cylindrical groove (321). 9 . The marine propulsion device according to claim 8 , wherein the inner wall of the dust ring ( 39 ) has a coaxial annular protrusion ( 391 ), and the outer wall of the bushing ( 31 ) has a An annular groove (313) corresponding to the annular protrusion (391). 10. The marine propulsion device according to any one of claims 1 to 3, characterized in that, an outer wall of one end of the bushing (31) close to the cylindrical groove (321) has a chamfer (312).

Images