Water lubricated bearing structure with integrated dynamic seal support

Abstract

The application provides a water-lubricated bearing structure with integrated dynamic sealing and bearing, and relates to the technical field of ship propulsion system transmission, comprising a bearing assembly, a sealing assembly and a main shaft, the bearing assembly and the sealing assembly are both sleeved on the outer periphery of the main shaft, one end of the bearing assembly is used for connecting a ship body, the other end is connected with the sealing assembly, one end of the main shaft extends to the outside of the ship body and is used for connecting a propeller, and the other end is placed in the inside of the ship body and is used for connecting a propulsion motor. In the application, the bearing assembly and the sealing assembly are directly connected with each other and are both sleeved on the outer periphery of the main shaft, so that the support and sealing structure of the main shaft is more compact, the installation space in the inside of the ship body can be reduced, the arrangement length of the whole shafting can be shortened, and the weight is reduced.

Description

Technical Field

[0001] This invention relates to the field of marine propulsion system transmission technology, and in particular to a water-lubricated bearing structure with integrated dynamic seal support. Background Technology

[0002] A ship's propulsion system typically includes a propulsion motor, a drive shaft, and a propeller. One end of the drive shaft is connected to the propulsion motor, and the other end is connected to the propeller. The propulsion motor drives the drive shaft to rotate, which in turn drives the propeller to rotate, thus enabling the ship to move forward in the water.

[0003] Water-lubricated bearings are one of the most important components in a ship's propulsion shafting system, primarily responsible for supporting the weight of the outboard propeller. The propulsion shafting system connects the outboard propeller to the inboard propulsion motor; to achieve effective sealing, dynamic sealing devices must be installed where the propulsion shafting passes through the hull structure.

[0004] In existing ship propulsion systems, the water-lubricated bearings and dynamic sealing devices connected to the ship's propulsion shaft are arranged in a decentralized manner, resulting in a longer overall shaft length, greater weight, which is not conducive to the stable operation of the shaft and also results in poor sealing performance. Summary of the Invention

[0005] This invention provides a water-lubricated bearing structure that integrates dynamic seal support to solve the defects of the prior art where the water-lubricated bearing and dynamic seal device are arranged separately, resulting in a longer overall shaft length and greater weight.

[0006] This invention provides a water-lubricated bearing structure with integrated dynamic seal support, comprising: a bearing assembly, a sealing assembly, and a main shaft. The bearing assembly and the sealing assembly are both sleeved on the outer periphery of the main shaft. One end of the bearing assembly is used to connect to the hull, and the other end is connected to the sealing assembly. One end of the main shaft extends to the outside of the hull and is used to connect to the propeller, while the other end is placed inside the hull and is used to connect to the propulsion motor.

[0007] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided. The bearing assembly includes: a bearing housing, a bearing bush, and a bearing shell. The bearing shell, the bearing bush, and the bearing housing are sequentially sleeved on the outer periphery of the main shaft. The bearing housing is used to fix the bearing assembly to the hull.

[0008] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided, wherein the bearing bush is constructed of non-metallic material and is installed on the inner side of the bearing bush by means of cold fitting.

[0009] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided. The bearing housing includes: a collar portion, a first flange and a second flange. The collar portion is constructed as a cylinder and is sleeved on the outside of the bearing bushing. The first flange and the second flange are respectively disposed at both ends of the collar portion. The first flange is used to fixally connect to the hull, and the second flange is connected to the sealing assembly.

[0010] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided. The sealing assembly includes: a static sealing ring, a dynamic sealing ring, a connecting part, and a dynamic ring mounting seat. The connecting part is sleeved on the outer periphery of the spindle and connected to the bearing assembly. The dynamic ring mounting seat is sleeved on the outer periphery of the spindle and fixedly connected to the spindle. The dynamic sealing ring is sleeved on the outer periphery of the spindle and fixedly installed in the dynamic ring mounting seat. The static sealing ring is sleeved on the outer periphery of the spindle, with one end fixed to the connecting part and the other end abutting against the dynamic sealing ring.

[0011] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided, wherein the dynamic ring mounting seat is provided with a dynamic ring mounting groove, the opening direction of the dynamic ring mounting groove is towards the static seal ring in the axial direction of the main shaft, and the dynamic seal ring is disposed in the dynamic ring mounting groove.

[0012] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided. The connecting part includes a support housing, a transition housing, and a snap-fit ​​seat. One end of the support housing is connected to the bearing assembly, and the other end of the support housing abuts against the transition housing. The other end of the support housing is provided with an annular first flange. The transition housing is provided with a second flange abutting against the first flange. The snap-fit ​​seat is arranged around the outer periphery of the first flange and the second flange, and the first flange and the second flange are simultaneously snapped into the snap-fit ​​groove of the snap-fit ​​seat.

[0013] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided, wherein the connecting part further includes a stationary ring mounting seat, the stationary ring mounting seat is disposed on the side of the transition housing facing the dynamic ring mounting seat, an elastic buffer is provided between the transition housing and the stationary ring mounting seat, and the stationary sealing ring is fixedly mounted on the stationary ring mounting seat.

[0014] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided, wherein the transition housing is provided with a placement hole, the opening of the placement hole is oriented toward the stationary ring mounting seat in the axial direction of the main shaft, and the elastic buffer is disposed in the placement hole.

[0015] According to the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided, wherein the support housing is provided with an annular first outer positioning surface on the outer periphery of the end near the bearing assembly, and the bearing assembly is provided with an annular first inner positioning surface on the inner side of the end near the support housing, and the first outer positioning surface abuts against the first inner positioning surface; the support housing is provided with an annular second inner positioning surface on the inner periphery of the end near the transition housing, and the transition housing is provided with an annular second outer positioning surface on the outer periphery of the end near the support housing, and the second outer positioning surface abuts against the second inner positioning surface.

[0016] The water-lubricated bearing structure provided by the present invention includes a bearing assembly, a sealing assembly, and a main shaft. The bearing assembly and the sealing assembly are directly connected to each other and are simultaneously fitted on the outer periphery of the main shaft, making the support and sealing structure of the main shaft more compact. While ensuring the support and sealing effect, it can reduce the installation space inside the ship body and shorten the overall shafting length and reduce the weight. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a water-lubricated bearing structure with integrated dynamic seal support according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Enlarged view of section A.

[0020] Figure label:

[0021] 1. Bearing assembly; 11. Bearing housing; 12. Bearing bushing; 13. Bearing shell; 2. Sealing assembly; 21. Static sealing ring; 22. Dynamic sealing ring; 23. Connecting part; 231. Support housing; 232. Transition housing; 233. Snap-fit ​​seat; 234. Static ring mounting seat; 24. Dynamic ring mounting seat; 25. Front snap ring; 26. Rear snap ring; 27. Locating key; 28. Elastic buffer; 29. ​​Clamping ring; 3. Main shaft; 4. Hull. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] In one embodiment of the present invention, a water-lubricated bearing structure integrating dynamic seal support is provided. The bearing assembly and sealing assembly in this structure are integrated into a single design, resulting in a more compact structure. While ensuring support and sealing performance, this design reduces the installation space within the hull and shortens the overall shafting length, thus reducing weight. The following is combined with… Figure 1 and Figure 2 The water-lubricated bearing structure with integrated dynamic seal support in this embodiment is further described in the illustration.

[0024] like Figure 1 As shown, the water-lubricated bearing structure with integrated dynamic seal support in this embodiment includes: bearing assembly 1, sealing assembly 2 and main shaft 3. Both bearing assembly 1 and sealing assembly 2 are sleeved on the outer periphery of main shaft 3. One end of bearing assembly 1 is used to connect to hull 4, and the other end is connected to sealing assembly 2. One end of main shaft 3 extends to the outside of hull 4 and is used to connect to propeller, and the other end is placed inside hull 4 and is used to connect to propulsion motor.

[0025] It is understood that the water-lubricated bearing structure with integrated dynamic seal support in this embodiment can be installed at the bottom of the hull 4. The bottom of the hull 4 is provided with a through hole for the main shaft 3 to extend outward. One end of the main shaft 3 can extend outward through the through hole and connect to the propeller, while the other end of the main shaft is placed inside the hull and connected to the propulsion motor. The propeller can be a propeller, which can generate thrust when rotating in water.

[0026] When the propulsion motor drives the main shaft 3 to rotate, the thruster can rotate synchronously, thereby providing the hull 4 with the thrust to move forward or backward.

[0027] Both the bearing assembly 1 and the sealing assembly 2 are fitted around the outer periphery of the main shaft 3. The bearing assembly 1 is connected to the hull 4 and can support the main shaft 3. The sealing assembly 2 is connected to the bearing assembly 1 and can seal the main shaft 3 to prevent water from outside the hull 4 from entering the hull.

[0028] In this embodiment, the sealing assembly 2 is directly connected to the bearing assembly 1, and it no longer needs to be connected to other structures inside the hull 4. The entire structure is highly compact and occupies little space, which can shorten the length of the entire shaft system and ensure sufficient support and sealing effect for the main shaft 3.

[0029] Furthermore, in this embodiment, the bearing assembly 1 includes: a bearing housing 11, a bearing bush 12, and a bearing shell 13. The bearing shell 13, the bearing bush 12, and the bearing housing 11 are sequentially sleeved on the outer periphery of the main shaft 3, and the bearing housing 11 is used to fixally connect to the hull 4.

[0030] like Figure 1 As shown, the bearing assembly 1 is located inside the hull 4, wherein the bearing housing 11, bearing bush 12, and bearing shell 13 are all constructed as cylindrical structures. In the radial direction of the main shaft 3, the bearing shell 13, bearing bush 12, and bearing housing 11 are arranged at intervals and connected in sequence, and the bearing housing 11 is also fixedly connected to the hull 4.

[0031] It is understood that the bearing housing 11, bearing bush 12, and bearing shell 13 together form a water-lubricated bearing module. During the process of the propulsion motor driving the main shaft 3 to rotate, seawater or fresh water from outside the hull can enter between the bearing shell 13 and the main shaft 3 to form lubrication. Thus, the bearing assembly 1 can provide sufficient support for the main shaft 3 while ensuring that the main shaft 3 can rotate normally.

[0032] Since ships mostly operate in seawater or freshwater environments, in one embodiment, the bearing bush 13 can be constructed from non-metallic materials, such as PEEK. For ease of installation, the bearing bush 13 can also be installed inside the bearing bush 12 using a cold-fitting method.

[0033] In this embodiment, the bearing housing 11 includes a collar portion, a first flange, and a second flange. The collar portion is cylindrical and is fitted onto the outside of the bearing bushing 12. The first flange and the second flange are respectively disposed at both ends of the collar portion. The first flange is fixedly connected to the hull 4, and the second flange is connected to the sealing assembly 2.

[0034] The first flange may be provided with multiple bolt holes. Then, the first flange may be fixed inside the hull 4 by means of bolts, thereby achieving the fixation of the entire bearing assembly 1.

[0035] Accordingly, in order to facilitate the installation of the bearing bushing 12, the outer end of the bearing bushing 12 away from the sealing assembly 2 can be constructed as a radially outward annular flange. Multiple bolt holes can be provided on the annular flange. Then, the annular flange can be fixed to the first flange by means of bolts, thereby realizing the fixation of the bearing bushing 12.

[0036] In this embodiment, the sealing assembly 2 uses a dynamic seal to seal the spindle 3. Specifically, as follows: Figure 1 and Figure 2 As shown, the sealing assembly 2 includes: a static sealing ring 21, a dynamic sealing ring 22, a connecting part 23, and a dynamic ring mounting seat 24. The connecting part 23 is sleeved on the outer periphery of the main shaft 3 and connected to the bearing assembly 1. The dynamic ring mounting seat 24 is sleeved on the outer periphery of the main shaft 3 and fixedly connected to the main shaft 3. The dynamic sealing ring 22 is sleeved on the outer periphery of the main shaft 3 and fixedly installed in the dynamic ring mounting seat 24. The static sealing ring 21 is sleeved on the outer periphery of the main shaft 3, with one end of the static sealing ring 21 fixed to the connecting part 23 and the other end abutting against the dynamic sealing ring 22.

[0037] It is understood that the connecting part 23 is at least partially constructed as a ring structure, which is sleeved on the outer periphery of the main shaft 3, and one end of the connecting part 23 in the axial direction of the main shaft 3 is connected to the bearing assembly 1. The static sealing ring 21 is sleeved on the outer periphery of the main shaft 3, one end of which is fixedly connected to the connecting part 23, and the other end protrudes towards the dynamic sealing ring 22 in the axial direction of the main shaft 3. The dynamic ring mounting seat 24 is constructed as a ring structure, which is fixedly sleeved on the outer periphery of the main shaft 3.

[0038] Both the static sealing ring 21 and the dynamic sealing ring 22 can be constructed from elastic materials such as rubber.

[0039] like Figure 2 As shown, the sealing assembly 2 also includes a front retaining ring 25, a rear retaining ring 26, and a locating key 27. In the axial direction of the main shaft 3, the front retaining ring 25 and the rear retaining ring 26 are respectively disposed on both sides of the rotating ring mounting base 24, and the front retaining ring 25 and the rear retaining ring 26 can be respectively engaged with the outer periphery of the main shaft 3 through a retaining groove provided on the main shaft 3. A keyway is also provided on the main shaft 3 between the front retaining ring 25 and the rear retaining ring 26, and the locating key 27 can be engaged in the keyway, allowing the rotating ring mounting base 24 to be radially fixed to the main shaft 3 via the locating key 27. Thus, the axial forward and backward movement of the rotating ring mounting base 24 can be limited by the front retaining ring 25 and the rear retaining ring 26, while the radial rotation of the rotating ring mounting base 24 can be limited by the locating key 27.

[0040] The dynamic sealing ring 22 is sleeved on the outer periphery of the main shaft 3 and fixedly installed in the dynamic ring mounting seat 24. The dynamic sealing ring 22 has an abutting surface on the side of the main shaft 3 facing the static sealing ring 21 in the axial direction. The static sealing ring 21 can abut against the abutting surface of the dynamic sealing ring 22.

[0041] When the hull 4 is placed in seawater or freshwater, water will reach the area where the static sealing ring 21 and the dynamic sealing ring 22 are located through the gap between the main shaft 3 and the bearing 13. During the rotation of the main shaft 3, the dynamic sealing ring 22 rotates synchronously with the main shaft 3, while the static sealing ring 21 remains stationary. The dynamic sealing ring 22 can rotate relative to the static sealing ring 21, and the dynamic sealing ring 22 can always maintain contact with the static sealing ring 21, and can form an annular sealing surface on the outer circumference of the main shaft 3, thereby preventing water from entering the interior of the hull 4 and achieving effective sealing.

[0042] To facilitate the installation of the dynamic sealing ring 22, such as Figure 2 As shown, the rotating ring mounting base 24 is provided with a rotating ring mounting groove. The opening direction of the rotating ring mounting groove is towards the static sealing ring 21 in the axial direction of the main shaft 3, and the rotating sealing ring 22 is disposed in the rotating ring mounting groove.

[0043] In this embodiment, the dynamic sealing ring 22 and the dynamic ring mounting seat 24 are disposed between the bearing assembly 1 and the static sealing ring 21. The dynamic ring mounting groove is disposed at one end of the dynamic ring mounting seat 24 away from the bearing assembly 1, and the dynamic sealing ring 22 is fixedly disposed in the dynamic ring mounting groove. The abutment surface of the dynamic sealing ring 22 can face the static sealing ring 21 in the axial direction of the spindle 3, thereby allowing the static sealing ring 21 to abut against the abutment surface in the axial direction of the spindle 3.

[0044] In this embodiment, such as Figure 2 As shown, the connecting part 23 includes a support housing 231, a transition housing 232, and a snap-fit ​​seat 233. One end of the support housing 231 is connected to the bearing assembly 1, and the other end of the support housing 231 abuts against the transition housing 232. The other end of the support housing 231 is provided with an annular first flange, and the transition housing 232 is provided with a second flange that abuts against the first flange. The snap-fit ​​seat 233 is arranged around the outer periphery of the first flange and the second flange, and the first flange and the second flange are snapped in the snap-fit ​​groove of the snap-fit ​​seat 233.

[0045] For example, the support housing 231 has an annular mounting flange at one end near the bearing assembly 1. This mounting flange can be fixedly connected to the second flange of the bearing housing 11 in the bearing assembly 1 by means of bolts or other structures. The other end of the support housing 231 away from the bearing assembly 1 has an annular first flange, which abuts against the second flange of the transition housing 232. The snap-fit ​​seat 233 is constructed as an annular structure, with a snap-fit ​​groove on its inner side. The first and second flanges can be snapped into the snap-fit ​​groove of the snap-fit ​​seat 233. Thus, the support housing 231 and the transition housing 232 can be effectively fixed together by means of the snap-fit ​​seat 233.

[0046] Optionally, for ease of installation, the snap-fit ​​base 233 may include two arc-shaped structures that can be connected end to end to form a ring structure by means of bolts or other structures, and can be fitted onto the outer periphery of the first flange and the second flange, thereby achieving fixed installation of the first flange and the second flange.

[0047] The main shaft 3 moves forward under the action of the pusher. To prevent the moving seal ring 22 from excessively squeezing the stationary seal ring 21 due to the movement of the main shaft 3, thus affecting the sealing effect between them, such as... Figure 2 As shown, the connecting part also includes a stationary ring mounting seat 234, which is disposed on the side of the transition housing 232 facing the moving ring mounting seat 24. An elastic buffer 28 is provided between the transition housing 232 and the stationary ring mounting seat 234, and the stationary sealing ring 21 is fixedly mounted on the stationary ring mounting seat 234.

[0048] In this embodiment, the stationary ring mounting base 234 and the rotating ring mounting base 24 are disposed opposite to each other. The stationary sealing ring 21 on the stationary ring mounting base 234 protrudes outward along the axial direction of the main shaft 3 and abuts against the rotating sealing ring 22 on the rotating ring mounting base 24. Moreover, the stationary ring mounting base 234 is connected to the transition housing 232 via an elastic buffer member 28, and the stationary ring mounting base 234 can move relative to the transition housing 232 in the axial direction of the main shaft 3 with buffer.

[0049] In actual use, when the hull 4 is placed in seawater or fresh water and the propulsion motor rotates, the main shaft 3 is subjected to forward thrust. At this time, the dynamic sealing ring 22 will squeeze the static sealing ring 21 along the direction of the thrust. Due to the elastic buffer 28, the elastic buffer 28 is compressed, which can prevent the dynamic sealing ring 22 from excessively squeezing the static sealing ring 21 and ensure the sealing effect.

[0050] To facilitate the installation of the elastic buffer 28, such as Figure 2 As shown, the transition housing 232 is provided with a placement hole, the opening of which faces the stationary ring mounting seat 234 in the axial direction of the spindle 3, and the elastic buffer 28 is disposed in the placement hole.

[0051] For example, the placement hole can be configured as a blind hole extending along the axial direction of the spindle 3 and opening towards the stationary ring mounting base 234. An elastic buffer 28 is disposed in this placement hole, with one end connected to the bottom of the placement hole and the other end extending outside the placement hole and fixedly connected to the stationary ring mounting base 234. A stationary sealing ring 21 is disposed on the side of the stationary ring mounting base 234 opposite to the elastic buffer 28.

[0052] For example, the elastic buffer 28 can be a spring.

[0053] In an optional embodiment, during the buffering movement of the stationary ring mounting base 234 following the stationary sealing ring 21, in order to avoid excessive displacement of its position, the stationary ring mounting base 234 is provided with a positioning flange extending toward the side of the transition housing 232. In the radial direction of the main shaft 3, the positioning flange can be located between the transition housing 232 and the main shaft 3, and the positioning flange abuts against the inner wall surface of the transition housing 232.

[0054] In practical use, during the buffering movement of the stationary ring mounting base 234, the positioning flange can move along the axial direction of the main shaft 3 while adhering to the inner wall surface of the transition housing 232. Thus, under the adhering action of the inner wall surface of the transition housing 232, the movement of the stationary ring mounting base 234 in the radial direction of the main shaft 3 can be effectively limited.

[0055] Furthermore, in order to achieve effective sealing, a sealing gasket may be provided between the positioning flange and the inner wall surface of the transition housing 232.

[0056] Furthermore, such as Figure 2 As shown, the connecting part also includes a clamping ring 29. The stationary ring mounting base 234 has a boss on the side facing the dynamic sealing ring 22. The clamping ring 29 is arranged around the outer periphery of the boss in the radial direction of the main shaft 3. The stationary sealing ring 21 is engaged between the boss and the clamping ring 29. Thus, the stationary sealing ring 21 can be fixedly mounted on the stationary ring mounting base 234 by means of the clamping ring 29.

[0057] In an optional embodiment, the clamping ring 29 has a clamping surface formed on the inner wall of the boss, the clamping surface extends inward at an angle toward the dynamic sealing ring 22, and the static sealing ring 21 abuts against the clamping surface.

[0058] It is understandable that, in the direction from the inside of the hull 4 to the outside of the hull 4, the clamping surface gradually extends towards the main shaft 3 at an incline. When installing the static sealing ring 21, the static sealing ring 21 can be first fitted onto the boss of the static ring mounting base 234, and then the clamping ring 29 can be installed. The clamping surface of the clamping ring 29 can fully abut against the static sealing ring 21, and due to the incline of the clamping surface, the static sealing ring 21 can be prevented from detaching from the static ring mounting base 234.

[0059] For example, the clamping ring 29 can be fixed to the stationary ring mounting base 234 by means of bolts or other structures. Moreover, in order to achieve effective sealing, a sealing gasket can be provided between the stationary sealing ring 21 and the stationary ring mounting base 234.

[0060] In addition, to achieve effective positioning, such as Figure 2As shown, the support housing 231 has an annular first outer positioning surface on the outer periphery of the end near the bearing assembly 1, and the bearing assembly 1 has an annular first inner positioning surface on the inner side of the end near the support housing 231. The first outer positioning surface abuts against the first inner positioning surface. The support housing 231 has an annular second inner positioning surface on the inner periphery of the end near the transition housing 232, and the transition housing 232 has an annular second outer positioning surface on the outer periphery of the end near the support housing 231. The second outer positioning surface abuts against the second inner positioning surface.

[0061] For example, the support housing 231 has an annular boss at one end facing the bearing housing 11, and a first outer positioning surface is provided on the outer peripheral surface of the annular boss. The bearing housing 11 has a step at one end facing the support housing 231, and a first inner positioning surface is provided on the inner peripheral surface of the step. The first outer positioning surface and the first inner positioning surface abut against each other, thereby enabling the installation and positioning between the support housing 231 and the bearing housing 11.

[0062] The supporting housing 231 has an inner wall at one end facing the transition housing 232, and a second inner positioning surface is disposed on the inner circumferential surface of the inner wall. The transition housing 232 has a step at one end facing the supporting housing 231, and a second outer positioning surface is disposed on the outer circumferential surface of the step. The second outer positioning surface abuts against the second inner positioning surface, thereby enabling the installation positioning between the supporting housing 231 and the transition housing 232.

[0063] In this embodiment, by means of the first outer positioning surface abutting against the first inner positioning surface and the second outer positioning surface abutting against the second inner positioning surface, the entire sealing structure can be effectively positioned, thereby ensuring that the dynamic sealing ring 22 can always abut against the static sealing ring 21 to ensure the sealing effect between them.

[0064] Therefore, the water-lubricated bearing structure with integrated dynamic seal support in this embodiment has the following advantages:

[0065] The water-lubricated bearing structure in this embodiment includes a bearing assembly, a sealing assembly, and a main shaft. The bearing assembly and the sealing assembly are directly connected to each other and are simultaneously fitted onto the outer circumference of the main shaft, making the support and sealing structure of the main shaft more compact. While ensuring the support and sealing effect, it can reduce the installation space inside the ship's body and shorten the overall shafting length and reduce weight.

[0066] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water-lubricated bearing structure integrating dynamic seal support, characterized in that, include: The system includes a bearing assembly, a sealing assembly, and a main shaft. The bearing assembly and the sealing assembly are both sleeved on the outer periphery of the main shaft. One end of the bearing assembly is used to connect to the hull, and the other end is connected to the sealing assembly. One end of the main shaft extends to the outside of the hull and is used to connect to the thruster, while the other end is placed inside the hull and is used to connect to the propulsion motor. The sealing assembly includes a connecting portion; the connecting portion includes a support housing, a transition housing, and a snap-fit ​​seat. One end of the support housing is connected to the bearing assembly, and the other end of the support housing abuts against the transition housing. The other end of the support housing is provided with an annular first flange, and the transition housing is provided with a second flange abutting against the first flange. The snap-fit ​​seat is arranged around the outer periphery of the first flange and the second flange, and the first flange and the second flange are simultaneously snapped into the snap-fit ​​groove of the snap-fit ​​seat. The supporting housing has an annular first outer positioning surface at the outer periphery of the end near the bearing assembly, and the bearing assembly has an annular first inner positioning surface at the inner side of the end near the supporting housing, with the first outer positioning surface abutting against the first inner positioning surface; the supporting housing has an annular second inner positioning surface at the inner periphery of the end near the transition housing, and the transition housing has an annular second outer positioning surface at the outer periphery of the end near the supporting housing, with the second outer positioning surface abutting against the second inner positioning surface; The connecting part also includes a stationary ring mounting base; The stationary ring mounting base extends toward the side of the transition housing and is provided with a positioning flange. In the radial direction of the main shaft, the positioning flange can be located between the transition housing and the main shaft, and the positioning flange abuts against the inner wall surface of the transition housing. During the buffering motion of the stationary ring mounting base, the positioning flange can move along the axial direction of the main shaft while adhering to the inner wall surface of the transition housing. A sealing gasket is provided between the positioning flange and the inner wall surface of the transition housing.

2. The water-lubricated bearing structure with integrated dynamic seal support according to claim 1, characterized in that, The bearing assembly includes a bearing housing, a bearing bush, and a bearing shell, wherein the bearing shell, the bearing bush, and the bearing housing are sequentially fitted onto the outer periphery of the main shaft, and the bearing housing is used to fix it to the hull.

3. The water-lubricated bearing structure with integrated dynamic seal support according to claim 2, characterized in that, The bearing bush is made of non-metallic material and is installed on the inner side of the bearing bush by cold fitting.

4. The water-lubricated bearing structure with integrated dynamic seal support according to claim 2, characterized in that, The bearing housing includes a collar portion, a first flange, and a second flange. The collar portion is cylindrical and is fitted onto the outside of the bearing bushing. The first flange and the second flange are respectively located at both ends of the collar portion. The first flange is used to fix the connection to the hull, and the second flange is connected to the sealing assembly.

5. The water-lubricated bearing structure with integrated dynamic seal support according to claim 1, characterized in that, The sealing assembly includes a static sealing ring, a dynamic sealing ring, and a dynamic ring mounting base. The connecting portion is sleeved on the outer periphery of the spindle and connected to the bearing assembly. The dynamic ring mounting base is sleeved on the outer periphery of the spindle and fixedly connected to the spindle. The dynamic sealing ring is sleeved on the outer periphery of the spindle and fixedly installed in the dynamic ring mounting base. The static sealing ring is sleeved on the outer periphery of the spindle, with one end fixed to the connecting portion and the other end abutting against the dynamic sealing ring.

6. The water-lubricated bearing structure with integrated dynamic seal support according to claim 5, characterized in that, The rotating ring mounting base is provided with a rotating ring mounting groove, the opening of which faces the static sealing ring in the axial direction of the main shaft, and the rotating sealing ring is disposed in the rotating ring mounting groove.

7. The water-lubricated bearing structure with integrated dynamic seal support according to claim 5, characterized in that, The stationary ring mounting base is disposed on the side of the transition housing facing the moving ring mounting base, and an elastic buffer is provided between the transition housing and the stationary ring mounting base. The stationary sealing ring is fixedly mounted on the stationary ring mounting base.

8. The water-lubricated bearing structure with integrated dynamic seal support according to claim 7, characterized in that, The transition housing is provided with a placement hole, the opening of which faces the stationary ring mounting seat in the axial direction of the spindle, and the elastic buffer is disposed in the placement hole.

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