stern tube rear bearing oil guide groove

Abstract

The application relates to the ship technology field and discloses a stern tube rear bearing oil guide groove, which comprises a rear shaft shell and a rear bearing, the inside of the rear bearing is provided with a ship driving main shaft, the two ends of the rear bearing are respectively provided with a first sealing sleeve and a second sealing sleeve, the outer wall of the first sealing sleeve is provided with an oil inlet pipe, the outer wall of the second sealing sleeve is provided with an oil outlet pipe, the outer wall of the ship driving main shaft is fixedly provided with a centrifugal oil guide mechanism, and the centrifugal oil guide mechanism is located in the inside of the second sealing sleeve. The stern tube rear bearing oil guide groove can directly transport lubricating oil to the stern tube rear bearing through the rear shaft shell, the rear bearing, the ship driving main shaft, the first sealing sleeve, the second sealing sleeve, the oil inlet pipe, the oil outlet pipe and the centrifugal oil guide mechanism, the oil film establishment thickness of the rear bearing is maximally ensured, and whether from theoretical calculation or actual application, the occurrence of accidents caused by high temperature heating of the stern tube rear bearing due to insufficient oil supply is limited.

Description

Technical Field

[0001] The invention relates to the technical field of ships, in particular to an oil guide groove for a stern tube rear bearing. Background Art

[0002] With the increasing demand for global shipping, the deadweight tonnage of ships has also increased accordingly. The utilization rate of main engines with large cylinder diameter and extra-long stroke has become increasingly higher, and the matching shaft system has also become thicker accordingly. The volume of the stern tube cylinder will also become larger, and the requirements for the displacement of lubricating oil delivered to the stern tube have become higher and higher. If the delivery is blocked or the delivery volume is too small, dry friction between the stern shaft and the bearing will occur, causing high temperature accidents of the bearings. Therefore, a stern tube rear bearing oil guide groove is required. The oil guide groove design can be used to directly deliver the lubricating oil to the stern tube rear bearing, thereby ensuring the thickness of the oil film established on the rear bearing to the greatest extent, and limiting the high temperature accidents caused by insufficient oil supply to the stern tube rear bearing. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides an oil guide groove for a stern tube rear bearing, which solves the problems mentioned in the above background.

[0004] The present invention provides the following technical solution: a stern tube rear bearing oil guide groove, comprising: a rear axle housing and a rear bearing, a ship drive main shaft installed inside the rear bearing, a first sealing sleeve and a second sealing sleeve installed at both ends of the rear bearing, an oil inlet pipe installed on the outer wall of the first sealing sleeve, an oil outlet pipe installed on the outer wall of the second sealing sleeve, a centrifugal oil guide mechanism fixedly installed on the outer wall of the ship drive main shaft, and the centrifugal oil guide mechanism is located inside the second sealing sleeve.

[0005] Preferably, bearing mounting holes are provided on both sides of the rear axle housing, and a first connecting flange is integrally provided on one side of the bearing mounting hole, and the rear axle housing is fixedly connected to the rear bearing through the bearing mounting hole, and through-holes are provided on both sides of the rear axle housing, and the inner wall of the through-hole is fixedly welded to the outer wall of the oil outlet pipe.

[0006] Preferably, a second connecting flange is integrally provided on one side of the rear bearing, and the second connecting flange and the first connecting flange are respectively located on both sides of the rear axle housing, and an oil guide groove is embedded in the inner wall of the rear bearing, and the number of the oil guide grooves is multiple, and the multiple oil guide grooves are distributed in parallel, and the multiple oil guide grooves are evenly distributed, and both ends of the rear bearing are embedded with limiting grooves.

[0007] Preferably, the first sealing sleeve has a side close to the rear bearing and the second sealing sleeve has a side close to the rear bearing with an embedded installation groove, and the inner walls of the two installation grooves are fixedly connected with sealing rings, and the surfaces of the two sealing rings are respectively in contact with the inner walls of the two limiting grooves.

[0008] Preferably, the first sealing sleeve is fixedly connected to the rear axle housing via a first connecting flange, the second sealing sleeve is fixedly connected to the rear bearing via a second connecting flange, and the first sealing sleeve and the second sealing sleeve are relatively distributed.

[0009] Preferably, the outer walls of the first sealing sleeve and the outer walls of the second sealing sleeve are both integrally provided with external through-tubes, and the first sealing sleeve is fixedly connected to the oil inlet pipe via the external through-tube, and the second sealing sleeve is fixedly connected to the oil outlet pipe via the external through-tube.

[0010] Preferably, a limit bearing is fixedly installed on the outer wall of the ship drive main shaft, and the number of the limit bearings is two, and the ship drive main shaft is rotationally connected to the first sealing sleeve and the second sealing sleeve through the two limit bearings respectively.

[0011] Preferably, sealing rings are fixedly mounted on the inner walls of the first sealing sleeve and the inner walls of the second sealing sleeve, and the surfaces of the sealing rings are slidingly connected to the outer wall of the ship's drive main shaft, and the shape of the sealing ring cross section is an eight-shaped shape, and the inner wall edge of the sealing ring is folded inward toward the side close to the rear bearing.

[0012] Preferably, the centrifugal oil guide mechanism includes a mechanism main ring, a centrifugal guide ring and a flow hole. The mechanism main ring is fixedly sleeved on the outer wall of the ship's drive main shaft, and the centrifugal guide ring is integrally arranged on the outer wall of the mechanism main ring. The flow hole is opened on both sides of the centrifugal guide ring, and the flow hole is close to the center of the centrifugal guide ring. There are multiple centrifugal guide rings, and the multiple centrifugal guide rings are distributed in parallel.

[0013] Preferably, the outer wall of the ship driving main shaft is slidably connected to the inner wall of the rear bearing, and the ship driving main shaft is located between the plurality of oil guide grooves.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The stern tube rear bearing oil guide groove, through the rear axle housing, rear bearing, ship drive main shaft, first sealing sleeve, second sealing sleeve, oil inlet pipe, oil outlet pipe, centrifugal oil guide mechanism, mounting groove, external through pipe, limit bearing, sealing ring and sealing ring, can adopt the oil guide groove design to directly transport lubricating oil to the stern tube rear bearing, thereby ensuring the thickness of the oil film established in the rear bearing to the greatest extent. Whether from theoretical calculation or practical application, it limits the occurrence of high temperature heating of the stern tube rear bearing due to insufficient oil supply.

[0016] 2. The stern tube rear bearing oil guide groove, through the main ring of the mechanism, the centrifugal guide ring and the flow hole, can drive the centrifugal oil guide mechanism to rotate synchronously when the ship's drive main shaft rotates. The centrifugal action of the centrifugal guide ring promotes the accelerated discharge of lubricating oil from the inside of the second sealing sleeve to the outside, thereby improving the lubricating oil circulation rate and the lubricating oil heat dissipation effect. At the same time, the parallel centrifugal guide rings have relatively small resistance when rotating, avoiding major obstruction to the rotation of the ship's drive main shaft and ensuring the normal operation of the ship's drive main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the side sectional structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the explosion structure of the present invention;

[0020] Figure 4 This is a structural schematic diagram of the centrifugal oil guide mechanism of the present invention;

[0021] Figure 5 It is a side sectional view of the centrifugal oil guide mechanism of the present invention;

[0022] Figure 6 This is a schematic structural diagram of the first sealing sleeve of the present invention;

[0023] Figure 7 It is a side sectional view of the first sealing sleeve of the present invention;

[0024] Figure 8 It is a schematic diagram of the rear bearing structure of the present invention.

[0025] In the figure: 1. rear axle housing; 101. bearing mounting hole; 102. first connecting flange; 103. through-hole; 2. rear bearing; 201. second connecting flange; 202. oil guide groove; 203. limiting groove; 3. ship drive main shaft; 4. first sealing sleeve; 5. second sealing sleeve; 6. oil inlet pipe; 7. oil outlet pipe; 8. centrifugal oil guide mechanism; 801. centrifugal guide ring; 802. flow hole; 9. mounting groove; 10. external through-tube; 11. limiting bearing; 12. sealing ring; 13. sealing ring. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-8 The stern tube rear bearing oil guide groove comprises: a rear axle housing 1 and a rear bearing 2. A ship drive main shaft 3 is installed inside the rear bearing 2. A first sealing sleeve 4 and a second sealing sleeve 5 are installed at both ends of the rear bearing 2. An oil inlet pipe 6 is installed on the outer wall of the first sealing sleeve 4. An oil outlet pipe 7 is installed on the outer wall of the second sealing sleeve 5. A centrifugal oil guide mechanism 8 is fixedly installed on the outer wall of the ship drive main shaft 3, and the centrifugal oil guide mechanism 8 is located inside the second sealing sleeve 5. By setting the rear axle housing 1 and the rear bearing 2 , the ship drive main shaft 3, the first sealing sleeve 4, the second sealing sleeve 5, the oil inlet pipe 6, the oil outlet pipe 7, the centrifugal oil guide mechanism 8, the mounting groove 9, the external through pipe 10, the limit bearing 11, the sealing ring 12 and the sealing ring 13. The oil guide groove 202 can be used to directly transport the lubricating oil to the stern tube rear bearing 2, thereby ensuring the oil film thickness of the rear bearing 2 to the greatest extent. Whether from theoretical calculation or practical application, the occurrence of high temperature heating accidents caused by insufficient oil supply to the stern tube rear bearing 2 is limited.

[0028] Among them; bearing mounting holes 101 are opened through both sides of the rear axle housing 1, and a first connecting flange 102 is integrally provided on one side of the bearing mounting hole 101, and the rear axle housing 1 is fixedly connected to the rear bearing 2 through the bearing mounting hole 101, and through holes 103 are opened through both sides of the rear axle housing 1, and the inner wall of the through hole 103 is fixedly welded to the outer wall of the oil outlet pipe 7, so that the oil outlet pipe 7 can pass from the outside of the rear axle housing 1 into the inside of the hull to ensure the circulation of lubricating oil, and at the same time provide effective support for the oil outlet pipe 7, thereby improving the stability of the oil outlet pipe 7.

[0029] Among them; a second connecting flange 201 is integrally provided on one side of the rear bearing 2, and the second connecting flange 201 and the first connecting flange 102 are respectively located on both sides of the rear axle housing 1, and an oil guide groove 202 is embedded in the inner wall of the rear bearing 2, and the number of the oil guide grooves 202 is multiple, and the multiple oil guide grooves 202 are distributed in parallel, and the multiple oil guide grooves 202 are evenly distributed, and both ends of the rear bearing 2 are embedded with limiting grooves 203 to facilitate the positioning of the sealing ring 13, and at the same time provide effective support and extrusion for the sealing ring 13, to ensure that the sealing ring 13 provides effective sealing for both ends of the rear bearing 2.

[0030] Among them, the first sealing sleeve 4 and the second sealing sleeve 5 are both embedded with mounting grooves 9 on one side close to the rear bearing 2, and the inner walls of the two mounting grooves 9 are fixedly connected with sealing rings 13, and the surfaces of the two sealing rings 13 are respectively fitted with the inner walls of the two limiting grooves 203, so that the sealing rings 13 can be used to provide sealing for the gap between the first sealing sleeve 4 and the second sealing sleeve 5 and the rear bearing 2, thereby avoiding leakage caused by leakage of lubricating oil between the first sealing sleeve 4, the second sealing sleeve 5 and the rear bearing 2.

[0031] Among them; the first sealing sleeve 4 is fixedly connected to the rear axle housing 1 through the first connecting flange 102, and the second sealing sleeve 5 is fixedly connected to the rear bearing 2 through the second connecting flange 201, and the first sealing sleeve 4 and the second sealing sleeve 5 are relatively distributed, so as to facilitate the fixed installation of the first sealing sleeve 4 and the second sealing sleeve 5 at both ends of the rear bearing 2 to ensure that the oil circulation is not affected when the ship's driving main shaft 3 rotates.

[0032] Among them, the outer wall of the first sealing sleeve 4 and the outer wall of the second sealing sleeve 5 are both integrally provided with an external through-tube 10, and the first sealing sleeve 4 is fixedly connected to the oil inlet pipe 6 through the external through-tube 10, and the second sealing sleeve 5 is fixedly connected to the oil outlet pipe 7 through the external through-tube 10, so as to form a lubricating oil flow path, ensure the unidirectional flow of lubricating oil, ensure the heat dissipation rate, and at the same time use the lubricating oil to take away impurities inside the machine.

[0033] Among them; a limit bearing 11 is fixedly installed on the outer wall of the ship drive main shaft 3, and the number of the limit bearings 11 is two, and the ship drive main shaft 3 is rotatably connected to the first sealing sleeve 4 and the second sealing sleeve 5 through two limit bearings 11 respectively, so that the limit bearings 11 can be used to provide lateral limitation, thereby preventing the ship drive main shaft 3 from easily sliding out from the rear bearing 2, thereby improving the stability of the ship drive main shaft 3.

[0034] Among them, the inner wall of the first sealing sleeve 4 and the inner wall of the second sealing sleeve 5 are fixedly installed with a sealing ring 12, and the surface of the sealing ring 12 is slidingly connected to the outer wall of the ship drive main shaft 3, and the shape of the sealing ring 12 cross section is an eight-shaped, and the inner wall edge of the sealing ring 12 is folded inward toward the side close to the rear bearing 2, so that the internal pressure formed by the lubricating oil can be used to squeeze the sealing ring 12 to form a seal, thereby avoiding easy leakage of the lubricating oil and ensuring that the ship drive main shaft 3 can rotate freely.

[0035] Among them; the centrifugal oil guide mechanism 8 includes a main ring, a centrifugal guide ring 801 and a flow hole 802. The main ring is fixedly sleeved on the outer wall of the ship drive main shaft 3. The centrifugal guide ring 801 is integrally arranged on the outer wall of the main ring. The flow hole 802 is opened on both sides of the centrifugal guide ring 801, and the flow hole 802 is close to the center of the centrifugal guide ring 801. There are multiple centrifugal guide rings 801, and the multiple centrifugal guide rings 801 are distributed in parallel. Through the main ring, centrifugal guide ring 801 and flow hole 802, the centrifugal oil guide mechanism 8 can be driven to rotate synchronously when the ship drive main shaft 3 rotates. The centrifugal action of the centrifugal guide ring 801 promotes the accelerated discharge of lubricating oil from the inside of the second sealing sleeve 5 to the outside, thereby improving the lubricating oil circulation rate and the lubricating oil heat dissipation effect. At the same time, the parallel centrifugal guide rings 801 have relatively small resistance when rotating, avoiding a large obstruction to the rotation of the ship drive main shaft 3 and ensuring the normal operation of the ship drive main shaft 3.

[0036] Among them; the outer wall of the ship drive main shaft 3 is slidingly connected to the inner wall of the rear bearing 2, and the ship drive main shaft 3 is located between multiple oil guide grooves 202, so that the multiple oil guide grooves 202 can evenly wrap the rear bearing 2, ensuring the external pressure balance of the rear bearing 2 while also ensuring that the oil guide grooves 202 form a more uniform heat dissipation for the rear bearing 2.

[0037] Working principle: when in use, connect the oil inlet pipe 6 to the pumping output end of the external lubricating oil storage device, and connect the oil outlet pipe 7 to the return end of the external lubricating oil storage device. When the ship's driving main shaft 3 rotates, the pumping output end of the external lubricating oil storage device continuously pumps the lubricating oil into the first sealing sleeve 4 through the oil inlet pipe 6. At the same time, the ship's driving main shaft 3 drives the centrifugal oil guide mechanism 8 to rotate, and the rotating centrifugal guide ring 801 continuously centrifugally swings the middle lubricating oil to the periphery, so that the lubricating oil is pumped out from the outside of the second sealing sleeve 5. The through pipe 10 discharges into the oil outlet pipe 7. At the same time, the pressure at the center of the centrifugal guide ring 801 decreases, and the lubricating oil enters the middle of the centrifugal guide ring 801 through the flow holes 802 on both sides and is continuously replenished. The faster the ship drive main shaft 3 rotates, the faster the centrifugal guide ring 801 rotates, the faster the lubricating oil movement rate, and the heat dissipation effect increases accordingly, so that the lubricating oil continuously enters the second sealing sleeve 5 through the oil guide groove 202 from the inside of the first sealing sleeve 4 and is discharged, thereby forming lubrication and cooling between the rear bearing 2 and the ship drive main shaft 3.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. The oil guide groove of the rear bearing of the stern tube is characterized by: include: A rear axle housing (1) and a rear bearing (2), wherein a ship drive main shaft (3) is installed inside the rear bearing (2), a first sealing sleeve (4) and a second sealing sleeve (5) are installed at both ends of the rear bearing (2), an oil inlet pipe (6) is installed on the outer wall of the first sealing sleeve (4), an oil outlet pipe (7) is installed on the outer wall of the second sealing sleeve (5), a centrifugal oil guide mechanism (8) is fixedly installed on the outer wall of the ship drive main shaft (3), and the centrifugal oil guide mechanism (8) is located inside the second sealing sleeve (5); Bearing mounting holes (101) are provided through both sides of the rear axle housing (1), and a first connecting flange (102) is integrally provided on one side of the bearing mounting hole (101), and the rear axle housing (1) is fixedly connected to the rear bearing (2) through the bearing mounting hole (101), and through holes (103) are provided through both sides of the rear axle housing (1), and the inner wall of the through hole (103) is fixedly welded to the outer wall of the oil outlet pipe (7); A second connecting flange (201) is integrally provided on one side of the rear bearing (2), and the second connecting flange (201) and the first connecting flange (102) are respectively located on both sides of the rear axle housing (1); an oil guide groove (202) is embedded in the inner wall of the rear bearing (2), and the number of the oil guide grooves (202) is multiple, and the multiple oil guide grooves (202) are distributed in parallel and evenly distributed; and limiting grooves (203) are embedded in both ends of the rear bearing (2); The centrifugal oil guide mechanism (8) comprises a mechanism main ring, a centrifugal guide ring (801) and a flow hole (802); the mechanism main ring is fixedly sleeved on the outer wall of the ship drive main shaft (3); the centrifugal guide ring (801) is integrally arranged on the outer wall of the mechanism main ring; the flow hole (802) is opened through both sides of the centrifugal guide ring (801), and the flow hole (802) is close to the center of the centrifugal guide ring (801); the number of the centrifugal guide rings (801) is multiple, and the multiple centrifugal guide rings (801) are distributed in parallel.

2. The stern tube rear bearing oil guide groove according to claim 1, characterized in that: The first sealing sleeve (4) has a side close to the rear bearing (2) and the second sealing sleeve (5) has a side close to the rear bearing (2) both of which are embedded with mounting grooves (9), and the inner walls of the two mounting grooves (9) are fixedly connected with sealing rings (13), and the surfaces of the two sealing rings (13) are respectively in contact with the inner walls of the two limiting grooves (203).

3. The stern tube rear bearing oil guide groove according to claim 1, characterized in that: The first sealing sleeve (4) is fixedly connected to the rear axle housing (1) via a first connecting flange (102), the second sealing sleeve (5) is fixedly connected to the rear bearing (2) via a second connecting flange (201), and the first sealing sleeve (4) and the second sealing sleeve (5) are relatively distributed.

4. The stern tube rear bearing oil guide groove according to claim 1, characterized in that: The outer walls of the first sealing sleeve (4) and the outer walls of the second sealing sleeve (5) are both integrally provided with an external through-tube (10), and the first sealing sleeve (4) is fixedly connected to the oil inlet pipe (6) via the external through-tube (10), and the second sealing sleeve (5) is fixedly connected to the oil outlet pipe (7) via the external through-tube (10).

5. The stern tube rear bearing oil guide groove according to claim 1, characterized in that: A limit bearing (11) is fixedly mounted on the outer wall of the ship drive main shaft (3), and the number of the limit bearings (11) is two. The ship drive main shaft (3) is rotationally connected to the first sealing sleeve (4) and the second sealing sleeve (5) via the two limit bearings (11).

6. The stern tube rear bearing oil guide groove according to claim 1, characterized in that: A sealing ring (12) is fixedly mounted on the inner wall of the first sealing sleeve (4) and the inner wall of the second sealing sleeve (5), and the surface of the sealing ring (12) is slidably connected to the outer wall of the ship's main drive shaft (3), and the shape of the sealing ring (12) is an eight-shaped cross section, and the inner wall edge of the sealing ring (12) is folded inward toward the side close to the rear bearing (2).

7. The stern tube rear bearing oil guide groove according to claim 1, characterized in that: The outer wall of the ship driving main shaft (3) is slidably connected to the inner wall of the rear bearing (2), and the ship driving main shaft (3) is located between the plurality of oil guide grooves (202).

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