Combined thrust bearing mechanism suitable for reinforced propeller in ice region
By adopting a combined thrust bearing mechanism in the ice zone thrust propeller, and using back-to-back mounted spherical roller thrust bearings and radial support bearings, the reliability and structural complexity of existing thrust bearings in the ice zone thrust propeller are solved, achieving high reliability and low loss effects.
Patent Information
- Application Number
- CN202411856706.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-05-02
AI Technical Summary
Existing thrust bearings have reliability and structural complexity problems in ice-zone thrusters, which are prone to bearing edge crushing and bias grinding, which increases maintenance costs and hidden dangers.
A combined thrust bearing mechanism is adopted, including two sets of spherical roller thrust bearings installed back to back and a radial support bearing. Through structures such as tight springs and bearing partitions, effective bearings are achieved.
This design reduces production costs, simplifies axial clearance adjustment, improves centering performance, can adapt to the shaft misalignment working conditions, avoid internal stress, has the advantages of high load-bearing capacity and low loss, and improves the reliability of bearing components.
Smart Images
Figure CN119914613A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of combined thrust bearings, and in particular to a combined thrust bearing mechanism suitable for ice-region reinforced propellers. Background Art
[0002] The thrust bearing component transmits the thrust generated by the propeller to the ship through the propeller shaft system and drives the ship forward. The thrust bearing component plays a vital role in the field of propellers and is one of the core components of the propeller and even the entire ship. For propellers in ice areas, the reliability and advancement of the thrust bearing component directly represent the technical level of the entire propeller.
[0003] The structural form, assembly method, lubrication, cooling performance, etc. of thrust bearing components are the key assessment points of thrust bearing components and are also the key factors affecting the life of thrust bearing components. Most of the commonly used thrust bearings now use two pairs of spherical roller thrust bearings arranged in face-to-face contact (refer to the attached manual). Figure 3 As shown). Two pairs of spherical roller thrust bearings need to bear axial thrust and radial loads in two directions at the same time. The outer ring of the thrust bearing contacts the bearing seat, so a reasonable matching tolerance needs to be set. If the tolerance setting is unreasonable, there will be a risk of crushing the bearing edge. Since the rotation centers do not overlap, while taking into account the multi-directional load, the spherical roller thrust bearing will suffer from eccentric wear. At the same time, the overly complicated structural configuration not only increases the initial cost investment, but also increases the maintenance cost during use, which lays a hidden danger for the reliability of the entire component.
[0004] In order to solve the above problems, we propose a combined thrust bearing mechanism suitable for ice-reinforced thrusters to solve the above problems. Summary of the invention
[0005] In order to solve the problems in the background technology, the present invention provides a combined thrust bearing mechanism suitable for an ice-reinforced propeller.
[0006] To achieve the above object, the technical solution adopted by the present invention is: A combined thrust bearing mechanism suitable for an ice-enhanced thruster, comprising a bearing seat and a pump shaft rotatably mounted in the middle of the inner side of the bearing seat, wherein two sets of spherical roller thrust bearings are arranged at the inner left end of the bearing seat, the two sets of spherical roller thrust bearings are mounted back to back, and a tightening spring is arranged in the middle of the two sets of spherical roller thrust bearings; A radial support bearing is arranged at the inner right end of the bearing seat, and the radial support bearing is located in the middle of the right end of the spherical roller thrust bearing; a bearing spacer ring is arranged between the radial support bearing and the spherical roller thrust bearing, and the bearing spacer ring is fixedly installed in the middle of the pump shaft and is used for axial positioning of the spherical roller thrust bearing located on the right side.
[0007] Preferably, a positioning sleeve is provided at the middle of the left end of the spherical roller thrust bearing, and the positioning sleeve is fixedly installed at the middle of the left end of the pump shaft and is used for axially positioning the spherical roller thrust bearing located on the left side.
[0008] Preferably, the spherical roller thrust bearing and the radial support bearing are both fixedly mounted on the outer surface of the pump shaft through multiple sets of hydraulic nuts, and the rotation center of the radial support bearing coincides with the rotation center of the spherical roller thrust bearing.
[0009] Preferably, an oil chamber is installed in the middle of the left end of the bearing seat, and the left end of the pump shaft is movably installed in the middle of the inner side of the oil chamber.
[0010] Preferably, a left baffle cover is provided in the middle of the left end of the bearing seat, and a right baffle cover is provided in the middle of the right end of the bearing seat. The left baffle cover and the right baffle cover are respectively fixedly installed on the two ends of the bearing seat by multiple sets of fasteners.
[0011] Preferably, the right baffle cover is located in the middle of the right end of the radial support bearing, and the right baffle cover is used to axially position the radial support bearing. An anti-rotation pin is provided on the upper side of the right end of the radial support bearing, and the anti-rotation pin is used to position the outer ring of the radial support bearing.
[0012] Preferably, a sealing ring is provided at the connection between the right stopper cover and the bearing seat.
[0013] Preferably, an inner seal is provided in the middle of the right end of the bearing seat.
[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a simple bearing combination structure with low production cost, convenient axial clearance adjustment, good self-aligning performance, and the ability to adapt to shaft misalignment conditions. It will not generate internal stress and has the advantages of high load-bearing capacity and reduced loss. The structure mainly adopts two sets of spherical roller thrust bearings and one radial support bearing. The two sets of spherical roller thrust bearings are arranged back to back on the same side of the radial support bearing and are responsible for bearing axial thrusts in two directions, while the radial force is borne by the radial support bearing. Through a simple and reasonable bearing combination method, the structure can withstand complex load conditions and improve the reliability of the bearing components. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 The enlarged view of point A in the middle; Figure 3 It is a schematic diagram of the structure of a common thrust bearing mentioned in the background technology of the present invention.
[0016] In the figure: 1. oil chamber; 2. pump shaft; 3. hydraulic nut; 4. positioning sleeve; 5. left stopper cover; 6. spherical roller thrust bearing; 7. tightening spring; 8. bearing seat; 9. bearing spacer ring; 10. radial support bearing; 11. anti-rotation pin; 12. sealing ring; 13. fastener; 14. right stopper cover; 15. inner seal. DETAILED DESCRIPTION
[0017] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: by adopting two pairs of spherical roller thrust bearings 6 and a radial support bearing 10, wherein the two groups of spherical roller thrust bearings 6 are arranged back to back on the same side of the radial support bearing 10, the spherical roller thrust bearings 6 bear axial force, and the radial support bearing 10 bears radial force. The production cost is low, the axial clearance is easy to adjust, and it has good self-aligning performance. It can adapt to the working condition of shaft misalignment, and will not generate internal stress. It has the advantages of high load-bearing capacity and reduced loss.
[0018] Example: Refer to Figure 1 - Figure 3 As shown, a combined thrust bearing mechanism suitable for an ice-enhanced thruster in an ice zone is provided in this embodiment, including a bearing seat 8 and a pump shaft 2 rotatably mounted in the middle of the inner side of the bearing seat 8; two groups of spherical roller thrust bearings 6 are arranged at the inner left end of the bearing seat 8, the two groups of spherical roller thrust bearings 6 are mounted back to back, and a tightening spring 7 is arranged in the middle of the two groups of spherical roller thrust bearings 6; a radial support bearing 10 is arranged at the inner right end of the bearing seat 8, and the radial support bearing 10 is located in the middle of the right end of the spherical roller thrust bearing 6.
[0019] The spherical roller thrust bearing 6 and the radial support bearing 10 bear the axial force and the radial force respectively, so that the bearing capacity is high and the service life is long.
[0020] A bearing spacer ring 9 is provided between the radial support bearing 10 and the spherical roller thrust bearing 6. The bearing spacer ring 9 is fixedly mounted in the middle of the pump shaft 2 and is used for axial positioning of the spherical roller thrust bearing 6 located on the right side.
[0021] A positioning sleeve 4 is provided at the middle of the left end of the spherical roller thrust bearing 6. The positioning sleeve 4 is fixedly installed at the middle of the left end of the pump shaft 2 and is used to axially position the spherical roller thrust bearing 6 located on the left side.
[0022] The spherical roller thrust bearing 6 and the radial support bearing 10 are both fixedly mounted on the outer surface of the pump shaft 2 through multiple sets of hydraulic nuts 3, and are installed or disassembled using hydraulic pressure, which makes the operation convenient and the maintenance cost low.
[0023] The rotation center of the radial support bearing 10 coincides with the rotation center of the spherical roller thrust bearing 6 , thereby effectively preventing deflection of the pump shaft 2 during rotation, which would cause abnormal wear of the spherical roller thrust bearing 6 .
[0024] An oil chamber 1 is installed in the middle of the left end of the bearing seat 8, and the left end of the pump shaft 2 is movably installed in the middle of the inner side of the oil chamber 1; wherein, the oil chamber 1 increases the oil storage volume of the bearing seat 8 to ensure that the spherical roller thrust bearing 6 and the radial support bearing 10 are fully lubricated and cooled.
[0025] In order to prevent the lubricating oil in the bearing seat 8 from being drained, a retaining platform pressure cover 5 is provided at the middle of the left end of the bearing seat 8 to ensure that the rollers at the bottom of the bearing are submerged in the lubricating oil.
[0026] In some examples, a right stopper cover 14 is provided in the middle of the right end of the bearing seat 8 , and the left stopper cover 5 and the right stopper cover 14 are fixedly installed at both ends of the bearing seat 8 by multiple sets of fasteners 13 .
[0027] In some examples, the right baffle cover 14 is located in the middle of the right end of the radial support bearing 10, and the right baffle cover 14 is used to axially position the radial support bearing 10. An anti-rotation pin 11 is provided on the upper side of the right end of the radial support bearing 10, and the anti-rotation pin 11 is used to position the outer ring of the radial support bearing 10, mainly to prevent the outer ring of the radial support bearing 10 from rotating with the roller.
[0028] In some examples, a sealing ring 12 is provided at the connection between the right stopper cover 14 and the bearing seat 8, mainly for sealing the lubricating oil in the bearing seat 8 to prevent leakage.
[0029] In some examples, an inner seal 15 is provided in the middle of the right end of the bearing seat 8, and the entire bearing component is axially sealed by a sealing frame inside the inner seal 15. When the pump shaft 2 rotates, the inner seal 15 will form an oil film on the rotating surface to achieve oil pressure balance and prevent leakage of lubricating oil.
[0030] The working principle of the present invention is: Through a simple and reasonable bearing combination method, it can withstand complex load conditions and improve the reliability of bearing components. A pair of standard spherical roller thrust bearings 6 are used for back-to-back installation. When installed back-to-back, the load action center is outside the center line of the bearing, the span between the intersections is large, and the cantilever length is small, so the cantilever end has a large stiffness. When the pump shaft 2 is heated and elongated, the clearance of the spherical roller thrust bearing 6 increases, so that the spherical roller thrust bearing 6 will not be stuck and damaged; the back-to-back installation can withstand axial loads in two directions, providing a relatively high rigidity bearing configuration, and can withstand overturning torque. The radial support bearing 10 bears radial force, and the rotation center of the spherical roller thrust bearing 6 coincides with the rotation center of the radial support bearing 10, avoiding deflection when the pump shaft 2 rotates, resulting in abnormal wear of the spherical roller thrust bearing 6.
[0031] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A combined thrust bearing mechanism suitable for ice-enhanced propellers, characterized in that: It comprises a bearing seat (8) and a pump shaft (2) rotatably mounted in the middle of the inner side of the bearing seat (8), two sets of spherical roller thrust bearings (6) are arranged at the inner left end of the bearing seat (8), the two sets of spherical roller thrust bearings (6) are mounted back to back, and a tension spring (7) is arranged in the middle of the two sets of spherical roller thrust bearings (6); A radial support bearing (10) is provided at the inner right end of the bearing seat (8), and the radial support bearing (10) is located in the middle of the right end of the spherical roller thrust bearing (6); A bearing spacer ring (9) is provided between the radial support bearing (10) and the spherical roller thrust bearing (6); the bearing spacer ring (9) is fixedly mounted in the middle of the pump shaft (2) and is used to axially position the spherical roller thrust bearing (6) located on the right side.
2. The combined thrust bearing mechanism suitable for ice-enhanced propeller according to claim 1, characterized in that: A positioning sleeve (4) is provided at the middle of the left end of the spherical roller thrust bearing (6); the positioning sleeve (4) is fixedly mounted at the middle of the left end of the pump shaft (2) and is used to axially position the spherical roller thrust bearing (6) located on the left side.
3. The combined thrust bearing mechanism suitable for ice-enhanced propeller according to claim 2, characterized in that: The spherical roller thrust bearing (6) and the radial support bearing (10) are both fixedly mounted on the outer surface of the pump shaft (2) via a plurality of sets of hydraulic nuts (3), and the rotation center of the radial support bearing (10) coincides with the rotation center of the spherical roller thrust bearing (6).
4. The combined thrust bearing mechanism suitable for ice-enhanced propeller according to claim 3, characterized in that: An oil chamber (1) is installed in the middle of the left end of the bearing seat (8), and the left end of the pump shaft (2) is movably installed in the middle of the inner side of the oil chamber (1).
5. The combined thrust bearing mechanism suitable for ice-enhanced propeller according to claim 4, characterized in that: A left stopper cover (5) is provided at the middle of the left end of the bearing seat (8), and a right stopper cover (14) is provided at the middle of the right end of the bearing seat (8). The left stopper cover (5) and the right stopper cover (14) are respectively fixedly mounted at the two ends of the bearing seat (8) by means of a plurality of sets of fasteners (13).
6. The combined thrust bearing mechanism suitable for ice-enhanced propeller according to claim 5, characterized in that: The right stopper cover (14) is located in the middle of the right end of the radial support bearing (10), and the right stopper cover (14) is used to axially position the radial support bearing (10). An anti-rotation pin (11) is provided on the upper side of the right end of the radial support bearing (10), and the anti-rotation pin (11) is used to position the outer ring of the radial support bearing (10).
7. The combined thrust bearing mechanism suitable for ice-strengthened propeller according to claim 6, characterized in that: A sealing ring (12) is provided at the connection between the right stopper cover (14) and the bearing seat (8).
8. The combined thrust bearing mechanism suitable for ice-enhanced propeller according to claim 7, characterized in that: An inner sealing member (15) is provided at the middle portion of the right end of the bearing seat (8).