Elastic mounting shaftless thruster capable of wet dock disassembly and maintenance

Abstract

The present invention relates to an elastically mounted shaftless thruster that can be disassembled and maintained in a wet dock. The two ends of the cylinder are cylinders, and the middle is a U-shaped cylinder for arranging a shaftless propeller. The two axial ends of the U-shaped cylinder provide support for the support members of the shaftless propeller through a plurality of U-shaped seats respectively; the upper end of the shaftless propeller is connected to the upper end of the U-shaped cylinder and the cover plate of the cylinder through an elastic sealing mechanism. The cylinders on both sides of the cylinder are connected to the target ship tunnel cylinder by welding. The present invention replaces the traditional thruster with a shaftless thruster, and solves the problem of high vibration and noise of the thruster with an elastic connection method; at the same time, the advantage of the compact axial size of the shaftless thruster is used to solve the problem of limited installation space; and a detachable + sealing design is used to solve the problem of inconvenient disassembly and maintenance of the thruster. It only needs to ensure that the waterline is not higher than the tunnel cylinder to disassemble and repair the thruster, and can continue to perform navigation tasks that do not require a thruster function.

Description

Technical Field

[0001] The invention relates to a ship power propulsion system, in particular to a ship power shaftless thruster. Background Art

[0002] Ship thrusters improve the displacement and positioning functions of the hull and have been widely used in various types of ships. The thrusters on the market are divided into traditional thrusters and new shaftless thrusters. Traditional thrusters are conventional equipment with mature technology and low cost, but they are noisy and vibrate a lot; shaftless thrusters are favored by high-end ships such as scientific research ships and survey ships because of their low noise and low vibration advantages, but they are technically difficult and costly, and are mainly imported domestically. The existing traditional thrusters and shaftless thrusters still have the following shortcomings:

[0003] 1. The traditional thruster adopts a mechanical transmission propeller, which has a large axial dimension and cannot be installed on ships with a small bow (stern) installation space. Furthermore, this type of thruster often adopts a power transmission form in which the motor drives the gearbox to transmit torque to the propeller, which causes large mechanical vibration.

[0004] 2. Once equipment failure occurs, it needs to be disassembled in dry dock. The entire maintenance cycle is long, and no navigation missions can be performed during this period. For imported new shaftless thrusters, the dry dock repair cycle may be even longer.

[0005] 3. The thruster is rigidly connected as a whole. Even though the shaftless thruster has the characteristics of low noise and low vibration, the vibration transmitted during operation is still large, and the underwater radiation noise also increases accordingly, without better vibration filtering. Summary of the invention

[0006] The present invention aims to provide an elastically mounted shaftless thruster that can be disassembled and maintained in a wet dock, take measures to solve the deficiencies of existing thrusters, improve the comfort, maintainability and practicality of the thrusters, and promote the promotion and application of high-performance thrusters.

[0007] To achieve the above-mentioned purpose, the technical solution of the present invention is: an elastically mounted shaftless thruster that can be disassembled and maintained in a wet dock, comprising a cylinder, a support, an elastic sealing mechanism, a shaftless propeller, and a cover plate, wherein the two ends of the cylinder are cylinders and the middle is a U-shaped cylinder for arranging the shaftless propeller, and the axial ends of the U-shaped cylinder are respectively connected to the support members of the shaftless propeller through a plurality of U-shaped seats; the upper end of the shaftless propeller is connected to the upper end of the U-shaped cylinder of the cylinder and the cover plate through an elastic sealing mechanism.

[0008] Furthermore, the cylinders on both sides of the cylinder body are butt-jointed with the target ship pipe cylinder body by welding.

[0009] Furthermore, the elastic sealing mechanism includes a conical plate, an elastic ring, and a connecting plate, and the connecting plate is connected to the shaftless propeller and the conical plate; the elastic ring is arranged at two locations, one between the upper end of the cylinder and the connecting plate, and the other between the cover plate and the conical plate; the elastic rings at the two locations play a role in elastic mounting and sealing.

[0010] Furthermore, there are eight support members arranged on the end cover surface of the shaftless propeller, with four arranged on each end surface. The protruding column part on the base of the support member is covered with an elastic sleeve, which can play a vibration reduction and buffering role. The support member is provided with supporting force by a U-shaped seat on the end surface of the U-shaped cylinder.

[0011] Furthermore, the overall structure of the shaftless propeller is annular, the permanent magnet motor and the blade structure are integrated together, the blades are directly driven by the motor rotor, and the thrust generated by the blades is transmitted to the cylinder through the water-lubricated bearing, and then transmitted to the hull.

[0012] Furthermore, the shaftless propeller is provided with a flange opening at the upper end, which is connected to the connecting plate, and the two end surfaces are connected to the supporting member.

[0013] Furthermore, the cover plate is fixedly connected to the upper end of the cylinder, and an elastic ring is provided between the cover plate and the conical plate.

[0014] The beneficial effects of the present invention are:

[0015] 1. Use shaftless thrust device to replace the traditional thrust device to solve the problem of high vibration and noise of the thrust device; at the same time, take advantage of the compact axial size of the shaftless thrust device to solve the problem of limited installation space;

[0016] 2. The detachable + sealed design solves the problem of inconvenient disassembly and maintenance of the thruster. As long as the waterline is not higher than the tunnel body, the thruster can be disassembled for maintenance, and the navigation mission without the thruster function can be continued;

[0017] 3. Use elastic connection to optimize vibration transmission during the working state of the thruster and reduce underwater radiation noise.

[0018] Through the above invention design, the comfort, maintainability and practicality of the side thrust device can be improved, and the side thrust device can be promoted to be applied at a high level. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional view of the structure of the shaftless thrust device of the present invention;

[0020] Figure 2 It is a schematic diagram of the arrangement of the shaftless propeller and the supporting parts;

[0021] Figure 3 It is a schematic diagram of the arrangement of the support and the U-shaped seat;

[0022] In the figure: 1. cylinder, 2. support, 3. elastic sealing mechanism, 4. shaftless propeller, 5. cover plate, 6. cylinder 1, 7. U-shaped cylinder, 8. U-shaped seat, 9. cylinder 2, 10. conical plate, 11. elastic ring 1, 12. elastic ring 2, 13. connecting plate, 14. stator, 15. rotor, 16. blades, 17. water-lubricated bearing. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figures 1 to 3 As shown, an elastically mounted shaftless thruster that can be disassembled and maintained in a wet dock comprises a cylinder 1, a support member 2, an elastic sealing mechanism 3, a shaftless thruster 4, a cover plate 5, a conical plate 10, an elastic ring 11, an elastic ring 2 12, and a connecting plate 13.

[0025] The cylinder 1 6 and cylinder 2 9 on both sides of the cylinder 1 of the thrust device are installed with the pipe and barrel of the target ship by welding; U-shaped seats 8 are arranged on the inner end faces of the U-shaped cylinder 7 in the cylinder 1 in the axial direction, with a total of 8, 4 on each end face, 2 on the top and 2 on the bottom, and the two end faces are arranged symmetrically, and the U-shaped seats 8 above each end face near the outlet of the U-shaped cylinder 7 will not block the use of the U-shaped seats 8 below in the vertical direction. After the shaftless propeller 4 is connected to the connecting plate 13 at the upper end of the cylinder 1 and the conical plate 10 by bolts and screws, an elastic ring 11 is arranged on the open end face of the cylinder 1, and the shaftless propeller 4 and the connecting plate 13 are gradually put in from the top of the opening of the cylinder 1 downward until the support members 2 on the shaftless propeller 4 are in contact with the corresponding U-shaped seats 8, and the connecting plate 13 is finally pressed on the elastic ring 11.

[0026] The second elastic ring 12 is arranged on the inclined surface of the conical plate, and then the cover plate 5 is covered from top to bottom to press the second elastic ring 12, and the cover plate 5 is connected to the outer edge of the U-shaped tube 7 by bolts.

[0027] When the shaftless propeller 4 is working, the stator 14 remains stationary, the rotor 15 starts to rotate, and drives the blades 16 in the water to rotate together. After the thrust generated by the blades, the water-lubricated bearing 17 propels the hull to the shell of the shaftless propeller 4. The thrust is transmitted to the elastic ring 2 12 via the connecting plate 13 connected to the shaftless propeller 4, and then transmitted to the cylinder 1 through the cover plate 5, and finally transmitted to the hull. Support members 2 are arranged on the front and rear end surfaces of the shaftless propeller 4, corresponding to the U-shaped seat 8 on the U-shaped cylinder 7. The support member 2 provides support force and buffering constraints for the shaftless propeller. The protruding column part of the support member 2 is covered with elastic material, which can absorb the vibration generated during work and play a buffering role, which can reduce underwater radiation noise.

[0028] When the thruster is disassembled for maintenance, the cover plate 5 is installed to seal the thruster tunnel, and the ship can continue to perform navigation tasks without the thruster.

Claims

1. An elastically mounted shaftless thruster capable of wet dock disassembly and maintenance, comprising a cylinder, a support, an elastic sealing mechanism, a shaftless thruster, and a cover plate, characterized in that: The two ends of the cylinder body are cylinders, and the middle is a U-shaped cylinder, which is used to arrange the shaftless propeller. The axial ends of the U-shaped cylinder are respectively connected to the support members of the shaftless propeller through a plurality of U-shaped seats; the upper end of the shaftless propeller is connected to the upper end of the U-shaped cylinder of the cylinder body and the cover plate through an elastic sealing mechanism; when the thruster is disassembled for maintenance, the cover plate is installed to seal the thruster tunnel channel, so that the ship can continue to carry out navigation tasks without the participation of the thruster.

2. The elastically mounted shaftless thrust device capable of wet dock disassembly and maintenance according to claim 1 is characterized in that: The cylinders on both sides of the cylinder body are butt-jointed with the target ship pipe cylinder body by welding.

3. The elastically mounted shaftless thrust device capable of wet dock disassembly and maintenance according to claim 1 is characterized in that: The elastic sealing mechanism includes a conical plate, an elastic ring, and a connecting plate, wherein the connecting plate is connected to the shaftless propeller and the conical plate; the elastic ring is arranged at two locations, one between the upper end of the cylinder and the connecting plate, and the other between the cover plate and the conical plate; the elastic rings at the two locations play a role in elastic installation and sealing.

4. The elastically mounted shaftless thrust device capable of wet dock disassembly and maintenance according to claim 1 is characterized in that: There are eight support members, which are arranged on the end cover surface of the shaftless propeller, with four arranged on each end surface. The protruding column part on the base of the support member is covered with an elastic sleeve, which can play a vibration reduction and buffering role. The support member is provided with supporting force by the U-shaped seat on the end surface of the U-cylinder.

5. The elastically mounted shaftless thrust device capable of wet dock disassembly and maintenance according to claim 1 is characterized in that: The overall structure of the shaftless propeller is annular, the permanent magnet motor and the blade structure are integrated together, the blade is directly driven by the motor rotor, and the thrust generated by the blade is transmitted to the side thrust cylinder through the water-lubricated bearing, and then transmitted to the hull.

6. The elastically mounted shaftless thrust device capable of wet dock disassembly and maintenance according to claim 1 is characterized in that: The upper end of the shaftless propeller is provided with a flange opening which is connected to the connecting plate, and the two end surfaces are connected to the supporting member.

7. The elastically mounted shaftless thrust device capable of wet dock disassembly and maintenance according to claim 1 is characterized in that: The cover plate is fixedly connected to the upper end of the cylinder, and an elastic ring is arranged between the cover plate and the conical plate.

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