Magnetic suspension type ship motor-driven propeller

Abstract

The utility model provides a magnetic suspension type ship motor-driven propeller which comprises a rotor, a stator and a flow guide mechanism. The stator comprises a machine shell, a coil fixing frame, a winding coil, a first fixing ring and a first annular magnet. The rotor comprises a magnet fixing frame arranged on the inner side of the coil fixing frame, a rotor magnet arranged on the magnet fixing frame, a propeller fixedly connected to the inner side of the magnet fixing frame, a second fixing ring fixedly connected to one end of the magnet fixing frame and a second annular magnet fixedly connected to the second fixing ring. The first annular magnet and the second annular magnet are opposite in homopolar mode, and the outer wall of the rotor and the inner wall of the stator are both covered with polytetrafluoroethylene films. The flow guide mechanism comprises a water outlet cover fixedly connected to one end of the outlet of the machine shell and a flow guide pipeline fixedly connected to the inner wall of the water outlet cover, flow guide plates are evenly distributed in the flow guide pipeline in the radial direction, the service life can be prolonged, working benefits are improved, and noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ship propellers, in particular to a magnetic suspension type ship motor driven propeller. Background Art

[0002] The main design concepts and structures of existing ship propellers include the following methods: First, the motor part of the propeller adopts a traditional shielded pump structure. Although this structure can effectively prevent the stator from entering water and has good insulation and anti-corrosion functions, this motor needs to use oil-lubricated bearings and a sealing ring structure. This structure has high sealing requirements, complex structure, and is prone to failure. The friction of the sealing ring is relatively large, which reduces the working efficiency and noise. When the motor is running, a large amount of eddy current loss will be generated. Therefore, the efficiency of this motor is only about 60%; the second method is that the propeller adopts an open method, water can enter the motor, stainless steel bearings or ceramic bearings are used, and there is a stainless steel anti-corrosion layer between the stator and the rotor. This structure is complex, the propeller volume is increased, the efficiency is low, and the bearing life is short; the third method is that the propeller adopts an open method, water can enter the motor, and water-lubricated bearings are used. This is limited by the bearing area of ​​the water-lubricated bearing, the power cannot be increased, and friction is generated when the thrust is large, and the life of the water-lubricated bearing is short. At present, there are some problems in these methods, and a better technical solution needs to be provided. Utility Model Content

[0003] The problem to be solved by the utility model is to provide a magnetic suspension type ship motor driven propeller, which can increase the service life, improve the working efficiency and reduce the noise.

[0004] To solve the above technical problems, a magnetic levitation ship motor-driven propeller provided by the utility model includes a rotor, a stator, and a flow guide mechanism; the stator includes a casing, a coil fixing frame arranged on the inner side of the casing, a winding coil arranged on the coil fixing frame, a first fixing ring fixedly connected to the inlet side of the casing, and a first annular magnet fixedly connected to the first fixing ring; the rotor includes a magnet fixing frame arranged on the inner side of the coil fixing frame, a rotor magnet arranged on the magnet fixing frame, a propeller fixedly connected to the inner side of the magnet fixing frame, a second fixing ring fixedly connected to one end of the magnet fixing frame, and a second annular magnet fixedly connected to the second fixing ring, the first annular magnet and the second annular magnet are opposite to each other with the same poles, and the outer wall of the rotor and the inner wall of the stator are covered with a polytetrafluoroethylene film; the flow guide mechanism includes a water outlet hood fixedly connected to one end of the outlet of the casing, a flow guide pipe fixedly connected to the inner wall of the water outlet hood, and guide plates are evenly distributed radially inside the flow guide pipe.

[0005] Preferably, the inner diameter of the output end of the water outlet cover is smaller than the inner diameter of the input end.

[0006] Preferably, the casing includes an outer cylinder part and an annular end cover, an outer edge of one end of the annular end cover is provided with a first limiting groove matching the outer cylinder part, one end of the outer cylinder part is sleeved on the first limiting groove, and an outer edge of the other end of the outer cylinder part is provided with a second limiting groove matching the input end of the water outlet cover, and the input end of the water outlet cover is sleeved on the second limiting groove.

[0007] Preferably, an annular limiting groove is provided on the circumferential edge of the inner wall of the output end of the annular end cover, the first fixing ring comprises a first annular portion fixedly arranged on the inner wall of the annular limiting groove, a first annular end face portion connected to the inner edge of one end of the first annular portion, an annular accommodating groove matching the first annular magnet is provided on the end face of the annular limiting groove, and the first annular magnet is arranged in the annular accommodating groove; the second fixing ring comprises a second annular portion matching the inner ring of the magnet fixing frame, a second annular end face portion connected to one end of the second annular portion, and an outer annular portion connected to the outer edge of the second annular end face portion, the magnet fixing frame is sleeved on one end of the second annular portion, and the second annular magnet is sleeved on the second annular portion and located on the inner side of the outer annular portion.

[0008] Preferably, the propeller includes a cylinder matching the inner ring of a magnet fixing frame, and a blade fixedly connected to the inner side of the cylinder, the magnet fixing frame is sleeved on one end of the cylinder, an annular limiting portion is provided on the outer edge of the cylinder, one end face of the magnet fixing frame is adjacent to one end face of the annular limiting portion, a first guide ring is sleeved on the other end of the cylinder, a second guide ring matching the first guide ring is provided on the inner ring of the outer cylinder, and the outer wall of the first guide ring is adjacent to the outer wall of the second guide ring.

[0009] Preferably, it further comprises a fixed hanger and a speed controller, wherein the fixed hanger is fixedly connected to the outside of the outer cylinder, a cavity is hollowly arranged inside the fixed hanger, and the speed controller is arranged in the cavity.

[0010] Preferably, the guide plate is arranged in a wedge shape.

[0011] Preferably, magnet receiving grooves matching the rotor magnets are evenly distributed on the outer wall of the magnet fixing frame, and the rotor magnets are arranged in the magnet receiving grooves.

[0012] The beneficial effects of the utility model are as follows: the utility model provides a magnetic levitation ship motor driven propeller. When the rotor rotates, driven by the rotation of the propeller, a water flow is formed from the inlet end of the casing to the outlet end of the water outlet cover. The water flow will generate a reverse thrust to the inlet end of the casing on the propeller, thereby driving the rotor to move toward the inlet end of the casing. Since a first annular magnet is arranged on the inlet side of the casing, and a second annular magnet corresponding to the first annular magnet is arranged on the front side of the rotor, when the second annular magnet gradually approaches the first annular magnet, the repulsion between the first annular magnet and the second annular magnet is The force will gradually increase, which can avoid the contact between the first fixing ring and the second fixing ring, so that the rotor is in a suspended state in the casing, without the use of bearings, thereby increasing the service life of the propeller and reducing the maintenance frequency and maintenance cost; by covering the outer wall of the rotor and the inner wall of the stator with polytetrafluoroethylene film, the corrosion protection effect of the rotor and stator on seawater is improved, ensuring the long-life and stable operation of the propeller; when the water flows through the diversion pipe, the guide plate can rectify the water flow, absorb the eddy current energy, and make the water flow spray out from the water outlet cover in a straight line, thereby improving the working efficiency of the propeller, reducing noise, and having good promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The schematic diagram of the appearance structure of the utility model is illustrated.

[0014] Figure 2 A cross-sectional view illustrating the present invention is shown.

[0015] Figure 3 The utility model is illustrated Figure 2 Schematic diagram of the partial enlarged structure of part A in the middle.

[0016] Figure 4 The utility model is illustrated Figure 2 Schematic diagram of the partial enlarged structure of part B in the middle.

[0017] Figure 5 The schematic diagram of the exploded structure of the utility model is illustrated.

[0018] Description of the accompanying drawings: rotor 1, magnet fixing frame 10, rotor magnet 11, propeller 12, cylinder 120, annular limiting portion 120a, blade 121, second fixing ring 13, second annular portion 130, second annular end surface portion 131, outer ring portion 132, second annular magnet 14, first guide ring 15, stator 2, casing 20, outer cylinder portion 200, second limiting groove 200a, annular end cover 201, first limiting groove 201a, annular limiting groove 201b, annular accommodating groove 201c, first fixing ring 22, first annular portion 220, first annular end surface portion 221, first annular magnet 23, second guide ring 24, diversion mechanism 3, water outlet cover 30, diversion pipe 31, guide plate 32, fixed hanger 4, speed controller 5. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments.

[0020] Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present disclosure.

[0021] refer to Figure 1-5 .

[0022] The utility model provides a magnetic suspension type ship motor drive propeller, comprising a rotor 1, a stator 2, and a flow guide mechanism 3; the stator 2 comprises a casing 20, a coil fixing frame 21 arranged inside the casing 20, a winding coil arranged on the coil fixing frame 21, a first fixing ring 22 fixedly connected to the inlet side of the casing 20, and a first annular magnet 23 fixedly connected to the first fixing ring 22; the rotor 1 comprises a magnet fixing frame 10 arranged inside the coil fixing frame 21, a rotor magnet 11 arranged on the magnet fixing frame 10, and a first annular magnet 23 fixedly connected to the magnet fixing frame 22. The propeller 12 is on the inner side of the iron fixing frame 10, the second fixing ring 13 is fixedly connected to one end of the magnet fixing frame 10, the second annular magnet 14 is fixedly connected to the second fixing ring 13, the first annular magnet 23 and the second annular magnet 14 are opposite to each other with the same poles, and the outer wall of the rotor 1 and the inner wall of the stator 2 are covered with a polytetrafluoroethylene film; the guide mechanism 31 includes a water outlet cover 30 fixedly connected to one end of the outlet of the casing 20, and a guide pipe 31 fixedly connected to the inner wall of the water outlet cover 30, and guide plates 32 are evenly distributed radially inside the guide pipe 31.

[0023] Its working principle is that when the rotor 1 rotates, driven by the rotation of the propeller 12, a water flow is formed from the inlet end of the casing 20 to the outlet end side of the water outlet cover 30, and the water flow will generate a reverse thrust to the inlet end side of the casing 20 on the propeller 12, thereby driving the rotor 1 to move toward the inlet end side of the casing 20. Since a first annular magnet 23 is provided on the inlet side of the casing 20, and a second annular magnet 14 corresponding to the first annular magnet 23 is provided on the front side of the rotor 1, when the second annular magnet 14 gradually approaches the first annular magnet 23, the repulsive force between the first annular magnet 23 and the second annular magnet 14 will gradually increase. The contact between the first fixing ring 22 and the second fixing ring 13 can be avoided, so that the rotor 1 is in a suspended state in the housing 20, and no bearing is needed, which increases the service life of the propeller and reduces the maintenance frequency and maintenance cost; by covering the outer wall of the rotor 1 and the inner wall of the stator 2 with a polytetrafluoroethylene film, the anti-corrosion effect of the rotor 1 and the stator 2 on seawater is improved, ensuring the long-life and stable operation of the propeller; when the water flows through the guide pipe 31, the guide plate 32 can rectify the water flow, absorb the eddy current energy, and make the water flow spray out from the water outlet cover 30 in a straight line, thereby improving the working efficiency of the propeller, reducing noise, and having good promotion. The first annular magnet 23 and the second annular magnet 14 can also be conical rings or other similar shapes, as long as they can generate repulsive force between the first fixing ring 22 and the second fixing ring 13, they should all fall within the protection scope of the utility model.

[0024] Based on the above embodiment, the inner diameter of the output end of the water outlet cover 30 is smaller than the inner diameter of the input end, which can reduce the vortex of water and make the direction of water jetting out of the water outlet cover 30 straighter, thereby improving the working efficiency of the propeller.

[0025] Based on the above embodiment, the casing 20 includes an outer cylinder portion 200 and an annular end cover 201. A first limiting groove 201a matching the outer cylinder portion 200 is arranged on the outer edge of one end of the annular end cover 201. One end of the outer cylinder portion 200 is sleeved on the first limiting groove 201a. A second limiting groove 200a matching the input end of the water outlet cover 30 is arranged on the outer edge of the other end of the outer cylinder portion 200. The input end of the water outlet cover 30 is sleeved on the second limiting groove 200a. This can improve the assembly stability between the outer cylinder portion 200 and the annular end cover 201, and between the outer cylinder portion 200 and the water outlet cover 30. The structure is more compact, the volume is reduced, and the resistance is reduced.

[0026] Based on the above embodiment, an annular limiting groove 201b is provided on the circumferential edge of the inner wall of the output end of the annular end cover 201, the first fixed ring 22 includes a first annular portion 220 fixedly provided on the inner wall of the annular limiting groove 201b, and a first annular end face portion 221 connected to the inner edge of one end of the first annular portion 220, and an annular accommodating groove 201c matching the first annular magnet 23 is provided on the end face of the annular limiting groove 201b, and the first annular magnet 23 is arranged in the annular accommodating groove 201c; the second fixed ring 13 includes a second annular portion 130 matching the inner ring of the magnet fixing frame 10, a second annular end face portion 131 connected to one end of the second annular portion 130, and an outer annular portion 132 connected to the outer edge of the second annular end face portion 131, the magnet fixing frame 10 is sleeved on one end of the second annular portion 130, and the second annular magnet 14 is sleeved on the second annular portion 130 and located on the inner side of the outer annular portion 132. The first fixing ring 22 and the second fixing ring 13 are both made of magnetic conductive metal. When the rotor 1 rotates, the reverse thrust generated by the water flow on the rotor 1 will drive the rotor 1 to approach the inlet end side of the casing 20. When the second annular magnet 14 gradually approaches the first annular magnet 23, the repulsive force between the first annular magnet 23 and the second annular magnet 14 will gradually increase, which can avoid contact and friction between the first fixing ring 22 and the second fixing ring 13, provide axial and radial positioning and retaining forces for the rotor 1, and make the rotor 1 in a suspended state in the casing 20 without the use of bearings, thereby improving the service life.

[0027] Based on the above embodiment, the propeller 12 includes a cylinder 120 matching the inner ring of the magnet fixing frame 10, and a blade 121 fixedly connected to the inner side of the cylinder 120. The magnet fixing frame 10 is sleeved on one end of the cylinder 120. An annular limiting portion 120a is provided on the outer edge of the cylinder 120. One end face of the magnet fixing frame 10 is adjacent to one end face of the annular limiting portion 120a. A first guide ring 15 is sleeved on the other end of the cylinder 120. A second guide ring 24 matching the first guide ring 15 is provided on the inner ring of the outer cylinder 200. The outer wall of the first guide ring 15 is adjacent to the outer wall of the second guide ring 24, which can play a guiding role, improve the structural stability of the rotor 1, improve the structural compactness of the rotor 1, reduce the volume of the propeller, reduce resistance, and improve work efficiency.

[0028] Based on the above embodiment, it also includes a fixed hanger 4 and a speed controller 5. The fixed hanger 4 is fixedly connected to the outside of the outer cylinder 200. The fixed hanger 4 is hollow inside with a chamber, and the speed controller 5 is arranged in the chamber. When the propeller is placed in water, the fixed hanger 4 is immersed in seawater, which can have a good cooling effect on the speed controller 5, and shorten the distance between the speed controller 5 and the winding coil of the rotor 1, reduce power loss, and improve efficiency.

[0029] Based on the above embodiment, the guide plate 32 is wedge-shaped. The wedge-shaped guide plate 32 faces the outlet of the water outlet cover 30, which can rectify the vortex, so that the water flow is ejected from the water outlet cover 30 in a straight line, improve the working efficiency of the propeller, and reduce noise.

[0030] Based on the above embodiment, magnet receiving grooves matching the rotor magnets 11 are evenly distributed on the outer wall of the magnet fixing frame 10, and the rotor magnets 11 are arranged in the magnet receiving grooves to improve the compactness of the structure, reduce the volume, and facilitate the assembly of the rotor magnets 11.

[0031] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A magnetically suspended ship motor-driven propeller, characterized in that: It comprises a rotor, a stator and a flow guiding mechanism; the stator comprises a casing, a coil fixing frame arranged on the inner side of the casing, a winding coil arranged on the coil fixing frame, a first fixing ring fixedly connected to the inlet side of the casing, and a first annular magnet fixedly connected to the first fixing ring; the rotor comprises a magnet fixing frame arranged on the inner side of the coil fixing frame, a rotor magnet arranged on the magnet fixing frame, a propeller fixedly connected to the inner side of the magnet fixing frame, a second fixing ring fixedly connected to one end of the magnet fixing frame, and a second annular magnet fixedly connected to the second fixing ring, the first annular magnet and the second annular magnet have opposite poles, and the outer wall of the rotor and the inner wall of the stator are covered with a polytetrafluoroethylene film; the flow guiding mechanism comprises a water outlet cover fixedly connected to one end of the outlet of the casing, and a flow guiding pipe fixedly connected to the inner wall of the water outlet cover, and flow guiding plates are evenly distributed radially inside the flow guiding pipe.

2. A magnetically suspended ship motor-driven propeller according to claim 1, characterized in that: The inner diameter of the output end of the water outlet cover is smaller than the inner diameter of the input end.

3. A magnetically suspended ship motor-driven propeller according to claim 2, characterized in that: The casing includes an outer cylinder part and an annular end cover, wherein an outer edge of one end of the annular end cover is provided with a first limiting groove matching the outer cylinder part, one end of the outer cylinder part is sleeved on the first limiting groove, and an outer edge of the other end of the outer cylinder part is provided with a second limiting groove matching the input end of the water outlet cover, and the input end of the water outlet cover is sleeved on the second limiting groove.

4. The magnetic levitation ship motor-driven propeller according to claim 3, characterized in that: An annular limiting groove is arranged on the circumferential edge of the inner wall of the annular end cover output end, the first fixing ring comprises a first annular portion fixedly arranged on the inner wall of the annular limiting groove, a first annular end face portion connected to the inner edge of one end of the first annular portion, an annular accommodating groove matching the first annular magnet is arranged on the end face of the annular limiting groove, and the first annular magnet is arranged in the annular accommodating groove; the second fixing ring comprises a second annular portion matching the inner ring of the magnet fixing frame, a second annular end face portion connected to one end of the second annular portion, and an outer annular portion connected to the outer edge of the second annular end face portion, the magnet fixing frame is sleeved on one end of the second annular portion, and the second annular magnet is sleeved on the second annular portion and located on the inner side of the outer annular portion.

5. The magnetic levitation ship motor-driven propeller according to claim 4, characterized in that: The propeller includes a cylinder body matching the inner ring of the magnet fixing frame and a blade fixedly connected to the inner side of the cylinder body. The magnet fixing frame is sleeved on one end of the cylinder body, an annular limiting portion is provided on the outer edge of the cylinder body, one end face of the magnet fixing frame is adjacent to one end face of the annular limiting portion, a first guide ring is sleeved on the other end of the cylinder body, a second guide ring matching the first guide ring is provided on the inner ring of the outer cylinder part, and the outer wall of the first guide ring is adjacent to the outer wall of the second guide ring.

6. The magnetic levitation ship motor-driven propeller according to claim 3, characterized in that: It also includes a fixed hanger and a speed controller. The fixed hanger is fixedly connected to the outside of the outer cylinder. A cavity is hollow inside the fixed hanger, and the speed controller is arranged in the cavity.

7. The magnetic levitation ship motor-driven propeller according to claim 1, characterized in that: The guide plate is arranged in a wedge shape.

8. The magnetic levitation ship motor-driven propeller according to claim 1, characterized in that: Magnet receiving grooves matching the rotor magnets are evenly distributed on the outer wall of the magnet fixing frame, and the rotor magnets are arranged in the magnet receiving grooves.

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