CN212354371U - Annular electric propeller supported by magnetic-liquid composite suspension bearing - Google Patents
Annular electric propeller supported by magnetic-liquid composite suspension bearing Download PDFInfo
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- CN212354371U CN212354371U CN202020661395.0U CN202020661395U CN212354371U CN 212354371 U CN212354371 U CN 212354371U CN 202020661395 U CN202020661395 U CN 202020661395U CN 212354371 U CN212354371 U CN 212354371U
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- 239000000725 suspension Substances 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 230000005389 magnetism Effects 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 82
- 239000006194 liquid suspension Substances 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 10
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- 230000005540 biological transmission Effects 0.000 abstract description 13
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
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Abstract
The utility model relates to an annular electric power propeller that compound suspension bearing of magnetism liquid supported, include: the device comprises a shell, a rim type motor, a magnetic-liquid composite suspension bearing system and a propeller. The utility model discloses a arrange the permanent magnet brushless motor of aquatic in and directly drive no hub formula screw and rotate, saved middle drive mechanism, rotor and screw subassembly are supported by the compound suspension bearing system of magnetism liquid and are transmitted motor and hull with thrust on, reduce the middle transmission loss between the motor to the screw, raise the efficiency, simplify propulsion system structure, reduce noise and vibration etc..
Description
Technical Field
The utility model belongs to the technical field of marine propeller among the boats and ships turbine, concretely relates to annular electric power propeller that compound suspension bearing of magnetism liquid supported.
Background
With the development of electric propulsion technology, electric propulsion systems are increasingly used on ships. Common electric propulsion systems include change-speed gearboxes, shafting (including shafts, couplings, various bearings and bearing blocks, stern tube seals), propellers, etc.; the propulsion mode of the electric propulsion system is that after the speed change gear box is driven by the motor to decelerate, the drive shafting and the propeller rotate to generate the thrust of advancing or retreating the ship, as shown in fig. 1. This propulsion method has the following problems: the structure is complex, the number of parts is large, the failure rate is high, the occupied space is large, and the weight is heavy; the propulsion efficiency is low: the motor and the propeller are driven by components such as a gear, a shaft system and the like, the gear is meshed to generate energy loss, and meanwhile, the bearing is usually a sliding bearing, so that the friction force is large and the friction power consumption is large; the transmission links generate intermediate transmission loss, and the propulsion efficiency of the system is reduced; the transmission gear is meshed to generate vibration and cause noise, then, water flow generates turbulent flow after flowing through the shafting and the underwater appendage, the propeller rotates in the turbulent flow to generate excitation and cavitation, and the cavitation bursts to generate noise.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, provided an annular electric power propeller that compound suspension bearing of magnetism liquid supported, the adoption is arranged the permanent magnet brushless motor of aquatic and is directly driven no hub formula screw and rotate, has saved middle drive mechanism, and rotor and screw subassembly are supported by compound suspension bearing system of magnetism liquid and are transmitted motor and hull with thrust on, reduce the middle transmission loss between motor to the screw, raise the efficiency, simplify propulsion system structure, reduce noise and vibration etc..
For solving one of above-mentioned technical problem at least, the utility model discloses the technical scheme who takes is:
the utility model provides an annular electric power propeller that compound suspension bearing of magnetic-liquid supported which characterized in that includes: a shell, a rim type motor, a magnetic-liquid composite suspension bearing system and a propeller, wherein,
the rim type motor includes: the stator assembly and the rotor assembly are arranged in the shell, and the end face flanges are respectively arranged at two ends of the shell;
the compound suspension bearing system of magnetism liquid is located on the end flange, compound suspension bearing system of magnetism liquid includes: the thrust disc is fixed at the end part of the rotor end plate, a second clearance channel communicated with the first clearance channel is arranged between the thrust disc and the end face flange, and a second water flow channel respectively communicated with the second clearance channel and the first water flow channel is arranged in the thrust disc and used for forming liquid suspension when water flows pass through the thrust disc; the dynamic thrust ring is arranged on the inner wall of the thrust disc, and the static thrust ring is arranged on the outer wall of the end face flange at the position corresponding to the dynamic thrust ring and used for generating magnetic repulsion force to form magnetic suspension;
the propeller is connected with the rotor assembly.
Further, the rotor end plate is also provided with a radial high-pressure water cavity, and the radial high-pressure water cavity is respectively communicated with the first clearance channel and the first water flow channel and is used for generating radial high-pressure water flow.
Further, the thrust disc is further provided with an axial high-pressure water cavity and a water inlet, the axial high-pressure water cavity is respectively communicated with the second gap channel and the second water flow channel and is used for generating axial high-pressure water flow, and the water inlet is communicated with the second water flow channel.
Furthermore, the water inlet is connected with a high-pressure water pump.
Further, the magnetic-hydraulic compound suspension bearing system further comprises: and the friction reducing block is arranged on the outer wall of the end face flange.
Further, the stator assembly is fixed above the inner side steps of the end face flanges at two ends, and the rotor assembly is located on the inner side of the stator assembly.
Further, the propeller is an integral propeller or a split propeller.
Furthermore, the dynamic thrust ring and the static thrust ring are both permanent magnets or electromagnetic coils wrapped with corrosion-resistant and corrosion-resistant coatings, and the like poles of the permanent magnets or the electromagnetic coils are opposite to each other to generate magnetic repulsion.
Further, the rim type motor is a rim type permanent magnet brushless motor.
The beneficial effects of the utility model include at least:
1) the propulsion efficiency is improved: firstly, a permanent magnet brushless motor is adopted, and a permanent magnet replaces a coil, so that compared with a traditional separately excited motor, the current loss is reduced, and the motor efficiency and the power factor are improved; secondly, the propeller is directly fixed by the inner circle of the rotor of the motor, and the rotor directly drives the propeller to rotate, so that any intermediate transmission link is not needed, and the loss caused by the intermediate transmission link is eliminated; thirdly, the magnetic-liquid composite suspension bearing system supports the rotor assembly and the propeller, bears the weight and the thrust of the rotor assembly and the propeller, and enables the rotor assembly and the propeller to be in a suspension state in the rotating process, so that the friction force is reduced, the friction power consumption is reduced, and the propulsion efficiency is improved by the measures;
2) noise vibration reduction: because the rotor directly drives the propeller, the vibration and noise caused by the meshing of gears of a gear box in the traditional propulsion mode are eliminated; secondly, when the propeller runs, the bearing pair is a magnetic liquid suspension bearing system in a non-contact mode, so that friction noise and vibration are greatly reduced, and in conclusion, noise vibration is reduced;
3) the structure is simplified, the weight is lightened, the reliability is improved, and the occupied space in the cabin is less: the middle transmission components such as a coupler, a gear box, a shafting, a sliding bearing, a bearing seat, a stern tube sealing system and the like which are inherent in the traditional electric propulsion type are eliminated, the structure is simpler, the reliability is higher, and the weight is greatly reduced; in addition, the motor is arranged under water, so that the space in the cabin is saved.
Drawings
FIG. 1 is a schematic diagram of a prior art electric propulsion system.
Fig. 2 is the structural schematic diagram of the annular electric thruster of the present invention.
Fig. 3 is a cross-sectional view taken along line C-C of fig. 2.
Fig. 4 is a schematic structural view of an integral propeller according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a split propeller according to an embodiment of the present invention.
Fig. 6 is a partially enlarged view of a portion a of fig. 3, illustrating a structure of the magnetic-hydraulic compound suspension bearing system.
The rotor comprises a motor 1, a gear box 2, a shafting 3, a propeller 4, a blade tip 401, a blade tip flange 402, a blade 403, a rotor assembly 5, a left end face flange 6, a shell 7, a stator assembly 8, a right end face flange 9, a magnetic-liquid composite suspension bearing system 10, a rotor end plate 11, a first clearance channel 111, a first water flow channel 112, a radial high-pressure water cavity 113, a thrust disc 12, a second clearance channel 121, a second water flow channel 122, an axial high-pressure water cavity 123, a water inlet 124, a dynamic thrust ring 13, a static thrust ring 14, a radial friction reducing block 15 and an axial friction reducing block 16.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following specific embodiments. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
Fig. 2 is the utility model discloses annular electric power propeller structure schematic diagram, fig. 3 is the C-C of fig. 2 to the cross-sectional view, combines fig. 2 and 3 to show, the utility model relates to an annular electric power propeller that compound suspension bearing of magnetism liquid supported mainly includes: the device comprises a shell, a rim type motor, a propeller and a magnetic-liquid composite suspension bearing system.
The utility model discloses a rim formula permanent magnet brushless motor has replaced traditional separately excited formula three-phase asynchronous motor. The rim type motor mainly comprises a stator assembly, a rotor assembly, a machine shell and an end face flange. Motor stator module constitutes for iron core and coil, and whole embedment seals the insulating cement, and isolated and play insulating effect with water, and the rotor contains the permanent magnet and embedment seals the insulating cement, prevents that water from getting into the inside permanent magnet that corrodes of rotor, and two ends are the rotor end plate about the rotor, form the rotor subassembly with the rotor together. Stator core pressure equipment is in motor housing, and the casing is the casing of propeller promptly, and the terminal surface flange of two end connection motors about the casing is: the stator assembly is fixed above the steps at the inner sides of the end face flanges at the two ends, and the rotor assembly is located on the inner side of the stator assembly.
Circle diameter is big in the rotor, can hold the screw, and the screw passes through the leaf tip to be fixed on the rotor subassembly inner circle, directly drives the screw by the rotor and rotates, and motor speed is screw rotational speed promptly, does not need intermediate transmission links such as gears. The motor stator generates a rotating magnetic field after a three-phase power supply is connected, the permanent magnet in the motor rotor generates electromagnetic force under the action of the rotating magnetic field, and the rotor rotates and outputs torque to drive the propeller to rotate in water to generate thrust for pushing a ship.
The screw is a metallic screw and also can be a composite material screw. The number of propeller blades is determined by calculation of hydrodynamic performance, and the number of blades can be 2, 3, 4, 5, 6 and the like, and the specific number is not particularly limited.
Fig. 4 is a schematic view of an integral propeller structure according to an embodiment of the present invention, and as shown in fig. 4, the propeller of this embodiment is integral, and each blade is connected to a whole through a common blade tip flange and then connected to the rotor assembly through the blade tip flange.
Fig. 5 is the split type propeller structure of an embodiment of the present invention, referring to fig. 5, the propeller blades of this embodiment are split type, each blade is fixed on the inner circle of the rotor assembly through the blade tip flange, and is supported and directly driven by the rotor assembly, and meanwhile, the screw is made into split type, which also facilitates the disassembly and replacement.
It can be understood that both the integral propeller and the split propeller are hub-free propellers without hubs, each blade is fixed on the rotor assembly through a blade tip flange and is directly driven by the rotor assembly, and the rotating speed of the motor, namely the rotating speed of the propeller, does not need a shafting and a hub for supporting and driving, and does not need intermediate driving links such as a transmission gear and the like.
Fig. 6 is a partial enlarged view of a portion a in fig. 3, and referring to fig. 6, the magnetic-hydraulic composite suspension bearing system is located on the end face flange and is composed of a liquid suspension bearing system and a magnetic thrust bearing system.
Wherein, the weight of rotor subassembly and screw is born to the liquid suspension bearing system, and the liquid suspension bearing system comprises thrust dish, antifriction piece, rotor end plate and the inside water flow channel of opening at rotor end plate and thrust dish, more specifically: the rotor end plate is connected with the rotor assembly and provided with a first gap channel between the end face flanges, a first water flow channel communicated with the first gap channel is arranged inside the rotor end plate, the thrust disc is fixed at the end part of the rotor end plate and provided with a second gap channel communicated with the first gap channel between the end face flanges, and a second water flow channel communicated with the second gap channel and the first water flow channel is arranged inside the thrust disc.
The rotor end plate is further provided with a radial high-pressure water cavity, and the radial high-pressure water cavity is communicated with the first gap channel and the first water flow channel respectively and is used for generating radial high-pressure water flow.
The thrust disc is further provided with an axial high-pressure water cavity and a water inlet, the axial high-pressure water cavity is communicated with the second gap channel and the second water flow channel respectively and used for generating axial high-pressure water flow, and the water inlet is communicated with the second water flow channel.
The antifriction piece set up in on the outer wall of end face flange, include: the radial friction reducing block is positioned at the relative position of the radial high-pressure water cavity, and the axial friction reducing block is positioned at the relative position of the axial high-pressure water cavity.
The theory of operation of liquid suspension bearing system does: when the motor is started, the rotor assembly starts to rotate to drive the rotor end plate to rotate, the thrust disc connected with the rotor end plate further rotates together, water at a water inlet of a second water flow channel in the thrust disc is sucked into the second water flow channel in the thrust disc, along with the high-speed rotation of the thrust disc and the rotor assembly, high-pressure water flow is formed under the action of centrifugal force and is guided into a radial high-pressure water cavity in the thrust disc and the rotor end plate through a water channel (in the direction shown by an arrow), the flow rate of the water flow is reduced, the water pressure is increased, a local high-pressure water area is formed between the radial high-pressure water cavity and the inner circular surface of a matched motor end face flange, a water pressure thrust F1 acts on the inner circular surface of the end face flange to form a supporting force for supporting the rotor assembly, the gravity of the rotor assembly is overcome, the rotor assembly is supported, the noise is reduced.
When the motor is started to accelerate and stopped to decelerate, the centrifugal force is weakened, the supporting force generated by high-pressure water pressure is not enough to overcome the gravity of the rotor assembly and the propeller, the rotor end plate is in contact with the radial friction reducing block on the end face flange at the moment and is in a sliding friction state, and the direct friction pair is in a low-resistance friction state due to the low friction coefficient and the low wear rate of the friction reducing block, so that the reliable operation of the propeller in a low-speed state is ensured. The high-pressure water can be generated by the centrifugal force caused by the high-speed rotation of the rotor assembly, and can also be directly pumped in by a high-pressure water pump externally connected with a water inlet.
The magnetic thrust bearing system consists of a movable thrust ring arranged in a thrust disc and a static thrust ring arranged in an end face flange corresponding to the position of the movable thrust ring to form a movable and static thrust bearing pair, wherein the movable thrust ring and the static thrust ring are permanent magnets or electromagnetic coils wrapped with corrosion-resistant and corrosion-resistant coatings, and the same poles of the movable thrust ring and the static thrust ring are opposite to each other to generate magnetic repulsion force.
The working principle of the magnetic thrust bearing system is as follows: in the operation process of the motor, the propeller drives the rotor component and the thrust disc to rotate together, and the propeller pushes the rotor and the thrust disc to move forwards (leftwards in the figure), namely towards the end face flange, so that the gap between the thrust disc and the end face flange is reduced. With the smaller and smaller gap, the magnetic repulsion force F2 generated between the magnets or between the magnets and the coil is larger and larger, and finally reaches balance with the propeller thrust, the dynamic thrust ring and the static thrust ring keep a certain gap and are in a non-contact suspension state, so that direct sliding friction between the thrust disc and the end face flange of the motor is avoided, and heating and abrasion are greatly reduced.
As shown in fig. 6, the high-pressure water flow generated by the high-speed rotation may be introduced into the axial high-pressure water chamber of the thrust plate, the flow rate decreases, the water pressure increases, and the high-pressure water generates a hydraulic thrust F1 toward both sides in the gap between the axial high-pressure water chamber and the end face flange. When the propeller pushes the thrust disc to move towards the end face flange, the gap between the thrust disc and the end face flange axial high-pressure water cavity is reduced, the water flow rate is lower, the water pressure is higher, the thrust disc is prevented from continuing to approach the end face flange, finally, the sum of the water pressure thrust and the magnetic thrust (namely, the magnetic repulsion F2) is balanced with the propeller thrust, the thrust disc stops moving towards the end face flange, a certain gap is kept, and the thrust disc and the end face flange are in a non-contact suspension state. The hydraulic thrust generated by hydraulic power shares part of the axial load of the magnetic thrust bearing, and forms resultant force with the magnetic thrust to jointly offset the thrust of the propeller, so that the thrust bearing pair is in a suspension state, namely the principle of generating the liquid suspension thrust bearing pair by the hydraulic power. The utility model discloses use the compound suspension bearing system of magnetic fluid that is produced by centrifugal force and magnetic force, play thrust and journal bearing's effect simultaneously, eliminate the vice direct friction between journal bearing is vice and the journal bearing of thrust bearing, make the bearing no longer wear, prolonged the life-span and the reliability of bearing greatly, solved the bearing wear problem of rim formula motor in aqueous.
The liquid suspension bearing system and the magnetic thrust bearing system jointly form a magnetic-liquid composite suspension bearing pair, support the gravity of the rotor assembly and the propeller and bear the thrust of the propeller. The magnetic-liquid composite suspension bearing pair is usually positioned on one side of the rotor instead of two ends of the rotor, and the structure enables the bearing pair to be arranged on the same part, so that continuous processing is facilitated during processing, the coaxiality between the bearing pairs is ensured, the processing efficiency is improved, and the manufacturing cost is reduced. When the thrust of backing a car by the propeller needs to be borne, a magnetic-liquid composite suspension bearing system can be arranged at the other end of the rotor, namely, the two ends of the rotor are provided with the magnetic-liquid composite suspension bearing systems.
To sum up, the utility model provides high propulsion efficiency: firstly, a permanent magnet brushless motor is adopted, and a permanent magnet replaces a coil, so that compared with a traditional separately excited motor, the current loss is reduced, and the motor efficiency and the power factor are improved; secondly, the propeller is directly fixed by the inner circle of the rotor of the motor, and the rotor directly drives the propeller to rotate, so that any intermediate transmission link is not needed, and the loss caused by the intermediate transmission link is eliminated; thirdly, the magnetic-liquid composite suspension bearing system supports the rotor assembly and the propeller, bears the weight and the thrust of the rotor assembly and the propeller, and enables the rotor assembly and the propeller to be in a suspension state in the rotating process, so that the friction force is reduced, the friction power consumption is reduced, and the propulsion efficiency is improved by the measures; the utility model discloses noise vibration reduces: because the rotor directly drives the propeller, the vibration and noise caused by the meshing of gears of a gear box in the traditional propulsion mode are eliminated; secondly, when the propeller runs, the bearing pair is a magnetic liquid suspension bearing system in a non-contact mode, so that friction noise and vibration are greatly reduced, and in conclusion, noise vibration is reduced; the utility model discloses simple structure, weight become light, the reliability improves, it is few to occupy the under-deck space: the middle transmission components such as a coupler, a gear box, a shafting, a sliding bearing, a bearing seat, a stern tube sealing system and the like which are inherent in the traditional electric propulsion type are eliminated, the structure is simpler, the reliability is higher, and the weight is greatly reduced; in addition, the motor is arranged under water, so that the space in the cabin is saved.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that various changes, modifications, substitutions and alterations can be made in the above embodiments by those skilled in the art without departing from the scope of the present invention, and that various changes in the detailed description and applications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (9)
1. The utility model provides an annular electric power propeller that compound suspension bearing of magnetic-liquid supported which characterized in that includes: a shell, a rim type motor, a magnetic-liquid composite suspension bearing system and a propeller, wherein,
the rim type motor includes: the stator assembly and the rotor assembly are arranged in the shell, and the end face flanges are respectively arranged at two ends of the shell;
the compound suspension bearing system of magnetism liquid is located on the end flange, compound suspension bearing system of magnetism liquid includes: the thrust disc is fixed at the end part of the rotor end plate, a second clearance channel communicated with the first clearance channel is arranged between the thrust disc and the end face flange, and a second water flow channel respectively communicated with the second clearance channel and the first water flow channel is arranged in the thrust disc and used for forming liquid suspension when water flows pass through the thrust disc; the dynamic thrust ring is arranged on the inner wall of the thrust disc, and the static thrust ring is arranged on the outer wall of the end face flange at the position corresponding to the dynamic thrust ring and used for generating magnetic repulsion force to form magnetic suspension;
the propeller is connected with the rotor assembly.
2. The annular electric thruster of claim 1, wherein the rotor end plate is further provided with a radial high pressure water chamber, and the radial high pressure water chamber is respectively communicated with the first clearance passage and the first water flow passage for generating radial high pressure water flow.
3. The annular electric thruster of claim 1, wherein said thrust disc is further provided with an axial high-pressure water chamber communicating with said second clearance passage and with a second water flow passage, respectively, for generating an axial high-pressure water flow, and a water inlet communicating with said second water flow passage.
4. The annular electric thruster of claim 3, wherein the water inlet is connected with a high pressure water pump.
5. The toroidal electric thruster of claim 1, wherein said magnetic-hydraulic compound suspension bearing system further comprises: and the friction reducing block is arranged on the outer wall of the end face flange.
6. The annular electric thruster of claim 1, wherein the stator assembly is fixed above the inner steps of the end flanges at both ends, and the rotor assembly is positioned inside the stator assembly.
7. The annular electric thruster of claim 1, wherein the propeller is an integral propeller or a split propeller.
8. The annular electric thruster of claim 1, wherein the dynamic thrust ring and the static thrust ring are permanent magnets or electromagnetic coils wrapped with corrosion-resistant and corrosion-resistant coatings, and have opposite homopolarities to generate magnetic repulsion force.
9. An annular electric thruster according to claim 1, characterized in that the rim motor is a rim permanent magnet brushless motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020661395.0U CN212354371U (en) | 2020-04-27 | 2020-04-27 | Annular electric propeller supported by magnetic-liquid composite suspension bearing |
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| CN202020661395.0U CN212354371U (en) | 2020-04-27 | 2020-04-27 | Annular electric propeller supported by magnetic-liquid composite suspension bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111439362A (en) * | 2020-04-27 | 2020-07-24 | 广州海工船舶设备有限公司 | An annular electric thruster supported by a magnetic-hydraulic composite suspension bearing |
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- 2020-04-27 CN CN202020661395.0U patent/CN212354371U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111439362A (en) * | 2020-04-27 | 2020-07-24 | 广州海工船舶设备有限公司 | An annular electric thruster supported by a magnetic-hydraulic composite suspension bearing |
| CN111439362B (en) * | 2020-04-27 | 2025-01-07 | 广州海工船舶设备有限公司 | A ring-shaped electric propeller supported by a magnetic fluid composite suspension bearing |
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