CN212172505U - Contrarotating electric propeller supported by gas resistance reduction - Google Patents
Contrarotating electric propeller supported by gas resistance reduction Download PDFInfo
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- CN212172505U CN212172505U CN202020662139.3U CN202020662139U CN212172505U CN 212172505 U CN212172505 U CN 212172505U CN 202020662139 U CN202020662139 U CN 202020662139U CN 212172505 U CN212172505 U CN 212172505U
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Abstract
The utility model relates to a gaseous drag reduction supports counter-rotating electric power propeller, include: an annular housing and a propulsion unit, the propulsion unit comprising: rim type motor, gas drag reduction system, screw and shafting subassembly. Two rim type permanent magnet brushless motors which are coaxially arranged in tandem are adopted, each of the two rim type permanent magnet brushless motors drives a propeller to form an electric drive combined type contra-rotating propeller, the rotating directions are opposite, but the thrust directions are consistent, and the combined type contra-rotating propeller pushes a ship to advance together. The propeller arranged at the rear absorbs the energy of the wake vortex of the propeller in front, the overall propulsion efficiency is improved, and the effect of rotating the propeller is achieved. The motor is arranged in water and directly drives the propeller to rotate, so that a transmission link from the motor to the propeller is omitted, the rotor and the propeller are supported by a shafting, and thrust is transmitted to the motor and the ship body.
Description
Technical Field
The utility model belongs to the technical field of marine propeller among the boats and ships turbine, concretely relates to contrarotating electric power propeller that gaseous drag reduction 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 electric propulsion system adopts a propulsion mode that after a speed change gear box is driven by a motor to decelerate, a shaft system and a propeller are driven to rotate to generate the forward or backward thrust of the ship. 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 a gaseous drag reduction support contrarotating electric power propeller, adopt two rim formula permanent magnet brushless motor of tandem coaxial arrangement, screw of each drive forms electric drive's combination formula contrarotating screw, revolves to opposite, but thrust direction is unanimous, promotes boats and ships jointly and gos forward. The propeller arranged at the rear absorbs the energy of the wake vortex of the propeller in front, the overall propulsion efficiency is improved, and the effect of rotating the propeller is achieved. The motor is arranged in water and directly drives the propeller to rotate, so that a transmission link from the motor to the propeller is omitted, the rotor and the propeller are supported by a shafting, and thrust is transmitted to the motor and the ship body.
For solving one of above-mentioned technical problem at least, the utility model discloses the technical scheme who takes is:
a gas drag reduction supported counter-rotating electric thruster, comprising: an annular housing and a propulsion unit, the propulsion unit comprising: the gas drag reduction system is used for guiding gas into an air gap between a stator assembly and a rotor assembly of the rim motor, one end of the propeller is connected with the rotor assembly, the other end of the propeller is connected with the shafting assembly, and the shafting assembly is connected with the annular shell;
the forward rotation propulsion unit and the reverse rotation propulsion unit are coaxially arranged in the annular shell in parallel from front to back;
the propellers of the forward rotation propulsion unit and the reverse rotation propulsion unit are opposite in rotation direction and used for generating thrust in the same direction.
Further, the rim type motor includes: stator module, rotor subassembly and end flange, stator module's both ends are equipped with respectively end flange, end flange is fixed in on the annular housing, just stator module is fixed in both ends the top of end flange's inboard step, the rotor subassembly is located stator module's inboard just is located both ends between the end flange.
Further, the gas drag reduction system comprises: the air channel is arranged inside the end face flange, an air inlet of the air channel is communicated with the air valve on the annular shell, and an air outlet of the air channel is respectively communicated with the air gap and a gap between the rotor assembly and the end face flange.
Furthermore, the air valve is connected with an air supply device.
Further, the shafting subassembly includes: the propeller shaft is connected with the propeller, the other end of the propeller shaft is arranged on the bearing block through the bearing group, and the bearing block is connected with the end face flange through the supporting spokes.
Further, the bearing group is assembled in the bearing seat, and one or more of water lubrication and oil lubrication modes are adopted between the propeller shaft and the bearing seat.
Further, when an oil lubrication mode is adopted, a sealing element is arranged between the propeller shaft and the bearing seat.
Further, the counter-rotating electric thruster further comprises an energy-saving accessory body, which comprises: the protective cover is arranged at each of two ends of the annular shell, and the flow stabilizing plates are arranged on the annular shell and are parallel to the advancing direction or are arranged at a certain angle.
Further, the forward rotation propulsion unit and the reverse rotation propulsion unit respectively include: a plurality of stages of the propulsion unit.
Further, the rim type motor is a rim type permanent magnet brushless motor.
The beneficial effects of the utility model include at least:
1) firstly, the utility model adopts the permanent magnet brushless motor, and the motor efficiency is high; secondly, the motor rotor directly drives the propeller to rotate, any intermediate transmission link is not needed, and transmission loss is reduced; thirdly, a counter-rotating paddle type is adopted, the rear paddle absorbs circumferential energy of the front paddle, and the efficiency is further improved; fourthly, a gas resistance reducing system is adopted, so that the friction power consumption of the propeller and water is reduced, and the propulsion efficiency is improved by the measures;
2) 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;
3) the motor directly drives the propeller, an intermediate transmission link is omitted, the structure is simpler, the reliability is higher, and in addition, the space in the cabin is saved because the motor is arranged under water;
4) the utility model adopts two motors and two sets of propellers, namely a two-stage propulsion unit, and has higher power density; in addition, higher power density and greater thrust can also be achieved through the combination of more stages of propulsion units.
Drawings
Fig. 1 is a perspective view of the counter-rotating electric thruster of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is a schematic structural diagram of the gas drag reduction system of the present invention.
Fig. 5 is a schematic view of an integrated structure of the hub and the propeller shaft according to the present invention.
Fig. 6 is a schematic view of an integrated structure of the hub and the propeller shaft according to the present invention.
Fig. 7 is a first schematic view of a split structure of the hub and the propeller shaft according to the present invention.
Fig. 8 is a schematic view of a split structure of the hub and the propeller shaft according to the present invention.
Fig. 9 is a schematic view of the energy-saving accessory structure of the present invention.
Fig. 10 is a schematic view a-f of the structure of the stabilizer with various cross-sectional shapes according to the present invention.
Fig. 11 is a schematic structural view of an electric thruster of a multistage propulsion unit according to the present invention.
The device comprises an annular shell 1, a propulsion unit 2, a stator assembly and rotor assembly 301, an end face flange 302, a gas resistance reduction system 4, a gas circuit 401, a gas valve 402, a gas circuit element 403, a propeller 5, a propeller hub 501, blades 502, a blade tip flange 503, a propeller shaft 6, a bearing set 7, a bearing seat 8, a support spoke 9, a sealing element 10, a protective cover 11 and a flow stabilizing plate 12.
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. 1 is the perspective view of the counter-rotating electric thruster of the present invention, fig. 2 is the front view of fig. 1, fig. 3 is the a-a of fig. 2 to the cross-sectional view, refer to fig. 1-3, the present invention relates to a counter-rotating electric thruster supported by gas drag reduction, which mainly comprises: an annular housing and a propulsion unit, the propulsion unit comprising: the gas drag reduction system is used for guiding gas into an air gap between a stator assembly and a rotor assembly of the rim motor, one end of the propeller is connected with the rotor assembly, the other end of the propeller is connected with the shafting assembly, and the shafting assembly is connected with the annular shell; the forward rotation propulsion unit and the reverse rotation propulsion unit are coaxially arranged in the annular shell in parallel from front to back; the propellers of the forward rotation propulsion unit and the reverse rotation propulsion unit are opposite in rotation direction and used for generating thrust in the same direction.
In the embodiment of the present invention, two motors are connected in series and coaxially arranged, and each drives one propeller. The front propeller rotates forwards and the rear propeller rotates backwards, the rotating directions of the front propeller and the rear propeller are opposite, so that the thrust directions are consistent, the rear propeller absorbs the circumferential vortex energy of the front propeller to form a pair of rotating propellers, the propulsion efficiency is improved, and the blade parameters such as the blade number and the pitch distribution of the front propeller and the rear propeller need to be determined by hydrodynamic optimization design.
As shown in fig. 3, the present invention adopts a rim type permanent magnet brushless motor to replace the traditional separately excited three-phase asynchronous motor. The rim type motor is composed of a stator assembly, a rotor assembly, a machine shell and an end face flange. Motor stator module constitutes for iron core and coil, whole embedment sealing insulating cement, with water isolated and play insulating effect, the rotor includes the permanent magnet and the embedment is sealed, prevents that water from getting into the inside corruption permanent magnet of rotor, and two ends are the rotor end links about the rotor, form the rotor subassembly with the rotor together, stator core pressure equipment is in motor housing, the casing is the annular shell of propeller promptly, two end flange of connecting the motor about the casing, more specifically: the two ends of the stator assembly are respectively provided with the end face flanges, the end face flanges are fixed on the annular shell, the stator assembly is fixed at the two ends and above the inner side steps of the end face flanges, and the rotor assembly is located on the inner side of the stator assembly and located at the two ends and between the end face flanges.
The utility model discloses 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 subassembly and rotates, and motor speed is screw rotational speed promptly, does not need middle transmission links such as gear. 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 utility model discloses the screw is the metallics screw, also can be the combined material screw, and the screw is integral, and the leaf number is decided according to the hydrodynamic force performance, can be 2 leaves, perhaps 3 leaves, 4 leaves, 5 leaves etc.. Each blade is connected with the rotor assembly through a blade tip or a blade tip flange, the rotor assembly directly drives the propeller to rotate through the blade tip flange, the rotating speed of the motor is the rotating speed of the propeller, and transmission links such as gears are not needed.
Fig. 4 is the utility model discloses gas drag reduction system structure schematic diagram, as shown in fig. 4, gas drag reduction system plays the effect of the frictional resistance that reduces rotor subassembly and water production when aquatic is rotatory, gas drag reduction system includes: the air channel is arranged inside the end face flange, the air inlet of the air channel is communicated with the air valve on the annular shell, the air outlet of the air channel is communicated with the air gap and the gap between the rotor assembly and the end face flange respectively, and the air valve is connected with an air supply device.
The working principle of the gas drag reduction system is as follows: the gas is introduced into the air gaps of the stator and the rotor assembly and the gaps between the rotor assembly and the end face flange through the external gas compressor, the gas cylinder or other gas supply devices, the gas valve, the gas circuit and the gas circuit element, so that the air gap of the motor is full or partially full of the gas, the outer surface of the rotor assembly is more rubbed with the gas when rotating, the friction with water is reduced, and the friction resistance of the rotor assembly in the gas during rotation is greatly lower than that generated by rotation in the water, so that the friction power consumption of the rotor assembly during rotation is greatly reduced, and the efficiency of the propeller is improved.
According to the embodiment of the present invention, the gas may be gas or other special gas such as diesel exhaust gas through cooling, or mixed gas of gas and other gases.
Gaseous drag reduction system is comparatively showing to the drag reduction effect of high rotational speed annular propeller, is not showing to the annular propeller drag reduction effect of low rotational speed, to low rotational speed annular propeller, can cancel or close this function.
Referring to fig. 5 and 6, a hub of the propeller and a propeller shaft are integrated, fig. 5 shows that a water lubrication mode is adopted between the bearing seat and the propeller shaft, that is, a gap is arranged between the bearing seat and the propeller shaft, so that water can flow in conveniently, fig. 6 shows that an oil lubrication mode is adopted between the bearing seat and the propeller shaft, and a sealing element is arranged between the bearing seat and the propeller shaft, so that grease can be prevented from leaking and water can be prevented from entering.
Referring to fig. 7 and 8, a hub and a propeller shaft of the propeller are of a split structure, blade root parts of blades of the propeller are connected with the hub, the hub is assembled on the propeller shaft, the propeller shaft is assembled on a bearing group, the bearing group is assembled in a bearing seat, and the bearing seat is fixed on a flange on the end face of the motor through a supporting spoke; the propeller shaft, the bearing group, the bearing seat, the supporting spokes and the like form a shafting assembly. The bearing group comprises a radial bearing and a thrust bearing, the radial bearing supports the weight of the rotor assembly and the propeller, and the thrust bearing bears the forward and reverse thrust of the propeller and the electromagnetic force of the motor and transmits the forward and reverse thrust to the end face flange of the motor and the annular shell through the bearing seat and the support spokes so as to transmit the forward and reverse thrust to the ship body; fig. 7 shows that the bearing seat and the propeller shaft are in a water lubrication mode, namely, a gap is arranged between the bearing seat and the propeller shaft, so that water can flow in conveniently; fig. 8 shows that the bearing block is oil lubricated with the propeller shaft, and a seal is provided between the bearing block and the propeller shaft to prevent leakage of grease and ingress of water.
Referring to fig. 9, the counter-rotating electric propeller further includes an energy-saving accessory, which mainly includes a protective cover, a flow guide plate, a flow stabilizing plate, and the like.
The front protective cover is arranged at the front end of the annular shell, the rear protective cover is arranged at the rear end of the annular shell, the motor is protected, the front protective cover and the rear protective cover can be arc-shaped or streamline, water resistance can be reduced, and hydrodynamic performance is improved.
A guide plate (not shown in the figure) is arranged between the front propeller and the rear propeller, and is respectively connected with the bearing seat and the annular shell to play a role of supporting the bearing seat; and determining parameters such as the section of the guide plate, the number of the guide plates, the angle between the guide plate and water flow and the like according to hydrodynamic performance calculation. Parameters such as the quantity, the section and the angle of the guide plates are optimized, the inflow flow field of the rear propeller can be improved, and the hydrodynamic efficiency is improved.
Referring to fig. 2, the flow stabilizer of the present invention is fixed on the casing of the propeller, parallel to the advancing direction or at a certain angle, and rectifies the turbulence from the stern, so that the flow direction of the water flow is more concentrated and consistent, and the flow with the inner diameter of the propeller forms a pressure difference similar to that flowing through the wing, wherein the forward pressure component becomes an extra thrust, which plays a role in improving the efficiency of the propeller, and when the ship sails at a lower sailing speed, the synergistic effect of the flow stabilizer is not significant, and under this condition, the flow stabilizer can be cancelled; the shape of the flow stabilizer of the present invention can be various, specifically as shown in a-f in fig. 10.
Referring to fig. 11, according to another embodiment of the present invention, the present invention can perform tandem of multiple propeller units to form a multi-stage linkage propeller combination. When a set of propeller unit is added, the front end face flange of the propeller unit is fastened on the rear end face flange of the front propeller unit, and then the rear protective cover and the rear cover are assembled on the last propeller unit. That is, not only can the propellers be formed by the pairs of two sets of propeller unit units, but also the propellers of 3-level propellers can be formed by 3 sets of propeller units, the propellers of 4-level propellers can be formed by 4 sets of propeller units, 5-level, 6-level, 7-level. By the combination of the multistage thruster, higher power and thrust can be achieved.
In summary, the utility model adopts the permanent magnet brushless motor, the motor efficiency is high; secondly, the motor rotor directly drives the propeller to rotate, any intermediate transmission link is not needed, and transmission loss is reduced; thirdly, a counter-rotating paddle type is adopted, the rear paddle absorbs circumferential energy of the front paddle, and the efficiency is further improved; fourthly, a gas resistance reducing system is adopted, so that the friction power consumption of the propeller and water is reduced, and the propulsion efficiency is improved by the measures; 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; the motor directly drives the propeller, an intermediate transmission link is omitted, the structure is simpler, the reliability is higher, and in addition, the space in the cabin is saved because the motor is arranged under water; the utility model adopts two motors and two sets of propellers, namely a two-stage propulsion unit, and has higher power density; in addition, higher power density and greater thrust can also be achieved through the combination of more stages of propulsion units.
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 (10)
1. A gas drag reduction supported counter-rotating electric thruster, comprising: an annular housing and a propulsion unit, the propulsion unit comprising: the gas drag reduction system is used for guiding gas into an air gap between a stator assembly and a rotor assembly of the rim motor, one end of the propeller is connected with the rotor assembly, the other end of the propeller is connected with the shafting assembly, and the shafting assembly is connected with the annular shell;
the forward rotation propulsion unit and the reverse rotation propulsion unit are coaxially arranged in the annular shell in parallel from front to back;
the propellers of the forward rotation propulsion unit and the reverse rotation propulsion unit are opposite in rotation direction and used for generating thrust in the same direction.
2. Counter-rotating electric thruster according to claim 1, characterized in that said rim motor comprises: stator module, rotor subassembly and end flange, stator module's both ends are equipped with respectively end flange, end flange is fixed in on the annular housing, just stator module is fixed in both ends the top of end flange's inboard step, the rotor subassembly is located stator module's inboard just is located both ends between the end flange.
3. Counter-rotating electric thruster according to claim 2, characterized in that said gas drag reduction system comprises: the air channel is arranged inside the end face flange, an air inlet of the air channel is communicated with the air valve on the annular shell, and an air outlet of the air channel is respectively communicated with the air gap and a gap between the rotor assembly and the end face flange.
4. Counter-rotating electric thruster according to claim 3, characterized in that said gas valve is connected with a gas supply.
5. Counter-rotating electric thruster according to claim 2, characterized in that said shafting assembly comprises: the propeller shaft is connected with the propeller, the other end of the propeller shaft is arranged on the bearing block through the bearing group, and the bearing block is connected with the end face flange through the supporting spokes.
6. The counter-rotating electric propeller according to claim 5, wherein the bearing set is assembled in the bearing seat, and one or more of water lubrication and oil lubrication are adopted between the propeller shaft and the bearing seat.
7. Counter-rotating electric thruster according to claim 6, characterized in that there is a seal between the propeller shaft and the bearing housing when oil-lubricated.
8. The counter-rotating electric thruster of claim 1, further comprising an energy saving appendage comprising: the protective cover is arranged at each of two ends of the annular shell, and the flow stabilizing plates are arranged on the annular shell and are parallel to the advancing direction or are arranged at a certain angle.
9. Counter-rotating electric thruster according to claim 1, characterized in that said forward and reverse propulsion units respectively comprise: a plurality of stages of the propulsion unit.
10. Counter-rotating electric thruster according to claim 1, characterized in that said rim motor is a rim permanent magnet brushless motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020662139.3U CN212172505U (en) | 2020-04-27 | 2020-04-27 | Contrarotating electric propeller supported by gas resistance reduction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020662139.3U CN212172505U (en) | 2020-04-27 | 2020-04-27 | Contrarotating electric propeller supported by gas resistance reduction |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112874744A (en) * | 2021-01-19 | 2021-06-01 | 武汉波依迈科技有限公司 | Rotating shaft structure and wheel rim propeller adopting same |
| CN115071936A (en) * | 2021-03-15 | 2022-09-20 | 中国科学院沈阳自动化研究所 | Independently driven three-stage underwater propeller |
| CN115092373A (en) * | 2022-05-27 | 2022-09-23 | 广东逸动科技有限公司 | Power device, control method thereof, marine propeller and ship |
| CN115395690A (en) * | 2022-08-10 | 2022-11-25 | 中国航发贵阳发动机设计研究所 | Annular permanent magnet motor for directly driving aircraft engine fan with medium-to-large bypass ratio |
| CN115743485A (en) * | 2022-11-24 | 2023-03-07 | 深海技术科学太湖实验室 | Integrated drag-reduction vibration-reduction deep-sea rim propeller |
| TWI862942B (en) * | 2022-06-24 | 2024-11-21 | 梅正新 | Vortex dynamic propulsion structure |
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2020
- 2020-04-27 CN CN202020662139.3U patent/CN212172505U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112874744A (en) * | 2021-01-19 | 2021-06-01 | 武汉波依迈科技有限公司 | Rotating shaft structure and wheel rim propeller adopting same |
| CN115071936A (en) * | 2021-03-15 | 2022-09-20 | 中国科学院沈阳自动化研究所 | Independently driven three-stage underwater propeller |
| CN115071936B (en) * | 2021-03-15 | 2024-02-06 | 中国科学院沈阳自动化研究所 | Independently-driven three-stage underwater propeller |
| CN115092373A (en) * | 2022-05-27 | 2022-09-23 | 广东逸动科技有限公司 | Power device, control method thereof, marine propeller and ship |
| TWI862942B (en) * | 2022-06-24 | 2024-11-21 | 梅正新 | Vortex dynamic propulsion structure |
| CN115395690A (en) * | 2022-08-10 | 2022-11-25 | 中国航发贵阳发动机设计研究所 | Annular permanent magnet motor for directly driving aircraft engine fan with medium-to-large bypass ratio |
| CN115743485A (en) * | 2022-11-24 | 2023-03-07 | 深海技术科学太湖实验室 | Integrated drag-reduction vibration-reduction deep-sea rim propeller |
| CN115743485B (en) * | 2022-11-24 | 2023-10-31 | 深海技术科学太湖实验室 | Deep sea rim propeller with integrated resistance and vibration reduction |
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