CN212172503U - Circumferential multi-motor driven annular electric propeller supported by water lubricating bearing - Google Patents
Circumferential multi-motor driven annular electric propeller supported by water lubricating bearing Download PDFInfo
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- CN212172503U CN212172503U CN202020661394.6U CN202020661394U CN212172503U CN 212172503 U CN212172503 U CN 212172503U CN 202020661394 U CN202020661394 U CN 202020661394U CN 212172503 U CN212172503 U CN 212172503U
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Abstract
The utility model relates to a many motor drive's of circumference annular electric power propeller that lubricated bearing supported of water, include: the motor comprises a shell, a motor driving unit, a water lubrication bearing system and a propeller. The utility model discloses a water lubricated bearing system support, by a plurality of linear electric motor jointly driven annular electric power propeller, can eliminate the adverse effect that the magnetic bearing brought, this propeller principle and simple structure, propulsion efficiency height, vibration noise are low, security and redundancy are high, starting current is low, are particularly suitable for the boats and ships of inland river and the shallow draft environmental restriction in lake.
Description
Technical Field
The utility model discloses boats and ships turbine propeller technical field, concretely relates to many motor drive's of circumference annular electric power propeller that lubricated bearing supported of water.
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 many motor drive's of circumference annular electric power propeller that lubricated bearing supported, it is supported for lubricated bearing system of water, by a plurality of linear electric motor jointly driven annular electric power propeller, can eliminate the adverse effect that the magnetic bearing brought, this propeller principle and simple structure, propulsion efficiency height, vibration noise are low, security and redundancy are high, starting current is low, especially be suitable for the boats and ships of interior river and the shallow draft environmental restriction in lake.
For solving one of above-mentioned technical problem at least, the utility model discloses the technical scheme who takes is:
a water lubricated bearing supported circumferential multi-motor driven annular electric thruster comprising: a housing, a motor drive unit, a water lubricated bearing system and a propeller, wherein,
the motor driving unit includes: the public rotor assembly is arranged on the inner side of the shell, the stator assemblies are annularly distributed in the shell along the circumferential direction of the shell and form a multi-stator-single-rotor pair with the public rotor assembly, and the end face flanges are respectively arranged at two ends of the shell;
the water lubricated bearing system is located on the end face flange, the water lubricated bearing system includes: the rotor end ring and the wear-resistant sleeve are fixedly connected to two ends of the public rotor assembly respectively, an axial gap flow channel and a radial gap flow channel which are communicated with each other are formed between the rotor end ring and the end face flange, the wear-resistant sleeve is arranged on the outer wall of the end face flange at the two ends, and the wear-resistant sleeve is located in the axial gap flow channel and the radial gap flow channel respectively;
the propellers are connected with the common rotor assembly.
Furthermore, the stator assembly is fixed above the inner side steps of the end face flanges at the two ends, and the public rotor assembly is located on the inner side of the stator assembly and between the end face flanges at the two ends.
Further, the rotor end ring is made of wear-resistant metal or hard wear-resistant coating.
Furthermore, the wear-resistant sleeve is made of a corrosion-resistant and wear-resistant metal or nonmetal material, or a high polymer material, or a hard wear-resistant coating.
Further, the vertical height of the shell in the up-down direction is smaller than the outer diameter of the shell at other angles.
Further, the propeller is an integral propeller or a split propeller.
The beneficial effects of the utility model include at least:
1) the water-lubricated bearing is adopted, so that the cost is reduced, a complex control system is not required, the cost is further reduced, in addition, the structure is simpler, the reliability is also improved, and finally, the defect of efficiency reduction caused by eddy current loss of the magnetic bearing is eliminated;
2) the characteristics of high propelling efficiency are maintained: the permanent magnet linear motor rotor adopts the permanent magnet to replace a coil, and compared with the traditional separately excited motor, the current loss is reduced, and the motor efficiency and the power factor are improved; secondly, the motor directly drives the propeller, so that a gear transmission link is eliminated, and the mechanical efficiency loss is reduced, and the propulsion efficiency is improved due to the factors;
3) the noise vibration is low: the noise and vibration caused by the gear transmission adopted by the traditional propeller are eliminated; the propeller has uniform incoming flow and small blade vibration; the tip vortex cavitation bubble of the traditional propeller and the noise caused by the tip vortex cavitation bubble are eliminated, and in conclusion, the noise vibration is greatly reduced;
4) the safety and the redundancy of the propeller are improved: a plurality of groups of independent linear motors are arranged in the propeller along the circumferential direction, each motor can be independently controlled, and when the motor is damaged, the other motors still run and drive the rotor and the propeller, so that the propeller can continue to run, and potential safety hazards on water caused by the fact that the propeller stops due to damage of the motor and cannot continue to drive the ship to propel are avoided;
5) the starting current is reduced, and the specification requirements on the electrical elements are reduced: each linear motor is driven and controlled by an independent controller, when the propeller is started, only one 1-2 linear motors need to be driven, and all the motors do not need to be started simultaneously, so that the starting current of the motors is reduced, the overcurrent pressure of a motor control circuit element is reduced, the specification and the cost of the circuit element are reduced, and the load and the impact on a marine power grid in the starting process are also reduced;
6) the height of the propeller in the vertical direction is reduced, and the propeller is particularly suitable for the draft limitation of shallow water environments in inland lakes: because a plurality of linear motors of the structural formula of the propeller are independently and separately arranged along the circumferential direction, under the condition that the lake draught in the river is limited, in order to reduce the height limit of the propeller in the vertical direction, the motor stators can not be arranged above and below the circumferential direction of the propeller, so that the vertical height of the propeller is reduced, and the structure avoids the condition that the wheel ring type propeller is lower than the ship bottom due to overlarge outer diameter and damages the wheel ring type propeller when touching hard objects.
Drawings
Fig. 1 is a schematic structural diagram of the propeller of the present invention.
FIG. 2 is a sectional view taken along line C-C of FIG. 1.
Fig. 3 is a schematic view of the integral propeller structure of the present invention.
Fig. 4 is the structural schematic diagram of the split type propeller of the present invention.
Fig. 5 is a schematic structural diagram of the water lubricated bearing system of the present invention.
The structure comprises a shell 1, a propeller 2, blades 201, a blade tip flange 202, a public rotor assembly 3, a stator assembly 4, an end face flange 5, a water lubrication bearing system 6, a rotor end ring 7, an axial clearance channel 701, a warp clearance channel 702 and a wear-resistant sleeve 8.
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 a schematic structural diagram of the propeller of the present invention, and fig. 2 is a cross-sectional view along the direction C-C of fig. 1. Referring to fig. 1 and 2, the utility model relates to a many motor drive's of circumference annular electric power propeller that water lubricated bearing supported mainly includes: the motor comprises a shell, a motor driving unit, a water lubrication bearing system and a propeller.
Wherein, what is different with traditional motor, the utility model discloses the stator module of well motor is not continuous in circumference, in the top of vertical direction and below department, respectively has one section radian, does not arrange stator module. Because the stator assembly is not arranged, the shell is arranged outside the public rotor assembly, so that the vertical height H of the outer surface of the shell of the motor in the vertical direction is smaller than the outer diameter D of the motor at other angles, the height of the propeller in the vertical direction is reduced, and the propeller is particularly suitable for the draft limitation of shallow water environments in inland lakes.
The utility model discloses a plurality of permanent magnetism brushless linear electric motor that circumference was arranged, the motor comprises stator module, rotor subassembly, casing, end face flange etc. and the aquatic is arranged in completely to motor rotor subassembly and stator module, and coil and iron core, permanent magnet etc. wrap up through multilayer insulation and anticorrosive material, and isolated with water, insulating nature is good, and is corrosion-resistant. The left end and the right end of the rotor are rotor end rings which form a rotor assembly together with the rotor. The stator core is pressed in a motor shell, the motor shell is a propeller shell, the motor shell is connected with an end face flange, and a water lubricating bearing system is arranged on the end face flange.
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 shell, the stator assembly is fixed at the two ends and above the inner side steps of the end face flanges, and the public rotor assembly is located on the inner side of the stator assembly and between the end face flanges.
The utility model discloses each motor stator module is independent mutually, arranges in the casing, every along the circumference interval stator module's radian is calculated according to optimizing and is confirmed. The rotor assembly is a public rotor and is annular, and the permanent magnet is surface-mounted and embedded in the rotor iron core. Stator-rotor pairs of each motor are formed between the stator assembly coils which are distributed in the circumferential direction and the permanent magnets of the public rotor assembly, each motor is controlled and regulated by an independent controller, each controller controls a three-phase power supply to be connected into the corresponding stator body to generate a rotating magnetic field, and one section of the rotor body corresponding to the length of each stator generates rotation and outputs torque under the action of the rotating magnetic field. The number of the motors is 2 to a plurality, and the number is 2, 3, 4, 5, 6 or more; according to the requirement, 1 of the starting devices can be started, and 2 or more of the starting devices can be started simultaneously, such as 3, 4, 5 and the like.
Of course, it is also possible to combine multiple motors into a single motor by changing the circuit or coil connection manner, i.e. the total number of motors becomes 1.
The diameter of the inner circle of the public rotor assembly is large, the propeller can be accommodated, the propeller is fixed on the inner circle of the public rotor assembly through the blade tip, the propeller is directly driven by the public rotor assembly to rotate, the rotating speed of the motor is the rotating speed of the propeller, intermediate transmission links such as gears are not needed, and thrust is generated after the propeller rotates at a high speed.
The propeller is a metal propeller or a composite propeller. The number of propeller blades is determined according to hydrodynamic performance calculation, and the number of blades can be 2, 3, 4, 5, 6 and the like.
Fig. 3 is the utility model discloses integral screw structure schematic diagram, as shown in fig. 3, the screw can be integral, and each blade is a whole through the blade tip flange joint that shares, and rethread blade tip flange and public rotor subassembly are connected.
Fig. 4 is the utility model discloses split type screw structure sketch map, as shown in fig. 4, the screw blade also can be split type, and every paddle passes through the blade tip flange to be fixed on public rotor subassembly endotheca, is supported and direct drive by public rotor subassembly, simultaneously because the screw is made split type, has also made things convenient for dismantlement and change.
No matter integral screw propeller or split type screw propeller is no propeller hub type screw propeller, each blade is fixed on a public rotor assembly through a blade tip flange and is directly driven by the public rotor assembly, the rotating speed of a motor is the rotating speed of the screw propeller, and shafting and a propeller hub for supporting and driving are not needed, and intermediate transmission links such as a transmission gear are not needed.
Fig. 5 is the utility model discloses water lubricated bearing system structure schematic diagram, it is shown with reference to fig. 5, water lubricated bearing system bears the weight of rotor subassembly and screw, bears the screw simultaneously and is reversing thrust to transmit thrust to the casing, pass to the hull on again.
The water lubrication bearing system consists of a left rotor end ring, a right rotor end ring, a left wear-resistant sleeve and a right wear-resistant sleeve, wherein the left rotor end ring and the right rotor end ring are fastened together with a rotor and are positioned at the left side and the right side of the rotor; the wear-resistant sleeve is made of corrosion-resistant and wear-resistant metal or nonmetal materials, or polymer materials, or hard wear-resistant coatings and the like.
The working principle of the water lubrication bearing system is as follows: the outer circular surface of the left rotor end ring and the inner circular surface of the left wear-resistant sleeve form a left radial bearing pair, the outer circular surface of the right rotor end ring and the inner circular surface of the right wear-resistant sleeve form a right radial bearing pair, the left radial bearing pair and the right radial bearing pair which are positioned in the radial gap flow channel are concentric, the weights of the public rotor assembly and the propeller are supported together, and the centrifugal force formed by eccentricity in the rotating process of the public rotor assembly and the propeller is borne. The end face of the left rotor end ring and the end face of the wear-resistant sleeve form a left thrust bearing pair, the end face of the right rotor end ring and the end face of the wear-resistant sleeve form a right thrust bearing pair, and the left thrust bearing pair and the right thrust bearing pair which are positioned in the axial clearance flow channel respectively bear forward and reverse thrust formed by forward and reverse rotation of the propeller.
It can be understood that radial gap runner and axial gap runner also can be used for holding aquatic silt to through rivers, it is vice with thrust bearing to cool off radial bearing.
To sum up, the utility model discloses annular electric power propeller for water lubricated bearing system support, by a plurality of linear electric motor combined drive's annular electric power propeller, can eliminate the adverse effect that the magnetic bearing brought, this propeller principle and simple structure, propulsion efficiency height, vibration noise are low, security and redundancy are high, starting current is low, are particularly suitable for the boats and ships of inland river and the shallow draft environmental restriction of lake.
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 (6)
1. A water lubricated bearing supported circumferential multi-motor driven annular electric thruster, comprising: a housing, a motor drive unit, a water lubricated bearing system and a propeller, wherein,
the motor driving unit includes: the public rotor assembly is arranged on the inner side of the shell, the stator assemblies are annularly distributed in the shell along the circumferential direction of the shell and form a multi-stator-single-rotor pair with the public rotor assembly, and the end face flanges are respectively arranged at two ends of the shell;
the water lubricated bearing system is located on the end face flange, the water lubricated bearing system includes: the rotor end ring and the wear-resistant sleeve are fixedly connected to two ends of the public rotor assembly respectively, an axial gap flow channel and a radial gap flow channel which are communicated with each other are formed between the rotor end ring and the end face flange, the wear-resistant sleeve is arranged on the outer wall of the end face flange at the two ends, and the wear-resistant sleeve is located in the axial gap flow channel and the radial gap flow channel respectively;
the propellers are connected with the common rotor assembly.
2. 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 common rotor assembly is located inside the stator assembly and between the end flanges at both ends.
3. The annular electric thruster of claim 1, wherein the rotor end ring is a wear resistant metal or a hard wear resistant coating.
4. The annular electric thruster of claim 1, wherein the wear-resistant sleeve is a metal or non-metal material, or a polymer material, or a hard wear-resistant coating, which is corrosion-resistant and wear-resistant.
5. Annular electric thruster according to claim 1, characterized in that the vertical height of the housing in the up-down direction is smaller than the outer diameter of the housing at other angles.
6. The annular electric thruster of claim 1, wherein the propeller is an integral propeller or a split propeller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020661394.6U CN212172503U (en) | 2020-04-27 | 2020-04-27 | Circumferential multi-motor driven annular electric propeller supported by water lubricating bearing |
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| CN202020661394.6U CN212172503U (en) | 2020-04-27 | 2020-04-27 | Circumferential multi-motor driven annular electric propeller supported by water lubricating bearing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114455050A (en) * | 2022-01-25 | 2022-05-10 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rim propeller |
| CN114455049A (en) * | 2022-01-25 | 2022-05-10 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Wheel rim propeller |
| CN114476006A (en) * | 2022-01-25 | 2022-05-13 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rim propeller structure |
| CN114906308A (en) * | 2022-06-23 | 2022-08-16 | 宁波海伯集团有限公司 | Electric propeller for ship |
| CN115027654A (en) * | 2022-07-15 | 2022-09-09 | 宁波海伯集团有限公司 | Marine propeller |
| CN114476006B (en) * | 2022-01-25 | 2024-10-22 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rim propeller structure |
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2020
- 2020-04-27 CN CN202020661394.6U patent/CN212172503U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114455050A (en) * | 2022-01-25 | 2022-05-10 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rim propeller |
| CN114455049A (en) * | 2022-01-25 | 2022-05-10 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Wheel rim propeller |
| CN114476006A (en) * | 2022-01-25 | 2022-05-13 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rim propeller structure |
| CN114455049B (en) * | 2022-01-25 | 2024-10-08 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rim propeller |
| CN114455050B (en) * | 2022-01-25 | 2024-10-11 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rim propeller |
| CN114476006B (en) * | 2022-01-25 | 2024-10-22 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rim propeller structure |
| CN114906308A (en) * | 2022-06-23 | 2022-08-16 | 宁波海伯集团有限公司 | Electric propeller for ship |
| CN114906308B (en) * | 2022-06-23 | 2024-03-01 | 宁波海伯集团有限公司 | Electric propeller for ship |
| CN115027654A (en) * | 2022-07-15 | 2022-09-09 | 宁波海伯集团有限公司 | Marine propeller |
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