CN117013752A - Large-power span combined variable-speed underwater propulsion motor - Google Patents
Large-power span combined variable-speed underwater propulsion motor Download PDFInfo
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- CN117013752A CN117013752A CN202311009973.7A CN202311009973A CN117013752A CN 117013752 A CN117013752 A CN 117013752A CN 202311009973 A CN202311009973 A CN 202311009973A CN 117013752 A CN117013752 A CN 117013752A
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- 230000009471 action Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 241000251729 Elasmobranchii Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
Abstract
The invention provides a high-power span combined variable-speed underwater propulsion motor, wherein one end of a motor output shaft is mounted on a bearing bracket through a third bearing, the other end of the motor output shaft is mounted on a driving end cover through a fourth bearing, one end of a high-power motor rotating shaft, which is connected with a second bearing, is coaxially mounted through a flat key and an overrunning clutch I, the overrunning clutch I and a coupling are coaxially mounted through screws, and the other end of the coupling is connected with the motor output shaft through a spline; the high-power motor and the low-power motor are connected in series, so that the high-power motor and the low-power motor share an output shaft, and the high-power motor and the low-power motor are coaxially connected. The high-power motor can independently drive the underwater vehicle to navigate at a high speed, and the low-power motor can independently drive the underwater vehicle to cruise at a low speed, so that the mechanical isolation of the high-power rotor and the low-power rotor is realized, and the possibility that the high counter electromotive force generated by the rotation of the low-power rotor exceeding the rated rotation speed breaks down the insulation of the low-power motor is avoided.
Description
Technical Field
The invention relates to the field of underwater propulsion motors, in particular to a high-efficiency combined variable-speed underwater propulsion motor.
Background
With the continuous development of navigation technology, underwater vehicles have been rapidly developed. And the high efficiency is one of the important development directions of the underwater vehicle in the future. Because an underwater vehicle usually utilizes energy carried by the underwater vehicle to navigate and carry out underwater operations, improving efficiency is an important means for improving the cruising ability of the underwater vehicle. Generally, as the speed of the underwater vehicle increases, the required propulsion power increases in a cubic relationship, for example, the speed of the vehicle becomes twice as high as the original propulsion power is eight times as high as the original propulsion power. Therefore, for underwater vehicles such as torpedoes, which have a high-speed navigation requirement, the required power span is very large, and the high-efficiency design of the underwater vehicles is difficult.
The propulsion motor is one of the power propulsion core components of the electric underwater vehicle, and the improvement of the efficiency of the propulsion motor has very important significance for the high efficiency of the underwater vehicle. It is well known that propulsion motors generally have high efficiency only near the design nominal point, while operating points farther from the nominal point are less efficient. In order to improve the efficiency of the underwater propulsion motor, the existing underwater propulsion motor mainly improves the efficiency of the high-power and low-power states by reasonably adjusting the position of a designed rated point or optimizing the motor design, so that the high-efficiency range of the motor is enlarged. The defects are that: when the power difference between the high-speed state and the low-speed state is in order of magnitude, particularly when a motor with the power higher than hundred kilowatts operates below one kilowatt, the existing underwater propulsion motor can only ensure high efficiency higher than 90% in a high-power output state, and the efficiency in a low-power output state can be reduced to below 70%. For underwater vehicles that operate in a low power state most of the time and have high power output requirements, the efficiency of existing propulsion motors is difficult to meet engineering requirements.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a combined variable speed underwater propulsion motor with a large power span, and the combined variable speed underwater propulsion motor with the large power span can ensure that the combined variable speed underwater propulsion motor has high efficiency in both high and low power states so as to solve the problem that the efficiency of the existing underwater propulsion motor is difficult to improve in the low power state.
The technical scheme adopted for solving the technical problems is as follows:
the combined variable-speed underwater propulsion motor with the high power span comprises a high-power motor consisting of a high-power stator (5) and a high-power rotor (4), a low-power motor consisting of a low-power stator (17) and a low-power rotor (16), a high-power motor rotating shaft (3), a motor output shaft (14), an overrunning clutch I (10), an overrunning clutch II (15) and a coupler (11); the high-power rotor (4) and the high-power motor rotating shaft (3) are coaxially arranged through flat key connection to form a rotating assembly; one end of the high-power motor rotating shaft (3) is mounted on the non-driving end cover (1) through a first bearing (2), and the other end of the high-power motor rotating shaft (3) is mounted on the bearing end cover (8) through a second bearing (7); the low-power rotor (16) is coaxially arranged on the overrunning clutch II (15), and the overrunning clutch II (15) is coaxially arranged on the motor output shaft (14) through flat key connection; one end of the motor output shaft (14) is mounted on the bearing bracket (9) through a third bearing (12), and the other end of the motor output shaft (14) is mounted on the driving end cover (19) through a fourth bearing (18); one end of the high-power motor rotating shaft (3) connected with the second bearing (7) is coaxially arranged through a flat key and an overrunning clutch I (10), the overrunning clutch I (10) and a coupler (11) are coaxially arranged through screws, and the other end of the coupler (11) is connected with a motor output shaft (14) through a spline; the high-power motor and the low-power motor are connected in series to realize that the high-power motor and the low-power motor share an output shaft and realize power switching of the high-power motor and the low-power motor, so that the high-power motor and the low-power motor are coaxially connected; under the action of the overrunning clutch I (10), when the high-power motor rotating shaft (3) can only rotate in the forward omega direction, the overrunning clutch I (10) is combined and transmits power to the motor output shaft (14) through the coupler (11), and when the overrunning clutch I (10) rotates in the reverse direction, the power of the high-power motor rotating shaft (3) cannot be transmitted to the motor output shaft (14) through the coupler (11); on the other hand, under the action of the overrunning clutch II (15), the low-power rotor (16) can only transmit power to the motor output shaft (14) when rotating in the forward direction, and when rotating in the reverse direction, the overrunning clutch II (15) is disengaged, and the power of the low-power rotor (16) cannot be transmitted to the motor output shaft (14) through the overrunning clutch II (15).
The high-power motor and the low-power motor are both obtained through a motor optimization design method, so that the highest efficiency is achieved when the high-power motor independently operates, and the highest efficiency is achieved when the low-power motor independently operates, and the overall efficiency of the propulsion motor is improved.
The overrun clutch I (10) and the overrun clutch II (15) are overrun clutches with torque and rotating speed being transmitted according to the requirements.
The first bearing (2), the second bearing (7), the third bearing (12) and the fourth bearing (18) are all rolling bearings.
The high-power stator (5) and the low-power stator (17) can be firstly respectively installed on the motor shell (6) and the small motor shell (13) in a hot-charging mode.
The high-power rotor (4) adopts a built-in rotor structure, and the low-power rotor (16) adopts a surface-mounted rotor structure.
The invention has the beneficial effects that:
(1) The high-power motor can independently drive the underwater vehicle to navigate at a high speed, and the low-power motor can independently drive the underwater vehicle to navigate at a low speed. The power source of the high-speed navigation and the low-speed cruising of the underwater vehicle are separated, and the high-power motor and the low-power motor are designed in an optimized mode, so that the high-speed navigation and the low-speed navigation of the underwater vehicle are high in efficiency, energy is saved, and the range of the underwater vehicle is improved.
(2) Through the use of overrunning clutch I (10) and overrunning clutch II (15), overrunning clutch has two coaxial-mounted subassemblies of inner circle and outer lane, and it has two kinds of running state: the switching between the combined state (the inner ring and the outer ring rotate together) and the separated state (the inner ring and the outer ring only rotate, and the rotating speed of the inner ring and the outer ring is dependent on the rotating speed of the inner ring and the outer ring), the switching between the two states is not required to be controlled, the switching can be automatically realized mechanically according to the rotating states of the inner ring and the outer ring, and the mechanical isolation of the high-power rotor (4) and the low-power rotor (16) is realized. Namely:
first, when the high-power rotor (4) rotates, the overrunning clutch I (10) is in a combined state, so that power is transmitted to the motor output shaft (14). The overrunning clutch II (15) is in a disengaged state, and the motor output shaft (14) can not drive the low-power rotor (16), so that the possibility that the low-power rotor (16) rotates beyond the rated rotation speed to generate ultrahigh back electromotive force to break through the insulation of the low-power motor is avoided;
secondly, when the low-power rotor (16) rotates, the overrunning clutch II (15) is in a combined state, so that power is transmitted to the motor output shaft (14), the overrunning clutch I (10) is in a separated state, the motor output shaft (14) cannot drive the high-power rotor (4), and the problem that the efficiency of the low-power motor is greatly reduced due to factors such as high mechanical loss and large rotational inertia of the high-power rotor (4) is avoided.
Drawings
FIG. 1 is an axial cross-sectional view of a high power span combined variable speed underwater propulsion motor configuration of the present invention.
Fig. 2 is a radial cross-sectional view of the high power span combined variable speed underwater propulsion motor structure of the present invention at the high power motor.
Fig. 3 is a radial cross-sectional view of the high power span combined variable speed underwater propulsion motor configuration of the present invention at a low power motor.
FIG. 4 is an axial half cross-sectional view of an alternative overrunning clutch according to an embodiment of the present invention.
Wherein: the non-drive end cover is 1, the first bearing is 2, the high-power motor rotating shaft is 3, the high-power rotor is 4, the high-power stator is 5, the motor housing is 6, the second bearing is 7, the bearing end cover is 8, the bearing support is 9, the overrunning clutch I is 10, the coupler is 11, the third bearing is 12, the small motor housing is 13, the motor output shaft is 14, the overrunning clutch II is 15, the low-power rotor is 16, the low-power stator is 17, the fourth bearing is 18, and the drive end cover is 19.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1, the invention provides an underwater propulsion motor with high-power span and high-efficiency combined and shared output shaft, which is characterized by comprising a high-power motor composed of a high-power stator (5) and a high-power rotor (4), a low-power motor composed of a low-power stator (17) and a low-power rotor (16), a high-power motor rotating shaft (3), a motor output shaft (14), an overrunning clutch I (10), an overrunning clutch II (15) and a coupler (11). The high-power rotor (4) and the high-power motor rotating shaft (3) are coaxially arranged through flat key connection to form a rotating assembly. The left end of the high-power motor rotating shaft (3) is mounted on the non-driving end cover (1) through a first bearing (2), and the right end of the high-power motor rotating shaft is mounted on the non-driving end cover (8) through a second bearing (7). The low-power rotor (16) is coaxially arranged on the overrunning clutch II (15), and the overrunning clutch II (15) is coaxially arranged on the motor output shaft (14) through flat key connection. The left end of the motor output shaft (14) is mounted on the bearing bracket (9) through a third bearing (12), and the right end of the motor output shaft is mounted on the driving end cover (19) through a fourth bearing (18). The right end of the high-power motor rotating shaft (3) is coaxially arranged through a flat key and an overrunning clutch I (10), the overrunning clutch I (10) and a coupler (11) are coaxially arranged through screws, and the right end of the coupler (11) is connected with the left end of a motor output shaft (14) through a spline. Thereby realizing that the high-power motor and the low-power motor share the output shaft.
Under the action of the overrunning clutch I (10), the high-power motor rotating shaft (3) can only transmit power to the motor output shaft (14) through the coupler (11) when rotating in the omega direction, and when rotating in the opposite direction of omega, the overrunning clutch I (10) is disengaged, and the power of the high-power motor rotating shaft (3) cannot be transmitted to the motor output shaft (14) through the coupler (11). On the other hand, under the action of the overrunning clutch II (15), the low-power rotor (16) can only transmit power to the motor output shaft (14) when rotating in the omega direction, and when rotating in the opposite direction of omega, the overrunning clutch II (15) is disengaged, and the power of the low-power rotor (16) cannot be transmitted to the motor output shaft (14) through the overrunning clutch II (15).
In a specific embodiment, the rated power of the high-power motor is about 200kW, the rated power of the low-power motor is about 0.8kW, and the rated efficiency of the high-power motor and the rated efficiency of the low-power motor are respectively greater than 95% and 85% through simulation calculation.
In the specific embodiment, the high-power rotor (4) adopts a built-in rotor structure, and the low-power rotor (16) adopts a surface-mounted rotor structure, as can be seen in fig. 2 and 3.
In the specific embodiment, the high-power rotor (4) is axially segmented for 5 sections to optimize the air gap flux density waveform and reduce the cogging torque and torque pulsation of the high-power motor.
The specific assembly process is as follows: the high-power stator (5) and the low-power stator (17) are firstly respectively installed on the motor shell (6) and the small motor shell (13) in a hot-charging mode, and respectively form a high-power stator assembly and a low-power stator assembly. The high-power rotor (4) and the high-power motor rotating shaft (3) are coaxially arranged through interference fit to form a high-power rotor assembly, and the low-power rotor (16), the overrunning clutch II (15) and the motor output shaft (14) are coaxially arranged to form a low-power rotor assembly. Furthermore, the overrunning clutch I (10) and the coupling (11) are mounted as an overrunning clutch I assembly by screws. During assembly, the low-power stator assembly, the output end cover (19) and the bearing bracket (9) are firstly installed into a low-power motor whole through the third bearing (12) and the fourth bearing (18) at two ends. And then the whole low-power motor is installed on the high-power stator assembly through screws, and then the overrunning clutch I assembly, the bearing end cover (8), the second bearing (7), the high-power rotor assembly, the first bearing (2) and the non-driving end cover (1) are sequentially installed.
The working principle is as follows: when the underwater vehicle needs high-speed high-power mechanical power, the high-power motor operates, and under the action of the overrunning clutch I (10), the mechanical power is sequentially transmitted from the high-power rotor (4) to the motor output shaft (14) through the high-power motor rotating shaft (3), the overrunning clutch I (10) and the coupling (11); when the underwater vehicle needs low-speed low-power mechanical power, the low-power motor operates, and under the action of the overrunning clutch II (15), the mechanical power is sequentially transmitted to the motor output shaft (14) by the overrunning clutch II (15) through the low-power rotor (16).
Claims (6)
1. A high-power span combined variable-speed underwater propulsion motor is characterized in that:
the high-power span combined variable-speed underwater propulsion motor comprises a high-power motor consisting of a high-power stator (5) and a high-power rotor (4), a low-power motor consisting of a low-power stator (17) and a low-power rotor (16), a high-power motor rotating shaft (3), a motor output shaft (14), an overrunning clutch I (10), an overrunning clutch II (15) and a coupler (11); the high-power rotor (4) and the high-power motor rotating shaft (3) are coaxially arranged through flat key connection to form a rotating assembly; one end of the high-power motor rotating shaft (3) is mounted on the non-driving end cover (1) through a first bearing (2), and the other end of the high-power motor rotating shaft (3) is mounted on the bearing end cover (8) through a second bearing (7); the low-power rotor (16) is coaxially arranged on the overrunning clutch II (15), and the overrunning clutch II (15) is coaxially arranged on the motor output shaft (14) through flat key connection; one end of the motor output shaft (14) is mounted on the bearing bracket (9) through a third bearing (12), and the other end of the motor output shaft (14) is mounted on the driving end cover (19) through a fourth bearing (18); one end of the high-power motor rotating shaft (3) connected with the second bearing (7) is coaxially arranged through a flat key and an overrunning clutch I (10), the overrunning clutch I (10) and a coupler (11) are coaxially arranged through screws, and the other end of the coupler (11) is connected with a motor output shaft (14) through a spline; the high-power motor and the low-power motor are connected in series to realize that the high-power motor and the low-power motor share an output shaft and realize power switching of the high-power motor and the low-power motor, so that the high-power motor and the low-power motor are coaxially connected; under the action of the overrunning clutch I (10), when the high-power motor rotating shaft (3) can only rotate in the forward omega direction, the overrunning clutch I (10) is combined and transmits power to the motor output shaft (14) through the coupler (11), and when the overrunning clutch I (10) rotates in the reverse direction, the power of the high-power motor rotating shaft (3) cannot be transmitted to the motor output shaft (14) through the coupler (11); on the other hand, under the action of the overrunning clutch II (15), the low-power rotor (16) can only transmit power to the motor output shaft (14) when rotating in the forward direction, and when rotating in the reverse direction, the overrunning clutch II (15) is disengaged, and the power of the low-power rotor (16) cannot be transmitted to the motor output shaft (14) through the overrunning clutch II (15).
2. The high power span combined variable speed underwater propulsion motor of claim 1 wherein:
the high-power motor and the low-power motor are both obtained through a motor optimization design method, so that the highest efficiency is achieved when the high-power motor independently operates, and the highest efficiency is achieved when the low-power motor independently operates, and the overall efficiency of the propulsion motor is improved.
3. The high power span combined variable speed underwater propulsion motor of claim 1 wherein:
the overrun clutch I (10) and the overrun clutch II (15) are overrun clutches with torque and rotating speed being transmitted according to the requirements.
4. The high power span combined variable speed underwater propulsion motor of claim 1 wherein:
the first bearing (2), the second bearing (7), the third bearing (12) and the fourth bearing (18) are all rolling bearings.
5. The high power span combined variable speed underwater propulsion motor of claim 1 wherein:
the high-power stator (5) and the low-power stator (17) are firstly respectively arranged on the motor shell (6) and the small motor shell (13) in a hot-charging mode.
6. The high power span combined variable speed underwater propulsion motor of claim 1 wherein:
the high-power rotor (4) adopts a built-in rotor structure, and the low-power rotor (16) adopts a surface-mounted rotor structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311009973.7A CN117013752A (en) | 2023-08-11 | 2023-08-11 | Large-power span combined variable-speed underwater propulsion motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311009973.7A CN117013752A (en) | 2023-08-11 | 2023-08-11 | Large-power span combined variable-speed underwater propulsion motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117013752A true CN117013752A (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311009973.7A Pending CN117013752A (en) | 2023-08-11 | 2023-08-11 | Large-power span combined variable-speed underwater propulsion motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117013752A (en) |
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2023
- 2023-08-11 CN CN202311009973.7A patent/CN117013752A/en active Pending
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