Deep sea propulsion motor rotor cooling hollow shaft structure
By combining a hollow shaft, an oil slinger, and an axial drainer, effective cooling of the deep-sea propulsion motor rotor is achieved, solving the problem of uneven temperature, improving heat dissipation efficiency, and ensuring the reliability of the motor in the deep-sea environment.
Patent Information
- Application Number
- CN202520327628.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-27
AI Technical Summary
The rotor cooling of deep-sea propulsion motors relies entirely on heat transfer through contact between the rotor surface and the oil, resulting in uneven temperature distribution. The oil temperature is high near the rotor and low near the casing, leading to low heat dissipation efficiency.
It adopts a combination structure of hollow shaft, oil slinger and axial drainer, and achieves rotor cooling through oil circulation. Combined with mechanical seal and O-ring, it ensures sealing performance and avoids oil leakage.
It improves rotor heat dissipation efficiency, avoids local overheating, and ensures stable operation of the motor in the high-pressure environment of deep sea. The structure is simple and the cost is low.
Smart Images
Figure CN223858956U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to deep sea propulsion motor technical field, especially relates to a deep sea propulsion motor rotor cooling hollow shaft structure. BACKGROUND
[0002] Deep sea propulsion motor is the important power component part of deep sea mobile platform, and the propulsion motor is installed outside the hull and directly contacts with seawater, and there is a large pressure difference between the motor interior and seawater, and the method of filling oil in the motor interior is usually used to compensate the pressure difference.
[0003] During the operation of the motor, the heat generated by the stator can be well taken away by the flowing seawater through the shell, thereby achieving good stator cooling effect. However, the motor interior is a closed structure and is located in the deep sea, and the heat dissipation of the motor rotor completely relies on the heat transfer between the rotor surface and the oil, and when the motor is operated for a long time, the temperature is not uniform, that is, the oil temperature near the motor rotor is high, and the oil temperature near the motor shell is low, and the heat dissipation efficiency of the motor rotor is low. UTILITY MODEL CONTENTS
[0004] Therefore, the utility model aims at providing a deep sea propulsion motor rotor cooling hollow shaft structure to solve the problem that the heat dissipation of the motor rotor completely relies on the heat transfer between the rotor surface and the oil, and when the motor is operated for a long time, the temperature is not uniform, that is, the oil temperature near the motor rotor is high, and the oil temperature near the motor shell is low, and the heat dissipation efficiency of the motor rotor is low.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A deep sea propulsion motor rotor cooling hollow shaft structure, comprising a stator, a rotor, a driving end cover, a non-driving end cover and a machine shell, the two ends of the machine shell are respectively provided with the driving end cover and the non-driving end cover, the stator is installed on the inner side of the machine shell, the rotor comprises a hollow shaft, a rotor core and a permanent magnet, the permanent magnet is installed in the rotor core, the rotor core is installed on the inner side of the stator, the rotor core is sleeved on the outer side of the hollow shaft, the one end of the hollow shaft is provided with an oil throwing disc, and the other end is provided with an axial flow inducer.
[0007] Furthermore, a mechanical seal is installed between the hollow shaft and the driving end cover.
[0008] Furthermore, an angular contact ball bearing and a second cylindrical roller bearing are installed on the outer side of the connection between the hollow shaft and the driving end cover.
[0009] Furthermore, a second cylindrical roller bearing is installed on the outer side of the connection between the hollow shaft and the non-driving end cover.
[0010] Further, the angular contact ball bearing and the first cylindrical roller bearing are fixed by the locking nut.
[0011] Further, the rotary transformer is installed at the end of the hollow shaft.
[0012] Further, O-rings are arranged at the connection between the drive end cover and the non-drive end cover and the shell.
[0013] Further, a plurality of oil outlet holes corresponding to the oil outlet holes on the hollow shaft are arranged on the oil throwing disc.
[0014] Further, a plurality of blades are arranged on the inner circumference of the axial flow guide, and the inclination angle of the blades ranges from 15 to 20 degrees.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] 1. The utility model effectively improves the heat dissipation efficiency of the rotor through the circulation of the oil, and avoids local overheating of the rotor.
[0017] 2. The utility model does not need an external oil circuit, and can realize the cooling function through the cooperation of the hollow shaft, the oil throwing disc and the axial flow guide, so that the structure is simple and the cost is low.
[0018] 3. The utility model adopts mechanical sealing and O-ring sealing in the motor, so that the sealing performance in the deep-sea high-pressure environment is ensured, and oil leakage is prevented.
[0019] 4. The utility model is suitable for high-power deep-sea motors and can stably operate in the deep-sea high-pressure environment. DRAWINGS
[0020] The drawings that form a part of the present utility model are used to provide a further understanding of the present utility model, and the illustrative embodiments of the present utility model and the description thereof are used to explain the present utility model, and do not constitute an improper limitation on the present utility model. In the drawings:
[0021] Figure 1 It is a schematic view of the deep-sea propelling motor rotor cooling hollow shaft structure according to the present utility model;
[0022] Figure 2 It is a structural schematic view of the hollow shaft;
[0023] Figure 3 It is a structural schematic view of the oil throwing disc according to the present utility model;
[0024] Figure 4 It is a structural schematic view of the axial flow guide according to the present utility model.
[0025] In the drawings:
[0026] 1-hollow shaft, 2-mechanical seal, 3-lock nut, 4-driving end cover, 5-angular contact ball bearing, 6-second cylindrical roller bearing, 7-oil throwing disc, 8-stator, 9-rotor core, 10-casing, 11-O-ring, 12-non-driving end cover, 13-cylindrical roller bearing, 14-rotary transformer, 15-axial flow inducer, 16-oil. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all the embodiments.
[0028] DETAILED DESCRIPTION 1: see Figures 1-4 The embodiment is described, a kind of deep-sea propulsion motor rotor cooling hollow shaft structure, it is characterized in that: including stator 8, rotor, driving end cover 4, non-driving end cover 12 and casing 10, the both ends of the casing 10 are respectively equipped with driving end cover 4 and non-driving end cover 12, the stator 8 is installed in the inside of casing 10, the rotor includes hollow shaft 1, rotor core 9 and permanent magnet, the rotor core 9 is equipped with permanent magnet, the rotor core 9 is installed in the inside of stator 8, the rotor core 9 is sleeved in the outside of hollow shaft 1, one end of the hollow shaft 1 is equipped with oil throwing disc 7, the other end is equipped with axial flow inducer 15, the outside of the connection of the hollow shaft 1 and driving end cover 4 is equipped with angular contact ball bearing 5 and second cylindrical roller bearing 6, the outside of the connection of the hollow shaft 1 and non-driving end cover 12 is equipped with second cylindrical roller bearing 13, angular contact ball bearing 5 and first cylindrical roller bearing 6 are fixed by lock nut 3.
[0029] After motor starts, hollow shaft 1 starts to rotate, oil 16 is inhaled into the central hole of hollow shaft 1 by axial flow inducer 15, after oil 16 enters the central hole, forms rotor axial cooling oil circuit, oil 16 moves to the direction of oil throwing disc 7 along the inner wall of hollow shaft 1 under the action of centrifugal force, when oil 16 flows to the position of oil throwing disc 7, is subjected to the action of centrifugal force, oil 16 is thrown from the oil outlet hole of oil throwing disc 7, enters the air gap between stator 8 and rotor, oil 16 takes away the heat on the surface of rotor in step 3, oil 16 flows back to axial flow inducer 15 through the oil guide hole on non-driving end cover 12, forms circulating cooling oil circuit, with the continuous operation of motor, oil 16 is constantly circulated and flows between axial flow inducer 15, hollow shaft 1, oil throwing disc 7, stator 8 and rotor air gap, realizes the cooling of rotor.
[0030] The oil 16 absorbs the heat generated by the rotor during the circulation process, and transmits the heat to the external seawater through the contact with the casing 10, so as to realize the effective cooling of the rotor. With the continuous operation of the motor, the oil 16 is circulated and flows between the axial flow guide 15, the hollow rotating shaft 1, the oil throwing disc 7, the stator 8 and the rotor air gap, so as to ensure the uniform distribution of the rotor temperature and avoid the local overheating phenomenon, thereby improving the heat dissipation efficiency of the motor.
[0031] Specific implementation method 2: refer to Figures 1-4 It is illustrated that the mechanical seal 2 is installed between the hollow rotating shaft 1 and the driving end cover 4, the O-ring 11 is arranged at the connection between the driving end cover 4, the non-driving end cover 12 and the casing 10, the elastic material of the O-ring 11 can tightly adhere to the contact surface between the end cover and the casing 10, so as to form a reliable seal, the end cover and the casing 10 are sealed through the O-ring 11, so as to ensure that the oil 16 in the motor will not leak from the connection between the end cover and the casing, and seawater can also be prevented from invading, the mechanical seal 2 is responsible for dynamic sealing, the high-speed rotation of the hollow rotating shaft 1 is used to prevent the oil 16 from leaking and seawater from invading, the mechanical seal 2 and the O-ring 11 are used in cooperation, so as to form the multiple sealing protection of the motor, and the reliable operation of the motor in the deep-sea high-pressure environment is ensured.
[0032] Specific implementation method 3: refer to Figures 1-4 It is illustrated that the rotary transformer 14 is installed at the end of the hollow rotating shaft 1.
[0033] The above disclosed specific implementation methods of the utility model are only used for helping to explain the utility model. The specific implementation methods do not describe all the details, and the utility model is not limited to the specific implementation methods. According to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, so as to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.
Claims
1. A deep sea propulsion motor rotor cooling hollow shaft structure, characterized by: The motor comprises a stator (8), a rotor, a driving end cover (4), a non-driving end cover (12) and a casing (10), the driving end cover (4) and the non-driving end cover (12) are respectively arranged at two ends of the casing (10), the stator (8) is arranged inside the casing (10), the rotor comprises a hollow rotating shaft (1), a rotor core (9) and permanent magnets, the permanent magnets are arranged in the rotor core (9), the rotor core (9) is arranged inside the stator (8), the rotor core (9) is sleeved outside the hollow rotating shaft (1), one end of the hollow rotating shaft (1) is provided with an oil throwing disc (7), and the other end of the hollow rotating shaft (1) is provided with an axial flow guide (15).
2. A deep sea propulsion motor rotor cooled hollow shaft structure according to claim 1, characterized in that: Mechanical seals (2) are arranged between the hollow rotating shaft (1) and the driving end cover (4).
3. A deep sea propulsion motor rotor cooled hollow shaft structure according to claim 2, characterized in that: Angular contact ball bearings (5) and first cylindrical roller bearings (6) are arranged outside the connection between the hollow rotating shaft (1) and the driving end cover (4).
4. A deep sea propulsion motor rotor cooled hollow shaft structure according to claim 3, characterized in that: Second cylindrical roller bearings (13) are arranged outside the connection between the hollow rotating shaft (1) and the non-driving end cover (12).
5. A deep sea propulsion motor rotor cooled hollow shaft structure according to claim 4, characterized in that: The angular contact ball bearings (5), the first cylindrical roller bearings (6) and the locking nuts (3) are fixed.
6. A deep sea propulsion motor rotor cooled hollow shaft structure according to claim 1, characterized in that: Rotary transformers (14) are arranged at the ends of the hollow rotating shaft (1).
7. A deep sea propulsion motor rotor cooled hollow shaft structure as claimed in claim 1, wherein: O-rings (11) are arranged at the connections between the driving end cover (4), the non-driving end cover (12) and the casing (10).
8. A deep sea propulsion motor rotor cooled hollow shaft structure according to claim 1, characterized in that: A plurality of oil outlet holes are uniformly distributed on the oil throwing disc (7) and correspond to the positions of the oil outlet holes of the hollow rotating shaft (1).
9. A deep sea propulsion motor rotor cooled hollow shaft structure as claimed in claim 1, wherein: A plurality of blades are uniformly distributed on the inner periphery of the axial flow guide (15), and the inclination angle of the blades ranges from 15 to 20 degrees.