CN112531956B - Outboard deep water pressure self-balancing propulsion motor - Google Patents
Outboard deep water pressure self-balancing propulsion motor Download PDFInfo
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- CN112531956B CN112531956B CN202011192108.7A CN202011192108A CN112531956B CN 112531956 B CN112531956 B CN 112531956B CN 202011192108 A CN202011192108 A CN 202011192108A CN 112531956 B CN112531956 B CN 112531956B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/124—Sealing of shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention provides an outboard deep water pressure self-balancing propulsion motor which comprises an output shaft, a rotary dynamic seal, a motor body, a pressure balancing mounting seat, a pressure regulating device and an oil charging and discharging component, wherein the pressure regulating device is fixed at the rear end of the pressure balancing mounting seat and comprises an oil bag, an oil bag seat, an oil bag protective cover and a connecting shaft, oil liquid is contained in the oil bag, the oil bag seat is positioned in a shell formed by the oil bag seat and the oil bag protective cover and is communicated with an oil cavity of the pressure balancing mounting seat, a water through hole is formed in the oil bag protective cover and used for introducing external water into the shell to extrude the oil bag, the volume of the oil liquid in the motor body is changed by bearing the pressure of external water environment, and the balance of internal and external pressure in the propulsion motor is achieved. The invention carries out innovative design on the pressure regulating device, can effectively monitor the running condition of the motor through the flexible layout of the auxiliary sensors, has compact structure of the whole propulsion system, and meets the requirements of light weight, miniaturization and high reliability of the propulsion system.
Description
Technical Field
The invention belongs to the technical field of ship propulsion systems, and particularly relates to an outboard deep water pressure self-balancing propulsion motor which has the characteristics of light weight, miniaturization and high reliability while meeting various required functions and performance requirements.
Background
In the deep sea high pressure environment, after the propulsion motor adopts the pressure balancing device, the propulsion system has the following advantages: keeping the balance of the internal pressure and the external pressure of the system. Because the internal pressure and the external pressure are balanced, the pressure on the system element is smaller, so that the large pressure is not considered when the system element is designed, and even non-metallic materials can be used, thereby greatly reducing the mass and the volume of the system. Secondly, the system is easy to seal. Because the internal and external pressure difference is not large, the static seal does not bear the high pressure of the marine environment, so that the seal is easy and is not easy to leak. Thirdly, seawater infiltration is prevented, and because the internal pressure and the external pressure of the system are balanced, seawater is not easy to enter the system.
The soft-bag type pressure balancing device uses the rubber soft bag as an elastic element, force loss and pressure in the elastic deformation process of the soft bag form a nonlinear relation, and larger additional axial force can be generated, so that the internal and external pressure difference is difficult to determine. Under the adverse circumstances in deep sea, the soft bag is easily damaged when being collided, and the change of the structural shape of the soft bag has uncertainty, the position of the mass center is uncertain, and the spring is inconvenient to set, so that the applicability of the soft bag type pressure balancing device under the large pressure environment in deep sea is limited.
Disclosure of Invention
In order to overcome the defects in the prior art, the inventor of the invention carries out intensive research, provides an outboard deep water pressure self-balancing propulsion motor, carries out innovative design aiming at a pressure regulating device, can effectively monitor the running condition of the motor through the flexible layout of auxiliary sensors, has a compact structure of the whole propulsion system, and can realize the requirements of light weight, miniaturization and high reliability of the propulsion system, thereby completing the invention.
The technical scheme provided by the invention is as follows:
an outboard deepwater pressure self-balancing propulsion motor, comprising: an output shaft, a rotary dynamic seal, a motor body, a pressure balance mounting seat, a pressure regulating device and an oil charging and discharging assembly, wherein,
the output shaft is a hollow shaft body and is supported and fixed on the axis of the motor body through a bearing;
the rotary dynamic seal is arranged at the output shaft end of the motor body and is used for rotary sealing between the motor body and an external water environment;
the pressure balance mounting seat is fixed at the rear end of the motor body and divides the outside of the motor body into an oil cavity and an external cavity, the oil cavity is communicated with the motor body, oil liquid is filled in the oil cavity, and the external cavity is communicated with a water environment;
the pressure regulating device is fixed in an external cavity of the pressure balance mounting seat, an oil bag communicated with an oil cavity of the pressure balance mounting seat is arranged in the pressure regulating device, the volume of oil in the motor body is changed by bearing the pressure of external water environment, and the balance of internal and external pressure of the motor is promoted;
the oil charging and discharging assembly is fixed in the pressure balance mounting seat and used for filling, sealing and discharging oil in the motor.
The outboard deep water pressure self-balancing propulsion motor provided by the invention has the following beneficial effects:
(1) the pressure self-balancing propulsion motor can realize integrated oil bag type pressure regulation, and comprises the following components: i) the design of the oil bag ensures that the pressure regulating range is large; ii) because external water directly applies force to the oil sac, the resistance in the movement process is small, lubrication is not needed, and the possibility of clamping stagnation is avoided; iii) the oil bag has the highest pressure bearing capacity under the conditions of same material, thickness, diameter and use environment; iv) the oil bag is made of rubber materials, so the sealing is very reliable, and the sealing part of the oil bag seat is static sealing, so the leakage condition can not occur; v) the integral design of the whole structure of the pressure regulating device provides reliable protection space for the oil bag, effectively protects the oil bag, is not easy to damage, and has high reliability and the like;
(2) the dynamic seal of the pressure self-balancing propulsion motor adopts an integrated design, is integrally disassembled and assembled, and is convenient to maintain and replace at regular intervals;
(3) the filling hole and the oil drain hole in the pressure self-balancing propulsion motor are integrally formed with the pressure balancing mounting seat, and the whole length of the propulsion motor is saved by adopting an embedded design compared with the mounting mode of an oil filling and discharging component in the prior art;
(4) according to the pressure self-balancing propulsion motor, the end part of the motor stator is provided with the insulation detection point, so that the liquid insulation in the motor is detected in real time, and the water leakage condition of the motor is collected. Meanwhile, a temperature detection sensor is arranged at a motor winding to collect the internal temperature of the motor in real time;
(5) according to the pressure self-balancing propulsion motor, the water leakage detection element, the temperature detection element and the pressure detection element are embedded in the motor, the temperature, the pressure and the water leakage condition can be fed back to the control driver, the power can be reduced and output when the temperature is over-temperature, the maintenance can be found in time when water is leaked, the pressure change is monitored, and the reliability of the motor is improved;
(6) the pressure self-balancing propulsion motor comprises 5 9-slot 2-pole double-layer short-distance distributed fractional slot winding unit motors, each phase of the 45-slot 10-pole double-layer short-distance distributed fractional slot winding permanent magnet synchronous motor with 5 parallel branches is adopted, and the permanent magnet adopts an eccentric design, so that the air gap flux density is as close to sine as possible, and the electromagnetic force harmonic content is reduced.
Drawings
Fig. 1 is a schematic structural view of an outboard deep water pressure self-balancing propulsion motor in a preferred embodiment of the invention;
FIG. 2 is a schematic structural diagram of a pressure regulating device according to a preferred embodiment of the present invention;
FIG. 3 shows a partial schematic of FIG. 2;
FIG. 4 is a schematic view of a rotary seal in accordance with a preferred embodiment of the present invention;
fig. 5 is a schematic structural view illustrating an oil charging and discharging assembly according to a preferred embodiment of the present invention.
Description of the reference numerals
1-an output shaft; 2, rotating and sealing; 21-a sealing seat; 22-dynamic seals; 23-O-ring seals; 3-the motor body; 4-a pressure balance mounting seat; 5-a pressure regulating device; 51-oil pocket; 52-oil bag seat; 53-oil pocket protection cover; 531-limber holes; 54-a connecting shaft; 6-oil charging and discharging assembly; 61-filling hole; 62-oil drain hole; 63-filling a valve; 64-plug; 7-Watertight sockets.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.
The invention provides an outboard deepwater pressure self-balancing propulsion motor, as shown in figure 1, comprising: an output shaft 1, a rotary dynamic seal 2, a motor body 3, a pressure balance mounting seat 4, a pressure regulating device 5 and an oil charging and discharging component 6, wherein,
the hollow shaft body of the output shaft 1 is supported and fixed on the axis of the motor body 3 through a bearing;
the rotary dynamic seal 2 is arranged at the output shaft end of the motor body and is used for rotary sealing between the motor body 3 and an external water environment;
the pressure balance mounting seat 4 is fixed at the rear end of the motor body 3, so that the exterior of the motor body 3 is divided into an oil cavity and an external cavity, the oil cavity is communicated with the motor body 3, oil is filled in the oil cavity, and the external cavity is communicated with a water environment;
the pressure regulating device 5 is fixed in an external cavity of the pressure balance mounting seat 4, an oil bag 51 communicated with an oil cavity of the pressure balance mounting seat is arranged in the pressure regulating device, the volume of oil in the motor body 3 is changed by bearing the pressure of external water environment, and the balance of internal and external pressure of the motor is promoted;
the oil charging and discharging assembly 6 is fixed in the pressure balance mounting seat 4 and used for filling, sealing and discharging oil in the motor.
In the present invention, the motor body 3 includes a stator, a rotor, and a winding for providing a driving force. In order to adapt to the application working condition of seawater and meet the requirements of vibration reduction and noise reduction of a propulsion motor, a motor stator consists of 5 motors with 9 slots and 2 poles, and a permanent magnet synchronous motor with 45 slots and 10 poles and short-distance distributed fractional slot windings with 5 parallel branches in each phase is adopted, and the permanent magnet adopts an eccentric design, so that the air gap flux density is as close to sine as possible, and the electromagnetic force harmonic content is reduced.
In the invention, as shown in fig. 2, the pressure regulating device 5 comprises an oil bag 51, an oil bag seat 52, an oil bag protective cover 53 and a connecting shaft 54, wherein oil is contained in the oil bag 51, the oil bag is located in a shell enclosed by the oil bag seat 52 and the oil bag protective cover 53, and the oil bag protective cover 53 is provided with a water through hole 531 for introducing external water into the shell to extrude the oil bag; the connecting shaft 54 is of a hollow T-shaped structure, the large-end baffle structure is positioned in the oil bag 51, the oil bag 51 and the oil bag seat 52 are tightly pressed on the pressure balance mounting seat 4, the small-end flow guide pipe structure sequentially penetrates through the oil bag 51 and the oil bag seat 52 and then enters an oil cavity of the pressure balance mounting seat 4, and the small-end flow guide pipe structure is fastened and fixed through a double fastening nut and a gasket which are sleeved on the small end; the oil bag 51 is communicated with oil in the motor body 3 through a connecting shaft 54, and pressure self-balancing is achieved through oil flowing and external water environment pressure.
In a preferred embodiment, a housing enclosed by the oil bag seat 52 and the oil bag protective cover 53 is a D-shaped housing, and a portion where the oil bag seat 52 is fixedly connected with the pressure balance mounting seat 4 is a planar section of the D-shaped housing.
Further, the profile sections of the housing enclosed by the oil bag seat 52 and the oil bag protective cover 53 are transited by fillets. The oil sac is contracted and contracted in the shell, the oil sac is attached to the wall surface of the shell when the interior of the oil sac is filled with oil, if non-smooth transition exists, the local oil sac possibly cannot be attached to the wall surface of the shell, the deformation and the stress of the oil sac are unstable, and the self-balancing stability of the motor is reduced after the motor is used for a long time.
In a preferred embodiment, the abutting portion of the oil bladder seat 52 and the oil bladder protective cover 53 is fastened by a screw connection such as a bolt and a nut.
In a preferred embodiment, an O-ring seal is disposed between the bladder seat 52 and the pressure balance mounting seat 4.
In a preferred embodiment, as shown in fig. 3, a connecting section of the oil bladder 51 and the oil bladder seat 52 has a corrugated connecting section, and the oil bladder 51 and the oil bladder seat 52 form a concave-convex fit at the corrugated section.
In a preferred embodiment, as shown in fig. 3, an O-ring is provided between the large end of the connecting shaft 54 and the oil bladder 51 to prevent oil leakage or external water from entering.
In a preferred embodiment, as shown in fig. 3, a step structure that is transited to a large-end baffle structure is processed at the root of the small end of the connecting shaft 54, and the thickness of the oil bladder 51 corresponds to the height of the step structure, so that the outer diameter of the joint between the connecting shaft 54 and the oil bladder 51 is larger than the outer diameter of the joint between the connecting shaft 54 and the oil bladder seat 52, that is, the oil bladder 51, the oil bladder seat 52 and the connecting shaft 54 are non-equal-diameter sealed, and the sealing performance is obviously better than the equal-diameter sealing effect.
In a preferred embodiment, the water holes 531 of the oil bag protection cover 53 are distributed in the middle part of the oil bag protection cover, so that the oil bag protection cover 53 is convenient to process and maintain the structural strength of the oil bag protection cover 53.
In the invention, a watertight socket 7 is arranged at an oil cavity of the pressure balance mounting seat 4, and a power supply mechanism and a control driver are externally connected to supply power to a motor and collect signals of various sensors.
In a preferred embodiment, a protective shell is installed at the rear end of the pressure balance mounting seat 4, is used for protecting the pressure regulating device 5, and encloses an external cavity with the pressure balance mounting seat 4.
In the present invention, as shown in fig. 4, the rotary dynamic seal 2 includes a seal seat 21, a dynamic seal 22 and an O-ring 23, and is integrally installed on the motor body 3, the dynamic seal 22 is installed in the seal seat 21, and O-rings are installed at the connection between the dynamic seal 22 and the output shaft 1, the connection between the seal seat 21 and the motor body 3, and the connection between the seal seat 21 and the dynamic seal 22 for sealing, and the dynamic seal is convenient to disassemble, assemble and replace.
In the present invention, as shown in fig. 5, the oil charging and discharging assembly 6 includes a charging hole 61, an oil discharging hole 62, a charging valve 63 and a plug 64, wherein the charging hole 61 and the oil discharging hole 62 are integrally formed with the pressure balance mounting seat 4 and are communicated with the oil chamber; the filling valve 63 is arranged in a pore channel of the filling hole 61, and the plugs 64 are respectively arranged in pore channels of the filling hole 61 and the oil drain hole 62 and used for plugging oil. The charge and discharge oil assembly adopts an embedded design, and compared with the installation mode of the charge and discharge oil assembly in the prior art, the whole length of the propulsion motor is saved.
In the invention, the pressure self-balancing propulsion motor further comprises a water leakage detection element, wherein the water leakage detection element is arranged inside the motor body 3 and is used for collecting the water leakage condition of the motor, reporting the collection result to the control driver and monitoring the water leakage condition of the motor in real time.
In the invention, the pressure self-balancing propulsion motor further comprises a temperature detection element, wherein the temperature detection element is arranged at a winding of the motor and is used for collecting the internal temperature of the motor, reporting the collection result to the control driver and monitoring the internal temperature of the motor in real time.
In the invention, the pressure self-balancing propulsion motor also comprises a pressure detection element, wherein the pressure detection element is arranged in an oil cavity of the pressure balancing mounting seat 4 and is used for measuring the oil pressure in the motor, reporting the oil pressure to the control driver and monitoring the pressure difference inside and outside the motor in real time by combining the external water environment pressure.
In the invention, the pressure self-balancing propulsion motor also comprises an alarm element, and when the sealing failure external water enters the motor body or the internal temperature of the motor exceeds a limit value, the alarm element is started to prompt the sealing failure motor to enter water or be at a high temperature.
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (10)
1. The utility model provides an outboard deep water pressure self-balancing propulsion motor which characterized in that includes: an output shaft (1), a rotary dynamic seal (2), a motor body (3), a pressure balance mounting seat (4), a pressure regulating device (5) and an oil charging and discharging component (6),
the output shaft (1) is a hollow shaft body and is supported and fixed on the axis of the motor body (3) through a bearing;
the rotary seal (2) is arranged at the output shaft end of the motor body and is used for rotary seal of the motor body (3) and an external water environment;
the pressure balance mounting seat (4) is fixed at the rear end of the motor body (3) and divides the outside of the motor body (3) into an oil cavity and an external cavity, the oil cavity is communicated with the motor body (3), oil is filled in the oil cavity, and the external cavity is communicated with a water environment;
the pressure regulating device (5) is fixed in an external cavity of the pressure balance mounting seat (4), the pressure regulating device (5) comprises an oil bag (51) which is arranged in the pressure regulating device and communicated with an oil cavity of the pressure balance mounting seat, an oil bag seat (52), an oil bag protective cover (53) and a connecting shaft (54), wherein oil is contained in the oil bag (51), the oil bag is positioned in a shell formed by the oil bag seat (52) and the oil bag protective cover (53), and the oil bag protective cover (53) is provided with a water through hole (531) for introducing external water into the shell to extrude the oil bag, so that the volume of the oil in the motor body (3) is changed by bearing the pressure of external water environment, and the balance of the internal pressure and the external pressure of the motor is promoted; the connecting shaft (54) is of a hollow T-shaped structure, the large-end baffle structure is positioned in the oil bag (51), the oil bag (51) and the oil bag seat (52) are tightly pressed on the pressure balance mounting seat (4), and the small-end flow guide pipe structure sequentially penetrates through the oil bag (51) and the oil bag seat (52) and then enters an oil cavity of the pressure balance mounting seat (4) and is fastened and fixed through a double fastening nut and a gasket which are sleeved on the small end; the oil bag (51) is communicated with oil in the motor body (3) through a connecting shaft (54);
the oil charging and discharging assembly (6) is fixed in the pressure balance mounting seat (4) and used for filling, sealing and discharging oil in the motor.
2. The outboard deep water pressure self-balancing propulsion motor according to claim 1, wherein a casing enclosed by the oil bag seat (52) and the oil bag protective cover (53) is a D-shaped casing, and a portion where the oil bag seat (52) is fixedly connected with the pressure balancing mounting seat (4) is a plane section of the D-shaped casing.
3. The outboard deep water pressure self-balancing propulsion motor of claim 1, wherein the profile sections of the casing enclosed by the oil bladder seat (52) and the oil bladder protective cover (53) are in rounded transition.
4. The outboard deepwater pressure self-balancing propulsion motor of claim 1, wherein an O-ring seal is sleeved between the oil bag seat (52) and the pressure balancing mounting seat (4).
5. The outboard deepwater pressure self-balancing propulsion motor of claim 1, characterized in that a connection section of the oil bladder (51) and the oil bladder seat (52) has a corrugated connection section where the oil bladder (51) and the oil bladder seat (52) form a male-female fit.
6. The outboard deep water pressure self-balancing propulsion motor of claim 1, wherein an O-ring seal is provided between the large end of the connecting shaft (54) and the oil bladder (51).
7. The outboard deep water pressure self-balancing propulsion motor according to claim 1, wherein a step structure transitioning to a large-end baffle structure is processed at a root of a small end of the connecting shaft (54), and a thickness of the oil bag (51) corresponds to a height of the step structure, so that an outer diameter of a position where the connecting shaft (54) is matched with the oil bag (51) is larger than an outer diameter of a position where the connecting shaft is matched with the oil bag seat (52).
8. The outboard deep water pressure self-balancing propulsion motor according to claim 1, wherein the rotary seal (2) comprises a seal seat (21), a dynamic seal (22) and an O-ring (23), the rotary seal is integrally mounted on the motor body (3), the dynamic seal (22) is mounted in the seal seat (21), and the O-ring is mounted at the connection of the dynamic seal (22) and the output shaft (1), the connection of the seal seat (21) and the motor body (3), and the connection of the seal seat (21) and the dynamic seal (22) for sealing.
9. The outboard deep water pressure self-balancing propulsion motor of claim 1, wherein the oil charging and discharging assembly (6) comprises a charging hole (61), an oil discharging hole (62), a charging valve (63) and a plug (64), the charging hole (61) and the oil discharging hole (62) are integrally formed with the pressure balancing mounting seat (4) and are communicated with the oil cavity; the filling valve (63) is arranged in a pore channel of the filling hole (61), and the plugs (64) are respectively arranged in pore channels of the filling hole (61) and the oil drain hole (62) and used for plugging oil.
10. The outboard deepwater pressure self-balancing propulsion motor of claim 1, further comprising a water leakage detection element, wherein the water leakage detection element is mounted inside the motor body (3) and is used for collecting water leakage of the motor and reporting the collection result to the control driver;
the pressure self-balancing propulsion motor also comprises a temperature detection element, wherein the temperature detection element is arranged at a winding of the motor and is used for collecting the internal temperature of the motor and reporting the collection result to the control driver;
the pressure self-balancing propulsion motor also comprises a pressure detection element, wherein the pressure detection element is arranged in an oil cavity of the pressure balancing mounting seat (4) and is used for measuring the oil pressure in the motor, reporting the oil pressure to the control driver and monitoring the internal and external pressure difference of the motor by combining the external water environment pressure;
the pressure self-balancing propulsion motor further comprises an alarm element for prompting the existence of abnormal conditions in the motor.
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| CN202011192108.7A CN112531956B (en) | 2020-10-30 | 2020-10-30 | Outboard deep water pressure self-balancing propulsion motor |
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| CN202011192108.7A CN112531956B (en) | 2020-10-30 | 2020-10-30 | Outboard deep water pressure self-balancing propulsion motor |
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| JPH05304739A (en) * | 1992-04-27 | 1993-11-16 | Ebara Corp | Canned underwater motor |
| CN101408180A (en) * | 2007-10-10 | 2009-04-15 | 衡阳市大力成泵业制造有限责任公司 | Filling type submersible electric pump of with pressure release self-explosion-proof device |
| CN101752937B (en) * | 2008-12-05 | 2011-06-15 | 中国科学院沈阳自动化研究所 | Compensated underwater brushless DC motor structure and assembly method thereof |
| CN203384080U (en) * | 2013-06-04 | 2014-01-08 | 周林 | Submerged infusion pump capable of automatically adjusting inner cavity pressure of motor |
| CN104682608B (en) * | 2015-03-03 | 2017-05-17 | 青蛙泵业有限公司 | multiple sealing motor for deep well pump |
| CN206211725U (en) * | 2016-11-29 | 2017-05-31 | 中国科学院海洋研究所 | Deep-sea pump |
| CN110212679A (en) * | 2019-06-04 | 2019-09-06 | 海城三鱼泵业有限公司 | A kind of fountain oil charging motor |
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