A pod propulsion motor cooling structure

Abstract

The application discloses a kind of pod propulsion motor cooling structure, including machine base, connecting in the lower part of machine base's fin and being arranged in the stator and rotor of machine base, the stator is composed of core, straight section winding and end winding, the rotor is composed of rotor shaft, rotor yoke and rotor permanent magnet pole;The machine base is in the end winding place and is provided with the spray cooling system consisting of pump group, connecting pipeline and spray head, the fin inside is provided with the oil storage depot being communicated with machine base, the application makes full use of the fin structure of pod propeller, solves the problem that local part of propulsion motor is not good cooling, simultaneously realizes cold and hot self-circulation inside, does not need external interface, simultaneously reduces the volume weight of motor, improves the overall efficiency of pod propeller.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of ship and ocean engineering technology electric propulsion, and particularly relates to a kind of pod propulsion motor cooling structure. BACKGROUND

[0002] Pod propeller is a kind of highly integrated ship electric propulsion device, which integrates propeller motor and propeller together and is placed outside the cabin, and the propeller motor is generally a permanent magnet motor, and the rotor is composed of permanent magnets.

[0003] Pod propeller has simple and compact overall structure, small size and flexible installation. The smaller the propeller motor of the pod propeller is, the smaller the overall hub diameter ratio is, the higher the overall hydrodynamic efficiency is, and the lighter the weight is, and the smaller the installation difficulty is.

[0004] Although the outer surface of the propeller motor is immersed in seawater for cooling, the heat of the end winding of the stator needs to be transmitted back to the iron core straight section first and then to the machine base, and the thermal resistance is very large. At the same time, the heat of the rotor magnet is difficult to dissipate, and the local temperature is prone to be too high after a long time. Some motors are completely sealed at the end of the stator, which is very costly and has the risk of cracking after a long time, or the motor heat load is small, but the volume and weight will increase, or an external cooling medium is introduced, but it needs to pass through the slip ring part of the pod propeller, which has a very complex structure, and a secondary cooling system needs to be provided in the cabin, which occupies volume and weight and increases the system difficulty. SUMMARY

[0005] In order to solve the above problems in the prior art, the present application proposes a kind of pod propulsion motor cooling structure, which optimizes the heat dissipation of the stator end winding and the rotor.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application to solve its technical problems is: a kind of pod propulsion motor cooling structure, including machine base, anti-rolling fin connected to the lower part of the machine base and stator and rotor arranged in the machine base, the stator is composed of iron core, straight section winding and end winding, the rotor is composed of rotor shaft, rotor yoke and rotor permanent magnet pole, the machine base is provided with a spray cooling system composed of pump group, connecting pipeline and spray head at the end winding, the anti-rolling fin is provided with an oil storage warehouse communicating with the machine base as an oil storage and cooling space, the spray head near the end winding sprays oil to directly cool the stator and the rotor end related area, the heated oil falls into the oil storage warehouse of the anti-rolling fin at the lower part of the machine base to exchange heat to the outer surface of the machine base, which is cooled by the seawater outside, and then is pumped back to the spray cooling system by the pump group and sprayed out by the spray head to form internal self-circulation cooling.

[0007] The gap channel in the lower part of the iron core forms an oil channel in the machine base, facilitating the backflow of oil to the oil storage bin and the introduction of oil to the pump group through the pipeline from the oil inlet of the oil injection device.

[0008] The machine base is also provided with a liquid level meter, and the pump group adjusts the rotation speed of the pump group according to the feedback signal of the liquid level meter to freely adjust the liquid level as needed.

[0009] The spray head has multiple groups, respectively facing the end winding, the rotor and the pump group.

[0010] The fin and the machine base can be connected by bolts or welding, so that the fin is fixed on the machine base.

[0011] The pump group inlet can be arranged with a filter as needed.

[0012] The pump group is arranged as close as possible to the end cover of the machine base through the oil pump mounting seat, and a maintenance window is provided on the end cover.

[0013] The beneficial effects of the present application are: by setting the spray device at the end part of the motor stator and rotor, cooling the relevant parts by oil, the heated oil flows into the lower fin, exchanges heat to the seawater on the surface of the machine base, and through the pump group, the oil is sprayed to the end part of the stator winding and the end part of the rotor through the spray head, forming a self-circulation and self-cooling oil channel inside, without additional cooler and external interface, improving the cooling effect, reducing the volume and weight of the motor, and improving the overall efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the first embodiment of the present application;

[0015] Figure 2 It is the oil circulation schematic diagram of the first embodiment of the present application.

[0016] The reference signs are: 1-machine base, 21-iron core, 23-end winding, 3-rotor, 31-rotor shaft, 4-spray cooling system, 41-pump group, 42-connection pipeline, 43-spray head, 44-liquid level meter, 45-mounting frame, 46-filter, 47-oil pump mounting seat, 48-oil injection device oil inlet, 5-fin. DETAILED DESCRIPTION

[0017] The embodiments of the present application will be described in detail below with reference to the drawings. It should be understood by those skilled in the art that the embodiments are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. For example, although the various components in the drawings are drawn in a specific proportion, these proportion relationships are only exemplary, and those skilled in the art can adjust them as needed to adapt to specific application occasions.

[0018] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0019] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the connection between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] Referring to Figure 1 , Figure 2 The present application discloses a kind of pod propulsion motor cooling structure, including machine base 1, connecting in the lower part of machine base 1 and being provided in the stator and rotor 3 of machine base 1 fin 5, machine group is by machine base frame and machine base internal pipeline composition, the stator is by core 21, straight segment winding and end winding 23 composition, the rotor 3 is by rotor shaft 31, rotor yoke and rotor permanent magnet pole composition;The machine base 1 is provided with by pump group 41, connecting pipeline 42 and shower head 43 composition spray cooling system 4 at end winding 23, the inside of the fin 5 is provided with the oil storage warehouse of communication machine base 1, as the storage, cooling space of oil, the shower head 43 near end winding 23 is arranged and sprays oil liquid directly cooling stator and rotor 3 end related area, heated oil liquid falls into the oil storage warehouse of fin 5 in the lower part of machine base 1 and exchanges heat to the outer surface of machine base 1 after being cooled by outside seawater, then is pumped back to spray cooling system 4 by pump group 41, is sprayed in shower head 43, forms internal self-circulation cooling system.Stator straight segment winding heat is dissipated to seawater through the outer surface of machine base, while machine base can maintain a certain liquid level height, can cool the pole on the surface of rotor, according to the signal feedback of the set liquid level gauge, can be freely adjusted liquid level according to needs by adjusting the rotating speed of pump group.

[0021] The machine base 1 is provided with a gap passage at the lower part of the iron core 21 to form an oil channel, so that the oil flowing back to the oil storage tank and the oil introduced into the pump group 41 through the pipe from the oil inlet 48 of the oil injection device can be sprayed out from the shower head 43 through the pipe from the fin 5 to cool the corresponding area.

[0022] The machine base 1 is also provided with a liquid level gauge 44, and the pump group 41 adjusts the rotating speed of the pump group 41 according to the feedback signal of the liquid level gauge 44 to freely adjust the liquid level as needed. The liquid level at the lower part of the machine base 1 can be maintained at a certain height to cool the outer surface of the rotor 3 and the part of the stator immersed therein. The oil level at the bottom of the machine base 1 can be designed as needed, and is generally set at the high point of both the pump group 41 and the outer surface of the rotor 3. The oil level can also be lowered or raised as needed, which can be achieved by setting the liquid level gauge 44 and then freely adjusting the liquid level by controlling the rotating speed of the pump group 41 according to the feedback signal.

[0023] The shower head 43 has multiple groups supported by the mounting frame 45 and respectively faces the end winding 23, the rotor 3 and the pump group 41. The pump group 41 can be sprayed and cooled by a special pipe. The shower head 43 can spray towards the end winding 23 of the stator and rotor as needed, or only spray part of the area. After the oil is sprayed out, it flows back to the lower part of the machine base 1, and the gap passage is provided at the lower part of the machine base 1 or between the machine base 1 and the iron core 21, so that the oil can flow back to the fin in the lower part.

[0024] The fin 5 and the machine base 1 can be connected by bolts or welding, so that the fin 5 is fixed on the machine base 1 and does not move. The internal space of the fin 5 serves as an oil storage and cooling space, and the oil in the fin 5 can dissipate heat to seawater through its surface.

[0025] A filter 46 can be arranged at the inlet of the pump group 41 as needed, and the pump group 41 is arranged as close as possible to the end cover of the machine base 1 through the oil pump mounting seat 47. In this way, a maintenance window is provided on the end cover, so that the pump group 41 and the filter 46 can be replaced and maintained.

[0026] The present patent solves the problem of poor cooling of local parts of the propulsion motor by using a new cooling structure and fully utilizing the fin structure of the pod propeller. The internal cold and hot self-circulation is realized without the need for external interfaces, and the volume and weight of the motor are reduced, thereby improving the overall efficiency of the pod propeller.

[0027] The fin can be moved axially to the end pump group position according to the overall arrangement, and the oil passage connection of the pump group and the fin will be simpler and more convenient at this time.

[0028] The above embodiments only illustrate the principles and effects of the present application and some applied embodiments, and for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A kind of pod propulsion motor cooling structure, including machine base (1), the fin (5) of reducing roll connected in the lower part of machine base (1) and the stator and rotor (3) being set in machine base (1), the stator is made of core (21), straight section winding and end winding (23), the rotor (3) is made of rotor shaft (31), rotor yoke and rotor permanent magnet pole;Its characterized in that: The machine base (1) is provided with a spray cooling system (4) composed of a pump group (41), a connecting pipeline (42) and a spray head (43) at the end winding (23) of the machine base (1), the fin stabilizer (5) is internally provided with an oil storage bin communicated with the machine base (1), the spray head (43) sprays oil to directly cool the end of the stator and rotor (3), the heated oil falls into the oil storage bin of the fin stabilizer (5), is cooled by the outside seawater, is then pumped back to the spray cooling system (4) by the pump group (41), is sprayed out through the spray head (43), and forms internal self-circulation cooling, the machine base (1) is internally provided with an oil channel located at the lower part of the iron core (21), and the oil flowing back to the oil storage bin is introduced into the pump group (41) through an oil inlet (48) of the oil injection device.

2. A pod propulsion motor cooling structure according to claim 1, characterized in that, The machine base (1) is further provided with a liquid level meter (44), and the pump group (41) adjusts the liquid level height according to the feedback signal of the liquid level meter (44).

3. A pod propulsion motor cooling structure according to claim 1 or 2, characterized in that The spray head (43) has multiple groups and is respectively directed to the end winding (23), the rotor (3) and the pump group (41).

4. A pod propulsion motor cooling structure according to claim 3, wherein The fin stabilizer (5) and the machine base (1) are connected through bolts or welding.

5. A pod propulsion motor cooling structure according to claim 4, wherein The pump group (41) is arranged at the inlet of the pump group (41).

6. A pod propulsion motor cooling structure according to claim 5, wherein The pump group (41) is arranged near the end cover of the machine base (1) through an oil pump mounting seat (47), and a maintenance window is correspondingly arranged on the end cover.

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