KR20100079519A - The separated two cooling systems of electric moter for submarine - Google Patents

Abstract

PURPOSE: The separated two cooling systems of an electric motor for a submarine are provided to improve the cooling efficiency of the electric motor by appropriately adopting a cooling system according to the heated state of the stator of the electric motor. CONSTITUTION: A first cooling path is formed on the outer circumference of a stator(140). A cooling fluid flows through the first cooling path in order to cool the stator. A second cooling path is formed in parallel with the one side of the first cooling path. A first cooling circuit(150) supplies the cooling fluid to the first cooling path. A second cooling circuit(160) supplies the cooling fluid to the second cooling path. The second cooling circuit is separately operated from the first cooling circuit.

Description

Two separate cooling systems for electric motors for underwater vehicles {THE SEPARATED TWO COOLING SYSTEMS OF ELECTRIC MOTER FOR SUBMARINE}

The present invention relates to two independent cooling systems of electric motors for submarines, and more particularly, to independently operate two cooling systems so that the cooling system can be stably operated even in an emergency situation, and the configuration and space of the cooling system can be controlled. It relates to two independent cooling systems for submersible electric motors that can be effectively utilized.

Electric motors are provided according to the development demand of high performance and high power electric equipment. Since heat loss inevitably occurs in such an electric motor, it is necessary to effectively remove heat generated from an electric device.

The main configuration of such an electric motor includes a frame, a stator core, a rotating shaft, and a rotor in the frame, and a stator coil is formed in the stator core to generate an electromagnetic force according to the rotation of the rotor. Here, the outside of the stator is provided with a cooling device for cooling the heat generated in the stator coil and the stator core in accordance with the rotation of the rotor.

The cooling device for cooling the electric motor is a method of cooling the electric motor by supplying air cooled to the electric motor using a cooling fan, or by providing cold water around the electric motor.

It may also cause noise and vibration caused by the flow of the cooling method air using the cooled air. In addition, a space for installing a separate heat exchanger must be secured and the size of the heat exchanger also increases according to the capacity of the large electric motor.

In the case of an electric motor that is applied to a large ship that does not have a significant effect on space, noise, vibration, etc., the cooling air is supplied to the electric motor as described above. Difficult to repair and replace.

In addition, since the cooling system for cooling the electric motor generally uses one cooling system to cool the electric motor, there is a problem that the electric motor is operated in a heated state when the cooling system is not operated.

The present invention can reduce vibration and noise by using two cooling systems, and provides two independent cooling systems of submersible electric motors.

The present invention provides two independent cooling systems of submersible electric motors that can cool the heat generated by an electric motor using another cooling system even when one cooling system does not operate using two cooling systems. .

The present invention provides two independent cooling systems of submersible electric motors, which are easy to maintain and maintain.

In order to solve the above problems, two independent cooling systems of an electric motor for a submarine having a stator provided spaced apart from the rotor and the outer circumference of the rotor are formed on the outer circumferential surface of the stator to cool the stator. A first cooling passage through which flow; A second cooling passage formed side by side on the first cooling passage; A first cooling circuit for supplying a cooling fluid to the first cooling passage; And a second cooling circuit which supplies a cooling fluid to the second cooling passage and operates independently from the first cooling circuit, wherein a flow direction of the cooling fluid flowing through the first cooling passage is cooling in the second cooling passage. It is characterized by the same as the flow direction of the fluid.

By the above configuration, it is possible to reduce the vibration and noise of the cooling system, and to provide two independent cooling systems of the electric motor for submarines that can be miniaturized. In addition, even when one cooling system does not operate using two cooling systems, another cooling system may be used to cool the heat generated by the electric motor.

The first cooling circuit and the second cooling circuit may include two pumps for circulating the cooling fluid to pass through the first cooling channel and the second cooling channel, respectively. Pumps with low power consumption can be used, and both pumps can be used for maximum cooling. By configuring as described above, the electric motor can be stably cooled by appropriately using two pumps in accordance with the circulation state of the cooling fluid.

In addition, the circulation of the two pumps can be adjusted according to the calorific value of the stator. The cooling fluid can be circulated according to the calorific value of the stator. As described above, a pump with low power consumption can be used for the basic circulation of the cooling fluid, and both pumps can be used for the maximum circulation. This may be determined according to the calorific value of the stator. By adjusting the circulation of the two pumps in accordance with the calorific value of the stator as described above, it is possible to effectively cool according to the heat generated in the stator.

The first cooling circuit and the second cooling circuit may be connected to each other by a system connection valve. As such, the first and second cooling circuits are connected to each other by the system connection valve, thereby cooling the electric motor in the same manner, and it is easy to adjust the first and second cooling circuits.

In this case, the first cooling passage and the second cooling passage may be formed in a zigzag form. As the first and second cooling passages are formed in a zigzag as described above, an area in which the outer circumferential surface of the stator and the cooling fluid may contact each other may increase, and as a result, cooling of the generated stator may be facilitated.

Meanwhile, the first cooling passage and the second cooling passage may be formed to correspond to each other. By configuring as described above, when one of the two cooling system failure occurs due to an unforeseen accident, the remaining one cooling system is operated, the cooling of the electric motor can be made. Accordingly, by forming the first cooling passage and the second cooling passage in a form corresponding to each other, the cooling system can operate even in the event of an electric motor accident that may occur in advance.

The two independent cooling systems of the electric motor for submarines of the present invention can improve the cooling efficiency of the electric motor by appropriately using the cooling system according to the heat generation state of the stator of the electric motor using two independent cooling systems.

In the two independent cooling system of the electric motor for submarines according to the present invention, even if one cooling system does not operate using two cooling systems connected to a flow path, the other cooling system operates to generate heat generated by the electric motor. It can cool suitably.

The two independent cooling systems of the electric motor for submarines of the present invention can be miniaturized by using two independent cooling systems, and can be easily maintained and repaired.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the configuration and operation according to an embodiment of the present invention. The following description is one of several aspects of the patentable invention and the following description forms part of the detailed description of the invention. However, in describing the present invention, a detailed description of known functions or configurations will be omitted for clarity of the gist of the present invention.

1 is a perspective view showing an electric motor to which two independent cooling systems of an electric motor for submarines according to an embodiment of the present invention are applied, FIG. 2 is an enlarged view of a region A of FIG. 1, and FIG. 2 is a schematic diagram of an electric motor to which two independent cooling systems of the electric motor for submarines are applied.

Here, the submarine means a vessel or the like maneuvering in the water, such as a submarine.

Referring to the drawings, the electric motor 100 for the submarine is a rotating shaft rotatable about the stator 140, the stator 140 and the rotor 120 and the rotor 120 spaced a predetermined distance in the frame 110 ( 120).

At this time, the outer circumferential surface of the stator 140 is parallel to one side of the first cooling passage 152 and the first cooling passage 152 through which a cooling fluid capable of cooling the heat generated by the rotation of the electric motor 100 for the subsea is flowed. The second cooling passage 162 may be formed.

In addition, the electric motor 100 for the submarine is supplied with a cooling fluid to the first cooling circuit 150 and the second cooling passage 162 that can supply the cooling fluid to the first cooling passage 152, the first cooling circuit ( It may include a second cooling circuit 160 that can operate independently of 150.

At this time, the flow direction of the cooling fluid flowing in the first and second cooling circuit 160 may flow in the same direction.

Here, the first cooling circuit 150 and the second cooling circuit 160 may include two pumps to allow the cooling fluid to pass through the first cooling passage 152 and the second cooling passage 162, respectively. That is, the first cooling circuit 150 may include two cooling pumps 157a and 157b, and the second cooling circuit may also include two cooling pumps 167a and 167b.

At this time, when the cooling fluid flowing through the first and second cooling circuits 160 circulates basically, a pump (for example, 157a, 167a) having low power consumption is used among the two pumps 157a, 157b, 167a, and 167b. In order to maximally cool the submersible electric motor 100, two pumps 157a, 157b, 167a, and 167b may be used.

As described above, the cooling fluid flows to the first or second cooling circuit 160 using the two pumps 157a, 157b, 167a, and 167b, thereby appropriately cooling according to the heat generation state of the electric motor 100 for underwater loading. Circuits 150 and 160 can be used. That is, the two pumps 157a, 157b, 167a, and 167b may adjust the circulation of the cooling fluid according to the calorific value of the stator 140.

Meanwhile, the first and second cooling circuits 160 may be connected to each other in the system connection valve 170. Although the first cooling circuit 150 and the second cooling circuit 160 are independent cooling circuits, respectively, the first cooling circuit 150 and the second cooling circuit 160 are connected to the system connection valve 170 to selectively select the first cooling circuit 150 according to the amount of heat generated by the stator 140. Alternatively, the second cooling circuit 160 may be used.

1 and 2, the first cooling channel 152 and the second cooling channel 162 may be formed in a zigzag shape. As the cooling flow paths 152 and 162 formed as described above are increased in contact with the outer circumferential surface of the stator 140, as a result, the cooling fluid flowing in the outer circumferential surface of the stator 140 increases. Thus, the stator 140 can be cooled effectively. In addition, since the cooling fluid of the first cooling passage 152 and the cooling fluid of the second cooling circuit 162 may flow in contact with each other, heat exchange may also occur between the cooling fluids.

In addition, the first and second cooling passages 162 may be formed to correspond to each other. In more detail, the first and second cooling passages 162 are preferably formed to flow in the same direction. When the flow direction of the cooling fluid is the same as described above, it is possible to reduce the time required for the stator 140 to cool, and heat exchange may occur between the cooling fluids flowing through the first and second cooling passages 152 and 162.

The first and second cooling circuits 160 supplying the cooling fluid to the first and second cooling passages 162 may be connected to the system connection valve 170. The cooling fluid is supplied to the first or second cooling passage 162 according to the heat generation state of the stator 140, but in some cases the first or the second cooling circuit 160 may be operated according to the operation of the first cooling circuit or the second cooling circuit 160. Cooling fluid may be supplied to the second cooling channel 162.

That is, in some cases, the first cooling circuit 150 or the second cooling circuit 160 may not operate. For example, when the first cooling circuit 150 is not operated due to the surrounding environment, a mistake of the operator, the cooling fluid does not flow in the first cooling passage 152. At this time, the cooling fluid flows through the second cooling passage 162 while the second cooling circuit 160 is operated, and thus the stator 140 generated by heat may be cooled.

Referring back to FIG. 3, the coolant cooled in the water-water exchangers 151 and 161 may include the first and second cooling channels 155 and 165 capable of cooling the stator 140 and the electric motor inverter unit 156. 166 may be connected to cool the first and second cooling channels 155 and 165 and the electric motor inverter units 156 and 166, respectively. In this case, the coolant including heat may be collected in the coolant tanks 154 and 164 to remove the gas (153 and 163). The degassed cooling water can be moved back to the water-water exchangers 151 and 161 by pumps 157 and 167 which are responsible for cooling water circulation, and again the first and second cooling channels 155 and 165 and the electric motor. Cooling of the inverter units 156 and 166 may be performed.

At this time, the first cooling circuit 150 and the second cooling circuit 160 may operate independently of any one of the first cooling circuit 150 or the second cooling circuit 160, but the system connection valve 170 In connection, the first cooling circuit 150 and the second cooling circuit 160 may both operate according to the heat generation state of the stator 140 to supply cooling fluid to the first and second cooling passages 162.

As such, the water-water exchangers 151 and 161 directly absorb the heat to the stator 140 that generates the most heat in the electric motor, thereby maximizing cooling of the electric motor 100. In addition, by adjusting the inverter units 156 and 166 of the pumps 157a, 157b, 167a, and 167b according to the degree of the heat source generated by the stator 140, the electric motor can be cooled with the smallest power.

In addition, by having two cooling systems that operate independently, it is easy to repair and maintain, it is possible to effectively cool the electric motor 100 in a relatively limited space, such as submarines such as submarines.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

1 is a perspective view showing an electric motor to which two independent cooling systems of an electric motor for submarines according to an embodiment of the present invention are applied.

FIG. 2 is an enlarged view of the cooling system of FIG. 1.

3 is a configuration diagram of an electric motor to which two independent cooling systems of the electric motor for submarines of the present invention are applied.

<Explanation of symbols for the main parts of the drawings>

100: electric motor 150 for submarines: first cooling circuit

152: first cooling passage 160: second cooling circuit

162: second cooling flow path 157a, 157b, 167a, 167b: cooling pump

Claims (6)

 In the two independent cooling system of the electric motor for submarines having a rotor and a stator spaced apart from the outer circumference of the rotor, A first cooling passage formed on an outer circumferential surface of the stator and flowing with a cooling fluid for cooling the stator; A second cooling passage formed side by side on the first cooling passage; A first cooling circuit supplying a cooling fluid to the first cooling passage; And A second cooling circuit which supplies a cooling fluid to the second cooling passage and operates independently of the first cooling circuit. The two independent cooling system of the electric motor for submarines, characterized in that the flow direction of the cooling fluid flowing through the first cooling channel is the same as the flow direction of the cooling fluid flowing through the second cooling channel. The method of claim 1, The first cooling circuit and the second cooling circuit include two pumps for circulating a cooling fluid to pass through the first cooling channel and the second cooling channel, respectively. Two independent cooling systems for electric motors for submersibles, characterized in that the less power consumption of the two pumps are used in the basic circulation of the cooling fluid, the two pumps are used for maximum cooling. The method of claim 2, Independent two cooling systems of the electric motor for submarines, characterized in that the circulation of the two pumps is controlled in accordance with the calorific value of the stator. The method according to any one of claims 1 to 3, And the first cooling circuit and the second cooling circuit are connected to each other by a system connection valve. The method of claim 4, wherein The two independent cooling system of the electric motor for submarines, characterized in that the first cooling passage and the second cooling passage is formed in a zigzag form. The method of claim 5, The two independent cooling system of the electric motor for submarines, characterized in that the first cooling passage and the second cooling passage formed in a form corresponding to each other.

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