A fully water-cooled motor

Abstract

The present invention discloses a fully water-cooled motor, which includes a rotating shaft (1), bearings (2), end covers (3), a machine base (5), stator coils (6), a stator core (8), and a rotor core (11). The stator core (8) is provided with stator ventilation openings (9) penetrating through both ends, and the rotor core (11) is provided with rotor ventilation openings (10) penetrating through both ends. One end of the rotating shaft (1) is sleeved with an inner fan (4) for extracting air in the rotor ventilation opening (10), and a water-cooled radiator (12) is installed on the end cover (3) at the other end of the rotating shaft (1). The present invention has the characteristics of simple structure, good processability, suitability for mass production, safety and reliability.

Description

Technical Field

[0001] The present invention relates to the field of motor cooling, and particularly to a fully water-cooled motor. Background Art

[0002] Existing motors generally include a rotating shaft, i.e., the motor main shaft, and also have bearings, stator coils, a stator core, and a rotor core. They are protected externally by end covers and a motor frame. When the motor is running, a large amount of heat is generated. If the heat is not dissipated in time, it will cause the motor temperature to be too high or even burned out. To control the motor temperature, currently, the motor cooling usually adopts the shell water-cooling and water internal-cooling methods. The shell water-cooling cools the motor shell, with mature technology and good cooling effect. The water internal-cooling method cools the motor coils, with excellent cooling effect, which can greatly improve the limit capacity of the motor. However, the current water internal-cooling method has a very complex structure and high technical requirements. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a fully water-cooled motor with a simple structure, good processability, and suitable for mass production.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A fully water-cooled motor includes a rotating shaft, bearings, end covers, a motor frame, stator coils, a stator core, and a rotor core. The stator core is provided with stator ventilation openings penetrating through both ends, and the rotor core is provided with rotor ventilation openings penetrating through both ends. An internal fan for extracting air in the rotor ventilation opening is sleeved on one end of the rotating shaft, and a water-cooled radiator is installed on the end cover at the other end of the rotating shaft.

[0006] Further, cooling water pipes are arranged in the slots of the stator core. Both ends of the cooling water pipes are communicated with the outside, and an inlet A and an outlet A are respectively arranged at both ends. The water-cooled radiator is also respectively provided with an inlet B and an outlet B.

[0007] Further, the inlet A and the inlet B are communicated with each other, the outlet A and the outlet B are communicated with each other, and both the outlet A and the outlet B are communicated with the inlet A.

[0008] Further, the cooling water pipes are integrally formed and are closely attached to the stator coils.

[0009] Further, an insulating sleeve is wrapped outside the cooling water pipes.

[0010] Further, the cooling water pipes are square copper pipes or circular copper pipes.

[0011] Further, the radius of the internal fan is smaller than the distance from the stator coil to the axis line of the rotating shaft.

[0012] The present invention has the following advantages:

[0013] 1. The motor structure adopting this cooling method is simple and has good processability, being suitable for mass production;

[0014] 2. Since the motor adopts a fully water-cooled structure, the weight and volume of the motor can be significantly reduced;

[0015] 3. Since the motor omits the external ventilation structure, the protection level of the motor can be significantly improved, preventing the invasion of external rainwater and dust, greatly increasing the service life of the motor, and at the same time enhancing the ability of the motor to operate in the field, being particularly suitable for oilfield and shale gas development;

[0016] 4. After the motor adopts a fully enclosed structure, the motor noise can be significantly reduced, improving the comfort of on-site personnel and surrounding residents;

[0017] 5. For the motor adopting this cooling method, the coolant of the motor is separated from the high-voltage electricity of the coil, with high safety. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] In the figure: 1 - rotating shaft, 2 - bearing, 3 - end cover, 4 - internal fan, 5 - frame, 6 - stator coil, 7 - cooling water pipe, 701 - water inlet A, 702 - water outlet A, 8 - stator core, 9 - stator ventilation opening, 10 - rotor ventilation opening, 11 - rotor core, 12 - water-cooled radiator, 1201 - water inlet B, 1202 - water outlet B. Detailed Embodiment

[0020] The present invention will be further described below in conjunction with the drawings, but the protection scope of the present invention is not limited to the following.

[0021] As Figure 1 shown, a fully water-cooled motor includes a rotating shaft 1, a bearing 2, an end cover 3, a frame 5, a stator coil 6, a stator core 8 and a rotor core 11. The stator core 8 is provided with a stator ventilation opening 9 penetrating through both ends, and the rotor core 11 is provided with a rotor ventilation opening 10 penetrating through both ends. One end of the rotating shaft 1 is sleeved with an internal fan 4 for extracting the air in the rotor ventilation opening 10. At the other end of the rotating shaft 1, a water-cooled radiator 12 is installed on the end cover 3, and the installation position should be such that the exhaust port of the water-cooled radiator 12 is close to the rotor ventilation opening 10 as much as possible, facilitating the cooled air to enter the rotor ventilation opening 10.

[0022] Cooling water pipes 7 are arranged in the slots of the stator core 8. Both ends of the cooling water pipes 7 are communicated with the outside, and a water inlet A 701 and a water outlet A 702 are respectively arranged at both ends. The water-cooled radiator 12 is also respectively provided with a water inlet B 1201 and a water outlet B 1202.

[0023] The water inlet A701 and the water inlet B1201 are interconnected, the water outlet A702 and the water outlet B1202 are interconnected, and both the water outlet A702 and the water outlet B1202 are connected to the water inlet A701, so that the water coming out of the two water outlets returns to the water inlet, achieving the purpose of reuse and saving energy.

[0024] Preferably, the cooling water pipe 7 is integrally formed, and there is no water pipe joint inside the motor housing, so the motor has high stability and maintainability; and the cooling water pipe 7 is closely attached to the stator coil 6, directly cooling the stator coil 6 and the stator core 8, greatly improving the motor cooling effect and the motor limit capacity.

[0025] The cooling water pipe 7 is wrapped with an insulating sleeve, so that the cooling water pipe 7 and the stator coil 6 are insulated independently, preventing the high-voltage current in the stator coil 6 from flowing into the cooling system and improving the safety.

[0026] The cooling water pipe 7 is a square copper pipe or a round copper pipe. Preferably, in this embodiment, a square copper pipe is selected.

[0027] The radius of the inner fan 4 is smaller than the distance from the stator coil 6 to the axis of the rotating shaft 1. Since the inner fan 4 is an air suction fan, such a setting can ensure that only the air at the rotor ventilation opening 10 is extracted.

[0028] The working process of the present invention is as follows: During the working process of the present invention, the heat dissipation is composed of two paths: air circulation and cooling water circulation. The air circulation path is: the inner fan 4 rotates synchronously with the rotating shaft 1, generating air volume to extract the air in the rotor ventilation opening 10 to take away the heat generated by the rotor. The air takes away the heat of the stator core 8 through the stator ventilation opening 9, and finally the air enters the water-cooled radiator 12. The cooled air is discharged from the water-cooled radiator 12 and then enters the rotor ventilation opening 10, so as to circulate and dissipate heat.

[0029] The cooling water circulation path is: a part of the cooling water enters the cooling water pipe 7 through the water inlet A701, directly taking away the heat generated by the stator coil 6 and the stator core 8, and then returns to the water inlet A701 through the water outlet A702; another part of the cooling water enters the water-cooled radiator 12 through the water inlet B1201 to take away the heat of the internal circulating air, and then returns to the water inlet A701 through the water outlet B1202, so as to circulate and dissipate heat.

Claims

1. A fully water-cooled motor, comprising a rotating shaft (1), bearings (2), end covers (3), a frame (5), stator coils (6), a stator core (8), and a rotor core (11), characterized in that: The stator core (8) is provided with stator ventilation openings (9) penetrating both ends, the rotor core (11) is provided with rotor ventilation openings (10) penetrating both ends, one end of the rotating shaft (1) is sleeved with an internal fan (4) for extracting air in the rotor ventilation opening (10), and at the other end of the rotating shaft (1), a water-cooled radiator (12) is installed on the end cover (3); cooling water pipes (7) are arranged in the slots of the stator core (8), both ends of the cooling water pipes (7) are communicated with the outside, and a water inlet A (701) and a water outlet A (702) are respectively arranged at both ends. The water-cooled radiator (12) is also respectively provided with a water inlet B (1201) and a water outlet B (1202); the radius of the internal fan (4) is smaller than the distance from the stator coil (6) to the axis of the rotating shaft (1); The water inlet A (701) and the water inlet B (1201) are communicated with each other, the water outlet A (702) and the water outlet B (1202) are communicated with each other, and both the water outlet A (702) and the water outlet B (1202) are communicated with the water inlet A (701).

2. The all-water-cooled motor according to claim 1, characterized in that: The cooling water pipes (7) are integrally formed and are in close fit with the stator coils (6).

3. The full-water-cooled motor according to claim 2, characterized in that: An insulating sleeve is wrapped outside the cooling water pipes (7).

4. The all-water-cooled motor according to claim 2, characterized in that: The cooling water pipes (7) are square copper pipes or circular copper pipes.

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