CN208236678U - A kind of automobile brshless DC motor water pump - Google Patents

Abstract

The utility model mainly discloses a brushless DC motor water pump for automobiles, and its technical scheme includes a motor casing, a stator assembly, a stator sealing end cover, a rotor assembly, a shaft and a pump body, and the stator sealing end cover is connected with the motor casing , the stator assembly is connected inside the casing, the rotor assembly is connected to the shaft, the pump body includes a pump end cover, the pump end cover is connected to the motor casing, and a water inlet is provided on one side of the pump end cover, The other side of the end cover of the pump is provided with a water outlet, the stator assembly is isolated from water through the stator sealing end cover, and the rotor assembly is soaked in water and rotates together with the impeller. This can ensure that the energized part of the motor, that is, the motor winding and the control circuit board, will not be damaged by water erosion, thereby greatly improving the service life of the water pump, and because the brushless motor is controlled by an electronic circuit, it does not have a brush. The carbon brushes and commutators of the motor are worn out, so the life of the entire water pump can be greatly extended.

Description

A brushless DC motor water pump for automobiles

technical field

The utility model relates to the technical field of water pumps, in particular to a brushless DC motor water pump for automobiles.

Background technique

The automobile water pump is an important part that pumps the hot water in the engine into the water tank with the radiator, alternately converts the hot water and cold water, and performs an infinite cycle to cool the engine rapidly. As long as the engine is running, the water pump is also running. The water pumps used in cars earlier were all mechanical water pumps. It was driven by the engine through a belt to drive the rotor of the water pump to make the water pump run. Because the belt is easy to wear or fall off, and the rotor of the water pump runs in the direction of belt tension for a long time, the seals and bearings used in the water pump are easily worn, resulting in water leakage and shortening the life of the water pump. Later, the water pump was driven by a brushed DC motor to replace the mechanical water pump. Because in the brushed DC motor, there is mutual friction between a carbon brush and the commutator, which makes the carbon brush and the commutator wear out faster, so the life of the brushed DC motor is also shorter.

Utility model content

The purpose of the utility model is to solve the shortcomings in the prior art, and propose a brushless DC motor water pump for automobiles, which has the advantages of simple structure, waterproof and long life.

In order to achieve the above object, the utility model is realized through the following technical solutions: a brushless DC motor water pump for automobiles, including a motor casing, a stator assembly, a stator sealing end cover, a rotor assembly, a shaft and a pump body, the stator sealing end The cover is connected to the motor casing, the stator assembly is connected to the inside of the casing, the rotor assembly is connected to the shaft, the pump body includes a pump end cover, the pump end cover is connected to the motor casing, and one side of the pump end cover A water inlet is provided, and a water outlet is provided on the other side of the end cover of the pump.

It is further set that: the stator assembly includes a stator core, insulating sheets at both ends of the iron core, a motor winding and a control circuit board, the stator core is fixed on the insulating sheet, and the motor winding is a three-phase star winding wound on On the stator core, its three leads are connected with the control circuit board.

It is further provided that: the rotor assembly includes an injection molded part, a bearing, an impeller and a magnetic steel, the inner circle of the injection molded part is connected to the bearing, the outer circle of the injection molded part is connected to the magnetic steel, and the end of the injection molded part is connected to the impeller.

It is further set as: a sealing ring is provided between the pump end cover and the motor casing, the pump end cover is fixedly connected with the motor casing, and the sealing effect is good.

It is further set that: the injection molded part is welded with the impeller, and the connection is stable.

The utility model has beneficial effects as follows:

After the brushless DC motor water pump is energized, the motor winding is controlled by the control circuit board, and the power is energized in a certain order, so that a corresponding magnetic field is generated around the motor winding, and the magnetic field interacts with the magnetic field generated by the magnetic steel to make the entire rotor assembly rotate. , so as to drive the impeller to rotate, and the brushless DC motor water pump starts to run. When the brushless DC motor water pump is running, the stator sealing end cover is connected to the motor casing, the stator assembly is located inside the motor casing, the stator assembly is isolated from water through the stator sealing end cover, and the rotor assembly is immersed in water together with the impeller rotate. This can ensure that the energized part of the motor, that is, the motor winding and the control circuit board, will not be damaged by water erosion, thereby greatly improving the service life of the water pump, and because the brushless motor is controlled by an electronic circuit, it does not have a brush. The carbon brushes and commutators of the motor are worn out, so the life of the entire water pump can be greatly extended.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Reference signs: 1. Motor casing; 2. Stator assembly; 3. Stator sealing end cover; 4. Rotor assembly; 41. Control circuit board; 42. Injection molded part; 43. Bearing; 44. Impeller; 45. Magnetic steel; 5. Pump body; 51. Pump end cover; 52. Water inlet; 53. Water outlet; 6. Stator core; 7. Insulation sheet; 8. Motor winding; 9. Shaft.

Detailed ways

In conjunction with the accompanying drawings, the preferred embodiments of the utility model are further described in detail.

A brushless DC motor water pump for automobiles as shown in Figure 1, comprising a motor housing, a stator assembly, a stator sealing end cover, a rotor assembly, a shaft and a pump body, the stator sealing end cover is connected with the motor housing, and the stator The assembly is connected inside the housing, the rotor assembly is connected to the shaft, the pump body includes a pump end cover, the pump end cover is connected to the motor casing, a water inlet is provided on one side of the pump end cover, and the pump end The other side of the cover is provided with a water outlet.

The stator assembly includes a stator core, insulating sheets at both ends of the iron core, a motor winding and a control circuit board, the stator core is fixed on the insulating sheet, and the motor winding is a three-phase star winding wound on the stator core , and its three leads are connected to the control circuit board.

The rotor assembly includes an injection molded part, a bearing, an impeller and a magnetic steel, the inner circle of the injection molded part is connected to the bearing, the outer circle of the injection molded part is connected to the magnetic steel, the end of the injection molded part is connected to the impeller, and the injection molded part is welded to the impeller , the connection is firm. A sealing ring is provided between the pump end cover and the motor casing, and the pump end cover is fixedly connected with the motor casing, and the sealing effect is good.

In actual work, the brushless DC motor water pump is energized by an external power supply, the control circuit board controls the motor windings, and energizes in a certain order, so that a corresponding magnetic field is generated around the motor windings, and the magnetic field interacts with the magnetic field generated by the magnetic steel. It will rotate, and the injection molded part will rotate, which will drive the impeller to rotate at the same time, and the brushless DC motor water pump will start to run. When the brushless DC motor water pump is running, the stator sealing end cover is connected to the motor casing, the stator assembly is located inside the motor casing, the stator assembly is isolated from water through the stator sealing end cover, and the rotor assembly is immersed in water together with the impeller rotate. This can ensure that the energized part of the motor, that is, the motor winding and the control circuit board, will not be damaged by water erosion, thereby greatly improving the service life of the water pump, and because the brushless motor is controlled by an electronic circuit, it does not have a brush. The carbon brushes and commutators of the motor are worn out, so the life of the entire water pump can be greatly extended.

The above-mentioned embodiments are only used to explain the inventive concept of the present utility model, but not to limit the protection of the utility model rights. Any insubstantial changes made to the utility model by using this concept should fall within the protection scope of the utility model.

Claims (5)

1. A brushless DC motor water pump for automobiles, characterized in that: it comprises a motor casing (1), a stator assembly (2), a stator sealing end cover (3), a rotor assembly (4), an axle (9) and a pump body (5), the stator sealing end cover (3) is connected to the motor casing (1), the stator assembly (2) is connected to the inside of the casing, the rotor assembly (4) is connected to the shaft (9), the The pump body (5) includes a pump end cover (51), the pump end cover (51) is connected with the motor casing (1), and a water inlet (52) is provided on one side of the pump end cover (51). The other side of the end cover (51) is provided with a water outlet (53). 2. A brushless DC motor water pump for automobiles according to claim 1, characterized in that: the stator assembly (2) comprises a stator core (6), insulating sheets (7) at both ends of the core, motor windings (8) and the control circuit board (41), the stator core (6) is fixed on the insulating sheet (7), the motor winding (8) is a three-phase star winding and is wound on the stator core, which The three lead ends are connected with the control circuit board (41). 3. A brushless DC motor water pump for automobiles according to claim 1, characterized in that: the rotor assembly (4) includes injection molded parts (42), bearings (43), impellers (44) and magnetic steel ( 45), the inner circle of the injection molded part (42) is connected to the bearing (43), the outer circle of the injection molded part (42) is connected to the magnetic steel (45), and the end of the injection molded part (42) is connected to the impeller (44). 4. A brushless DC motor water pump for automobiles according to claim 1, characterized in that: a sealing ring is provided between the pump end cover (51) and the motor housing (1), and the pump end cover ( 51) is fixedly connected with the motor casing (1). 5. A brushless DC motor water pump for automobiles according to claim 3, characterized in that: the injection molded part (42) is welded to the impeller (44).