TWI880772B - Motor for pump and pump housing structure connected to the motor - Google Patents

Abstract

This invention proposes a motor for use in a pump, which has a casing, a stator, a rotor, and an outer casing. The casing surrounds an inner chamber and has an axial direction, and has a first end and a second end opposite to each other, the first end has an open end and the second end is closed. The stator is disposed around the outer circumference of the casing along the circumferential direction. The rotor is disposed in the casing, and the rotor includes a rotating shaft and a sensing part. One end of the rotating shaft is rotatably disposed in the casing and extends along the axial direction; the sensing part is magnetic and is disposed around the rotating shaft. The outer casing surrounds an outer chamber, and the casing, the stator, and the rotor are disposed in the outer chamber, and the outer chamber and the inner chamber are not connected to each other. The casing separates the stator and the rotor, allowing the heat dissipation fluid to flow into the inner chamber of the casing, thereby covering the rotor and taking away the heat.

Description

Motor for pump and pump housing structure connected to the motor

This invention relates to a motor, and in particular to an induction motor that can be used for a pump.

A motor is a very common drive device that converts energy such as electricity into mechanical energy and outputs it for use. Motors that use electricity are called electric motors, also called motors. Traditionally, an electric motor includes a stator and a rotor, with a variable magnetic field and a fixed magnetic field respectively set on the stator and the rotor. By changing the magnetic poles of the variable magnetic field with electric current, the rotor can be driven to rotate. An induction motor is also a type of electric motor, with a variable magnetic field set on the stator and a fixed magnetic field set on the rotor.

Induction motors used in pumps must overcome fluid resistance, so the stator and rotor tend to generate a lot of heat during operation. Generally speaking, induction motors use a sleeve-shaped stator to surround the rotor, so the heat energy of the rotor is difficult to dissipate, which can easily cause excessive temperatures over time, leading to damage to the rotor or output shaft. In addition, pumps used for fluids will inevitably accumulate water inside the motor, which may also cause damage to the motor.

Therefore, it is necessary to improve the motor used in the pump.

The main purpose of this invention is to propose a motor for use in a pump, especially an induction motor, which can allow its rotor to be covered by a heat dissipation fluid to dissipate heat and also help the stator dissipate heat without affecting the operation of the stator.

To achieve the above-mentioned purpose, the motor for use in a pump proposed in the invention comprises: a housing, which surrounds an inner chamber, the housing has an axial direction and has a first end and a second end opposite to each other in the axial direction, the first end has an end opening and the second end is closed; a stator, which is arranged around the outer peripheral surface of the housing along the circumferential direction of the housing; a rotor, which is arranged in the housing; the rotor comprises: a rotating shaft, one end of which is rotatably arranged in the housing and the other end of which extends along the axial direction of the housing; and a sensing part, which has magnetism, The sensing part is arranged around the rotating shaft; and an outer shell, which is arranged around an outer chamber, and the housing, the stator, and the rotor are arranged in the outer chamber, and the outer chamber and the inner chamber are not connected to each other; wherein the sensing part further includes a setting sleeve, which is arranged on the rotating shaft and extends along the length direction of the rotating shaft; at least one magnetic member, which is arranged on the outer peripheral surface of the setting sleeve along the circumferential direction of the setting sleeve; and a covering shell, which is connected to the setting sleeve and seals the at least one magnetic member, and there is a gap between the covering shell and the inner peripheral surface of the housing.

To achieve the above-mentioned purpose, the invention proposes a pump housing structure, which can be interconnected with the motor used for the pump as described above, and the pump housing structure includes: a setting plate, which has: a setting surface, the first end of the housing is sealed and connected to the setting surface; and at least one through hole, which is formed through the setting plate, and the at least one through hole is interconnected with the inner chamber through the end opening of the first end.

Therefore, the advantage of the motor for pump use of this invention is that the stator and rotor are separated by a casing, so that the heat dissipation fluid can flow into the inner chamber of the casing, thereby covering the rotor and taking away the heat, and the fluid will not enter the position where the stator is located, so it will not affect the operation of the stator, so it can effectively dissipate heat. When this invention is not in use, the fluid can leave the inner chamber through the end opening without accumulation.

In addition, the advantage of the pump shell structure proposed in this invention is that, with the pump shell structure of this invention, the water pumped by the pump can be directly used to pass through the through hole of the setting plate and directly enter the inner chamber to take away the heat. There is no need to set up an additional working fluid source, which can reduce the overall weight and volume of the pump.

The motor for use in a pump as described above, wherein the material of the setting sleeve includes stainless steel; and the material of the covering shell includes stainless steel.

As described above, the motor for pumping, wherein the outer shell further has a side opening formed through the outer shell and connected to the outer chamber; and a circuit box connected to the outer peripheral surface of the outer shell and located at the position of the side opening, and the circuit box has an internal space, and the internal space is connected to the side opening.

As described above, the motor for use in a pump, wherein the housing further has a bearing portion located in the inner chamber, the bearing portion is formed at the second end portion and protrudes toward the first end portion, and one end of the rotating shaft is rotatably disposed on the bearing portion.

A motor for use in a pump as described above, wherein the material of the housing comprises stainless steel.

The motor for use in a pump as described above further comprises a working fluid located in the inner chamber and covering the rotor, and the working fluid can enter and exit the housing through the end opening of the first end.

As described above, the pump housing structure, wherein the outer housing is sealed and connected to the mounting plate, thereby forming a closed space between the outer housing, the container, and the mounting plate.

10: Container

11: Inner chamber

12: First end

121: Open end

13: Second end

14: Bearing part

20: Stator

30: Rotor

31: Rotating axis

32: Sensing Department

321: Set up the set

322: Magnetic parts

323: Encapsulated Shell

40: Shell

41: Outer chamber

42: Side opening

43:Circuit box

431:Inner space

50: Workflow

60: Setting board

61: Setting surface

62:Through hole

A1: Axial direction

Figure 1 is a three-dimensional schematic diagram of this creation.

Figure 2 is a three-dimensional decomposition diagram of this creation.

Figure 3 is a top view of this work.

Figure 4 is a schematic cross-sectional view of Figure 3 along the A-A cutting line.

Figure 5 is a partial enlarged view of Figure 4, which shows that there is a gap between the stator and the housing.

Figure 6 is a side-section diagram of this creation.

First, please refer to Figures 1 and 2. This invention proposes a motor for use in a pump, which has a housing 10, a stator 20, a rotor 30, and an outer shell 40.

Please refer to Figures 3 to 6 together. The housing 10 surrounds an inner chamber 11. The housing 10 has an axial direction A1, and has a first end 12 and a second end 13 opposite to each other in the axial direction A1. The housing 10 in this embodiment is generally cylindrical, but not limited to this. The first end 12 has an end opening 121, and the second end 13 is closed. In this embodiment, the material of the housing 10 includes stainless steel, but not limited to this.

The housing 10 has a bearing portion 14, which is located in the inner chamber 11, formed at the second end 13 and protruding toward the first end 12. The bearing portion 14 in this embodiment is a ring wall structure, one end of the bearing portion 14 is connected to the second end 13, and the other end extends toward the first end 12, but the form of the bearing portion 14 is not limited to this, and the housing 10 may not have the bearing portion 14.

The stator 20 is disposed around the outer surface of the housing 10 along the circumferential direction of the housing 10. The stator 20 in this embodiment is a plurality of coils disposed around the outer surface of the housing 10. However, the form of the stator 20 can be adjusted according to demand, as long as it is disposed outside the outer surface of the housing 10, or it may not touch the housing 10.

The rotor 30 is rotatably disposed in the housing 10, and there is a gap between the rotor 30 and the inner circumference of the housing 10. Specifically, the rotor 30 includes a shaft 31 and a sensing portion 32. The shaft 31 extends along the axial direction A1 of the housing 10, one end of which is rotatably disposed on the bearing portion 14 of the housing 10, and the bearing portion 14 is used to support the rotation of the rotor 30, and the other end passes through the end opening 121 of the first end portion 12. The sensing portion 32 is magnetic, and the sensing portion 32 is disposed around the shaft 31. Specifically, the sensing part 32 is sleeved on the rotating shaft 31 and is located in the inner chamber 11, and is spaced apart from the inner circumference of the housing 10, thereby being driven by the stator 20 to drive the rotating shaft 31 to rotate.

The sensing part 32 includes a setting sleeve 321, at least one magnetic member 322, and a coating shell 323. The setting sleeve 321 is sleeved on the rotating shaft 31 and extends along the length direction of the rotating shaft 31. In this embodiment, the material of the setting sleeve 321 and the coating shell 323 includes stainless steel, and the number of the magnetic members 322 is plural, but not limited thereto. The magnetic members 322 are arranged on the outer circumferential surface of the setting sleeve 321 along the circumferential direction of the setting sleeve 321. The magnetic members 322 can be permanent magnets, and each magnetic member 322 is attached to the outer circumferential surface of the setting sleeve 321 in accordance with the shape of the setting sleeve 321. The coating shell 323 is coated on the setting sleeve 321 and seals and covers the magnetic members 322, so that the coating shell 323 can isolate the magnetic members 322 from the inner chamber 11. There is a gap between the covering shell 323 and the inner circumference of the container 10.

The outer shell 40 surrounds an outer chamber 41, and the housing 10, the stator 20, and the rotor 30 are arranged in the outer chamber 41. The outer chamber 41 and the inner chamber 11 are not connected to each other, so that the stator 20 and the rotor 30 are separated in different spaces. In this embodiment, the outer chamber 41 and the inner chamber 11 are isolated by sealingly connecting the outer shell 40 and the housing 10 to a pump shell structure, but it is not limited to this. For example, the outer shell 40 can also surround and seal the outer surface of the housing 10, or only the end opening 121 of the housing 10 is sealed and connected to the opening of a water tank (not shown in the figure), which can achieve the effect of completely separating the outer chamber 41 and the inner chamber 11.

In this embodiment, the outer shell 40 further has a side opening 42 and a circuit box 43. The side opening 42 is formed through the outer shell 40 and connected to the outer chamber 41; the circuit box 43 is connected to the outer peripheral surface of the outer shell 40 and is located at the position of the side opening 42, and the circuit box 43 has an internal space 431, and the internal space 431 and the side opening 42 are interconnected. The circuit box 43 is used to set the control circuit (not shown in the figure). The user can set the control circuit in the internal space 431, and the control circuit enters the outer chamber 41 through the side opening 42 and is interconnected with the stator 20, but it is not limited to this. The outer shell 40 may not have the side opening 42 and the circuit box 43, and the control circuit may also be directly set in the outer chamber 41.

This embodiment may further include a working fluid 50, which is located in the inner chamber 11 and covers the rotor 30. The working fluid 50 can enter and exit the housing 10 through the end opening 121 of the first end 12, so that the working fluid 50 takes away the heat generated by the operation of the rotor 30, thereby improving the efficiency of heat dissipation. For example, the working fluid 50 can be liquid water, but it can also be other liquids, or it can also be flowing air.

The first end 12 of the housing 10 can be connected to a working fluid source (not shown in the figure), for example, the first end 12 can be sealed and connected to a water tank, so that the water in the water tank flows into the inner chamber 11. Therefore, the present invention can allow the working fluid 50 to enter the interior of the housing 10 through the end opening 121 of the first end 12 of the housing 10, thereby covering the rotor 30 and taking away the generated heat, while the working fluid 50 will not enter the outer chamber 41 and will not affect the operation of the stator 20. In addition, the sensing part 32 of the rotor 30 of the invention seals and covers the magnetic part 322 with a covering shell 323, which can prevent the magnetic part 322 from contacting the working fluid 50. The covering shell 323, the container 10, and the sleeve 321 can also be made of stainless steel materials to reduce the possibility of rust or damage. Therefore, the rotor 30 of the invention can be immersed in water, and the water can assist in heat dissipation.

Please refer to Figure 6. The invention proposes a pump housing structure that can be interconnected with the motor used for the pump of the invention. The pump housing structure includes a setting plate 60, the setting plate 60 has a setting surface 61, and the first end 12 of the housing 10 is sealed and connected to the setting surface 61. The setting plate 60 has at least one through hole 62, which is formed through the setting plate 60, and the through hole 62 is interconnected with the inner chamber 11 through the end opening 121 of the first end 12. The invention can also seal the outer shell 40 to the setting plate 60, thereby forming a closed space between the outer shell 40, the housing 10, and the setting plate 60.

Since the rotor 30 of the invention can be immersed in water, and the stator 20 is arranged in the closed space formed by the outer shell 40, the housing 10, and the setting plate 60, in combination with the pump shell structure of the invention, when the pump is operated and water (or other fluids) are pumped in, the water can enter the inner chamber 11 through the through hole 62 of the setting plate 60, taking away the heat generated by the rotor 30, without having to connect a working fluid or a heat dissipation module for heat dissipation, thereby achieving the beneficial effect of reducing the overall volume of the pump.

In summary, the rotor 30 of the motor for use in the pump of the invention can be immersed in liquid, and the stator 20 and the rotor 30 are separated by the housing 10, so that the heat dissipation fluid can flow into the inner chamber 11 of the housing 10, thereby covering the rotor 30 and taking away the heat, and the fluid will not enter the position where the stator 20 is located, so it will not affect the operation of the stator 20, and can effectively dissipate heat for the stator 20 and the rotor 30. In addition, since the first end 12 of the housing 10 has an end opening 121, when the invention is not in use, water or other fluids can leave the inner chamber 11 through the end opening 121 and will not accumulate in the inner chamber 11.

In addition, in conjunction with the pump housing structure of the invention, the motor used for the pump of the invention is connected to the setting plate 60, and the water or other fluid pumped by the pump can be directly used to pass through the through hole 62 of the setting plate 60 and directly enter the inner chamber 11 to take away the heat generated by the rotor 30. In this way, there is no need to set up an additional working fluid source or heat dissipation module, which can reduce the overall weight and volume of the pump and reduce the manufacturing cost.

10: Container

11: Inner chamber

12: First end

121: Open end

13: Second end

14: Bearing part

20: Stator

30: Rotor

31: Rotating axis

32: Sensing Department

321: Set up the set

322: Magnetic parts

323: Encapsulated Shell

40: Shell

41: Outer chamber

42: Side opening

43:Circuit box

431:Inner space

50: Workflow

60: Setting board

61: Setting surface

62:Through hole

A1: Axial direction

Claims (8)

A motor for use in a pump, comprising: a housing, which surrounds an inner chamber, the housing having an axial direction and having a first end and a second end opposite to each other in the axial direction, the first end having an end opening and the second end being closed; a stator, which is disposed around the outer circumference of the housing along the circumferential direction of the housing; a rotor, which is disposed in the housing; the rotor comprises: a shaft, one end of which is rotatably disposed in the housing and the other end of which extends along the axial direction of the housing; and a sensing portion, which has magnetism and is disposed around the shaft; and An outer shell, which surrounds an outer chamber, and the housing, the stator, and the rotor are arranged in the outer chamber, and the outer chamber is not connected to the inner chamber; Wherein, the sensing part further includes: A setting sleeve, which is set on the shaft and extends along the length direction of the shaft; At least one magnetic member, the at least one magnetic member is set on the outer peripheral surface of the setting sleeve along the circumferential direction of the setting sleeve; and A covering shell, which is connected to the setting sleeve and seals the at least one magnetic member, and there is a gap between the covering shell and the inner peripheral surface of the housing. A motor for use in a pump as described in claim 1, wherein: the material of the setting sleeve includes stainless steel; and the material of the covering shell includes stainless steel. A motor for use in a pump as described in claim 1 or 2, wherein the outer casing further comprises: a side opening formed through the outer casing and connected to the outer chamber; and a circuit box connected to the outer peripheral surface of the outer casing and located at the position of the side opening, and the circuit box has an internal space, and the internal space is connected to the side opening. A motor for use in a pump as described in claim 1 or 2, wherein the housing further comprises: a bearing portion located in the inner chamber, the bearing portion being formed at the second end portion and protruding toward the first end portion, and one end of the rotating shaft being rotatably disposed on the bearing portion. A motor for use in a pump as described in claim 1 or 2, wherein: The material of the housing comprises stainless steel. The motor for use in a pump as described in claim 1 or 2 further comprises: A working fluid located in the inner chamber and covering the rotor, the working fluid being able to enter and exit the housing through the end opening of the first end. A pump housing structure, which can be interconnected with a motor for use in a pump as described in any one of claims 1 to 6, and the pump housing structure comprises: a setting plate, which has: a setting surface, to which the first end of the housing is sealed and connected; and at least one through hole, which is formed through the setting plate, and the at least one through hole is interconnected with the inner chamber through the end opening of the first end. A pump housing structure as described in claim 7, wherein the outer housing is sealingly connected to the setting plate, thereby forming a closed space between the outer housing, the container, and the setting plate.