Canned magnetic pump for improved heat dissipation

Abstract

A canned magnetic pump capable of improving heat dissipation effect comprises a base, a positioning base, a motor unit and a pump front cover, wherein the base comprises a first end face, a second end face and an inner ring face, the positioning base comprises an inner peripheral face, an outer peripheral face, a plurality of recessed grooves recessed from the outer peripheral face toward the inner peripheral face and a plurality of first heat dissipation fins, a gap is generated between the outer peripheral face and the inner ring face, and the first heat dissipation fins are generated between two adjacent recessed grooves, the motor unit comprises a housing, a stator, a rotor and an impeller, the pump front cover is mounted on the first end face of the base and is covered on the outside of the impeller. By using the first heat dissipation fins of the positioning base and the arrangement of the gap, a better heat dissipation purpose can be achieved.

Description

Technical Field

[0001] The invention relates to a canned magnetic pump, in particular to a canned magnetic pump capable of improving heat dissipation effect. Background Art

[0002] There is a canned magnetic pump (patent case with certificate number TW M577069 in Taiwan, China), which includes a base, a positioning seat, a motor unit, a pump front cover and a heat dissipation cover. The base is made of plastic material and has a main disk and a side cover. The positioning seat is made of metal material and is hollow and cylindrical and is nested and installed in a combination hole of the main disk in a non-rotatable manner. The motor unit includes a shell installed on the base, a stator sleeved between the shell and the base and the positioning seat, a rotor installed inside the shell, and an impeller connected to the rotor. The pump front cover is installed on the base and covers the outside of the impeller. The heat dissipation cover is installed on the side cover of the base, and the positioning seat and the motor unit are positioned relative to the base along an axis.

[0003] Although the positioning seat is made of metal material and can withstand temperature rise and has good structural strength, the heat energy generated by the stator is not easily transferred to the heat dissipation cover because the inner annular surface of the base is in close contact with the outer peripheral surface of the positioning seat. Summary of the invention

[0004] The object of the present invention is to provide a canned magnetic pump which can solve the existing deficiencies and improve the heat dissipation effect.

[0005] The canned magnetic pump capable of improving heat dissipation effect of the present invention comprises a base, a positioning seat, a motor unit and a pump front cover, wherein the base is made of a plastic material and is hollow cylindrical, and comprises a first end face, a second end face opposite to the first end face along an axis, and an inner annular surface connected to the first end face and the second end face and surrounding the axis and defining a receiving hole, the positioning seat is made of an aluminum alloy material and is hollow cylindrical, and is installed in the receiving hole of the base, and comprises an inner circumferential surface surrounding the axis and defining an inner hole, an inner circumferential surface opposite to the inner circumferential surface and relative to the inner circumferential surface, and a second circumferential surface opposite to the inner circumferential surface and relative to the inner circumferential surface. On the outer circumferential surface of the inner ring surface, a plurality of recessed grooves are formed from the outer circumferential surface toward the inner circumferential surface, and a plurality of first heat dissipation fins. At least one gap is formed between the outer circumferential surface and the inner ring surface, and the first heat dissipation fins are formed between two adjacent recessed grooves. The motor unit includes a shell mounted on the base, a stator sleeved between the shell and the base and the positioning seat, a rotor mounted inside the shell, and an impeller connected to the rotor. The pump front cover is mounted on the first end surface of the base and is covered on the outside of the impeller.

[0006] The canned magnetic pump capable of improving heat dissipation of the present invention further comprises a heat dissipation cover installed on the second end face of the base, the heat dissipation cover is made of aluminum alloy and comprises an inner side face, an outer side face opposite to the inner side face along the axis, and a plurality of second heat dissipation fins protruding from the outer side face, and the inner side face abuts against the positioning seat.

[0007] The canned magnetic pump capable of improving heat dissipation effect of the present invention is characterized in that the inner annular surface of the base is stepped and has a first straight section intersecting and connected to the first end face, a first abutting portion intersecting and connected to the first straight section and substantially parallel to the first end face, a second straight section intersecting and connected to the first abutting portion and substantially parallel to the axis, a second abutting portion intersecting and connected to the second straight section and substantially parallel to the first end face, a third straight section intersecting and connected to the second abutting portion and substantially parallel to the axis, a third abutting portion intersecting and connected to the third straight section and substantially parallel to the first end face, and a fourth straight section intersecting and connected to the third abutting portion, the second end face intersecting and connected to the fourth straight section, the gap is located between the outer peripheral surface and the third straight section, the stator abuts against the first abutting portion and the inner side surface of the heat dissipation cover, and the positioning seat abuts against the second abutting portion and the inner side surface of the heat dissipation cover.

[0008] The canned magnetic pump of the present invention can improve the heat dissipation effect. The third straight section of the inner ring surface of the base has an inner dovetail area and an inner polygonal area connected to the inner dovetail area. The inner polygonal area has a plurality of inner turning surface parts, and an inner corner part is generated between every two inner turning surface parts. The outer peripheral surface of the positioning seat has an outer dovetail area and an outer polygonal area connected to the outer dovetail area. The outer polygonal area has a plurality of outer turning surface parts, and an outer corner part is generated between every two outer turning surface parts. The sink groove and part of the first heat dissipation fins are respectively arranged on the outer turning surface parts, and each outer corner part is provided with a first heat dissipation fin. The gap extending along the long axis parallel to the axis is generated between each outer turning surface part of the outer peripheral surface and the corresponding third straight section of the inner ring surface.

[0009] In the canned magnetic pump capable of improving the heat dissipation effect of the present invention, the positioning seat is provided with a shallow groove parallel to the axis on each outer turning surface portion to generate the gap.

[0010] The beneficial effects of the present invention are as follows: the first heat dissipation fins are provided on the positioning seat, and the gap is generated between the outer peripheral surface and the inner annular surface. The heat energy generated by the stator is dissipated toward the gap through the first heat dissipation fins, and the heat energy is dissipated to the outside through the design of the gap, thereby achieving a better heat dissipation purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional exploded view of an embodiment of a canned magnetic pump capable of improving heat dissipation effect of the present invention;

[0012] Figure 2 is a three-dimensional diagram of the positioning seat of this embodiment;

[0013] Figure 3 is a combined cross-sectional view of this embodiment;

[0014] Figure 4 is along Figure 3 The cross-sectional view taken along the straight line IV-IV in FIG.

[0015] Figure 5 yes Figure 3 A partial enlarged schematic diagram of . DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0017] See also Figure 1 , Figure 3 and Figure 5 An embodiment of the canned magnetic pump capable of improving heat dissipation effect of the present invention comprises a base 10, a positioning seat 20, a motor unit 30, a pump front cover 40, and a heat dissipation cover 50.

[0018] The base 10 is made of a hollow cylindrical plastic material. In this embodiment, the base 10 can be made of an acid- and alkali-resistant engineering plastic material, such as polypropylene (PP), glass fiber reinforced polypropylene (GFRPP), polyvinylidene difluoride (PVDF), carbon fiber filled fluoroplastic resin (CFRFE). ETFE is Ethylene Tetra Fluoro The base 10 includes a main body 101, a side cover 102 connected to the main body 101 along an axis L, a first end face 11 arranged on the main body 101, a second end face 12 opposite to the first end face 11 along the axis L and arranged on the side cover 102, and an inner annular surface 14 connected between the first end face 11 and the second end face 12 and surrounding the axis L to define a receiving hole 13. The inner annular surface 14 is in a stepped shape and has a first straight section 141 intersecting and connected to the first end face 11, a first abutting portion 142 intersecting and connected to the first straight section 141 and substantially parallel to the first end face 11, a second straight section 143 intersecting and connected to the first abutting portion 142 and substantially parallel to the axis L, a second abutting portion 144 intersecting and connected to the second straight section 143 and substantially parallel to the first end face 11, a third straight section 145 intersecting and connected to the second abutting portion 144 and substantially parallel to the axis L, a third abutting portion 145' intersecting and connected to the third straight section 145 and substantially parallel to the first end face 11, and a fourth straight section 145'' intersecting and connected to the third abutting portion 145', and the second end face 12 intersecting and connected to the fourth straight section 145''. Figure 2 and Figure 4 The cross-section of the third straight section 145 perpendicular to the axis L is non-circular. The third straight section 145 has an inner dovetail area 146 and an inner polygonal area 147 connected to the inner dovetail area 146. The inner polygonal area 147 has seven inner turning surface areas 148, and an inner corner portion 149 is formed between every two inner turning surface areas 148.

[0019] With reference Figure 2 and Figure 4The positioning seat 20 is made of aluminum alloy and is hollow cylindrical. It is nested and installed in the accommodating hole 13 of the base 10 in a non-rotatable manner, and includes a first side surface 21 that abuts against the second abutting portion 144, a second side surface 22 opposite to the first side surface 21 along the axis L, an inner circumferential surface 23 connected between the first side surface 21 and the second side surface 22 and surrounding the axis L and defining an inner hole 231, an outer circumferential surface 24 opposite to the inner circumferential surface 23 and relative to the inner annular surface 14, a plurality of recessed grooves 25 recessed from the outer circumferential surface 24 toward the inner circumferential surface 23, and a plurality of first heat dissipation fins 26, and a first heat dissipation fin 26 is generated between two adjacent recessed grooves 25. The cross section of the positioning seat 20 perpendicular to the axis L is non-circular and has a cross-sectional shape corresponding to the receiving hole 13. The outer peripheral surface 24 has an outer dovetail area 241 and an outer polygonal area 242 connected to the outer dovetail area 241. The outer polygonal area 242 has seven outer turning surface parts 243, and an outer corner part 244 is formed between every two outer turning surface parts 243. The sink 25 and most of the first heat dissipation fins 26 are respectively arranged on the outer turning surface parts 243, and each outer corner part 244 may also be provided with a first heat dissipation fin 26. A gap 60 extending along a long axis X parallel to the axis L is generated between each outer turning surface part 243 of the outer peripheral surface 24 and the corresponding third straight section 145 of the inner annular surface 14. In this embodiment, a shallow groove 245 parallel to the axis L is recessed in each outer turning surface part 243 to generate the gap 60. The depth of the shallow groove 245 (gap 60) is about 1 mm.

[0020] The motor unit 30 includes a housing 31 mounted on the base 10, a stator 32 sleeved between the housing 31, the base 10 and the positioning seat 20, a rotor 33 mounted inside the housing 31, and an impeller 34 connected to the rotor 33. One end surface of the stator 32 abuts against the first abutting portion 142, and the outer peripheral surface abuts against the second straight section 143 and the inner peripheral surface 23. The detailed structure and operating principle of the motor unit 30 are irrelevant to the technical problem to be solved by the present invention and are not the focus of the present invention, so they are not explained in detail.

[0021] The pump front cover 40 is fixed to the first end surface 11 of the base 10 by a plurality of screws and covers the outside of the impeller 34. The pump front cover 40 has an inlet 41 arranged along the axis L, and an outlet 42 arranged on one side of the inlet 41 and corresponding to one of the tangent lines of the impeller 34 (not shown).

[0022] The heat dissipation cover 50 is installed inside the base 10. The heat dissipation cover 50 is made of aluminum alloy and includes an inner side surface 51, an outer side surface 52 opposite to the inner side surface 51 along the axis L, and a plurality of second heat dissipation fins 53 protruding from the outer side surface 52. The inner side surface 51 abuts against the third abutting portion 145' and the second side surface 22 of the positioning seat 20, and also abuts against the other end surface of the stator 32. The heat dissipation cover 50 corresponds to the fourth straight section 145" and is shielded by the side cover 102.

[0023] In order to further understand the effects of the various components of the present invention, the technical means used, and the expected effects to be achieved, the following description will be given. It is believed that this will provide a deeper and more specific understanding of the present invention.

[0024] like Figure 3 , Figure 4 and Figure 5 When the canned magnetic pump is assembled, the positioning seat 20 is disposed outside the stator 32, and the base 10 is also disposed outside the positioning seat 20. The heat dissipation cover 50 also abuts against one side of the stator 32 and the positioning seat 20.

[0025] When the stator 32 of the motor unit 30 is powered, the rotor 33 can be driven to rotate, and the rotor 33 synchronously drives the impeller 34 to rotate, so that the liquid introduced from the inlet 41 on the front side of the pump front cover 40 is pumped toward the outlet 42 by the impeller 34, and the purpose of pumping the liquid is achieved.

[0026] The motor unit 30 generates heat energy during operation. When the heat energy is transferred from the stator 32 to the positioning seat 20, the positioning seat 20 has a larger heat dissipation area due to the arrangement of the first heat dissipation fins 26 and can produce a better heat dissipation effect. The heat energy dissipated by the first heat dissipation fins 26 and the sink 25 will be transferred to the heat dissipation cover 50 through the gap 60, and then the second heat dissipation fins 53 will produce a heat dissipation effect to the outside.

[0027] Therefore, the present invention utilizes the first heat dissipation fins 26 provided on the positioning seat 20, and the gap 60 is generated between the outer peripheral surface 24 and the inner annular surface 14, so that the heat energy generated by the stator 32 can be dissipated toward the gap 60 through the first heat dissipation fins 26, and through the design of the gap 60, the heat energy is dissipated toward the heat dissipation cover 50 and the outside of the canned magnetic pump, so as to achieve a better heat dissipation purpose. The heat dissipation cover 50 is also used to abut against the stator 32, so as to directly guide the heat energy of the stator 32.

[0028] In addition, the positioning seat 20 is provided with the sink groove 25 on the outer peripheral surface 24 , which can not only produce the first heat dissipation fins 26 , but also has the effect of reducing the positioning seat 20 and the overall weight.

[0029] In summary, the canned magnetic pump of the present invention can improve the heat dissipation effect, has a simple overall structure, is easy to manufacture and assemble, and can achieve a better heat dissipation effect, thereby truly achieving the purpose of the present invention.

Claims

1. A canned magnetic pump capable of improving heat dissipation effect, comprising a base, a positioning seat, a motor unit and a pump front cover, characterized in that: The base is made of plastic material and is hollow cylindrical, and includes a first end face, a second end face opposite to the first end face along the axis, and an inner annular surface connected to the first end face and the second end face and surrounding the axis and defining a receiving hole; The positioning seat is made of aluminum alloy and is hollow cylindrical, and is installed in the receiving hole of the base, and includes an inner peripheral surface surrounding the axis and defining an inner hole, an outer peripheral surface opposite to the inner peripheral surface and relative to the inner annular surface, a plurality of recessed grooves recessed from the outer peripheral surface toward the inner peripheral surface, and a plurality of first heat dissipation fins, at least one gap is generated between the outer peripheral surface and the inner annular surface, and the first heat dissipation fins are generated between two adjacent recessed grooves; The motor unit comprises a housing mounted on the base, a stator sleeved between the housing, the base and the positioning seat, a rotor mounted inside the housing, and an impeller connected to the rotor; The pump front cover is mounted on the first end surface of the base and covers the outside of the impeller; The canned magnetic pump further comprises a heat dissipation cover mounted on the second end surface of the base, the heat dissipation cover is made of aluminum alloy and comprises an inner side surface, an outer side surface opposite to the inner side surface along the axis, and a plurality of second heat dissipation fins protruding from the outer side surface, the inner side surface abuts against the positioning seat; The inner annular surface of the base is stepped and has a first straight section intersecting and connected to the first end face, a first abutment intersecting and connected to the first straight section and substantially parallel to the first end face, a second straight section intersecting and connected to the first abutment and substantially parallel to the axis, a second abutment intersecting and connected to the second straight section and substantially parallel to the first end face, a third straight section intersecting and connected to the second abutment and substantially parallel to the axis, a third abutment intersecting and connected to the third straight section and substantially parallel to the first end face, and a fourth straight section intersecting and connected to the third abutment, the second end face intersecting and connected to the fourth straight section, the gap is located between the outer peripheral surface and the third straight section, the stator abuts against the first abutment and the inner side surface of the heat dissipation cover, and the positioning seat abuts against the second abutment and the inner side surface of the heat dissipation cover.

2. The canned magnetic pump capable of improving heat dissipation effect according to claim 1, characterized in that: The third straight section of the inner annular surface of the base has an inner dovetail area and an inner polygonal area connected to the inner dovetail area, the inner polygonal area has a plurality of inner turning surface areas, and an inner corner area is generated between every two inner turning surface areas, the outer peripheral surface of the positioning seat has an outer dovetail area and an outer polygonal area connected to the outer dovetail area, the outer polygonal area has a plurality of outer turning surface areas, and an outer corner area is generated between every two outer turning surface areas, the sink groove and part of the first heat dissipation fins are respectively arranged on the outer turning surface areas, and each outer corner area is provided with a first heat dissipation fin, and the gap extending along the long axis parallel to the axis is generated between each outer turning surface area of ​​the outer peripheral surface and the corresponding third straight section of the inner annular surface.

3. The canned magnetic pump capable of improving heat dissipation effect according to claim 2, characterized in that: The positioning seat is provided with a shallow groove parallel to the axis on each outer turning surface portion to generate the gap.

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