Canned magnetic pump with rear cover for enhanced heat dissipation

Abstract

A canned magnetic pump with a rear cover for enhanced heat dissipation comprises a base, a positioning seat, a motor unit, a pump front cover, and a rear cover. The base defines a receiving hole, the positioning seat is installed in the receiving hole of the base, the motor unit comprises a housing, a stator, a rotor, and an impeller, the pump front cover is installed on the base and is covered on the outside of the impeller, the rear cover comprises an annular rib that abuts against the inner side surface of the base, a closed ring-shaped annular rib protruding from the inner side surface, and an inner heat conduction space defined by the annular rib and the inner side surface, the annular rib having an annular end face spaced apart from the inner side surface and airtightly abutting against the positioning seat, and the inner heat conduction space is adjacent to the stator. The arrangement of the rear cover can produce a better heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to a canned magnetic pump, in particular to a canned magnetic pump with a rear cover having enhanced heat dissipation effect. Background Art

[0002] There is a canned magnetic pump (patent case No. M577069, 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 and has a main disk and a side cover. The positioning seat is made of metal and is hollow cylindrical and nested in a coupling hole of the main disk. The motor unit includes a shell mounted on the base, a stator sleeved between the shell, 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 base and covers the outside of the impeller. The heat dissipation cover is mounted 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 applicant believes that the heat energy generated by the stator can be dissipated more effectively. Summary of the Invention

[0004] The object of the present invention is to provide a canned magnetic pump with a rear cover having enhanced heat dissipation effect, which can improve heat dissipation effect.

[0005] The canned magnetic pump with a rear cover having an enhanced heat dissipation effect of the present invention comprises a base, a positioning seat, a motor unit, a pump front cover and a rear cover, the base being made into a hollow cylindrical shape and surrounding an axis and defining a receiving hole, the positioning seat being made into a hollow cylindrical shape and installed in the receiving hole of the base, the motor unit comprising a shell mounted on the base, a stator sleeved between the shell, the base and the positioning seat, a rotor mounted inside the shell, and an impeller connected to the rotor, the pump front cover being mounted on the base and covering the outside of the impeller, the rear cover being opposite to the pump front cover along the axis, and comprising an annular rib abutting against the inner side surface of the base, a closed ring-shaped annular rib protruding from the inner side surface, and an inner heat conduction space defined by the annular rib and the inner side surface, the annular rib having an annular end surface spaced apart from the inner side surface and airtightly abutting against the positioning seat, and the inner heat conduction space being adjacent to the stator.

[0006] The canned magnetic pump with a rear cover having enhanced heat dissipation of the present invention comprises an annular rib on the rear cover that further comprises an inner annular surface adjacent to the inner heat conduction space and intersecting the annular end surface, and an outer annular surface opposite to the inner annular surface and intersecting between the annular end surface and the inner side surface. The rear cover further comprises an outer heat conduction space defined by the annular rib and the inner side surface, the outer annular surface being adjacent to the outer heat conduction space, and a plurality of ribs protruding from the outer annular surface and connected to the inner side surface.

[0007] In the canned magnetic pump with a rear cover having enhanced heat dissipation effect of the present invention, the plurality of ribs of the rear cover are spaced apart around the axis and arranged in a radial shape.

[0008] The canned magnetic pump with a rear cover having enhanced heat dissipation effect of the present invention further comprises a leak-proof ring, which is airtightly clamped between the positioning seat and the ring end surface.

[0009] The beneficial effect of the present invention is that the inner heat conduction space is defined by the annular ribs of the rear cover, and a heat dissipation space is provided between the stator and the inner side surface, which can effectively improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a perspective exploded view of an embodiment of a canned magnetic pump with a rear cover having enhanced heat dissipation effect according to the present invention;

[0011] Figure 2 is a planar combined sectional view of this embodiment;

[0012] Figure 3 yes Figure 2 A partial enlarged schematic diagram;

[0013] Figure 4 is a perspective view of a rear cover of this embodiment;

[0014] Figure 5 It is a three-dimensional view of the back cover of this embodiment from another perspective. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0016] See Figures 1 to 4 An embodiment of the canned magnetic pump with a rear cover having enhanced heat dissipation effect of the present invention includes a base 10, a positioning seat 20, a motor unit 30, a pump front cover 40, a rear cover 50 and two leak-proof rings 61 and 62.

[0017] The base 10 is made of a hollow cylindrical plastic material. In this embodiment, it can be made of an engineering plastic material with acid and alkali resistance, such as polypropylene (PP), glass fiber reinforced polypropylene (GFRPP), polyvinylidene difluoride (PVDF), carbon fiber filled fluoroplastic resin (CFRFE). ETFE is an English name for Ethylene The present invention is an abbreviation of Tetrafluoroethylene, and its Chinese name is ethylene-tetrafluoroethylene copolymer, commonly known as fluoroplastic resin), etc., and includes a main body 101, a side cover 102 connected to the main body 101 along an axis L, a first end face 11 provided on the main body 101, a second end face 12 opposite to the first end face 11 along the axis L and provided 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 stepped 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 146 intersecting and connected to the third straight section 145 and substantially parallel to the first end face 11, and a fourth straight section 147 intersecting and connected to the third abutting portion 146, and the second end face 12 intersects and is connected to the fourth straight section 147.

[0018] The positioning seat 20 is made of aluminum alloy and is hollow and cylindrical. It is non-rotatably nested in the receiving hole 13 of the base 10 and includes a first side surface 21 that abuts the second abutting portion 144, a second side surface 22 opposite the first side surface 21 along the axis L, an inner peripheral surface 23 connecting the first and second side surfaces 21, surrounding the axis L and defining an inner hole 231, and an outer peripheral surface 24 opposite the inner peripheral surface 23 and opposite the third straight section 145. The first side surface 21 has a first groove 211 surrounding the axis L. The second side surface 22 is located between the second abutting portion 144 and the third abutting portion 146, and is spaced apart from the third abutting portion 146. The second side surface 22 has a second groove 221 surrounding the axis L. The anti-leakage rings 61 and 62 are respectively installed in the first groove 211 and the second groove 221 , and the anti-leakage ring 61 is airtightly pressed against the second abutting portion 144 .

[0019] 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 within the housing 31, and an impeller 34 connected to the rotor 33. The stator 32 has an inner end surface 321 that abuts the first abutting portion 142, an outer end surface 322 opposite the inner end surface 321 along the axis L, and an outer surface 323 intersecting and connecting the inner end surface 321 and the outer end surface 322. The outer surface 323 abuts the second straight section 143 and the inner circumferential surface 23. The detailed structure and operating principle of the motor unit 30 are not relevant to the technical problem to be solved by the present invention and are not the focus of this invention, so they will not be described in detail.

[0020] 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 .

[0021] The rear cover 50 is fixed to the base 10 with a plurality of screws. The rear cover 50 is made of aluminum alloy and is opposite to the pump front cover 40 along the axis L. The rear cover 50 includes an inner side surface 51 abutting against the third abutting portion 146, an outer side surface 52 opposite to the inner side surface 51 along the axis L, an annular rib 53 protruding from the inner side surface 51 and in the shape of a closed ring, an inner heat conduction space 54 defined by the annular rib 53 and the inner side surface 51, an outer heat conduction space 55 defined by the annular rib 53 and the inner side surface 51, a plurality of ribs 56 connected to the annular rib 53 and protruding into the outer heat conduction space 55, and a plurality of heat dissipation fins 57 (see FIG. 1 ) protruding from the outer side surface 52. Figure 5The annular rib 53 includes an annular end surface 531 spaced apart from the inner side surface 51 and airtightly abutting the second side surface 22 of the positioning seat 20; an inner annular surface 532 adjacent to the inner heat transfer space 54 and intersecting the annular end surface 531; and an outer annular surface 533 opposite the inner annular surface 532 and intersecting between the annular end surface 531 and the inner side surface 51. The inner heat transfer space 54 is adjacent to the stator 32. The annular end surface 531 is tightly pressed against the leakproof ring 62 in the second groove 221, so that the leakproof ring 62 is airtightly clamped between the positioning seat 20 and the annular end surface 531. The rear cover 50 corresponds to the fourth straight section 147 and is shielded by the side cover 102. The ribs 56 protrude from the outer annular surface 533 and are connected to the inner side surface 51. The ribs 56 are spaced apart and arranged radially around the axis L. The rear end of the housing 31 of the motor unit 30 abuts against the inner side surface 51 .

[0022] In order to further understand the functions, technical means, and expected effects of the various components of the present invention, the following description will be given. It is believed that this will provide a deeper and more specific understanding of the present invention.

[0023] For example Figures 2 to 4 As shown, when the canned magnetic pump is fully assembled, the positioning seat 20 is disposed outside the stator 32, and the base 10 is also disposed outside the positioning seat 20. The pump front cover 40 is locked to the first end surface 11 of the base 10, and the rear cover 50 is locked to the positioning seat 20 and positioned relative to the base 10, with the inner side surface 51 abutting against the third abutting portion 146. The rear cover 50 also abuts against the second side surface 22 of the positioning seat 20 in an airtight manner via the leak-proof ring 62.

[0024] When the stator 32 of the motor unit 30 is powered, it can drive the rotor 33 to rotate, and the rotor 33 synchronously drives the impeller 34 to rotate. The liquid introduced from the front side of the pump front cover 40 is then pumped toward the outside of the pump front cover 40 by the impeller 34, thereby achieving the purpose of pumping the liquid.

[0025] Moreover, if Figure 3 and Figure 4 As shown, by utilizing the inner heat-conducting space 54 defined by the annular rib 53 and the inner side surface 51, and the fact that the inner heat-conducting space 54 is adjacent to the stator 32, the heat energy generated by the motor unit 30 during operation is dissipated from the stator 32 to the inner heat-conducting space 54, and after being absorbed by the rear cover 50, is transferred to the outside by the heat dissipation fins 57, thereby producing a better heat dissipation effect and extending the service life of the motor unit 30.

[0026] Furthermore, the ribs 56 are protruding from the outer annular surface 533 and arranged radially extending into the outer heat-conducting space 55, thereby increasing the heat dissipation area of the rear cover 50. The annular end surface 531 of the annular rib 53 is airtightly abutted against the second side surface 22 of the positioning seat 20. The provision of the ribs 56 increases the contact area with the positioning seat 20 and enhances the support between the positioning seat 20 and the rear cover 50, thereby firmly positioning the rear cover 50 relative to the positioning seat 20. The positioning seat 20 is then axially stably fixed between the base 10 and the rear cover 50, thereby enhancing the stability of the motor unit 30 during startup and operation.

[0027] Furthermore, the end surface 531 of the annular rib 53 is pressed against the second side surface 22 of the positioning seat 20 and the anti-leakage ring 62 in an airtight manner, so that the stator 32 can have better anti-leakage performance.

[0028] In addition, the ribs 56 are arranged radially and protruded on the outer annular surface 533 , which not only have the function of heat dissipation fins but also save materials and reduce the weight of the rear cover 50 and the entire structure.

[0029] In summary, the canned magnetic pump with a rear cover having enhanced heat dissipation effect of the present invention 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 with a rear cover for enhanced heat dissipation, comprising a base, a positioning seat, a motor unit, a pump front cover, and a rear cover, characterized in that: The base is formed into a hollow cylindrical shape and surrounds the axis and defines a receiving hole; The positioning seat is made into a hollow cylindrical shape and is installed in the receiving hole of the base; The motor unit includes 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 base and covers the outside of the impeller; The rear cover is opposite to the pump front cover along the axis, and includes an annular rib that rests against the inner side surface of the base, a closed ring-shaped annular rib protruding from the inner side surface, and an inner heat-conducting space defined by the annular rib and the inner side surface. The annular rib has an annular end surface that is spaced apart from the inner side surface and rests airtightly against the positioning seat. The inner heat-conducting space is adjacent to the stator.

2. The canned magnetic pump with a rear cover having enhanced heat dissipation according to claim 1, characterized in that: The annular rib of the rear cover further comprises an inner annular surface adjacent to the inner heat-conducting space and intersecting the annular end surface, and an outer annular surface opposite to the inner annular surface and intersecting between the annular end surface and the inner side surface. The rear cover further comprises an outer heat-conducting space defined by the annular rib and the inner side surface. The outer annular surface is adjacent to the outer heat-conducting space. The rear cover further comprises a plurality of ribs protruding from the outer annular surface and connected to the inner side surface.

3. The canned magnetic pump with a rear cover having enhanced heat dissipation according to claim 2, characterized in that: The plurality of ribs of the rear cover are spaced apart around the axis and arranged in a radial shape.

4. The canned magnetic pump with a rear cover having enhanced heat dissipation according to claim 1, characterized in that: It also includes a leak-proof ring, which is airtightly clamped between the positioning seat and the ring end surface.

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