TWM579212U - Canned magnetic pump - Google Patents

Abstract

A canned magnetic pump includes a positioning unit, a motor unit, a pump front cover and a heat dissipation cover. The positioning unit has a positioning seat around an axis and defining an inner hole, the positioning seat has an outer annular surface, and the outer annular surface has a polygonal shape perpendicular to the contour of the axis, and the motor unit is mounted on the positioning unit The front cover of the pump is mounted on the side of the positioning seat along the axis, and the heat dissipation cover is mounted on the other side of the positioning seat along the axis, and has an end plane abutting against the positioning seat, and a direction along the axis is opposite to The outer side surface of the end plane, and a plurality of heat dissipating fins protruding from the outer side surface. The shape of the outer ring surface of the positioning seat is polygonal, and can have a large heat dissipation area and a better heat dissipation effect.

Description

Canned magnetic pump

The present invention relates to a liquid pumping device, and more particularly to a canned magnetic pump.

There is a magnetic drive pump (Taiwan Certificate No. I424661), which includes a front cover, a support frame, an impeller, a rear cover, an inner rotor, an outer rotor, a fixed shaft and a bracket. The bracket is generally made into a hollow cylindrical shape, and the surface has a limited heat dissipation area and has no heat dissipation structure, which may affect the service life of the pump.

Another type of permanent magnet canned pumped canned motor (Taiwan Certificate No. I381100) consists of a motor stator, a motor middle frame, a motor rear frame, a pump back cover, a motor rotor and a fixed shaft. The outer peripheral surface of the middle frame of the motor is provided with a plurality of heat dissipation fins, and the structure of the frame of the motor is relatively complicated, the mold opening cost is high, the cost is high, and the heat dissipation is provided on the outer peripheral surface of the frame of the motor. The fins will cause the overall volume to be large and cannot be miniaturized. In addition, the patent cases such as Taiwan's certificate number Nos. M369391 and I441984 have the same problem.

Accordingly, it is an object of the present invention to provide a canned magnetic pump that solves the problems of the prior art.

Therefore, the novel canned magnetic pump comprises a positioning unit, a motor unit, a pump front cover and a heat dissipation cover. The positioning unit has a positioning seat surrounding an axis and defining an inner hole, the positioning seat has an outer annular surface, and the outer annular surface has a polygonal shape perpendicular to the contour of the axis, and the motor unit includes a mounting portion a housing in the inner hole of the positioning unit, a stator disposed between the housing and the positioning seat, a rotor mounted inside the housing, a rotating shaft mounted on the housing and supporting the rotor, And an impeller connected to the rotor, the pump front cover is mounted on the side of the positioning seat along the axis, and is disposed outside the impeller, and the heat dissipation cover is mounted on the other side of the positioning seat along the axis, and has a Abutting against an end plane of the positioning seat, an outer side surface opposite to the end plane along the axis, and a plurality of heat dissipating fins protruding from the outer side surface.

The utility model has the advantages that the outer ring surface of the positioning unit has a polygonal shape perpendicular to the contour of the axis, and under the same diameter condition, the positioning unit has a large heat dissipation area, which can generate a better heat dissipation effect.

Referring to FIG. 1 to FIG. 3, an embodiment of the present canned magnetic pump includes a positioning unit 10, a motor unit 20, a pump front cover 30, and a heat dissipation cover 40.

The positioning unit 10 includes a positioning frame 11 in the shape of a hollow ring frame, a base 12 integrally connected to the positioning base 11 , and a ring frame member 13 that is locked to the positioning seat 11 and has a hollow shape. The positioning seat 11 surrounds an axis L and defines an inner hole 14. The positioning seat 11 has an outer annular surface 111. The outer annular surface 111 has a polygonal shape perpendicular to the contour of the axis L. In this embodiment, the positioning seat 11 has a polygonal shape. The contour shape of the outer annular surface 111 perpendicular to the axis L is octagonal.

The motor unit 20 includes a housing 21 mounted in the inner hole 14 of the positioning unit 10, a stator 22 disposed between the housing 21 and the positioning base 11, and a housing 22 mounted therein. A rotor 23, a rotating shaft 25 mounted to the housing 21 for supporting the rotor 23, and an impeller 24 coupled to the rotor 23. The housing 21 has a main tubular portion 211 for mounting with the rotating shaft 23 and having a hollow cylindrical shape, and a flange 212 connected to the main cylindrical portion 211 and disposed perpendicular to the axis L. The main tubular portion 211 Together with the flange 212, a receiving space 213 is provided which is disposed along the axis L and is open in one direction.

The pump front cover 30 is mounted on the side of the positioning seat 11 along the axis L, and is disposed outside the impeller 24 . The flange 212 is sandwiched between the ring frame member 13 and the pump front cover 30 .

The heat dissipation cover 40 is mounted on the other side of the positioning seat 11 along the axis L, and has an end surface 41 abutting against the positioning seat 11 , an outer side surface 42 opposite to the end plane 41 along the axis L, and Most of the heat dissipation fins 43 are protruded from the outer side surface 42. The heat dissipating fins 43 together form a polygonal outer ring edge 431. The outer ring edge 431 is adjacent to the outer ring surface 111. The outer ring edge 431 has a contour shape similar to the outer ring surface 111 being perpendicular to the outer ring surface 111. The cross-sectional shape of the axis L.

In order to further understand the functions, technical means, and expected effects of the cooperation of the various components of the present invention, it is to be noted that the following is a more in-depth and specific understanding of the present invention.

As shown in FIG. 1 and FIG. 3 , when the entire canned magnetic pump device is assembled, the positioning unit 11 can be used to integrally mount the motor unit 20 , and the pump front cover 30 is locked to the positioning seat 11 . On the side of the ring frame member 13 , the heat dissipating cover 40 is locked on the other side of the positioning base 11 , and the integrated magnetic pump device is quite stable.

And when the stator 22 is powered on, the rotor 23 can be driven to rotate relative to the rotating shaft 25, and the rotor 23 synchronously drives the impeller 24 to rotate, and the liquid introduced by the pump front cover 30 is licked by the impeller 24 The delivery is discharged to the outside of the pump front cover 30 to achieve the purpose of pumping liquid.

Further, as shown in FIG. 1, FIG. 2 and FIG. 4, the outer ring surface 111 of the positioning seat 11 has an octagonal shape in a contour perpendicular to the axis L, and has a cylindrical shape with the conventional bracket. Under the same diameter condition, the positioning seat 11 has a large heat dissipation area, which can generate a better heat dissipation effect, and does not need to be provided with the heat dissipation fins in the positioning seat 11. The positioning unit 10 is easy to manufacture and has a low cost. . In addition, the arrangement of the heat dissipation fins 43 of the heat dissipation cover 40 can increase the overall heat dissipation effect of the canned magnetic pump.

It is to be noted that, as shown in FIG. 4, the heat dissipation fins 43 of the heat dissipation cover 40 collectively form an outer annular edge 431 having a polygonal shape, and the outer annular edge 431 has a contour shape similar to the outer annular surface 111. The cross-sectional shape perpendicular to the axis L can also increase the area of the heat dissipation cover 40 on which the heat dissipation fins 43 are disposed, and the heat dissipation cover 40 has a good heat dissipation effect. Moreover, the total heat dissipation area formed by the outer ring edge 431 is larger than the area formed by the cross-sectional shape of the outer ring surface 111 perpendicular to the axis L, and the heat dissipation cover 40 has a good heat dissipation effect.

In summary, the novel canned magnetic pump has a simple overall structure, can produce a better heat dissipation effect, and can achieve miniaturization purposes, and can indeed achieve the purpose of the present invention.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

10‧‧‧ Positioning unit  11‧‧‧ Positioning Block  111‧‧‧ outer annulus  12‧‧‧Base  13‧‧‧ ring frame parts  14‧‧‧ 内孔  L‧‧‧ axis  20‧‧‧Motor unit  21‧‧‧ housing  211‧‧‧ main tube  212‧‧‧Flange  213‧‧‧ accommodating space  22‧‧‧ Stator  23‧‧‧Rotor  24‧‧‧ Impeller  25‧‧‧ shaft  30‧‧‧ pump front cover  40‧‧‧heating cover  41‧‧‧End plane  42‧‧‧Outside  43‧‧‧Heat fins  431‧‧‧ outer ring

Other features and effects of the present invention will be apparent from the following description of the drawings, in which:  1 is a perspective assembled view of an embodiment of the canned magnetic pump of the present invention;  Figure 2 is an exploded perspective view of the embodiment;  Figure 3 is a front elevational cross-sectional view showing one of the embodiments; and  Figure 4 is a schematic side view of one of the embodiments.  

Claims (6)

A canned magnetic pump comprising:  a positioning unit having a positioning seat surrounding an axis and defining an inner hole, the positioning seat having an outer annular surface, the outer annular surface having a polygonal shape perpendicular to the contour of the axis;  a motor unit includes a housing mounted in the inner hole of the positioning unit, a stator disposed between the housing and the positioning seat, a rotor mounted inside the housing, and a housing mounted to the housing a shaft for supporting the rotor, and an impeller coupled to the rotor;  a pump front cover mounted on one side of the positioning seat along the axis and disposed outside the impeller; and  a heat dissipating cover is mounted on the other side of the positioning seat along the axis, and has an end plane abutting the positioning seat, an outer side surface opposite to the end plane along the axis, and a plurality of protrusions on the outer side surface Cooling fins.   The canned magnetic pump of claim 1, wherein the heat dissipating fins of the heat dissipating cover together form a polygonal outer contour edge, the outer ring edge approaching the outer ring surface, the outer ring The contour shape of the rim approximates the cross-sectional shape of the outer annulus perpendicular to the axis. The canned magnetic pump according to claim 2, wherein an outer annular edge of the heat dissipating fins of the heat dissipating cover forms a total heat dissipating area larger than an area formed by a cross section of the outer annular surface perpendicular to the axis. The canned magnetic pump of claim 1, wherein the positioning unit further has a base integrally connected to the positioning seat. The canned magnetic pump of claim 4, wherein the positioning unit further comprises a ring frame member that is hollowed to the positioning seat, the housing of the motor unit having a rotor and the rotating shaft a main tubular portion that is mounted and has a hollow cylindrical shape, and a flange that is connected to the main tubular portion and disposed perpendicular to the axis, the main tubular portion and the flange jointly define a one-way opening along the axis The accommodating space is sandwiched between the ring frame member and the front cover of the pump. The canned magnetic pump according to claim 1, wherein the outer ring surface of the positioning unit has an octagonal shape in a contour shape perpendicular to the axis.