TWI759150B - Canned magnetic pump for enhanced stability - Google Patents

Abstract

A canned magnetic pump with enhanced stability, comprising a base, a positioning seat, a motor unit and a pump front cover, the base includes an inner annular surface, and at least a part of the inner annular surface is perpendicular to a section of an axis It is polygonal, the positioning seat includes an outer peripheral surface relative to the inner annular surface, the cross-section of the outer peripheral surface perpendicular to the axis is polygonal, the outer peripheral surface is non-rotatable relative to the inner annular surface, and the motor unit includes A casing installed on the base, a stator set between the casing, the base, and the positioning seat, a rotor installed inside the casing, and an impeller connected to the rotor, the The pump front cover is mounted on the base, and is covered outside the impeller. Therefore, the positioning seat is non-rotatably nested inside the base, which can enhance the stability of starting and running of the motor unit.

Description

Canned magnetic pump for enhanced stability

The present invention relates to a canned magnetic pump, in particular to a canned magnetic pump with enhanced stability.

There is a permanent magnet canned pump (Taiwan certificate number I444536 patent case), which includes a pump front cover, a tripod, an impeller, a rear cover, a fixed shaft and a canned motor. The canned motor consists of a stator. , motor rotor, reinforcement frame, middle frame and rear frame, the bottom of the reinforcement frame is integrally formed with a fixed base; the axial middle position of the inner diameter of the reinforcement frame is provided with a radial annular rib, which is provided with a plurality of Positioning block; the annular rib divides the inner diameter space of the reinforced frame into two front and rear sections, the circular hole-shaped front section is used to tightly install the middle frame, and the rear section is used to tightly install the rear frame. When the middle frame and the rear frame are tightly locked together, the radial annular rib (and a plurality of positioning blocks will be embedded in the grooves on the rear surface of the middle frame to ensure that the three can be combined into one, and that the canned motor is fixed by The base is firmly supported.

Although this permanent magnet canned pump can achieve the purpose of pumping the pump body, because the outer peripheral surface of the middle frame is circular and the front space of the reinforced frame is also in the shape of a circular hole, the middle frame and the front space are forced to pass through. Although the positioning blocks are inserted into the grooves on the rear end of the middle frame, the middle frame and the reinforcing frame can be positioned in the circumferential direction, but during assembly, these It is difficult to align the card slots and the positioning blocks, and it is difficult to install them accurately. For easy installation, there may be some clearance between the card slots and the positioning blocks. As a result, the middle frame and the reinforcement frame are relatively rotated, resulting in poor stability of the middle frame and the reinforcement frame.

In addition, the fixing base is integrally formed at the bottom of the strengthening frame, which not only causes the overall volume of the strengthening frame to be large, but also causes the entire strengthening frame to be damaged if the fixing base is damaged by foreign objects during transportation or use. It may also not produce a secure lock.

Therefore, the purpose of the present invention is to provide a canned magnetic pump that can solve the existing deficiencies and can enhance the stability.

Therefore, the canned magnetic pump with enhanced stability of the present invention includes a base, a positioning seat, a motor unit and a pump front cover. The base is made of plastic material into a hollow cylindrical shape, and includes an inner annular surface surrounding an axis and defining an accommodating hole. At least a part of the inner annular surface perpendicular to the axis has a polygonal cross-section. The positioning seat is made of aluminum. The alloy material is made into a hollow cylindrical shape, and is installed in the receiving hole of the base, and includes an outer peripheral surface relative to the inner ring surface, and the cross-section of the outer peripheral surface perpendicular to the axis is polygonal and the cross-sectional shape corresponds to the an accommodating hole, the outer peripheral surface is non-rotatable relative to the inner annular surface, the motor unit includes a casing mounted on the base, a set of stators arranged between the casing, the base, and the positioning seat , a rotor installed inside the casing, and an impeller connected to the rotor, the pump front cover is installed on the base and covers the outside of the impeller.

The effect of the present invention lies in that at least a part of the inner ring surface of the base has a polygonal cross-section perpendicular to the axis, and the outer peripheral surface of the positioning seat has a polygonal cross-section perpendicular to the axis, so that the positioning seat is non-rotatable. Being nested inside the base not only has a simple overall structure and is easy to assemble, but also can enhance the stability of the starting and running of the motor unit.

Referring to FIGS. 1 to 3 , an embodiment of the canned magnetic pump with enhanced stability of the present invention includes a base 10 , a positioning seat 20 , a motor unit 30 , a pump front cover 40 , a heat dissipation cover 50 , A lower seat 60 , a plurality of axial bolts 70 , and a plurality of locking screws 80 .

The base 10 is made of a plastic material to make a hollow cylinder. In this embodiment, an engineering plastic material with acid and alkali resistance properties can be selected, such as polypropylene (Polypropylene, PP for short), glass fiber reinforced polypropylene (Glass Fiber reinforced Polypropylene, Referred to as GFRPP), polyvinylidene fluoride (Polyvinylidene difluoride, referred to as PVDF), carbon fiber added fluoroplastic resin (Carbon Fiber Filled ETFE, referred to as CFRETFE. ETFE is the English abbreviation of Ethylene Tetra Fluoro Ethylene, the Chinese name is ethylene-tetrafluoroethylene Copolymer, commonly known as fluoroplastic resin), etc., and includes a main body 101, and a side cover 102 connected to the main body 101 along an axis L, a first end face 11 disposed on the main body 101, and a side cover 102. The axis L is opposite to the first end surface 11 and is disposed on the second end surface 12 of the side cover 102 , and is connected between the first end surface 11 and the second end surface 12 and surrounds the axis L and defines a The inner ring surface 14 of the accommodating hole 13 is accommodated. The inner annular surface 14 has a stepped shape, and has a first straight section 141 that intersects with the first end face 11 , and a second straight section 141 that intersects with the first straight section 141 and is substantially parallel to the first end face 11 . an abutting portion 142, a second straight section 143 intersecting with the first abutting section 142 and substantially parallel to the axis L, a second straight section 143 intersecting and connecting with the second straight section 143 and substantially parallel to the first The second abutting portion 144 of the end face 11, a third straight section 145 that intersects with the second abutting section 144 and is substantially parallel to the axis L, and a third straight section 145 that intersects and connects to the third straight section 145 and is substantially parallel The third abutting portion 145' on the first end face 11 and a fourth straight section 145" intersecting with the third abutting portion 145', the second end face 12 intersecting and connecting with the fourth straight section Segment 145". The first abutting portion 142 has a plurality of recessed portions 142' communicating with the receiving hole 13, the second abutting portion 144 has a plurality of screw holes 144' arranged around the axis L at intervals, and a plurality of The groove 144 ″ communicated with the accommodating hole 13. Referring to FIG. 2 and FIG. 4 , at least a part of the inner ring surface 14 perpendicular to the axis L has a polygonal cross-section, which means that the third straight section 145 and the The cross-section of the fourth straight section 145" perpendicular to the axis L is polygonal, and both the third straight section 145 and the fourth straight section 145" have an inner dovetail area 146, and an inner dovetail area 146 is connected to the inner dovetail. The inner polygonal area 147 of the area 146, the inner polygonal area 147 has seven inner turning surfaces 148 arranged at intervals around the axis L, and an inner corner 149 is formed between every two inner turning surfaces 148. In addition, the base 10 further includes a bottom end surface 140 approaching the inner dovetail region 146 , a concave portion 140 ′ recessed in the bottom end surface 140 , and a plurality of lower through holes 140 ″ disposed in the concave portion 140 ′.

Referring to FIG. 2 and FIG. 4 , the positioning seat 20 is made of an aluminum alloy material and is made into a hollow cylindrical shape, and is non-rotatably nested and installed in the receiving hole 13 of the base 10 , and includes a The first side surface 21 of the rest portion 144, a second side surface 22 opposite to the first side surface 21 along the axis L, a second side surface 22 connected between the first side surface 21 and the second side surface 22 and surrounding the axis L and defined An inner peripheral surface 23 of the inner hole 231 , an outer peripheral surface 24 opposite to the inner peripheral surface 23 and opposite to the inner annular surface 14 , and most of the recessed grooves 25 are recessed from the outer peripheral surface 24 toward the inner peripheral surface 23 . , most of the first heat dissipation fins 26, most of the through holes 27 connecting the first side surface 21 and the second side surface 22, and most of the lower screw holes 28 provided at the bottom, forming a first one between the adjacent two sink grooves 25. cooling fins 26 . The cross-section of the outer peripheral surface 24 perpendicular to the axis L is polygonal and the cross-sectional shape corresponds to the receiving hole 13 , the outer peripheral surface 24 is non-rotatable relative to the inner annular surface 14 , and 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 surfaces 243 arranged at intervals around the axis L, and an outer corner is formed between each two outer turning surfaces 243 The recessed grooves 25 and most of the first heat dissipation fins 26 are respectively disposed on the outer turning surface portions 243 , and each outer corner portion 244 may also be provided with a first heat dissipation fin 26 .

The motor unit 30 includes a casing 31 mounted on the base 10 , a stator 32 set between the casing 31 , the base 10 , and the positioning seat 20 , and a stator 32 mounted inside the casing 31 . The rotor 33 , and an impeller 34 connected to the rotor 33 . One end surface of the stator 32 abuts against the first abutting portion 142 , and an outer peripheral surface abuts against the second straight section 143 and the inner peripheral surface 23 . The detailed structure and operation principle of the motor unit 30 have nothing to do with the technical problem to be solved by the present invention and are not the focus of the present invention, so they will not be described further.

The pump front cover 40 is fastened to the first end face 11 of the base 10 by a plurality of screws, and is covered outside the impeller 34 , and has an inlet 41 along the axis L, and an inlet 41 , a side and corresponds to the outlet 42 of the impeller 34 in a tangent (not shown).

The heat dissipation cover 50 is mounted on 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 most of them are protruding from the inner side surface 51 . The second heat dissipation fins 53 on the outer side 52 , and most of the locking holes 54 connecting the inner side 51 and the outer side 52 , the inner side 51 abuts against the third abutting portion 145 ′ and the first position of the positioning seat 20 . The two side surfaces 22 also abut against the other end surface of the stator 32 . The heat dissipation cover 50 corresponds to the fourth straight section 145 ″ and is covered by the side cover 102 .

The lower seat 60 is detachably locked on the bottom of the base 10 and is close to the inner dovetail area 146 . The lower seat 60 has a base portion 61 , a base portion 61 protruding from the base portion 61 and nested in the recess The boss 62 of the portion 140 ′, and most of the through holes 63 communicated with the boss 62 from the base portion 61 .

The axial bolts 70 pass through the locking holes 54 and the through holes 27 and are screwed into the screw holes 144'.

The locking screws 80 are respectively penetrated through the through holes 63 and the lower through holes 140" and screwed into the lower screw holes 28, and the lower seat 60 is locked to the base 10, the positioning The seat 20 is locked on the base 10 .

In order to further understand the functions produced by the cooperation of the various elements of the present invention, the technical means used, and the expected effects, the following descriptions will be given.

As shown in FIGS. 3 , 4 and 5 , after the canned magnetic pump is assembled as a whole, 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 on one side of the stator 32 and the positioning seat 20 .

When the stator 32 of the motor unit 30 is powered on, the rotor 33 can be driven to rotate, and the rotor 33 synchronously drives the impeller 34 to rotate, then the liquid introduced from the inlet 41 on the front side of the front cover 40 of the pump is recirculated by the impeller 34 is pumped towards this outlet 42 and achieves the purpose of pumping the liquid.

The cross section of the third straight section 145 of the base 10 perpendicular to the axis L is polygonal (the third straight section 145 has the inner dovetail area 146 and the inner polygonal area 147 ), and the positioning seat 20 has a polygonal cross section. The cross section of the outer peripheral surface 24 perpendicular to the axis L is polygonal (the outer peripheral surface 24 has the outer dovetail area 241 and the outer polygonal area 242 ), then when the positioning seat 20 is to be embedded in the accommodating hole 13, it can prevent After the positioning seat 20 is embedded in the accommodating hole 13, the positioning seat 20 can be non-rotatably positioned in the base 10, and is inserted through the axial bolts 70 in the base 10. The locking holes 54 and the through holes 27 are screwed to the screw holes 144 ′, so that the positioning seat 20 is stably located between the base 10 and the heat dissipation cover 50 in the axial direction, which can strengthen the motor unit 30 Stability of starting and running.

And using the locking screws 80 to pass through the through holes 63 , the lower through holes 140 ″ and screw them to the lower screw holes 28 , the lower seat 60 is detachably locked to the base 10 . At the bottom, the lower seat 60 and the base 10 can be separately maintained and replaced. Even if the lower seat 60 is damaged by foreign objects during transportation or use, only the lower seat 60 needs to be replaced.

In addition, the motor unit 30 will generate thermal energy during operation, and when the thermal 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 A better heat dissipation effect can be produced, and the heat energy dissipated by the first heat dissipation fins 26 and the sink grooves 25 is transferred to the heat dissipation cover 50, and the second heat dissipation fins 53 generate heat to the outside. , the service life of the motor unit 30 can be extended.

In addition, the outer peripheral surface 24 of the positioning seat 20 is recessed with the sinking grooves 25 , in addition to forming the first heat dissipation fins 26 , the positioning seat 20 has the effect of saving raw materials and reducing the overall weight of the positioning seat 20 . The first abutting portion 142 of the base 10 is recessed with the recessed portions 142', and the second abutting portion 144 is recessed with the recesses 144", which also have the effect of saving raw materials and reducing the overall weight. In addition, although the thickness between the first end surface 11 of the base 10 and the first abutting portion 142 is relatively large, due to the arrangement of the recessed portions 142 ′, the base 10 can be formed during the molding and cooling process of the base 10 . Reduce the amount of deformation.

To sum up, the canned magnetic pump with enhanced stability of the present invention has a simple overall structure, is easy to manufacture and assemble, and can achieve the effect of stable operation, which can indeed achieve the purpose of the present invention.

However, the above are only examples of the present invention, and should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included in the scope of the present invention. within the scope of the invention patent.

10: Pedestal 101: Main part 102: Side cover parts 11: The first end face 12: Second end face 13: accommodating hole 14: inner ring surface 141: The first straight section 142: The first contact part 142': Recessed part 143: Second straight segment 144: Second Abutment 144': screw hole 144": groove 145: Third straight segment 145': The third abutment 145": Fourth straight section 146: Inner dovetail area 147: Inner Polygon Area 148: Inside Turning Face 149: Inside corner 140: Bottom end face 140': depression 140": Bottom perforation 20: Positioning seat 21: The first side 22: Second side 23: Inner peripheral surface 231: Inner hole 24: Outer peripheral surface 241: Outer Dovetail Area 242: Outer Polygon Area 243: Outer Turning Face 244: Outer corner 25: Sink 26: The first cooling fin 27: Piercing 28: Lower perforation 30: Motor unit 31: Shell 32: Stator 33: Rotor 34: Impeller 40: Pump front cover 41: Entrance 42: Export 50: Cooling cover 51: inner side 52: Outer side 53: Second cooling fin 54: Keyhole 60: down 61: base part 62: Boss 63: Through hole 70: Axial bolt 80: Locking screws L: axis

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: 1 is a perspective view of an embodiment of the canned magnetic pump with enhanced stability of the present invention; 2 is an exploded perspective view of a base and a positioning seat of the embodiment; 3 is a combined cross-sectional view of this embodiment; Fig. 4 is a sectional view along the line IV-IV in Fig. 3; and FIG. 5 is a partial enlarged schematic view of FIG. 3 .

10: Pedestal

101: Main part

102: Side cover parts

12: Second end face

13: accommodating hole

14: inner ring surface

141: The first straight section

142: The first contact part

142': Recessed part

143: Second straight segment

144: Second Abutment

144': screw hole

144": groove

145: Third straight segment

145': The third abutment

145": Fourth straight section

146: Inner dovetail area

147: Inner Polygon Area

148: Inside Turning Face

149: Inside corner

140: Bottom end face

140': depression

140": Bottom perforation

20: Positioning seat

21: The first side

22: Second side

23: Inner peripheral surface

231: Inner hole

24: Outer peripheral surface

241: Outer Dovetail Area

242: Outer Polygon Area

243: Outer Turning Face

244: Outer corner

25: Sink

26: The first cooling fin

27: Piercing

28: Lower perforation

60: down

61: base part

62: Boss

63: Through hole

80: Locking screws

L: axis

Claims (7)

A canned magnetic pump with enhanced stability, comprising: a base made of plastic material into a hollow cylindrical shape, and comprising a first end face, a second end face opposite to the first end face along the axis, and a An inner annular surface connected between the first end surface and the second end surface and surrounding an axis and defining an accommodating hole, the cross section of at least a part of the inner annular surface perpendicular to the axis is polygonal, and the inner annular surface is stepped and has a first straight section intersecting and connecting to the first end face, a first abutting portion intersecting and connecting to the first straight section and substantially parallel to the first end face, and a first abutting section intersecting and connecting to the first straight section. an abutting portion and a second straight section substantially parallel to the axis, a second abutting section intersecting and connecting to the second straight section and substantially parallel to the first end face, a second abutting section intersecting and connecting to the second abutting section a third straight section that is substantially parallel to the axis, a third abutting section that intersects and connects to the third straight section and is substantially parallel to the first end face, and a third abutting section that intersects and connects to the third abutting section The fourth straight section of the section, the second end face is intersected and connected to the fourth straight section; a positioning seat is made of aluminum alloy material into a hollow cylindrical shape, and is installed in the accommodating hole of the base, the positioning seat abutting against the second abutting portion, and including an outer peripheral surface relative to the inner annular surface, the outer peripheral surface perpendicular to the axis has a polygonal cross-section and a cross-sectional shape corresponding to the accommodating hole, and the outer peripheral surface is non-rotatable relative to the inner ring surface; a motor unit, including a casing mounted on the base, a stator set between the casing, the base, and the positioning seat, a motor unit mounted inside the casing The rotor, and an impeller connected to the rotor, the stator abuts against the first abutting portion; and A pump front cover is installed on the base and covered outside the impeller. The canned magnetic pump with enhanced stability as claimed in claim 1, wherein 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 faces arranged at intervals around the axis, an inner turning corner is formed between every two inner turning faces, the outer peripheral surface of the positioning seat has an outer dovetail area, and a In the outer polygonal area of the outer dovetail area, the outer polygonal area has a plurality of outer inflection surfaces arranged at intervals around the axis, and an outer corner is formed between every two outer inflection surfaces. The canned magnetic pump with enhanced stability as claimed in claim 2, wherein the fourth straight section of the inner annular surface of the base also has an inner dovetail area and an inner polygon connected to the inner dovetail area The inner polygonal area has a plurality of inner turning face portions, and an inner turning portion is formed between every two inner turning face portions. The canned magnetic pump with enhanced stability according to claim 1, further comprising a heat dissipation cover mounted on the second end face of the base, and a plurality of axial bolts, the heat dissipation cover is made of aluminum alloy material, and Including an inner side surface, an outer side surface opposite to the inner side surface along the axis, and most of the locking holes connecting the inner side surface and the outer side surface, the inner side surface abuts against the positioning seat and the third abutting portion, the The second abutting portion of the base has a plurality of screw holes arranged around the axis at intervals, and the positioning seat further includes a first side surface abutting against the second abutting portion, a On the second side of the side surface, and most of the through holes connecting the first side surface and the second side surface, the axial bolts pass through the locking holes, the through holes are screwed into the screw holes. The canned magnetic pump with enhanced stability as claimed in claim 2, further comprising a The lower seat is detachably locked on the base, and most of the locking screws for locking the lower seat on the base are close to the inner dovetail area. The canned magnetic pump with enhanced stability as claimed in claim 5, wherein the base further comprises a bottom end surface close to the inner dovetail area, a concave portion recessed on the bottom end surface, and a plurality of The lower through hole in the concave portion, the lower seat has a base portion, a boss protruding from the base portion, and a plurality of through holes communicating with the boss from the base portion, and the positioning seat also has a plurality of sets. In the lower screw holes at the bottom, the locking screws pass through the through holes, the lower through holes, and are screwed into the lower screw holes. The canned magnetic pump with enhanced stability according to claim 1, wherein the first abutting portion of the base has a plurality of recessed portions communicating with the receiving hole, and the second abutting portion has a plurality of concave portions connected to the receiving hole. The accommodating hole communicates with the groove.

Images