CN115441629A - Direct-drive brushless motor isolation pump - Google Patents

Abstract

The invention discloses a direct-drive brushless motor isolation pump which comprises a shell, an impeller, a magnet, an isolation sleeve, an iron core, a winding, a controller and a mounting piece, wherein the isolation sleeve is arranged in the shell and divides the space inside the shell into a first space and a second space, an inlet and an outlet are formed in the side wall of the first space, a support shaft is arranged in the first space, the impeller is arranged on the support shaft, the magnet is fixed on the impeller by using the mounting piece, the magnet is arranged around the support shaft, the iron core, the winding and the controller are arranged in the second space, the iron core is arranged in an annular shape, the plane of the iron core is perpendicular to the support shaft and parallel to the plane of the magnet, and the winding is flatly paved on one side surface of the iron core, which is close to the magnet. Compared with the prior art, the invention has the advantages of small volume and high stability.

Description

Direct-drive brushless motor isolation pump

Technical Field

The invention relates to the field of pumps, in particular to a direct-drive brushless motor isolation pump.

Background

Most of traditional brushless motor pumps adopt brushless motors, and use shafts to transmit power to drive rotor impellers to work, so that the output of flow and pressure is realized. As shown in fig. 1 and 2, it mainly comprises a pump casing a1, an impeller a2, a front end cover a3, a pump head a4, a brushless motor assembly a5, a junction box a6, a circuit board a7, a heat conducting member a8, etc. This kind of design brushless motor subassembly a5 is cylindrical stator and rotor commonly used, and output mainly relies on the axle to transmit the impeller, and the pump is bulky, and liquid need flow to the rotor below, and the impurity in the liquid is easy to be here accumulated, leads to the rotor card to die after long-time. The system has the defects of large transmission space, low reliability and the like, and cannot meet the requirements of small volume, high performance and high reliability of the conventional thermal management system. In view of this, the inventor of the present application has made extensive studies to obtain a direct-drive brushless motor isolation pump.

Disclosure of Invention

The invention aims to provide a direct-drive brushless motor isolation pump which has the advantages of small volume and high stability.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a direct drive brushless motor isolating pump, includes casing, impeller, magnet, separation sleeve, iron core, winding, controller and installed part, the separation sleeve is located will in the casing first space and second space are cut apart into to the inside space of casing, be equipped with import and export on the lateral wall in first space, be equipped with the back shaft in the first space, the impeller is located on the back shaft, magnet utilizes the installed part is fixed in on the impeller, magnet encircles the back shaft sets up, iron core, winding and controller are located in the second space, the iron core sets up to cyclic annular, its place plane perpendicular to the back shaft, and be on a parallel with magnet place plane, the winding lay in the iron core is close to on a side of magnet, the winding with controller electric connection.

In a preferred embodiment, the winding is a three-phase winding.

In a preferred embodiment, the housing includes a volute, a pump body, and a connection bolt with which the volute and the pump body are connected.

In a preferred embodiment, a seal is further included, the seal being disposed between the isolation sleeve and an inner wall of the housing.

In a preferred embodiment, the seal is made of a rubber material.

In a preferred embodiment, the magnet is provided in a ring shape, and an annular mounting groove is provided on the impeller, in which the magnet is disposed.

In a preferred embodiment, the mounting part comprises a fixing ring and a fixing bolt, the fixing ring covers a gap between the magnet and the side wall of the annular mounting groove, a fixing through hole is formed in the fixing ring, a fixing screw hole is formed in the impeller, and the fixing bolt is matched with the fixing screw hole after penetrating through the fixing through hole.

In a preferred embodiment, a plurality of arc-shaped strips are arranged on the side portion of the magnet, arc-shaped grooves corresponding to the arc-shaped strips are arranged on the side wall of the annular mounting groove, and the arc-shaped strips are matched with the arc-shaped grooves.

In a preferred embodiment, the fixing ring is fixedly connected with the magnet, a plurality of clamping parts distributed circumferentially are arranged on the fixing ring, each clamping part comprises a support, an elastic part and a positioning block, the support comprises a connecting portion and a supporting portion, one end of the connecting portion is connected with the fixing ring, a settling through hole is formed in the supporting portion, a step is arranged on the hole wall of the settling through hole, the elastic part is arranged on the step, the positioning block is arranged in a tubular shape, an arc-shaped chamfer is arranged at the top edge of the positioning block, the positioning block is inserted into the settling through hole and connected with the elastic part, a positioning groove is formed in the impeller, a positioning cavity is formed in the lateral portion of the positioning groove, a positioning through hole is formed in the positioning cavity, the positioning block is inserted into the positioning through hole, the fixing screw hole is formed in the inner wall of the positioning cavity, and a fixing bolt sequentially penetrates through the fixing through hole, the positioning through hole and the settling through hole and then is matched with the fixing screw hole.

Compared with the prior art, the invention provides the direct-drive brushless motor isolation pump which is controlled by the controller, and the rotor and the electrons are respectively arranged in the first space and the second space which are separated, so that the internal circuit structure is effectively protected; the problem that the driving force and the driving space of the motor and the impeller are overlarge is solved, the size of the pump is reduced, and the cost is reduced; meanwhile, the stator is designed without tooth grooves, the structure is simple, the installation is convenient, the tooth groove torque of the motor is eliminated, the motor torque is more stable, the electromagnetic noise is obviously reduced, the performance and the reliability are improved, and the mass production performance is better.

Drawings

Fig. 1 is a structural view of a conventional brushless motor pump.

Fig. 2 is a schematic view of the magnetic circuit flow direction of a conventional brushless motor pump (arrows in the figure represent the magnetic field flow direction).

Fig. 3 is a schematic structural diagram of a direct-drive brushless motor isolated pump according to the present invention.

Fig. 4 is a schematic view of the magnetic circuit flow direction of the isolation pump of the direct-drive brushless motor according to the present invention (the arrow represents the magnetic field flow direction).

Fig. 5 is a schematic structural diagram of an iron core of a direct-drive brushless motor isolation pump according to the present invention.

Fig. 6 is a schematic view of a mounting manner of a magnet of a direct-drive brushless motor isolation pump according to the present invention.

Fig. 7 is a schematic diagram of a winding structure of a direct-drive brushless motor isolation pump according to the invention.

Fig. 8 is a schematic view of the installation structure of the installation part of the direct-drive brushless motor isolation pump (only including the impeller).

Fig. 9 is a schematic structural diagram of a mounting member and a magnet of a direct-drive brushless motor isolation pump according to the invention.

Fig. 10 is an enlarged schematic view of a portion a of fig. 9.

Fig. 11 is a schematic view of a partial structure of a positioning groove of a direct-drive brushless motor isolation pump according to the present invention.

Fig. 12 is an enlarged structural view of a portion B in fig. 11.

In the figure

A pump casing a1; an impeller a2; a front end cap a3; a pump head a4; a brushless motor assembly a5; a junction box a6; a circuit board a7; a heat conductive member a8; a volute 1; an inlet 2; an outlet 3; a pump body 4; a connecting bolt 5; a first space 6; a second space 7; a support shaft 8; an impeller 9; an annular mounting groove 10; a fixing screw hole 11; a positioning groove 12; a positioning cavity 13; a positioning through hole 14; a magnet 15; an arc-shaped strip 16; an insulating sleeve 17; a core 18; a winding 19; a controller 20; a fixing ring 21; a fixing through-hole 22; a fixing bolt 23; a blocking member 24; a connecting portion 25; a support portion 26; the mounting through-hole 27; a step 28; an elastic member 29; a positioning block 30; an arc-shaped chamfer 31.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the present invention.

As shown in fig. 3 to 7, a direct-drive brushless motor isolation pump includes a housing, an impeller 9, a magnet 15, an isolation sleeve 17, an iron core 18, a winding 19, a controller 20, and a mounting member, where the isolation sleeve 17 is disposed in the housing to divide the space inside the housing into a first space 6 and a second space 7, an inlet 2 and an outlet 3 are disposed on a side wall of the first space 6, a support shaft 8 is disposed in the first space 6, the impeller 9 is disposed on the support shaft 8, the magnet 15 is fixed on the impeller 9 by the mounting member, the magnet 15 is disposed around the support shaft 8, the iron core 18, the winding 19, and the controller 20 are disposed in the second space 7, the iron core 18 is annular, and a plane where the iron core 18 is disposed is perpendicular to the support shaft 8 and parallel to a plane where the magnet 15 is disposed, the winding 19 is flatly laid on a side surface of the iron core 18 close to the magnet 15, and the winding 19 is electrically connected to the controller 20.

The direct-drive brushless motor isolation pump of the embodiment is controlled by the controller 20, generates a rotating magnetic field through the rotation of the iron core 18 and the winding 19, drives the magnet 15 to rotate, and accordingly drives the impeller 9 to rotate, and effectively protects an internal circuit structure by arranging the rotor and the electrons in the first space 6 and the second space 7 which are separated from each other; the problem that the driving force and the driving space of the motor and the impeller 9 are overlarge is solved, the size of the pump is reduced, and the cost is reduced; meanwhile, the stator is designed without tooth grooves, the structure is simple, the installation is convenient, the tooth groove torque of the motor is eliminated, the motor torque is more stable, the electromagnetic noise is obviously reduced, the performance and the reliability are improved, and the mass production performance is better.

Specifically, the windings 19 are three-phase windings 19, and each set of windings 19 is formed by circumferential array, is flattened and is stacked together, so that the electromagnetic density of the motor can be effectively improved.

Further, the casing includes a volute 1, a pump body 4 and a connecting bolt 5, and the volute 1 and the pump body 4 are connected by the connecting bolt 5.

In order to realize strict isolation of the first space 6 and the second space 7, the direct-drive brushless motor isolation pump of the embodiment further comprises a sealing element, wherein the sealing element is arranged between the isolation sleeve 17 and the inner wall of the shell, and the iron core 18, the winding 19 and the controller 20 are isolated from the outside, so that a good waterproof and dustproof effect is achieved. Specifically, the sealing element is made of rubber material, and is essentially a sealing ring.

Further, the magnet 15 is annular, an annular mounting groove 10 is formed in the impeller 9, and the magnet 15 is arranged in the annular mounting groove 10.

As shown in fig. 5, the mounting member may be configured as an adhesive, or may be configured as an embedded structure, or may be configured as a fixing structure in the form of a bracket, in this embodiment, as shown in fig. 8 to 12, the mounting member includes a fixing ring 21 and a fixing bolt 23, the fixing ring 21 covers a gap between the magnet 15 and the side wall of the annular mounting groove 10, the fixing ring 21 is provided with a fixing through hole 22, the impeller 9 is provided with a fixing screw hole 11, the fixing bolt 23 is matched with the fixing screw hole 11 after passing through the fixing through hole 22, and the magnet 15 is fixed in the annular mounting groove 10 through the fixing ring 21.

In order to make magnet 15 can be more stably positioned in annular mounting groove 10, the lateral part of magnet 15 is equipped with a plurality of arcs 16, be equipped with on the lateral wall of annular mounting groove 10 with the arc that a plurality of arcs 16 correspond the setting, arc 16 with the arc cooperation. Under the structural arrangement, when the magnet 15 enters the annular mounting groove 10, the magnet 15 needs to rotate due to the matching of the arc-shaped strip 16 and the arc-shaped groove, and when the magnet 15 enters the preset mounting position due to expiration, the rotation of the magnet 15 is stopped, and under the structure, the matching of the arc-shaped strip 16 and the arc-shaped groove can generate a certain supporting force for the magnet 15, so that the magnet 15 is prevented from falling off randomly when being fixed, and an operator can conveniently vacate hands to mount the fixing bolt 23; meanwhile, after the installation is completed, the tightness of the structure can be effectively improved by the matching of the arc-shaped strip 16 and the arc-shaped groove, so that a better supporting effect on the magnet is realized, and the magnet 15 is prevented from being loosened in the working process.

Further, fixed ring 21 with magnet 15 fixed connection, be equipped with the screens piece 24 that a plurality of circumferences distribute on the fixed ring 21, screens piece 24 includes support, elastic component 29 and locating piece 30, the support includes connecting portion 25 and supporting part 26, connecting portion 25 one end is connected fixed ring 21, be equipped with arrangement through-hole 27 on the supporting part 26, be provided with step 28 on arrangement through-hole 27's the pore wall, elastic component 29 locates on the step 28, locating piece 30 sets up to the tubulose, the top edge of locating piece 30 is provided with arc chamfer 31, locating piece 30 inserts in arranging through-hole 27, and connect elastic component 29 is last to be provided with constant head tank 12 on the impeller 9, the lateral part of constant head tank 12 is equipped with location appearance chamber 13, be equipped with positioning hole 14 on location appearance chamber 13, positioning piece 30 inserts in positioning hole 14, fixed screw hole 11 is located on the inner wall in location appearance chamber 13, fixing bolt 23 passes in proper order behind fixing hole 22, positioning hole 14 and the through-hole 27, with fixed screw hole 11 cooperatees. Under the above structural arrangement, when the magnet 15 is installed, that is, the magnet 15 is inserted into the annular mounting groove 10, the magnet 15 needs to be rotated, so that the matching between the arc-shaped strip 16 and the arc-shaped groove is realized, in the process that the magnet 15 is inserted into the annular mounting groove 10 and is rotated, the clamping piece 24 gradually goes deep into the positioning groove 12 and rotates, the supporting part 26 gradually enters the positioning accommodating cavity 13 in the rotating process, the top of the positioning block 30 is squeezed by the positioning accommodating cavity 13, so that the elastic piece 29 is compressed, the positioning block 30 retracts into the accommodating through hole 27, after the positioning block 30 reaches the positioning through hole 14, due to the elastic force of the elastic piece 29, the positioning block 30 is inserted into the positioning through hole 14 to realize positioning, under the structure, the magnet 15 reaches the installation position thereof and cannot be moved any more, the primary positioning is realized, that automatic locking can be realized in the process of inserting the magnet 15, on one hand, the subsequent installation and operation processes can be facilitated, and on the other hand, the stability of the fixing structure of the magnet 15 can be improved.

The elastic member 29 is preferably provided as a spring.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" or "comprising 8230; \8230;" does not exclude additional elements from existing in a process, method, article, or terminal device that comprises the element. Further, in this document, "greater than," "less than," "more than," and the like are understood to not include the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.

The foregoing description of the embodiments is provided to facilitate an understanding and use of the invention and it will be apparent to those skilled in the art that various modifications to the embodiments and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (9)

1. The utility model provides a direct drive brushless motor isolating pump, its characterized in that, includes casing, impeller, magnet, separation sleeve, iron core, winding, controller and installed part, the separation sleeve is located will in the casing first space and second space are cut apart into to the inside space of casing, be equipped with import and export on the lateral wall in first space, be equipped with the back shaft in the first space, the impeller is located on the back shaft, magnet utilizes the installed part is fixed in on the impeller, magnet encircles the back shaft sets up, iron core, winding and controller are located in the second space, the iron core sets up to cyclic annular, its place plane perpendicular to the back shaft, and be on a parallel with magnet place plane, the winding lay flatly in the iron core is close to on a side of magnet, the winding with controller electric connection.

2. The isolated pump of claim 1, wherein the winding is a three-phase winding.

3. The direct drive brushless motor canned pump of claim 1, wherein the housing comprises a volute, a pump body, and a connecting bolt, the volute and the pump body being connected by the connecting bolt.

4. The isolated pump of claim 1, further comprising a seal disposed between the isolation sleeve and an inner wall of the housing.

5. The isolated pump of claim 4, wherein the sealing element is made of a rubber material.

6. The isolated pump of claim 1, wherein the magnet is disposed in a ring shape, the impeller is disposed with an annular mounting groove, and the magnet is disposed in the annular mounting groove.

7. The direct drive type brushless motor isolation pump according to claim 6, wherein the mounting member comprises a fixing ring and a fixing bolt, the fixing ring covers a gap between the magnet and the side wall of the annular mounting groove, the fixing ring is provided with a fixing through hole, the impeller is provided with a fixing screw hole, and the fixing bolt is matched with the fixing screw hole after penetrating through the fixing through hole.

8. The direct-drive brushless motor isolation pump according to claim 7, wherein the magnet has a plurality of arc-shaped bars at its side, and the annular mounting groove has arc-shaped grooves corresponding to the arc-shaped bars at its side wall, and the arc-shaped bars are engaged with the arc-shaped grooves.

9. The direct drive brushless motor isolation pump according to claim 8, wherein the fixing ring is fixedly connected with the magnet, the fixing ring is provided with a plurality of circumferentially distributed clamping elements, each clamping element comprises a support, an elastic element and a positioning block, the support comprises a connecting portion and a supporting portion, one end of the connecting portion is connected with the fixing ring, the supporting portion is provided with a placement through hole, a step is arranged on a hole wall of the placement through hole, the elastic element is arranged on the step, the positioning block is tubular, an arc-shaped chamfer is arranged at a top edge of the positioning block, the positioning block is inserted into the placement through hole and connected with the elastic element, the impeller is provided with a positioning groove, a positioning cavity is arranged at a side portion of the positioning groove, a positioning through hole is arranged on the positioning cavity, the positioning block is inserted into the positioning through hole, the fixing screw hole is arranged on an inner wall of the positioning cavity, and the fixing bolt is matched with the fixing screw hole after sequentially passing through the fixing through hole, the positioning through hole and the placement through hole.

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