CN114337120B - Brushless direct current motor for booster pump and booster pump - Google Patents
Brushless direct current motor for booster pump and booster pump Download PDFInfo
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- CN114337120B CN114337120B CN202210257653.2A CN202210257653A CN114337120B CN 114337120 B CN114337120 B CN 114337120B CN 202210257653 A CN202210257653 A CN 202210257653A CN 114337120 B CN114337120 B CN 114337120B
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Abstract
The application relates to a brushless direct current motor for a booster pump and the booster pump, wherein a rotor assembly is sleeved outside a rotating shaft and is used for driving the rotating shaft to rotate together; stator module is used for being fixed in the outside, and the drive plate is used for through control circuit with control stator module's magnetic field change on being fixed in stator module to the drive rotor subassembly rotates. According to the brushless direct current motor for the booster pump, the driving plate is adopted to replace a commutator and a carbon brush reversing structure of a traditional brush motor, and the structural design of the rotor assembly and the stator assembly is matched, so that the brushless direct current motor has the advantages of simple structure, long service life, low noise and high efficiency on one hand; on the other hand, the accurate control of current and voltage is facilitated through the driving plate, so that the rotating speed of the rotating shaft is accurately controlled, the rotor is prevented from demagnetizing, and the control of the boosting output is promoted; on the other hand, the structure of the rotor assembly and the structure of the stator assembly are simplified, the rotor machining process is relatively simplified, the product cost is reduced, and the installation and the use are convenient.
Description
Technical Field
The application relates to the field of booster pumps, in particular to a brushless direct current motor for a booster pump and a booster pump.
Background
The booster pump is installed on the pipeline to realize the pressure boost, and the wide application is in fields such as high-rise water supply, water heater, car, air conditioner, water purification, and current booster pump motor adopts direct current brush motor, and brush motor life-span is short, and the noise is big, and is inefficient, and current-voltage is uncontrollable, and the rotor processing technology is complicated.
Disclosure of Invention
Accordingly, there is a need for a brushless dc motor for a booster pump and a booster pump.
A brushless direct current motor for a booster pump comprises a rotating shaft assembly, a rotor assembly, a stator assembly and a driving plate;
the rotating shaft assembly comprises a rotating shaft, the rotor assembly is sleeved outside the rotating shaft, and the rotor assembly is used for driving the rotating shaft to rotate together;
the stator assembly is used for being fixed outside, the driving plate is fixed on the stator assembly, and the driving plate is used for controlling the magnetic field change of the stator assembly through a control circuit so as to drive the rotor assembly to rotate.
According to the brushless direct current motor for the booster pump, the driving plate is adopted to replace a commutator and a carbon brush reversing structure of a traditional brush motor, and the structural design of the rotor assembly and the stator assembly is matched, so that the brushless direct current motor has the advantages of simple structure, long service life, low noise and high efficiency on one hand; on the other hand, the accurate control of current and voltage is facilitated through the driving plate, so that the rotating speed of the rotating shaft is accurately controlled, the rotor is prevented from demagnetizing, and the control of the boosting output is promoted; on the other hand, the structure of the rotor assembly and the structure of the stator assembly are simplified, the rotor machining process is relatively simplified, the product cost is reduced, and the installation and the use are convenient.
In one embodiment, the stator assembly is sleeved outside the rotor assembly, and the rotor assembly is positioned between the rotating shaft and the stator assembly.
In one embodiment, the rotating shaft assembly further comprises a shaft sleeve, a first bearing and a second bearing;
the shaft sleeve and the second bearing are respectively sleeved outside the rotating shaft, and the rotor assembly and the stator assembly are jointly positioned between the shaft sleeve and the second bearing;
the first bearing is sleeved outside the shaft sleeve, and the shaft sleeve is positioned between the rotating shaft and the first bearing.
Further, in one embodiment, the rotating shaft assembly further includes an E-shaped ring sleeved outside the rotating shaft, the E-shaped ring is partially embedded in the rotating shaft, the E-shaped ring is located between the second bearing and the stator assembly, the E-shaped ring is disposed adjacent to the second bearing or abuts against the second bearing, and the E-shaped ring is used for limiting a distance between the second bearing and the stator assembly.
Further, in one embodiment, the rotating shaft defines a force-bearing plane, the force-bearing plane is used for mounting a pumping component of the booster pump, such as a reciprocating component or a rotating component, and the rotating component includes a diaphragm, an impeller, and the like.
Further, in one embodiment, the rotating shaft is provided with a clamping groove, and the E-shaped ring portion is embedded in the clamping groove.
In one embodiment, the rotor assembly comprises a rotor core and at least two magnet pieces;
the rotor core is sleeved outside the rotating shaft, the rotor core is provided with a first through groove and at least two mounting grooves, the rotating shaft penetrates through the first through groove, and each mounting groove is fixedly provided with one magnet piece.
Further, in one embodiment, the circumference of rotation of the magnet pieces is located within the circumference of rotation of the rotor core.
In one embodiment, the stator assembly comprises an insulating frame and a stator core, at least one of the insulating frame and the stator core is used for being fixed to the outside, and the driving plate is fixed on at least one of the insulating frame and the stator core;
and the insulating frame insulates and isolates each winding which is used for generating electromagnetic force and acts on the rotor assembly or the magnet piece of the rotor assembly on the stator core.
In one embodiment, the stator core comprises a core body and at least three winding columns which are connected, the winding columns protrude out of the core body towards the rotating shaft, and the winding columns are used for winding electric wires to form windings;
an avoidance groove is formed in the middle of each winding column, and the rotor assembly is located in the avoidance groove;
a slot for accommodating the electric wire and spacing the electric wire is formed between two adjacent winding columns, and the electric wire is at least partially positioned in the slot;
the insulating frame is provided with a frame body, at least three containing cavities and at least three spacing areas are formed in the frame body, and each spacing area is arranged between two adjacent containing cavities;
the frame body is integrally sleeved outside the winding columns, and each winding column and the winding formed by the winding column are located in the accommodating cavity so that the windings are mutually isolated through the frame body.
Further, in one of the embodiments, the stator core is adapted to be fixed to the outside; further, stator core in be equipped with the location installation department on the iron core body, the location installation department is used for the restriction stator core is fixed in outside mounted position.
Further, in one embodiment, the stator core is provided with a convex wide edge at the end of the winding column far away from the core body, and the convex wide edge is used for limiting the wire position of the winding.
Further, in one embodiment, a projection of the stator core on a radial plane of the rotating shaft completely covers a projection of the insulating frame on the radial plane of the rotating shaft.
Further, in one embodiment, the frame body is convexly provided with a first convex portion, a second convex portion and a third convex portion, the accommodating cavity is located between the first convex portion and the second convex portion, the third convex portion is located adjacent to the spacing area, and each convex portion includes the first convex portion, the second convex portion and the third convex portion, which are used for increasing the spacing distance to limit the abutting state of the stator core or the core body thereof, so as to ensure the insulating function of the frame body.
In one embodiment, the insulating frame is provided with at least two buckling ends, and the driving plate is buckled and fixed on each buckling end.
In one embodiment, the driving plate is provided with a plate body, and the plate body is provided with a second through groove and at least two buckling grooves;
the rotating shaft penetrates through the second through groove, and each buckling groove is fixed on one buckling end in a buckling mode;
the stator core is located in the projection of the radial plane of the rotating shaft, and the projection of the plate body located in the radial plane of the rotating shaft is completely covered.
In one embodiment, a booster pump comprises a pump head, a bracket, a casing and a brushless direct current motor for any one of the booster pump;
brushless DC motor for booster pump set up in the casing, the support mounting in on the casing, the pump head install in on the support, the output of pivot is connected the pumping part of booster pump.
In one embodiment, the pump head and the support form a fluid chamber therebetween;
the shell comprises a motor front cover, a shell and a motor rear cover, the motor front cover is fixed at one end of the shell, the motor rear cover is detachably arranged at the other end of the shell, and the bracket is arranged on the motor front cover;
the motor front cover is internally provided with a pump cavity for containing the pumping component and part of the rotating shaft, and the shell is internally provided with an inner cavity for containing the brushless direct current motor for the booster pump.
Further, in one embodiment, the pump head is provided with a water inlet end, a water outlet end and a body, wherein the water inlet end and the water outlet end are arranged on the body and are respectively communicated with the fluid chamber; the pump head is provided with at least two first mounting ports and a pressure relief port on the body, and the pressure relief port is used for being provided with a pressure relief valve to be automatically opened under the condition that the internal pressure of the fluid chamber exceeds a preset threshold value;
the bracket is provided with at least two second mounting ports, the motor front cover of the shell is provided with at least two third mounting ports, and each first mounting port, each second mounting port and each third mounting port are arranged in a one-to-one correspondence manner; the pump head reaches the support passes through first installing port, second installing port reaches the third installing port spiro union install in on the motor protecgulum.
Further, in one embodiment, the housing has a bracket mounting hole and/or an end cover positioning hole, the bracket mounting hole is used for providing temporary positioning for mounting the bracket, and the end cover positioning hole is used for providing temporary positioning for mounting the motor front cover and/or the motor rear cover.
Further, the motor rear cover is provided with a shaft hole, and a second bearing of the rotating shaft assembly is assembled in the shaft hole and used for matching and limiting the position of the rotating shaft; the motor rear cover is provided with a reinforcing cylinder at the periphery of the shaft hole, at least two reinforcing ribs extend out of the reinforcing cylinder, and the reinforcing cylinder and the reinforcing ribs are used for improving the structural strength of the motor rear cover at the position of the shaft hole in a matching manner; the motor rear cover is also provided with at least two fourth mounting ports for being screwed on the shell through the fourth mounting ports.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a brushless dc motor for a booster pump according to the present application.
Fig. 2 is another schematic view of the embodiment shown in fig. 1.
FIG. 3 is a schematic sectional view taken along the line A-A of the embodiment shown in FIG. 2.
Fig. 4 is another schematic view of the embodiment of fig. 2.
Fig. 5 is an exploded view of the embodiment shown in fig. 4.
Fig. 6 is another schematic view of the embodiment shown in fig. 5.
Fig. 7 is a partial structural schematic diagram of another embodiment of the brushless dc motor for a booster pump according to the present application.
Fig. 8 is an exploded view of a portion of the embodiment shown in fig. 7.
Fig. 9 is a schematic assembly view of the structure of the embodiment shown in fig. 8.
FIG. 10 is a schematic structural diagram of an embodiment of the booster pump according to the present application.
Fig. 11 is another schematic view of the embodiment of fig. 10.
FIG. 12 is a schematic cross-sectional view along the direction B-B of the embodiment shown in FIG. 11.
Fig. 13 is another schematic view of the embodiment of fig. 11.
FIG. 14 is a schematic cross-sectional view in the direction C-C of the embodiment shown in FIG. 13.
Fig. 15 is another schematic view of the embodiment of fig. 13.
Fig. 16 is another schematic view of the embodiment of fig. 15.
Fig. 17 is an exploded view of the embodiment of fig. 16.
Fig. 18 is another schematic view of the embodiment of fig. 17.
Fig. 19 is another schematic view of the embodiment of fig. 18.
Fig. 20 is another schematic view of the embodiment of fig. 19.
Fig. 21 is another schematic view of the embodiment of fig. 20.
Fig. 22 is another schematic view of the embodiment of fig. 21.
Fig. 23 is another schematic view of the embodiment of fig. 22.
Reference numerals are as follows:
a pump head 100, a bracket 200, a cabinet 300, a rotational shaft assembly 400, a rotor assembly 500, a stator assembly 600, a driving plate 700, a fluid chamber 800;
the water inlet end 110, the water outlet end 120, the body 130, the first mounting port 140, the pressure relief port 150, the second mounting port 210, and the water inlet and outlet area 220;
a motor front cover 310, a housing 320, a motor rear cover 330;
the pump body cavity 311, the third mounting port 312, the bracket assembly hole 321, the end cover positioning hole 322, the inner cavity 323, the shaft hole 331, the reinforcing cylinder 332, the reinforcing rib 333 and the fourth mounting port 334;
the structure comprises a rotating shaft 410, a shaft sleeve 420, a first bearing 430, a second bearing 440, an E-shaped ring 450, a stress plane 411 and a clamping groove 412;
a rotor core 510, a magnet piece 520, a first through groove 511, and a mounting groove 512;
the stator comprises an insulating frame 610, a stator core 620, a fastening end 611, a frame body 612, a first convex part 613, a spacer 614, a containing cavity 615, a second convex part 616 and a third convex part 617;
the iron core body 621, the avoiding groove 622, the winding column 623, the slot 624, the positioning installation part 625 and the convex wide edge 626;
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of this application, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The application discloses a brushless direct current motor for a booster pump, which comprises a partial structure or a whole structure of the following embodiments; that is, the brushless dc motor for a booster pump includes some or all of the following technical features. In one embodiment of the application, the brushless direct current motor for the booster pump comprises a rotating shaft assembly, a rotor assembly, a stator assembly and a driving plate; the rotating shaft assembly comprises a rotating shaft, the rotor assembly is sleeved outside the rotating shaft, and the rotor assembly is used for driving the rotating shaft to rotate together; the stator assembly is used for being fixed to the outside, the driving plate is fixed to the stator assembly, and the driving plate is used for controlling the magnetic field change of the stator assembly through a control circuit, so that the rotor assembly is driven to rotate. According to the brushless direct current motor for the booster pump, the driving plate is adopted to replace a commutator and a carbon brush reversing structure of a traditional brush motor, and the structural design of the rotor assembly and the stator assembly is matched, so that the brushless direct current motor has the advantages of simple structure, long service life, low noise and high efficiency on one hand; on the other hand, the accurate control of current and voltage is facilitated through the driving plate, so that the rotating speed of the rotating shaft is accurately controlled, the rotor is prevented from demagnetizing, and the control of the boosting output is promoted; on the other hand, the structure of the rotor assembly and the stator assembly is simplified, the processing technology of the rotor is relatively simplified, the product cost is reduced, and the installation and the use are convenient.
In one embodiment, a brushless dc motor for a booster pump is shown in fig. 1, and includes a rotating shaft assembly 400, a rotor assembly 500, a stator assembly 600, and a driving plate 700; the rotating shaft assembly 400 includes a rotating shaft 410, the rotor assembly 500 is sleeved outside the rotating shaft 410, and the rotor assembly 500 is used for driving the rotating shaft 410 to rotate together; the stator assembly 600 is fixed to the outside, the driving plate 700 is fixed to the stator assembly 600, and the driving plate 700 is used for controlling the magnetic field variation of the stator assembly 600 through a control circuit, so as to drive the rotor assembly 500 to rotate. Therefore, only the driving plate 700 needs to be controlled to control the current of the stator assembly 600, and the magnetic field variation of the rotor assembly 500 is controlled, because the stator assembly 600 is fixed outside, the rotor assembly 500 rotates relative to the stator assembly 600, so as to drive the rotating shaft 410 to rotate together, and further, in one embodiment, the rotor assembly 500 drives the rotating shaft 410 to rotate coaxially and have the same angular velocity. In one embodiment, the stator assembly 600 is sleeved outside the rotor assembly 500, and the rotor assembly 500 is located between the rotating shaft 410 and the stator assembly 600.
The booster pump can be divided into a reciprocating pump and a rotary pump according to different motion modes of the moving part; the pump can be divided into a piston pump and a plunger pump according to different structures of moving parts, and can also be divided into a gear pump, a screw pump, a vane pump, a water ring pump and the like; the brushless direct current motor for the booster pump is applicable to various booster pumps adopting motors. Further, in one embodiment, as shown in fig. 2, the rotating shaft 410 is provided with a force bearing plane 411, the force bearing plane 411 is used for mounting pumping components of the booster pump, such as a reciprocating assembly or a rotating assembly and the like, and the rotating assembly comprises a diaphragm, an impeller and the like; referring to fig. 20, the force-bearing plane 411 may serve as an output end of the rotating shaft 410, and is used for providing a circumferential force, i.e., a motive force, so as to drive the pumping component to move, including reciprocating and rotating. In one embodiment, referring to fig. 3 and 4, the insulation frame 610 has at least two fastening ends 611, and the driving plate 700 is fastened to each fastening end 611. Such a design facilitates rapid assembly of the drive plate 700.
In one embodiment, referring to fig. 3 and 4, the rotating shaft assembly 400 further includes a shaft sleeve 420, a first bearing 430 and a second bearing 440; the shaft sleeve 420 and the second bearing 440 are respectively sleeved outside the rotating shaft 410, and the rotor assembly 500 and the stator assembly 600 are jointly located between the shaft sleeve 420 and the second bearing 440; the first bearing 430 is sleeved outside the shaft sleeve 420, and the shaft sleeve 420 is located between the rotating shaft 410 and the first bearing 430. Further, referring to fig. 2, in the present embodiment, the rotating shaft assembly 400 further includes an E-shaped ring 450 sleeved outside the rotating shaft 410, the E-shaped ring 450 is partially embedded in the rotating shaft 410, the E-shaped ring 450 is located between the second bearing 440 and the stator assembly 600, the E-shaped ring 450 is disposed adjacent to the second bearing 440 or abutted against the second bearing 440, and the E-shaped ring 450 is used for limiting a distance between the second bearing 440 and the stator assembly 600. Further, in one embodiment, as shown in fig. 5 and fig. 19, the rotating shaft 410 is provided with a locking groove 412, and in combination with fig. 3, the E-shaped ring 450 is partially embedded in the locking groove 412. Such a design is advantageous to accurately define the position of the second bearing 440 and avoid relative displacement thereof.
In one embodiment, referring to fig. 3 and 5, the rotor assembly 500 includes a rotor core 510 and at least two magnet pieces 520; the rotor core 510 is sleeved outside the rotating shaft 410, the rotor core 510 is provided with a first through groove 511 and at least two mounting grooves 512, the rotating shaft 410 penetrates through the first through groove 511, and each mounting groove 512 is fixedly provided with one magnet piece 520. Further, in one embodiment, the number of the magnet pieces 520 is 6, 8, or 10 pieces. Further, in one embodiment, the rotation circumference of the magnet piece 520 is located within the rotation circumference of the rotor core 510, that is, the projection of the rotor core 510 on the radial plane of the rotating shaft 410 completely covers the projection of the magnet piece 520 on the radial plane of the rotating shaft 410, wherein the radial plane is a plane perpendicular to the extending direction of the rotating shaft 410, that is, the axial direction. Further, in one embodiment, the rotor assembly 500 is integrally formed as a cylinder, that is, the rotor core 510 and the magnet pieces 520 are integrally formed as a cylinder, which can also be understood as a cylinder with a position of the rotation shaft 410 being set aside, so that the rotor assembly 500 forms a full-circle core similar to a cylinder with respect to the stator assembly 600, thereby ensuring the consistency of the air gap between the rotor and the stator. By the design, on one hand, the cogging torque of the motor is reduced, the use amount and cost of the ferrite magnet are reduced, and the efficiency of the motor is improved; on the other hand, it is beneficial to ensure that the magnet piece 520 is always located in the rotor core 510 when the rotor assembly 500 rotates, so as to prevent the rotor core 510 from scraping against the stator assembly 600 in a high-speed rotation state, and further ensure the design life of the brushless dc motor for the booster pump; and the cooperation drive plate replaces commutator and carbon brush switching-over, simple structure, and longe-lived, the noise is low, and is efficient, still can embed limiting function such as overcurrent protection, overvoltage, undervoltage protection and excess temperature protection in the drive plate, can effective control electric current size, prevents rotor demagnetization, effectively protects the motor, increases motor life, improves motor efficiency, reduces vibration noise.
In one embodiment, referring to fig. 4 and 5, the stator assembly 600 includes an insulating frame 610 and a stator core 620, at least one of the insulating frame 610 and the stator core 620 is used for being fixed to the outside, and the driving plate 700 is fixed on at least one of the insulating frame 610 and the stator core 620; referring to fig. 8 and 9, the insulating frame 610 insulates and separates the respective windings of the stator core 620, which are used for generating electromagnetic force and act on the rotor assembly 500 or the magnet pieces 520 thereof. The winding on the stator is also called stator winding, i.e. the electric wire wound on the stator is usually copper wire, in this embodiment, the winding is wound on the stator core 620, and the winding is a general term for a plurality of coils or coil groups to form a phase or an entire electromagnetic circuit. The windings are not shown in the figure for simplicity of illustration. In one embodiment, as shown in fig. 6, the stator core 620 includes a core 621 and at least three winding posts 623 connected to each other, the winding posts 623 protrude from the core 621 toward the rotating shaft 410, and the winding posts 623 are used for winding wires to form the windings; that is, in this embodiment, the winding is wound around the winding post 623. Referring to fig. 7, an avoiding groove 622 is formed in the middle of each winding post 623, and the rotor assembly 500 is located in the avoiding groove 622; a slot 624 is formed between two adjacent winding columns 623, the slot 624 is used for accommodating the electric wire and spacing the electric wire, and the electric wire is at least partially positioned in the slot 624, namely, the slot 624 is formed between two adjacent winding columns 623; with reference to fig. 8 and 9, the insulating frame 610 has a frame 612, and at least three accommodating cavities 615 and at least three spacers 614 are formed in the frame 612, and each spacer 614 is disposed between two adjacent accommodating cavities 615; the frame body 612 is integrally sleeved outside the winding posts 623, and each winding post 623 and the winding formed by the winding post 623 are located in the accommodating cavity 615, so that the windings are isolated from each other through the frame body 612. Due to the design, a plurality of electromagnetic induction structural members, specifically, a winding mode, an electric control mode, an electromagnetic induction principle and the like are formed on the stator assembly 600, and the electromagnetic induction structural members are realized by referring to the conventional technology, and the embodiments of the present application only adopt the technologies.
Further, in one of the embodiments, the stator core 620 is for being fixed to the outside; further, as shown in fig. 6, the stator core 620 is provided with a positioning and mounting portion 625 on the core body 621, and the positioning and mounting portion 625 is used for limiting the mounting position of the stator core 620 fixed to the outside. In this embodiment, the positioning and mounting portion 625 is a groove, and in other embodiments, the positioning and mounting portion 625 is a convex strip or other structures. Further, in one embodiment, the projection of the stator core 620 on the radial plane of the rotating shaft 410 completely covers the projection of the insulating frame 610 on the radial plane of the rotating shaft 410. Further, in one embodiment, as shown in fig. 6, the stator core 620 is provided with a protruding wide edge 626 at the end of the winding column 623 far from the core body 621, and the protruding wide edge 626 is used for limiting the wire position of the winding. Due to the design, on one hand, the stator core 620 and the whole stator assembly 600 are positioned and installed quickly, and the fool-proof design is realized; on the other hand, the stator assembly 600 is stably installed, and the installation structure is simplified; on the other hand, the convex wide edge 626 is matched with the accommodating cavity 615 of the insulating frame 610, so that the phenomenon that the electric wire of the winding protrudes to influence the insulating effect and further the damage caused by accidents is avoided.
Further, in one embodiment, as shown in fig. 6 and 7, the frame body 612 is convexly provided with a first protrusion 613, a second protrusion 616 and a third protrusion 617, the receiving cavity 615 is located between the first protrusion 613 and the second protrusion 616, the third protrusion 617 is disposed adjacent to the spacing area 614, and each protrusion, including the first protrusion 613, the second protrusion 616 and the third protrusion 617, is used for increasing a spacing distance to limit an abutting state of the stator core 620 or the core body 621 thereof, so as to ensure an insulating function of the frame body 612. Due to such a design, it is beneficial to ensure that after the stator assembly 600 is installed, the stator core 620 or the core 621 of the stator assembly 600 affects the insulation effect due to vibration during the operation of the booster pump, and during the long-term operation of the booster pump, some assembly failures are inevitable, and at this time, due to the existence of the first protruding portion 613, the second protruding portion 616 and the third protruding portion 617, it is beneficial to avoid the conductive contact in the axial direction of the rotating shaft 410, so as to ensure the design life of the brushless dc motor for the booster pump.
In one embodiment, as shown in fig. 6 and 22, the driving plate 700 has a plate body 710, and the plate body 710 has a second through groove 720 and at least two fastening grooves 730; with reference to fig. 3 and fig. 4, the rotating shaft 410 passes through the second through groove 720, and each of the fastening grooves 730 is fastened and fixed on one of the fastening ends 611; the projection of the stator core 620 on the radial plane of the rotating shaft 410 completely covers the projection of the plate 710 on the radial plane of the rotating shaft 410. Further, in one embodiment, the board body 710 of the driving board 700 is provided with an overcurrent protection module, an overvoltage protection module, an undervoltage protection module and an over-temperature protection module, which are respectively used for implementing the limiting functions of overcurrent protection, overvoltage protection, undervoltage protection, over-temperature protection and the like; further, in one embodiment, the driving board 700 further includes a sensorless field-oriented control, an FOC module and/or a sine wave control module on the board body 710, the sensorless FOC may also be referred to as a FOC position-less sensor, and the brushless dc motor for the boost pump does not need to be provided with any sensor, in which case, the position information of the rotor assembly 500 cannot be obtained simply by reading the measured values of the sensor, and the position information of the rotor assembly 500 needs to be calculated by collecting the phase current of the motor and using a position estimation algorithm. Due to the design, on one hand, the risk of out-of-control caused by the failure of the sensor is avoided, on the other hand, the use and the cost of the sensor are saved, on the other hand, the wiring between the stator assembly 600 and the driving plate 700 is simplified, and the driving plate 700 is integrated in the brushless direct current motor for the booster pump and is integrated with the motor, so that the motor is favorably reduced in size and cost and convenient to install and use; in practical application, adopt above-mentioned structure, the drive plate is placed in motor back shroud side, becomes an organic whole with the motor, reduces the motor volume, reduce cost, the installation of being convenient for is used.
In one embodiment, a booster pump is shown in fig. 10, which includes a pump head 100, a support frame 200, a housing 300, and a brushless dc motor for the booster pump according to any one of the embodiments; brushless DC motor for booster pump set up in casing 300, support 200 install in on the casing 300, pump head 100 install in on the support 200, the output of pivot 410 is connected the pumping member of booster pump. According to the design, the driving plate is adopted to replace a commutator and a carbon brush reversing structure of the traditional brush motor, and the structural design of the rotor assembly and the stator assembly is matched, so that the motor has the advantages of simple structure, long service life, low noise and high efficiency on one hand; on the other hand, the accurate control of current and voltage is facilitated through the driving plate, so that the rotating speed of the rotating shaft is accurately controlled, the rotor is prevented from demagnetizing, and the control of the boosting output is promoted; on the other hand, the structure of the rotor assembly and the stator assembly is simplified, the processing technology of the rotor is relatively simplified, the product cost is reduced, and the installation and the use are convenient.
In one embodiment, with reference to fig. 11 and 12, a fluid chamber 800 is formed between the pump head 100 and the support frame 200; the housing 300 includes a motor front cover 310, a housing 320, and a motor rear cover 330, the motor front cover 310 is fixed to one end of the housing 320, the motor rear cover 330 is detachably mounted to the other end of the housing 320, and the bracket 200 is mounted on the motor front cover 310; referring to fig. 13 and 14, a pump chamber 311 is formed in the front motor cover 310 to accommodate the pumping member and a portion of the rotating shaft 410, and referring to fig. 21, an inner cavity 323 is formed in the housing 320 to accommodate the brushless dc motor for the booster pump. It will be appreciated that for simplicity of illustration, pumping components such as diaphragms or impellers are not shown, nor are some of the components such as check valves and seals, etc., but those skilled in the art will appreciate the true existence and specific application of such components or components in the booster pump.
During assembly, the rotating shaft 410 is located at the center of the rotor assembly 500, and the rotor core 510 is fixedly connected to the rotating shaft 410. For example, 10 ferrite magnets are inserted into 10 mounting grooves 512 of the rotor core as 10 magnet pieces 520, and then fixed by glue or by fastening, and the two bearings at the two ends of the rotating shaft 410, including the first bearing 430 and the second bearing 440, are respectively connected to the motor back cover 330 and the pumping part of the motor front cover 310 or the pump head 100. The stator core 620 is pressed into the casing 300 or its housing 320 and fixed with an interference fit.
Further, in one embodiment, referring to fig. 15 and 16, the pump head 100 is provided with a water inlet end 110, a water outlet end 120 and a body 130, wherein the water inlet end 110 and the water outlet end 120 are disposed on the body 130 and respectively communicate with the fluid chamber 800; the pump head 100 is provided with at least two first mounting ports 140 and a pressure relief port 150 in the body 130, and the pressure relief port 150 is used for being provided with a pressure relief valve to automatically open when the internal pressure of the fluid chamber 800 exceeds a preset threshold; in the figure, the pressure relief valve is not shown for simplifying the structure, and for a booster pump actually sold and used, the pressure relief valve may be equipped, which should not be regarded as a limitation to each related embodiment of the present application, and so on for the other embodiments, and details are not described.
Further, in one embodiment, as shown in fig. 14, the bracket 200 is provided with at least two second mounting holes 210, and the motor front cover 310 of the casing 300 is provided with at least two third mounting holes 312, and referring to fig. 17 and 18, each of the first mounting holes 140, each of the second mounting holes 210 and each of the third mounting holes 312 are arranged in a one-to-one correspondence; the pump head 100 and the bracket 200 are threadedly mounted on the motor front cover 310 through the first mounting hole 140, the second mounting hole 210, and the third mounting hole 312. Such a design facilitates a secure assembly of the pump head 100, the bracket 200, and the motor front cover 310.
Further, in one embodiment, as shown in fig. 14 and 15, the motor rear cover 330 is provided with a shaft hole 331, and the second bearing 440 of the rotating shaft assembly 400 is assembled in the shaft hole 331 for cooperatively defining the position of the rotating shaft 410; the motor rear cover 330 is provided with a reinforcing cylinder 332 at the periphery of the shaft hole 331, and at least two reinforcing ribs 333 extending outside the reinforcing cylinder 332, wherein the reinforcing cylinder 332 and the reinforcing ribs 333 are used for improving the structural strength of the motor rear cover 330 at the position of the shaft hole 331 in a matching manner; the motor rear cover 330 is further provided with at least two fourth mounting holes 334, and the fourth mounting holes 334 are used for being screwed on the shell 320. Due to the design, on one hand, the motor rear cover 330 is convenient to disassemble and assemble so as to maintain the brushless direct current motor for the booster pump; on the other hand, the structural strength of the motor rear cover 330 at the contact position of the second bearing 440 and the motor rear cover 330 is enhanced, and the normal use of the product design is ensured.
Further, in one embodiment, as shown in fig. 16 and 17, a bracket mounting hole 321 and/or an end cover positioning hole 322 are formed on the housing 320, the bracket mounting hole 321 is used for providing temporary positioning for mounting the bracket 200, and the end cover positioning hole 322 is used for providing temporary positioning for mounting the motor front cover 310 and/or the motor rear cover 330. Such a design is beneficial to matching with the production process and accurately positioning and assembling the bracket 200, the motor front cover 310 and the motor rear cover 330.
In one embodiment, as shown in fig. 19 and 20, the motor front cover 310 is mounted at one end of the housing 320, and the motor rear cover 330 is mounted at the other end of the housing 320; in this embodiment, the front motor cover 310 is assembled to one end of the housing 320 in an interference fit manner, and the rear motor cover 330 is detachably assembled to the other end of the housing 320 in a screw connection manner. Further, referring to fig. 21, 22 and 23, the bracket 200 is provided with at least two water inlet and outlet areas 220 for matching with a check valve, a sealing sheet and the like, so as to realize the separation between the fluid chamber 800 and the pump body cavity 311, the fluid in the fluid chamber 800 entering the pump body cavity 311, and the fluid in the pump body cavity 311 entering the fluid chamber 800, thereby realizing the pressurized output.
In other embodiments of the present invention, a brushless dc motor for a booster pump and a booster pump, which are formed by combining technical features of the above embodiments, can be implemented.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A brushless direct current motor for a booster pump is characterized by comprising a rotating shaft component (400), a rotor component (500), a stator component (600) and a driving plate (700);
the rotating shaft assembly (400) comprises a rotating shaft (410), the rotor assembly (500) is sleeved outside the rotating shaft (410), and the rotor assembly (500) is used for driving the rotating shaft (410) to rotate together;
the stator assembly (600) is used for being fixed to the outside, the driving plate (700) is fixed to the stator assembly (600), and the driving plate (700) is used for controlling the magnetic field change of the stator assembly (600) through a control circuit so as to drive the rotor assembly (500) to rotate;
the stator assembly (600) comprises an insulation frame (610) and a stator core (620), at least one of the insulation frame (610) and the stator core (620) is used for being fixed to the outside, and the driving plate (700) is fixed on at least one of the insulation frame (610) and the stator core (620); the insulation frame (610) insulates and isolates each winding on the stator core (620) for generating electromagnetic force and acting on the rotor assembly (500) or the magnet piece (520) thereof;
the stator core (620) comprises a core body (621) and at least three winding columns (623), the winding columns (623) protrude out of the core body (621) towards the rotating shaft (410), and the winding columns (623) are used for winding electric wires to form windings; an avoiding groove (622) is formed in the middle of each winding column (623), and the rotor assembly (500) is located in the avoiding groove (622); a slot (624) for accommodating the electric wire and spacing the electric wire is formed between two adjacent winding columns (623), and the electric wire is at least partially positioned in the slot (624); the insulating frame (610) is provided with a frame body (612), at least three accommodating cavities (615) and at least three spacing areas (614) are formed in the frame body (612), and each spacing area (614) is arranged between two adjacent accommodating cavities (615); the frame body (612) is integrally sleeved outside the winding columns (623), and each winding column (623) and the winding formed by the winding column (623) are positioned in the accommodating cavity (615) so that the windings are mutually isolated through the frame body (612);
the stator core (620) is provided with a convex wide edge (626) at the end of the winding column (623) far away from the core body (621), and the convex wide edge (626) is used for limiting the position of an electric wire of the winding;
the frame body (612) is convexly provided with a first convex part (613), a second convex part (616) and a third convex part (617), the accommodating cavity (615) is positioned between the first convex part (613) and the second convex part (616), the third convex part (617) is arranged adjacent to the spacing area (614), and the first convex part (613), the second convex part (616) and the third convex part (617) are used for increasing the spacing distance to limit the abutting state of the stator core (620) or the core body (621) thereof so as to ensure the insulating effect of the frame body (612).
2. The brushless dc motor for a turbo pump according to claim 1, wherein the stator assembly (600) is sleeved outside the rotor assembly (500), and the rotor assembly (500) is located between the rotating shaft (410) and the stator assembly (600).
3. The brushless dc motor for a turbo pump according to claim 1, wherein the rotation shaft assembly (400) further includes a bushing (420), a first bearing (430), and a second bearing (440);
the shaft sleeve (420) and the second bearing (440) are respectively sleeved outside the rotating shaft (410), and the rotor assembly (500) and the stator assembly (600) are jointly positioned between the shaft sleeve (420) and the second bearing (440);
the first bearing (430) is sleeved outside the shaft sleeve (420), and the shaft sleeve (420) is located between the rotating shaft (410) and the first bearing (430).
4. The brushless dc motor for a turbo pump according to claim 1, wherein the rotor assembly (500) comprises a rotor core (510) and at least two magnet pieces (520);
the rotor core (510) is sleeved outside the rotating shaft (410), the rotor core (510) is provided with a first through groove (511) and at least two mounting grooves (512), the rotating shaft (410) penetrates through the first through groove (511), and each mounting groove (512) is fixedly provided with one magnet piece (520).
5. The brushless dc motor for a turbo pump according to claim 1, wherein the driving plate (700) has an overcurrent protection module, an overvoltage protection module, an undervoltage protection module, an overtemperature protection module, a sensorless magnetic field guidance control module, and/or a sine wave control module on a plate body (710) thereof.
6. The brushless dc motor for a turbo pump according to claim 3, wherein the rotating shaft assembly (400) further includes an E-shaped ring (450) sleeved outside the rotating shaft (410), and the E-shaped ring (450) is partially embedded in the rotating shaft (410), the E-shaped ring (450) is located between the second bearing (440) and the stator assembly (600), the E-shaped ring (450) is disposed adjacent to the second bearing (440) or abuts against the second bearing (440), and the E-shaped ring (450) is used for limiting a distance of the second bearing (440) relative to the stator assembly (600); the rotating shaft (410) is provided with a clamping groove (412), and the E-shaped ring (450) is partially embedded in the clamping groove (412).
7. The brushless dc motor for a turbo pump according to claim 1, wherein the insulation frame (610) has at least two fastening ends (611), and the driving plate (700) is fastened to each of the fastening ends (611).
8. The brushless dc motor for a turbo pump according to claim 7, wherein the driving plate (700) has a plate body (710), and the plate body (710) has a second through-slot (720) and at least two fastening slots (730);
the rotating shaft (410) penetrates through the second through groove (720), and each buckling groove (730) is fixed on one buckling end (611) in a buckling mode;
the projection of the stator core (620) on the radial plane of the rotating shaft (410) completely covers the projection of the plate body (710) on the radial plane of the rotating shaft (410).
9. A booster pump, comprising a pump head (100), a stand (200), a housing (300) and a brushless dc motor for a booster pump according to any one of claims 1 to 8;
the brushless direct current motor for the booster pump is arranged in the machine shell (300), the support (200) is arranged on the machine shell (300), the pump head (100) is arranged on the support (200), and the output part of the rotating shaft (410) is connected with a pumping part of the booster pump;
a fluid chamber (800) is formed between the pump head (100) and the bracket (200); the casing (300) comprises a motor front cover (310), a shell (320) and a motor rear cover (330), the motor front cover (310) is fixed at one end of the shell (320), the motor rear cover (330) is detachably mounted at the other end of the shell (320), and the bracket (200) is mounted on the motor front cover (310); a pump body cavity (311) is formed inside the motor front cover (310) to accommodate the pumping component and a part of the rotating shaft (410), and an inner cavity (323) is formed inside the shell (320) to accommodate the brushless direct current motor for the booster pump;
the pump head (100) is provided with a water inlet end (110), a water outlet end (120) and a body (130), wherein the water inlet end (110) and the water outlet end (120) are arranged on the body (130) and are respectively communicated with the fluid chamber (800); the pump head (100) is provided with at least two first mounting ports (140) and a pressure relief port (150) in the body (130), and the pressure relief port (150) is used for being provided with a pressure relief valve to be automatically opened when the internal pressure of the fluid chamber (800) exceeds a preset threshold value;
the bracket (200) is provided with at least two second mounting ports (210), the motor front cover (310) of the machine shell (300) is provided with at least two third mounting ports (312), and each first mounting port (140), each second mounting port (210) and each third mounting port (312) are arranged in a one-to-one correspondence manner; the pump head (100) and the bracket (200) are installed on the motor front cover (310) through the first installation port (140), the second installation port (210) and the third installation port (312) in a threaded manner;
the motor rear cover (330) is provided with a shaft hole (331), and a second bearing (440) of the rotating shaft assembly (400) is assembled in the shaft hole (331) and is used for matching and limiting the position of the rotating shaft (410); the motor rear cover (330) is provided with a reinforcing cylinder (332) at the periphery of the shaft hole (331), at least two reinforcing ribs (333) are arranged outside the reinforcing cylinder (332), and the reinforcing cylinder (332) and the reinforcing ribs (333) are used for improving the structural strength of the motor rear cover (330) at the position of the shaft hole (331) in a matching manner; the motor rear cover (330) is further provided with at least two fourth mounting ports (334) which are used for being screwed on the shell (320) through the fourth mounting ports (334).
10. The booster pump according to claim 9, wherein the casing (320) defines a bracket mounting hole (321) and/or an end cover positioning hole (322), the bracket mounting hole (321) is used for providing temporary positioning to mount the bracket (200), and the end cover positioning hole (322) is used for providing temporary positioning to mount the motor front cover (310) and/or the motor rear cover (330).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210257653.2A CN114337120B (en) | 2022-03-16 | 2022-03-16 | Brushless direct current motor for booster pump and booster pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210257653.2A CN114337120B (en) | 2022-03-16 | 2022-03-16 | Brushless direct current motor for booster pump and booster pump |
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| Publication Number | Publication Date |
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| CN114337120A CN114337120A (en) | 2022-04-12 |
| CN114337120B true CN114337120B (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210257653.2A Active CN114337120B (en) | 2022-03-16 | 2022-03-16 | Brushless direct current motor for booster pump and booster pump |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114337120A (en) | 2022-04-12 |
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