CN111835173A

CN111835173A - RO pump of outer rotor brushless motor

Info

Publication number: CN111835173A
Application number: CN201910298918.1A
Authority: CN
Inventors: 叶斌海; 孙铭
Original assignee: Ningbo Lijia Qingshi Electric Technology Co ltd
Current assignee: Ningbo Lijia Qingshi Electric Technology Co ltd
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2020-10-27

Abstract

The invention discloses an outer rotor brushless motor RO pump, which comprises a pump body and a driving motor which are mutually connected, wherein the driving motor is used for driving the pump body to run, the driving motor comprises a stator component which is fixedly arranged and a rotor component which is arranged around the stator component, and the rotor component and the stator component are mutually excited, and the invention has the beneficial effects that: the outer rotor type motor has high operation efficiency, large output torque and high complete machine operation efficiency of the RO pump; the volume of the RO pump is smaller than that of the traditional RO pump, and the RO pump is convenient to install and set.

Description

RO pump of outer rotor brushless motor

Technical Field

The invention relates to an RO pump, in particular to an RO pump of an outer rotor brushless motor.

Background

The RO pump is also called RO booster pump, RO diaphragm pump, reverse osmosis booster pump, is the key part in the reverse osmosis water purifier, provides the required stable water pressure of its work and discharge for another important part RO membrane in the RO water purifier to realize the purpose of RO water purifier output pure water.

In the prior art, the drive motor in the RO pump needs to obtain enough torque force to achieve the purpose, usually, the motor is enlarged, but the RO pump is inconvenient to be installed in the water purifier due to the overlarge motor.

Disclosure of Invention

In order to overcome the defects, the invention provides the RO pump of the outer rotor brushless motor, which can increase the motor torque force under the condition of not increasing the size of the motor, and has the advantages of more compact overall structure and longer service life.

In order to achieve the purpose, the invention is realized by the following technical scheme: the outer rotor brushless motor RO pump comprises a pump body and a driving motor which are connected with each other; the driving motor is provided with a motor shell and a front end cover used for closing the motor shell, and the motor shell and the front end cover jointly define a motor cavity; the stator frame is fixedly connected to the front end cover and faces the interior of the motor cavity, the interior of the motor cavity comprises a stator assembly fixedly connected to the stator frame and a rotor assembly arranged on the circumference of the stator assembly in a surrounding mode, and the rotor assembly and the stator assembly are mutually excited; the stator assembly comprises a stator core and a coil wound on the stator core, and the rotor assembly comprises a rotor shell and a magnetic ring fixedly connected to the inner side wall of the rotor shell; an output shaft of the motor penetrates through a shaft tube of the stator frame, and one end of the output shaft of the motor is fixedly connected with the rotor shell; the center of the front end cover is provided with a through hole, and the other end of the output shaft penetrates out of the through hole and is sleeved with an eccentric wheel at the tail end. The outer rotor type motor has higher operation efficiency, lower operation noise and longer service life.

In the technical scheme, the stator frame is provided with more than three screw holes along the circumferential direction, the front end cover is provided with end cover screw holes corresponding to the screw holes, a circuit board used for controlling the driving motor is sleeved on the circumference of the stator frame, a through hole is formed in the circuit board, and a limiting bolt penetrates through the through hole and is connected to the end cover screw holes. The stator frame is connected to the front end cover in a detachable mode, and installation is facilitated.

In the technical scheme, a wiring sleeve made of flexible materials is clamped between the front end cover and the motor shell, and a lead can pass through the wiring sleeve and be connected to the circuit board. A soft wiring sleeve is clamped between the two components, so that the waterproof and sealing performances are good.

In the technical scheme, the stator core is clamped on the circumferential surface of the stator frame.

In the technical scheme, the stator frame is circumferentially formed and provided with a plurality of limiting ribs perpendicular to the front end cover, the inner ring of the stator core is provided with limiting grooves corresponding to the limiting ribs, the limiting ribs penetrate through the limiting grooves, and the stator core is clamped on the circumferential surface of the stator frame. Spacing rib and spacing recess mutually support and can improve stator core and stator frame's stability of being connected.

In the technical scheme, more than two bearings are embedded in the shaft tube in a sleeved mode, and the output shaft penetrates through the bearings and is fixed to the inner ring of the bearing. More than two bearings can keep the motor shaft on a horizontal line, and prevent the motor from large radial run-out

In the technical scheme, the end part of the output shaft is sleeved with a sleeve, and the rotor shell is sleeved on the circumference of the sleeve. The rotor housing is conveniently connected with the sleeve.

In the technical scheme, the inner side wall of the rotor shell is provided with a magnetic ring limiting structure. The magnetic ring limiting structure can fix the magnetic ring on the inner side wall of the rotor shell.

In the above technical scheme, the magnetic ring limit structure includes more than three magnetic ring limit points annularly arranged along the inner side wall of the rotor housing, and the magnetic ring limit points are formed by inward bulges on the side wall of the rotor housing. More than three magnetic ring limit points ensure that the magnetic rings are installed and kept on a horizontal plane, and the magnetic ring limit points are easy to machine and form.

In the technical scheme, the pump body is provided with a pump head shell, the pump head shell comprises an upper shell and a lower shell which are arranged up and down, a peristaltic hole is formed in the lower shell, and the front end cover and the pump head shell define a pump cavity together; a control body and a vibrating membrane are arranged in the pump cavity from top to bottom, the control body is provided with a suction cavity and a discharge cavity, a water inlet communicated with the suction cavity is formed in the upper shell, and a water outlet communicated with the discharge cavity is formed in the upper shell; the vibrating membrane is provided with a creeping sheet corresponding to the suction cavity; the eccentric wheel circumference cover is equipped with the bearing of fetching water, the bearing circumference cover of fetching water is equipped with the support of fetching water, the support of fetching water is including fetching water the wheel, it passes and moves about to beat the wheel the wriggling is downthehole, and the screw passes the wriggling piece will the vibrating diaphragm connect to it fetches water the wheel.

Compared with the prior art, the invention has the beneficial effects that: the outer rotor type motor in the RO pump has high running efficiency and smaller volume; the running efficiency of the RO pump is effectively enhanced, and the service life of the RO pump is longer.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic sectional view of the structure of the present invention.

Fig. 3 is an expanded view of the structure of the present invention.

Fig. 4 is an expanded view of the structure of the present invention.

Fig. 5 is a schematic structural view of a front end cap according to the present invention.

FIG. 6 is a schematic view of a stator frame according to the present invention.

Fig. 7 is a schematic view of a rotor assembly according to the present invention.

Fig. 8 is a schematic view of a stator core structure according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and examples.

It should be noted that, in the present invention, terms of orientation, such as "upper", "lower", "left", "right", etc., are described with reference to the orientation of the drawings in the present specification.

Referring to fig. 1 and 2, the outer rotor brushless motor RO pump includes a pump body 1 and a driving motor 2 connected to each other, the pump body 1 has a pump housing, and the pump housing includes an upper housing 10 and a lower housing 11 disposed up and down, respectively; the driving motor 2 is provided with a motor shell 21 and further comprises a front end cover 20 for closing the motor shell 21; the fastener passes through the upper shell 10 and the lower shell 11 and is connected to one end of a front end cover 20, and the front end cover 20 and the pump shell are connected to define a pump cavity 1 a; the fastener passes through the motor shell and is connected to the other end of the front end cover 20, and the motor shell and the front end cover 20 jointly define a motor cavity 2 a; thus, the pump body 1 and the driving motor 2 are fixedly connected in a detachable mode. In the present embodiment, the fastener means a bolt, a screw, or the like.

In the present embodiment, with reference to fig. 2, 3 and 5, the motor cavity 2a has therein: a stator frame 22 (fig. 6) fixedly connected to the front end cover 20, the stator frame 22 being disposed toward the motor cavity 2 a; the fixed connection between the stator frame 22 and the front end cover 20 is specifically as follows: more than three screw holes 22a are formed on the periphery of the stator frame 22 in a forming mode, the front end cover 20 is provided with end cover screw holes 20b (shown in figure 5) corresponding to the screw holes 22a of the stator frame 22, and limiting bolts 22d penetrate through the screw holes 22a to be connected into the end cover screw holes 20b, so that the connection strength of the stator frame 22 and the front end cover 20 is guaranteed. Preferably, the stator frame 22 is circumferentially sleeved with a circuit board 24 for controlling the driving motor 2, the circuit board 24 is provided with a through hole 24a corresponding to the screw hole 22a and the end cover screw hole 20b, and the limiting bolt 22d sequentially penetrates through the through hole 24a and the screw hole 22a to be connected into the end cover screw hole. Thus, the mounting strength of the stator frame 22 and the connection strength of the circuit board 24 are ensured. The stator assembly 26 is circumferentially clamped on the stator frame 22, the stator assembly 26 includes a stator core 260 and a coil (not shown in the figure, and the winding manner of the coil is the same as that of the prior art) wound on the stator core 260, and specifically, the stator core 260 is clamped on the circumference of the stator frame 22; a rotor assembly 27 is arranged along the circumference of the stator assembly 26, the rotor assembly 27 and the stator assembly 26 mutually excite to promote the rotor assembly 27 to rotate, the rotor assembly 27 comprises a rotor shell fixedly arranged at one end part of the output shaft 2b, and a magnetic ring 271 is adhered to the inner side wall of the rotor shell 270; when the coil 261 is energized, the magnetic ring 271 urges the rotor housing 270 and drives the output shaft 2b to rotate. Preferably, the output shaft 2b and the rotor housing 270 are fixed by the following technical scheme, a sleeve 273 is fixedly arranged at the end of the output shaft 2b, a hole is formed in the center of the rotor housing 270, the rotor housing 270 is clamped and arranged on the circumference of the sleeve 273, and the rotor housing 270 is in transmission connection with the output shaft 2 b.

Specifically, the output shaft 2b passes through the shaft tube 22b in the center of the stator frame 22 and extends into the pump cavity 1a, in order to prevent the output shaft 2b from jumping too much in the radial direction, more than two bearings 23 are arranged in the shaft tube 22b in a clamping manner, the more than two bearings 23 are coaxially arranged, and the output shaft 2b passes through the inner ring of the bearing 23 and is fixed. The geometric center of the front end cover 20 is provided with a through hole 20a, the output shaft 2b passes through the through hole 20a and extends into the pump cavity 1a, an eccentric wheel 17 is fixedly sleeved at the end part, and the output shaft 2b rotates to drive the eccentric wheel 17 to do eccentric motion.

With reference to fig. 2 and 4, the pump body 1 is specifically: a control body 12 and a vibrating membrane 13 which are arranged up and down are clamped between the upper shell 11 and the lower shell 11, the control body 12 is arranged on the upper side, and the vibrating membrane 13 is arranged on the lower side; a water fetching bearing 16 is sleeved on the eccentric wheel 17, a water fetching support 14 is sleeved on the water fetching bearing 16, three water fetching wheels 15 are uniformly arranged on the water fetching support 14 upwards, a creeping hole 11a corresponding to the water fetching wheel 15 is formed in the lower shell 11, the diameter of the creeping hole 11a is larger than that of the water fetching wheel 15, and the water fetching wheel 15 penetrates through and moves in the creeping hole 11 a; a vibrating membrane 13 is arranged on the lower shell 11, the vibrating membrane 13 is provided with a creeping sheet 13a corresponding to the water beating wheel 15 and the creeping hole 11a, and a screw 15a penetrates through the creeping sheet 13a to connect the vibrating membrane 13 to the water beating wheel 15; a control body 12 is arranged on the vibrating membrane 13, a suction cavity 12a is formed in the circumferential direction of the control body 12, and the suction cavity 12a is communicated with the water inlet 10a on the upper shell 10; a discharge chamber 12b is provided between the suction chambers 12a, and the discharge chamber 12b is provided to communicate with the water discharge port 10b of the upper case 10; a suction valve for one-way stopping is arranged on the suction cavity 12a, so that water can be prevented from being discharged from the suction cavity 12 a; the discharge chamber 12b is provided with a discharge valve for one-way shutoff, and the discharged water can be prevented from flowing backward into the suction chamber 12 a.

More preferably, with reference to fig. 3 and 8, because the stator module 26 and the rotor module 27 are excited mutually, the strength of the stator module 26 needs to be ensured, specifically, as follows, a plurality of limiting ribs 22c perpendicular to the front end cover 20 are formed on the circumference of the stator frame 22, a limiting groove 260a (as shown in fig. 8) capable of being matched with the limiting ribs 22c is formed in the inner ring of the stator core 260, each limiting rib 22c can penetrate through the limiting groove 260a, and the stator core 260 and the stator frame 22 are clamped with each other, so that the connection strength between the stator core 260 and the stator frame 22 can be ensured.

Preferably, as shown in fig. 7, the magnetic ring 271 is connected to the rotor housing 270 by the following technical solutions: the magnetic ring 271 and the rotor shell 270 are arranged in a mutual pressing mode, glue is coated on the connecting surface, and the connecting strength is guaranteed; below the magnetic ring 271, the rotor housing 270 is provided with a magnetic ring limiting structure 272 for limiting the geometric position of the magnetic ring 271 and preventing the magnetic ring 271 from falling off and misplacing; in the embodiment, the magnetic ring limiting structures 272 are magnetic ring limiting points 272a protruding inwards from the side wall of the rotor housing 270, the magnetic ring limiting points 272a have more than three and are located on the same horizontal plane, and the more than three magnetic ring limiting points 272a can keep the magnetic ring 271 on the same horizontal plane. Those skilled in the art should understand that the magnetic ring limiting structure 272 should not be limited to the magnetic ring limiting point 272a, but can be implemented by other methods, such as: the magnetic ring limit structure 272 may be a circle of steps along the circumferential direction of the rotor housing. The three-point limiting mode is selected to accelerate heat dissipation, and the mass of the rotor shell 270 is reduced.

In the present embodiment, a wire sleeve 25 (as shown in fig. 1) is interposed between the front end cover 20 and the motor housing 21, and the lead wires can be connected to the circuit board 24 through the wire sleeve 25; and the wire sleeve is made of soft materials, so that the wire sleeve has good rebound resilience, and the connection and sealing performance of the wire sleeve 25, the front end cover 20 and the motor shell 21 is good.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Outer rotor brushless motor RO pump, including interconnect's pump body (1) and driving motor (2), its characterized in that: the driving motor (2) is provided with a motor shell (21) and a front end cover (20) used for closing the motor shell (21), and the motor shell (21) and the front end cover (20) jointly define a motor cavity (2 a); a stator frame (22) is fixedly connected to the front end cover (20) and is arranged towards the interior of the motor cavity (2 a), the motor cavity (2 a) comprises a stator assembly (26) fixedly connected to the stator frame (22) and a rotor assembly (27) surrounding the stator assembly (26), and the rotor assembly (27) and the stator assembly (26) are mutually excited; the stator assembly (26) comprises a stator core (260) and a coil wound on the stator core (260), and the rotor assembly (27) comprises a rotor shell (270) and a magnetic ring (271) fixedly connected to the inner side wall of the rotor shell (270); a motor output shaft (2 b) penetrates through a shaft tube (22 b) of the stator frame (22) and one end of the motor output shaft is fixedly connected with a rotor shell (270); the center of the front end cover (20) is provided with a through hole (20 a), and the other end of the output shaft (2 b) penetrates through the through hole (20 a) and is sleeved with an eccentric wheel (17).

2. An external rotor brushless motor RO pump as claimed in claim 1, wherein: stator frame (22) set up three above screw (22 a) along circumferential direction, front end housing (20) be equipped with screw (22 a) corresponding end cover screw (20 b) stator frame (22) circumference cover is equipped with circuit board (24) that are used for controlling driving motor (2), through-hole (24 a) have on circuit board (24), and spacing bolt (22 d) pass through-hole (24 a) screw (22 a) are connected to end cover screw (20 b).

3. An external rotor brushless motor RO pump as claimed in claim 2, wherein: a wiring sleeve (25) made of soft materials is clamped between the front end cover (20) and the motor shell (21), and a lead can pass through the wiring sleeve (25) and is connected to a circuit board (24).

4. An external rotor brushless motor RO pump as claimed in claim 1, wherein: the stator core (260) is clamped on the circumferential surface of the stator frame (22).

5. An outer rotor brushless motor RO pump as claimed in claim 1 or 4, wherein: stator frame (22) circumference shaping is equipped with a plurality of perpendicular to spacing rib (22 c) of front end housing (20), stator core (260) inner circle be equipped with spacing rib (22 c) corresponding spacing recess (260 a), spacing rib (22 c) pass spacing recess (260 a) set up, stator core (260) block sets up stator frame (22) circumferential surface.

6. An external rotor brushless motor RO pump as claimed in claim 1, wherein: more than two bearings (23) are nested in the shaft tube (22 b), and the output shaft (2 b) penetrates through the bearings (23) and is fixed to the inner ring of the bearings (23).

7. An external rotor brushless motor RO pump as claimed in claim 1, wherein: the end of the output shaft (2 b) is sleeved with a sleeve (273), and the rotor shell (270) is sleeved on the circumference of the sleeve (273).

8. An external rotor brushless motor RO pump as claimed in claim 1, wherein: and a magnetic ring limiting structure (272) is arranged on the inner side wall of the rotor shell (270).

9. An external rotor brushless motor RO pump as claimed in claim 8, wherein: the magnetic ring limiting structure (272) comprises more than three magnetic ring limiting points (272 a) annularly arranged along the inner side wall of the rotor shell (270), and the magnetic ring limiting points (272 a) are formed by inwards protruding the side wall of the rotor shell (270).

10. An external rotor brushless motor RO pump according to any of claims 1 to 9, wherein: the pump body (1) is provided with a pump head shell, the pump head shell comprises an upper shell (10) and a lower shell (11) which are arranged up and down, the lower shell (11) is provided with a peristaltic hole (11 a) in a forming mode, and the front end cover (20) and the pump head shell jointly define a pump cavity (1 a); a control body (12) and a vibrating membrane (13) are arranged in the pump cavity (1 a) up and down, the control body (12) is provided with a suction cavity (12 a) and a discharge cavity (12 b), the upper shell (10) is provided with a water inlet (10 a) communicated with the suction cavity (12 a) in a forming mode, and the upper shell (10) is provided with a water outlet (10 b) communicated with the discharge cavity (12 b) in a forming mode; the vibrating membrane (13) is provided with a creeping sheet (13 a) corresponding to the suction cavity (12 a); eccentric wheel (17) circumference cover is equipped with the bearing 16 of fetching water, the bearing (16) circumference cover of fetching water is equipped with the support (14) of fetching water, the support (14) of fetching water is including fetching water wheel (15), it passes and moves about to fetch water wheel (15) in wriggling hole (11 a), screw (15 a) pass wriggling piece (13 a) will vibrating membrane (13) are connected to fetching water wheel (15).