CN210484096U

CN210484096U - Micro pump

Info

Publication number: CN210484096U
Application number: CN201921367708.5U
Authority: CN
Inventors: 陈水根; 李国龙
Original assignee: Shenzhen Simps Technologies Co ltd
Current assignee: Shenzhen Simps Technologies Co ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-05-08
Anticipated expiration: 2029-08-21

Abstract

The embodiment of the utility model provides a micropump, including the pump case, assemble the impeller in the pump case, be fixed in the pump case and with impeller fixed connection's permanent magnet rotor and assemble the winding stator that is used for driving the rotation of permanent magnet rotor in the pump case outside, the sunken hollow boss that forms in the inside of pump case of a lateral wall middle part towards the pump case, the permanent magnet rotor encircles the setting of hollow boss, the winding stator is assembled in the inner chamber of hollow boss and is located the inside and outside both sides of the lateral wall of hollow boss respectively with the permanent magnet rotor. The embodiment of the utility model provides a sunken formation in the inside convex hollow boss of pump case through the inside at a lateral wall middle part of pump case towards the pump case, the permanent magnet rotor encircles the setting of hollow boss, and the winding stator is assembled in the inner chamber of hollow boss, and the winding stator lies in the inside and outside both sides of the lateral wall of hollow boss respectively with the permanent magnet rotor, sets up winding stator and permanent magnet rotor on same horizontal plane, effectively reduces the thickness of pump.

Description

Micro pump

Technical Field

The embodiment of the utility model provides a relate to pump technical field, especially relate to a micropump.

Background

The micropump is applied to products with small volume, such as a computer liquid cooling system, a notebook computer liquid cooling system, an artwork, a coffee machine, a tea maker and a humidifier, and the like.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem who solves provides a micropump, can effectively reduce the thickness of pump.

In order to solve the technical problem, the embodiment of the utility model provides an adopt following technical scheme: a micro pump comprises a pump shell provided with a liquid inlet and a liquid outlet, an impeller assembled in the pump shell, a permanent magnet rotor fixed in the pump shell and fixedly connected with the impeller, and a winding stator assembled outside the pump shell and used for driving the permanent magnet rotor to rotate, wherein the middle of one side wall of the pump shell is sunken towards the inside of the pump shell to form a hollow boss protruding from the inside of the pump shell, the permanent magnet rotor is arranged around the hollow boss, and the winding stator is assembled in the inner cavity of the hollow boss and is respectively positioned at the inner side and the outer side of the side wall of the hollow boss together with the permanent magnet rotor.

Furthermore, a core column formed by extending from the end face of the hollow boss to the outside of the pump shell is formed in the inner cavity of the hollow boss, the winding stator is sleeved on the core column, a core shaft with one end extending into the pump shell is further arranged on the end face of the hollow boss, and the impeller is pivoted on one end of the core shaft extending into the pump shell by means of a bearing.

Further, the winding stator comprises a metal framework and a winding wound on the metal framework, and the surface of the metal framework is further coated with an insulating coating through electrophoresis, electroplating or electrostatic spraying.

Furthermore, ribs for positioning the winding stator are further arranged in the inner cavity of the hollow boss, and protective glue for submerging the winding stator is filled in the inner cavity of the hollow boss.

Furthermore, a heat dissipation plate covering the winding stator is assembled outside the side wall of the pump shell forming the hollow boss.

Furthermore, a plurality of embedded blocks distributed around the circumference are formed on the outer surface of the side wall of the pump shell, the embedded holes are formed in the heat dissipation plate in a one-to-one correspondence mode corresponding to the embedded blocks, and the heat dissipation plate is embedded in the side wall of the pump shell in a one-to-one correspondence mode and fixed to the outer surface of the side wall of the pump shell when being attached to the side wall of the pump shell.

Further, the pump casing comprises a base plate and a cover cap buckled with the base plate, and the hollow boss is formed on the base plate.

Furthermore, an annular groove surrounding the periphery of the hollow boss is formed in the inner side wall of the base plate, and the permanent magnet rotor is accommodated in the annular groove.

Further, the inside wall of base plate still further is formed with around the peripheral seal groove of ring channel, the inner wall of the base plate one side of the orientation of shroud corresponds the protrusion and is formed with annular separation blade, annular separation blade corresponds to insert and locates in the seal groove, and it has the sealing rubber ring to block up between the cell wall of annular separation blade and seal groove, annular separation blade, the inner wall of the orientation of base plate one side of shroud, base plate and the sealing rubber ring cooperation forms and is used for the holding the impeller with the seal space of permanent magnet rotor.

Further, the micropump further comprises a control circuit board assembled in the pump shell and located outside the sealed space, the surface of the control circuit board is parallel to the rotation central axis of the impeller, and a temperature sensor attached to the outer wall of the sealed space is arranged on the control circuit board.

Adopt above-mentioned technical scheme, the embodiment of the utility model provides a following beneficial effect has at least: the embodiment of the utility model provides a sunken formation in the inside convex hollow boss of pump case through the inside at a lateral wall middle part of pump case towards the pump case, surround hollow boss setting with impeller fixed connection's permanent magnet rotor in the pump case for the rotatory winding stator of drive permanent magnet rotor is assembled in hollow boss's inner chamber, the winding stator is located hollow boss's lateral wall inside and outside both sides respectively with the permanent magnet rotor, from this with the planar setting of winding stator and permanent magnet rotor, can effectively reduce the thickness of pump.

Drawings

Fig. 1 is a schematic perspective view of an alternative embodiment of the micropump of the present invention in an exploded state.

Fig. 2 is another perspective view of the micropump of the present invention in an alternative embodiment, in an exploded state.

Fig. 3 is a schematic perspective view of an alternative embodiment of the micropump of the present invention.

Fig. 4 is another schematic perspective view of an alternative embodiment of the micropump of the present invention.

Fig. 5 is a schematic cross-sectional view of an alternative embodiment of the micropump of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the following illustrative embodiments and description are only intended to illustrate the present invention, and are not intended as a limitation of the present invention, and that features of the embodiments and examples may be combined with each other without conflict.

As shown in fig. 1-5, an optional embodiment of the present invention provides a micropump, including pump case 1 with inlet 10 and outlet 12 and assemble in impeller 3 in pump case 1, the micropump is further including being fixed in pump case 1 and with 3 fixed connection's of impeller permanent magnet rotor 5 and assemble in the pump case 1 outside is used for driving the rotatory winding stator 7 of permanent magnet rotor 5, a lateral wall middle part orientation of pump case 1 the inside of pump case 1 is sunken to be formed at the inside convex hollow boss 14 of pump case 1, permanent magnet rotor 5 encircles hollow boss 14 sets up, winding stator 7 assemble in the inner chamber 141 of hollow boss 14 and with permanent magnet rotor 5 is located respectively the inside and outside both sides of the lateral wall 143 of hollow boss 14.

In the embodiment, the hollow boss 14 protruding in the pump shell 1 is formed by sinking the middle part of one side wall of the pump shell 1 towards the inside of the pump shell 1, the permanent magnet rotor 5 fixedly connected with the impeller 3 in the pump shell 1 is arranged around the hollow boss 14, the winding stator 7 for driving the permanent magnet rotor 5 to rotate is assembled in the inner cavity 141 of the hollow boss 14, the winding stator 7 and the permanent magnet rotor 5 are respectively positioned at the inner side and the outer side of the side wall 143 of the hollow boss 14, therefore, the winding stator 7 and the permanent magnet rotor 5 are arranged in a planar mode, and the thickness of the pump can be effectively reduced.

In another optional embodiment of the present invention, a core column 16 formed by extending from the end surface of the hollow boss 14 to the outside direction of the pump case 1 is further formed in the inner cavity 141 of the hollow boss 14, the winding stator 7 is sleeved on the core column 16, the end surface of the hollow boss 14 is further provided with a core shaft 163 extending into the pump case 1 with one end, the impeller 3 is pivotally arranged on the core shaft 163 extending into the pump case 1 with the help of a bearing 165. In a specific implementation, a shaft hole 161 may be formed in the middle of the stem 16, and the spindle 163 may be fixed in the shaft hole 161. In the embodiment, the core column 16 formed by extending from the end face of the hollow boss 14 to the outside of the pump case 1 is arranged in the inner cavity 141 of the hollow boss 14, the winding stator 7 is sleeved on the core column 16, so that the winding stator 7 is fixed in the inner cavity 141 of the hollow boss 14, the end face of the hollow boss 14 is further fixed with the spindle 163 with one end extending into the pump case 1, and the impeller 3 is pivoted on the end of the spindle 163 extending into the pump case 1 by means of the bearing 165, so as to form a compact micropump structure.

In yet another alternative embodiment of the present invention, as shown in fig. 1 and fig. 2, the winding stator 7 includes a metal frame 70 and windings 72 wound on the metal frame 70, and the surface of the metal frame 70 is coated with an insulating layer (not shown) by electrophoresis, electroplating or electrostatic spraying. The winding stator of the traditional pump motor adopts a plastic skeleton, and needs to adopt larger thickness to influence the lightness and thinness of the size in order to ensure the structural strength. In the present embodiment, the windings 72 are wound by using the metal frame 70, so that the sufficient structural strength can be achieved with a thinner thickness, and then the insulation coating is formed on the surface of the metal frame 70, so that the air gap of the motor can be reduced, the winding stator 7 can be thinner, and the thickness of the micro pump can be further reduced.

In another optional embodiment of the present invention, the inner cavity 141 of the hollow boss 14 is further provided with a rib 145 for positioning the winding stator 7, and the inner cavity 141 of the hollow boss 14 is further filled with a protective glue for flooding the winding stator 7. In the embodiment, the ribs 145 are further arranged in the inner cavity 141 of the hollow boss 14 and used for positioning the winding stator 7 in the inner cavity 141 of the hollow boss 14, and the inner cavity 141 of the hollow boss 14 is further filled with the protective glue for submerging the winding stator 7, so that the winding stator 7 and the ribs 145 are arranged into a whole, the strength and the temperature resistance of the pump shell 1 are greatly improved, and the deformation of the pump shell 1 is avoided. In practical implementation, the rib 145 may be divided into a low rib 1450 close to the core column 16 and a high rib 1452 far from the core column 16, the low rib 1450 is used for carrying the winding stator 7, and the high rib 1452 is used for separating each coil winding of the winding stator, so that the winding stator 7 can be more firmly installed.

In another alternative embodiment of the present invention, the heat sink plate 9 covering the winding stator 7 is further assembled outside the side wall 143 of the pump housing 1 forming the hollow boss 14. In this embodiment, a heat sink plate 9 is assembled to the outside of the side wall 143 of the pump housing 1 forming the hollow boss 14, so as to cover the winding stator 7 and enhance heat dissipation of the micro pump.

In another optional embodiment of the present invention, a plurality of fitting blocks 147 are formed on the outer surface of the side wall 143 of the pump case 1 forming the hollow boss 14, the heat sink plate 9 is provided with fitting holes 90 corresponding to the fitting blocks 147 in a one-to-one manner, the heat sink plate 9 is fitted to the side wall 143 of the pump case 1, and is fixed to the outer surface of the side wall of the pump case 1 by fitting the fitting holes 90 and the fitting blocks 147 in a one-to-one manner, and the heat sink plate 9 can be further fitted to the side wall 143 of the pump case 1 by using glue. The heat dissipation plate 9 is made of metal, and specifically, in this embodiment, the heat dissipation plate 9 is made of aluminum alloy. In this embodiment, a plurality of engagement blocks 147 are circumferentially distributed on the outer surface of the side wall 143 of the pump case 1 forming the hollow boss 14, the heat sink 9 is provided with the engagement holes 90 corresponding to the engagement blocks 147 in a one-to-one manner, the engagement holes 90 and the engagement blocks 147 are engaged in a one-to-one manner, so that the heat sink 9 is attached and fixed to the outer surface of the side wall of the pump case 1, and the heat sink 9 is tightly attached to the outer surface of the side wall of the pump case 1, thereby reducing the thickness of the pump, increasing the heat dissipation area and the heat dissipation efficiency of the winding stator 7, and facilitating the heat dissipation of the.

In yet another alternative embodiment of the present invention, the pump housing 1 includes a base plate 18 and a cover 19 fastened to the base plate 18, and the hollow boss 14 is formed on the base plate 18. In the embodiment, the pump housing 1 is assembled by fastening the base plate 18 and the cover cap 1, and is used for forming a sealed space for accommodating the impeller 3 and the permanent magnet rotor 5.

In yet another alternative embodiment of the present invention, the inner sidewall of the base plate 18 is further formed with an annular groove 181 surrounding the outer periphery of the hollow boss 14, and the permanent magnet rotor 5 is received in the annular groove 181. In the embodiment, the annular groove 181 surrounding the periphery of the hollow boss 14 is formed in the inner side wall of the substrate 18, and the permanent magnet rotor 5 is accommodated in the annular groove 181, so that the permanent magnet rotor 5 and the winding stator 7 are positioned on the same horizontal plane, thereby effectively reducing the thickness of the pump.

In the present invention, in another optional embodiment, the inner sidewall of the base plate 18 is further formed with a sealing groove 183 surrounding the periphery of the annular groove 181, the inner wall of the cover 19 facing one side of the base plate corresponds to the protrusion to form an annular blocking piece 190, the annular blocking piece 190 corresponds to be inserted and located in the sealing groove 183, and a sealing rubber ring 185 is plugged between the annular blocking piece 190 and the groove wall of the sealing groove 183, the annular blocking piece 190, the inner wall of the cover 19 facing one side of the base plate 18, the base plate 18 and the sealing rubber ring 185 cooperate to form a sealing space for accommodating the impeller 3 and the permanent magnet rotor 5. In this embodiment, a sealing groove 183 surrounding the periphery of the annular groove 181 is further formed in the inner sidewall of the base plate 18, an annular blocking piece 190 is correspondingly formed in the inner wall of the cover 19 facing the base plate in a protruding manner, the annular blocking piece 190 is correspondingly inserted into the sealing groove 183, and a sealing rubber ring 185 is blocked between the annular blocking piece 190 and the groove wall of the sealing groove 183, so that the annular blocking piece 190, the inner wall of the cover 19 facing the base plate 18, and the sealing rubber ring 185 cooperate to form a sealing space for accommodating the impeller 3 and the permanent magnet rotor 5.

In another optional embodiment of the present invention, the micropump further includes a control circuit board 8 assembled in the pump case 1 and located outside the sealed space, the surface of the control circuit board 8 is parallel to the rotation axis of the impeller 3, the control circuit board 8 is provided with a temperature sensor 81 attached to the outer wall of the sealed space, specifically, a clamping groove 192 is provided in the cover cap 19, and the control circuit board 8 is provided in the clamping groove 192. In the embodiment, the surface of the control circuit board 8 is parallel to the rotation central axis of the impeller 3 and is arranged outside the sealed space of the pump shell 1, the temperature sensor 8 attached to the outer wall of the sealed space is arranged on the control circuit board 8, the temperature of the winding stator 7 of the micropump can be accurately sensed, the temperature of the micropump is prevented from being too high when the micropump works, in addition, the control circuit board 8 and the winding stator 7 are separately installed, the installation space in the pump shell 1 can be more effectively utilized to flexibly install the control circuit board 8, and the overall thickness of the micropump is effectively reduced.

In another alternative embodiment of the present invention, the impeller 3 includes a wheel disc 30 disposed on the inner sidewall of the base plate 18 and a fan blade 32 pivoted to the spindle 163 and extending into one end of the pump casing 1, and the fan blade 32 is adjacent to the one end of the pump casing and is uniformly provided with through holes 34 therebetween. In this embodiment, the through holes 34 are uniformly formed between the adjacent fan blades 32, that is, the adjacent fan blades 32 are hollowed out, so that the upward buoyancy of the fan blades 32 can be eliminated. In a specific implementation, a rim 36 may be further formed at the side edge of the disk 30 perpendicular to the disk surface, and the permanent magnet rotor 5 may be fixed to the rim 36.

In yet another alternative embodiment of the present invention, the fan blades 32 are arranged in a sickle shape. This embodiment can increase the pressure of the micro pump by providing the fan blades 32 in a sickle shape.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, and these forms are within the scope of the present invention.

Claims

1. The utility model provides a micropump, is including being equipped with the pump case of inlet and liquid outlet and assembling in the impeller in the pump case which characterized in that: the micropump further comprises a permanent magnet rotor fixed in the pump shell and fixedly connected with the impeller and a winding stator assembled outside the pump shell and used for driving the permanent magnet rotor to rotate, the middle of one side wall of the pump shell is sunken towards the inside of the pump shell to form a hollow boss protruding from the inside of the pump shell, the permanent magnet rotor is arranged around the hollow boss, and the winding stator is assembled in the inner cavity of the hollow boss and is respectively positioned on the inner side and the outer side of the side wall of the hollow boss together with the permanent magnet rotor.

2. The micropump of claim 1, wherein the hollow boss further has a stem formed therein and extending from an end surface of the hollow boss toward an outside of the pump casing, the winding stator is sleeved on the stem, the end surface of the hollow boss is further provided with a spindle having one end extending into the pump casing, and the impeller is pivotally mounted on the end of the spindle extending into the pump casing by means of a bearing.

3. The micropump of claim 2, wherein the winding stator comprises a metal skeleton and a winding wound on the metal skeleton, and the surface of the metal skeleton is further coated with an insulating coating by electrophoresis, electroplating or electrostatic spraying.

4. The micropump of claim 1, wherein the hollow boss further has a rib disposed therein for positioning the winding stator, and the hollow boss further has a protective adhesive filled therein for burying the winding stator.

5. The micropump of claim 1, wherein a heat radiating plate covering the winding stator is further assembled to an outer portion of the side wall of the pump housing forming the hollow boss.

6. The micropump of claim 5, wherein the outer surface of the side wall of the pump housing forming the hollow boss is further formed with a plurality of engagement blocks distributed around the circumference, and the heat sink is provided with engagement holes corresponding to the engagement blocks in a one-to-one correspondence, and the heat sink is fixed to the outer surface of the side wall of the pump housing by engaging the engagement holes with the engagement blocks in a one-to-one correspondence when being attached to the side wall of the pump housing.

7. The micropump of claim 1, wherein the pump housing includes a base plate and a cover that snaps over the base plate, the hollow boss being formed on the base plate.

8. The micropump of claim 7, wherein the inner sidewall of the base plate is further formed with an annular groove surrounding the outer periphery of the hollow boss, the permanent magnet rotor being received in the annular groove.

9. The micropump of claim 8, wherein the inner sidewall of the base plate further forms a sealing groove surrounding the periphery of the annular groove, an inner wall of the cover cap facing the base plate correspondingly protrudes to form an annular blocking piece, the annular blocking piece is correspondingly inserted into the sealing groove, a sealing rubber ring is blocked between the annular blocking piece and the groove wall of the sealing groove, and the annular blocking piece, the inner wall of the cover cap facing the base plate, the base plate and the sealing rubber ring cooperate to form a sealing space for accommodating the impeller and the permanent magnet rotor.

10. The micropump of claim 9, further comprising a control circuit board assembled in the pump housing and located outside the sealed space, wherein a plate surface of the control circuit board is parallel to a rotation central axis of the impeller, and the control circuit board is provided with a temperature sensor attached to an outer wall of the sealed space.