Micro pump

Abstract

The utility model provides a miniature pump which comprises a pump shell, a rotor, a stator, a sealing piece connected with the top side and a fixing piece, the pump shell is provided with the top side with a pump cavity, a bottom side, a water inlet and a water outlet, one end of a shaft center is fixedly arranged in the pump cavity, a bearing is arranged on the shaft center in a pivoted mode, and the sealing piece is connected with the bottom side of the pump cavity. The rotor is arranged in the pumping chamber and is used for circulating a working liquid in the pumping chamber, the holding piece is arranged on one side of the sealing piece corresponding to the bearing, and the other end of the shaft center is accommodated in the holding piece; by means of the design, the effect of avoiding friction is effectively achieved.

Description

Technical Field

[0001] The utility model relates to a micro pump, and particularly to a micro pump capable of achieving a friction avoidance effect. Background Art

[0002] With the increasing computing efficiency of electronic devices, a large amount of heat is generated when the electronic components arranged inside operate. Usually, a radiator or heat dissipation fins need to be arranged on the electronic components to increase the heat dissipation area and thus improve the heat dissipation efficiency. However, since the heat dissipation effect achieved by the radiator and the heat dissipation fins is limited, the current conventional technology has adopted a micro pump as a solution to enhance the heat dissipation efficiency.

[0003] In a conventional water cooling device, the heat absorbed by a heat generating component (processor or graphics processor) is heat-exchanged with a cooling liquid inside the water cooling device, and then a pump inside the water cooling device is used to circulate the cooling liquid. The water cooling device is connected to a radiator through a plurality of pipe bodies, so that the cooling liquid can perform heat-exchange circulation and heat dissipation between the radiator and the water cooling device, thereby quickly dissipating heat from the heat generating component.

[0004] The pump structure inside the conventional water cooling device generally consists of a rotor with an impeller accommodated in a chamber of a pump housing, and a stator arranged outside the pump housing. Therefore, when the conventional pump structure starts to operate, the axis of the rotor will continuously rub against the pump housing during rotation, and at the same time, the impeller will move axially up and down during the rotation of the axis and thus rub against the inner side of the pump housing (or a partition inside the pump housing), resulting in mechanical loss problems. In this way, the service life of the pump structure will be reduced, and noise problems are likely to occur when the axis and the impeller rub against the pump housing respectively.

[0005] Thus, how to solve the above-mentioned conventional problems and deficiencies is the direction that the creator of this case and relevant manufacturers in this industry are eager to research and improve. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a micro pump capable of achieving a friction avoidance effect.

[0007] Another purpose of the utility model is to provide a micro pump that effectively avoids the wear of an impeller and extends the service life by contacting a fixing member with a bearing.

[0008] To achieve the above purpose, the utility model provides a micro pump, which is characterized by comprising:

[0009] A pump housing is provided with a top side, a bottom side, a water inlet and a water outlet. A pump chamber is formed on the top side, and the pump chamber communicates with the water inlet and the water outlet. One end of a shaft is fixedly arranged in the pump chamber, and a bearing is pivotally arranged on the shaft.

[0010] A rotor is arranged in the pump chamber and exposed in a working liquid. The rotor is provided with an impeller and a magnetic part corresponding to the impeller. The impeller is arranged outside the bearing and is used for circulating the working liquid in the pump chamber.

[0011] A stator is arranged on the bottom side and corresponds to the magnetic part. The stator is isolated from the working liquid.

[0012] A sealing member has one side connected to the top side of the pump housing to seal the pump chamber; and

[0013] A holding member is arranged on one side of the sealing member corresponding to the bearing, and the other end of the shaft is accommodated in the holding member.

[0014] For the micro pump described above, wherein: a partition plate is arranged on the top side of the pump housing. The partition plate is located in the pump chamber and divides the pump chamber into a first chamber and a second chamber. The partition plate is provided with a water guiding hole, and the water inlet communicates with the second chamber through the first chamber and the water guiding hole.

[0015] For the micro pump described above, wherein: the holding member has a convex ring part which protrudes from the inner side of the sealing member in an axial direction and forms a first axial gap with one end corresponding to the bearing. A receiving space is arranged in the convex ring part and is used for accommodating the other end of the shaft.

[0016] For the micro pump described above, wherein: a free end of the convex ring part is in a round chamfer shape, and the width of the receiving space is greater than the diameter width of the shaft.

[0017] For the micro pump described above, wherein: the outer diameter width of the convex ring part is smaller than the outer diameter width of the bearing.

[0018] For the micro pump described above, wherein: the impeller is provided with a plurality of blades, an impeller cover and an impeller base connected to the impeller cover. The impeller cover is provided with a first socket hole and a plurality of docking holes. The first socket hole penetrates through the center of the impeller cover, and the plurality of docking holes are radially arranged on the impeller cover around the first socket hole. The impeller base is provided with a second socket hole opposite to the first socket hole. The first socket hole and the second socket hole are sleeved outside the bearing. The plurality of blades are radially arranged on an upper side of the impeller base, and the plurality of blades have a convex block connected to the plurality of docking holes. A lower side of the impeller base is attached to one side corresponding to the magnetic part.

[0019] The described micro pump, wherein: the impeller base further has an annular flange, which is formed by extending outward from the lower side of the impeller base adjacent to the second set of holes, and a second axial gap is formed between the annular flange and the bottom corresponding to the pump chamber.

[0020] The described micro pump, wherein: the bottom side has a recessed space, the recessed space is not connected to the pump chamber, the water inlet and the water outlet, the stator is accommodated in the recessed space and is not exposed in the working liquid, the stator has a circuit board, a silicon steel sheet group and a coil group wound on the silicon steel sheet group, the circuit board is electrically connected to the coil group, and a plurality of electronic components are provided on the circuit board. One side of the bottom side of the pump housing is butted against one side of a cover plate, the cover plate is used to close the recessed space, and one end of the cover plate is connected to one end corresponding to the closure member.

[0021] The described micro pump, wherein: the holding member is integrally injection molded on the inner side of the closure member.

[0022] The described micro pump, wherein: the holding member is made of a metal material, a plastic material or a rubber material.

[0023] Through the design of this micro pump of the present utility model, the effects of effectively avoiding friction and extending the service life are achieved. Description of the Drawings

[0024] Figure 1A It is a three-dimensional exploded view of an embodiment of the present utility model.

[0025] Figure 1B It is another perspective three-dimensional exploded view of an embodiment of the present utility model.

[0026] Figure 2A It is a three-dimensional assembled view of an embodiment of the present utility model.

[0027] Figure 2B It is an assembled sectional view of an embodiment of the present utility model.

[0028] Figure 3 It is a schematic diagram of the implementation state of the micro pump of an embodiment of the present utility model.

[0029] Figure 4 It is a three-dimensional exploded view of an alternative embodiment of the present utility model.

[0030] Figure 5 It is a schematic diagram of the implementation state of the micro pump of an alternative embodiment of the present utility model.

[0031] Description of reference numerals: Micro pump - 1; Pump housing - 10; Top side - 101; Pump chamber - 102; First chamber - 1021; Second chamber - 1022; Bottom side - 103; Concave space - 1031; Water inlet - 104; Water outlet - 105; Partition plate - 11; Water guide hole - 111; Rotor - 12; Axis - 121; Impeller - 123; Impeller cover - 1231; First set hole - 1232; Docking hole - 1233; Impeller base - 1234; Second set hole - 1235; Blade - 1236; Bump - 1237; Ring flange - 1238; Magnetic part - 125; Stator - 13; Circuit board - 131; Silicon steel sheet group - 132; Coil group - 133; Bearing - 14; Sealing part - 15; Fixing part - 16; Convex ring part - 161; Accommodating space - 162; Cover plate - 17; First and second axial clearances - 181, 182; Gasket - 19. Detailed implementation manners

[0032] The above objects, structures and functional characteristics of the present utility model will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0033] The present utility model provides a micro pump. Please refer to Figure 1A , which is a three - dimensional exploded view of an embodiment of the present utility model; Figure 1B which is another perspective three - dimensional exploded view of an embodiment of the present utility model;

[0034] Figure 2A which is a three - dimensional assembled view of an embodiment of the present utility model; Figure 2B which is an assembled sectional view of an embodiment of the present utility model; Figure 3 which is a schematic diagram of the implementation state of the micro pump in an embodiment of the present utility model; Figure 4 which is a three - dimensional exploded view of an alternative embodiment of the present utility model; Figure 5Schematic diagram of the implementation state of the micro pump in an alternative embodiment of the present utility model. As shown in the figure, the micro pump 1 includes a pump housing 10, a rotor 12, a stator 13, a sealing member 15 and a holding member 16. The pump housing 10 is provided with a top side 101, a bottom side 103, a water inlet 104 and a water outlet 105. The water inlet 104 and the water outlet 105 are respectively arranged on two side edges of the pump housing 10. A pump chamber 102 is formed on the top side 101 of the pump housing 10. The pump chamber 102 communicates with the water inlet 104 and the water outlet 105. And a partition plate 11 with the function of guiding water is arranged on the top side 101 of the pump housing 10. The partition plate 11 is located in the pump chamber 102 and divides it into a first chamber 1021 and a second chamber 1022 communicating with the water outlet 105. And the partition plate 11 is provided with a water guiding hole 111 communicating the second chamber 1022 with the first chamber 1021. The water inlet 104 communicates with the second chamber 1022 through the first chamber 1021 and the water guiding hole 111. Therefore, after a working liquid (such as pure water) flows into the first chamber 1021 from the water inlet 104, the working liquid is guided by the water guiding hole 111 and then flows into the second chamber 1022. In addition, one side of the sealing member 15 is connected to the top side 101 of the pump housing 10 to seal the pump chamber 102. And the first chamber 1021 is located between the sealing member 15 and the partition plate 11. The second chamber 1022 is located between the partition plate 11 and the bottom of the pump chamber 102. When the present utility model is specifically implemented, a gasket 19 is arranged between the sealing member 15 and the pump housing 10. The gasket 19 is used to increase the sealing performance between the sealing member 15 and the pump housing 10 to prevent the working liquid in the pump chamber 102 from leaking out.

[0035] In an alternative embodiment, please refer to Figure 4 、 Figure 5 As shown, the partition plate 11 is omitted, and the sealing member 15 is directly covered on the top side 101 of the pump housing 10 to seal the pump chamber 102. After the working liquid flows into the pump chamber 102 from the water inlet 104, the rotor 12 disturbs the working liquid in the pump chamber 102 to drive the working liquid to be discharged toward the water outlet 105, and continuous water circulation for heat dissipation is carried out.

[0036] The bottom side 103 of the pump housing 10 is provided with a recessed space 1031, which is recessed from the bottom side 103, and the recessed space 1031 is separated from the bottom side 103 of the pump housing 10 so as not to communicate with the pump chamber 102, the water inlet 104 and the water outlet 105. The stator 13 is accommodated in the recessed space 1031, and one side of a cover plate 17 is connected to the bottom side 103 of the pump housing 10, and the cover plate 17 is used to close the recessed space 1031 to protect the stator 13 from being invaded by foreign objects or damaged by collision. One end of the cover plate 17 is connected to one end of the corresponding sealing member 15, so that the pump housing 10 is covered between the sealing member 15 and the cover plate 17, so as to effectively protect the pump housing 10.

[0037] The rotor 12 is disposed at the bottom of the pump chamber 102 (i.e., the bottom of the second chamber 1022) and is exposed to the working fluid. The rotor 12 in the pump chamber 102 is inductively excited with the stator 13 in the corresponding recessed space 1031 through the pump housing 10. Therefore, when the rotor 12 and the stator 13 are inductively excited to drive the impeller 123 to rotate (or rotate), the working fluid at the water inlet 104 will flow into the second chamber 1022 through the first chamber 1021 and the water guide hole 111 on the partition plate 11. At this time, the impeller 123 will disturb the working fluid in the second chamber 1022 and drive the working fluid to flow out from the water outlet 105 (such as Figure 3 shown).

[0038] The rotor 12 is provided with an impeller 123, a magnetic member 125 disposed corresponding to the impeller 123, and a shaft center 121. One end of the shaft center 121 is fixedly provided on the bottom of the pump chamber 102 and does not rotate. The other end of the shaft center 121 is received in the holding member 16. A bearing 14 is pivotally provided on the shaft center 121, and the bearing 14 rotates (or revolves) together with the impeller 123 on the shaft center 121 as the impeller 123 is driven. The impeller 123 is disposed outside the bearing 14 for circulating the working liquid passing through the pump chamber 102. The impeller 123 is provided with an impeller cover 1231, a plurality of blades 1236, and an impeller base 1234 connected to the impeller cover 1231. The impeller cover 1231 is provided with a first sleeve hole 1232 and a plurality of docking holes 1233. The first sleeve hole 1232 penetrates through the center of the impeller cover 1231. The plurality of docking holes 1233 are radially arranged on the impeller cover 1231 corresponding to the periphery of the first sleeve hole 1232. The impeller base 1234 is provided with a second sleeve hole 1235 opposite to the first sleeve hole 1232. The first and second sleeve holes 1232, 1235 are sleeved outside the bearing 14. The plurality of blades 1236 are radially arranged on an upper side of the impeller base 1234, and the plurality of blades 1236 have a convex block 1237 that can be connected to the corresponding plurality of docking holes 1233, so that the impeller cover 1231 and the impeller base 1234 are integrally combined to form the impeller 123. And a lower side of the impeller base 1234 is attached to a side of the corresponding magnetic member 125 (such as the upper surface of the magnetic member 125).

[0039] In addition, the stator 13 is isolated from the working liquid in the pump chamber 102 and is not exposed to the working liquid. The stator 13 is provided with a circuit board 131, a silicon steel sheet group 132, and a coil group 133 wound around the silicon steel sheet group 132. The circuit board 131 (such as a printed circuit board 131) is electrically connected to the coil group 133, and a plurality of electronic components (such as a processor and other electronic components) are provided on the circuit board 131. The holding member 16 is made of a metal material (such as aluminum, titanium, iron, copper or alloy material), a plastic material (such as soft plastic or hard plastic), or a rubber material (such as soft rubber, hard rubber, thermoplastic polyurethane elastomer rubber). The holding member 16 is disposed on an inner side of the closing member 15 corresponding to the bearing 14. In this embodiment, the holding member 16 is integrally injection-molded on the inner side of the closing member 15. The holding member 16 has a convex ring portion 161. The convex ring portion 161 protrudes from the inner side of the closing member 15 in an axial direction, and a free end of the convex ring portion 161 is in a round chamfer shape. An accommodation space 162 is provided inside the convex ring portion 161 for accommodating the other end of the shaft center 121. The width of the accommodation space 162 is greater than the diameter width of the shaft center 121. The outer diameter width of the convex ring portion 161 is smaller than the outer diameter width of the bearing 14.

[0040] In one embodiment, the holder 16 and the closure 15 are two independent components, and the two independent components can be of the same material (such as both the holder 16 and the closure 15 are made of plastic or metal) or different materials (such as the holder 16 is made of rubber and the closure 15 is made of plastic), and the convex ring portion 161 of the fixing member 16 is formed on the inner side of the closure 15 by means of adhesion, embedding, welding or integral overmolding injection.

[0041] Furthermore, a first axial gap 181 is formed between the convex ring portion 161 and one end corresponding to the bearing 14. The first axial gap 181 is an axial space for allowing the rotor 12 and the bearing 14 to move up and down (or axially) together during rotation. Therefore, the free end of the convex ring portion 161 of the holder 16 directly contacts the surface of one end of the bearing 14 axially moving within the first axial gap 181, so that the impeller cover 1231 of the impeller 123 does not contact the partition plate 11 and the inner side of the closure 15, and there is no axial friction for the impeller 123, effectively avoiding the effect of friction and effectively reducing the noise of the micro pump 1 during operation.

[0042] The impeller base 1234 is further provided with an annular flange 1238, which extends outward from the lower side of the impeller base 1234 adjacent to the second sleeve hole 1235, and a second axial gap 182 is formed between the annular flange 1238 and the bottom corresponding to the pump chamber 102. The second axial gap 182 is an axial space for allowing the rotor 12 to move up and down (or axially) during rotation. Therefore, when the annular flange 1238 of the impeller 123 axially moves within the second axial gap 182, it directly contacts the bottom surface of the pump chamber 102, so that the impeller base 1234 of the impeller 123 and the magnetic member 125 do not contact the bottom surface of the pump chamber 102, and there is no axial friction for the impeller 123, effectively avoiding the effect of friction and reducing the noise.

[0043] Therefore, through the design of the micro pump 1 of the present utility model, the effect of avoiding friction is effectively achieved, and the effect of extending the service life of the micro pump 1 and reducing noise can also be effectively achieved. In addition, the micro pump 1 of the present utility model can be applied to a water cooling device (not shown in the figure), so that the working liquid can perform heat exchange circulation cooling between a water cooling head and a radiating water cooling row of the water cooling device through the micro pump 1 to achieve the effect of water cooling.

Claims

1. A micro pump, characterized in that: include: A pump housing is provided with a top side, a bottom side, a water inlet and a water outlet, the top side forms a pump chamber, the pump chamber is connected with the water inlet and the water outlet, one end of an axis is fixedly arranged in the pump chamber, and a bearing is pivotally arranged on the axis; a rotor, disposed in the pump chamber and exposed to a working fluid, the rotor being provided with an impeller and a magnetic member corresponding to the impeller, the impeller being disposed outside the bearing for circulating the working fluid in the pump chamber; a stator, disposed on the bottom side and corresponding to the magnetic member, the stator being isolated from the working fluid; a closing member, one side of which is connected to the top side of the pump housing to close the pump chamber; and A holding piece is arranged on one side of the closing piece corresponding to the bearing, and the other end of the axis is accommodated in the holding piece.

2. The micro pump according to claim 1, wherein: A partition plate is provided on the top side of the pump housing. The partition plate is located in the pump chamber to separate a first chamber and a second chamber. The partition plate is provided with a water guide hole. The water inlet is connected to the second chamber through the first chamber and the water guide hole.

3. The micro pump according to claim 1, wherein: The retaining member has a convex ring portion, which protrudes from the inner side of the closure member in an axial direction and forms a first axial gap with one end corresponding to the bearing. A accommodating space is provided inside the convex ring portion, and the accommodating space is used to accommodate the other end of the axis.

4. The micro pump according to claim 3, characterized in that: A free end of the convex ring portion is in a round chamfered shape, and the width of the accommodating space is greater than the diameter width of the axis.

5. The micro pump according to claim 3, characterized in that: The outer diameter width of the convex ring portion is smaller than the outer diameter width of the bearing.

6. The micro pump according to claim 3, characterized in that: The impeller is provided with a plurality of blades, an impeller cover and an impeller base connected to the impeller cover. The impeller cover is provided with a first set of holes and a plurality of docking holes. The first set of holes is arranged at the center of the impeller cover. The plurality of docking holes are radially arranged on the impeller cover corresponding to the periphery of the first set of holes. The impeller base is provided with a second set of holes corresponding to the first set of holes. The first set of holes and the second set of holes are sleeved on the outer side of the bearing. The plurality of blades are radially arranged on an upper side of the impeller base, and the plurality of blades have a protrusion connected to the corresponding plurality of docking holes. A lower side of the impeller base is attached to a side corresponding to the magnetic member.

7. The micro pump according to claim 6, characterized in that: The impeller base is also provided with an annular flange, which is extended outward from the lower side of the impeller base adjacent to the second set of holes and forms a second axial gap with the bottom of the corresponding pump chamber.

8. The micro pump according to claim 1, wherein: The bottom side is provided with a recessed space, which is not connected to the pump chamber, the water inlet and the water outlet. The stator is accommodated in the recessed space and is not exposed to the working liquid. The stator is provided with a circuit board, a silicon steel sheet group and a coil group wound on the silicon steel sheet group. The circuit board is electrically connected to the coil group, and a plurality of electronic components are provided on the circuit board. The bottom side of the pump housing is connected to one side of a cover plate, and the cover plate is used to close the recessed space, and one end of the cover plate is connected to one end corresponding to the closing member.

9. The micro pump according to claim 1, wherein: The retaining member is integrally injection-molded on the inner side of the closing member.

10. The micro pump according to claim 1, wherein: The holding piece is made of metal material, plastic material or rubber material.

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