阅读说明：本技术 一种超薄微型泵的轴承结构及超薄微型泵 (Bearing structure of ultra-thin micropump and ultra-thin micropump ) 是由 罗小兵 范义文 吴睿康 邹浩 廖唯唯 张信峰 蓝威 于 2019-08-30 设计创作，主要内容包括：本发明属于超薄旋转机械领域,并具体公开了一种超薄微型泵的轴承结构及超薄微型泵。所述轴承结构包括设于超薄微型泵底座上的盲孔、轴、第一滚珠轴承、第二滚珠轴承和垫圈,轴设于该盲孔中心,所述第一滚珠轴承和第二滚珠轴承从下到上依次套设在所述轴上,垫圈设置在所述第一滚珠轴承内圈与第二滚珠轴承内圈或者所述第一滚珠轴承外圈与第二滚珠轴承外圈之间。所述超薄微型泵包括轴承结构、转子套、蜗壳、底座、叶轮、电机磁体和电机定子。本发明通过垫圈的设置以产生两个滚珠轴承内外圈的行程差,使滚珠直接与轴承内外圈接触,消除滚珠轴承的轴向游隙,实现双滚珠轴承的定位和预紧,使得旋转部件在旋转时轴承结构噪音小、寿命长、精度高。(The invention belongs to the field of ultrathin rotating machinery, and particularly discloses a bearing structure of an ultrathin micropump and the ultrathin micropump. The bearing structure is including locating blind hole, axle, first ball bearing, second ball bearing and the packing ring on the ultra-thin micropump base, and this blind hole center is located to the axle, first ball bearing and second ball bearing from the bottom up overlap in proper order and establish epaxial, the packing ring sets up first ball bearing inner circle and second ball bearing inner circle perhaps between first ball bearing outer lane and the second ball bearing outer lane. The ultrathin micropump comprises a bearing structure, a rotor sleeve, a volute, a base, an impeller, a motor magnet and a motor stator. According to the invention, the stroke difference between the inner ring and the outer ring of the two ball bearings is generated through the arrangement of the gasket, so that the balls are directly contacted with the inner ring and the outer ring of the bearings, the axial play of the ball bearings is eliminated, the positioning and pre-tightening of the double ball bearings are realized, and the bearing structure has low noise, long service life and high precision when a rotating part rotates.)

1. a bearing structure of an ultrathin micropump is characterized by comprising a blind hole arranged on an ultrathin micropump base (5), a shaft (1), a first ball bearing (4), a second ball bearing (2) and a gasket (3), wherein,

The shaft (1) is arranged at the center of the blind hole, the first ball bearing (4) and the second ball bearing (2) are sequentially sleeved on the shaft (1) from bottom to top, the first ball bearing (4) comprises a first ball bearing inner ring (4a) fixedly connected with the shaft (1), a first ball bearing outer ring (4c) fixedly connected with the side wall of the blind hole and first balls (4b) arranged between the first ball bearing outer ring (4c) and the first ball bearing inner ring (4a), the second ball bearing (2) comprises a second ball bearing inner ring (2a) fixedly connected with the shaft (1), a second ball bearing outer ring (2c) fixedly connected with the side wall of the blind hole and second balls (2b) arranged between the second ball bearing outer ring (2c) and the second ball bearing inner ring (2a), the gasket (3) is arranged between the first ball bearing inner ring (4a) and the second ball bearing inner ring (2a) or between the first ball bearing outer ring (4c) and the second ball bearing outer ring (2c) and is used for enabling the first ball bearing outer ring (4c) and the first ball bearing inner ring (4a) and the second ball bearing outer ring (2c) and the second ball bearing inner ring (2a) to form a height difference in the vertical direction so as to eliminate axial play of the first ball bearing (4) and the second ball bearing (2) during working.

2. The bearing structure of an ultra-thin micropump according to claim 1, wherein the horizontal height of the first ball bearing outer ring (4c) is larger than the horizontal height of the first ball bearing inner ring (4 a); the horizontal height of the second ball bearing outer ring (2c) is smaller than that of the second ball bearing inner ring (2 a).

3. The bearing structure of the ultra-thin micropump according to claim 1, wherein the first ball bearing (4) and the second ball bearing (2) are both micro ball bearings, the outer diameters of the first ball bearing outer ring (4c) and the second ball bearing outer ring (2c) are both 3mm to 5mm, and the heights of the first ball bearing inner ring (4a), the first ball bearing outer ring (4c), the second ball bearing inner ring (2a) and the second ball bearing outer ring (2c) are all 1mm to 3 mm.

4. The bearing structure of an ultra-thin micropump according to claim 1, wherein the gasket (3) is a hard plastic sheet or a metal sheet, and the thickness of the gasket is 0.3mm to 0.5 mm.

5. The bearing structure of the ultrathin micropump as claimed in claim 1, characterized in that the shaft (1) comprises a bottom end shoulder (1a) and a connecting shaft (1b) which are sequentially connected, the blind hole comprises a first cavity structure and a second cavity structure which are sequentially arranged from top to bottom, the axes of the first cavity structure and the second cavity structure are collinear, the diameter of the first cavity structure is larger than that of the second cavity structure, the bottom end shoulder (1a) is arranged in the second cavity structure, the thickness of the bottom end shoulder (1a) is smaller than that of the second cavity structure, and meanwhile, the horizontal height of the top surface of the bottom end shoulder (1a) is smaller than that of the top surface of the second cavity structure.

6. The bearing structure of the ultra-thin micropump according to claim 4, wherein the end of the bottom end shaft shoulder (1a) not connected with the connecting shaft (1b) is of a circular arc structure, and a gap is formed between the bottom end shaft shoulder and the bottom surface of the second cavity structure.

7. The ultra-thin micropump bearing structure according to any one of claims 1-6, characterized in that the first ball bearing (4) and the second ball bearing (2) are fixed between the side wall of the blind hole and the shaft (1) by interference fit or bonding.

8. An ultra-thin micropump, characterized in that, including rotor cover (7), spiral case (6), base (5), impeller (8), motor magnet (10), motor stator (9) and according to any one of claims 1-7 bearing structure, rotor cover (7) is located in the cavity that spiral case (6) and base (5) formed, just rotor cover (7) with the top fixed connection of axle (1), impeller (8) are located on the lateral wall of rotor cover (7), motor magnet (10) are located on the inside wall of rotor cover (7), base (5) keep away from one side of spiral case (6) still is equipped with the cavity that holds motor stator (9).

9. The ultra-thin micropump of claim 8, further comprising a sealing ring disposed between the volute (6) and the base (5), and a control circuit disposed at the bottom of the base (5).

Technical Field

The invention belongs to the field of ultrathin rotating machinery, and particularly relates to a bearing structure of an ultrathin micropump and the ultrathin micropump.

Background

The micropump is a power source widely applied to the fields of liquid cooling systems, micro-fluidic systems, drug delivery and the like for driving fluid, and with the development of miniaturization and lightness and thinness of various devices, higher requirements are put on the thickness of the micropump, so that the ultrathin micropump is produced at the same time. The ultra-thin micropump mainly comprises a driving motor, an impeller for applying work to fluid, a base used as a framework of the whole micropump, a volute for guiding the fluid and the like, wherein the impeller is used as a main rotating work applying component, and the stable support of the impeller is related to the performance, noise and reliability of the whole micropump.

Due to space limitations, there are many specificities in the bearing structure of ultra-thin rotating machinery, such as the existing ultra-thin micropumps. (1) The size of the shaft is small: the diameter of the shaft is only 1.5mm, the length is less than 4mm, and the structural size is small and difficult to process and assemble; (2) the bearing hole is not a through hole: in order to prevent liquid from leaking to the outside through the bearing hole, the bearing hole is designed to be a blind hole, so that the bearing can be assembled only from one direction when being assembled, and the assembly mode of the bearing structure is limited; (3) the axial dimension is small: the upper end of the shaft is close to the rotating part, and a pre-tightening structure is difficult to apply to the top end; (4) the requirement on the rotation precision is high: in order to ensure the performance of the ultra-thin micro pump, the clearance between the rotating component and the wall surface is less than 0.15 mm. Due to the multiple effect, the small deviation of the shaft end can be amplified by multiple times at the diameter of the impeller, and the friction between the impeller and the wall surface can be caused, so that the noise and the service life attenuation are caused, and higher requirements are provided for the precision of the bearing structure. The existing ultra-thin fan and ultra-thin micropump mostly adopt a single bearing structure, and the shaft is positioned and supported by using a sliding bearing and a retaining ring or a PET sheet, the main defects of the mode are that the service life and the rotation precision are not high, when an impeller rotates, the shaft can generate sliding friction with a bearing wall and the PET sheet to cause abrasion, when the rotating speed is higher, the abrasion is more severe, and after the abrasion, the noise and the rotation precision of the whole machine are rapidly deteriorated, and the structure is mainly applied to occasions with low requirements on the service life. In addition, the clearance between the shaft and the sliding bearing causes the rotating component to generate deflection, and is not suitable for occasions with high precision requirements. In order to avoid the problem of bearing abrasion, non-contact bearing technologies such as a magnetic suspension bearing and a dynamic pressure bearing are also presented at present, but under the condition of small size, the bearing capacity of the magnetic suspension bearing and the dynamic pressure bearing is insufficient, the conditions such as vibration, impact and the like are difficult to deal with, the rotation precision of a non-contact bearing structure is not high, and the cost is high.

The double-ball bearing structure with the pre-tightening has good rotation precision, noise control and reliability, and is the mainstream choice for occasions with high precision, low noise and long service life requirements. However, the dual-bearing structure pre-tightening generally requires adding mechanical fixing structures or spiral springs at two ends of the shaft to eliminate the axial play, but the ultra-thin micro pump described in this embodiment has a small axial size, no space is provided at the shaft end to apply an additional structure, and the bearing hole on the ultra-thin micro pump base is not a through hole, so that it is difficult to apply the conventional pre-tightening structure at two ends of the shaft.

In summary, the common bearing structure form applied to the ultra-thin micropump can cause the problems of complex structure, increased thickness, low assembly precision, low structure reliability and the like. Therefore, it is highly desirable to improve the bearing structure of the ultra-thin micropump in the prior art to improve the rotation precision of the impeller of the ultra-thin micropump, so as to improve the service life of the ultra-thin micropump and reduce the noise during operation.

Disclosure of Invention

Aiming at the defects or the improvement requirements of the prior art, the invention provides a bearing structure of an ultrathin micropump and the ultrathin micropump, wherein the bearing structure suitable for the ultrathin micropump is correspondingly designed by combining the characteristics of the bearing structure and the working characteristics of the ultrathin micropump, the structures of key components of the bearing structure, such as a blind hole on a base, a shaft, a first ball bearing, a second ball bearing and a gasket, and the specific arrangement mode of the structures are researched and designed, the first ball bearing outer ring and the first ball bearing inner ring and the second ball bearing inner ring can be correspondingly constructed in a communicated manner to form a height difference in the vertical direction so as to eliminate the axial play of the first ball bearing and the second ball bearing when in working, so that the impeller of the ultrathin micropump can avoid the sliding friction between the shaft and the bearing wall and the impeller in the working process, thereby improving the rotating precision of the impeller of the ultrathin micropump, the bearing structure has the characteristics of simple structure, easy assembly, high precision and the like.

to achieve the above objects, according to one aspect of the present invention, there is provided a bearing structure of an ultra-thin micro-pump, including a blind hole provided on a base of the ultra-thin micro-pump, a shaft, a first ball bearing, a second ball bearing, and a washer, wherein,

The shaft is arranged at the center of the blind hole, the first ball bearing and the second ball bearing are sequentially sleeved on the shaft from bottom to top, the first ball bearing comprises a first ball bearing inner ring fixedly connected with the shaft, a first ball bearing outer ring fixedly connected with the side wall of the blind hole and a first ball arranged between the first ball bearing outer ring and the first ball bearing inner ring, the second ball bearing comprises a second ball bearing inner ring fixedly connected with the shaft, a second ball bearing outer ring fixedly connected with the side wall of the blind hole and a second ball arranged between the second ball bearing outer ring and the second ball bearing inner ring, the gasket is arranged between the first ball bearing inner ring and the second ball bearing inner ring or between the first ball bearing outer ring and the second ball bearing outer ring, and is used for enabling the first ball bearing inner ring and the second ball bearing outer ring and the second ball bearing inner ring to be in the vertical direction A height difference is formed to eliminate axial play of the first and second ball bearings when operating.

More preferably, the first ball bearing and the second ball bearing are both miniature ball bearings, the outer diameters of the first ball bearing outer ring and the second ball bearing outer ring are both 3mm to 5mm, and the heights of the first ball bearing inner ring, the first ball bearing outer ring, the second ball bearing inner ring and the second ball bearing outer ring are all 1mm to 3 mm.

Further preferably, the horizontal height of the first ball bearing outer race is greater than the horizontal height of the first ball bearing inner race; the horizontal height of the second ball bearing outer ring is smaller than that of the second ball bearing inner ring.

More preferably, the gasket is a rigid plastic sheet or a metal sheet, and has a thickness of 0.3mm to 0.5 mm.

As further preferred, the axle is including consecutive bottom shaft shoulder and connecting axle, the blind hole includes from last first cavity structure and the second cavity structure of arranging in proper order down, the axis collineation of first cavity structure and second cavity structure, just the diameter of first cavity structure is greater than the diameter of second cavity structure, the bottom shaft shoulder is located in the second cavity structure, just the thickness of bottom shaft shoulder is less than the thickness of second cavity structure, simultaneously, the level of bottom shaft shoulder top surface is less than the level of second cavity structure top surface.

Preferably, the end of the bottom shaft shoulder, which is not connected with the connecting shaft, is of a circular arc structure, and a gap is formed between the bottom shaft shoulder and the bottom surface of the second cavity structure.

Preferably, the first ball bearing and the second ball bearing are fixed between the side wall of the blind hole and the shaft in an interference fit or bonding manner.

According to another aspect of the present invention, an ultra-thin micropump is provided, including a bearing structure, a rotor sleeve, a volute, a base, an impeller, a motor magnet, and a motor stator, wherein the bearing structure is the above bearing structure, the rotor sleeve is disposed in a cavity formed by the volute and the base, the rotor sleeve is fixedly connected to a top end of the shaft, the impeller is disposed on an outer side wall of the rotor sleeve, the motor magnet is disposed on an inner side wall of the rotor sleeve, and a cavity for accommodating the motor stator is further disposed on a side of the base away from the volute.

As a further preferred option, the ultra-thin micropump further comprises a sealing ring and a control circuit, wherein the sealing ring is arranged between the volute and the base, and the control circuit is arranged at the bottom of the base.

Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:

1. The invention generates the stroke difference of the inner ring and the outer ring of the two ball bearings by the arrangement of the gasket, so that the balls are directly contacted with the inner ring and the outer ring of the bearings, the axial play of the ball bearings (the gap between the balls and the inner ring and the outer ring of the bearings) is eliminated, the positioning and pre-tightening of the double ball bearings are realized, and the bearing structure has low noise, long service life and high precision when a rotating part rotates.

2. The bearing structure has the advantages of small space requirement, simple structure, no mechanical fixing structure, installation from one direction and suitability for installation in a compact space.

3. The bearing structure has the advantages of high rotation precision, low noise and long service life. Because the pre-tightened double-ball bearing is used, the axial clearance of the ball bearing is eliminated, and the vibration and the eccentricity of the bearing structure are reduced.

4. The pre-tightening amount of the bearing structure is convenient to adjust. The stroke difference between the inside and the outside of the bearing can be adjusted by adjusting the thickness and the hardness of the gasket so as to control the pre-tightening degree of the bearing and adapt to different load conditions.

5. the ultrathin micropump has the advantages that the structural components such as the bearing structure, the rotor sleeve, the volute, the base, the impeller, the motor magnet, the motor stator and the like are improved, designed and integrated, so that the integral ultrathin micropump is more compact in structure and smaller in thickness, meanwhile, the adopted bearing structure generates the stroke difference of the inner ring and the outer ring of the two ball bearings through the arrangement of the gaskets, the balls are directly contacted with the inner ring and the outer ring of the bearings, the axial clearance of the ball bearings (the gap between the balls and the inner ring and the outer ring of the bearings) is eliminated, the positioning and pre-tightening of the double ball bearings are realized, and when the impeller rotates, the rotating component is prevented from generating sliding friction, and is low in noise, long in.

Drawings

FIG. 1 is a schematic structural diagram of a bearing structure of an ultra-thin micro-pump according to the present invention;

Fig. 2 is a schematic view of the installation of the bearing structure of the ultra-thin micro pump in the ultra-thin micro pump according to the present invention.

The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1-shaft, 2-second ball bearing, 3-washer, 4-first ball bearing, 5-base, 6-volute, 7-rotor housing, 8-impeller, 9-motor stator, 10-motor magnet, 2 a-second ball bearing inner ring, 2 b-second ball, 2 c-second ball bearing outer ring, 4 a-first ball bearing inner ring, 4 b-first ball, 4 c-first ball bearing outer ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and fig. 2, the micro pump comprises a blind hole formed on an ultra-thin micro pump base 5, a shaft 1, a first ball bearing 4, a second ball bearing 2 and a gasket 3, wherein the shaft 1 is arranged at the center of the blind hole, the first ball bearing 4 and the second ball bearing 2 are sequentially sleeved on the shaft 1 from bottom to top, the first ball bearing 4 comprises a first ball bearing inner ring 4a fixedly connected with the shaft 1, a first ball bearing outer ring 4c fixedly connected with the side wall of the blind hole, and a first ball bearing 4b arranged between the first ball bearing outer ring 4c and the first ball bearing inner ring 4a, the second ball bearing 2 comprises a second ball bearing inner ring 2a fixedly connected with the shaft 1, a second ball bearing outer ring 2c fixedly connected with the side wall of the blind hole, and a second ball bearing 2b arranged between the second ball bearing outer ring 2c and the second ball bearing inner ring 2a, the gasket 3 is arranged between the first ball bearing inner ring 4a and the second ball bearing inner ring 2a or between the first ball bearing outer ring 4c and the second ball bearing outer ring 2c, and is used for enabling the first ball bearing outer ring 4c and the first ball bearing inner ring 4a and the second ball bearing outer ring 2c and the second ball bearing inner ring 2a to form a height difference in the vertical direction so as to eliminate the axial play of the first ball bearing 4 and the second ball bearing 2 during working. The horizontal height of the first ball bearing outer ring 4c is greater than that of the first ball bearing inner ring 4 a; the horizontal height of the second ball bearing outer ring 2c is smaller than the horizontal height of the second ball bearing inner ring 2 a. Axle 1 is including consecutive bottom shoulder 1a and connecting axle 1b, the blind hole includes from last first cavity structure and the second cavity structure of arranging in proper order down, the axis collineation of first cavity structure and second cavity structure, just the diameter of first cavity structure is greater than the diameter of second cavity structure, bottom shoulder 1a is located in the second cavity structure, just bottom shoulder 1 a's thickness is less than the thickness of second cavity structure, simultaneously, the level of bottom shoulder 1a top surface is less than the level of second cavity structure top surface. One end, not connected with the connecting shaft 1b, of the bottom end shaft shoulder 1a is of an arc-shaped structure, and a gap is formed between the bottom end shaft shoulder and the bottom surface of the second cavity structure. And the first ball bearing 4 and the second ball bearing 2 are fixed between the side wall of the blind hole and the shaft 1 in an interference fit or bonding mode.

Specifically, the bearing structure of an ultra-thin micropump of the present invention comprises: including axle 1, first ball axle 2, packing ring 3, second ball bearing 4, base 5, wherein, one side that base 5 is close to spiral case 6 is equipped with the blind hole, this blind hole is the stairstepping structure, it includes first cavity structure and second cavity structure, wherein, first cavity structure sets up in the one side of being close to spiral case 6, the one side of spiral case 6 is being kept away from in the setting of second cavity structure, the axis collineation of first cavity structure and second cavity structure, and the diameter of first cavity structure is greater than the diameter of second cavity structure. Axle 1 sets up in the center of this blind hole, and axle 1 is the step shaft, and it includes consecutive bottom shaft shoulder 1a and connecting axle 1b, and wherein, has certain clearance between bottom shaft shoulder 1a and the base 5, and further, the one end that connecting axle 1b was kept away from to bottom shaft shoulder 1a is convex structure. The level of the top surface of the bottom end shoulder 1a is less than the level of the top surface of the second cavity structure. One end of the connecting shaft 1b is fixedly connected with the bottom end shaft shoulder 1a, and the other end is fixedly connected with the volute 6. The first ball bearing 2 and the second ball bearing 4 are sleeved on the connecting shaft 4b, wherein the first ball bearing 2 is arranged on one side close to the volute 6, and the second ball bearing 4 is arranged on one side close to the bottom end shoulder 4 a. The first ball bearing 2 and the second ball bearing 4 are separated by a washer 4. Specifically, the second ball bearing 4 includes a second ball bearing inner ring 4a, a second ball bearing outer ring 4b and a second ball bearing outer ring 4c, wherein the second ball bearing inner ring 4a is fixedly connected with the connecting shaft 1b, the second ball bearing outer ring 4c is fixedly connected with the base 5, a third cavity structure capable of accommodating the second ball bearing 4b is formed between the second ball bearing inner ring 4a and the second ball bearing outer ring 4c, and the second ball bearing 4b can roll in the third cavity structure. Further, in the present invention, the side surface of the second ball bearing inner race 4a is fixedly connected to the connecting shaft 1b, and the bottom portion thereof is fixedly connected to the bottom end shoulder 1a, so that a height difference is formed between the second ball bearing inner race 4a and the second ball bearing outer race 4c in the horizontal height direction. The first ball bearing 2 comprises a first ball bearing inner ring 2a, a first ball 2b and a first ball bearing outer ring 2c, wherein the first ball bearing inner ring 2a is fixedly connected with the connecting shaft 1b, the first ball bearing outer ring 2c is fixedly connected with the bottom shaft 5, a fourth cavity structure capable of containing the first ball 2b is formed between the first ball bearing inner ring 2a and the first ball bearing outer ring 2c, and the first ball 2b can roll in the fourth cavity structure. Meanwhile, a height difference can be formed between the first ball bearing outer ring 4c and the second ball bearing outer ring 2c in the vertical direction between the first ball bearing outer ring 4c and the first ball bearing inner ring 4a and between the second ball bearing outer ring 2c and the second ball bearing inner ring 2a, so that the axial play of the first ball bearing 4 and the second ball bearing 2 during working can be eliminated.

In the invention, the first ball bearing 2 and the second ball bearing 4 are both miniature ball bearings, the outer diameters of the first ball bearing 2 and the second ball bearing 4 are both 3 mm-5 mm, and the heights of the first ball bearing 2 and the second ball bearing 4 are both 1 mm-3 mm. Specifically, the outer diameters of the first ball bearing outer ring 4c and the second ball bearing outer ring 2c are both 3mm to 5mm, and the heights of the first ball bearing inner ring 4a, the first ball bearing outer ring 4c, the second ball bearing inner ring 2a, and the second ball bearing outer ring 2c are all 1mm to 3 mm.

The bearing structure can be used in an ultrathin micropump, and can also be used in other small mechanical devices with high alignment precision and the like. Specifically, the invention further provides an ultrathin micropump, which comprises a bearing structure, a rotor sleeve 7, a volute 6, a base 5, an impeller 8, a motor magnet 10 and a motor stator 9, wherein the bearing structure is the bearing structure provided by the invention, the rotor sleeve 7 is arranged in a cavity formed by the volute 6 and the base 5, the rotor sleeve 7 is fixedly connected with the top end of the shaft 1, the impeller 8 is arranged on the outer side wall of the rotor sleeve 7, and one side, away from the volute 6, of the base 5 is provided with an annular mounting groove which takes the center of the shaft 1 as an axis, the mounting groove is used for placing the motor stator 9. The side of the base 5 far away from the volute 6 is also provided with a circuit installation groove for installing and arranging a control circuit. The motor magnet 10 is arranged on the inner side wall of the rotor sleeve 7, and a cavity for accommodating the motor stator 9 is further arranged on one side, far away from the volute 6, of the base 5.

Further, the volute 6 and the base 5 of the ultrathin micropump are sealed by adopting a sealing ring, and correspondingly, a sealing groove for mounting the sealing ring is formed in the surface, butted with the base 5, of the volute 6.

The bearing structure of the ultrathin micropump is applied to the ultrathin micropump and used for bearing the impeller of the ultrathin micropump, so that the impeller can be kept stable in a horizontal plane when in work to overcome the friction between the impeller and a wall surface, the service life of the ultrathin micropump is prolonged, the noise of the ultrathin micropump when in work is reduced, and meanwhile, the installation adaptability needs to be ensured to facilitate the assembly of the ultrathin micropump.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.