CN111946663A - Miniature multistage formula impeller - Google Patents

Abstract

The invention discloses a miniature multi-segment impeller, comprising a first reinforcement ring, a second reinforcement ring arranged on one side of the first reinforcement ring, a first centrifugal impeller installed on the first reinforcement ring, and the first reinforcement ring. The centrifugal impeller is provided with a first hub, the center of the first hub is provided with a shaft core, the side of the first hub is provided with a tenon, the second reinforcement ring is provided with a third centrifugal impeller, the third The centrifugal impeller is equipped with a second hub, the second hub is equipped with a second cross-flow impeller, the second hub is provided with a socket, and the bottom of the socket is provided with a second hub inner hole, the tenon Inserted into the socket, the shaft core is inserted into the inner hole of the second hub and has an interference fit. The multi-segment impeller includes three coaxial impellers, making full use of the internal flow channel of the impeller, improving the efficiency of the impeller and improving the intake of the fan. Air volume, reduce fluid leakage and eddy current loss, improve fluid efficiency, and improve fan performance per unit volume.

Description

A miniature multi-stage impeller

technical field

The invention relates to the technical field of impellers, in particular to a miniature multi-section impeller.

Background technique

The volume of electronic products is getting smaller and smaller, resulting in more and more heat generated by the chip per unit volume. As the main heat dissipation element, the performance improvement of the fan is more important. The performance optimization of the impeller, the main working part in the fan, is particularly important. There are three types of fans commonly used at present: axial flow fans, centrifugal fans and cross flow fans.

Axial flow fan adopts axial flow impeller, and the direction of inlet and outlet air is the same, which is a typical single-sided air inlet flow field, which is characterized by large air volume but low static pressure; centrifugal fan adopts centrifugal impeller, and the inlet and outlet directions are perpendicular to each other. The double-sided air inlet is characterized by large air volume but high static pressure; the cross-flow fan adopts a cross-flow impeller with a longer axial direction, and the air inlet and outlet directions are in the same plane, which is also a typical single-sided air inlet flow field. Low; the impellers of the above fans are not suitable for use in small consumer electronic products that have high requirements for flow.

The impeller is a key component in the fan. In terms of improving the ventilation efficiency of the fan, the focus of the optimal design is the impeller, followed by the various shapes of the blades and the number of blades. Due to the long axial length of the impeller of the fan, the impeller runs unstable and the fluid Low efficiency, large fluid leakage and eddy current loss, a new type of multi-segment impeller is designed, making full use of the advantages of each segment of the impeller, and combining them to better solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and provide a miniature multi-segment impeller, the multi-segment impeller comprises three coaxial impellers, and the rotation of the impeller promotes fluid flow, makes full use of the internal flow channel of the impeller, and improves the efficiency of the impeller, Increase the air intake of the fan, reduce fluid leakage and eddy current loss, improve fluid efficiency, and improve the performance of the fan per unit volume.

In order to achieve the above purpose, the present invention provides a miniature multi-segment impeller, which includes a first reinforcement ring, a second reinforcement ring installed on one side of the first reinforcement ring, and a first centrifugal impeller is installed on the first reinforcement ring. , the first centrifugal impeller is provided with a first hub, the center of the first hub is provided with a shaft core, the side of the first hub is provided with a tenon, and the second reinforcement ring is provided with a third centrifugal impeller , the inside of the third centrifugal impeller is equipped with a second hub, the second hub is equipped with a second cross-flow impeller, the inside of the second hub is provided with a socket, and the lower part of the socket is provided with a second hub The tenon is inserted into the mortise hole, and the shaft core is inserted into the inner hole of the second hub with interference fit.

Preferably, the first centrifugal impeller is provided with first blades arranged in a circumferential array, the second cross-flow impeller is provided with second blades arranged in a circumferential array, and the third centrifugal impeller is provided with a circumferential array. The third blade, the first blade is installed between the first reinforcing ring and the first hub and bends inward, the second blade is installed between the first hub and the second hub and bends inward, The third blade is installed between the second hub and the second reinforcing ring and is bent inward.

Preferably, the diameters of the first reinforcement ring and the second reinforcement ring are larger than the diameters of the first hub and the second hub.

Preferably, the first blade is divided into an outer part of the first blade and an inner part of the first blade by the first hub, the surface of the outer part of the first blade is connected with the outer surface of the first reinforcement ring, and the first blade The inner portion is connected to the first hub.

Preferably, the third blade is divided into an outer part of the third blade and an inner part of the third blade by the second hub, the surface of the outer part of the third blade is connected with the outer surface of the second reinforcing ring, and the third blade The inner portion is connected to the second hub.

Preferably, one side of the second blade is connected to the first hub, and the other side is connected to the second hub.

Preferably, the second hub is provided with a first accommodating cavity for accommodating the installation of the motor, one end of the shaft core is provided with a first bearing, the other end is provided with a second bearing, and the first bearing is mounted on The middle of the first centrifugal impeller.

Preferably, there are more than 30 first blades, second blades and third blades.

Preferably, several blind holes for reducing the overall weight of the impeller are provided on the first reinforcing ring and the second reinforcing ring.

Compared with the prior art, the beneficial effects of the present invention are:

1. The present invention is equipped with a first centrifugal impeller, a second cross-flow impeller and a third centrifugal impeller to give full play to the fluid performance advantages of each impeller. The first centrifugal impeller and the third centrifugal impeller on both sides provide high-pressure airflow, and the middle The second cross-flow impeller provides a large flow of air. The two combine to provide a high-pressure and large-flow air flow, making full use of the space of the impeller and the internal flow channel, improving the working efficiency of the impeller and the air intake of the fan, reducing fluid leakage and damage. Eddy current loss, improve fluid efficiency.

2. In the present invention, the motor is installed on the first accommodating cavity inside the second hub, which effectively reduces the volume of the fan and improves the performance of the fan per unit volume. The distance between the first bearing and the second bearing makes the impeller run more smoothly, with less vibration and longer life. Under the same size and noise, the flow rate is increased by 70%, and the static pressure is increased by 30%.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the three-dimensional structure schematic diagram of a kind of miniature multi-segment impeller provided by the present invention;

Fig. 2 is the front structure schematic diagram of a kind of miniature multi-section impeller provided by the present invention;

3 is a schematic cross-sectional view of a miniature multi-segment impeller assembled inside the fan provided by the present invention;

4 is a schematic diagram of the exploded structure of a miniature multi-segment impeller provided by the present invention;

5 is a schematic exploded cross-sectional view of a miniature multi-segment impeller provided by the present invention;

Fig. 6 is the front sectional schematic diagram of a kind of miniature multi-segment impeller provided by the present invention;

7 is a schematic diagram of an exploded three-dimensional structure of a miniature multi-segment impeller provided by the present invention. Included in the figure are:

11-first reinforcement ring, 12-second reinforcement ring, 2-first centrifugal impeller, 31-first hub, 4-shaft core, 311-tenon, 6-second cross-flow impeller, 5-third centrifugal impeller, 32-the second hub, 321-the eye, 322-the inner hole of the second hub, 21-the first blade, 61-the second blade, 51-the third blade, 211-the outer part of the first blade, 212-the first blade Inner part, 511-outer part of third blade, 512-inner part of third blade, 91-motor, 7-first accommodating cavity, 81-first bearing, 82-second bearing, 9-blind hole.

Detailed ways

The technical solutions in this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment of the present invention. Obviously, the described embodiment is an embodiment of the present invention, not all of them. this embodiment. Based on the present embodiment of the present invention, all other present embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 7 , the present invention provides a miniature multi-segment impeller, including a first reinforcing ring 11 , a second reinforcing ring 12 installed on one side of the first reinforcing ring 11 , the first reinforcing ring 11 A first centrifugal impeller 2 is installed on it, a first hub 31 is installed on the first centrifugal impeller 2, a shaft core 4 is installed in the center of the first hub 31, and a tenon 311 is installed on one side of the first hub 31 , a third centrifugal impeller 5 is installed on the second reinforcing ring 12, a second hub 32 is installed inside the third centrifugal impeller 5, and a second cross-flow impeller 6 is installed on the second hub 32. The first centrifugal impeller 2 and the third centrifugal impeller 5 can choose the same blade shape or different blade shapes according to the actual application. If the first centrifugal impeller 2 and the third centrifugal impeller 5 have the same blade shape, the multi-stage The impeller consists of two types of impellers. In this embodiment, the first centrifugal impeller 2 and the third centrifugal impeller 5 have the same blade shape; if the first centrifugal impeller 2 and the third centrifugal impeller 5 have different blade shapes, the multi-segment impeller consists of It is composed of three types of airfoils; in other embodiments, the impeller can also be composed of more than three types of airfoils.

The present invention provides a miniature multi-segment impeller consisting of two parts, as shown in Figures 4 to 7 , the shaft core 4 and the first centrifugal impeller 2 are fixed together by injection molding, and the third centrifugal impeller 5 Independent injection molding; the assembly method is as follows: the second hub 32 is provided with a socket 321, the lower part of the socket 321 is provided with a second hub inner hole 322, and the tenon 311 is inserted into the socket 321, through the tenon 311 The axial and radial positioning is carried out with the cooperation of the 90 eye 321. At the same time, the shaft core 4 is inserted into the inner hole 322 of the second hub and interference fit. Through the interference between the shaft core 4 and the inner hole 322 of the second hub In cooperation, the first centrifugal impeller 2 and the third centrifugal impeller 5 are assembled together.

The interiors of the first centrifugal impeller 2, the second cross-flow impeller 6 and the third centrifugal impeller 5 are communicated with each other, and the first centrifugal impeller 2 makes the airflow flow into the first centrifugal impeller 2 from the upper air inlet, along the first centrifugal impeller 2. The impeller 2 rotates around and flows out from the first centrifugal impeller 2 in the tangential direction. The inflow direction of the airflow is perpendicular to the outflow direction. The second cross-flow impeller 6 makes the airflow flow into the second cross-flow impeller 6 from the radial direction, along the second cross-flow impeller 6 . The second cross-flow impeller 6 rotates around and flows out from the second cross-flow impeller 6 in the radial direction. The inflow and outflow directions of the air flow are in the same plane. The third centrifugal impeller 5 makes the air flow into the third centrifugal impeller 5 from the air inlet at the lower end. , rotates around the third centrifugal impeller 5, flows out from the tangential direction of the third centrifugal impeller 5, and the direction of airflow inflow is perpendicular to the direction of outflow, the miniature multi-stage impeller of the present invention The impeller 6 is composed of the third centrifugal impeller 5, which gives full play to the fluid performance advantages of each impeller. The first centrifugal impeller 2 and the third centrifugal impeller 5 on both sides provide high-pressure airflow, and the second cross-flow impeller 6 in the middle provides high-flow airflow. , the two are combined together to provide high-pressure and large-flow airflow, making full use of the space of the impeller and the internal flow channel, improving the work efficiency of the impeller and the air intake of the fan, reducing fluid leakage and eddy current loss, and improving fluid efficiency.

The first centrifugal impeller 2 is provided with first blades 21 arranged in a circumferential array, the second cross-flow impeller 6 is provided with second blades 61 arranged in a circumferential array, and the third centrifugal impeller 5 is provided with a circumferential array. The third blade 51 is arranged, the first blade 21 is installed between the first reinforcing ring 11 and the first hub 31 and is bent inward, and the second blade 61 is installed in the first hub 31 and the second hub 31 32 and bend inward, the third blade 51 is installed between the second hub 32 and the second reinforcing ring 12 and bends inward.

The diameters of the first reinforcement ring 11 and the second reinforcement ring 12 are larger than the diameters of the first hub 31 and the second hub 32 , and a first centrifugal impeller 2 is installed between the first reinforcement ring 11 and the first hub 31 . , a second cross-flow impeller 6 is installed between the first hub 31 and the second hub 32, and a third centrifugal impeller 5 is installed between the second hub 32 and the second reinforcing ring 12, which flows into the second hub from the upper end. The high-pressure airflow in the first centrifugal impeller 2, the high-pressure airflow flowing into the third centrifugal impeller 5 from the lower end, and the large-flow airflow flowing into the second cross-flow impeller 5 from the middle converge together and flow out from the tangential direction.

The first blade 21 is divided into a first blade outer part 211 and a first blade inner part 212 by the first hub 31, the surface of the first blade outer part 211 is connected with the outer surface of the first reinforcement ring 11, the first blade A blade inner portion 212 is connected to the first hub 31 .

The third blade 51 is divided into a third blade outer part 511 and a third blade inner part 512 by the second hub 32, the surface of the third blade outer part 511 is connected with the outer surface of the second reinforcing ring 12, the third blade The three-blade inner portion 512 is connected to the second hub 32 .

One side of the second blade 61 is connected to the first hub 31 , and the other side is connected to the second hub 32 .

The second hub 32 is provided with a first accommodating cavity 7 for accommodating the installation of the motor 91 , one end of the shaft core 4 is provided with a first bearing 81 , and the other end is provided with a second bearing 82 , the first bearing 81 Installed in the middle of the first centrifugal impeller 2, the motor 91 is installed on the first accommodating cavity 7 inside the second hub 32, which effectively reduces the volume of the fan and improves the performance of the fan per unit volume. The first bearing 81 is installed in the middle of the first centrifugal impeller 2, which reduces the distance between the first bearing 81 and the second bearing 82, making the impeller run more smoothly, with less vibration and longer life. Under the same size and noise, the flow rate It is increased by 70%, and the static pressure is increased by 30%.

The first blade 21 , the second blade 61 and the third blade 51 are all provided with more than 30 blades, and the optimum number of blades is selected through verification through experiments.

The first reinforcing ring 11 and the second reinforcing ring 12 are provided with several blind holes 9 for reducing the overall weight of the impeller. The blind holes 9 are provided to reduce part of the weight of the impeller, so as to control the quality of the impeller.

To sum up, the beneficial effects of the present invention are:

The present invention is equipped with a first centrifugal impeller 2, a second cross-flow impeller 6 and a third centrifugal impeller 5, so as to give full play to the advantages of the fluid performance of each impeller, and the first centrifugal impeller 2 and the third centrifugal impeller 5 on both sides provide high-pressure airflow , the second cross-flow impeller 6 in the middle provides a large flow of air, and the two combine to provide a high-pressure large-flow air flow, making full use of the space of the impeller and the internal flow channel, improving the work efficiency of the impeller and the air intake of the fan. Reduce fluid leakage and eddy current loss, and improve fluid efficiency; the present invention installs the motor 91 on the first accommodating cavity 7 inside the second hub 32, which effectively reduces the volume of the fan and improves the performance of the fan per unit volume. The first bearing 81 is installed in the middle of the first centrifugal impeller 2, which reduces the distance between the first bearing 81 and the second bearing 82, making the impeller run more smoothly, with less vibration and longer life. Under the same size and noise, the flow rate It is increased by 70%, and the static pressure is increased by 30%.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications are also regarded as the present invention. The scope of protection of the invention.

Claims (9)

1. A miniature multi-segment impeller, characterized in that it comprises a first reinforcement ring (11), a second reinforcement ring (12) installed on one side of the first reinforcement ring (11), and the first reinforcement ring ( 11) A first centrifugal impeller (2) is installed on it, a first hub (31) is installed on the first centrifugal impeller (2), and a shaft core (4) is installed in the center of the first hub (31), A tenon (311) is provided on one side of the first hub (31), a third centrifugal impeller (5) is installed on the second reinforcing ring (12), and a third centrifugal impeller (5) is installed inside the third centrifugal impeller (5). A second hub (32), a second cross-flow impeller (6) is mounted on the second hub (32), and a socket (321) is provided inside the second hub (32), and the socket (321) The lower part is provided with a second hub inner hole (322), the tenon (311) is inserted into the socket (321), and the shaft core (4) is inserted into the second hub inner hole (322) with interference fit. 2. A miniature multi-segment impeller according to claim 1, wherein the first centrifugal impeller (2) is provided with first blades (21) arranged in a circumferential array, and the second cross-flow impeller ( 6) A second vane (61) arranged in a circumferential array is provided, the third centrifugal impeller (5) is provided with a third vane (51) arranged in a circumferential array, and the first vane (21) is installed in the The first reinforcing ring (11) and the first hub (31) are bent inward, and the second blade (61) is installed between the first hub (31) and the second hub (32) and is bent inward Bending, the third blade (51) is installed between the second hub (32) and the second reinforcing ring (12) and is bent inward. 3. A miniature multi-segment impeller according to claim 1, characterized in that the diameters of the first reinforcing ring (11) and the second reinforcing ring (12) are larger than that of the first hub (31) and the second hub (32) diameter. 4. A miniature multi-segment impeller according to claim 2, wherein the first blade (21) is divided into a first blade outer part (211) and a first blade inner part by the first hub (31) (212), the surface of the first blade outer part (211) is connected with the outer surface of the first reinforcing ring (11), and the first blade inner part (212) is connected with the first hub (31). 5. The miniature multi-segment impeller according to claim 2, wherein the third blade (51) is divided into a third blade outer part (511) and a third blade inner part by the second hub (32) (512), the surface of the third blade outer part (511) is connected with the outer surface of the second reinforcing ring (12), and the third blade inner part (512) is connected with the second hub (32). 6. The miniature multi-segment impeller according to claim 2, wherein one side of the second blade (61) is connected to the first hub (31), and the other side is connected to the second hub (32). 7 . The miniature multi-segment impeller according to claim 1 , wherein the second hub ( 32 ) is provided with a first accommodating cavity ( 7 ) for accommodating the installation of the motor ( 91 ), and the shaft core (4) A first bearing (81) is installed at one end, and a second bearing (82) is installed at the other end, and the first bearing (81) is installed in the middle of the first centrifugal impeller (2). 8 . The miniature multi-segment impeller according to claim 1 , wherein more than 30 first blades ( 21 ), second blades ( 61 ) and third blades ( 51 ) are provided. 9 . 9. The miniature multi-segment impeller according to claim 1, characterized in that, the first reinforcing ring (11) and the second reinforcing ring (12) are provided with several bars for reducing the overall weight of the impeller. Blind hole (9).

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