WO2014117288A1

WO2014117288A1 - Composite impeller and air supply device thereof

Info

Publication number: WO2014117288A1
Application number: PCT/CN2013/000088
Authority: WO
Inventors: 陈耀乾
Original assignee: Chen Yao-Chien
Priority date: 2013-01-29
Filing date: 2013-01-29
Publication date: 2014-08-07

Abstract

A composite impeller and an air supply device thereof. The composite impeller comprises: a casing; multiple centrifugal blades, fixedly arranged in the casing, wherein a rotation stroke range of the centrifugal blades defines a centrifugal air supply action region; multiple axial flow blades, radially and uniformly configured on the radial periphery of the casing, wherein a rotation stroke range of the axial flow blades defines an axial flow air supply action region; and a drive unit, for enabling the centrifugal blades and the axial flow blades to rotate synchronously so as to respectively produce a centrifugal air flow and an axial flow air flow. At least one part of the centrifugal air flow enters the axial flow air supply action region from the centrifugal air supply action region, and is mixed with the axial flow air flow. The mixed air flows are pushed by the axial flow blades in rotation, so that the flowing speed is axially accelerated, and the flow quantity and air pressure can be increased at the same rotation speed.

Description

Compound impeller and air supply device thereof

The invention relates to a blowing device, in particular to a composite impeller and an air blowing device thereof. Background technique

Generally, the blower is roughly divided into a centrifugal blower and an axial flow blower according to the direction in which the airflow passes through the blade. The airflow direction of the centrifugal blower enters along the axial direction of the impeller, and is discharged radially to the outer circumference perpendicular to the axle. It mainly uses the centrifugal effect to pressurize the fluid, so it can generate high pressure and has the characteristics of low air volume and high wind pressure. The airflow of the axial flow fan enters along the axial direction of the impeller and is directly discharged through the blade in the axial direction of the wheel. Therefore, when the blade rotates, the suction surface and the pressure surface are respectively formed on both sides of the blade to drive the airflow, so the pressure is small. However, due to its large area of action, it has a high flow rate and high air volume and low wind pressure.

Although the above two types of blowers have the characteristics of "high air volume, low wind pressure" and "low air volume and high wind pressure J, there are actually insurmountable problems. The problem is that the centrifugal blower has airflow. The problem of insufficient flow, the axial flow blower has a problem of low wind pressure.

Therefore, there is a structure for increasing the wind pressure or the amount of wind, and it is expected that the above disadvantages can be eliminated by an innovative design.

In the case of centrifugal blowers, such as Taiwan Patent No. M366881 and No. 1361250, etc. The disclosure of the Chinese Patent No. M366881 discloses that a plurality of baffles arranged in a swirling manner are arranged on the outer circumference of the centrifugal blade, and the airflow is passed through the centrifugal blade and the plurality of baffles. By discharging, by the diversion of the plurality of baffles, the pressure of the airflow in the flow path entering the baffle can be increased, and the exit velocity of the airflow can be increased, thereby increasing the wind speed and the air volume. Among them, the disclosure of the Chinese Patent No. 1361250 discloses that an opening is provided in the low pressure region of the outer casing of the centrifugal blower, so that the inner side of the outer casing is open to the atmosphere, and the air intake area is increased by the aforementioned opening, and the centrifugal blower is increased. The amount of intake air.

In the case of an axial flow blower, such as the Taiwan Patent Publication No. 535859, No. 592343, No. M241515, No. M372898, and the like. Among them, the disclosures of Taiwan Patent Publication Nos. 535859, No. 592343, No. M241515, etc., mainly open an opening through which the airflow can be introduced in the front part of the outer casing of the axial flow blower, so that the inside of the outer casing is open to the atmosphere. With the aforementioned opening The hole increases the intake area and increases the intake air volume of the axial flow fan. According to the disclosure of the patent No. M372898, a plurality of baffles fixed on the inner surface of the outer casing are disposed on the air outlet side (rear side) of an impeller disposed in a casing, so that the airflow is sent out through the impeller. And then flowing out along the flow guiding piece, by means of the aforementioned plurality of baffles to increase the flow velocity of the airflow.

As disclosed in Taiwan Patent No. 1289630, it combines an impeller for a turbofan and a casing for an axial fan to obtain a high static air by means of an impeller for a turbofan, and is used for an axial flow fan. The housing expands the discharge area.

As disclosed in Taiwan Patent No. M262754, the axial flow type and the centrifugal impeller are integrated to improve the flow rate and wind pressure generated by the centrifugal impeller, and the flow passage width is narrowed to increase the Flow rate, the disadvantage of this method is that although the flow velocity of the airflow can be increased, the air intake area cannot be increased to increase the flow rate.

However, according to the conventional technique, although the air blowing speed and the air volume can be increased, by providing a technique for introducing the opening of the airflow to the blower casing, it is possible to provide an increase in the wind speed and the air volume, which is suitable for a small blower without Suitable for large blowers. Therefore, there is a problem of producing product suitability. The above-mentioned Taiwan Patent No. M366881 also has the problem of applicability as described above. Further, the above-mentioned Taiwan Patent No. M372898 has a disadvantage in that the provision of the above-mentioned baffle plate can increase the flow velocity of the airflow, but it is not possible to increase the intake air area to increase the flow rate.

Furthermore, in addition to the above two conventional blower structures, the diagonal flow impeller has both axial flow and centrifugal characteristics, and is applied to the blower structure. However, the diagonal flow structure Since a plurality of inclined blades that are radially arranged and extend toward the air outlet and expand outward are used, there is a disadvantage that the volume of the device is increased due to the increase in space.

Therefore, how to improve the overall working efficiency of the blower to generate a large amount of air and increase the wind pressure is one of the important issues at present. Summary of the invention

The present invention has been made to solve the above problems of the prior art, and an object thereof is to provide a feature of an axial flow type and a centrifugal type air blower, which can increase the air volume and the wind pressure at the same rotation speed without excessively increasing at the same time. A composite impeller with a device space and its air supply device.

To achieve the above object, the present invention provides a composite impeller comprising:

a casing having an inlet in an axial direction of the center of rotation and a plurality of outlets in a radial direction of the central axis of rotation; a plurality of centrifugal blades uniformly arranged around the central axis of rotation and fixed to an inner surface of the casing, and rotating to generate a centrifugal airflow which is entered by the inlet of the casing and discharged from the plurality of outlets, The range of the rotational motion of the plurality of centrifugal blades is defined to form a centrifugal air supply action zone;

a plurality of axial flow vanes centered on the central axis of rotation and radially uniformly disposed around a radial direction of the casing, and rotating to generate an axial flow of air along an axial direction of the rotation center, the plurality of axes The range of the rotational motion of the flow vane defines an axial flow air supply zone;

a driving unit that drives the casing to rotate around the rotating central axis to synchronously rotate the plurality of centrifugal blades and the plurality of axial flow blades;

Wherein the aforementioned radial direction is perpendicular to the central axis of rotation;

The outlet of the casing communicates with the centrifugal air supply zone and the axial air supply zone; wherein, when the driving unit drives the plurality of centrifugal blades and the plurality of axial blades to rotate synchronously, the centrifugal is performed The airflow is discharged from the centrifugal blowing action zone through the outlet of the casing such that at least a portion of the centrifugal airflow enters the axial flow air supply zone and is mixed with the axial flow airflow, and the at least a portion of the centrifugal airflow is simultaneously subjected to the The plurality of axial flow blades are rotationally pushed to accelerate the axial direction of the rotation center.

The composite impeller, wherein the casing has a pair of side plates covering both sides of the plurality of centrifugal blades, and the inlet is provided in one of the pair of side plates, between the pair of side plates And the plurality of outlets are provided on an outer peripheral side of the multi-centrifugal blade.

The composite impeller, wherein an outlet of the casing communicates with the centrifugal air supply zone and the axial air supply zone.

The composite impeller, wherein the width of the end of each axial flow blade is greater than or equal to the width of the outlet of the casing in the axial direction of the central axis of rotation.

The composite impeller, wherein an inner circumference of the inlet of the casing has a diameter larger than a diameter of an inner end of the centrifugal blade.

The composite impeller, wherein each of the axial flow blades includes a blade portion and a fixing portion, and is fixed to a radial periphery of the casing by a fixing seat, the fixing seat includes a first seat body and a first body a two-seat body, wherein the first seat body and the second seat body are interlocked with each other, and the first seat body and the second seat body are respectively provided with corresponding grooves corresponding to each axial flow blade. Fixed part.

In the composite impeller, the cross-sectional shape of the fixing portion of each of the axial flow vanes is circular or polygonal.

The composite impeller, wherein at least one fastener is further utilized to pass through the machine separately The shell, the first seat body and the second seat body are locked against the locking holes provided by the lock body. The present invention also provides an air supply device, which is provided with a composite impeller in a cylindrical outer casing, wherein the two ends of the tubular outer casing are respectively an air inlet and an air outlet, and The composite impeller rotates to drive air from the air inlet and then from the air outlet.

The air blowing device, wherein the inside of the cylindrical outer box is further provided with a bracket for supporting the driving unit.

The invention has the advantages of: having the characteristics of an axial flow type and a centrifugal type blower, and can increase the air volume and the wind pressure at the same rotation speed without excessively increasing the space of the device. DRAWINGS

Figure 1 is a perspective view showing the appearance of a composite impeller of the present invention;

2 is an exploded perspective view of the composite impeller of the present invention;

Figure 3 is a longitudinal cross-sectional view of the composite impeller of the present invention including a central axis X;

Figure 4 is a plan view of the composite impeller of the present invention as seen from the suction side;

Figure 5 is a left side view of Figure 1;

Figure 6 is a perspective perspective view of the composite impeller of the present invention and its air blowing device;

Fig. 7 is a schematic view showing the operation of the composite impeller and the air blowing device thereof according to the present invention.

DESCRIPTION OF REFERENCE NUMERALS: composite impeller 1; casing 10; inlet 1 1; inner circumference 1 1a; outlet 12; width 12a; side plates 13, 14; centrifugal blade 20; inner end 20a; centrifugal air supply zone 21; Axial flow blade 30; width 30a; axial flow air supply zone 31; blade portion 32; fixing portion 33; drive unit 40; fixing base 50; first body 51; second base 52; groove 51 1 , 521 ; lock 60; locking hole 61; cylindrical outer case 70; air inlet 71; air outlet 72; bracket 73. detailed description

In order to make the present invention clearer and more detailed, the structure of the present invention and its technical features are detailed as follows with reference to the following drawings:

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring to Figures 1 through 7, a preferred embodiment of the present invention will be described in detail. In the description of the present invention, the "axial direction" is the direction of the parallel rotation axis, and the "radial direction" is the direction of the vertical rotation axis.

As shown in FIG. 1, the composite impeller 1 has a plurality of centrifugal blades 20 disposed around the central axis X and fixed to the inside of the casing 10, and is disposed at the periphery of the central axis X and fixed to the radially outer periphery of the casing 10. A plurality of axial flow vanes 30. The so-called centrifugal blade rotates to make the air toward the central axis X (the center of rotation of the impeller) The blade structure of the shaft is discharged in the radial direction. Further, the so-called axial flow vane is rotated to cause the air to be discharged toward the blade structure in a direction parallel to the central axis X (the rotational center axis of the impeller).

The composite impeller 1 of the present invention incorporates a centrifugal and axial flow mixed-flow impeller, and the air is sucked from the front side of the composite impeller 1 by centrifugal rotation of the centrifugal vane 20 and the axial flow vane 30 shown in FIG. After the airflow is mixed with the axial flow, it is sent to the rear side to generate a flow in the direction of the central axis X. In the central axis X direction described below, the front side in Fig. 1 on the suction air side is referred to as the r intake side J, and the rear side in Fig. 1 on the discharge air side is referred to as the "exhaust side". Compared with the prior art, it is possible to provide more air volume and wind pressure at the same rotational speed.

As shown in Figs. 1 to 4, the composite impeller 1 includes a casing 10, a plurality of centrifugal blades 20, a plurality of axial flow blades 30, and a drive unit 40.

The casing 10 is provided with an inlet 1 1 on one side in the direction (axial direction) in which the center axis X extends, and a plurality of outlets 12 are provided around the radial direction of the center axis X.

The plurality of centrifugal blades 20 are centered on the central axis X and uniformly arranged around the central axis X in the circumferential direction, and are fixed to the inner surface of the casing 10 by using the plurality of centrifugal blades 20 as the central axis X The center is rotated counterclockwise in FIG. 4 (as in the direction of arrow R1 in FIG. 4), and air is drawn from the inlet 11 of the casing 10 to move air from the plurality of centrifugal blades 20 to each other. The centrifugal airflow is sent out in the centrifugal direction, and the air is discharged from the outlet 12 (i.e., the air is taken in from the front side of the composite impeller 1 in Figs. 3 and 4, and is radially sent out through the centrifugal blade 20 toward the central axis X. The centrifugal airflow), wherein the range of the rotational motion of the plurality of centrifugal blades 20 is defined to form a centrifugal air supply zone 21. In the present embodiment, the diameter of the inner circumference 11a of the inlet 11 of the casing 10 is larger than the diameter of the inner end 20a of the centrifugal blade 20.

The plurality of axial flow vanes 30 are centered around the central axis X and radially uniformly disposed around the radial direction of the casing, by rotating the plurality of axial flow vanes 30 with the central axis X as the center and counterclockwise in FIG. (as in the direction of arrow R1 in Fig. 4), an air flow is generated along the central axis X direction (i.e., from the front side of the composite impeller 1 in Figs. 3, 4, and through the axial flow vanes 30). The axial flow is sent toward the rear side, wherein the range of the rotational motion of the plurality of axial blades 30 defines an axial flow supply zone 31.

The driving unit 40 is composed of a motor and is disposed on the opposite side of the casing 10 and disposed on the opposite side of the casing 10, and is connected to the casing 10, and drives the casing 10 counterclockwise with the central axis X as a center ( Rotation in the direction of the arrow R1 in FIG. 4 to rotate the plurality of centrifugal blades 20 and the plurality of axial flow blades 30 in synchronization. Further, the casing 10 has a pair of side plates 13, 14 covering both sides of the plurality of centrifugal blades 20, and the inlet plate 1 is provided in one of the pair of side plates 13, 14 The plurality of outlets are provided between the side plates 13 and 14 and on the outer peripheral side of the plurality of centrifugal blades 20.

As shown in Fig. 3, the outlet 11 of the casing 10 communicates with the centrifugal air supply zone 21 and the axial air supply zone 31.

As shown in FIG. 2, each of the axial flow blades 30 includes a blade portion 32 and a fixing portion 33, and is fixed to a radial periphery of the casing 10 by a fixing base 50. The fixing base 50 includes a first seat. The first base body 51 and the second base body 52 are respectively correspondingly coupled to each other, and the first base body 51 and the second base body 52 are respectively provided with a corresponding one. The grooves 51 1 and 521 are provided for fixing portions 33 of the respective axial flow vanes 30. The cross-sectional shape of the fixing portion 33 of each of the axial flow blades 30 may be circular or polygonal and corresponding to the shapes of the grooves 51 1 and 521 of the first base body 51 and the second base body 52, so that the fixing portion 33 can be The first seat body 51 and the recesses 51 1 and 521 of the second seat body 52 are tightly fitted. As shown in FIG. 5, the width 30a of the end of each axial blade 30 (that is, the width of the blade portion 32 near the fixed portion 33) is greater than or equal to the width 12a of the outlet 12 of the casing 10 in the axial direction of the central axis X. .

When assembled, the fixing portion 33 of each of the axial flow vanes 30 can be correspondingly inserted into the recesses 51 1 and 521 of the first base body 51 and the second base body 52, and then passed through at least one fastener 60 such as a bolt. The locking holes 61 provided in the corresponding locking members 60 are locked on the casing 10, the first base 51 and the second base 52, so that the axial blades 30 and the casing 10 can be stably locked. Solidified.

In addition, an indication scale (not shown) may be disposed on the bottom surface of the fixing portion 33 of each of the axial flow vanes 30. The indication scale may be used to identify the installation angle of each axial flow vane 30 when the axial flow vanes 30 are mounted. The axial flow vanes 30 can be easily positioned at the same mounting angle to enhance the efficiency and accuracy of mounting the axial flow vanes 30.

As shown in FIG. 3 and FIG. 4, when the driving unit 40 is rotated counterclockwise (rotating in the direction of the arrow R1 in FIG. 4), the casing 10, the plurality of centrifugal blades 20, and the plurality of axial flow blades 30 are integrated. And rotating counterclockwise, whereby air can be taken in from the front side (suction side) of the composite impeller 1 so that a part of the air enters the casing 10 from the inlet 11 of the casing 10, and then with the plurality of centrifugations. The blade 20 rotates and is discharged toward the outlet 12 of the casing 10 (i.e., is sent from the outer peripheral side of the plurality of centrifugal blades 20 toward the central axis X) to form a centrifugal air flow, that is, in the centrifugal air supply. The zone 21 forms a centrifugal gas stream into which at least a portion of the gas stream enters the axial flow supply zone 31, i.e., between the two axial flow vanes 30, and is mixed with the axial flow, and the at least a portion of the centrifugal flow At the same time, the plurality of axial flow vanes 30 are rotated and pushed, and then the air flow pushed by the rotation is accelerated toward the central axis X direction. The rear side (exhaust side) of the composite impeller 1 in the parallel direction is sent out; and the other part of the air passes through the plurality of axial flow vanes 30 and is rotated out along with the plurality of axial flow vanes 30 to form an axial flow, that is, Forming an axial flow in the axial flow supply zone 31, at least a portion of the axial flow being mixed with at least a portion of the centrifugal flow passing through the outlet 12 of the casing 10, together with the plurality of axial blades 30 The composite impeller 1 is sent to the rear side (exhaust side) in a direction parallel to the central axis X direction.

As shown in FIG. 6 and FIG. 7, the air blowing device 2 of the present invention comprises: a cylindrical outer casing 70, wherein the composite impeller 1 is disposed, wherein the two ends of the cylindrical outer casing 70 are respectively an air inlet. 71 and the air outlet 72, and the composite impeller 1 is rotated to drive air from the air inlet 71, and then through the centrifugal blade 20 and the axial flow blade 30 of the composite impeller 1, and then sent out by the air outlet 72 (as indicated by the arrow in Figure 8). Further, a bracket 73 may be disposed in the cylindrical outer casing 70 for supporting the drive unit 40.

Therefore, the composite impeller and the air blowing device of the present invention can increase the pressure of the air to be sent by combining the blades of the centrifugal and axial flow, and further increase the air flow rate due to the suction side having a wider area. .

Further, each of the axial flow vanes 30 is provided on the outer peripheral side of the outlet 12 of the casing 10, whereby the distance of the air sent from the centrifugal vane 20 to the axial flow vanes 30 becomes short, and therefore, the pressure loss of the air can be reduced. , can improve efficiency.

Further, the inlet 11 of the casing 10 is disposed on the side of the central axis X of the one side plate 13, and a portion of the side plate 13 other than the inlet 11 covers an outer side of the centrifugal blade 20, whereby It is possible to prevent the air sent out from the outer peripheral side of the centrifugal blade 20 from leaking from the inlet 11 side of the casing 10, and therefore, the efficiency can be improved.

The above are only the preferred embodiments of the present invention, and are intended to be illustrative, and not restrictive, and those of ordinary skill in the art will understand that within the spirit and scope defined by the appended claims Many changes, modifications, and even equivalents may be made without departing from the scope of the invention.

Claims

Rights request

1. A compound impeller, characterized in that it includes:

A casing having an inlet in the axial direction of the rotation center and a plurality of outlets in the radial direction of the rotation center axis;

A plurality of centrifugal blades are evenly arranged around the central axis of rotation and fixed on the inner surface of the casing, and rotate to generate centrifugal airflow that enters from the inlet of the casing and is discharged from the plurality of outlets. The range of the rotational strokes of the plurality of centrifugal blades is defined to form a centrifugal air supply area;

A plurality of axial flow blades are evenly arranged around the casing in a radial direction with the rotation center axis as the center and radially, and rotate to generate an axial flow airflow along the axial direction of the rotation center. The plurality of axes The range of the rotational motion of the flow blade is defined to form an axial flow air supply area; and

A driving unit drives the casing to rotate with the rotation central axis as the center, so as to cause the plurality of centrifugal blades and the plurality of axial flow blades to rotate synchronously;

Wherein, the aforementioned radial direction is perpendicular to the central axis of rotation;

Wherein, the outlet of the casing is connected to the centrifugal air supply area and the axial flow air supply area; wherein, when the driving unit drives the plurality of centrifugal blades and the plurality of axial flow blades to rotate synchronously, the centrifugal air supply area is The airflow is discharged from the centrifugal air supply area through the outlet of the casing, so that at least a part of the centrifugal airflow enters the axial air supply area and mixes with the axial airflow, and at least a part of the centrifugal airflow is simultaneously affected by the The plurality of axial flow blades rotate and push to accelerate the flow in the axial direction of the rotation center.

2. The compound impeller according to claim 1, wherein the casing has a pair of side plates covering both sides of the plurality of centrifugal blades, and one side plate of the pair of side plates is provided with the The inlet is provided with the plurality of outlets between the pair of side plates and located on the outer peripheral side of the multi-centrifugal blade.

3. The compound impeller according to claim 1, characterized in that the outlet of the casing is connected to the centrifugal air supply area and the axial air supply area.

4. The compound impeller according to claim 1, wherein the width of each axial flow blade end is greater than or equal to the width of the outlet of the casing in the axial direction of the rotation central axis.

5. The compound impeller according to claim 1, wherein the diameter of the inner peripheral edge of the inlet of the casing is larger than the diameter of the inner end of the centrifugal blade.

6. The compound impeller according to claim 1, wherein each axial flow blade includes a blade part and a fixed part, and is fixed on the radial periphery of the casing using a fixed base, the fixed base includes A first base body and a second base body, and the first base body and the second base body are correspondingly locked with each other, the first base body A corresponding groove is provided inside the base body and the second base body respectively, for sandwiching the fixing portion of each axial flow blade.

7. The compound impeller according to claim 6, wherein the cross-sectional shape of the fixed portion of each axial flow blade is circular or polygonal.

8. The composite impeller according to claim 6, further utilizing at least one locking member to pass through the casing, the first base body and the second base body respectively and set corresponding to the locking member. locking holes.

9. An air supply device, which is provided with a composite impeller as claimed in any one of claims 1 to 8 in a cylindrical outer box, characterized in that the two ends of the cylindrical outer box are respectively The air inlet and the air outlet are rotated by the compound impeller to drive the air to enter from the air inlet and then be sent out from the air outlet.

10. The air supply device according to claim 9, characterized in that a bracket supporting the driving unit is further provided inside the cylindrical outer box.