CN112065749B

CN112065749B - Impeller

Info

Publication number: CN112065749B
Application number: CN202010963358.XA
Authority: CN
Inventors: 邴德城
Original assignee: Dezhou Bingtian Electromechanical Technology Co ltd
Current assignee: Dezhou Bingtian Electromechanical Technology Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-09-24
Anticipated expiration: 2040-09-14
Also published as: CN112065749A; WO2022052450A1

Abstract

The invention discloses an impeller which comprises a front disc, a rear disc and guide vanes distributed between the front disc and the rear disc in an array manner, wherein the guide vanes are trapezoidal straight plate bodies, one end of the upper bottom edge of each guide vane is connected with the end surface of the front disc, and one end of the lower bottom edge of each guide vane is connected with the rear disc. The invention has the beneficial effects that: the impeller of the invention has multiple types of conveying fluid and wide application environment range, not only has the advantage of large fluid circulation, but also has the advantages of high efficiency, large pressure and small volume; the composite material can be manufactured by adopting a one-step forming process, does not need assembly and welding, has a simplified process, can be produced in batches and has low manufacturing cost.

Description

Impeller

Technical Field

The invention relates to the technical field of power machinery, in particular to an impeller, and specifically relates to a direct-current conical centrifugal impeller capable of conveying gaseous and liquid fluids and discharging the fluids forwards and backwards and a fluid conveying device comprising the impeller.

Background

The fan is a power machine which converts the rotary mechanical energy into the kinetic energy and the potential energy of gas and conveys the gas out, and the fan is a driven fluid machine. The fan is a short-term habit for gas compression and gas conveying machinery in China, and is widely used for ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, and ventilation and air induction of boilers and industrial furnaces and kilns; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grain, wind tunnel wind source and air cushion boat inflating and propelling.

The fan impeller is equivalent to the heart of the fan, and the impeller types of different fans are different. The fan can be divided into according to the flow direction of the air flow after entering the impeller or the form of the impeller: axial fans, centrifugal fans, and mixed flow fans; wherein the content of the first and second substances,

1. the axial flow fan impeller is characterized in that: the air inlet direction and the air outlet direction are the same, and the impeller of the impeller is mostly a forward-swept flow deflector or a steel flow deflector optimally designed by using a CAD flow simulation technology or an imported small cyclone impeller;

2. the centrifugal fan impeller is characterized in that: the air inlet direction and the air outlet direction form 90 degrees, and the impellers are forward-bent impellers, backward-bent impellers and backward-bent impellers;

3. the mixed flow fan impeller is characterized in that: the movement of the airflow in the fan integrates the characteristics of an axial flow fan and a centrifugal fan, and the angle between the air inlet direction and the air outlet direction of the airflow is not 90 degrees nor 180 degrees.

Furthermore, both axial fans and centrifugal fans differ in that: 1. the principle of generating wind pressure is different, an axial flow fan drives gas to move along the axial direction by the rotation of a flow deflector, and a centrifugal fan conveys the gas by the centrifugal force generated by the rotation of an impeller; 2. axial flow fans are generally large in size, while centrifugal fans are small in size due to the fact that impellers of the centrifugal fans are installed in a closed mode; 3. the axial-flow type ventilator has very low wind pressure but large wind quantity, while the centrifugal fan can generate higher wind pressure (up to 0.2 MPa) and small wind quantity.

The above three traditional forms of fans are difficult to meet the ventilation requirements of certain specific locations, namely: under the same power, the invention needs the fan with large air volume, large air pressure and high efficiency, and the volume of the fan is reduced by more than 20 percent, so the invention provides the impeller with large air volume and small volume under the same power.

Disclosure of Invention

In order to solve the problem that a fan in the prior art cannot meet certain application requirements, the invention provides an impeller which is large in air volume and air pressure and small in size under the same power and a fluid conveying device comprising the impeller.

In order to achieve the purpose, the invention provides an impeller which comprises a front disc, a rear disc and guide vanes distributed between the front disc and the rear disc in an array manner, wherein the guide vanes are trapezoidal straight plate bodies, one end of the upper bottom edge of each guide vane is connected with the end face of the front disc, and one end of the lower bottom edge of each guide vane is connected with the rear disc.

The end face of the upper bottom edge of the flow guide plate is completely positioned on the annular end face of the front disc; the outer side surface of the rear disc is connected with the inner side wall of the flow deflector, which is close to the lower bottom edge; the front disc and the rear disc are both annular plates, the central hole of the front disc is a fluid input port (if fluid is gas, the impeller is used as a fan impeller, the input port is an air inlet), and the end part of the lower bottom edge of the flow deflector is a fluid output port (if fluid is gas, the impeller is used as a fan impeller, the output port is an air outlet).

The flow deflector is preferably a right-angle trapezoidal straight plate body, and the end surface of the right-angle waist edge of the flow deflector is parallel to the axis of the impeller; an included angle alpha formed by a tangent line formed by the contact point of the flow deflector and the front disc on the front disc and the flow deflector is 1-89 degrees, and preferably 30-35 degrees; the flow deflector is a right-angle trapezoidal straight plate body, and the bottom angle beta of the flow deflector is 30-80 degrees, preferably 25-30 degrees.

The length ratio of the upper bottom edge to the lower bottom edge of the flow deflector is as follows: 1:1 to 1:1.2, preferably 1: 1.1; the ratio of the diameter of the center hole of the front disc to the length of the right-angled waist of the flow deflector is as follows: 1:1 to 1.5:1, preferably 1:1 when the diameter of the central hole of the front disc is larger than 100cm, and preferably 1.5:1 when the diameter of the central hole of the front disc is smaller than 100cm when the diameter of the central hole of the front disc is larger than 100 cm).

Preferably, the impeller may further include a casing for covering the guide vane, and the impeller is integrally externally tapered.

Particularly, the impeller of the invention is integrally formed and can be integrally formed through one-time turning and milling or one-time injection molding.

The number of the guide vanes is 2-1200, preferably, the guide vanes can be determined according to the maximum diameter of the impeller, and the ratio of the maximum diameter of the impeller to the number of the blades is 5: 1.

The diameter of the central through hole (namely the input port) of the front disc and the length of the lower bottom edge of the flow deflector (namely the output port position) are determined according to actual requirements by combining parameters such as the shaft diameter of the motor, air volume and air pressure.

In practical use, the driving mechanism is in transmission connection with the rear disk or the front disk of the impeller, and preferably, the driving mechanism is connected with the rear disk of the impeller.

In order to better achieve the above object, the present invention further provides a fluid delivery device, which comprises the impeller of the foregoing structure; the fluid conveying device can be used for conveying gas, liquid, powdery or granular solids and the like.

The invention has the beneficial effects that:

1. the impeller of the invention has multiple types of conveying fluids and wide application environment range, can convey various fluids such as gas, liquid, solid and the like, and can be directly arranged on places such as pipelines, walls and the like after being connected with the driving mechanism;

2. the impeller of the invention not only has the advantage of large fluid circulation, but also has the advantages of high efficiency, large pressure and small volume; when the impeller is used as a fan impeller for conveying gas, the fan volume can be reduced by 40% under the same power, the efficiency can be improved by 2-5 times under the same volume, and the impeller has the advantages of an axial flow fan and a centrifugal fan;

3. the special structural design and the fluid inlet and outlet direction of the impeller determine that the impeller can be manufactured by adopting a one-step forming process, such as one-step turning and milling or one-step injection molding.

In addition, the fluid inlet and outlet directions of the impeller of the present invention are completely different from the fluid guide of the existing impeller, taking a fan impeller as an example, the conventional impeller is the air inlet and outlet directions of either coaxial 180 ° (such as an impeller of an axial flow fan), 90 ° (such as an impeller of a centrifugal fan), or obliquely inlet and oblique outlet (such as an impeller of an oblique flow fan), while the fluid guide of the impeller of the present invention is coaxial inlet, offset axis and parallel axis outlet, the fluid guide is different from the fluid guide of the conventional impeller, and is also a special fluid guide brought by a special structure, and the impeller of the present invention has the advantages of 1 to 3.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is another angle structure diagram of embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 4 is another angle structure diagram of embodiment 2 of the present invention.

Fig. 5 is a schematic view of the angle of the guide vane in

embodiments

1 and 2 of the present invention.

Fig. 6 is a schematic structural view of a guide vane in

embodiments

1 and 2 of the present invention.

Fig. 7 is a schematic view of the flow guiding direction of the impeller in

embodiments

1 and 2 of the present invention (for convenience of illustration, part of the flow guiding plate is omitted).

Wherein the reference numerals are: 1. a front plate; 2. a rear disc; 3. a flow deflector; 4. a housing.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

Example 1 (impeller without casing)

Referring to fig. 1, fig. 2, fig. 5, fig. 6, and fig. 7, the present embodiment provides an impeller, which includes a front disk, a rear disk, and flow deflectors arranged between the front disk and the rear disk in an array manner, where the flow deflectors are trapezoidal straight plates, and one end of an upper bottom edge of each flow deflector is connected to an end surface of the front disk, and one end of a lower bottom edge of each flow deflector is connected to the rear disk.

The end surface of the upper bottom edge of the guide vane is completely positioned on the annular end surface of the front disc; the outer side surface of the rear disc is connected with the inner side wall of the flow deflector, which is close to the lower bottom edge; the front disc and the rear disc are both annular plates, the central hole of the front disc is a fluid input port (see fig. 7, if the fluid is gas, the impeller is used as a fan impeller, the input port is an air inlet), and the end part of the lower bottom edge of the flow deflector is a fluid output port (see fig. 7, if the fluid is gas, the impeller is used as a fan impeller, the output port is an air outlet).

The flow deflector is preferably a right-angle trapezoidal straight plate body, and the end surface of the right-angle waist edge of the flow deflector is parallel to the axis of the impeller; the tangent line formed by the contact point of the flow deflector and the front disc on the front disc and the included angle alpha formed by the tangent line and the flow deflector are 35 degrees; the flow deflector is a right trapezoid straight plate body, and the bottom angle beta of the flow deflector is 30 degrees.

The length ratio of the upper bottom edge to the lower bottom edge of the flow deflector is 1: 1.1; the ratio of the diameter of the center hole of the front disc to the length of the right-angled waist of the flow deflector is as follows: 1:1 or 1.5:1, preferably 1:1 when the diameter of the central hole of the front disc is larger than 100cm, and preferably 1.5:1 when the diameter of the central hole of the front disc is smaller than 100cm when the diameter of the central hole of the front disc is larger than 100 cm.

When in use, the driving mechanism is in transmission connection with the impeller rear disc.

Example 2 (impeller with casing)

Referring to fig. 3, 4, 5, and 6, the present embodiment provides an impeller, which includes a front disk, a rear disk, and flow deflectors arranged between the front disk and the rear disk in an array manner, where the flow deflectors are trapezoidal straight plates, and one end of the upper bottom edge of each flow deflector is connected to an end surface of the front disk, and one end of the lower bottom edge of each flow deflector is connected to the rear disk.

The end surface of the upper bottom edge of the guide vane is completely positioned on the annular end surface of the front disc; the outer side surface of the rear disc is connected with the inner side wall of the flow deflector, which is close to the lower bottom edge; the front disc and the rear disc are both annular plates, the central hole of the front disc is a fluid input port (if the fluid is gas, the impeller is used as a fan impeller, the input port is an air inlet), and the end part of the lower bottom edge of the flow deflector is a fluid output port (if the fluid is gas, the impeller is used as a fan impeller, the output port is an air outlet).

The flow deflector is preferably a right-angle trapezoidal straight plate body, and the end surface of the right-angle waist edge of the flow deflector is parallel to the axis of the impeller; the tangent line formed by the contact point of the flow deflector and the front disc on the front disc and the included angle alpha formed by the tangent line and the flow deflector are 30 degrees; the flow deflector is a right trapezoid straight plate body, and the bottom angle beta of the flow deflector is 25 degrees.

The length ratio of the upper bottom edge to the lower bottom edge of the flow deflector is as follows: 1: 1.2; the ratio of the diameter of the center hole of the front disc to the length of the right-angled waist of the flow deflector is as follows: 1:1-1.5:1, preferably 1:1 when the diameter of the central hole of the front disc is more than 100cm, and preferably 1.5:1 when the diameter of the central hole of the front disc is less than 100cm when the diameter of the central hole of the front disc is more than 100 cm.

Preferably, the impeller may further comprise a casing for covering the guide vane, and the impeller is integrally externally tapered.

Example 3

On the basis of the

embodiment

1 or 2, the number of the flow deflectors is further limited; the number of the guide vanes is 2-1200, preferably, the number of the guide vanes is determined according to the maximum diameter of the impeller, and the ratio of the maximum diameter of the impeller to the number of the blades is 5: 1.

Example 4

This embodiment is a fluid delivery device comprising the impeller of any of embodiments 1-3; the fluid transport device of (3) can be used for transporting gas, liquid, or powdery or granular solid.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An impeller is characterized by comprising a front disc, a rear disc and guide vanes distributed between the front disc and the rear disc in an array manner, wherein the guide vanes are trapezoidal straight plate bodies, one end of the upper bottom edge of each guide vane is connected with the end surface of the front disc, and one end of the lower bottom edge of each guide vane is connected with the rear disc;

the end face of the upper bottom edge of the flow guide plate is completely positioned on the annular end face of the front disc; the outer side surface of the rear disc is connected with the inner side wall of the flow deflector, which is close to the lower bottom edge;

the flow deflector is a right-angle trapezoidal straight plate body, and the end surface of the right-angle waist edge of the flow deflector is parallel to the axis of the impeller;

the front disc and the rear disc are both annular plates, a central hole of the front disc is a fluid input port, and the end part of the lower bottom edge of the flow deflector is a fluid output port; the fluid direction of the impeller is coaxial entry, offset axis and parallel axis output.

2. The impeller as claimed in claim 1, wherein a tangent line formed by the contact point of the guide vane with the front disk at the front disk forms an angle α of 1-89 ° with the guide vane.

3. The impeller of claim 1, wherein the bottom angle β of the guide vane is 30-80 °.

4. The impeller as claimed in claim 1, wherein the length ratio of the upper bottom edge to the lower bottom edge of the guide vane is: 1: 1.1; the ratio of the diameter of the center hole of the front disc to the length of the right-angled waist of the flow deflector is as follows: 1:1-1.5:1.

5. The impeller according to any of claims 1-4, further comprising a casing for encasing said flow deflector.

6. The impeller according to any of claims 1 to 4, characterized in that said impeller is integrally formed.

7. A fluid delivery device comprising an impeller according to any one of claims 1 to 6.