WO2007019796A1

WO2007019796A1 - A pressurized axial blower

Info

Publication number: WO2007019796A1
Application number: PCT/CN2006/002068
Authority: WO
Inventors: Junhao Lin
Original assignee: Junhao Lin
Priority date: 2005-08-19
Filing date: 2006-08-15
Publication date: 2007-02-22
Also published as: CN2839671Y

Abstract

A pressurized axial blower comprises an impeller, a blade and a motor, characterized in that the blade is provided with a pressurized deflector (116) which is provided on the pressure side of the blade and the bottom of which is attached to the sidewall of the pressure side of the blade. The pressurized axial blower according to the present invention may not be provided with a casing to be solely used and made into various fan blowers and ventilating fans, or may be provided with a casing to be made into various axial blowers, it has advantages of high pressure, high efficiency, energy conservation and low noise.

Description

Pressurized axial flow fan

The invention relates to the field of air purification technology, in particular to a supercharged axial flow fan. BACKGROUND OF THE INVENTION Axial fans currently used have low wind pressure, poor ability to handle pollutants, high noise, high energy consumption, low efficiency, and narrow use range. Summary of the invention

The object of the present invention is to provide a supercharged axial flow fan which has high wind pressure, strong ability to handle pollutants, low energy consumption, high efficiency, low noise and wide application range.

The invention is realized by the following technical solutions: a supercharged axial flow fan, which comprises an impeller, an impeller blade and a motor, characterized in that a booster baffle is arranged on the impeller blade, and the booster baffle is arranged at One side of the working surface of the impeller blade is connected to the side wall of the working surface of the impeller blade.

The impeller of the supercharged axial flow fan is the same as the existing axial flow fan impeller. It is also composed of the impeller blades and the hub (core or root block). It is also that the leading edge of the impeller blades absorbs the intake air in the direction of rotation. The air flow is exhausted axially from the trailing edge of the impeller blades

For the convenience of description and clear expression, there are several noun terms explained here:

The axial windward side of the impeller (the axial inlet face of the impeller) is defined as the axially outer side of the impeller (or the front axial side), and the side of the impeller blade corresponding thereto is defined as the outer side of the impeller blade. Impeller The axial exhaust surface is defined as the axial inner side of the impeller (or the axial rear side of the impeller), and this side of the impeller vane is defined as the working surface of the impeller vane.

The impeller blade is radially close to the core tube or the shaft plate, and the root block portion is the root of the impeller blade, referred to as the blade root, and the radial end of the impeller blade is the top of the impeller blade, referred to as the tip of the blade. The impeller blade is near the blade root and is called the lower or bottom of the impeller blade. The impeller blade is near the top of the blade and is called the upper part of the impeller blade. The axial air inlet edge of the impeller blade is the leading edge of the impeller blade, and the axial exhausting edge is called the trailing edge of the impeller blade.

The outer edge of the impeller is the radial edge of the impeller, and the axial side edge of the impeller is the axial edge of the impeller. The axial edge of the impeller is divided into the axial edge of the impeller and the axial edge of the impeller.

Like the existing axial flow fan, the impeller of the present invention may be single-stage or multi-stage, and the impeller blade may be a circular arc shape, which may be a straight plate shape, may be a curved plate shape, or may be a machine. Different structural forms such as wing shape. The impeller blades can be connected with the axial flow core-shaped hub to form a uniform impeller, or can be connected with the centrifugal shaft plate and the blade root plate to form a uniform impeller. The purpose of providing the booster baffle on the impeller blade is to allow the airflow entering the inner side of the impeller to flow along the impeller blade working face along the track determined by the booster baffle, thus increasing the effective contact area of the airflow to the impeller blade. Therefore, the airflow can be more piled up to absorb the energy transmitted by the impeller blades, so that a higher wind pressure can be obtained. For this purpose, it is required that the pressurized baffle must traverse the working surface of the impeller blade from the leading edge (or near the leading edge) of the impeller blade to its trailing edge (or near the trailing edge). This traverse can be straight, can be oblique, can be linear or curved, but in either traverse mode, the bottom of the pressurized baffle and the impeller blade face side The walls (including the sidewall edges of the impeller blade face) are connected. According to requirements, one impeller vane working surface can be provided with one boosting baffle, or more than two supercharged baffles.

The pressurized deflector can also be disposed at the top edge of the impeller blade, and the pressurized baffle disposed on the top edge of the impeller blade can also block the radial flow of the impeller blade from the impeller blade, so that The boosting effect can also achieve the effect of reducing noise. The pressurized baffle can be in a variety of different configurations, such as a straight plate, a curved plate, an airfoil, and the like. The length of the booster baffle may be greater or less than the impeller blade width (from the leading edge of the impeller blade to its trailing edge) or may be equal to the impeller blade width.

In order to ensure that the impeller has sufficient rigidity and sufficient strength, the technical solution can also provide a reinforcing lacing on the edge of the impeller. The impeller edge referred to herein includes the impeller radial edge and the impeller axial edge. The reinforcing ribs provided at the radial edges of the impeller are connected to the tops of the respective impeller blades, and the respective impeller blades are integrally connected from the outer circumference of the impeller by means of such radial reinforcing lacings, such radial reinforcing lacings may be It can be a few.

The impeller axial edge reinforcement rib is disposed on an axial side or both axial sides of the impeller. Such axial edge reinforcement lacings are joined to the leading or trailing edge of the impeller blades or the impeller blade side wall surfaces. The impeller blades are joined together from the leading or trailing edge of each blade or its side by means of such axially reinforced lacing. The axial reinforcement of the impeller can be arranged on both axial sides of the impeller or on only one axial side. A reinforcing lacing can be provided on one axial side or several reinforcing lacings can be provided. The radially reinforcing lacing or the axial reinforcing lacing may be in the form of a whole circular ring structure, or may be a plurality of curved or linear structural forms connecting the two impeller blades respectively, so that the entire impeller blades are integrally connected.

The impeller of the present technical solution can also be provided with a blade root seat plate. The root seat disk is smaller than the general centrifugal impeller leaf disc, and it is only located in the middle of the axial side of the impeller. Its function is to connect the fixed impeller blades from the root of the impeller blades. The blade root seat discs may be provided separately or simultaneously on both axial sides of the impeller as needed. The root seat plate provided on the axial side of the impeller may be provided with a negative pressure hole on the front axial side thereof, and the negative pressure hole communicates with the air flow passage on the inner side of the impeller. During operation, the negative pressure orifice can directly draw the gas into the inner side of the impeller for processing, and then discharge the impeller axially along the outlet edge of the impeller blade. The root pocket of the negative pressure orifice can increase the flow rate of the impeller. Increase the wind pressure, the radial size of the impeller can be reduced

Correction page (Article 91) small.

The supercharged axial flow fan impeller of the invention can be used alone without a casing, and can be made into various exhaust fans and ventilation fans, or can be made into various axial flow fans by adding a casing. The impeller can be used in a single stage, or a plurality of impellers can be used in series to form a multi-stage axial flow fan. However, whether it is used alone or as a single-stage or multi-stage axial fan, it can achieve significant wind pressure, high efficiency, energy saving and low noise.

The invention will be explained in detail below with reference to the accompanying drawings and embodiments. DRAWINGS

Figure 1 is a schematic view showing the structure of the present invention;

Figure 2 is a view of the direction A of Figure 1:

Figure 3 is a schematic view showing the second structure of the present invention;

Figure 4 is a B-direction view of Figure 3;

Figure 5 is a schematic view of the third structure of the present invention:

Figure 6 is a fourth structural schematic view of the present invention:

Figure 7 is a schematic view showing the fifth structure of the present invention.

Where the figure number -

1 impeller 2 impeller blade 3 motor 4 booster baffle

5 Reinforced lacing 6 Root seat plate 7 Negative pressure hole 8 Impeller blade leading edge

9 impeller blade trailing edge 10 impeller blade blade root 11 impeller blade tip 12 casing. detailed description

Example 1

Referring to Figures 1 and 2, a supercharged axial flow fan includes an impeller 1, an impeller blade 2, and an electric motor 3. The impeller 1 is composed of six arc-shaped impeller blades 2 and a core-cylinder hub, and the impeller blade blade root 10 is welded to the outer side of the core tube, and two impeller-shaped pressure-adjusting baffles 4 are arranged on each impeller blade working surface, and the guiding direction of each of the pressure-adjusting baffles is from the impeller blade leading edge 8 Pointing to the trailing edge 9 of the impeller blade and traversing the impeller blade, the bottom of each of the pressure-adjusting baffles 4 is connected to the side wall of the impeller blade working surface, and one of the pressurized baffles 4 is disposed at the middle of the working surface of the impeller blade, A pressurized baffle 4 is provided on the end wall of the impeller blade tip 11 (the end of the impeller blade face).

During operation, the gas enters the impeller from the axial side of the front of the impeller, and enters the impeller blade working face from the inlet of the impeller blade leading edge 8 and flows along the curved working track defined by the pressurized baffle 4 through the impeller working face, and then the trailing edge of the impeller blade 9 The outlet axially exits the impeller blades to form an axial flow of gas that exits the impeller. Due to the action of the pressure-adjusting baffle 4, the airflow entering the working surface of the impeller blade cannot be directly discharged from the impeller blade, and due to the limitation of the circular-shaped boosting baffle 4, the impeller blade and the supercharging guide can be more absorbed. The Taiwanese that passed the film.

As a result, higher wind pressures and wind speeds can be obtained, as well as corrections on the edge of the tip of the impeller blades (Rule 91) The blockage of the pressure-adjusting baffle, the airflow entering the working surface of the impeller blade can not radially overflow the impeller blade, so that the airflow entering the working surface of the impeller blade can more fully absorb energy, thereby ensuring a higher impeller. Supercharging efficiency.

This embodiment is suitable for use as a variety of exhaust fans and ventilation fans. Since the pressure-adjusting baffle 4 is provided at the edge of the impeller blade top working face, the airflow flowing through the inside of the impeller does not radially overflow the impeller due to the centrifugal force. Therefore, although the cylindrical casing is not provided, the impeller is processed. The air flow will also be axially discharged from the impeller to form an axial flow of air. Therefore, although this case does not have a casing, it can be used as an axial fan with a casing.

Example 2

Referring to Figures 3 and 4, this example is substantially the same as Example 1, except that the impeller hub of this example consists of a bushing and a blade seat plate 6. The root portion of the two axial sides of the impeller is provided with a blade seat plate 6, and the bottom half and the root of the six impeller blades are fixed on the blade root plate. The second difference is that the rear axial side of the example is provided with a circular ring. The reinforcing ribs 5, the annular reinforcing ribs 5 are connected to the trailing edge edges of the respective impeller blades, and the six impeller blades are integrally connected. The third difference is that the pressurized baffle 4 on the impeller blade of this example is provided only one, and the pressurized baffle is disposed on the working edge of the impeller blade.

The performance characteristics of this example are the same as those of the first example. The difference is that the working wheel is not easily deformed due to the effect of reinforcing the lacing, and the assembly and welding of the impeller blades are easier because of the centrifugal root seat plate. This example is suitable for use as a large-scale inorganic shell (with shroud) axial flow fan.

Example 3

Referring to Fig. 5, the present example and the example 2 are basically the same, except that the blade root seat plate 6 of the front axial side of the impeller of the present embodiment is provided with six negative pressure holes 7, six negative pressure holes 7 and an impeller. The inner air flow passage is connected. The second difference is that the outer edge of the impeller of this example is provided with a circular radial reinforcing rib 5, and the radial reinforcing rib 5 is connected with the tip edge of the impeller blade, and the impeller blades are integrated into one. .

During operation, because the impeller has a negative pressure hole on the axial side of the impeller, due to the centrifugal force, the negative pressure of the airflow inside the impeller will suck the outside air from the axial direction through the negative pressure hole, that is, work At this time, the negative pressure orifice will draw the outside air as the leading edge of the impeller blade, so the impeller flow is extraordinarily larger. A certain flow rate is determined. With the structure of this example, the impeller diameter can be much smaller.

The performance and use of this example are the same as in Example 1. Example 2.

Example 4

Referring to Fig. 6, the main structure of the present example is the same as that of the example 2, except that the front axial side of the impeller of the present example is not provided with a blade root seat disk 6, and a circular annular reinforcing rib 5 is arranged in the middle of the front axial side of the impeller. The circular reinforcing ribs are connected with the leading edge edges of the respective impeller blades, and the annular reinforcing ribs are further provided with six linear reinforcing ribs, and the respective linear reinforcing ribs are respectively connected to one outer side of the impeller blades and the other The inner side edge of the impeller blade, the six impeller blades are connected by means of six linear reinforcement lacings.

Correction page (Article 91) The performance characteristics and the use of this example and the example 3 are the same, except that the blade root seat disk is not provided in the middle of the front axial side of the impeller. During operation, the middle part of the impeller (the wheel part) is axially aspirated with the main working part of the impeller blade, so the flow rate of the fan will be extraordinarily larger. It goes without saying that this structure can also reduce the size of the impeller.

Example 5

Referring to Figure 7, the impeller structure of this example is the same as that of Example 4. The difference is that the outer periphery of the impeller and the outer periphery of the motor are provided with a cylindrical casing 12, and the motor 3 is fixed inside the cylindrical casing. The second difference is that the front axial side of the impeller of this example is provided with a blade root disk 6.

During operation, due to the blockage of the pressure-adjusting baffle at the end of the impeller blade tip 11 working surface, the airflow inside the impeller blade does not overflow the impeller against the inner side wall of the casing due to the centrifugal force, so the noise of the fan is much smaller.

This example is suitable for use in a variety of tubular axial flow fans.

Rights request

1. A supercharged axial flow fan comprising an impeller (1), an impeller blade (2), and a motor (3), wherein the impeller blade (2) is provided with a pressure-adjusting baffle (4) for supercharging The deflector (4) is disposed on one side of the working surface of the impeller blade, and the bottom edge thereof is connected to the side wall of the working surface of the impeller blade (2).

2. The supercharged axial flow fan according to claim 1, characterized in that the side edge of the impeller (1) is provided with a reinforcing lacing (5), and the reinforcing lacing (5) is connected to the impeller blade (2). together.

3. A supercharged axial flow fan according to claim 1 or 2, characterized in that the axial portion of the impeller (1) is provided with a root seat plate (6), a blade root plate (6) and an impeller. The roots of the blades (2) are joined together.

4. The supercharged axial flow fan according to claim 3, wherein the impeller base plate (6) is provided with a negative pressure hole (7), and the negative pressure hole (7) and the inner flow passage of the impeller Connected.

Claims

s

The invention provides a supercharged axial flow fan, which comprises an impeller, an impeller blade and a motor. The utility model is characterized in that a pressure guiding vane is arranged on the impeller blade, and the boosting baffle is arranged on the working surface side of the impeller blade. The bottom edge of the impeller blade is connected to the side wall of the working surface of the impeller blade. The supercharged axial fan of the present invention can be used separately without a casing, and can be made into various exhaust fans and ventilation fans, or can be made of various casings. The axial flow ventilator has the advantages of high wind pressure, high efficiency, energy saving and low noise.