A vector adjustment component for a volute-free fan

Abstract

The present invention discloses a vector adjustment component of a volute-free fan, characterized in that it includes a flow-leveling component and a rectifying and even-flowing air duct arranged on the periphery of the fan outlet, the flow-leveling component is mainly composed of a plurality of flow-leveling plates arranged along the fan outlet row, wherein a plurality of punching holes are opened on a symmetrically distributed flow-leveling plate, a rectifying and even-flowing space is arranged between the flow-leveling component and the fan outlet, the airflow entering the fan flows out from the air outlet through the impeller, and then flows out from the punching hole through the gradually changing rectifying space, forming the rectifying and even-flowing air duct. The present invention adjusts vectors such as wind speed and wind direction while leveling the flow through the setting of the flow-leveling component to meet the needs of different environments.

Description

Technical Field

[0001] The present invention relates to the technical field of clean equipment manufacturing, and in particular to a vector adjustment component of a volute-free fan, which is mainly used in equipment such as transfer windows, purification units, laminar flow hoods, and clean workbenches. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and transport gas. It is a driven fluid machine, and the impeller is the key component of the fan. It is composed of several blades. The function of the impeller is to directly transfer the mechanical energy of the prime mover to the gas to increase gas pressure and transport gas. In clean occasions such as pharmaceuticals and electronics, voluteless fans have been increasingly widely used in purification products. Their application means that the unit is more efficient and energy-saving, and increases the structural diversity of purification products. However, in actual applications, voluteless fans still have defects such as uneven air output, insufficient wind pressure and uneven pressure, which require technical personnel in this field to work hard to improve and overcome. Summary of the invention

[0003] The object of the present invention is to provide a vector adjustment component for a volute-free fan. By using the component, various indicators of the airflow at the air outlet can be adjusted to meet the needs of different use environments for changes in wind speed and wind direction vectors.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: it includes a flow equalizer component and a rectifying and even-flowing air duct arranged at the periphery of the fan outlet, the flow equalizer component is mainly composed of a plurality of flow equalizer plates arranged along the fan outlet row, and a plurality of stamping holes are opened on one of the symmetrically distributed flow equalizer plates, and a rectifying and even-flowing space is provided between the flow equalizer component and the fan outlet. The airflow entering the fan flows out from the air outlet through the impeller, and then flows out from the stamping hole through the gradually changing rectifying space to form the rectifying and even-flowing air duct.

[0005] In the above technical solution, the flow equalizer plate is an annular flow equalizer plate, the bottom of which is fixed on the fan bottom plate, the punching holes are symmetrically distributed on both sides of the flow equalizer plate, and the flow equalizer plate with the punching holes has an inclination angle.

[0006] In a further technical solution, the flow equalizer is composed of four straight plates at the front, rear, left and right sides and four curved plates connecting the four straight plates. The plates are fixedly connected by screws, and the stamping holes are located on the front and rear straight plates or the left and right straight plates.

[0007] Another technical solution is that the flow equalizer plate is composed of left and right semi-annular plates connected together, and a mounting hole is opened on the side plate where the punching hole is located. The punching hole is arranged on a flow equalizer orifice plate, and the flow equalizer orifice plate cooperates with the mounting hole and is movably connected to the mounting hole of the side plate.

[0008] In the above technical solution, the flow equalizer component is composed of two symmetrically arranged long plates with parabolic curvatures and a short plate connecting the ends of the two long plates. The stamping holes are distributed on the short plates, and a gradual rectifying and equalizing flow duct is formed between the flow equalizer component and the air outlet of the fan.

[0009] A further technical solution is that the short plates are arranged in a mirror-symmetrical or center-symmetrical manner.

[0010] Furthermore, the short plate is arranged inclined, and the angle between the inclined surface and the fan bottom plate is 30° to 60°.

[0011] In the above technical solution, the distribution rate of the punching holes is 20%-40%.

[0012] In the above technical solution, the punching holes are oval holes within 4×28 mm and are arranged in an array on the flow equalizer plate.

[0013] In the above technical solution, the fan is a backward-inclined centrifugal fan without a volute, with an air inlet on the top and impeller-type air outlets around. The fan is located in the middle of the fan base plate, and fixing holes are provided around the fan base plate for installation and fixation with the main equipment.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] 1. The vector adjustment component of the present invention includes a flow equalizer plate, a rectifying and equalizing air duct and a punching hole on the flow equalizer plate. The flow equalizer plate is arranged along the air outlet ring of the fan to form a rectifying and equalizing air duct, which has the effect of rectifying and equalizing the airflow. The air volume in the air duct gathers to form a local positive pressure. At this time, the punching hole on the flow equalizer plate is connected to the outside, and the outside is relatively under negative pressure. The rectified and equalized airflow diffuses to the outside after passing through the punching hole. The distribution of the punching holes is used to complete the vector adjustment of wind speed and wind direction;

[0016] 2. Due to the setting of the flow plate and punching hole, the air outlet of the fan can be buffered and flowed uniformly, and at the same time, the airflow noise and the discomfort caused by excessive wind speed can be reduced to meet the needs of different environments;

[0017] 3. In the present invention, the shape (radian) and length of the uniform flow plate can be varied to form different rectifying and uniform flow air ducts, realize various adjustments to the air flow vector, and meet various needs of users;

[0018] 4. In the present invention, the size of components such as the flow plate can be adjusted according to the size of the fan, which can adapt to various specifications and models of existing volute-free fans. It is easy to install without adjusting the existing fan structure. The unit-type supporting installation adds further adjustment functions to the existing fan to meet people's increasingly improved environmental requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram from top view;

[0021] Figure 3 yes Figure 1 Schematic diagram of the left side;

[0022] Figure 4 This is a wind direction flow diagram of the first embodiment of the present invention when in use;

[0023] Figure 5 1 is a comparison diagram of airflow patterns between the first embodiment of the present invention and the prior art;

[0024] Figure 6 This is a diagram of the installation and use status of the first embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0026] Figure 8 yes Figure 7 A cross-sectional schematic diagram of

[0027] Fig. 9 is a wind direction schematic diagram of Embodiment 3 of the present invention;

[0028] Fig.10 is a schematic structural diagram of a fourth embodiment of the present invention;

[0029] Fig.11 This is a usage status diagram of the fourth embodiment of the present invention.

[0030] Among them: 1. Flow uniformity plate; 2. Static pressure rectifier and uniform flow air duct; 3. Stamping hole; 4. Air outlet; 5. Fan; 6. Impeller; 7. Flow uniformity orifice plate; 8. Fan bottom plate; 9. Long board; 10. Short board; 11. Gradual rectifier and uniform flow air duct; 12. Triangular support plate. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0032] Example 1: See Figures 1 to 6As shown, a vector adjustment component of a volute-free fan includes a flow-uniform component arranged at the periphery of the fan outlet 4, the flow-uniform component includes a flow-uniform plate 1 and a rectifying and uniforming air duct 2 arranged along the outlet 4, a plurality of stamping holes 3 are opened on the symmetrically distributed flow-uniform plate 1, a rectifying and uniforming space is provided between the flow-uniform component and the air outlet of the fan 5, the airflow entering the fan 5 flows out from the air outlet through the impeller 6, and then flows out from the stamping holes through the rectifying and uniforming space, forming the static pressure rectifying and uniforming air duct 2.

[0033] like Figure 1 As shown, the flow plate 1 is an annular flow plate, the bottom of which is fixed on the fan base plate 8, and the punching holes 3 are symmetrically distributed on both sides of the flow plate 1. The fan base plate 8 is provided with fixing holes around it for installation and fixing with the main equipment (i.e. the installation position of the fan).

[0034] like Figure 2 , 3 As shown in Figures 6 and 7, the flow equalizer plate 1 is formed by connecting the left and right semi-circular plates. The side plate where the punching hole 3 is located is provided with a mounting hole. The punching hole is arranged on a flow equalizer plate 7. The flow equalizer plate 7 cooperates with the mounting hole and is movably connected to the mounting hole of the side plate. The so-called movable connection means that the flow equalizer plate 7 where the punching hole 3 is located is a component that can be replaced and disassembled at any time. According to the change of demand, the flow equalizer plate 7 with the appropriate number, size and distribution of punching holes can be selected, which is flexible and convenient to install.

[0035] The distribution rate of the punching holes 3 on the flow plate 1 is 20%-40%. The punching holes 3 are oval holes within 4×28mm and are arranged in an array on the flow plate 1. Experiments have found that:

[0036] (1) When the punching rate of the flow plate is about 20%, the wind speed uniformity can be improved from ±35% to within ±15%, but the average wind speed of the air supply is reduced by about 20%;

[0037] (2) When the punching rate of the flow plate is about 30%, the wind speed uniformity can be improved from ±35% to within ±15%, but the average wind speed of the air supply is reduced by about 15%;

[0038] ⑶ When the punching rate of the flow plate is about 40% or above, the wind speed uniformity can be improved from ±35% to about ±30%, and the effect is not good. A punching rate of more than 40% is not recommended.

[0039] According to the comprehensive effect, the best punching rate of the uniform flow orifice plate 7 is about 30%.

[0040] In this embodiment, if Figure 6As shown, the fan 5 is a backward-inclined centrifugal fan without a volute, with an air inlet at the top and air outlets 4 with impellers 6 around it. The fan 5 is installed in the middle of the fan bottom plate 8, and the flow equalizer plates 1 are arranged in an annular manner and at intervals on the periphery of the fan 5. A static pressure rectifying and equalizing air duct 2 for air flow is formed between the flow equalizer plates 1 and the fan 5. Figure 6 As shown, the air flow is sucked into the fan 5 from the air inlet, split outward through the impeller 6, enters the static pressure rectifying and uniform flow air duct 2, and then flows out from the punching hole 3 to achieve flow uniformity and wind speed regulation.

[0041] Embodiment 2, a vector adjustment component of a volute-free fan. In this embodiment, its structure is basically similar to that of embodiment 1, except that the flow equalizer is composed of four straight plates at the front, rear, left, and right and four sections of curved plates connecting the four straight plates. The plates are fixedly connected by screws, and the punching holes are located on the front and rear straight plates or the left and right straight plates. Each section of the flow equalizer is a sheet metal part. According to the size of the fan and the installation position, the flow equalizer of the appropriate size is selected for splicing and assembly, which has better adaptability. Since the straight plate and the curved plate are installed separately, it is more flexible during assembly. If the wind direction and air volume need to be changed, the straight plate with the punching holes can be replaced to meet different needs.

[0042] Example 3: See Figures 7 to 9 As shown, a vector adjustment component of a volute-free fan includes a flow-uniform component arranged at the periphery of a fan outlet 4, wherein the flow-uniform component includes a flow-uniform plate 1 arranged along the outlet 4 and a rectifying and uniform-flow air duct. In this embodiment, it is better than the first embodiment in that: the flow-uniform component is composed of two symmetrically arranged long plates 9 with parabolic curvatures and a short plate 10 connecting the ends of the two long plates 9, and punching holes 3 are distributed on the short plate 10, and a gradual rectifying and uniform-flow air duct 11 is formed between the flow-uniform component and the air outlet of the backward-inclined centrifugal fan 5.

[0043] like Figure 7 , 8 As shown, the short board 10 is arranged on the left and right sides with the fan 5 as the center, and the short board 10 is arranged obliquely, and the angle between the inclined surface and the fan bottom plate 8 is 45°. The short board 10 forms an inclined surface through the triangular support plates 12 on both sides, and the angle between the triangular support plates 12 and the fan bottom plate 8 is the inclination angle of the short board 10, which also forms the air outlet angle.

[0044] Example 4: See Figures 10-11 As shown, a vector adjustment component of a volute-free fan, in this embodiment, its structure is basically similar to that of the third embodiment, the difference is that: the short plate 10 is centrally symmetrically distributed, such as Fig.10As shown, they are respectively located at the upper right corner and the lower left corner of the fan base plate 8. At this time, the arc surface of the long plate 9 connecting the short plates 10 on both sides also changes. The wind speed and wind direction of the fan outlet 4 change continuously with the curvature of the arc surface, thereby forming a gradual rectifying and uniform flow air duct 11, and then the air is discharged from the stamping hole 3. The short plate 10 is arranged inclined, and the angle between the inclined surface and the fan base plate 8 is 60°.

[0045] This embodiment is better than the third embodiment and is a preferred embodiment.

Claims

1. A vector control assembly for a volute-less fan, characterized in that: It includes a flow-uniform component and a rectifying and uniform-flow air duct arranged at the periphery of the fan outlet, wherein the flow-uniform component is mainly composed of a plurality of flow-uniform plates arranged along the fan outlet row, wherein a plurality of punching holes are opened on a symmetrically distributed flow-uniform plate, and a rectifying and uniform-flow space is provided between the flow-uniform component and the fan outlet, and the airflow entering the fan flows out from the air outlet through the impeller, and then flows out from the punching hole through the gradually changing rectifying space, thereby forming the rectifying and uniform-flow air duct; The flow-uniform component is composed of two symmetrically arranged long plates with parabolic curvatures and a short plate connecting the ends of the two long plates. The punching holes are distributed on the short plates, and a gradual rectifying and uniform flow air duct is formed between the flow-uniform component and the air outlet of the fan. The short plates are arranged in mirror symmetry or center symmetry; The short plate is arranged obliquely, and the angle between the inclined surface and the fan bottom plate is 30° to 60°; The distribution rate of the punching holes is 20%-40%.

2. The vector adjustment assembly of the volute-less fan according to claim 1, characterized in that: The flow equalizer plate is an annular flow equalizer plate, the bottom of which is fixed on the bottom plate of the fan, the punching holes are symmetrically distributed on both sides of the flow equalizer plate, and the flow equalizer plate with the punching holes has an inclination angle.

3. The vector adjustment assembly of the volute-less fan according to claim 2, characterized in that: The flow equalizer is composed of four straight plates at the front, rear, left and right sides and four curved plates connecting the four straight plates. The plates are fixedly connected by screws. The punching holes are located on the front and rear straight plates or the left and right straight plates.

4. The vector adjustment assembly of the volute-less fan according to claim 2, characterized in that: The flow equalizer plate is formed by connecting the left and right semi-annular plates, and the side plate where the punching hole is located is provided with a mounting hole. The punching hole is arranged on a flow equalizer orifice plate, and the flow equalizer orifice plate cooperates with the mounting hole and is movably connected to the mounting hole of the side plate.

5. The vector adjustment assembly of the volute-less fan according to claim 1, characterized in that: The punching holes are oval holes within 4×28 mm and are arranged in an array on the flow equalizer plate.

6. The vector adjustment assembly of a volute-less fan according to claim 1, characterized in that: The fan is a backward-inclined centrifugal fan without a volute, with an air inlet at the top and impeller-type air outlets around it. The fan is located in the middle of the fan base plate, and fixing holes are provided around the fan base plate for installation and fixation with the main equipment.

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