Current collector

Abstract

The utility model belongs to the technical field of fans, and particularly relates to a current collector. The current collector comprises a mounting disc and a flow guide ring, wherein a molded line of the flow guide ring is positioned in an area between a line c and a line d. The flow collector has the advantages that the flow collector is composed of the convergence section, the transition section and the diffusion section, after air flow enters the flow collector, the air flow is firstly and slowly accelerated to form high-speed air flow at the throat part, and then the air flow is uniformly diffused to fill the whole impeller passage. The flow collector can accelerate the gas flowing into the fan, so that the gas can uniformly flow into the impeller of the fan under the condition that the pressure loss is very small. The integral resistance is small, the airflow loss is less, the noise is low, and the fan efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and particularly relates to a collector. Background Art

[0002] The main body of the flow passage part of a centrifugal fan mainly consists of an impeller, a casing, and a collector. As a component of the centrifugal fan, the collector is a stationary flow guiding component, and its function is to introduce axial air intake into the fan impeller. The cross-sectional arc shape of the collector directly affects the form of the air flow entering the impeller, such as the smoothness of the inlet air flow and the intake noise.

[0003] When the air flow passes through the collector, it will be subject to frictional resistance and form resistance. Among them, the frictional resistance is generated by the viscosity of the fluid, and a very thin fluid layer with a large velocity gradient is formed on the side close to the wheel cover, that is, the boundary layer. The form resistance refers to the separation of the boundary layer and the generation of eddy currents when the fluid bypasses an object, resulting in air flow loss. The efficiency of the fan is thus affected and needs to be further improved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a collector with small resistance, less air flow loss, and high efficiency for the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: This collector includes a mounting disc and a guide ring, and the profile line of the guide ring is located in the area between line c and line d.

[0006] Line c includes a first arc segment, a second arc segment, and a first straight segment connected in sequence. The angle of the first arc segment is 78 degrees, the ratio of the radius Rc1 of the first arc segment to the impeller diameter is 0.086, the angle of the second arc segment is 16 degrees, the ratio of the radius Rc2 of the second arc segment to the impeller diameter is 0.1943, and the inclination angle of the first straight segment is 94 degrees.

[0007] Line d includes a third arc segment, a fourth arc segment, a fifth arc segment, and a second straight segment connected in sequence. The angle of the third arc segment is 22 degrees, the ratio of the radius Rd1 of the third arc segment to the impeller diameter is 0.057, the angle of the fourth arc segment is 63 degrees, the ratio of the radius Rd2 of the fourth arc segment to the impeller diameter is 0.0836, the angle of the fifth arc segment is 16 degrees, the ratio of the radius Rd3 of the fifth arc segment to the impeller diameter is 0.28, and the inclination angle of the second straight segment is 102 degrees.

[0008] In the above-mentioned air collector, when the impeller diameter is 250 mm, the profile line of the guide ring includes successively connected arc segment six, arc segment seven, and arc segment eight. The angle of arc segment six is 22 degrees, the radius YR2501 of arc segment six is 15 mm, the angle of arc segment seven is 63 degrees, the radius YR2502 of arc segment seven is 22 mm, the angle of arc segment eight is 16 degrees, the radius YR2503 of arc segment eight is 73.76, and the inclination angle of the tangent line at the end of arc segment eight is 102 degrees.

[0009] In the above-mentioned air collector, when the impeller diameter is 280 mm, the profile line of the guide ring includes successively connected arc segment nine, arc segment ten, and straight line segment three. The angle of arc segment nine is 78 degrees, the radius YR2801 of arc segment nine is 21.5 mm, the angle of arc segment ten is 16 degrees, the radius YR2802 of arc segment ten is 51.85 mm, the inclination angle of straight line segment three is 94 degrees, and the height of straight line segment three is 21 - 23 mm.

[0010] In the above-mentioned air collector, the ratio of the inlet diameter D1 of the air collector to the impeller diameter is 0.8 - 0.87, the ratio of the outlet diameter D2 of the air collector to the impeller diameter is 0.65 - 0.7, the ratio of the throat diameter D3 of the air collector to the impeller diameter is 0.65 - 0.67, and the ratio of the height of the air collector to the impeller diameter is 0.15 - 0.2.

[0011] In the above-mentioned air collector, when the impeller diameter is 250 mm, the inlet diameter D1 of the air collector is 204.5 mm, the outlet diameter D2 of the air collector is 171.4 mm, the throat diameter D3 of the air collector is 165.5 mm, and the height of the air collector is 40.7 mm.

[0012] In the above-mentioned air collector, when the impeller diameter is 280 mm, the inlet diameter D1 of the air collector is 238 mm, the outlet diameter D2 of the air collector is 193 mm, the throat diameter D3 of the air collector is 186 mm, and the height of the air collector is 53 mm.

[0013] Compared with the existing technology, the advantages of this air collector are as follows: The air collector is composed of a converging section, a transition section, and a diffusing section. After the air enters the air collector, it first accelerates slowly, forms a high-speed air flow at the throat, and then diffuses evenly to fill the entire impeller flow passage. The air collector can accelerate the air flowing into the fan, ensure that the air flows into the fan impeller evenly with very little pressure loss. The overall resistance is small, the air flow loss is small, the noise is small, and the fan efficiency is high. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of line c and line d provided by the present utility model.

[0015] Figure 2 It is a schematic structural diagram of wire c provided by the present utility model.

[0016] Figure 3 It is a schematic structural diagram of wire d provided by the present utility model.

[0017] Figure 4 It is a cross-sectional view of the current collector 250 provided by the present utility model.

[0018] Figure 5 It is a cross-sectional view of the current collector 280 provided by the present utility model.

[0019] In the figure, overall reference numerals: mounting plate 7, flow guiding ring 8, inlet diameter D1, outlet diameter D2, throat diameter D3;

[0020] Reference numerals of wire c: arc segment one Yc1, arc segment two Yc2, straight segment one Yc3, radius Rc1 of arc segment one, radius Rc2 of arc segment two;

[0021] Reference numerals of wire d: arc segment three Yd1, arc segment four Yd2, arc segment five Yd3, straight segment two Yd4, radius Rd1 of arc segment three, radius Rd2 of arc segment four, radius Rd3 of arc segment five;

[0022] Reference numerals of the 250mm current collector: arc segment six Y2501, arc segment seven Y2502, arc segment eight Y2503, radius YR2501 of arc segment six, radius YR2502 of arc segment seven, radius YR2503 of arc segment eight;

[0023] Reference numerals of the 280mm current collector: arc segment nine Y2801, arc segment ten Y2802, straight segment three Y2803, radius YR2801 of arc segment nine, radius YR2802 of arc segment ten. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] As Figure 1 、 2 、and shown in 3, this current collector includes a mounting plate 7 and a flow guiding ring 8. The profile line of the flow guiding ring 8 is located in the region F between wire c and wire d.

[0027] Line c includes an arc segment 1 Yc1, an arc segment 2 Yc2, and a straight line segment 1 Yc3 that are connected in sequence. The angle of arc segment 1 Yc1 is 78 degrees, and the ratio of the radius Rc1 of arc segment 1 Yc1 to the impeller diameter is 0.086. The angle of arc segment 2 Yc2 is 16 degrees, and the ratio of the radius Rc2 of arc segment 2 Yc2 to the impeller diameter is 0.1943. The inclination angle of straight line segment 1 Yc3 is 94 degrees.

[0028] Line d includes an arc segment 3 Yd1, an arc segment 4 Yd2, an arc segment 5 Yd3, and a straight line segment 2 Yd4 that are connected in sequence. The angle of arc segment 3 Yd1 is 22 degrees, and the ratio of the radius Rd1 of arc segment 3 Yd1 to the impeller diameter is 0.057. The angle of arc segment 4 Yd2 is 63 degrees, and the ratio of the radius Rd2 of arc segment 4 Yd2 to the impeller diameter is 0.0836. The angle of arc segment 5 Yd3 is 16 degrees, and the ratio of the radius Rd3 of arc segment 5 Yd3 to the impeller diameter is 0.28. The inclination angle of straight line segment 2 Yd4 is 102 degrees.

[0029] The ratio of the inlet diameter D1 of the air collector to the impeller diameter is 0.8 - 0.87. The ratio of the outlet diameter D2 of the air collector to the impeller diameter is 0.65 - 0.7. The ratio of the throat diameter D3 of the air collector to the impeller diameter is 0.65 - 0.67. The ratio of the height of the air collector to the impeller diameter is 0.15 - 0.2.

[0030] The air collector consists of three parts: a converging section, a transition section, and a diffusing section. After the air enters the air collector, it first accelerates slowly, forms a high-speed air flow at the throat, and then diffuses evenly to fill the entire impeller passage. The air collector can accelerate the gas flowing into the fan, ensuring that the gas flows into the fan impeller evenly with very little pressure loss. It has a small overall resistance, less air flow loss, low noise, and high fan efficiency.

[0031] Embodiment 2

[0032] As Figure 4 shown, this air collector is adapted to a fan impeller with an impeller diameter of 250 mm. The profile line of the guide ring 8 includes an arc segment 6 Y2501, an arc segment 7 Y2502, and an arc segment 8 Y2503 that are connected in sequence. The angle of arc segment 6 Y2501 is 22 degrees, the radius YR2501 of arc segment 6 Y2501 is 15 mm, the angle of arc segment 7 Y2502 is 63 degrees, the radius YR2502 of arc segment 7 Y2502 is 22 mm, the angle of arc segment 8 Y2503 is 16 degrees, the radius YR2503 of arc segment 8 Y2503 is 73.76, and the inclination angle of the tangent line at the end of arc segment 8 Y2503 is 102 degrees.

[0033] The inlet diameter D1 of the air collector is 204.5 mm, the outlet diameter D2 of the air collector is 171.4 mm, the throat diameter D3 of the air collector is 165.5 mm, and the height of the air collector is 40.7 mm.

[0034] Embodiment 3

[0035] As Figure 5 shown, this air collector is adapted to a fan impeller with an impeller diameter of 280 mm. The profile line of the guide ring 8 includes an arc segment nine Y2801, an arc segment ten Y2802, and a straight segment three Y2803 that are connected in sequence. The angle of the arc segment nine Y2801 is 78 degrees, the radius YR2801 of the arc segment nine Y2801 is 21.5 mm, the angle of the arc segment ten Y2802 is 16 degrees, the radius YR2802 of the arc segment ten Y2802 is 51.85 mm, the inclination angle of the straight segment three Y2803 is 94 degrees, and the height of the straight segment three Y2803 is 21 - 23 mm, preferably 22 mm.

[0036] The inlet diameter D1 of the air collector is 238 mm, the outlet diameter D2 of the air collector is 193 mm, the throat diameter D3 of the air collector is 186 mm, and the height of the air collector is 53 mm.

[0037] The method for determining the inclination angle in this article: If it is an arc segment, the inclination angle at a certain point on it is to draw a tangent line at that point, and then draw a horizontal line extending towards the center of the fan through the upper end of the tangent line. The angle between this horizontal line and the tangent line is the inclination angle of that point on the arc segment; if it is a straight segment, then draw a horizontal line extending towards the center of the fan through the upper end of the straight segment. The angle between this horizontal line and the straight segment is the inclination angle of the straight segment.

[0038] The specific embodiments described in this article are only examples of the present utility model. Those skilled in the technical field to which the present utility model belongs can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the present utility model or exceed the scope defined by the appended claims.

[0039] Although this article uses more terms, it does not exclude the possibility of using other terms. Using these terms is only for more conveniently describing and explaining the essence of the present utility model; interpreting them as any additional limitation is contrary to the present utility model.

Claims

1. A current collector, comprising a mounting plate (7) and a guide ring (8), characterized in that: The profile of the guide ring (8) is located in the area between line c and line d. Line c includes arc segment 1 (Yc1), arc segment 2 (Yc2) and straight line segment 1 (Yc3) connected in sequence, the angle of arc segment 1 (Yc1) is 78 degrees, the ratio of radius Rc1 of arc segment 1 (Yc1) to impeller diameter is 0.086, the angle of arc segment 2 (Yc2) is 16 degrees, the ratio of radius Rc2 of arc segment 2 (Yc2) to impeller diameter is 0.1943, and the inclination angle of straight line segment 1 (Yc3) is 94 degrees. Line d includes arc segment three (Yd1), arc segment four (Yd2), arc segment five (Yd3) and straight line segment two (Yd4) which are connected in sequence. The angle of arc segment three (Yd1) is 22 degrees, and the ratio of the radius Rd1 of arc segment three (Yd1) to the impeller diameter is 0.

057. The angle of arc segment four (Yd2) is 63 degrees, and the ratio of the radius Rd2 of arc segment four (Yd2) to the impeller diameter is 0.0836. The angle of arc segment five (Yd3) is 16 degrees, and the ratio of the radius Rd3 of arc segment five (Yd3) to the impeller diameter is 0.

28. The inclination angle of straight line segment two (Yd4) is 102 degrees.

2. The current collector according to claim 1, characterized in that: When the impeller diameter is 250 mm, the profile of the guide ring (8) includes arc segment six (Y2501), arc segment seven (Y2502), and arc segment eight (Y2503) which are connected in sequence. The angle of arc segment six (Y2501) is 22 degrees, the radius YR2501 of arc segment six (Y2501) is 15 mm, the angle of arc segment seven (Y2502) is 63 degrees, the radius YR2502 of arc segment seven (Y2502) is 22 mm, the angle of arc segment eight (Y2503) is 16 degrees, the radius YR2503 of arc segment eight (Y2503) is 73.76, and the inclination angle of the tangent line at the end point of arc segment eight (Y2503) is 102 degrees.

3. The current collector according to claim 1, characterized in that: When the impeller diameter is 280 mm, the profile of the guide ring (8) includes arc segment nine (Y2801), arc segment ten (Y2802), and straight line segment three (Y2803) which are connected in sequence, the angle of arc segment nine (Y2801) is 78 degrees, the radius YR2801 of arc segment nine (Y2801) is 21.5 mm, the angle of arc segment ten (Y2802) is 16 degrees, the radius YR2802 of arc segment ten (Y2802) is 51.85 mm, the inclination angle of straight line segment three (Y2803) is 94 degrees, and the height of straight line segment three (Y2803) is 21-23 mm.

4. The current collector according to claim 1, 2 or 3, characterized in that: The ratio of the collector's air inlet diameter D1 to the impeller diameter is 0.8-0.87, the ratio of the collector's air outlet diameter D2 to the impeller diameter is 0.65-0.7, the ratio of the collector's throat diameter D3 to the impeller diameter is 0.65-0.67, and the ratio of the collector's height to the impeller diameter is 0.15-0.

2.

5. The current collector according to claim 4, characterized in that: When the impeller diameter is 250 mm, the air inlet diameter D1 of the collector is 204.5 mm, the air outlet diameter D2 of the collector is 171.4 mm, the throat diameter D3 of the collector is 165.5 mm, and the height of the collector is 40.7 mm.

6. The current collector according to claim 4, characterized in that: When the impeller diameter is 280 mm, the air inlet diameter D1 of the collector is 238 mm, the air outlet diameter D2 of the collector is 193 mm, the throat diameter D3 of the collector is 186 mm, and the height of the collector is 53 mm.

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