阅读说明：本技术 过滤系统 (Filter system ) 是由 孙正和 于 2018-09-05 设计创作，主要内容包括：本发明提供的过滤系统,有同一延伸线上的入口通道及出口通道的壳体；导流机构,朝入口通道方向渐缩的第一渐缩部、朝出口通道方向渐缩的第二渐缩部及多个叶片,叶片相对于延伸线螺旋地延伸于第一渐缩部,叶片与壳体的内壁之间形成一间隙,该间隙小于叶片相对第一渐缩部的表面的高度。可缩小该过滤系统的体积且具有较佳的过滤分离效果。进一步的,叶片应用了三维摆线。各叶片平行于第一渐缩部的表面的任一截面系各位于一摆线上。藉此,含尘气体由入口通道进入后,于在叶片上沿滞留时间最短的路径移动,进而减少因摩擦力所造成的动能损失。因此,离心分离效果较佳,且可降低动力源将含尘气体送入过滤系统时所需功率。(The invention provides a filter system, which comprises a shell with an inlet channel and an outlet channel on the same extension line; the guide mechanism comprises a first reducing part reducing towards the direction of the inlet channel, a second reducing part reducing towards the direction of the outlet channel and a plurality of blades, wherein the blades spirally extend to the first reducing part relative to the extension line, and a gap is formed between the blades and the inner wall of the shell and is smaller than the height of the blades relative to the surface of the first reducing part. The volume of the filtering system can be reduced and the filtering and separating effects are better. Further, the vanes employ a three-dimensional cycloid. Any cross section of each blade parallel to the surface of the first tapered portion is located on a cycloid. Therefore, after entering from the inlet channel, the dust-containing gas moves on the blade along the path with the shortest residence time, and further reduces the kinetic energy loss caused by friction. Therefore, the centrifugal separation effect is better, and the power required by the power source for sending the dust-containing gas into the filtering system can be reduced.)

1. A filtration system, comprising:

a housing including an inlet passage and an outlet passage on the same extension line;

and the guide mechanism comprises a first tapered part tapered towards the inlet channel, a second tapered part tapered towards the outlet channel and a plurality of blades, the plurality of blades spirally extend to the first tapered part relative to the extension line, and a gap is formed between the plurality of blades and the inner wall of the shell and is smaller than the height of the blades relative to the surface of the first tapered part.

2. A filter system as claimed in claim 1, wherein the housing further comprises a dust exhaust passage extending transversely to the extension line, the dust exhaust passage being located radially outwardly of the outlet passage.

3. A filter system as claimed in claim 2, wherein the outlet passage comprises a tube connected to the housing and a peripheral flange arranged outside the tube, which flange is at least partly within the tube, viewed in an axial direction of the dust channel.

4. A filter system as claimed in claim 3, wherein the stop edge is divergent in the direction of the outlet passage.

5. The filtration system according to claim 3, wherein said flap is provided with a plurality of fins, the extending direction of said plurality of fins being forward to the spiral direction of said blade.

6. The filtration system of claim 5, wherein the flap is integrally stamped and formed with a plurality of through holes and the plurality of fins.

7. A filter system as in claim 1 wherein the housing further comprises a flared portion diverging from the inlet passage in a direction toward the outlet passage, the plurality of vanes and the flared portion forming the gap.

8. A filter system as in claim 7 wherein the first tapered portion and the plurality of vane portions extend into the inlet passage.

9. A filter system as in claim 1, wherein a surface of the second tapered portion extends through the outlet passage.

10. The filtration system of claim 1, wherein the flow directing mechanism is supported in connection with the outlet passage by at least one support member.

11. A filter system as claimed in claim 1, wherein an end face of each of said blades is a chamfer which follows the helical direction of said blade.

12. A filter system as claimed in claim 6, wherein the stop edge is divergent in the direction of the outlet passage; the housing further includes a flared portion gradually expanding from the inlet channel toward the outlet channel, the plurality of blades and the flared portion forming the gap; the first tapered portion and the plurality of blade portions extend into the inlet passage; a surface of the second tapered portion extending through the outlet passage; the flow guiding mechanism is connected and supported to the outlet channel through at least one set of supporting members; the supporting members are plural; a turning part is arranged between the first reducing part and the second reducing part, and the group of supporting pieces are connected with the turning part and the outlet channel; the first gradually-shrinking portion and the second gradually-shrinking portion are both cones; the taper angle of the first tapered portion is not greater than the taper angle of the second tapered portion; the distance between a section of the turning part transverse to the extension line and the outlet channel is not more than 2 times of the conical height of the second tapered part; one end surface of each blade is an inclined surface which is in the same direction as the spiral direction of the blade.

13. A filter system as claimed in any one of claims 1 to 12, wherein each vane has a cycloidal profile.

14. A filter system as in claim 13 wherein any cross-section of each of the vanes parallel to the surface of the first tapered portion is each on a cycloid.

Technical Field

The invention relates to the field of gas filtration, in particular to a filtration system.

Background

Generally, the dust-containing gas is filtered by causing the dust-containing gas to swirl and separating the dust flowing outside the swirling flow from the dust-containing gas by the centrifugal force principle. Therefore, the device has a cylindrical housing forming a swirling flow space and a guide mechanism for causing swirling flow of the dust-containing gas inside the housing. The structural design of the flow guide mechanism and the matching between the flow guide mechanism and the shell directly influence the filtering effect of dust gas. However, in the prior art, the filter device is not well configured, so that the gas swirling flow cannot be effectively utilized, resulting in poor filtering effect.

Therefore, there is a need for a new and improved filtration system to solve the above problems.

Disclosure of Invention

The invention mainly aims to provide a filtering system with high separation efficiency.

To achieve the above object, the present invention provides a filter system, comprising: a housing including an inlet passage and an outlet passage on the same extension line; and the guide mechanism comprises a first tapered part tapered towards the inlet channel, a second tapered part tapered towards the outlet channel and a plurality of blades, the plurality of blades spirally extend to the first tapered part relative to the extension line, and a gap is formed between the plurality of blades and the inner wall of the shell and is smaller than the height of the blades relative to the surface of the first tapered part.

Preferably, the housing further comprises a dust exhaust channel extending transversely to the extension line, the dust exhaust channel being located radially outside the outlet channel.

Preferably, the outlet channel includes a pipe connected to the housing and a blocking edge surrounding the pipe, and the blocking edge and at least the pipe fixing portion are located within the pipe when viewed along an axial direction of the dust exhaust channel.

Preferably, the retaining edge is divergent in the direction of the outlet channel.

Preferably, in the above aspect, the flap includes a plurality of fins, and an extending direction of the plurality of fins is oriented in the screw direction of the blade.

Preferably, the flap is integrally punched to form a plurality of through holes and a plurality of fins.

Preferably, the housing further includes a flared portion gradually expanding from the inlet channel toward the outlet channel, and the plurality of blades and the flared portion form the gap.

Preferably, the first tapered portion and the plurality of vanes are partially overlapped with the inlet passage.

Preferably, a surface of the second tapered portion extends through the outlet passage.

Preferably, the flow guiding mechanism is connected and supported to the outlet channel via at least one support member.

Preferably, one end surface of each of the blades is a bevel surface, and the bevel surface is oriented along the spiral direction of the blade.

Preferably, the blocking edge is gradually expanded towards the outlet channel; the casing further comprises a flared part gradually expanding from the inlet channel to the outlet channel, and the plurality of blades and the flared part form the gap; the first tapered portion and the plurality of blade portions extend into the inlet passage; a surface of the second tapered portion extending through the outlet passage; the flow guiding mechanism is connected and supported to the outlet channel through at least one set of supporting members; the supporting members are plural; a turning part is arranged between the first reducing part and the second reducing part, and the group of supporting pieces are connected with the turning part and the outlet channel; the first gradually-shrinking portion and the second gradually-shrinking portion are both cones; the taper angle of the first tapered portion is not greater than the taper angle of the second tapered portion; the distance between a section of the turning part transverse to the extension line and the outlet channel is not more than 2 times of the conical height of the second tapered part; one end surface of each blade is an inclined surface which is in the same direction as the spiral direction of the blade.

Preferably, the blade has a cycloidal profile.

Preferably, any cross section of each of the vanes parallel to the surface of the first tapered portion is located on a cycloid line.

The invention provides a filter system, which comprises a shell with an inlet channel and an outlet channel on the same extension line; the guide mechanism comprises a first reducing part reducing towards the direction of the inlet channel, a second reducing part reducing towards the direction of the outlet channel and a plurality of blades, wherein the blades spirally extend to the first reducing part relative to the extension line, and a gap is formed between the blades and the inner wall of the shell and is smaller than the height of the blades relative to the surface of the first reducing part. The volume of the filtering system can be reduced and the filtering and separating effects are better. Further, the vanes employ a three-dimensional cycloid. Any cross section of each blade parallel to the surface of the first tapered portion is located on a cycloid. Therefore, after entering from the inlet channel, the dust-containing gas moves on the blade along the path with the shortest residence time, and further reduces the kinetic energy loss caused by friction. Therefore, the centrifugal separation effect is better, and the power required by the power source for sending the dust-containing gas into the filtering system can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a perspective view, partially in section, of a preferred embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of a preferred embodiment of the present invention;

FIG. 3 is a partial cross-sectional view from another perspective in accordance with a preferred embodiment of the present invention;

FIG. 4 is a perspective view of a retaining edge in accordance with a preferred embodiment of the present invention;

FIG. 5 is a side view of a deflector mechanism according to a preferred embodiment of the invention;

figure 6 is a schematic view of a two-dimensional cycloid;

FIG. 7 is a schematic view of a three-dimensional cycloid;

1: a filtration system; 10: a housing; 11: an inlet channel; 12: an outlet channel; 121: a pipe fitting; 122: a flange; 123: a fin; 124: through holes are formed; 13: a dust exhaust channel; 14: a flared part; 20: a flow guide mechanism; 21: a first tapered portion; 22: a second tapered portion; 221: surface extension; 23: a blade; 231: a bevel; 24: a support member; 25: a turning part; 30: a gap; l: an extension line; h: a height; l1: a distance; l2: the height of the cone; c: and (4) a cycloid.

Detailed Description

The following description is given by way of example only, and is not intended to limit the scope of the invention.

Referring to fig. 1 to 5, which illustrate a preferred embodiment of the present invention, a filtration system 1 of the present invention includes a housing 10 and a flow guide mechanism 20.

The housing 10 includes an inlet channel 11 and an outlet channel 12 on the same extension line L; the flow guiding mechanism 20 includes a first tapering portion 21 tapering toward the inlet channel 11, a second tapering portion 22 tapering toward the outlet channel 12, and a plurality of vanes 23, the vanes 23 spirally extend from the first tapering portion 21 relative to the extension line L, a gap 30 is formed between the vanes 23 and the inner wall of the housing 10, and the gap 30 is smaller than a height h of the vanes 23 relative to the surface of the first tapering portion 21. The housing 10, the inlet channel 11, the outlet channel 12, the first tapered portion 21 and the second tapered portion 22 preferably have circular cross-sections with minimum flow resistance and minimum kinetic energy loss. Thereby forming a swirling flow and having a high separation efficiency.

The housing 10 further includes a dust exhaust passage 13 extending transversely to the extension line L, and the dust exhaust passage 13 is preferably located radially outside the outlet passage 12 and eccentrically with respect to the extension line L so as to be located at the periphery of the swirling flow, thereby improving dust collection efficiency. In this embodiment, the dust exhaust channel 13 is a square tube and is connected with a round tube in a tapered manner along the radial direction of the outlet channel 12; the dust exhaust channel can also be a round tube as a whole, so that the rotational flow kinetic energy is not reduced and the dirt is not blocked. However, the dust exhaust channel may also have different cross-sectional variations.

The outlet passage 12 includes a pipe 121 connected to the housing 10 and a peripheral flange 122 disposed outside the pipe 121, and the flange 122 is at least partially located within the pipe 121 when viewed along an axial direction of the dust exhaust passage 13. Thereby, the blocking edge 122 prevents the dust from the centrifugal separation from reversely swirling along the space between the housing 10 and the pipe 121 to enter the outlet channel 12. In detail, the stop edge 122 is tapered toward the outlet channel 12 to form a conical surface. The flange 122 is provided with a plurality of fins 123, and the extending direction of the fins 123 is in the forward direction of the screw direction of the blade 23, so that dust can be effectively blocked and reliably dropped into the dust exhaust channel 13 to be exhausted. The blocking edge 122 is preferably formed by integrally punching and penetrating a plurality of through holes 124 and the plurality of fins 123, the structure and the manufacture are simple, the plurality of through holes 124 allow the air to flow through, have a flow guiding effect, effectively avoid the vortex generated behind the blocking edge 122, and maintain the vortex of the air inside the casing 10.

The housing 10 further includes a flared portion 14 gradually expanding from the inlet channel 11 toward the outlet channel 12, and preferably, the flared portion 14 is detachably connected to facilitate disassembly, replacement, cleaning and maintenance. The plurality of blades 23 and the flared portion 14 form the gap 30, so that the dust-containing gas can smoothly pass through without reducing the swirling velocity and without generating accumulation. Depending on the blade configuration, the gap 30 may be gradually enlarged, gradually reduced or equidistantly arranged toward the inlet channel 11 or the outlet channel 12, and the proper configuration may provide the effect of compressing and accelerating the airflow. The first tapered portion 21 and the vane 23 partially extend into the inlet channel 11, so that the dust-containing gas can start to guide the swirling flow in the inlet channel 11 and is not easy to accumulate and block. An end face of each of the blades 23 is preferably a slope 231, and the slope 231 is oriented in the spiral direction of the blade 23, so that the swirling flow is not affected and the energy loss is minimized.

A surface 221 of the second tapered portion 22 extends through the outlet channel 12 and directs the flow of air into the outlet channel 12. The flow directing mechanism 20 is supported in connection with the outlet passage 12 via at least one support member 24. The at least one support 24 is preferably plural, a turning part 25 is provided between the first tapering part 21 and the second tapering part 22, the plural support 24 is connected to the turning part 25 and the outlet passage 12, increasing the stability without affecting the swirling flow (especially the radially outer and dust-rich part). However, the diversion mechanism 20 can also be connected to and supported by the inner wall of the housing 10. In the present embodiment, the first tapered portion 21 and the second tapered portion 22 are both conical; the taper angle of the first tapered portion 21 is not greater than the taper angle of the second tapered portion 22; the distance L1 between a cross section of the turning part 25 transverse to the extension line L and the outlet channel 12 is not more than 2 times of the taper height L2 of the second tapered part 22, and if a proper taper angle of the second tapered part 22 is matched, the airflow for separating dust tends to flow along the second tapered part 22 due to Coanda Effect (or wall attachment Effect), so that the airflow for separating dust flows into the outlet channel 12, the volume of the filtering system 1 can be reduced, and the filtering and separating Effect is better.

With the above structure, the flow guiding mechanism 20 can guide the dust-containing gas to flow smoothly without forming turbulent flow and minimize the kinetic energy loss. When the dust-containing gas flows in from the inlet channel 11, the plurality of blades 23 of the first tapering portion 21 guide the dust-containing gas to form a rotational flow about the extension line L. At this time, the dust with a larger mass than the gas swirls outward in the inertial direction due to a larger centrifugal force, and is discharged through the dust discharge passage 13; the gas with smaller mass swirls inside the swirling flow and flows into the outlet channel 12 along the second tapering portion 22 by wall attachment, thereby shortening the gas flow distance and achieving the separation and filtration effect. Therefore, the filter system 1 has low kinetic energy loss and smaller volume, and is convenient to move, load and unload.

Preferably, each of the vanes 23 has a cycloidal C profile providing the shortest path for the direction change of the dusty gas to increase the separation efficiency. Cycloidal (Cycloidal Curve) is defined as a locus formed by a point P on a circle having a radius r when the circle rolls on the x-axis without sliding (see fig. 6), and represents a Cycloidal as a function of a rotation angle t, and the function is represented by [ equation 1] and [ equation 2] shown below when the circle has a radius r and a rotation angle t.

[ mathematical formula 1]

x＝r×(t-sin(t))

[ mathematical formula 2]

y＝r×(1-cos(t))

In order to convert a two-dimensional planar cycloid into a three-dimensional cycloid, if a Differential Function (Differential Function) representing a Tangential Slope (Tangential Slope) of each point on the cycloid is listed, it is a Velocity Function (Velocity Function) using the cycloid, as shown in [ equation 3] below.

[ mathematical formula 3]

As shown in fig. 7, the functional expressions of a circle having a radius r with reference to the origin C1 centered at the origin C1 on the X-Y coordinate are shown in the following [ equation 4] and [ equation 5] for each rotation angle t.

[ mathematical formula 4]

x＝r×cos(t)

[ math figure 5]

y＝r×sin(t)

In order to derive a three-dimensional cycloid function formula using this velocity function formula, when the function formula of the circle is rotated by an angle t every time around the origin C1, the velocity function formula of the differential function formula listed above is used as the Z axis, the center point of the circle is simultaneously moved from C1 to C2 on the Z axis, and the angle t is moved every time, the trajectory along which an arbitrary point P on the circle moves on a cylindrical surface having C1 as the midpoint, a circle having a radius r as the bottom edge, and a height equal to the distance from C1 to C2 becomes a three-dimensional cycloid, and the function formula of the three-dimensional cycloid is shown in the following [ equation 6] to [ equation 8 ].

[ mathematical formula 6]

x＝r×cos(t)

[ math figure 7]

y＝r×sin(t)

[ mathematical formula 8]

The vanes 23 of the flow guide mechanism 20 of the present invention employ a three-dimensional cycloid. When a three-dimensional cycloid formed on a cylindrical surface is plotted, if the value of the radius r of the circle is gradually changed according to the cone, a three-dimensional cycloid expressed on the surface of the cone is formed. Any cross section of each vane 23 parallel to the surface of the first tapered portion 21 is located on a cycloid C. Therefore, the dust-containing gas enters from the inlet channel 11 and moves on the plurality of blades 23 along the path with the shortest residence time, thereby reducing the kinetic energy loss caused by friction. Therefore, the centrifugal separation effect is better, and the power required by a power source (such as a blower) to send the dust-containing gas into the filtering system 1 can be reduced.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.