CN111643971A - Gas purification disc and gas purification device - Google Patents

Abstract

A gas purification disk comprising a first disk provided with holes for connection to a rotary drive, a second disk and spokes, the axis of rotation of the first disk coinciding with the axis of rotation of the second disk; the first disk and the second disk are detachably connected together; wherein the first disc is provided with an annular stop surface, the rotational axis of which coincides with the rotational axis of the first disc; the spokes have stop surfaces thereon. When the gas purification disc is used, the gas purification disc is convenient to install, free of welding points, free of stress inside spokes, high in filtering efficiency, small in wind resistance, low in power and low in energy consumption.

Description

Gas purification disc and gas purification device

Technical Field

The present invention relates to a gas cleaning disc, in particular for removing liquid droplets or solid particles from a gas.

Technical Field

With the increasing development of economy, people have higher and higher requirements on the air quality of the environment. On one hand, the air quality requirement of the residential environment is improved, and the oil smoke in the kitchen can have great influence on the whole household environment; on the other hand, the air quality in the natural environment is also required to be improved, and the PM2.5 in the atmosphere is increased, which has attracted social attention.

On one hand, kitchen oil smoke harms the respiratory tract health of family members, on the other hand, after being discharged to the atmosphere, aerosol can be generated, and the PM2.5 index is improved; the air quality is seriously affected by a large amount of emission.

The existing kitchen flue gas treatment device is very various, for example, the traditional electrostatic adsorption device has, but the traditional electrostatic adsorption device has serious defects, poor effect and low efficiency. Some range hoods directly suck air in a kitchen through negative pressure and filter oil smoke through a filter screen, and the oil smoke cannot be completely removed in the mode.

A mechanical soot removing device has appeared in recent years. The mechanical oil smoke removing device is provided with an exhaust fan at the upper part for upwards extracting smoke, a gas purification disc is arranged below the exhaust fan, a plurality of spokes are arranged on the gas purification disc, the gas purification disc is in a rotating state during purification, and when air with oil smoke is extracted by the negative pressure of the exhaust fan, the air with oil smoke passes through the gas purification disc; the spoke on the gas purification dish rotates at a high speed, collides oil smoke liquid drop or other particles in the air, and oil smoke liquid drop or other particles can adhere on the spoke, changes the direction of motion under the effect of spoke, is tangential motion along the spoke, and then final motion is hit to the purification dish periphery and is hit on the clarifier inner wall and final landing is collected.

The existing mechanical oil fume removing device has some problems: 1. the spokes are fixed to the gas purification disk by welding, which brings about some obvious drawbacks. Firstly, when the spokes are welded on the hub of the gas purification disc, because the welding is a connection mode needing heating, after cooling, the spokes made of metal and the gas purification disc can deform to a certain degree, so that the shape of the gas purification disc is influenced; secondly, since the spokes are welded to the hub and spokes of the gas purification disk, the spokes are deformed to a certain extent, and in order to limit the gas purification disk caused by the deformation, the gas purification disk needs to have an outer ring so as to fix the spokes (see fig. 1); third, since the spokes are welded to the hub, once the weld is loosened, the spokes may fall off and shoot out at high speed during high speed rotation, resulting in personal injury. 2. The welding of the spokes is difficult. When the spokes are welded on the spokes, the spokes need to be uniformly distributed on the spokes, so that a separate clamp needs to be designed for clamping the spokes and the hub; in addition, the number of solder joints is large and small, and soldering is difficult. 3. The spoke shape is single, mainly circular, and some parts adopt other shapes. Circular spoke simple to operate, but the product of diameter and quantity receives the restriction of the diameter of wheel hub, in order to improve purification efficiency, needs to improve the rotational speed of gas purification dish, has had higher requirement to the rotational speed of whole gas purification dish like this. 4. The spokes have a large wind resistance due to the shape of the gas purification disk, and a more powerful exhaust fan is required to provide sufficient negative pressure, which leads to an increase in the manufacturing cost, volume and noise of the mechanical soot removing device. 5. Once the spokes deform, the gaps of the spokes change, and as the gaps of the spokes change, part of gas passes through the gas purifying disc, oil drops, oil mist and other solid particles are not removed, and the atmosphere can still be polluted.

Chinese patent No. CN109794102A discloses a gas purification unit, which comprises a central disc and at least 6 spokes, wherein the spokes are radially extended and arranged on the central disc, the inner ends of the spokes are fixed on the central disc, the central disc is connected with a driving device for driving the central disc to rotate, and one side of the spokes in the rotation direction is provided with at least one concave diversion trench.

The above patent documents show different forms of gas purification disks, respectively, but all face the above-mentioned problems. The technical scheme provided by the invention can realize the following technical effects:

1. the spokes and the hub of the gas purification disk are not required to be connected by welding, so that the gas purification disk is convenient to mount and has no potential safety hazard; the spokes are connected to the hub of the gas purification disc in a clamping mode, a clamp is not needed for fixing, welding points do not exist, and the gas purification disc is convenient to process and safe and reliable to use;

2. the spokes of the gas purification disk are not connected with the hub by welding, the spokes have no internal stress, and the gas purification disk has long service life.

3. The spoke shape of the gas purification disk improves the purification efficiency of the spokes, and under the condition that the number of the spokes is the same, the purification efficiency of the gas purification disk is greatly improved.

4. The gas purifying disc of the invention has relatively low rotating speed, low equipment cost and good energy-saving effect.

5. The gas purification disk has small wind resistance and good filtering effect in the actual use process, and effectively reduces the manufacturing cost of equipment under the condition of the same filtering effect.

Disclosure of Invention

The invention provides a gas purification disc, which comprises a first disc, a second disc and spokes, wherein the first disc is provided with holes connected to a rotary driving device, and the rotary axis of the first disc is coincident with that of the second disc; the first disk and the second disk are detachably connected together; wherein the first disc is provided with an annular stop surface, the rotational axis of which coincides with the rotational axis of the first disc; the spokes have stop surfaces thereon.

The section shapes of the spokes along the center line direction of the spokes are the same, and the spokes are provided with a first surface and a second surface, wherein the intersection line formed by the first surface and a plane perpendicular to the center line of the spokes is a first intersection line which is in a function curve shape; wherein the second surface forms a second intersection with a plane perpendicular to the centerline of the spoke.

Wherein the first intersection line has a protrusion formed by the intersection of a first curved segment and a second curved segment, the intersection of the first curved segment and the second curved segment being at a greater vertical distance from the centerline of the spoke in a plane perpendicular to the spoke than other points on the first intersection line.

Wherein the surface of the bearing block is a cylindrical surface, a circular table surface or a rotating curved surface of a function curve; wherein the stop surface corresponds to the shape of the stop surface.

The hub is characterized by also comprising a plurality of fixed blocks arranged along the circumference of the hub, wherein a groove is formed between every two adjacent fixed blocks; spokes are mounted in the grooves.

Wherein the ratio of the thickness direction dimension to the width direction dimension of the spokes is 1:1.2 to 4, preferably 1: 2; wherein the slot is dimensioned to correspond to the dimensions of the spokes.

The plurality of fixed blocks and the first disc are integrally formed or the plurality of fixed blocks are fixed through the fixing ring.

Wherein the spokes and the fixing block form an interference fit.

The stop surface, the spokes, and the fixing means are disposed between the first disk and the second disk, which are fixed by the fastening means.

A gas cleaning device comprises a driving device and the gas cleaning disk of the invention.

According to the technical scheme, the wind resistance of the gas purification disc is reduced, and the spokes and the hub can be connected without welding, so that the overall cost of equipment is reduced, and the safety of the equipment is improved.

Drawings

FIG. 1 illustrates a prior art welded gas purge disk;

FIG. 2 shows a gas purification panel diagram of the present invention;

FIG. 3 shows a schematic view of the gas purification disk of the present invention with the second disk (or first disk) removed;

FIG. 4 shows a spoke elevation view of the present invention;

FIG. 5 shows an enlarged partial view of the spoke of FIG. 3;

6-7 show cross-sectional views of the spokes;

FIG. 8 shows a perspective view of a spoke (including a stop surface);

figure 9 shows a schematic view of the first (or second) disc and the fixing means of the invention, separable;

FIG. 10 shows a schematic view of the inseparability of the first disk (or second disk) and the fixture of the present invention;

FIG. 11 shows a schematic view of a first disc (or a second disc) of the present invention that does not include a fixture;

FIG. 12 shows a schematic view of a fixture of the present invention;

FIG. 13 shows a schematic view of a first disk with partial spokes installed and a fixture;

fig. 14 shows a schematic view of the engagement of the stop surface of the spoke and the stop surface of the first disk.

Examples of the invention

Referring to fig. 1, fig. 1 shows a gas purification disk consisting of an outer ring 100, spokes 200 and a hub 300. The spokes 200 are welded to the outer ring 100 and the hub 300, respectively. Because spoke 200 and hub 300 welded connection, can be heated in the spoke 200 and the hub 300 junction joining process, after the cooling, the spoke can take place certain degree with the hub junction and warp, if the spoke does not pass through welded connection with outer ring 100, then whole gas purification dish can lead to the spoke to distribute inhomogeneously in the circumferential direction because the deformation of spoke. The uneven distribution of the spokes causes the problems of poor dynamic balance effect, poor gas purification effect and the like. The gas purification disk needs to be fixed on a shaft and driven by a motor, and if the dynamic balance has a large problem, the shaft and the motor are very easy to damage.

As shown in fig. 2, is a schematic view of the gas purification disk of the present invention. In fig. 2, the spokes 2 have a particular shape and the spokes 2 are clampingly connected to the hub 3 by a stop surface. In fig. 2, the spoke 2 is not connected to the hub 3 in a welding manner, so that the spoke 2 does not have the situations of insufficient solder, loose welding point and the like, and the situation that the spoke 2 drops suddenly to cause injury to workers in the working process can be avoided. Another advantage of the clamping of the spoke 2 to the hub 3 by the stop surface is that the mounting of the spoke does not deform as in the case of welding, thereby impairing the assembly of the spoke to the hub.

In fig. 2, the first and second discs of the hub are provided with corresponding through holes through which bolts or the like are passed to clamp the first and second discs and the workpiece therebetween.

Fig. 3 shows a schematic view of the gas cleaning disc of fig. 2 after removal of the second disc 32 (or the first disc 31) of the hub. In fig. 3, on the first disc 31 (or the second disc 32), the spokes are fixed circumferentially by the fixing means 4. The fixing device comprises a plurality of fixing blocks, the fixing blocks are approximately in a fan shape, the fixing blocks are arranged along the circumferential direction, a groove is formed between every two adjacent fixing blocks, the cross sections of the grooves are approximately the same in shape and used for accommodating spokes; preferably there is a substantially interference fit between the slots and the spokes whereby no play is created between the fixing means and the spokes are not tightly secured to the hub and do not vibrate or rattle during use. If the engagement between the slots and the spokes is a clearance fit, this is convenient to install, but it must be ensured that the second disk (or the first disk) presses against the spokes to avoid vibration or wobble during rotation.

As shown in fig. 4, is a front view of the spoke. A section of the spoke connected with the hub is provided with a stop surface 11, and the stop surface 11 can be planar or curved; when the stop surface is planar, the stop surface is perpendicular to or at an angle to the centerline of the spoke.

The stop surface may also be curved, as shown in FIG. 5; fig. 5 is an enlarged view of a portion of the spoke of fig. 4. When the stopper surface 11 is a curved surface, it is preferably a cylindrical curved surface formed along a direction perpendicular to the paper surface according to a curve as shown in fig. 5, such a surface is easy to process, and when the stopper surface and the stopper receiving surface are mated, a stable stopper support mating surface can be formed, thereby reducing problems such as fluttering of spokes due to unstable mating during use of the gas purification disk.

As shown in FIG. 6, FIG. 6 shows the cross-sectional shape of the spoke as viewed along the A-A direction of FIG. 4. Fig. 8 is a schematic view of the use of the spokes. In fig. 8, the spokes are formed with a first surface 21 (not shown) and a second surface 22, the first surface 21 being a soot cleaning surface that collides with soot droplets or other particles when the gas cleaning disk rotates. Referring to fig. 6, the intersection of the first surface with the center line perpendicular to the spokes is a first intersection 201, which is a function of the first intersection; wherein the second surface forms a second intersection 202 with a center line perpendicular to the spokes.

The first and second intersecting lines may have different shapes, the first intersecting line being close to a streamlined shape for handling the gas flow; the second intersection is the back of the spoke and does not directly treat the air flow; the two have a large difference in shape.

The second intersection line may also be symmetrical to the first intersection line with respect to a line connecting the first corner line and the second intersection line. As shown in fig. 6, the spokes 11 are symmetrical with respect to a plane of symmetry that is parallel to the plane formed by the rotation of the center line of the spokes about the center line of the gas disk. The spokes may also be asymmetrical. The spokes are symmetrical relative to the symmetry plane, so that the spokes are more stable.

As shown in fig. 6, a first intersection 201 and a second intersection 202 intersect at both ends to form two intersections, and a line connecting the two intersections is parallel to the center line of the gas purification disk.

The functional curve of the first intersection of the spoke of the invention also has a projection formed by the intersection of the first segment and the second segment, the perpendicular distance of the intersection of the first segment and the second segment from the center line of the spoke on a plane perpendicular to the spoke being greater than the perpendicular distance of the other points on the first intersection from the center line of the spoke; the protrusions facilitate reducing the resistance experienced by the gas purification disk during rotation, thereby reducing the power and volume of the gas purification disk drive motor, and reducing the overall volume and overall cost of the apparatus in which the gas purification disk is used.

The first line segment and the second line segment can be straight line segments or line segments with curve shapes such as quadratic curves, cubic curves, involutes and the like or combination line segments thereof, and when the first intersection line transitions to the intersection point of the first line segment and the second line segment along the intersection point of the first intersection line and the second intersection line, the included angle of the tangent line of a point on the first intersection line relative to the symmetrical line of the cross section is changed; the shape of the first intersection line can form a shape similar to a streamline shape, thereby helping to reduce the resistance of the gas purifying disk during rotation.

The shape of the first line segment and the second line segment is different from the shape of the other parts of the first intersection line except the first line segment and the second line segment; the curvature of the first intersection line other than the first line segment and the second line segment is different from the curvature of the first line segment and the second line segment, and such curvature should be such that an angle of a tangent line to a point on the first intersection line with respect to a symmetrical line of the cross-section is changed when the first intersection line transitions to an intersection point of the first line segment and the second line segment along the intersection point with the second intersection line.

The shape of the first intersection line substantially presents a "convex" shape, such a shape enabling the rotating spokes to effectively reduce the rotation resistance and to reduce the wind resistance; the reduction of the rotation resistance reduces the energy consumed by the rotation of the spokes; the wind resistance reduces the energy consumed by the negative pressure fan. Compared with the spokes with rectangular sections, the rectangular spokes have large rotation resistance and particularly large wind resistance; although the equivalent 'impact' length of the rectangular spoke is longer, the higher the rotating speed of the rectangular spoke is, the larger the wind resistance is, the problems that a negative pressure fan is required to provide much higher negative pressure and the power of a motor driving the gas purification disc to rotate is larger are caused, and although the equivalent impact length is higher, the purification efficiency cannot be improved, so that the purification efficiency of the rectangular spoke is too low, and the spoke with the cross section shape is unacceptable compared with the spoke with the cross section shape provided by the invention.

The curved shape of the first intersection does not imply that the first intersection excludes the presence of straight segments. The first intersection is considered to be a curved shape as long as it is formed by connecting not only straight lines having the same slope.

The second intersection line can be a linear line, and can also be formed by connecting a curve section and a straight line section. As shown in fig. 5, the second intersection line comprises a plurality of line segments which are substantially represented such that the back of the spoke presents two recesses. There is a protrusion in the middle of the two recesses. The shape of the second intersection line enables air flow to the concave part at the back of the spoke in the operation process of the spoke, so that the wind resistance is reduced, the power requirement of the exhaust fan can be reduced under the same condition, and the whole function manufacturing cost and the power consumption of the purifying equipment are reduced. The second intersection may also be such that the back of the spoke presents a depression or depressions.

When the second intersection line is a straight line, the spoke processing becomes very simple because the shape of the second surface of the spoke is simpler, and the yield of the spoke is also improved to a great extent. The second intersecting line is parallel to the central line of the gas purification disk, and when the spokes treat the gas flow to be purified, the flow direction of the gas flow is more stable and reliable, and the wind resistance of the gas purification disk cannot be influenced.

The second intersection line is symmetrical with the midpoint no matter whether the second intersection line is a straight line or formed by connecting a plurality of straight line segments and/or a plurality of curve segments.

The second intersecting line can be symmetrical with the first intersecting line relative to the connecting line of the first angular line and the second intersecting line; in this case, the spoke can play the same purifying role in both forward rotation and reverse rotation.

The first intersection line, which is preferably shaped as a function of one or more curve segments, removes liquid droplets and solid particles by impingement with the gas stream. This shape may minimize the resistance of the spoke to the wind during rotation. In particular the shape of a curved segment of a continuous function that is substantially "convex" outward.

As shown in fig. 7, the dimension of the first intersection line and the second intersection line in the width direction is a, and the dimension of the first intersection line and the second intersection line in the thickness direction is b; the ratio of a to b is 1.2 to 4; the larger the ratio of a to b, the smaller the circumferential dimension taken up by the spokes on the hub with the same gas treatment surface; however, if the ratio of a to b is too large, the rigidity of the spokes is insufficient, bending is easy to occur, and the spokes are more likely to shake during operation to generate noise, so that a to b should be in a proper range; according to the research and experiment of the inventor, the optimal ratio of a to b is 2, and the values of a to b can also be 1.6, 1.8, 2.2, 2.4, 2.8, 3.2, 3.5 and 3.7. a may range from 0.5 to 10 mm, and specifically may range from 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 mm.

The spoke shape in fig. 7 exhibits a dimensional shape of approximately a ≈ 2b, enabling longer fume purification depth of the spokes with equal spoke mounting density; the first intersection line and the second intersection line shape of cooperation spoke, the spoke can be under the longer condition of the degree of depth of purification, and rotation resistance is littleer, windage is littleer.

Fig. 9 shows a schematic view in which the first disc 31 and the fixing means 4 are separable. In fig. 9, the fixing device 4 includes a plurality of fixing blocks 41 and a connection ring 42. The connecting ring 42 and the fixing blocks 41 may be made of metal or plastic. The connecting ring 42 and the fixing blocks 41 are structurally integrated, and can be obtained by machining or manufactured by metal die-casting or injection molding.

The first plate 31 of fig. 9, which is separable from the fixture 4, is typically first formed as a blank by die casting or forging, and then machined to form the detail parts, which are then machined to form the more precise first plate. The fixing means may be made by precision casting or injection moulding. If the fixing device 4 is made as an inseparable unit with the first disk, the detail of the fixing device 4 is machined, which results in higher costs. The first disc 31 and the fixing means 4 are separable, which means that the first disc 31 and the fixing means 4 can also be made of different materials, for example, the first disc is made of an aluminum alloy or a magnesium alloy, and the fixing means 4 is made of a polymer.

Referring to fig. 10, the first disc 31 and the fixing means 4 are inseparable. In this case, the first disc 31 is actually made from the same blank as the fixing means 4. The blank is made by casting and the first disc 31 and the details of the fixture 4 are machined out by machining. In this way, a relatively ideal first disc 31 and fixing means 4 can be obtained, without the problem of requiring assembly of the first disc 31 and fixing means 4. In this case, the fixing ring 41 of the fixing device 4 described above is practically unnecessary, since the fixing device does not need to connect the fixing block, which is integrally formed with the first disk, by the fixing ring.

Fig. 11 shows a schematic view of the first disc 31 in the case where the first disc and the fixing means 4 are separable. In fig. 11, the first disk 31 is provided with a rest surface 311, and the rest surface 311 in fig. 11 is cylindrical. The stop surface 311 may engage the spoke to fix the spoke in the axial direction. The catch surface 31 may also be a cylindrical surface, a circular table surface or a surface of revolution of a functional curve. The shape of bearing the shelves surface mainly depends on the shape of the shelves surface that ends of spoke, is provided with the shelves surface on the spoke, should bear the shelves surface need can with the spokes on the shelves surface mutually support to form stable cooperation relation, can effectually fix the spoke in radial direction.

The first disc 31 in fig. 11 also has a receiving groove 32; the receiving groove 32 is for receiving the coupling ring of the fixture 4. The connection ring 42 is accommodated in the accommodation groove 32; the connection ring functions to connect the fixing blocks, and at the same time, since the connection ring 42 is received in the receiving groove 32, the connection ring does not affect the fixing of the spokes. Furthermore, the receiving groove 32 has a positioning means, which is adapted to the positioning means of the connecting ring 42 in the receiving groove 32. During assembly, the first disk is first prevented upward by the portion with the stop surface 311, then the connecting ring is installed in the receiving groove 32, and then the spokes are installed between the fixing blocks.

Fig. 12 shows a schematic view of the fixture. The connection ring 42 and the fixing blocks 41 of fig. 12 are integrally provided to form a fixing device.

Fig. 13-14 show a schematic view of a part of the spoke 2 mounted on the first disc 31 and the fixing means 4. As can be seen in fig. 14, the stop surface 311 on the first disc 31 cooperates with the stop surface on the spoke, so as to fix the spoke 2 in the radial direction; the spokes 2 are placed between adjacent fixing blocks 41 of the fixing device 4, thereby fixing the spokes 2 in the circumferential direction. After the spokes 2 have been mounted between adjacent fixing blocks 41 of the fixing device 4, the second disc is mounted, the spokes and the fixing device being fixed between the first and second discs, so that the spokes are fixed in the axial direction.

Fig. 14 is a schematic (partial) view of the cooperating relationship of the spokes 2 and the first disc 31, after the fixing means 4 have been removed from the first disc 31. As can be seen from the figure, the stop surface of the spoke cooperates with the stop surface 311 of the first disc, thereby fixing the spoke 2 in the radial direction.

The assembly process of the hub of the invention when used for a gas purification disk is as follows: after placing first dish stably, assemble fixing device and first dish (if fixing device and first dish be integrative then directly place first dish and fixing device stably can), all place the spoke between fixing device's fixed block afterwards, the spoke has all been placed to the clearance that all fixed blocks formed, later with the second dish assemble first dish and fixing device on, will use fastening device such as bolt to fasten first dish (and fixing device), spoke, second dish together afterwards.

In the invention, the first disc, the second disc and the fixing device are all provided with rotation centers, and the rotation centers of the first disc, the second disc and the fixing device are superposed; the center of rotation of the bearing surface of the invention coincides with the center of rotation of the fixing device. After mounting the spokes to the hub of the present invention, the spokes will be able to rotate about the center of rotation of the first disk, second disk and fixture of the present invention.

Results of the experiment

To test the purification effect of the present invention, we performed experiments based on the following conditions:

the diameter of the gas purification disk is as follows: 30 cm; the outer diameter of the hub of the gas purification disc is 13 cm; the gas purification disk comprises the following components: 1300 rpm. Under the condition of no diffusion, the oil smoke generated by the oil smoke simulation generating device is processed by a purifying device provided with a gas purifying disc. The experimental time is 11 minutes, the oil smoke simulation generating device generates 2g of oil smoke per minute, and the oil smoke purifying device generates oil smoke gas containing 40g of pollutants in 10 minutes; the smoke purifying device works for 11 minutes in total. A non-woven fabric piece with the diameter of 10cm is fixedly arranged at the position 5cm behind the gas purification disk, the weight of the clean non-woven fabric is weighed before the test, and the weight of the non-woven fabric is weighed after the test. A decibel meter is arranged 20cm below the gas purification disk.

In the examples, spokes other than circular spokes were used having a ratio of a to b of 2.

The variables tested were gas flow rate, number of spokes and shape of the gas purification disk, and the test results were as follows:

the above formula for calculating the purification rate is as follows: reduction of contaminants/total amount of contaminants.

As can be seen from the above table, the gas purification disk using the spokes of the invention has high purification rate and good purification effect. The reason for this is that: removing liquid drops and solid particles in the gas by using rotating spokes, wherein the spokes are used for rotating and impacting heavier liquid or particles in the gas; during the impact, the spokes mainly play a role in impacting and the surface of the spokes facing to the rotating direction; for circular spokes, the first half of the surface of the spoke facing in the direction of rotation is the surface that primarily serves as the impact. For example, for a spoke diameter x, the effective impingement length along the diameter of the gas purification disk is x/2. The number of spokes provided for a given effective impact length is limited by the diameter of the hub of the gas purification disk, and given a hub diameter of d, the number of spokes must be less than π d/x. For example, in the case of a hub diameter of 13 cm and a spoke diameter of 2 mm, the limit value for the number of spokes is pi 130/2 ≈ 204, i.e. it is absolutely impossible to exceed 204 spokes, in fact 180 spokes are already the limit value. Once the hub diameter is determined, the upper limit of the number of spokes is determined, as is the gap between adjacent spokes, in which case at a certain gas flow rate a certain rotational speed of the gas cleaning disc is required, which rotational speed is sufficient to be able to hit all the gas flowing through the gap within a certain time. If the gas flow rate is large, then the rotational speed of the gas purification disk needs to be large, given the effective impingement length and adjacent spoke clearances. Although some problems can be solved by increasing the rotation speed, there are also the following problems: there is a limit to the increase of the rotation speed, which is limited by the rotation speed of the motor, and in addition, too high a rotation speed consumes excessive energy and generates excessive noise. Due to the limited rotating speed, a good purifying effect is difficult to obtain on certain occasions with serious pollution.

In the technical scheme provided by the invention, assuming that b is equal to x, a is equal to 2x, and the equivalent length of effective impact is x. At this time, the upper limit of the number of spokes is still a certain value less than π d/x. With the number of spokes unchanged, the effective impact length of the spokes of the present invention is doubled. Thus, the rotational speed of the gas purification disk can be reduced to about one-half of that of the circular spokes under a certain gas flow rate.

The reason why the purification rates of examples 1, 2 and 3 of the present invention were high in the experiment, and the purification rates of examples 4 to 8 were not equal but significantly lower than those of examples 1 to 3 of the present invention was explained above.

In addition, since the spokes are circular, the probability of elastic deformation in all directions is high, and therefore, particles or liquid drops in the oil smoke can irregularly shake after hitting the spokes, and rub against the air flow under the condition of high-speed rotation, so that great noise is generated.

After the spoke structure is adopted, the purification disc can adopt fewer spokes and lower rotating speed on the whole, higher purification efficiency can be obtained, and noise is effectively reduced.

The gas purification disk effectively reduces the overall installation cost of the gas purification disk, reduces the overall cost of purification equipment provided with the gas purification disk, and improves the purification efficiency.

The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments and is not intended to limit the practice of the invention to these embodiments. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (10)

1. A gas purification disk comprising a first disk provided with holes for connection to a rotary drive, a second disk and spokes, the axis of rotation of the first disk coinciding with the axis of rotation of the second disk; the first disk and the second disk are detachably connected together; wherein the first disc is provided with an annular stop surface, the rotational axis of which coincides with the rotational axis of the first disc; the spokes have stop surfaces thereon.

2. The gas purification disk of claim 1, wherein the spokes have the same cross-sectional shape along the center line of the spoke, and the spoke is formed with a first surface and a second surface, wherein the first surface forms a first intersection with a plane perpendicular to the center line of the spoke, the first intersection being a function curve shape; wherein an intersection of the second surface with a plane perpendicular to the centerline of the spoke is a second intersection.

3. The gas purification disk of claim 2 wherein the first intersection line has a protrusion formed by the intersection of a first curved segment and a second curved segment, the intersection of the first curved segment and the second curved segment being at a greater vertical distance from the centerline of the spoke in a plane perpendicular to the spoke than other points on the first intersection line.

4. The gas purification disk of claim 1, wherein the bearing surface is a cylindrical surface, a circular table surface, or a surface of revolution of a functional curve; wherein the stop surface corresponds to the shape of the stop surface.

5. The gas purification disk as claimed in claim 1, further comprising a plurality of fixing blocks arranged along a circumference of the hub, the fixing blocks forming a groove therebetween; spokes are mounted in the grooves.

6. A gas cleaning disk according to claim 3 in which the ratio of the thickness dimension to the width dimension of the spokes is from 1:1.2 to 4, preferably 1: 2; wherein the slot is dimensioned to correspond to the dimensions of the spokes.

7. The gas purification disk of claim 5, wherein the plurality of fixing blocks are integrally formed with the first disk or the plurality of fixing blocks are fixed by a fixing ring.

8. The gas purification disk of claim 3, wherein the spokes and the mounting block form an interference fit.

9. The gas purification disk of claim 5, wherein the retaining surface, the spokes, and the fastening means are disposed between the first disk and the second disk, and the first disk and the second disk are fastened by the fastening means.

10. A gas cleaning device comprising a drive means and a gas cleaning disc according to claims 1-9.

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