TW423993B - High efficiency impeller assembly and associated method - Google Patents

Abstract

An impeller assembly includes a hub member having a central portion adapted for connection to a drive shaft. A plurality of stub blades extend outwardly from the central portion, each stub blade having an arcuate portion at least at its outer end and the arcuate portion of each stub blade including at least one opening thereon. A corresponding plurality of extension blades each have an arcuate portion for mating with the arcuate portion of a respective one of the stub blades. The arcuate portion of each extension blade includes at least first and second openings thereon, each of the first and second openings selectively alignable with the opening of the arcuate portion of the respective mating stub blade such that alignment of the first opening with the opening of the arcuate portion of the respective mating stub blade establishes a first selectable pitch angle and alignment of the second opening with the opening of the arcuate portion of the respective mating stub blade establishes a second selectable pitch angle. Thus, rotating the arcuate portion of the extension blade relative to the arcuate portion of the stub blade enables selection of the pitch angle. Other techiques for providing pitch angle selection and adjustment are shown. Further, the extension blades are preferably angled in the pumping direction to aid in maintaining axial flow.

Description

423993 V. Description of the invention (l) Background of the invention The mixing and agitation rates move the total liquid of the impeller and the liquid tank straight; ^ The middle and high-efficiency part has a significant internal absorption direction due to the defect in the far center, and the direction is usually liquid and Solids are suspended in the liquid. The center of the moving blade of the solid suspended solids extends from the bottom to the bottom. The impeller has an important characteristic. Above the bottom of the storage tank, solids accumulate in the suction flow or stun out before solids accumulate. Because of good axial flow. (Text) The term "defines fluid away downwards, but it is possible for the present invention to refer to a device for mixing people and floats," in particular & the mixing, stirring and agitating wheel assembly is usually located in a cylinder. Chu Han is connected for rotation. This should be because this kind of moving impeller maintains an axial flow in the direction of the bottom of the liquid storage tank due to the divergent flow of liquid at the bottom of the liquid storage tank. However, I have always wanted to pump in the direction of the pumping Other characteristics that need to be taken into account in the grid-efficient moving impeller assembly include blade chord, blade camber, and blade pitch angle, all of which can follow the blade from one end to the other. Length variation. The blade chord line is a straight line between the leading and trailing edges of the blade. The blade curvature is (1) the maximum distance between the chord line and a line defining the average blade thickness or the median value of the blade thickness and (2) the length of the blade chord line. The ratio of the blade pitch angle is the angle between the chord line and the —horizontal line, where the horizontal line lies in a plane that is perpendicular to the axis of the active axis. Regarding the blade pitch angle, this characteristic is a particularly important structural characteristic that varies depending on the application parameters These application parameters include the viscosity of the liquid to be stirred, the type of solid suspended in the liquid, the depth of the mixing tank, and the width or radius of the mixing tank. Rate and subsequent

Page 6 423993 V. Description of the invention (2). 1 ~~ " ~ ---- 1 The flow can be changed by changing the elevation angle. Knowing the skillThe moving impeller assembly usually includes a preset non-adjustable blade pitch angle or requires complicated mechanisms or manufacturing operations to adjust the blade pitch angle. Therefore, Putt will propose a high-efficiency moving impeller with more than one selectable blade pitch angle Assembly. I also want to propose a simple method to establish the pitch angle of the blade of the moving Hualunye #. In addition, I also want to propose a high-efficiency moving impeller assembly designed to hold a good axial flow in the suction sentence. SUMMARY OF THE INVENTION This month is a moving impeller assembly designed to allow selection of blade pitch angles depending on the particular application. In a preferred embodiment of the present invention, the movable impeller assembly includes a wheel member, and the hub member has a central portion f connected to the driving shaft. A plurality of rotor blades extend outward from the central portion, and each rotor blade has an arc-shaped portion at least at its outer end, and each of the rotor-shaped blades includes at least one opening. Correspondingly, each of the plurality of extended females has an arc-shaped portion to distribute D with the arc-shaped portion of the corresponding shaft blade. The arcuate portion of each extension blade includes at least first and second openings. Each of the first and second openings can be selectively aligned with the corresponding mating shaft leaves. ^ Minute openings, so that the first opening Align with the corresponding code: Establish a first selectable pitch angle with the alignment of the openings, and set == /, corresponding to the alignment of the arc-shaped openings of the rotating blades to establish a pitch angle of 圩 ff. Because of ⑶, the arc-shaped part of the extension blade is relative to the rotating shaft blade; the rotation of the solitary cantilever can select the blade pitch angle. 〃 ^: Mingzhi :: In a preferred embodiment, a movable impeller assembly includes-a wheel taking member, the wheel member includes a central portion and a plurality of arc-shaped rotor blades

Page 7 4 23 993 V. Description of the invention (3 ^ a — 'piece, the central portion is adapted to be connected to a driving shaft, the arcuate shaft blades f extend outwardly from the central portion. A plurality of arcuate extension leaves are provided' Each extension blade is placed adjacent to a corresponding solitary shaft blade. A leading edge of each extension blade is swept forward from its inner end to an outer end. In addition, each arc-shaped shaft blade is drawn in the direction of suction from the vicinity of the hub member. One point is tilted to one of its outer ends, so, two = when it cooperates with the extended leaf moon, it is also tilted from an inner end in the suction direction :::; = make the leading edge of each extended leaf moon-the outer end is more than the leading edge The ice enters the suction direction to maintain the desired axial angle in the suction direction = of:-the point of view is to propose-a way to establish a moving impeller blade pitching US shape: ^ includes providing a wheel planting connection structure, the wheel planting connection structure Matching%: Wheel: Month, with f-fitting arc shape to adjust the connection structure with the hub. The U-hub connection,-° configuration, and the arc-shaped position of the jujube blade are adjusted relative to the arc-shaped hub bait W. 疋 在Relative to the arc-shaped 'post-movement The pitch angle of the wheel is compared to the arc-shaped position of the connecting structure, and the other is established. In the viewpoint, a method of moving a single-piece sheet-like efficient moving jujube blade is proposed. The sheet-like material is defined to have- The 3 methods involved: cutting the sheet-like material shape, wherein the leading edge is one above ;: the end, the 1 edge, and the -back edge of the -the second part of the phase: two is substantially perpendicular to the -end, the front deformation It is arc-shaped, and its arc then makes a central axis of the arc of the flat material after cutting roughly parallel to the

0: \ 6 (M〇〇30.PTD page 8 the trailing edge and the first side =--points incline and tend to the trailing edge, and ^ 23993 V. Description of the invention ⑷:-knife β another option, blade It can be cut only after passing through the tear house. Η Therefore, a subject of the present invention is to propose a kind of moving impeller assembly, which has: adjusting the blade pitch angle so that the assembly can be used in a variety of different applications; a kind of moving impeller assembly 'It is designed to easily select the pitch angle of the operating blade ;: A moving impeller assembly' It is designed to maintain a good axial flow in the suction direction; a simple method to establish the operating pitch angle of the moving blade; and a sheet material A simple method for forming a high-efficiency moving impeller blade. Brief description of the drawings FIG. 1 is a top plan view of a preferred embodiment of a moving impeller assembly according to the present invention; FIG. 2 is a side elevation view of the moving impeller assembly of FIG. 1; 3 is an enlarged end view of a rotating blade; FIG. 4 is a sectional view taken along line 4-4 in FIG. 1; FIG. 5 is a sectional view taken along line 5_5 in FIG. I; 6 is a sectional view obtained; and FIG. 7 is a sectional view of a moving impeller blade according to the present invention. A top plan view D 'of a material-like material, a detailed description with reference to the drawings' FIGS. 1 and 2 depict a 12-blade view and a side view of a moving impeller assembly 10 according to an embodiment of the present invention, the moving impeller assembly including a hub Components The wheel has a spare opening—4, which opens through Lianji— + 1 ^ and the main—active shaft 16 to rotate at the same time as the active shaft 16. The hub member 12 includes $ shaft 16 and can be used. Any appropriate connection type plough, in which the dagger is connected but not limited to: the use of key groove type arrangements, bolts or other bindings,

Page 9 ^^ 3993 V. Description of the invention (5) and lock or clip. Threaded here. The three-rotor blades are used in conjunction with the round member 12-reinforcing ribs 21 to increase the blade 18 and extend the blade 20 wheel assembly. In addition, although it is integrally added to the hub member 12 during the manufacturing operation. The moving impeller assembly 10 will be placed on the top of the storage tank containing the liquid to move in the center of the storage tank to allow recirculation to occur. The moving impeller assembly 10 will go down the flow direction. As mentioned above, the rotor blades vary with parameters. The moving blade selects and / or adjusts the bottom surface of the blade intermediate shaft blade I 8. The top surface of the blade 20 and the bottom surface 18 of the blade are long and combined with the matching arc shape (singular fixed also confirms that the drive shaft 16 and the hub member 12 shaft Yechuan freewheel There are two radial extensions of the comparative member 12: large; the extension leaf 20 is connected to the wheel and the member 12 rotates at the same time. The shaft blades can include-or multiple strengths. Although the figure shows three sets of matching shaft blades, However, it is also possible to provide a moving leaf with a number of other leaf months. The rotating shaft ^ 18 is preferably cast with the wheel assembly. But it can also be formed separately. 8 and then attached; use :: The diameter of the impeller assembly and the solid tank storage tank of the ocean suspended solid is near or near the bottom. The impeller assembly 10 rotates through the shaft 16 to generate f suction directions (downward or upward) respectively. The radial outer area of the groove. As shown in FIG. 1, the clock rotation produces the direction of flow relative to the configuration shown in FIG. 2. This flow direction is the same in this specification. ^ The appropriate blade pitch angle of the wheel blade assembly depends on the various wheel assemblies. 10 Advantageously assist depending on the needs of a given application ^ ίAngle Specifically, as shown in FIG. 2, each = surface is combined with an arc-like shape. Similarly, each-extended joint-fitting arc-like shape is matched with the corresponding mating shaft blade. Preferably, the extension blade 2 0 Along this whole, the shape is defined as " single fixed rolling half ^ roll radius) ". Because the rotating shaft blade 18 and the extension r_d23l ^ 5. Description of the invention (6) The relative positions of the two extension blades 20 are flush with each other and fixed or fitted at the pitch angle. By placing the blade pitch axis blades 18 on top of 3 blades of the rotating shaft; this kind of structure is released and the arc-shaped cooperation is established to establish a variety of blade hub members 12 and the rotor is equipped with the required blades, each relative position can be reached immediately and each extension can be extended. The fixing operation may require one or more extension blades 20, such as 30 holes. Predestination here: set and defer the moving fan assembly in the correct position, 30 positions, and the arc-shaped part of the extended fan 20 is matched, and each pair of blades can fit together in a plurality of places. For example, Figure 2 shows the relative position of the blades together. The position shown in the figure results in a smaller position as shown by arrow 22. Turning the extended blade 20 to the right can be adjusted to a larger pitch angle as desired. Preferably, the surface of the turning portion is flat and parallel to all lines, and the tangent line is taken from the center of the corresponding clearance hole as shown in the k-end view. This top surface engages the stress concentration of the threaded tie. The model advantageously forms a moving impeller assembly, which can be pitched depending on the application. This system facilitates prefabricated axle blades 18 and prefabricated extension blades 20 in a manufacturing environment. The consumer can order the assembly of the pitch angle, and after knowing the pitch angle of the desired blade, the extension blade 20 is placed adjacent to the corresponding shaft blade u and the pitch angle of the desired blade is adjusted to complete the final manufacturing operation. The blade 2 D is then fixed to its corresponding mating shaft blade 18. This kind of use of bolts 24 and nuts 26 as shown in FIG. 2 is used. In this case, a hole 28 penetrates the shaft blade 18 and one or more holes 30 penetrates the bolt 24 through the aligned shaft blade hole 28 In the case of extension leaves, the 'rotor blade holes 28' will be positioned on the extension piece 20 during prefabrication and no holes will be formed during prefabrication. After selecting the desired blade pitch angle for a given hole, holes 30 will be formed inside the extended blade »In this regard, we will want to establish a known relationship between the pitch angle of the blades of the hole. For example, the distance between the hole and the-edge (such as the edge portion 40) will correspond to its

Page 11 V. Description of the invention (7) The pitch angle of the blade formed can be established-a chart of appropriate hole distances ... or a quick look-up table and use this table when selecting the desired blade pitch angle, which penetrates the holes that extend the blade The location is found from the chart or cheat sheet. It should also be understood here that the extension blade 20 can be fixed to the rotor blade > J18 by other devices or techniques including fusion or using other types of binding members. It can also constitute an adjustable movable impeller assembly including an arc-shaped matching appearance. In this regard, as shown in FIG. 1, each turning Korean blade 18 has four holes 28 for connecting to the extending blade 20. In an adjustable assembly, the 'extending blade 20' has six or more holes 30 as shown in Fig. 6, divided into at least two groups of 32 and 34 each having three holes for connection to the shaft blade 18. Using a group 32 closer to the leading edge 36 to connect to the rotor blade 18 will cause a larger blade pitch angle, and using a group 34 will result in a smaller blade pitch angle. The resulting moving impeller assembly provides in-situ adjustment of the blade pitch angle when necessary to switch the moving impeller assembly from one use to another. It should be understood here that the number of holes used to connect the extension blade 20 to the shaft blade may be different, so the present invention is not limited to using a specific number of holes for this connection. More holes 3 0 help the leaves n Holes 2 8 S provide a relaxation movement on the integrity β and the bolts 24 are on instead of extending. For example, when only one hole is required for connection, the pitch angle of the slice can be selectively aligned with a rotating shaft and blade hole 20. Generally speaking, if the rotating shaft ', the extension blade 20 will have at least ηΗ. It should also be understood that in some applications, the extension blade 20 can be adjusted by assisting the blade pitch angle with a long hole or slit. But it is not necessary. Similarly, additional holes or slits may be placed on the blades 20. All of these configurations are provided with extension leaves, 18 holes in the blades, 3 0 to extend the shaft, remove the screws, and properly install two or more pieces on the shaft.

Page 12 423993 V. Description of the invention (8) One ^-The extension blade 20 is fixed at multiple positions relative to the cypress blade 18. The arc shape of the extension blade at the position matching with the shaft leaf 18 also increases the stiffness of the extension blade by ^ 20, and the number of wedges in the section of the extension blade 20 is greater than that of the blade with a flat connecting portion. In some cases, this increased stiffness can help to significantly reduce the thickness of the extension blade, thereby reducing the weight of the extension blade by 50 percent or more. As mentioned previously, each extension blade 20 preferably arches along its length from its inner side closer to the wheel comparison member to its outer end or wing tip. The cross-sections of Figures 4 to 6 depict arcs that are maintained along the entire extended blade length. Extending the blade 2 〇 Another — characteristics are the edge-to-edge width of the blade and the blade chord length at the outer end or wing tip of the extending blade 20 is smaller than the inner end of the extending blade 20 close to the stern member 12 A trailing edge 38 is provided, which includes a first portion ^ and a second portion 42 ′, wherein the second portion 42 extends substantially forward (in a desired direction of rotation) toward the leading edge 38. The extended leaf moon 20 according to the present invention can be made from a piece of suitable material 44 (Fig. 7). For example, the special material selected is mainly based on the strength and durability of the moving impeller assembly. The sheet-like material 44 is cut along the dashed line to form a large blade shape. It is noted here that the cut along the dashed line 46 provides a preferred blade shape / wherein the leading edge 36 is swept slightly forward (in the direction of expected rotation) and thus forms an obtuse angle (0) with the inner end. The cutting step can be performed with a laser cutting device ^ a waterjet cutting device, for example, but it should be understood that other conventional cutting techniques may also be used. Then the sheet material is cut into an arc shape after cutting, wherein the central axis of the arc (that is, the central axis of an imaginary cylinder along which the arc extends, as shown by its 6 midpoint 48) is preferably parallel to the trailing edge 38 The first part 40 extends. When / is connected as a part of a moving impeller assembly, define the extension blade

^ 23993 ^ V. Description of the invention (9) The line of the central axis is preferably the same as that of the moving impeller assembly: the rotating air core extends radially outward and extends along a line along the top surface of the extended blade (such as 圊 1) The dashed lines shown 50) are parallel. In other words, the extension blade is not twisted relative to the center of rotation of the rotor Γ wheel. The orbital forming step may be performed using a rolling technique, a multiple 'parallel bending technique, or other conventional techniques. The desired holes 30 are then formed as previously described. Alternatively, the required holes can be formed before rolling or cutting, and cutting can be performed after the rolling step. The geometry of the resulting extension blade 20 due to its geometry includes the camber, which increases from the outer wing tip to at least the intersection of the edge portions 40 and 42. The curvature at the inner end of the extension blade 20 is also greater than the ridge at the outer end or at the wing tip. The increased degree of each extension blade 20 in cooperation with the shaft blade 18 is beneficial to increase the section modulus of the extension blade at the maximum stress concentration plane. Referring again to FIG. 2, in order to maintain a good axial flow in the suction direction with minimal divergence, the shaft blade 18 protruding from the hub member 2 is preferably inclined slightly downward (drawing direction in the figure), so that the extension blade 2 0 also tilts slightly downwards when attached to it =-this inward tilt of the suction direction is to some embodiments of the present invention. These embodiments because the leading edge 36 swept forward causes the leading edge 36 to be positioned at the wing tip. The hub member near the inner end upstream of the leading edge 36 (relative to the pumping direction) causes a tendency to generate a divergent flow rather than a good flow in the suction direction. With the better tilting of the rotating shaft blades 18 in the suction direction, the leading edge 3 6 at the tip is maintained slightly downstream of the leading edge 3 6 near the inner end (relative to the suction side a and the direction &) and Presents good axial flow. Within the forest in the downstream suction direction oblique angle #. In the embodiment, it is preferable to set the inclination angle between 1 degree and 10 degrees. What is important is that the inclination of the extension blade in the suction direction is not required.

Page 14 V. Description of the invention (10) The bending of the blade can be achieved, thereby maintaining the dimension along the entire length of the blade: Hold high_blade strength 6 Although the assembly form described herein constitutes a preferred embodiment of the present invention, here It should be understood that the present invention is not limited to this precise assembly form, and changes may be made without departing from the scope of the invention.

Page 15

Claims (1)

423993 VI. Application for patent Fan Yuan ~~-1. A movable impeller assembly (which includes:-a hub) which provides a selectable blade pitch angle, which includes a central portion adapted to be connected to a driving shaft; The central part extends outwards, the shaft blade j = has a 1-shaped portion H at the outer end of the blade-the arc shape of the blade includes at least one opening; the corresponding plurality of extension blades H extend the blade with an arc portion corresponding to the shaft blade, MT Including ig ^ # The arcuate portion of each extended piece includes to / first and second openings, each first and the material of the material of the system W are partly; I choose the shaft blade , The first opening and the corresponding mating surface of the blade with the curved portion of the blade as an opening read a second opening Π and the corresponding mating shaft septum P to select the pitch angle 'the-the second can choose the pitch angle. The alignment of the arc-shaped part opening ° 2. If the application of the scope of the patent application] the moving firefly is only posted but eighty „^ indicates the title“ • heart attack ”where the opening of an arc-shaped trowel of a mother axis contains a A through hole, and the first and second openings include a through hole; 1 _Ju piece where the moving impeller assembly further includes a plurality of tie pieces, such as the alignment of the rotating shaft blades and extension blades, and the penetrating holes of the β-pieces. 3. If the moving impeller of the patent application item 2 includes a screw bolt X, the moving impeller assembly, middle, and other systems-used to connect with a bolt. Multiple screws, each nut in each shaft, and each shaft blade penetrates the hole to reduce the cause of a 4. Such as The arc-shaped part of the rotor blade of the rotor blade of the patent application item 2 is located on one of the rotor blades. The opposite side of one of the upper pieces includes a flat surface part surrounding the O: \ 60 \ 6003aPTO Page 16 4 2 3 9 9-: 6. Scope of patent application Stress concentration caused by the respective binding parts. Every 5y, the impeller assembly as described in item 1 of the scope of the patent application, wherein each-extending certain piece is arched along its entire length so as to include a single fixed rolling radius. 6 If the moving impeller assembly of item 5 of the patent application scope, wherein each-extension = of-the trailing edge includes 1-part, $ the-part is roughly parallel to the arc-shaped extension blade central line extension, the armband y-E — In 丨 Knife / mouth 5¾ Extend ▼ The length of the tea piece extends from the inner end of one of the extension blades to a middle point. 7. The moving impeller assembly according to item 6 of the scope of patent application, wherein the trailing edge of each extending piece further includes a second portion, the second portion is inclined relative to the first portion and faces a leading edge of the extending blade. Extend forward. ^ 8. The moving impeller assembly according to item 5 of the patent application, wherein a leading edge of each extended blade is swept forward from an inner end to an outer end. β 9. The moving impeller assembly according to item 5 of the scope of patent application, in which each rotating shaft blade is approaching the hub member in a suction direction-the point is inclined to an outer end 'so that it cooperates with the extension blade when it is connected to it Also in the suction direction, it is inclined from an inner end to an outer end β! 〇.-A kind of movable impeller provided with a selectable blade pitch angle, which comprises:, ~ a hub member including a central portion suitable for connection To a corresponding plurality of shaft blades, which extend outward from the central portion, the shaft blades have at least an arcuate portion at their outer ends; a plurality of extension blades, each of which has an arcuate portion to cooperate with the arcuate portion of the blade ; Driving shaft; Each extension blade of each rotary shaft and the corresponding mating rotary shaft blade are covered with O: \ 50 \ 60030.PTD Page 17 423993, VI. Patent Application ^^ " a '' a ~, the extension member is fixed at a first relative position relative to the corresponding mating shaft, and the device is fixed with The extension member is fixed at two positions, such as # 丄 &%, relative to the fixed extension of the arc-shaped portion of the corresponding mating shaft blade: # 子 Extending the blade and corresponding mating shaft blade Μ extension member at _ β βd, the first relative position is relative to the corresponding mating shaft blade-the second 疋 establishes a first selectable pitch angle, and the extension member is fixed: j pair of positions relative to the corresponding With the arc-shaped part of the rotating pump blade fixed, Ί the second choice of pitch angle. ί 1 · As for the moving impeller assembly of No. 10 of the patent scope of Qing Dynasty, each extension end of which is arched toward the two kings, and the leading edge of each extension blade is approaching from the inside. Recognize that the f-end swept forward and that each of the blades of the rotating shaft tilted toward the outer end at one point with Long Zai at a point in the direction of the pumping, so that it cooperates with the extending blade obliquely. / 、 When it is connected, the blades are also inclined in the suction direction from an inner end to an outer end. The moving impeller assembly of the 11th patent scope of the patent application, wherein each of the extensions includes a first- The portion 'the first portion extends substantially parallel to the center of the extension of the arc-shaped extension blade' and the first portion extends from the inner end of one of the extension blades to an intermediate point along the length of each piece, and the extension blade is expected to be The trailing edge further includes a second portion which is jb-T > 7Γ ^. I 34 minutes inclined and extends forward toward the leading edge of the extension blade. Including, · A method for establishing a working pitch angle for the moving impeller blades, including the seven-wheel hub connection structure, which has an arc shape; Page 18 VI. The scope of the patent application provides a structural fit with a 1-fox shape; ', I piece with .. and the hub. Select the connection, one of the impeller blades is required to work and pitch the moving impeller blades next to each other , Relative to the arc-shaped valley connection structure = structure: set; set; and the arc-shaped position of the moving tea wheel blade of Yuetang is fixed to the arc-shaped position relative to the arc-shaped position to establish the desired operation pitch angle β _Comparative I structure-14. If the method of the patent application No. 丨 3, the multiplex structure includes at least one hole, and the arc-shaped wheel valley in the moving blade of the moving blade is connected with the adjusting step, and the adjusting step includes the moving blade of the moving blade Holes should be =:-holes, holes. The unloading, and. ° pieces pass through these alignments 1 5. As in step 3 of the scope of patent application: 17 Ran Li includes the following steps to provide at least one hole in the arc-shaped hub connection structure; An arc-predetermined relationship from an edge of the moving impeller; the distance between the distances is established after selecting the desired operation pitch angle and the established predetermined relationship corresponds to an arc-shaped distance of the desired operation pitch angle; and A hole is formed in the moving impeller blade at the predetermined arc-shaped distance. The step includes: connecting the moving impeller blade hole with the arc-shaped wheel. The fixing step includes passing a detachable tie through the alignment. hole. Page 19 6'Scope of Patent Application '-16. The method according to Item 13 of Patent Application' wherein the scale fixing step includes welding the extension blade to the arc-shaped hub connection structure. 17. —A method for establishing a working pitch angle for a moving impeller blade, comprising: providing a hub connection structure having an arc shape; providing a moving impeller blade with a matching arc shape in a plurality of positions with squared squareness Placed adjacent to the hub connection structure; $, Select the desired pitch angle of one of the rotor blades; Place the rotor blade at an arc-shaped hub connection structure at one of the multiple positions, where the specific position corresponds to the industry Elevation angle; and% selected to fix the moving impeller blade at the specific position relative to the arc-shaped hub connection structure. 18. —A high-efficiency moving impeller assembly comprising: a hub member including a central portion adapted to be connected to an active plural arc-shaped rotating shaft blade month extending outward from the central portion. A plurality of arc-shaped extending blade blades adjoin _: Corresponding to the arc-shaped rotating tea leaf placement, each extension blade has a single-fixed rolling radius; of which-the leading edge of each-extending blade is swept forward from the inner end to the outer end; and each of- The shape of the blade is inclined to an outer end from the point of approaching the round member, so that when it cooperates with the extension bean, it is also inclined from the inner end to the outer end in the suction direction, causing the leading edge of the blade to extend. An outer end is positioned downstream of an inner end of the leading edge with respect to the suction direction * O: \ 6 (M0030.PTD Page 20.423993 VI. Application for Patent Scope 1 9. For the moving impeller assembly with the scope of patent application No. 18, one of the trailing edges of each extended leaf month includes a first part, The first part extends substantially parallel to a line defining the central axis of the arc-shaped extension leaf X, the first part extends from an inner end of the extension leaf to an intermediate point along the length of the extension leaf> 1, and each extension leaf The trailing edge further includes a second portion, which is inclined relative to the first portion and extends forward from the intermediate point toward the leading edge of the extending blade. 2 0. A kind of high-efficiency motion composed of a single piece of sheet material Impeller blade) method comprising cutting the sheet material to define a shape having a first edge and a trailing edge, one of the leading edge being a first end and one of the leading edge being a second part opposite The trailing edge, and the intersection of the trailing edge and the first portion will deform the sheet material into an arc shape; wherein the arc shape of the sheet material after cutting and deforming is parallel to the first portion of the leading edge. 2 1. The method according to item 20 of the scope of patent application is performed by laser. 22. Method 1 of scope 20 of the patent application is performed with a water jet. 2 3. The method as claimed in the scope of patent application No. 20 > Step: Near the first end of the sheet material after cutting 24. The method as claimed in the scope of patent application No. 20, The front part is inclined substantially perpendicular to the first part and tends to form an obtuse angle; a central axis of the shape is roughly in which the cutting step is advantageous, wherein the cutting step is advantageous in that it includes the following steps to form a plurality of holes. The deformation step first Page 21 4 2 λ 9 9 3 VI. Application scope of patent