Assembly type logarithmic spiral impeller

Abstract

The utility model provides an assembly type logarithmic spiral impeller which comprises a main shaft and a split type impeller body provided with the main shaft, and the split type impeller body comprises a plurality of groups of impeller unit layers which are assembled and stacked. Each impeller unit layer comprises a plurality of spliced blade blocks, the blade blocks are arranged on the main shaft in a surrounding mode, the peripheral side wall of each blade block is provided with two half flow guide faces, the two half flow guide faces intersect on the sides, away from the main shaft, of the two half flow guide faces, and the two half flow guide faces of the adjacent blade blocks form a complete flow guide face. The lower edge of the side edge of each semi-flow-guiding face is provided with a logarithmic spiral line segment, and the logarithmic spiral line segment on the lower edge of the side edge of each semi-flow-guiding face is rotationally and upwards stretched around the main shaft to form the semi-flow-guiding face. And the cover plates are detachably connected to the two ends of the split impeller, and the cover plates are detachably connected with the main shaft. The impeller is designed and manufactured in a split mode, the machining cost, the machining difficulty and the installation and maintenance difficulty of impeller manufacturing are reduced by adopting a modular and assembly type structure, and later installation and maintenance are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power collection devices, and in particular relates to an assembled logarithmic spiral impeller. Background Art

[0002] In today's society, as the demand for renewable energy continues to grow, wind energy as a clean and renewable energy source has attracted the attention of experts and scholars at home and abroad. However, despite the huge potential of wind energy, traditional impeller technology has a series of problems in its utilization process, which limits its further development and utilization. These problems mainly include the challenges of large size of traditional impellers, high installation and enclosure costs, and low power generation efficiency at low wind speeds.

[0003] First, traditional impellers are usually large in size, which brings great challenges to installation and transportation. Large impellers require special equipment to carry, and the installation process consumes a lot of manpower and material resources, increasing the cost and complexity of the project. In addition, due to the large size of the impeller, the required enclosure facilities and support structures are also relatively complex, increasing the investment and operating costs of the project.

[0004] Secondly, the power generation efficiency of traditional impellers is low at low wind speeds, which results in a large amount of wind energy being unable to be effectively converted into electrical energy. Especially when the wind speed is lower than 5m / s, it is difficult for traditional impellers to be directly driven to rotate, and the power generation efficiency is greatly reduced. This not only wastes precious natural resources, but also limits the utilization efficiency of wind energy, affecting the promotion and application of renewable energy.

[0005] In view of this, it is very meaningful to propose an assembled logarithmic spiral impeller. Utility Model Content

[0006] In order to solve the problems of large impeller size, high processing cost, and difficult installation and maintenance in existing wind collection devices, the utility model provides an assembled logarithmic spiral impeller. The logarithmic spiral impeller has high power generation efficiency and can store gas and generate stable power at low wind speeds. This provides new ideas and technical means for solving the power generation problem under low wind speed conditions, so as to solve the above-mentioned technical defects.

[0007] The utility model proposes an assembled logarithmic spiral impeller, comprising a main shaft and a split impeller arranged on the main shaft, the split impeller comprising a plurality of groups of impeller unit layers assembled and stacked; each group of the impeller unit layers comprises a plurality of spliced ​​blade blocks, the blade blocks are arranged around the main shaft, the peripheral side walls of the blade blocks are arranged as two semi-guide surfaces, and the two semi-guide surfaces intersect on a side away from the main shaft, and the two semi-guide surfaces of adjacent blade blocks form a complete guide surface; the lower edge of the side edge of each semi-guide surface is arranged as a logarithmic spiral segment, and the semi-guide surface is formed by the logarithmic spiral segment on the lower edge of the side edge thereof rotating upward around the main shaft, and the lead angle of the edge of the semi-guide surface on a side away from the main shaft is set to 50°~60°; and also comprises a cover plate, the cover plate is detachably connected to the two ends of the split impeller, and the cover plate is detachably connected to the main shaft. By designing and manufacturing the impeller in a split manner and adopting a modular and assembled structure, the processing cost, processing difficulty, and installation and maintenance difficulty of the impeller manufacturing are reduced, which facilitates the subsequent installation and maintenance and helps to reduce the processing cost.

[0008] Preferably, it further comprises a positioning collar, the impeller unit layer is provided with an annular groove, the annular groove is arranged around the main shaft, the positioning collar is arranged in the annular groove, the height of the positioning collar is greater than the depth of the annular groove, and adjacent impeller unit layers are positioned and installed through the annular groove and the positioning collar. The cooperation of the positioning collar and the annular groove facilitates the positioning and installation of the impeller unit layer.

[0009] Further preferably, the plurality of blade blocks on each group of the impeller unit layers are arranged to be detachably connected, and the blade blocks are fixedly installed by the cooperation of the annular groove and the positioning collar. The impeller unit layer is assembled by the blade blocks, and the blade blocks are fixedly installed by the cooperation of the annular groove and the positioning collar, which further reduces the difficulty of installation.

[0010] Preferably, the guide surface includes a first half guide surface and a second half guide surface, and two adjacent first half guide surfaces and second half guide surfaces are spliced ​​with each other. The guide surface spliced ​​by the half guide surfaces designed by logarithmic spiral segments can change the phenomenon of single-action of airflow in traditional blade design, improve the efficiency of the impeller, and achieve efficient use of wind energy.

[0011] Further preferably, the blade block is provided with an abutment strip, which is extended along one side edge or both sides edge of the first semi-guiding surface and the second semi-guiding surface, and the width of the abutment strip is 1 / 10 to 1 / 5 of the farthest distance between the first semi-guiding surface and the second semi-guiding surface. The design of the abutment strip can increase the abutment area between adjacent blade blocks in the axial direction, and ensure the overall structural stability of the split impeller. Within the lead angle of 50° to 60°, the width of the abutment strip can provide an effective abutment area for adjacent blade blocks in the axial direction. The lead angle is set to 50° to 60°, which can lower the center of gravity of the erected blade blocks. Even if the width of the abutment strip is set to be smaller, it can meet the size requirements of adjacent blade blocks in the axial direction. At the same time, it can reduce the weight of the blade blocks, which is convenient for production and assembly of the split impeller.

[0012] Therefore, when the lead angle is set to 50°~60°, the width of the abutment strip can be reduced to 1 / 10~1 / 5 of the farthest distance between the first half guide surface and the second half guide surface, which not only ensures the wind gathering effect of the guide surface, but also improves the stability of adjacent blade blocks, facilitating the transportation and assembly of the split impeller.

[0013] Further preferably, the abutment strip is provided with a plurality of support plates, the support plates are located between the two side panels of the leaf block, and the height of the support plates is set to 1 / 3 to 1 / 2 of the height of the panel of the leaf block. The design of the support plates is conducive to increasing the structural strength between the two side panels of the leaf block.

[0014] Further preferably, the blade block is provided with a plurality of reinforcing ribs, and the reinforcing ribs are connected to the two side panels and the support plate of the blade block. The design of the reinforcing ribs is conducive to reducing the deformation of the two side panels of the blade block, and further ensuring the overall structural strength of the split impeller.

[0015] Preferably, locking assemblies are provided at both ends of the main shaft, and the two locking assemblies clamp and fix the cover plate and the split impeller. The main shaft, the cover plate and the split impeller are locked by the locking assemblies to ensure the overall structural stability of the split impeller.

[0016] Preferably, a plurality of positioning pins are protruding from both side panels of the blade block, and the positioning pins are located on the inner wall of the blade block on a side away from the main shaft. The design of the positioning pins is conducive to the positioning and installation of the blade block.

[0017] Preferably, the cover plate includes a first cover plate and a second cover plate, and the first cover plate is provided with a mounting hole which is plugged and matched with the positioning pin.

[0018] Compared with the prior art, the beneficial results of the utility model are:

[0019] The technical solution of the utility model adopts a modular and assembled structure to reduce the processing cost, processing difficulty and installation and maintenance difficulty of the impeller manufacturing through the design and manufacture of the impeller in a split type, thereby facilitating the later installation and maintenance and helping to reduce the processing cost; the overall structure of the split impeller is stable, and the guide surface of the split impeller is designed with logarithmic spiral segments, which can change the phenomenon of single-action airflow in traditional blade design, improve the efficiency of the impeller, and realize efficient utilization of wind energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and are used together with the description to explain the principles of the utility model. It will be easy to recognize many expected advantages of other embodiments and embodiments because they become better understood by reference to the following detailed description. The elements of the accompanying drawings are not necessarily in proportion to each other. The same reference numerals refer to corresponding similar parts.

[0021] Figure 1 It is a schematic diagram of the overall structure of the assembled logarithmic spiral impeller of an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of an impeller unit layer in an assembled logarithmic spiral impeller according to an embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the blade block in the assembled logarithmic spiral impeller of an embodiment of the utility model;

[0024] Figure 4 for Figure 2 Schematic diagram of the enlarged structure of part A. Description of the drawings:

[0026] 1. Main shaft; 2. Split impeller;

[0027] 3. Cover plate; 31. First cover plate; 32. Second cover plate;

[0028] 4. Impeller unit layer; 41. Blade block; 42. Lead angle;

[0029] 5. guide surface; 51. first half guide surface; 52. second half guide surface;

[0030] 6. Positioning ring; 7. Ring groove; 8. Abutment strip; 9. Support plate; 10. Reinforcement rib; 11. Positioning pin; 12. Mounting hole; 13. Locking assembly. DETAILED DESCRIPTION

[0031] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the relevant utility model are shown in the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order to solve some defects of traditional impellers, logarithmic spiral impellers have emerged as a new impeller technology. Logarithmic spiral impellers have high power generation efficiency and can store gas and generate stable power at low wind speeds, which provides new ideas and technical means to solve the power generation problem under low wind speed conditions. However, logarithmic spiral impellers are manufactured in one piece, and the outer contour of the impeller is highly accurate, but the cost is high and the installation is inconvenient, which limits its promotion and application in practical applications.

[0034] Figure 1 The embodiment of the utility model discloses an assembled logarithmic spiral impeller, such as Figure 1 As shown, it includes a main shaft 1, a split impeller 2 and a cover plate 3, wherein the split impeller 2 is arranged on the main shaft 1, the cover plate 3 is detachably connected to both ends of the split impeller 2, and the cover plate 3 is detachably connected to the main shaft 1.

[0035] Among them, refer to Figure 1 and Figure 2 The split impeller 2 includes several groups of impeller unit layers 4 assembled and stacked, each group of impeller unit layers 4 includes a plurality of spliced ​​blade blocks 41, the blade blocks 41 are arranged around the main shaft 1, the peripheral side walls of the blade blocks 41 are arranged as two semi-guiding surfaces, and the two semi-guiding surfaces intersect on the side away from the main shaft 1, and the two semi-guiding surfaces on the adjacent blade blocks 41 form a complete guiding surface 5; the lower edge of the side of each semi-guiding surface is arranged as a logarithmic spiral segment, and the semi-guiding surface is formed by the logarithmic spiral segment of the lower edge of the side rotating upward around the main shaft 1, and the lead angle 42 of the edge of the semi-guiding surface away from the main shaft 1 is set to 50°~60°. Among them, the strike angle range of the first logarithmic spiral and the second logarithmic spiral is 60~80°.

[0036] Specifically, in a specific embodiment, the split impeller 2 is composed of 40 stacked blade blocks 41, and the upper and lower parts of the split impeller 2 are supported by a cover plate 3 and locked with a nut. The outer contour of the blade block 41 is composed of a convex first logarithmic spiral line, a concave second logarithmic spiral line, and a quarter arc, which are smoothly connected on the side close to the arc. The guide surface 5 of the split impeller 2 is composed of four blade blocks 41 spliced ​​together, and the complete impeller guide surface is formed by stacking the blade blocks 41 in the axial direction around the axis of the impeller.

[0037] Preferably, in this embodiment, the guide surface 5 includes a first half guide surface 51 located on one blade block 41 and a second half guide surface 52 located on another blade block 41, and the first half guide surface 51 and the second half guide surface 52 of adjacent blade blocks 41 are spliced ​​with each other. The guide surface 5 spliced ​​by the half guide surfaces designed by logarithmic spiral segments can change the phenomenon of single-action of airflow in the traditional blade block 41 design, improve the efficiency of the impeller, and achieve efficient use of wind energy.

[0038] In this embodiment, the height of the blade block 41 is 200 mm, and the error does not exceed 0.01 mm.

[0039] Specifically, refer to Figure 1 and Figure 2 , and also includes a positioning collar 6. An annular groove 7 is provided on the impeller unit layer 4. The annular groove 7 is arranged around the main shaft 1. The positioning collar 6 is installed in the annular groove 7. The height of the positioning collar 6 is greater than the depth of the annular groove 7. The adjacent impeller unit layers 4 are positioned and installed through the annular groove 7 and the positioning collar 6. By utilizing the cooperation of the positioning collar 6 and the annular groove 7, the positioning and installation of the impeller unit layer 4 is facilitated.

[0040] In this embodiment, arc-shaped slots are provided on the inner side of the arc of each blade block 41, i.e., the side close to the main shaft 1, at both ends of the blade block 41, and every four blade blocks 41 can be assembled into an annular groove 7, and the assembled annular groove 7 can be engaged with the positioning ring 6. In a specific embodiment, the annular groove 7 and the positioning ring 6 are interference fit.

[0041] Further, the plurality of blade blocks 41 on each group of the impeller unit layer 4 are arranged to be detachably connected, and the blade blocks 41 are fixedly installed by the cooperation of the annular groove 7 and the positioning collar 6. In this embodiment, each group of the impeller unit layer 4 is composed of four blade blocks 41. The impeller unit layer 4 is assembled by the blade blocks 41, and the blade blocks 41 are fixedly installed by the cooperation of the annular groove 7 and the positioning collar 6, which further reduces the difficulty of installation.

[0042] Reference Figure 2 and Figure 3 In this embodiment, in order to reduce the split impeller 2 (such as Figure 1The blade block 41 has a hollow interior. The blade block 41 is provided with an abutment strip 8, wherein the abutment strip 8 is extended along one side edge or both sides edge of the first half guide surface 51 and the second half guide surface 52, and the width of the abutment strip 8 is 1 / 10 to 1 / 5 of the farthest distance between the first half guide surface 51 and the second half guide surface 52.

[0043] In a specific embodiment, the abutment strip 8 is extended along one side edge of the first semi-guide surface 51, and the abutment strip 8 is integrally formed with the blade block 41. The design of the abutment strip 8 can increase the abutment area between adjacent blade blocks 41 in the axial direction, thereby ensuring the overall structural stability of the split impeller 2. The width setting of the abutment strip 8 is related to the size of the lead angle 42. Within the design range of the lead angle 42 of 50° to 60°, the center of gravity of the adjacent blade blocks 41 in the axial direction after erection is relatively low. At this time, only a narrower abutment strip 8 is required to meet the stability requirements of the erection between each blade block 41. In addition, the width of the abutment strip 8 can reduce the weight of the blade block 41, which is convenient for the transportation and assembly of the split impeller.

[0044] Furthermore, the abutment strip 8 is also connected to a plurality of support plates 9, which are located between the two side panels of the blade block 41, and the height of the support plates 9 is set to 1 / 3 to 1 / 2 of the panel height of the blade block 41. The blade block 41 is also provided with a plurality of reinforcing ribs 10, which are connected to the two side panels of the blade block 41 and the support plates 9. The design of the support plates 9 is conducive to increasing the structural strength between the two side panels of the blade block 41; the design of the reinforcing ribs 10 is conducive to reducing the deformation of the two side panels of the blade block 41, and further ensuring the overall structural strength of the split impeller 2.

[0045] Specifically, two support plates 9 are provided for one blade block 41 and are respectively formed on one side edge of two abutment bars 8. The height of the two support plates 9 is 1 / 2 of the height of the panel of the blade block 41. The two support plates 9 are connected and formed on the side away from the main shaft 1. The support plates 9 can reduce the amount of material used for structural support inside the blade block 41. Through the coordinated arrangement of the support plates 9 and the reinforcing ribs 10, the overall weight of the blade block 41 is reduced and the strength requirements of the blade block 41 are met.

[0046] In this embodiment, the number and position of the support plates 9 and the reinforcing ribs 10 can be designed for applicability according to design requirements in a specific embodiment, and are not specifically limited herein.

[0047] Further, see Figure 1 and Figure 4 A plurality of positioning pins 11 are protrudingly provided on both side panels of the leaf block 41 , and the positioning pins 11 are located on the inner wall of the leaf block 41 on the side away from the main shaft 1 .

[0048] Specifically, the following is a detailed description of two adjacent blade blocks 41 in the axial direction. During assembly, the positioning pin 11 of the upper blade block 41 is inserted into the inner wall of the panel of the lower blade block 41. The positioning pin 11 abuts against the inner wall of the panel of the lower blade block 41, reducing the relative displacement of the adjacent blade blocks 41 in the axial direction during the assembly process. When the guide surface 5 is affected by wind, the positioning pin 11 transmits the force to the lower blade block 41 in the axial direction, and the adjacent blade blocks 41 of the same unit layer transmit the force to the abutting parts, and then disperse it to the entire impeller, thereby improving the stability of the overall structure of the split impeller.

[0049] The cover plate 3 includes a first cover plate 31 and a second cover plate 32. The first cover plate 31 is provided with a mounting hole 12 that is plugged into the positioning pin 11. In a specific embodiment, the positioning pin 11 is integrally formed with the leaf block 41. The height of the positioning pin 11 is set to 5 mm. The positioning pin 11 of the leaf block 41 at the bottom is interference-fitted with the mounting hole 12. The positioning pin 11 is plugged into the mounting hole 12, which is conducive to the positioning and installation of the leaf block 41.

[0050] Furthermore, locking components 13 are provided at both ends of the main shaft 1, and the two locking components 13 clamp and fix the cover plate 3 and the split impeller 2. The main shaft 1, the cover plate 3 and the split impeller 2 are locked by the locking components 13 to ensure the overall structural stability of the split impeller 2.

[0051] In a specific embodiment, the locking assembly 13 includes a locking nut, a reverse thread locking nut, a stop washer, a bolt, a gasket, a connecting flange, etc., which are not specifically limited here.

[0052] The technical solution of the utility model adopts a modular and assembled structure to reduce the processing cost, processing difficulty and installation and maintenance difficulty of the impeller manufacturing through the design and manufacture of the impeller in a split type, which is convenient for the later installation and maintenance and is conducive to reducing the processing cost; the overall structure of the split impeller 2 is stable, and the guide surface 5 of the split impeller 2 is designed with a logarithmic spiral segment, which can change the phenomenon of single-action airflow in the traditional blade design, improve the efficiency of the impeller, and realize the efficient use of wind energy.

[0053] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the utility model is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the above utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the utility model (but not limited to) to form a technical solution.

Claims

1. An assembled logarithmic spiral impeller, characterized in that: It comprises a main shaft (1) and a split impeller (2) arranged on the main shaft (1), wherein the split impeller (2) comprises a plurality of groups of impeller unit layers (4) assembled and stacked; Each group of the impeller unit layers (4) comprises a plurality of spliced ​​blade blocks (41), the blade blocks (41) being arranged around the main shaft (1), the peripheral side walls of the blade blocks (41) being arranged as two semi-guiding surfaces, and the two semi-guiding surfaces intersecting at a side away from the main shaft (1), and the two semi-guiding surfaces of adjacent blade blocks (41) forming a complete guiding surface (5); The lower edge of the side of each semi-guiding surface is set as a logarithmic spiral line segment, and the semi-guiding surface is formed by rotating the logarithmic spiral line segment at the lower edge of the side around the main axis (1) and stretching it upward, and the lead angle (42) of the edge of the semi-guiding surface away from the main axis (1) is set to 50° to 60°; It also comprises a cover plate (3), wherein the cover plate (3) is detachably connected to the two ends of the split impeller (2), and the cover plate (3) is detachably connected to the main shaft (1).

2. The assembled logarithmic spiral impeller according to claim 1, characterized in that: It also comprises a positioning ring (6), the impeller unit layer (4) is provided with an annular groove (7), the annular groove (7) is arranged around the main shaft (1), the positioning ring (6) is arranged in the annular groove (7), and adjacent impeller unit layers (4) are positioned and installed through the annular groove (7) and the positioning ring (6).

3. The assembled logarithmic spiral impeller according to claim 2, characterized in that: The plurality of blade blocks (41) on each group of the impeller unit layer (4) are arranged to be detachably connected, and the blade blocks (41) are fixedly installed through the cooperation of the annular groove (7) and the positioning ring (6).

4. The assembled logarithmic spiral impeller according to claim 1, characterized in that: The flow guiding surface (5) comprises a first half flow guiding surface (51) and a second half flow guiding surface (52), and two adjacent first half flow guiding surfaces (51) and second half flow guiding surfaces (52) are spliced ​​with each other.

5. The assembled logarithmic spiral impeller according to claim 4, characterized in that: The blade block (41) is provided with an abutment strip (8), and the abutment strip (8) is extended along one side edge or both side edges of the first semi-guiding surface (51) and the second semi-guiding surface (52), and the width of the abutment strip (8) is 1 / 10 to 1 / 5 of the longest distance between the first semi-guiding surface (51) and the second semi-guiding surface (52).

6. The assembled logarithmic spiral impeller according to claim 5, characterized in that: A plurality of support plates (9) are arranged on the abutment strip (8), and the support plates (9) are located between the two side panels of the leaf block (41). The height of the support plates (9) is set to 1 / 3 to 1 / 2 of the panel height of the leaf block (41).

7. The assembled logarithmic helical impeller according to claim 6, characterized in that: The blade block (41) is provided with a plurality of reinforcing ribs (10), and the reinforcing ribs (10) are connected to the two side panels and the support plate (9) of the blade block (41).

8. The assembled logarithmic helical impeller according to claim 1, characterized in that: Locking assemblies (13) are provided at both ends of the main shaft (1), and the two locking assemblies (13) clamp and fix the cover plate (3) and the split impeller (2).

9. The assembled logarithmic helical impeller according to claim 1, characterized in that: A plurality of positioning pins (11) are protrudingly provided on both side panels of the leaf block (41), and the positioning pins (11) are located on the inner wall of the leaf block (41) on a side away from the main shaft (1).

10. The assembled logarithmic helical impeller according to claim 9, characterized in that: The cover plate (3) comprises a first cover plate (31) and a second cover plate (32); the first cover plate (31) is provided with a mounting hole (12) which is plugged and matched with the positioning pin (11).

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