A stepped impeller structure and its processing method

Abstract

A stepped impeller structure and its processing method belong to the technical field of impellers, and include a left disc, several middle discs, a right disc, an impeller shaft, several blades, and a driving motor; the left disc, the middle discs, and the right disc are each provided with several blade slot holes along the edge; the left, middle, and right of each blade are respectively a left insert piece, a middle insert piece, and a right insert piece; the left insert piece, the middle insert piece, and the right insert piece are inserted into and roll riveted to the blade slot holes; the blade is a stepped blade; several middle insert pieces divide the stepped blade into several blade segments; each blade segment includes several blade sub-segments; several blade sub-segments are each spaced and arranged at different heights; each pair of adjacent blade sub-segments at different heights is connected by a vertical plane, and the vertical plane is perpendicular to the blade plane; the beneficial effects of the present invention are: a large air supply surface area, a large air output, and low noise.

Description

Technical Field

[0001] The present invention relates to an impeller structure and a processing method thereof, and particularly to a stepped impeller structure and a processing method thereof, belonging to the technical field of impellers. Background Art

[0002] Generally, the blades in the impeller structure of a cross-flow fan are directly formed by a flat and slender thin steel strip made of aluminum alloy, which has been in common use for decades. However, with the development of productivity, people have put forward higher requirements for the impeller performance of cross-flow fans, especially for the air volume output of cross-flow fans. Since the blades made of flat and slender thin steel strips have a small air supply surface area during impeller rotation, the air volume that can be driven and blown out is small. The air resistance at the air impact edge of the blade is large, resulting in high noise. Summary of the Invention

[0003] The purpose of the present invention is to provide a stepped impeller structure and a processing method thereof to solve the defects in the prior art of the impeller structure and its processing method, such as small air supply and air return surface area, small air volume output, and high noise during impeller rotation, so as to achieve the purpose of large air supply surface area, large air volume output, and low noise during impeller rotation.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a stepped impeller structure, including a left disc, a plurality of middle discs, a right disc, an impeller shaft, a plurality of blades, and a driving motor. The impeller shaft is arranged in the central hole of the right disc; the left disc and the right disc have the same structure.

[0005] A plurality of blade slots are arranged along the edges of the left disc, the middle discs, and the right disc respectively, and the number of the blade slots corresponds to the number of the blades; the left, middle, and right parts of each blade are respectively a left insert piece, a middle insert piece, and a right insert piece; the left insert piece is inserted into and roll-riveted to the blade slot of the left disc; the middle insert piece is inserted into and roll-riveted to the blade slot of the middle disc; the right insert piece is inserted into and roll-riveted to the blade slot of the right disc.

[0006] The blade is a stepped blade, and the stepped blade, the middle disc, the left disc, the impeller shaft, the right disc, and the driving motor form a stepped impeller structure.

[0007] The number of the middle insert pieces corresponds to the number of the middle discs; a plurality of middle insert pieces divide the stepped blade into a plurality of blade segments with equal lengths; each blade segment includes a plurality of blade sub-segments; the plurality of blade sub-segments are arranged at intervals and with different heights, and the planes of the high blade sub-segments are in the same plane, and the planes of the low blade sub-segments are in the same plane; each two adjacent high and low blade sub-segments are connected by a vertical plane, the vertical plane is perpendicular to the blade plane, and the height H of the vertical plane is 1 to 2 mm; there are a plurality of notches on both sides of each blade sub-segment, and the notches are V-shaped notches, concave notches, or wavy notches.

[0008] Before installing the blades, the left disk, the middle disk, and the right disk further include a number of gaps, which are respectively arranged outside a number of blade slots and along the extension lines of the blade slots outward; the inner ends of the gaps communicate with the blade slots, and the outer ends of the gaps open outward;

[0009] When installing the blades, the middle inserts of each stepped blade are respectively inserted into the corresponding blade slots through the corresponding gaps, and the left inserts, middle inserts, and right inserts of each stepped blade are inserted into the blade slots from the gaps and are then fixed by the corresponding blade slots;

[0010] Finally, the left disk, the middle disk, and the right disk are integrated with the blades through roll riveting, and the a number of gaps are closed.

[0011] The stepped impeller has 1 middle disk, and each stepped impeller has 24 stepped blades.

[0012] The stepped blade is provided with 1 middle insert, and the middle insert is inserted into the blade slot of the middle disk; the middle insert divides the stepped blade into 2 blade segments with equal lengths; each blade segment includes 7 blade sub-segments, including 3 high blade sub-segments and 4 low blade sub-segments; the notches on both sides of each blade sub-segment are V-shaped notches.

[0013] The left disk, the middle disk, and the right disk each include 24 gaps, which are respectively arranged outside 24 blade slots and along the extension lines of the blade slots outward.

[0014] A processing method for a stepped impeller structure, the processing method includes the following steps:

[0015] (1) Select a hard aluminum alloy strip with a width of 9.8 mm and a thickness of 0.43 mm;

[0016] (2) Cut the aluminum strip: Cut the hard aluminum alloy strip to the required length of the blade by using cutting equipment;

[0017] (3) Notch processing: Make notched blades by punching;

[0018] (4) Make stepped blades: Use a rolling process to make the steps of the blades; the height of the vertical plane between two steps is 1.7 mm;

[0019] (5) Insert the blades: Insert the left inserts, middle inserts, and right inserts of the stepped blades into the left disk, the middle disk, and the right disk through the corresponding gaps in sequence;

[0020] (6) Blade in place: Then insert the left inserts, middle inserts, and right inserts of all the blades into the blade slots of the left disk, the right disk, and the middle disk respectively;

[0021] (7) Riveting the impeller: After all the blades are inserted, the left disk, the middle disk, and the right disk are riveted together with the blades to form an integral body, and several gaps are closed.

[0022] (8) Then, insert the impeller shaft into the central hole of the right disk, and connect the drive shaft of the drive motor to the impeller shaft.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: A stepped impeller structure and its processing method are provided. The blades are arranged in a staggered manner, increasing the length of the blades without changing the length of the wind wheel. When the impeller rotates, the air supply surface area becomes larger, the air output becomes larger, and the cooling effect is good, which can meet the urgent need for cooling in the hot summer climate. The edge of the blade is changed from a straight line to a notched shape, increasing the cutting area and reducing the cutting resistance, thereby reducing the noise. Description of the Drawings

[0024] Figure 1 is: The front view of the present invention;

[0025] Figure 2 is: The perspective view of the present invention;

[0026] Figure 3 is: The left view of the present invention;

[0027] Figure 4 is: The front view of the stepped blade;

[0028] Figure 4-1 is: The left view of the stepped blade;

[0029] Figure 5 is: Figure 4 The enlarged view of part A;

[0030] Figure 6 is: The perspective view of the stepped blade;

[0031] Figure 7 is: Figure 6 The enlarged view of part B;

[0032] Figure 8 is: The front view of the middle disk with gaps.

[0033] Description of the reference numerals: Left disk 1, Middle disk 2, Right disk 3, Blade 4, Blade segment 401, Small blade segment 402, Vertical plane 403, Gap 404, Notch 405, Impeller shaft 5, Drive motor 6, Blade slot hole 7, Left insert piece 8, Middle insert piece 9, Right insert piece 10. Specific Embodiments

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The "left, right, front, and back" described in this embodiment are for convenience of description, and technical solutions with opposite directions and the same structure are within the protection scope of this application.

[0035] As Figures 1 to 8 shown, a stepped impeller structure, as Figure 1 , Figure 2 and Figure 3 shown, includes a left disk 1, one middle disk 2, a right disk 3, an impeller shaft 5, a plurality of blades 4, and a driving motor 6. The impeller shaft 5 is arranged in the central hole of the right disk 3; as Figure 8 shown, the left disk 1 and the right disk 3 have the same structure;

[0036] A plurality of blade slot holes 7 are respectively arranged along the edges of the left disk 1, the middle disk 2, and the right disk 3. The number of the blade slot holes 7 corresponds to the number of the blades 4; the left, middle, and right of each blade 4 are respectively a left insert piece 8, a middle insert piece 9, and a right insert piece 10; the left insert piece 8 is inserted and roll-riveted to the blade slot hole 7 of the left disk 1; the middle insert piece 9 is inserted and roll-riveted to the blade slot hole 7 of the middle disk 2; the right insert piece 10 is inserted and roll-riveted to the blade slot hole 7 of the right disk 3;

[0037] As Figures 4 to 7 shown, the blade 4 is a stepped blade 4. The stepped blade 4, the middle disk 2, the left disk 1, the impeller shaft 5, the right disk 3, and the driving motor 6 form a stepped impeller structure;

[0038] The number of the middle insert pieces 9 corresponds to the number of the middle disks 2; the middle insert pieces 9 divide the stepped blade 4 into two blade segments 401 with equal lengths; each blade segment 401 includes a plurality of blade sub-segments 402; the plurality of blade sub-segments 402 are respectively arranged at intervals and with different heights. The planes of the high blade sub-segments 402 are in the same plane, and the planes of the low blade sub-segments 402 are in the same plane; each two adjacent high and low blade sub-segments 402 are connected by a vertical plane 403. The vertical plane 403 is perpendicular to the plane of the blade 4, and the height H of the vertical plane 403 is 1.7 mm; there are a plurality of notches 405 on both sides of each blade sub-segment, and the notches are V-shaped notches.

[0039] As Figure 8As shown, before installing the blades 4, the left disk 1, the middle disk 2, and the right disk 3 further include a number of gaps 404, which are respectively arranged outside a number of blade 4 slots and along the extension lines of the blade 4 slots outward; the inner ends of the gaps 404 communicate with the blade 4 slots, and the outer ends of the gaps 404 open outward.

[0040] When installing the blades 4, the middle inserts 9 of each stepped blade 4 are inserted into the corresponding blade 4 slots through the corresponding gaps 404, and the left inserts 8, middle inserts 9, and right inserts 10 of each stepped blade 4 are inserted into the blade 4 slots from the gaps 404 and are then fixed by the corresponding blade 4 slots.

[0041] Finally, the left disk 1, the middle disk 2, and the right disk 3 are integrated with the blades 4 by roll riveting, and a number of gaps 404 are closed.

[0042] As Figure 1 and Figure 2 shown, each stepped impeller has 24 stepped blades 4.

[0043] As Figures 4 to 7 shown, the stepped blade 4 is provided with 1 middle insert 9, and the middle insert 9 is inserted into the blade slot hole 7 of the middle disk 2; each blade segment 401 includes 7 blade sub-segments 402, including 3 high blade sub-segments 402 and 4 low blade sub-segments 402.

[0044] As Figure 8 shown, the left disk 1, the middle disk 2, and the right disk 3 each include 24 gaps 404, which are respectively arranged outside 24 blade 4 slots and along the extension lines of the blade 4 slots outward.

[0045] A processing method for a stepped impeller structure, the processing method comprising the following steps:

[0046] (1) Select a hard-state aluminum alloy strip with a width of 9.8 mm and a thickness of 0.43 mm;

[0047] (2) Cut the aluminum strip: Cut the hard-state aluminum alloy strip to the length required for the blades 4 using cutting equipment;

[0048] (3) Notch processing: Make the blades 4 with notches 405 by punching;

[0049] (4) Make stepped blades: Use a rolling process to make the steps of the blades 4; the height H of the vertical plane 403 between two steps is 1.7 mm;

[0050] (5) Insert the blades: Insert the left inserts, middle inserts 9, and right inserts of the stepped blades 4 into the left disk 1, the middle disk 2, and the right disk 3 in sequence through the corresponding gaps 404;

[0051] (6) Blades in place: Then insert the left inserts, middle inserts 9, and right inserts of all the blades 4 into the blade slots 7 of the left disk 1, right disk 3, and middle disk 2 respectively.

[0052] (7) Rivet the impeller: After all the blades 4 are inserted, the left disk 1, middle disk 2, and right disk 3 are integrated with the blades 4 through riveting, and several gaps 404 are closed.

[0053] (8) Then install the impeller shaft 5 into the central hole of the right disk 3, and connect the drive shaft of the drive motor 6 with the impeller shaft 5.

[0054] The above-described embodiments are only relatively preferred embodiments of the present invention. Ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A stepped impeller structure, which is used for a cross-flow fan; the cross-flow fan includes a driving motor; the impeller structure includes a left disk, a middle disk, a right disk, an impeller shaft, and a number of blades, and the impeller shaft is arranged in the central hole of the right disk; the left disk and the right disk have the same structure, and are characterized in that: The left disk, the middle disk, and the right disk are each provided with a number of blade slot holes along the edge, and the number of the blade slot holes corresponds to the number of the blades; the left, middle, and right of each blade are respectively a left insert piece, a middle insert piece, and a right insert piece; the left insert piece is inserted and roll-riveted to the blade slot hole of the left disk; the middle insert piece is inserted and roll-riveted to the blade slot hole of the middle disk; the right insert piece is inserted and roll-riveted to the blade slot hole of the right disk; The blade is a stepped blade, and the steps are arranged on the blade surface, so that when the impeller rotates, the air supply surface area becomes larger; The number of middle insert pieces on each blade corresponds to the number of middle disks; the middle insert pieces divide a stepped blade into a number of blade segments with equal lengths; each blade segment includes a number of blade sub-segments; the a number of blade sub-segments are spaced apart and arranged at different heights, and the planes of the high blade sub-segments are in the same plane, and the planes of the low blade sub-segments are in the same plane; each two adjacent blade sub-segments with different heights are connected by a vertical plane, and the vertical plane is perpendicular to the blade plane, and the height of the vertical plane is 1 to 2 mm; there are a number of notches on both sides of each blade sub-segment, and the notches are V-shaped notches, concave notches or wavy notches; Before installing the blades, the left disk, the middle disk, and the right disk further include a number of gaps, which are respectively arranged outside a number of blade slot holes and on the extension line along the blade slot hole outward; the inner end of the gap is communicated with the blade slot hole, and the outer end of the gap opens outward; When installing the blades, the middle insert piece of each stepped blade is inserted into the corresponding blade slot hole through the corresponding gap, and the left insert piece, the middle insert piece, and the right insert piece of each stepped blade are inserted into the blade slot hole from the gap, and then are fixed by the corresponding blade slot hole; Finally, the left disk, the middle disk, and the right disk are roll-riveted to form an integral body with the blades, and a number of gaps are closed.

2. The stepped impeller structure according to claim 1, characterized in that: The number of middle disks is 1, and the stepped impeller structure has 24 stepped blades.

3. A stepped impeller structure according to claim 1, characterized in that: Each stepped blade is provided with 1 middle insert piece, and the middle insert piece is inserted into the blade slot hole of the middle disk; the middle insert piece divides the stepped blade into 2 blade segments with equal lengths; each blade segment includes 7 blade sub-segments, including 3 high blade sub-segments and 4 low blade sub-segments; the notches on both sides of each blade sub-segment are V-shaped notches.

4. A stepped impeller structure according to claim 1, characterized in that: The left disk, the middle disk, and the right disk each include 24 gaps, which are respectively arranged outside 24 blade slot holes and on the extension line along the blade slot hole outward.

5. A processing method for a stepped impeller structure according to any one of claims 1 to 4, characterized in that: The processing method includes the following steps: (1) Select a hard aluminum alloy strip with a width of 9.8 mm and a thickness of 0.43 mm; (2) Cut the aluminum strip: Cut the hard aluminum alloy strip to the required length of the blade by using cutting equipment; (3) Notch processing: The aluminum strip is made into a blade with notches by punching; (4) Make stepped blades: Use a rolling process to make the steps of the blades; the height of the vertical plane between adjacent steps is 1.7 mm; (5) Insert the blades: Insert the left insert piece, middle insert piece, and right insert piece of the stepped blade into the left disk, middle disk, and right disk through the corresponding gaps in sequence. (6) Blades in place: Then insert the left insert piece, middle insert piece, and right insert piece of all the blades into the blade slot holes of the left disk, middle disk, and right disk respectively. (7) Rivet the impeller: After all the blades are inserted, the left disk, middle disk, and right disk are integrated with the blades by rolling riveting, and several gaps are closed. (8) Then install the impeller shaft into the central hole of the right disk, and connect the drive shaft of the drive motor to the impeller shaft.

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