Novel crossflow fan impeller and assembly method thereof

Abstract

A novel crossflow fan impeller and an assembly method thereof belong to the technical field of crossflow fans, and include more than two fixed disks and fan blades. The fan blades include several blades, and a plurality of blade fixing slots are evenly arranged around the fixed disk, and the number of blade fixing slots is equal to the number of blades; a reference hole is arranged in the middle of the fixed disk, and four key slots are evenly arranged around the reference hole; the blade fixing slot is a slot cut obliquely along the circumferential direction of the edge of the fixed disk, and the blade is a rectangular strip body, which is installed in the blade fixing slot to connect all the fixed disks together; the blade section is an arc section, the width of the blade arc section is more than 7mm, the height of the blade arc section is more than 1mm, and the arc radius of the blade arc section is more than 5mm; a notch is arranged on the outer side of the blade, and the blade between each two fixed disks contains more than 20 notches; the notch is a V-shaped notch, a concave notch or a wave-shaped notch. The beneficial effects of the present invention are: the wind cutting area is increased, the wind speed is large, and the noise is small.

Description

Technical Field

[0001] The present invention relates to a crossflow fan impeller and an assembly method thereof, and in particular to a novel crossflow fan impeller and an assembly method thereof, and belongs to the technical field of crossflow fans. Background Art

[0002] With the rapid development of modern society and the improvement of people's living standards, the demand for various types of air conditioning, heaters, air curtains and other cooling and heating equipment has increased significantly in homes, offices and public places. The crossflow impeller is one of the most important components in air conditioning, heaters, air curtains and other heating equipment, and plays a key role in the circulation of air with temperature differences.

[0003] However, in the structure of the existing cooling and heating equipment, the blade sides of the crossflow impeller are all in a straight state, the wind speed is low, and the noise is high, which needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of crossflow fan impeller to achieve the purpose of high wind speed and low noise in view of the defects of the above-mentioned prior art, namely, low wind speed and high noise.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a new crossflow fan impeller is a barrel-shaped wheel-shaped body, referred to as an impeller, including more than two fixed disks and fan blades, the fan blades include a plurality of blades, a plurality of blade fixing slots are evenly arranged around the fixed disk, and the number of blade fixing slots is equal to the number of blades; a reference hole is arranged in the middle of the fixed disk, and four key slots are evenly arranged around the reference hole; the blade fixing slot is a slot cut obliquely along the circumferential direction of the edge of the fixed disk, the blade is a rectangular strip body, installed in the blade fixing slot, and all the fixed disks are connected together; the blade cross section is an arc cross section, the width of the blade arc cross section is more than 7mm, the height of the blade arc cross section is more than 1mm, and the arc radius of the blade arc cross section is more than 5mm;

[0006] The blade is provided with a notch on the outward side, and the blade between each two fixed disks contains more than 20 notches; the notch depth is 1.3-1.7 mm, and the notch width is 1.8-2.2 mm; the notch is a V-shaped notch, a concave notch or a wavy notch, and the notch angle of the V-shaped notch is 65-73°.

[0007] The impeller comprises three fixed disks and 24 blades. The fixed disks are a front fixed disk, a middle fixed disk and a rear fixed disk. 24 blade fixing slots are evenly arranged around the fixed disks.

[0008] The width of the blade arc section is 7.7 mm, the height of the blade arc section is 1.8 mm, and the arc radius of the blade arc section is 5.5 mm.

[0009] The blades between every two fixed disks include 25 notches, the notch depth is 1.5 mm, and the blade notch width is 2 mm.

[0010] The V-shaped notch has a V-shaped notch angle of 68°.

[0011] The upper convex edge and the lower bottom edge of the concave notch are equal in length.

[0012] The shape and size of the upper wave line of the wavy notch are equal to the shape and size of the lower wave line, and the upper wave line and the lower wave line are in opposite directions, connected to each other, and cross-arranged.

[0013] The assembly of the new crossflow fan impeller includes the following steps:

[0014] (1) Raw material preparation process: the thickness of the raw material blank is 0.35 mm, and the width of the raw material blank is 197 ± 0.3 mm;

[0015] (2) Blade forming and cutting process: Figures 3 to 9 As shown, the equipment used is a high-speed punch press and a stamping die; the stamping die includes a V-shaped notch blade stamping die, a concave notch blade stamping die and a wave-shaped notch blade stamping die; the cut blade length is 180 mm, the width of the blade arc section is 7.7 mm, and the height of the blade arc section is 1.8 mm;

[0016] (3) Impeller assembly process:

[0017] ①Select the corresponding 3 fixed plates and 24 blades and place them neatly on the workbench;

[0018] ②Insert the blades into the three fixing plates one by one through the fixing plate slots until the fixing plate slots are filled;

[0019] ③Separate the fixing plates along the blades so that the spacing between the fixing plates meets the design requirements;

[0020] ④ Check the blades for any uneven lengths, and replace them if necessary;

[0021] (4) Impeller riveting process:

[0022] ① The tooling includes a roller frame, a mandrel, a pneumatic clamping switch and a 60 tooling locking screw. Insert the impeller vertically into the mandrel, put on the 60 tooling locking screw, and press the pneumatic clamping switch to fix the blades neatly;

[0023] ②Including the impeller rolling riveting machine, start the impeller rolling riveting machine, use the rubber block to move the fixed plate and adjust it to the center of the rolling riveting cutter;

[0024] ③ Press the cutter on the machine and rivet the impeller to form a combined impeller;

[0025] ④ Loosen the fixing plate, loosen the tooling screws, take out the parts and put them into the turnover box;

[0026] (5) Impeller cleaning process:

[0027] ① It includes a cleaning frame and an ultrasonic cleaning tank. The impellers are placed vertically next to each other in the cleaning frame, and the cleaning frame is placed in the ultrasonic cleaning tank as a whole;

[0028] ② Including an ultrasonic cleaning machine, adjust the ultrasonic parameters according to the parameter table for ultrasonic cleaning, the cleaning time is 1 minute, and the rinsing time is 1 minute;

[0029] ③Including a rinsing tank, lift the cleaning frame to filter the cleaning liquid and put it into the rinsing tank for rinsing;

[0030] ④ Lift the cleaning frame to filter the cleaning liquid, put it into the electric thermostatic box, adjust the box temperature to 100℃, and carry out drying and dehydration treatment. The drying temperature is 100±5℃ and the drying time is 10min;

[0031] ⑤ Take the cleaned impeller out of the cleaning frame and place it neatly in the turnover box;

[0032] (6) Steel shaft riveting process:

[0033] ① Prepare the impeller and steel shaft assembly, and confirm the rotation direction of the impeller according to the drawing or production plan;

[0034] ②Including an open tilting punch press and its punch press die, placing the steel shaft assembly and the impeller into the punch press die as required;

[0035] ③Start the punch press and complete the punching;

[0036] Inspection: Insert the rubber bearing into the front fixed plate Place a dial indicator on the measuring stand in the hole and check whether the radial runout of the steel shaft is within 0.06mm according to the requirements of the drawing;

[0037] (7) Shaft bearing rubber assembly process: insert the shaft bearing rubber into the combined impeller fixing plate;

[0038] (8) Impeller inspection process:

[0039] ①Including measuring stand and dial indicator, put the impeller component into the measuring stand, adjust the dial indicator to the measured part of the impeller, rotate the combined impeller, and record the measured value of each measured point;

[0040] ② Including copper rod, when the measured value exceeds the process technical requirements, use the copper rod to gently tap the fixed plate until the measured value meets the process technical requirements;

[0041] ③Take out the impeller and place them in the turnover box in order.

[0042] The specific technical requirements of each process are as follows:

[0043] (1) Raw material preparation process: Fig.10 As shown, the raw material used is alloy aluminum strip, and the material grade is 3003;

[0044] (2) Blade forming and cutting process: Figures 3 to 6 As shown, inspection specifications: blade length and blade width are measured with a 0.02 / 200 caliper and collected with a blade collector;

[0045] (3) Impeller assembly process: Key points of process control: uniform spacing between fixed disks and alignment of process holes of fixed disks;

[0046] (4) Impeller rolling riveting process: The impeller rolling riveting machine model is HQ-500-C, and the tooling number is GL45.178Z-01-B2; the process control requirements are that the impeller is riveted firmly without looseness, and the outer diameter of the fixed plate after rolling riveting is consistent with the fixed plate Hole runout is less than 0.3mm; Inspection: Use a 0.02 / mm caliper to measure the outer diameter of the combined impeller. If the 24-slot fixed disc rolls to The impeller runout measured with a measuring seat / diameter is less than 0.3mm; the impeller product model is GL60×180, that is, the impeller diameter is 60mm and the impeller length is 180mm;

[0047] (5) Impeller cleaning process: Fig.15 and Figure 1 As shown, the ultrasonic cleaning machine model is DS-1, the ultrasonic frequency is 85 (scale), and the ultrasonic power is 2KW; the cleaning frame is rectangular, and the internal size of the cleaning frame (length × width) is 730×180mm; the detergent name is neutral detergent, and the solution concentration is 5% (weight ratio);

[0048] (6) Steel shaft riveting process: The product model of the open tilting press is J23-6.3, and the impeller rotates in the counterclockwise direction;

[0049] (7) Shaft bearing rubber assembly process: The shaft bearing rubber ring groove is completely and evenly placed in the reference hole of the fixed plate, and the stop key is placed in the keyway of the fixed plate;

[0050] (8) Impeller calibration process: Use a measuring stand / diameter to measure the runout of the fixed plate to be less than 0.3, and the runout of the steel shaft assembly near the fixed plate to be less than 0.04.

[0051] The shape of the V-shaped notch blade stamping die corresponds to the V-shaped notch blade, the shape of the concave notch blade stamping die corresponds to the concave notch blade, and the shape of the wavy notch blade stamping die corresponds to the wavy notch blade.

[0052] The stamping die includes six processes: the first process is punching positioning holes, the second process is punching length positioning notches, the third process is punching notches and breaking, the fourth process is punching arc surfaces, the fifth process is arc surface shaping, and the sixth process is cutting.

[0053] Stamping die pressing process: When the raw material blank enters the first process, the positioning holes are punched, and the distance between the two positioning holes is 7.7mm, which is the width of a blade; when it enters the second process, the length positioning notch is punched, and the length between the two notches on the left and right is 180mm; when it enters the third process, the notch shape and the fracture are punched out, and the distance between the two fractures is 7.7mm, forming the prototype of the blade; the prototype of the blade enters the fourth process and is punched into an arc-shaped blade; the arc-shaped blade enters the fifth process and continues to be reinforced; the blade enters the sixth process, and the fracture is completely cut off to form the final blade.

[0054] Compared with the prior art, the invention has the following beneficial effects: the straight line on the outward side of the fan blade is changed to a continuous notch, which increases the wind cross-sectional area, resulting in high wind speed and low noise. Taking an impeller with a diameter of 60mm and a blade side length of 180mm, and a V-shaped notch as an example, the blade thickness is 0.35mm, and the side length is 180mm. After the notch is added, the side length becomes 260mm. The parameters are shown in the comparison table:

[0055] Wind cutting area Wind speed noise Original parameters <![CDATA[180mm*0.35mm=63mm 2 ]]> 3.4 44-46db Parameters of the present invention <![CDATA[260mm*0.35mm=91mm 2 ]]> 3.6 43-45db BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is: the front view of the present invention;

[0057] Figure 2 is: a top view of the present invention;

[0058] Figure 3 Yes: Enlarged view of blade cross section;

[0059] Figure 4 Yes: Front view of the blade (the notch is V-shaped);

[0060] Figure 5 Yes: front view of the blade (the notch is concave);

[0061] Figure 6 Yes: front view of the blade (the notch is wavy);

[0062] Figure 7 yes: Figure 4 A magnified view of part A (the notch is V-shaped);

[0063] Figure 8 yes: Figure 5 A magnified view of part B (the notch is concave);

[0064] Fig. 9 yes: Figure 6A magnified view of part C (the notch is wavy);

[0065] Fig.10 It is: process (1) the main view of the raw material blank;

[0066] Fig.11 yes: Fig.10 A magnified view of part A;

[0067] Fig.12 yes: Fig.10 Left view of the lower expanded part of the raw material blank;

[0068] Fig.13 It is: the front view of the impeller after assembly in process (3);

[0069] Fig.14 Yes: stamping die drawing;

[0070] Fig.15 Yes: Schematic diagram of the assembly and stacking of the impellers in the cleaning tank in step (5);

[0071] Fig.16 Yes: Process (6) Front view of the assembly of the impeller and the steel shaft;

[0072] Fig.17 Yes: process (6) top view of the impeller and steel shaft assembly;

[0073] Fig.18 Yes: Process (7) Front view of the assembly of the impeller, steel shaft and shaft with rubber;

[0074] Fig.19 Yes: Process (8) impeller verification structure diagram.

[0075] Explanation of the accompanying drawings: fixed plate 1, reference hole 101, blade fixing slot hole 102, keyway 103, front fixed plate 104, middle fixed plate 105, rear fixed plate 106, blade 2, notch 201, upper convex edge 202, lower bottom edge 203, upper wave line 204, lower wave line 205, steel shaft assembly 3, shaft bearing rubber 4, measuring frame 5, dial indicator 6, stamping die 7, first process 701, second process 702, third process 703, fourth process 704, fifth process 705, sixth process 706, positioning hole 707. DETAILED DESCRIPTION

[0076] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0077] Embodiment 1:

[0078] like Figures 1 to 19 As shown, the new crossflow fan impeller, such as Figures 1 to 3As shown, it is a barrel-shaped wheel-shaped body, referred to as an impeller, including three fixed disks 1 and a fan blade, wherein the fan blade includes 24 blades 2, and 24 blade fixing slots 102 are evenly arranged around the fixed disk 1, and the number of the blade fixing slots 102 is equal to the number of the blades 2; a reference hole 101 is arranged in the middle of the fixed disk 1, and four key slots 103 are evenly arranged around the reference hole 101; the blade fixing slot 102 is a slot cut obliquely along the circumferential direction of the edge of the fixed disk 1, and the blade 2 is a rectangular strip body, which is installed in the blade fixing slot 102 to connect all the fixed disks 1 together; the cross section of the blade 2 is an arc cross section, the width S of the arc cross section of the blade 2 is 7.7 mm, the height h of the arc cross section of the blade 2 is 1.8 mm, and the arc radius R of the arc cross section of the blade 2 is 5.5 mm;

[0079] like Figures 4 to 9 As shown, the blade 2 is provided with a notch 201 on the outward side, and the blade 2 between every two fixed plates 1 includes 25 notches 201; the depth m of the notch 201 is 2 mm, and the width n of the notch 201 is 1.8-2.2 mm; the notch 201 is a V-shaped notch 201, and the notch 201 angle α of the V-shaped notch 201 is 68°.

[0080] like Figure 1 and Figure 2 As shown, the fixed plate 1 includes a front fixed plate 104 , a middle fixed plate 105 and a rear fixed plate 106 .

[0081] The assembly of the new crossflow fan impeller includes the following steps:

[0082] (1) Raw material preparation process: Fig.10 , Fig.11 , Fig.12 As shown, the raw material blank thickness δ is 0.35 mm, and the raw material blank width K is 197 mm;

[0083] (2) Blade 2 forming and cutting process: Figures 3 to 9 As shown, the equipment used is a high-speed punch press and a V-shaped notch 201 blade 2 punching die 7.

[0084] The length L of the cutting blade 2 is 180 mm, the width S of the arc-shaped cross section of the blade 2 is 7.7 mm, and the height h of the arc-shaped cross section of the blade 2 is 1.8 mm;

[0085] (3) Impeller assembly process: Fig.13 As shown,

[0086] ① Select the corresponding three fixed plates 1 and 24 blades 2 and place them neatly on the workbench;

[0087] ② Insert the blades 2 into the three fixing plates 1 one by one through the slots of the fixing plate 1 until the slots of the fixing plate 1 are filled;

[0088] ③ Separate the fixing plates 1 along the blades 2 so that the spacing between the fixing plates 1 meets the design requirements;

[0089] ④ Align blade 2 to check if there is any unevenness in length, if so, replace it;

[0090] (4) Impeller riveting process:

[0091] ① The tooling includes a roller frame, a mandrel, a pneumatic clamping switch and a 60 tooling locking screw. Insert the impeller vertically into the mandrel, put on the 60 tooling locking screw, and press the pneumatic clamping switch to fix the blades 2 neatly;

[0092] ②Including an impeller rolling riveting machine, start the impeller rolling riveting machine, use a rubber block to move the fixed plate 1 and adjust it to the center of the rolling riveting cutter;

[0093] ③ Press the cutter on the machine and rivet the impeller to form a combined impeller;

[0094] ④ Loosen the fixing plate, loosen the tooling screws, take out the parts and put them into the turnover box;

[0095] (5) Impeller cleaning process: Fig.15 and Figure 1 As shown,

[0096] ① It includes a cleaning frame and an ultrasonic cleaning tank. The impellers are placed vertically next to each other in the cleaning frame, and the cleaning frame is placed in the ultrasonic cleaning tank as a whole;

[0097] ② Including an ultrasonic cleaning machine, adjust the ultrasonic parameters according to the parameter table for ultrasonic cleaning, the cleaning time is 1 minute, and the rinsing time is 1 minute;

[0098] ③ Including a rinsing tank (not shown in the figure), lift the cleaning frame to filter the cleaning liquid and put it into the rinsing tank for rinsing;

[0099] ④ Lift the cleaning frame to filter the cleaning liquid, put it into the electric thermostatic box, adjust the box temperature to 100℃, and carry out drying and dehydration treatment. The drying temperature is 100±5℃ and the drying time is 10min;

[0100] ⑤ Take the cleaned impeller out of the cleaning frame and place it neatly in the turnover box;

[0101] (6) Steel shaft riveting process: Fig.16 and Fig.17 As shown,

[0102] ① Prepare the impeller and steel shaft assembly 3, and confirm the rotation direction of the impeller according to the drawing or production plan;

[0103] ② Including an open tilting punch press and its punch press mold (not shown in the figure), the steel shaft assembly 3 and the impeller are placed in the punch press mold as required;

[0104] ③Start the punch press and complete the punching;

[0105] Inspection: Insert the rubber bearing into the front fixed plate 1 Place a dial indicator on the measuring stand in the hole and check whether the radial runout of the steel shaft is within 0.06mm according to the requirements of the drawing;

[0106] (7) Rubber bearing assembly process: Fig.18 and Figure 2 As shown, insert the shaft bearing rubber into the combined impeller fixing plate 1;

[0107] (8) Impeller inspection process: Fig.19 As shown,

[0108] ①Including measuring stand and dial indicator, put the impeller component into the measuring stand, adjust the dial indicator to the measured part of the impeller, rotate the combined impeller, and record the measured value of each measured point;

[0109] ② Including the copper rod, when the measured value exceeds the process technical requirements, use the copper rod to gently tap the fixed plate 1 until the measured value meets the process technical requirements;

[0110] ③Take out the impeller and place them in the turnover box in order.

[0111] The specific technical requirements of each process are as follows:

[0112] (1) Raw material preparation process: Fig.10 As shown, the raw material used is alloy aluminum strip, and the material grade is 3003;

[0113] (2) Blade 2 forming and cutting process: Figures 3 to 6 As shown, inspection specifications: blade 2 length L and blade 2 width S are measured with a 0.02 / 200 caliper and collected with a blade 2 collector;

[0114] (3) Impeller assembly process: Fig.13 As shown, the key points of process control are: the spacing of the fixed plate 1 is uniform, and the process holes of the fixed plate 1 are aligned;

[0115] (4) Impeller riveting process: Fig.14 As shown in the figure, the impeller rolling riveting machine model is HQ-500-C, and the tooling number is GL45.178Z-01-B2; the process control requirements are that the impeller is riveted firmly without looseness, and the outer diameter of the fixed plate 106 after rolling riveting is the same as that of the fixed plate 1 Hole runout is less than 0.3mm; Inspection: Use a 0.02 / mm caliper to measure the outer diameter of the combined impeller. For example, if the 24-slot fixed disk 1 rolls to The impeller runout measured with a measuring seat / diameter is less than 0.3mm; the impeller product model is GL60×180, that is, the impeller diameter D is 60mm and the impeller length L is 180mm;

[0116] (5) Impeller cleaning process: Fig.15 and Figure 1 As shown, the ultrasonic cleaning machine model is DS-1, the ultrasonic frequency is 85 (scale), and the ultrasonic power is 2KW; the cleaning frame is rectangular, and the internal size of the cleaning frame (length × width) is 730×180mm; the detergent name is neutral detergent, and the solution concentration is 5% (weight ratio);

[0117] (6) Steel shaft riveting process: Fig.16 and Fig.17 As shown, the product model of the open tilting punch press is J23-6.3, and the impeller rotates counterclockwise;

[0118] (7) Rubber bearing assembly process: Fig.18 and Figure 2 As shown, the shaft receiving rubber 4 ring groove is completely and evenly placed in the reference hole 101 of the fixed plate 1, and the stop key is placed in the keyway 103 of the fixed plate 1;

[0119] (8) Impeller inspection process: Fig.19 As shown, the measuring stand 5 / micrometer 6 used for testing measures the runout of the fixed plate to be less than 0.3, and the runout of the steel shaft assembly 3 near the fixed plate to be less than 0.04.

[0120] The shape of the V-notch blade stamping die corresponds to the V-notch blade.

[0121] The stamping die 7 includes six processes: the first process 701 is punching positioning holes, the second process 702 is punching length positioning notches, the third process 703 is punching notches and breaking, the fourth process 704 is punching arc surfaces, the fifth process 705 is arc surface shaping, and the sixth process 706 is cutting.

[0122] Stamping die pressing process: when the raw material blank enters the first process, the positioning hole is punched, and the distance between the two positioning holes 707 is 7.7mm, which is the width of a blade 2; when entering the second process, the length positioning notch is punched, and the length between the two notches on the left and right is 180mm; when entering the third process, the notch shape and the fracture are punched out, and the distance between the two fractures is 7.7mm, forming a blade prototype; the blade prototype enters the fourth process and is punched into an arc-shaped blade; the arc-shaped blade enters the fifth process and continues to be reinforced; the blade enters the sixth process, and the fracture is completely cut off to form the final blade.

[0123] Embodiment 2:

[0124] The notch 201 is a concave notch 201 .

[0125] like Figure 1 and Figure 2As shown, the fixed plate 1 includes a front fixed plate 104 , a middle fixed plate 105 and a rear fixed plate 106 .

[0126] like Figure 8 As shown, the upper convex edge 202 and the lower bottom edge 203 of the concave notch 201 are equal in length.

[0127] The equipment used is a high-speed punch press and a punching die 7 for the blade 2 with a concave notch 201.

[0128] The shape of the punching die for the concave notch blade corresponds to the concave notch blade.

[0129] The rest is the same as in Example 1.

[0130] Embodiment 3:

[0131] The notch 201 is a wave-shaped notch 201 .

[0132] like Figure 1 and Figure 2 As shown, the fixed plate 1 includes a front fixed plate 104 , a middle fixed plate 105 and a rear fixed plate 106 .

[0133] like Fig. 9 As shown, the shape and size of the upper wave line 204 of the wavy notch 201 are equal to the shape and size of the lower wave line 205 , and the upper wave line 204 and the lower wave line 205 are in opposite directions, connected to each other, and cross-arranged.

[0134] The equipment used is a high-speed punching machine and a punching die 7 for the wave-shaped notch 201 blade 2.

[0135] The shape of the stamping die for the wave-shaped notched blade corresponds to the wave-shaped notched blade.

[0136] The rest is the same as in Example 1.

[0137] The embodiments described above are only preferred implementations of the present invention. Common 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 method for assembling a crossflow fan impeller, wherein the crossflow fan impeller is a barrel-shaped wheel-shaped body, comprising a fan blade and more than two fixed disks, wherein the fan blade comprises a plurality of blades, and a plurality of blade fixing slots are evenly arranged around the fixed disk, and the number of the blade fixing slots is equal to the number of blades; a reference hole is arranged in the middle of the fixed disk, and four key slots are evenly arranged around the reference hole; the blade fixing slot is a slot cut obliquely along the circumferential direction of the edge of the fixed disk, and the blade is a rectangular strip body, which is installed in the blade fixing slot to connect all the fixed disks together; the blade cross section is an arc cross section, the width of the blade arc cross section is more than 7 mm, the height of the blade arc cross section is more than 1 mm, and the arc radius of the blade arc cross section is more than 5 mm, and the characteristics are: The blade is provided with a notch on the outward side, and the blade between each two fixed disks includes more than 20 notches; the notch depth is 1.3-1.7 mm, and the notch width is 1.8-2.2 mm; the notch is a V-shaped notch, a concave notch or a wavy notch, and the notch angle of the V-shaped notch is 65-73°; The assembly method of the crossflow fan impeller includes the following steps: (1) Raw material preparation process: the thickness of the raw material blank is 0.35 mm, and the width of the raw material blank is 197±0.3 mm; (2) Blade forming and cutting process: The equipment used is a high-speed punch press and a stamping die; the stamping die includes a V-notch blade stamping die, a concave notch blade stamping die and a wavy notch blade stamping die; The length of the cut blade is 180 mm, the width of the blade arc section is 7.7 mm, and the height of the blade arc section is 1.8 mm; (3) Impeller assembly process: ①Select the corresponding 3 fixed plates and 24 blades and place them neatly on the workbench; ②Insert the blades into the three fixing plates one by one through the fixing plate slots until the fixing plate slots are filled; ③Separate the fixing plates along the blades so that the spacing between the fixing plates meets the design requirements; ④ Check the blades for any uneven lengths, and replace them if necessary; (4) Impeller riveting process: ① The tooling consists of a roller frame, a mandrel, a pneumatic clamping switch and a tooling locking screw. Insert the impeller vertically into the mandrel, put on the tooling locking screw, and press the pneumatic clamping switch to fix the blades neatly; ②Including the impeller rolling riveting machine, start the impeller rolling riveting machine, use the rubber block to move the fixed plate and adjust it to the center of the rolling riveting cutter; ③ Press the cutter on the machine and rivet the impeller to form a combined impeller; ④ Loosen the fixing plate, loosen the tooling screws, take out the parts and put them into the turnover box; (5) Impeller cleaning process: ① It includes a cleaning frame and an ultrasonic cleaning tank. The impellers are placed vertically next to each other in the cleaning frame, and the cleaning frame is placed in the ultrasonic cleaning tank as a whole; ② Including an ultrasonic cleaning machine, adjust the ultrasonic parameters according to the parameter table for ultrasonic cleaning, the cleaning time is 1 minute, and the rinsing time is 1 minute; ③Including a rinsing tank, lift the cleaning frame to filter the cleaning liquid and put it into the rinsing tank for rinsing; ④ Lift the cleaning frame, put it into the electric thermostatic box, adjust the box temperature to 100°C, and perform drying and dehydration treatment. The drying temperature is 100±5°C and the drying time is 10min; ⑤ Take out the dried impeller from the cleaning frame and place it neatly in the turnover box; (6) Steel shaft riveting process: ① Prepare the impeller and steel shaft assembly, and confirm the rotation direction of the impeller according to the drawing; ②Including an open tilting punch press and its punch press die, placing the steel shaft assembly and the impeller into the punch press die as required; ③Start the punch press and complete the punching; Inspection: Insert the shaft rubber into the hole of the front fixed plate and place it on the measuring stand. Use a dial indicator to check whether the radial runout of the steel shaft is within 0.06mm according to the requirements of the drawing; (7) Shaft rubber assembly process: insert the shaft rubber into the front fixed plate of the combined impeller; (8) Impeller inspection process: ①Including measuring stand and dial indicator, put the impeller component into the measuring stand, adjust the dial indicator to the measured part of the impeller, rotate the combined impeller, and record the measured value of each measured point; ② Including copper rod, when the measured value exceeds the process technical requirements, use the copper rod to gently tap the fixed plate until the measured value meets the process technical requirements; ③Take out the impeller and place them in the turnover box in order.

2. The method for assembling a crossflow fan impeller according to claim 1, characterized in that: The impeller comprises three fixed disks and 24 blades. The three fixed disks are a front fixed disk, a middle fixed disk and a rear fixed disk. 24 blade fixing slots are evenly arranged around the fixed disks.

3. The method for assembling a crossflow fan impeller according to claim 1, characterized in that: The width of the blade arc section is 7.7 mm, the height of the blade arc section is 1.8 mm, and the arc radius of the blade arc section is 5.5 mm.

4. The method for assembling a crossflow fan impeller according to claim 1, characterized in that: The blades between every two fixed disks include 25 notches, the notch depth is 1.5 mm, and the blade notch width is 2 mm.

5. The method for assembling a crossflow fan impeller according to claim 1, characterized in that: The V-shaped notch has a V-shaped notch angle of 68°.

6. The method for assembling a crossflow fan impeller according to claim 1, characterized in that: The upper convex edge and the lower bottom edge of the concave notch are equal in length.

7. The method for assembling a crossflow fan impeller according to claim 1, characterized in that: The shape and size of the upper wave line of the wavy notch are equal to the shape and size of the lower wave line, and the upper wave line and the lower wave line are in opposite directions, connected to each other, and cross-arranged.

8. The method for assembling a crossflow fan impeller according to claim 1, characterized in that: The specific technical requirements of each process are as follows: (1) Raw material preparation process: The raw material used is alloy aluminum strip, and the material grade is 3003; (2) Blade forming and cutting process: Inspection specification: Blade length and blade width are measured with a 0.02 / 200mm caliper and collected with a blade collector; (3) Impeller assembly process: Key points of process control: uniform spacing between fixed disks and alignment of process holes of fixed disks; (4) Impeller rolling riveting process: The impeller rolling riveting machine model is HQ-500-C, and the tooling number is GL45.178Z-01-B2; the process control requirements are that the impeller is firmly riveted without looseness, and the outer diameter of the fixed plate after rolling riveting and the 16mm hole of the fixed plate have a runout of less than 0.3mm; Inspection: Use a 0.02 / 200mm caliper to measure the outer diameter of the combined impeller, roll the 24-slot fixed plate to a diameter of 60.4±0.1mm, and use a measuring seat / dial indicator to measure the impeller runout to be less than 0.3mm; the impeller product model is GL60×180, that is, the impeller diameter is 60mm and the impeller length is 180mm; (5) Impeller cleaning process: The ultrasonic cleaning machine model is DS-1, the ultrasonic frequency is 85, and the ultrasonic power is 2KW; the cleaning frame is rectangular, and the internal size of the cleaning frame is 730×180mm; the detergent name is neutral detergent, and the solution concentration is 5%; (6) Steel shaft riveting process: The product model of the open tilting press is J23-6.3, and the impeller rotates counterclockwise; (7) Shaft rubber assembly process: The shaft rubber ring groove is completely and evenly placed in the reference hole of the fixed plate, and the stop key is placed in the keyway of the fixed plate; (8) Impeller calibration process: Use a dial indicator to measure the runout of the fixed plate to be less than 0.3 mm, and the runout of the steel shaft near the fixed plate to be less than 0.04 mm.

9. The method for assembling a crossflow fan impeller according to claim 1, characterized in that: The shape of the V-notch blade stamping die corresponds to the V-notch blade, the shape of the concave notch blade stamping die corresponds to the concave notch blade, and the shape of the wavy notch blade stamping die corresponds to the wavy notch blade; the stamping die includes six processes: the first process is to punch positioning holes, the second process is to punch length positioning notches, the third process is to punch notches and break, the fourth process is to punch arc surfaces, the fifth process is to shape arc surfaces, and the sixth process is to cut; the stamping die stamping process: when the raw material blank enters the first process, the positioning holes are punched, and the distance between the two positioning holes is 7.7mm, which is the width of a blade; when entering the second process, the length positioning notch is punched, and the length between the left and right notches is 180mm; when entering the third process, the notch shape and the fracture are punched out, and the distance between the two fractures is 7.7mm, forming a blade prototype; the blade prototype enters the fourth process and is punched into an arc-shaped blade; the arc-shaped blade enters the fifth process and continues to reinforce the arc-shaped blade; the blade enters the sixth process and the fracture is completely cut off to form a final blade.

Images