Fan impeller structure and sanitation vehicle fan

Abstract

The fan impeller comprises a front wheel cover, blades and a rear wheel disc, the front wheel cover and the rear wheel disc are coaxially arranged, the multiple blades are arranged between the front wheel cover and the rear wheel disc at equal intervals, the two sides of each blade are connected with the side wall of the front wheel cover and the side wall of the rear wheel disc respectively, an air inlet is formed in the center of the front wheel cover, and an air outlet is formed in the center of the rear wheel disc. The ends, extending towards the air inlet, of the blades are first ends, the ends, extending towards the edge of the front wheel cover, of the blades are second ends, and the second ends of the blades incline towards the rear portion of the rotating direction of the fan impeller. The fans are arranged at the two ends of the motor respectively, the size is reduced while the weight of the impeller is reduced by reducing the diameter of the impeller, the purposes of light weight and size reduction are achieved, the cruising ability of the new energy vehicle is improved, the structure of the fan impeller is optimally designed, the impeller can rotate at a high speed, and the service life of the new energy vehicle is prolonged. And the air volume, the total pressure and the power can meet the use requirements of the sanitation vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitation equipment, specifically a fan impeller structure and a sanitation vehicle fan. Background Art

[0002] Sanitation vehicles typically use centrifugal fans to exhaust air and assist in cleaning. Existing sanitation vehicles use a 9-26-7.6 model fan with a 760mm impeller diameter, which is both heavy and large. With the increasing popularity of new energy sanitation vehicles, existing fans are no longer sufficient to meet the demands of these vehicles, in order to reduce vehicle weight and increase driving range. Consequently, there is an urgent need to develop a compact, lightweight fan that delivers the air volume and pressure required by sanitation vehicles. Utility Model Content

[0003] To this end, the technical problem to be solved by the present invention is to provide a fan impeller structure and a sanitation vehicle fan that are small in size, light in weight, and can meet the air volume, wind pressure and endurance requirements of sanitation vehicles.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a fan impeller structure includes an impeller body, the impeller body includes a front wheel cover, blades and a rear wheel disc, the front wheel cover and the rear wheel disc are coaxially arranged, and a plurality of blades are arranged at equal intervals between the front wheel cover and the rear wheel disc, and the two sides of the blades are respectively connected to the side wall of the front wheel cover and the side wall of the rear wheel disc, an air inlet is opened at the center of the front wheel cover, an end of the blade extending toward the air inlet direction is a first end portion, and an end of the blade extending toward the edge of the front wheel cover is a second end portion, the second end portion of the blade is inclined toward the rear of the rotation direction of the impeller body, and the angle between the blade and the radial extension line of the impeller body is 30°-35°; the space between two adjacent blades forms an air duct, and the air inlet end of the air duct is fluid-connected with the air inlet.

[0005] In the above-mentioned fan impeller structure, the outer diameter of the impeller body is d, and on a plane perpendicular to the axis of the impeller body: the length of the blade is 0.3d-0.4d.

[0006] The above-mentioned fan impeller structure, on a plane perpendicular to the axis of the impeller body: the angle a between the connecting line between the second end and the center point of the rear wheel disc and the blade is 31°-34°.

[0007] In the above-mentioned fan impeller structure, 10-15 blades are arranged at equal intervals between the front wheel cover and the rear wheel disc.

[0008] In the above-mentioned fan impeller structure, the outer diameter of the impeller body is d, and the diameter of the air inlet is 0.45d-0.6d.

[0009] In the above-mentioned fan impeller structure, the width of the blade gradually narrows from the first end to the second end; the outer diameter of the impeller body is d, and on a plane parallel to the axis of the impeller body: the width of the first end of the blade is 0.1d-0.2d, and the width of the second end of the blade is 0.05d-0.1d.

[0010] In the above-mentioned fan impeller structure, the blades are straight blades.

[0011] A fan for a sanitation vehicle, comprising the above-mentioned fan impeller structure, fan housings being mounted on both ends of a motor, impeller bodies being rotatably mounted in both fan housings, power output shafts at both ends of the motor respectively extending into the two fan housings, and the power output shafts of the motor being transmission-connected to the impeller bodies;

[0012] An air suction hood is installed on one side of the fan housing, and the air suction hood is in fluid communication with the air inlet; an air exhaust hood is installed and in fluid communication with the circumferential wall surface of the fan housing.

[0013] The circumferential wall surface of the fan housing of the sanitation vehicle is sequentially divided into a first arc segment, a second arc segment, a third arc segment, and a fourth arc segment along the rotation direction of the impeller body. The end of the first arc segment is connected to one side of the exhaust hood, and the end of the fourth arc segment is connected to the other side of the exhaust hood. The radii of the first arc segment, the second arc segment, the third arc segment, and the fourth arc segment decrease in sequence.

[0014] The first center point of the first arc segment, the second center point of the second arc segment, the third center point of the third arc segment, and the fourth center point of the fourth arc segment are connected in pairs to form a square, the center point of the square coincides with the center point of the impeller body, the diameter of the impeller body is d, and the width of the square is 0.055d-0.075d;

[0015] The radius of the first arc segment is 0.73d-0.79d, the radius of the second arc segment is 0.63d-0.72d, the radius of the third arc segment is 0.59d-0.65d, and the radius of the fourth arc segment is 0.52d-0.58d; the thickness T of the fan casing is 0.25d-0.45d.

[0016] The above-mentioned sanitation vehicle fan has circular holes on both sides of the fan casing, a first sealing plate is installed on one side vertical wall of the fan casing, the end of the motor is fixedly connected to the first sealing plate, a transmission fixing hole is opened on the rear wheel disc of the impeller body, and a guide cone head is fixedly connected in the transmission fixing hole, the tip of the guide cone head is set towards the air inlet, and the guide cone head is coaxially fixedly connected to the transmission shaft, the other end of the transmission shaft passes through the first sealing plate and is coaxially fixedly connected to the power output end of the motor; a second sealing plate is installed on the other side vertical wall of the fan casing, and a guide cylinder is installed on the second sealing plate, the suction hood is fixedly installed on the second sealing plate and is fluid-connected with the guide cylinder, and a connecting ring is fixedly connected to the air inlet on the front wheel cover, the end of the guide cylinder is inserted into the connecting ring, and the inner diameter of the connecting ring is clearance-matched with the outer diameter of the guide cylinder.

[0017] The technical solution of the utility model has achieved the following beneficial technical effects:

[0018] 1. By setting fans at both ends of the motor and reducing the impeller diameter, the weight of the impeller is reduced while reducing the volume, achieving the goals of lightweighting and reducing size, which is conducive to improving the endurance of new energy vehicles. The structure of the fan impeller is optimized and designed, and the impeller can achieve high-speed rotation. The air volume, total pressure and power can meet the use requirements of sanitation vehicles.

[0019] 2. By optimizing the angle, length and density of the blades, the three design parameters achieve the best coordination, thereby improving the operating efficiency of the fan, which is conducive to reducing energy consumption, meeting the air volume and air pressure requirements of new energy sanitation vehicles, and achieving size reduction and weight reduction, thereby improving the endurance of sanitation vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective three-dimensional structural diagram of the fan impeller structure of the utility model;

[0021] Figure 2 A schematic diagram of the front cross-sectional structure of the fan impeller structure of the utility model;

[0022] Figure 3 A schematic side cross-sectional view of the fan impeller structure of the utility model;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of a single fan of a sanitation vehicle fan of the utility model;

[0024] Figure 5 A schematic side cross-sectional view of the utility model's sanitation vehicle fan;

[0025] Figure 6A schematic diagram of the front cross-sectional structure of the utility model sanitation vehicle fan;

[0026] Figure 7 A side sectional view of the utility model sanitation vehicle fan;

[0027] Figure 8 A schematic diagram of the front structure of the fan housing of the utility model;

[0028] Figure 9 A schematic side structural diagram of a fan casing of the present invention.

[0029] Reference numerals in the figure are as follows: 1-fan housing; 101-first sealing plate; 102-second sealing plate; 103-first arc segment; 104-second arc segment; 105-third arc segment; 106-fourth arc segment;

[0030] 2-impeller body; 3-air suction hood; 4-air exhaust hood; 5-drive shaft; 6-front wheel cover; 7-rear wheel disc; 8-blades; 81-first end; 82-second end; 9-air inlet; 10-drive fixing hole; 11-air duct; 12-guide cone head; 13-connecting ring; 14-guide tube; 15-motor. DETAILED DESCRIPTION

[0031] Example 1

[0032] The fan impeller structure in this embodiment is as follows: Figure 1-2 As shown, it includes an impeller body 2, which includes a front wheel cover 6, blades 8 and a rear wheel disc 7. The front wheel cover 6 and the rear wheel disc 7 are coaxially arranged, and a plurality of blades 8 are evenly spaced between the front wheel cover 6 and the rear wheel disc 7. The two sides of the blades 8 are respectively connected to the side walls of the front wheel cover 6 and the side walls of the rear wheel disc 7. An air inlet 9 is opened in the center of the front wheel cover 6. The end of the blade 8 extending toward the air inlet 9 is a first end 81, and the end of the blade 8 extending toward the edge of the front wheel cover 6 is a second end 82. The second end 82 of 8 is inclined toward the rear in the rotation direction of the impeller body 2; the space between two adjacent blades 8 forms an air duct 11, and the air inlet end of the air duct 11 is fluidly connected to the air inlet 9; the width of the blade 8 gradually narrows from the first end 81 to the second end 82, and the width ratio of the first end 81 to the second end 82 is 1:0.4-1:0.7; the distance between two adjacent blades 8 gradually increases from the first end 81 to the second end 82; the length of the blade 8 is 0.2-0.5 times the outer diameter of the impeller body 2.

[0033] The outer diameter of the impeller body 2 is d. In this embodiment, the outer diameter of the impeller body 2 is 500 mm. On a plane perpendicular to the axis of the impeller body 2: the length of the blade 8 is 0.3d-0.4d, and the length of the blade 8 ranges from 155 to 195 mm. The angle a between the connecting line between the second end 82 and the center point of the rear wheel disc 7 and the blade 8 is 31°-34°, preferably 33°; the diameter of the air inlet 9 is 0.5d-0.6d, and the diameter of the air inlet 9 ranges from 255 to 265 mm. The width of the first end 81 of the blade 8 is 0.1d-0.2d, preferably 45-50mm, that is, the distance between the edge positions of the front wheel cover 6 and the rear wheel disc 7 is 45-50mm, that is, the width of the air outlet position of the air duct 11 is 45-50mm, and the width of the second end 82 of the blade 8 is 0.05d-0.1d, preferably 80-85mm, that is, the distance between the rear wheel disc 7 and the air inlet 9 on the front wheel cover 6 is 80-85mm. The blade 8 is a straight blade, and the number of the blades 8 is 10-15, preferably 13.

[0034] The maximum speed of a conventional fan is generally 2900 rpm. The fan impeller structure in this embodiment is optimized with respect to the angle, length and relative distance between adjacent blades 8. The outer diameter of the impeller body 2 is 500 mm, the blades 8 have an inclination angle of 33°, a length of 155-195 mm, and 13 straight blades. The maximum speed is 6000-6500 rpm, and the air volume can reach 5000-6000 m 3 / h, adopting a dual-fan form with fans installed on both sides of the motor 15, under the conditions of the same fan size, speed and air supply volume, the fan efficiency can be effectively improved by 5%, and the fan flow, total pressure and power can meet the use requirements of sanitation vehicles.

[0035] Example 2

[0036] The fan of the sanitation vehicle in this embodiment adopts the fan impeller structure of embodiment 1, such as Figure 4 、 Figure 5 , a fan casing 1 is installed on both ends of the motor 15, and an impeller body 2 is rotatably installed in the two fan casings 1. The power output shafts at both ends of the motor 15 extend into the two fan casings 1 respectively, and the power output shaft of the motor 15 is transmission connected to the impeller body 2; an air suction hood 3 is installed on one side of the fan casing 1, and the air suction hood 3 is fluidically connected to the air inlet 9; an exhaust hood 4 is installed and connected on the circumferential wall surface of the fan casing 1.

[0037] By setting up dual fans and optimizing the fan impellers, the air volume and air pressure requirements of new energy sanitation vehicles are met while also reducing size and weight, thereby improving the vehicle's endurance.

[0038] like Figure 8-9 As shown, the circumferential wall surface of the fan housing 1 is a first arc segment 103, a second arc segment 104, a third arc segment 105 and a fourth arc segment 106 in sequence along the rotation direction of the impeller body 2. The end of the first arc segment 103 is connected to one side of the exhaust hood 4, and the end of the fourth arc segment 106 is connected to the other side of the exhaust hood 4. The first arc segment 103, the second arc segment 104, the third arc segment 105 and the fourth arc segment 106 are connected tangentially in sequence.

[0039] The first center point 1-1 of the first arc segment 103, the second center point 1-2 of the second arc segment 104, the third center point 1-3 of the third arc segment 105, and the fourth center point 1-4 of the fourth arc segment 106 are connected in pairs to form a square, and the center point of the square coincides with the center point of the impeller body 2. The diameter of the impeller body 2 is d, and the width of the square is 0.055d-0.075d, specifically 27.5mm-37.5mm.

[0040] The radii of the first arc segment 103, the second arc segment 104, the third arc segment 105 and the fourth arc segment 106 decrease in sequence. Specifically, the radius R1 of the first arc segment 103 is 0.73d-0.79d, the radius R2 of the second arc segment 104 is 0.63-0.72d, the radius R3 of the third arc segment 105 is 0.59d-0.65d, and the radius R4 of the fourth arc segment 106 is 0.63d-0.72d. The diameter R4 is 0.52d-0.58d; the thickness T of the fan casing 1 is 0.25-0.45d. Specifically, the radius of the first arc segment 103 is 370-390mm, the radius of the second arc segment 104 is 320-360mm, the radius of the third arc segment 105 is 295-320mm, the radius of the fourth arc segment 106 is 260-285mm, and the thickness of the fan casing 1 is 160-175mm.

[0041] like Figure 6-7As shown, circular holes are provided on both sides of the fan housing 1, a first sealing plate 101 is installed on one side wall of the fan housing 1, the end of the motor 15 is fixedly connected to the first sealing plate 101, a transmission fixing hole 10 is provided on the rear wheel disc 7, a guide cone head 12 is fixedly connected to the transmission fixing hole 10, the tip of the guide cone head 12 is arranged toward the air inlet 9, a transmission shaft 5 is coaxially fixedly connected to the guide cone head 12, and the other end of the transmission shaft 5 passes through the first sealing plate 101. It is coaxially fixedly connected to the power output end of the motor 15; a second sealing plate 102 is installed on the vertical wall on the other side of the fan casing 1, and a guide tube 14 is installed on the second sealing plate 102. The air suction hood 3 is fixedly installed on the second sealing plate 102 and is fluid-connected with the guide tube 14. A connecting ring 13 is coaxially fixedly connected to the air inlet 9 on the front wheel cover 6, and the end of the guide tube 14 is inserted into the connecting ring 13, and the inner diameter of the connecting ring 13 is gap-matched with the outer diameter of the guide tube 14.

[0042] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the claims of this patent application.

Claims

1. A fan impeller structure, comprising an impeller body (2), characterized in that: The impeller body (2) includes a front wheel cover (6), blades (8) and a rear wheel disc (7). The front wheel cover (6) and the rear wheel disc (7) are coaxially arranged. A plurality of blades (8) are arranged at equal intervals between the front wheel cover (6) and the rear wheel disc (7). Both sides of the blades (8) are connected to the side walls of the front wheel cover (6) and the side walls of the rear wheel disc (7) respectively. An air inlet (9) is opened at the center of the front wheel cover (6). The blades (8) are directed toward the air inlet (9). The end extending toward the front wheel cover (6) is a first end (81), and the end of the blade (8) extending toward the edge of the front wheel cover (6) is a second end (82). The second end (82) of the blade (8) is inclined toward the rear of the rotation direction of the impeller body (2), and the angle between the blade (8) and the radial extension line of the impeller body (2) is 30°-35°; the space between two adjacent blades (8) forms an air duct (11), and the air inlet end of the air duct (11) is fluid-conducted with the air inlet (9).

2. The fan impeller structure according to claim 1, characterized in that: The outer diameter of the impeller body (2) is d, and on a plane perpendicular to the axis of the impeller body (2), the length of the blade (8) is 0.3d-0.4d.

3. The fan impeller structure according to claim 1, characterized in that: On a plane perpendicular to the axis of the impeller body (2), the angle a between the connecting line between the second end (82) and the center point of the rear wheel disc (7) and the blade (8) is 31°-34°.

4. The fan impeller structure according to claim 1, characterized in that: 10-15 blades (8) are arranged at equal intervals between the front wheel cover (6) and the rear wheel disc (7).

5. The fan impeller structure according to claim 1, characterized in that: The outer diameter of the impeller body (2) is d, and the diameter of the air inlet (9) is 0.45d-0.6d.

6. The fan impeller structure according to claim 1, characterized in that: The width of the blade (8) gradually narrows from the first end (81) to the second end (82); the outer diameter of the impeller body (2) is d, and on a plane parallel to the axis of the impeller body (2): the width of the first end (81) of the blade (8) is 0.1d-0.2d, and the width of the second end (82) of the blade (8) is 0.05d-0.1d.

7. The fan impeller structure according to any one of claims 1 to 6, characterized in that: The blade (8) is a straight blade.

8. Sanitation vehicle fan, characterized in that: The fan impeller structure comprises the fan impeller structure according to any one of claims 1 to 7, wherein a fan housing (1) is mounted on both ends of a motor (15), an impeller body (2) is rotatably mounted in the two fan housings (1), power output shafts at both ends of the motor (15) extend into the two fan housings (1) respectively, and the power output shaft of the motor (15) is transmission-connected to the impeller body (2); An air suction hood (3) is installed on one side of the fan housing (1), and the air suction hood (3) is in fluid communication with the air inlet (9); an air exhaust hood (4) is installed and in fluid communication with the circumferential wall surface of the fan housing (1).

9. The sanitation vehicle fan according to claim 8, characterized in that: The circumferential wall surface of the fan housing (1) is sequentially formed into a first arc segment (103), a second arc segment (104), a third arc segment (105) and a fourth arc segment (106) along the rotation direction of the impeller body (2); the end of the first arc segment (103) is connected to one side of the exhaust hood (4), and the end of the fourth arc segment (106) is connected to the other side of the exhaust hood (4); the radii of the first arc segment (103), the second arc segment (104), the third arc segment (105) and the fourth arc segment (106) decrease in sequence; The first center point (1-1) of the first arc segment (103), the second center point (1-2) of the second arc segment (104), the third center point (1-3) of the third arc segment (105), and the fourth center point (1-4) of the fourth arc segment (106) are connected in pairs to form a square, the center point of the square coincides with the center point of the impeller body (2), the diameter of the impeller body (2) is d, and the width of the square is 0.055d-0.075d; The radius R1 of the first circular arc segment (103) is 0.73d-0.79d, the radius R2 of the second circular arc segment (104) is 0.63d-0.72d, the radius R3 of the third circular arc segment (105) is 0.59d-0.65d, and the radius R4 of the fourth circular arc segment (106) is 0.52d-0.58d; and the thickness T of the fan housing (1) is 0.25d-0.45d.

10. The sanitation vehicle fan according to claim 9, characterized in that: Circular holes are provided on both sides of the fan housing (1), a first sealing plate (101) is installed on one side wall of the fan housing (1), the end of the motor (15) is fixedly connected to the first sealing plate (101), a transmission fixing hole (10) is provided on the rear wheel disc (7) of the impeller body (2), a guide cone head (12) is fixedly connected in the transmission fixing hole (10), the tip of the guide cone head (12) is arranged toward the air inlet (9), a transmission shaft (5) is coaxially fixedly connected to the guide cone head (12), and the other end of the transmission shaft (5) passes through the first sealing plate (10). 1) and is coaxially fixedly connected to the power output end of the motor (15); a second sealing plate (102) is installed on the other side wall of the fan housing (1), a guide tube (14) is installed on the second sealing plate (102), the air suction cover (3) is fixedly installed on the second sealing plate (102) and is fluid-conducted with the guide tube (14), a connecting ring (13) is coaxially fixedly connected to the air inlet (9) on the front wheel cover (6), the end of the guide tube (14) is inserted into the connecting ring (13), and the inner diameter of the connecting ring (13) is clearance-matched with the outer diameter of the guide tube (14).

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