CN220365738U - Assembled cross flow multi-blade fan - Google Patents
Assembled cross flow multi-blade fan Download PDFInfo
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- CN220365738U CN220365738U CN202322014670.6U CN202322014670U CN220365738U CN 220365738 U CN220365738 U CN 220365738U CN 202322014670 U CN202322014670 U CN 202322014670U CN 220365738 U CN220365738 U CN 220365738U
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- fan impeller
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- blades
- impeller
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- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005493 welding type Methods 0.000 description 3
- 241000209149 Zea Species 0.000 description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 235000005822 corn Nutrition 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model relates to an assembled cross flow multi-blade fan, which comprises a fan shaft, a left fan impeller and a right fan impeller; the left fan impeller and the right fan impeller are coaxially and fixedly connected to the fan shaft; the left fan impeller and the right fan impeller are composed of a plurality of axially arranged blade fixing plates and a plurality of blades detachably inserted and fastened on the plurality of blade fixing plates, and the plurality of blades are uniformly distributed along the circumferential direction and spirally extend along the axial direction; from left to right, the direction of rotation of the blade on the left fan impeller is anticlockwise, the direction of rotation of the blade on the right fan impeller is clockwise, and the rotation angles of the blade on the left fan impeller and the right fan impeller are equal, so that the left fan impeller and the right fan impeller jointly form a V-shaped fan blade arrangement structure. When the air suction and exhaust device is used for sucking and exhausting air, the vortex effect with opposite directions is generated, the air inlet quantity of the air suction and the air outlet quantity of the air exhaust are improved, and the blades are directly clamped on the blade fixing disc, so that the dynamic balance effect of the fan assembly is good, and the running stability of the fan is ensured.
Description
Technical Field
The utility model belongs to the field of agricultural machinery, relates to a cleaning system in a corn kernel harvester, and particularly relates to an assembled cross flow multi-blade fan.
Background
In the cleaning system of the existing corn kernel harvester, the application of the cross flow fan is common. The installation shaping mode, the lateral flow fan has two kinds of welding type and assembly type, and wherein the welding type fan occupies than great, and the structural feature of welding type is: the blades are fixed on the blade fixing disc in a welding mode, are mostly 4-12 blades, and have the characteristics of simple manufacture, low process requirements, high maintenance difficulty and the like. And the assembled cross flow multi-blade fan occupies smaller area. The blades are mostly plate-type blades, and are mostly fastened by bolts. The dynamic balance quantity is not controlled under the influence of the self weight difference of the fastener, and the dynamic balance quantity difference of different assemblies is large; in addition, the disassembly and assembly can not be quickly disassembled and replaced by means of a fastening tool; the air inlet is not smooth, the air supply is not uniform and the like due to the limitation of the blade form and the fastening mode.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the assembled cross flow multi-blade fan which has good balance, can realize large air volume and stable output, thereby effectively improving the cleaning effect and efficiency of air-screening type seeds and is convenient to install and disassemble.
The above object of the present utility model is achieved by the following technical solutions:
an assembled crossflow multi-blade fan, characterized in that: the device comprises a fan shaft, a left fan impeller and a right fan impeller; the left fan impeller and the right fan impeller are coaxially and fixedly connected to the fan shaft; the left fan impeller and the right fan impeller are composed of a plurality of axially arranged blade fixing plates and a plurality of blades detachably inserted and fastened on the blade fixing plates, and the blades are uniformly distributed along the circumferential direction and spirally extend along the axial direction; from left to right direction, the direction of turning of blade on the left fan impeller is anticlockwise, the direction of turning of blade on the right fan impeller is clockwise, and the rotation angle of blade on the left and right fan impeller equals, makes left fan impeller and right fan impeller form V type fan blade arrangement structure jointly.
Moreover, the blade fixing disc is of a PSU material integrated structure; comprises a tray body, a reinforcing rib, a hub, a lock tongue, a clamping groove and a pin hole; the disk body is circular, the center of the disk body is a hub, the length of the hub is larger than the thickness of the disk body, a key groove is formed in an inner hole of the hub, and a flat key is arranged in the key groove to form positioning fit along a circumference square with the fan blade shaft; a pin hole is formed in the hub and located on the outer side of the disc body, the pin hole is a through hole, and a locating pin is arranged in the pin hole in a penetrating mode to fix the blade fixing disc at a set position on the fan shaft; a plurality of clamping grooves with the same shape are uniformly distributed at the edge part close to the tray body along the circumferential direction, the clamping grooves are through grooves, the outer ends of the clamping grooves are furled, the inner sides of the outer ends of the clamping grooves form clamping point parts for positioning one ends of the blades, the inner ends of the clamping grooves are connected with lock bolts extending into the clamping grooves, and positioning notches for positioning the other ends of the blades are formed in one sides of the end parts of the lock bolts, corresponding to the clamping point parts; the blades are arranged in the corresponding clamping grooves in a penetrating manner, the outer ends of the blades form positioning contact with the clamping point parts, and the inner ends of the blades form positioning contact with the positioning gaps at the ends of the lock bolts, so that the blades are detachably clamped and fixed on the blade fixing disc; a plurality of reinforcing ribs are uniformly distributed on the end face of the disc body along the circumferential direction outside the hub, and the outer ends of the reinforcing ribs extend to the positions contacting with the outer side face of the inner end of the corresponding clamping groove part.
And through holes which play roles in weight reduction and counterweight are uniformly distributed on the tray body.
Moreover, the blade adopts an aluminum alloy arc blade.
The utility model has the advantages and positive effects that:
1. the utility model adopts the combination form of the left fan impeller and the right fan impeller, the blades on the left fan impeller and the right fan impeller are spirally extended in opposite directions, and when the air suction and the exhaust are carried out, the vortex effect in opposite directions is generated, and the air inlet quantity of the air suction and the air outlet quantity of the air exhaust are improved, so that the air screen type seed cleaning effect and the efficiency can be effectively improved.
2. According to the utility model, the clamping grooves are formed in the blade fixing plate, the lock tongue is arranged in the clamping grooves, the outer ends of the blades are clamped and fixed through the clamping point parts at the outer end parts of the clamping grooves, the inner ends of the blades are clamped and fixed through the positioning notches at the end parts of the lock tongue, the blades are firmly fixed on the blade fixing plates through the elastic deformation acting force of the lock tongue and the micro deformation direction acting force of the blades along the axial direction, and the blades can be fixedly installed and detached only by pushing the lock tongue blades when the blades are installed and detached.
3. Compared with the prior art that the blades are fastened and installed through screws, the utility model avoids uncontrolled dynamic balance of the fan caused by the influence of the weight difference of the fasteners, and can achieve better dynamic balance performance through the uniform installation of the blades.
Drawings
FIG. 1 is a top view of the overall structure of the present utility model;
FIG. 2 is a top view of the left impeller of the present utility model;
FIG. 3 is a left side view of the left impeller of the present utility model;
FIG. 4 is a partial schematic view of the engagement of the latch and tongue with the blade on the fan mounting plate of FIG. 3;
FIG. 5 is a top view of the right impeller of the present utility model;
FIG. 6 is a right side view of the right impeller of the present utility model;
FIG. 7 is a front view of the impeller retention disc of the present utility model (illustrated as a blade retention disc on a right fan impeller);
FIG. 8 is a top view of the impeller retention disc of the present utility model (illustrated as a blade retention disc on a right fan impeller);
fig. 9 is a schematic view of the installation of the assembled crossflow multi-blade blower of the present utility model in a cleaning system.
Detailed Description
The structure of the present utility model will be further described by way of examples with reference to the accompanying drawings. It should be noted that the present embodiments are illustrative and not restrictive.
Referring to fig. 1-8, the utility model is an assembled cross-flow multi-blade fan, which comprises: the multi-blade fan mainly comprises a fan shaft 3, a left fan impeller 1 and a right fan impeller 2. The left fan impeller and the right fan impeller are coaxially connected to the fan shaft, the right end of the left fan impeller is in non-contact with the left end of the right fan impeller, and the left fan impeller and the right fan impeller are fastened to the fan shaft only by the positioning pin.
The left fan impeller and the right fan impeller are respectively composed of a plurality of blade fixing discs which are arranged along the axial direction and a plurality of blades (36 blades are preferably adopted in the utility model) which are assembled on the blade fixing discs, the blade fixing discs of the left fan impeller and the right fan impeller are respectively marked with 1.1 and 2.1 in the attached drawings, and the blades of the left fan impeller and the right fan impeller are respectively marked with 1.2 and 2.2 in the attached drawings. The blades are uniformly distributed along the circumferential direction and spirally extend along the axial direction. From left to right, the direction of rotation of the blade on the left fan impeller is anticlockwise, the direction of rotation of the blade on the right fan impeller is clockwise, namely the direction of rotation of the blade on the left fan impeller is opposite to the direction of rotation of the blade on the right fan impeller, the rotation angles are equal, and the rotation angle size is 5+/-0.5 degrees, so that the left fan impeller and the right fan impeller jointly form a V-shaped fan blade arrangement structure.
The blade is clamped on the blade fixing disc, and the blade adopts an aluminum alloy arc-shaped blade. The structural feature of the blade fixing disc is: the blade fixing disc is of a PSU integrated structure. Mainly comprises a disc body 2.1.1, a reinforcing rib 2.1.3, a hub 2.1.2, a lock tongue 2.1.5, a clamping groove 2.1.4, a pin hole and other parts. The disk body is circular, is the base member of blade fixed disk, and thickness is 2-10mm, preferably 4mm. The center of the disk body is a hub, the length of the hub is greater than the thickness of the disk body, a key groove is formed in an inner hole of the hub, and a pin hole 2.1.7 is formed in the outer side of the disk body on the hub. The hub is adapted to be mounted to the fan shaft in driving connection with the fan shaft in a circumferential direction by means of a flat key mounted in a key slot. The pin hole is a through hole and is used for penetrating the locating pin and fixing the blade fixing disc at a set position on the fan shaft. The edge part close to the disc body is uniformly provided with a plurality of clamping grooves with the same shape along the circumferential direction, the clamping grooves are through grooves, and the thickness (about 8 mm) of the clamping groove part is larger than that of the disc body so as to ensure that the clamping contact area with the blades is enough. The outer end of the clamping groove is furled, and a clamping point part 2.1.6 for positioning one end of the blade is formed on the inner side of the outer end of the clamping groove, and the clamping point part is a right-angle clamping angle in the drawing. The inner end of the clamping groove is connected with a lock tongue extending into the clamping groove, the lock tongue can elastically deform in the clamping groove under the action of external force, one side of the end part of the lock tongue corresponding to the clamping point part is provided with a positioning notch for positioning the other end of the blade, and the positioning notch can be a right-angle notch shown in the attached drawing but is not limited to the right-angle notch. The blades are clamped and fixed on the blade fixing disc through the clamping point parts and the positioning gaps. A plurality of reinforcing ribs are uniformly distributed on the end face of the disc body along the circumferential direction outside the hub, the outer ends of the reinforcing ribs extend to the positions in contact with the outer side face of the inner end of the corresponding clamping groove part, and the structural strength of the disc body and the hub is improved by the reinforcing ribs. Through holes which are uniformly distributed and play roles of weight reduction and counterweight can be added on the tray body as required.
The plurality of blade fixing discs of the left fan impeller and the right fan impeller are arranged in a staggered mode at a certain angle in sequence along the circumferential direction, so that the blades are spirally arranged along the axial direction after being installed. If the blades are arranged in parallel along the axial direction, the blades are fixed only by the lock tongue on the fixed disc, and the stability is insufficient. The blade is deflected to a certain extent, a certain helix angle is formed through micro elastic deformation, and the deflection force of the blade is reacted to the corresponding lock tongue, so that the stability of the lock tongue to the blade is ensured.
The blades on the left fan impeller and the right fan impeller are in spiral arrangement which are oppositely arranged, and when the air suction and exhaust are carried out, vortex effects with opposite directions are generated, so that the air inlet quantity of the air suction and the air outlet quantity of the air exhaust are improved.
The mounting and dismounting method of the assembled cross flow multi-blade fan comprises the following steps:
during installation, the blade passes the draw-in groove on the blade fixed disk, the outer end of blade is located the draw-in point portion of draw-in groove, but not with the chucking of draw-in point portion, the inner of blade is close to the tip of spring bolt, but the blade is movable state in the draw-in groove this moment, push vane towards the outer end direction of draw-in groove, make the outer end of blade and the draw-in point portion locate fit of draw-in groove, then push the spring bolt towards the direction of keeping away from the draw-in point portion, make the location breach on the spring bolt and the other end butt pressure of blade contact, loosen the spring bolt, through the resilience force of spring bolt, realize the card of blade on the blade fixed disk and install. When the blade is required to be disassembled, the lock tongue is continuously pushed in the direction away from the clamping point part, so that the inner end of the blade is separated from the positioning notch of the lock tongue to be in compression contact, and then the blade is broken off in the direction opposite to the pushing direction of the lock tongue, so that the blade can be disassembled from the clamping groove, and the installation, disassembly and washing of the blade can be conveniently realized.
The assembled cross flow multi-blade fan is an important component of an air screen type cleaning system, is positioned at the front part of the whole machine, behind a front axle 4 and below the front part of the cleaning screen, and mainly provides sufficient and uniform cleaning air for the cleaning system, and in the transition process of materials from a shaking plate/seed bearing plate 5 to a cleaning screen 6, heavy grains and light impurities realize wind screening by blowing out the light impurities obliquely upwards and fall outside the machine body, and meanwhile, the fan is arranged at the position A in FIG. 9.
Although the embodiments of the present utility model and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit of the utility model and the appended claims, and therefore the scope of the utility model is not limited to the embodiments and the disclosure of the drawings.
Claims (4)
1. An assembled crossflow multi-blade fan, characterized in that: the device comprises a fan shaft, a left fan impeller and a right fan impeller; the left fan impeller and the right fan impeller are coaxially and fixedly connected to the fan shaft; the left fan impeller and the right fan impeller are composed of a plurality of axially arranged blade fixing plates and a plurality of blades detachably inserted and fastened on the blade fixing plates, and the blades are uniformly distributed along the circumferential direction and spirally extend along the axial direction; from left to right direction, the direction of turning of blade on the left fan impeller is anticlockwise, the direction of turning of blade on the right fan impeller is clockwise, and the rotation angle of blade on the left and right fan impeller equals, makes left fan impeller and right fan impeller form V type fan blade arrangement structure jointly.
2. The assembled crossflow sirocco fan of claim 1, wherein: the blade fixing disc is of a PSU material integrated structure; comprises a tray body, a reinforcing rib, a hub, a lock tongue, a clamping groove and a pin hole; the disk body is circular, the center of the disk body is a hub, the length of the hub is larger than the thickness of the disk body, a key groove is formed in an inner hole of the hub, and a flat key is arranged in the key groove to form positioning fit along a circumference square with the fan blade shaft; a pin hole is formed in the hub and located on the outer side of the disc body, the pin hole is a through hole, and a locating pin is arranged in the pin hole in a penetrating mode to fix the blade fixing disc at a set position on the fan shaft; a plurality of clamping grooves with the same shape are uniformly distributed at the edge part close to the tray body along the circumferential direction, the clamping grooves are through grooves, the outer ends of the clamping grooves are furled, the inner sides of the outer ends of the clamping grooves form clamping point parts for positioning one ends of the blades, the inner ends of the clamping grooves are connected with lock bolts extending into the clamping grooves, and positioning notches for positioning the other ends of the blades are formed in one sides of the end parts of the lock bolts, corresponding to the clamping point parts; the blades are arranged in the corresponding clamping grooves in a penetrating manner, the outer ends of the blades form positioning contact with the clamping point parts, and the inner ends of the blades form positioning contact with the positioning gaps at the ends of the lock bolts, so that the blades are detachably clamped and fixed on the blade fixing disc; a plurality of reinforcing ribs are uniformly distributed on the end face of the disc body along the circumferential direction outside the hub, and the outer ends of the reinforcing ribs extend to the positions contacting with the outer side face of the inner end of the corresponding clamping groove part.
3. The assembled crossflow sirocco fan of claim 2, wherein: through holes for reducing weight and balancing weight are uniformly distributed on the tray body.
4. The assembled crossflow sirocco fan of claim 2, wherein: the blade adopts an aluminum alloy arc blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322014670.6U CN220365738U (en) | 2023-07-28 | 2023-07-28 | Assembled cross flow multi-blade fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322014670.6U CN220365738U (en) | 2023-07-28 | 2023-07-28 | Assembled cross flow multi-blade fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220365738U true CN220365738U (en) | 2024-01-19 |
Family
ID=89516532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322014670.6U Active CN220365738U (en) | 2023-07-28 | 2023-07-28 | Assembled cross flow multi-blade fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220365738U (en) |
-
2023
- 2023-07-28 CN CN202322014670.6U patent/CN220365738U/en active Active
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