CN211950969U - Fan assembly - Google Patents

Abstract

The utility model discloses a fan assembly, including the spiral case, pivot and impeller, the pivot is installed in the spiral case, and the cover is equipped with the impeller, the impeller includes the axle sleeve, the backplate, panel and polylith blade, the axle sleeve is fixed in the pivot through the cover that expands, the backplate with axle sleeve coaxial line is installed to axle sleeve one end, one side that the backplate was kept away from to the axle sleeve is equipped with the panel with axle sleeve coaxial line, panel middle part processing has the annular air inlet with axle sleeve coaxial line, polylith blade is the annular around axle sleeve circumference and evenly sets up, and the blade all along axle sleeve radial distribution, the blade is close to the axis and is close to the air inlet part and all processes the oblique angle, the oblique angle of processing encloses. The utility model discloses a change the blade of fan into with the axle sleeve radially align, make the blade move by traditional slope fan and change into perpendicular fan and move, process the oblique angle simultaneously on the blade, make a plurality of blades when the impeller rotates, form the cyclone for produce the negative pressure, increase the intake of air inlet.

Description

Fan assembly

Technical Field

The utility model relates to a fan technical field especially relates to a fan subassembly.

Background

In the field of shot blasting machines, a fan is one of the important devices. The fan is used for sucking out the scraps generated by shot blasting when the shot blasting machine works so as to reduce the impurity content in the steel shot and ensure the processing efficiency of the shot blasting machine.

However, the existing fan is difficult to generate the maximum air volume due to the design, so that the shot blasting machine needs to adopt a fan with stronger power and larger size in the using process, the fan occupies more volume of the shot blasting machine, the load is increased, the power consumption and production consumables of the shot blasting machine are increased, the shot blasting machine needs to continuously work for a long time, and finally the use cost is increased.

In view of the above, a great number of tests are carried out on the problem that the air volume of the fan with the same volume is not large enough, and redesign is carried out, so that the purpose of increasing the air volume of the fan is achieved.

Disclosure of Invention

An object of the utility model is to provide a fan subassembly, this fan subassembly makes the fan can also produce stronger wind-force under certain volume through improving the blade to satisfy shot-blasting machine's use.

The utility model aims at realizing through the following technical scheme:

the utility model provides a fan assembly, includes spiral case, pivot and impeller, and the pivot is installed in the spiral case to the cover is equipped with the impeller, the impeller includes axle sleeve, backplate, panel and polylith blade, the axle sleeve is fixed in the pivot through the cover that expands, the backplate with axle sleeve coaxial line is installed to axle sleeve one end, one side that the backplate was kept away from to the axle sleeve is equipped with the panel with axle sleeve coaxial line, panel middle part processing has the annular air inlet with axle sleeve coaxial line, the polylith blade is the annular around axle sleeve circumference and evenly sets up, and every blade all along the radial distribution of axle sleeve, every blade is close to the axis and is close to the air inlet part and all processes the oblique angle that is used for strengthening wind-force, the oblique angle of processing.

The diameter of the vortex cavity is gradually increased along the direction from the shaft sleeve to the panel.

The oblique angle that the blade was processed is triangle-shaped, and the oblique angle length that the blade is close to the axis is 1/3 ~ 2/3 of this length of side, and the oblique angle length that the blade is close to the panel is 1/3 ~ 2/3 of this length of side.

The length of the shaft sleeve is 1/4-1/2 of the side length of the blade close to the axis.

The back plate and the face plate are both circular, and the diameters of the face plate and the back plate are equal.

The radius size of the air inlet is equal to the vertical size from the oblique angle processing position of the blade to the axis.

The expansion sleeve comprises a spring head arranged between the shaft sleeve and the rotating shaft and an installation convex edge integrally formed with the spring head, key grooves aligned with the rotating shaft and the shaft sleeve are processed on the inner wall and the outer wall of the spring head, and installation holes fixedly connected with the end face of the shaft sleeve are processed on the end face of the installation convex edge.

The air duct in the volute gradually widens in a spiral shape along the rotation direction of the impeller.

The air outlet of the volute is further provided with a silencing pipeline, the inner wall of the silencing pipeline is provided with a silencing partition plate, and a silencing hole is processed in the silencing partition plate.

The embodiment of the utility model provides a fan subassembly has beneficial effect is:

(1) the blades of the fan are changed to be aligned with the shaft sleeve in the radial direction, so that the traditional inclined fanning is changed into vertical fanning when the blades fan air, the wind power can be increased rapidly, and meanwhile, oblique angles are processed on the blades at the air inlet, so that a vortex cavity formed by surrounding of a plurality of blades can form a cyclone when the impeller rotates, the cyclone is used for generating great negative pressure, the air inlet amount of the air inlet can be increased, and the purpose of enhancing the power of the fan is achieved;

(2) the expansion sleeve is arranged to connect the rotating shaft and the impeller, so that the vibration of the impeller generated at high speed is absorbed by the spring head on the expansion sleeve to achieve the aim of damping the impeller, the rotating stability of the impeller is improved, stronger wind power can be generated only when the impeller rotates stably, the effect of torsion generated by the rotating shaft due to the high-speed vibration of the impeller on the rotating shaft can be reduced, and the service life of the rotating shaft is prolonged;

(3) by processing the oblique angles on the blades, the weight of the center of the impeller can be reduced and the centrifugal force of the impeller can be increased when the impeller rotates, so that the impeller further rotates at a speed under the action of the centrifugal force, and more air volume is generated;

(4) the air duct gradually widened is arranged on the volute, so that the air flow can be increased, and the noise generated by too fast air speed is reduced;

(5) the air outlet end of the volute is connected with the silencing pipeline, so that noise pollution caused by the friction between wind and air can be greatly reduced.

Drawings

Fig. 1 is a first structural diagram of a fan assembly according to an embodiment of the present invention.

Fig. 2 is a second structural diagram of the fan assembly according to the embodiment of the present invention.

Fig. 3 is an embodiment of the present invention provides an internal structural schematic diagram of a fan assembly.

Fig. 4 is a first structural diagram of an impeller according to an embodiment of the present invention.

Fig. 5 is a second structural diagram of an impeller according to an embodiment of the present invention.

Fig. 6 is a sectional view of an impeller provided in an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a shaft sleeve according to an embodiment of the present invention.

Reference numerals: 1. a volute; 11. an air duct; 2. a rotating shaft; 3. a motor; 4. an impeller; 41. a shaft sleeve; 42. a back plate; 43. a panel; 44. a blade; 45. oblique angle; 46. an air inlet; 5. expanding the sleeve; 51. a spring head; 52. installing a convex edge; 53. a keyway; 54. mounting holes; 6. a sound-deadening duct; 61. a sound-deadening partition plate; 62. a silencing hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside" and "outside" are used for indicating the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the utility model is usually placed when using, and are only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The terms "substantially", "essentially", and the like are intended to indicate that the relative terms are not required to be absolutely exact, but may have some deviation. For example, "substantially parallel" does not merely mean absolute parallelism, and there is generally a certain deviation because absolute parallelism is difficult to achieve in actual production and operation. Therefore, "substantially parallel" includes the case where there is a certain deviation as described above, in addition to the absolute parallel.

In the description of the present invention, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be connected internally or indirectly. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

The fan assembly provided by the embodiment can be applied to the field of industrial dust removal, such as the field of fly ash production, the field of concrete manufacturing and building, the field of chemical synthesis and the like, and relates to the field of fans, the embodiment is mainly explained by being specifically applied to the field of surface shot blasting technology treatment, in particular to fans used on vehicle-mounted and mobile shot blasting machines, because the mobile shot blasting machine needs to suck out and filter scraps generated by steel shot processing, otherwise, the vehicle-mounted shot blasting machine needs to drag an exhaust pipe for processing, so that processing is inconvenient, the vehicle-mounted shot blasting machine needs fans with extremely strong output power, the existing fans cannot reach the use standard easily, if the use standard is reached, a plurality of fans or fans with larger volume or stronger power are needed for realization, and the production cost is increased or the load of the shot blasting machine is increased, thereby shortening the standby time of the shot blasting machine.

As shown in fig. 1 to 3, the fan assembly provided in this embodiment includes a spiral case 1, a rotating shaft 2, a motor 3 and an impeller 4, the rotating shaft 2 is installed in the spiral case 1, and is sleeved with the impeller 4, one end of the rotating shaft 2 penetrates through the spiral case 1 and is connected with the motor 3, and the rotating shaft 2 is driven by the motor 3 to drive the impeller 4 to rotate to drive air to flow, so that air in the blasting machine flows out.

Most of fan impeller structures used in the shot blasting machine are impellers formed by a plurality of arc-shaped blades which are obliquely arranged, the impeller structure is approximately the same as fan blades of the fan, the contact area of the impeller with the air of the blades is the largest when the impeller moves wind power, but the blades are arc-shaped and obliquely arranged, so that the impeller generates a small pushing force on the air when the impeller moves wind power, when the blades rotate, the wind power generated by cut air is gradually decomposed along the arc-shaped fan surfaces, the force pushed by the air is not strong enough, the fan is only suitable for a small shot blasting machine, and the small shot blasting machine is small in machining surface, and generated chips and dust are few.

In order to solve the problems, the blade of the impeller is improved, the blade is modified into an inclined straight blade which is approximately the same as the impeller of the blower, at the moment, the wind power generated by the impeller is slightly increased, and after analysis, a part of air is still decomposed by the inclined surface of the inclined straight blade.

In order to solve the problem that air is decomposed, the impeller is improved again, the blades are modified into arc-shaped blades which are vertically installed, the wind power generated by the fan of the impeller is large, the rotating speed of the impeller is not high, in order to improve the rotating speed of the impeller, a hydraulic motor is used as the main driving force of the impeller, after the hydraulic motor is adopted, the rotating speed of the impeller is improved, but the strength of the impeller is affected, after the blades of the impeller are changed into straight plates, in the working process, the contact area of the blades of the impeller and the air is increased, when the impeller rotates rapidly, the blades of the impeller interact with the air, and finally the service life of the blades is reduced.

As shown in fig. 4 to 7, finally, we redesign the impeller 4, where the impeller 4 includes a shaft sleeve 41, a back plate 42, a face plate 43 and a plurality of blades 44, the back plate 42 and the face plate 43 are both circular, the diameters of the face plate 43 and the back plate 42 are equal, the shaft sleeve 41 is fixed on the rotating shaft 2 through the expanding sleeve 5, the back plate 42 coaxial with the shaft sleeve 41 is installed at one end of the shaft sleeve 41, the face plate 43 coaxial with the shaft sleeve 41 is installed at a side of the shaft sleeve 41 away from the back plate 42, an annular air inlet 46 coaxial with the shaft sleeve 41 is processed at the middle of the face plate 43, by this high coaxial precision, the stability of the impeller 4 during rotation can be improved, the more stable the impeller 4 rotates, the generated inertial force is larger, the generated wind force is stronger, a reinforcing plate for increasing the strength of the back plate 42 is installed on an end surface of the back plate 42 away from the face plate 43, each blade 44 is distributed along the radial direction of the shaft sleeve, the part of each blade 44 close to the axial line and close to the air inlet 46 is processed with an oblique angle 45 for enhancing the wind power, the oblique angle 45 refers to the angle processed at the position of the blade 44 close to the shaft sleeve 41 and the panel 43, the oblique angle 45 processed by the blade 44 is triangular, the oblique angles 45 processed on the blades 44 enclose a vortex cavity aligned with the air inlet 46, the diameter of the vortex cavity is gradually increased along the direction from the shaft sleeve 41 to the panel 43, when the impeller 4 rotates, the linear velocity of the blade 44 rotating close to the air inlet 46 is greater than that of the blade 44 close to the shaft sleeve 41, so that the vortex cavity generates vortex and forms negative pressure, after the vortex cavity forms the negative pressure, the air flows in under the action of pressure, and at the same time, the blade 44 of the impeller 4 fans the air into the air duct 11 to guide the air flow when rotating, in order to ensure that the suction force of the vortex cavity, the length of the bevel 45 is: the length of the oblique angle 45 of the blade 44 close to the axis is 1/3-2/3 of the side length, preferably 1/2 of the blade 44 close to the axis side length, the length of the oblique angle 45 of the blade 44 close to the panel 43 is 1/3-2/3 of the side length, preferably 1/2 of the blade 44 side length; in order to avoid the vortex cavity, the length of the shaft sleeve 41 is 1/4-1/2 of the side length of the blade 44 close to the axis. In order to ensure that the air inlet 46 has sufficient air input and the panel 43 and the back plate 42 guide the air, the radius of the air inlet 46 is equal to the vertical dimension from the processing position of the oblique angle 45 of the blade 44 to the axis, so that the air inlet 46 is matched with the vortex cavity to ensure that the vortex cavity forms negative pressure and guide the air flow. In addition, because the blades 44 are machined with the oblique angles 45 at the distance close to the axis, when the impeller 4 rotates, centrifugal force around the axis is generated, the centrifugal force gradually increases along with the rotating speed of the rotating shaft, inertia generated after the centrifugal force increases drives the impeller 44 to rotate, and the motor 3 drives the fan to rotate at a high speed only by using less power after driving the impeller 44 to rotate at a high speed.

The wind power generated by the finally designed impeller 4 is strong, strong vibration can be generated by cutting wind power when the impeller 4 rotates, the vibration is extremely fatal to the rotating shaft 2, in order to reduce the vibration generated by the impeller 4, the impeller 4 is connected with the rotating shaft 2 through the expansion sleeve 5, the expansion sleeve 5 comprises a spring head 51 and a mounting convex edge 52, the spring head 51 is mounted between the shaft sleeve 41 and the rotating shaft 2, the mounting convex edge 52 is integrally formed with the spring head 51, key grooves 53 aligned with the rotating shaft 2 and the shaft sleeve 41 are processed on the inner wall and the outer wall of the spring head 51, and a mounting hole 54 fixedly connected with the end face of the shaft sleeve 41 is processed on the end face of the mounting convex edge 52. After the expansion sleeve 5 is installed, only a small part of vibration generated by the impeller 4 is transmitted to the rotating shaft 2 after being absorbed by the spring head 51, so that the influence of the vibration generated by the rotation of the impeller 4 on the rotating shaft 2 is greatly reduced.

In addition, in order to ensure the air output of the volute 1, the air duct 11 in the volute 1 is gradually widened in a spiral shape along the rotation direction of the impeller 4, a silencing pipeline 6 is further installed at the air outlet of the volute 1 and used for reducing noise generated when the fan rotates to convey the air, in addition, the inner wall of the silencing pipeline 6 is in smooth transition with the inner wall of the volute 1, a silencing partition plate 61 is installed on the inner wall of the silencing pipeline 6, a silencing hole 62 is processed on the silencing partition plate 61, and one end of the rotating shaft 2 penetrates through the volute 1 and then is connected with the output shaft of the motor 3. The sound-damping duct 6 may also be made of other sound-damping materials, such as a foam sound-damping panel.

In order to ensure the output wind power of the impeller 4, the motor 3 is preferably a hydraulic motor 3, and the torque of the hydraulic motor 3 is large enough to ensure the rotating speed of the impeller 4.

The utility model discloses a use method is:

the motor 3 is started, the motor 3 drives the rotating shaft 2 to drive the impeller 4 to rotate, and since the volute 1 forms a flow channel with only the air inlet 46 and the air outlet in contact with the air, when the impeller 4 rotates, driven by the fan blade processed with the bevel angle 45, the air in the vortex cavity is fanned out by the blades 44 along the air duct 11, at this time, a negative pressure environment is formed in the vortex cavity, and the pressure of the negative pressure in the vortex cavity is gradually increased along with the increase of the rotating speed of the impeller 4, while the air inlet 46, which is aligned with the swirl chamber, continues to have air drawn in by the negative pressure created by the swirl chamber, and fan out through the vanes 44, since the blades 44 are straight plates and are distributed along the radial direction of the sleeve 41, the contact area of the blades 44 with air is the largest, the fanned-out wind force is also large, and finally the maximum wind force is generated, the hydraulic motor 3 also provides strong power for the impeller 4, and finally maximum wind power is realized in the fan with the same volume.

The air supply quantity of the impeller 4 designed in the embodiment is compared with the air supply quantity of the impeller 4 with the same size, the diameter of the adopted impeller 4 is 40 cm, the width of the impeller 4 is 20 cm, and the diameter of the impeller 4 is as follows: the diameter of the cylinder formed after the impeller 4 rotates is as follows: the thickness of the cylinder that 4 rotatory backs of impeller formed selects a general motor 3 and a pressure motor 3 during the experiment, then installs the used impeller 4 of experiment on two motors 3 to record the structure, two wind speed sensor through same model are as measuring during the experiment, and the comparison result is shown as table 1:

table 1: the unit of air supply volume of different motors adopted by different impellers is as follows: cubic meter per minute (CMM)

	Common motor	Pressure motor
			Inclined arc blade	100CMM	160CMM
Inclined straight blade	240CMM	300CMM
			Vertical arc blade	350CMM	550CMM
The utility model discloses a bevel angle blade	500CMM	800CMM

From the upper table, adopt the utility model relates to a processing has blade at the every minute that the blade at the oblique angle drives the amount of wind that the air flows the biggest.

The utility model discloses a data contrast that oblique angle 45 size produced on blade 44 adopts blade 44 to test for 20 x 16 cm's blade 44, and wherein 20 cm is the side length that is close to axle sleeve 41, and 16 cm is the side length that is close to panel 43, and when length was selected: dividing the actual length by the selected length gives the corresponding ratio, e.g. 1/3 means that the selected length divided by 20 equals 1/3, and the resulting structure is rounded to the nearest centimeter, on the basis of which the length near the axis is: 7, 8, 9, 10, 11, 12 and 13 cm; the width of the blade 44 is chosen to be away from the plane of the blade in accordance with the principle of the length chosen, and the width of the bevel 45 of the blade 44 adjacent to the panel 43 is: the wind speed sensor is used for measuring at the time of testing, and the errors are reduced by using the same wind speed sensor at the time of testing, namely, 5 cm, 6 cm, 7 cm, 8 cm, 9 cm, 10 cm and 11 cm. The results of the air flow when using different pitch lengths are shown in table 2:

table 2: the unit of variation of the air volume corresponding to the difference of the blade oblique angles is as follows: cubic meter per minute (CMM)

As can be seen from the above table, the air volume at the midpoint of the length of the blade 44 and the midpoint of the width of the blade 44 is the largest, and if one side of the blade 44 is longer and the other side of the blade 44 is shorter, or both sides of the blade are longer or both sides of the blade are shorter, the air volume is affected, according to the analysis of the negative pressure generated by the vortex cavity, when the processing length and the width of the bevel angle 45 of the blade 44 are in the middle of the side, the air volume sucked by the negative pressure generated by the rotation of the impeller 4 can satisfy the air volume of the fanning when the blade 44 rotates, and if the volume of the vortex cavity is too large, the area of the blade 44 will become smaller, so the blade 44 is difficult; if the volume of the vortex chamber is too small, the contact area between the blades 44 and the air becomes large, and it becomes difficult to reduce the rotational speed of the impeller 4, and the air flow rate by the impeller 4 decreases, so that the negative pressure in the vortex chamber is not strong, and the air flow rate by the impeller 4 decreases.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the protection scope of the present invention.

Claims (9)

1. The utility model provides a fan assembly, includes spiral case, pivot and impeller, and the pivot is installed in the spiral case to the cover is equipped with the impeller, the impeller includes axle sleeve, backplate, panel and polylith blade, the axle sleeve is fixed in the pivot through the cover that expands, the backplate with axle sleeve coaxial line is installed to axle sleeve one end, one side that the backplate was kept away from to the axle sleeve is equipped with the panel with axle sleeve coaxial line, panel middle part processing has the annular air inlet with axle sleeve coaxial line, the polylith blade is the annular around axle sleeve circumference and evenly sets up, and every blade all along the radial distribution of axle sleeve, every blade is close to the axis and is close to the air inlet part and all processes the oblique angle that is used for strengthening wind-force, the oblique angle of processing.

2. The fan assembly of claim 1, wherein: the diameter of the vortex cavity is gradually increased along the direction from the shaft sleeve to the panel.

3. The fan assembly of claim 1, wherein: the oblique angle that the blade was processed is triangle-shaped, and the oblique angle length that the blade is close to the axis is 1/3 ~ 2/3 of this length of side, and the oblique angle length that the blade is close to the panel is 1/3 ~ 2/3 of this length of side.

4. The fan assembly of claim 1, wherein: the length of the shaft sleeve is 1/4-1/2 of the side length of the blade close to the axis.

5. The fan assembly of claim 1, wherein: the back plate and the face plate are both circular, and the diameters of the face plate and the back plate are equal.

6. The fan assembly of claim 3, wherein: the radius size of the air inlet is equal to the vertical size from the oblique angle processing position of the blade to the axis.

7. The fan assembly of claim 1, wherein: the expansion sleeve comprises a spring head arranged between the shaft sleeve and the rotating shaft and an installation convex edge integrally formed with the spring head, key grooves aligned with the rotating shaft and the shaft sleeve are processed on the inner wall and the outer wall of the spring head, and installation holes fixedly connected with the end face of the shaft sleeve are processed on the end face of the installation convex edge.

8. The fan assembly of claim 1, wherein: the air duct in the volute gradually widens in a spiral shape along the rotation direction of the impeller.

9. The fan assembly of claim 1, wherein: the air outlet of the volute is further provided with a silencing pipeline, the inner wall of the silencing pipeline is provided with a silencing partition plate, and a silencing hole is processed in the silencing partition plate.

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