CN220706031U - Impeller for fan filter unit - Google Patents

Abstract

The utility model discloses an impeller for a fan filter unit, which belongs to the technical field of impellers and comprises an upper cover, a lower cover and a plurality of blades which are distributed around an impeller shaft line, wherein the lower cover comprises a cover body and a motor mounting cylinder arranged on the side of the cover body, which is away from the upper cover; the cover body is provided with an outer edge and an inner edge which are oppositely arranged, and gradually bulges upwards to form an arc surface from the outer edge to the inner edge so as to avoid a motor positioned below the cover body; the motor comprises a motor main body, a motor shaft and a motor mounting seat, wherein the motor shaft extends out of one end of the motor main body, the motor mounting seat is fixed at one end of the motor main body extending out of the motor shaft, a plurality of positioning columns are annularly distributed on the motor mounting cylinder, and one end, deviating from the cover body, of each positioning column is fixedly connected with the motor mounting seat. The technical scheme has the advantages of compact structure, small volume, high fitting degree of the impeller and the motor, low wind resistance and smooth air flow.

Description

Impeller for fan filter unit

Technical Field

The utility model belongs to the technical field of impellers, and particularly relates to an impeller for a fan filter unit.

Background

The fan filter unit is to combine the fan and the filter together, the fan is rotated by the impeller to suck air into and pass through the filter, so that clean uniform air flow is formed, the fan filter unit is generally applied to a clean room, and can convey relatively stable clean air.

The Chinese patent with the publication number of CN107023509B discloses a fan impeller and a fan adopting the impeller, the fan impeller comprises a rear wheel disc and blades, the bottoms of the blades are arranged on the disc surface of the rear wheel disc in sequence along the circumferential direction of the rear wheel disc, the outer side edges of the blades are air outlet edges, the fan adopting the fan impeller comprises a volute, a motor and an air inlet ring, the fan impeller is arranged inside the volute, and the rear wheel disc of the fan impeller is arranged on an output shaft of the motor.

In the prior art, the rear wheel disc is a flat plate, and the middle part of the rear wheel disc is provided with a shaft hole for installing an output shaft of a power supply machine, wherein the occupied space of the power supply machine is larger, and the occupied volume of a fan filtering unit for assembling the impeller and the power supply machine is large; in addition, the motor and the impeller are low in laminating degree and high in wind resistance, and particularly, the motor occupies the inner space of the impeller shell, namely the inner space of the volute, and is generally arranged outside the impeller shell, so that the motor and the impeller are poor in combination compactness.

Disclosure of Invention

In order to solve the technical problems, the technical scheme of the utility model is as follows: an impeller for a fan filter unit comprises an upper cover, a lower cover and a plurality of blades which are distributed around the axis of the impeller,

the lower cover comprises a cover body and a motor installation cylinder arranged on the side, deviating from the upper cover, of the cover body;

the cover body is provided with an outer edge and an inner edge which are oppositely arranged, and gradually bulges upwards to form an arc surface from the outer edge to the inner edge so as to avoid a motor positioned below the cover body;

the motor comprises a motor main body, a motor shaft and a motor mounting seat, wherein the motor shaft extends out of one end of the motor main body, the motor mounting seat is fixed at one end of the motor main body extending out of the motor shaft, a plurality of positioning columns are annularly distributed on the motor mounting cylinder, and one end, deviating from the cover body, of each positioning column is fixedly connected with the motor mounting seat.

Specifically, the upper cover, the lower cover and the blades are integrally formed.

Specifically, the lower end port of the motor mounting cylinder is higher than the position of the outer edge.

Specifically, the locating column is provided with a shaft hole, and the shaft hole is fixedly connected with the motor mounting seat through a bolt.

Specifically, a damping ring is arranged at the port of the shaft hole.

Specifically, the reference column has three at least, the reference column has the root of being connected with the lid and the tip that relative root set up, along tip to root, the reference column external diameter increases gradually, the reference column is close to the outer wall of motor main part side laminating motor.

Specifically, motor assembly holes are formed in the center of the cover body, the central axis of the cover body passes through the hole center of the motor assembly holes, and the aperture of the motor assembly holes is smaller than the diameter of the motor installation cylinder.

Specifically, a tuyere is arranged at the center of the upper cover, and the upper cover gradually bulges upwards to form a curved surface from the radial outer edge of the upper cover to the tuyere.

Specifically, the blade is curved along its own length.

Compared with the prior art, the technical scheme provided by the utility model has the following advantages:

the utility model adopts the design of the integrally formed curved surface upper cover, the curved surface blades and the curved surface lower cover, wherein the curved surface lower cover is upwards convex, so that a lower space is avoided, the motor is assembled in the space, the whole volume of the motor and the impeller after being assembled is reduced, simultaneously, the motor is enabled to sink a fixed point, the lower cover is combined with a motor drawing, the laminating degree is high, the connection is tight and stable, the wind resistance is reduced, and the air flow is smooth.

Drawings

FIG. 1 is an overall block diagram of an impeller for a blower filtration unit in accordance with an embodiment of the present utility model;

FIG. 2 is a side view of an impeller for a blower filtration unit in accordance with an embodiment of the present utility model;

FIG. 3 is an assembly view of a impeller and motor in an embodiment of the present utility model;

fig. 4 is a diagram showing a structure of a lower cover in the embodiment of the present utility model.

The figure shows: 1. an upper cover; 11. a first bar-shaped groove; 12. an air port; 2. a lower cover; 21. a second bar-shaped groove; 22. a cover body; 23. a motor mounting cylinder; 24. a motor assembly hole; 25. an outer edge; 26. an inner edge; 27. positioning columns; 28. a shaft hole; 29. a damping ring; 3. a blade; 4. a motor main body; 5. and a motor mounting seat.

Detailed Description

For ease of understanding, the impeller for a fan filter unit is described below in connection with embodiments, which are to be understood as merely illustrative of the utility model and not limiting the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions and positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 2, an impeller for a fan filter unit comprises an upper cover 1, a lower cover 2 and blades 3 which are integrally formed, wherein a plurality of blades 3 are distributed around an impeller shaft, the upper ends of the blades 3 are connected with the upper cover 1, the upper cover 1 at the joint of the upper cover 1 and the lower cover 2 is concavely formed into a first strip-shaped groove 11 with an upward opening, the lower end of the blades 3 is connected with the lower cover 2, the lower cover 2 at the joint of the lower cover 2 is convexly formed into a second strip-shaped groove 21 with a downward opening, the opening width of the second strip-shaped groove 21 is larger than the opening width of the first strip-shaped groove 11, and the protrusion height of the second strip-shaped groove 21 is larger than the concave depth of the first strip-shaped groove 11.

With continued reference to fig. 1, the upper cover 1 has a ring shape with a circular tuyere 12 at the center thereof, and the air flow enters from the tuyere 12 and exits from the gap between the adjacent blades 3, and gradually rises upward from the radially outer edge of the upper cover 1 to the tuyere 12 to be curved.

With continued reference to fig. 1, the side of the blade 3 near the impeller axis is the front side, the side away from the impeller axis is the rear side, the blade 3 extends from the front side to the rear side to be its own length, and is curved along its own length direction.

Referring to fig. 3, a motor driving the impeller to rotate is mounted on the lower cover 2, the motor includes a motor body 4, a motor shaft extending from the lower end of the motor body 4, and a motor mounting seat 5 fixed at the lower end of the motor body 4, the motor shaft is coaxial with the motor body 4, and the motor body 4 can drive the motor shaft to rotate, and the motor mounting seat 5 is fixedly connected on the housing of the motor body 4.

Referring to fig. 3 and 4, the lower cover 2 includes a cover 22 and a motor mounting cylinder 23 disposed on a side of the cover 22 facing away from the upper cover 1, the cover 22 is ring-shaped, a circular motor mounting hole 24 is formed at a center of the cover 22, a central axis of the cover 22 passes through a hole center of the motor mounting hole 24, that is, an impeller axis passes through a hole center of the motor mounting hole 24, the cover 22 has an outer edge 25 and an inner edge 26 which are oppositely disposed, the cover 22 gradually bulges upward to form an arc surface from the outer edge 25 to the inner edge 26 so as to avoid a motor located below the cover 22, a lower end port of the motor mounting cylinder 23 is higher than a position of the outer edge 25, and the motor body 4 on an upper side of the motor mounting seat 5 is completely assembled into the motor mounting cylinder 23.

With continued reference to fig. 3 and 4, the motor mounting cylinder 23 is annularly provided with five positioning posts 27, the positioning posts 27 have roots connected with the cover 22 and ends arranged opposite to the roots, and the outer diameter of the positioning posts 27 gradually increases from end to root; in addition, since the wall thickness of the motor mounting cylinder 23 is smaller than the outer diameter of the positioning column 27, the cylinder diameter of the motor mounting cylinder 23 is larger than the aperture of the motor assembly hole 24, the upper end face of the positioning column 27 can be completely connected with the cover 22, and the connection strength between the positioning column 27 and the cover 22 is improved; the side wall of the positioning column 27, which is close to the motor main body 4, is consistent with the arc shape of the outer wall of the motor, and then the side wall of the positioning column 27 is attached to the outer wall of the motor, so that the motor is combined with the drawing of the lower cover 2.

Referring to fig. 3 and 4, the positioning column 27 is provided with a shaft hole 28, a damping ring 29 is arranged at the lower end port of the shaft hole 28, the shaft hole 28 is fixedly connected with the motor mounting seat 5 through bolts, the motor mounting seat 5 is fixed on the motor mounting cylinder 23, the motor main body 4 is mounted on the lower cover 2, wherein the axis of the motor mounting cylinder 23 passes through the axis of the impeller, the axis of the motor positioned in the motor mounting cylinder 23 also passes through the axis of the impeller, the motor is coaxial with the impeller, the assembled motor shaft extends downwards, the motor main body 4 is positioned in the motor mounting seat 5 and is fixed relative to the motor mounting seat 5, and when the motor is in use, the motor shaft is static, and the motor main body 4 and the impeller synchronously rotate.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with other technical features, which do not depart from the scope of the technical scheme of the embodiments of the present utility model.

Claims (9)

1. An impeller for a fan filter unit is characterized by comprising an upper cover, a lower cover and a plurality of blades which are distributed around the impeller shaft line,

the lower cover comprises a cover body and a motor installation cylinder arranged on the side, deviating from the upper cover, of the cover body;

the cover body is provided with an outer edge and an inner edge which are oppositely arranged, and gradually bulges upwards to form an arc surface from the outer edge to the inner edge so as to avoid a motor positioned below the cover body;

the motor comprises a motor main body, a motor shaft and a motor mounting seat, wherein the motor shaft extends out of one end of the motor main body, the motor mounting seat is fixed at one end of the motor main body extending out of the motor shaft, a plurality of positioning columns are annularly distributed on the motor mounting cylinder, and one end, deviating from the cover body, of each positioning column is fixedly connected with the motor mounting seat.

2. The impeller for a fan filter unit according to claim 1, wherein the upper cover, the lower cover, and the blades are integrally formed.

3. The impeller for a fan filter unit according to claim 1, wherein the lower end port of the motor mounting cylinder is located higher than the outer edge.

4. The impeller for a fan filter unit according to claim 1, wherein the positioning column is provided with a shaft hole, and the shaft hole is fixedly connected with the motor mounting seat through a bolt.

5. The impeller for a fan filter unit according to claim 4, wherein a damping ring is provided at a port of the shaft hole.

6. The impeller for a fan filter unit according to claim 1, wherein there are at least three positioning columns, the positioning columns have roots connected with the cover body and ends arranged opposite to the roots, the outer diameter of the positioning columns gradually increases from end to root, and the positioning columns are attached to the outer wall of the motor near the motor main body side.

7. The impeller for a fan filter unit according to claim 1, wherein a motor assembly hole is formed in the center of the cover body, the center axis of the cover body passes through the hole center of the motor assembly hole, and the aperture of the motor assembly hole is smaller than the diameter of the motor mounting cylinder.

8. The impeller for a fan filter unit according to claim 1, wherein a tuyere is provided at the center of the upper cover, and the upper cover gradually bulges upward to be curved from the radially outer edge of the upper cover to the tuyere.

9. The impeller for a fan filter unit according to claim 1, wherein the blade is curved along its own length.