JP2012087713A - Blower impeller and blower with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a wind amount while securing a static pressure by making a blowout side linear shape from a rear edge root of a hub in an axial-flow blower impeller where the blade whose outer circumferential side of the rear edge is more protruded in a blowout direction than the hub is attached to the substantially truncated conical hub, and that is used for a ventilation blower.SOLUTION: The blower impeller includes the substantially truncated conical hub 1 and the blade 2 whose outer circumferential side of the rear edge is closer to the blowout side than the hub side, and a connection part with the hub 1 in the rear edge is located on a side surface of the hub 1. The side surface of the hub 1 from the connection part of the rear edge of the blade 2 the end of the blow-out side is made to be linear in an axial direction. Accordingly, the wind amount can be increased while securing the static pressure, thereby the wind amount can be increased even at high static pressure.

Description

  The present invention relates to a blower impeller used for a ventilation blower.

  Conventionally, this type of blower impeller is known as a blower impeller having blades attached to a substantially truncated cone-shaped hub. (For example, refer to Patent Document 1).

  Hereinafter, the blower impeller will be described with reference to FIG.

  As shown in FIG. 8, blades 102 are attached to a substantially truncated cone-shaped hub 101.

  In the above configuration, the substantially frustoconical hub receives rotational force from the outside and is driven to rotate, thereby generating wind by the pressure-increasing action of the blades 102, and the airflow swirling due to the inclination of the side surface of the substantially frustoconical hub 101. Used to increase ingredients and increase static pressure.

JP 2006-291735 A (page 21, FIG. 1)

  In such a conventional blower impeller, the static pressure rises due to the substantially truncated cone-shaped hub, but the substantially truncated cone-shaped hub is inclined to the position of the trailing edge of the blowing side. Has a problem that the flow rate is increased and the flow path is obstructed to reduce the air flow.

  Therefore, the present invention solves such a conventional problem, and an object thereof is to increase the air volume while ensuring a static pressure.

  In order to achieve this object, the present invention provides an axial-flow fan impeller in which a blade having a substantially frustoconical hub attached with a blade whose outer peripheral side of the rear edge protrudes in the blowing direction from the hub side is attached. This is a blower impeller having a configuration in which the blowout side is linear from the edge of the rim, thereby achieving the intended purpose.

  According to the present invention, a substantially frustoconical hub that is rotationally driven by receiving a rotational force from the outside, and a plurality of blades that extend radially around the hub, the blade has a trailing edge. The outer peripheral side of the hub is located on the outlet side with respect to the hub side, and the hub base on the rear edge of the hub is located in the middle of the side surface of the hub, and the outlet side has a linear shape from the blade rear edge root of the hub. . Thereby, by providing the straight portion on the blowing side of the substantially truncated cone-shaped hub, it is possible to increase the air volume while securing the static pressure because it does not hinder the flow path of the blowing portion. By increasing the air volume while ensuring the static pressure, the air volume can be increased even at high static pressure.

The perspective view which shows the air blower impeller of Embodiment 1 of this invention. The block diagram which shows the cross section which shows the blower impeller The perspective view which shows the air blower impeller of Embodiment 2 of this invention. The perspective view which shows the air blower impeller of Embodiment 3 of this invention. The perspective view which shows the hub straight part of the blower impeller The perspective view which shows the hub of the air blower impeller of Embodiment 4 of this invention. Perspective view showing the blades of the blower impeller The perspective view which shows the air blower of Embodiment 5 of this invention. The block diagram which shows the cross section which shows the conventional fan impeller

  According to a first aspect of the present invention, a blower impeller includes a substantially frustoconical hub that is rotationally driven by receiving a rotational force from the outside, and a plurality of blades that extend radially around the hub. , The outer peripheral side of the rear edge is located on the outlet side with respect to the hub side, and the root on the hub side of the rear edge is located in the middle of the side surface of the hub, and the outlet side from the rear edge root of the hub blade Has a linear configuration. Thus, by providing a straight portion on the outlet side of the substantially frustoconical hub, the air volume can be increased while securing the static pressure, so the air volume can be increased while securing the static pressure. The air volume can be increased even at high static pressure.

  Further, when the axial dimension of the substantially frustoconical hub from the front end of the hub suction side to the blade trailing edge is A, and the axial dimension of the hub from the blade trailing edge to the outlet side is B, A> You may make it the structure used as B. This increases the static pressure and increases the air volume by making the distance from the tip of the hub to the blade trailing edge root longer from the blade trailing edge root to the outlet side in the substantially frustoconical hub axial dimension. It is possible to increase the air volume while securing the static pressure, and it is possible to increase the air volume even at high static pressure.

  Further, when the outer diameter of the fan impeller is D, the outer diameter of the blade trailing edge of the substantially truncated cone-shaped hub is d, and the axial dimension from the blade trailing edge of the hub to the outlet side is B, the hub ratio It may be configured such that d / D is 0.25 <d / D <0.55, and the ratio B / D of B to the blower outer diameter D is 0.05 <B / D <0.15. Thereby, the hub ratio d / D is 0.25 <d / D <0.55, and the ratio B / D of B to the blower outer diameter D is 0.05 <B / D <0.15. Since the static pressure can be secured while increasing the air volume, the air volume can be increased even at high static pressure by increasing the air volume while securing the static pressure.

  The hub may have a notch on the blade leading edge side. Thereby, since the mold can be easily manufactured by considering the shape of the die cutting, the mold cost can be reduced by facilitating the manufacture of the mold.

  Moreover, you may make it the structure of attaching the linear shape part from the blade | wing trailing edge root of a hub to the blowing side as another component. This makes it easier to create the mold by making the linear part from the root edge of the hub blade to the blowout side a separate part, making the mold easier and reducing the cost of the mold. There is an effect that it can be achieved.

  Further, the hub and the blade may be configured as separate parts, and the blade may be attached to the hub. By making the hub and blades separate parts, this makes it easy to create the blade and hub molds, making it easier to create the molds and reducing the cost of the molds. Play.

  Moreover, you may make the structure of welding the attachment method of another component. As a result, the strength of the component is increased by welding, so that the strength of the component is increased, thereby reducing the risk of breakage during operation.

  Moreover, you may make the structure of screwing the attachment method of another component. Thereby, by screwing, the strength of the component is increased, and the strength of the component is increased, thereby reducing the risk of breakage during operation.

  Moreover, you may make it the structure of a blower provided with the fan impeller, the motor which rotates this, and the flame | frame which fixes a motor. As a result, the pressure can be increased by the rotation of the blower impeller, and by providing the straight portion on the outlet side of the substantially truncated cone-shaped hub, the air volume can be increased while securing the static pressure. There is an effect that it can be used as a blower capable of increasing the air volume even at static pressure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 and 2, the blower impeller includes a substantially truncated cone-shaped hub 1 and blades 2. In the blade 2, the outer peripheral side of the rear edge is located closer to the outlet side than the hub side, and the connecting portion with the hub 1 at the rear edge is located in the middle of the side surface of the hub 1. The side surface from the connection part of the rear edge of the blade | wing 2 to the blowing side edge part of the hub 1 has a linear shape in the axial direction.

  In the present embodiment, the height of the hub 1 is 35 mm, the outer diameter of the blade is 130 mm, and the straight portion of the hub 1 from the connecting portion of the rear edge of the blade 2 to the outlet side end portion is 12 mm. Since the suction side of the hub 1 has a substantially truncated cone shape, it is possible to increase the static pressure by promoting the circumferential component of the flow along the inclination of the side surface of the hub 1. Further, since the side surface from the connecting portion of the rear edge of the blade 2 of the hub 1 to the outlet side end portion is linear in the axial direction, the hub 1 is not obstructed without obstructing the flow path of the outlet from the blade 2. However, the air volume can be increased as compared with the one having a truncated cone shape from the suction side to the discharge side.

  In addition, the axial distance A from the suction side to the connecting portion of the rear edge of the blade 2 that is a truncated cone-shaped side surface of the hub 1 and the rear of the blade 2 that is the linear side surface portion of the hub 1 When the axial distance B from the edge connecting portion to the outlet side end portion is set to A> B, the circumferential component of the flow is promoted along the inclination of the side surface of the hub 1 to increase the static pressure. The effect can be kept high.

  When the outer diameter of the blower is D and the outer diameter of the blade trailing edge of the substantially truncated cone-shaped hub is d, the hub ratio d / D is 0.25 <d / D <0.55, and the outside of the blower When the ratio B / D of B to the diameter D is 0.05 <B / D <0.15, the hub ratio d / D is 0.25 <d / D <0.55. The hub 1 is enlarged so that the inclined portion cannot be provided and the static pressure cannot be increased by promoting the circumferential component of the flow along the inclination of the side surface of the hub 1. Too much, the hub 1 has a dimension that does not obstruct the flow path in the axial direction and reduce the air volume, and the air volume is increased by B / D being 0.05 <B / D <0.15. Effect can be enhanced, and the influence on product dimensions can be reduced. When B / D is 0.05 or less, the distance from the rear edge of the hub to the outlet side short part is shortened, and the flow from the rear edge diffuses into the shaft side of the hub. It will be reduced. When B / D is 0.15 or more, the distance from the rear edge of the hub to the outlet side short part becomes longer, the height of the blower impeller becomes higher, and the height occupied by the fan when installing the product is higher. Therefore, the size of the product increases.

(Embodiment 2)
In FIG. 3, the same parts as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 3, when viewed from the front in the axial direction of the hub, the curve of the front edge of the blade and the curve of the front edge of the blade are moved in the circumferential direction at a portion close to the front edge side of the substantially frustoconical hub 1. The area formed by connecting the curve can be removed in the axial direction by inserting a notch 3 that is cut off in the axial direction, making it easy to mold without using a slide mold. It becomes.

  In the present embodiment, the outer diameter of the blade is 130 mm, the notch 3 of the hub 1 is 5 mm from the front edge, and the mold strength can be ensured by having a size of 5 mm or more, and a large number of moldings are performed. Even so, the life of the mold can be extended. When the thickness is 5 mm or less, the shape can be formed, but the strength is weakened, and when a large number of moldings are formed, it is broken by repeated stress.

  When viewed from the front in the axial direction of the hub, if it includes an area formed by connecting the curve of the front edge of the blade and the curve of the front edge of the blade moved in the circumferential direction, for example, in the center direction Furthermore, there is no difference in the effect even if the cut is made or the curve obtained by moving the curve of the front edge of the blade in the circumferential direction is a straight line.

(Embodiment 3)
4 and 5, the same parts as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 4, the substantially truncated cone-shaped part of the hub 1 and the blade 2 are formed by integral molding, and the straight part is formed as a separate part as the hub straight part 4 as shown in FIG. By attaching the hub straight part 4 to the outlet side end of the fan, a blower impeller is obtained. Molding with separate parts reduces the consideration of undercuts in mold creation and facilitates mold creation.

  Also, the welding method is to weld the parts of the resin to the same strength as the integral molding, and by screwing, the two parts can be easily connected. Or because of increased strength compared to bonding with an adhesive, the risk of breakage during operation is reduced.

(Embodiment 4)
6 and 7, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  A substantially frustoconical hub 1 as shown in FIG. 6 and a blade 2 are formed as separate parts as shown in FIG. Molding with separate parts reduces the consideration of undercuts in mold creation and facilitates mold creation.

  In addition, the connection method is welded or screwed to increase the strength and reduce the risk of breakage during operation.

(Embodiment 5)
In FIG. 8, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  By attaching the motor 6 and the frame 7 to the blower impeller 5, wind can be sent as the blower 8. For example, as shown in FIG. 8, by attaching a motor having a 48 mm outer diameter and a frame having an opening having a 90 mm inner diameter to the fan impeller 5 having an outer diameter of 85 mm, the pressure can be increased by the rotation of the fan impeller 5. By ensuring that the air volume is increased, there is an effect that it is possible to provide a blower that can increase the air volume even at high static pressure.

  The blower impeller according to the present invention can be applied to a ventilation fan, a fan, an air conditioner, a computer cooling blower, and the like, which are industrial products using the blower.

1 Hub 2 Blade 3 Notch 4 Hub Straight Line 5 Blower Impeller 6 Motor 7 Frame 8 Blower 101 Hub 102 Blade

Claims (9)

A substantially frustoconical hub that is driven to rotate by receiving a rotational force from the outside, and a plurality of blades that extend radially around the hub, the outer peripheral side of the rear edge being the hub side The hub side of the rear edge of the hub is located in the middle of the side surface of the hub, and the outlet side is linearly formed from the rear edge of the blade of the hub. Blower impeller to do. When the axial dimension of the substantially truncated cone-shaped hub from the hub suction side tip to the blade trailing edge root is A, and the axial dimension from the blade trailing edge root to the outlet side of the hub is B, A> B The blower impeller according to claim 1. When the outer diameter of the blower impeller is D, the outer diameter of the blade trailing edge of the substantially truncated cone-shaped hub is d, and the axial dimension from the blade trailing edge of the hub to the outlet side is B, the hub ratio d 3 / D is 0.25 <d / D <0.55, and the ratio B / D of B to the outer diameter D of the blower is 0.05 <B / D <0.15. Blower impeller. The blower impeller according to any one of claims 1 to 3, wherein the hub has a notch on a blade leading edge side. The blower impeller according to any one of claims 1 to 4, wherein a straight part from a blade rear edge root of the hub to a blowing side is attached as a separate part. The fan impeller according to any one of claims 1 to 4, wherein the hub and the blades are configured as separate parts, and the blades are attached to the hub. The blower impeller according to claim 5 or 6, wherein a method for attaching the separate part is welding. The blower impeller according to claim 5 or 6, wherein the attachment method of the separate part is screwed. A blower comprising the blower impeller according to any one of claims 1 to 8, a motor for rotating the blower impeller, and a frame for fixing the motor.

Images