JP2019124209A - Impeller - Google Patents

Abstract

To provide an impeller which can easily assemble blade members which are different in alignment or different in the number of pieces.SOLUTION: An impeller 2 comprises a baseboard 11 and a shroud 21 having a plurality of blade members 25 fixed to the baseboard 11. A plurality of the blade members 25 are erected on a face part opposing the baseboard 11 of the shroud 21 in a peripheral direction with intervals, a plurality of groove parts 12 for assembling a plurality of the blade members 25 are formed at the baseboard 11, and a plurality of the groove parts 12 are formed so as to be capable of assembling a plurality of kinds of the blade members 25 possessed by the shroud 21 which are different in at least either of the alignment of the blade members 25 and the number of pieces.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an impeller provided with a substrate and a plurality of blade members assembled to the substrate.

  The above-mentioned impeller is mounted, for example in an electric pump (for example, patent documents 1). In the electric pump of Patent Document 1, an impeller is assembled to a rotor provided to a motor unit. Specifically, the impeller is configured by assembling end portions of a plurality of blade members provided in the shroud in a groove portion provided in one end surface (substrate) of the rotor.

Unexamined-Japanese-Patent No. 2016-23635

  In the case of an electric pump, impellers having different arrangements and numbers of blade members may be used depending on applications. Here, the arrangement of the blade members means the arrangement in the circumferential direction of the plurality of blade members assembled to the substrate. The arrangement of the blade members differs depending on the tilt direction and the degree of tilt of the blade members based on a straight line extending radially from the center of the substrate. Usually, the groove for assembling the blade members at one end face (substrate) of the rotor corresponds to the blade members of the shroud to be assembled. For this reason, in order to mount impellers having different arrangements and numbers of blade members on the electric pump, it was necessary to individually prepare rotors having groove portions for assembling the blade members on one end surface (substrate). .

  In view of the above situation, there is a need for an impeller that can be easily assembled with different arrangement or number of blade members.

  The characteristic configuration of the impeller according to the present invention comprises a substrate and a shroud having a plurality of blade members fixed to the substrate, wherein the plurality of blade members are circumferentially arranged on a surface portion of the shroud facing the substrate And a plurality of grooves are formed in the substrate for assembling each of the plurality of blade members, and the plurality of groove portions include at least the arrangement and the number of the blade members. One of the different types of the shrouds is formed so that each of the blade members can be assembled.

  According to this configuration, a plurality of grooves are formed in the substrate, and the plurality of grooves are formed such that each of the plurality of types of shrouds having different arrangement and / or number of blade members can be assembled. It is done. As a result, it is possible to assemble a plurality of types of shrouds having blade members of different arrangement and / or number on a single substrate. In addition, since the substrate can be shared by a plurality of types of shrouds, the manufacturing cost of the impeller can be suppressed.

  Another feature is that the substrate includes, as the plurality of grooves, a first groove and a second groove corresponding to two types of shrouds having different arrangements of the blade members, and the substrate rotates in one direction. In which the blade member for imparting centrifugal force to the fluid is the first blade member, and the blade member for imparting centrifugal force to the fluid by rotating the substrate in the direction opposite to the one direction is the second blade member. The first groove portion is formed at a position where each of the first blade members can be assembled, and the second groove portion is formed at a position where each of the second blade members can be assembled. .

  According to this configuration, when assembling two types of shrouds having different directions of blade members that impart centrifugal force to fluid by rotation to the substrate, each blade member is assembled to the first groove portion or the second groove portion. The impeller can be configured. That is, it is possible to provide two types of impellers having blade members whose rotation directions are different from each other on a single substrate. Thereby, it is possible to inexpensively manufacture impellers having different rotational directions when applying centrifugal force to the fluid.

  In another characteristic configuration, the substrate includes, as the plurality of groove portions, a first groove portion and a second groove portion corresponding to two types of the shrouds having different arrangements of the blade members, and the first groove portion and the second groove portion When a straight line extending radially outward from the center of the substrate is used as a reference line, the inclination angles with respect to the reference line are different from each other.

  According to this configuration, when assembling the two types of shrouds having the same arrangement of the blade members in the same direction of inclination of the blade members with respect to the reference line directed radially outward from the rotation axis to the substrate The impeller can be configured by assembling the blade members of the above in the first groove or the second groove. That is, two types of impellers having blade members having the same rotational direction but different inclination angles can be assembled on a single substrate. As a result, it is possible to inexpensively manufacture impellers having different discharge flow rates of fluid even at the same rotational speed.

  Another feature is that the first groove and the second groove are independently formed without crossing each other.

  According to this configuration, the first groove and the second groove can be clearly distinguished because each of the first groove and the second groove is independently formed without crossing in the substrate. Thereby, the alignment between the blade members of the shroud and the groove of the substrate can be easily performed at the time of assembly.

  Another feature is that the first groove and the second groove cross each other.

  According to this configuration, since the first groove and the second groove are formed to intersect with each other, the area occupied by the plurality of grooves in the substrate can be reduced. Thereby, compared with the case where grooves do not intersect, the degree of freedom in arranging plural kinds of grooves can be increased.

It is a perspective view of a rotor provided with an impeller. It is a longitudinal cross-sectional view of a rotor provided with an impeller. It is an exploded perspective view of an impeller. It is a top view of a shroud. It is a bottom view of a shroud. It is a bottom side perspective view of a shroud. It is a top view of one end (substrate) of a rotor. It is a top view of the substrate in the impeller of a 2nd embodiment. It is a top view which shows the modification of the board | substrate of 2nd Embodiment. It is a top view of the substrate in the impeller of a 3rd embodiment.

  Below, an embodiment of an impeller concerning the present invention is described based on a drawing.

  FIGS. 1 to 3 show a rotor unit A of an inner rotor type brushless motor used for a vehicle-mounted water pump. The rotor unit A is composed of a rotor 1 and an impeller 2 of a brushless motor. A magnet 3 is insert-molded on the rotor 1. The impeller 2 includes a substrate 11 provided on one end side of the rotor 1 and a shroud 21 joined to the substrate 11. The substrate 11 is provided on one end side of the rotor 1 via the connecting shaft portion 4 and formed in a circular shape around the rotation axis X. The rotor 1 including the substrate 11 and the connecting shaft 4 is integrally formed of a resin material.

  As shown in FIG. 2, at the central portion of the rotor unit A, a rotary shaft insertion hole 5 penetrating from the rotor 1 to the substrate 11 via the connecting shaft portion 4 is formed. A bush 6 is disposed in the rotation shaft insertion hole 5 by a method such as press-fitting or adhesion, and a shaft (not shown) is inserted into the inner peripheral surface of the bush 6 from the impeller 2 side.

  As shown in FIGS. 3 to 6, the shroud 21 is provided concentrically with a cylindrical portion 23 forming the suction port 22 and a circular flange portion 24. A plurality of (in this embodiment, seven) blade members 25 are provided from the inner circumferential surface 23 a of the cylindrical portion 23 to the back surface 24 a of the circular collar portion 24. The plurality of blade members 25 are erected along the curved shape on the inner circumferential surface 23a and the back surface 24a (an example of a surface portion facing the substrate 11) at regular intervals in the circumferential direction.

  As shown in FIGS. 5 and 6, at each of the plurality of blade members 25, an insertion piece 25 a having a rectangular shape in cross section is formed in a projecting shape with respect to the blade member 25 at the tip end opposite to the substrate 11. There is. In FIG. 6, only four of the seven blade members 25 provided in the shroud 21 are shown, and the three blade members 25 are omitted. Further, as shown in FIG. 3 and FIG. 7, a plurality of groove portions 12 which are rectangular concave portions for assembling the blade members 25 are formed in the substrate 11 by inserting each of the plurality of insertion pieces 25a. There is. The shroud 21 is fixed to the substrate 11 by ultrasonic welding of the insertion pieces 25 a of the plurality of blade members 25 and the groove 12, for example. In addition, the method of fixing the blade member 25 to the substrate 11 is not limited to ultrasonic welding, and may be vibration welding, heat welding, or the like.

  The plurality of groove portions 12 are formed such that each of the blade members 25 of the plurality of types of shrouds 21 different in at least one of the arrangement and the number of the blade members 25 can be assembled. As shown in FIG. 7, the groove portion 12 is formed in the substrate 11 twice (14 in the present embodiment) as many as the number of the blade members 25 provided in the shroud 21 (7 in the present embodiment). .

  In the present embodiment, the substrate 11 includes seven first groove portions 13 corresponding to one of two types of shrouds 21 having different arrangements of the vane members 25 as the plurality of (14) groove portions 12, and the first corresponding to the other. Seven two groove portions 14 are provided. The blade member 25 for applying a centrifugal force to the fluid by rotating the substrate 11 in one direction (for example, the direction S1 in FIG. 7) is a first blade member, and the substrate 11 is in the direction opposite to the one direction (for example When the blade member 25 that imparts centrifugal force to the fluid by rotating in the direction S2) is the second blade member, the substrate 11 combines the first blade member and the second blade member by the plurality of groove portions 12 It is configured to be attachable. Specifically, among the plurality of grooves 12, the first groove 13 is formed so that each of the first blade members can be assembled, and the second groove 14 can be assembled to each of the second blade members. It is formed to be able to. In the present embodiment, the first groove portion 13 and the second groove portion 14 are formed as grooves independent of each other without crossing on the substrate 11.

  In a part of the plurality of first groove parts 13 and a part of the plurality of second groove parts 14, convex parts 13 a and 14 a which are separated from each other are formed on two surfaces extending and opposed in the longitudinal direction. The protrusion amount of the convex part 13a and the convex part 14a is the same. The insertion piece 25 a of the blade member 25 is pressed into the first groove portion 13 and the second groove portion 14 by the convex portion 13 a and the convex portion 14 a. For this reason, the position of the shallow 21 with respect to the substrate 11 is fixed, and axial displacement of the blade member 25 is prevented even if the blade member 25 is ultrasonically welded to the substrate 11. In addition, when the impeller 2 rotates, the blade members 25 contact the convex portions 13a and 14a, so that the blade members 25 are prevented from moving relative to the substrate 11 in the rotational direction.

  The grooves 13 and 14 in which the convex portions 13a and 14a are provided are not limited to a part, but may be provided in all, and the grooves 13 and 14 are formed in the same size as the insertion piece 25a of the blade member 25. In the case, the convex portions 13a and 14a may not be provided.

  As described above, the plurality of groove portions 12 of the substrate 11 are formed at positions corresponding to the blade members 25 included in the plurality of types of shrouds 21 different in at least one of the arrangement and the number of the blade members 25. As a result, it is possible to assemble a plurality of types of shrouds 21 having different arrangements of blade members 25 on a single substrate 11. Moreover, since the board | substrate 11 can be shared with respect to the blade member 25 in which at least one of the arrangement and the number of sheets differs, the manufacturing cost of the impeller 2 can be suppressed.

Second Embodiment
In 1st Embodiment, the 1st groove part 13 and the 2nd groove part 14 showed the example in which each was formed independently, without crossing. On the other hand, in the present embodiment, as shown in FIG. 8, the first groove portion 13 and the second groove portion 14 are provided to intersect with each other. The other configuration is the same as that of the first embodiment.

  By intersecting the first groove portion 13 and the second groove portion 14, the area occupied by one groove portion 12 in the substrate 11 can be reduced. Thereby, many groove parts 12 can be arrange | positioned to the board | substrate 11, and it can be made to respond | correspond to multiple types of shroud 21. FIG.

Modification of Second Embodiment
As shown in FIG. 9, the first groove portion 13 and the second groove portion 14 formed in the substrate 11 may be formed to have different groove depths in intersecting groove portions. In FIG. 9, in the first groove portion 13 and the second groove portion 14, deep groove portions are indicated by solid lines, and shallow groove portions are indicated by broken lines. In this modification, in the circumferential direction of the substrate 11, the first groove portion 13 and the second groove portion 14 are formed so as to be approximately alternately arranged with the deep groove portion and the shallow groove portion. Although not shown, one groove (for example, the first groove 13) of the first groove 13 and the second groove 14 is made deeper, and the other groove (for example, the second groove 14) is made shallow to make a plurality of grooves 12 It may be configured.

Third Embodiment
In the present embodiment, as shown in FIG. 10, in the circumferential direction of the substrate 11, the first groove portions 15 and the second groove portions 16 are alternately arranged, and the first groove portions 13 and the second groove portions 14 have the same direction. It is inclined to However, the first groove portion 13 and the second groove portion 14 with respect to the reference line L when a straight line directed radially outward from the rotation axis X (an example of the center of the substrate 11) in the substrate 11 is a reference line L The inclination angles are respectively different. In the example shown in FIG. 10, the inclination angle of the first groove 13 with respect to the reference line L1 is θ1, the inclination angle of the second groove 14 with respect to the reference line L2 is θ2, and θ1 is larger than θ2. As described above, by forming the first groove portion 13 and the second groove portion 14 in the substrate 11, the substrate 11 of the impeller 2 has the same direction of applying a centrifugal force to the fluid by rotation, and blades having different arrangements. Two types of shrouds 21 having members 25 can be accommodated.

[Another embodiment]
In the above embodiment, the shroud 21 has seven blade members 25 and seven grooves 12 corresponding to the blade members 25 are provided on the substrate 11. However, the number of the blade members 25 included in the shroud 21 is The number of grooves 12 may be six or less or eight or more, as long as the number of groove portions 12 corresponds to the number of blade members 25 of the shroud 21.

  The plurality of grooves 12 formed in the substrate 11 may be different in the number of first grooves 13 and the number of second grooves 14. Thus, the plurality of groove portions 12 can correspond to the plurality of shrouds 21 in which the number of the blade members 25 is different.

  In the third embodiment described above, in the substrate 11 of the impeller 2 rotating in the counterclockwise direction (direction S1 in FIG. 10) when viewed from the side of the shroud 21, a plurality of types having the blade members 25 of different inclination angles (θ1 and θ2) The first groove 13 and the second groove 14 are formed to correspond to the shroud 21 of FIG. Instead of this, a plurality of types of shrouds 21 having blade members 25 of different inclination angles (θ1, θ2) in the substrate 11 of the impeller 2 rotating in the clockwise direction (direction S2 of FIG. 10) The first groove 13 and the second groove 14 may be formed to correspond to the above.

  The substrate 11 may be formed with a plurality of groove portions 12 corresponding to three or more types of shrouds 21 having blade members 25 different in at least one of arrangement and number.

  The present invention can be widely used for an impeller for assembling a blade member to a substrate.

DESCRIPTION OF SYMBOLS 1: Rotor 2: Impeller 11: Substrate 12: Groove portion 13: First groove portion 14: Second groove portion 21: Shroud 22: Suction port 23: Cylindrical portion 23a: Inner circumferential surface 24: Circular flange portion 24a: Inner surface 25: Blade member 25a: Insertion piece A: Rotor unit L: Reference line X: Rotational axis (center of substrate)
θ1, θ2: Inclination angle

Claims (5)

A substrate and a shroud having a plurality of blade members fixed to the substrate;
The plurality of blade members are erected at intervals in the circumferential direction on a surface portion of the shroud facing the substrate,
A plurality of groove portions for assembling each of the plurality of blade members are formed in the substrate,
The impeller is formed such that a plurality of the groove portions can be assembled to each of the blade members of the plurality of types of shrouds different in at least one of the arrangement and the number of the blade members. The substrate includes, as the plurality of grooves, a first groove and a second groove corresponding to two types of shrouds having different arrangements of the blade members,
A blade member that imparts a centrifugal force to the fluid by rotating the substrate in one direction is a first blade member, and a blade member that applies a centrifugal force to the fluid by rotating the substrate in a direction opposite to the one direction. In the case of the second blade member,
The first groove portion is formed at a position where each of the first blade members can be assembled, and the second groove portion is formed at a position where each of the second blade members can be assembled. Impeller described in. The substrate includes, as the plurality of grooves, a first groove and a second groove corresponding to two types of shrouds having different arrangements of the blade members,
The impeller according to claim 1, wherein the first groove and the second groove have different inclination angles with respect to the reference line when a straight line extending radially outward from the center of the substrate is a reference line.   The impeller according to claim 2 or 3, wherein the first groove and the second groove are independently formed without crossing each other.   The impeller according to claim 2 or 3, wherein the first groove portion and the second groove portion are formed to cross each other.

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